Bidirectional floating prepressing device

Abstract

The utility model relates to a two-way floating pre-pressing device which comprises a pressing base provided with a pressing sliding groove and a lifting hole communicated with the pressing sliding groove. The pressing blocks are movably arranged at the two ends of the pressing sliding groove and provided with driven pressing inclined faces. The floating sliding block is movably arranged in the lifting hole, two driving pressing slopes opposite to the driven pressing slopes are symmetrically arranged at the top of the floating sliding block, the pressing blocks are located on the two sides of the floating sliding block, and a sliding block is arranged at the bottom of the floating sliding block; the connecting rod is movably arranged in the lifting hole, a sliding groove parallel to the moving direction of the pressing block is formed in the top of the connecting rod, and the sliding groove is in sliding connection with the sliding block so that the floating sliding block can move in the moving direction of the pressing block; the hydraulic cylinder is arranged at the bottom of the pressing base and connected with the connecting rod. According to the bidirectional floating pre-pressing device, the floating sliding blocks pushing the pressing blocks are connected with the connecting rods through the sliding structures, so that the two pressing blocks can move in the radial direction within the set range, a certain fault-tolerant range is achieved, and the bidirectional floating pre-pressing device can be suitable for auxiliary clamping of workpieces.

Description

Technical Field

[0001] The utility model relates to a hydraulic clamp, in particular to a bidirectional floating pre-pressing device. Background Art

[0002] When clamping the workpiece from the inside, hydraulic clamps usually use a wedge structure to push two clamping blocks to clamp the workpiece from both sides of the hole or slot.

[0003] This oblique wedge clamping method can also achieve centering, but in partial assembly or fixation scenarios, it is only necessary to clamp the workpiece hole or slot without positioning to achieve auxiliary clamping. For example, when the fixture is located between two workpieces, the sides of the two workpieces are clamped. Since there is a dimensional tolerance between the two workpieces, the fixture needs to have a certain fault tolerance range to assist in clamping. At this time, the centrally symmetrical oblique wedge clamping method can only clamp the larger workpiece, resulting in the smaller workpiece being unable to be clamped. For example, when the workpiece is assisted by the workpiece hole or slot, since the workpiece uses other holes or slots for centering, it is only necessary to clamp the hole or slot. However, when the workpiece has a dimensional deviation, the center line of the fixture does not coincide with the center line of the hole movable slot. At this time, this centrally symmetrical oblique wedge clamping method cannot achieve the clamping of the workpiece. In summary, this centrally symmetrical oblique wedge clamping method cannot meet the auxiliary clamping requirements with dimensional deviations. Utility Model Content

[0004] In order to solve the problem that the above-mentioned centrosymmetrical wedge clamping method cannot meet the auxiliary clamping requirements with dimensional deviation, the utility model provides a bidirectional floating preloading device, and the specific technical solution is as follows:

[0005] A bidirectional floating pre-stressing device comprises: a clamping base, which is provided with a clamping slot and a lifting hole connected to the clamping slot; a clamping block, which is movably arranged at both ends of the clamping slot and is provided with a driven clamping inclined surface; a floating slider, which is movably arranged in the lifting hole and has two active clamping inclined surfaces symmetrically arranged on the top and opposite to the driven clamping inclined surface, the clamping block is located on both sides of the floating slider, and a sliding block is provided at the bottom of the floating slider; a connecting rod, which is movably arranged in the lifting hole and has a sliding slot parallel to the moving direction of the clamping block on the top, the sliding slot is slidably connected to the sliding block, so that the floating slider can move along the moving direction of the clamping block; and a hydraulic cylinder, which is provided at the bottom of the clamping base and connected to the connecting rod.

[0006] Preferably, the lifting hole is a rectangular hole, and the connecting rod is provided with a rectangular rod matching the lifting hole, and the rectangular rod is movably inserted into the lifting hole.

[0007] Preferably, the pressing block is provided with an insertion slope.

[0008] Preferably, the bidirectional floating pre-compression device further comprises: a limit pin, which is provided on the pressing base and movably inserted into the limit groove of the pressing block.

[0009] Preferably, the bidirectional floating pre-compression device further comprises: a spring, wherein the spring is arranged between the two pressure blocks.

[0010] Furthermore, the bidirectional floating preload device further comprises: an anti-slip rod, which is movably provided on the two pressure blocks and movably inserted into the interior of the spring.

[0011] Wherein, a avoiding groove is provided on the top of the floating sliding block, and the spring is movably inserted into the avoiding groove.

