CN212444623U

CN212444623U - Guide post surface polishing device for punch production

Info

Publication number: CN212444623U
Application number: CN202021881624.6U
Authority: CN
Inventors: 罗洪涛; 佘方元; 周文祥
Original assignee: Dongguan Hailuo Industrial Co ltd
Current assignee: Dongguan Hailuo Industrial Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-02-02
Anticipated expiration: 2030-09-01

Abstract

The utility model provides a guide post surface polishing device for punch production, which comprises a shell, a polishing component, a first rotating component, a second rotating component and a driving component; a cavity is formed in the shell, the polishing assembly is fixedly arranged on one side of the shell, and a grinding head of the polishing assembly is positioned in the cavity; the first rotating assembly comprises a limiting frame, and the limiting frame is arranged at one end inside the shell through a first rotating bearing; one end of the limiting frame facing the center of the shell is provided with a clamping groove; the second rotating assembly comprises a limiting sleeve, and the central axis of the limiting sleeve is superposed with the central axis of the limiting frame; the stop collar passes through the second rolling bearing and installs the one end inside the casing, the embodiment of the utility model provides a through fixing the guide post in the casing, use the motor drive guide post to rotate to polish the guide post through mobilizable bistrique, use safelyr, the roughness of polishing is better.

Description

Guide post surface polishing device for punch production

Technical Field

The utility model belongs to the machining field, in particular to guide post surface finish device is used in punch press production.

Background

The guide post in the punching device is used for guiding the punching die holder, and the surface of the guide post is required to be flat and smooth, so that the surface of the guide post needs to be polished when the guide post is used, and the guide post is straight and the surface of the guide post is smooth.

The existing small guide column is polished by manually using a polisher, and the polishing precision of the polisher cannot be determined, so that the surface polishing flatness of the guide column cannot be guaranteed.

And manual polishing is easy to rub against the polishing disk, which causes harm to the body.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a guide post surface polishing device for a punch press, which comprises a shell, a polishing component, a first rotating component, a second rotating component and a driving component;

a cavity is formed in the shell, the polishing assembly is fixedly arranged on one side of the shell, and a grinding head of the polishing assembly is positioned in the cavity;

the first rotating assembly comprises a limiting frame, and the limiting frame is arranged at one end inside the shell through a first rotating bearing; one end of the limiting frame facing the center of the shell is provided with a clamping groove;

the second rotating assembly comprises a limiting sleeve, and the central axis of the limiting sleeve is superposed with the central axis of the limiting frame;

the limiting sleeve is arranged at one end inside the shell through a second rotating bearing, a conical groove is formed in one end, facing the center of the shell, of the limiting sleeve, and a rubber layer is arranged on the surface of the conical groove;

the driving assembly is fixedly arranged at one end of the shell, and the output end of the driving assembly is in transmission connection with the limiting sleeve.

Further, a first groove is formed in the shell;

the bottom edge of the first groove is provided with a first through hole and two groups of second grooves, the first through hole is positioned between the two groups of second grooves, and the first through hole is communicated with the cavity;

one end of the polishing component is fixedly arranged in the two groups of second grooves.

Further, a first partition plate and a second partition plate are arranged in the cavity;

the first partition plate and the second partition plate are respectively clamped and fixed at two ends in the shell, the first partition plate and the second partition plate are symmetrically and parallelly arranged, one end of the first rotating assembly facing the cavity is movably attached to one side face of the first partition plate, and one end of the second rotating assembly facing the cavity is movably attached to one side face of the second partition plate;

second through holes are formed in the centers of the first partition plate and the second partition plate, and the central axes of the two groups of second through holes are overlapped.

Furthermore, a notch is formed in one end, provided with the second rotating assembly, of the shell, and one end of the driving assembly can be clamped and fixed on the notch.

