Tower type multi-layer hollow center hydraulic clamp

Abstract

The utility model relates to a tower type multi-layer hollow center hydraulic clamp which comprises a supporting cover plate, a positioning seat is fixed to the supporting cover plate, a positioning groove is formed in the positioning seat, the positioning seat penetrates through the positioning groove from inside to outside in any radial direction of the positioning seat, a clamping block is arranged in the positioning groove, and the clamping block is fixed to the supporting cover plate. The clamping blocks are matched with the positioning seats in a sliding mode in the penetrating direction of the positioning grooves, the number of the clamping blocks is at least three in a circumferential array mode in the axis direction of the positioning seats, driving devices for driving the multiple clamping blocks to slide in the positioning seats at the same time are arranged on the positioning seats, and the two sides, in the axis direction of the positioning seats, of the driving devices are each provided with one positioning seat. The two positioning seats and the driving device form a module, and one or more modules are arranged on the supporting cover plate. The fixing device has the effects that the long cylindrical part can be conveniently fixed, and the stability of the cylindrical part in the machining operation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of clamps, and in particular to a tower-type multi-layer hollow center hydraulic clamp. Background Art

[0002] A fixture is a device used to fix the object to be processed during the mechanical manufacturing process so that it occupies the correct position for construction or testing.

[0003] In the related art, when machining the inner hole of a workpiece with a cylindrical outer surface, a three-jaw self-centering chuck is usually used to fix the workpiece. The three jaws are generally controlled manually or pneumatically.

[0004] Regarding the above-mentioned related technologies, the universal three-jaw chuck has a longer stroke in order to adapt to parts of different diameters, and has lower stability when fixing longer parts. The inventor believes that there are defects such as cumbersome operation, low installation efficiency and poor stability. Summary of the Invention

[0005] In order to improve the stability of longer cylindrical parts during processing, the present application provides a tower-type multi-layer hollow center hydraulic clamp.

[0006] The present application provides a tower-type multi-layer hollow center hydraulic clamp adopts the following technical solution:

[0007] A tower-type multi-layer hollow center hydraulic clamp includes a support cover plate, a positioning seat is fixed on the support cover plate, a positioning groove is provided in the positioning seat, the positioning groove passes through the positioning seat from the inside to the outside along any radial direction of the positioning seat, a clamping block is provided in the positioning groove, the clamping block slides and cooperates with the positioning seat along the direction of the positioning groove, there are at least three clamping blocks in a circular array along the axis direction of the positioning seat, the positioning seat is provided with a driving device for driving multiple clamping blocks to slide in the positioning seat at the same time, and the positioning seat is provided with one on each side of the driving device along the axis direction of the positioning seat.

[0008] By adopting this technical solution, workers can use a drive device to control the simultaneous inward movement of six clamping blocks in two positioning seats to clamp cylindrical parts. The multi-point clamping design helps ensure uniform and stable clamping, which is suitable for long cylindrical parts. It helps improve the stability of such parts during processing, thereby improving the quality of the finished product.

[0009] 14. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole, the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole, the bosses comprise a through-hole, a screw bolt, and a nut.

[0010] By employing this technical solution, the pushing assembly simultaneously propels multiple pushing blocks toward the first rotating block. The first and second rotating blocks rotate relative to each other within the clamping block, causing the second rotating block and the clamping block to slide relative to each other, thereby driving the clamping block to slide within the positioning slot along the direction through which the positioning slot passes. This linkage structure allows multiple clamping blocks to slide smoothly and synchronously within the positioning seat. This design ensures coordinated movement of the multiple clamping blocks, improving clamping efficiency and precision.

[0011] Preferably, any one of the second rotating blocks is provided with a sliding pin, the axial direction of the sliding pin is parallel to the rotation axis direction between the first rotating block and the second rotating block, the sliding pin is located at the end of the second rotating block away from the first rotating block, and the two ends of the sliding pin are rotatably connected to the positioning seat along their own axial direction, and the clamping block is also provided with a sliding groove, the sliding groove passes through the clamping block along the axial direction of the sliding pin, the sliding pin is penetrated in the sliding groove, and the sliding pin slides in the sliding groove along the depth direction of the positioning groove.

