CN216768033U - Double-nut combined self-locking anti-loosening structure - Google Patents
Double-nut combined self-locking anti-loosening structure Download PDFInfo
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- CN216768033U CN216768033U CN202123029493.6U CN202123029493U CN216768033U CN 216768033 U CN216768033 U CN 216768033U CN 202123029493 U CN202123029493 U CN 202123029493U CN 216768033 U CN216768033 U CN 216768033U
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Abstract
The utility model belongs to the technical field of double-nut anti-loose thread structures, and particularly relates to a double-nut combined self-locking anti-loose structure. According to the utility model, the thread pitch value of the fine-tuning variable-pitch nut is slightly larger than the thread pitch of the bolt in a mode of combining the fine-tuning variable-pitch nut with the standard thread pitch nut, after the pre-tightening force is applied to the thread structure, the thread of the bolt is extruded by the force of the thread of the nut to generate larger deformation, and after the pre-tightening force is cancelled, the thread of the bolt rebounds to form inter-thread self-locking with the thread of the fine-tuning variable-pitch nut, so that the combined structure of the fine-tuning variable-pitch nut and the standard thread pitch nut is more reliable than that of a standard double-nut combined structure. The utility model has simple structure processing and easy realization, and is suitable for double-nut self-locking anti-loosening threaded connection structure in industry.
Description
Technical Field
The utility model belongs to the technical field of double-nut anti-loose thread structures, and particularly relates to a double-nut combined self-locking anti-loose structure.
Background
The double-nut anti-loose thread structure is widely applied in industry, but the standard thread connection structure does not have self-locking performance, and the double-standard pitch nut combination cannot achieve the complete self-locking anti-loose performance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a double-nut combined self-locking anti-loosening structure which can be widely applied and is easy to realize.
A double-nut combined self-locking anti-loosening structure comprises a micro-adjusting pitch nut, a standard pitch nut and a bolt; the screw pitch value of the standard screw pitch nut is P; the pitch value P' of the fine-tuning variable-pitch nut is slightly larger than P; when the micro-adjustable pitch nut and the standard pitch nut are meshed with the bolt, the standard pitch nut is screwed in first, and then the micro-adjustable pitch nut is screwed in, so that the self-locking anti-loosening performance is realized.
Further, the thread number of the micro-adjustable pitch nut is not less than 5 and not more than 7.
Further, the pitch value of the micro-adjustable pitch nut is P' 1.01P.
The utility model has the beneficial effects that:
according to the utility model, the thread connection self-locking property higher than that of a standard double-nut combination is obtained by combining the micro-adjustable pitch nut and the standard pitch nut, the structure processing is simple, the realization is easy, and the method is suitable for the double-nut self-locking anti-loosening thread connection structure in the industry.
Drawings
Fig. 1 is a schematic structural view of a double-nut combined self-locking anti-loosening structure in practical application.
Fig. 2 is a self-locking schematic view of thread teeth after the fine-tuning variable-pitch nut is meshed with a standard bolt.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
The utility model provides a double-nut combined self-locking anti-loosening structure, which is characterized in that after a nut is meshed with a bolt based on a mode of finely adjusting and increasing the thread pitch of the nut, the thread of the bolt and the thread of the nut are meshed and clamped, so that better self-locking anti-loosening performance is achieved.
The utility model adopts the combination form of the micro-adjustable pitch nut and the standard pitch nut to replace the traditional standard pitch double-nut thread structure. Increasing the pitch value P 'of the fine-tuning variable-pitch nut to enable P' to be 1.01P, wherein P is a standard pitch value; the thread form and the thread angle of the micro-adjustable pitch nut are consistent with those of a standard pitch nut, and only the pitch value is slightly adjusted and increased. The thread number of the micro-adjustable pitch nut is not less than 5 and not more than 7.
As shown in fig. 1, when the fine-tuning variable pitch nut and the standard pitch nut are engaged with the bolt, the standard pitch nut is screwed in first and then the fine-tuning variable pitch nut is screwed in, so that the self-locking anti-loosening performance is realized.
As shown in fig. 2, since the pitch value of the fine-tuning variable-pitch nut is slightly larger than the pitch of the bolt, after a pretightening force is applied to the thread structure, the thread of the bolt is extruded by the force of the thread of the bolt to generate a large deformation, and after the pretightening force is cancelled, the thread of the bolt rebounds to form interdental self-locking with the thread of the fine-tuning variable-pitch nut. The fine-tuning variable-pitch nut and standard-pitch nut combined structure is more reliable than a standard double-nut combined structure.
The utility model obtains the thread connection self-locking property higher than that of the standard double-nut combination by combining the micro-adjusting pitch nut and the standard pitch nut, has simple structure processing and easy realization, and is suitable for the double-nut self-locking anti-loosening thread connection structure in the industry.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a two nut combination auto-lock anti-loosening structure which characterized in that: comprises a micro-adjustable pitch nut, a standard pitch nut and a bolt; the screw pitch value of the standard screw pitch nut is P; the thread form and the thread angle of the micro-adjustable pitch nut are consistent with those of the standard pitch nut, and the pitch value P' of the micro-adjustable pitch nut is slightly larger than P; when the micro-adjustable pitch nut and the standard pitch nut are meshed with the bolt, the standard pitch nut is screwed in first, and then the micro-adjustable pitch nut is screwed in, so that the self-locking anti-loosening performance is realized.
2. The double-nut combined self-locking anti-loosening structure according to claim 1, wherein: the thread number of the fine-tuning variable-pitch nut is not less than 5 and not more than 7.
3. The double-nut combined self-locking anti-loosening structure according to claim 1, wherein: the thread pitch value of the fine-adjustment variable-pitch nut is 1.01P'.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123029493.6U CN216768033U (en) | 2021-12-02 | 2021-12-02 | Double-nut combined self-locking anti-loosening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123029493.6U CN216768033U (en) | 2021-12-02 | 2021-12-02 | Double-nut combined self-locking anti-loosening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216768033U true CN216768033U (en) | 2022-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123029493.6U Active CN216768033U (en) | 2021-12-02 | 2021-12-02 | Double-nut combined self-locking anti-loosening structure |
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| CN (1) | CN216768033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087268A (en) * | 2021-12-02 | 2022-02-25 | 中国船舶重工集团公司第七0三研究所 | Double-nut combined self-locking anti-loosening structure |
-
2021
- 2021-12-02 CN CN202123029493.6U patent/CN216768033U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087268A (en) * | 2021-12-02 | 2022-02-25 | 中国船舶重工集团公司第七0三研究所 | Double-nut combined self-locking anti-loosening structure |
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