Patent ID: 8989608
Filing Date: 2015-03-24
Classification: F16D,F16H,G03G

Abstract:
1. A rotating mechanism driving apparatus comprising: a motor; a frictional transmission configured to output torque via a viscous fluid, the torque being input from the motor; an input shaft rotational amount detecting part configured to detect a rotational amount of an input shaft of the frictional transmission; an output shaft rotational amount detecting part configured to detect a rotational amount of an output shaft of the frictional transmission; an input torque detecting part configured to detect input torque of the frictional transmission; a slip amount calculating part configured to calculate a slip amount of the output shaft with regard to the input shaft based on difference between the rotational amount of the input shaft and the rotational amount of the output shaft; and an abnormal state determining part configured to distinctively determine first occurrence of an abnormal state of a rotating mechanism connected to the output shaft of the frictional transmission and second occurrence of an abnormal state of the frictional transmission based on a first comparison result of the input torque and a reference torque that is determined in advance and a second comparison result of the slip amount calculated by the slip amount calculating part and a reference slip amount which increases with increased amount of the input shaft torque.