Hydraulic clamping device

FIELD: machine building.

SUBSTANCE: hydraulic clamping device comprises a clamp set on a support inside a frame to which a hydraulic cylinder casing is rigidly fixed, the hydraulic cylinder includes a piston and is capable of producing force directed along the longitudinal axis of the hydraulic cylinder and applied to the clamp. An intermediate component is adjacent to the hydraulic cylinder piston and the clamp, one of its ends is fitted by a spherical end section included in the spherical support set in the piston.

EFFECT: reducing forces applied to hydraulic cylinder piston and pushing the clamp in the directions different from the hydraulic cylinder longitudinal axis.

8 cl, 6 dwg

 

The technical field

The invention relates to a hydraulic push-on device. More specifically, it relates to a hydraulic push-on device with clip placed on a support inside the frame, to which is rigidly attached to the housing of the hydraulic cylinder, is made with the possibility of creating efforts directed along the longitudinal axis of the cylinder and applied to the clip.

The level of technology

To isolate the cylinder from the forces acting perpendicular to its piston and in the direction of movement of the piston, usually the body of the hydraulic cylinder attached to the frame via a pivoting connection. In a typical embodiment, the connection of this type provide the ability to rotate, at least around two axes and, respectively, occupy a relatively large volume.

While there are variations of the hydraulic rams require that the cylinder was at least partially embedded in the frame. This may impose restrictions on the permissible diameter of the cylinder and, consequently, require the application of the pressure booster to develop enough pressure. In addition, the built-in hydraulic cylinders may impede the flow to the pipes.

A hydraulic cylinder mounted on the supports associated with the frame, require the submission to him of hydraulic fluid under pressure through a flexible pipe,such as a hose, or through a flexible coupling. Hoses and movable mates are components, which can lead to leaks.

Disclosure of inventions

The problem solved by the invention, consists in the removal or weakening at least one of the disadvantages inherent in the prior art.

According to the invention this problem is solved by the characteristics disclosed in the following description and in the accompanying claims.

In the hydraulic clamping device according to the invention the clamp is installed on the support inside the frame and the housing of the hydraulic cylinder is rigidly attached to the frame. The cylinder is made with the possibility of creating efforts directed along its longitudinal axis and affixed to the clamp. Hydraulic clamping device characterized by the fact that the piston of the hydraulic cylinder is isolated from the clamp in relation to forces acting perpendicular to the specified longitudinal axis.

Thus, forces acting on the clip in directions other than the direction of the longitudinal axis of the cylinder, is transmitted to the piston of the hydraulic cylinder only to a limited extent. Thereby eliminating the need to make the piston rod is capable of withstanding a bending moment, which significantly simplifies the design of the cylinder.

Bearing clamp inside the frame can be formed, for example, rail or swivel the support.

Guide or roller bearing is such that it could withstand the forces acting on the clip in directions other than the direction of the longitudinal axis of the cylinder. Guide may contain several interacting guide surfaces, which allow movement of the clamp in one direction. Swivel bearing can, for example, contain the axis with the associated support.

The hydraulic cylinder may be connected to the clamp by means of an intermediate component, which may be provided with a pivot bearing, on at least one of its end sections. The pivot bearing can be spherical part.

The intermediate component may be configured to transmit the force between the piston and the clamp in the first direction, and may be a finger, made with the possibility to transfer the force between the piston and the clamp in a second, opposite direction. Alternatively, the clamp can be squeezed in the direction of the cylinder, for example, by means of a spring.

Thus, the connection between the piston and the intermediate component, and between the clamp and the intermediate component can be implemented without the use of complex structural elements, since the force transmitted through the intermediate component (s) which corresponds only to a compressive force.

As an example, the finger may be in the form of a bolt, which passes through the clamp and the intermediate component and is included in the piston. Thanks to this performance is the finger pulls the clamp, when the piston moves in its negative direction. It is desirable to provide radial clearance between the pin and clip, and an intermediate component to have a slight radial displacement of the clamp, and an intermediate component that does not lead to action on the finger bending effort.

You can use several interactive terminals associated with their cylinders. This embodiment is desirable, for example, with respect to the clamping of the pipe, the diameter of which from time to time changes.

Guides, interacting with clip, can be rigidly attached to the frame to ensure a stable and relatively compact design.

The direction of movement of the clamp may essentially coincide with the direction of movement of the piston. Using essentially coincident directions of movement avoids the use of connecting links. It is desirable that the cylinder was affected by the clamp through a single intermediate component.

The body of the cylinder may protrude from the sides of the frame, i.e. to be outside it, for example, being con is captive to the frame by its flange. As a consequence, the framework does not restrict the possible diameter of the cylinder, and there are no obstacles to the filing of the cat pipe to the cylinder.

Hydraulic clamping device according to the invention is particularly effective for use in power vise to clamp the tube on its outer surface. The diameter of the cylinder may be selected depending on the desired clamping force and the available pressure of the hydraulic fluid, while providing a compact and durable design.

