CN218927408U

CN218927408U - Polishing buffer structure and polishing device

Info

Publication number: CN218927408U
Application number: CN202222834464.5U
Authority: CN
Inventors: 李铮; 温贤
Original assignee: Kemeng Wind Power Equipment Tangshan Co ltd
Current assignee: Kemeng Wind Power Equipment Tangshan Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-04-28
Anticipated expiration: 2032-10-26

Abstract

The utility model relates to the technical field of industrial polishing, in particular to a polishing buffer structure and a polishing device. The utility model provides a polishing buffer structure which comprises a shell, a lower supporting plate, an upper floating body and a lower floating body, wherein the lower end of the shell is in an opening shape, a cavity is formed in the shell, the lower supporting plate is connected to the lower surface of the shell, and a supporting plate cavity communicated with the cavity is formed on the lower supporting plate; the upper floating body is arranged in the cavity, and the upper floating body is arranged between the top of the shell and the lower supporting plate through a plurality of elastic pieces, so that the upper floating body can float up and down in the cavity. The polishing buffer structure can be applied to mechanical arm polishing, when irregular flash, cutting tumor and high points are polished, the reaction force is counteracted by the elastic piece and is not directly conducted onto the mechanical arm, so that a polishing tool is protected, and the burden of the mechanical arm is also reduced.

Description

Polishing buffer structure and polishing device

Technical Field

The utility model relates to the technical field of industrial polishing, in particular to a polishing buffer structure and a polishing device.

Background

In industrial production, polishing operation is very common, and most of the conventional polishing modes are manual polishing. While manual sanding suffers from a number of drawbacks such as: sparks, dust, noise and the like generated during polishing affect the physical and mental health of people, the processing quality is difficult to control, and the labor cost is high. Therefore, in order to solve the problems, some factories currently mount polishing tools on the mechanical arms for polishing, robot polishing can effectively improve the control of the processing quality, the processing time efficiency is higher, and the damage to human bodies is reduced.

However, the following problems still remain:

when irregular flash, cutting tumor and high points are polished, impact can be generated on the mechanical arm and the polishing cutter, and the service lives of the mechanical arm and the polishing cutter are seriously influenced.

Disclosure of Invention

The utility model solves the problems that: when irregular flash, cutting tumor and high points are polished, impact can be generated on the mechanical arm and the polishing cutter, and the service lives of the mechanical arm and the polishing cutter are influenced.

(II) technical scheme

A sanding buffer structure comprising: the device comprises a shell, a lower supporting plate, an upper floating body and a lower floating body, wherein the lower end of the shell is in an opening shape, a cavity is formed in the shell, the lower supporting plate is connected to the lower surface of the shell, and a supporting plate cavity communicated with the cavity is formed on the lower supporting plate;

the upper floating body is arranged in the cavity, the upper floating body is arranged between the top of the shell and the lower supporting plate through a plurality of elastic connecting pieces, so that the upper floating body can float up and down in the cavity, the lower floating body is positioned in the cavity and is lapped on the lower supporting plate, and a part of the lower floating body extends out of the supporting plate cavity;

the upper surface of the lower floating body is provided with a lower permanent magnet, the lower surface of the upper floating body is provided with an upper permanent magnet which is attracted with the lower permanent magnet, the lower floating body is provided with a blocking piece, and the upper surface of the blocking piece is propped against the lower surface of the upper floating body, so that a gap is reserved between the upper permanent magnet and the lower permanent magnet.

According to one embodiment of the utility model, the shell is in a bottle cap shape, the lower supporting plate is a circular plate, and the inner diameter of the lower supporting plate is smaller than that of the shell.

According to one embodiment of the utility model, the elastic connection member includes an upper elastic member mounted between an upper surface of the upper floating body and a top of the housing, and a lower elastic member mounted between a lower surface of the upper floating body and an upper surface of the lower pallet.

According to one embodiment of the utility model, the lower floating body comprises a lower disc body and an upper disc body connected to the upper surface of the lower disc body, the lower disc body and the upper disc body are both disc-shaped, the axes of the lower disc body and the upper disc body are in the same straight line, the diameter of the upper disc body is larger than that of the lower disc body, the diameter of the upper disc body is larger than the inner diameter of the lower supporting plate, and the diameter of the lower disc body is smaller than the inner diameter of the lower supporting plate.

