Polishing device

Abstract

The utility model provides a polishing device. The polishing device comprises a connecting shaft; the pitching assembly comprises a first mounting seat which is in driving connection with the end part of the connecting shaft and a second mounting seat which is pivotally arranged on the first mounting seat along a preset direction n, and the preset direction n is a direction perpendicular to the connecting shaft; the motor is arranged on the second mounting seat; the motor is in driving connection with the grinding disc; and the fan assembly comprises a dust suction hood arranged outside the grinding disc in a covering mode and a fan for sucking dust in the dust suction hood, and the grinding disc and the dust suction hood are arranged on the second mounting base so that the grinding disc and the dust suction hood can do pitching motion along with the second mounting base. According to the technical scheme, the problem that in the prior art, a grinding device is poor in grinding smoothness can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of construction equipment, in particular to a grinding device. Background Art

[0002] Putty wall polishing has always been a heavy physical labor in building decoration projects. It not only requires high physical strength from putty workers, but also generates a lot of dust during the polishing process, which is harmful to the health of putty workers. It is a job with health risks. Manual wall polishing will affect efficiency and quality due to different proficiency levels and physical exertion.

[0003] Some existing devices for polishing putty walls are prone to rigid collision with the wall when they move to a raised position on the wall during translational operation along the wall, which affects the smoothness of the polishing device and results in poor polishing effect. Utility Model Content

[0004] The main purpose of the utility model is to provide a grinding device to solve the problem of poor grinding smoothness of the grinding device in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a grinding device, comprising: a connecting shaft; a pitch assembly, comprising a first mounting seat drivingly connected to the end of the connecting shaft and a second mounting seat pivotally arranged on the first mounting seat along a preset direction n, the preset direction n being a direction perpendicular to the connecting shaft; a motor, arranged on the second mounting seat; a grinding disc, the motor being drivingly connected to the grinding disc; a fan assembly, comprising a dust hood arranged outside the grinding disc and a fan for sucking dust in the dust hood, the grinding disc and the dust hood being arranged on the second mounting seat so that the two can perform pitch movement following the second mounting seat.

[0006] In one embodiment, a pitch limiting structure is provided on the second mounting seat to limit the pitch angle of the second mounting seat relative to the first mounting seat.

[0007] In one embodiment, the second mounting seat includes a mounting plate located on the side of the first mounting seat away from the connecting shaft, and a limiting protrusion is arranged on the end face of the mounting plate close to the first mounting seat, and a gap is provided between the limiting protrusion and the first mounting seat. When the second mounting seat is rotated to a predetermined angle, the limiting protrusion abuts against the second mounting seat, and the limiting protrusion forms a pitch limiting structure. The grinding plate and the dust hood are arranged on the side of the mounting plate away from the first mounting seat.

[0008] In one embodiment, the dust hood can be floatably disposed on the mounting plate, and a first elastic member is disposed between the dust hood and the mounting plate.

[0009] In one embodiment, the fan is arranged on the second mounting seat, and the dust hood is provided with a avoidance opening for avoiding the dust suction port of the fan.

[0010] In one embodiment, the second mounting seat includes a seat body and a rotating shaft arranged on the seat body and extending along a preset direction n. A matching hole is arranged on the first mounting seat, and the rotating shaft can be pivotally arranged in the matching hole so that the second mounting seat can be pivotally arranged on the first mounting seat.

[0011] In one embodiment, the seat body includes a mounting plate located on the side of the first mounting seat away from the connecting shaft, a first mounting member and a second mounting member arranged on the surface of the mounting plate close to the connecting shaft, the rotating shaft is located between the first mounting member and the second mounting member, the motor is arranged on the second mounting member, and the rotating shaft, the first mounting member and the second mounting member are provided with through holes for avoiding the motor shaft of the motor, and the first mounting member and the mounting plate are provided with a transmission structure, and the motor shaft drives the grinding plate to rotate through the transmission structure.

[0012] In one embodiment, the fan is disposed on the first mounting member, and the motor shaft of the motor drives the impeller in the fan to rotate.

[0013] In one embodiment, the first mounting seat includes two plates butted against each other, grooves are arranged on opposite surfaces of the two plates, and the grooves of the two plates face each other to form a matching hole.

[0014] In one embodiment, the grinding device further includes: an elastic component, which is retractable along the direction of the connecting shaft, and the elastic component is arranged between the end of the connecting shaft and the first mounting seat.

