公开(公告)号：US10967496B2

公开(公告)日：2021-04-06

申请号：US16241352

申请日：2019-01-07

Applicant: MAKITA CORPORATION

Inventor： Ryunosuke Kumagai ,  Tokuo Hirabayashi

IPC: B25D17/26 ,  B25B21/02 ,  B25D11/04

Abstract: An impact driver includes a motor, a spindle rotated by the motor, a hammer that is movable forward and rearward with respect to the spindle and that has an inner peripheral portion facing the spindle, and an anvil struck in a rotational direction by the hammer. A grease supply path is provided to supply grease to the inner peripheral portion of the hammer.

公开(公告)号：US20150158157A1

公开(公告)日：2015-06-11

申请号：US14405285

申请日：2013-05-31

Applicant: MAKITA CORPORATION

Inventor： Tokuo Hirabayashi ,  Ryunosuke Kumagai ,  Takeshi Nishimiya ,  Goshi Ishikawa ,  Takuya Kusakawa

IPC: B25B23/00 ,  B25B21/00

CPC classification number: B25B23/0064 ,  B25B21/00

Abstract: An electric power tool to tighten a screw while drilling a hole with the screw in a tightening-target-object includes a motor as a drive source. A motor control unit controls the motor such that the rotation number of the motor is a rotation number according to specifics of an operation input received by an operation receiving unit with a preset maximum rotation number as an upper limit. At a start-up of the motor, the maximum rotation number is set to a first maximum rotation number. When it is detected that a hole has been drilled in the tightening-target-object with the screw after the start-up of the motor, the maximum rotation number is set to a second maximum rotation number lower than the first maximum rotation number. The second maximum rotation number is set according to a material thickness so as to become lower as the material thickness is smaller.

Abstract translation: 用于在紧固目标物体中用螺钉钻孔时拧紧螺钉的电动工具包括电动机作为驱动源。 电动机控制单元控制电动机，使得电动机的转数根据由预设的最大转数作为上限的操作接收单元所接收的操作输入的细节而为旋转数。 在马达启动时，最大转数被设定为第一最大转数。 当检测到在电动机起动之后用螺钉在紧固目标物体中钻孔时，最大转数被设定为低于第一最大转数的第二最大转数。 第二最大转数根据材料厚度设定为随着材料厚度变小而变低。