Anti-following-rotation structure for nut
By setting the cross-angle structure between the hook and the slot between the nut and the counterpart, the following rotation problem during the nut is solved, and the stable fixation and efficient tightening of the nut is achieved, which improves production efficiency and connection reliability.
Patent Information
- Application Number
- CN202422612996.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-28
AI Technical Summary
Nuts are prone to follow-up rotation during tightening, resulting in the inability to hit the torque, affecting production efficiency and torque detection quality.
A nut anti-rotating structure is designed. By setting a hook and a slot between the nut and the counterpart, the hook and the slot cross to form an angle to limit the movement of the nut in the circumferential and axial directions, ensuring the fixation between the nut and the counterpart.
Effectively prevent the nut from following and rotating, improve the production rhythm, ensure the stability and safety of threaded connections, avoid the nut falling, simplify the tightening process, and reduce costs.
Smart Images
Figure CN223152522U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of automotive parts, particularly to the technical field of nuts, and specifically to an anti-rotation structure for nuts. Background Art
[0002] In vehicle assembly, the connection form of bolts and nuts is commonly used. During assembly, whether tightening the bolt or the nut, the follow-up rotation phenomenon will occur because the frictional torque of the support surface of the non-tightened bolt or nut is less than the frictional torque of the thread pair, or when tightening in the initial suspended state, and the torque cannot be applied in place. Workers need to manually fix the rotating connectors with a wrench, which seriously affects production efficiency and increases labor and time costs. In addition, when measuring the static torque of the bolt, the nut may also rotate, resulting in false torque and affecting the quality of torque detection. Utility Model Content
[0003] This application provides an anti-rotation structure for nuts to solve the problem of nut rotation during nut tightening.
[0004] To solve the above technical problem, the first technical solution provided by this application is: an anti-rotation structure for nuts, including a nut and a mating part; the nut includes a nut body and a flange fixed to the end face of the nut body, the flange has a flange connection surface facing away from the nut body, and the mating part has an assembly surface that can face the flange connection surface; one of the flange connection surface and the assembly surface is provided with a hook, and the other is provided with a slot. The hook includes an anti-rotation part and an anti-falling part, and the anti-rotation part and the anti-falling part intersect to form an angle. The slot includes an anti-rotation slot part and an anti-falling slot part, and the anti-rotation slot part and the anti-falling slot part also intersect to form an angle; the hook and the slot are configured such that the hook axially embeds into the anti-rotation slot part along the nut to limit the circumferential movement of the nut relative to the mating part along the nut, and the hook moves circumferentially along the nut to the anti-falling part embedding into the anti-falling slot part to limit the axial movement of the nut relative to the mating part away from the mating part along the nut.
[0005] According to an embodiment of this application, the anti-rotation part is parallel to the axis of the nut, and the anti-falling part extends circumferentially along the nut; correspondingly, the anti-rotation slot part is parallel to the axis of the nut, and the anti-falling slot part extends circumferentially along the nut.
[0006] According to an embodiment of this application, the anti-falling part is perpendicular to the axis of the nut, or the anti-falling part extends spirally along the axis of the nut; correspondingly, the anti-falling slot part is perpendicular to the axis of the nut, or the anti-falling slot part extends spirally along the axis of the nut.
[0007] According to an embodiment of the present application, the projection of the hook on the flange connection surface is in an arc strip shape and extends along the circumference of the nut, and the projection of the slot on the assembly surface is also in an arc strip shape and extends along the circumference of the nut.
[0008] According to an embodiment of the present application, the dimension of the anti-rotation groove portion along the circumference of the nut is equal to or greater than the dimension of the hook along the circumference of the nut; and / or, the dimension of the anti-falling groove portion along the circumference of the nut is equal to or greater than the dimension of the anti-falling portion along the circumference of the nut, and the dimension of the anti-falling groove portion along the axial direction of the nut is equal to or greater than the dimension of the anti-falling portion along the axial direction of the nut; and / or, the height difference between the anti-rotation groove portion and the anti-falling groove portion along the axial direction of the nut is equal to or less than the height difference between the anti-rotation portion and the anti-falling portion along the axial direction of the nut.
