Polishing wheel

By designing the connection on the polishing wheel to the wheel body and the polishing part in the axial direction, it provides a radial traction effect, solving the problem of inconvenient installation and disassembly of the polishing part, achieving lower replacement cost and higher convenience.

CN222589305UActive Publication Date: 2025-03-11HENAN YUZHAN PRECISION TECH CO LTD
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Patent Information

Application Number
CN202420489434.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-13
Publication Date
2025-03-11
Estimated Expiration
2034-03-13

AI Technical Summary

Technical Problem

The existing polishing wheels are inconvenient during installation and disassembly, and the water absorption and expansion of the polishing parts lead to increased difficulty in disassembly of steel nails, affecting the cost of reuse and replacement.

Method used

设计了一种包括轮体、多个抛光件和连接件的抛光轮。 连接件沿轴向插接于轮体和抛光件,提供径向牵引作用,确保抛光件紧密连接,方便安装和拆卸。

Benefits of technology

Through the design of the connector, the installation and removal resistance of the polishing parts is reduced, the installation and removal convenience of the polishing parts is improved, the service life of the connector is extended, and the replacement cost of the polishing wheel is reduced.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model provides a polishing wheel. The polishing wheel comprises a wheel body; the polishing pieces are arranged on the edge, in the radial direction, of the wheel body, and the polishing pieces are sequentially arranged around the axis of the wheel body; the connecting piece is arranged at at least one axial end of the wheel body, one part of the connecting piece is inserted into the wheel body in the axial direction, and the other part of the connecting piece is inserted into the polishing piece in the axial direction. The polishing part can be conveniently mounted and dismounted, and the replacement cost of the polishing wheel is reduced.
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Description

Technical Field

[0001] The present application relates to the technical field of polishing equipment, and in particular to a polishing wheel. Background Art

[0002] Polishing wheels can be used to grind or polish metal products, non-metal products or plastic products, and are common consumables for polishing machines. The polishing wheel includes a wheel body and a polishing piece that are connected to each other. The polishing piece is fastened to the wheel body by steel nails to ensure that the polishing piece does not loosen or fall off during use; when the polishing piece is worn and needs to be replaced, the steel nails are pulled out and the old polishing piece is removed for replacement. Since the steel nails are covered inside the polishing piece during installation, the installation and removal of the polishing piece are inconvenient. In addition, the polishing piece absorbs water and expands, which will further increase the difficulty of removing the steel nails or cause the steel nails to deform, affecting the reuse of the steel nails and increasing the replacement cost of the polishing wheel. Utility Model Content

[0003] The present application provides a polishing wheel to facilitate the installation and disassembly of the polishing piece and reduce the replacement cost of the polishing wheel.

[0004] The present application provides a polishing wheel, which comprises:

[0005] Wheel body;

[0006] A plurality of polishing members, wherein the polishing members are arranged on the radial edge of the wheel body, and the polishing members are arranged in sequence around the axis of the wheel body;

[0007] A connecting piece is arranged at at least one axial end of the wheel body, a part of the connecting piece is axially plugged into the wheel body, and another part of the connecting piece is axially plugged into the polishing piece.

[0008] Optionally, the connecting member includes:

[0009] A main body portion, the main body portion extending from within the contour of the wheel body to within the contour of the polishing member;

[0010] A fixing assembly connected to the main body and protruding from a side of the main body facing the wheel body, the fixing assembly comprising a first fixing column and a second fixing column;

[0011] The first fixing column is used to be inserted into the wheel body, and the second fixing column is used to be inserted into the polishing piece.

[0012] Optionally, the main body is provided with a fixing assembly.

[0013] Optionally, the main body is provided with at least two fixing components, and each of the fixing components is arranged in a fan shape or a ring shape.

[0014] Optionally, the connecting member includes a first fastening nail and a second fastening nail;

[0015] The first fastening nail is composed of the main body and a fixing component;

[0016] The second fastening nail is composed of the main body and a plurality of fixing components;

[0017] The first fastening nails and the second fastening nails are alternately arranged around the axis of the wheel body.

