US 12,445,081 B2
Working tool and drilling method
Ryosuke Nakano, Ibaraki (JP); Tomoaki Sudo, Ibaraki (JP); Ken Inui, Ibaraki (JP); and Chisho So, Ibaraki (JP)
Assigned to KOKI HOLDINGS CO., LTD., Tokyo (JP)
Appl. No. 18/014,782
Filed by Koki Holdings Co., Ltd., Tokyo (JP)
PCT Filed Jun. 25, 2021, PCT No. PCT/JP2021/024135
§ 371(c)(1), (2) Date Jan. 6, 2023,
PCT Pub. No. WO2022/014299, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 2020-121567 (JP), filed on Jul. 15, 2020.
Prior Publication US 2024/0243685 A1, Jul. 18, 2024
Int. Cl. B23B 45/02 (2006.01); H02K 7/116 (2006.01); H02K 7/14 (2006.01); H02K 9/06 (2006.01); H02P 29/024 (2016.01)
CPC H02P 29/027 (2013.01) [B23B 45/02 (2013.01); H02K 7/116 (2013.01); H02K 7/145 (2013.01); H02K 9/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A working tool comprising:
a motor;
a working portion driven by the motor and configured to be able to perform a predetermined work;
a control unit configured to control the motor; and
an operation unit configured to instruct the control unit to drive the motor,
wherein the control unit is configured to
execute a normal mode for continuously driving the motor when the operation unit is operated,
execute a retry mode in which a stop control to stop the motor and a retry control to drive the motor at a torque or rotation speed lower than a first condition are alternately repeated when the first condition is satisfied during execution of the normal mode, and
stop the retry mode and continuously drive the motor when a second condition is satisfied during execution of the retry mode.