According to one embodiment of the utility model, the upper surface of the upper disc body is provided with a second groove, the lower surface of the blocking piece is fixed in the second groove, the lower surface of the upper floating body is provided with a first groove, the upper surface of the blocking piece is contacted with the first groove, and the diameter of the blocking piece is smaller than that of the first groove.

According to one embodiment of the utility model, the shell comprises an upper cover plate and a side ring plate, wherein the side ring plate is fixed on the lower surface of the upper cover plate, the upper cover plate and the side ring plate are fixed through a plurality of fourth bolts, and the side ring plate and the lower supporting plate are fixed through first bolts.

According to one embodiment of the utility model, the inner wall of the side ring plate is fixed with a guide block, the inner side of the guide block is provided with a guide groove, the side surface of the upper floating body is provided with a sliding block, and the sliding block slides in the guide groove along the length direction of the guide block.

According to one embodiment of the utility model, the lower surface of the upper floating body is provided with a first mounting groove, the upper surface of the lower floating body is provided with a second mounting groove, the upper permanent magnet is fixed in the first mounting groove through a second bolt, and the lower permanent magnet is fixed in the second mounting groove through a third bolt.

According to one embodiment of the utility model, the upper surface of the shell is provided with a flange, and the lower surface of the lower floating body is provided with a clamping device.

The polishing device comprises the polishing buffer structure, the mechanical arm and the polishing tool, wherein the polishing buffer structure is arranged on the mechanical arm, and the polishing tool is arranged on the lower surface of the lower floating body.

The utility model has the beneficial effects that:

the utility model provides a polishing buffer structure, which comprises: the upper floating body is installed between the top of the shell and the lower supporting plate through a plurality of elastic pieces, so that the upper floating body can float up and down in the cavity, a lower permanent magnet is installed on the upper surface of the lower floating body, and an upper permanent magnet attracted with the lower permanent magnet is installed on the lower surface of the upper floating body. This buffering structure of polishing can be applied to the arm and polishes, when polishing irregular overlap, cutting tumor, high point, can give the instrument of polishing an ascending reaction force, the elastic component at shell top is compressed, and the elastic component at bottom plate top is stretched, make last floating body and lower floating body shift up, and break away from after the high point, the elastic component resumes the original state, make last floating body and lower floating body resume the normal position, thereby reach the effect that motion was buffered and the position was retrieved, the reaction force is offset by the elastic component, also not direct conduction is to the arm on, just protected the instrument of polishing, also alleviateed the burden of arm.

In addition, can give the polishing tool a reverse effort simultaneously in the horizontal direction, go up permanent magnet and lower permanent magnet and can squint certain distance, and then provide certain cushioning effect for the polishing tool, the rigid contact altitude between the polishing tool does not, because the mutual magnetic force effect between last permanent magnet and the lower permanent magnet, go up permanent magnet and lower permanent magnet and can be fast automatic centering and resume the normal position again, realize motion buffering and the effect of position recovery.

The polishing device comprises a polishing buffer structure, a mechanical arm and a polishing tool, wherein the polishing buffer structure is arranged on the mechanical arm, the polishing tool is arranged on the lower surface of the lower floating body, and after the polishing buffer structure is used, the polishing tool is protected, and the burden of the mechanical arm is also reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a polishing buffer structure provided by an embodiment of the present utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1, provided in accordance with an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of an upper floating body provided by an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a lower floating body provided by an embodiment of the present utility model;

fig. 5 is a schematic diagram of a polishing structure according to an embodiment of the present utility model.

