CN115771096A

CN115771096A - Hardware polishing equipment

Info

Publication number: CN115771096A
Application number: CN202211501711.8A
Authority: CN
Inventors: 文艳玲
Original assignee: Jiangxi Jikaishun Forging Co ltd
Current assignee: Jiangxi Jikaishun Forging Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-03-10

Abstract

The invention discloses hardware polishing equipment and relates to the technical field of hardware machining. This hardware products equipment of polishing is including processing the base, processing base is "U" font setting and inner wall bottom center department is fixed with place the platform, processing base left side and right side all have the link through expansion piece slidable mounting, two be fixed with the push down device between the link, push down the inside expansion joint of having seted up of device, the bottom slip of expansion joint has cup jointed the movable block. This hardware products equipment of polishing can be used to the hardware plate side at place the platform top to polish the operation through setting up processing base, place the platform and polishing, sets up simultaneously and pushes down device, movable mouth, movable block, push type switch and reciprocating motor and can realize carrying out the automatic reciprocating motion of the piece of polishing when the centre gripping to hardware plate to realize automatic centre gripping simultaneously and the effect of polishing, need not the independent operation, very big improvement machining efficiency.

Description

Hardware polishing equipment

Technical Field

The invention relates to the technical field of hardware processing, in particular to hardware product polishing equipment.

Background

Hardware processing generally refers to the processing procedure of metal products, generally includes operations such as cutting, polishing and bending, and in the hardware product polishing process, the polishing operation needs to be realized by continuous friction of a polishing block on the surface of the hardware product.

Patent publication No. CN 215942431U's utility model patent relates to hardware processing technology field, and specifically speaking relates to a hardware processing is with equipment of polishing. The hardware polishing equipment comprises a polishing device and a clamping device connected with the polishing device, wherein the polishing device at least comprises a device shell, the device shell is rotatably connected with a polishing round block through a rotating head arranged at the right end, the clamping device at least comprises a clamping plate, the bottom end of the clamping plate is provided with a lower clamping sheet, the center of the upper surface of the lower clamping sheet is provided with a lower clamping table, the top end of the clamping plate is provided with an upper clamping sheet, the lower surface of the upper clamping sheet is provided with an upper clamping table, in the hardware polishing equipment, hardware can be conveniently clamped through the arranged clamping device, the hardware can be polished through the arranged polishing device, and the clamped hardware can be conveniently polished in multiple directions through rotation between the polishing device and the clamping device;

although above-mentioned hardware processing is with equipment of polishing can realize carrying out the centre gripping to the hardware and polishing the effect, its mode that adopts the centre gripping and polish the independent operation carries out the operation, consequently the time that consumes when polishing the hardware side is longer, especially when polishing in proper order a plurality of hardware, can seriously influence the efficiency of polishing, has certain defect.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides hardware product polishing equipment, which solves the problems in the background technology.

(II) technical scheme

In order to realize the purpose, the invention is realized by the following technical scheme: the utility model provides a hardware products equipment of polishing, includes the processing base, the processing base is "U" font setting and inner wall bottom center department is fixed with place the platform, processing base left side and right side all have the link, two through expansion piece slidable mounting be fixed with between the link and push down the device, push down the inside expansion joint that has seted up of device, the bottom slip of expansion joint has cup jointed the movable block, and the inside movable block of pushing down the device can realize the location centre gripping effect to hardware plate, the push type switch is installed at the top of expansion joint, push type on-off control end is located the bottom, and the side electric connection of push type switch has reciprocating motor, and the steerable reciprocating motor of push type switch is opened and is closed, and when the control end of push type switch was pressed, reciprocating motor opened, when the control end of push type switch was not pressed. Control end resets and reciprocating motor self-closing, reciprocating motor's front side and rear side all are provided with the output, and two output of reciprocating motor all cup joint at the drive shaft surface to the activity from top to bottom, the drive shaft bottom is fixed with the piece of polishing, and the reciprocating motor output shaft can drive the drive shaft and carry out reciprocating motion, and the drive shaft drives the piece reciprocating motion of polishing to the realization is reciprocal to polish to hardware plate's side, to slidable mounting at processing base top about the piece of polishing.

