Air operated disc brake

FIELD: transport.

SUBSTANCE: invention relates to disc brake. Propose brake comprises brake external clamp (1), brake shoe linings (2) to be pressed against brake disc, one being driven by brake lever (5) that turns about clamp cam pin. Brake rod (6) abuts on the clamp from end side, said rod being connected from opposite side to lining (2) from clamp side or to guide plate (9) connected therewith. It comprises two spaced apart pressure rods (4) located in one direction connected to clamp (1) and lining (2) or to guide plate (9), and self-booster. Clamp (1) has hemisphere-shaped bearing seats (13, 15) accommodating plain bearing elements (14, 16) fitted therein for brake lever (5) and pressure rod (4) to thrust by their side bent off lining (2) against clamp (1). Brake rod (6) is coupled with lining (2) and latch.

EFFECT: perfected simple design, lower costs, longer life and higher reliability.

7 cl, 4 dwg

 

The invention relates to a pneumatic disk brake according to the restrictive part of paragraph 1 of the claims.

Such a disc brake with the possibility pneumatic actuation is known, for example from document EP 0553105 B1, and EP 1230491 B1. In the known technical solutions brake lever made on the same end as the Cam rests on the brake calliper as controvery. Due to the functional dependency a relatively large angle of rotation of the brake lever appear relatively high friction losses eccentric bearing. Therefore, to reduce use of the hemisphere of the rolling bearing, protecting around the eccentric bearing. However, the implementation of such linear guides is only possible with considerable cost of their production with correspondingly high production costs. Along with this is the bearing of course is relatively susceptible to damage, which prevents optimal lifetime.

Therefore, the above-mentioned document EP 1230491 B1 proposed to use to install the brake lever on the brake calliper exclusively bearings, different along with low production costs especially great strength. However, the coefficients of friction used it is livemix bearings many times higher than the value of the resistance to rolling bearings, which, of course, affects the production generated by the hydraulic cylinder brake braking force.

Therefore, to optimize pneumatically actuated disc brakes unpublished document DE 102008004806 proposed to equip the disc brake device of the self with the coefficient of the self-chosen so that the brake switches itself off after braking. This event provides the opportunity to make a move cylinder hydraulic brake actuator, whereby with the aid of the attached plunger can be actuated brake lever, substantially shorter, resulting in the reduction of the angle of rotation of the brake lever and, as a result, decreases the coefficient of friction slewing bearings. When the brake lever is attached to a push rod that moves upon actuation of the brake lever in the axial direction of the brake disc and attached clamping of the clamp pad brake pads to the brake disk.

For a bearing pads brake pads as well as for the implementation of the device of the self, when viewed in the direction of the circumference of the brake disc on both sides of the stock brakes are respectively push rods installed with one hand on the brake calliper, and on the other the hand connected with pad brake Shoe. In General, push rods are used when interacting with podregulirovan device for the correction due to the wear of the gap.

In the known document EP 1230491 B1 to implement the sliding bearing of the brake lever on the brake calliper provided socket bearing in the form of hemispheres, inside which are the bearing elements in the form of beads, resting, on the other hand, the brake lever. To handle nests bearing should perform the brake calliper of two parts and screw both halves of the bracket disk brake mechanism after processing.

However, this screw connection is potentially vulnerable place as the screws must accept the forces acting on the brake calliper. Perform end-to-end and threaded holes as well as the manufacturing of screws, is a factor that adversely affect the production costs of special importance, particularly when it comes to series-produced disc brakes used in large quantities products.

Therefore, the basis of the invention lies task is to improve disk brake of known type so that it is easier and more cost-effective to manufacture and to increase the duration of its operational reliability.

the same problem is solved by disc brakes, characterized by signs of paragraph 1 of the claims.

This constructive design allows you to choose the dimensions of the slots of the bearing in the form of hemispheres is so small that a suitable tool for processing, you can enter in all the brake calliper. The tools for processing, usually spindles for processing, you must enter obliquely to the axis of rotation of the brake disc. To bear the corresponding angle more limits for accurate processing it is advisable to run the back side of the bracket of the brake mechanism so that no loss of strength to provide sufficient clearance for spindles for processing.

Thanks designed in the shape of hemispheres nests bearing using a suitable tool, you can choose largely open angular position of the axis of rotation of the spindle for processing. It is particularly preferable above all when it is impossible concentric conducting spindle for processing through the back side of the bracket of the brake mechanism, because otherwise the corresponding holes unacceptably reduce its strength.

The device of the self that includes a guide plate fixed on plate brake pads, as well as the wedge system, cause the increased size of the niche Thor is oz, compared with the disk brake device without the self what contributes to the introduction of a tool for processing inside the bracket of the brake mechanism.

Instead entered obliquely spindle for processing processing nests bearing in the form of hemispheres you can also head angular milling cutter, so that the possible axial treatment slots of the bearing.

