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Displacement friction internal expansion lock bolt

A technology for preventing loosening of bolts and internal expansion, applied in the direction of bolts, screws, nuts, etc.

Inactive Publication Date: 2014-12-17
XIANGYANG SHUNYING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, various forms of anti-loosening bolts appeared on the market, but there were various problems in different degrees, which seriously affected the service life of the machine, machine safety and personal safety.

Method used

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  • Displacement friction internal expansion lock bolt
  • Displacement friction internal expansion lock bolt
  • Displacement friction internal expansion lock bolt

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Embodiment Construction

[0015] Such as Figure 1 to Figure 4 shown. The displacement friction internal expansion anti-loosening bolt of the present invention is composed of a bolt main body 1 , an expansion core 3 and a locking pull rod 2 . Bolt body 1 is a new type of bolt body, its external shape and thread are the same as the national standard bolt body, but the axial direction is a through hole. A part of the cavity of the through hole cooperates with the locking rod 2 , and the part of the through hole corresponding to the thread head of the other part is a tapered expansion hole and cooperates with the expansion core 3 . The non-thread head port of the through hole of the bolt main body 1 is provided with a cylindrical groove, and the corresponding end of the locking rod 2 is provided with a matching cylindrical boss. The axis of the expansion core 3 is provided with a threaded hole, and the threaded hole is matched with the threaded section of the locking pull rod 2 . The outer end surface ...

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Abstract

The invention relates to a displacement friction internal expansion lock bolt, belonging to the field of a fastener of a high-speed moving machine, and mainly aiming at solving the problems of quality and safety caused by looseness of the fastener of the high-speed moving machine. The displacement friction internal expansion lock bolt is characterized in that the lock bolt comprises a bolt main body, a locking pull rod and an expending core, wherein the thread head part of a central through hole of the bolt main body is a tapered expanding hole, and the rest part of the central through hole of the bolt main body is matched with the locking pull rod; a cylindrical groove is formed in a non-thread head port of the central through hole of the bolt main body; the corresponding end of the locking pull rod is provided with a matched cylindrical boss; the axis of the expending core is provided with a threaded hole; the threaded hole is matched with the thread section of the locking pull rod; the expending core is arranged in the tapered expanding hole; the surface of the outer end of the expending core is an arc-shaped friction surface matched with an internal conical surface of the tapered expanding hole. The displacement friction internal expansion lock bolt has the characteristics of being capable of locking, and being good in locking effect, safe and reliable as well as long in service life, and is mainly used for various high-speed moving machines and high-speed vibration working environments.

Description

technical field [0001] The invention belongs to the technical field of high-speed motion mechanical fasteners. Specifically relates to a kind of anti-loosening bolt used in high-speed moving machinery such as trains, train chassis, ships, agricultural machinery and mining machinery, and high-speed vibration working environment, which is an ideal product for preventing mechanical accidents and personal safety. Background technique [0002] With the rapid development of China's manufacturing industry, the unprecedented demand for high-speed railway construction, mining machinery, and agricultural machinery has made the problems of anti-loosening and anti-loosening of high-speed moving machinery and high-speed vibration more prominent. In the past, various forms of anti-loosening bolts appeared on the market, but there were various problems in varying degrees, which seriously affected the service life of the machine, machine safety and personal safety. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B39/284F16B35/00
Inventor 李明江李佳胜
Owner XIANGYANG SHUNYING MACHINERY
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