Preferably, in order to realize the reciprocal effect of polishing of the piece of polishing, the piece of polishing includes slider and U-shaped polishing board, slider slidable mounting is at processing base top and fixed with the drive shaft, the U-shaped polishing board is fixed in the slider one side that is close to place the platform.

Preferably, in order to improve the polishing effect of the polishing equipment to the side surface of the hardware plate, the polishing range of the polishing equipment is simultaneously improved, the clamping and polishing effects are prevented from being influenced when the size of the hardware plate needing polishing changes, a movable cavity is formed in the center of the inside of the U-shaped polishing plate, a reinforcing mechanism is arranged inside the movable cavity and comprises a reinforcing polishing plate, an arc-shaped sheet, a connecting rod and a driving plate, the reinforcing polishing plate is in the same shape as the U-shaped polishing plate, the outer side of the polishing plate is in contact with the inner side of the U-shaped polishing plate, two ends of the arc-shaped sheet are fixed inside the movable cavity, the center of a concave surface in the arc-shaped sheet is fixed with one end of the connecting rod, the other end of the connecting rod is fixed at the center of the outer side of the reinforcing polishing plate, the bottom of the driving plate is in contact with the top of the outer convex surface of the arc-shaped sheet, the driving plate is slidably and is arranged at the position between the top of the U-shaped polishing plate and the movable cavity, a lower pushing plate is fixed at the output end of a reciprocating motor.

Preferably, in order to realize the control effect of the drive plate on the arc-shaped sheet, the edge of the bottom of the drive plate is provided with a circular chamfer, and the center of the outer convex surface of the arc-shaped sheet is in contact with the inner wall of the movable cavity.

Preferably, in order to blow off chips inside the reinforced polishing plate and prevent the reinforced polishing plate from being influenced by residual polishing chips inside the reinforced polishing plate and subsequent polishing effects, a U-shaped frame is arranged at the bottom of the lower push plate, a driving air cavity is formed in the driving plate, an exhaust mechanism is arranged inside the driving air cavity and comprises two rotating pieces and an elastic air bag, the tops of the two rotating pieces are hinged and installed inside the driving air cavity, the elastic air bag is located between the two rotating pieces, the outer wall of the elastic air bag is fixed to one side, close to the two rotating pieces, of the side, an opening is formed in the bottom of the driving air cavity, an air outlet end is arranged at the bottom of the elastic air bag and located inside the opening in the bottom of the driving air cavity, an air flow channel is formed in the arc pieces, the connecting rod and the reinforced polishing plate in a penetrating mode, an opening is formed in the outer convex surface of the arc pieces, and the other end of the exhaust hole formed in the inner side of the reinforced polishing plate is communicated with the exhaust hole.

Preferably, in order to realize the control effect of the U-shaped frame on the rotation of the rotating sheet, the rotating sheet comprises an inclined part and a vertical part, the top end of the inclined part is hinged with the inner wall of the driving air cavity and is positioned below one end of the U-shaped frame, and the vertical part is fixed with the elastic air bag.

Preferably, in order to utilize the U-shaped board reciprocating motion of polishing to realize the effect of knocking to U-shaped board bottom of polishing, should strike vibration transmission and can improve clastic discharge effect to reinforcing board inside of polishing, the below of U-shaped board of polishing is provided with vibrating device, vibrating device is including drive cylinder, elastic plate and the strip of knocking, the drive cylinder is fixed in processing base inboard, the elastic plate both ends are installed in the support bottom, and the elastic plate bottom is the evagination face, it is fixed with the interior concave surface of elastic plate to strike the strip.

Preferably, the removal effect at both ends is not influenced when realizing the elastic plate deformation, the outer convex surface of elastic plate bottom is located between two drive cylinders, and the outer convex surface of elastic plate and drive cylinder contact, the support is fixed in the U-shaped board bottom of polishing, elastic plate endpoint department and support sliding connection.

