Precision Torque Limiting Wrench

Abstract

The invention discloses a precise twisting force limiting wrench which comprises a handle, a wrench rod and a twisting force limiting mechanism. A mounting tank is formed in the handle. A mounting hole communicating with the mounting tank is formed in the bottom of the handle. The first end of the wrench rod is limited in the mounting tank through the mounting hole. The twisting force limiting mechanism is mounted in the mounting tank. The handle is in transmission connection with the wrench rod through the twisting force limiting mechanism. A spanner is formed at the second end of the wrench rod and stretches out of the mounting hole. The precise twisting force limiting wrench has the beneficial effects of being high in precision, wide in twisting force adjustable range, simple in structure, low in cost, wide in application range, free of maintenance in use links and low in subsequent use cost.

Description

technical field [0001] The invention relates to a torque wrench, in particular to a precise torque limit wrench. Background technique [0002] The existing torque wrenches in the market all use mechanical ratchet slipping devices to achieve torque limitation. When the use environment is harsh or after repeated use, the accuracy of the ratchet slipping devices decreases, and it cannot be guaranteed that the wrench will continue to work according to the designed torque range, regardless of the actual torque rise. Or decline, will cause adverse consequences to the actual application, and the time and value of the actual torque change cannot be predicted. At the same time, the existing ratchet torque wrenches in the market are complex in structure and high in production cost; when entering the actual use link, regular inspections must be ensured to eliminate wrenches with changed torque, and the cost of use is also high, which is not conducive to wide-scale promotion and use. ...

AI Technical Summary

Problems solved by technology

[0002] The existing torque wrenches in the market all use mechanical ratchet slipping devices to achieve torque limitation. When the use environment is harsh or after repeated use, the accuracy of the ratchet slipping devices decreases, and it cannot be guaranteed that the wrench will continue to work according to the designed torque range, regardless of the actual torque rise. Or decline, will cause adverse consequences to the actual application, and the actual time and change value of the actual torque change cannot be predicted

At the same time, the existing ratchet torque wrenches in the market are complex in structure and high in production cost; when entering the actual use link, regular inspections must be ensured to eliminate the wrenches whose torque changes, and the cost of use is also high, which is not conducive to wide-scale promotion and use.

[0003] In addition, the existing torque wrench usually only corresponds to one application target, the torque cannot be adjusted or the adjustment range is small, so the scope of application is single

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