Anti-loose nut structure and electric two-wheeled vehicle

Abstract

This utility model relates to the field of fasteners and discloses an anti-loosening nut structure and an electric two-wheeler. It includes a nut body and a washer. The nut body is suitable for threaded connection with a threaded post or bolt. The washer is located on one side of the nut body and is suitable for an interference fit with the nut body. The inner circumferential wall of the washer is provided with multiple helical teeth spaced apart. When the washer and nut body are not in an interference fit, the nut body can rotate relative to the threaded post or bolt. When the washer and nut body are in an interference fit, the washer is compressed and contracts inward, so that all the helical teeth are locked with the threaded post or bolt. The helical teeth are suitable for limiting the rotation of the nut body along the loosening direction. The helical teeth of this utility model can resist the loosening of the nut. When the helical teeth are subjected to the force of nut loosening, the head of the helical teeth deforms and engages with the threaded post or bolt, forming a slightly locked state, making the nut less prone to loosening and improving the anti-loosening effect; it also improves the stability of the washer after installation.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and more specifically, to an anti-loosening nut structure and an electric two-wheeler. Background Technology

[0002] Electric two-wheelers are assembled from multiple parts, some of which are fastened together by nuts and threaded rods or bolts. To prevent the nuts from loosening, washers are usually used in conjunction with them. Existing nuts typically have a convex edge extending outwards from one end, with multiple circumferentially spaced helical teeth on the side of the convex edge closest to the washer; correspondingly, the side of the washer closest to the nut also has multiple circumferentially spaced helical teeth. When the nut is tightened, it presses against the washer, and the helical teeth on the convex edge and the washer interlock, thus preventing the nut from loosening. However, electric two-wheelers are constantly subjected to bumps and vibrations during operation, and the above structure, which only provides a tight fit between the nut and washer to prevent loosening, is not very effective. Utility Model Content

[0003] To address at least one of the aforementioned problems, this utility model first provides an anti-loosening nut structure, comprising a nut body and a washer. The nut body is adapted to be threadedly connected to a threaded post or bolt. The washer is located on one side of the nut body and is adapted to be interference-locked with the nut body. The inner circumferential wall of the washer is provided with multiple helical teeth spaced apart. When the washer and the nut body are not interference-locked, the nut body can rotate relative to the threaded post or bolt. When the washer and the nut body are interference-locked, the washer is compressed and contracts inward, so that the multiple helical teeth are all locked with the threaded post or bolt. The helical teeth are adapted to limit the rotation of the nut body in the loosening direction.

[0004] Optionally, the washer is provided with a linkage protrusion, and the nut body is provided with a linkage slot. The linkage protrusion is inserted into the linkage slot to facilitate the synchronous rotation of the washer and the nut body.

[0005] Optionally, multiple linkage slots are provided circumferentially on the nut body, and the linkage protrusion is adapted to be inserted into any one of the linkage slots.

[0006] Optionally, the washer has a deformation notch, and the nut body has a compression ring groove on the side near the washer. The washer is interference-fitted into the compression ring groove to drive the plurality of helical teeth to interfere with the threaded post or the bolt.

[0007] Optionally, the linkage protrusion is disposed on the outer wall of the gasket, the linkage slot and the compression ring groove are located on the same side of the nut body, and the linkage slot and the compression ring groove are in communication.

[0008] Optionally, the anti-loosening nut structure further includes a drive nut located on the side near the washer, the drive nut being adapted to push the washer to move and insert it into the compression ring groove.

[0009] Optionally, a protruding ring is fixed to the side of the drive nut near the washer, the outer diameter of the protruding ring being smaller than the inner diameter of the extrusion ring groove, so as to fully push the washer into the extrusion ring groove.

[0010] Optionally, the opening of the extrusion ring groove is provided with a chamfered bevel to facilitate the smooth entry of the gasket into the extrusion ring groove.

