CN109681511B

CN109681511B - Differential ratchet type anti-loose double nut

Info

Publication number: CN109681511B
Application number: CN201910120956.8A
Authority: CN
Inventors: 杨天啸
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-19
Filing date: 2019-02-19
Publication date: 2021-05-04
Anticipated expiration: 2039-02-19
Also published as: CN109681511A

Abstract

The invention discloses a differential ratchet type anti-loose double nut which comprises an upper nut and a lower nut, wherein both the upper nut and the lower nut are provided with ratchets, the teeth numbers of the ratchets of the upper nut and the lower nut are different, and a group of ratchets are meshed when the upper nut and the lower nut rotate relatively for a small angle, so that the relative looseness between the double nuts is effectively prevented, and the defect that the traditional double nut is only anti-loose by friction force is overcome.

Description

Differential ratchet type anti-loose double nut

Technical Field

The invention relates to a locknut, in particular to an improved double nut.

Background

The nut is widely applied, the anti-loosening technology is required to be adopted in some vibration or important occasions, the double-nut anti-loosening technology is widely applied, but in some more important or vibration-intensive occasions, the common double-nut still cannot achieve the satisfactory anti-loosening effect. In the prior art, a plurality of improved double nuts technologies are provided, such as double nuts with eccentric sleeves and double nuts with tightening structures, the principle of the double nuts is basically that the double nuts are loosened by increasing friction force, although the loosening prevention effect is increased, the relative rotation between the double nuts cannot be prevented, and the double nuts have the defects of complex structure, difficult processing, higher precision requirement on matched screws and the like.

Disclosure of Invention

The invention aims to provide a differential ratchet type anti-loosening double nut, which adopts a ratchet structure to effectively prevent the double nuts from rotating reversely relative to each other and greatly improve the anti-loosening effect of the double nuts.

In order to achieve the purpose, the technical scheme of the invention is as follows: the differential ratchet type double-locking nut comprises an upper nut and a lower nut, wherein ratchets are arranged on the upper nut and the lower nut, and the number of the ratchets of the upper nut and the lower nut is different. Every time the upper nut and the lower nut rotate relatively by a small angle, a group of ratchets are meshed, so that the relative looseness between the double nuts is effectively prevented, and the defect that the traditional double nuts are only loose-proof by friction force is overcome. The ratchets of the upper nut and the lower nut are arranged on the end surface or the circumferential surface or the conical surface of the nut; the ratchet position of the upper nut or the lower nut and the thread of the nut can be concentric or eccentric; the number of teeth, the tooth shape, the tooth width and the tooth height of the ratchets of the upper nut and the lower nut can be selected to be reasonable according to the size, the strength, the installation and use requirements and the like of the nuts. During the installation, screw up the lower nut earlier, screw up the nut again, go up the nut and screw up the later stage, have a set of ratchet and begin the atress and lead to the fact the resistance to screwing up the nut, further increase and screw up moment, because the existence of nut and bolt elastic deformation, will have a set of ratchet to cross and mesh, every rotatory a specific angle, just will have another set of ratchet to cross and mesh, until reaching the fastening moment of settlement. Because of the function of the ratchet structure, the upper nut is difficult to retract after being screwed, and the upper nut and the lower nut are combined together after being screwed in the vibration process, thereby achieving a durable anti-loosening effect. When the upper nut and the lower nut are disassembled at the same time, the upper nut can be disassembled at first, and the upper nut drives the lower nut to rotate together through the ratchet.

The invention has the beneficial effects that:

1. the differential ratchet type anti-loosening double nut adopts the ratchet structure, can effectively prevent the double nuts from reversely rotating, overcomes the defect that the traditional double nut only relies on friction force to prevent loosening, and greatly improves the anti-loosening effect of the double nut.

2. According to the differential ratchet type double-locking nut, the number of the ratchets of the upper nut and the lower nut is different, which is equivalent to that the indexing number of the ratchets is increased, and the meshing of a group of ratchets of the upper nut and the lower nut can be realized every time the upper nut rotates for a small angle.

