Equidistant cutting mechanism for transfer paper

Abstract

The utility model relates to an equidistant cutting mechanism for transfer paper, which comprises a support pedestal, the upper end of the support pedestal is provided with a positioning rod and a driven rod, the lower end of the positioning rod is provided with a plurality of follow-up rods in parallel from front to back through a positioning piece, one axial end of each follow-up rod is fixedly connected with the driven rod, and the other axial end of each follow-up rod is rotatably connected with a cutting wheel. The vertical height of the cutting wheel can be changed by vertically moving the driven rod. Meanwhile, a follow-up ring and a driving shaft are arranged above the supporting pedestal side by side up and down, and the transfer paper is located between the follow-up ring and the driving shaft. Therefore, the driving mechanisms are arranged on one side of the positioning rod and one side of the follow-up ring, and the multiple driving mechanisms are arranged in a linkage mode, so that separation of the cutting wheel, the follow-up ring and the transfer paper is achieved synchronously, and adjustment of the transfer paper is completed. Compared with a device in the prior art, the device has the advantages that the operation steps are fewer, the error rate is lower, and the accommodating degree of operators is higher. And meanwhile, the device adopts a pure mechanical structure linkage arrangement, so that the maintenance cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of transfer paper cutting devices, in particular to a transfer paper equidistant cutting mechanism. Background Art

[0002] When the transfer paper is rolled up, it is generally rolled into a roll. Before rolling up, the transfer paper needs to be cut in the width direction through a cutting mechanism, that is, through the relative movement between the cutting wheel and the transfer paper. The transfer paper is usually cut into 4 pieces of paper of the same width.

[0003] At the same time, in addition to the raw material roller for winding up the transfer paper to be processed and the storage roller for winding up the processed transfer paper, the prior art device generally also includes a driving shaft and a follower shaft. The middle section of the transfer paper is located between the driving shaft and the follower shaft, and the driving shaft is in contact with the follower shaft and the upper and lower ends of the transfer paper. The relative movement between the driving shaft and the follower shaft provides thrust for the transfer paper to prevent the transfer paper from being pulled and damaged during movement.

[0004] In the prior art device, if the transfer paper is tilted or wrinkled during processing, the follower shaft and the cutting wheel need to be raised upwards, mainly because both the cutting wheel and the follower shaft need to abut against the transfer paper during processing to play their role. During maintenance, if the abutment state is still maintained, the operator cannot move and adjust the transfer paper.

[0005] In the prior art device, the follower shaft and the cutting wheel are generally adjusted separately through a lead screw or a cylinder, which requires the operator to perform multiple operations and confirm the adjustment parameters multiple times, which is difficult for some operators with poor abilities to complete.

[0006] Therefore, we believe that there is a need for a transfer paper equidistant cutting mechanism that can complete the position adjustment of the cutting wheel and the follower shaft in a linked manner and reduce the requirements on the operator. Summary of the invention

[0007] In view of the deficiencies in the prior art, the utility model proposes a transfer paper equidistant cutting mechanism, which has the advantage of low requirements on operators and solves the shortcomings of the prior art devices that require operators to perform multiple operations and multiple confirmations of the operation results, which are difficult for operators to complete.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A transfer paper equidistant cutting mechanism comprises a support base, wherein a front-rear axial follower roller and a driving roller are respectively arranged on the left and right sides of the support base, a transfer paper is arranged between the follower roller and the driving roller, and two ends of the transfer paper are respectively wound around the side ends of the follower roller and the driving roller, a follower rod and a positioning rod are arranged on the upper end of the support base, and a plurality of follower rods are arranged in parallel from front to back through a plurality of positioning members at the lower end of the positioning rod, one axial end of each of the follower rods is rotatably connected to a cutting wheel, and the other axial end of each follower rod slides with the follower rod The cutting wheel and the driven rod are respectively located on the left and right sides of the positioning rod, and two front-to-rear axial driving shafts and follower rings are arranged in parallel on the upper end of the support base, wherein the driving shaft is rotatably connected to the support base, and the inner side of the follower ring is rotatably connected with the follower shaft, the transfer paper is located between the follower ring and the driving shaft, and the upper and lower ends of the transfer paper are respectively in contact with the follower ring and the driving shaft, and a driving mechanism is arranged on one side of the driven rod and one side of the follower shaft, and the driving mechanism includes upper and lower axial screws, and a plurality of screws are linked by a conveyor belt I.

