Corrosion-resistant internal thread type combined fastener

Abstract

The invention discloses a corrosion-resistant internal thread type combined fastener, and relates to the technical field of fasteners. A cylindrical cavity is formed in one end of an unthreaded fastening rod, a positioning assembly is slidably connected into the cylindrical cavity, and the positioning assembly is in threaded fit with the unthreaded fastening rod; the unthreaded fastening rod is sleeved with an elastic fastening mechanism, a locking assembly connected with the elastic fastening mechanism in a clamped mode is arranged in the cylindrical cavity, and the locking assembly is in threaded connection with the positioning assembly. The positioning assembly is arranged in the unthreaded fastening rod, and after the locking assembly is inserted into the unthreaded fastening rod, the inner thread structure in the hollow positioning column on the positioning assembly is matched with the outer thread structure on the locking assembly in a threaded mode; the elastic fastening mechanism connected with the locking assembly can be tightly attached to the surface of a connected piece, hidden connection of a threaded structure is achieved through a threaded connection mode in the hollow positioning column, and corrosion of the fastening piece can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of fasteners, in particular to a corrosion-resistant internal thread combination fastener. Background technique [0002] Traditional combined fasteners are composed of bolts and nuts, and the connection and fixation of the two connected parts are realized through the cooperation of bolts and nuts. The surface of the bolt is provided with an external thread structure, and the inside of the nut is provided with an internal thread structure. The positioning and fixing of the nut on the bolt is realized by thread fit. After a long period of use, the bolt is easily corroded due to the external thread structure, which affects the nut on the bolt. disassembly, which is not conducive to the long-term use of combined fasteners. [0003] The fasteners in the prior art still have the following disadvantages during use: (1) the thread structure on the existing fasteners is completely exposed to the outside, which is ea...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a corrosion-resistant internal thread combination fastener, which solves the problems of existing fasteners through the design of threadless fastening rod, positioning assembly, fastening assembly, linkage assembly and locking assembly. The thread structure on the fastener is completely exposed to the outside, which is susceptible to corrosion and reduces the fastening effect of the fastener, which is not conducive to the long-term use of the fastener. The thread structure on the combined fastener cannot be adjusted in position, and thus cannot meet different thicknesses. The tight connection of the two connected parts reduces the application range of the fastener. The existing fastener gradually rotates the nut on the bolt, so that the nut is gradually screwed into the specified position on the bolt. This connection method The problem that greatly reduces the use efficiency of fasteners

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