公开(公告)号：US11958170B2

公开(公告)日：2024-04-16

申请号：US18060094

申请日：2022-11-30

Applicant: MAKITA CORPORATION

Inventor： Tokuo Hirabayashi ,  Haruki Tejima ,  Kazuma Aoki ,  Kazunori Kinoshita

IPC: B25F5/00 ,  B25B21/02 ,  B25B23/18 ,  B25F5/02

CPC classification number: B25B21/02 ,  B25B23/18 ,  B25F5/02

Abstract: An impact tool includes: a brushless motor; a spindle, which is rotated by the brushless motor; a hammer, which is held on the spindle; an anvil, which is impacted in a rotational direction by the hammer; a polymer housing, which houses the brushless motor; a hammer case, which is connected to the polymer housing and houses the hammer and the spindle; and a light unit, which is held on the hammer case and comprises a plurality of light-emitting devices. The maximum tightening torque of the anvil is 1,000 N·m or more and 2,500 N·m or less.

公开(公告)号：US10974372B2

公开(公告)日：2021-04-13

申请号：US16251425

申请日：2019-01-18

Applicant: MAKITA CORPORATION

Inventor： Haruki Tejima ,  Tomoyuki Kondo ,  Kenji Abe ,  Koji Tsukamoto

IPC: B25B21/02 ,  B25B19/00

Abstract: An impact driver includes a hammer that is rotated by a motor and an anvil configured to be struck by the hammer to rotate the anvil about a rotational axis. A hammer case houses the hammer. Two or more bearings are provided inside the hammer case and support the anvil. To inhibit vibration of the anvil during operation, the bearings may be differing types, such as a regular ball bearing and an angular contact ball bearing, and/or the bearings may have different inner and/or outer diameters. A contact member, such as an O-ring, may be disposed in an insertion hole of the anvil to reduce vibrations that are transmitted to the tool bit.

公开(公告)号：US12053871B2

公开(公告)日：2024-08-06

申请号：US18137009

申请日：2023-04-20

Applicant: MAKITA CORPORATION

Inventor： Juan Chang ,  Haohao Wang ,  Wei Yang ,  Haruki Tejima

IPC: B25F5/02 ,  B25B21/02

CPC classification number: B25F5/02 ,  B25B21/02

Abstract: An impact tool is less likely to have a shorter service life. An impact tool includes a motor, a spindle, a hammer, an anvil, and a lid. The spindle is rotatable by the motor. The spindle has an opening in a rear end face of the spindle, an internal space extending frontward from the opening and including a first space containing a lubricant oil and a second space connecting to a rear end of the first space, and a first feed port in an outer circumferential surface of the spindle. The hammer surrounds the spindle. The anvil is strikable by the hammer in a rotation direction. The lid is placeable through the opening into the second space. The first feed port allows supply of the lubricant oil from the first space to between the spindle and the hammer.

公开(公告)号：US10532454B2

公开(公告)日：2020-01-14

申请号：US15597437

申请日：2017-05-17

Applicant: MAKITA CORPORATION

Inventor： Shingo Kamiya ,  Haruki Tejima ,  Takao Kuroyanagi ,  Masanori Higashi

IPC: B25F5/00 ,  H02P29/032 ,  H02K7/108 ,  H02K7/14 ,  H02P6/08

Abstract: An electric working machine according to one aspect of the present disclosure includes an output shaft, a motor, a transmitting device, a drive device, a controller, and a current path. The transmitting device has transmittable allowable torque and transmits rotation of the motor to the output shaft. The drive device energizes the motor with electric supply from a battery in accordance with a command from outside the electric working machine. The current path is configured to be able to energize the motor with a current value larger than an allowable current value required to limit torque generated in the transmitting device due to rotation of the motor to the allowable torque or smaller.