[0010] Preferably, a fixed shell is sleeved on the outer side of each screw rod, the screw rod is rotatably connected to the fixed shell rod, and the fixed shell rod is fixedly connected to the support base, the positioning rod and the front and rear ends of the follower shaft are provided with internal threaded holes I for the screw rod, the positioning rod and the follower shaft are threadedly connected to the screw rod through the internal threaded holes I, and the lower end of each screw rod is coaxially fixedly connected with a transmission wheel I, and a conveyor belt I is sleeved on the outer side of the transmission wheel I corresponding to the positioning rod and the transmission wheel I corresponding to the follower shaft.

[0011] Preferably, each positioning rod and each follower shaft are respectively provided with a driving mechanism at the front and rear ends, and the lower ends of the screws located on both sides of the positioning rods are coaxially fixedly connected with a transmission wheel II, and a conveyor belt II is sleeved on the outer sides of the two transmission wheels II.

[0012] Preferably, a plurality of support members are arranged in parallel from front to back on the upper end of the support seat, the plurality of support members correspond to the plurality of cutting wheels one by one, and a dovetail groove is provided on each support member running through the left and right sides.

[0013] Preferably, each of the supporting members and each of the positioning members is penetrated by a through hole and an internal threaded hole II, a limit rod is commonly inserted into the multiple through holes with overlapping central axes, the limit rod is fixedly connected to the support base, and a positioning rod is commonly inserted into the multiple internal threaded holes II with overlapping central axes, the positioning rod is a bidirectional screw structure, and there are three positioning members, and the positioning rods are threadedly connected to the corresponding positioning members and supporting members through external threads.

[0014] Preferably, each of the positioning rods is fixedly connected to the support base, and a transmission wheel III is coaxially fixedly connected to the side end of each positioning rod, and the two transmission wheels III are linked by a conveyor belt III.

[0015] Preferably, the drive shaft and the outer side of the follower ring are coaxially fixedly connected with a damping ring made of rubber material, and a longitudinal anti-skid groove is circumferentially provided on the outer side of the damping ring.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model uses a positioning member to cooperate with a positioning rod so that when the driven rod moves downward, the cutting wheel can move upward and separate from the transfer paper. Therefore, in practice, the device only needs to control the rotation of a single screw rod, and the cutting wheel, the driven shaft and the transfer paper can be separated synchronously to complete the adjustment of the transfer paper. That is, compared with the prior art device, the device has fewer operating steps, a lower error rate, and a higher operator tolerance. At the same time, the device adopts a purely mechanical structure linkage setting, and the maintenance cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the position relationship between the drive shaft and the follower roller of the utility model;

[0020] Figure 3 It is a schematic diagram of the position relationship of multiple follower rods of the utility model;

[0021] Figure 4 This is a schematic diagram of the position relationship between the follower ring and the drive shaft of the utility model;

[0022] Figure 5 This is a schematic diagram of the connection between the positioning member and the follower shaft of the utility model;

[0023] Figure 6 It is a schematic diagram of the overall structure of the driving mechanism of the utility model.

[0024] In the figure: 1. support base; 2. driving roller; 3. transfer paper; 4. limiting rod; 5. positioning rod; 6. damping ring; 7. follower roller; 8. transmission wheel III; 9. conveyor belt III; 10. through hole; 11. follower rod; 12. support member; 13. dovetail groove; 14. cutting wheel; 15. internal threaded hole I; 16. driven rod; 17. driving shaft; 18. internal threaded hole II; 19. positioning member; 20. screw; 21. transmission wheel II; 22. conveyor belt II; 23. mounting shell; 24. transmission wheel I; 25. conveyor belt I; 26. follower ring; 27. follower shaft. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Please refer to Figure 1-6 A transfer paper equidistant cutting mechanism is consistent with the prior art device, which includes a support base 1 that plays a main supporting role, and the left and right sides of the support base 1 are respectively provided with a front and rear axial follower roller 7 and a driving roller 2.