[0015] In one embodiment, the elastic component includes a fixed plate and a movable plate arranged relatively along the axial direction of the connecting shaft and a second elastic member arranged between the fixed plate and the movable plate, the fixed plate is connected to the end of the connecting shaft, and the first mounting seat is connected to the movable plate.

[0016] In one embodiment, the polishing device further includes: a distance measuring sensor, which is arranged on the fixing plate and is used to detect the distance between the distance measuring sensor and the wall surface to be polished.

[0017] In one embodiment, a plurality of distance measuring sensors are arranged at intervals on a fixed plate, and the polishing device further comprises: a data detection module, arranged on the fixed plate, for collecting distance information detected by the plurality of distance measuring sensors and capable of transmitting the distance information to the outside.

[0018] By applying the technical solution of the utility model, the grinding device can be connected to the mechanical arm through the connecting shaft. When grinding is required, the motor is turned on, and the motor drives the grinding disc to rotate to achieve grinding. The dust generated during the grinding process can be covered in the dust hood and sucked to a predetermined position by the fan, thereby reducing the degree of environmental pollution. When the grinding device moves to the raised position of the wall, since the grinding disc and the dust hood are arranged on the second pitchable mounting seat, the grinding disc and the dust hood can follow the protrusion to perform a certain pitch movement, that is, the pitch assembly provides the grinding disc with a certain degree of pitch freedom, which can reduce the degree of rigid collision between the grinding device and the wall, so that the grinding disc can continuously and smoothly adapt to the slight ups and downs of the wall during operation, which improves the smoothness of the grinding of the grinding device on the one hand, and improves the grinding effect and the dust suction effect on the other hand. In addition, the pitch assembly uses two mounting seats that pivot with each other, so that the second mounting seat has a certain pitch freedom relative to the first mounting seat. The pitch of the grinding disc and the dust hood can be achieved without using other power sources, thereby simplifying the structure of the grinding device and reducing production costs.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of a three-dimensional structure at one angle of an embodiment of a grinding device according to the utility model is shown;

[0022] Figure 2 Shows Figure 1 A top view of a grinding device;

[0023] Figure 3 Shows Figure 2 A cross-sectional view of the grinding device along the AA axis;

[0024] Figure 4 Shows Figure 2 A cross-sectional view of the grinding device along the BB axis;

[0025] Figure 5 Shows Figure 1 A schematic diagram of the three-dimensional structure of the grinding device from another angle;

[0026] Figure 6 Shows Figure 1 A schematic diagram of the three-dimensional structure of the pitch assembly of the grinding device;

[0027] Figure 7 Shows Figure 6 A front view of a grinding device;

[0028] Figure 8 Shows Figure 7 A cross-sectional view of the grinding device taken along the CC direction; and

[0029] Fig. 9 Shows Figure 1 A schematic diagram of the three-dimensional structure of the second mounting seat of the grinding device.

[0030] The above drawings include the following reference numerals:

[0031] 10. Connecting shaft; 20. Pitch assembly; 21. First mounting seat; 211. Matching hole; 212. Plate body; 22. Second mounting seat; 221. Mounting plate; 222. Limiting protrusion; 223. Rotating shaft; 224. First mounting member; 225. Second mounting member; 226. Through hole; 227. Seat body; 30. Grinding disc; 40. Fan assembly; 41. Dust hood; 411. Avoidance; 42. Fan; 50. First elastic member; 60. Elastic assembly; 61. Fixed plate; 62. Movable plate; 63. Second elastic member; 70. Distance measuring sensor; 80. Data detection module; 90. Motor; 91. Motor shaft. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] like Figures 1 to 9 As shown, the grinding device of this embodiment includes: a connecting shaft 10, a pitch assembly 20, a motor 90, a grinding disc 30 and a fan assembly 40. Among them, the pitch assembly 20 includes a first mounting seat 21 drivingly connected to the end of the connecting shaft 10 and a second mounting seat 22 pivotally arranged on the first mounting seat 21 along a preset direction n, and the preset direction n is a direction perpendicular to the connecting shaft 10. The motor 90 is arranged on the second mounting seat 22. The motor 90 is drivingly connected to the grinding disc 30. The fan assembly 40 includes a dust hood 41 covered outside the grinding disc 30 and a fan 42 for sucking dust in the dust hood 41. The grinding disc 30 and the dust hood 41 are arranged on the second mounting seat 22 so that they can follow the second mounting seat 22 to perform pitch motion.

