Quick hitch

 

This invention relates to a quick coupling for attaching a tool to a boom of a hydraulic excavator. Quick-acting coupling for attaching a tool to a boom of a hydraulic excavator and the like machines contains part of the quick hitch on the side of the boom and part of the quick hitch on the side of the instrument, connected to each other with fixing by means of a pair located at a distance from each other axes fixation. After connecting only the first of these two axes commit two parts of the quick hitch is located can be rotated together around the first axis of fixation and connection with the specified second axis fixation, the hydraulic connection of the power circuit for auto-connect fitting of the power circuit on the side of the tool from the fitting of the power circuit on the side of the boom. Hydraulic connection of the power circuit has a connecting part of the power circuit on the side of the boom and the connecting part of the power circuit on the side of the tool, which is located on part of the quick hitch on the side of the boom and on the part of the quick hitch on the side of the tool, respectively, with information mecistogaster hitch around the specified first axis commit to automatically connect to each other these two connection elements of the power circuit. At least one of the two connection elements of the power circuit mounted for rotation around an axis parallel to the specified first axis commit and move in the direction perpendicular to the specified first axis fixation. Hydraulic connection of the power circuit includes a linear guide to compensate for the rotational movement of the two connecting parts of the power circuit during the mixing of these connection elements of the power circuit together on a circular path around the specified first axis fixation installed with the possibility of sending these two connection elements of the power circuit linearly relative to each other in a straight line during the connection. Increases reliability and service life of quick-hitch. 25 C.p. f-crystals, 20 ill.

The technical field to which the invention relates

The invention relates to a quick coupling for connection of the tool with the boom of a hydraulic excavator or similar, with part of the quick hitch on the side of the boom and part of the quick hitch on the side of the instrument can be connected to each other with fixing by means of a pair located at a distance d is whom the connection fitting of the power circuit on the side of the tool from the fitting of the power circuit on the side of the boom, the connection of the power circuit has a connecting part of the power circuit on the side of the boom and the connecting part of the power circuit on the side of the tool, which is located on part of the quick hitch on the side of the boom or on the part of the quick hitch on the side of the tool, so they are automatically connected with each other, as only two parts of the quick hitch together in a locked position when rotating around the first of the two axes of the commit.

The level of technology

Quick-hitch rotary type are widely used in hydraulic excavators, as they provide quick and easy replacement of different tools, such as hydraulic grapples, buckets for education ditches, clamps, etc., Initially you need to bring in a starting position one of the two axes commit and put in the clutch to connect. Preferably it may be a transverse finger, which is suspended in a hook eyelet on the opposite side of the hitch. Then the part of the hitch on the side of the boom can be rotated relative to the tool axis fixation, already cited in connection to find thereby the detent in which Phi is you can move away from each other and be sent to the corresponding latch holes on the opposite end of the quick hitch.

This quick-hitch rotary type are known from WO 91/01414, which provides automatic hydraulic connection, automatically connecting the power circuit on the side of the boom with the power circuit on the side of the tool, when the two parts of the quick-hitch rotary closer. In this case, there are two connecting part of the power circuit, one of which is fixed to part of the quick hitch on the side of the boom, and the other on the part of the quick hitch on the side of the tool, in such a way that the two connecting part of the power circuit are moved towards each other and are entered in the connection when the two parts of the quick coupling are rotated towards each other around a fixed axis fixation. One of the two connection elements of the power circuit mounted for movement on the respective part of the quick hitch to compensate for the movement around the circumference of the parts of the quick hitch during turning of convergence.

However, this rapid hitch is flawed in many aspects. The connecting part of the power circuit are not connected tightly with the approach of parts, high performance coupling denitely parts of the power circuit they are subjected to high wear and can even be damaged.

The invention

The basis for this invention is the task of creating an improved quick-hitch of the type specified above, which provides the shortcomings of the prior art and its further development. In particular, should be provided with superior location of the connection of the power circuit, which provides the connection without leakage and without defects power circuits on the side arrows on the side of the instrument.

According to the invention this task is solved with a quick coupling in accordance with paragraph 1 of the claims. Quick-acting coupling for attaching a tool to a boom of a hydraulic excavator and the like machines contains part of the quick hitch on the side of the boom and part of the quick hitch on the side of the instrument, connected to each other with fixing by means of a pair located at a distance from each other axes commit such a way that after the connection is only the first of these two axes commit two parts of the quick hitch is located can be rotated together around the first axis of fixation and connection with the specified second axis fixation, the hydraulic connection of the power circuit for automy, when this hydraulic connection of the power circuit has a connecting part of the power circuit on the side of the boom and the connecting part of the power circuit on the side of the tool, which is located on part of the quick hitch on the side of the boom and on the part of the quick hitch on the side of the tool, respectively, with the possibility of information together in a circular motion around the specified first axis is fixed by the rotation of these two parts of the quick-hitch around the specified first axis commit to automatically connect to each other these two connection elements of the power circuit, with at least one of the two connection elements of the power circuit mounted for rotation about an axis, parallel to the specified first axis commit and move in the direction perpendicular to the specified first axis fixation, and the hydraulic connection of the power circuit includes a linear guide to compensate for the rotational movement of the two connecting parts of the power circuit during the mixing of these connection elements of the power circuit together on a circular path around the specified first axis fixation installed with the possibility of extending the sanitary connection.

Preferred embodiments of the invention are presented in the dependent claims.

According to the invention the connecting part of the power circuit are moved towards each other strictly linear way. Provided a linear guide for the connecting parts of the power circuit, which causes to move the connecting part of the power circuit relative to each other along a straight line as opposed to a circular rotary movement. To provide rotary movement of at least one of the connection elements of the power circuit is installed on the corresponding part of the quick hitch can be moved relative to it. However, as a further development of the prior art is provided that is installed with the possibility of moving the connecting part of the power circuit compensates for rotary movement while the convergence of the parts of the quick-hitch and moved in such a way that is strictly linear movement between the two coupling parts of the power circuit.