(III) advantageous effects

The invention provides hardware polishing equipment. The method has the following beneficial effects:

(1) This hardware products equipment of polishing can be used to the hardware plate side at place the platform top through setting up processing base, place the platform and the piece of polishing operation of polishing, sets up simultaneously and pushes down device, movable mouth, movable block, push type switch and reciprocating motor and can realize carrying out the automatic reciprocating motion of the piece of polishing when the centre gripping to hardware plate to realize automatic centre gripping simultaneously and the effect of polishing, need not the independent operation, very big improvement machining efficiency.

(2) This hardware products equipment of polishing can realize the effect of polishing to hardware plate spare through setting up the reinforcing board of polishing, can utilize reciprocating motor decline in-process to realize adjusting the position of reinforcing board of polishing through setting up the arc piece, connecting rod and drive plate for the reinforcing board of polishing closely pastes hardware plate spare side, thereby can improve the effect of polishing, also can play the effect of automatic centre gripping, influences the effect of polishing when preventing to polish the hardware plate spare of other sizes.

(3) This hardware polishing equipment can utilize down pushing plate and the moving down of U-shaped frame to realize the air feed operation through setting up rotor plate and elasticity gasbag, and the air feed in-process gaseous can be discharged to the reinforcing through exhaust hole and polish inboard and hardware plate contact site to make the contact site polish the piece that produces and be blown off, prevent that this piece of polishing from leading to the hardware plate surface to produce the mar and influence the effect of polishing at the in-process of polishing.

(4) This hardware products equipment of polishing can utilize the reciprocating motion of U-shaped grinding plate to realize the effect of knocking to the U-shaped grinding plate bottom through setting up drive cylinder, elastic plate and knocking the strip to realize strengthening the inside clastic effect of droing of polishing of grinding plate, and then improve the discharge velocity of polishing clastic, reduce the influence of polishing piece to the effect of polishing.

Drawings

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

FIG. 2 is a partial cross-sectional view of a hold-down device according to the present invention;

FIG. 3 is a schematic view of a polishing member according to the present invention;

FIG. 4 is a schematic view of the exhaust mechanism of the present invention;

FIG. 5 is an enlarged view of the portion A of FIG. 4 according to the present invention;

FIG. 6 is a schematic view of the overall multi-angle structure of the present invention;

FIG. 7 is an enlarged view of portion B of FIG. 6 according to the present invention.

In the figure: 1. processing a base; 2. placing a platform; 3. a connecting frame; 4. a pressing device; 41. a movable opening; 42. a movable block; 43. a push switch; 5. a reciprocating motor; 51. a drive shaft; 52. a lower push plate; 521. a U-shaped frame; 6. polishing the workpiece; 61. a slider; 62. a U-shaped sanding plate; 7. a reinforcing mechanism; 71. reinforcing the polishing plate; 711. an exhaust hole; 72. an arc-shaped sheet; 73. a connecting rod; 74. a drive plate; 8. an exhaust mechanism; 81. a rotating sheet; 82. an elastic air bag; 9. a vibrating device; 91. a drive cylinder; 92. an elastic plate; 921. a support; 93. the strip is knocked.

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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a hardware product equipment of polishing, including processing base 1, processing base 1 is the setting of "U" font and inner wall bottom center department is fixed with place the platform 2, all there are link 3 through expansion piece slidable mounting on processing base 1 left side and right side, be fixed with down the device 4 between two link 3, the inside expansion joint 41 of having seted up of down the device 4, the bottom of expansion joint 41 slides and has cup jointed the movable block 42, the inside movable block 42 of down-pressing device 4 can realize the location centre gripping effect to hardware plate, push type switch 43 is installed at the top of expansion joint 41, push type switch 43 control end is located the bottom, and push type switch 43's side electric connection has reciprocating motor 5, push type switch 43 steerable reciprocating motor 5 is opened and is closed, when push type switch 43's control end is pressed, reciprocating motor 5 is opened, when push type switch 43's control end is not pressed. Control end resets and reciprocating motor 5 self-closing, reciprocating motor 5's front side and rear side all are provided with the output, and two outputs of reciprocating motor 5 all cup joint at the drive shaft 51 surface to the activity from top to bottom, the drive shaft 51 bottom is fixed with polishing 6, reciprocating motor 5 output shaft can drive shaft 51 and carry out reciprocating motion, drive shaft 51 drives polishing 6 reciprocating motion, thereby realize reciprocating the polishing to hardware plate's side, polishing 6 controls to slidable mounting at processing base 1 top.