[0037] By applying the technical solution of this embodiment, the grinding device can be connected to the mechanical arm through the connecting shaft 10. When grinding is required, the motor 90 is turned on, and the motor 90 drives the grinding disc 30 to rotate to achieve grinding. The dust generated during the grinding process can be covered in the dust cover 41 and sucked to a predetermined position by the fan 42, thereby reducing the degree of environmental pollution. When the grinding device moves to the raised position of the wall, since the grinding disc 30 and the dust cover 41 are arranged on the second mounting seat 22 that can be pitched, the grinding disc 30 and the dust cover 41 can follow the protrusion to perform a certain pitch movement, that is, the pitch assembly 20 provides the grinding disc 30 with a certain degree of pitch freedom, which can reduce the degree of rigid collision between the grinding device and the wall, so that the grinding disc 30 can continuously and smoothly adapt to the slight undulation of the wall during operation, on the one hand, improving the smoothness of the grinding of the grinding device, and on the other hand, improving the grinding effect and the dust collection effect. In addition, the pitch assembly 20 uses two mounting seats that pivot with each other, so that the second mounting seat 22 has a certain pitch freedom relative to the first mounting seat 21. The pitch of the grinding disc 30 and the dust hood 41 can be achieved without using other power sources, thereby simplifying the structure of the grinding device and reducing production costs.

[0038] like Figures 1 to 9 As shown, in this embodiment, a pitch limiting structure is provided on the second mounting seat 22 to limit the pitch angle of the second mounting seat 22 relative to the first mounting seat 21. The above structure can reduce the swing amplitude of structures such as the motor 90, the dust cover 41 and the grinding disc 30, reduce the probability of collision between the above structures and external structures, and ensure the service life of the grinding device.

[0039] like Figure 1 and Fig. 9 As shown, in this embodiment, the second mounting seat 22 includes a mounting plate 221 located on the side of the first mounting seat 21 away from the connecting shaft 10, and a limiting protrusion 222 is provided on the end surface of the mounting plate 221 close to the first mounting seat 21, and there is a gap between the limiting protrusion 222 and the first mounting seat 21. When the second mounting seat 22 rotates to a predetermined angle, the limiting protrusion 222 abuts against the second mounting seat 22, and the limiting protrusion 222 forms a pitch limiting structure, and the grinding disc 30 and the dust cover 41 are arranged on the side of the mounting plate 221 away from the first mounting seat 21. The above structure is simple and easy to implement.

[0040] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the dust hood 41 can be floatingly arranged on the mounting plate 221, and a first elastic member 50 is arranged between the dust hood 41 and the mounting plate 221. The above structure ensures that the dust hood 41 is in continuous and stable contact with the wall surface, thereby ensuring the dust collection effect.

[0041] like Figure 1As shown, in this embodiment, the fan 42 is arranged on the second mounting seat 22, and the dust hood 41 is provided with a avoidance port 411 for avoiding the dust suction port of the fan 42. In the above structure, the fan 42 is arranged on the second mounting seat 22, so that the fan 42 and the dust hood 41 have the same pitch swing, making it easier for the fan 42 and the dust hood 41 to cooperate and seal. Of course, in other embodiments not shown in the figure, the fan may not swing, and a flow tube may be provided between the dust suction port of the fan and the avoidance port on the dust hood.

[0042] like Figure 1 , Figure 3 , Figure 8 and Fig. 9 As shown, in this embodiment, the second mounting seat 22 includes a seat body 227 and a rotating shaft 223 disposed on the seat body 227 and extending along a preset direction n, and a matching hole 211 is disposed on the first mounting seat 21, and the rotating shaft 223 is pivotally disposed in the matching hole 211 so that the second mounting seat 22 can be pivotally disposed on the first mounting seat 21. The above structure is simple and easy to implement.

[0043] like Figures 1 to 3 , Figures 6 to 9 As shown, in this embodiment, the seat body 227 includes a mounting plate 221 located on the side of the first mounting seat 21 away from the connecting shaft 10, a first mounting member 224 and a second mounting member 225 arranged on the surface of the mounting plate 221 close to the connecting shaft 10, the rotating shaft 223 is located between the first mounting member 224 and the second mounting member 225, the motor 90 is arranged on the second mounting member 225, the rotating shaft 223, the first mounting member 224 and the second mounting member 225 are provided with a through hole 226 for avoiding the motor shaft 91 of the motor 90, the first mounting member 224 and the mounting plate 221 are provided with a transmission structure, and the motor shaft 91 drives the grinding disc 30 to rotate through the transmission structure. The above structure can optimize the setting position of the motor 90, so that the axial length of the entire grinding device is smaller, and the grinding device is miniaturized.