According to a further development of the invention the linear guide has at least one guide element on the side of the boom and lacretia connection of the power circuit before as two of the connecting part of the power circuit, in particular their connection fitting are engaged with each other. For this linear guide is engaged and comes out of it when the rotary movement of the two parts of the quick-hitch around already fixed first axis of fixation, such as the connecting part of the power circuit. However, the engagement of the guide elements of the linear guideway is before gearing connecting fittings connecting parts of the power circuit, so that the linear direction of the connecting parts of the power circuit is provided from the outset. If this can't happen no tilting and precise linear motion across the path of the connection parts of the power circuit. For this guide linear guide elements are designed as separate components, separately from the connecting elements of the power circuit, i.e., the threaded elements. Preferably they are still on the connecting parts of the power circuit, or may be welded thereto.

In General, the linear guide can be performed in different ways. For example, there may be provided a Cam section to set the value of connecting parts of the power circuit. Can also be provided for controlling movement of the movable connecting part (movable connecting parts) power circuit using Cams. However, in another modification of the invention is preferably provided as guide elements, at least one guide pin on one of the connection elements of the power circuit and at least one guiding hole on the other connecting part of the power circuit.

The guide pin is moved with an exact fit into the corresponding guide hole when the connecting part of the power circuit are moved towards each other, thereby providing linear motion. Preferably provided by a pair of guide pin located at a distance from each other, and the respective guide holes, with the connecting fitting is made with the possibility of placing them between the guide fingers or guide holes, respectively. The longitudinal axis of the guide pin parallel to the direction in which the connecting fitting can be moved towards each other. As the connecting fittings connecting part of the power circuit may have previously investirovanie fingers) linear guide preferably have a spherical shape, which eliminates distortion during introduction into the corresponding guide hole. In particular, each guide pin has a rounded head, a cylindrical guide portion and the constriction provided between the head and the cylindrical guide part.

In the area of the narrowing of the guide pin has a diameter that is reduced as compared to a cylinder or cylindrical guide part. Rounded head can be entered in the routing hole with a small angular offset. Equalization or compensation of angular displacement occurs when the cylindrical guide surface, which is removed in the axial direction from the head of the finger, also engages with the guide hole.

At least one of the two connection elements of the power circuit mounted for movement relative to the corresponding part of the quick hitch. Preferably, only one set can be moved, while the other is rigidly connected with the other part of the quick hitch. This provides a simple arrangement, which, however, provides the necessary compensation for rotary movement.

Mobility ustav particular, install the connecting part of the power circuit may allow at least one tilting movement about an axis parallel to the first axis, fixing, and moving in the direction perpendicular to the first axis fixation. She also preferably allows the pusher to move parallel to the first axis of fixation and/or tilting movement about the axis of tilting perpendicular to the first axis fixation. This installation with forced movement can be compensated well as lateral displacement arising, for example, as a result of inaccurate Assembly. In addition, simplifies the manufacture of the parts of the quick-hitch at the expense of coarser tolerances.

According to another modification of the invention, one of the two connection elements of the power circuit mounted on a spring device, in particular on a pair of compression springs. Compression springs can be fixedly mounted on a corresponding part of the quick hitch and jointly bear the corresponding connecting part of the power circuit. Compensation for rotary movement relative to the corresponding part of the quick hitch is due to the deformation of a spring mechanism.

To ensure Nadezhina in the direction of movement of the connection. According to another modification of the invention may provide a pressure plunger, on which sits a roaming connection part of the power circuit with possibility of inclination and/or movement.

Push the plunger preferably has a rounded head that can come approximately in the center between the spring elements of the spring device on the connecting part of the power circuit. Push the plunger firmly and securely presses the connecting part of the power circuit to each other at the final stage of movement of the connection. Preferably push the plunger may preferably have an adjustable length. In particular, push the plunger can be made elastic to prevent damage and ensure the compensation of tolerances, and the stiffness of the spring pressure of the plunger is much higher stiffness of the spring elastic install the connecting part of the power circuit.

According to another modification of the invention push the plunger may be made in the form of a hydraulic pusher, i.e., he can be nominated or be loaded in the retracted position, creating pressure environment. Thus, it is installed with the possibility of moving the connecting part of the power circuit can * connection elements of the power circuit so that to the connecting part of the power circuit could be held securely in their close position.

Preferably the hydraulic pressure, which push the plunger holds together the two connecting part of the power circuit, consistent with the respective working conditions. The force that holds together the connecting part of the power circuit, always selected so large that the part is completely held together without a gap at any time. On the other hand, movement is not always carried out with maximum power, which is sufficient to hold the parts together under all working conditions. The last is the lack of decision by means of a spring. If you push the plunger must withhold part of the quick hitch together only by force of a spring, the spring must be very large to hold part of the quick hitch together under all conditions, the forces must operate in a wide area that is too large. The pressure preferably regulate by means of a hydraulic pusher.

Push the plunger may be provided, in particular, the working environment of one of the existing circuits of the working environment, i.e. push the plunger is under the VPI. Thus, holding together the power also increases, depending on the operating pressure in the tool.

According to another preferred modification of the invention the ratio of the areas between the effective area of the working cylinder of the pressure of the follower, which operates the working fluid, and an effective surface of the fitting, i.e. the effective cross-sectional area of flow through the connection, to which a working fluid perpendicular to the direction of connection in the area of the fittings, is chosen greater than 1. In a preferred embodiment, the ratio of the areas may reach approximately 5/4. Due to this, the ratio of the areas holding force applied pressure plunger, is always greater than the maximum force that tries to break the connection of the power circuit. If the working pressure in the arteries of the working fluid to be connection increases, the force acting to push the plunger and thereby holding force also increases. Usually there are many fittings of the working fluid. Therefore, it may be provided by many of lever pushers. In this case, the ratio of the sum of the effective areas ) of the invention, the cylinder pressure of the plunger or cylinder lever pushers can be connected by a thread with many, in particular with all the highways of the working fluid circuit of the working fluid to be connection. Between the trunks of the working fluid and the cylinder (cylinders) preferably is a system of valves, which always provide the connection with screw-down pusher one of the highways of the working fluid having the highest pressure. Thus, always ensure the effect of the pressure of the follower with a large enough pressure. As a system of valves line of the working fluid can be connected in pairs with the help of a pendulum valve, which always provides higher pressure.

