Patent ID: 11958173
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An impact tool comprising:
a motor;
a control unit configured to perform vector control on the motor;
an output shaft configured to be coupled to a tip tool;
a transmission mechanism including an impact mechanism and configured to transmit motive power of the motor to the output shaft, the impact mechanism being configured to perform an impact operation of applying impacting force to the output shaft according to magnitude of torque applied to the output shaft; and
an impact detection unit configured to determine, based on at least one of an excitation current to be supplied to the motor or a torque current to be supplied to the motor, whether or not the impact operation is being performed,
the control unit being configured to place a limit on an increase in a number of revolutions of the motor before the impact detection unit detects the impact operation and remove the limit on the increase in the number of revolutions of the motor when the impact detection unit detects the impact operation.