Combined anti-loosening fastener

Abstract

The invention discloses a combined anti-loosening fastener, and relates to the technical field of fasteners. The fastener comprises a bolt, a nut and an anti-loosening washer; the upper end surface of the anti-loosening washer is coaxially and fixedly connected with a ratchet wheel, the outer diameter of the ratchet wheel is smaller than that of the anti-loosening washer, radial wedge-shaped teeth are annularly arranged on the lower end surface of the anti-loosening washer, the orientation direction of the side end surfaces of the wedge-shaped teeth is consistent with the unscrewing direction of the nut, the bottom end of the nut is fixedly connected with a female cover, the female cover can cover the ratchet wheel, the bottom end of the female cover can be pressed on the upper end surface of the anti-loosening washer, a plurality of pawls matched with the ratchet wheel are arranged on the side wall of the female cover, and one end of the rod part of the bolt can sequentially penetrate through a workpiece, the anti-loosening washer, the ratchet wheel, the female cover and the nut to be connected with the workpiece in a fastened mode. When being used for fixing an object, the anti-loosening fastener can effectively prevent loosening, and is convenient to assemble and relatively low in machining difficulty.

Description

technical field [0001] The invention relates to the technical field of fasteners, in particular to a combined anti-loosening fastener. Background technique [0002] The existing fasteners use traditional structures such as bolts, nuts and washers. The fastening principle is that the bolts are inserted into the connectors, and the nuts are tightened and fixed, or springs, washers and other accessories are added to prevent Bolts and nuts are loose, which has the advantages of simple structure, low cost, and good fastening effect under normal circumstances, but it is prone to loosening after long-term use, thereby posing potential safety hazards. In some special environments, such as vibration environments, strong sports environments, equipment with high assembly requirements, and other special environments, the self-locking ability of bolts and threads is not enough to maintain the stability of fasteners. [0003] Chinese patent CN101173693 provides a kind of anti-loosening w...

AI Technical Summary

Problems solved by technology

[0002] The existing fasteners use traditional structures such as bolts, nuts and washers. The fastening principle is that the bolts are inserted into the connectors, and the nuts are tightened and fixed, or springs, washers and other accessories are added to prevent Bolts and nuts are loose, which has the advantages of simple structure, low cost, and good fastening effect under normal circumstances, but it is prone to loosening after long-term use, thus posing safety hazards

In some special environments, such as vibration environments, strong sports environments, equipment with high assembly requirements, and other special environments, the self-locking ability of bolts and threads is not enough to maintain the stability of fasteners

[0003] Chinese patent CN101173693 provides a kind of anti-loosening washer and anti-loosening fastening assembly, and it presses the anti-loosening washer on the object by using bolts, so that the two sides of the anti-loosening washer are respectively matched with the object and the wedge-shaped teeth at the bottom of the bolt head. Increase the friction resistance, but the structure of the anti-loosening washer is more complicated, it is more difficult to produce in batches, and it is also more difficult to process wedge-shaped teeth directly on the bottom surface of the bolt head. The requirements for the corresponding production equipment are also correspondingly high, which has to consume a large cost; in addition, during the installation process, the wedge-shaped teeth at the bottom of the bolt head actually abut against the anti-loosening parts on the anti-loosening washer. To a certain extent, it will make it difficult to rotate the bolts, which increases the difficulty of assembly; what's more, this structure does not consider the disassembly of the fastening components. Form a fit, which eventually makes it difficult to disassemble, causing greater trouble

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