CN113175472A

CN113175472A - Single-pad anti-loose bolt

Info

Publication number: CN113175472A
Application number: CN202110503692.1A
Authority: CN
Inventors: 吕贵刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-07-27

Abstract

The single-pad anti-loose bolt consists of a bolt body (1) with a groove, a main nut (2), an anti-loose washer (3) and a lock nut (4). The single-pad anti-loose bolt adjusts pre-tightening torque through the main nut (2) and self-locks according to friction force, and meanwhile, the anti-loose washer (3) forms a locking structure by utilizing the spiral backstop embedded in the spiral groove of the bolt with the groove (1) and the lock nut (4), so that the convex indentation teeth of the anti-loose washer (3) are slightly embedded into the surface of one end of the main nut (2), the resistance of relative movement between the anti-loose washer (3) and the main nut (2) is increased, and the main nut (2) is prevented from retreating. The pretightening force of the main nut (2) is kept, so that the anti-loosening purpose is achieved. The structure does not affect the fastening force, does not affect the anti-loosening effect, and is insensitive to the factors affecting bolt loosening, such as transverse vibration force, variable load, temperature change and the like.

Description

Single-pad anti-loose bolt

Technical Field

The invention relates to the technical field of bolt fastening, in particular to a single-pad anti-loose bolt.

Background

The bolt fastening mode has wide application in the industrial field and various use occasions, and because some bolt use occasions have higher requirements on bolt fastening, and the bolt can loosen or even fall off when being influenced by factors such as temperature, load change and the like, the bolt fastening in many use occasions has the anti-loosening function. In order to avoid the problems of looseness and failure of bolt connection in the working process, a plurality of methods are adopted by many people, and various bolt connection anti-loosening structures are designed, but the methods and the structural designs are not satisfactory in a plurality of use occasions at present, and need to be perfect.

Disclosure of Invention

The invention aims to provide a single-pad anti-loose bolt which has the advantages of good anti-loose effect, no maintenance, easy processing and low cost, so as to overcome the defects in the prior art and solve the problems of the prior anti-loose bolt.

The invention is realized by the following technical scheme:

the single-pad anti-loose bolt is composed of a bolt body (1) with a groove, a main nut (2), an anti-loose washer (3) and a locking nut (4).

The slotted bolt body (1) is provided with a spiral groove opposite to the screwing direction of the thread, the complementary angle of the spiral angle beta of the spiral groove is larger than the spiral angle lambda of the thread, and the spiral angle beta of the spiral groove is larger than 2 lambda.

The inner ring surface of the anti-loosening gasket (3) is provided with a spiral stopping piece, the spiral stopping central shaft of the inner ring surface of the anti-loosening gasket (3) is coaxial with the central shaft of the anti-loosening gasket (3), the spiral angle beta 1 of the spiral stopping piece of the anti-loosening gasket (3) is equal to the spiral angle beta of the spiral groove of the grooved bolt (1), the spiral directions of the spiral stopping piece and the spiral groove of the grooved bolt (1) are the same, and the spiral stopping piece of the anti-loosening gasket (3) is matched with the spiral groove of the grooved bolt (1).

One end of the anti-loose washer (3) is provided with convex indentation teeth, and the hardness of the tooth surface of the indentation teeth of the anti-loose washer (3) is greater than that of the end surface of the main nut (2).

One end of the main nut (2) is assembled opposite to one end of the anti-loose washer (3) with convex indentation teeth.

The advantages and effects are as follows:

the invention has the following advantages and beneficial effects:

1. the anti-loosening effect is good.

2. The installation, adjustment and disassembly are convenient; can be repeatedly used, and does not influence the fastening force nor the anti-loosening effect.

