CN111958404A

CN111958404A - Brake pin production equipment and production method thereof

Info

Publication number: CN111958404A
Application number: CN202010821735.6A
Authority: CN
Inventors: 王生宏
Original assignee: Gaoyou Auto Standard Parts Factory
Current assignee: Gaoyou Auto Standard Parts Factory
Priority date: 2020-08-15
Filing date: 2020-08-15
Publication date: 2020-11-20

Abstract

The invention discloses brake pin production equipment and a production method thereof, and belongs to the technical field of brake pin production equipment. The utility model provides a brake pin production facility, includes the diaphragm, the bottom four corners of diaphragm all is fixed with the supporting leg, the top four corners of diaphragm all is fixed with the stand, four the top of stand is fixed with the backup pad, the top of backup pad is fixed with the U template, the both sides inner wall of U template all is fixed with the connecting block, the top both ends of diaphragm all rotate through the bearing and are connected with the threaded rod, the threaded rod all runs through the top of backup pad, the top of threaded rod all rotates through the bottom of bearing and corresponding connecting block and is connected. The dust-collecting device does not need manual grinding, so that time and labor are saved, the efficiency is higher, and in the grinding process, the generated dust can be sucked into the uncovered box body through arranging the suction fan, the suction pipe, the dust hood, the air outlet pipe, the uncovered box body and the filter screen, so that the dust-collecting device is beneficial to the health of workers.

Description

Brake pin production equipment and production method thereof

Technical Field

The invention relates to the technical field of brake pin production equipment, in particular to brake pin production equipment and a production method thereof.

Background

The brake cylinder is an indispensable chassis brake part of a brake system and mainly has the function of pushing a brake pad to rub a brake drum. The vehicle speed is reduced and stationary. After the brake is stepped on, the master cylinder generates thrust to press hydraulic oil to the wheel cylinder, a piston in the wheel cylinder starts to move under the action of hydraulic pressure to push a brake pad, a guide pin is arranged on the wheel cylinder, and the guide pin is used for enabling the brake pad to vertically act on a brake disc under the action of the brake piston.

The brake guide pin needs to be polished in the production process, and is generally polished by a worker holding sand paper, so that the operation is time-consuming and labor-consuming, and dust can be generated in the polishing process, so that the health of the worker is not facilitated, and therefore, the brake pin production equipment and the production method thereof are provided for solving the problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a brake pin production device and a production method thereof, which solve the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a brake pin production device comprises a transverse plate, wherein supporting legs are fixed to four corners of the bottom of the transverse plate, stand columns are fixed to four corners of the top of the transverse plate, supporting plates are fixed to the tops of the four stand columns, a U-shaped plate is fixed to the tops of the supporting plates, connecting blocks are fixed to inner walls of two sides of the U-shaped plate, threaded rods are rotatably connected to two ends of the top of the transverse plate through bearings and penetrate through the tops of the supporting plates, the top ends of the threaded rods are rotatably connected with the bottoms of the corresponding connecting blocks through bearings, driven gears are fixedly sleeved on the surfaces of the threaded rods, a servo motor is fixed to the top of the transverse plate, a driving gear is fixed to an output shaft of the servo motor, a chain is arranged above the transverse plate, the driving gear is in transmission connection with the two driven gears through the chain, and a sliding plate, one side wall of the sliding plate is connected with the inner wall of one side adjacent to the U-shaped plate in a sliding manner, the other side wall of the sliding plate is connected with a connecting rod in a rotating manner through a pin shaft, the top of the supporting plate is connected with a vertical plate in a sliding manner, one end, far away from the sliding plate, of the connecting rod is connected with one side wall of the adjacent vertical plate in a rotating manner through a pin shaft, a stepping motor is fixed on one side wall of the vertical plate, a pressure plate is fixed on an output shaft of the stepping motor, a first electric push rod is fixed on the top of the supporting plate, a bracket is fixed at the output end of the first electric push rod, a second electric push rod is fixed on the top of the U-shaped plate, the output end of the second electric push rod penetrates through the top of the U-shaped plate and is fixed with a connecting plate, a T-shaped guide rod is symmetrically fixed on the, the utility model discloses a dust collector, including connecting plate, telescopic tube, suction fan, mounting panel, suction hood, dust hood, air-out end, fan, filter screen, be provided with the mounting panel, the below of connecting plate is provided with the mounting panel, telescopic tube's bottom all with the top fixed connection of mounting panel, telescopic tube's the outside all overlaps and is equipped with the spring, the both ends of spring respectively with the bottom of connecting plate and the top fixed connection of mounting panel, the bottom of mounting panel is fixed with abrasive paper, the rear of bracket is provided with the suction fan, the bottom of suction fan and the top fixed connection of backup pad, the air-out end of suction fan is fixed with the suction pipe, the one end of suction pipe is fixed with out the tuber pipe, the top of backup pad is fixed with the uncovered box, the top of uncovered box is fixed with the filter screen, the back.

