Chopping knife

Abstract

The chopper comprises a cylinder component, a cone component and an anti-loosening assembly, and the cone component and the cylinder component are connected through a stud; the anti-loosening assembly is located between the cylinder part and the cone part, the anti-loosening assembly comprises two gaskets arranged on the stud in a sleeving mode, the two gaskets are clamped through a plurality of first tooth-shaped structures, and the gaskets abut against the cone part or the cylinder part through a plurality of second tooth-shaped structures; the first tooth-shaped structure is provided with a first tooth surface and a second tooth surface, the inclination angle of the first tooth surface is A, A is larger than B, and B is the lead angle of the stud. As the inclination angle of the first tooth surface is larger than the lead angle of the thread of the stud, the lift of the first tooth-shaped structure is larger than the lift of the thread on the stud. Therefore, when the cone component and the cylinder component tend to rotate and loosen, even if the gasket is subjected to torque from the cone component or the cylinder component, the gasket can further abut against the cone component or the cylinder component, and looseness prevention is achieved. The method can be widely applied to the technical field of integrated circuit production.

Description

Technical Field

[0001] The present application relates to the technical field of integrated circuit production, and in particular to a wrecking knife. Background Art

[0002] In the production process of semiconductor integrated circuits, it is usually necessary to connect the semiconductor bare chip pads with the I / O leads of the microelectronic package or the metal wiring pads on the substrate using metal wires (welding wires). The splitter is used as a welding tool. During packaging, the extremely fine metal wire runs through the splitter, and then the lead bonding of the semiconductor chip is completed by thermal ultrasonic bonding, that is, a chip is packaged on another chip or substrate using extremely fine metal wires.

[0003] There are many different types of splitters on the market, but most of them adopt an integrated structural design. Although the overall structure is simple, the wear rate of the wire outlet at the bottom of the traditional splitter is high. After a certain number of bonding packages, it needs to be replaced as a whole, which not only wastes resources, but also is not conducive to reducing production and processing costs. However, if the splitter is designed as a split and detachable structure, the blade head will be easy to loosen and fall off. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the present application provides a riving knife, and the technical solution adopted is as follows.

[0005] The riving knife provided in the present application includes a column component, a cone component and an anti-loosening component, wherein the cone component is connected to the column component by a stud; the anti-loosening component is located between the column component and the cone component, and the anti-loosening component includes two gaskets sleeved on the stud, and the end surfaces of the two gaskets close to each other are engaged with a plurality of first tooth-shaped structures, and the other end surface of the gasket abuts the cone component or the column component with a plurality of second tooth-shaped structures; wherein the first tooth-shaped structure has a first tooth surface and a second tooth surface, and the two gaskets are self-locking and anti-loosening through the mutual abutment of the second tooth surfaces, and with reference to a plane perpendicular to the longitudinal axis of the riving knife, the inclination angle of the first tooth surface is A, which satisfies: A>B, wherein B is the thread lead angle of the stud.

[0006] The present application has at least the following beneficial effects: in a splitter, when the cone component and the column component are connected by a stud locking connection, the cone component and the column component press the two gaskets of the anti-loosening assembly, the gasket clamps the end face of the cone component or the column component with the second tooth structure, and the two gaskets are engaged and clamped with the first tooth structure. When the cone component and the column component have a tendency to rotate and loosen, the first tooth structure can prevent the two gaskets from rotating relative to each other, and the second tooth structure can prevent the cone component or the column component from rotating, thereby preventing loosening. If the inclination angle of the first tooth surface in the first tooth structure is greater than the thread lead angle of the stud, then the lift of the first tooth structure is greater than the lift of the thread on the stud. When the gasket is subjected to torque from the cone component or the column component, the gasket can further press the cone component or the column component, thereby preventing loosening. The present application can be widely used in the field of integrated circuit production technology.

[0007] In certain embodiments of the present application, with a plane perpendicular to the longitudinal axis of the riving cutter as a reference, the angle of the second tooth surface is C, satisfying: C>A.