[0028] It should be noted that, in practice, the transfer paper 3 to be processed is rolled up and wound around the follower roller 7, and the processed transfer paper 3 is rolled up and wound around the driving roller 2. Therefore, a gear or a similar transmission mechanism is generally provided on one side of the driving roller 2 to cooperate with the driving motor to realize the spontaneous rotation of the driving roller 2 and complete the transfer process of the transfer paper 3.

[0029] Furthermore, in order to avoid the transfer paper 3 being pulled when the driving roller 2 rotates due to distance problems and causing damage to the transfer paper 3, the device is rotatably connected to a front-to-back axial drive shaft 17 at the upper end of the support base 1 close to the follower roller 7, and a front-to-back axial follower ring 26 is arranged in parallel on the upper side of the drive shaft 17. By constraining the follower ring 26 to abut against the drive shaft 17, and the transfer paper 3 is located between the follower ring 26 and the drive shaft 17, the transfer paper 3 can obtain a thrust to move toward the driving roller 2, thereby avoiding the transfer paper 3 from being damaged due to excessive pulling force.

[0030] It should be noted that in order to enable the drive shaft 17 to provide thrust for the transfer paper 3 during rotation, that is, to realize the spontaneous rotation process of the drive shaft 17, in practice, a gear or a similar transmission mechanism should be provided on one side of the drive shaft 17 in conjunction with the drive motor to realize the spontaneous rotation of the drive roller 2.

[0031] It should be noted that, since the transfer paper 3 is closely attached to the drive shaft 17 and the follower ring 26, the friction force can be used to drive the transfer paper 3 to move during the rotation of the drive shaft 17, and the movement of the transfer paper 3 will drive the follower ring 26 to rotate. During the rotation of the follower ring 26, it can only ensure that it is in contact with the transfer paper 3, and it can also avoid the transfer paper 3 from being blocked due to excessive friction.

[0032] Furthermore, the device has a damping ring 6 made of rubber coaxially fixedly connected to the outside of the driving shaft 17 and the follower ring 26, and the deformable property of rubber itself can fully ensure the abutment effect between the driving shaft 17, the follower ring 26 and the transfer paper.

[0033] Furthermore, a longitudinal anti-slip groove is provided on the outer circumference of the damping ring 6 so as to increase the driving force exerted by the driving shaft 17 on the transfer paper 3 .

[0034] At the same time, the device is provided with a driving mechanism on one side of the follower ring 26 for changing the height of the follower ring 26, so that the operator can ensure that the driving shaft 17 is in contact with the follower ring 26 and the transfer paper 3 during processing, and when problems occur at the processing site, even if the distance between the follower ring 26 and the driving shaft 17 is adjusted, the operator can directly adjust the transfer paper 3 to avoid the transfer paper 3 being unable to be adjusted due to the pressing force applied by the follower ring 26 and the driving shaft 17 on the transfer paper 3.

[0035] Specifically, in order to realize the cutting process of the transfer paper 3, the device is connected with multiple cutting wheels 14 that rotate in parallel from front to back near the upper end of the support base 1 and the driving roller 2, and utilizes the structural characteristics of the cutting wheel 14 itself and the pressure cutting force to realize the cutting of the transfer paper 3.

[0036] Furthermore, the device is provided with a plurality of support members 12 arranged in parallel from front to back at the upper end of the support base 1, and the plurality of support members 12 correspond one to one with the plurality of cutting wheels 14, and each support member 12 is provided with a dovetail groove 13 running through the left and right sides, so that the lower end of the cutting wheel 14 can be embedded in the corresponding dovetail groove 13, thereby further increasing the pressing and cutting force applied by the cutting wheel 14 on the transfer paper 3.