3. According to the differential ratchet type double-nut anti-loosening device, the number of the ratchets of the upper nut and the lower nut is different, all the ratchets are stressed alternately in the installation process, and the installation process is relatively simple.

Drawings

FIG. 1 is a schematic view of an upper nut and a lower nut of embodiment 1;

FIG. 2 is a schematic view of an upper nut and a lower nut of embodiment 2;

FIG. 3 is a schematic view of an upper nut and a lower nut of embodiment 3;

referring to fig. 1: 1-upper nut, 2-lower nut, 3-ratchet.

Detailed Description

Example 1:

as shown in fig. 1, taking M30 nut as an example, the upper nut is provided with 7 ratchets, the lower nut is provided with 8 ratchets, the ratchets are arranged on the end surface of the nut, the ratchets of the upper nut are arranged on the lower end surface, the ratchets of the lower nut are arranged on the upper end surface, the position occupied by each ratchet in the circumferential direction is less than one fiftieth of circumference, the tooth height is about 1mm, the tooth width is about 3mm, the tooth top has a round angle, and the ratchets of the upper and lower nuts are easy to screw and difficult to unscrew. During the installation, screw up the lower nut earlier, screw up the nut again, when last nut and lower nut terminal surface contact, have a set of ratchet and begin the atress and to the resistance of screwing up the nut, further increase the tightening torque, because the existence of nut and bolt elastic deformation, this a set of ratchet can cross each other and mesh, and every one fiftieth circumference of rotation will have another set of ratchet to cross and mesh, until reaching the fastening torque of settlement. Because of the function of the ratchet structure, the upper nut is difficult to retract after being screwed, and the upper nut and the lower nut are combined together after being stopped in the vibration process, thereby achieving a durable anti-loosening effect.

Example 2:

as shown in fig. 2, the ratchet teeth of the upper and lower nuts are provided on the circumferential surface of the nut, as in embodiment 1. The ratchet teeth of the embodiment are arranged on the circumferential surface of the nut, the ratchet teeth are not influenced by large extrusion force between two nuts, the mutual crossing and meshing of the ratchet teeth are realized by the radial elastic deformation of the nuts during the installation, the defect that the ratchet teeth are easily extruded and damaged during the installation in the embodiment 1 is overcome, and the defect that the manufacturing difficulty is higher than that in the embodiment 1.

Example 3:

as shown in fig. 3, the ratchet teeth of the upper and lower nuts are provided on the conical surface of the nut, as in embodiment 1. The ratchet teeth of the embodiment are arranged on the conical surface of the nut, and the radial direction and the axial direction of the nut can simultaneously and elastically deform to realize the mutual crossing and meshing of the ratchet teeth when the nut is installed, thereby taking the advantages and the disadvantages of the embodiment 1 and the embodiment 2 into consideration.

The above description is only an exemplary embodiment of the present invention, and should not be taken as limiting the scope of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention.

The upper nut and the lower nut are not particularly limited to nuts which are arranged up and down, and the description is convenient.

Claims

1. The differential ratchet type double-locking nut is composed of an upper nut and a lower nut, and is characterized in that: the upper nut and the lower nut are both provided with a plurality of rigid ratchets, the ratchets are distributed annularly to form a ratchet ring, and the number of the ratchets contained in the ratchet ring of the upper nut and the ratchet ring of the lower nut are mutually prime.

2. The differential ratchet type double locknut of claim 1 wherein: the ratchets of the upper nut and the lower nut are arranged on the end surface.

3. The differential ratchet type double locknut of claim 1 wherein: the ratchets of the upper nut and the lower nut are arranged on the circumferential surface.

4. The differential ratchet type double locknut of claim 1 wherein: the ratchets of the upper nut and the lower nut are arranged on the conical surface.

5. The differential ratchet type double locknut of claim 1 wherein: the ratchet positions of the upper nut and the lower nut are concentric with the threads of the nuts.

6. The differential ratchet type double locknut of claim 1 wherein: the ratchet position of the upper nut or the lower nut is not concentric with the thread of the nut.