[0011] Optionally, the nut body has a mating groove on the side opposite to the washer, and the mating groove is adapted for the insertion of a corresponding component.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0013] 1. After the washer and the nut body are inserted, they rotate synchronously. The helical teeth on the inner circumference of the washer are interference-fitted with the threaded column or bolt. The direction of the helical teeth can resist the loosening of the nut body. When the helical teeth are subjected to the force of the nut body loosening, the head of the helical teeth will deform and bite into the threaded column or bolt, forming a slightly locked state, making the nut body less prone to loosening and improving the anti-loosening effect.

[0014] 2. When the gasket is not in the extrusion ring groove, it can be clearance-fitted with the threaded post or bolt to prevent damage to the helical teeth. After the gasket enters the extrusion ring groove, it will be interference-fitted with the extrusion ring groove. Under the action of the deformation notch, the gasket deforms and shrinks inward, thereby making multiple helical teeth interference-fitted with the threaded post or bolt, and maintaining a stable interference fit state. This not only ensures the convenience of installation, but also further improves the anti-loosening effect.

[0015] 3. After the nut body is installed in place, rotate the drive nut. The drive nut can push the washer to move closer to the nut body. Since the washer needs to be inserted into the compression ring groove with an interference fit, it is easier to apply force to the drive nut with a wrench so that the convex ring on the drive nut can completely push the washer into the compression ring groove, improving the stability of the washer after installation. In addition, after the washer is installed into the compression ring groove, the drive nut can be removed, thereby improving the convenience of installing the washer.

[0016] In addition, this utility model provides an electric two-wheeled vehicle, including the anti-loosening nut structure as described above.

[0017] Compared with the prior art, the electric two-wheeled vehicle described in this utility model has the same advantages as the above-mentioned anti-loosening nut structure, which will not be repeated here. Attached Figure Description

[0018] Figure 1 This is a diagram showing the usage state of the anti-loosening nut structure in the embodiments of this utility model;

[0019] Figure 2 This is a structural diagram of the nut body and washer in an embodiment of this utility model;

[0020] Figure 3 This is an exploded view of the nut body and washer in an embodiment of this utility model;

[0021] Figure 4 This is an exploded view of the nut body, washer, and drive nut in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Nut body; 11. Extrusion ring groove; 12. Chamfered bevel; 13. Linkage slot; 2. Washer; 21. Helical tooth; 22. Deformation notch; 23. Linkage protrusion; 3. Drive nut; 31. Protruding ring. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the following description is provided in conjunction with the appendix. Figure 1-4 This application will be described in further detail.

[0024] Firstly, this utility model embodiment provides an anti-loosening nut structure, referring to... Figure 1 and Figure 2 The anti-loosening nut structure includes a nut body 1 and a washer 2. The nut body 1 is threaded to a threaded post or bolt. The washer 2 is located on one side of the nut body 1 and is adapted to have an interference fit with the nut body 1. The inner circumferential wall of the washer 2 has multiple helical teeth 21 spaced apart. When the washer 2 is not in an interference fit with the nut body 1, the nut body 1 can rotate relative to the threaded post or bolt. When the washer 2 is in an interference fit with the nut body 1, the washer 2 rotates synchronously with the nut body 1. The washer 2 is compressed and contracts inward, causing all the helical teeth 21 to lock into the threaded post or bolt. The helical teeth 21 are suitable for limiting the rotation of the nut body 1 in the loosening direction, making it less likely for the nut body 1 to loosen from the threaded post or bolt, thus improving the anti-loosening effect.

[0025] Reference Figure 2 and Figure 3The nut body 1 has a compression ring groove 11 on the side near the washer 2. The compression ring groove 11 is connected to and concentric with the threaded hole of the nut body 1. After the nut body 1 is installed in place, the washer 2 is fitted onto the corresponding threaded post or bolt, and the washer 2 is inserted into the compression ring groove 11 with an interference fit. After the washer 2 is inserted into the compression ring groove 11 with an interference fit, the washer 2 will deform inward under the compression of the circumferential groove wall of the compression ring groove 11, thereby causing multiple helical teeth 21 to have an interference fit with the thread on the threaded post or bolt. The inclination direction of the helical teeth 21 is opposite to the direction of nut loosening, so the helical teeth 21 have an effect similar to a barbed structure after interference fit with the threaded post or bolt.

