CN223105007U - A nut assembly - Google Patents

Abstract

The application discloses a nut assembly which comprises a nut body and a gasket, wherein a clamping groove is formed in the lower end of the nut body in the axial direction, the gasket is conical and is axially and limitedly arranged in the clamping groove through a central through hole, and when the nut body is screwed and fastened with a bolt, the gasket axially abuts against the lower end face of the nut body through elastic deformation of changing cone angles. The nut has the beneficial effects that the gasket is arranged in a conical manner, after the bolt and the nut body are screwed, the gasket is axially acted on the bolt and the nut body by the restoring force generated after being extruded, so that the friction force between the bolt and the nut body is increased, and the nut body is not easy to loosen. Meanwhile, through the axial limit installation of the gasket and the nut body, the assembly process of the gasket and the nut body can be reduced, so that the installation efficiency is improved.

Description

Nut component

Technical Field

The application relates to the technical field of fasteners, in particular to a nut assembly.

Background

The principle of the nut is to utilize friction force generated by contact pressure of the screw pair to form self-locking so as to achieve the fastening effect. However, since there is a gap between the thread pairs, the contact pressure disappears when the threads are subjected to mechanical vibration, thereby generating a loosening phenomenon. In the prior art, a planar gasket is arranged between the bolts so as to increase the friction force between the nuts and the bolts, thereby achieving the technical effect of looseness prevention. However, the flat pad is complicated in manual operation during the assembly of the nut and the bolt, the nut hole and the flat pad hole are required to be aligned and then assembled, and the arrangement of the flat pad cannot completely meet the current anti-loosening requirement.

Disclosure of utility model

It is an object of the present application to provide a nut assembly that overcomes at least one of the above-mentioned drawbacks of the prior art.

In order to achieve at least one purpose, the nut component comprises a nut body and a gasket, wherein a clamping groove is formed in the lower end of the nut body in the axial direction, the gasket is conical and is axially and limitedly arranged in the clamping groove through a central through hole, and when the nut body and a bolt are screwed tightly, the gasket axially abuts against the lower end face of the nut body through elastic deformation of changing cone angles.

Preferably, the lower end of the nut body is provided with an annular connecting part, and the connecting part is matched with the lower end face of the nut body along the installation direction to form the clamping groove.

Preferably, the lower end of the nut body is provided with a plurality of connecting parts which are arranged at equal intervals along the circumferential direction, and the connecting parts are matched with the lower end face of the nut body along the installation direction to form the clamping groove.

Preferably, the upper end surface of the washer is suitable for being attached to the lower end surface of the nut body when in tightening.

Preferably, the upper end surface of the washer is matched with the lower end surface of the nut body through a friction structure.

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

Preferably, the nut assembly further comprises a base, an installation cavity is formed in one end, close to the nut body, of the base, the gasket is axially limited in the installation cavity, so that the nut body abuts against a fastened object through the base when being fastened, and the gasket is elastically deformed in the installation cavity.

Preferably, the base comprises a base body, the base body is close to the circumferential edge of the end face of the nut body and protrudes upwards to form a ring block, the upper end of the ring block extends radially towards the axis direction of the base body and is provided with a limiting block, and the limiting block is matched with the base body and the ring block to form the mounting cavity.

Preferably, the limiting block is annular.

Preferably, the limiting blocks are arranged in a plurality of ways and are arranged at equal intervals along the circumferential direction of the base body.

Compared with the prior art, the application has the beneficial effects that:

through carrying out the toper setting with the packing ring, screw down the back at bolt and nut body, the packing ring receives the restoring force axial action bolt and nut body that produces after the extrusion, can make the frictional force increase between bolt and the nut body, and then guarantees that the nut body is difficult for taking place not hard up. Meanwhile, through the axial limit installation of the gasket and the nut body, the assembly process of the gasket and the nut body can be reduced, so that the installation efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present application.

Fig. 2 is a schematic view of the present application in an exploded state.

Fig. 3 is a schematic cross-sectional view of the present application in an uninstalled state.

Fig. 4 is a schematic cross-sectional view of the present application in an installed state.

Fig. 5 is a schematic diagram of a cross-sectional structure of a base with an annular limiting block in the application.

In the figure, a nut body 1, a clamping groove 10, a connecting part 11, a gasket 2, a groove 20, a base 3, a mounting cavity 30, a limiting block 31, a base body 32 and a ring block 321 are arranged.

Detailed Description

The application will be further described with reference to the following detailed description, wherein it is noted that in the description of the present specification, descriptions of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that the particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.

In the description of the present application, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present application that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

One of the preferred embodiments of the present application, as shown in fig. 1 to 4, is a nut assembly including a nut body 1 and a washer 2. The lower extreme of nut body 1 along the axis direction is provided with draw-in groove 10, and packing ring 2 is the toper and through the perforation axial spacing installation in the draw-in groove 10 in the center. When the nut body 1 and the bolt are screwed tightly, the gasket 2 is axially propped against the lower end face of the nut body 1 through elastic deformation of changing the cone angle, and then the anti-loosening capacity is improved by increasing the positive pressure between the nut body 1 and the gasket 2.

