ELECTRIC TOOL CARRIED BY HAND

摘要

PROBLEM TO BE SOLVED: To effective protect a motor even in the condition that the motor may be over-heated by intermittently repeating a heavy load work. SOLUTION: This electric tool carried by hand comprises a driving motor 1 and a power transmitting part for transmitting motor output to an output shaft via a deceleration part. Moreover, this tool also includes a control means 5 for disconnecting the power transmitting part and motor when the detected value of heat generation of motor 1 is out of the constant range.