Title:
IMPACT TOOL, IMPACT TOOL CONTROL METHOD AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/100368
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to reduce the possibility of overtightening a tightening member. An impact tool (1) comprises: a motor (15); a control unit (4); an output shaft; a transmission mechanism; and a strike detection unit (49). The transmission mechanism has an impact mechanism. The impact mechanism performs a strike operation which is in accordance with the magnitude of torque applied to the output shaft. The strike detection unit (49) detects the presence or absence of a striking action on the basis of an excitation current (current measurement value id1) and/or a torque current (current measurement value iq1) that are supplied to the motor (15). Using a strike response function, the control unit (4) executes restriction processing in response to the detection of a striking action by the strike detection unit (49). The restriction processing includes reducing the rotational speed of the motor (15) and/or stopping the motor (15).
Inventors:
NAKAHARA MASAYUKI
KUSAGAWA TAKASHI
UEDA TAKAHIRO
KUSAGAWA TAKASHI
UEDA TAKAHIRO
Application Number:
PCT/JP2020/038841
Publication Date:
May 27, 2021
Filing Date:
October 14, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B25B21/00; B25B21/02
Foreign References:
| JP2010207951A | 2010-09-24 | |||
| JP2016078230A | 2016-05-16 | |||
| JP2017132021A | 2017-08-03 |
Other References:
See also references of EP 4063074A4
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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