Rotational torsion tester

摘要

A rotational torsion tester, comprising: a first drive shaft; a second drive shaft; a load applying unit that applies a torsional load to a workpiece; at least one bearing unit including a first bearing unit that supports the load applying unit to be rotatable about a rotation axis; a rotation drive unit having a first electric motor that drives the second drive shaft and the load applying unit to rotate in phase; and a torque sensor that detects the torsional load, wherein the load applying unit comprises: a second electric motor that drives the first drive shaft; the torque sensor is attached to a part at which the first drive shaft is inserted into the shaft part; the torque sensor is disposed between a pair of first bearings; and the torque sensor includes a strain gauge adhered to a narrowed part to detect the torsional load.

主权项

1. A rotational torsion tester, comprising:
a first drive shaft that rotates about a predetermined rotation axis, an end of a workpiece being attached to the first drive shaft; a second drive shaft that rotates about the predetermined rotation axis, the other end of the workpiece being attached to the second drive shaft; a load applying unit that applies a torsional load to the workpiece by driving and rotating the first drive shaft; at least one bearing unit including a first bearing unit that supports the load applying unit to be rotatable about the predetermined rotation axis; a rotation drive unit having a first electric motor that drives the second drive shaft and the load applying unit to rotate in phase; and a torque sensor that detects the torsional load, wherein: by causing the rotation drive unit to rotate the workpiece via the first drive shaft and the second drive shaft and by causing the load applying unit to give a phase difference to rotations of the first drive shaft and the second drive shaft, a load is applied to the workpiece; the load applying unit comprises: a second electric motor that drives the first drive shaft; and a frame having a cylindrical shaft part into which the first drive shaft is inserted; the frame is supported by the first bearing unit at the shaft part and the frame supports the first drive shaft; the torque sensor is attached to a part at which the first drive shaft is inserted into the shaft part, and detects the torsional load at the part; the shaft part includes a pair of first bearings which are disposed to be away from each other in an axial direction and rotatably support the first drive shaft; the torque sensor is disposed between the pair of first bearings; a narrowed part formed to have a decreased diameter is formed at the part at which the first drive shaft is situated in the shaft part; and the torque sensor includes a strain gauge adhered to the narrowed part to detect the torsional load.