Importance

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Abstract

A torque-controlling wrench includes a handle, a socket-driving unit installed on the handle and a torque-controlling device. The torque-controlling device includes a rod installed in the handle and connected to the socket-driving unit, a knob installed on the handle and a spring compressed between the rod and the knob so that the knob can be turned to adjust a force exerted on the rod by the spring. An intermediate mechanism includes a first roller connected to the rod, a frame connected to the spring, a wheel installed on the frame and engaged with the roller and a second roller installed on the frame and engaged with the wheel. The centers of the first and second rollers are located on a same side of a vertical line passing a center of the wheel.

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First Claim