[0009] According to an embodiment of the present application, the hook and the slot have the same dimension along the axial direction of the nut, and the anti-rotation portion and the anti-rotation groove portion have the same dimension along the axial direction of the nut, so that the flange connection surface fits the assembly surface.
[0010] According to an embodiment of the present application, the hook is provided on the nut, and the slot is provided on the mating member.
[0011] According to an embodiment of the present application, the nut body, the flange and the hook are integrally formed.
[0012] According to an embodiment of the present application, the number of the hooks on the nut is multiple, and the multiple hooks are evenly arranged along the circumference of the nut; the number of the slots on the mating member is also multiple and corresponds to the number of the hooks, and the multiple hooks are evenly arranged along the circumference of the mating member.
[0013] According to an embodiment of the present application, the central angles corresponding to the anti-rotation portion and the anti-falling portion in each hook are both 10 degrees, and the central angle corresponding to the anti-falling groove portion in each slot is 12 - 13 degrees.
[0014] The beneficial effects of the present application are as follows:
[0015] For the nut anti-rotation structure provided by the present application, the nut and the mating member can be connected by the hook being embedded in the slot, avoiding the relative movement of the nut relative to the mating member along the circumference of the nut, thereby ensuring that the nut will not rotate, improving the production beat, ensuring the stability and safety of the threaded connection, and the anti-falling portion of the hook can also be embedded in the anti-falling groove portion of the slot, so that the nut is fixed on the assembly surface of the mating member and will not fall off. Description of the Drawings
[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings, where:
[0017] Figure 1 is a schematic diagram of an embodiment of the nut anti-rotation structure provided by the present application;
[0018] Figure 2 is Figure 1 the front view of the nut in the nut anti-rotation structure of;
[0019] Figure 3 is Figure 2 the bottom view of the nut of;
[0020] Figure 4 is Figure 1 the front view of the mating part in the nut anti-rotation structure of;
[0021] Figure 5 is Figure 4 the top view of the mating part of;
[0022] Figure 6 is a schematic diagram of the process of the hook being inserted into the slot in the present application.
[0023] Explanation of reference numerals:
[0024] Nut 100
[0025] Nut body 110
[0026] Flange 120
[0027] Flange connection surface 121
[0028] Hook 130
[0029] Anti-rotation part 131
[0030] Anti-falling part 132
[0031] Nut through hole 1000
[0032] Mating part 200
[0033] Assembly surface 201
[0034] Slot 210
[0035] Anti-rotation groove part 211
[0036] Anti-falling groove part 212
[0037] Bolt hole 2000 Detailed implementation manners
[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present application.
[0039] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0040] The present application provides a nut anti-rotation structure. A hook is provided on one of the flange of the nut and the mating part, and a slot is provided on the other. Through the cooperation of the hook and the slot, the relative movement of the nut and the mating part in the circumferential and axial directions of the nut is restricted, so that the problem of the nut rotating with the bolt during nut tightening can be solved. The structure and function of the present application will be specifically described below with reference to the accompanying drawings.
[0041] Please refer to Figure 1 , Figure 1 which is a schematic diagram of an embodiment of the nut anti-rotation structure provided by the present application. The nut anti-rotation structure includes a nut 100 and a mating part 200. It should be noted that the nut 100 and the mating part 200 are connected and fastened by fasteners such as bolts. The nut 100 has a nut through-hole 1000, and the mating part 200 has a bolt hole 2000. The bolt is screwed through the bolt hole 2000 on the mating part 200 and the nut through-hole 1000 of the nut 100. Through the thread fit between the bolt and the bolt hole 2000 and the nut through-hole 1000, the fastening of the bolt and the nut 100 is realized. The mating part 200 can be a part to be assembled on an automobile.
[0042] Combined with Figure 2 and Figure 3 , Figure 2 is Figure 1 the front view of the nut 100 in the nut anti-rotation structure of Figure 3 is Figure 2 the bottom view of the nut 100 of Figure 4 and Figure 5 , Figure 4 isFigure 1 Front view of the mating part 200 in the anti-rotation structure of the nut Figure 5 is Figure 4 Top view of the mating part 200. The mating part 200 has an assembly surface 201 that can face the flange connection surface 121.
