Grinding wheel rotation stopping device

Abstract

The utility model discloses a grinding wheel rotation stopping device which is characterized in that a connecting piece comprises a connecting body, a first connecting part and a second connecting part, and the first connecting part and the second connecting part are respectively and vertically connected with the connecting body; the first connecting part is provided with a first through hole, the second connecting part is provided with a second through hole, and the first through hole and the second through hole penetrate through the connecting body in the first direction; the first screw comprises a first screw head, the first screw head abuts against the upper surface of the connecting body, and a part of the first screw penetrates through the first through hole to be connected with the threaded hole in the protective cover; the second screw comprises a second screw head, the second screw head abuts against the upper surface of the connecting body, and a part of the second screw penetrates through the second through hole to be connected with the threaded hole in the grinding wheel. According to the utility model, the grinding wheel can be prevented from rotating when the fixing screw is rotated in the process of mounting, dismounting and repairing the grinding wheel, so that an operator can lock or loosen the fixing screw more quickly and more firmly.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding wheel disassembly and assembly of grinding machines, and particularly relates to a grinding wheel anti-rotation device. Background Technique

[0002] A grinding machine is a machine tool for grinding the surface of workpieces. Most grinding machines mainly use a high-speed rotating grinding wheel to grind and polish workpieces. Since the grinding wheel is frequently used and the grinding process itself will cause wear and consumption, the demand for regular replacement of the grinding wheel is relatively high. When the wear reaches a certain degree, a new grinding wheel needs to be replaced. On the other hand, corresponding matching grinding wheels also need to be replaced for different types of workpieces.

[0003] During the installation, disassembly and repair of the grinding wheel, it is necessary to lock or loosen the grinding wheel fixing screws. However, when performing this work, since the grinding wheel is installed on the main shaft and will rotate with the main shaft, it will cause the problem that it is difficult to lock and loosen the grinding wheel fixing screws. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the grinding wheel rotates with the main shaft during the installation, disassembly and repair of the grinding wheel, resulting in difficulty in locking and loosening the grinding wheel fixing screws. The utility model provides a grinding wheel anti-rotation device. During the installation, disassembly and repair of the grinding wheel, when the operator rotates the fixing screw, the grinding wheel does not rotate, and the operator can lock or loosen the fixing screw faster and more firmly.

[0005] To solve the above technical problems, the utility model provides a grinding wheel anti-rotation device, including:

[0006] A connecting piece, including a connecting body, a first connecting part and a second connecting part. The first connecting part and the second connecting part are respectively vertically connected to the connecting body; the first connecting part and the second connecting part both extend along a first direction; the first connecting part is provided with a first through hole, and the second connecting part is provided with a second through hole. The first through hole and the second through hole both penetrate the connecting body along the first direction;

[0007] A first screw, including a first screw head, the first screw head abuts against the upper surface of the connecting body, and a part of the first screw passes through the first through hole to be connected to a threaded hole on the protective cover;

[0008] A second screw, including a second screw head, the second screw head abuts against the upper surface of the connecting body, and a part of the second screw passes through the second through hole to be connected to a threaded hole on the grinding wheel.

[0009] With the above technical solution, the first screw head abuts against the upper surface of the connection body, and a part of the first screw passes through the first through hole on the first connection part to be connected to the threaded hole on the protective cover, that is, the connecting part is fixedly connected to the protective cover. Similarly, the second screw head abuts against the upper surface of the connection body, and a part of the second screw passes through the second through hole to be connected to the threaded hole on the grinding wheel, that is, the connecting part is fixedly connected to the grinding wheel. That is to say, the connecting part, the first screw and the second screw fixedly connect the protective cover and the grinding wheel.

[0010] Since the protective cover is fixed and immovable, the grinding wheel is fixedly connected to the protective cover, and the grinding wheel will not move. Thus, during the installation, disassembly and repair of the grinding wheel, when the operator rotates the fixing screw, the grinding wheel does not rotate, and the operator can lock or loosen the fixing screw faster and more firmly.