It is known that when the conventional nut is used, the tightening and loosening of the nut mainly depends on the friction force between the nut and the gasket, and the gasket can increase the friction area through the contact with the fastened object to realize the anti-loosening. In this embodiment, the washer 2 is in a conical state in the initial state, and as the nut body 1 is tightened, the washer 2 is driven to elastically deform gradually from the conical state to the horizontal state by gradually approaching the distance between the nut body 1 and the fastened object, and as the elastic deformation of the washer 2 occurs, the washer 2 generates a pressing force on the lower end surface of the nut body 1 in the installation direction, and the pressing force can be overlapped with the reaction force applied to the nut body 1 by the fastened object to form a positive pressure, that is, the friction force required by the nut body 1 for loosening is increased, so that the loosening resistance of the nut body 1 can be effectively improved. Meanwhile, through axial limiting installation of the gasket 2 and the nut body 1, the nut body 1 and the gasket 2 can be guaranteed to form an assembly whole, and then the traditional assembly process can be reduced, so that the installation efficiency is improved.

In this embodiment, various specific implementations of the card slot 10 can be formed, and for convenience of understanding, the following will describe in detail by way of two specific examples.

As shown in fig. 2 to 4, a connecting part 11 with a ring shape is arranged at the lower end of the nut body 1, and the connecting part 11 is matched with the lower end surface of the nut body 1 along the installation direction to form a clamping groove 10.

In the second example, a plurality of connecting parts 11 are arranged at equal intervals along the circumferential direction at the lower end of the nut body 1, and the connecting parts 11 are matched with the lower end surface of the nut body 1 along the installation direction to form clamping grooves 10.

It should be appreciated that both of the above examples may satisfy the needs of the application, and may be specifically selected according to the actual needs of those skilled in the art. For the first example, the initial state of the connecting portion 11 may be a straight cylinder along the axial direction of the nut body 1, and after the washer 2 is sleeved on the outer side of the connecting portion 11, the end opening of the connecting portion 11 is expanded outwards to form a clamping groove 10 in cooperation with the lower end surface of the nut body 1, so as to realize the axial limitation of the washer 2. For the second example, the single connecting portion 11 may extend along the axial direction of the nut body 1 in the initial state, so that the washer 2 may 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 may be bent outwards to form the clamping groove 10 in cooperation with the lower end surface of the nut body 1, so as to realize the axial limitation of the washer 2.

It should be noted that, since the washer 2 is in a tapered configuration in its initial state, the outer surface of the connecting portion 11 may be provided as a conical table in order to reduce wear on the washer 2. Therefore, when the gasket 2 and the clamping groove 10 are in sleeve joint installation, the gasket 2 can be matched and attached with the outer surface of the connecting part 11 through the matching of the conical table surface of the connecting part 11 and the gasket 2.

In this embodiment, the washer 2 can generate an axial pressing force on the lower end surface of the nut body 1 as long as the washer 2 is elastically deformed. The degree of deformation of the gasket 2 can be selected by those skilled in the art according to actual conditions, and will be described in detail by way of specific examples for the sake of easy understanding.

Specifically, the initial taper angle of the gasket 2 may be set at 45 °, and then the taper angle of the gasket 2 may be increased to 75 ° for less loaded conditions. For the working condition of larger load, the cone angle of the gasket 2 can be increased to 90 degrees, namely the gasket 2 is in a horizontal state, at the moment, the upper end face of the gasket 2 can be attached to the lower end face of the nut body 1, when the nut body 1 is in tight connection, the gasket 2 and a fastened object can have the largest contact area, and meanwhile, the gasket 2 and the nut body 1 have the largest elastic restoring force. Of course, in order to ensure that the nut body 1 has a sufficient anti-loosening capability, the washer 2 may be pressed to a horizontal state for use under any load condition of the nut body 1.

In this embodiment, in order to further improve the anti-loosening capability of the nut body 1, the upper end surface of the washer 2 and the lower end surface of the nut body 1 may be engaged with each other by a friction structure. That is, when the washer 2 is in a horizontal state under the tight pressing of the nut body 1, the upper end surface of the washer 2 is attached to the lower end surface of the nut body 1, and the nut body 1 is further limited to rotate in the loosening direction by providing a friction structure.

It will be appreciated that the specific structure of the friction structure capable of achieving the above functions is various, for example, as shown in fig. 2, a plurality of grooves 20 may be provided on the upper end surface of the washer 2 at equal intervals along the circumferential direction, so that when the lower end surface of the nut body 1 is attached to the upper end surface of the washer 2, the lower end surface of the nut body 1 may generate micro deformation extending into the grooves 20 to improve the anti-loosening capability of the nut body 1 through extrusion deformation of the nut body 1. Of course, the groove 20 may be provided on the lower end surface of the nut body 1, or the groove 20 may be provided on both the lower end surface of the nut body 1 and the upper end surface of the washer 2.