Push the plunger can be supplied from different parts of the circuit of the working fluid. It is possible to connect the circuit of the working fluid on the side of the boom with pressure plunger. Typically fittings for liquid provided with means for preventing leakage due to the pressure plunger can be used when the socket is not yet connected, so the fittings are connected through the nomination of the pressure of the follower. However, according to a preferred variant implementation of the invention, the cylinder (s) is fed from the circuit of the working fluid on the side of the tool, i.e., they are influenced by pressure only when it is to be connected with an independent hydraulic line.

According to another modification of the invention may also be provided by the convergence of the connection elements of the power circuit with a time delay relative to the rotary movement of the fast hitch. This simply means that the hydraulic effect of pressure on the plunger may be delayed in time.

May be provided by a separate hydraulic circuit for actuation of the pressure of the follower.

Installed with the possibility of moving the connecting part of the power circuit and thereby push the plunger may be located generally on the side of the boom. However, according to another modification of the invention, they are provided on the sides of the instrument.

Should be possible relative movement between the pressure plunger and connecting part of the power circuit to which it affects, namely, how to move the tilt and movement perpendicular to the longitudinal axis of the pressure of the follower. On the one hand, installed with the possibility of moving the connecting part of the power circuit compensates for rotary movement of the halves of the quick-hitch, the result of the circular movement produces linear motion. Additionally, the connecting part of the power circuit, on which they act, must be able to move relative to each other. To ensure, in spite of this, high forces can be provided that the clutch pusher provided at the end surface of the pressure cap that has a flat end surface, so that it can fit tightly over a large surface to essentially flat connecting part of the power circuit. To ensure movements of inclination is preferably provided that the pressure cap and push the plunger have a surface curved complementary way with respect to each other, which they installed at each other, so that the cap can bend in the pushrod, and, in spite of this surface is provided on the connection.

For reliable holding together the two connecting parts of the power circuit even in difficult operating conditions may provide for positive locking of the two connection elements of the power circuit as an alternative or in addition to the hydraulic pressure plunger. According to another modification of the invention can be provided that the guide pin linear guide block when moving it is aromasine transverse finger, which is installed in the connecting part of the power circuit with the specified routing hole. Fixing transverse finger is actuated preferably hydraulically, i.e. when the guide pin is fully vdvinul into a guiding hole, the locking transverse finger is moved along the tangent to the guide hole, so that it is included in the routing hole, namely in the area, in which there is a narrowing of the guide finger.

According to another preferred variant implementation of the invention can be provided in a separate rod for the geometric circuit connecting two parts of the power circuit in their United position. Preferably provides the valve is in the form of a rod. For actuation of the rod provides the installation cylinder, preferably hydraulic. The rod may influence the spring, so that it is loaded in the locked position. Thus, the drive means must be used to unlock.

According to another modification of the invention provides a pre-alignment in addition to the linear guide for connecting two parts of the power circuit on powerchip einfeldia part of the power circuit relative to each other prior to engagement of the linear guide so, that the corresponding guiding elements linear guide can include each other in accordance with their intended purpose. It yields, in particular, the benefits, if you are working without the control operator of the first axis fixation is not well established or is pushed fully when turning to connect the two parts of the quick hitch. In this case, errors may occur in the alignment of the connecting parts of the power circuit, which can damage the connection of the power circuit when their convergence. Pre-alignment also adjusts too large alignment errors of the connecting parts of the power circuit relative to the corresponding part of the quick-hitch, which can occur, for example, because the installation can move at least one of the connection elements of the power circuit.

Tool pre-alignment can be performed in different ways. It preferably has a pair of centering surfaces that slide over each other when turning the convergence of the parts of the quick hitch and one of which is provided on an installed can move the connecting part of the power circuit. Another wsimages the ACLs another modification of the invention it may be located on the opposite part of the quick hitch. They, in particular, are arranged so that they come into engagement before the linear guide.

According to another modification of the invention in addition to the print alignment can be provided by the rotary guide, which provides the ability to swivel between the two parts of the quick-hitch only with the desired alignment relative to each other, i.e. when properly aligned first axis fixation. Rotary guide prevents damage to the hydraulic connections at the convergence of the parts of the quick hitch offset. In the latter case, the connecting elements or guide pins of the connecting parts of the power circuit is also moved together with the shift and cause damage. Rotary guide has a guide surface provided preferably on themselves durable swivel connecting parts of the power circuit, while the guide surface of the slide, going for each other, or slide over each other to properly align the parts of the quick coupling with rotary convergence around the first axis fixation. They can be made centering so that when turning parts, all specifications the operation is aligned to the first axis commit.

The guiding surfaces preferably prevent the displacement of the two halves of the quick hitch relative to each other before fixing the second axis fixation, in particular, when the connecting part of the power circuit are already logged into engagement with each other. Such a shift would necessarily damage the connection of the power circuit. The guide surface can be, in particular, are made so that they interact with the first axis commit hook made as soon as they collide with each other, thereby preventing any possible displacement or slippage of the halves of the quick hitch relative to each other.

According to a particularly preferred variant implementation of the invention the connection of the power circuit is a mounting site that can consistently be installed on two parts of the quick hitch. It is not an integral part of high-speed changer. The connection of the power circuit is preferably performed so as to replace the existing high-speed changer.

To ensure good access to the connection of the power circuit according to another modification of the invention the connection of the power circuit mo is viewed in the chain is not in a remote place between the two axes commit that provides easy access, for example for cleaning. In addition, in this case it is not located directly in the space between the two axes of the fixation, which would lead to the accumulation of dirt.

According to another modification of the invention the connection of the power circuit is located within adjacent zones of the part of the quick hitch on the side of the tool and/or part of the quick hitch on the side of the boom, in particular so that, in a state of separation of the two parts of the quick hitch from each other, the connecting piece does not touch the ground when the corresponding part of the quick hitch is placed on the ground. Two parts of the quick coupling can preferably have each two spaced apart load-bearing element is essentially perpendicular to the axis of fixation, and the connecting part of the power circuit can be placed across each of them between two respective bearing elements. They are located in a protected area between the perpendicular to the bearing elements of the parts of the quick hitch. Bearing elements parts quick hitch pushing each other or overlap each other in the zone axes of fixation. Depending on browneller axes commit and which can be located in the connecting part of the power circuit. Through this prevents the indentation in the ground connecting part of the power circuit, located on part of the quick hitch when it is put on the ground.