[0037] At the same time, during normal use of the device, it is necessary to ensure that the cutting wheel 14 is in contact with the transfer paper 3 to ensure the pressing effect. However, when problems occur at the processing site, the operator is required to adjust the transfer paper 3. The operator needs to move the cutting wheel 14 upward to avoid the cutting wheel 14 embedded in the transfer paper 3 hindering the movement of the transfer paper 3.

[0038] Specifically, the device is provided with a front-to-rear axial positioning rod 5 at the upper end of the support base 1 , and a plurality of positioning members 19 are equidistantly arranged on the outer side of the positioning rod 5 from front to back, and the plurality of positioning members 19 correspond one-to-one to the plurality of cutting wheels 14 .

[0039] Therefore, by rotating the follower rod 11 connected to the lower end of the positioning member 19, one axial end of the follower rod 11 is constrained to the corresponding cutting wheel 14 so that the device can change the height of the cutting wheel 14 by rotating the follower rod 11, thereby changing the abutment relationship between the remaining transfer papers 3.

[0040] Specifically, in order to control the rotation angle of the follower rod 11, the device is provided with a follower rod 16 at the upper end of the support base 1, the follower rod 11 is rotatably connected to the follower rod 16, and the follower rod 16 and the cutting wheel 14 are respectively located on the left and right sides of the positioning member 19, so that the inclination angle of the follower rod 11 can be directly controlled by controlling the height of the follower rod 16, and the height of the cutting wheel 14 can be controlled.

[0041] It should be emphasized that, as shown in the figure, the lower end of the positioning member 19 is rotatably connected to a corresponding mounting ring, and the mounting ring is sleeved on the outside of the follower rod 11. Therefore, even if the position of the driven rod 16 does not change, the inclination angle of the follower rod 11 can be changed through the relative movement between the mounting rod and the follower rod 11.

[0042] Similarly, the device is also provided with a driving mechanism on one side of the driven rod 16 to control the height of the driven rod 16. That is, one side of the positioning rod 5 and one side of the follower ring 26 are both provided with driving mechanisms accordingly.

[0043] Specifically, the driving mechanism includes an upper and lower axial screw 20. Therefore, the device is rotatably connected to a follower shaft 27 on the inner side of the follower ring 26. The positioning rod 5 and the follower shaft 27 are threadedly connected to the screw 20 in the corresponding driving mechanism through the internal threaded hole Ⅰ15. It is only necessary to ensure that the positioning rod 5 and the follower shaft 27 cannot rotate around the corresponding screw 20. The position change of the positioning rod 5 and the follower ring 26 can be achieved by rotating the screw 20.

[0044] At the same time, in order to fix the position of the screw 20, the device is provided with a fixed shell on the outside of each screw 20, and the position of the screw 20 is fixed by constraining the fixed shell to be fixedly connected to the support base 1, and the screw 20 is rotatably connected to the corresponding fixed shell.

[0045] Furthermore, in order to ensure that the positioning rod 5 and the follower shaft 27 cannot rotate around the corresponding screw rod 20, and to avoid unilateral force imbalance of the positioning rod 5 and the follower shaft 27, the device is respectively provided with a driving mechanism at the two axial ends of the positioning rod 5 and the follower shaft 27. This can utilize the two driving mechanisms to cooperate with each other to achieve the effect of avoiding rotation and bidirectional driving.

[0046] Furthermore, in the device, a transmission wheel Ⅰ24 is coaxially fixedly connected to the lower end of each screw 20. By jointly sleeved a conveyor belt Ⅰ25 on the outside of the transmission wheel Ⅰ24 corresponding to the positioning rod 5 and the transmission wheel Ⅰ24 corresponding to the follower shaft 27, the conveyor belt 1 can be used to achieve the purpose of synchronous rotation of the screw 20 on one side. At this time, it is only necessary to ensure that the screws 20 on the front and rear sides rotate synchronously, so that multiple screws 20 can be rotated synchronously.

[0047] That is, by constraining the thread direction on different screw rods 20, so that during the synchronous rotation of multiple screw rods 20, the driven rod 16 and the follower ring 26 move in opposite directions, the processing mode - the follower ring 26 and the cutting wheel 14 move down to abut against the transfer paper 3, and the maintenance mode - the follower ring 26 and the cutting wheel 14 move up to release the constraint on the transfer paper 3 can be completed synchronously.

