CN217633393U

CN217633393U - Lock nut assembly and fastening mechanism

Info

Publication number: CN217633393U
Application number: CN202221242536.0U
Authority: CN
Inventors: 李鑫; 瞿元
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-10-21
Anticipated expiration: 2032-05-23

Abstract

The utility model discloses a lock nut assembly, including first nut and second nut, set up the little convex body of outside salient on the faying face of first nut, set up the recess that lets little convex body embedding on the faying face of second nut, the faying face of first nut contacts with the faying face of second nut. Through the two anti-loosening guarantees, the anti-loosening capacity of the nut is effectively improved. The utility model also discloses a fastening device.

Description

Lock nut assembly and fastening mechanism

Technical Field

The utility model belongs to the technical field of the fastener, specifically speaking, the utility model relates to a lock nut component and fastening device.

Background

The nut is one of the screw thread class connecting pieces that industry, life often used, and screw thread class connecting parts can rely on the relation realization auto-lock between lead angle and the equivalent friction angle of screw thread class mostly under the dead load operating mode, can say that, the pine phenomenon of taking off can not appear hardly under the dead load condition. However, in industry and life, a considerable number of machines are not static loads, for example, automobile engines, running trains and the like are interfered by vibration, impact and other factors during working, and early researches show that the pretightening force of the threaded connection is instantaneously reduced or even eliminated under the vibration and impact condition, and the phenomenon causes the friction force between the thread pairs to be instantaneously reduced or eliminated, so that the threaded connection is loosened, and the threaded connection is finally failed along with the increase of the vibration and impact times. For important machine equipment, failure of the connection will likely result in significant losses, so improving the reliability of the threaded connection is of course significant in improving product reliability.

The locking measure of traditional screw thread class part mainly has modes such as spring washer is locking, two nuts are locking, bonding is locking, wherein, the elastic deformation of spring washer is relied on in the spring washer is locking, increases the vice axial force of screw thread to increase the vice frictional resistance of screw thread and realize locking, this kind of locking mode only provides one locking guarantee, under abominable operating mode, the pine phenomenon can still appear in this kind of locking method. The double-nut locking is realized by means of mutual increase of axial force of two opposite nuts so as to increase the friction force of a thread pair and achieve the purpose of locking, but the double-nut is overlarge in size in the circumferential direction, the length of a selected bolt or a double-screw bolt in response is increased, and higher requirements are provided for installation space. The anti-loosening method is a one-off anti-loosening method, after the threaded connecting piece is screwed down, the bonding agent is coated on the joint surface of the thread pair to achieve the anti-loosening purpose, but the bonded threaded connecting piece is difficult to disassemble or even can not be disassembled, and the method is only suitable for the anti-loosening occasions without disassembling requirements.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a lock nut component, the purpose improves locking effect.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the locking nut assembly comprises a first nut and a second nut, wherein a bonding surface of the first nut is provided with a micro-convex body protruding outwards, a bonding surface of the second nut is provided with a groove for embedding the micro-convex body, and the bonding surface of the first nut is in contact with the bonding surface of the second nut.

The number of the micro-convex bodies is more than that of the grooves.

The micro-convex bodies are uniformly distributed on the joint surface of the first nut along the circumferential direction.

The microprotrusions are of a hemispherical structure.

The micro convex body and the first nut are integrally formed.

The utility model also provides a fastening device, include the lock nut subassembly.

The utility model discloses a lock nut component: the common nut is made into a split type, the upper nut and the lower nut can generate a butt effect in the installation process, a double-nut interlocking effect is achieved, a first anti-loosening guarantee is formed, and meanwhile, the common nut only occupies the thickness of one common nut and does not influence the installation space; the micro-convex bodies and the grooves at the joint surfaces of the upper and lower nuts can be matched to prevent the two nuts from sliding relative to each other in the circumferential direction, and a second anti-loosening guarantee can be formed. Through twice locking guarantee, effectively promote the locking ability of nut.

Drawings

FIG. 1 is a cross-sectional view of a fastening mechanism;

FIG. 2 is a schematic structural view of a first nut;

FIG. 3 is a schematic structural view of a second nut;

the labels in the above figures are: 1. a first nut; 2. a second nut; 3. a microprotrusion body; 4. a groove; 5. A flat washer; 6. a first connected member; 7. a second connected member; 8. and (4) bolts.

