Nut assembly

Abstract

The utility model discloses a nut assembly. The nut assembly comprises a nut body and a gasket. A clamping groove is formed in the lower end of the nut body in the axis direction, and the gasket is conical and axially installed in the clamping groove in a limited mode through a center penetrating hole. When the nut body and the bolt are screwed and tightened, the gasket axially abuts against the lower end face of the nut body through elastic deformation of changing the taper angle. The nut has the beneficial effects that the gasket is arranged in the conical shape, after the bolt and the nut body are tightened, reset force generated after the gasket is extruded acts on the bolt and the nut body in the axial direction, the friction force between the bolt and the nut body can be increased, and then it is guaranteed that the nut body is not prone to loosening. And meanwhile, the gasket and the nut body are mounted in an axial limiting manner, so that the assembling process of the gasket and the nut body can be reduced, and the mounting efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of fasteners, and particularly to a nut assembly. Background Art

[0002] The principle of a nut is to utilize the frictional force generated by the contact pressure of the thread pair to form self-locking to achieve the fastening effect. However, due to the gap between the thread pairs, when the thread is subjected to mechanical vibration, the contact pressure will disappear, resulting in loosening. In the prior art, a flat gasket is provided between the bolt and the nut to increase the frictional force between the nut and the bolt, thereby achieving the technical effect of anti-loosening. However, the manual operation of the flat gasket during the assembly of the nut and the bolt is relatively cumbersome. It is necessary to align the nut hole and the flat gasket hole before assembly, and the setting of the flat gasket cannot fully meet the current anti-loosening requirements. Utility Model Content

[0003] One of the purposes of this application is to provide a nut assembly that can solve at least one of the defects in the above background art.

[0004] To achieve at least one of the above purposes, the technical solution adopted in this application is: a nut assembly, including a nut body and a washer; a card slot is provided at the lower end of the nut body along the axial direction, the washer is conical and axially limited and installed in the card slot through a central through hole; when the nut body is screwed and tightened with a bolt, the washer axially abuts against the lower end surface of the nut body by undergoing an elastic deformation that changes the cone angle.

[0005] Preferably, a ring-shaped connecting portion is provided at the lower end of the nut body, and the connecting portion and the lower end surface of the nut body along the installation direction cooperate to form the card slot.

[0006] Preferably, a plurality of connecting portions are provided at the lower end of the nut body at equal intervals in the circumferential direction, and the connecting portions and the lower end surface of the nut body along the installation direction cooperate to form the card slot.

[0007] Preferably, the upper end surface of the washer is adapted to be attached to the lower end surface of the nut body during tightening.

[0008] Preferably, the upper end surface of the washer and the lower end surface of the nut body are cooperated through a friction structure.

[0009] Preferably, a plurality of grooves for forming the friction structure are provided at equal intervals in the circumferential direction on the upper end surface of the washer and / or the lower end surface of the nut body.

[0010] Preferably, the nut assembly further includes a base. An installation cavity is provided at one end of the base close to the nut body. The washer is axially limited in the installation cavity, so that when the nut body is tightened, it abuts against the object to be fastened through the base, and then the washer undergoes elastic deformation in the installation cavity.

[0011] Preferably, the base includes a base body. A circumferential edge of the end face of the base body close to the nut body protrudes upward to form a ring block. An upper end of the ring block extends radially toward the axis of the base body to be provided with a limiting block. The limiting block, the base body and the ring block cooperate to form the installation cavity.

[0012] Preferably, the limiting block is annular.

[0013] Preferably, there are a plurality of the limiting blocks, and they are arranged at equal intervals along the circumferential direction of the base body.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows:

[0015] By arranging the washer in a conical shape, after the bolt and the nut body are tightened, the restoring force generated after the washer is extruded acts axially on the bolt and the nut body, which can increase the friction force between the bolt and the nut body, and thus ensure that the nut body is not easily loosened. At the same time, by axially limiting and installing the washer and the nut body, the assembly process of the washer and the nut body can be reduced to improve the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present application.

