Die punching needle machining device convenient to install

Abstract

The utility model relates to the technical field of die punching needle machining, and discloses a die punching needle machining device convenient to install, which comprises a bottom plate, supporting legs are arranged at the front ends and the rear ends of the left side and the right side of the bottom of the bottom plate, and a U-shaped frame is arranged on the right side of the top of the bottom plate. The left side of the U-shaped frame is provided with a mounting shaft with one end extending into the U-shaped frame and movably connected with the right side of the inner wall of the U-shaped frame. According to the die punching needle machining device convenient to install, position limitation on a positioning block is relieved by pulling a pull ring upwards, at the moment, a rotary knob can be screwed to enable the positioning block to move out of the interior of a positioning groove, then a connecting block can be pulled out downwards from the interior of an installation frame, and therefore a cutting tool bit is detached; when the cutting tool bit is dismounted, the connecting block on the new cutting tool bit is inserted into the mounting frame, and then the new cutting tool bit can be fixed by reversely screwing the knob, so that the purpose of conveniently dismounting and mounting the cutting tool bit is achieved, and the cutting tool bit can be conveniently and quickly replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of mold punching needle processing, in particular to a mold punching needle processing device which is easy to install. Background Art

[0002] A punching pin refers to a metal part on a stamping die, which is installed on the stamping die to perform continuous punching, stamping and breaking operations, so that the workpiece being processed is separated or deformed to obtain the required workpiece. Punching pins of various sizes and lengths are generally made of punching pins of the same specifications and cut and polished according to the dimensions of the die drawing, so that the final product meets the requirements of the die. Therefore, a cutting processing device is usually used. However, in actual use, the existing die punching pin cutting processing device is inconvenient to disassemble the cutting head because the cutting heads on the device are mostly fixed with bolts. When the cutting head is damaged, it is not convenient to replace it quickly, which is not conducive to use. Therefore, a die punching pin processing device that is easy to install is proposed. Utility Model Content

[0003] (1) Technical problems solved

[0004] In response to the shortcomings of the existing technology, the utility model provides a mold punching needle processing device that is easy to install and has the advantages of easy disassembly and assembly of the cutting head. It solves the problem that in actual use of the existing mold punching needle cutting processing device, the cutting heads on the device are mostly fixed with bolts, which makes it inconvenient to disassemble the cutting heads. When the cutting heads are damaged, it is inconvenient to quickly replace them, which is not conducive to use.

[0005] (2) Technical solution

[0006] The cam is secured to the top of the base plate and has a locking mechanism which allows the cam to lock onto the base plate and lock the base, thereby securing the base plate against movement of the cam. The mounting block is connected, a mounting frame is provided on the right side of the bottom of the mounting block, a connecting block with one end extending to the bottom thereof is provided inside the mounting frame, a cutting head is provided at the bottom of the connecting block, a controller is provided on the left side of the L-shaped frame, a rectangular block is provided on the left side of the mounting frame, a rectangular groove is provided on the right side of the rectangular block, a second threaded rod is provided on the left side of the inner wall of the rectangular groove, a positioning groove is provided on the left side of the connecting block, a positioning block with one end threadedly connected to the outer side of the second threaded rod and the other end extending to the inside of the positioning groove is provided inside the rectangular groove, a rotating shaft with one end extending to the inside of the rectangular groove is provided at the bottom of the rectangular block, a driving bevel gear is provided at the top of the rotating shaft, a driven bevel gear is provided on the outside of the second threaded rod and is located on the left side of the positioning block and one end is meshed with the driving bevel gear, a knob is provided at the bottom of the rotating shaft, a mounting cavity is provided inside the mounting block above the rectangular block, a limiting groove is provided on the top of the positioning block and a limiting component is provided inside the mounting cavity with one end extending to the top of the mounting block and the other end extending to the inside of the limiting groove.

