Self-locking spiral thread fastener

Abstract

The invention relates to the technical field of fasteners, and discloses a self-locking spiral thread fastener which comprises a bolt, a gasket and a nut, the gasket is connected to the bolt in a sleeving mode, the nut is in threaded connection with the bolt, and a fastening mechanism for a self-locking spiral line is arranged at the lower end of the nut. The fastening mechanism comprises a cylindrical sleeve, a clamping block, a connecting spring, a shifting block, a metal clamping rod, an annular baffle, an extrusion bag, a sealing bag and annular rubber. The cylindrical sleeve is fixedly installed at the lower end of the nut. Through extrusion of the clamping block, the nut and the bolt are more tightly fixed, the situation that the bolt and the nut are loosened due to shaking of a ship body is effectively prevented, the purpose of automatic locking is achieved, a device, fixed by the bolt and the nut, on a huge wheel is firmer, and the danger occurrence probability is reduced; and through the expandable sealing bag, damp air on the sea surface is effectively isolated, the degree of thread rusting at the matched position of the bolt and the nut is reduced, and the bolt and the nut are prevented from being stuck.

Description

technical field [0001] The invention relates to the technical field of fasteners, in particular to a self-locking helical threaded fastener. Background technique [0002] A threaded fastener is a mechanical part with internal or external threads, and is generally used as a fastener to facilitate the combination of multiple components. The most common threaded fasteners are screws, nuts and bolts. [0003] Therefore, bolts and nuts are often used in many mechanical connection parts, and bolts and nuts are used on the giant wheel, but the weather at sea is changeable, and in bad weather, the waves hit the giant wheel directly, causing the giant wheel to shake. It is easy to loosen the cooperation between the bolts and nuts on the giant wheel, and the loosened bolts and nuts will easily cause unexpected consequences on the giant wheel without frequent maintenance. Therefore, a self-locking helical threaded fastener is needed. Contents of the invention [0004] The object of...

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Problems solved by technology

[0003] Therefore, bolts and nuts are often used in many mechanical connection parts, and bolts and nuts are used on the giant wheel, but the weather at sea is changeable, and in bad weather, the waves hit the giant wheel directly, causing the giant wheel to shake. It is easy to loosen the fit between the bolts and nuts on the giant wheel, and the loosened bolts and nuts are likely to cause unexpected consequences on the giant wheel without frequent maintenance, so a self-locking helical threaded fastener is needed

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