Reduction gear failure diagnosis device, failure diagnosis method, and mechanical device including the failure diagnosis device

摘要

A reduction gear failure diagnosis device and the like capable of performing failure diagnosis during the operation of a mechanical device provided with a reduction gear are provided. A failure diagnosing device (1) for a speed reducer (13) provided to a mechanical device (11) driven by a motor (14) so as to decelerate and transmit the rotational power of the motor to an operating part (12) of the mechanical device. The acceleration / deceleration period during which the operation of the motor is accelerated / decelerated is specified, and it is determined whether or not there is a sign of failure of the speed reducer based on the change in the frequency spectrum of the motor current with respect to the change in the motor speed during the acceleration / deceleration period. It is configured as follows. [Selection] Figure 1