According to another modification of the invention connecting two parts of the power circuit is made in each essentially plate-like form. The already mentioned coupling elements in the form of a socket or pin, which form the socket of the power circuit, located on the plate-like carrier connection elements of the power circuit. Guide pins or guide holes can be fixed or made in the space between them.

List of drawings

Below is the description of the invention on the example of preferred embodiments and with reference to the accompanying drawings. In the drawings shown:

Fig.1 - quick coupling according to a preferred variant implementation of the invention, which has a pair of mechanical parts quick-hitch and hydraulic connection, while the mechanical part of the quick hitch are in engagement with only one of the two axes of fixation, and the hydraulic connection is still not connected, in isometric projection;

Fig.2 - fast coupling according to Fig.1, if e is connected, in isometric projection;

Fig.3 - fast coupling according to Fig.1, with part of the quick hitch are in engagement with only one of the axes of fixation, side view;

Fig.4 is a partial cut quick hitch, this hydraulic connection is in position in front of the entrance engages the connecting parts of the power circuit, in an enlarged scale;

Fig.5 is a partial cut quick hitch, similar to Fig.3, but in a different section planes, which is performed in the form of a slot and pin threaded connection components;

Fig.6 is a partial section of the hydraulic connections, showing the engagement of the linear guide hydraulic connection shortly before full connection hydraulic connection, on an enlarged scale;

Fig.7 is a partial section of the hydraulic connection, which shows the hydraulic connection state of complete fixation, front view;

Fig.8 - fast coupling according to another preferred variant implementation of the invention in which both the connecting part of the power circuit hydraulic connection is established with the ability to move;

Fig.9 - connecting part of the power C is the execution of the invention; and

Fig.10 - fast coupling according to another preferred variant implementation of the invention, which provides a preliminary alignment set to move the connecting part of the power circuit through the surface of the pre-centering on the rotary converged parts quick hitch, side view;

Fig.11 is a partial cut quick hitch, similar to Fig.4, which shows the hydraulic connection shortly before entering into engagement with each other of the two connecting parts of the power circuit, in an enlarged scale;

Fig.12 is a partial cut quick hitch, similar to Fig.7, which shows the hydraulic connection state of complete fixation, while the guide pin one connecting part of the power circuit fixed transverse finger in the other connecting part of the power circuit, front view;

Fig.13 is a section along the line a-a in Fig.12;

Fig.14 - hydraulic connection state of complete fixation, with two connecting part of the power circuit is fixed flush with the help installed with the possibility of rotation of the rod;

Fig.15 is a partial cut fast hitch, inania with hydraulically driven screw-down pusher shortly before the establishment of the connection;

Fig.16 is a partial section similar to Fig.4, which shows the hydraulic connection state of complete convergence;

Fig.17 is a partial section of the hydraulic pressure of the pusher of Fig.15 and 16, in an enlarged scale;

Fig.18 is a diagram of a circuit for actuation of the two hydraulic lever pushers, according to a variant of execution, shown in Fig.15-17;

Fig.19 - lower installed with the possibility of moving part of the hydraulic connection according to Fig.1-18, in isometric projection;

Fig.20 is a partial section of the guide finger connection of the power circuit, which leads to linear convergence of the two connection elements of the power circuit.

Information confirming the possibility of carrying out the invention

Shown in the figures quick coupling 1 has a part 2 quick hitch side arm, which is fixed to rotate on the shaft of the arrow 3 hydraulic excavator and which can be rotated with the rotary plate (not illustrated) is in itself known manner around the axis 4 of rotation perpendicular to the longitudinal axis of the shaft of the arrow 3. In addition, quick coupling 1 has a part 5 fast hitch on the side of the tool to the rotary mechanism 6, driven hydraulically.

The two parts 2 and 5 quick hitch 1 may be fixed to each other by means of two parallel axes 7 and 8 of the fixing, which are at a distance from each other and which can be fixed. As shown in Fig.1, the axes 7 and 8 of fixation are parallel to the axis 4 of rotation, around which the quick-release coupling 1 can be rotated relative to the shaft of the arrow 3.

The first axis 7 of the two axes commit formed, on the one hand, transverse finger 9, provided in part 5 fast hitch on the side of the tool, and a pair of latch hooks 10, provided in part 2 quick hitch on the side of the boom. Clasping hooks 10 can hook in transverse finger 9, so that it engages the clasping hooks 10, and can be raised portion 5 quick hitch on the side of the tool. As shown in Fig.2 and 3, latch hooks 10 are hook cavities open on one side, which surround the transverse finger 9 in the form of paleobiology. In this connection the deepening of open hooks to the side part 2 quick hitch, which is remote from the second axis 8 of the commit.

On the other hand, the second axis 8 of fixation are formed paste 12. As shown in Fig.3, a pair of latch fingers 11 is located on part 2 quick hitch on the side of the boom and can vdvinut'sā and be nominated, preferably hydraulically, using previously known drive mechanism. The clasping holes 12 formed in part 5 fast hitch on the side of the tool. As shown in Fig.1 as part 2 quick hitch on the side of the boom, and part 5 fast hitch on the side of the tool are essentially vertical load-bearing elements, which are located at a distance from each other, namely, are located at different distances from each other, while supporting plate part 2 quick hitch on the side of the boom can enter between the bearing plates part 5 fast hitch on the side of the instrument.

To connect the two parts 2 and 5 quick hitch first part 2 quick hitch on the side of the boom is moved to part 5 fast hitch on the side and transverse finger opposite end of the quick hitch hook engages latch recess 10 (Fig.3). Due to the small raising part 2 quick hitch on the side of the boom can both the Noah recess 10.