[0007] Preferably, the fixing assembly includes a U-shaped plate, a U-shaped plate is fixedly installed on the left side of the mounting shaft, a placement block is fixedly installed on the inner bottom wall of the U-shaped plate, a first arc-shaped groove is opened on the top of the placement block, a first anti-slip pad is fixedly installed inside the first arc-shaped groove, a clamping block located above the placement block is movably installed on the right side of the inner wall of the U-shaped plate, a second arc-shaped groove is opened at the bottom of the clamping block, a second anti-slip pad is fixedly installed inside the second arc-shaped groove, the top of the U-shaped plate is threadedly connected to a first threaded rod having one end extending into its interior and movably connected to the top of the clamping block, and a handwheel is fixedly installed on the top of the first threaded rod.

[0008] Preferably, the drive assembly includes a servo motor, and the servo motor is fixedly installed on the right side of the U-shaped frame. The output shaft of the servo motor extends to the interior of the U-shaped frame and is fixedly installed with a driving gear located below the mounting shaft, and the outer side of the mounting shaft is fixedly installed with a driven gear located inside the U-shaped frame and meshing with the driving gear at one end.

[0009] Preferably, the limiting assembly includes a slider, a slider is movably installed inside the mounting cavity, a limiting block with one end extending to the inside of the limiting groove is fixedly installed on the bottom of the slider, a pull rod with one end extending to the top of the mounting block is fixedly installed on the top of the slider, a limiting spring located on the outside of the pull rod and one end fixedly connected to the top wall of the mounting cavity is fixedly installed on the top of the slider, and a pull ring is fixedly installed on the top of the pull rod.

[0010] Preferably, a mounting hole adapted for the mounting shaft is opened on the left side of the U-shaped frame, a first bearing is fixedly mounted on the right side of the inner wall of the U-shaped frame, and the mounting shaft is rotatably connected to the right side of the inner wall of the U-shaped frame through the first bearing.

[0011] Preferably, a threaded hole adapted to the first threaded rod is opened on the top of the U-shaped plate, a second bearing is fixedly mounted on the top of the clamping block, and the first threaded rod is rotatably connected to the top of the clamping block via the second bearing.

[0012] (3) Beneficial effects

[0013] Compared with the prior art, the present invention provides a mold punching needle processing device that is easy to install and has the following beneficial effects:

[0014] The mold punching needle processing device which is easy to install drives the slider and the limit block to move upward by pulling the pull ring upward, so that the limit block is moved out of the interior of the limit groove, thereby releasing the position restriction of the positioning block. At this time, the knob can be turned to drive the rotating shaft and the driving bevel gear to rotate, and then the second threaded rod is driven to rotate through the driven bevel gear, thereby driving the positioning block to move to the left, so that the positioning block is moved out of the interior of the positioning groove, thereby releasing the fixation between the connecting block and the mounting frame. At this time, the connecting block can be pulled downward from the interior of the mounting frame to remove the cutting head, and then a new cutting head can be installed. The connecting block on the head is inserted into the interior of the mounting frame, and then the knob can be turned in the opposite direction to drive the second threaded rod to rotate in the opposite direction, thereby driving the positioning block to move to the right, so that the positioning block moves to the inside of the positioning groove, thereby fixing the connecting block and the mounting frame. When the limit groove on the positioning block moves to just below the limit block, the elastic force of the limit spring will drive the limit block to move down to the inside of the limit groove, thereby limiting the positioning block, completing the installation of the cutting head, and finally achieving the purpose of facilitating the disassembly and assembly of the cutting head, thereby facilitating the quick replacement of the cutting head. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a partial schematic diagram of a left-side sectional view of a fixing assembly of the present invention;

[0018] Figure 4 For this utility model Figure 1 Enlarged view of point B in the middle.

