CN216589520U

CN216589520U - Anti-loosening bolt

Info

Publication number: CN216589520U
Application number: CN202120583966.8U
Authority: CN
Inventors: 吕贵刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2022-05-24
Anticipated expiration: 2031-02-26

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 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 body (1) and the lock nut (4) to compress and stabilize the check nut (2) while maintaining friction self-locking, so that the check nut (2) does not have a back clearance and maintains 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 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 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 consists of a bolt body (1) with a groove, an anti-loosening nut (2), an anti-loosening washer (3) and a locking nut (4). The bolt body (1) with the groove is provided with a spiral groove opposite to the screwing direction of the thread, the spiral angle beta of the spiral groove is larger than the spiral surface spiral angle alpha of the locknut (2), and the residual 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 a radially and uniformly distributed spiral surface, the central axis of the spiral surface of the locknut (2) is concentric with the central axis of the thread, the spiral direction of the spiral surface of the locknut (2) is opposite to the spiral direction of the thread, and the spiral angle alpha of the spiral surface of the locknut (2) is larger than the spiral angle lambda of the thread. One end of the anti-loosening gasket (3) is provided with a radially and uniformly distributed spiral surface, the central axis of the spiral surface of the anti-loosening gasket (3) is concentric with the central axis of the anti-loosening gasket (3), the spiral angle alpha 1 of the spiral surface of the anti-loosening gasket (3) is equal to the spiral angle alpha of the spiral surface of the anti-loosening nut (2), and the rotating direction of the radially and uniformly distributed spiral surface of the anti-loosening gasket (3) is the same as the stopping rotating direction of the inner ring surface. The inner ring surface of the anti-loosening washer (3) is provided with a stop, the stop section of the anti-loosening washer (3) is the same as the section of the spiral groove of the bolt with groove (1), the spiral angle beta 1 of the stop of the anti-loosening washer (3) is equal to the spiral angle beta of the spiral groove of the bolt with groove (1), the spiral directions of the spiral angle beta and the spiral groove are the same, and the stop of the anti-loosening washer (3) is matched with the spiral groove of the bolt with groove (1). One end of the locknut (2) with the spiral surface is assembled opposite to one end of the lockwasher (3) with the spiral surface.

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 schematic front view of an overall structure of a check bolt;

FIG. 2 is a schematic front view of a slotted bolt;

FIG. 3 is a schematic front view of a lock washer;

FIG. 4 is a sectional view of the lock washer taken along line A-A in a front view;

FIG. 5 is a partial schematic view I of a cross-sectional view of a lock washer A-A;

FIG. 6 is a schematic front view of the locknut;

FIG. 7 is a side view of the locknut;

fig. 8 is a partial schematic view II of the side schematic view of the locknut.

Description of reference numerals:

1-a bolt body with a groove, 2-a locknut, 3-a lockwasher, 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 consists of a bolt body (1) with a groove, an anti-loosening nut (2), an anti-loosening washer (3) and a locking nut (4). The bolt body (1) with the groove is provided with a spiral groove opposite to the screwing direction of the thread, the spiral angle beta of the spiral groove is larger than the spiral surface spiral angle alpha of the locknut (2), and the residual 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 a radially and uniformly distributed spiral surface, the central axis of the spiral surface of the locknut (2) is concentric with the central axis of the thread, the spiral direction of the spiral surface of the locknut (2) is opposite to the spiral direction of the thread, and the spiral angle alpha of the spiral surface of the locknut (2) is larger than the spiral angle lambda of the thread. One end of the anti-loosening gasket (3) is provided with a radially and uniformly distributed spiral surface, the central axis of the spiral surface of the anti-loosening gasket (3) is concentric with the central axis of the anti-loosening gasket (3), the spiral angle alpha 1 of the spiral surface of the anti-loosening gasket (3) is equal to the spiral angle alpha of the spiral surface of the anti-loosening nut (2), and the rotating direction of the radially and uniformly distributed spiral surface of the anti-loosening gasket (3) is the same as the stopping rotating direction of the inner ring surface. The inner ring surface of the anti-loosening washer (3) is provided with a stop, the stop section of the anti-loosening washer (3) is the same as the section of the spiral groove of the bolt with groove (1), the spiral angle beta 1 of the stop of the anti-loosening washer (3) is equal to the spiral angle beta of the spiral groove of the bolt with groove (1), the spiral directions of the spiral angle beta and the spiral groove are the same, and the stop of the anti-loosening washer (3) is matched with the spiral groove of the bolt with groove (1). One end of the locknut (2) with the spiral surface is assembled opposite to one end of the lockwasher (3) with the spiral surface.

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 spiral surface of the locknut (2) is screwed to the fastened piece and is screwed to the required working torque, then the end with the spiral surface of the lockwasher (3) is assembled opposite to the end with the spiral surface of the locknut (2), at the moment, the stop of the lockwasher (3) is embedded into the spiral groove of the bolt with the groove (1), 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 spiral surface of the check nut (2), the spiral surface and the backstop of the check 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 back clearance is avoided, the pre-tightening force is kept, and 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 consists of a bolt body (1) with a groove, an anti-loosening nut (2), an anti-loosening washer (3) and a locking nut (4);

the bolt body (1) with the groove is provided with a spiral groove opposite to the screwing direction of the thread, the spiral angle beta of the spiral groove is larger than the spiral surface spiral angle alpha of the locknut (2), and the residual angle of the spiral angle beta of the spiral groove is larger than the spiral angle lambda of the thread;

one end of the anti-loosening gasket (3) is provided with a radially and uniformly distributed spiral surface, the central axis of the spiral surface of the anti-loosening gasket (3) is concentric with the central axis of the anti-loosening gasket (3), the spiral angle alpha 1 of the spiral surface of the anti-loosening gasket (3) is equal to the spiral angle alpha of the spiral surface of the anti-loosening nut (2), and the rotation direction of the radially and uniformly distributed spiral surface of the anti-loosening gasket (3) is the same as the stopping rotation direction of the inner ring surface;

the spiral groove of the bolt body (1) with the groove and the locknut (4) form a locking structure to compress and stabilize the locknut (2) so that the locknut has no back clearance.

2. The lockbolt of claim 1, wherein: one end of the locknut (2) is provided with a radially and uniformly distributed spiral surface, the central axis of the spiral surface of the locknut (2) is concentric with the central axis of the thread, the spiral direction of the spiral surface of the locknut (2) is opposite to the spiral direction of the thread, and the spiral angle alpha of the spiral surface of the locknut (2) is larger than the spiral angle lambda of the thread.

3. The lockbolt of claim 1, wherein: the inner ring surface of the anti-loosening gasket (3) is provided with a stop, the stop section of the anti-loosening gasket (3) is the same as the section of the spiral groove of the bolt body with the groove (1), the spiral angle beta 1 of the stop of the anti-loosening gasket (3) is equal to the spiral angle beta of the spiral groove of the bolt body with the groove (1), the spiral directions of the spiral angle beta 1 and the spiral groove are the same, and the stop of the anti-loosening gasket (3) is matched with the spiral groove of the bolt body with the groove (1).

4. The lockbolt of claim 1, wherein: one end of the locknut (2) with the spiral surface is assembled opposite to one end of the lockwasher (3) with the spiral surface.