[0043] One of the flange connection surface 121 and the assembly surface 201 is provided with a hook 130, and the other is provided with a slot 210. The hook 130 includes an anti-rotation portion 131 and an anti-falling portion 132. The anti-rotation portion 131 and the anti-falling portion 132 intersect to form an angle. The slot 210 includes an anti-rotation groove portion 211 and an anti-falling groove portion 212. The anti-rotation groove portion 211 and the anti-falling groove portion 212 also intersect to form an angle. The meaning that the anti-rotation portion 131 and the anti-falling portion 132 intersect to form an angle means that the anti-rotation portion 131 and the anti-falling portion 132 are not parallel and there is a certain angle between them. The meaning that the anti-rotation groove portion 211 and the anti-falling groove portion 212 intersect to form an angle means that the anti-rotation groove portion 211 and the anti-falling groove portion 212 are not parallel and there is a certain angle between them.
[0044] The hook 130 and the slot 210 are configured such that the hook 130 is axially inserted into the anti-rotation groove portion 211 along the axis of the nut 100 to limit the circumferential movement of the nut 100 relative to the mating part 200, and the hook 130 moves circumferentially along the nut 100 until the anti-falling portion 132 is inserted into the anti-falling groove portion 212 to limit the axial movement of the nut 100 relative to the mating part 200 away from the mating part 200.
[0045] Please refer to Figure 6 , Figure 6 is a schematic diagram of the process of the hook 130 being inserted into the slot 210 in this application, and Figure 6 is a schematic diagram after the hook 130 and the slot 210 are unfolded along the circumferential plane of the nut 100 to more clearly show the movement process of the hook 130 along the axis and circumference of the nut 100. Specifically, the nut 100 first moves axially along its own axis, so that the anti-rotation portion 131 and the anti-falling portion 132 of the hook 130 are integrally inserted into the anti-rotation groove portion 211 of the slot 210, and then the nut 100 moves circumferentially along its own axis, so that the anti-falling portion 132 of the hook 130 is inserted into the anti-falling groove portion 212 of the slot 210.
[0046] It can be seen that in the present application, between the nut 100 and the mating part 200, the hook 130 can be inserted into the slot 210 to prevent relative movement between the nut 100 and the mating part 200 along the circumferential direction of the nut 100, thereby ensuring that the nut 100 will not rotate. The anti-drop portion 132 of the hook 130 can also be inserted into the anti-drop slot portion 212 of the slot 210, so that the nut 100 is fixed on the mating surface 201 of the mating part 200 and will not fall off. And since the nut 100 has been fixed to the mating part 200 in advance before screwing the bolt, when screwing the bolt, there is no need to manually fix the nut 100, nor is there a need for additional equipment to fix the nut 100, which is simple, convenient, low-cost and highly efficient.
[0047] In the present application, the anti-rotation and anti-drop of the nut 100 are realized through the mutual engagement between the hook 130 and the slot 210 between the nut 100 and the mating part 200. Figures 1 to 5 The situation where the hook 130 is arranged on the flange connection surface 121 and the slot 210 is arranged on the mating surface 201 is shown. And in order to ensure the anti-drop effect on the nut 100 after the anti-drop portion 132 and the anti-drop slot portion 212 are engaged, the anti-drop portion 132 is arranged at an interval from the flange connection surface 121, and the anti-drop slot portion 212 is arranged at an interval from the mating surface 201. It can be understood that in other embodiments, it can also be that the slot 210 is arranged on the flange connection surface 121 and the hook 130 is arranged on the mating surface 201, or both the flange connection surface 121 and the mating surface 201 are provided with the hook 130 and the slot 210, and the hook 130 on the flange connection surface 121 cooperates with the slot 210 on the mating surface 201, and the slot 210 on the flange connection surface 121 cooperates with the hook 130 on the mating surface 201.
[0048] In one embodiment, the nut body 110, the flange 120 and the hook 130 are integrally formed. In another embodiment, the nut body 110, the flange 120 and the hook 130 can also be separately arranged. And since the hook 130 needs to be inserted into the slot 210 to realize the anti-rotation and anti-drop of the nut 100, the hook 130 should have sufficient strength to avoid breakage and damage during the fastening process. Therefore, a material with greater strength should be selected for the hook 130.
