CN211343669U

CN211343669U - Self-locking screw assembly capable of being simply assembled and disassembled

Info

Publication number: CN211343669U
Application number: CN201921645136.2U
Authority: CN
Inventors: 钟昊天; 徐悠; 白榕
Original assignee: China Aviation Industry Standard Parts Manufacturing Co Ltd
Current assignee: China Aviation Industry Standard Parts Manufacturing Co Ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-08-25
Anticipated expiration: 2029-09-29

Abstract

The utility model discloses a but simple and easy loading and unloading formula self-locking screw subassembly, including screw torsion spring (2), bush (3), screw main part (4), its characterized in that: the thread torsion spring (2) is wound on the threads at the front part of the screw main body (4) and has a certain gap, the rear part of the screw main body (4) is sleeved with the bushing (3), one end of the thread torsion spring (2) is connected into the connecting hole A (1) at the front end of the screw main body (4), the other end of the thread torsion spring is connected into the connecting hole B (7) at the front end of the bushing (3), the tail part of the screw main body (4) is provided with the wrenching groove A (5), the tail part of the bushing (3) is correspondingly provided with the wrenching groove B (6), the grooves between the wrenching groove A (5) and the wrenching groove B (6) are separated by a certain angle, and the grooves on the wrenching groove B (6) are. The utility model has the advantages of being simple in structure and convenient in operation, good reproducibility, high-efficient reliable are fit for using widely of loading and unloading auto-lock fastening.

Description

Self-locking screw assembly capable of being simply assembled and disassembled

Technical Field

The utility model belongs to the technical field of fastener, a but simple and easy loading and unloading formula self-locking screw subassembly is related to particularly.

Background

Self-locking screws are common fasteners and are widely used in machinery, electrical appliances and buildings. The existing self-locking screw has the following disadvantages in the use process: firstly, the installation or the disassembly is inconvenient and needs to be completed by a more complex tool; secondly, the screw cannot be reused, and the original design is influenced by replacing the screw; thirdly, the structure is complicated. The above problems all seriously affect the use effect of the self-locking screw and can not meet the expected requirements.

Disclosure of Invention

The utility model aims to overcome above-mentioned shortcoming and provide a but simple and easy loading and unloading formula self-locking screw subassembly that simple structure, convenient operation, good reproducibility, high-efficient reliable.

The utility model discloses the purpose and solve its main technical problem and adopt following technical scheme to realize:

the utility model discloses a but simple and easy loading and unloading formula self-locking screw subassembly, including thread torsion spring, bush, screw main part, wherein: the screw thread torsional spring is wound on the screw thread at the front part of the screw main body and has a certain gap, the rear part of the screw main body is sleeved with the bushing, one end of the screw thread torsional spring is connected in the connecting hole A at the front end of the screw main body, the other end of the screw thread torsional spring is connected in the connecting hole B at the front end of the bushing, the tail part of the screw main body is provided with the wrenching groove A, the tail part of the bushing is correspondingly provided with the wrenching groove B, and the groove between the.

Above-mentioned but simply assembled and disassembled formula self-locking screw subassembly, wherein: the open slot on the wrenching slot B is advanced by 5-10 degrees along the direction of the pointer than the wrenching slot A.

Above-mentioned but simply assembled and disassembled formula self-locking screw subassembly, wherein: the wrenching groove A is a straight groove.

Above-mentioned but simply assembled and disassembled formula self-locking screw subassembly, wherein: the inside installation cavity that is provided with of bush, the installation cavity is arranged in to the screw main part.

Compared with the prior art, the utility model obvious advantage and beneficial effect have. According to the technical scheme, in the simple detachable self-locking screw assembly, the thread torsion spring is wound on the threads at the front part of the screw main body and has a certain gap, the rear part of the screw main body is sleeved with the bushing, one end of the thread torsion spring is connected into the connecting hole A at the front end of the screw main body, the other end of the thread torsion spring is connected into the connecting hole B at the front end of the bushing, so that the effect that the distance between the stress of the thread torsion spring and the threads at the front part of the screw main body is reduced, and the thread torsion spring; the open slot on the wrenching groove B is advanced by 5-10 degrees along the direction along the pointer than the wrenching groove A, so that the screw body is stressed firstly when the screw is screwed in, and the lining is stressed firstly when the screw is screwed out, thereby reducing the distance between the screw body and the lining. In a word, the utility model has the advantages of simple structure and convenient operation, good reproducibility, high efficiency are reliable, are fit for using widely of loading and unloading formula auto-lock fastening.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a partial enlarged view of a in FIG. 1;

FIG. 4 is a schematic structural view of the screw body;

FIG. 5 is a schematic view of the bushing;

FIG. 6 is a right side view of FIG. 5;

FIG. 7 is a view of the engagement of the threaded torsion spring and the screw body when tightened;

FIG. 8 is a view showing a state where the screwing grooves A and the screwing grooves B are engaged with each other when screwing;

fig. 9 is a view showing a state where the screwing grooves a and the screwing grooves B are engaged when screwing out.

