Patent ID: 9625332
Date: 2017-04-18
CPC Classifications: G01L

Claim:
1. A torque measurement device-equipped rotation transmission apparatus, comprising: a rotating-shaft unit, a connecting shaft, a first characteristic-changing member, a second characteristic-changing member, one sensor unit, a first stopper section, and a second stopper section, the rotating-shaft unit comprising: the connecting shaft arranged on the inner-diameter side of the torsion bar so as to be concentric with the torsion bar, and having: one end section connected to the first rotating shaft so that relative rotation is not possible; and another end section protruding in the axial direction from the other end section of the second rotating shaft and the torsion bar; the first characteristic-changing member fastened to the other end section of the connecting shaft so as to be concentric with the connecting shaft, and having a circular ring shaped first detected section; the second characteristic-changing member fastened to a distal end section of the second rotating shaft with respect to the first rotating shaft so as to be concentric with the second rotating shaft, and having a circular ring shaped second detected section arranged so as to closely face the first detected section in the axial direction or in the radial direction; the first characteristic-changing member and the second characteristic-changing member constructed to move relative to each other in the direction of rotation due to the elastic torsional deformation of the middle section in the axial direction of the torsion bar occurring when the rotating shaft unit transmits torque; the sensor unit supported by the portion that does not rotate even during use, and constructed to generate an output signal changing according to the rotation of the first detected section and the second detected section; the first stopper section provided on part of the first rotating body; the second stopper section provided on part of the second rotating body, and constructed to engage with the first stopper section so that torque can be transmitted only when the torsional angle of the torsion bar reaches a specified amount within the elastic range of the torsion bar; and the torque measurement device-equipped rotation transmission apparatus capable of measuring the torque that the rotating-shaft unit transmits according to the change in the output signal from the sensor unit due to relative displacement in the direction of rotation of the first characteristic-changing member and the second characteristic changing member.