[0011] According to another specific embodiment of the present invention, the radial dimension of the first screw head is larger than the inner diameter of the first through hole.

[0012] With the above technical solution, the radial dimension of the first screw head is larger than the inner diameter of the first through hole, so that the first screw head abuts against the upper surface of the connection body to prevent the first screw from detaching from the first through hole.

[0013] According to another specific embodiment of the present invention, the radial dimension of the second screw head is larger than the inner diameter of the second through hole.

[0014] With the above technical solution, the radial dimension of the second screw head is larger than the inner diameter of the second through hole, so that the second screw head abuts against the upper surface of the connection body to prevent the second screw from detaching from the second through hole.

[0015] According to another specific embodiment of the present invention, the length of the first connection part in the first direction is greater than the length of the second connection part in the first direction.

[0016] With the above technical solution, there is a spacing distance between the surface of the grinding wheel for connecting to the second connection part and the protective cover. Then, by setting the length of the first connection part to be greater than the length of the second connection part, the first connection part can extend along the first direction to the protective cover, thus facilitating the first screw to pass through the first through hole and be connected to the threaded hole on the protective cover.

[0017] According to another specific embodiment of the present invention, there are two second connection parts, and the two second connection parts are arranged at intervals along the length direction of the connection body, and the length direction of the connection body is perpendicular to the first direction.

[0018] With the above technical solution, the two second connecting parts are both connected to the grinding wheel through two second screws corresponding to them one by one, that is, there are two connections between the connecting piece and the grinding wheel, thereby improving the reliability of the connection between the connecting piece and the grinding wheel, and avoiding the separation of the grinding wheel from the connecting piece when the operator rotates the fixing screw during the installation, disassembly and repair of the grinding wheel, resulting in the rotation of the grinding wheel.

[0019] According to another specific embodiment of the present invention, the connecting body includes one or more avoidance holes, and the one or more avoidance holes are used to expose one or more fixing screws on the surface of the grinding wheel.

[0020] With the above technical solution, the avoidance holes facilitate the fixing screws on the grinding wheel to pass through the avoidance holes and be exposed, so as to facilitate the operator to lock or loosen the fixing screws, and further realize the installation, disassembly and repair of the grinding wheel.

[0021] According to another specific embodiment of the present invention, the first receiving threaded hole and the second receiving threaded hole are provided at intervals on the connecting body, the first receiving threaded hole is used to place the first screw, and the second receiving threaded hole is used to place the second screw.

[0022] With the above technical solution, after the installation, disassembly and repair of the grinding wheel are completed and the grinding wheel rotation stopping device needs to be removed, when the operator removes the first screw, the first screw can be directly screwed into the first receiving threaded hole, and when the second screw is removed, the second screw can be directly screwed into the second receiving threaded hole, thereby avoiding the situation that the first screw and the second screw have nowhere to be placed or are randomly placed after being removed, which brings inconvenience to the next use of the grinding wheel rotation stopping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view showing the connection of the grinding wheel rotation stopping device of the embodiment of the present invention to the grinding wheel and the protective cover;

[0024] Figure 2 A perspective view showing the connecting piece of the embodiment of the present invention;

[0025] Figure 3 A perspective view showing the grinding wheel rotation stopping device of the embodiment of the present invention;

[0026] Figure 4 A front view showing the connecting piece of the embodiment of the present invention;

[0027] Figure 5 A bottom view showing the connecting piece of the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this implementation manner. On the contrary, the purpose of introducing the utility model in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0029] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0031] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0032] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0033] To make the purpose, technical solutions and advantages of the present utility model clearer, the following will further describe the implementation manners of the present utility model in detail with reference to the drawings.

[0034] Reference Figures 1 to 3, an embodiment of the present application provides a grinding wheel anti-rotation device 1 for detachably fixing the grinding wheel 2 to the protective cover 3. Those skilled in the art can understand that the protective cover 3 is stationary. In this embodiment, the protective cover 3 is fixedly connected to the machine housing (not shown in the figure), thereby realizing the fixation of the protective cover 3, and the grinding wheel anti-rotation device 1 fixedly connects the grinding wheel 2 to the protective cover 3, thereby fixing the grinding wheel 2 to prevent the grinding wheel 2 from rotating with the main shaft (not shown in the figure) when the operator rotates the fixing screw during the installation and disassembly and repair of the grinding wheel 2.

