Double-thread lock bolt

A double thread and bolt technology, applied in bolts, threaded fasteners, screws, etc., can solve problems such as poor reliability and reduced anti-loosening effect.

Pending Publication Date: 2021-05-11
陈建军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-loosening solution with increased friction is not limited by space and can be disassembled repeatedly, but the reliability is poor. After a certain period of work, the anti-loosening effect will be reduced due to vibration and other reasons

Method used

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  • Double-thread lock bolt
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Embodiment Construction

[0030] The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention, but should not be construed as a limitation of the present invention. The accompanying drawings take right-handed hexagonal bolts and nuts, a single concave external thread, a single convex internal thread, and the tooth profile of the concave external thread and the convex internal thread is a rectangle as an example for illustration.

[0031] figure 1 Shown is a schematic diagram of the structure of a double-threaded anti-loosening bolt, including a double-threaded bolt 1 , a double-threaded concave nut 2 , and a double-threaded convex nut 3 .

[0032] figure 2 Shown is a schematic structural diagram of a double-threaded bolt 1 , and the threaded section of the double-threaded bolt 1 is provided with concave external threads 1-2. The lead angle of the concave external thread ...

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PUM

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Abstract

The invention discloses a double-thread lock bolt. The double-thread lock bolt is characterized by comprising a double-thread bolt body, a double-thread concave nut and a double-thread convex nut. A concave external thread is arranged on a thread section of the double-thread bolt body. The double-thread concave nut is provided with two sections of internal threads with different nominal diameters. A convex internal thread is arranged on the inner side of a central round hole of the double-thread convex nut, and an external thread is arranged on a boss portion of the double-thread convex nut. The double-thread convex nut and the double-thread concave nut are installed on a threaded section of the double-thread bolt, and a convex inner thread on the inner side of the double-thread convex nut is correspondingly screwed with a concave outer thread of the double-thread bolt body. A boss part external thread of the double-thread convex nut is correspondingly screwed with a large nominal diameter internal thread of the double-thread concave nut, and a small nominal diameter internal thread of the double-thread concave nut is correspondingly screwed with a thread of the double-thread bolt body. According to a locking method of the double-thread lock bolt, the pre-tightening force of the bolt can be effectively controlled within a constant and effective range, loosening of the bolt and the nut is prevented, and the state of the bolt and the state of the nut are locked.

Description

technical field [0001] The invention relates to the mechanical field, and is suitable for double-threaded anti-loosening bolts used to prevent bolt tightening failure due to loosening of fastener bolts due to vibration. Background technique [0002] Anti-loosening bolts are mainly used to control the loosening and failure of connecting parts operating under vibration conditions, especially for mechanical equipment such as mining machinery under vibration working conditions, it is necessary to take measures to prevent parts from loosening and affect the normal operation of mechanical connecting parts. The currently commonly used anti-loosening methods for fasteners generally include non-removable anti-loosening schemes and anti-loosening schemes that increase friction. The non-detachable anti-loosening solution uses methods such as welding, bonding or punching riveting to change the detachable threaded connection into a non-detachable threaded connection. In the non-removabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B39/18
CPCF16B39/18
Inventor 陈建军陈雨繁
Owner 陈建军
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