Detailed Description

The following detailed description of the embodiments of the present invention is provided to help those skilled in the art to more fully, accurately and deeply understand the conception and the technical solution of the present invention, and to help them implement the same, by referring to the accompanying drawings and the description of the embodiments.

As shown in fig. 1 to 3, the utility model provides a lock nut assembly, including first nut 1 and second nut 2, set up the little convex body 3 of outside salient on the faying face of first nut 1, set up the recess 4 that lets little convex body 3 embedding on the faying face of second nut 2, the faying face of first nut 1 contacts with the faying face of second nut 2.

Specifically speaking, as shown in fig. 1 to fig. 3, the utility model discloses a lock nut component mainly includes two split type nuts, first nut 1 and second nut 2 and 8 threaded connection of bolt, at a plurality of little convex bodies 3 of the faying face distribution of first nut 1, at a plurality of recesses 4 of the faying face distribution of second nut 2, the faying face of first nut 1 is the one end terminal surface of first nut 1, the faying face of second nut 2 is the one end terminal surface of second nut 2, little convex body 3 and recess 4 can form the cooperation.

Preferably, as shown in fig. 2 and 3, the asperities 3 are provided in plural numbers, and the number of grooves 4 is greater than the number of asperities 3. All the micro-protrusions 3 are uniformly distributed on the joint surface of the first nut 1 along the circumferential direction by taking the axis of the first nut 1 as a center line, and all the grooves 4 are uniformly distributed on the joint surface of the second nut 2 along the circumferential direction by taking the axis of the second nut 2 as a center line.

As shown in fig. 2 and 3, in the present embodiment, the number of the microprotrusions 3 is four and the number of the grooves 4 is twelve. The micro-convex body 3 is of a hemispherical structure, and the shape and the size of the groove 4 are the same as those of the micro-convex body 3, so that the groove can be matched with the micro-convex body 3.

Preferably, the microprotrusions 3 are integrally formed with the first nut 1. Or the micro convex body 3 is manufactured separately and is installed with the first nut 1 into a whole after the manufacturing is finished.

The utility model also provides a fastening device, including the lock nut subassembly of above-mentioned structure. The specific structure of the lock nut assembly can refer to fig. 1 to 3, and is not described herein again. Since the fastening mechanism of the present invention includes the lock nut assembly in the above embodiment, it has all the advantages of the above lock nut assembly.

As shown in fig. 1, the fastening mechanism is used for fastening the first connected member 6 and the second connected member 7, the fastening mechanism further comprises a bolt 8 and a flat washer 5, the bolt 8 is in threaded connection with the first nut 1 and the second nut 2 after sequentially passing through the first connected member 6, the second connected member 7 and the flat washer 5, and the first nut 1 is sandwiched between the flat washer 5 and the second nut 2.

During installation, the first nut 1 is screwed firstly, the second nut 2 is screwed, when the joint surfaces of the first nut 1 and the second nut 2 are in form contact, the second nut 2 is screwed for a plurality of circles, so that the first nut 1 and the second nut 2 are mutually extruded on the joint surfaces, and after the micro-convex bodies 3 and the grooves 4 are matched, the second nut 2 can be screwed in a pause manner, and the nut is screwed at the moment.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.

Claims

1. Lock nut subassembly, its characterized in that: the nut comprises a first nut and a second nut, wherein a bonding surface of the first nut is provided with a micro-convex body protruding outwards, a bonding surface of the second nut is provided with a groove for the micro-convex body to be embedded into, and the bonding surface of the first nut is contacted with the bonding surface of the second nut.

2. The cage nut assembly of claim 1 wherein: the number of the micro-convex bodies is more than that of the grooves.

3. The cage nut assembly of claim 2 wherein: the micro-convex bodies are uniformly distributed on the joint surface of the first nut along the circumferential direction.

4. The lock nut assembly according to any one of claims 1 to 3 wherein: the microprotrusions are of a hemispherical structure.

5. The lock nut assembly according to any one of claims 1 to 3 wherein: the micro convex body and the first nut are integrally formed.

6. Fastening device, its characterized in that: comprising the lock nut assembly according to any one of claims 1 to 5.