[0012] By adopting this technical solution, the sliding pin design provides greater stability during the clamping block's sliding motion, preventing the block from jamming or uneven force due to friction. The sliding pin cooperates with the clamping block's sliding groove, allowing the block to slide smoothly along the depth of the positioning groove, ensuring precise operation with every operation. This helps improve the smoothness of the clamping action. Furthermore, clamping blocks with sliding grooves of different sizes can be replaced as needed. The size of the sliding groove helps limit the travel of the sliding pin, and thus the travel of the clamping block.

[0013] Preferably, the pushing assembly includes a hydraulic seat fixed between two positioning seats, the hydraulic seat and the positioning seat are coaxially arranged, a hydraulic cavity is arranged in the hydraulic seat, the hydraulic cavity is open on both sides close to the positioning seat along the axis of the positioning seat, and two piston pads are also arranged in the hydraulic cavity, the two piston pads slide along the axis of the hydraulic seat, and the hydraulic cavity on the side where the two piston pads are close to each other is connected with a liquid inlet, and the pushing block is away from the end of the piston pad.

[0014] By adopting this technical solution, workers connect the hydraulic pump to the fluid inlet and introduce hydraulic oil into the hydraulic chamber. The hydraulic oil pushes the piston pads on both sides to move simultaneously away from each other, so that the piston pads on either side push the other piston pads to move simultaneously. In this way, the clamping force is precisely controlled by controlling the hydraulic oil, and the clamping block can slide smoothly and powerfully, which helps improve operational efficiency and stability.

[0015] Preferably, a mounting plate is fixed to the side of the support cover plate facing away from the positioning seat, and the mounting plate is detachably fixed to the machine tool. Hydraulic oil circuits are provided in both the support cover plate and the mounting plate, and the hydraulic oil circuits are connected to the liquid inlet.

[0016] By adopting the above technical solution, the hydraulic oil circuit is arranged in the support cover and the mounting plate, which reduces the complex connection of external pipelines and helps to improve the portability of the installation.

[0017] Preferably, the mounting plate is provided with a zero point locator for quick and easy installation, and the mounting plate is also provided with a quick release joint, which is connected to the hydraulic oil circuit.

[0018] By adopting the above technical solution, the zero point locator and quick release connector are set to facilitate the staff to quickly install the fixture.

[0019] Preferably, a reset device for driving the first rotating block to reset is also provided in the clamping block.

[0020] By adopting the above technical solution, the reset device can quickly reset the clamp after releasing the workpiece, ensuring that the fixture is ready for the next operation. This reduces the possibility of damage to the long cylindrical part caused by the clamp not being reset when installing the long cylindrical part.

[0021] Preferably, the reset device is a reset spring, and an installation groove is provided in the middle of the positioning groove. The depth direction of the installation groove is perpendicular to the axis direction of the sliding pin, and there is a certain angle between the depth direction of the installation groove and the axis direction of the second rotating block. The axis direction of the reset spring is parallel to the depth direction of the installation groove. One end of the reset spring abuts against the bottom wall of the installation groove, and the other end abuts against the side of the second rotating block away from the pushing block.

[0022] By adopting the above technical solution, when the clamping is completed, the staff controls the pushing block to release the first rotating block and the second rotating block, and the compressed return spring pops outward, thereby pushing the second rotating block to rotate toward the side away from the first rotating block, thereby driving the connecting column between the first rotating block and the second rotating block to move toward the side close to the pushing block, so that the multiple clamping blocks move to the side away from each other, thereby releasing the processed parts.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The fixture uses multi-point synchronous clamping, with multiple clamping blocks acting on the workpiece simultaneously to achieve uniform clamping force distribution, making it suitable for precise clamping of long cylindrical workpieces. This design can improve stability during processing, help ensure the clamping effect of the workpiece, and thus improve the quality of the finished product;