[0035] Specifically, as Figure 3 and Figure 4 shown, the grinding wheel anti-rotation device 1 includes a connecting member 4, a first screw 5, and two second screws 6. Among them, the connecting member 4 includes a connecting body 40, a first connecting portion 41, and a second connecting portion 42. The first connecting portion 41 and the second connecting portion 42 are respectively vertically connected to the connecting body 40. Exemplarily, the connecting body 40 is in a plate shape, the first connecting portion 41 and the second connecting portion 42 are both in a column shape, and the first connecting portion 41 and the second connecting portion 42 are located below the connecting body 40 and are welded to it. Those skilled in the art can understand that in other embodiments, the first connecting portion 41, the second connecting portion 42, and the connecting body 40 can also be other connection methods, such as screw connection, integral molding, etc.

[0036] Both the first connecting portion 41 and the second connecting portion 42 extend along the first direction Z, and the first direction Z is perpendicular to the length direction X of the connecting body 40. The first connecting portion 41 is provided with a first through hole 410, and the second connecting portion 42 is provided with a second through hole 420. Both the first through hole 410 and the second through hole 420 penetrate the connecting body 40 along the first direction Z. Exemplarily, when the grinding wheel anti-rotation device 1 fixes the grinding wheel 2, the first direction Z is also the axial direction of the grinding wheel 2, and the first connecting portion 41 extends along the first direction Z and towards the protective cover 3 on the outer periphery of the grinding wheel 2.

[0037] Exemplarily, there are two second connecting portions 42, and the two second connecting portions 42 are arranged at intervals along the length direction X of the connecting body 40. Each second connecting portion 42 is provided with a second through hole 420 to correspond to the two second screws 6 one by one.

[0038] The above-mentioned first screw 5 includes a first screw head 50. The first screw head 50 abuts against the upper surface of the connection body 40. A part of the first screw 5 passes through the first through hole 410 to be connected to the threaded hole on the protective cover 3. Exemplarily, the first screw 5 includes a first screw rod portion (not shown in the figure) and a first screw head 50. The radial dimension of the first screw head 50 is greater than that of the first screw rod portion and greater than the inner diameter of the first through hole 410, while the inner diameter of the first through hole 410 is greater than the radial dimension of the first screw rod portion. Then the first screw rod portion can pass through the first through hole 410, enter the threaded hole on the protective cover 3, and be connected thereto, while the first screw head 50 abuts against the upper surface of the connection body 40 to prevent the first screw 5 from detaching from the first through hole 410.

[0039] Exemplarily, as Figure 1 and Figure 5 shown, Figure 5 Fig. shows a bottom view schematic diagram of the connecting member 4. It is easy to understand that a part of the surface of the protective cover 3 is blocked by the grinding wheel 2, so the position of the exposed area of the protective cover 3 where the first connecting portion 41 can be connected is limited. In this application, the cross-section of the first connecting portion 41 is set to be a rectangular shape with a pair of opposite sides being arcs, so that its shape and size correspond to the connecting position on the protective cover 3, thereby ensuring that the first connecting portion 41 can be in full contact with the protective cover 3, and avoiding the situation that due to the too large cross-sectional area of the first connecting portion 41, it cannot be in full contact with the protective cover 3, resulting in the first screw 5 being unable to be stably and reliably connected to the threaded hole on the protective cover 3.