[0012] Preferably, the bidirectional floating pre-compression device further comprises: a top cover, which is arranged on the top of the pressing base and is used to close the lifting hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model provides a bidirectional floating pre-pressing device that connects the floating slider that pushes the pressure block and the connecting rod through a sliding structure, so that the two pressure blocks can move radially within a set range, have a certain fault tolerance range, and are suitable for auxiliary clamping of workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of this application;

[0016] Figure 2 is a cross-sectional view of the present application;

[0017] Figure 3 It is an assembly diagram of the pressure block, floating slider and connecting rod;

[0018] Figure 4 yes Figure 3 Front view of

[0019] Figure 5 It is a structural diagram of the connecting rod;

[0020] Figure 6 It is a structural diagram of the floating slider;

[0021] Figure 7 It is a structural diagram of the briquette;

[0022] Figure 8 is a cross-sectional view of the briquette;

[0023] Figure 9 It is a structural diagram of the compression base. DETAILED DESCRIPTION

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] like Figures 1 to 9 As shown, a bidirectional floating preloading device includes a clamping base 1, a clamping block 6, a floating slider 5, a connecting rod 4, and a hydraulic cylinder 2. The clamping base 1 is provided with a clamping chute 12 and a lifting hole 11. The clamping chute 12 is a through groove and is arranged at the top of the clamping base 1. The clamping chute 12 is arranged in the horizontal direction and is connected to the lifting hole 11 and is perpendicular to each other. The lifting hole 11 is arranged in the vertical direction, and the clamping chute 12 and the lifting hole 11 form a cross shape. There are two clamping blocks 6. The clamping blocks 6 are movable and inserted into the clamping chute 12. They are located on both sides of the lifting hole 11 and at both ends of the clamping chute 12. One end of the clamping block 6 is provided with a driven clamping inclined surface 63. The floating slider 5 is movably inserted into the lifting hole 11. The floating slider 5 is lifted and lowered along the lifting hole 11. The floating slider 5 is smaller than the lifting hole 11, so that the floating slider 5 can move within a set range along the radial direction of the lifting hole 11. Active clamping slopes 51 are symmetrically provided on both sides of the top of the floating slider 5. The two active clamping slopes 51 are respectively arranged opposite to the driven clamping slopes 63 of the two pressure blocks 6, that is, they are arranged in parallel. The active clamping slopes 51 and the driven clamping slopes 63 can slide with each other to achieve the movement and clamping of the pressure blocks 6. A sliding block 52 is provided at the bottom of the floating slider 5. The connecting rod 4 is movably socketed in the lifting hole 11. A sliding groove 42 is provided at the top of the connecting rod 4. The sliding block 52 is slidably inserted into the sliding groove 42. The direction of the sliding groove 42 is parallel to the moving direction of the pressure block 6, that is, parallel to the clamping direction of the pressure block 6, so that the floating slider 5 can move along the moving direction of the pressure block 6. The sliding block 52 can be a dovetail block or a T-shaped block, and the sliding groove 42 matches the sliding block 52. The sliding groove 42 is a T-shaped groove or a smoke groove, so that the floating slider 5 and the connecting rod 4 are not separated, and the floating slider 5 can rise and fall with the connecting rod 4. The hydraulic cylinder 2 is fixed to the bottom of the pressing base 1, and the piston rod 23 of the hydraulic cylinder 2 is connected to the bottom of the connecting rod 4.

[0026] The two pressure blocks 6 are slidably connected to the floating slider 5. The floating slider 5, via its active and passive pressure ramps 51 and 63, pushes the two pressure blocks 6 to move sideways, thereby clamping the workpiece. Because the floating slider 5 can move left and right along the clamping direction, when dimensional errors occur, the floating slider 5 and the two pressure blocks 6 can move eccentrically as a whole, achieving adaptive clamping. This addresses the problem of existing fixtures being unable to meet the auxiliary clamping requirements for dimensional deviations, enabling adaptive clamping of the workpiece as it changes.

[0027] In order to prevent the connecting rod 4 from rotating, the lifting hole 11 is a rectangular hole. The connecting rod 4 is provided with a rectangular rod 41 that matches the lifting hole 11 . The rectangular rod 41 is movably inserted into the lifting hole 11 .

[0028] In order to facilitate the insertion of the pressure block 6 into the workpiece or the insertion of the workpiece into one side of the pressure block 6, an insertion slope 61 is provided on the pressure block 6. The insertion slope 61 is arranged opposite to the workpiece loading direction and can push the pressure block 6 into the inside of the clamping groove 12.

[0029] In order to prevent the pressing block 6 from escaping from the pressing chute 12 and to confine the pressing block 6 in the pressing chute 12, the bidirectional floating preloading device further includes a limit pin, which is fixed in the pin hole 13 at the top of the pressing base 1, and the bottom of the limit pin is also located in the pressing chute 12. A waist-shaped limit groove 65 is provided on the top of the pressing block 6, and the bottom of the limit pin is movably inserted into the limit groove 65.

[0030] In order to avoid impact on the workpiece during the clamping process and to achieve the function of protecting the workpiece, the bidirectional floating pre-loading device also includes a spring 72. The spring 72 is arranged between the two pressure blocks 6. The spring 72 puts the two pressure blocks 6 in an ejected state, and then puts the pressure blocks 6 in contact with the workpiece after the workpiece is loaded. That is, after the workpiece is loaded, the pressure blocks 6 are pressed against the workpiece under the action of the spring 72.