Further, the polishing assembly comprises a ball screw, a connecting seat, a threaded rod, a guide rod and a grinding head;

a motor for driving the screw rod to rotate is arranged at one end of the ball screw rod, the ball screw rod is rotatably arranged in one group of second grooves, the guide rod is fixedly arranged in the other group of second grooves, and the central axes of the ball screw rod and the guide rod are parallel to the central axis of the shell;

the screw rod seat of the ball screw is movably clamped in the group of second grooves; one end of the connecting seat is fixedly connected with a screw rod seat on the ball screw, and the other end of the connecting seat is movably sleeved on the guide rod;

the lower end of the connecting seat is movably clamped in the first through hole;

one end through connection seat of threaded rod is located the cavity, and threaded rod and connecting seat threaded connection, the one end and the bistrique fixed connection that the threaded rod is located the cavity.

Furthermore, first recess internal fixation joint has the apron, and has seted up the through-hole on the apron, the one end of threaded rod is located the through-hole.

Further, the first rotating assembly further comprises a fixing frame;

the fixing frame is arranged at one end inside the shell through a first rotating bearing, the limiting frame is arranged inside the fixing frame in a threaded mode, and the rotating fastening direction of the limiting frame is consistent with the rotating direction of the driving assembly;

one end face of the fixing frame is movably attached to the first partition plate.

Furthermore, a third through hole is formed in one end, far away from the center of the shell, of the limiting frame, and the third through hole is communicated with the clamping groove.

Further, the second rotating assembly further comprises a threaded pipe;

the threaded pipe is installed at one end inside the shell through a second rotating bearing, the limiting sleeve is installed inside the threaded pipe in a threaded mode, and the rotating fastening direction of the limiting sleeve is consistent with the rotating direction of the driving assembly.

Further, the driving assembly comprises a motor, a limiting block and a fixing box;

the motor is fixedly arranged in the fixed box, and the limiting block is fixedly sleeved at one end of the motor output shaft;

the limiting groove is formed in one end of the limiting sleeve, the limiting block can be clamped and fixed in the limiting groove, a connecting plate is arranged at the opening of the fixing box, and the connecting plate can be clamped and fixed on the notch.

The utility model has the advantages that:

1. the embodiment of the utility model fixes the guide post in the shell, uses the motor to drive the guide post to rotate, and polishes the guide post through the movable grinding head, thereby having safer use and better polishing flatness;

2. the rotating fastening direction of the clamping pieces at the two ends of the guide column is consistent with the rotating direction of the motor output shaft, so that the clamping pieces at the two ends of the guide column can clamp the guide column when the motor rotates, the guide column can rotate along with the clamping pieces, and the guide column is simple in structure and more convenient to operate;

3. but set up to split structure through the joint spare with the guide post both ends, peg graft in joint spare when the one end of guide post, the diameter of joint spare is greater than the diameter of guide post too much, leads to joint spare can't play when playing spacing effect to the guide post, and the joint spare that removable diameter is fit for carries on spacingly to the guide post, uses in a flexible way, and application scope is wide.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 shows a schematic exploded view of a polishing apparatus according to an embodiment of the present invention;

fig. 2 shows a first view angle cross-sectional structure diagram of the housing according to the embodiment of the present invention;

fig. 3 is a schematic view showing a second perspective cross-sectional structure of the housing according to the embodiment of the present invention;

FIG. 4 shows a schematic structural view of a polishing assembly according to an embodiment of the present invention;

fig. 5 shows a schematic cross-sectional view of a first rotating assembly according to an embodiment of the invention;

fig. 6 shows a schematic split sectional view of a second rotating assembly according to an embodiment of the present invention.