[0044] like Figure 3 As shown, in this embodiment, the fan 42 is arranged on the first mounting member 224, and the motor shaft 91 of the motor 90 drives the impeller in the fan 42 to rotate. The above structure enables the motor 90 to serve as both the power source of the grinding disc 30 and the power source of the fan 42, thereby reducing the number of power sources of the grinding device, thereby reducing the production cost of the grinding device.

[0045] like Figure 1 and Figure 6As shown, in this embodiment, the first mounting seat 21 includes two plates 212 that are butted against each other, and grooves are provided on the opposing surfaces of the two plates 212, and the grooves of the two plates 212 are opposite to each other to form a matching hole 211. The above structure is simple and easy to assemble and produce.

[0046] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the grinding device further includes: an elastic component 60, which is retractable along the direction of the connecting shaft 10, and the elastic component 60 is arranged between the end of the connecting shaft 10 and the first mounting seat 21. The elastic component 60 can ensure that the grinding disc 30 is in continuous and stable contact with the wall.

[0047] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the elastic component 60 includes a fixed plate 61 and a movable plate 62 arranged relatively along the axial direction of the connecting shaft 10, and a second elastic member 63 arranged between the fixed plate 61 and the movable plate 62, the fixed plate 61 is connected to the end of the connecting shaft 10, and the first mounting seat 21 is connected to the movable plate 62. The above structure is simple and easy to implement. Preferably, in this embodiment, a guide column is also arranged between the fixed plate 61 and the movable plate 62 to ensure that the movable plate 62 moves along a preset direction.

[0048] like Figure 1 , Figures 3 to 5 As shown, in this embodiment, the grinding device further includes: a distance sensor 70, which is arranged on the fixing plate 61 to detect the distance between it and the wall to be grinded. Specifically, the pressure applied by the robot arm to the wall is controlled according to the distance information obtained by the distance sensor 70, so that the pressure between the grinding disc 30 and the wall can be stable, and pressure adaptation can be achieved within a small range.

[0049] like Figure 1 , Figures 3 to 5 As shown, in this embodiment, the distance measuring sensors 70 are multiple and are arranged at intervals on the fixed plate 61, and the grinding device further includes: a data detection module 80, which is arranged on the fixed plate 61, and is used to collect the distance information detected by the multiple distance measuring sensors 70, and can transmit the distance information to the outside. The above structure makes the distance information transmitted to the outside by the grinding device more accurate, so that the pressure applied by the robot arm to the wall surface is more accurate, and the pressure stability between the grinding disc 30 and the wall surface is further improved.

[0050] It should be noted that, in this embodiment, the dust hood 41 includes a hood body and an annular dust brush. The grinding disc 30 is located in the center of the dust brush.

[0051] The following is a detailed introduction to the working principle of the grinding device:

[0052] The grinding device is installed on the robotic arm. During operation, the robotic arm presses the grinding device to the starting point of the wall. The pitch provided by the pitch component and the elastic support provided by the second elastic member greatly reduce the rigid collision with the wall. The elastic component is pressed into place according to the distance data of the ranging sensor, so that a certain pressure is generated between the grinding disc and the wall. The grinding disc is started and the fan component (dust suction device) starts working at the same time. The robotic arm pushes the grinding disc to move on the wall according to the set trajectory. During the process, the downward pressure distance is adjusted according to the data feedback from the ranging sensor to ensure continuous and stable contact with the wall. Continuous and stable contact brings a stable dust suction effect. When the wall is partially convex, the relative position of the fixed part and the wall remains unchanged, the compression of the second spring increases, the grinding pressure increases, the material removal increases, and the convex part is polished flat. When the wall is flat, the grinding pressure is stable and the material removal is uniform. When the wall is slightly concave, the compression of the second spring decreases, the grinding pressure decreases, the material removal is small, and the concave part has a smooth transition.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A grinding device, characterized in that: include: Connecting shaft (10); A pitch assembly (20), comprising a first mounting seat (21) drivingly connected to an end of the connecting shaft (10) and a second mounting seat (22) pivotally arranged on the first mounting seat (21) along a preset direction n, wherein the preset direction n is a direction perpendicular to the connecting shaft (10); A motor (90) is disposed on the second mounting seat (22); A grinding disc (30), wherein the motor (90) is drivingly connected to the grinding disc (30); The fan assembly (40) comprises a dust hood (41) arranged outside the grinding disc (30) and a fan (42) for sucking dust in the dust hood (41); the grinding disc (30) and the dust hood (41) are arranged on the second mounting seat (22) so that the two can follow the second mounting seat (22) to perform pitch movement.