[0025] 2. The clamp uses a hydraulic drive system to control the sliding of the clamping block, providing strong clamping force, and the drive device ensures the synchronous movement of the clamping block. The high efficiency of the hydraulic system enables the clamp to quickly complete the clamping and releasing action, significantly improving operational efficiency and suitable for high-intensity industrial processing scenarios;

[0026] 3. The fixture has a built-in reset device, such as a return spring, which automatically resets the clamp after the workpiece is released, reducing manual intervention and improving automation. This design not only simplifies the operation process but also ensures that the fixture is always ready for work, reducing human error and enhancing operational convenience and continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an axonometric diagram showing the overall structure of a tower-type multi-layer hollow center hydraulic clamp in an embodiment of the present application;

[0028] Figure 2 This is a cross-sectional view mainly showing the internal structure of the positioning seat and the hydraulic seat in the embodiment of the present application;

[0029] Figure 3 This is a cross-sectional view of the internal structure of the mounting plate, support cover, positioning seat and hydraulic seat in the embodiment of the present application;

[0030] Figure 4 It is an exploded view mainly showing the positioning seat and internal parts in the embodiment of the present application.

[0031] Figure numerals: 1. Support cover; 2. Positioning seat; 21. Positioning groove; 3. Clamping block; 31. Sliding groove; 32. Sliding groove; 33. Mounting groove; 4. Driving device; 41. First rotating block; 42. Second rotating block; 43. Sliding pin; 44. Rotating pin; 45. Rotating shaft; 46. Return spring; 47. Pushing block; 5. Hydraulic seat; 51. Hydraulic chamber; 52. Liquid inlet; 53. Hydraulic oil circuit; 54. Piston pad; 6. Mounting plate; 61. Zero point locator; 62. Quick release connector. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiment of the present application discloses a tower-type multi-layer hollow center hydraulic clamp.

[0034] See also Figure 1 The tower-type multi-layer hollow center hydraulic clamp includes a mounting plate 6, which is detachably fixed to the processing machine tool. A plurality of zero-point locators 61 are provided on the mounting plate 6. A support cover plate 1 is provided on one side of the mounting plate 6 in the thickness direction. The thickness direction of the support cover plate 1 is parallel to the thickness direction of the mounting plate 6. Two support cover plates 1 are provided at intervals along their own thickness direction, and the support cover plate 1 close to the side of the mounting plate 6 is fixedly connected to the mounting plate 6. A positioning seat 2 is provided between the two support cover plates 1. The axial direction of the positioning seat 2 is parallel to the thickness direction of the support cover plate 1. A clamping block 3 is provided in the positioning seat 2, and the clamping block 3 slides in the positioning seat 2 along the radial direction of the positioning seat 2. There are at least three clamping blocks 3 arrayed around the axial direction of the positioning seat 2. A hydraulic seat 5 is also provided on the side of the positioning seat 2 in the axial direction away from the mounting plate 6. A driving device 4 for simultaneously driving multiple clamping blocks 3 to move is also provided in the hydraulic seat 5 and the positioning seat 2. There are two positioning seats 2 symmetrically arranged on both sides of the axial direction of the hydraulic seat 5. The two sides of the hydraulic seat 5 are fixedly connected to the corresponding positioning seats 2. The two positioning seats 2 and one hydraulic seat 5 form a module. One or more modules can be arranged between the two support cover plates 1 according to the length of the cylindrical parts.

[0035] In actual use, a worker inserts a long cylindrical part to be machined into the fixture. By controlling the drive device 4, multiple clamping blocks 3 are simultaneously moved inward, so that the multiple clamping blocks 3 in the two positioning seats 2 are all pressed against the axial side surfaces of the cylindrical part, thereby fixing the part to be machined and the fixture relative to each other. This method of securing the part to be machined helps improve its stability during machining, thereby improving the quality of the finished product.