Although the size of the niche bracket disc brake mechanism, as indicated, increased due to application of the device of the self, the entire structural size of the disk brake is reduced when viewed in the direction of the axis of the brake disc, now due to the reduced stroke of the cylinder of the hydraulic brake, and a reduced angle of rotation of the brake lever.

According to a preferred variant implementation of the invention push rods, rod brakes, and podregulirovan device, including the device synchronization for synchronous podregulirovan wear push rods with the bottom sheet covering the mounting opening bracket brake mechanism,and the guide plate are combined into one structural unit.

The push rod so connected with pad brake pads, that there is a possibility for a slight rotary movement of the adjusting rod in accordance with emerging during actuation of the brake system offsets perimeter pads brake pads.

Required when servicing simple razedinennosti connection rod of the brake lining of the brake pads preferably occurs by means of a snap connection, for example, accommodated in the groove of the rod brake spring ring, completely displaced when large tensile effort required to disconnect the connection when replacing brake pads, through the annular inclined ledge in the lining of the brake pads, so both of the structural element stock brake/ plate brake pads are separated.

A groove for receiving a spring ring may be provided instead of placing it in compression rod, also in the lining of the brake pads, in particular in the base plate pads brake pads, while the annular inclined protrusion is provided in the corresponding structural element.

Necessary to disconnect the connection dilatory force much more, preferably many times, of a spring force of a return spring, to prevent unwanted separation of the connection.

Other preferred embodiments of the invention are characterized by the features of dependent claims.

The present invention is illustrated by drawings, which presents the following:

figure 1 - fragment e is ment corresponding to the invention of the disk brake in the top view;

figure 2-4 - section bracket brake mechanism during processing according to the invention.

Figure 1 shows a disk brake with samozrejme fixed on the fixed bracket 8 brake bracket 1 brake, plate 2 brake pads of the clamp and the trigger can be pressed to the brake disk. In the example of execution represented only plate 2 brake pads of the clamp.

To clamp provided with clamping device with rotary lever 5 and the rod 6 of the brake, whereby the cover plate 2 brake pads can move in the axial direction relative to the axis of rotation of the brake disk.

In addition, the device of the self with rethimnou support 10 on bearings with the appropriate pressure rod 4 which engages with podregulirovan device due to wear podregulirovan pads 2 brake pads.

Push rods 4 are fixed to their faces the cover plate 2 brake pads the final part of the guide plate 9, which can move in the bracket 8 of the brake in the direction of the clip.

Each Razina bearing 10 bearing is inserted from the end face into the corresponding push rod 4 ball 12 bearing inside with the other hand in ug is ubienii in the shape of a hemisphere pads 2 brake pads, the side wall of which is made in the form of a rising ramp 11.

During braking, when the cover plate 2 brake pads squeeze the brake lever 5 to the brake disc, there are regional efforts, by means of which the plate 2 brake pad is moved in the direction of rotation of the brake disc to change the distance of the push rod 4. When turning off the brake plate 2 brake pad returns the return spring 7, so to speak, in the unloaded initial position in which the ball 12 of the bearing is practically not functioning, contained within the recessed pads brake pads.

Brake lever 5 is made to rotate around the axis of rotation of the eccentric relative to the shaft 6 of the brake, which is formed by two spherical elements 14 of the bearing, on the one hand on the inside of the hemisphere brake, lever 5, and on the other hand - in the slots 13 of the bearing in the form of hemispheres 13 bracket 1 disk brake mechanism.

Push rods 4, located, when viewed in the direction of the circumference of the brake disc on both sides next to the stem 6 of the brakes, installed on your turned from the pad 2 brake pads front side into the slots 15 of the bearing in the form of hemispheres bracket 1 disk brake mechanism, and on the respective end sides of nimn the x rods 4 preferowan made in the form of a spherical segment element 16 of the sliding bearing, inside the slots 15 of the bearing. Instead priparkovannogo element 16 of the sliding bearing may be provided in a separate spherical element bearings, now located inside accordingly priparkovannogo deepening of the adjusting rod 4, similarly located opposite the bead 12 of the bearing on the plot Rethimno bearings 10 bearings.

Socket 13, 15 of the bearing located on the same surface of the bracket 1 of the brake mechanism, indicated on this site, such as the head bracket is installed preferably manufactured by molding the protrusions, if the bracket 1, the brake mechanism is in the form of a solid element of the casting.

Processing, respectively, in the form of semispherical recesses of the slots 13, 15 of the bearing, as shown in figure 2 and 3, can be realized by means of the tool 17 for processing with the spindle to handle 18, which is directed obliquely from below through the niche 21 of the bracket of the brake mechanism, with the head in the form of a spherical segment, with the help of which you can handle the indentation in the shape of a hemisphere sockets 13, 15 of the bearing.