[0019] In the figure: 1 base plate, 2 supporting foot, 3 U-shaped frame, 4 mounting shaft, 5 fixing assembly, 51 U-shaped plate, 52 placement block, 53 first arc groove, 54 first anti-slip pad, 55 clamping block, 56 second arc groove, 57 second anti-slip pad, 58 first threaded rod, 59 handwheel, 6 driving assembly, 61 servo motor, 62 driving gear, 63 driven gear, 7 slide, 8 moving block, 9 first hydraulic cylinder, 10 L-shaped frame, 11 second hydraulic cylinder, 12 mounting block, 13 mounting frame, 14 connecting block, 15 cutting head, 16 controller, 17 rectangular block, 18 rectangular groove, 19 second threaded rod, 20 positioning groove, 21 positioning block, 22 rotating shaft, 23 driving bevel gear, 24 driven bevel gear, 25 knob, 26 mounting cavity, 27 limiting groove, 28 limiting assembly, 281 slider, 282 limiting block, 283 pull rod, 284 limiting spring, 285 pull ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4 The utility model provides a technical solution: a mold punching needle processing device that is easy to install, comprising a base plate 1, support feet 2 are fixedly installed on the front and rear ends of the left and right sides of the bottom of the base plate 1, a U-shaped frame 3 is fixedly installed on the top right side of the base plate 1, and a mounting shaft 4 with one end extending into the interior and movably connected to the right side of its inner wall is movably installed on the left side of the U-shaped frame 3. A mounting hole adapted for the mounting shaft 4 is opened on the left side of the U-shaped frame 3, and a first bearing is fixedly installed on the right side of the inner wall of the U-shaped frame 3, and the mounting shaft 4 is rotatably connected to the right side of the inner wall of the U-shaped frame 3 through the first bearing.

[0022] The left side of the mounting shaft 4 is fixedly installed with a fixing assembly 5, which includes a U-shaped plate 51, and the left side of the mounting shaft 4 is fixedly installed with a U-shaped plate 51. The inner bottom wall of the U-shaped plate 51 is fixedly installed with a placing block 52, and the top of the placing block 52 is provided with a first arc groove 53, and the inside of the first arc groove 53 is fixedly installed with a first anti-slip pad 54. The right side of the inner wall of the U-shaped plate 51 is movably installed with a clamping block 55 located above the placing block 52, and the bottom of the clamping block 55 is provided with a second arc groove 56, and the inside of the second arc groove 56 is fixedly installed with a second anti-slip pad 57. The top of the U-shaped plate 51 is threadedly connected to a first threaded rod 58 having one end extending into its interior and movably connected to the top of the clamping block 55. The top of the U-shaped plate 51 is provided with a threaded hole adapted to the first threaded rod 58. The top of the clamping block 55 is fixedly installed with a second bearing, and the first threaded rod 58 is rotatably connected to the top of the clamping block 55 through the second bearing. A handwheel 59 is fixedly installed on the top of the first threaded rod 58.

[0023] A drive assembly 6 is fixedly installed on the right side of the U-shaped frame 3, one end of which extends into the interior and is fixedly connected to the outside of the mounting shaft 4. The drive assembly 6 includes a servo motor 61. The servo motor 61 is fixedly installed on the right side of the U-shaped frame 3. The model of the servo motor 61 may be MR-J2S-10A. The output shaft of the servo motor 61 extends into the interior of the U-shaped frame 3 and is fixedly installed with a drive gear 62 located below the mounting shaft 4. A driven gear 63 is fixedly installed on the outside of the mounting shaft 4, which is located inside the U-shaped frame 3 and meshes with the drive gear 62 at one end.

[0024] A chute 7 is provided on the left side of the top of the base plate 1. A movable block 8 with one end extending to the top of the base plate 1 is installed inside the chute 7. A first hydraulic cylinder 9 is fixedly installed on the left side of the base plate 1. The model of the first hydraulic cylinder 9 can be 140L. The output end of the first hydraulic cylinder 9 extends to the inside of the chute 7 and is fixedly connected to the left side of the moving block 8. An L-shaped frame 10 is fixedly installed on the top of the moving block 8. Second hydraulic cylinders 11 are fixedly installed on both sides of the top of the L-shaped frame 10. The model of the second hydraulic cylinder 11 can be HSGF01-90. The output ends of the two second hydraulic cylinders 11 extend to L At the bottom of the frame 10, the output end of the second hydraulic cylinder 11 on the left is fixedly mounted with a mounting block 12 having one end fixedly connected to the output end of the second hydraulic cylinder 11 on the right. A mounting frame 13 is fixedly mounted on the right side of the bottom of the mounting block 12. A connecting block 14 with one end extending to the bottom thereof is movably mounted inside the mounting frame 13. A cutting head 15 is fixedly mounted on the bottom of the connecting block 14. A controller 16 is fixedly mounted on the left side of the L-shaped frame 10. The model of the controller 16 may be CPM1A-10CDR-A-V1. All electrical components appearing in the text are electrically connected to the controller 16 and 220V AC power.

