Anti-loosening double-nut connecting structure

Abstract

The invention discloses an anti-loosening double-nut connecting structure. The anti-loosening double-nut connecting structure comprises a nut assembly and a bolt. The nut assembly comprises a main nut, an auxiliary nut and an elastic non-return screw ring. The main nut is connected with the bolt through a thread structure; in the axis direction, the elastic non-return screw ring is coaxially and fixedly connected with the main nut; the outer wall of the elastic non-return screw ring is provided with an external thread and an external conical surface, and the inner wall of the elastic non-return screw ring is provided with a thread structure connected with the bolt; a plurality of partition holes are formed in the elastic non-return screw ring in the circumferential direction, and a petal-shaped locking part is formed between every two adjacent partition holes; an inner cavity of the auxiliary nut is provided with an inner thread used for being matched with the outer thread of the elastic non-return screw ring and an inner conical face used for being in interference fit with the outer conical face of the elastic non-return screw ring. According to the anti-loosening double-nut connecting structure, the auxiliary nut is prevented from rotating through the elastic non-return structure, connection is reliable, installation is easy, the fastener can be repeatedly used, the machining cost is proper, and the anti-loosening effect is good.

Description

technical field [0001] The invention relates to a bolt connection structure, in particular to an anti-loose double nut connection structure. Background technique [0002] The bolt connection structure has the advantages of simple installation, convenient disassembly, low cost and high interchangeability, and is widely used in many industries in the industrial field. However, during the use of the bolted connection structure, due to vibration, shock, temperature change or other reasons, the applied pre-tightening force will gradually become smaller or even disappear with the increase of use time, resulting in the loosening of the bolted connection structure. . At the same time, some bolted structures are inevitably subjected to tension. [0003] For example, the application publication number is CN111894145 A. The invention application discloses a double-section high-strength bolt anti-loosening connection node for a spatial grid structure and a construction method thereof,...

AI Technical Summary

Problems solved by technology

When the structure is subjected to tension, the lock washer may be disengaged from the connecting piece at the end of the rod, and the pre-tightening force applied between the lock washer and the connected part by rotating the nut may be reduced due to the tension on the bolt. Small or even disappear, resulting in poor anti-loosening effect or even failure

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