[0008] In certain embodiments of the present application, the second tooth-shaped structure has a third tooth surface and a fourth tooth surface, and when the conical component or the cylindrical component is rotated to loosen, the fourth tooth surface applies resistance to the conical component or the cylindrical component.

[0009] In certain embodiments of the present application, with reference to a plane perpendicular to the longitudinal axis of the riving cutter, the inclination angle of the third tooth surface is D, and the angle of the fourth tooth surface is E, satisfying: E>D.

[0010] In certain embodiments of the present application, the thickness of the gasket is L1, satisfying: 0.5mm≤L1≤0.505mm.

[0011] In certain embodiments of the present application, the outer radius of the gasket is R1, satisfying: 1.583mm≤R1≤1.586mm.

[0012] In certain embodiments of the present application, a threaded hole is provided at one end of the column component, and the stud is integrally formed with the cone component.

[0013] In certain embodiments of the present application, a threaded hole is provided at one end of the cone component, and the stud is integrally formed with the column component.

[0014] In some embodiments of the present application, a threaded hole is provided at one end of the cone component, and a threaded hole is provided at one end of the column component.

[0015] The riving knife provided in the present application comprises a column component, a cone component and an anti-loosening assembly, wherein the cone component is connected to the column component by a stud; the anti-loosening assembly is located between the column component and the cone component, and the anti-loosening assembly comprises two first gaskets and at least one second gasket, wherein the first gasket and the second gasket are both sleeved on the stud, and the second gasket is located between the two first gaskets, and the end surface of the first gasket facing the second gasket is provided with a plurality of first tooth-shaped structures, and the other end surface of the first gasket is provided with a plurality of second tooth-shaped structures, and the two end surfaces of the second gasket are both provided with a plurality of first tooth-shaped structures; wherein the first tooth-shaped structure has a first tooth surface and a second tooth surface, and the end surface of the first gasket and the end surface of the second gasket are both self-locking and anti-loosening through the mutual abutment of the second tooth surface, and with reference to a plane perpendicular to the longitudinal axis of the riving knife, the inclination angle of the first tooth surface is A, which satisfies: A>B, wherein B is the thread lead angle of the stud.

[0016] The present application has at least the following beneficial effects: in the splitter, when the cone part and the column part are connected by the stud locking, the cone part and the column part press the first gasket and the second gasket of the anti-loosening assembly, the first gasket clamps the end face of the cone part or the column part with the second tooth structure, and the first gasket and the second gasket are engaged and clamped with the first tooth structure, when the cone part and the column part have a tendency to rotate and loosen, the first tooth structure can prevent the first gasket and the second gasket from rotating relative to each other, and the second tooth structure can prevent the cone part or the column part from rotating, thereby preventing loosening. If the inclination angle of the first tooth surface in the first tooth structure is greater than the thread lead angle of the stud, the lift of the first tooth structure is greater than the lift of the thread on the stud, and when the first gasket is subjected to torque from the cone part or the column part, the first gasket can further press the cone part or the column part, thereby preventing loosening. The present application can be widely used in the field of integrated circuit production technology.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further illustrated below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0019] Figure 1 This is a structural diagram of a splitting knife.

[0020] Figure 2 This is a structural diagram of a splitting knife.

[0021] Figure 3 This is a structural diagram of the gasket.

[0022] Figure 4 This is a structural diagram of the gasket.

[0023] Reference numerals: cylindrical component 110 ; conical component 120 ; gasket 200 ; first tooth-shaped structure 210 ; second tooth-shaped structure 220 ; first tooth surface 221 ; second tooth surface 222 ; third tooth surface 223 ; fourth tooth surface 224 . DETAILED DESCRIPTION

[0024] Combine the following Figures 1 to 4 The embodiments of the present application are described in detail, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0025] In the description of the present application, it should be understood that the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In the description of the present application, if there is a description with reference to the terms "one embodiment", "some embodiments", "an embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", "some examples", etc., it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0029] The present application relates to a riving knife, which includes a column component 110 and a cone component 120. The cone component 120 is connected to the column component 110 through a stud. The column component 110 serves as a handle of the riving knife, and the cone component 120 has a tip head of the riving knife. Further, the riving knife includes an anti-loosening component, which is sleeved on the stud and located between the column component 110 and the cone component 120. The anti-loosening component is used to prevent the cone component 120 from loosening from the column component 110.