[0049] In one embodiment, the number of hooks 130 on the nut 100 is multiple, and the multiple hooks 130 are evenly arranged along the circumferential direction of the nut 100; the number of slots 210 on the mating part 200 is also multiple and corresponds to the number of hooks 130, and the multiple hooks 130 are evenly arranged along the circumferential direction of the mating part 200. In this embodiment, through the corresponding engagement of the multiple hooks 130 and the multiple slots 210, the fixing effect between the nut 100 and the mating part 200 can be increased, and the force on a single hook 130 can be reduced, avoiding damage due to excessive force on a single hook 130. Figures 1 to 5It shows a case where the number of hooks 130 on the nut 100 is three, and the number of slots 210 on the mating part 200 also corresponds to three. It can be understood that in other embodiments, the number of hooks 130 and slots 210 can also be one, two, four, five, etc.
[0050] In one embodiment, the anti-rotation portion 131 is parallel to the axial direction of the nut 100, and the anti-falling portion 132 extends along the circumferential direction of the nut 100, that is, the hook 130 as a whole is an L-shaped boss structure; correspondingly, the anti-rotation groove portion 211 is parallel to the axial direction of the nut 100, and the anti-falling groove portion 212 extends along the circumferential direction of the nut 100, that is, the slot 210 as a whole is an L-shaped groove structure.
[0051] In this embodiment, since the anti-rotation portion 131 and the anti-rotation groove portion 211 are parallel to the axial direction of the nut 100, the nut 100 can move in a direction parallel to the axial direction of the nut 100 so that the hook 130 as a whole is embedded in the anti-rotation groove portion 211 of the slot 210. And since the anti-falling portion 132 extends along the circumferential direction of the nut 100 and the anti-falling groove portion 212 extends along the circumferential direction of the nut 100, the anti-falling portion 132 of the hook 130 can be embedded in the anti-falling groove portion 212 of the slot 210 along the circumferential direction of the nut 100, and the shapes of the anti-falling portion 132 and the anti-falling groove portion 212 are more matched, making the two more fitting, and the hook 130 can be tightly clamped in the slot 210.
[0052] In one embodiment, the anti-falling portion 132 is perpendicular to the axial direction of the nut 100, and correspondingly, the anti-falling groove portion 212 is perpendicular to the axial direction of the nut 100. Therefore, after the hook 130 is embedded in the anti-rotation groove portion 211 of the slot 210, the nut 100 can rotate in place to embed the anti-falling portion 132 of the hook 130 in the anti-falling groove portion 212 of the slot 210. In another embodiment, the anti-falling portion 132 extends spirally along the axial direction of the nut 100, and correspondingly, the anti-falling groove portion 212 extends spirally along the axial direction of the nut 100. Therefore, after the hook 130 is embedded in the anti-rotation groove portion 211 of the slot 210, the nut 100 can perform its own spiral movement and can also embed the anti-falling portion 132 of the hook 130 in the anti-falling groove portion 212 of the slot 210.
[0053] Further, the projection of the catch 130 on the flange connection surface 121 is in an arc-shaped strip and extends along the circumferential direction of the nut 100, and the projections of the card slots 210 on the assembly surface 201 are all in arc-shaped strips and all extend along the circumferential direction of the nut 100. In this embodiment, since the catch 130 rotates along the circumferential direction of the nut 100 so that the anti-falling portion 132 of the catch 130 is embedded in the anti-falling groove portion 212 of the card slot 210, setting the catch 130 and the card slot 210 to have arc-shaped projections can adapt to the rotation path of the catch 130, making the anti-falling portion 132 of the catch 130 and the anti-falling groove portion 212 of the card slot 210 more matched in shape, more fitting with each other, and having a better clamping effect on the catch 130.
