A double-cylinder asynchronous clamping device

Abstract

The utility model relates to a clamping device, in particular to a double-cylinder asynchronous clamping device, comprising two hydraulic cylinders, and further comprising: a clamping seat, on which the hydraulic cylinders are installed in parallel; a linkage device, arranged on the clamping seat; a clamping rod, arranged on the linkage device; a clamping shaft, arranged at one end of the clamping rod; and a force unloading device, arranged at both ends of the clamping shaft and connected to the hydraulic cylinders. The double-cylinder asynchronous clamping device provided by the utility model does not require synchronous control, so it has a simple structure and low cost, and at the same time has good reliability and fast running speed.

Description

Technical Field

[0001] The utility model relates to a pressing device, in particular to a double-cylinder asynchronous pressing device. Background Art

[0002] Existing double-cylinder clamping usually uses a hydraulic cylinder and is equipped with a synchronization valve. The synchronization valve allows the two hydraulic cylinders to extend or retract synchronously. Due to the configuration of the synchronization valve, the pipeline and control are more complicated and the cost is higher. Utility Model Content

[0003] In order to solve the above problems of complex pipelines and high costs, the utility model provides a double-cylinder asynchronous pressing device, and the specific technical solution is as follows:

[0004] A double-cylinder asynchronous clamping device includes two hydraulic cylinders, and also includes: a clamping seat, the hydraulic cylinders are installed in parallel on the clamping seat; a linkage device, arranged on the clamping seat; a clamping rod, arranged on the linkage device; a clamping shaft, arranged at one end of the clamping rod; and a force unloading device, arranged at both ends of the clamping shaft and connected to the hydraulic cylinders.

[0005] Preferably, the force unloading device includes: a sliding seat, movably arranged on the clamping shaft; a retaining ring, arranged on the clamping shaft and located on one side of the sliding seat, and a sliding gap is arranged between the sliding seat, the retaining ring and the clamping rod; a connecting seat, arranged in a connecting groove, the connecting groove is movably inserted into the sliding seat, and a rotation gap is arranged between the connecting groove and the bottom of the sliding seat; and a connecting shaft, arranged on the connecting seat and rotatably connected to the sliding seat.

[0006] Preferably, the linkage device includes: a linkage seat, which is arranged on the clamping seat; a lower linkage shaft, which is arranged at the bottom of the clamping seat; two linkage plates, which are symmetrically arranged on both sides of the linkage seat and one end is rotatably mounted on the lower linkage shaft; and an upper linkage shaft, which is arranged at the top of the clamping seat and is rotatably connected to the other end of the linkage plate and is also arranged on the clamping rod.

[0007] Preferably, it further comprises a pressing plate, wherein the pressing plate is fixed to the end of the pressing rod.

[0008] Furthermore, it also includes pressing blocks, which are arranged at both ends of the pressing plate.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The double-cylinder asynchronous pressing device provided by the utility model does not need synchronous control, so it has a simple structure and low cost, and at the same time has good reliability and high operating speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a stereogram of the first viewing angle of this application;

[0012] Figure 2 It is a stereogram of the second viewing angle of the present application;

[0013] Figure 3 is a front view of the present application;

[0014] Figure 4 is a side view of the present application;

[0015] Figure 5 It is a top view of the present application. DETAILED DESCRIPTION

[0016] The utility model is now further described with reference to the accompanying drawings.

[0017] like Figures 1 to 5 As shown, a double-cylinder asynchronous clamping device includes a hydraulic cylinder 6, a clamping seat 1, a linkage device 2, a clamping rod 3, a clamping shaft 7 and a force unloading device 5. The top of the clamping seat 1 is equipped with a linkage device 2, and the linkage device 2 is connected to the clamping rod 3. One side of the clamping seat 1 is equipped with a hydraulic cylinder 6, and two hydraulic cylinders 6 are symmetrically arranged. The piston rod of the hydraulic cylinder 6 is connected to the force unloading device 5. The force unloading device 5 is also installed at both ends of the clamping shaft 7, and the clamping shaft 7 is connected to one end of the clamping rod 3.

[0018] The linkage device 2 includes a linkage seat 21, a lower linkage shaft 23, a linkage plate 22 and an upper linkage shaft 24. The linkage seat 21 is fixed on the top of the clamping seat 1. The top and bottom of the linkage seat 21 are respectively provided with an upper linkage shaft 24 and a lower linkage shaft 23. The linkage plate 22 is symmetrically located on both sides of the linkage seat 21, and both ends are rotatably connected to the upper linkage shaft 24 and the lower linkage shaft 23 respectively.