Icon: 1-an upper cover plate; 2-side ring plates; 3-a lower supporting plate; 4-upper floating body; 401-a first mounting groove; 402-top hole; 403-bottom hole; 404-a first groove; 5-a lower floating body; 501-a lower disc body; 502-upper tray body; 503-a second groove; 6-upper permanent magnet; 7-a lower permanent magnet; 8-clamping device; 9-a barrier; 10-lower elastic member; 11-flanges; 12-a guide block; 13-a first bolt; 14-a second bolt; 15-a third bolt; 16-a mechanical arm; 17-a grinding tool; 18-a workbench; 19-fourth bolt.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 5, an embodiment of the present utility model provides a polishing buffer structure, including: the device comprises a shell, a lower supporting plate 3, an upper floating body 4 and a lower floating body 5, wherein the lower end of the shell is in an opening shape, a cavity is formed in the shell, the lower supporting plate 3 is connected to the lower surface of the shell, and a supporting plate cavity communicated with the cavity is formed on the lower supporting plate 3;

the upper floating body 4 is arranged in the cavity, the upper floating body 4 is arranged between the top of the shell and the lower supporting plate 3 through a plurality of elastic connecting pieces, so that the upper floating body 4 can float up and down in the cavity, the lower floating body 5 is positioned in the cavity and is lapped on the lower supporting plate 3, and part of the lower floating body 5 extends out of the supporting plate cavity;

the upper floating body 4 is suspended between the top of the shell and the lower supporting plate 3, the elastic piece at the top of the shell pulls the upper floating body 4, the elastic piece at the top of the lower supporting plate 3 supports the upper floating body 4, when polishing a high point, an upward reaction force is given to the polishing tool 17, meanwhile, the action force acts on the lower floating body 5 and the upper floating body 4, the upper floating body 4 and the lower floating body 5 move upwards, the elastic piece at the top of the shell is compressed, the elastic piece at the top of the lower supporting plate 3 is stretched, when the high point is not contacted with the polishing tool 17 any more, the upper floating body 4 and the lower floating body move back to the original positions due to the downward pulling force of the elastic piece at the top of the lower supporting plate 3 and the downward acting force of the elastic piece at the top of the shell, meanwhile, the reaction force is not conducted to the mechanical arm 16 due to the shock absorption effect of the elastic piece, the effects of buffering up-down movement and position recovery are achieved, and the damage to the mechanical arm 16 and the polishing tool 17 in the up-down direction are reduced.

The upper surface of the lower floating body 5 is provided with a lower permanent magnet 7, the lower surface of the upper floating body 4 is provided with an upper permanent magnet 6 attracted with the lower permanent magnet 7, the lower floating body 5 is provided with a blocking piece 9, and the upper surface of the blocking piece 9 is propped against the lower surface of the upper floating body 4, so that a gap is reserved between the upper permanent magnet 6 and the lower permanent magnet 7.

When the horizontal direction of the workpiece has high points, flash and cutting tumors, the polishing tool 17 can receive a reverse acting force to cause the lower floating body 5 to move along the direction of the reverse acting force, the upper permanent magnet 6 and the lower permanent magnet 7 can deviate a certain distance, and further a certain buffer effect is provided for the polishing tool 17, and due to the interaction of the magnetic force between the upper permanent magnet 6 and the lower permanent magnet 7, the upper permanent magnet 6 and the lower permanent magnet 7 can be quickly automatically centered and restored to the original position, so that the lower floating body 5 can automatically restore to the original position, and the effects of motion buffering and position restoration are realized.

As a specific embodiment, the shell is in a bottle cap shape, the lower supporting plate 3 is a circular ring plate, the inner diameter of the lower supporting plate 3 is smaller than the inner diameter of the shell, the upper floating body 4 is cylindrical, the lower floating body 5 is two cylinders stacked together, the shell comprises an upper cover plate 1 and a side ring plate 2, the upper cover plate 1 is a circular plate, the side ring plate 2 is tubular, the side ring plate 2 is fixed on the lower surface of the upper cover plate 1, the upper cover plate 1 and the side ring plate 2 are fixed through a plurality of fourth bolts 19, and the side ring plate 2 and the lower supporting plate 3 are fixed through first bolts 13. Specifically, a plurality of concave holes are formed in the edge of the upper surface of the upper cover plate 1, the concave holes do not penetrate through the upper cover plate 1, a plurality of screw holes are formed in the upper surface of the side ring plate 2, so that the fourth bolt 19 is inserted into the concave holes and then rotated, the fourth bolt 19 is gradually screwed into the side ring plate 2, and the upper cover plate 1 and the side ring plate 2 are fixed;

the edge of the lower surface of the lower support plate 3 is provided with a plurality of round holes, the round holes do not penetrate through the lower support plate 3, the lower surface of the side ring plate 2 is provided with a plurality of screw holes, the first bolts 13 are inserted into the lower support plate 3 and then rotated, the first bolts 13 are screwed into the side ring plate 2 between the first bolts 13, and the side ring plate 2 and the lower support plate 3 are fixed.