[0040] The above-mentioned second screw 6 includes a second screw head 60. The second screw head 60 abuts against the upper surface of the connection body 40. A part of the second screw 6 passes through the second through hole 420 to be connected to the threaded hole on the grinding wheel 2. Exemplarily, the second screw 6 includes a second screw rod portion (not shown in the figure) and a second screw head 60. The radial dimension of the second screw head 60 is greater than that of the second screw rod portion and greater than the inner diameter of the second through hole 420, while the inner diameter of the second through hole 420 is greater than the radial dimension of the second screw rod portion. Then the second screw rod portion can pass through the second through hole 420, enter the threaded hole on the grinding wheel 2, and be connected thereto, while the second screw head 60 abuts against the upper surface of the connection body 40 to prevent the second screw 6 from detaching from the second through hole 420.

[0041] Exemplarily, the two second connecting portions 42 are both connected to the grinding wheel 2 through the two second screws 6 corresponding to them one by one, that is, there are two connections between the connecting member 4 and the grinding wheel 2, thereby improving the connection reliability between the connecting member 4 and the grinding wheel 2, and avoiding the situation that when the operator rotates the fixing screw during the installation and disassembly and repair of the grinding wheel 2, the grinding wheel 2 is separated from the connecting member 4, resulting in the rotation of the grinding wheel 2.

[0042] With the above technical solution, the first screw head 50 abuts against the upper surface of the connection body 40, and a part of the first screw 5 passes through the first through hole 410 on the first connection portion 41 to be connected to the threaded hole on the protective cover 3, that is, the connecting member 4 is fixedly connected to the protective cover 3. Similarly, the second screw head 60 abuts against the upper surface of the connection body 40, and a part of the second screw 6 passes through the second through hole 420 to be connected to the threaded hole on the grinding wheel 2, that is, the connecting member 4 is fixedly connected to the grinding wheel 2. That is to say, the connecting member 4, the first screw 5 and the second screw 6 fixedly connect the protective cover 3 and the grinding wheel 2.

[0043] Since the protective cover 3 is connected to the machine housing and the protective cover 3 is fixed, the grinding wheel 2 is fixedly connected to the protective cover 3 and thus the grinding wheel 2 will not move. Therefore, during the installation, disassembly and repair of the grinding wheel 2, when the operator rotates the fixing screw, the grinding wheel 2 does not rotate, and the operator can lock or loosen the fixing screw faster and more firmly.

[0044] In addition, in the present application, the first screw 5 passes through the first through hole 410 of the first connection portion 41 to be connected to the threaded hole on the protective cover 3, and the second screw 6 passes through the second through hole 420 of the second connection portion 42 to be connected to the threaded hole on the grinding wheel 2. The setting of the first through hole 410 facilitates the alignment of the first screw 5 and connection to the threaded hole on the protective cover 3, that is, the first screw 5 can rotate slightly within the first through hole 410 to facilitate alignment with the threaded hole on the protective cover 3. Similarly, the setting of the second through hole 420 facilitates the alignment of the second screw 6 and connection to the threaded hole on the grinding wheel 2, that is, the second screw 6 can rotate slightly within the second through hole 420 to facilitate alignment with the threaded hole on the grinding wheel 2.

[0045] Exemplarily, as Figure 4 shown, the thickness m of the connection body 40 is 10 mm, the inner diameter of the first through hole 410 is 13 mm, and the inner diameter of the second through hole 420 is 11 mm. However, those skilled in the art can understand that in other embodiments, the thickness m of the connection body 40, the inner diameter of the first through hole 410, and the inner diameter of the second through hole 420 can all be selected as other values, and the present application places no restrictions thereon.

[0046] In some possible implementation manners, as Figure 4 shown, the length of the first connection portion 41 in the first direction Z is greater than the length of the second connection portion 42 in the first direction Z. Exemplarily, the surface of the grinding wheel 2 for connection to the second connection portion 42 has a spacing distance from the protective cover 3. Then, by setting the length of the first connection portion 41 to be greater than the length of the second connection portion 42, the first connection portion 41 extends along the first direction Z to the protective cover 3, thereby facilitating the first screw 5 to pass through the first through hole 410 and be connected to the threaded hole on the protective cover 3.

