Double tooth variation type double anti-loose nut

Abstract

A bivariate tooth type double anti-loose nut belongs to technology field of anti-loose nut. The bivariate tooth type double anti-loose nut changes single inclined plane to double inclined plane, and includes 6g-9g bolt, basic tooth type angle 60 degree, the upper two anti-loose inclined plane is 30degree included angle with axes, two bevel included angle are 120, tooth top is crossing point of two inclined plane, thereby bivariate tooth type anti-loose nut with plain nut shape can be produced without distinguishing orientation in using. Extending chamfer angle at nut end-face screw thread of flange surface, leaving little surface at flange surface, forming cantalever applied force on flange surface, using steels elastic to enhance anti-loose performance.

Description

technical field [0001] The invention relates to a tooth-variable anti-loosening nut, which is a device for preventing the thread pair from loosening by changing the thread angle of the nut. It belongs to the technical field of lock nuts. Background technique [0002] Lock nuts are new types of nuts that have only appeared in recent years. There are many forms: national standard GB / T889.1-2000I non-metallic insert hexagonal lock nuts; there are also embedded steel sheet nuts on the market; . These nuts are complicated to manufacture and inconvenient to install and use. Special tools must be used for the installation and removal of the embedded wire nuts. The variable-tooth locknut was declassified by the U.S. military in 1996 and is an expired patented technology. At present, there are existing standards in China: iron standard (TB / T3019-2001). The current variable-tooth locknut has an advantage: the advantage is that it has good anti-loosening performance; several disadv...

AI Technical Summary

Problems solved by technology

Therefore, it must be made into a flange shape to show the direction, which increases the complexity of the process.

It is suitable for: flange nuts, cap nuts, wing nuts, combined cap nuts, ring nuts, etc. These nuts are used in a small amount, and are not suitable for ordinary hexagonal nuts that are used in a large amount, because they The direction cannot be distinguished; second, because it is originally an ordinary nut and emphasizes the middle diameter, its anti-loosening slope is relatively short. In the connection pair, the anti-loosening slope cannot fully accommodate the 6g bolt: that is, the internal thread is close to the upper limit area, and the external thread When approaching the lower limit area, the crest of the external thread cannot touch the anti-loosening slope. At this time, the variable-profile nut is the same as the ordinary nut, and has no anti-loosening performance.

Moreover, it is impossible to be found during assembly, and if there is a problem in use, the meaning of using locknuts will be lost; if the internal thread is close to the lower limit area and the external thread is close to the upper limit area, theoretically speaking, the bolt cannot fit into the nut.

Third, because the length of its anti-loosening slope is limited, the specifications of variable-tooth locknuts have a certain range, M6--M42. For variable-tooth-type locknuts that are smaller than M6 and larger than M36, many problems arise, and it is difficult to Use; Fourth, the variable-tooth locknut has specific requirements for the outer diameter of the bolt that matches it, see the iron standard for details

Once used wrongly, it will not be anti-loose

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