[0030] Specifically, the anti-loosening assembly includes two gaskets 200 sleeved on the studs, the gaskets 200 are provided with a central through hole, the two gaskets 200 are stacked and arranged close to each other, one gasket 200 is close to the column part 110, and the other gasket 200 is close to the cone part 120.

[0031] Further, the end surface of one end of the gasket 200 is provided with a plurality of first tooth-shaped structures 210, and the plurality of first tooth-shaped structures 210 are formed into a toothed disc shape on one end surface of the gasket 200. The end surface of the other end of the gasket 200 is provided with a plurality of second tooth-shaped structures 220, and the plurality of second tooth-shaped structures 220 are formed into a toothed disc shape on the other end surface of the gasket 200.

[0032] The end surfaces of the two washers 200 that are close to each other are engaged with a plurality of first tooth structures 210 to increase friction and bite force, thereby preventing relative rotation between the two washers 200, thereby achieving self-locking of the anti-loosening assembly. The other end surface of the washers 200 is abutted against the cone component 120 or the column component 110 with a plurality of second tooth structures 220, thereby preventing relative rotation between the cone component 120 and the washers 200 or between the column component 110 and the washers 200, thereby achieving anti-loosening between the column component 110 and the cone component 120.

[0033] When the column component 110 and the cone component 120 are connected by stud locking, the two gaskets 200 of the anti-loosening assembly are pressed between the column component 110 and the cone component 120. In this case, the two gaskets 200 are engaged and clamped with each other by the first tooth-shaped structure 210. The gasket 200 close to the column component 110 presses the end face of the column component 110 with the second tooth-shaped structure 220, and the second tooth-shaped structure 220 has a clamping effect on the end face of the column component 110. Correspondingly, the gasket 200 close to the cone component 120 presses the end face of the cone component 120 with the second tooth-shaped structure 220, and the second tooth-shaped structure 220 has a clamping effect on the end face of the cone component 120.

[0034] It is understandable that the first tooth-shaped structure 210 has a first tooth surface 221 and a second tooth surface 222. At least one of the first tooth surface 221 and the second tooth surface 222 is arranged obliquely, thereby forming the first tooth-shaped structure 210. Further, the two gaskets 200 are self-locking and anti-loosening through the mutual abutment of the second tooth surface 222. Specifically, when the cone component 120 or the column component 110 has a tendency to rotate and loosen, the first tooth-shaped structures 210 of the two gaskets 200 are abutted against each other by the second tooth surface 222, so that the two gaskets 200 cannot rotate, thereby achieving self-locking and anti-loosening.

[0035] On the gasket 200 for clamping the column component 110, the second tooth surface 222 of the first tooth structure 210 is oriented in the same direction as the column component 110 is tightened relative to the cone component 120. On the gasket 200 for clamping the cone component 120, the second tooth surface 222 of the first tooth structure 210 is oriented in the same direction as the cone component 120 is tightened relative to the column component 110. In this case, when the cone component 120, the column component 110 and the stud are tightened, the second tooth surface 222 of the first tooth structure 210 between the two gaskets 200 can gradually bite and clamp.

[0036] It should be noted that, with reference to the plane perpendicular to the axis of the length direction of the splitter, the first tooth surface 221 is inclined, and the inclination angle of the first tooth surface 221 is A. Further, it satisfies: A>B, where B is the thread lead angle of the stud. This situation can be regarded as: the lead angle of the first tooth structure 210 on the gasket 200 is greater than the thread lead angle of the stud, and the linear displacement generated by a circle of threads on the stud in the axial direction along the length direction of the splitter is less than the maximum linear displacement when two gaskets 200 close to each other rotate relative to each other.