In the figure: 1. a housing; 2. a polishing assembly; 3. a first rotating assembly; 4. a second rotating assembly; 5. a drive assembly; 101. a first groove; 102. a second groove; 103. a first through hole; 104. a cavity; 105. a first separator; 106. a second separator; 107. a second through hole; 108. a notch; 201. a ball screw; 202. a connecting seat; 203. a threaded rod; 204. a guide bar; 205. grinding heads; 301. a first rotating bearing; 302. a fixed mount; 303. a limiting frame; 3031. a card slot; 3032. a third through hole; 401. a second rotary bearing; 402. a threaded pipe; 403. a limiting sleeve; 4031. a tapered groove; 501. a motor; 502. a limiting block; 503. and (5) fixing the box.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model provides a guide post surface polishing device for punch production, including casing 1, polishing subassembly 2, first rotating assembly 3, second rotating assembly 4 and drive assembly 5, as shown in figure 1; a cavity is arranged in the shell 1, the polishing component 2 is arranged on one side of the shell 1, a grinding head of the polishing component 2 is positioned in the cavity, the grinding head can reciprocate in the cavity along the axis direction of the shell 1, and the bottom edge of the grinding head is attached to the outer wall of a guide column arranged in the shell 1 and used for grinding and polishing the surface of the guide column; the first rotating assembly 3 is arranged at one end inside the shell 1, one end of a guide column arranged in the shell 1 can be inserted into the first rotating assembly 3, and the guide column can rotate inside the first rotating assembly 3; the second rotating assembly 4 is arranged at the other end inside the shell 1, and the other end of the guide column arranged in the shell 1 can be clamped and fixed inside the second rotating assembly 4; the driving assembly 5 is arranged on one side of the second rotating assembly 4, the driving assembly 5 can be fixedly arranged at one end of the shell 1, and the output end of the driving assembly 5 can be in transmission connection with one end of the second rotating assembly 4.

Exemplarily, the movable joint of one end of guide post is in the inside of first rotating assembly 3, and the other end fixed joint of guide post is in the inside of second rotating assembly 4, and when drive assembly 5 drive second rotating assembly 4 rotated, polishing assembly 2's bistrique can be reciprocating motion in the cavity, and the guide post that sets up in casing 1 when second rotating assembly 4 rotated, the bistrique that is reciprocating motion can carry out burnishing and polishing to the surface of guide post.

For example, as shown in fig. 2 and fig. 3, the housing 1 is configured as a cylindrical structure, a cavity 104 is formed inside the housing 1, a first groove 101 is formed on an outer wall of the housing 1, a first through hole 103 and two sets of second grooves 102 are formed on a bottom edge of the first groove 101, the first through hole 103 is located between the two sets of second grooves 102, and the first through hole 103 is communicated with the cavity 104; one end of the polishing assembly 2 is fixedly mounted in the two sets of second grooves 102.

Further, a first partition plate 105 and a second partition plate 106 are arranged in the cavity 104, the first partition plate 105 and the second partition plate 106 are respectively clamped and fixed at two ends of the interior of the housing 1, and the first partition plate 105 and the second partition plate 106 are symmetrically arranged in parallel; one end of the first rotating assembly 3 facing the inside of the cavity 104 is movably attached to one side face of the first partition plate 105, one end of the second rotating assembly 4 facing the inside of the cavity 104 is movably attached to one side face of the second partition plate 106, and one ends of the two groups of rotating assemblies facing the inside of the cavity 104 are respectively movably attached to the two groups of partition plates, so that debris generated after grinding and polishing of the guide columns in the cavity 104 is prevented from falling into the rotating assemblies, and influence is caused on the use of the rotating assemblies; the centers of the first partition plate 105 and the second partition plate 106 are both provided with second through holes 107, and two ends of a guide column arranged in the cavity 104 of the shell 1 respectively penetrate through the two groups of second through holes 107 to be positioned in the first rotating assembly 3 and the second rotating assembly 4; a notch 108 is formed in one end of the casing 1, which is provided with the second rotating assembly 4, and one end of the driving assembly 5 can be fixedly arranged at one end of the casing 1, which is provided with the notch 108.

In practical use, the shell 1 can also be in other shapes, such as a polyhedron, a triangular prism and the like; the connection manner of the driving assembly 5 and the housing 1 is not particularly limited, and the present embodiment is only used for exemplary illustration.