Brief description of drawings

Next, as an example, will be described a preferred variant of the invention with reference to the accompanying drawings.

Figure 1 is a hydraulic clamping device according to the invention are presented in the form of the plan.

Figure 2 clamping device of figure 1 presents the side view.

Figure 3 clamping device of figure 1 shows, in enlarged scale, the section plane II-II (see figure 2).

Figure 4 clamping device of figure 1 shows, in enlarged scale, the section plane Ia-Ia (see figure 1).

Figure 5 clamping device of figure 1 shows, in enlarged scale, the section plane Ib-Ib (see figure 1).

Figure 6 in a perspective image shows the clamp.

The implementation of the invention

The drawings show a hydraulic clamping device is istwo 1 in the form of a power grip, with frame 2, provided with guides 4.

The clamp 6 is mounted for movement along the guide rails 4 and provided with a sponge 8, is turned to clamp the pipe 10. The clamp 6 is made with the possibility of interaction with adjacent terminals 6. To do this, one side attached to the fork with the recess 12 between its teeth (see Fig.6), while on the opposite side of the clamp formed by the shoulder 14. With the mutual movement of the clamps 6, the neck 12 is for receiving the shoulder 14 adjacent clamp 6.

On the side of the clamp 6, opposite the sponge 8 formed facing outward spherical bulge 16, a part corresponding in shape to the spherical recess 18, is made in the intermediate component 20 (see figure 3 and 4). On the opposite end of the intermediate component 20 has a spherical end section 22, part spherical bearing (spherical bearing) 24.

The hydraulic cylinder 26 is rigidly attached to the frame 2 with its flange 28. Inside the housing 30 of the cylinder 26 is a piston 32 with his rod 34. The rod 34 of the piston takes place, can travel through the end wall 36 of the cylinder. Seal, which is provided with a hydraulic cylinder, not shown.

The bulge 16, the intermediate component 20 and the spherical bearing 24 is located in the Central channel 38, made in the rod 34 of the piston, and hermetically isolated from the outside p is stranstvo through seal 40, located between the piston rod 34 of the piston and the clamp 6. Spherical bearing 24 rests on the bottom of the channel 38.

The longitudinal axis 42 of the cylinder 26, essentially coincides with the direction of movement of the clip 6.

The finger 44 in the form of a bolt passes through the clamp 6, the intermediate component 30 and the support 24 and enters a threaded hole 46 made in the piston 32. Thanks to this performance, the finger 44 is capable of pulling the clamp 6, when the piston 32 is moved in its negative direction. Between the finger 44 and the clamp 6, and between the finger 44 and the intermediate component 20 has a radial clearance.

Hydraulic fluid under pressure is fed in the usual way to the ports 48 of the hydraulic cylinder 26.

In this embodiment, the clamping device 1 comprises three clamp 6 with the associated hydraulic cylinders 26, and all the clamps and cylinders are made as described above.

When you need to clamp the tube 10, each piston 32 moves in the positive direction, which through a suitable support 24, the intermediate component 20 and the clamp 6 is transmitted to the jaws 8, which move all the way into the pipe 10.

Clamping force is transferred from the jaws 8 corresponding piston 32, while efforts in other directions that are tangent to the pipe 10, are perceived through the clamps 6 guides 4, and efforts in the direction of the pipe axis 10 of identify what supports are stated 50, defined between adjacent terminals 6 and between the terminals 6 and the frame 2.

1. Hydraulic clamping device (1) with clamp (6)mounted on a support inside the frame (2)to which is rigidly attached to the housing of the hydraulic cylinder (26)having a piston (32) and is made with the possibility of creating efforts directed along the longitudinal axis (42) of the cylinder (26) and applied to the clamp (6), characterized in that the piston (32) of the cylinder and clamp (6) adjoins the intermediate component (20), one end of which has a spherical end section (22), which is spherical support (24)in the piston (32).

2. Clamping device according to claim 1, characterized in that the bearing clamp (6) inside the frame includes a guide (4).

3. Clamping device according to claim 1, characterized in that the piston (32) is made with the rod (34), and the intermediate component (20) and a spherical bearing (24) is located in the Central channel (38), made in the rod (34) of the piston.

4. Clamping device according to claim 1, characterized in that the finger (44)passing through an intermediate component (20), connected at their respective end parts with the piston (32) and clamp (6).

5. Clamping device according to claim 1, characterized in that it contains several interactive terminals (6)associated with their cylinders (26).

6. Clamping device according to claim 1, characterized in that the direction of the Commissioner, (4), interacting with clip (6)rigidly attached to the frame (2).

7. Clamping device according to claim 1, characterized in that the direction of movement of the clamp (6)essentially coincides with the direction of movement of the piston (32).

8. Clamping device according to claim 1, characterized in that the housing (30) of the cylinder is outside of the frame (2).



 

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