In this embodiment, as shown in fig. 1 to 4, the nut assembly further includes a base 3, and an installation cavity 30 is provided on an end surface of the base 3, which is close to the bus bar body 1. The gasket 2 is limited in the mounting cavity 30, so that the nut body 1 is propped against a fastened object through the base 3 when being fastened, and the gasket 2 is elastically deformed in the mounting cavity 30.

It should be noted that if the washer 2 is directly contacted with the fastened object during the tightening, the washer 2 will slide along the surface of the fastened object through elastic deformation during the tightening of the nut body 1, and thus structural damage may be caused to the surface of the fastened object.

In the present embodiment, by providing the base 3, the deformation process of the gasket 2 can be performed in the base 3, so as to ensure that the surface of the fastened object is not damaged. And the base 3 can further increase the contact area with the fastened object to further improve the anti-loosening capability of the nut body 1. Meanwhile, through carrying out axial limiting connection between the base 3 and the gasket 2, assembly steps during integral installation of the nut component can be reduced, so that the installation efficiency is improved.

It should be noted that the central portion of the base 3 is provided with a through hole for the passage of a bolt, the diameter of which is smaller than the outer diameter of the washer 2, and the upper end opening of the installation cavity 30 is also smaller than the outer diameter of the washer 2, so that the washer 2 can be restrained within the installation cavity 30.

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 washer 2 and the bottom of the mounting cavity 30 may be provided with the same friction structure. In addition, the diameter of the installation cavity 30 is larger than the outer diameter of the washer 2, so that the washer 2 can be smoothly deformed into a horizontal state after being extruded by the nut body 1.

In the present embodiment, the specific structure of the base 3 capable of realizing the above functions is various, and for convenience of understanding, a specific description will be made below by one of the structures. As shown in fig. 2 to 4, the base 3 includes a base body 32, the peripheral edge of the end surface of the base body 32, which is close to the nut body 1, protrudes upward to form a ring block 321, the upper end of the ring block 321 extends radially toward the axial direction of the base body 32 to form a stopper 31, and the stopper 31, the base body 32 and the ring block 321 cooperate to form an installation cavity 30.

Specifically, there are various specific structural arrangements of the stoppers 31, for example, as shown in fig. 5, the stoppers 31 may be annular, and for example, as shown in fig. 1 and 2, the stoppers 31 are arranged in a plurality and equally spaced along the circumferential direction of the base body 32. Both examples can meet the needs of the application, and can be specifically selected according to actual needs. How the stopper 31 axially restricts the outside of the gasket 2 can be referred to as the above-described axial restriction of the inside of the gasket 2 by the connection portion 11, and will not be described in detail here.

The foregoing has outlined the basic principles, features, and advantages of the present application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.

Claims (10)

1. A nut assembly, comprising:

A nut body, a clamping groove arranged at the lower end of the nut body along the axial direction, and

The gasket is conical and is axially and limitedly arranged in the clamping groove through a central through hole;

When the nut body and the bolt are screwed tightly, the gasket axially abuts against the lower end face of the nut body through elastic deformation of changing the taper angle.

2. The nut assembly according to claim 1, wherein a lower end of the nut body is provided with a connecting portion having a ring shape, and the connecting portion cooperates with a lower end surface of the nut body in an installation direction to form the clamping groove.

3. The nut assembly according to claim 1, wherein the lower end of the nut body is provided with a plurality of connecting portions arranged at equal intervals in the circumferential direction, and the connecting portions are engaged with the lower end face of the nut body in the mounting direction to form the clamping grooves.

4. The nut assembly as defined in claim 1, being characterized in that an upper end surface of said washer is adapted to be in abutment with a lower end surface of said nut body upon tightening.

5. The nut assembly according to claim 4, wherein the washer has an upper end surface and a lower end surface that are engaged with each other by a friction structure.

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

7. The nut assembly according to any one of claims 1-6, further comprising a base, wherein a mounting cavity is provided at an end of the base adjacent to the nut body, and wherein the washer is axially confined within the mounting cavity such that the nut body is pressed against a fastened object by the base when tightened, whereby the washer is elastically deformed within the mounting cavity.

8. The nut assembly according to claim 7, wherein the base comprises a base body, a circumferential edge of the base body adjacent to the end face of the nut body protrudes upwards to form a ring block, a limiting block is arranged at the upper end of the ring block in a radial extending mode towards the axis direction of the base body, and the limiting block is matched with the base body and the ring block to form the mounting cavity.

9. The nut assembly as defined in claim 8, being characterized in that said stop is annular.

10. The nut assembly according to claim 8, wherein the stopper is provided in plurality and is provided at equal intervals along the circumferential direction of the base body.