公开(公告)号：US10569393B2

公开(公告)日：2020-02-25

申请号：US15891696

申请日：2018-02-08

Applicant: MAKITA CORPORATION

Inventor： Yosuke Naoi ,  Takashi Nakane ,  Hiroki Ikuta

IPC: B25B21/00 ,  F16D3/16 ,  F16H1/28 ,  F16H57/08

Abstract: An attachment includes a planetary reducer, a reaction force receiving member, and a universal joint. The planetary reducer has a first output shaft and a second output shaft connectable to a socket. The reaction force receiving member is connected to the first output shaft and has an arm part for contact with an external contact object. The universal joint has an input-side end part connectable to a final output shaft of a fastening tool and an output-side end part connected to the planetary reducer. The reaction force receiving member is configured to rotate integrally with the first output shaft in a direction opposite to the second output shaft by a reaction force caused by rotation of the socket. The universal joint is configured to transmit the torque inputted from the final output shaft via the input-side end part, to the planetary reducer via the output-side end part.