In this embodiment, in order to realize the reciprocating polishing effect of the polishing member 6, the polishing member 6 comprises a sliding block 61 and a U-shaped polishing plate 62, the sliding block 61 is slidably mounted on the top of the processing base 1 and fixed with the driving shaft 51, and the U-shaped polishing plate 62 is fixed on one side of the sliding block 61 close to the placing platform 2.

In this embodiment, in order to improve the polishing effect of this polishing device to the side of the hardware plate, simultaneously improve the polishing range of this polishing device, influence the effect of centre gripping and polishing when preventing the size of the hardware plate that needs to polish from changing, movable chamber has been seted up to the inside center department of U-shaped polishing plate 62, movable chamber inside is provided with reinforcing mechanism 7, reinforcing mechanism 7 includes reinforcing polishing plate 71, arc piece 72, connecting rod 73 and drive plate 74, reinforcing polishing plate 71 shape is the same with U-shaped polishing plate 62, and reinforcing polishing plate 71 outside and the inboard contact of U-shaped polishing plate 62, the both ends of arc piece 72 are fixed inside the movable chamber, and arc piece 72 concave surface center department is fixed with connecting rod 73 one end, the other end of connecting rod 73 is fixed in reinforcing polishing plate 71 outside center department, drive plate 74 bottom and the contact of arc piece 72 outer convex surface top, and drive plate 74 slides and runs through the position of installing between U-shaped polishing plate 62 top and movable chamber, drive plate 74 top is provided with lower push plate 52, push plate 52 is fixed on reciprocating motor 5 output.

In the embodiment, in order to realize the control effect of the drive plate 74 on the arc-shaped sheet 72, the edge of the bottom of the drive plate 74 is provided with a round chamfer, and the center of the outer convex surface of the arc-shaped sheet 72 is in contact with the inner wall of the movable cavity.

In this embodiment, in order to blow off the internal debris of the enhanced polishing plate 71 in the process of moving down the lower pushing plate 52 to push the driving plate 74 to move, thereby preventing the internal debris of the enhanced polishing plate 71 from remaining and affecting the subsequent polishing effect, a U-shaped frame 521 is arranged at the bottom of the lower pushing plate 52, a driving air cavity is formed in the driving plate 74, an exhaust mechanism 8 is arranged in the driving air cavity, the exhaust mechanism 8 comprises two rotating pieces 81 and an elastic air bag 82, the tops of the two rotating pieces 81 are all hinged and installed in the driving air cavity, the elastic air bag 82 is located between the two rotating pieces 81, the outer wall of the elastic air bag is fixed on the side close to the two rotating pieces 81, an opening is formed at the bottom of the driving air cavity, an air outlet end is arranged at the bottom of the elastic air bag 82 and located in the opening at the bottom of the driving air cavity, an air flow channel is formed inside the arc piece 72, the connecting rod 73 and the enhanced polishing plate 71 in a penetrating manner, one end of the air flow channel is provided with an opening on the outer convex surface of the arc piece 72, and the other end of the exhaust hole 711 formed in the inner side of the enhanced polishing plate 71.

In this embodiment, in order to achieve the effect of controlling the rotation of the rotating piece 81 by the U-shaped frame 521, the rotating piece 81 includes an inclined portion and a vertical portion, the top end of the inclined portion is hinged to the inner wall of the driving air cavity and is located below one end of the U-shaped frame 521, and the vertical portion is fixed with the elastic air bag 82.

In this embodiment, in order to utilize U-shaped board 62 reciprocating motion to realize the effect of strikeing to the U-shaped board 62 bottom of polishing, should strike vibration transmission and can improve clastic discharge effect to reinforcing board 71 inside of polishing, the below of U-shaped board 62 of polishing is provided with vibrating device 9, vibrating device 9 includes drive cylinder 91, elastic plate 92 and strikes strip 93, drive cylinder 91 is fixed in processing base 1 inboard, install in support 921 bottom at elastic plate 92 both ends, and elastic plate 92 bottom is the evagination face, it is fixed with the interior concave surface of elastic plate 92 to strike strip 93.

