Locking bolt/nut

A technology for preventing loosening of bolts and nuts, applied in the directions of bolts, nuts, screws, etc., can solve problems such as bolt loosening, and achieve the effects of enhanced locking force, convenient operation and simple structure

Pending Publication Date: 2020-04-10
DAYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of anti-loosening bolt and nut, with its own anti-loosening permanent self-locking structure, so as to at least solve the problem of alternate strain and bolt loosening caused by the anti-loosening structure of traditional double-nut bolts due to external disturbance factors such as alternating loads or vibrations. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] like Figure 1~2 As shown, the present embodiment provides an anti-loosening bolt and nut, including a bolt 1, a first nut 3 and a second nut 4, the bolt 1 includes a fixed end 101 and a screw rod 102, and the screw rod 102 is provided with a first thread 1021 and a second screw thread 102. Thread 1022, the first thread 1021 and the second thread 1022 have opposite screw rotation directions; the screw rod 102 penetrates into the connected part 2, and is screwed into the first nut 3 and the second nut 4 in turn to make the connected part 2 close to the The fixed end 101; the first nut 3 has an inner thread that matches the first thread 1021, and the first nut 3 is connected with the first thread 1021 on the screw rod 102; the second nut 4 has an inner thread that matches the second thread 1022 thread, the second nut 4 is coupled with the second thread 1022 on the screw rod 102; the nominal diameter of the first thread 1021 is larger than the nominal diameter of the secon...

Embodiment 2

[0050] This embodiment provides an anti-loosening bolt and nut, including a bolt 1, a first nut 3 and a second nut 4, the bolt 1 includes a fixed end 101 and a screw rod 102, and the screw rod 102 is provided with a first thread 1021 and a second thread 1022, The screw rotation direction of the first thread 1021 and the second thread 1022 are set in opposite directions; the screw rod 102 penetrates into the connected part 2, and is screwed into the first nut 3 and the second nut 4 in turn to make the connected part 2 close to the fixed end 101 ; The first nut 3 has an internal thread that cooperates with the first thread 1021, and the first nut 3 is connected with the first thread 1021 on the screw rod 102; the second nut 4 has an internal thread that cooperates with the second thread 1022, and the second The nut 4 is coupled with the second thread 1022 on the screw rod 102 ; the nominal diameter of the first thread 1021 is larger than the nominal diameter of the second thread ...

Embodiment 3

[0060] This embodiment provides an anti-loosening bolt and nut, including a bolt 1, a first nut 3 and a second nut 4, the bolt 1 includes a fixed end 101 and a screw rod 102, and the screw rod 102 is provided with a first thread 1021 and a second thread 1022, The screw rotation direction of the first thread 1021 and the second thread 1022 are set in opposite directions; the screw rod 102 penetrates into the connected part 2, and is screwed into the first nut 3 and the second nut 4 in turn to make the connected part 2 close to the fixed end 101 ; The first nut 3 has an internal thread that cooperates with the first thread 1021, and the first nut 3 is connected with the first thread 1021 on the screw rod 102; the second nut 4 has an internal thread that cooperates with the second thread 1022, and the second The nut 4 is coupled with the second thread 1022 on the screw rod 102 ; the nominal diameter of the first thread 1021 is larger than the nominal diameter of the second thread ...

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Abstract

The invention provides a locking bolt / nut. The locking bolt / nut comprises a bolt, a first nut and a second nut; the bolt comprises a fixed end and a screw rod; the screw rod is provided with a first thread and a second thread, and the rotating directions of the two threads are opposite; the screw rod is inserted in a connected piece, and is screwed in the first nut and the second nut in sequence to tightly bond the connected piece on the fixed end; the first nut is provided with an internal thread matched with the first thread; the second nut is provided with an internal thread matched with the second thread; and the nominal diameter of the first thread is larger than the nominal diameter of the second thread. The locking bolt / nut is simple in structure and convenient to operate; the step-shaped screw rod is provided with two nuts, with opposite rotating directions, for cooperation; inclined teeth are arranged at the connected ends of the two nuts; and the inclined teeth are engaged with each other, so that the bolt / nut is provided with a permanent self-locking structure, guarantees permanent, stable and firm bolt connection, and solves the problem of bolt looseness caused by alternate strain due to external disturbance factors of alternating load or equipment vibration.

Description

technical field [0001] The invention belongs to the technical field of mechanical fastening, and in particular relates to an anti-loosening bolt and nut. Background technique [0002] Threaded connection is currently the most commonly used connection method. One of the advantages of threaded connection over other connections is that it is detachable and easy to maintain, but at the same time this is also its weakness, especially in trains, automobiles, airplanes and In large mechanical equipment such as tanks, there are countless vicious incidents of overturning, machine crashes and human deaths due to loosening, loosening and fatigue fracture of threaded connections. With the development of machinery to high speed and precision, industrial scale to large scale, automation and aerospace technology, etc., the problem of anti-loosening of threaded fastener connections has become more and more prominent. In general, the anti-vibration loosening life of fasteners is much lower ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B39/12F16B39/16F16B37/00F16B35/00
CPCF16B35/00F16B37/00F16B39/12F16B39/16
Inventor 魏昊王成王思成丁军
Owner DAYE SPECIAL STEEL CO LTD
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