[0025] A rectangular block 17 is fixedly installed on the left side of the mounting frame 13, and a rectangular groove 18 is provided on the right side of the rectangular block 17. A second threaded rod 19 is movably installed on the left side of the inner wall of the rectangular groove 18, and a third bearing is fixedly installed on the left side of the inner wall of the rectangular groove 18. The second threaded rod 19 is rotatably connected to the left side of the inner wall of the rectangular groove 18 through the third bearing. A positioning groove 20 is provided on the left side of the connecting block 14, and a positioning block 21 with one end threadedly connected to the outer side of the second threaded rod 19 and the other end extending to the inside of the positioning groove 20 is movably installed inside the rectangular groove 18. A threaded groove adapted to the second threaded rod 19 is provided on the left side of the positioning block 21. A rotating shaft 22 with one end extending to the inside of the rectangular groove 18 is movably installed at the bottom of the rectangular block 17. A driving bevel gear 23 is fixedly installed on the top of the rotating shaft 22. A driven bevel gear 24 located on the left side of the positioning block 21 and one end meshing with the driving bevel gear 23 is fixedly installed on the outside of the second threaded rod 19. A knob 25 is fixedly installed on the bottom of the rotating shaft 22.

[0026] The interior of the mounting block 12 is provided with a mounting cavity 26 located above the rectangular block 17, and the top of the positioning block 21 is provided with a limiting groove 27 located inside the rectangular groove 18. A limiting component 28 is movably installed inside the mounting cavity 26, with one end extending to the top of the mounting block 12 and the other end extending to the inside of the limiting groove 27. The limiting component 28 includes a slider 281, and a slider 281 is movably installed inside the mounting cavity 26. A limiting block 282 with one end extending to the inside of the limiting groove 27 is fixedly installed at the bottom of the slider 281, and a pull rod 283 with one end extending to the top of the mounting block 12 is fixedly installed on the top of the slider 281. A limiting spring 284 is fixedly installed on the top of the slider 281, which is located on the outside of the pull rod 283 and one end is fixedly connected to the top wall of the mounting cavity 26. A pull ring 285 is fixedly installed on the top of the pull rod 283.

[0027] When in use, one end of the punching workpiece to be processed is placed inside the first arc groove 53, and then the hand wheel 59 is turned to drive the first threaded rod 58 to rotate, thereby driving the clamping block 55 to move downward, thereby clamping the punching workpiece, and then the servo motor 61 is started by the controller 16 to drive the driving gear 62 to rotate, and then the mounting shaft 4, the fixing assembly 5 and the punching workpiece are driven to rotate as a whole through the driven gear 63, and the first hydraulic cylinder 9 is started to drive the moving block 8 and the cutting head 15 to move to the right as a whole, and at the same time, the hydraulic cylinder 9 is started. The two second hydraulic cylinders 11 drive the mounting block 12 and the cutting head 15 to move downward or upward as a whole, so that the cutting head 15 can be used to cut the punch workpiece. When the cutting head 15 is damaged, the pull ring 285 can be pulled upward to drive the slider 281 and the limit block 282 to move upward, so that the limit block 282 can be moved out of the inside of the limit groove 27, thereby releasing the position restriction of the positioning block 21. At this time, the knob 25 can be turned to drive the rotating shaft 22 and the driving bevel gear 23 to rotate, and then the driven bevel gear 24 can be used to The second threaded rod 19 is driven to rotate, thereby driving the positioning block 21 to move to the left, so that the positioning block 21 is removed from the interior of the positioning groove 20, thereby releasing the fixation between the connecting block 14 and the mounting frame 13. At this time, the connecting block 14 can be pulled downward from the interior of the mounting frame 13 to remove the cutting head 15, and then the connecting block 14 on the new cutting head 15 is inserted into the interior of the mounting frame 13. Then, the knob 25 can be turned in the opposite direction to drive the second threaded rod 19 to rotate in the opposite direction, thereby driving the positioning block 21 to move to the right, The positioning block 21 is moved to the inside of the positioning groove 20, thereby fixing the connecting block 14 and the mounting frame 13. When the limiting groove 27 on the positioning block 21 moves to the bottom of the limiting block 282, the limiting spring 284 drives the limiting block 282 to move down to the inside of the limiting groove 27 under the elastic force of the limiting spring 284, thereby limiting the positioning block 21, and completing the installation of the cutting head 15. There is no need to use external tools to disassemble and assemble the bolts, which facilitates the quick replacement of the cutting head 15 and avoids affecting the normal use of the device.