The polishing assembly 2 comprises a ball screw 201, a connecting seat 202, a threaded rod 203, a guide rod 204 and a grinding head 205, as shown in FIG. 4; a motor for driving the ball screw 201 to rotate is arranged at one end of the ball screw 201, the ball screw 201 is rotatably installed in one group of the second grooves 102, the guide rod 204 is fixedly installed in the other group of the second grooves 102, and the central axes of the ball screw 201 and the guide rod 204 are parallel to the central axis of the shell 1; the screw rod seat of the ball screw 201 is movably clamped in the group of second grooves 102; one end of the connecting base 202 is fixedly connected with a screw base on the ball screw 201, and the other end of the connecting base 202 is movably sleeved on the guide rod 204; the lower end of the connecting seat 202 is movably clamped in the first through hole 103, and the connecting seat 202 is more stable when moving along with the screw rod seat by movably clamping the lower end of the connecting seat 202 in the first through hole 103; one end of the threaded rod 203 penetrates through the connecting seat 202 and is located in the cavity 104, the threaded rod 203 is in threaded connection with the connecting seat 202, and one end of the threaded rod 203 located in the cavity 104 is fixedly connected with the grinding head 205.

Preferably, first recess 101 internal fixation joint has the apron, and has seted up the through-hole on the apron, the one end of threaded rod 203 is located the through-hole, and threaded rod 203 can be along with ball 201's screw seat at the through-hole internalization, covers polishing subassembly 2 through using the apron, and when using or carrying this device, user's palm and health can not contact ball 201, avoid ball fish tail or extrude the health, use safelyr.

Illustratively, one end of a guide post arranged in the cavity 104 of the housing 1 is movably inserted into the first rotating assembly 3, the other end of the guide post is fixedly clamped inside the second rotating assembly 4, the position of the grinding head 205 is adjusted by a rotary threaded rod 203, so that one surface of the grinding head 205 facing the guide post is attached to the guide post, when the driving assembly 5 drives the second rotating assembly 4 to rotate, so as to drive the guide post to rotate, a motor is started to drive the ball screw 201 to rotate, so that the screw rod base drives the grinding head 205 to reciprocate on the surface of the guide post; when the lower surface of the grinding head 205 cannot be attached to the outer wall of the guide post after the grinding head 205 is worn due to long-term use, the position of the grinding head 205 can be adjusted by rotating the threaded rod 203, so that the lower surface of the grinding head 205 is attached to the guide post again, materials are saved, and the use is more convenient; through the fixed setting in second rotating assembly 4 with the one end of guide post, drive assembly 5 drives its rotation, and ball screw 201 drives bistrique 205 and is reciprocating motion on the guide post surface, polishes more comprehensively, and the integrality is better.

As shown in fig. 5, the first rotating assembly 3 includes a fixed frame 302 and a spacing frame 303; the fixed frame 302 is installed at one end inside the shell 1 through a first rotating bearing 301, the limiting frame 303 is installed inside the fixed frame 302 in a threaded manner, and the rotating fastening direction of the limiting frame 303 is consistent with the rotating direction of the driving component 5; one end face of the fixing frame 302 is movably attached to the first partition 105.

Specifically, a clamping groove 3031 and a third through hole 3032 are respectively formed at two ends of the limiting frame 303; the clamping groove is formed in one end, facing the first partition 105, of the limiting frame 303, one end of the guide post can be clamped in the clamping groove 3031, the third through hole 3032 is formed in the other end of the limiting frame 303, and the third through hole 3032 is communicated with the clamping groove 3031.

The third through hole 3032 may be polygonal or elliptical to facilitate the removal of the stop frame 303 from the fixing frame 302.

Through setting up first rotation component 3 to removable fraction structure, peg graft in draw-in groove 3031 when the one end of guide post, the diameter of draw-in groove 3031 is greater than the diameter of guide post too much, leads to draw-in groove 3031 can't play when playing spacing effect to the guide post, and spacing 303 that removable draw-in groove 3031 diameter is fit for carries on spacingly to the guide post, uses in a flexible way, and application scope is wide.

The rotating direction of the limiting frame 303 is consistent with the rotating direction of the driving assembly 5, when the driving assembly 5 drives the guide post to rotate, the limiting frame 303 only rotates in the fastening direction, the limiting frame 303 is prevented from falling off from the fixing frame 302, the use is safe, and the fastening is more convenient.