[0036] See also Figure 2-Figure 4A positioning groove 21 is formed on the positioning seat 2, and the positioning groove 21 passes through the positioning seat 2 in the radial direction of the positioning seat 2. The clamping block 3 is arranged in the positioning groove 21, and the clamping block 3 slides with the positioning seat 2 along the direction in which the positioning groove 21 passes. A sliding groove 31 is also formed on the clamping block 3, and the sliding groove 31 passes through the clamping block 3 along the direction in which the positioning groove 21 passes. The driving device 4 includes a first rotating block 41 and a second rotating block 42, and a pair of the first rotating block 41 and the second rotating block 42 are respectively arranged in each sliding groove 31. A rotating shaft 45 is provided at one end in the longitudinal direction of the first rotating block 41, and the axial direction of the rotating shaft 45 is parallel to the axial direction of the positioning seat 2 and the direction in which the positioning groove 21 passes. The rotating shaft 45 passes through the first rotating block 41 and the second rotating block 42 along its own axial direction, and the rotating shaft 45 is located at one end in the longitudinal direction of the second rotating block 42.

[0037] A rotating pin 44 is provided on the side of the first rotating block 41 facing away from the rotating shaft 45. The axis of the rotating pin 44 is parallel to the axis of the rotating shaft 45. The rotating pin 44 passes through the first rotating block 41 along its own axis, and both ends of the rotating pin 44 are rotatably connected to the clamping block 3.

[0038] A sliding pin 43 is also provided on the side of the second rotating block 42 facing away from the rotating shaft 45. The axis of the sliding pin 43 is parallel to the axis of the rotating shaft 45 and is pivotally connected to the second rotating block 42 along its own axis. A sliding groove 32 is also formed in the clamping block 3. The sliding groove 32 extends through the clamping block 3 along the axis of the sliding pin 43 and has a diameter greater than that of the sliding pin 43. The sliding pin 43 is inserted into the sliding groove 32 along its own axis, and its ends are pivotally connected to the two side walls of the positioning groove 21.

[0039] A pusher block 47 is also provided on the side of the first and second rotating blocks 41 and 42 facing away from the mounting plate 6. The axis of the pusher block 47 is parallel to the axis of the positioning seat 2. The pusher block 47 extends through the positioning seat along its own axis and slidably engages with the positioning seat 2. The side of the pusher block 47 facing away from the hydraulic seat 5 abuts against the side surfaces of the first and second rotating blocks 41 and 42. Multiple pushers 47 are provided, corresponding to the clamping blocks 3. A pusher assembly is housed within the hydraulic seat 5, which simultaneously propels the multiple pushers 47 on both positioning seats toward the side closest to the positioning seat 2.

[0040] See also Figure 3A hydraulic chamber 51 is formed in the hydraulic seat 5. The hydraulic chamber 51 is open on both sides of the two positioning seats 2 along the axis of the hydraulic seat 5. The pushing assembly includes two piston pads 54 arranged in the hydraulic chamber 51. Any piston pad 54 is coaxial with the hydraulic seat 5 and slides along the axis of the hydraulic seat 5. The side of any piston pad 54 facing away from the other piston pad 54 along its own axis is pressed against the side surface of the multiple pushing blocks 47 facing away from the mounting plate 6. A liquid inlet 52 is also provided in the hydraulic chamber 51. The liquid inlet 52 is located on the inner side of the hydraulic seat 5 and between the two piston pads 54. A quick-release connector 62 is also provided on the mounting plate 6 for convenient connection with the hydraulic pipeline. A hydraulic oil circuit 53 is also provided in the mounting plate 6, the support cover plate 1, and the positioning seat 2 and the hydraulic seat 5 near the side of the mounting plate 6. One end of the hydraulic oil circuit 53 is connected to the quick-release connector 62, and the other end is connected to the liquid inlet 52.

[0041] In actual operation, the operator connects the quick-release connector 62 to the hydraulic pump and pumps hydraulic oil into the hydraulic chamber 51 through the hydraulic oil line 53. The hydraulic oil pushes the two piston pads 54 to move away from each other. The two piston pads 54 push either push block 47 on the corresponding side to move away from the hydraulic seat 5.