[0048] Therefore, in order to achieve synchronous rotation of the front and rear screw rods 20, the device has transmission wheels Ⅱ21 coaxially fixedly connected to the outside of the screw rods 20 on both sides of the positioning rod 5, and a conveyor belt Ⅱ22 is sleeved on the outside of the two transmission wheels Ⅱ21. This purpose can be achieved by using the conveyor belt Ⅱ22.

[0049] It should be noted that, like the driving roller 2 and the driving shaft 17, the device can realize the spontaneous rotation of a single gear by using a gear or a similar transmission mechanism in cooperation with a driving motor under one of the screws 20.

[0050] Furthermore, in order to adapt to transfer papers 3 of different widths and different cutting widths, the device is provided with a through hole 10 and an internal threaded hole II 18 on each support member 12 and each positioning member 19, and a positioning rod 5 is commonly inserted into the multiple internal threaded holes II 18 whose central axes coincide with each other. At this time, by limiting the positioning rod 5 to a bidirectional screw 20 structure and combining the number of positioning members 19 to three, when the support member 12 and the positioning member 19 are restricted from rotating, the positioning rod 5 can be threadedly connected with the corresponding positioning member 19 and the support member 12 through the external thread, and the distance between different adjacent support members 12 and adjacent positioning members 19 can be changed by rotating the positioning rod 5.

[0051] It should be noted that the follower rod 11 is relatively fixed to the driven rod 16 by bolts, so if the position of the follower rod 11 needs to be adjusted, the follower rod 11 is slidably connected to the driven rod 16. As shown in the figure, the device has a sliding groove on the driven rod 16 for the middle section of the bolt, and the nut and screw head corresponding to the bolt are respectively located on the upper and lower sides of the driven rod 16 to constrain the position of the bolt.

[0052] Specifically, in order to restrict the support member 12 and the positioning member 19 from rotating, a limit rod 4 is commonly inserted into a plurality of through holes 10 whose central axes coincide with each other in the present device. It is only necessary to constrain the limit rod 4 to be fixedly connected to the support base 1, and the limit rod 4 can be used in conjunction with the positioning rod 5 to ensure that the support member 12 and the positioning member 19 cannot rotate.

[0053] Furthermore, in order to fully ensure the corresponding relationship between the positioning member 19 and the supporting member 12, the device is coaxially fixedly connected with a transmission wheel III8 on the side end of each positioning rod 5, and the two transmission wheels III8 are constrained to be linked through the conveyor belt III9, which can fully ensure that each positioning member 19 and the corresponding supporting member 12 move synchronously.

[0054] In actual use, the utility model:

[0055] First, the transmission wheel III8 cooperates with the conveyor belt III9 to synchronously rotate the two positioning rods 5 so that the multiple positioning members 19 and the multiple supporting members 12 move synchronously;

[0056] Then, when the distance between adjacent positioning members 19, that is, the distance between adjacent cutting wheels 14 meets the expected target, the rotation of the positioning rod 5 is stopped;

[0057] Afterwards, the drive motor corresponding to the screw rod 20 is turned on to control the driven rod 16 to move upward, and then the cutting wheel 14 and the follower ring 26 move downward synchronously;

[0058] Then, when the cutting wheel 14 and the follower ring 26 move downward and abut against the transfer paper 3, the drive motor corresponding to the drive shaft 17 and the drive roller 2 is turned on, and at this time, the device starts to operate normally;

