CN214837711U - Eccentric locknut - Google Patents
Eccentric locknut Download PDFInfo
- Publication number
- CN214837711U CN214837711U CN202120720052.1U CN202120720052U CN214837711U CN 214837711 U CN214837711 U CN 214837711U CN 202120720052 U CN202120720052 U CN 202120720052U CN 214837711 U CN214837711 U CN 214837711U
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- thread
- central axis
- eccentric
- nut body
- nut
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Abstract
The utility model discloses an eccentric locknut, which comprises a nut body, wherein the nut body is axially provided with a through threaded hole and is radially provided with a tool withdrawal groove, the upper end thread of the tool withdrawal groove is set as a first thread, and the lower end thread of the tool withdrawal groove is set as a second thread; the central axis of the first thread is not concentric with the central axis of the nut body, and the central axis of the second thread is concentric with the central axis of the nut body; the central axis of the first thread has an eccentric distance e from the central axis of the second thread. The utility model discloses simple structure, simple to operate because eccentric lock nut's eccentric settings, the nut body produces inward radial locking force to connecting bolt, has increased substantially locking effect.
Description
Technical Field
The utility model relates to a mechanical fastener technical field especially relates to an eccentric locknut.
Background
In many precise or strict equipment or industries, the problem of nut loosening is always a relatively headache problem, but as the manufacturing technology is mature, the locknuts are more and more widely used, and there are three common methods for nut loosening: friction locking, mechanical locking and riveting locking. The friction anti-loosening is to generate a positive pressure which does not change along with external force between the locking nut pairs so as to generate a friction force which can prevent the locking nut pairs from rotating relatively, such as an elastic washer, a double nut, a self-locking nut, an insert locking nut and the like; the mechanical anti-loosening is to directly limit the relative rotation of a locknut pair by using a locknut stop piece, such as a tooth-opening pin, a serial steel wire, a stop washer and the like; riveting and punching anti-loosening are realized by adopting methods of punching, welding, bonding and the like after screwing, so that the anti-loosening nut pair loses the characteristic of a kinematic pair and is connected into non-detachable connection, and the method mostly destroys a threaded fastener during detachment and cannot be repeatedly used. The anti-loosening method has the advantages and disadvantages, or the structure is complex, the performance is unstable, or the anti-loosening method cannot be repeatedly used, so that the comprehensive factors of all aspects need to be further improved.
Eccentric nut in the market is mainly hadamard nut, and this kind of nut is supporting use, including lock nut and eccentric nut, the up end of eccentric nut has the boss of upwards extending, lock nut's lower terminal surface is equipped with the recess hole with boss complex, the central axis of eccentric nut's boss is eccentric rather than the central axis at screw thread place, the central axis of recess hole on the lock nut is concentric rather than the central axis at screw thread place, its unique structure makes eccentric lock nut have locking force big, vibrate more tightly, antiskid, a series of advantages such as anti-drop is effectual more. Although the eccentric locking nut has the advantage of no substitution in usability, the eccentric locking nut is double-nut after all, when the eccentric locking nut is installed and used, workers need to install the lower eccentric nut in place and then install the upper locking nut, the installation efficiency of the workers is low, the labor intensity is high, the situation that the locking nut falls or is installed reversely is easy to occur, particularly in some high-altitude operations or in occasions with dark and narrow conditions, the installation is more time-consuming and labor-consuming, and therefore a new technical scheme is provided for solving the problems.
Disclosure of Invention
The utility model aims at solving the technical problem and providing an eccentric locknut.
In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is: the utility model provides an eccentric locknut, includes the nut body, its characterized in that: the nut body is axially provided with a through threaded hole, a tool withdrawal groove is radially arranged, the upper end thread of the tool withdrawal groove is set as a first thread, and the lower end thread of the tool withdrawal groove is set as a second thread; the central axis of the first thread is not concentric with the central axis of the nut body, and the central axis of the second thread is concentric with the central axis of the nut body; the central axis of the first thread and the central axis of the second thread are provided with an eccentric distance e.
Preferably: the eccentric distance e is set to be 0.08-0.18 times of the thread pitch of the internal thread of the eccentric locknut.
Preferably: the first screwing length is 1/3-1/4 times of the screwing length of the nut body.
Compared with the traditional structure, the beneficial effects of the utility model are that:
1. the utility model is of an integral structure, convenient production and processing, reliable performance, improved installation efficiency of workers and reduced labor intensity;
2. the utility model discloses simple structure, simple to operate because eccentric lock nut's eccentric settings, the nut body produces inward radial locking force to connecting bolt, has increased substantially locking effect.
Drawings
FIG. 1 is a schematic front view of the present invention;
in the figure: 1. the nut comprises a nut body, 2 parts of first threads, 3 parts of tool withdrawal grooves and 4 parts of second threads.
Detailed Description
The present invention will be further explained below.
Referring to the attached drawings, the utility model relates to an eccentric locknut, including nut body 1, its characterized in that: the nut body 1 is axially provided with a through threaded hole, a tool withdrawal groove 3 is radially arranged, the upper end thread of the tool withdrawal groove 3 is set as a first thread 2, and the lower end thread of the tool withdrawal groove 3 is set as a second thread 4; the central axis of the first thread 2 is not concentric with the central axis of the nut body 1, and the central axis of the second thread 4 is concentric with the central axis of the nut body 1; the central axis of the first thread 2 is provided with an eccentric distance e from the central axis of the second thread 4.
In the preferred embodiment, the eccentric distance e is set to be 0.08-0.18 times of the thread pitch of the internal thread of the eccentric locknut.
In the preferred embodiment, the screwing length of the first thread 2 is 1/3-1/4 times of that of the nut body 1.
During the concrete implementation, when eccentric locknut and bolt were screwed up each other, the bolt was earlier through eccentric locknut second screw, and the prong and the second screw thread of bolt agree with, when screwing up to first screw, because the central axis at first screw place and the central axis at second screw place are eccentric, the nut body produces inside radial locking force to connecting bolt, and first screw produces elastic deformation locking bolt, reaches locking effect.
The above embodiments of the present invention are only examples for clearly illustrating the present invention, but not for limiting the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (3)
1. The utility model provides an eccentric locknut, includes nut body (1), its characterized in that: the nut body (1) is axially provided with a through threaded hole, the radial direction of the nut body is provided with a tool withdrawal groove (3), the upper end thread of the tool withdrawal groove (3) is provided with a first thread (2), and the lower end thread of the tool withdrawal groove (3) is provided with a second thread (4); the central axis of the first thread (2) is not concentric with the central axis of the nut body (1), and the central axis of the second thread (4) is concentric with the central axis of the nut body (1); the central axis of the first thread (2) and the central axis of the second thread (4) are provided with an eccentric distance e.
2. The eccentric locknut of claim 1, wherein: the eccentric distance e is set to be 0.08-0.18 times of the thread pitch of the internal thread of the eccentric locknut.
3. The eccentric locknut of claim 1, wherein: the screwing length of the first threads (2) is 1/3-1/4 times of that of the nut body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120720052.1U CN214837711U (en) | 2021-04-09 | 2021-04-09 | Eccentric locknut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120720052.1U CN214837711U (en) | 2021-04-09 | 2021-04-09 | Eccentric locknut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837711U true CN214837711U (en) | 2021-11-23 |
Family
ID=78762847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120720052.1U Active CN214837711U (en) | 2021-04-09 | 2021-04-09 | Eccentric locknut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214837711U (en) |
-
2021
- 2021-04-09 CN CN202120720052.1U patent/CN214837711U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |