Patent ID: 9687972
Date: 2017-06-27
CPC Classifications: B25B

Claim:
1. An impact rotation tool comprising: a drive source that generates power; an impact force generation unit that generates impact force by changing the power generated by the drive source to pulsed torque; a shaft that transmits the pulsed torque to a distal tool with the generated impact force; a torque detector that generates a signal corresponding to the torque applied to the shaft; a determination unit that determines whether or not a torque value obtained from a signal corresponding to the torque has reached a predetermined torque value; and a control unit that controls the drive source to a predetermined driving state when the determination unit determines that the torque value has reached the predetermined torque value, wherein a rotation unit control circuit including the determination unit is arranged on the shaft, and the impact rotation tool further comprising a slip ring unit arranged between the torque detector and the control unit, wherein the slip ring unit transmits a signal from the torque detector to the control unit.