CN219101836U

CN219101836U - Thread anti-loosening device

Info

Publication number: CN219101836U
Application number: CN202223476169.3U
Authority: CN
Inventors: 沈昱为; 王坤; 马卫然; 王乐平; 严奇龙
Original assignee: Hongguang Airborne Equipment Co ltd
Current assignee: Hongguang Airborne Equipment Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-30
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a thread anti-loosening device which comprises a bolt with ratchets, a locking sleeve with elastic ratchets and a counter bore with double ears, wherein the counter bore is required to be opened on a workpiece. The connection of the utility model is reliable and loose-proof, and the loose-proof device can not be loosened due to vibration and collision factors. The method is suitable for occasions needing no or little disassembly after installation.

Description

Thread anti-loosening device

Technical Field

The utility model relates to a thread anti-loosening device, in particular to a thread anti-loosening device for preventing a bolt from rotating.

Background

The screw has long lacked convenient and reliable anti-loose measures, but at present only the self-locking nut has not yet had the self-locking screw for in the occasion that does not use the nut, directly tap on the work piece promptly, the screw lacks convenient and reliable anti-loose measures when directly screwing in the work piece. The prior anti-loosening measures mostly adopt friction and elastic anti-loosening, such as a spring washer, an internal tooth washer and the like, the anti-loosening cannot thoroughly limit the rotation of the bolt, and hidden danger of loosening of the bolt exists in the occasion of long-term vibration.

Disclosure of Invention

The utility model aims to provide a thread anti-loosening device, which solves the problem that a screw lacks reliable anti-loosening measures.

The technical solution for realizing the purpose of the utility model is as follows: a thread anti-loosening device comprises a screw and a ratchet locking sleeve, wherein an elastic outer ratchet is arranged at the root of the screw, an elastic ratchet is arranged on the inner ring of the ratchet locking sleeve, and two outer lugs are arranged on the outer side of the ratchet locking sleeve. The workpiece is provided with a counter bore with two lugs, the ratchet locking sleeve is embedded into the counter bore, the two lugs on the ratchet locking sleeve are embedded into the counter bores with corresponding shapes, and the screw is screwed into the ratchet locking sleeve and the workpiece.

Compared with the prior art, the utility model has the remarkable advantages that: the utility model relates to a structure for thoroughly preventing screw rotation.

Drawings

Fig. 1 is a schematic structural view of a thread anti-loosening device according to the present utility model.

Fig. 2 is a schematic view of the structure of the screw of the present utility model.

Fig. 3 is a schematic view of the ratchet locking sleeve structure of the present utility model.

Detailed Description

The utility model relates to a thread anti-loosening device, which comprises a specially manufactured screw 1 and a locking sleeve 2, wherein a counter bore into which a gasket can be embedded is required to be machined on a workpiece into which the screw 1 is required to be screwed. The locking sleeve 2 is sleeved in the counter bore and can not rotate due to double-lug limiting, the locking sleeve 2 is provided with elastic ratchets, and ratchets are processed at the root of the screw 1, so that the screw 1 can only rotate in the screwing direction and can not rotate reversely. Thus, the anti-loose effect is realized.

The utility model is further described below with reference to the drawings.

Referring to fig. 1, a thread anti-loosening structure comprises a screw 1 with ratchets, a locking sleeve 2 with elastic ratchets, and a counter bore with double ears on a workpiece.

The ratchet locking sleeve 2 is embedded into the counter bore with the double ears on the workpiece, the double ears on the locking sleeve 2 are embedded into the counter bores with corresponding shapes, and at the moment, the locking sleeve cannot rotate.

With reference to fig. 2 and 3, an elastic inner ratchet wheel is arranged on the inner ring of the locking sleeve 2, an elastic outer ratchet wheel is arranged at the root of the screw 1, when the screw 1 is screwed into a workpiece, the outer ratchet wheel on the screw 1 can rotate in the screwing direction in the inner ratchet wheel of the locking sleeve 2, and when the outer ratchet wheel rotates, the inclined surface of the outer ratchet wheel pushes the elastic ratchet wheel to elastically deform. After the screw 1 is completely screwed into the end, the elastic ratchet returns under the elastic action, and the normal surface of the outer ratchet of the screw 1 is propped against to prevent the screw from reversing, so that the locking is realized. The connection is reliable and loose-proof, and the loose-proof device cannot be loosened due to vibration and collision factors. The method is suitable for occasions needing no or little disassembly after installation.

Claims

1. A thread anti-loosening device, characterized in that: the novel external ratchet locking sleeve comprises a screw (1) and a ratchet locking sleeve (2), wherein elastic external ratchet teeth are arranged at the root of the screw (1), elastic ratchet teeth are arranged on the inner ring of the ratchet locking sleeve (2), and two external ears are arranged on the outer side of the ratchet locking sleeve (2).

2. The thread anti-loosening device of claim 1, wherein: the workpiece is provided with a counter bore with two lugs, the ratchet locking sleeve (2) is embedded into the counter bore, the two lugs on the ratchet locking sleeve (2) are embedded into the counter bores with corresponding shapes, and the screw (1) is screwed into the ratchet locking sleeve (2) and screwed into the workpiece.