US 12,076,841 B2
Impact tool, method for controlling the impact tool, and program
Takahiro Ueda, Okayama (JP); and Takashi Kusagawa, Osaka (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 18/016,993
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed May 17, 2021, PCT No. PCT/JP2021/018596
§ 371(c)(1), (2) Date Jan. 19, 2023,
PCT Pub. No. WO2022/024501, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2020-131107 (JP), filed on Jul. 31, 2020.
Prior Publication US 2023/0311278 A1, Oct. 5, 2023
Int. Cl. B25B 21/02 (2006.01); B25B 23/147 (2006.01); B25F 5/00 (2006.01)
CPC B25B 21/02 (2013.01) [B25B 23/1475 (2013.01); B25F 5/001 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An impact tool comprising:
a motor;
an impact mechanism including a hammer and an anvil, the hammer being configured to rotate with motive power supplied from the motor, the anvil being configured to rotate upon receiving impacting force from the hammer;
an output shaft configured to rotate along with the anvil;
a control unit configured to control a rotational velocity of the output shaft; and
an angular lead measurer configured to measure an angular lead in rotation of the anvil over the hammer,
the impact mechanism being configured to, when a torque condition on magnitude of torque applied to the output shaft is satisfied, perform an impact operation of applying the impacting force from the hammer to the anvil,
the control unit being configured to change, according to the angular lead measured by the angular lead measurer, a control mode for controlling the rotational velocity of the output shaft from one of a plurality of modes to another.