[0054] Specifically, the projections of the anti-rotation portion 131 and the anti-falling portion 132 of the catch 130 on the flange connection surface 121 are both in arc-shaped strips and both extend along the circumferential direction of the nut 100, and the projections of the anti-rotation groove portion 211 and the anti-falling groove portion 212 of the card slot 210 on the assembly surface 201 are both in arc-shaped strips and both extend along the circumferential direction of the nut 100. The central angle α corresponding to the anti-rotation portion 131 and the central angle β corresponding to the anti-falling portion 132 in each catch 130 can both be 10 degrees, and the central angles corresponding to the anti-rotation portion 131 and the anti-falling portion 132 can also be other values. The central angles corresponding to the anti-rotation portion 131 and the anti-falling portion 132 in each catch 130 can be the same or different.
[0055] Refer to again Figures 1 to 6 , to ensure that the whole catch 130 can be axially embedded into the anti-rotation groove portion 211 of the card slot 210 along the nut 100, the dimension of the anti-rotation groove portion 211 along the circumferential direction of the nut 100 should be equal to or greater than the dimension of the catch 130 along the circumferential direction of the nut 100. During actual assembly, the dimension of the anti-rotation groove portion 211 along the circumferential direction of the nut 100 can be slightly greater than the dimension of the catch 130 along the circumferential direction of the nut 100, so that the whole catch 130 can be more easily embedded into the anti-rotation groove portion 211 of the card slot 210. For example, when the central angle corresponding to the whole catch 130 is 20 degrees, the central angle of the anti-rotation groove portion 211 of the card slot 210 can be 22 - 25 degrees, specifically 22 degrees, 23 degrees, 24 degrees or 25 degrees.
[0056] To enable the anti-falling portion 132 to be completely embedded into the anti-falling groove portion 212 along the circumferential direction of the nut 100, the dimension of the anti-falling groove portion 212 along the circumferential direction of the nut 100 can be equal to or greater than the dimension of the anti-falling portion 132 along the circumferential direction of the nut 100. During actual assembly, the dimension of the falling groove portion along the circumferential direction of the nut 100 can be slightly greater than the dimension of the anti-falling portion 132 along the circumferential direction of the nut 100. For example, when the central angle of the anti-falling portion 132 of the catch 130 is 10 degrees, the central angle of the anti-falling groove portion 212 of the card slot 210 can be 12 - 13 degrees, specifically 12 degrees or 13 degrees.
[0057] To enable the anti - dropping portion 132 to be circumferentially embedded into the anti - dropping groove portion 212 along the circumference of the nut 100, the dimension of the anti - dropping groove portion 212 along the axial direction of the nut 100 should also be equal to or greater than the dimension of the anti - dropping portion 132 along the axial direction of the nut 100.
[0058] To ensure that the anti - dropping portion 132 can be embedded into the anti - dropping groove portion 212, the height difference between the anti - rotation groove portion 211 and the anti - dropping groove portion 212 along the axial direction of the nut 100 is equal to or less than the height difference between the anti - rotation portion 131 and the anti - dropping portion 132 along the axial direction of the nut 100.
[0059] Furthermore, to make the hook 130 and the slot 210 fit better and increase the clamping effect of the hook 130 in the slot 210, the dimensions of the hook 130 and the slot 210 along the axial direction of the nut 100 are the same, and the dimensions of the anti - rotation portion 131 and the anti - rotation groove portion 211 along the axial direction of the nut 100 are the same. It can also make the flange connection surface 121 fit with the assembly surface 201 after the hook 130 and the slot 210 are fully engaged, and the anti - slip and fastening effects between the nut 100 and the mating part 200 are better. For example, the overall dimension of the hook 130 along the axial direction of the nut 100 is 2 mm, that is, the dimension of the anti - rotation portion 131 of the hook 130 along the axial direction of the nut 100 is 2 mm (the tolerance can be - 0.2 mm), the dimension of the anti - dropping portion 132 of the hook 130 along the axial direction of the nut 100 is 1 mm (the tolerance can be - 0.1 mm), the overall dimension of the slot 210 along the axial direction of the nut 100 is 2 mm, that is, the dimension of the anti - rotation groove portion 211 of the slot 210 along the axial direction of the nut 100 is 2 mm (the tolerance can be + 0.2 mm), and the dimension of the anti - dropping groove portion 212 of the slot 210 along the axial direction of the nut 100 is 1 mm (the tolerance can be + 0.1 mm).