[0017] Figure 2 is a schematic diagram of the disassembled state of the present application.

[0018] Figure 3 is a schematic cross-sectional structure diagram of the present application in an uninstalled state.

[0019] Figure 4 is a schematic cross-sectional structure diagram of the present application in an installed state.

[0020] Figure 5 is a schematic cross-sectional structure diagram of the base with an annular limiting block in the present application.

[0021] In the figure: nut body 1, card slot 10, connecting portion 11, washer 2, groove 20, base 3, installation cavity 30, limiting block 31, base body 32, ring block 321. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, in combination with specific embodiments, the present application will be further described. It should be noted that in the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 the present application. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring 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, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0023] In the description of the present application, it should be noted that for the orientation terms, if there are terms such as "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present 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 should not be construed as limiting the specific protection scope of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence.

[0025] In the present application, unless otherwise clearly defined and limited, terms such as "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0026] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may also include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0027] The terms "comprise" and "have" and any variations thereof in the description and claims of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0028] One preferred embodiment of this application, as Figures 1 to 4 shown, a nut assembly includes a nut body 1 and a washer 2. A clamping groove 10 is provided at the lower end of the nut body 1 along the axial direction. The washer 2 is conical and is axially limited and installed in the clamping groove 10 through a central through hole. When the nut body 1 is screwed and tightened with a bolt, the washer 2 axially abuts against the lower end face of the nut body 1 through elastic deformation of changing the cone angle, thereby increasing the normal pressure between the nut body 1 and the washer 2 to improve the anti-loosening ability.

[0029] It should be noted that when a traditional nut is in use, the tightening and loosening of the nut mainly rely on the friction force between the nut and the gasket. The gasket can increase the friction area through contact with the object to be fastened to achieve anti-loosening. In this embodiment, the washer 2 is in a conical state in the initial state. As the nut body 1 is tightened, the distance between the nut body 1 and the object to be fastened gradually approaches, which will drive the washer 2 to gradually elastically deform from the conical state to a horizontal state. As the elastic deformation of the washer 2 occurs, the washer 2 will generate a squeezing force on the lower end face of the nut body 1 along the installation direction. This squeezing force can be superimposed with the reaction force exerted on the nut body 1 by the object to be fastened to form a normal pressure, that is, the friction force required for the nut body 1 to prevent loosening increases, thereby effectively improving the anti-loosening ability of the nut body 1. At the same time, by axially limiting and installing the washer 2 and the nut body 1, it can ensure that an assembled whole is formed between the nut body 1 and the washer 2, and thus the traditional assembly process can be reduced to improve the installation efficiency.

[0030] In this embodiment, there are multiple specific implementation manners capable of forming the card slot 10. For the convenience of understanding, the following will be described in detail through two specific examples.

[0031] Example 1: As Figures 2 to 4 shown, a ring-shaped connecting portion 11 is provided at the lower end of the nut body 1, and the connecting portion 11 cooperates with the lower end surface of the nut body 1 in the installation direction to form the card slot 10.

[0032] Example 2: A plurality of connecting portions 11 are provided at the lower end of the nut body 1 and are arranged at equal intervals in the circumferential direction. The connecting portion 11 cooperates with the lower end surface of the nut body 1 in the installation direction to form the card slot 10.

[0033] It should be known that the above two examples can both meet the requirements of this application, and can be specifically selected according to the actual needs of those skilled in the art. For the above Example 1, the initial state of the connecting portion 11 can be a straight cylindrical shape along the axial direction of the nut body 1. After the washer 2 is sleeved outside the connecting portion 11, the port of the connecting portion 11 is expanded and extended outwards to cooperate with the lower end surface of the nut body 1 to form the card slot 10 to realize the axial limit of the washer 2. For the above Example 2, a single connecting portion 11 can be extended along the axial direction of the nut body 1 in the initial state, so that the washer 2 can smoothly pass through the annular structure formed by the plurality of connecting portions 11 through the central through hole, and then the connecting portion 11 is bent outwards to cooperate with the lower end surface of the nut body 1 to form the card slot 10 to realize the axial limit of the washer 2.

[0034] It should be known that since the initial state of the washer 2 is a conical structure, in order to reduce the wear of the washer 2, the outer surface of the connecting portion 11 can be set as a conical table surface. In this way, when the washer 2 is sleeved and installed with the card slot 10, through the cooperation of the conical table surface of the connecting portion 11 and the washer 2, it can be ensured that the washer 2 can be adapted and fitted to the outer surface of the connecting portion 11.

[0035] In this embodiment, as long as the washer 2 undergoes elastic deformation, the washer 2 can generate an axial extrusion force on the lower end surface of the nut body 1. Therefore, those skilled in the art can select the deformation degree of the washer 2 according to the actual working conditions. For the convenience of understanding, the following can be described in detail through specific examples.

[0036] Specifically, the initial taper angle of the washer 2 can be set to 45°. Then, for working conditions with a relatively small load, the taper angle of the washer 2 can be increased to 75°. For working conditions with a relatively large load, the taper angle of the washer 2 can be increased to 90°, that is, the washer 2 is in a horizontal state. At this time, the upper end surface of the washer 2 can be in contact with the lower end surface of the nut body 1. When the nut body 1 is tightened, the washer 2 and the object to be fastened can have the largest contact area, and at the same time, there is the largest elastic restoring force between the washer 2 and the nut body 1. Of course, to ensure that the nut body 1 has sufficient anti-loosening ability, the washer 2 can be pressed to the horizontal state for use under any load condition of the nut body 1.

[0037] In this embodiment, to further improve the anti-loosening ability of the nut body 1, the upper end surface of the washer 2 and the lower end surface of the nut body 1 can be matched through a friction structure. That is, when the washer 2 is in a horizontal state under the tightening extrusion of the nut body 1, while the upper end surface of the washer 2 is in contact with the lower end surface of the nut body 1, a friction structure can also be set to further limit the rotational tendency of the nut body 1 in the loosening direction.

[0038] It can be understood that there are various specific structures of the friction structure that can achieve the above functions. For example Figure 2 As shown, a plurality of grooves 20 can be provided at equal intervals in the circumferential direction on the upper end surface of the washer 2. When the lower end surface of the nut body 1 is in contact with the upper end surface of the washer 2, through the extrusion deformation of the nut body 1, the lower end surface of the nut body 1 can produce a small deformation extending into the grooves 20 to improve the anti-loosening ability of the nut body 1. Of course, the grooves 20 can also be provided on the lower end surface of the nut body 1, or grooves 20 can be provided on both the lower end surface of the nut body 1 and the upper end surface of the washer 2.

[0039] In this embodiment, as Figures 1 to 4 shown, the nut assembly further includes a base 3, and an installation cavity 30 is provided on the end surface of the base 3 close to the bus body 1. The washer 2 is limited in the installation cavity 30, so that when the nut body 1 is tightened, it abuts against the object to be fastened through the base 3, and then the washer 2 undergoes elastic deformation in the installation cavity 30.

[0040] It should be known that if the washer 2 is directly in contact with the object to be fastened during the tightening process, then during the tightening process of the nut body 1, the washer 2 will slide along the surface of the object to be fastened through elastic deformation, which may cause structural damage to the surface of the object to be fastened.

[0041] In this embodiment, by providing the base 3, the deformation process of the washer 2 can occur within the base 3 to ensure that the surface of the object to be fastened is not damaged. Moreover, the base 3 can further increase the contact area with the object to be fastened to further improve the anti-loosening ability of the nut body 1. At the same time, by axially limiting and connecting the base 3 and the washer 2, the assembly steps during the overall installation of the nut assembly can be reduced to improve the installation efficiency.

