Bolt-nut assembly fastening tool

Abstract

The invention discloses a bolt-nut assembly fastening tool, relates to the field of assembly tools and is specially applied to fastening of a bolt-nut assembly. The bolt-nut assembly fastening tool is composed of a hollow square-head pneumatic wrench and a special nut sleeve. The hollow square-head pneumatic wrench outputs a torque by a pneumatic motor through gear transmission, an end square head drives an outer ring of the special nut sleeve and a sleeve head to rotate and tighten a nut, one end of a center shaft is fixed and penetrates out of a hollow shaft, the other end of the center shaft is connected with an inner shaft of the special nut sleeve in an embedded mode, an inner shaft of the sleeve is pressed at the end of a bolt, and the bolt is prevented from rotating through friction force. By using the bolt-nut assembly fastening tool, an operator only needs to operate the pneumatic wrench to complete fastening work without manual assistance, so that potential safety hazards are reduced, the labor intensity is weakened, and the assembling efficiency is improved; and bolt-nut assemblies of different models can be fastened by replacing the special nut sleeve and adjusting a speed-regulating and torque-setting device, other threaded connecting pieces can be fastened by using the hollow square-head pneumatic wrench in cooperation with a common sleeve, and the universality is strong.

Description

technical field [0001] The invention belongs to the field of assembly tools, in particular to a tool specially used for fastening bolt-nut assemblies. Background technique [0002] Bolt-nut assembly fastening is one of the most common mechanical connection methods in many electromechanical equipment such as automobiles and machine tools. It is used to connect two workpieces with through holes. When fastening, an auxiliary external force must be applied to prevent the bolt and nut from rotating at the same time. It brings a lot of inconvenience to streamlined operation or multi-axis intelligent tightening. At present, there are mainly two operation schemes in actual production: one is to keep the design unchanged, and the operator holds the bolt head (or nut) with one hand during assembly, and operates the air trigger to tighten the nut (or bolt) with the other hand; the other is to change the design and use a partial Head bolts replace standard bolts, and an anti-rotation t...

AI Technical Summary

Problems solved by technology

The labor intensity and difficulty of the operator in option one are relatively high, and there are certain potential safety hazards. It is difficult to operate the parts with narrow space or compact structure, which affects the assembly efficiency; option two changes the standard parts to non-standard parts, which reduces the interchangeability and costs of bolts. Increase by about 50%. In addition, if the anti-rotation table is added to connect the workpiece, the material cost and processing cost will increase. In addition, during the assembly process, the bolts need to be installed in a certain direction, and manual auxiliary assembly is still required.

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