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Lock thread

A thread and anti-loosening technology, applied in the direction of threaded fasteners, screws, nuts, etc., can solve the problems of weakened anti-loosening ability, insufficient space, and reduced interference, and achieve good anti-loosening performance, high reliability, and prevent The effect of loose threaded connections

Active Publication Date: 2019-02-22
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has the following problems: the contact between the male tooth and the female tooth is actually a 30-degree wedge-angle line contact, the area is small, the pressure is strong, and the requirements for the compressive strength of the material are high; after multiple disassembly, the interference is reduced and the anti-loosening ability is weakened
The cost of two nuts will also be higher, the structure is not compact enough, and in some occasions there is not enough space, only one nut is allowed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, an anti-loosening thread 1 includes thread teeth. The tooth profile angle of the anti-loosening thread 1 is α, 45°<α<60°. The first sub-teeth 11 and the second sub-teeth 12 are formed by dividing, and the first sub-teeth 11 and the second sub-teeth 12 can be elastically deformed toward the direction of the groove 2 when pressed. After adopting this structure, the pitch diameter of the teeth of the anti-loosening thread 1 is larger than that of the standard thread. Since the thread teeth of the anti-loosening thread 1 are divided into the first sub-teeth 11 and the second sub-teeth 12 by the groove 2, so When the standard thread and the anti-loosening thread 1 are used for screw connection, the first sub-teeth 11 and the second sub-teeth 12 of the anti-loosening thread 1 are squeezed by the standard thread teeth, and then elastically deform in the direction of the groove 2, and the first sub-teeth The elastic forces F1 and F2 produced by the e...

Embodiment 2

[0042] The main structure of this embodiment is the same as that of Embodiment 1, and the similarities will not be repeated here. The difference is that: Figure 5 As shown, the groove 2 includes a first groove 21 and a second groove 22 , and the third child tooth 13 is arranged between the first groove 21 and the second groove 22 . After adopting this structure, when the standard thread and the anti-loosening thread 1 are used for screw connection, the first sub-teeth 11, the second sub-teeth 12 and the third sub-teeth 13 of the anti-loosening thread 1 are squeezed by the standard thread teeth, and then Elastically deform toward the first groove 21 and the second groove 22, and the elastic force generated by the elastic deformation presses against the standard screw teeth, and the third sub-teeth 13 protrude from the first groove 21 and the second groove 22 and Tightly inserted into the standard thread, it acts as a wedge to effectively prevent the threaded connection from lo...

Embodiment 3

[0046] The main structure of this embodiment is the same as that of Embodiment 2, and the similarities will not be repeated here. The difference is that: Figure 6 As shown, the elastic material 3 is provided inside the first groove 21 and the second groove 22 . When the first sub-teeth 11, the second sub-teeth 12 and the third sub-teeth 13 are pressed by the standard thread teeth, and then elastically deform in the direction of the first groove 21 and the second groove 22, the first groove 21 and the second groove 22 The elastic material 3 inside the second groove 22 is also elastically deformed by extrusion, and the elastic force generated by the elastic deformation pushes the first sub-teeth 11, the second sub-teeth 12 and the third sub-teeth 13 tightly, so that the first sub-teeth 11 1. The second sub-teeth 12 and the third sub-teeth 13 tightly press the standard thread teeth to prevent the threaded connection from loosening and enhance the anti-loosening performance.

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Abstract

The invention relates to the technical field of mechanical connection, in particular to a lock thread. The lock thread comprises a thread tooth, and the thread angle of the lock thread is alpha. The top of the thread tooth is concaved downwards to form a groove, and the thread tooth is divided by the groove into a first auxiliary tooth and a second auxiliary tooth, wherein the first auxiliary tooth and the second auxiliary tooth can generate elastic deformation towards the groove when being extruded. After the structure is adopted, the tooth middle diameter of the lock thread is larger than the tooth middle diameter of a standard thread, due to the fact that the thread tooth of the lock thread is divided by the groove into the first auxiliary tooth and the second auxiliary tooth, when thestandard thread and the lock thread are used for threaded connection, the first auxiliary tooth and the second auxiliary tooth of the lock thread are extruded by a standard thread tooth and are elastically deformed towards the groove, elastic force generated by elastic deformation of the first auxiliary tooth and the second auxiliary tooth presses the standard thread tooth from two contact faces,thread connection loosening is effectively prevented, the lock performance is good, and reliability is high.

Description

technical field [0001] The invention relates to the technical field of mechanical connection, in particular to an anti-loosening thread. Background technique [0002] In the thread fastening connection, lock pieces, pins, torque lock nuts, nylon inserts, fuses or chemical glue bonding methods are often used to solve the problem of thread loosening. . These measures have delayed the time for fasteners to loosen by themselves to a certain extent, but they have not fundamentally solved the problem. [0003] 1. American Spiralock (spiralock) thread anti-loosening thread: Spiralock's thread shape has a unique 30-degree wedge-shaped slope on its tooth root. When a Spirax nut is assembled, the crest of the external thread rests tightly on the 30-degree wedge of the Spirax thread, preventing any lateral movement of the thread relative to the female thread. However, it has the following problems: the contact between the male tooth and the female tooth is actually a 30-degree wedge...

Claims

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Application Information

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IPC IPC(8): F16B39/30
CPCF16B39/30
Inventor 朱派龙赵战峰潘朝吴峥强
Owner GUANGDONG IND TECHN COLLEGE
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