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Expansion lock bolt

An anti-loosening bolt and expansion technology, applied in the direction of bolts, screws, nuts, etc., can solve the problems of large working tension, unaffordable, unsuitable for long-term and repeated use of nylon materials, etc., to achieve easy firming process, flexible sliding, and stop Significant effect of dynamic anti-loosening effect

Inactive Publication Date: 2015-09-02
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nylon materials are not suitable for long-term and repeated use, and cannot bear large working tension

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: see Figure 1a , Figure 1b , Figure 1c and Figure 1d , the present embodiment is an expansion tube anti-loosening expansion bolt, which includes:

[0031] The main body bolt 1, its outer peripheral surface has an external thread structure that is threadedly matched with the internal thread hole of the workpiece, the main body bolt 1 has an internal thread hole 2 that penetrates axially, and the front section of the main body bolt 1 is set as an expansion joint that can expand radially Segment 4, the expansion segment 4 has a hollow expansion hole 5 passing through in the axial direction.

[0032] The stop bolt 3, the stop bolt 3 forms a thread fit with the internal thread hole 2 of the main body bolt 1 with its external thread, the rotation direction of the stop bolt 3 in the main body bolt 1 is the same as the rotation direction of the main body bolt 1 in the workpiece internal thread hole to the opposite direction.

[0033] The bolt front end of t...

Embodiment 2

[0036] Example 2: see Figure 2a , Figure 2b , Figure 2c Figure 2d and Figure 2e , this embodiment is a slider-type anti-loosening expansion bolt, which is the same as Embodiment 1, including:

[0037] The main body bolt 1, its outer peripheral surface has an external thread structure that is threadedly matched with the internal thread hole of the workpiece, the main body bolt 1 has an internal thread hole 2 that penetrates axially, and the front section of the main body bolt 1 is set as an expansion joint that can expand radially Segment 4, the expansion segment 4 has a hollow expansion hole 5 passing through in the axial direction.

[0038] The stop bolt 3, the stop bolt 3 forms a thread fit with the internal thread hole 2 of the main body bolt 1 with its external thread, the rotation direction of the stop bolt 3 in the main body bolt 1 is the same as the rotation direction of the main body bolt 1 in the workpiece internal thread hole to the opposite direction.

[...

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Abstract

The invention discloses an expansion lock bolt which is characterized by comprising a main bolt and a catch bolt. An external threaded structure which is matched with an internal threaded hole of a workpiece in a threaded manner is arranged on the outer circumferential surface of the main bolt, an axially through internal threaded hole is formed in the main bolt, a front section of the main bolt is an expansion section which can be radially expanded, and an axially through hollow expansion hole is formed in the expansion section; the catch bolt is matched with the internal threaded hole of the main bolt by external threads of the catch bolt in a threaded manner, the rotation direction of the catch bolt in the main bolt is opposite to the rotation direction of the main bolt in the internal threaded hole in the workpiece; a bolt front end of the catch bolt can deeply extend into the hollow expansion hole of the expansion section, so that the expansion section can be radially expanded and butted to the surface of the internal threaded hole of the workpiece. The expansion lock bolt has the advantages that loosening can be effectively prevented, the expansion lock bolt is easy to disassemble, and abrasion can be prevented.

Description

technical field [0001] The invention relates to a fastener, more specifically to a threaded connection for fastening. Background technique [0002] Ordinary bolt connections have certain self-locking properties, but in the process of vibration and in environments with large temperature changes, it is easy to cause bolts to loosen or even fall off, causing unnecessary losses. Whether it is made of metal or plastic parts, there is inevitably wear and tear during disassembly and assembly. Due to wear and tear, the fit gap between components is increased, and frequent disassembly and assembly may easily lead to scrapping of the connected parts due to excessive wear. [0003] The anti-loosening of threads in the prior art is generally provided with elastic washers, and the bottom end surface of the bolt is also set in a tooth shape to increase the friction between the end surface of the bolt and the assembly, but these methods cannot fundamentally solve the problem due to the thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B13/06F16B39/28
CPCF16B13/066F16B39/28
Inventor 郝超郝子瑞谢海杨莹束开金黄国兴
Owner HEFEI UNIV OF TECH
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