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Lock bolt and nut assembly, bolt and nut

A technology of anti-loosening bolts and bolts, which is applied in the direction of nuts, bolts, threaded fasteners, etc., can solve the problems of HardLock nut processing technology difficulty, low reuse rate, bolt load deviation, etc., and achieve less difficulty in thread processing technology , High reuse rate, low production cost

Inactive Publication Date: 2021-07-20
张俊岳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The processing technology of Japanese Hard Lock nuts is difficult, and the production cost is high. It is easy to cause the load deviation of the bolts and damage the bolt threads when used in severe vibration conditions.

Method used

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  • Lock bolt and nut assembly, bolt and nut
  • Lock bolt and nut assembly, bolt and nut
  • Lock bolt and nut assembly, bolt and nut

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, a bolt. figure 1 is its front view. There are two different threads on the bolt. The inner diameter of the inner thread of the bolt is greater than or equal to the outer diameter of the outer thread. The inner thread of the bolt is right-handed or left-handed. The direction of rotation of the outer thread of the bolt is opposite to that of the inner thread. Used for the lock bolt nut assembly.

Embodiment 2

[0024] Embodiment 2, a nut. figure 2 is its top view, image 3 yes figure 2 The I--I sectional view. There is an annular protrusion (1) at one end of the nut, and the annular protrusion (1) can be regarded as a fixed washer on one end of the nut, and the nut is specially used for the anti-loosening bolt and nut assembly.

Embodiment 3

[0025] Embodiment 3, the first embodiment of an anti-loosening bolt and nut assembly. Figure 4 is its longitudinal section. An anti-loosening bolt and nut assembly is composed of a bolt (2), a fastening nut (3) and a lock nut (4); the bolt (2) has two different threads, and the inner diameter of the inner thread of the bolt (2) is larger than or Equal to the outer diameter of the outer thread, the inner thread of the bolt (2) is right-handed or left-handed, and the direction of rotation of the outer thread of the bolt (2) is opposite to that of the inner thread; the tightening nut (3) matches the inner thread of the bolt , can be screwed into the inner thread of the bolt first; the lock nut (4) matches the outer thread of the bolt, and can be screwed into the outer thread of the bolt later; both the lock nut (3) and the end of the lock nut (4) have annular protrusions The ring-shaped protrusion (1) can be regarded as a fixed washer on one end of the nut. The inner diameter o...

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Abstract

The invention discloses a lock bolt and nut assembly and a bolt and a nut in the assembly. The assembly is composed of a bolt (2), a fastening nut (3) and a locking nut (4). The bolt (2) is provided with two sections of threads, the inner diameter of the inner threads of the bolt (2) is larger than or equal to the outer diameter of the outer threads, and the screwing direction of the outer threads of the bolt (2) is opposite to that of the inner threads. The fastening nut (3) is matched with the inner threads of the bolt. The locking nut (4) is matched with the outer threads of the bolt. One end of two or one of the fastening nut (3) and the locking nut (4) is provided with a bulge, and the bulge can ensure that the two nuts are screwed together on the bolt. During use, the fastening nut (3) is pre-tightened, and then the locking nut (4) is pre-tightened. Under vibration, the loosening direction of the fastening nut (3) is the tightening direction of the locking nut (4), and tightening of the locking nut prevents loosening of the fastening nut. The assembly is simple in structure, easy to machine, low in cost, high in strength and high in repeated utilization rate, and the threads of the assembly are not prone to damage.

Description

technical field [0001] The invention relates to the technical field of anti-loosening threads, in particular to an anti-loosening bolt and nut assembly, a bolt and a nut. Background technique [0002] At present, among the threaded connection anti-loosening technologies, there are China's Tang's thread anti-loosening and Japan's Hard Lock nut anti-loosening. [0003] Down thread has the characteristics of both left-handed and right-handed threads. When connecting, use two nuts with different rotation directions: the nut on the working bearing surface is called the fastening nut, and the nut on the non-supporting surface is called the lock nut. When in use, the fastening nut is pre-tightened first, and then the lock nut is pre-tightened. In the case of vibration and impact, the fastening nut will tend to loosen. However, since the loosening and retreating direction of the fastening nut is the tightening direction of the locking nut, the tightening of the locking nut just pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B39/16F16B37/00F16B35/04F16B35/00F16B33/02
CPCF16B39/16F16B37/00F16B35/041F16B35/00F16B33/02F16B2033/025
Inventor 张俊岳
Owner 张俊岳