[0047] Exemplarily, the length L1 of the first connecting portion 41 in the first direction Z is 46 mm, and the length L2 of the second connecting portion 42 in the first direction Z is 10 mm. However, those skilled in the art can understand that the length L1 of the first connecting portion 41 needs to be determined according to the spacing distance between the surface of the grinding wheel 2 for connecting with the second connecting portion 42 and the protective cover 3 and the length of the second connecting portion 42. That is, the length L2 of the second connecting portion 42 can be selected as other values, such as 11 mm, 12 mm, etc. Correspondingly, the length L1 of the first connecting portion 41 also changes, such as 47 mm, 48 mm, etc.

[0048] In some possible implementation manners, as Figure 3 shown, the connecting body 40 includes one or more avoiding holes 7, and the one or more avoiding holes 7 are used to expose one or more fixing screws on the surface of the grinding wheel 2. Exemplarily, the connecting body 40 includes 2 avoiding holes 7, and the inner diameters of the 2 avoiding holes 7 are larger than the radial dimension of the fixing screw, so as to facilitate the fixing screw on the grinding wheel 2 to be exposed through the avoiding holes 7, which is beneficial for the operator to lock or loosen the fixing screw, and further realize the installation and disassembly and repair of the grinding wheel 2.

[0049] Those skilled in the art can understand that the number of the avoiding holes 7 needs to be determined according to the number of the fixing screws that may be blocked by the connecting body 40 actually. For example, if there are 3 fixing screws on the grinding wheel 2 that may be blocked by the connecting body 40, then 3 avoiding holes 7 need to be provided at the corresponding positions of the connecting body 40 to ensure that all 3 fixing screws can be exposed outside, so as to facilitate the operator to lock or loosen the fixing screw, and further realize the installation and disassembly and repair of the grinding wheel 2.

[0050] Exemplarily, the inner diameter of the avoiding hole 7 is 18 mm. However, those skilled in the art can understand that in other embodiments, the inner diameter of the avoiding hole 7 can be selected as other values, such as 17 mm, 19 mm, 20 mm, etc.

[0051] In some possible implementation manners, as Figure 2 and Figure 3 shown, the connecting body 40 is provided with a first receiving threaded hole 8 and a second receiving threaded hole 9. The first receiving threaded hole 8 is used to place the first screw 5, and the second receiving threaded hole 9 is used to place the second screw 6. Exemplarily, the first receiving threaded hole 8 and the second receiving threaded hole 9 penetrate through the connecting body 40. After the installation and disassembly and repair of the grinding wheel 2 are completed and the grinding wheel rotation stopping device 1 needs to be removed, when the operator removes the first screw 5, the first screw 5 can be directly screwed into the first receiving threaded hole 8. When removing the second screw 6, the second screw 6 can be directly screwed into the second receiving threaded hole 9, so as to avoid the situation that the first screw 5 and the second screw 6 have nowhere to be placed after being removed, or being randomly placed, which brings inconvenience to the next use of the grinding wheel rotation stopping device 1.

[0052] Exemplarily, two second receiving threaded holes 9 are provided in this embodiment to receive two second screws 6 respectively. Those skilled in the art can understand that in other embodiments, other numbers of first receiving threaded holes 8 and second receiving threaded holes 9 can also be set to correspond to the numbers of the first screw 5 and the second screw 6 respectively.

[0053] Exemplarily, the diameter of the first receiving threaded hole 8 is 12 mm, and the diameter of the second receiving threaded hole 9 is 10 mm. However, those skilled in the art can understand that in other embodiments, the diameters of the first receiving threaded hole 8 and the second receiving threaded hole 9 can be selected as other values as long as they correspond to the sizes of the corresponding first screw 5 and second screw 6.

