TORQUE SENSING DEVICE AND THE ROTATIONAL DRIVING TOOL COMBINED THEREOF

摘要

A torque sensing device includes an idle wheel disposed between a force input shaft and a force output shaft, the idle wheel receives a tangential force from the force input shaft and the force output shaft to generate a counterforce as a loading, the center of the idle wheel is pivotally disposed on a positioning beam or a basis nearby, the positioning beam has a beam central line where a strain gauge installed. The positioning beam transforms the loading of the idle wheel along the beam central line to a normal force on the cross section of the positioning beam along the beam central line, the positioning beam generates a strain due to the normal force on the cross section of the positioning beam, the strain gauge detects the strain as the torsion sensing value of the output shaft on the region between the force input shaft and the force output shaft. A rotational driving tool is combined with the torque sensing device to improve the detecting precision of the torsion.

主权项

1. A torque sensing device, comprising:
an idle wheel disposed between an force input shaft and an force output shaft, the idle wheel receiving a tangential force formed by the force input shaft and the force output shaft respectively, and a sum of the tangential forces being formed a counteraction force as a loading of the idle wheel; a linear shaped positioning beam having a beam central line extending along the positioning beam, a center of the idle wheel being pivotally disposed on the positioning beam where the beam central line penetrates through; a strain gauge fixed to the positioning beam where the beam central line penetrates through, the center of the idle wheel being separated from a center of the strain gauge by the beam central line; wherein the positioning beam transforms the loading of the idle wheel to an axial force along the beam central line, the positioning beam generates a strain by the axial force, the strain gauge detects the strain as a torque sensing value of the force output shaft on the region between the force input shaft and the force output shaft.