[0026] The gasket 2 has a deformation notch 22 that penetrates the gasket 2 radially and along its thickness. This allows the gasket 2 to have a clearance fit with the threaded post or bolt when it is not inserted into the compression ring groove 11, preventing damage to the helical teeth 21. After insertion into the compression ring groove 11, the groove wall compresses the gasket 2, causing it to deform inward under the action of the deformation notch 22. This deformation facilitates the interference fit between the multiple helical teeth 21 and the threaded post or bolt. Simultaneously, the compression from the circumferential groove wall of the compression ring groove 11 ensures a stable interference fit between the helical teeth 21 and the threaded post or bolt.

[0027] Reference Figure 2 and Figure 3 The inner edge of the compression ring groove 11 is provided with a chamfered bevel 12, which gradually slopes towards the outer peripheral wall of the nut body 1 in the direction in which the washer 2 is pulled out of the compression ring groove 11. Thus, when the washer 2 moves to the opening of the compression ring groove 11, the outer edge of the washer 2 first abuts against the chamfered bevel 12. After applying force to the washer 2, the washer 2 can shrink inward and deform under the action of the chamfered bevel 12 and the deformation notch 22, and then smoothly enter the compression ring groove 11.

[0028] Reference Figure 2 and Figure 3The outer wall of the washer 2 is integrally formed with a linkage protrusion 23. The nut body 1 has a linkage slot 13 on one side where the compression ring groove 11 is located, and the linkage slot 13 communicates with the compression ring groove 11. When the washer 2 is inserted into the compression ring groove 11, the linkage protrusion 23 is inserted into the linkage slot 13, thereby causing the washer 2 and the nut body 1 to move synchronously. In this embodiment, preferably, two linkage slots 13 are evenly spaced circumferentially on the nut body 1, and the linkage protrusion 23 can be inserted into any one of the linkage slots 13. In another embodiment, two or more linkage slots 13 are evenly spaced circumferentially on the nut body 1. In yet another embodiment, the number of linkage protrusions 23 and linkage slots 13 are the same and correspond one-to-one. In yet another embodiment, the compression ring groove 11 may not be provided, but the linkage protrusion 23 is located on the side of the washer 2 close to the nut body 1, and the helical teeth 21 directly interfere with the threaded post or bolt.

[0029] Reference Figure 2 and Figure 3 When the nut body 1 becomes loose, the washer 2 will rotate synchronously with the nut body 1. At this time, the helical teeth 21 can resist the loosening of the nut body 1. When the helical teeth 21 are subjected to the force of the loosening of the nut body 1, the head of the helical teeth 21 will deform and engage with the threaded column or bolt, forming a slightly locked state, making the nut body 1 less prone to loosening.

[0030] Reference Figure 3 and Figure 4 The nut body 1 has a mating groove on the side away from the washer 2, and the parts on the electric two-wheeled vehicle that mate with the nut body 1 can be inserted into the mating groove.

[0031] Combination Figure 1 Reference Figure 3 and Figure 4 The anti-loosening nut structure also includes a drive nut 3, which is threaded to the nut body 1 on the same threaded post or bolt. A washer 2 is located between the drive nut 3 and the nut body 1. After the nut body 1 is installed, rotating the drive nut 3 will push the washer 2 closer to the nut body 1. A raised ring 31 is integrally formed on the side of the drive nut 3 near the washer 2. The outer diameter of the raised ring 31 is smaller than the inner diameter of the compression ring groove 11. Therefore, the raised ring 31 can be inserted into the compression ring groove 11 to completely push the washer 2 into the compression ring groove 11. Furthermore, because the washer 2 is interference-fitted into the compression ring groove 11, a wrench can be used to apply force to the drive nut 3 more easily, causing the raised ring 31 to push the washer 2 into the compression ring groove 11.