As a preferred technical scheme of the invention, the bottom of each supporting leg is provided with a universal self-locking wheel.

As a preferable technical scheme of the invention, through holes are symmetrically formed in the top of the supporting plate, and the threaded rods respectively penetrate through the corresponding through holes.

According to a preferable technical scheme of the invention, threaded holes are formed in the tops of the sliding plates, the threaded rods are in threaded connection with the threaded holes of the corresponding sliding plates, sliding blocks are symmetrically fixed on one side wall of each sliding plate, sliding grooves are symmetrically formed in the inner walls of the two sides of each U-shaped plate, and the sliding blocks are respectively connected in the corresponding sliding grooves in a sliding manner.

As a preferable technical scheme of the invention, T-shaped blocks are symmetrically fixed at the bottoms of the vertical plates, four T-shaped grooves are symmetrically formed at the top of the supporting plate, and the T-shaped blocks are respectively connected in the corresponding T-shaped grooves in a sliding manner.

According to a preferable technical scheme of the invention, the top of the U-shaped plate is provided with avoidance holes, the output end of the second electric push rod penetrates through the avoidance holes, the top of the U-shaped plate is symmetrically provided with guide holes, and the T-shaped guide rods respectively penetrate through the corresponding guide holes.

As a preferable technical scheme of the invention, the side wall of the pressure plate, which is far away from the stepping motor, is provided with anti-skid grains.

A production method of brake pin production equipment comprises the following steps:

s1: firstly, a brake guide pin to be polished is placed on a bracket, then a first electric push rod is started, and the bracket can be driven by the first electric push rod to move upwards, so that the guide pin can be positioned between two pressure plates;

s2: then a servo motor is started, the servo motor can drive a driving gear to rotate, the driving gear can drive two driven gears to rotate through a chain, the driven gears can drive corresponding threaded rods to rotate, the threaded rods can drive corresponding sliding plates to move upwards, the sliding plates can drive corresponding vertical plates to move towards the middle, so that the two pressure plates can clamp and fix the guide pins, the stepping motor is started, and the stepping motor can drive the pressure plates to rotate, so that the guide pins can be driven to rotate;

and S3, starting the second electric push rod, wherein the second electric push rod can drive the connecting plate to move downwards so as to drive the abrasive paper to be in close contact with the surface of the guide pin, when the abrasive paper is in contact with the guide pin, the spring is in a compressed state, and the thickness of the guide pin can be thinned in the polishing process, so that the abrasive paper can be always in close contact with the surface of the guide pin under the action of the elastic force of the spring, starting the suction fan in the polishing process, sucking the dust generated in the polishing process into the uncovered box body, and retaining the dust in the uncovered box body under the action of the filter screen, thereby being beneficial to the body health of workers.

(III) advantageous effects

Compared with the prior art, the invention provides a brake pin production device and a production method thereof, and the brake pin production device has the following beneficial effects:

1. this brake pin production facility and production method, through setting up first electric putter and bracket, can lift the uide pin that needs to polish between two pressure disks, through setting up the threaded rod, driven gear, servo motor, the driving gear, the chain, the slide, connecting rod and riser, can make two pressure disks move toward the centre, thereby can fix the uide pin centre gripping, through setting up step motor, can drive the pressure disk and rotate, thereby can drive the uide pin and rotate, through setting up second electric putter, the connecting plate, T type guide bar, the telescopic sleeve, mounting panel and spring, can make the surface contact of abrasive paper and uide pin, thereby can realize polishing the surface of uide pin, do not need to polish through the manpower, so labour saving and time saving, efficiency is higher.