In this embodiment, in order to realize that the moving effect of the two ends is not affected when the elastic plate 92 deforms, the outer convex surface of the bottom of the elastic plate 92 is located between the two driving cylinders 91, the outer convex surface of the elastic plate 92 contacts with the driving cylinders 91, the support 921 is fixed at the bottom of the U-shaped polishing plate 62, and the end point of the elastic plate 92 is connected with the support 921 in a sliding manner.

In the specific implementation process of the embodiment, the working principle is as follows: placing a hardware plate on the top of a placing platform 2, inserting the side face of the hardware plate into two polishing pieces 6 at the moment, manually pressing down a pressing device 4, driving a connecting frame 3 to descend by the pressing device 4, when a movable block 42 moves to be in contact with the hardware plate, blocking the movable block 42 by the hardware plate, stopping the movement of the movable block 42, and continuously driving a pressing switch 43 to descend by the pressing device 4, so that the top of the movable block 42 can push a control end of the pressing switch 43 to ascend, the pressing switch 43 controls a reciprocating motor 5 to be opened, an output shaft of the reciprocating motor 5 drives a driving shaft 51 to reciprocate, the driving shaft 51 drives a sliding block 61 and a U-shaped polishing plate 62 to reciprocate, and the U-shaped polishing plate 62 can polish the side face of the hardware plate in a reciprocating manner, so as to realize full-automatic clamping and polishing effects;

the reciprocating motor 5 can drive the lower push plate 52 to descend in the descending process, the lower push plate 52 pushes the drive plate 74 to descend, the bottom end of the drive plate 74 can be in contact with the arc-shaped sheet 72 and pushes the arc-shaped sheet 72 to deform in the descending process, the center of the arc-shaped sheet 72 can drive one end of the connecting rod 73 to move in the deformation process, the other end of the connecting rod 73 pushes the reinforced polishing plate 71 to move, and the reinforced polishing plate 71 moves towards the hardware plate and is in full contact with the hardware plate, so that the full contact polishing effect on the hardware plate is achieved, and the contact polishing effect is prevented from being influenced when the size of the hardware plate changes slightly; the lower push plate 52 descends and simultaneously drives the U-shaped frame 521 to descend, when the U-shaped frame 521 contacts with the inclined part of the elastic air bag 82, the inclined part of the elastic air bag 82 is pushed to rotate, at the moment, the bottom ends of the two elastic air bags 82 rotate towards the direction close to each other, therefore, the two elastic air bags 82 extrude the rotating sheet 81, air in the rotating sheet 81 flows into the air flow channel through the driving air cavity and is exhausted through the air flow channel and the exhaust hole 711, and the air flow exhausted through the exhaust hole 711 acts on the part between the hardware plate and the inner side of the reinforced grinding plate 71 so as to exhaust grinding debris on the inner side of the reinforced grinding plate 71;

the in-process of the plate 62 reciprocating motion that polishes of U-shaped can drive the reciprocating motion of elastic plate 92 through support 921, this in-process drive cylinder 91 can contradict bottom the elastic plate 92 and promote the deformation of elastic plate 92, the central department promotes and beats strip 93 and rise in the deformation in-process of elastic plate 92, it can beat the U-shaped plate 62 bottom of polishing to beat the ascending in-process of strip 93, the produced vibration of this striking can transmit to the reinforcing and polish on the board 71, thereby make the reinforcing and polish the piece that produces and drop on the board 71, prevent to polish that the piece from attaching to the influence effect of polishing for a long time.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hardware equipment of polishing, includes processing base (1), its characterized in that: processing base (1) is "U" font setting and inner wall bottom center department and is fixed with place the platform (2), processing base (1) left side and right side all have link (3), two through extensible member slidable mounting be fixed with between link (3) and push down device (4), push down device (4) inside has seted up expansion joint (41), the bottom of expansion joint (41) slides and has cup jointed movable block (42), push type switch (43) are installed at the top of expansion joint (41), push type switch (43) control end is located the bottom, and the side electric connection of push type switch (43) has reciprocating motor (5), the front side and the rear side of reciprocating motor (5) all are provided with the output, and two outputs of reciprocating motor (5) all cup joint at drive shaft (51) surface to the activity from top to bottom, drive shaft (51) bottom is fixed with polishing element (6), polishing element (6) are controlled to slidable mounting at processing base (1) top about polishing element (6).