[0018] Optionally, the connecting member includes a fastening ring, the main body is configured as a closed annular structure, and the fixing assembly is disposed in one-to-one correspondence with the polishing member.

[0019] Optionally, adjacent polishing members are staggered with each other along the radial direction of the wheel body, and adjacent fixing components are staggered with each other along the radial direction of the wheel body.

[0020] Optionally, a plurality of receiving grooves are provided on the edge of the polishing wheel, and the receiving grooves are evenly distributed around the axis of the wheel body, and adjacent receiving grooves are separated from each other by spacers, and polishing pieces are respectively provided on the receiving grooves and the spacers.

[0021] Optionally, the polishing wheel further comprises a pressing piece, wherein the pressing piece is stopped at a side of the connecting piece facing away from the wheel body, and the pressing piece is detachably connected to the wheel body.

[0022] Optionally, a slot is provided on a side of the pressing member facing the wheel body, and a portion of the connecting member is embedded in the slot.

[0023] The technical solution provided by this application can achieve the following beneficial effects:

[0024] The polishing wheel provided by the present application includes a wheel body, a plurality of polishing pieces and a connecting piece. The wheel body provides a support base and an installation base for the polishing wheel as a whole; the polishing piece is arranged at the radial edge of the wheel body, and each polishing piece is arranged in sequence around the axis of the wheel body, and the polishing piece is used to contact the surface of the workpiece for polishing; the connecting piece is arranged at at least one end of the axial direction of the wheel body, a part of the connecting piece is plugged into the wheel body along the axial direction, and another part of the connecting piece is plugged into the polishing piece along the axial direction, and a radial traction force is provided between the polishing piece and the wheel body through the connecting piece, so that the polishing piece is tightly connected to the edge of the wheel body, and the polishing piece is prevented from loosening or falling off from the wheel body. Since the connecting piece is subjected to force along the radial direction of the wheel body during use, and the connecting piece is installed and disassembled along the axial direction of the wheel body, the resistance of the installation and disassembly of the connecting piece can be reduced, which makes the installation and disassembly of the polishing piece more convenient, and the connecting piece is not easily deformed or damaged during the installation and disassembly of the polishing piece, which can realize the reuse of the connecting piece and reduce the replacement cost of the polishing wheel.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a first polishing wheel provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the matching relationship between the wheel body and the polishing piece provided in the embodiment of the present application;

[0028] Figure 3 A schematic diagram of the first structure of the connector provided in the embodiment of the present application;

[0029] Figure 4 A second structural schematic diagram of a connector provided in an embodiment of the present application;

[0030] Figure 5 A third structural schematic diagram of a connector provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of a wheel body provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the matching structure of the pressing member and the connecting member provided in the embodiment of the present application;

[0033] Figure 8 A schematic diagram of the exploded structure of the second polishing wheel provided in the embodiment of the present application;

[0034] Fig. 9 A schematic diagram of the exploded structure of a third polishing wheel provided in an embodiment of the present application;

[0035] Fig.10 A schematic diagram of the exploded structure of the fourth polishing wheel provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 1-wheel body;

[0038] 10-accommodating tank;

[0039] 12-septum;

[0040] 14-first plug-in hole;

[0041] 2- Polishing parts;

[0042] 20- second plug-in hole;

[0043] 3-Connectors;

[0044] 30-main body;

[0045] 32-fixed component;

[0046] 320-first fixed column;

[0047] 322- second fixed column;

[0048] 3a-first fastening nail;

[0049] 3b- second fastening nail;

[0050] 3c-fastening ring;

[0051] 4-Compression piece;

[0052] 40-Card slot;

[0053] 5-bolt;

[0054] 6-Mounting seat;

[0055] 7- End plate.