[0037] It is understandable that the tooth top height of the first tooth-shaped structure 210 is greater than or equal to the pitch of the stud. Specifically, the tooth top height of the first tooth-shaped structure 210 is in the range of [0.15 mm, 0.2 mm], and the pitch of the stud is in the range of [0.1 mm, 0.15 mm].

[0038] When the column component 110 or the cone component 120 is loosened due to vibration, since one of the gaskets 200 is clamped with the column component 110 by the second tooth structure 220, and the other gasket 200 is clamped with the cone component 120 by the second tooth structure 220, the column component 110 or the cone component 120 applies torque to the corresponding gasket 200. On the one hand, since the first tooth structures 210 between the two gaskets 200 are engaged and clamped with each other. On the other hand, since the column component 110 and the cone component 120 press the two gaskets 200, the two gaskets 200 still keep close to each other, and the linear displacement of the column component 110 or the cone component 120 per rotation is less than the maximum linear displacement of the two gaskets 200 during relative rotation, and the linear displacement of the column component 110 or the cone component 120 is insufficient to meet the maximum linear displacement requirement of the two gaskets 200 during relative rotation. Therefore, even if the gasket 200 is subjected to torque, the two gaskets 200 cannot rotate relative to each other, and the gasket 200 can further tighten the end surfaces of the column component 110 and the cone component 120, thereby achieving anti-loosening and self-locking.

[0039] In some examples, 30°≤A≤45°, and 5°≤AB≤8°, to improve the self-locking capability and be more suitable for high vibration environments.

[0040] In some implementations, the first tooth-shaped structure 210 of the gasket 200 is configured as a unidirectional tooth-shaped structure to enhance the self-locking and anti-loosening effects of the gasket 200 .

[0041] Specifically, with reference to a plane perpendicular to the longitudinal axis of the riving cutter, the angle of the second tooth surface 222 is C, satisfying: C>A. In this case, the second tooth surface 222 is steeper than the first tooth surface 221, and the first tooth structure 210 is formed in a sawtooth shape or a wedge tooth shape.

[0042] In some examples, 0<C≤90°. It can be understood that the second tooth surface 222 can be arranged obliquely or vertically.

[0043] In some examples, 20°≤CA≤60°. If CA is less than 20°, the inclination of the second tooth surface 222 is too large, which is not conducive to the self-locking between the two gaskets 200. If CA is greater than 60°, the first tooth surface 221 is steeper than the second tooth surface 222, and the self-locking effect between the two gaskets is deteriorated.

[0044] In some embodiments, the second tooth-shaped structure 220 has a third tooth surface 223 and a fourth tooth surface 224. At least one of the third tooth surface 223 and the fourth tooth surface 224 is arranged obliquely, thereby forming the second tooth-shaped structure 220. Compared with the first tooth-shaped structure 210, the second tooth-shaped structure 220 is configured as fine teeth, which helps to enhance the force of the second tooth-shaped structure 220 on the end of the column component 110 or the cone component 120.

[0045] Furthermore, when the cone component 120 or the column component 110 rotates and loosens, the fourth tooth surface 224 applies resistance to the cone component 120 or the column component 110, thereby playing a role in preventing loosening.

[0046] It should be noted that, with reference to a plane perpendicular to the longitudinal axis of the riving cutter, the third tooth surface 223 is arranged tilted, and the inclination angle of the third tooth surface 223 is D, and the angle of the fourth tooth surface 224 is E.

[0047] In some examples, E>D is satisfied. In this case, the fourth tooth surface 224 is steeper than the third tooth surface 223 , and the second tooth-shaped structure 220 is formed in a sawtooth shape or a wedge-shaped tooth shape.

