Torque spanner

Abstract

Disclosed is a torque spanner. The torque spanner comprises a spanner end, a spanner bar and a stress application loop bar. The stress application loop bar refers to a hollowed shell, and a connectinggroove is formed in the upper end of the stress application loop bar. The spanner end and the spanner bar are of an integrated structure. A boss is arranged at the necking position of the lower end of the spanner end. A connecting groove of the spanner bar abuts against the boss surface of the spanner end. The spanner bar and the stress application loop bar are movably connected together througha rotating shaft. A steel ball and a spring are further arranged inside the stress application loop bar. A diagonal plane is arranged at the lower end of the spanner bar and further abuts against theouter surface of the steel ball. The lower end of the steel ball is connected with the spring, and the lower end of the spring is connected with an adjusting jackscrew. The adjusting jackscrew is in threaded connection with the inner wall of the lower end of the stress application loop bar. The torque spanner is simple in structure, a nut can stretch into a bayonet inside the spanner end in the using process, the stress application loop bar is twisted, the steel ball can touch the inner wall of the stress application loop bar and a clear alarm can be raised when a set torque value is reached,vibrations can be felt on the stress application loop bar, and locking can be stopped at the moment. Operation is convenient, time and labor are saved and the torque can be adjusted.

Description

technical field [0001] The invention relates to a mechanical device, in particular to a torque wrench. Background technique [0002] The nut in the tool handle system is mainly used to cooperate with the handle body to act on the collet, so that the collet can clamp the tool; for the locking of the collet, problems often occur when using an ordinary wrench in actual production applications; because the torque value of the wrench cannot Fixed, if the locking force is not enough, the nut will not be tightly locked and easy to loosen, which will affect the assembly accuracy and dynamic balance of the handle collet, and even cause the tool to fall off; if the locking force is too large, it will cause violence to the nut Sexual damage or even damage to the entire tool. The structure of the torque wrench currently on the market is too complicated and the production cost is too high, and ordinary users usually do not use it; moreover, most torque wrenches are monopolized by foreig...

AI Technical Summary

Problems solved by technology

[0002] The nut in the tool handle system is mainly used to cooperate with the handle body to act on the collet, so that the collet can clamp the tool; for the locking of the collet, problems often occur when using an ordinary wrench in actual production applications; because the torque value of the wrench cannot Fixed, if the locking force is not enough, the nut will not be tightly locked and easy to loosen, which will affect the assembly accuracy and dynamic balance of the handle collet, and even cause the tool to fall off; if the locking force is too large, it will cause violence to the nut destructive damage or even damage to the entire tool

The structure of the torque wrench currently on the market is too complicated and the production cost is too high, and ordinary users usually do not use it; moreover, most torque wrenches are monopolized by foreign companies, and the cost performance is low

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