[0028] To sum up, the mold punching processing device that is easy to install drives the slider 281 and the limit block 282 to move upward by pulling the pull ring 285 upward, so that the limit block 282 moves out from the inside of the limit groove 27, thereby releasing the position restriction of the positioning block 21. At this time, the knob 25 can be turned to drive the rotating shaft 22 and the driving bevel gear 23 to rotate, and then the second threaded rod 19 is driven to rotate through the driven bevel gear 24, thereby driving the positioning block 21 to move to the left, so that the positioning block 21 is moved out from the inside of the positioning groove 20, thereby releasing the fixation between the connecting block 14 and the mounting frame 13. At this time, the connecting block 14 can be pulled downward from the inside of the mounting frame 13 to remove the cutting head 15, and then the connecting block 14 on the new cutting head 15 is inserted into the inside of the mounting frame 13, and then the knob 25 can be turned in the opposite direction to drive the second threaded rod 19 in the opposite direction. The cam 282 is then moved to the left of the cam 283 and the cam 284 is engaged with the engagement member 21. The cam 283 is engaged with the engagement member 21 and the engagement member 21 is engaged with the engagement member 21. The cam 283 is engaged with the engagement member 21 and the engagement member 21 is engaged with the engagement member 21.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold punching needle processing device that is easy to install, comprising a base plate (1), support legs (2) are provided at both the front and rear ends of the left and right sides of the bottom of the base plate (1), a U-shaped frame (3) is provided on the right side of the top of the base plate (1), a mounting shaft (4) with one end extending to the inside of the U-shaped frame (3) and movably connected to the right side of its inner wall is provided on the left side of the mounting shaft (4), a fixing component (5) is provided on the left side of the mounting shaft (4), a driving component (6) with one end extending to the inside of the U-shaped frame (3) and fixedly connected to the outside of the mounting shaft (4) is provided on the right side, a slide groove (7) is provided on the left side of the top of the base plate (1), a moving block (8) with one end extending to the top of the base plate (1) is provided inside the slide groove (7), and a first hydraulic cylinder (9) is provided on the left side of the base plate (1), and the output of the first hydraulic cylinder (9) is The output end extends to the inside of the slide groove (7) and is fixedly connected to the left side of the moving block (8); an L-shaped frame (10) is provided on the top of the moving block (8); a second hydraulic cylinder (11) is provided on both the left and right sides of the top of the L-shaped frame (10); the output ends of the two second hydraulic cylinders (11) extend to the bottom of the L-shaped frame (10); the output end of the left second hydraulic cylinder (11) is provided with a mounting block (12) whose one end is fixedly connected to the output end of the right second hydraulic cylinder (11); a mounting frame (13) is provided on the right side of the bottom of the mounting block (12); a connecting block (14) whose one end extends to the bottom of the mounting frame (13) is provided inside the mounting frame (13); a cutting head (15) is provided at the bottom of the connecting block (14); a controller (16) is provided on the left side of the L-shaped frame (10), characterized in that: A rectangular block (17) is provided on the left side of the installation frame (13), a rectangular groove (18) is provided on the right side of the rectangular block (17), a second threaded rod (19) is provided on the left side of the inner wall of the rectangular groove (18), a positioning groove (20) is provided on the left side of the connecting block (14), a positioning block (21) is provided inside the rectangular groove (18), one end of which is threadedly connected to the outer side of the second threaded rod (19) and the other end of which extends to the inside of the positioning groove (20), a rotating shaft (22) is provided at the bottom of the rectangular block (17), one end of which extends to the inside of the rectangular groove (18), and a driving shaft (22) is provided on the top of the rotating shaft (22). A bevel gear (23) is provided on the outside of the second threaded rod (19), and a driven bevel gear (24) is provided on the left side of the positioning block (21) and one end of the driven bevel gear (24) is meshed with the driving bevel gear (23). A knob (25) is provided at the bottom of the rotating shaft (22). A mounting cavity (26) is provided inside the mounting block (12) and is located above the rectangular block (17). A limiting groove (27) is provided on the top of the positioning block (21) and is located inside the rectangular groove (18). A limiting component (28) is provided inside the mounting cavity (26), one end of which extends to the top of the mounting block (12) and the other end extends to the inside of the limiting groove (27).

