Sensor device, driving force assisting device using this sensor device, and torque sensor zero adjusting mechanism of the driving force assist device

摘要

The present invention relates to a detection device (38a), a detection disk (59A) fixed to the detection shaft, a magnetic piece (59b) fixed to the outer peripheral edge of the detection disk, and a pair of magnetic pieces between gaps of predetermined shapes The yoke 59C is provided with a magnet and a magnetic detecting element respectively fixed to the yoke 59C. The sensor device is used as a driving force assisting device for synthesizing the human force driving force and the motor driving force. The driving force assisting apparatus comprises a torque sensor 30, a vehicle speed detecting means 40 for detecting the running speed of the driving force assisting device, and an auxiliary power means using the motor M. The vehicle speed detecting means 40 detects the running speed of the driving force assisting apparatus based on the rotational position signal obtained from the rotor rotation position detecting means. The torque sensor 30 is provided with a mechanism for automatically adjusting zeros by correcting the output voltage.