[0042] It should be noted that a through hole for the bolt to pass through is provided in the middle of the base 3, and the diameter of this through hole is smaller than the outer diameter of the washer 2; at the same time, the upper opening of the installation cavity 30 is also smaller than the outer diameter of the washer 2, so that the washer 2 can be restricted within the installation cavity 30.

[0043] It should also be noted that in order to ensure the stability of the friction structure between the washer 2 and the nut body 1, the same friction structure can also be provided at the bottom of the washer 2 and the installation cavity 30. And, the diameter size of the installation cavity 30 is larger than the outer diameter of the washer 2, so that it can be ensured that the washer 2 is smoothly deformed into a horizontal state after being extruded by the nut body 1.

[0044] In this embodiment, there are various specific structures of the base 3 that can achieve the above functions. For the convenience of understanding, one of the structures will be specifically described below. As Figures 2 to 4 shown, the base 3 includes a base body 32. The circumferential edge of the end face of the base body 32 close to the nut body 1 bulges upward to form an annular block 321. A limiting block 31 extends radially in the direction of the axis of the base body 32 at the upper end of the annular block 321. The limiting block 31, the base body 32, and the annular block 321 cooperate to form an installation cavity 30.

[0045] Specifically, there are also various specific structural settings for the limiting block 31; for example Figure 5 shown, the limiting block 31 can be annular; for another example Figure 1 and Figure 2 shown, the number of the limiting blocks 31 is multiple and they are arranged at equal intervals along the circumferential direction of the base body 32. Both of these examples can meet the requirements of this application, and can be specifically selected according to actual needs. Regarding how the limiting block 31 axially limits the outer side of the washer 2, reference can be made to the axial limitation of the inner side of the washer 2 by the connecting portion 11 above, so it will not be elaborated in detail here.

[0046] The basic principle, main features and advantages of the present application have been described above. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements will occur to the present application, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A nut assembly, characterized in that, Comprising: A nut body; a clamping groove is provided at the lower end of the nut body along the axial direction; and A washer; the washer is conical and axially limited and installed in the clamping groove through a central through hole; When the nut body is screwed and tightened with a bolt, the washer axially abuts against the lower end face of the nut body by means of an elastic deformation that changes the cone angle.

2. The nut assembly according to claim 1, wherein A ring-shaped connecting portion is provided at the lower end of the nut body, and the connecting portion and the lower end face of the nut body along the installation direction cooperate to form the clamping groove.

3. The nut assembly according to claim 1, characterized in that, A plurality of connecting portions are provided at the lower end of the nut body at equal intervals in the circumferential direction, and the connecting portion and the lower end face of the nut body along the installation direction cooperate to form the clamping groove.

4. The nut assembly according to claim 1, wherein, The upper end face of the washer is adapted to fit against the lower end face of the nut body during tightening.

5. The nut assembly according to claim 4, wherein The upper end face of the washer and the lower end face of the nut body are cooperated through a friction structure.

6. The nut assembly according to claim 5, wherein, A plurality of grooves for forming the friction structure are provided at equal intervals in the circumferential direction on the upper end face of the washer and / or the lower end face of the nut body.

7. The nut assembly according to any one of claims 1-6, characterized in that, The nut assembly further includes a base, an installation cavity is provided at one end of the base close to the nut body, and the washer is axially limited in the installation cavity, so that the nut body abuts against the object to be fastened through the base during tightening, and further the washer undergoes elastic deformation in the installation cavity.

8. The nut assembly according to claim 7, characterized in that, The base includes a base body, a circumferential edge of an end face of the base body close to the nut body protrudes upward to form a ring block, a limiting block extends radially in the direction of the axis of the base body at the upper end of the ring block, and the limiting block, the base body and the ring block cooperate to form the installation cavity.

9. The nut assembly according to claim 8, wherein, The limiting block is annular.

10. The nut assembly according to claim 8, characterized in that, There are a plurality of the limiting blocks and they are arranged at equal intervals in the circumferential direction of the base body.

Images