As a specific embodiment, the lower floating body 5 includes a lower disc 501 and an upper disc 502 connected to the upper surface of the lower disc 501, where the lower disc 501 and the upper disc 502 are integrally formed, the lower disc 501 and the upper disc 502 are both disc-shaped, the axes of the lower disc 501 and the upper disc 502 are in the same straight line, the diameter of the upper disc 502 is greater than that of the lower disc 501, the diameter of the upper disc 502 is greater than that of the inner diameter of the lower support plate 3, and the diameter of the lower disc 501 is less than that of the lower support plate 3, so that the upper disc 502 is placed on the lower support plate 3 and can slide on the lower support plate 3, and the lower disc 501 passes through the lower support plate 3, forming an annular cavity between the lower disc 501 and the lower support plate 3, and when the lower disc 501 moves, the lower disc 501 moves in the annular cavity and does not abut against the edge of the lower support plate 3.

As a specific embodiment, the elastic connecting piece comprises an upper elastic piece and a lower elastic piece 10, the upper elastic piece and the lower elastic piece 10 are springs, the upper elastic piece is arranged between the upper surface of the upper floating body 4 and the top of the shell, the lower elastic piece 10 is arranged between the lower surface of the upper floating body 4 and the upper surface of the lower supporting plate 3, four mounting holes are formed in the circumference of the lower surface of the upper cover plate 1 at equal intervals, four top holes 402 are formed in the edge of the upper surface of the upper floating body 4 at equal intervals, the positions of the top holes 402 and the mounting holes are corresponding, the upper end of the upper elastic piece is welded in the mounting holes, and the lower end of the upper elastic piece is welded in the top holes 402; a plurality of mounting holes are formed in the circumference of the upper surface of the lower support plate 3 at equal intervals, four bottom holes 403 are formed in the edge of the lower surface of the upper floating body 4 at equal intervals, the top ends of the lower elastic members 10 are welded to the bottom holes 403, and the bottom ends of the lower elastic members are welded to the mounting holes in the lower support plate 3.

As a specific embodiment, the lower surface of the upper floating body 4 is provided with a first mounting groove 401, the upper surface of the lower floating body 5 is provided with a second mounting groove, the upper permanent magnet 6 is fixed in the first mounting groove 401 through a second bolt 14, the lower permanent magnet 7 is fixed in the second mounting groove through a third bolt 15, the first mounting groove 401 and the second mounting groove are circular grooves, the diameters and the depths of the first mounting groove 401 and the second mounting groove are the same, the axes of the first mounting groove 401 and the second mounting groove are on the same straight line, and the specifications of the upper permanent magnet 6 and the lower permanent magnet 7 are the same and are disc permanent magnets. In addition, a hole penetrating through the upper floating body 4 is formed in the central position of the upper floating body 4, the hole is divided into an upper part and a lower part, the diameter of the upper part is larger than that of the lower part, the bolt head of the second bolt 14 is positioned in the upper hole, and the screw rod of the second bolt 14 penetrates out of the hole of the lower part and is screwed into a screw hole formed in the central position of the upper permanent magnet 6, so that the upper permanent magnet 6 can be conveniently installed and detached at any time, and later replacement is facilitated. The lower permanent magnet 7 is installed in the same manner as the upper permanent magnet 6, and will not be described again.

As a specific embodiment, the upper surface of the upper disc 502 is provided with the second groove 503, the lower surface of the blocking member 9 is fixed in the second groove 503, the lower surface of the upper floating body 4 is provided with the first groove 404, the upper surface of the blocking member 9 contacts with the first groove 404, it should be noted that the blocking member 9 is a thrust bearing, the height of the thrust bearing is greater than the sum of the depths of the first groove 404 and the second groove 503, and the diameter of the thrust bearing is smaller than the diameter of the first groove 404, leaving a certain offset distance for the thrust bearing.

