CN112855727A

CN112855727A - Anti-loosening bolt

Info

Publication number: CN112855727A
Application number: CN202110242497.8A
Authority: CN
Inventors: 吕贵刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-05-28

Abstract

The check bolt is composed of a bolt body (1) with a groove, a check nut (2), a lock washer (3) and a lock nut (4). The check bolt adjusts pre-tightening torque through the check nut (2), and while friction self-locking is kept, a locking structure is formed by the serrated surface of the check nut (2), the elastic teeth and the backstop of the lock washer (3), the spiral groove of the grooved bolt (1) and the lock nut (4) to compress and stabilize the check nut (2), so that the check nut (2) does not have a retreat gap and keeps pre-tightening force, and therefore the purpose of preventing looseness is achieved. The structure does not affect fastening force, does not affect anti-loosening effect, is insensitive to the factors affecting bolt loosening such as transverse vibration force, variable load, temperature change and the like, has simple structure, good anti-loosening effect and no maintenance, overcomes the defects in the prior art, and solves the problems existing in the prior anti-loosening bolt.

Description

Anti-loosening bolt

Technical Field

The invention relates to the technical field of bolt fastening, in particular to a check 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 designs are researched, but at present, the methods and the designs are still not satisfactory in a plurality of use occasions and need to be perfected.

Disclosure of Invention

The invention aims to provide a check bolt which has a good check effect and is maintenance-free, so that the defects in the prior art are overcome, and the problems of the existing check bolt are solved.

The invention is realized by the following technical scheme: the anti-loosening bolt is composed of a bolt body (1) with a groove, an anti-loosening nut (2), a locking 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, and the complementary angle of the spiral angle beta of the spiral groove is larger than the spiral angle lambda of the thread. One end of the locknut (2) is provided with radial uniformly distributed serrated surfaces, the central axis of the radial uniformly distributed serrated surfaces of the locknut (2) is concentric with the central axis of the thread, one side of the radial uniformly distributed serrated surfaces of the locknut (2) is a slow inclined plane, the other side of the radial uniformly distributed serrated surfaces of the locknut (2) is a steep inclined plane, and the inclined plane angle alpha of the radial uniformly distributed serrated surfaces of the locknut (2) is larger than the thread helix angle lambda. One end of the locking washer (3) is provided with uniformly distributed claw-shaped elastic teeth, and the oblique angle alpha 1 of the uniformly distributed claw-shaped elastic teeth of the locking washer (3) is larger than the oblique angle alpha of the sawtooth surface of the locknut (2). The inner ring surface of the locking washer (3) is provided with a stop, the stop section of the locking washer (3) is the same as the section of the spiral groove of the bolt with groove (1), the stop section of the locking washer (3) is matched with the spiral groove of the bolt with groove (1), the spiral angle beta 1 of the stop section of the locking washer (3) is equal to the spiral angle beta of the spiral groove of the bolt with groove (1), and the spiral directions of the two spiral angles are the same. The locking nut (2) one end that has the serrated surface with the locking washer (3) one end that has the elasticity tooth assemble relatively, the equipartition claw shape elasticity tooth of locking washer (3) stretch out the opposite direction with locking nut (2) screw thread direction.

The advantages and effects are as follows:

the invention has the following advantages and beneficial effects:

1. the anti-loosening effect is good, and maintenance is not needed after the torque is adjusted.

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

Drawings

FIG. 1 is a front view of the overall structure of a check bolt;

FIG. 2 is a partial schematic view I of the front schematic view of the overall structure of the check bolt;

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

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

FIG. 5 is a side schematic view of the lock washer;

FIG. 6 is a schematic front view of a lock washer taken along line A-A;

FIG. 7 is a schematic front view of the locknut;

FIG. 8 is a side view of the locknut;

fig. 9 is a partial schematic view II of a side schematic view of the locknut.

Description of reference numerals:

1-a bolt body with a groove, 2-a locknut, 3-a lock washer, 4-a locknut, 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: the anti-loosening bolt is composed of a bolt body (1) with a groove, an anti-loosening nut (2), a locking 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, and the complementary angle of the spiral angle beta of the spiral groove is larger than the spiral angle lambda of the thread. One end of the locknut (2) is provided with radial uniformly distributed serrated surfaces, the central axis of the radial uniformly distributed serrated surfaces of the locknut (2) is concentric with the central axis of the thread, one side of the radial uniformly distributed serrated surfaces of the locknut (2) is a slow inclined plane, the other side of the radial uniformly distributed serrated surfaces of the locknut (2) is a steep inclined plane, and the inclined plane angle alpha of the radial uniformly distributed serrated surfaces of the locknut (2) is larger than the thread helix angle lambda. One end of the locking washer (3) is provided with uniformly distributed claw-shaped elastic teeth, and the oblique angle alpha 1 of the uniformly distributed claw-shaped elastic teeth of the locking washer (3) is larger than the oblique angle alpha of the sawtooth surface of the locknut (2). The inner ring surface of the locking washer (3) is provided with a stop, the stop section of the locking washer (3) is the same as the section of the spiral groove of the bolt with groove (1), the stop section of the locking washer (3) is matched with the spiral groove of the bolt with groove (1), the spiral angle beta 1 of the stop section of the locking washer (3) is equal to the spiral angle beta of the spiral groove of the bolt with groove (1), and the spiral directions of the two spiral angles are the same. The locking nut (2) one end that has the serrated surface with the locking washer (3) one end that has the elasticity tooth assemble relatively, the equipartition claw shape elasticity tooth of locking washer (3) stretch out the opposite direction with locking nut (2) screw thread direction.

In use, the bolt body (1) with the groove penetrates through a fastened piece I (5) and a fastened piece II (6), then the end, without the serrated surface, of the locknut (2) is screwed to the fastened piece and is screwed to the required working torque, then the end, with the elastic teeth, of the lock washer (3) is assembled with the end, with the serrated surface, of the locknut (2), the stop of the lock washer (3) is embedded into the spiral groove of the bolt with the groove (1), the locknut (4) is screwed to press the elastic teeth of the lock washer (3) to stretch to the steep inclined surface of the serrated surface of the locknut (2) and abut against the steep inclined surface of the serrated surface of the locknut (2), and finally the locknut (4) is screwed to the specified torque, and the whole fastening process is finished. When the fastened piece needs to be adjusted, the fastening program is executed reversely, and after the adjustment is completed, the program is executed again to complete the re-fastening. The anti-loosening bolt is convenient to mount, adjust and dismount and can be repeatedly used.

The check bolt adjusts pre-tightening torque through the check nut (2), and while friction self-locking is kept, a locking structure is formed by the serrated surface of the check nut (2), the elastic teeth and the backstop of the lock washer (3), the spiral groove of the grooved bolt (1) and the lock nut (4) to compress and stabilize the check nut (2), so that the check nut (2) does not have a retreat gap and keeps pre-tightening force, and therefore the purpose of preventing looseness is achieved. The structure does not affect fastening force, does not affect anti-loosening effect, is insensitive to the factors affecting bolt loosening such as transverse vibration force, variable load, temperature change and the like, has simple structure, good anti-loosening effect and no maintenance, overcomes the defects in the prior art, and solves the problems existing in the prior anti-loosening bolt.

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. A check bolt is characterized in that: the anti-loosening bolt is composed of a bolt body (1) with a groove, an anti-loosening nut (2), a locking washer (3) and a locking nut (4).

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

3. The lockbolt of claim 1, wherein: one end of the locknut (2) is provided with radial uniformly distributed serrated surfaces, the central axis of the radial uniformly distributed serrated surfaces of the locknut (2) is concentric with the central axis of the thread, one side of the radial uniformly distributed serrated surfaces of the locknut (2) is a slow inclined plane, the other side of the radial uniformly distributed serrated surfaces of the locknut (2) is a steep inclined plane, and the inclined plane angle alpha of the radial uniformly distributed serrated surfaces of the locknut (2) is larger than the thread helix angle lambda.

4. The lockbolt of claim 1, wherein: one end of the locking washer (3) is provided with uniformly distributed claw-shaped elastic teeth, and the oblique angle alpha 1 of the uniformly distributed claw-shaped elastic teeth of the locking washer (3) is larger than the oblique angle alpha of the sawtooth surface of the locknut (2).

5. The lockbolt of claim 1, wherein: the inner ring surface of the locking washer (3) is provided with a stop, the stop section of the locking washer (3) is the same as the section of the spiral groove of the bolt with groove (1), the stop section of the locking washer (3) is matched with the spiral groove of the bolt with groove (1), the spiral angle beta 1 of the stop section of the locking washer (3) is equal to the spiral angle beta of the spiral groove of the bolt with groove (1), and the spiral directions of the two spiral angles are the same.

6. The lockbolt of claim 1, wherein: the locking nut (2) one end that has the serrated surface with the locking washer (3) one end that has the elasticity tooth assemble relatively, the equipartition claw shape elasticity tooth of locking washer (3) stretch out the opposite direction with locking nut (2) screw thread direction.