[0056] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0060] like Figure 1-Figure 10 As shown, an embodiment of the present application provides a polishing wheel, which includes a wheel body 1, a plurality of polishing pieces 2 and a connecting piece 3. The wheel body 1 provides a support base and an installation base for the polishing wheel as a whole; the polishing pieces 2 (for example, grinding skin, etc.) are arranged at the radial edge of the wheel body 1, and each polishing piece 2 is arranged in sequence around the axis of the wheel body 1, and the polishing piece 2 is used to contact the surface of the workpiece for polishing; the connecting piece 3 is arranged at least at one end of the axial direction of the wheel body 1, a part of the connecting piece 3 is axially inserted into the wheel body 1, and another part of the connecting piece 3 is axially inserted into the polishing piece 2, and a radial traction force is provided between the polishing piece 2 and the wheel body 1 through the connecting piece 3, so that the polishing piece 2 is tightly connected to the edge of the wheel body 1, and the polishing piece 2 is prevented from loosening or falling off from the wheel body 1. Since the connecting member 3 is subjected to radial force along the wheel body 1 during use and the connecting member 3 is installed and disassembled along the axial direction of the wheel body 1, the resistance to installation and disassembly of the connecting member 3 can be reduced, and the installation and disassembly of the polishing member 2 can be more convenient. In addition, the connecting member 3 is not prone to deformation and other damage during the installation and disassembly of the polishing member 2, and the connecting member 3 can be reused, thereby reducing the replacement cost of the polishing wheel.

[0061] In addition, the connecting part 3 is directly installed along the axial direction of the wheel body 1 without the need for other cooperation such as covering with the polishing part 2. The installation method is more convenient and has a higher fault tolerance rate. It can not only improve the assembly efficiency of the polishing wheel, but also facilitate the automatic assembly of the polishing wheel, saving labor costs.

[0062] Specifically, the wheel body 1 is made of rubber or other materials, which has a low manufacturing cost and can reduce the overall mass of the polishing wheel. The polishing pieces 2 are closely arranged in sequence around the edge of the wheel body 1, and the ends of the polishing pieces 2 away from the axis of the wheel body 1 are aligned with each other, thereby forming a continuous and smooth polishing structure. The connecting piece 3 is made of metal materials such as copper, which has a wide range of material sources, a low manufacturing cost, and can ensure that the connecting piece 3 has a high structural strength.

[0063] refer to Figure 1-Figure 5The wheel body 1 is provided with a first plug-in hole 14, and the polishing member 2 is provided with a second plug-in hole 20. The number of the first plug-in hole 14 and the second plug-in hole 20 can be the same or different. Correspondingly, the connecting member 3 is provided with a first fixing column 320 and a second fixing column 322. The number of the first fixing column 320 and the second fixing column 322 can be the same or different. The first fixing column 320 is plugged into the first plug-in hole 14, and the second fixing column 322 is plugged into the second plug-in hole 20. The first fixing column 320 and the second fixing column 322 are arranged in a columnar structure with a smooth surface, and the first fixing column 320 and the second fixing column 322 are parallel to each other, thereby further reducing the installation and removal resistance of the connecting member 3, making it easier to install and remove the connecting member 3 and the wheel body 1 and the connecting member 3 and the polishing member 2. When a single polishing member 2 is worn to the scrap level during long-term use, the corresponding single polishing member 2 can be disassembled and replaced without replacing the entire polishing wheel, thereby reducing the maintenance cost.

[0064] Furthermore, the connecting member 3 also includes a main body 30. The main body 30 extends from within the contour of the wheel body 1 to within the contour of the polishing member 2, so that the main body 30 can simultaneously press against one end of the wheel body 1 and the polishing member 2 along the axial direction, thereby limiting the relative position of the polishing member 2 and the wheel body 1 along the axial direction, improving the axial flatness of the polishing wheel, and preventing the polishing members 2 from being misaligned along the axial direction of the wheel body 1. The first fixing column 320 and the second fixing column 322 are connected to the main body 30 and protrude from the side of the main body 30 facing the wheel body 1. The first fixing column 320 is used to insert into the wheel body 1 to achieve the connection between the connecting member 3 and the wheel body 1, and the second fixing column 322 is used to insert into the polishing member 2 to achieve the connection between the connecting member 3 and the polishing member 2.