To fix the second axis 8 of the fixing part 2 quick hitch on the side of the boom and then turn around the axis 4 of rotation, so that the two parts 2 and 5 quick-hitch rotary converge around the first axis 7 of the fixing so that a pair of latch fingers 11 and the corresponding latch holes 12 are identical to each other. Then clasping the fingers 11 are preferably hydraulically moved apart so that they are included in the clasping holes 12. The two parts 2 and 5 quick hitch still connect to each other using two axes 7 and 8 of the commit.

To prevent displacement of the two halves of the quick hitch and result in damage to sensitive hydraulic connection, the description of which will be described below, during the rotation of the two parts 2 and 5 quick-hitch around the first axis 7 of fixation, the two parts 2 and 5 quick hitch can be fitted with a rotary guide 44 (Fig.11). Two solid parts 2 and 5 quick couplers each have a guide surface 46 and 47 (Fig.11), which can be moved against each other or one behind the other, when the first axis 7 commit exactly the same. If, for example, the driver of the excavator inaccurate rawaudio surfaces 46 and 47 can be made so as so they have a centering action, i.e., moved to part 2 and 5 quick hitch into position aligned properly when turning convergence.

To supply the drive members on the side of the instrument energy quick coupling 1 is equipped with a hydraulic connection 13, which connects the hydraulic circuit on the side of the boom with a hydraulic circuit on the side of the tool. For example, the rotation mechanism shown in Fig.1, may operate hydraulically. Can be provided with other transmission elements and accordingly can be provided to connect a variety of hydraulic circuits.

The hydraulic connection 13 has two connecting parts 14 and 15 of the power circuit, which is installed on the one hand, part 2 quick hitch on the side of the boom and, on the other hand, on part 5 fast hitch on the side of the tool. They are located on the sides of the parts 2 and 5 quick hitch, opposite first and second axes 7 and 8 of the commit, and exactly the same distance from the first axis 7 of the commit, so that they move towards each other when turning the convergence of the two parts 2 and 5 of the quick hitch. In principle about the limited two axes 7 and 8 of the fixing because practice has shown that the latter is associated with pollution and difficulty of access. By the arrangement of the connecting parts 14 and 15 of the power circuit from outside the axes 7 and 8 commit less chance of breakage and easier maintenance. As shown in Fig.1 and 7, the connecting piece 14 and 15 of the power circuit are located between each perpendicular to the bearing elements 16 part 2 quick hitch on the side of the boom or between the perpendicular to the bearing elements 17 part 5 fast hitch on the side of the tool. Thus, they are protected. They, in particular, does not stand for parts 2 and 5 quick hitch, so connecting parts 14 and 15 of the power circuit is not pressed into the ground, when appropriate parts 2 and 5 of the quick hitch is placed on the ground.

The two connecting parts 14 and 15 of the power circuit cover many connections power lines. Each of them is made in the form of block fittings, which combines multiple connecting elements 18. Each of the two connecting parts 14 and 15 of the power circuit has a plate-like supporting member 19 or 20, which are respectively transversely to the relevant part 2 or 5 speed silicasol fluid, planted perpendicular to the plate-like bearing elements 19 and 20. The connecting element 18 can be connecting elements in the form of a socket or pin, previously known.

According to a variant of execution, shown in Fig.1-7, the connecting part 14 of the power circuit, located on part 2 quick hitch on the side of the boom, fixed, i.e., rigidly with respect to part 2 quick hitch. The connecting portion 15 of the power circuit, located on part 5 fast hitch on the side of the tool mounted for movement relative to it.

As shown in Fig.4 and 7, all of the connecting part 15 power circuit planted in the spring system 21, which in the shown embodiment consists of four compression springs located around the perimeter of the rectangle. Springs 22 compression ratio is fixed at one end on the outer plates, which are perpendicular to the supporting elements 17 part 5 fast hitch on the side of the tool (Fig.7). At the other end of the cylindrical spring 22 is connected, preferably screwed to the plate-like bearing element 19 of the connecting part 15 of the power circuit. Springs 22 are of sufficient height and firmness, Taishet configured to move along many axes, a support for the connecting part 15 of the power circuit, what can compensate for the offset opposite the connecting part 14 of the power circuit, in particular, due to the rotary movement of the parts 2 and 5 of the quick hitch.

As shown in Fig.3 and 6, the two connecting parts 14 and 15 of the power circuit are automatically moved through the rotary movement of approach of the parts 2 and 5 quick-hitch and synchronously with them. In this regard, the connecting parts 14 and 15 of the power circuit should move circumferentially around the first axis 7 of fixation. However, since the connecting elements 18 must bring in a linear manner on the two connecting parts 14 and 15 of the power circuit, the rotary movement of the connecting parts 14 and 15 of the power circuit is compensated by a spring system 21. To ensure accurate linear movement of the hydraulic connection 13 is connected with the linear guide 23, which moves the connecting parts 14 and 15 of the power circuit in the direction towards each other exactly along a straight line, in spite of the rotary movement of the parts 2 and 5 of the quick hitch. Linear guide 23 is, in the shown embodiment, of a pair of guide fingers 24 and the corresponding direction of the compulsory parts 14 and 15 of the power circuit. In this regard, they make the springs 22 to deviate to compensate for the rotary movement of the components. In addition, compensates for the offset caused by the tolerances of the Assembly.

The guide pins 24 are rigidly connected to plate-like bearing element 19 of the connecting part 15 of the power circuit and are perpendicular to it, in the direction opposite to the connecting part 14 of the power circuit. Each guide pin 24 is made essentially cylindrical. However, each guide pin 24 has a rounded head 26, a cylindrical guide portion 27 and the constriction 28, located between them, which separates the rounded head 26 from the cylindrical guide part 27. Thanks to the design of the guide pin 24 prevents distortion during entry into the guide holes 25. As shown in Fig.20, the envelope surface of the guide fingers 24 may be spherically rounded in the area of the head 26. Spherical curvature enters the constriction 28. Additionally, there may be conical inclination of the cylindrical part or the guide part 27, which may be from 5 to 15preferably approximately 10. SFU is shining finger in the opposite guide holes without distortions. In the input area of the cross section of guide holes can have an extension of the cross-section in the camera view, curves or, etc. to facilitate entry (Fig.4). Guide holes 25, or made in the form of nests guides are preferably made of a suitable material and is inserted into the connection part 14 of the power circuit on the side of the arrows,

To prevent the absence of guide fingers 24 into the guide holes 25 due to the strong bias when parts 2 and 5 quick coupling approach, can be provided by means of 29 preliminary alignment for pre-centering of the two coupling parts 14 and 15 of the power circuit relative to each other. In Fig.10 shows an example of such means 29 preliminary alignment. At one end installed with the possibility of moving the connecting portion 15 of the power circuit may have a centering surface 30. At the other end the opposite end of the quick hitch can be provided by a Cam centering surface 31, which slides centering surface 30, when converging the two parts 2 and 5 of the quick hitch. Print alignment provides at the chain, when they moved apart.