The second rotating assembly 4 comprises a threaded pipe 402 and a stop collar 403, as shown in fig. 6; the threaded pipe 402 is installed at one end inside the shell 1 through a second rotating bearing 401, the stop collar 403 is installed inside the threaded pipe 402 in a threaded manner, and the rotating and fastening direction of the stop collar 403 is consistent with the rotating direction of the driving assembly 5; one end face of the threaded pipe 402 is movably attached to the second partition plate 106, one end of the limiting sleeve 403 is provided with a limiting groove, and the output end of the driving assembly 5 is clamped and fixed in the limiting groove;

specifically, the taper groove 4031 has been seted up towards the one end of second baffle 106 to stop collar 403, and the surface of taper groove 4031 is provided with the rubber layer, the one end joint of guide post is in taper groove 4031, and the one end of guide post and the side laminating of taper groove 4031, through set up the rubber layer in taper groove 4031, the guide post joint is more stable.

Illustratively, the driving assembly 5 drives the limiting sleeve 403 to rotate, and the limiting sleeve 403 can rotate towards the screwing direction until the guide post is clamped and fixed and cannot rotate; through setting up second rotating component 4 to self-locking structure, it is more convenient when fixed to the guide post.

Further, drive assembly 5 includes motor 501, stopper 502 and fixed case 503, motor 501 fixed mounting is in fixed case 503's inside, stopper 502 fixes the cover in the one end of motor 501 output shaft, but stopper 502 joint is fixed at the spacing inslot, the one end of fixed case 503 is provided with the connecting plate, but the connecting plate joint is fixed on breach 108.

In practical use, the fixing manner of the fixing box 503 and the housing 1 is not limited, and this embodiment is only an exemplary illustration.

Exemplarily, a guide post is arranged in the cavity 104 inside the housing 1, the limit frame 303 is installed in the fixing frame 302 in a threaded manner, one end of the guide post is clamped in the tapered groove 4031, and the other end of the guide post is clamped in the limit frame 303; the fixing box 503 is sleeved on the shell 1, and the limiting block 502 is clamped and fixed in a limiting groove on the limiting sleeve 403, the starting motor 501 drives the limiting sleeve 403 to rotate, because the rotating fastening direction of the limiting sleeve 403 and the limiting frame 303 is consistent with the driving direction of the motor 501, when the output shaft of the motor 501 rotates, the limiting sleeve 403 and the limiting frame 303 can rotate and lock, in the rotating process, the limiting sleeve 403 and the limiting frame 303 can clamp and fix the guide post, the switch used for driving the ball screw 201 to rotate is started at the moment, so that the screw base on the ball screw 201 drives the grinding head 205 to do reciprocating motion on the surface of the guide post, and the guide post is subjected to comprehensive polishing.

The embodiment of the utility model provides a be not limited to polish to the punch press guide post, still can be used to polish other tubulose or shaft-like object.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a guide post surface finish device for punch press which characterized in that: comprises a shell (1), a polishing component (2), a first rotating component (3), a second rotating component (4) and a driving component (5);

a cavity (104) is arranged in the shell (1), the polishing assembly (2) is fixedly arranged on one side of the shell (1), and a grinding head (205) of the polishing assembly (2) is positioned in the cavity (104);

the first rotating assembly (3) comprises a limiting frame (303), and the limiting frame (303) is installed at one end inside the shell (1) through a first rotating bearing (301); one end of the limiting frame (303) facing the center of the shell (1) is provided with a clamping groove (3031);

the second rotating assembly (4) comprises a limiting sleeve (403), and the central axis of the limiting sleeve (403) is superposed with the central axis of the limiting frame (303);

the limiting sleeve (403) is mounted at one end inside the shell (1) through a second rotating bearing (401), a tapered groove (4031) is formed in one end, facing the center of the shell (1), of the limiting sleeve (403), and a rubber layer is arranged on the surface of the tapered groove (4031);

the driving assembly (5) is fixedly arranged at one end of the shell (1), and the output end of the driving assembly (5) is in transmission connection with the limiting sleeve (403).

2. The surface polishing device of a guide post for a punch press according to claim 1, wherein: a first groove (101) is formed in the shell (1);

a first through hole (103) and two groups of second grooves (102) are formed in the bottom edge of the first groove (101), the first through hole (103) is located between the two groups of second grooves (102), and the first through hole (103) is communicated with the cavity (104);

one end of the polishing component (2) is fixedly arranged in the two groups of second grooves (102).