As a specific embodiment, unlike the above embodiment, in this embodiment, the blocking member 9 is a cylindrical rod, the upper surface of the upper disc 502 is provided with the second groove 503, the cylindrical rod is fixed in the second groove 503, but the lower surface of the upper floating body 4 is not provided with a hole, the height of the cylindrical rod is greater than the depth of the second groove 503, and when the upper permanent magnet 6 and the lower permanent magnet 7 are attracted, the upper surface of the cylindrical rod abuts against the lower surface of the upper floating body 4, and because the height of the cylindrical rod is greater than the depth of the second groove 503, a certain distance is still left between the upper permanent magnet 6 and the lower permanent magnet 7.

As an alternative embodiment, the inner wall of the side ring plate 2 is fixed with a guide block 12, the side of the guide block 12 facing the upper floating body 4 is provided with a guide groove, the side of the upper floating body 4 is provided with a slide block, the slide block slides in the guide groove along the length direction of the guide block 12, the guide block 12 plays a role in limiting the moving direction of the upper floating body 4, so that the upper floating body 4 can only move up and down, and the upper floating body 4 and the guide block 12 can also play a role in stabilizing the upper floating body 4 to a certain extent due to friction force between the upper floating body 4 and the guide block 12 so as to share the pressure of an elastic piece.

As a specific embodiment, as shown in fig. 1, a flange 11 is welded on the upper surface of the upper cover plate 1, a flange 11 is also fixed at the arm claw of the mechanical arm 16, the polishing buffer structure is fixed on the mechanical arm 16 through two flanges 11, a clamping device 8 is mounted on the lower surface of the lower floating body 5, and a polishing tool 17 is mounted on the lower floating body 5 through the clamping device 8, so that corresponding clamping modes can be designed according to different tools.

A polishing device comprises a polishing buffer structure, a mechanical arm 16 and a polishing tool 17, wherein the polishing buffer structure is arranged on the mechanical arm 16, the polishing tool 17 is arranged on the lower surface of a lower floating body 5, a flange 11 on the polishing buffer structure is attached to the flange 11 on the mechanical arm 16, then two flanges 11 are fixed by bolts and nuts, then the polishing tool 17 is clamped into a clamping device 8 on the lower floating body 5, then a controller is started, the mechanical arm 16 is controlled to work by the controller, the mechanical arm 16 polishes a workpiece on a workbench 18 according to a set program, when polishing a high point, an upward reaction force is given to the polishing tool 17, meanwhile, a force is exerted on the lower floating body 5 and the upper floating body 4, the upper floating body 4 and the lower floating body 5 move upwards, an elastic piece at the top of a shell is compressed, and an elastic piece at the top of the lower supporting plate 3 is stretched, when the high point is not contacted with the polishing tool 17 any more, the upper floating body 4 and the lower floating body move downwards to restore to the original positions due to the downward pulling force of the elastic piece at the top of the lower supporting plate 3 and the downward acting force of the elastic piece at the top of the shell, meanwhile, the reaction force is not conducted to the mechanical arm 16 due to the damping action of the elastic piece, the effects of buffering up and down movement and position restoration are achieved, the damage to the mechanical arm 16 and the polishing tool 17 in the up and down direction is reduced, meanwhile, the polishing tool 17 is given an opposite acting force in the horizontal direction, the lower floating body 5 is caused to move along the direction of the opposite acting force, the upper permanent magnet 6 and the lower permanent magnet 7 are offset by a certain distance, a certain buffering action is provided for the polishing tool 17 due to the interaction magnetic force between the upper permanent magnet 6 and the lower permanent magnet 7, the upper permanent magnet 6 and the lower permanent magnet 7 can be automatically centered and restored to the original position quickly, so that the lower floating body 5 is automatically restored to the original position, and the functions of motion buffering and position restoration are realized.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. A polishing buffer structure, comprising: the device comprises a shell, a lower supporting plate (3), an upper floating body (4) and a lower floating body (5), wherein the lower end of the shell is in an opening shape, a cavity is formed in the shell, the lower supporting plate (3) is connected to the lower surface of the shell, and a supporting plate cavity communicated with the cavity is formed in the lower supporting plate (3);