The labels in the figure are:

1. a connecting hole A; 2. a threaded torsion spring; 3. a bushing; 4. a screw body; 5. wrenching the groove A; 6. wrenching the groove B; 7. a connecting hole B; 8. and (6) installing the cavity.

Detailed Description

The following detailed description of the embodiments, structures, features and effects of the detachable self-locking screw assembly according to the present invention will be made with reference to the accompanying drawings and the preferred embodiments.

Referring to fig. 1 to 6, the utility model discloses a but simple and easy loading and unloading formula self-locking screw subassembly, including thread torsion spring 2, bush 3, screw main part 4, wherein: the threaded torsion spring 2 is wound on threads at the front part of the screw body 4 and has a certain gap, the rear part of the screw body 4 is sleeved with the bushing 3, one end of the threaded torsion spring 2 is connected into a connecting hole A1 at the front end of the screw body 4, the other end of the threaded torsion spring is connected into a connecting hole B7 at the front end of the bushing 3, the tail part of the screw body 4 is provided with a pulling and screwing groove A5, the tail part of the bushing 3 is correspondingly provided with a pulling and screwing groove B6, and the grooves between the pulling and screwing grooves A5 and B6 are separated. The slot in wrenching slot B6 is advanced 5-10 deg. in the direction of the pointer from wrenching slot a 5. The wrenching grooves A5 are straight grooves. The bush 3 is internally provided with a mounting cavity 8, and the screw body 4 is arranged in the mounting cavity 8.

When the self-locking screw is screwed in clockwise (seen along the tail part of the screw body 4), referring to fig. 7 to 8, because the open slot on the screwing slot B6 is advanced by 5 to 10 degrees in the direction along the pointer than the screwing slot a5, the screw body 4 rotates before the bushing 3 due to stress, the thread torsion spring 2 is screwed, the gap between the screw body 4 and the thread torsion spring 2 is reduced, the outer diameter of the thread is reduced, and the screw is smoothly screwed into the mounting position. When the wrenching force is removed when screwed into the installed position, the threaded torsion spring 2 returns to the relaxed state. In the use, because the screw thread turning direction of the thread torsion spring 2 is the same as that of the screw main body 4, when the screw is possibly screwed out due to vibration, the screw main body 4 rotates to drive the thread torsion spring 2 to expand thick, so that the friction force between the thread torsion spring 2 and the mounting hole is increased, and the thread torsion spring cannot be screwed out to achieve the self-locking purpose.

When the self-locking screw is screwed in anticlockwise (seen along the tail part of the screw main body 4), referring to fig. 9, because the open slot on the screwing slot B6 is advanced by 5-10 degrees in the direction along the pointer compared with the screwing slot A5, the bushing 3 rotates before the screw main body 4 due to stress, the threaded torsion spring 2 is screwed, the gap between the screw main body 4 and the threaded torsion spring 2 is reduced, the external diameter of the thread is reduced, and the screw is smoothly screwed out of the mounting position.

Because this screw no matter is when screwing in or when unscrewing, is the less torsional force of screw torsion spring 2, and does not lead to the fact destruction to this screw, so this screw repeatedly usable still has the auto-lock performance. The utility model has the advantages of being simple in structure and convenient in operation, good reproducibility, high-efficient reliable are fit for using widely of loading and unloading auto-lock fastening.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and any simple modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention.

Claims

1. The utility model provides a but simple and easy loading and unloading formula self-locking screw subassembly, includes screw thread torsional spring (2), bush (3), screw main part (4), its characterized in that: the screw thread torsion spring (2) is wound on the screw thread at the front part of the screw main body (4) and has a certain gap, the rear part of the screw main body (4) is sleeved with the bushing (3), one end of the screw thread torsion spring (2) is connected in the connecting hole A (1) at the front end of the screw main body (4), the other end of the screw thread torsion spring is connected in the connecting hole B (7) at the front end of the bushing (3), the tail part of the screw main body (4) is provided with the wrenching groove A (5), the tail part of the bushing (3) is correspondingly provided with the wrenching groove B (6), and the grooves between the wrenching groove A (5).

2. The self-locking screw assembly that is easily removable according to claim 1, wherein: the open slot on the wrenching slot B (6) is advanced by 5-10 degrees along the direction of the pointer than the wrenching slot A (5).

3. The self-locking screw assembly that is easily removable according to claim 1, wherein: the wrenching groove A (5) is a straight groove.

4. The self-locking screw assembly that is easily removable according to claim 1, wherein: an installation cavity (8) is formed in the lining (3), and the screw main body (4) is arranged in the installation cavity (8).