[0065] Furthermore, the connecting member 3 includes a main body 30 and a fixing assembly 32, and the fixing assembly 32 includes a first fixing column 320 and a second fixing column 322. That is, the first fixing column 320 and the second fixing column 322 correspond to each other to form the fixing assembly 32, and the fixing assembly 32 provides traction for each polishing member 2, which can not only improve the reliability of the connection of the polishing member 2, but also make the force distribution of the wheel body 1 and the connecting member 3 more uniform, avoid stress concentration causing damage to the wheel body 1 or the connecting member 3, and extend the service life of the polishing wheel.

[0066] In some embodiments, reference Figure 1 and Figure 3The connecting member 3 includes a first fastening nail 3a, which is composed of a main body 30 and a fixing assembly 32. That is, the main body 30 is only provided with one fixing assembly 32, so that each connecting member 3 can realize the connection and fixation of one polishing member 2 and the wheel body 1. It can not only reduce the processing accuracy requirements of the connecting member 3, avoid the processing error or assembly error of the connecting member 3, which leads to the problems of difficulty in installation or stress concentration of the connecting member 3, but also facilitate the partial replacement of the polishing wheel. That is, only the connecting member 3 corresponding to the damaged polishing member 2 needs to be removed, and the other connecting members 3 remain in the connected state, thereby simplifying the replacement operation of the polishing wheel.

[0067] In other embodiments, reference Figure 1 and Figure 4 The connecting member 3 includes a second fastening nail 3b, which is composed of a main body 30 and at least two fixing components 32. That is, the main body 30 is provided with at least two fixing components 32, and each fixing component 32 is arranged in a fan shape, so that one connecting member 3 can realize the corresponding connection and fixation of at least two polishing members 2 and the wheel body 1. It can control the processing accuracy requirements of the connecting member 3 within an appropriate range, reduce the installation difficulty or stress concentration of the connecting member 3, and control the number of the connecting member 3 within an appropriate range, simplify the assembly process, and improve the assembly efficiency.

[0068] In one embodiment, reference Figure 1 The connecting member 3 includes a first fastening nail 3a and a second fastening nail 3b, and the first fastening nail 3a and the second fastening nail 3b are alternately arranged around the axis of the wheel body 1. On the one hand, the overall weight distribution of the polishing wheel can be made more uniform, thereby improving the structural stability of the polishing wheel during high-speed operation and preventing the polishing wheel from generating large noise or vibration during high-speed operation; on the other hand, each connecting member 3 can be evenly stressed to avoid stress concentration caused by uneven stress, thereby improving the bearing capacity of the connecting member 3 and extending the service life of the polishing wheel.

[0069] In some embodiments, reference Figure 5 The connecting member 3 includes a fastening ring 3c, which is composed of a main body 30 and a plurality of fixing components 32. That is to say, the main body 30 is arranged as a closed ring structure, and the main body 30 is provided with a plurality of fixing components 32, each fixing component 32 is arranged in a ring shape, and the fixing components 32 are arranged one by one with the polishing member 2, so that only one connecting member 3 is needed to realize the connection and fixation of all the polishing members 2, which can not only increase the connection strength, but also reduce the number of parts and simplify the assembly process.

[0070] Further, refer to Figure 6Adjacent polishing parts 2 are staggered along the radial direction of the wheel body 1. Specifically, adjacent polishing parts 2 have different lengths, and adjacent polishing parts 2 are staggered at one end close to the axis of the wheel body 1, so that the surface strength of two adjacent polishing parts 2 is slightly different, thereby improving the polishing quality of the workpiece surface; adjacent fixing components 32 are staggered along the radial direction of the wheel body 1, so that each fixing component 32 can be distributed in two different annular areas of the wheel body 1, increasing the force-bearing area of ​​the wheel body 1, thereby making the force distribution of the wheel body 1 more uniform, and avoiding damage such as breakage caused by excessive local force on the wheel body 1.