[0042] The clamping block 3 is also equipped with a reset mechanism. A mounting groove 33 is formed in the bottom wall of the sliding groove 31. The axis of the mounting groove 33 forms a predetermined angle with the direction through which the sliding groove 31 extends, and the axis of the mounting groove 33 is perpendicular to the axis of the sliding pin 43. The reset mechanism is a reset spring 46, whose axis is parallel to the axis of the mounting groove 33. One end of the reset spring 46 abuts against the bottom wall of the mounting groove 33, and the other end abuts against the side of the first rotating block 41 facing away from the push block 47. When the push block 47 pushes the first and second rotating blocks 41, 42 away from the hydraulic seat 5, the first rotating block 41 compresses the reset spring 46. When the hydraulic pump stops applying pressure to the hydraulic chamber 51, the return spring 46 extends, thereby pushing the first rotating block 41. One end of the first rotating block 41 is rotatably connected to the clamping block 3 through the rotating column. The return spring 46 pushes the first rotating block 41 away from the side of the rotating column to move toward the side away from the return spring 46, thereby pushing the rotating pin 44 to move toward the side close to the pushing block 47, driving the corresponding clamping block 3 to move outward along the direction of the positioning groove 21, thereby completing the reset.

[0043] The operating principle of the tower-style, multi-layer hollow center hydraulic clamp in this embodiment is as follows: when the hydraulic pump is not pressurizing the hydraulic chamber 51, the multiple clamping blocks 3 on any positioning seat 2 are positioned away from each other. A worker places a long cylindrical part into the clamp and controls the hydraulic pump to introduce hydraulic oil into the hydraulic chamber 51 via the quick-release connector 62, hydraulic oil circuit 53, and fluid inlet 52. This hydraulic oil pushes the two piston pads 54 toward opposite sides. The two piston pads 54 each push the multiple pusher blocks 47 on the corresponding side away from the hydraulic seat 5. Any one of the pushing blocks 47 pushes the first rotating block 41 and the second rotating block 42 to move toward the side away from the hydraulic seat 5, and the first rotating block 41 and the second rotating block 42 rotate relative to each other. The first rotating block 41 rotates around the axis of the rotating pin 44 toward the side away from the hydraulic seat 5, and the second rotating block 42 rotates around the rotating shaft 45. At the same time, the side of the second rotating block 42 away from the first rotating block 41 slides in the clamping block 3, and the sliding pin 43 provided on the second rotating block 42 slides in the sliding groove 32. The second rotating block 42 drives the corresponding clamping block 3 to slide inward along the penetrating direction of the positioning groove 21 until the side of each clamping block 3 close to each other is pressed against the peripheral side surface of the cylindrical part, thereby fixing the cylindrical part relatively in the fixture.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A tower-type multi-layer hollow center hydraulic clamp, characterized by: The invention comprises a support cover plate (1), a positioning seat (2) is fixed on the support cover plate (1), a positioning groove (21) is provided in the positioning seat (2), the positioning groove (21) penetrates the positioning seat (2) from the inside to the outside along any radial direction of the positioning seat (2), a clamping block (3) is provided in the positioning groove (21), the clamping block (3) is slidably matched with the positioning seat (2) along the direction of penetration of the positioning groove (21), the clamping blocks (3) are arranged in a circumferential array along the axial direction of the positioning seat (2), a driving device (4) for driving multiple clamping blocks (3) to slide in the positioning seat (2) at the same time is provided on the positioning seat (2), the positioning seat (2) is provided with one on each side of the driving device (4) along the axial direction of the positioning seat (2), two positioning seats (2) and one driving device (4) form a module, and one or more modules are provided on the support cover plate (1).