2. The mold punching needle processing device that is easy to install according to claim 1 is characterized in that: The fixing assembly (5) comprises a U-shaped plate (51), the left side of the mounting shaft (4) is fixedly mounted with the U-shaped plate (51), the inner bottom wall of the U-shaped plate (51) is fixedly mounted with a placement block (52), the top of the placement block (52) is provided with a first arc-shaped groove (53), the interior of the first arc-shaped groove (53) is fixedly mounted with a first anti-slip pad (54), the right side of the inner wall of the U-shaped plate (51) is movably mounted with a clamping block (55) located above the placement block (52), the bottom of the clamping block (55) is provided with a second arc-shaped groove (56), the interior of the second arc-shaped groove (56) is fixedly mounted with a second anti-slip pad (57), the top of the U-shaped plate (51) is threadedly connected to a first threaded rod (58) having one end extending into the interior thereof and movably connected to the top of the clamping block (55), and the top of the first threaded rod (58) is fixedly mounted with a hand wheel (59).

3. The mold punching needle processing device that is easy to install according to claim 1 is characterized in that: The driving assembly (6) comprises a servo motor (61), the servo motor (61) being fixedly mounted on the right side of the U-shaped frame (3), the output shaft of the servo motor (61) extending into the interior of the U-shaped frame (3) and being fixedly mounted with a driving gear (62) located below the mounting shaft (4), and a driven gear (63) located inside the U-shaped frame (3) and meshing with the driving gear (62) at one end being fixedly mounted on the outer side of the mounting shaft (4).

4. The easy-to-install mold punching needle processing device according to claim 1, characterized in that: The limiting assembly (28) includes a slider (281), the slider (281) is movably installed inside the installation cavity (26), the bottom of the slider (281) is fixedly installed with a limiting block (282) with one end extending to the inside of the limiting groove (27), the top of the slider (281) is fixedly installed with a pull rod (283) with one end extending to the top of the installation block (12), the top of the slider (281) is fixedly installed with a limiting spring (284) located outside the pull rod (283) and one end of which is fixedly connected to the top wall of the installation cavity (26), and the top of the pull rod (283) is fixedly installed with a pull ring (285).

5. The mold punching needle processing device that is easy to install according to claim 1 is characterized in that: The left side of the U-shaped frame (3) is provided with a mounting hole adapted to the mounting shaft (4); the right side of the inner wall of the U-shaped frame (3) is fixedly mounted with a first bearing; and the mounting shaft (4) is rotatably connected to the right side of the inner wall of the U-shaped frame (3) via the first bearing.

6. The mold punching needle processing device that is easy to install according to claim 2, characterized in that: A threaded hole adapted to the first threaded rod (58) is provided on the top of the U-shaped plate (51), a second bearing is fixedly mounted on the top of the clamping block (55), and the first threaded rod (58) is rotatably connected to the top of the clamping block (55) via the second bearing.

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