2. The grinding device according to claim 1, characterized in that: The second mounting seat (22) is provided with a pitch limiting structure to limit the pitch angle of the second mounting seat (22) relative to the first mounting seat (21).

3. The grinding device according to claim 2, characterized in that: The second mounting seat (22) comprises a mounting plate (221) located on a side of the first mounting seat (21) away from the connecting shaft (10); a limiting protrusion (222) is arranged on an end surface of the mounting plate (221) close to the first mounting seat (21); a gap is provided between the limiting protrusion (222) and the first mounting seat (21); when the second mounting seat (22) is rotated to a predetermined angle, the limiting protrusion (222) abuts against the second mounting seat (22); the limiting protrusion (222) forms the pitch limiting structure; the grinding plate (30) and the dust cover (41) are arranged on a side of the mounting plate (221) away from the first mounting seat (21).

4. The grinding device according to claim 3, characterized in that: The dust hood (41) can be floatingly arranged on the mounting plate (221), and a first elastic member (50) is arranged between the dust hood (41) and the mounting plate (221).

5. The grinding device according to claim 1, characterized in that: The fan (42) is arranged on the second mounting seat (22), and the dust cover (41) is provided with a avoidance opening (411) for avoiding the dust suction opening of the fan (42).

6. The grinding device according to claim 1, characterized in that: The second mounting seat (22) comprises a seat body (227) and a rotating shaft (223) arranged on the seat body (227) and extending along the preset direction n; a matching hole (211) is arranged on the first mounting seat (21); the rotating shaft (223) can be pivotally arranged in the matching hole (211) so that the second mounting seat (22) can be pivotally arranged on the first mounting seat (21).

7. The grinding device according to claim 6, characterized in that: The seat body (227) comprises a mounting plate (221) located on a side of the first mounting seat (21) away from the connecting shaft (10), a first mounting member (224) and a second mounting member (225) arranged on a surface of the mounting plate (221) close to the connecting shaft (10); the rotating shaft (223) is located between the first mounting member (224) and the second mounting member (225); the motor (90) is arranged on the second mounting member (225); a through hole (226) for avoiding the motor shaft (91) of the motor (90) is arranged on the rotating shaft (223), the first mounting member (224) and the second mounting member (225); a transmission structure is arranged on the first mounting member (224) and the mounting plate (221); the motor shaft (91) drives the grinding plate (30) to rotate through the transmission structure.

8. The grinding device according to claim 7, characterized in that: The fan (42) is arranged on the first mounting member (224), and the motor shaft (91) of the motor (90) drives the impeller in the fan (42) to rotate.

9. The grinding device according to claim 7, characterized in that: The first mounting seat (21) comprises two plates (212) butted against each other, grooves being arranged on opposite surfaces of the two plates (212), and the grooves of the two plates (212) are opposite to each other to form the matching hole (211).

10. The grinding device according to claim 1, characterized in that: The grinding device also includes: An elastic component (60), the elastic component (60) is retractable along the direction of the connecting shaft (10), and the elastic component (60) is arranged between the end of the connecting shaft (10) and the first mounting seat (21).

11. The grinding device according to claim 10, characterized in that: The elastic component (60) comprises a fixed plate (61) and a movable plate (62) which are arranged relatively to each other along the axial direction of the connecting shaft (10), and a second elastic member (63) arranged between the fixed plate (61) and the movable plate (62); the fixed plate (61) is connected to the end of the connecting shaft (10), and the first mounting seat (21) is connected to the movable plate (62).

12. The grinding device according to claim 11, characterized in that: The grinding device also includes: The distance measuring sensor (70) is arranged on the fixing plate (61) and is used to detect the distance between the fixing plate (70) and the wall surface to be polished.

13. The grinding device according to claim 12, characterized in that: The distance measuring sensors (70) are multiple and are arranged at intervals on the fixing plate (61), and the polishing device further comprises: The data detection module (80) is arranged on the fixing plate (61) and is used to collect distance information detected by the plurality of distance measuring sensors (70) and is capable of transmitting the distance information to the outside.

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