To ensure reliable and complete convergence of the connecting elements 18 preferably provides an actuator which becomes active on the last stretch of road is turning for the rapprochement of parts 2 and 5 quick-hitch and fully presses the connecting parts 14 and 15 of the power circuit to each other. In particular, there may be the push pin 32 on which is planted installed on the springs connecting part 15 power circuit (Fig.6). Because the spring must be sufficiently elastic to compensate for rotary movement or displacement, they can bounce and shrink, so it is full of connections hydraulic connections. Push the plunger 32 serves as a stroke limiter stroke spring support.

As shown in Fig.6, the head pressure of the pusher 32 is preferably slightly rounded, so that, even when slightly tilted position set with the ability to move the connecting part 15 power circuit push the plunger 32 is in the center. Push the plunger 32 can also be made elastic. As shown in Fig.6, push the plunger 32 may be a finger, the set can be made in the form of a set of spring washers. The spring pressure of the plunger 32 is expected to be significantly higher than the stiffness of the spring system 21 for installation with the ability to move the connecting part 15 of the power circuit. As shown in Fig.6, the connecting part 15 power circuit sits on the compression plunger 32 at the end of the movement of convergence. Then the specified push the plunger fully presses installed with the possibility of moving the connecting part 15 power circuit opposite to the connecting part 14 of the power circuit while the remaining rotary convergence of parts 2 and 5 of the quick hitch. It provides a complete circuit of the hydraulic connection.

According to the alternative implementation of the invention the push pin 32 may be driven hydraulically pressure plunger. For this purpose, the system must be inverted, i.e. installed with the possibility of moving the connecting part of the power circuit is preferably located on part 2 quick hitch on the side of the boom, so push the plunger can be supplied from the hydraulic system on the side of the boom. Using the pressure of the pusher, which can be extended hydraulically, can be applied increased in the hydraulic connection with the driven hydraulically pressure plunger. The connecting part of the power circuit is typically installed with the ability to move or elastically in the manner described above, so that you can build on the previous description. As shown in Fig.15, push the plunger is moved to its original position so that an air gap between the plate-like bearing element 19 and the end surface of the pressure of the pusher 32. Thus, the connection of the power circuit starts by means of springs 22 or attached their efforts, while the linear guide ensures the movement of the two connecting parts of the power circuit perpendicular to each other. In this regard, as shown in Fig.16, is called the elastic deformation of the mounting springs.

For a reliable hold together the two connecting parts of the power circuit when working, even with great effort provides hydraulic pressure to the plunger 32, which presses on the center of the bearing member 19, so that it is pressed tightly to the supporting element 20 on the side of the boom. Can be provided by two or more hydraulic clamping elements 32. As shown in Fig.17, push the plunger 32 includes a cylinder-piston unit, which consists of a plunger piston 60 and the cylindrical liner 61, NAPA power circuit, attached to the tool without the possibility of release fluid.

As shown in Fig.17, the plunger piston 60 is loaded by a spring module 63, and it is in its extended position, in which it is displaced in the direction of the ledge on the side of the cylindrical sleeve with the help of the ledge 64. As spring module 63 can be provided by disc springs of suitable thickness. Disc springs are of such dimensions that they spring, when the connecting part of the power circuit are shifted together. Fixed hold together without a gap under all operating conditions is provided by a hydraulic plunger action of the piston 60. For this purpose the plunger piston 60 and the chamber 66 of the pressure connected with hydraulic lines tool through the opening 65 to the working fluid.

In Fig.18, in the shown embodiment, four lines 67, 68, 69, 70 for the working environment are forwarded using fittings 71 connection of the power circuit by the arrows on the side of the tool quick coupler. Highway 67-70 for the working environment on the side of the tool is connected to the chamber 66 of the pressure of the pressure of the pusher 32. In this regard, highway 67-70 are also grouped in pairs using the system pendulum valves 72, 73 and 74. Mantrala 67-70 for the working environment with the highest pressure. Therefore, the chamber 66 of the pressure of the pressure of the pusher 32 is always applied most of the pressure existing in the highways 67-70.

The effective area of the plunger piston, which creates a regulatory effort in this regard more than the sum of the squares of the cross-section of the socket 71. Thus, due to the fact that in the circuit of the plunger piston is always a very high pressure, it is ensured that holds together the force is always greater than the forces caused by pressure fittings, seeking to break the connection of the power circuit.

As shown in Fig.17, on the front end of the plunger piston mounted presser cap 75, which has an essentially flat end surface. It always provides surface contact with the plate support member 19 and prevents excessive pressure that would arise at the point of contact. In order, despite this, to ensure that the change in the slope, the connecting surface 76, which touch each other end surface of the plunger piston 60 and the presser cap 75 are symmetrically rounded surfaces of revolution, which gives the possibility to change the inclination between the pressure cap and plunger piston 60. Despite this, abrasivos above, when can be a large effort, which can decompress the connecting part of the power circuit. To prevent this, maybe not necessarily lock is also provided with a positive locking of the connecting parts 14 and 15 of the power circuit.

As shown in Fig.12 and 13, the connecting part 14 of the power circuit may be provided mounted for movement transverse finger 48. Transverse finger 48 is located so that it can move tangentially into a guiding hole 25, namely in the area in which shrinking 28 guide fingers 24 when the guide pin is fully vdvinul. As shown in Fig.13, a transverse finger 48 may have a portion with a different diameter. If the finger is inserted into a guiding hole 25 part with a large diameter, the guide pin 24 is fixed. If transverse finger 48 moves in the guide hole part 25 with a smaller diameter, the guide pin 24 can be pushed inwards and outwards. Transverse finger 48 is preferably driven hydraulically. In the locked position it can be optionally loaded by means of a spring, so that the hydraulic drive is used only for output from the commit.