2. According to the production equipment and the production method of the brake pin, the suction fan, the suction pipe, the dust hood, the air outlet pipe, the uncovered box body and the filter screen are arranged, so that generated dust can be sucked into the uncovered box body in the polishing process, and the health of workers is facilitated.

Drawings

FIG. 1 is a schematic view of the overall front perspective structure of the present invention;

FIG. 2 is a schematic view of an overall backside perspective of the present invention;

FIG. 3 is a schematic view of the overall front view structure of the present invention;

FIG. 4 is a schematic top view of the support plate of the present invention;

FIG. 5 is a schematic top view of the slider of the present invention;

FIG. 6 is a schematic side view of a riser of the present invention;

fig. 7 is a schematic top view of the U-shaped board of the present invention.

In the figure: 1. a transverse plate; 2. supporting legs; 3. a column; 4. a support plate; 5. a U-shaped plate; 6. connecting blocks; 7. a threaded rod; 8. a driven gear; 9. a servo motor; 10. a driving gear; 11. a chain; 12. a slide plate; 13. a connecting rod; 14. a vertical plate; 15. a stepping motor; 16. a platen; 17. a first electric push rod; 18. a bracket; 19. a second electric push rod; 20. a connecting plate; 21. a T-shaped guide rod; 22. a telescopic sleeve; 23. mounting a plate; 24. a spring; 25. sand paper; 26. a suction fan; 27. an air suction pipe; 28. a dust hood; 29. an air outlet pipe; 30. a case body without a cover; 31. a filter screen; 32. a box door; 33. a universal self-locking wheel; 34. a through hole; 35. a threaded hole; 36. a slider; 37. a chute; 38. a T-shaped block; 39. a T-shaped groove; 40. avoiding holes; 41. and (4) a guide hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-7, the present invention provides the following technical solutions: a brake pin production device comprises a transverse plate 1, supporting legs 2 are fixed at the four corners of the bottom of the transverse plate 1, stand columns 3 are fixed at the four corners of the top of the transverse plate 1, supporting plates 4 are fixed at the tops of the four stand columns 3, U-shaped plates 5 are fixed at the tops of the supporting plates 4, connecting blocks 6 are fixed on the inner walls of the two sides of each U-shaped plate 5, threaded rods 7 are rotatably connected to the two ends of the top of the transverse plate 1 through bearings, the threaded rods 7 penetrate through the tops of the supporting plates 4, the top ends of the threaded rods 7 are rotatably connected with the bottoms of the corresponding connecting blocks 6 through bearings, driven gears 8 are sleeved and fixed on the surfaces of the threaded rods 7, a servo motor 9 is fixed at the top of the transverse plate 1, a driving gear 10 is fixed on an output shaft of the servo motor 9, a chain 11 is arranged above the transverse plate 1, the driving gear 10, one side wall of a sliding plate 12 is connected with one side inner wall adjacent to a U-shaped plate 5 in a sliding manner, the other side wall of the sliding plate 12 is connected with a connecting rod 13 in a rotating manner through a pin shaft symmetrically, the top of a supporting plate 4 is connected with a vertical plate 14 in a sliding manner symmetrically, one end, far away from the sliding plate 12, of the connecting rod 13 is connected with one side wall of the adjacent vertical plate 14 through a pin shaft rotatably, one side wall of the vertical plate 14 is fixed with a stepping motor 15, output shafts of the stepping motor 15 are fixed with pressure plates 16, the top of the supporting plate 4 is fixed with a first electric push rod 17, the output end of the first electric push rod 17 is fixed with a bracket 18, the top of the U-shaped plate 5 is fixed with a second electric push rod 19, the output end of the second electric push rod 19 penetrates through the top of the U-shaped plate 5 and is fixed with a connecting plate 20, the top of the connecting plate 20 is symmetrically, the below of connecting plate 20 is provided with mounting panel 23, the bottom of telescopic sleeve 22 all with the top fixed connection of mounting panel 23, the outside of telescopic sleeve 22 all is equipped with spring 24, the both ends of spring 24 respectively with the bottom of connecting plate 20 and the top fixed connection of mounting panel 23, the bottom of mounting panel 23 is fixed with abrasive paper 25, the rear of bracket 18 is provided with suction fan 26, the bottom of suction fan 26 and the top fixed connection of backup pad 4, suction pipe 27 is fixed with to suction end of suction fan 26, the one end of suction pipe 27 is fixed with suction hood 28, the air-out end of suction fan 26 is fixed with air-out pipe 29, the top of backup pad 4 is fixed with uncovered box 30, the top of uncovered box 30 is fixed with filter screen 31, the back of uncovered box 30 articulates through the hinge has chamber door 32, the one end and the uncovered box 30 intercommunication of air-out pipe 29.