[0031] In order to prevent the spring 72 from detaching due to compression, the bidirectional floating pre-load device also includes an anti-detachment rod 71. The two ends of the anti-detachment rod 71 are movably inserted into the anti-detachment holes 64 of the two pressure blocks 6. The anti-detachment rod 71 is also movably inserted into the inside of the spring 72. The anti-detachment rod 71 can prevent the spring 72 from arching when the spring 72 is compressed, and restrict the spring 72 between the two pressure blocks 6.

[0032] In order to make the structure compact, a relief groove 53 is provided on the top of the floating slider 5 , and the spring 72 is movably inserted into the relief groove 53 .

[0033] The bidirectional floating preloading device further includes a top cover 8 , which is fixed to the top of the pressing base 1 by screws and is located above the lifting hole 11 . The top cover 8 is used to close the lifting hole 11 and protect the internal structure.

[0034] The hydraulic cylinder 2 includes a connecting seat 21, a cylinder body 22 and a piston rod 23. The cylinder body 22 is fixed to the bottom of the connecting seat 21, the pressing base 1 is fixed to the bottom of the connecting seat 21, and the piston rod 23 is movably inserted into the cylinder body 22. The piston rod 23 is also connected to the connecting rod 4.

[0035] During operation, the workpiece is inserted into the bidirectional floating preloading device. The two pressure blocks 6 are pressed against the workpiece, and the piston rod 23 of the hydraulic cylinder 2 is extended. The piston rod 23 pushes the floating slider 5 upward through the connecting rod 4. When the floating slider 5 rises, it pushes the two pressure blocks 6 against the workpiece through the active pressing slope 51 and the passive pressing slope 63. If the two pressure blocks 6 are eccentric, the floating slider 5 and the connecting rod 4 are slidingly connected, so the pressure blocks 6 can move in the pressing direction, achieving eccentric pressing. When the workpiece is released, the hydraulic cylinder 2 drives the connecting rod 4 to descend, and the connecting rod 4 drives the floating slider 5 to descend, thereby freeing the pressure blocks 6 and allowing the workpiece to be removed.

[0036] The floating slider 5 applies pressure to the pressure block 6 through the inclined surface, and the pressure block 6 presses the workpiece. When there are differences between the workpieces on both sides, since the floating slider 5 and the connecting rod 4 are connected by sliding, the sliding of the pressure block 6 and the floating pressure block 6 adapts to the changes in the workpiece and achieves simultaneous clamping on both sides.

[0037] The bidirectional floating preloading device has a compact structure and can be used for workpieces that need to be pressed on both sides in a small space. The floating mechanism can adapt to the actual size changes of the workpiece.

[0038] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the claims of the present invention.

Claims

1. A bidirectional floating preloading device, characterized in that: include: A pressing base (1), wherein the pressing base (1) is provided with a pressing chute (12) and a lifting hole (11) communicating with the pressing chute (12); A pressing block (6), the pressing block (6) being movably arranged at both ends of the pressing chute (12) and provided with a driven pressing inclined surface (63); A floating slider (5), the floating slider (5) is movably arranged in the lifting hole (11), and two active pressing inclined surfaces (51) are symmetrically arranged on the top and are arranged opposite to the passive pressing inclined surfaces (63), the pressing blocks (6) are located on both sides of the floating slider (5), and a sliding block (52) is provided at the bottom of the floating slider (5); A connecting rod (4), the connecting rod (4) is movably arranged in the lifting hole (11), and a sliding groove (42) is provided on the top thereof, which is parallel to the moving direction of the pressing block (6), and the sliding groove (42) is slidably connected to the sliding block (52) so that the floating slider (5) can move along the moving direction of the pressing block (6); as well as A hydraulic cylinder (2) is provided at the bottom of the pressing base (1) and is connected to the connecting rod (4).

2. A bidirectional floating preloading device according to claim 1, characterized in that: The lifting hole (11) is a rectangular hole, and the connecting rod (4) is provided with a rectangular rod (41) matching the lifting hole (11), and the rectangular rod (41) is movably inserted into the lifting hole (11).

3. A bidirectional floating preloading device according to claim 1, characterized in that: The pressing block (6) is provided with an insertion inclined surface (61).

4. A bidirectional floating preloading device according to claim 1, characterized in that: The bidirectional floating pre-pressing device further comprises: a limit pin, which is arranged on the pressing base (1) and movably inserted into the limit slot (65) of the pressing block (6).

5. A bidirectional floating preloading device according to any one of claims 1 to 4, characterized in that: The bidirectional floating pre-compression device further comprises a spring (72), wherein the spring (72) is arranged between the two pressing blocks (6).

6. A bidirectional floating preloading device according to claim 5, characterized in that: The bidirectional floating pre-compression device further comprises an anti-slip rod (71), which is movably arranged on the two pressing blocks (6) and movably inserted into the interior of the spring (72).

7. A bidirectional floating preloading device according to claim 5, characterized in that: A position-avoiding groove (53) is provided on the top of the floating slider (5), and the spring (72) is movably inserted into the position-avoiding groove (53).

8. The bidirectional floating preloading device according to claim 1, characterized in that: The bidirectional floating pre-pressing device further comprises: a top cover (8), which is arranged on the top of the pressing base (1) and is used to close the lifting hole (11).

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