3. The surface polishing device of a guide post for a punch press according to claim 1, wherein: a first clapboard (105) and a second clapboard (106) are arranged in the cavity (104);

the first partition plate (105) and the second partition plate (106) are respectively clamped and fixed at two ends inside the shell (1), the first partition plate (105) and the second partition plate (106) are symmetrically and parallelly arranged, one end, facing the inside of the cavity (104), of the first rotating assembly (3) is movably attached to one side face of the first partition plate (105), and one end, facing the inside of the cavity (104), of the second rotating assembly (4) is movably attached to one side face of the second partition plate (106);

second through holes (107) are formed in the centers of the first partition plate (105) and the second partition plate (106), and the central axes of the two groups of second through holes (107) are overlapped.

4. The surface polishing device of a guide post for a punch press according to claim 1, wherein: a notch (108) is formed in one end, provided with the second rotating assembly (4), of the shell (1), and one end of the driving assembly (5) can be clamped and fixed on the notch (108).

5. The surface polishing device of a guide post for a punch press according to claim 2, wherein: the polishing assembly (2) comprises a ball screw (201), a connecting seat (202), a threaded rod (203), a guide rod (204) and a grinding head (205);

a motor for driving the screw to rotate is arranged at one end of the ball screw (201), the ball screw (201) is rotatably installed in one group of second grooves (102), the guide rod (204) is fixedly installed in the other group of second grooves (102), and the central axes of the ball screw (201) and the guide rod (204) are parallel to the central axis of the shell (1);

a screw rod seat of the ball screw (201) is movably clamped in the group of second grooves (102); one end of the connecting seat (202) is fixedly connected with a screw rod seat on the ball screw (201), and the other end of the connecting seat (202) is movably sleeved on the guide rod (204);

the lower end of the connecting seat (202) is movably clamped in the first through hole (103);

one end of the threaded rod (203) penetrates through the connecting seat (202) and is located in the cavity (104), the threaded rod (203) is in threaded connection with the connecting seat (202), and one end, located in the cavity (104), of the threaded rod (203) is fixedly connected with the grinding head (205).

6. The surface polishing device of a guide post for a punch press according to claim 5, wherein: the first groove (101) is fixedly clamped with a cover plate, a through hole is formed in the cover plate, and one end of the threaded rod (203) is located in the through hole.

7. The surface polishing device of a guide post for a punch press according to claim 3, wherein: the first rotating assembly (3) further comprises a fixed frame (302);

the fixing frame (302) is installed at one end inside the shell (1) through a first rotating bearing (301), the limiting frame (303) is installed inside the fixing frame (302) in a threaded mode, and the rotating fastening direction of the limiting frame (303) is consistent with the rotating direction of the driving assembly (5);

one end face of the fixed frame (302) is movably attached to the first partition plate (105).

8. The surface polishing device of a guide post for a punch press according to claim 1, wherein: and a third through hole (3032) is formed in one end, far away from the center of the shell (1), of the limiting frame (303), and the third through hole (3032) is communicated with the clamping groove (3031).

9. The surface polishing device of a guide post for a punch press according to claim 1, wherein: the second rotating assembly (4) further comprises a threaded pipe (402);

the threaded pipe (402) is installed at one end of the inner portion of the shell (1) through a second rotating bearing (401), the limiting sleeve (403) is installed in the threaded pipe (402) in a threaded mode, and the rotating fastening direction of the limiting sleeve (403) is consistent with the rotating direction of the driving assembly (5).

10. The surface polishing device of a guide post for a punch press according to claim 1, wherein: the driving assembly (5) comprises a motor (501), a limiting block (502) and a fixed box (503);

the motor (501) is fixedly arranged in the fixed box (503), and the limiting block (502) is fixedly sleeved at one end of an output shaft of the motor (501);

the limiting groove has been seted up to the one end of stop collar (403), but stopper (502) joint is fixed at the limiting groove, the opening part of fixed case (503) is provided with the connecting plate, but the connecting plate joint is fixed on breach (108).