In this embodiment, by providing the first electric push rod 17 and the bracket 18, the guide pin to be polished can be lifted between the two pressing plates 16, by providing the threaded rod 7, the driven gear 8, the servo motor 9, the driving gear 10, the chain 11, the sliding plate 12, the connecting rod 13 and the vertical plate 14, the two pressing plates 16 can be moved toward the middle, so that the guide pin can be clamped and fixed, by providing the stepping motor 15, the pressing plates 16 can be driven to rotate, thereby the guide pin can be driven to rotate, by providing the second electric push rod 19, the connecting plate 20, the T-shaped guide rod 21, the telescopic sleeve 22, the mounting plate 23 and the spring 24, the sand paper 25 can be in contact with the surface of the guide pin, thereby the surface of the guide pin can be polished, without manual polishing, thereby time and labor are saved, the efficiency is high, by providing the suction fan 26, the suction pipe 27 and the spring 24, The dust hood 28, the air outlet pipe 29, the uncovered box body 30 and the filter screen 31 can suck generated dust into the uncovered box body 30 in the polishing process, so that the body health of workers is facilitated, wherein a male buckle is arranged on the box door 32, a female buckle is arranged on the uncovered box body 30, and the male buckle is matched with the female buckle to mainly play a role in locking the box door 32.

Specifically, universal auto-lock wheel 33 is all installed to the bottom of supporting leg 2.

In this embodiment, the universal self-locking wheel 33 is mounted on the bottom of the support leg 2 for easy movement.

Specifically, through holes 34 are symmetrically formed in the top of the support plate 4, and the threaded rods 7 penetrate through the corresponding through holes 34 respectively.

In this embodiment, the through holes 34 are symmetrically formed at the top of the support plate 4, so that the two threaded rods 7 can smoothly pass through the support plate 4.

Specifically, threaded hole 35 has all been seted up at the top of slide 12, threaded rod 7 and corresponding slide 12's threaded hole 35 threaded connection, and slide 12's a lateral wall is all fixed with slider 36 symmetrically, and spout 37 has all been seted up symmetrically to the both sides inner wall of U template 5, and slider 36 is sliding connection respectively in corresponding spout 37.

In this embodiment, set up screw hole 35 through the top at slide 12, be for cooperating with threaded rod 7, through the fixed slider 36 of a lateral wall symmetry in slide 12, set up spout 37 in the equal symmetry of both sides inner wall of U template 5, when threaded rod 7 rotated, can drive slide 12 stable the sliding on U template 5.

Specifically, the bottom of the vertical plate 14 is symmetrically fixed with T-shaped blocks 38, the top of the support plate 4 is symmetrically provided with four T-shaped grooves 39, and the T-shaped blocks 38 are respectively slidably connected in the corresponding T-shaped grooves 39.

In this embodiment, the T-shaped blocks 38 are symmetrically fixed to the bottoms of the vertical plates 14, and the four T-shaped grooves 39 are symmetrically formed in the top of the support plate 4, so that the two vertical plates 14 can stably slide on the support plate 4.

Specifically, the top of the U-shaped plate 5 is provided with an avoiding hole 40, the output end of the second electric push rod 19 penetrates through the avoiding hole 40, the top of the U-shaped plate 5 is symmetrically provided with guide holes 41, and the T-shaped guide rods 21 penetrate through the corresponding guide holes 41 respectively.