[0048] In some examples, 0<E≤90°. It can be understood that the fourth tooth surface 224 can be arranged obliquely or vertically.

[0049] In some examples, 25°≤ED≤60°. If ED is less than 25°, the protrusion of the second tooth-shaped structure 220 is too long, the contact area with the column component 110 or the cone component 120 is too small, the pressure is too large, and the surface of the column component 110 or the cone component 120 is easily scratched. If ED is greater than 60°, the protrusion of the second tooth-shaped structure 220 is too small, the friction force is small, and it is not conducive to biting and locking.

[0050] In some implementations, the thickness of the gasket 200 is L1, which satisfies: 0.5 mm ≤ L1 ≤ 0.505 mm, thereby ensuring the accuracy of the splitting knife and avoiding affecting the ultrasonic transmission efficiency during operation.

[0051] In some implementations, the outer radius of the gasket 200 is R1, which satisfies: 1.583 mm ≤ R1 ≤ 1.586 mm, thereby ensuring the accuracy of the splitting knife and avoiding affecting the ultrasonic transmission efficiency during operation.

[0052] In some embodiments, a threaded hole is provided at one end of the column component 110 , and the threaded hole is extended along the central axis of the length direction of the column component 110 . The stud is integrally formed with the cone component 120 , and the stud is located at the end of the cone component 120 .

[0053] It can be understood that the stud is threadedly connected to the inner wall of the threaded hole, thereby achieving the connection between the cone component 120 and the column component 110.

[0054] In some examples, the length of the column component 110 ranges from [6.11 mm, 6.12 mm], the depth of the threaded hole ranges from [1 mm, 1.05 mm], the inner diameter ranges from [0.75 mm, 0.8 mm], and the outer diameter ranges from [0.9 mm, 1.4 mm].

[0055] In some examples, the length of the cone component 120 including the stud is in the range of [6 mm, 6.05 mm], and the outer diameter of the thread of the stud is in the range of [0.9 mm, 1.4 mm].

[0056] In some examples, the outer side wall of the column component 110 is provided with a flat surface so that a wrench can clamp the column component 110 .

[0057] In some examples, the outer side wall of the cone component 120 is provided with a flat surface so that a wrench can clamp the cone component 120 .

[0058] Regarding the structures of the column component 110 , the stud and the cone component 120 , there are at least the following alternative embodiments.

[0059] In some alternative embodiments, a threaded hole is provided at one end of the cone component 120 , and the threaded hole is extended along the central axis of the length direction of the cone component 120 . The stud is integrally formed with the column component 110 , and the stud is located at the end of the column component 110 .

[0060] In some alternative embodiments, a threaded hole is provided at one end of the cone component 120, and a threaded hole is provided at one end of the column component 110, and both ends of the stud are threadedly connected to the inner walls of the threaded holes of the cone component 120 and the column component 110 respectively.

[0061] Based on the introduction of the above-mentioned riving knife structure, the anti-loosening component also has the following replaceable implementation methods.

[0062] As a replaceable embodiment, the anti-loosening assembly includes a first gasket and a second gasket, the first gasket is set to two, the second gasket is set to at least one, the first gasket and the second gasket are both provided with a central through hole, the first gasket and the second gasket are both sleeved on the stud, and the second gasket is located between the two first gaskets.

[0063] It can be understood that when the cone component and the column component are locked and connected by means of the studs, the first gasket and the second gasket are pressed tightly between the column component and the cone component.

[0064] Furthermore, the end surface of the first gasket facing the second gasket is provided with a plurality of first tooth-shaped structures, the other end surface of the first gasket is provided with a plurality of second tooth-shaped structures, and both end surfaces of the second gasket are provided with a plurality of first tooth-shaped structures. One end surface of the first gasket is engaged and clamped with the second gasket by the first tooth-shaped structure, and the other end surface of the first gasket abuts against the cone component or the column component by the second tooth-shaped structure.