[0054] Exemplarily, referring to Figures 1 to 5 , the process of installing the grinding wheel 2 by using the grinding wheel anti-rotation device 1 of the present application is as follows: First, pre-install the grinding wheel 2 onto the mounting flange of the main shaft through a tool or other tooling, then place the connecting member 4 on the grinding wheel 2, and align the first through hole 410 of the first connecting portion 41 with the threaded hole on the protective cover 3, and align the second through hole 420 of the second connecting portion 42 with the threaded hole on the grinding wheel 2. Then, screw the first screw 5 into the first through hole 410 in sequence to connect it with the threaded hole on the protective cover 3, and screw the second screw 6 into the second through hole 420 to connect it with the threaded hole on the grinding wheel 2, thereby detachably fixing and connecting the grinding wheel 2 and the protective cover 3 and ensuring the fixation of the grinding wheel 2. Then, the fixing screw can be screwed into the grinding wheel 2 to realize the connection between the grinding wheel 2 and the mounting flange of the main shaft. After the grinding wheel 2 is locked, the first screw 5 and the second screw 6 are removed in sequence and placed into the corresponding first receiving threaded hole 8 and second receiving threaded hole 9, thereby removing the connecting member 4 from the grinding wheel 2 and the protective cover 3, and thus realizing the installation of the grinding wheel 2.

[0055] Correspondingly, the process of disassembling the grinding wheel 2 by using the grinding wheel anti-rotation device 1 of the present application is as follows: Place the connecting member 4 on the grinding wheel 2, and align the first through hole 410 of the first connecting portion 41 with the threaded hole on the protective cover 3, and align the second through hole 420 of the second connecting portion 42 with the threaded hole on the grinding wheel 2. Then, screw the first screw 5 into the first through hole 410 in sequence to connect it with the threaded hole on the protective cover 3, and screw the second screw 6 into the second through hole 420 to connect it with the threaded hole on the grinding wheel 2, thereby detachably fixing and connecting the grinding wheel 2 and the protective cover 3 and ensuring the fixation of the grinding wheel 2. Then, loosen and remove all the fixing screws through a tool (such as an internal hexagon wrench, etc.), and finally remove the grinding wheel 2 by using other tooling or tools, and thus realize the disassembly of the grinding wheel 2.

[0056] Although the present utility model has been illustrated and described by referring to some preferred embodiments thereof, those of ordinary skill in the art should understand that the above content is a further detailed description of the present utility model in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. Those skilled in the art can make various changes in form and detail, including making several simple deductions or substitutions, without departing from the spirit and scope of the present utility model.

Claims

1. A grinding wheel anti-rotation device, characterized in that: include: A connecting member, comprising a connecting body, a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively connected to the connecting body vertically; the first connecting portion and the second connecting portion both extend along a first direction; the first connecting portion is provided with a first through hole, the second connecting portion is provided with a second through hole, and the first through hole and the second through hole both penetrate the connecting body along the first direction; A first screw, comprising a first screw head, wherein the first screw head abuts against an upper surface of the connecting body, and a portion of the first screw passes through the first through hole to be connected with a threaded hole on the protective cover; The second screw includes a second screw head, wherein the second screw head abuts against the upper surface of the connecting body, and a portion of the second screw passes through the second through hole to be connected with the threaded hole on the grinding wheel.

2. The grinding wheel anti-rotation device according to claim 1, characterized in that: The radial dimension of the first screw head is larger than the inner diameter of the first through hole.

3. The grinding wheel anti-rotation device according to claim 1, characterized in that: The radial dimension of the second screw head is larger than the inner diameter of the second through hole.

4. The grinding wheel anti-rotation device according to claim 1, characterized in that: The length of the first connection portion in the first direction is greater than the length of the second connection portion in the first direction.

5. The grinding wheel anti-rotation device according to claim 1, characterized in that: The second connection parts include two, and the two second connection parts are arranged at intervals along the length direction of the connection body, and the length direction of the connection body is perpendicular to the first direction.

6. The grinding wheel anti-rotation device according to claim 1, characterized in that: The connecting body comprises one or more avoidance holes, and the one or more avoidance holes are used to expose one or more fixing screws on the surface of the grinding wheel.

7. The grinding wheel anti-rotation device according to claim 1, characterized in that: The connecting body is provided with a first threaded hole and a second threaded hole at intervals. The first threaded hole is used for placing the first screw, and the second threaded hole is used for placing the second screw.

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