The spindle 18 for processing in motion by a drive mechanism 19 and he is supported by means of the control element 20 protruding in the recess 21.

If figure 2 shows a top view in section of the brake calliper, what about the figure 3 shows a side view in section. However, in both cases, the spindle 18 to the handle 18 is introduced obliquely, which allows implementation in the form of hemispheres sockets 13, 15 of the bearing.

Another treatment option is shown in figure 4. Here as a tool for processing is provided an angular actuator 22 through which the spindle 18 for processing, you can enter coaxially. In this case, the angular actuator 22 can be entered from below through the niche 21 in the bracket 1 of the brake mechanism.

1. Pneumatic disc brake, contains a spanning disk brake bracket (1) brake lining (2) brake pads made with pressure from two sides to the brake disk, one of which is actuated by the brake lever (5)is made with the possibility of rotation around the axis of the eccentric clamping device to which is attached from the front side of the rod (6) brake attached the other side to the cover plate (2) brake pads of the clamp or connected with it the guide plate (9), two located in the same direction and in the distance the push rod (4), respectively attached to the bracket (1) the brake mechanism and the cover plate (2) brake pads or guide plate (9), and the device of the self, characterized in that the bracket (1) the brake mechanism includes a Jack (13, 15) of the bearing in the form of hemispheres, NR the three which are adjusted to them elements (14, 16) slide bearing through which the brake lever (5) and push rod (4) based its turned from the pad (2) brake pads side of the bracket (1) the brake mechanism, and the spindle brake is connected with the possibility of separation from the lining of the brake pads by means of a snap connection.

2. Pneumatic disc brake according to claim 1, characterized in that the bracket (1) the brake mechanism is made whole.

3. Pneumatic disc brake according to claim 1 or 2, characterized in that the socket (13,15) bearing made in preferowanych ledges.

4. Pneumatic disc brake according to claim 1 or 2, characterized in that the bearing made four slots (13, 15), in particular two - for brake lever (5) and respectively one for push rods (4).

5. Pneumatic disc brake according to claim 1 or 2, characterized in that related to the brake lever (5) elements (14) of the sliding bearing is made in the form of a support balls.

6. Pneumatic disc brake according to claim 1 or 2, characterized in that the elements (16) sliding push rods (4) are fulfilled by providing the spherical shape of the corresponding side of the corresponding push rod (4).

7. Pneumatic disc brake according to claim 1 or 2, characterized in that each element (16) of the bearing pressure is on rod (4) is made of the reference ball.



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Proposed mechanism comprises support surrounding brake disc and brake linings abutting on brake disc on both sides. One of said linings on clap side can be actuated by clamp rotary lever. Disc brake support flange accommodates brake cylinder secured thereto to receive compressed air. Said cylinder can act on said rotary lever by cylinder rod and has return spring. Cylinder rod is displaced by spring back into free state to abut on the flange or on bottom resting on cover flange. Said flange makes the return spring support. Cover is made of thin-wall sheet of stable-shape metal foil. Concentric hole is made in said cover. In compliance with first version, brake mechanism cylinder has said cover makes form the preassembled assy without cylinder rod. In compliance with second version, brake mechanism cylinder return spring abut on thin-wall cover abuts on brake mechanism disc flange to made its support.

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FIELD: process engineering.

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FIELD: transport.

SUBSTANCE: clamp brake is mounted at vehicle comprising body and wheel with brake surface to braking force to be applied to said wheel. Clamp brake comprises brake shoe, brake shoe holder, main clamping body, two support pins and drive. Support pins hold said holder at main clamp body to allow its displacement toward brake surface and therefrom. Drive allows pressing brake shoe to wheel brake surface by aforesaid holder. Said drive comprises diaphragm, drive pressure chamber, piston and connected gear. The latter comprises screws and screw bores made in said piston to receive screws to be screwed in through holder to attach the piston thereto.

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10 cl, 5 dwg

FIELD: machine building.

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20 cl, 12 dwg

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6 cl, 7 dwg

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10 cl, 8 dwg

FIELD: automobile production.

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16 cl, 8 dwg

FIELD: transport.

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FIELD: machine building.

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8 cl, 7 dwg

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24 cl, 1 dwg

FIELD: transport.

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25 cl, 15 dwg

FIELD: transport.

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4 dwg

FIELD: machine building.

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10 cl, 3 dwg

FIELD: transport.

SUBSTANCE: lifting machine comprises motor to drive lifting machine shaft 14. Machine brake 20 applies braking force to disc 22 coupled with machine shaft 14 to decelerate or stop said shaft. In compliance with one version, brake 20 actuates shifting element 38 to apply shifting pressure to tong-type braking mechanism to apply braking force to disc 22. Brake drive 48 with deformable material displaces to counteract shifting pressure to control adhesion between braking mechanism 32 and disc 22. Controller varies braking force applied to disc 22 to control input force on said deformable material. Position of braking element relative to rotary part is defined using material input signal magnitude.