[0065] It should be noted that the first tooth-shaped structure has a first tooth surface and a second tooth surface, and the end surface of the first gasket and the end surface of the second gasket are both self-locking and anti-loosening through the mutual abutment of the second tooth surface.

[0066] In some examples, there is one second gasket. In this case, at two end faces of the second gasket, the second gasket abuts against the second tooth face of the first tooth face of the corresponding first gasket end face with the second tooth face of the first tooth face of the first gasket.

[0067] In some other examples, at least two second gaskets are provided. In this case, the adjacent first gaskets and the second gaskets abut against each other with the second tooth surfaces of the first tooth-shaped structure, and the adjacent second gaskets abut against each other with the second tooth surfaces of the first tooth-shaped structure.

[0068] It should be noted that more designs of the first tooth-shaped structure and the second tooth-shaped structure are as described above.

[0069] The above is a detailed description of the implementation methods of the present application in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A riving knife, characterized in that: include Column parts; A cone component, wherein the cone component is connected to the column component via a stud; An anti-loosening component, the anti-loosening component is located between the column component and the cone component, the anti-loosening component includes two washers sleeved on the stud, the end surfaces of the two washers close to each other are engaged with each other by a plurality of first tooth-shaped structures, and the other end surface of the washers abuts against the cone component or the column component by a plurality of second tooth-shaped structures; Among them, the first tooth-shaped structure has a first tooth surface and a second tooth surface, and the two gaskets achieve self-locking and anti-loosening through the mutual abutment of the second tooth surfaces. Taking the plane perpendicular to the longitudinal axis of the riving cutter as a reference, the inclination angle of the first tooth surface is A, satisfying: A>B, where B is the thread lead angle of the stud.

2. The riving knife according to claim 1, characterized in that: With reference to a plane perpendicular to the longitudinal axis of the riving cutter, the angle of the second tooth surface is C, satisfying: C>A.

3. The riving knife according to claim 1 or 2, characterized in that: The second tooth-shaped structure has a third tooth surface and a fourth tooth surface. When the cone component or the column component is rotated and loosened, the fourth tooth surface applies resistance to the cone component or the column component.

4. The riving knife according to claim 3, characterized in that: With a plane perpendicular to the longitudinal axis of the riving cutter as a reference, the inclination angle of the third tooth surface is D, and the angle of the fourth tooth surface is E, satisfying: E>D.

5. The riving knife according to claim 1, characterized in that: The thickness of the gasket is L1, which satisfies: 0.5mm≤L1≤0.505mm.

6. The riving knife according to claim 1 or 5, characterized in that: The outer radius of the gasket is R1, which satisfies: 1.583mm≤R1≤1.586mm.

7. The riving knife according to claim 1, characterized in that: A threaded hole is provided at one end of the column component, and the stud is integrally formed with the cone component.

8. The riving knife according to claim 1, characterized in that: A threaded hole is provided at one end of the cone component, and the stud is integrally formed with the column component.

9. The riving knife according to claim 1, characterized in that: One end of the cone component is provided with a threaded hole, and one end of the column component is provided with a threaded hole.

10. A riving knife, characterized in that: The replacement design of the riving knife according to any one of claims 1 to 9 is that the anti-loosening assembly includes two first gaskets and at least one second gasket, the first gasket and the second gasket are both sleeved on the stud, the second gasket is located between the two first gaskets, the end surface of the first gasket facing the second gasket is provided with a plurality of first tooth-shaped structures, the other end surface of the first gasket is provided with a plurality of second tooth-shaped structures, and both end surfaces of the second gasket are provided with a plurality of first tooth-shaped structures; Among them, the first tooth structure has a first tooth surface and a second tooth surface, and the end surface of the first gasket and the end surface of the second gasket are self-locking and anti-loosening through the mutual abutment of the second tooth surface. Taking the plane perpendicular to the longitudinal axis of the riving cutter as a reference, the inclination angle of the first tooth surface is A, which satisfies: A>B, where B is the thread lead angle of the stud.

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