[0059] Finally, as the processing continues, when the transfer paper 3 has wrinkles, deflections, and other problems, the drive motor corresponding to the screw 20 is turned on in the reverse direction to control the driven rod 16 to move downward, and the cutting wheel 14 and the follower ring 26 move upward synchronously.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transfer paper equidistant cutting mechanism, characterized in that: The invention comprises a support base (1), wherein a follower roller (7) and a driving roller (2) are respectively arranged on the left and right sides of the support base (1) in a front-rear axial direction, a transfer paper (3) is arranged between the follower roller (7) and the driving roller (2), and two ends of the transfer paper (3) are respectively wound around the side ends of the follower roller (7) and the driving roller (2); The upper end of the support seat (1) is provided with a driven rod (16) and a positioning rod (5), and the lower end of the positioning rod (5) is provided with a plurality of follower rods (11) arranged in parallel from front to back via a plurality of positioning members (19); One axial end of each follower rod (11) is rotatably connected to a cutting wheel (14), and the other axial end of each follower rod (11) is slidably connected to a driven rod (16), and the cutting wheel (14) and the driven rod (16) are respectively located on the left and right sides of the positioning rod (5); The upper end of the support seat (1) is provided with two front-to-rear axial drive shafts (17) and a follower ring (26) in parallel, wherein the drive shaft (17) is rotatably connected to the support seat (1), and the follower ring (26) is rotatably connected to the inner side thereof. The transfer paper (3) is located between the follower ring (26) and the drive shaft (17), and the upper and lower ends of the transfer paper (3) are respectively in contact with the follower ring (26) and the drive shaft (17); A driving mechanism is provided on one side of the driven rod (16) and one side of the follower shaft (27). The driving mechanism includes upper and lower axial screw rods (20). A plurality of screw rods (20) are linked together through a conveyor belt I (25).

2. The transfer paper equidistant cutting mechanism according to claim 1, characterized in that: A fixed shell is sleeved on the outside of each screw rod (20), the screw rod (20) is rotatably connected to the fixed shell, and the fixed shell is fixedly connected to the support base (1); The front and rear ends of the positioning rod (5) and the follower shaft (27) are provided with internal threaded holes I (15) for the screw rod (20), and the positioning rod (5) and the follower shaft (27) are threadedly connected to the screw rod (20) through the internal threaded holes I (15); The lower end of each screw rod (20) is coaxially fixedly connected with a transmission wheel I (24), and the transmission wheel I (24) corresponding to the positioning rod (5) and the transmission wheel I (24) corresponding to the follower shaft (27) are sleeved with a conveyor belt I (25) on their outer sides.

3. The transfer paper equidistant cutting mechanism according to claim 2, characterized in that: Each positioning rod (5) and each follower shaft (27) is provided with a driving mechanism at both ends, and the lower ends of the screw rods (20) located on both sides of the positioning rod (5) are coaxially fixedly connected with a transmission wheel II (21), and a conveyor belt II (22) is sleeved on the outer sides of the two transmission wheels II (21).

4. The transfer paper equidistant cutting mechanism according to claim 1, characterized in that: A plurality of support members (12) are arranged in parallel from front to back on the upper end of the support seat (1), the plurality of support members (12) correspond to the plurality of cutting wheels (14) one by one, and each support member (12) is provided with a dovetail groove (13) extending through the left and right sides.

5. The transfer paper equidistant cutting mechanism according to claim 4, characterized in that: Each of the support members (12) and each of the positioning members (19) is provided with a through hole (10) and an internal threaded hole II (18); a plurality of through holes (10) whose central axes coincide with each other are commonly plugged with a limiting rod (4); the limiting rod (4) is fixedly connected to the support base (1); and a plurality of internal threaded holes II (18) whose central axes coincide with each other are commonly plugged with a positioning rod (5); The positioning rod (5) is a bidirectional screw (20) structure, and the number of positioning members (19) is three. The positioning rod (5) is threadedly connected to the corresponding positioning members (19) and the support member (12) via external threads.

6. The transfer paper equidistant cutting mechanism according to claim 5, characterized in that: Each positioning rod (5) is fixedly connected to the support base (1), and a transmission wheel III (8) is coaxially fixedly connected to the side end of each positioning rod (5), and the two transmission wheels III (8) are linked by a conveyor belt III (9).

7. The transfer paper equidistant cutting mechanism according to claim 1, characterized in that: A damping ring (6) made of rubber material is coaxially fixedly connected to the outside of the driving shaft (17) and the follower ring (26), and a longitudinal anti-slip groove is circumferentially provided on the outside of the damping ring (6).

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