TORQUE DETECTION DEVICE, METHOD FOR ASSEMBLING SAME, AND ELECTRIC POWER STEERING DEVICE

摘要

This torque detection device comprises a lower shaft (21) that is a torque transmission shaft, and a cylindrical torque detection sleeve (14) having a part on the front side in the shaft direction that has a plurality of window holes (36a, 36b). A cylindrical part (29) of the lower shaft (21) comprises circumferential grooves (38) that are formed in the circumferential direction at a plurality of axial-direction locations on the outer circumferential surface of the cylindrical part (29) and are parallel to each other. A part of the torque detection sleeve (14) on the rear side in the shaft direction is fit over the cylindrical part (29) so as to cover the entirety of each of the circumferential grooves (38) and has, at parts in the shaft direction that overlap with the circumferential grooves (38) in the radial direction, crimped parts (40) that have been crimped into and attached to the circumferential grooves (38). As a result, a torque detection device structure is achieved that makes it possible to enhance the bonding strength and safety of the part where the torque transmission shaft and torque detection sleeve are bonded.