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19 cl, 5 dwg

FIELD: transport.

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18 cl, 2 dwg

FIELD: transport.

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EFFECT: reliable braking.

18 cl, 2 dwg

FIELD: security facilities, blasting.

SUBSTANCE: invention refers to armoured machinery and can be used in chassis of military caterpillar vehicles equipped with fire protection facilities. The chassis of a military caterpillar vehicle contain a frame, a power unit, a power gear including a fan drive with a friction clutch and a cooling system with a fan, and fire protection equipment with an automatic control unit. The fan is secured on a driving hub made with a friction surface. A pressure plate is designed so as to interact with the friction surface of the driving hub. A driven hub is made as a whole with a body of a bearing and is equipped with a cartridge located in its inner cavity and able to rotate around its axis. A chamber forming container is assembled in the cartridge; and an exploder as a source of pneumatic energy is installed in the said container. At that the container is designed with an orifice hole communicating the inner cavity of the container with the chamber and rigidly connected to the driven hub. A feature of electric blasting of the charge of an explosive substance of the exploder is secured to a flange of the container. The said feature is made as a lock with a core. The core is electrically connected with the said automatic control unit, and the lock is equipped with a spring which presses the core to a detonating cap of the exploder.

EFFECT: improvement of fire extinguishing efficiency in a motor-transmission compartment of chassis of a military caterpillar vehicle with hydro mechanic transmission.

2 dwg

FIELD: transportation.

SUBSTANCE: disk brake comprises disk-stabilising elements, which are installed between every brake disk and hub or part joined to hub, without fixation and are arranged and installed with the possibility of deviation in axial direction in process of braking and creation of force that provides for axial return of brake disks in case of brakes release. Disk-stabilising element may have rectangular shape mainly, with two long sides and two short sides, by means of which short sides are installed in gaps between teeth or splines in brake disk. Disk-stabilising element may have two free lower ends, which are engaged with top of two adjacent splines or teeth of braking disk, and one upper bent end, which is engaged with base between two adjacent splines or teeth of braking disk. Disk-stabilising element may include helical spring, which is installed in braking disk gap, therefore both ends of helical spring pass radially from helical spring in opposite directions and end with brackets. Disk-stabilising element may be made of metal sheet having shape of "П"-shaped double-sided contour element with two branches, which are joined by base.

EFFECT: improved technical characteristics of disk brake, elimination of noise and jamming and exclusion of disk incline, by means of its stabilisation with the help of disk-stabilising elements.

44 cl, 42 dwg

FIELD: transport.

SUBSTANCE: invention relates to cam-driven block brakes and their components. Cam (38) has one or several ledges (62, 64) with multiple sections (62A-C, 64A-C) that feature various profiles in axial cross section. Varying the cam profile allows producing the cam with the extreme outer ends or apexes of the ledges with length exceeding that of common cams, the mechanical strength being preserved. Increased travel of brake shoes allows using brake shoe lining of increased thickness.

EFFECT: longer life of brake shoe linings.

45 cl, 11 dwg

FIELD: machine building.

SUBSTANCE: drive mechanism of disk brake of vehicle includes bracket consisting of case and cover, brake drive shaft and screw gear installed in bracket, and also lever mounted on external side of bracket on brake drive shaft. A mechanism of automatic control of the brake including a driving link is installed inside the lever. The driving link of automatic control of the brake is arranged coaxially to the brake drive shaft and is kinematically coupled with the bracket. A movable in circumferential direction packing is positioned between the bracket and a controller of the drive lever so, that internal cavities of the bracket and the lever form a common cavity sealed from the side opposite to the bracket.

EFFECT: simplification of design, raised maintainability and service life of mechanism of vehicle dick brake drive.

1 dwg

FIELD: machine building.

SUBSTANCE: drive consists of cylinder, of piston installed in cylinder, of fixing device in form of conic bushing with conic insertions arranged inside piston cavity, of un-breaking device in form of an elastic element installed between conic bushing and thrust ring movably positioned on cylinder guide, rigidly tied with cylinder, and of device for retracting piston into initial position. The elastic element of the un-breaking device is made as a compression spring. The thrust ring corresponds to press-on bush with radial orifices. The conic bushing of the fixing device is installed with a minimum clearance relative to end surface made inside the piston; the clearance ensures transfer of force of the compression spring to conic insertions. The conic insertions are movably installed in radial slots of the press-on bush and generate friction force along a cylinder guide deliberately overcoming force of the compression spring.

EFFECT: reduced axial dimensions of drive and expanded functionally of brake drive due to its application in brake systems regardless from pressure value in drain lines.

2 dwg

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