3. Easy processing and low cost.

Drawings

FIG. 1 is a schematic front view of the overall structure of a single-washer lockbolt;

FIG. 2 is a partial schematic view I of the front view of the overall structure of a single-pad anti-loose bolt

FIG. 3 is a schematic front view of a slotted bolt;

FIG. 4 is a schematic front view of a lock washer;

FIG. 5 is a sectional view of the lock washer taken along line A-A in a front view;

FIG. 6 is a partial schematic view II of a cross-sectional view of the lock washer A-A;

description of reference numerals:

1-a bolt body with a groove, 2-a main nut, 3-a lock washer, 4-a lock nut, 5-a fastened piece I and 6-a fastened piece II;

Detailed Description

The invention is further described below with reference to the accompanying drawings:

When the single-pad anti-loose bolt is assembled and used, the bolt body (1) with the groove penetrates through a fastened piece I (5) and a fastened piece II (6), then the main nut (2) is screwed in and screwed to a required working torque, one end of the convex indentation teeth of the anti-loose washer (3) is assembled opposite to one end of the main nut (2), at the moment, the spiral stop of the anti-loose washer (3) is embedded into the spiral groove of the bolt with the groove (1), the locknut (4) is screwed to a specified torque, the convex indentation teeth of the anti-loose washer (3) are slightly embedded into the surface of one end of the main nut (2), the whole fastening process is completed, and the assembly sequence of all parts is shown in figure 1.

When the fastened piece needs to be adjusted, the fastening program is executed reversely, the difference from the fastening process of a common bolt is small, and the single-pad anti-loosening bolt is convenient to mount, adjust and dismount and can be used repeatedly.

The single-pad anti-loose bolt adjusts pre-tightening torque through the main nut (2), the main nut (2) keeps friction force self-locking, the anti-loose washer (3) forms a locking structure by using a spiral stop embedded in a spiral groove of the bolt with a groove (1) and the locknut (4), and meanwhile, indentation teeth of the anti-loose washer (3) are enough to enable the surface of the main nut (2) to generate indentation under the action of the pre-tightening torque of the locknut (4), so that the protruding indentation teeth of the anti-loose washer (3) are slightly embedded in the surface of one end of the main nut (2), the resistance of relative movement between the anti-loose washer (3) and the main nut (2) is increased, and the main nut (2) is prevented from generating a retreating trend. The pretightening force of the main nut (2) is kept, so that the anti-loosening purpose is achieved. The structure does not affect the fastening force, does not affect the anti-loose effect, is insensitive to the bolt loosening factors such as transverse vibration force, variable load, temperature change and the like, has simple structure, good anti-loose effect, no maintenance, easy processing and low cost, overcomes the defects in the prior art, and solves the problems of the existing single-pad anti-loose bolt.

It should be noted that: the indentation tooth profile and the arrangement form of the anti-loose washer (3) are not unique, and the anti-loose washer can be embodied in various forms. The indentation teeth of the lock washer (3) in this example are radial triangular teeth with the central axis of the lock washer (3) as the center.

The present invention is described in the following examples, which are only the basic embodiments of the present invention, and modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a single pad check bolt which characterized in that: the single-pad anti-loose bolt is composed of a bolt body (1) with a groove, a main nut (2), an anti-loose washer (3) and a locking nut (4).

2. The single-washer lockbolt of claim 1, wherein: the slotted bolt body (1) is provided with a spiral groove opposite to the screwing direction of the thread, the complementary angle of the spiral angle beta of the spiral groove is larger than the spiral angle lambda of the thread, and the spiral angle beta of the spiral groove is larger than 2 lambda.

3. The single-washer lockbolt of claim 1, wherein: the inner ring surface of the anti-loosening gasket (3) is provided with a spiral stopping piece, the spiral stopping central shaft of the inner ring surface of the anti-loosening gasket (3) is coaxial with the central shaft of the anti-loosening gasket (3), the spiral angle beta 1 of the spiral stopping piece of the anti-loosening gasket (3) is equal to the spiral angle beta of the spiral groove of the grooved bolt (1), the spiral directions of the spiral stopping piece and the spiral groove of the grooved bolt (1) are the same, and the spiral stopping piece of the anti-loosening gasket (3) is matched with the spiral groove of the grooved bolt (1).

4. The single-washer lockbolt of claim 1, wherein: one end of the anti-loose washer (3) is provided with convex indentation teeth, and the hardness of the tooth surface of the indentation teeth of the anti-loose washer (3) is greater than that of the end surface of the main nut (2).

5. The single-washer lockbolt of claim 1, wherein: one end of the main nut (2) is assembled opposite to one end of the anti-loose washer (3) with convex indentation teeth.