In this embodiment, the avoidance holes 40 are formed in the top of the U-shaped plate 5 to enable the output end of the second electric push rod 19 to smoothly pass through the top of the U-shaped plate 5, and the guide holes 41 are symmetrically formed in the top of the U-shaped plate 5 to enable the T-shaped guide rod 21 to smoothly pass through the top of the U-shaped plate 5.

Specifically, the side wall of the pressure plate 16 far away from the stepping motor 15 is provided with anti-skid lines.

In this embodiment, the anti-slip threads are disposed on the side wall of the pressure plate 16 to firmly hold the brake guide pin.

s1: firstly, a brake guide pin needing to be polished is placed on a bracket 18, then a first electric push rod 17 is started, and the bracket 18 can be driven by the first electric push rod 17 to move upwards, so that the guide pin can be positioned between two pressure plates 16;

s2: then, a servo motor 9 is started, the servo motor 9 can drive a driving gear 10 to rotate, the driving gear 10 can drive two driven gears 8 to rotate through a chain 11, the driven gears 8 can drive corresponding threaded rods 7 to rotate, the threaded rods 7 can drive corresponding sliding plates 12 to move upwards, the sliding plates 12 can drive corresponding vertical plates 14 to move towards the middle, so that the guide pins can be clamped and fixed by two pressing plates 16, a stepping motor 15 is started, and the stepping motor 15 can drive the pressing plates 16 to rotate, so that the guide pins can be driven to rotate;

s3, starting the second electric push rod 19, the second electric push rod 19 can drive the connecting plate 20 to move downwards, so that the abrasive paper 25 can be driven to be in close contact with the surface of the guide pin, when the abrasive paper 25 is in contact with the guide pin, the spring 24 is in a compressed state, and the thickness of the guide pin can be reduced in the polishing process, so that the abrasive paper 25 can be always in close contact with the surface of the guide pin under the action of the elastic force of the spring 24, starting the suction fan 26 in the polishing process, the suction fan 26 can suck dust generated in the polishing process into the uncovered box body 30, and the dust can be retained in the uncovered box body 30 under the action of the filter screen 31, so that the health of workers is facilitated.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a brake pin production facility, includes diaphragm (1), its characterized in that: the supporting legs (2) are fixed at four corners of the bottom of the transverse plate (1), the columns (3) are fixed at four corners of the top of the transverse plate (1), the supporting plates (4) are fixed at four corners of the top of the columns (3), the U-shaped plates (5) are fixed at the tops of the supporting plates (4), the connecting blocks (6) are fixed at inner walls of two sides of each U-shaped plate (5), the two ends of the top of the transverse plate (1) are connected with threaded rods (7) in a rotating mode through bearings, the threaded rods (7) penetrate through the tops of the supporting plates (4), the top ends of the threaded rods (7) are connected with the bottoms of the corresponding connecting blocks (6) in a rotating mode through bearings, driven gears (8) are fixedly sleeved on the surfaces of the threaded rods (7), servo motors (9) are fixed at the tops of the transverse plate (1), driving gears (10) are fixed on, the improved structure of the automobile seat is characterized in that a chain (11) is arranged above the transverse plate (1), the driving gear (10) is in transmission connection with two driven gears (8) through the chain (11), the surface of the threaded rod (7) is connected with a sliding plate (12) through threads, one side wall of the sliding plate (12) is in sliding connection with one side inner wall adjacent to the U-shaped plate (5), the other side wall of the sliding plate (12) is connected with a connecting rod (13) through pin shaft symmetry rotation, the top of the supporting plate (4) is connected with a vertical plate (14) through symmetry sliding, one end, far away from the sliding plate (12), of the connecting rod (13) is connected with one side wall of the adjacent vertical plate (14) through pin shaft rotation, a stepping motor (15) is fixed on one side wall of the vertical plate (14), a pressure plate (16) is fixed on output shafts of the stepping motor (15), a first electric push, the output of first electric putter (17) is fixed with bracket (18), the top of U template (5) is fixed with second electric putter (19), the output of second electric putter (19) runs through the top of U template (5) and is fixed with connecting plate (20), the top symmetry of connecting plate (20) is fixed with T type guide bar (21), the top of T type guide bar (21) all slides through the top of U template (5), the bottom symmetry of connecting plate (20) is fixed with telescope tube (22), the below of connecting plate (20) is provided with mounting panel (23), the bottom of telescope tube (22) all with the top fixed connection of mounting panel (23), the outside of telescope tube (22) all overlaps and is equipped with spring (24), the both ends of spring (24) respectively with the bottom of connecting plate (20) and the top fixed connection of mounting panel (23), the bottom of mounting panel (23) is fixed with abrasive paper (25), the rear of bracket (18) is provided with suction fan (26), the bottom of suction fan (26) and the top fixed connection of backup pad (4), the end of induced drafting of suction fan (26) is fixed with aspiration channel (27), the one end of aspiration channel (27) is fixed with suction hood (28), the air-out end of suction fan (26) is fixed with air-out pipe (29), the top of backup pad (4) is fixed with uncovered box (30), the top of uncovered box (30) is fixed with filter screen (31), the back of uncovered box (30) articulates through the hinge has chamber door (32), the one end and the uncovered box (30) intercommunication of air-out pipe (29).