[0032] The implementation principle of the anti-loosening nut structure in this application embodiment is as follows: First, the nut body 1 is installed and tightened. Then, the drive nut 3 is rotated, which pushes the washer 2 to the groove of the compression ring groove 11. At this time, the direction of the washer 2 is adjusted so that the linkage protrusion 23 is aligned with the linkage slot 13. Then, the drive nut 3 is rotated again, and the washer 2 is fully inserted into the compression ring groove 11 under the action of the protrusion ring 31. After the washer 2 enters the compression ring groove 11, the washer 2 deforms and contracts inward under the action of the groove wall of the compression ring groove 11 and the deformation notch 22, thereby causing multiple helical teeth 21 to have an interference fit with the threaded post or the thread on the bolt. Finally, the drive nut 3 is removed. The direction of the helical teeth 21 can resist the loosening of the nut body 1. When the helical teeth 21 are subjected to the force of the loosening of the nut body 1, the head of the helical teeth 21 will deform and bite into the threaded post or bolt, forming a slightly locked state, making the nut body 1 less prone to loosening and improving the tightening effect.

[0033] Secondly, another embodiment of the present invention provides an electric two-wheeled vehicle, including the anti-loosening nut structure described in the first aspect above.

[0034] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0035] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0038] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A structure for preventing loosening of a nut, characterized in that: The device includes a nut body (1) and a washer (2). The nut body (1) is adapted to be threaded to a threaded post or bolt. The washer (2) is located on one side of the nut body (1) and is adapted to be interference-locked with the nut body (1). The inner circumferential wall of the washer (2) is provided with a plurality of helical teeth (21) spaced apart. When the washer (2) is not interference-locked with the nut body (1), the nut body (1) can rotate relative to the threaded post or the bolt. When the washer (2) is interference-locked with the nut body (1), the washer (2) is squeezed inward to make the plurality of helical teeth (21) all lock with the threaded post or the bolt. The helical teeth (21) are adapted to limit the rotation of the nut body (1) in the loosening direction.

2. The anti-loosening nut structure according to claim 1, characterized in that: The washer (2) is provided with a linkage protrusion (23), and the nut body (1) is provided with a linkage slot (13). The linkage protrusion (23) is inserted into the linkage slot (13) to facilitate the synchronous rotation of the washer (2) and the nut body (1).

3. The anti-loosening nut structure according to claim 2, characterized in that: The linkage slots (13) are provided circumferentially on the nut body (1), and the linkage protrusions (23) are adapted to be inserted into any one of the linkage slots (13).

4. The anti-loosening nut structure according to claim 2, characterized in that: The washer (2) has a deformation notch (22), and the nut body (1) has a compression ring groove (11) on the side near the washer (2). The washer (2) is inserted into the compression ring groove (11) with an interference fit, so as to drive the multiple helical teeth (21) to have an interference fit with the threaded post or the bolt.

5. The anti-loosening nut structure according to claim 4, characterized in that: The linkage protrusion (23) is disposed on the outer wall of the gasket (2), the linkage slot (13) and the compression ring groove (11) are located on the same side of the nut body (1), and the linkage slot (13) and the compression ring groove (11) are connected.

6. The anti-loosening nut structure according to claim 4, characterized in that: It also includes a drive nut (3) located on the side close to the gasket (2), the drive nut (3) being adapted to push the gasket (2) to move and insert it into the compression ring groove (11).

7. The anti-loosening nut structure according to claim 6, characterized in that: The drive nut (3) has a protruding ring (31) fixed on the side near the washer (2). The outer diameter of the protruding ring (31) is smaller than the inner diameter of the extrusion ring groove (11) so as to push the washer (2) completely into the extrusion ring groove (11).

8. The anti-loosening nut structure according to any one of claims 4-7, characterized in that: The extrusion ring groove (11) has a chamfered bevel (12) at the opening to allow the gasket (2) to smoothly enter the extrusion ring groove (11).

9. The anti-loosening nut structure according to claim 8, characterized in that: The nut body (1) has a mating groove on the side away from the washer (2), and the mating groove is suitable for the insertion of the corresponding component.

10. An electric two-wheeled vehicle, characterized in that, Includes the anti-loosening nut structure as described in any one of claims 1-9.

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