Abstract
The planetary gear unit with torque limiter mechanism was developed for the purpose of protecting a DC motor. When overload occurs in the output shaft of the gear unit, a rotary internal gear maintained with friction parts and springs, a DC motor can continue turning. In this report, first, the driving principle and design of this gear unit are presented. Next, its characteristics are analyzed theoretically. The prototype of the planetary gear unit with torque limiter mechanism is fabricated and tested. As a result, it is confirmed that this gear unit has a highly durable.
