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Lock bolt for groove

A technology for anti-loosening bolts and bolts, applied in the direction of bolts, screws, nuts, etc., can solve the problems of reduced anti-corrosion ability of nuts, reduced locking performance, and failure, so as to reduce the probability of dry friction and reduce the contact area , The effect of improving the ability of anti-moment

Inactive Publication Date: 2016-09-28
SHAANXI MAIKUN SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) The wear of the thread in the locking area of ​​the self-locking nut reduces the locking performance or even fails;
[0006] (4) After dry friction between the thread and the bolt in the locking area of ​​the self-locking nut, the nut thread is exposed to the metal body to reduce the corrosion resistance of the nut

Method used

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0032] Technical scheme of the present invention comprises self-locking nut and recessed bolt (as figure 2 (a) shown); the grooved bolt is based on the common bolt and uses a plane parallel to the bolt axis to cut off the tooth height of the bolt external thread part to form a groove, and the tooth height of the cut part is the basic tooth type The height is 2 / 3±5%, retaining the arc of the bolt tooth bottom, so that the bolt tooth bottom and the nut tooth top maintain the spiral guiding function, the groove width W=(1.5~2)×P, where P pitch, the distance between the groove and the bolt The distance of the hexagonal head is: the total thickness of the interlayer H 1 (Including the thickness of the washer) + nut height H - closing height h - (2 ~ 3) × P, and then the groove...

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PUM

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Abstract

The invention provides a groove anti-loosening bolt, which includes a head and a screw rod. The screw rod has an external thread, and the external thread part is evenly distributed with a number of grooves parallel to the axis of the bolt along the circumference of the bolt. The self-locking nut used for matching at least There is a shut-off that falls into said groove. When the invention is assembled, the contact area between the self-locking nut and the bolt thread is reduced, which can reduce friction, reduce the probability of dry friction, improve the ability of anti-reverse moment, and improve the product life; it has excellent anti-vibration performance and can be used in Guaranteed locking performance under strong vibration environment; can increase assembly speed; provide high, continuous and stable preload and improve fatigue strength; suitable for assembly in places where tools cannot be used.

Description

technical field [0001] The invention relates to an anti-loosening fastening connection device. Background technique [0002] At present, in the mechanical structure of aviation, aerospace and other fields, several laminate structures (including aluminum alloy 6061 or 7075, titanium alloy Ti6Al4V, carbon fiber composite material T700 / M21, etc.) are connected using closed self-locking nuts and ordinary bolts. See figure 1 , including a self-locking nut 3 and a common bolt 4, and a self-locking nut 3 and a common bolt 4 are used to connect the structural plate 1 and the structural plate 2. Apply the specified torque value to the bolt, so that the bolt is screwed into the self-locking nut and passes through the locking area, and the friction force at the engaging thread of the locking area makes the connected parts reach the specified pretightening force, so that the connected parts can achieve the purpose of connection . This common bolt connection has the following disadvan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/04F16B39/30
CPCF16B35/041F16B39/30
Inventor 杨富强
Owner SHAANXI MAIKUN SCI & TECH CO LTD
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