2. The tower-type multi-layer hollow center hydraulic clamp according to claim 1, characterized in that: The driving device (4) includes a first rotating block (41) and a second rotating block (42) arranged in each clamping block (3), and any group of the first rotating block (41) and the second rotating block (42) are respectively connected to each other along their own length direction at one end thereof, and the end of the first rotating block (41) away from the second rotating block (42) is connected to the clamping block (3) at one end thereof, and the rotation axis (45) between the first rotating block (41) and the second rotating block (42) is parallel to the rotation axis (45) between the first rotating block (41) and the clamping block (3), and the clamping block (3) is further provided with a sliding groove (31), and the sliding groove (31) penetrates the clamping block (3) along the penetration direction of the positioning groove (21), and the first rotating block ( 41) and the second rotating block (42) are both arranged in the sliding groove (31), and one end of the second rotating block (42) away from the first rotating block (41) slides and cooperates with the sliding groove (31) along the penetrating direction of the positioning groove (21), and a pushing block (47) is further provided on the positioning seat (2), and the pushing block (47) slides and cooperates with the positioning seat (2) along the axis direction of the positioning seat (2), and a plurality of pushing blocks (47) are correspondingly provided with the clamping block (3), and a side of any of the pushing blocks (47) close to the corresponding first rotating block (41) is pressed against the side surface of the rotational connection side of the first rotating block (41) and the second rotating block (42), and the driving device (4) also includes a pushing component for simultaneously pushing the plurality of pushing blocks (47) to slide.

3. The tower-type multi-layer hollow center hydraulic clamp according to claim 2, characterized in that: A sliding pin (43) is provided on any of the second rotating blocks (42), and the axial direction of the sliding pin (43) is parallel to the direction of the rotating axis (45) between the first rotating block (41) and the second rotating block (42). The sliding pin (43) is located at the end of the second rotating block (42) away from the first rotating block (41). Both ends of the sliding pin (43) are rotatably connected to the positioning seat (2) along their own axial direction. A sliding groove (32) is also provided on the clamping block (3), and the sliding groove (32) passes through the clamping block (3) along the axial direction of the sliding pin (43). The sliding pin (43) is provided in the sliding groove (32), and the sliding pin (43) slides in the sliding groove (32) along the depth direction of the positioning groove (21).

4. The tower-type multi-layer hollow center hydraulic clamp according to claim 2, characterized in that: The pushing assembly includes a hydraulic seat (5) fixed between two positioning seats (2), the hydraulic seat (5) and the positioning seat (2) being coaxially arranged, a hydraulic chamber (51) being arranged in the hydraulic seat (5), the hydraulic chamber (51) being open on both sides close to the positioning seat (2) along the axis direction of the positioning seat (2), two piston pads (54) being further arranged in the hydraulic chamber (51), the two piston pads (54) sliding along the axis direction of the hydraulic seat (5), a liquid inlet (52) being connected in the hydraulic chamber (51) on the side close to each other, and the pushing block (47) being away from one end of the piston pad (54).

5. The tower-type multi-layer hollow center hydraulic clamp according to claim 4, characterized in that: A mounting plate (6) is also fixed to the side of the support cover (1) facing away from the positioning seat (2), and the mounting plate (6) is detachably fixed to the machine tool. A hydraulic oil circuit (53) is provided in both the support cover (1) and the mounting plate (6), and the hydraulic oil circuit (53) is communicated with the liquid inlet (52).

6. The tower-type multi-layer hollow center hydraulic clamp according to claim 5, characterized in that: The mounting plate (6) is provided with a zero point positioner (61) that is convenient for quick installation. The mounting plate (6) is also provided with a quick release joint (62), and the quick release joint (62) is connected to the hydraulic oil circuit (53).

7. The tower-type multi-layer hollow center hydraulic clamp according to claim 2, characterized in that: A reset device for driving the first rotating block (41) to reset is also provided in the clamping block (3).

8. The tower-type multi-layer hollow center hydraulic clamp according to claim 7, characterized in that: The reset device is a reset spring (46). A mounting groove (33) is provided in the middle of the positioning groove (21). The depth direction of the mounting groove (33) is perpendicular to the axial direction of the sliding pin (43). A certain angle is formed between the depth direction of the mounting groove (33) and the penetrating direction of the positioning groove (21). The axial direction of the reset spring (46) is parallel to the depth direction of the mounting groove (33). One end of the reset spring (46) abuts against the bottom wall of the mounting groove (33), and the other end abuts against the side of the second rotating block (42) away from the pushing block (47).

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