CN218207418U

CN218207418U - Screw withdrawing prevention bolt

Info

Publication number: CN218207418U
Application number: CN202222113597.3U
Authority: CN
Inventors: 王启程; 胡凤英; 刁海林
Original assignee: Suzhou Changhuai Manda Precision Hardware Co ltd
Current assignee: Suzhou Changhuai Manda Precision Hardware Co ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2023-01-03
Anticipated expiration: 2032-08-11

Abstract

The utility model relates to the technical field of bolts, in particular to screw-back prevention bolt, including first bolt, second bolt and nut, first bolt include first screw rod and with the first bolt head of first screw rod top integration, the nut with first screw rod threaded connection, the bolt hole has been seted up to the one end that first bolt head was kept away from to first screw rod, the second bolt include second screw rod and with the second bolt head of second screw rod top integration, the second screw rod is connected with the inside wall threaded connection of bolt hole, the screw thread direction is opposite on first screw rod and the second screw rod, be provided with locating component between nut and the second bolt head; the utility model discloses ensure that whole bolted connection's is effective reliable, effectively prevented moving back of bolt silk and drop.

Description

Screw withdrawing prevention bolt

Technical Field

The utility model relates to a bolt technical field, in particular to prevent moving back a screw bolt.

Background

With the continuous improvement of living conditions of people, automobiles advance into daily life, simultaneously, the global automobile industry is developed vigorously, and bolts are generally used for fastening or positioning parts in the existing automobile assembling process. However, there is a risk that the bolt may be loosened and dropped once the bolt is in a vibration state for a long time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent moving back a screw bolt to solve above-mentioned technical problem.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

the utility model provides a screw bolt prevents moving back, includes first bolt, second bolt and nut, first bolt include first screw rod and with the first bolt head of first screw rod top integration, the nut with first screw rod threaded connection, the bolt hole has been seted up to the one end that first bolt head was kept away from to first screw rod, the second bolt include the second screw rod and with the second bolt head of second screw rod top integration, the inside wall threaded connection of second screw rod and bolt hole, the screw thread direction of rotation is opposite on first screw rod and the second screw rod, be provided with locating component between nut and the second bolt head.

Furthermore, a placing groove is formed in one end, close to the nut, of the second bolt head; the positioning assembly comprises a spring and a positioning pin, one end of the spring is fixedly connected to the bottom of the placing groove, the other end of the spring is fixedly connected to the top end of the positioning pin, and the nut is provided with a positioning groove for accommodating the positioning pin.

Furthermore, a spring washer is sleeved on the first screw rod and located on one side, far away from the second bolt head, of the nut.

Furthermore, a first gasket and a second gasket are sleeved on the first screw rod, and the first gasket and the second gasket are located on one side, away from the nut, of the spring washer.

Further, the first gasket and the second gasket are made of a metal material.

The beneficial effects of the utility model are that:

because the rotation directions of the nut and the second screw rod are opposite and are both arranged on the first screw rod, the nut and the second screw rod cannot rotate in the same direction simultaneously due to the vibration force, and meanwhile, the nut and the second bolt head cannot rotate relatively through the arrangement of the positioning assembly, so that the purpose of preventing the screw from withdrawing is achieved; the utility model discloses ensure that whole bolted connection's is effective reliable, effectively prevented moving back of bolt silk and drop.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic structural view of a first bolt in the present invention;

FIG. 3 is a front view of the present invention;

fig. 4 is a cross-sectional view of the present invention;

fig. 5 is an enlarged schematic view of a portion a of fig. 4.

Reference numerals: a first screw 1; a first bolt head 2; a second screw 3; a second bolt head 4; a placement groove 41; a nut 5; a positioning groove 51; a positioning assembly 6; a spring 61; positioning pins 62; a spring washer 7; a first gasket 8; a second gasket 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, 2, 3, 4, and 5, a screw-back preventing bolt includes a first bolt, a second bolt, and a nut 5, where the first bolt includes a first screw rod 1 and a first bolt head 2 integrated with a top end of the first screw rod 1, the nut 5 is in threaded connection with the first screw rod 1, a bolt hole is formed in one end of the first screw rod 1 away from the first bolt head 2, the second bolt includes a second screw rod 3 and a second bolt head 4 integrated with a top end of the second screw rod 3, the second screw rod 3 is in threaded connection with an inner side wall of the bolt hole, screwing directions of the first screw rod 1 and the second screw rod 3 are opposite, and a positioning assembly 6 is disposed between the nut 5 and the second bolt head 4.

