Self-tightening bolt and nut tightening assembly

Abstract

The invention provides a self-tightening bolt and nut tightening assembly. The assembly comprises a bolt, and an upper nut, a self-tightening nut, a lower nut, a self-locking gasket and an end nut which are in connecting fit in sequence. Long screw portions which are symmetrically arranged in the diameter direction are arranged on a screw stem. The upper nut and the lower nut are each provided with a circular truncated cone shaped hole. The self-tightening nut comprises two circular truncated cone shaped columns matched with the circular truncated cone shaped holes of the upper nut and the lower nut correspondingly, and further comprises a radial staggered through gap. The self-locking gasket comprises elastic narrow curved surface clamping spine portions symmetrically arranged in the diameter direction and end surface radial wedge-shaped oblique toothed convex grooves matched with the end nut. When under axial pressure, the clamping spine portions deform and stretch and can block thelong groove portions of the screw stem portion of the bolt; and the end nut end surface is provided with wedge-shaped oblique toothed concave grooves in the radial direction, the wedge-shaped obliquetoothed concave grooves can be engaged with the wedge-shaped oblique toothed convex grooves of the self-locking gasket mutually, the screwing-out direction of the end nut is the same as the directionof engaging between the wedge-shaped oblique toothed concave grooves of the end nut and the wedge-shaped oblique toothed convex grooves of the self-locking gasket, and damping and locking effects areachieved.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a self-tightening bolt and nut fastening assembly. Background technique [0002] In the modern industrial field, products such as nuts and bolts are widely used to lock structural parts, but at the same time we will also find that in many cases, especially under vibration and shock, it is very easy to cause bolts in the fastening structure 1. The thread slopes between the nuts slide against each other, causing the bolts and nuts to loosen in the direction of loosening, resulting in structural dislocation. [0003] In view of the above situation, in actual operation, people use various methods to fasten the locked nuts and bolts, such as using super glue, electric welding, secondary reinforcement through perforation, etc., but there is still no way to fundamentally solve the problem of nuts and bolts. The phenomenon of loosening and moving. Contents of the invention [0004] In order to...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems that the bolt and nut fastening assembly in the prior art is prone to loosening and displacement under vibration, the present invention discloses a self-tightening bolt and nut fastening assembly, which includes bolts and upper nuts that are sequentially connected and matched, self-tightening Nuts, lower nuts, self-locking washers, end nuts; bolts are hexagonal head bolts, including head and screw rod, and the screw rod has long grooves arranged symmetrically in the diameter direction; upper nuts, self-tightening nuts, lower nuts, and end nuts are hexagonal block, the center hole has an internal thread, and the central aperture and internal thread are matched with the screw rod and external thread of the bolt; the upper nut and the lower nut respectively include a round table hole; the self-tightening nut includes two round table holes that match the upper nut and the lower nut. Round table column, and the self-tightening nut also includes a radial dislocation through gap; the self-locking washer has a central hole, and the aperture matches the diameter of the screw rod of the bolt and the aperture of the upper nut, self-locking nut, and lower nut. The self-locking washer includes a diameter The elastic narrow curved ratchet part arranged symmetrically in the direction and the end face matched with the end nut have wedge-shaped helical tooth convex grooves in the radial direction. When the ratchet part is subjected to axial pressure, the ratchet part deforms and extends to block the rod of the bolt The long groove part; the end nut is connected to the end of the screw rod of the bolt. The end nut includes a semicircular end and a hexagonal block. There is a wedge-shaped helical groove in the radial direction on the end surface of the end nut. The wedge-shaped helical-toothed convex grooves of the wedge-shaped helical teeth engage with each other, and the screw-out direction of the end nut is the same as that of the wedge-shaped helical-toothed convex grooves of the end nut and the self-locking washer.

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