2. The brake pin production apparatus according to claim 1, wherein: universal auto-lock wheel (33) are all installed to the bottom of supporting leg (2).

3. The brake pin production apparatus according to claim 1, wherein: through holes (34) are symmetrically formed in the top of the supporting plate (4), and the threaded rods (7) penetrate through the corresponding through holes (34) respectively.

4. The brake pin production apparatus according to claim 1, wherein: threaded hole (35) have all been seted up at the top of slide (12), threaded rod (7) and threaded hole (35) threaded connection of corresponding slide (12), a lateral wall of slide (12) is all the symmetry and is fixed with slider (36), spout (37) have all been seted up to the equal symmetry of both sides inner wall of U template (5), slider (36) sliding connection respectively is in corresponding spout (37).

5. The brake pin production apparatus according to claim 1, wherein: the bottom of riser (14) is all the symmetry fixed with T type piece (38), four T type grooves (39) have been seted up to the top symmetry of backup pad (4), T type piece (38) sliding connection respectively is in corresponding T type groove (39).

6. The brake pin production apparatus according to claim 1, wherein: dodging hole (40) have been seted up at the top of U template (5), hole (40) have been dodged in the output of second electric putter (19) run through, guiding hole (41) have been seted up to the top symmetry of U template (5), corresponding guiding hole (41) are run through respectively in T type guide bar (21).

7. The brake pin production apparatus according to claim 1, wherein: and anti-skid grains are arranged on one side wall of the pressure plate (16) far away from the stepping motor (15).

8. The production method of a brake pin production apparatus according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:

s1: firstly, a brake guide pin needing to be polished is placed on a bracket (18), then a first electric push rod (17) is started, and the bracket (18) can be driven by the first electric push rod (17) to move upwards, so that the guide pin can be positioned between two pressure plates (16);

s2: then a servo motor (9) is started, the servo motor (9) can drive a driving gear (10) to rotate, the driving gear (10) can drive two driven gears (8) to rotate through a chain (11), the driven gears (8) can drive corresponding threaded rods (7) to rotate, the threaded rods (7) can drive corresponding sliding plates (12) to move upwards, the sliding plates (12) can drive corresponding vertical plates (14) to move towards the middle, so that the two pressing plates (16) can clamp and fix the guide pins, the stepping motor (15) is started, and the stepping motor (15) can drive the pressing plates (16) to rotate, so that the guide pins can be driven to rotate;

s3, starting the second electric push rod (19), wherein the second electric push rod (19) can drive the connecting plate (20) to move downwards, so that the abrasive paper (25) can be driven to be in close contact with the surface of the guide pin, when the abrasive paper (25) is in contact with the guide pin, the spring (24) is in a compressed state, and the thickness of the guide pin can be thinned in the polishing process, so that the abrasive paper (25) can be always in close contact with the surface of the guide pin under the action of the elastic force of the spring (24), and in the polishing process, the suction fan (26) is started, the suction fan (26) can suck dust generated in the polishing process into the uncovered box body (30), and under the action of the filter screen (31), the dust can be retained in the uncovered box body (30), so that the body health of workers is facilitated.