When the anti-back-screwing device is used, the nut 5 on the first screw rod 1 is screwed tightly to abut against a fastened piece, the second screw rod 3 is screwed into the bolt hole until the second bolt head 4 abuts against the nut 5, the nut 5 and the second bolt head 4 are connected through the positioning assembly 6, as the screwing directions of the nut 5 and the second screw rod 3 are opposite and are both arranged on the first screw rod 1, the nut 5 and the second screw rod 3 cannot rotate in the same direction at the same time due to the vibration force, and meanwhile, the nut 5 and the second bolt head 4 cannot rotate relatively through the positioning assembly 6, so that the purpose of preventing back-screwing is achieved; the utility model discloses ensure that whole bolted connection's is effective reliable, effectively prevented moving back of bolt silk and drop.

As shown in fig. 4 and 5, a placement groove 41 is formed at one end of the second bolt head 4 close to the nut 5; the positioning assembly 6 comprises a spring 61 and a positioning pin 62, one end of the spring 61 is fixedly connected to the bottom of the placing groove 41, the other end of the spring 61 is fixedly connected to the top end of the positioning pin 62, and the nut 5 is provided with a positioning groove 51 for accommodating the positioning pin 62; in this embodiment, the second screw 3 is screwed down to make the second bolt head 4 close to the nut 5, the positioning pin 62 is aligned with the positioning groove 51 and enters the positioning groove 51, the second screw 3 cannot be screwed any more, the second bolt head 4 and the nut 5 are locked, the second bolt head 4 and the nut 5 cannot rotate, and the connection between the second bolt head 4 and the nut 5 is more stable.

As shown in fig. 1, 3 and 4, a spring washer 7 is sleeved on the first screw rod 1, and the spring washer 7 is located on the side of the nut 5 away from the second bolt head 4; in this embodiment, when the nut 5 is installed, the spring washer 7 is located between the fastened member and the nut 5, and due to the pre-tension of the spring washer 7, after the nut 5 presses the spring washer 7, the nut 5 and the first screw rod 1 are tightly attached together under the pre-tension, and under the friction force, the nut 5 is not loosened.

As shown in fig. 1, 3 and 4, a first gasket 8 and a second gasket 9 are sleeved on the first screw rod 1, and the first gasket 8 and the second gasket 9 are located on one side of the spring washer 7 away from the nut 5; in this embodiment, during the installation, first gasket 8 and second gasket 9 are located by the fastener both sides, and increase fastening area of contact prevents the bolt and takes place the friction by the fastener, and the protection is by the surface of fastener, and the fish tail is by the fastener surface when preventing bolt and nut from screwing up.

As shown in fig. 1, 3 and 4, the first gasket 8 and the second gasket 9 are made of a metal material; in this embodiment, the first gasket 8 and the second gasket 9 are made of metal materials, so that the protection effect of the first gasket 8 and the second gasket 9 is improved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a prevent moving back a screw bolt which characterized in that: including first bolt, second bolt and nut (5), first bolt include first screw rod (1) and with first bolt head (2) of first screw rod (1) top integration, nut (5) with first screw rod (1) threaded connection, the bolt hole has been seted up to the one end that first bolt head (2) were kept away from in first screw rod (1), the second bolt include second screw rod (3) and with second bolt head (4) of second screw rod (3) top integration, second screw rod (3) and the inside wall threaded connection of bolt hole, the screw thread direction of turning is opposite on first screw rod (1) and second screw rod (3), be provided with locating component (6) between nut (5) and second bolt head (4).

2. The wire withdrawal prevention bolt according to claim 1, wherein: a placing groove (41) is formed in one end, close to the nut (5), of the second bolt head (4); the positioning assembly (6) comprises a spring (61) and a positioning pin (62), one end of the spring (61) is fixedly connected to the bottom of the placing groove (41), the other end of the spring (61) is fixedly connected to the top end of the positioning pin (62), and a positioning groove (51) used for containing the positioning pin (62) is formed in the nut (5).

3. The screw bolt of claim 1, wherein: a spring washer (7) is sleeved on the first screw (1), and the spring washer (7) is located on one side, away from the second bolt head (4), of the nut (5).

4. The screw bolt of claim 3, wherein: the first screw rod (1) is sleeved with a first gasket (8) and a second gasket (9), and the first gasket (8) and the second gasket (9) are located on one side, away from the nut (5), of the spring washer (7).

5. The screw bolt of claim 4, wherein: the first gasket (8) and the second gasket (9) are made of a metal material.