Torque measuring mechanism for spanner

Abstract

The invention discloses a torque measuring mechanism for a spanner. The torque measuring mechanism at least comprises a measuring barrel, a fixed ring and a sleeve, wherein a spiral track is sunken into the barrel, the measuring barrel can be stressed to automatically rotate, and the exterior of the barrel displays a plurality of scales; the fixed ring is used for limiting the measuring barrel to automatically rotate without displacement; and the sleeve is limited at the outer part of the measuring barrel and provided with a window facing the scale part. The torque measuring mechanism can assist a user in easily identifying the torque value of the adjusted spanner.

Description

technical field [0001] The invention relates to the field of torque measurement, in particular to a measuring mechanism suitable for a ratchet wrench. Background technique [0002] The existing ratchet wrench, like the wrench disclosed in U.S. Patent No. 4,870,879, connects one end to the end of a pipe through a torque output structure, and the other end of the pipe is connected to a handle, and a handle is installed between the pipe and the handle. Torque adjustment device. [0003] This torque adjustment device consists of an adjustment knob assembled on the handle. Several scales are displayed on the edge of the adjustment knob adjacent to the handle. These scales are separated from each other by an appropriate distance and can only measure the metric unit N-m (Newton-meter) and the imperial unit lb-ft. (pound-feet) or the approximate value of the Taiwanese unit kg-m (kg-meter), but cannot measure the precise torque value. [0004] Similar torque measurement technologie...

AI Technical Summary

Problems solved by technology

[0005] 1. The torque measurement of these patent cases relies on the way the handle is rotated relative to the pipe, and the scale on the surface of the tool is aligned with the edge of the handle by visual inspection. It is easy to cause some errors in the measured value due to the angle.

[0006] 2. The aforementioned measurement values ​​are accurate to hundreds or tens of digits, but the single digits are rather vague

[0007] 3. In the U.S. Patent No. 7,631,583, each plate must be turned to adjust the torque value of the wrench. The operation is quite cumbersome, and it is very inconvenient for the user.

Images