Cree using geometric circuit (Fig.14). According to another modification of the invention, the rod 49 may be made in the form of a rocker arm, which is installed with the possibility of rotation around the axis 51 of the rotation on the connecting part 14 of the power circuit. It has at one end a curved hook that could catch the clasping protrusion 52 on the opposite coupling part 15 of the power circuit. The rod 49 is preferably loaded in its locked position by means of a spring 50. Additionally, with the rod 49 pivotally connected to the hydraulic cylinder 53 for rotation in position without fixation (Fig.14). The hydraulic cylinder is preferably located on the side of the boom prior to connection with the hydraulic system.

In Fig.8 shows an alternative installation of the connecting parts 14 and 15 of the power circuit. In this case, both the connecting part of the power circuit is set to move. The connecting part 14 of the power circuit, mounted on part 2 quick hitch on the side of the boom, installed with the possibility of rotation around the transverse axis 33 on the rotary plate 34. The rotary plate, in turn, is mounted on part of the quick hitch can be rotated around the axis 35 of rotation, parallel the howling chain may not necessarily, be provided with a spring mechanism.

The second connecting part 15 of the power circuit, which is fixed to part 5 fast hitch on the side of the tool is also installed with the possibility of moving. In the shown embodiment, it is installed to be movable in the longitudinal direction, namely in a plane that is parallel to the first axis 7 of the fixing quick hitch 1. As shown in Fig.8, the second connecting part 15 of the power circuit can be moved from left to right. It is held in its neutral position by the springs.

In Fig.9 shows an alternative installation with the ability to move the connecting part 15 power circuit provided on the side of the tool. It is installed on the rotary plate 36 which can be rotated around a transverse axis 37 in the direction of the first axis 7 of fixing them. The connecting part 15 power circuit mounted on the rotary plate 36 may also be rotated around the axis 38 of the slope. As shown in Fig.9, the axis 38 of the slope is parallel to axis 37. The connecting portion 15 of the power circuit is held in its neutral position on the rotary plate 36 by means of springs 39.

In Fig.10 pokazatelstva hitch on the side of the boom. It is installed with slope to cross the finger 40, which runs parallel to the first axis 7 of fixation. In addition, the connecting part 14 of the power circuit mounted on the finger 40 with the possibility of bias. It has an elongated hole 41, so that there is a possibility of bias across the finger 40. The connecting part 14 of the power circuit is held in its neutral position by means of a spring 42. Additionally, provided is the above-mentioned means 29 preliminary alignment, which runs the pre-centering of the connecting part 14 of the power circuit when it is moved to the opposite coupling part 15 of the power circuit when turning the convergence of the parts 2 and 5 of the quick hitch.

Jutting upward spike on the bottom of the connecting part of the power circuit, which includes the Cam surface 31 has a dual function. Namely, it simultaneously forms a rotary guide 44, which forces the two parts of the quick hitch taken properly aligned position when moving towards each other. Positions 46 and 47 in this case also indicated the appropriate guiding surface.

Possible other types of mouth is not represented. For example, the elastic unit may be provided by replacing the springs of the spring system 21 shown in Fig.1-7, elastic elements, for example rubber. In addition, instead of the self-adjusting device can be provided with forced setting for at least one of the connection elements of the power circuit, so that it compensates for the rotary movement of the parts 2 and 5 quick-hitch and provides a strictly linear movement of the two connecting parts of the power circuit.

With shows quick hitch can be provided significant benefits. In particular, when the fixing speed of the hitch at the same time you fix a hydraulic connection. Additionally, the hydraulic connection 13 can be installed in existing high-speed capture, in particular, owing to their shows device and location, i.e., not integrated, and suited. The location of the hydraulic connection 13 provides good accessibility for maintenance and repair. In addition, by adapting the connection to quick hitch, you can resize and adapt to existing conditions is disgust too much stretching of the elastic installation connecting part of the power circuit when rassledovanie quick hitch can be a stop 80. As shown in Fig.19, the stop 80 can be formed by two protrusions in the direction which moves when rassledovanie resiliently mounted plate 19 of the bearing member. The stops 80 are preferably located in the center, i.e., formed their line passes through the center through the guide fingers 24 of the connection of the power circuit.

Claims

1. Quick-acting coupling for attaching a tool to the boom (3) of the hydraulic excavator and the like machines, containing part (2) quick couplers on the side of the boom and part (5) quick hitch on the side of the instrument, connected to each other with fixing by means of a pair located at a distance from each other axes commit such a way that after the connection is only the first of these two axes commit two parts (2,5) quick hitch are can be rotated to each other around a first axis (7) fixing and connection with the specified second axis (8) commit hydraulic connection (13) of the power circuit for auto-connect fitting of the power circuit on the side of the tool from the fitting of the power circuit on the side of the boom, while the hydraulic connection of the power circuit has soedineniya located on part (2) quick couplers on the side of the boom and part (5) quick hitch on the side of the tool, respectively, with the possibility of information together in a circular motion around the specified first axis is fixed by the rotation of these two parts (2,5) quick-hitch around the specified first axis (7) commit to automatically connect to each other these two connection elements of the power circuit, characterized in that at least one of the two coupling parts (14, 15) of the power circuit mounted for rotation around an axis parallel to the specified first axis (7) of the commit, and move in the direction perpendicular to the specified first axis (7) of fixation, while the hydraulic connection (13) of the power circuit includes a linear guide (23) to compensate for the rotational movement of the two coupling parts (14, 15) of the power circuit, during the mixing of these coupling parts (14, 15) the power circuit together on a circular path around the specified first axis (7) fixing set with directions of the two coupling parts (14, 15) of the power circuit linearly relative to each other in a straight line during the connection.

2. Quick hitch under item 1, characterized in that the linear guide (23) has at least one guide element (25) on the side of the boom and at least one guide element (24) on the side of the tool, located with the possibility of engagement with each other when closing hydraulic connection (13) of the power circuit, in particular, before entering into engagement with each other of the two connecting parts (14,15) of the power circuit.

