Title:
電動工具
Document Type and Number:
Japanese Patent JP6690115
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a power tool limited in reaction even when a load is suddenly reduced, and high in operability.SOLUTION: A power tool includes a motor, a control unit for controlling power supply to the motor, rotational speed detection means for detecting the rotational speed of the motor, and a main switch for transmitting an ON-OFF signal for switching the motor between driving and stopping to the control unit. The control unit executes constant speed control for supplying power to control the motor at a first rotational speed, and can switch the motor to power operation control for supplying power irrespective of a rotational speed when a predetermined load is detected during the constant speed control. The control unit executes control so as to prevent the rotational speed of the motor from exceeding a second rotational speed higher than the first rotational speed during the power operation control.SELECTED DRAWING: Figure 11
Inventors:
Kenichiro Yoshida
Eiji Nakayama
Eiji Nakayama
Application Number:
JP2014219783A
Publication Date:
April 28, 2020
Filing Date:
October 28, 2014
Export Citation:
Assignee:
Koki Holdings Co., Ltd.
International Classes:
B25F5/00; B23D45/16; B27B9/00
Domestic Patent References:
| JP2015035843A | ||||
| JP2012000726A | ||||
| JP2011240441A |
Attorney, Agent or Firm:
Takashi Murai
Hiromi Murai
Hiromi Murai