[0060] In this application, the hook 130 and the slot 210 are matched in shape, and the internal dimension of the slot 210 is set according to the dimension of the hook 130 to ensure the fitting accuracy. If the internal dimension of the slot 210 is too large, the hook 130 cannot be clamped, that is, the nut 100 cannot be clamped. If the internal dimension of the slot 210 is too narrow, the nut 100 cannot be screwed in.
[0061] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application 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 this application.
[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0063] In this application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0064] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0065] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0066] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.
Claims
1. A nut anti-rotation structure, characterized in that It includes a nut and a mating part; The nut includes a nut body and a flange fixed to the end face of the nut body. The flange has a flange connection surface facing away from the nut body, and the mating part has an assembly surface that can face the flange connection surface; One of the flange connection surface and the assembly surface is provided with a hook, and the other is provided with a slot. The hook includes an anti-rotation part and an anti-falling part. The anti-rotation part and the anti-falling part intersect to form an angle. The slot includes an anti-rotation slot part and an anti-falling slot part. The anti-rotation slot part and the anti-falling slot part also intersect to form an angle; The hook and the slot are configured such that the hook is axially inserted into the anti-rotation slot part along the nut to limit the circumferential movement of the nut relative to the mating part along the circumference of the nut, and the hook moves circumferentially along the nut until the anti-falling part is inserted into the anti-falling slot part to limit the axial movement of the nut relative to the mating part away from the mating part along the axis of the nut.
2. The anti-rotation structure of the nut according to claim 1, characterized in that, The anti-rotation part is parallel to the axis of the nut, and the anti-falling part extends circumferentially along the nut; Correspondingly, the anti-rotation slot part is parallel to the axis of the nut, and the anti-falling slot part extends circumferentially along the nut.
3. The nut anti-rotation structure according to claim 2, characterized in that, The anti-falling part is perpendicular to the axis of the nut, or the anti-falling part extends spirally along the axis of the nut; Correspondingly, the anti-falling slot part is perpendicular to the axis of the nut, or the anti-falling slot part extends spirally along the axis of the nut.
4. The nut anti-rotation structure according to claim 2, wherein The projection of the hook on the flange connection surface is in the shape of an arc strip and extends circumferentially along the nut, and the projection of the slot on the assembly surface is also in the shape of an arc strip and extends circumferentially along the nut.
5. The anti-rotation structure of the nut according to claim 1, characterized in that, The circumferential dimension of the anti-rotation slot part along the nut is equal to or greater than the circumferential dimension of the hook along the nut; And / or, the circumferential dimension of the anti-falling slot part along the nut is equal to or greater than the circumferential dimension of the anti-falling part along the nut, and the axial dimension of the anti-falling slot part along the nut is equal to or greater than the axial dimension of the anti-falling part along the nut; And / or, the height difference between the anti-rotation slot part and the anti-falling slot part along the axis of the nut is equal to or less than the height difference between the anti-rotation part and the anti-falling part along the axis of the nut.
6. The nut anti-rotation structure according to claim 5, wherein, The hook and the slot have the same dimension along the axis of the nut, and the anti-rotation part and the anti-rotation slot part have the same dimension along the axis of the nut, so that the flange connection surface fits the assembly surface.
7. The anti-rotation structure of the nut according to claim 1, characterized in that, The hook is provided on the nut, and the slot is provided on the mating part.
8. The anti-rotation structure of the nut according to claim 7, characterized in that, The nut body, the flange and the hook are integrally formed.
9. The anti-rotation structure of the nut according to claim 7, wherein, The number of the hooks on the nut is multiple, and the multiple hooks are evenly arranged circumferentially along the nut; The number of the slots on the mating part is also multiple and corresponds to the number of the hooks, and the multiple hooks are evenly arranged circumferentially along the mating part.
10. The nut anti-rotation structure according to claim 4, characterized in that, The central angles subtended by the anti-rotation part and the anti-falling part in each hook are both 10 degrees, and the central angle subtended by the anti-falling slot part in each slot is 12 - 13 degrees.