Fastener locking structure for automobile

Abstract

The invention discloses a fastener locking structure for an automobile, which comprises a bolt, a nut and a force fit piece. The force fit piece is firmly connected to an automobile body component of the automobile through the bolt and the nut; the end face of the nut, jointed with the force fit piece, is designed to be a flange surface on which at least one anti-rotation boss is arranged; correspondingly, an anti-rotation groove is arranged on a fit surface, contacted with the nut, of the force fit piece and is matched with the anti-rotation boss; and the anti-rotation boss of the nut flange surface falls into the anti-rotation groove of the force fit piece. Since the anti-rotation boss is arranged on a flange compression surface of the nut and the end face of the force fit piece is provided with the anti-rotation groove which is matched with the force fit piece, a fastener locking function can be realized effectively, the phenomenon of a loose fastening nut of a thick plate piece of the automobile is solved and abnormal sound of the automobile body produced due to loosening of the fastening is avoided.

Description

technical field [0001] The invention relates to fastener technology, in particular to nut fasteners. Background technique [0002] The connection method of thick metal plate parts of automobile chassis is generally connected by fasteners. The traditional fastener connection is a combination of bolts and nuts, which are self-locking through the friction between the bolts and nuts. However, in the long-term vibration process, the self-locking ability will be reduced due to the reduction of friction force, resulting in loosening of the connected parts and abnormal noise. [0003] In view of this, a variety of anti-loosening nut structures have appeared in the prior art, and they mainly achieve the purpose of anti-loosening by designing a conical contact surface with serrations on the nut. There is another anti-loosening nut reported in Chinese patent ZL200820239430.9. The anti-loosening nut adopts a triangular anti-rotation boss. Although the nut has an anti-loosening effect,...

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Problems solved by technology

There is another anti-loosening nut reported in Chinese patent ZL200820239430.9. The anti-loosening nut adopts a triangular anti-rotation boss. Although the nut has an anti-loosening effect, the triangular anti-rotation boss is easy to be damaged during long-term vibration. Compress the end face to reduce the anti-loosening effect, and the anti-loosening structure cannot be reused, and the manufacturing process of the triangular anti-rotation boss is complicated and the production cost is high

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