2. The hardware grinding device according to claim 1, characterized in that: polishing piece (6) include slider (61) and U-shaped board (62) of polishing, slider (61) slidable mounting is fixed at processing base (1) top and with drive shaft (51), U-shaped board (62) of polishing are fixed in slider (61) one side that is close to place the platform (2).

3. The hardware grinding device according to claim 2, characterized in that: the U-shaped polishing plate (62) is provided with a movable cavity at the center, a reinforcing mechanism (7) is arranged in the movable cavity, the reinforcing mechanism (7) comprises a reinforcing polishing plate (71), an arc-shaped sheet (72), a connecting rod (73) and a driving plate (74), the shape of the reinforcing polishing plate (71) is the same as that of the U-shaped polishing plate (62), the outer side of the reinforcing polishing plate (71) is in contact with the inner side of the U-shaped polishing plate (62), the two ends of the arc-shaped sheet (72) are fixed in the movable cavity, the center of the inner concave surface of the arc-shaped sheet (72) is fixed to one end of the connecting rod (73), the other end of the connecting rod (73) is fixed to the center of the outer side of the reinforcing polishing plate (71), the bottom of the driving plate (74) is in contact with the top of the outer convex surface of the arc-shaped sheet (72), the driving plate (74) is slidably penetrated through the position between the top of the U-shaped polishing plate (62) and the movable cavity, the driving plate (74), a lower pushing plate (52) is arranged above the driving plate (74), and the lower pushing plate (52) is fixed to the output end of a reciprocating motor (5).

4. The hardware grinding device according to claim 3, characterized in that: the edge of the bottom of the driving plate (74) is provided with a round chamfer, and the center of the outer convex surface of the arc-shaped sheet (72) is in contact with the inner wall of the movable cavity.

5. The hardware grinding equipment according to claim 3, characterized in that: the lower push plate (52) bottom is equipped with U-shaped frame (521), the drive air cavity has been seted up to the inside of drive plate (74), and the inside of drive air cavity is provided with exhaust mechanism (8), exhaust mechanism (8) include two rotatable lamella (81) and one elastic air bag (82), two the top of rotatable lamella (81) is all articulated to be installed inside the drive air cavity, elastic air bag (82) are located between two rotatable lamella (81) and the outer wall is fixed with the close one side of two rotatable lamella (81), and drive air cavity bottom is equipped with the opening, elastic air bag (82) bottom is equipped with the end of giving vent to anger and gives vent to anger the inside of the opening of end position in drive air cavity bottom, arc piece (72), connecting rod (73) and reinforcing board (71) inside run through and have seted up airflow channel, and airflow channel one end is provided with the opening at arc piece (72) evagination face, and the other end and set up exhaust hole (711) intercommunication in reinforcing board (71) inboard.

6. The hardware grinding device according to claim 5, characterized in that: the rotating piece (81) comprises an inclined part and a vertical part, the top end of the inclined part is hinged with the inner wall of the driving air cavity and is positioned below one end of the U-shaped frame (521), and the vertical part is fixed with the elastic air bag (82).

7. The hardware grinding device according to claim 3, characterized in that: the U-shaped polishing plate is characterized in that a vibrating device (9) is arranged below the U-shaped polishing plate (62), the vibrating device (9) comprises a driving cylinder (91), an elastic plate (92) and a knocking strip (93), the driving cylinder (91) is fixed on the inner side of the processing base (1), two ends of the elastic plate (92) are installed at the bottom of the support (921), the bottom of the elastic plate (92) is an outer convex surface, and the knocking strip (93) is fixed with the inner concave surface of the elastic plate (92).

8. The hardware grinding device according to claim 7, characterized in that: the outer convex surface of elastic plate (92) bottom is located between two drive cylinder (91), and the outer convex surface of elastic plate (92) contacts with drive cylinder (91), support (921) are fixed in U-shaped board (62) bottom of polishing, elastic plate (92) endpoint department and support (921) sliding connection.