[0071] Furthermore, a plurality of receiving grooves 10 are provided on the edge of the polishing wheel, and each receiving groove 10 is evenly distributed around the axis of the wheel body 1, and adjacent receiving grooves 10 are separated from each other by a spacer 12, and polishing pieces 2 are provided in the receiving grooves 10 and the spacer 12, respectively. On the one hand, by respectively providing polishing pieces 2 in the receiving grooves 10 and the spacer 12, adjacent polishing pieces 2 can be staggered with each other along the radial direction of the wheel body 1; on the other hand, by providing the receiving grooves 10, circumferential positioning and support are formed for the polishing pieces 2, so that the second plug-in hole 20 of the polishing piece 2 can match the position of the first plug-in hole 14 of the wheel body 1, thereby making the installation of the connector 3 smoother.

[0072] Further, refer to Figure 7-Figure 9 The polishing wheel also includes a clamping piece 4, which stops at the side of the connecting piece 3 away from the wheel body 1, and the clamping piece 4 is detachably connected to the wheel body 1. For example, the clamping piece 4 is connected to the wheel body 1 by means of bolts 5 or the like. On the one hand, by providing the clamping piece 4 to form an axial limit on the connecting piece 3, the connecting piece 3 can be prevented from loosening or falling off during the high-speed operation of the polishing wheel, thereby improving the safety of the use of the polishing wheel; on the other hand, since the clamping piece 4 forms an axial limit on the connecting piece 3, the axial force between the connecting piece 3 itself and the wheel body 1, as well as the axial force between the connecting piece 3 itself and the polishing piece 2 can be further reduced. For example, the interference fit can be changed to a transition fit or a clearance fit, thereby making the installation and removal of the connecting piece 3 more labor-saving. It can be understood that in other embodiments, the connecting piece 3 can also be directly and detachably connected to the wheel body 1 by means of bolts 5 or the like. For example, Fig.10 The fastening ring 3c is connected to the wheel body 1.

[0073] Furthermore, a clamping member 4 is provided with a slot 40 on the side facing the wheel body 1, and a portion of the connecting member 3 is embedded in the slot 40, thereby forming a radial limit for the connecting member 3, increasing the stability of the connecting member 3, and preventing the connecting member 3 from shaking or moving radially during use, thereby affecting the stability of the polishing wheel during high-speed operation.

[0074] Furthermore, the clamping groove 40 can be set as an annular groove with uniform width, which can not only simplify the manufacturing process of the clamping member 4, but also reduce the installation orientation requirements of the clamping member 4, thereby improving the assembly efficiency of the clamping member 4. The connecting member 3 is stopped at one side groove wall or both side groove walls of the clamping groove 40, so that radial limit can be formed at least on one side of the connecting member 3. Specifically, when the radial dimension of the connecting member 3 is smaller than the groove width of the annular groove, the connecting member 3 is stopped at one side groove wall of the clamping groove 40; when the radial dimension of the connecting member 3 is the same as the groove width of the annular groove, the connecting member 3 is stopped at both side groove walls of the clamping groove 40.

[0075] In some embodiments, the slot 40 can be configured as an annular slot with varying width, so that the slot width of the annular slot matches the size of the connector 3 at the corresponding position, ensuring that both ends of each connector 3 can be stopped by the groove walls on both sides of the slot 40. In other embodiments, the slot 40 can include a plurality of grooves distributed at intervals, and the contour shape of each groove matches the contour shape of the connector 3 at the corresponding position, so that the slot 40 forms a circumferential limit around each connector 3, further increasing the stability of the connector 3.