3. Bystrany, at least one guide pin (24) on one connecting part (15) of the power circuit and at least one guiding hole (25) of the other connecting part (14) of the power circuit for receiving at least one guide finger, while the guide pin (24) preferably has a rounded head, a cylindrical guide portion (27) and narrowing (28) between the head and the guide part.

4. Fast hitch on p. 3, characterized in that the guide pin (24) is fixed in its inserted into a guiding hole (25) position by means of rolling, in particular, is installed with the ability to actuate hydraulically cross fingers (48), which is installed in the connecting part (14) of the power circuit, having a guiding hole (25).

5. Quick coupling according to any one of paragraphs.1-4, characterized in that only one of the two connection elements of the power circuit mounted for movement relative to the corresponding part of the quick hitch.

6. Quick coupling according to any one of paragraphs.1-3, characterized in that the two connecting part of the power circuit mounted for movement relative to parts (2, 5) fast is it (15) mounted for movement preferably spring system (21) of the spring (22) compression.

8. Quick coupling according to any one of paragraphs.1-7, characterized in that it provides push the plunger (32), who planted one of the two connecting parts (15) of the power circuit with the possibility of tilt or shift.

9. Fast hitch on p. 8, characterized in that the push plunger (32) has a finger that is installed with the possibility of longitudinal displacement, which is loaded by means of a spring (43).

10. Fast hitch on p. 7, characterized in that the push plunger (32) is mounted with the possibility of displacement of the cylinder is communicated with the working environment.

11. Fast hitch on PP.7, 10, characterized in that the cylinder is communicated with the working environment during the mixing of the connecting parts of the power circuit, and the ratio of the effective areas of the cylinder surface, exposed to the working environment, to the effective surface of the socket (71), when exposed to the working environment in the area of fittings perpendicular to the direction of connection is greater than 1.

12. Quick coupling according to any one of paragraphs.1-11, characterized in that the cylinder is connected by a thread with all the highways (67, 68, 69, 70) chain working environment when connecting the connecting parts of the power circuit, when this system is provided pendulum, VCU working environment, under the greatest pressure.

13. Quick coupling according to any one of p. 11 or 12, characterized in that the cylinder is connected to a hydraulic line of the tool.

14. Fast hitch on p. 10, characterized in that the cylinder is connected with independent hydraulic line.

15. Quick coupling according to any one of paragraphs.1-14, characterized in that it has a push plunger (32), mounted with capability information of the connecting parts of the power circuit with a time delay relative to the rotary convergence speed hitch.

16. Quick coupling according to any one of paragraphs.1-15, characterized in that the push plunger (32) is provided on the end surface of the pressure cap (75) mounted tiltable, with pressure between the plunger and the pressure cap is provided, in particular, rounded relative to each other complementary way to the surface.

17. Quick coupling according to any one of paragraphs.1-16, characterized in that at least one of the connecting parts (15) of the power circuit mounted for movement around an axis parallel to the first axis (7) of the fixing and/or installed so that they can move in the direction, there is eat, she has the means (29) preliminary alignment for pre-alignment of the two coupling parts (14, 15) of the power circuit when turning the convergence of the parts (2, 5) quick-hitch, which preferably has a pair of centering surfaces (30, 31) to slide over each other when the rotary convergence and one of which is mounted with the ability to move the connecting part (15) of the power circuit and the other to the other connecting part (14) of the power circuit or the relevant part (2) quick hitch.

19. Quick coupling according to any one of paragraphs.1-18, characterized in that it has a rotary guide for the two parts (2, 5) quick hitch, to ensure their alignment relative to each other when the rotary convergence or prevent turning of rapprochement with improper alignment.

20. Quick coupling according to any one of paragraphs.1-19, characterized in that the rotary guide (44) is the guiding surfaces (46, 47) located at a distance from the first axis (7) of the commit, which is located on part (2) quick couplers on the side of the boom and part (5) quick hitch on the side of the tool, installed with who is ment hitch around the first axis (7) of the commit.

21. Quick coupling according to any one of paragraphs.1-20, characterized in that the hydraulic connection (13) of the power circuit is made in the form of an Assembly for serial installation in two parts (2, 5) quick-hitch.

22. Quick coupling according to any one of paragraphs.1-21, characterized in that the hydraulic connection (13) of the power circuit is located outside the two axes (7, 8) of the commit.

23. Quick coupling according to any one of paragraphs.1-22, characterized in that each of the two parts (2, 5) quick-hitch has two located at a distance from each other of the bearing element (16, 17) perpendicular axes (7, 8) fixation, and each of the two coupling parts (14, 15) of the power circuit is located between two respective bearing elements across them.

24. Quick coupling according to any one of paragraphs.1-23, characterized in that each of the two coupling parts (14, 15) of the power circuit has two plate-like supporting element (19, 20) and is designed as a pin or socket connecting element (18) positioned perpendicular to the plate-like bearing elements, with the guide pins (24) and the guide holes (25) are preferably rigidly connected with the bearing elements (19, 20) or formed in them for l-24, characterized in that each of the two coupling parts (14, 15) of the power circuit is made in the form of a connecting node, which has a connecting element (18) for mains power circuit.

26. Quick coupling according to any one of paragraphs.1-25, characterized in that it has a rod (49) for fixing flush two coupling parts (14, 15) of the power circuit when the connection is, in this case the rod (49) preferably loaded in its locked position by means of a spring and/or hydraulically.

Priority items:

09.03.2001 PP.1-10, 17-26;

04.12.2001 PP.11-16.

 

Same patents:

The invention relates to a safety device for high-speed towed device designed for securing the working tool at the end of the capture loader or similar machine

The invention relates to a quick coupling device intended for fastening of attachments such as a bucket on the end of a working arm of a loader or similar machine

The invention relates to earth-moving or other equipment requiring frequent replacement of the various working bodies attached to the working equipment, in particular, excavators

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The invention relates to a safety device for high-speed towed device designed for securing the working tool at the end of the capture loader or similar machine

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Crane // 2621134

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