[0019] The unloading device 5 includes a sliding seat 51, a retaining ring 55, a connecting seat 53 and a connecting shaft 54. The sliding seat 51 is movably mounted on both ends of the clamping shaft 7. The retaining ring 55 is mounted on both ends of the clamping shaft 7 and is located on the outside of the sliding seat 51. A first sliding gap D1 is provided between the sliding seat 51 and the retaining ring 55. A second sliding gap D2 is provided between the sliding seat 51 and the clamping rod 3. Both D1 and D2 are not less than 2.5 mm. The bottom of the connecting seat 53 is connected to the piston rod of the hydraulic cylinder 6. The top of the connecting seat 53 is provided with a connecting groove 531. The sliding seat 51 is movably inserted into the connecting groove 531 and is rotatably connected with the connecting shaft 54. The two ends of the connecting shaft 54 ​​are fixed on the connecting seat 53 and pass through the connecting groove 531. The connecting shaft 54 ​​is also located below the clamping shaft 7. A rotation gap D3 is provided between the connecting groove 531 and the bottom of the sliding seat 51. D3 is not less than 1 mm, so that the sliding seat 51 has a certain rotation range.

[0020] In order to facilitate the clamping of the workpiece, a clamping plate 41 is installed at the end of the clamping rod 3, and a clamping block 42 can also be installed at both ends of the clamping plate 41. The clamping block 42 is used to clamp the workpiece. The clamping plate 41 and the clamping block 42 are convenient to adjust according to different workpieces, thereby improving versatility.

[0021] The hydraulic cylinder 6 presses the workpiece via the pressure plate 41 .

[0022] The two hydraulic cylinders 6 are identical hydraulic cylinders 6 , and the two hydraulic cylinders 6 can provide a greater pressing force.

[0023] During operation, when the piston rod of the hydraulic cylinder 6 is extended or retracted, the clamping shaft 7 is tilted because the two hydraulic cylinders 6 are not synchronized. At this time, the sliding seat 51 is connected to the connecting seat 53 through the connecting shaft 54, and there is a sliding gap on both sides of the sliding seat 51. Therefore, the sliding seat 51 can move in the tilting direction of the connecting shaft 54. At the same time, the sliding seat 51 rotates around the connecting shaft 54, offsetting the radial force of the piston rod generated by the tilt of the clamping shaft 7, thereby protecting the piston rod and preventing the piston rod from breaking. At the same time, it balances the asynchronism of the two hydraulic cylinders 6, making the two hydraulic cylinders 6 nearly synchronously extended and retracted without the need for a synchronization valve, thereby solving the problem that the two hydraulic cylinders 6 cannot be synchronized without a synchronization valve, simplifying the overall structure and control, and reducing costs.

[0024] The force unloading device 5 and the linkage device 2 are not hinged, so point contact and line contact are avoided, and the force bearing strength is good and the wear resistance is good.

[0025] The dual-cylinder structure exerts force simultaneously, avoiding the need for large oil cylinders and making the entire system run faster.

[0026] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A dual-cylinder asynchronous clamping device, comprising two hydraulic cylinders (6), characterized in that: Also includes: A pressing seat (1), wherein the hydraulic cylinders (6) are installed in parallel on the pressing seat (1); A linkage device (2) is arranged on the pressing seat (1); A pressing rod (3) is arranged on the linkage device (2); A clamping shaft (7) is arranged at one end of the clamping rod (3); and The force unloading device (5) is arranged at both ends of the clamping shaft (7) and is connected to the hydraulic cylinder (6).

2. A dual-cylinder asynchronous pressing device according to claim 1, characterized in that: The force unloading device (5) comprises: A sliding seat (51) movably disposed on the pressing shaft (7); A retaining ring (55) is arranged on the clamping shaft (7) and is located on one side of the sliding seat (51), and a sliding gap is arranged between the sliding seat (51), the retaining ring (55) and the clamping rod (3); A connecting seat (53) is arranged in a connecting groove (531), wherein the connecting groove (531) is movably inserted into the sliding seat (51), and a rotation gap is arranged between the connecting groove (531) and the bottom of the sliding seat (51); and The connecting shaft (54) is disposed on the connecting seat (53) and is rotatably connected to the sliding seat (51).

3. A dual-cylinder asynchronous pressing device according to claim 1, characterized in that: The linkage device (2) comprises: A linkage seat (21) is arranged on the pressing seat (1); A lower linkage shaft (23) is arranged at the bottom of the pressing seat (1); Two linkage plates (22) are symmetrically arranged on both sides of the linkage seat (21), and one end of the two linkage plates is rotatably mounted on the lower linkage shaft (23); and The upper linkage shaft (24) is arranged on the top of the clamping seat (1), is rotatably connected to the other end of the linkage plate (22), and is also arranged on the clamping rod (3).

4. A dual-cylinder asynchronous pressing device according to claim 1, characterized in that: It also comprises a pressing plate (41), wherein the pressing plate (41) is fixed on the end of the pressing rod (3).

5. A dual-cylinder asynchronous pressing device according to claim 4, characterized in that: It also includes pressing blocks (42) which are arranged at both ends of the pressing plate (41).

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