[0076] In some embodiments, reference Figure 8 , the connecting member 3 is arranged at both ends of the wheel body 1 in the axial direction, that is, the connecting members 3 are respectively arranged at both ends of the wheel body 1 in the axial direction, so that radial traction force can be provided between the polishing member 2 and the wheel body 1 at both ends of the wheel body 1, further increasing the reliability and stability of the connection of the polishing member 2, and preventing the polishing member 2 from tilting or loosening. The structures or arrangement of the connecting members 3 at both ends of the wheel body 1 can be the same or different.

[0077] In other embodiments, reference Fig. 9 and Fig.10 , the connecting member 3 is arranged at one axial end of the wheel body 1, that is, the connecting member 3 is arranged at one axial end of the wheel body 1, and the connecting member 3 is not arranged at the other end. The end of the wheel body 1 without the connecting member 3 can form an exposed surface, and the wheel body 1 and the polishing member 2 directly abut against the surface of the mounting seat 6 (refer to Fig. 9 The end of the wheel body 1 without the connecting member 3 may also be provided with an end plate 7, which may be detachably connected to the wheel body 1 by means of bolts 5 or the like, and the surfaces of the wheel body 1 and the polishing member 2 and the end plate 7 abut against each other to further improve the flatness of the polishing wheel along the axial direction and prevent the polishing members 2 from being misaligned along the axial direction of the wheel body 1 (refer to Fig.10 ).

[0078] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A polishing wheel, characterized in that: include: Wheel body; A plurality of polishing members, wherein the polishing members are arranged on the radial edge of the wheel body, and the polishing members are arranged in sequence around the axis of the wheel body; A connecting piece, wherein the connecting piece is arranged at at least one axial end of the wheel body, at least part of the connecting piece is axially plugged into the wheel body, and at least part of the connecting piece is axially plugged into the polishing piece.

2. The polishing wheel according to claim 1, characterized in that: The connecting piece comprises: A main body portion, the main body portion extending from within the contour of the wheel body to within the contour of the polishing member; A fixing assembly connected to the main body and protruding from a side of the main body facing the wheel body, the fixing assembly comprising a first fixing column and a second fixing column; The first fixing column is used to be inserted into the wheel body, and the second fixing column is used to be inserted into the polishing piece.

3. The polishing wheel according to claim 2, characterized in that: The main body is provided with a fixing assembly.

4. The polishing wheel according to claim 2, characterized in that: The main body is provided with at least two fixing components, and each of the fixing components is arranged in a fan shape or a ring shape.

5. The polishing wheel according to claim 2, characterized in that: The connecting member further comprises a first fastening nail and a second fastening nail; The first fastening nail is composed of the main body and a fixing component; The second fastening nail is composed of the main body and a plurality of fixing components; The first fastening nails and the second fastening nails are alternately arranged around the axis of the wheel body.

6. The polishing wheel according to claim 2, characterized in that: The connecting member also includes a fastening ring, the main body is configured as a closed annular structure, and the fixing assembly is configured in a one-to-one correspondence with the polishing member.

7. The polishing wheel according to claim 2, characterized in that: Adjacent polishing members are staggered with each other along the radial direction of the wheel body, and adjacent fixing components are staggered with each other along the radial direction of the wheel body.

8. The polishing wheel according to claim 7, characterized in that: The edge of the polishing wheel is provided with a plurality of receiving grooves, each of which is evenly distributed around the axis of the wheel body, and adjacent receiving grooves are separated from each other by a spacing portion, and the receiving grooves and the spacing portion are respectively provided with the polishing piece.

9. The polishing wheel according to any one of claims 1 to 8, characterized in that: The polishing wheel also includes a pressing piece, which is stopped at a side of the connecting piece away from the wheel body, and the pressing piece is detachably connected to the wheel body.

10. The polishing wheel according to claim 9, characterized in that: A clamping groove is provided on one side of the pressing member facing the wheel body, and a part of the connecting member is embedded in the clamping groove.