the upper floating body (4) is arranged in the cavity, the upper floating body (4) is arranged between the top of the shell and the lower supporting plate (3) through a plurality of elastic connecting pieces, so that the upper floating body (4) can float up and down in the cavity, the lower floating body (5) is positioned in the cavity and is lapped on the lower supporting plate (3), and a part of the lower floating body (5) extends out of the supporting plate cavity;

the upper surface of the lower floating body (5) is provided with a lower permanent magnet (7), the lower surface of the upper floating body (4) is provided with an upper permanent magnet (6) which is attracted with the lower permanent magnet (7), the lower floating body (5) is provided with a blocking piece (9), and the upper surface of the blocking piece (9) is propped against the lower surface of the upper floating body (4), so that a gap is reserved between the upper permanent magnet (6) and the lower permanent magnet (7).

2. The polishing buffer structure according to claim 1, wherein the housing is in a bottle cap shape, the lower support plate (3) is a circular plate, and the inner diameter of the lower support plate (3) is smaller than the inner diameter of the housing.

3. A sanding buffer structure according to claim 1, characterized in that the elastic connection comprises an upper elastic member and a lower elastic member (10), the upper elastic member being mounted between the upper surface of the upper floating body (4) and the top of the housing, the lower elastic member (10) being mounted between the lower surface of the upper floating body (4) and the upper surface of the lower pallet (3).

4. The polishing buffer structure according to claim 2, wherein the lower floating body (5) comprises a lower disc body (501) and an upper disc body (502) connected to the upper surface of the lower disc body (501), the lower disc body (501) and the upper disc body (502) are both disc-shaped, the axes of the lower disc body (501) and the upper disc body (502) are in the same straight line, the diameter of the upper disc body (502) is larger than the diameter of the lower disc body (501), the diameter of the upper disc body (502) is larger than the inner diameter of the lower support plate (3), and the diameter of the lower disc body (501) is smaller than the inner diameter of the lower support plate (3).

5. The polishing buffer structure according to claim 4, wherein a second groove (503) is formed in the upper surface of the upper disc body (502), the lower surface of the blocking member (9) is fixed in the second groove (503), a first groove (404) is formed in the lower surface of the upper floating body (4), the upper surface of the blocking member (9) is in contact with the first groove (404), and the diameter of the blocking member (9) is smaller than that of the first groove (404).

6. A polishing buffer structure according to claim 1, wherein the housing comprises an upper cover plate (1) and a side ring plate (2), the side ring plate (2) is fixed on the lower surface of the upper cover plate (1), the upper cover plate (1) and the side ring plate (2) are fixed by a plurality of fourth bolts (19), and the side ring plate (2) and the lower support plate (3) are fixed by a first bolt (13).

7. The polishing buffer structure according to claim 6, wherein a guide block (12) is fixed on the inner wall of the side ring plate (2), a guide groove is formed in the inner side of the guide block (12), a sliding block is arranged on the side surface of the upper floating body (4), and the sliding block slides in the guide groove along the length direction of the guide block (12).

8. The polishing buffer structure according to claim 1, wherein a first mounting groove (401) is formed in the lower surface of the upper floating body (4), a second mounting groove is formed in the upper surface of the lower floating body (5), the upper permanent magnet (6) is fixed in the first mounting groove (401) through a second bolt (14), and the lower permanent magnet (7) is fixed in the second mounting groove through a third bolt (15).

9. A sanding buffer structure according to claim 1, characterized in that the upper surface of the housing is provided with a flange (11), and the lower surface of the lower floating body (5) is provided with mounting card means (8).

10. A polishing device, characterized by comprising the polishing buffer structure, a mechanical arm (16) and a polishing tool (17) according to any one of claims 1-9, wherein the polishing buffer structure is mounted on the mechanical arm (16), and the polishing tool (17) is mounted on the lower surface of the lower floating body (5).