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公开(公告)号：US20230302622A1
公开(公告)日：2023-09-28
申请号：US18155843
申请日：2023-01-18
Applicant: MAKITA CORPORATION
Inventor： Yoshinori SASAKI , Takao KUROYANAGI
Abstract: An electric work machine reduces noise from the electric work machine. An electric work machine includes a motor including a stator including a stator core and coils, and a rotor including a rotor core and a rotor shaft, an output unit located frontward from the motor and rotatable with a rotational force from the motor, a first support having a first contact surface in contact with a front end face of the stator core, a second support having a second contact surface in contact with a rear end face of the stator core, and a screw connecting the first support and the second support and fastening the stator core to the first support and the second support in a front-rear direction.
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公开(公告)号：US20190314888A1
公开(公告)日：2019-10-17
申请号：US16472924
申请日：2017-12-19
Applicant: MAKITA CORPORATION
Inventor： Hiroki IKUTA , Toshihito YABUNAKA , Takao KUROYANAGI
Abstract: A fastening tool configured to fasten a workpiece via a multi-piece swage type fastener including a pin and a collar includes an anvil, a pin-gripping part, a driving mechanism, an electric motor, a control part and a housing. The driving mechanism is configured to move the pin-gripping part relative to the anvil in a first direction along an axis so as to cause the anvil to press the collar engaged with a shaft part of the pin in a second direction and in a radially inward direction. An operation mode of the driving mechanism can be selectively switched between a plurality of operation modes including a first mode, in which a process of fastening the workpiece is completed based on a state of the fastener, and a second mode, in which the process of fastening the workpiece is completed based on a driving state of the motor.
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公开(公告)号：US20190283112A1
公开(公告)日：2019-09-19
申请号：US16465135
申请日：2017-11-24
Applicant: MAKITA CORPORATION
Inventor： Hiroki IKUTA , Toshihito YABUNAKA , Takao KUROYANAGI
IPC: B21J15/26
Abstract: A fastening tool includes a bolt-gripping part, an anvil, a bolt-gripping-part driving mechanism, a motor, a housing, and thrust rolling bearings. The bolt-gripping-part driving mechanism includes a first mechanism part supported by the housing and a second mechanism part connected to the bolt-gripping part. The second mechanism part is configured to be driven in a longitudinal-axis direction by the first mechanism part being rotationally driven, so that the bolt-gripping part is moved in the longitudinal-axis direction relative to the anvil. The thrust rolling bearings are disposed on a first direction side and a second direction side of the first mechanism part, respectively.
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公开(公告)号：US20170326720A1
公开(公告)日：2017-11-16
申请号：US15490063
申请日：2017-04-18
Applicant: MAKITA CORPORATION
Inventor： Takao KUROYANAGI , Haruki TEJIMA
CPC classification number: B25F5/021 , B25B21/00 , B25B21/02 , B25B23/18 , B25F5/02 , H01M2/1022 , H01M2220/30
Abstract: A power tool, such as an impact driver, includes a motor housing that houses a motor, and a battery-mount part to which a battery pack having a rated voltage of 18 V is mountable. A ratio of the maximum width of the motor housing to the maximum width of the battery pack is 0.75 or less. A forward/reverse-switching lever is slidable in a left-right direction to change the rotational direction of the motor and is disposed between the motor housing and the battery pack. A maximum-slide position of the forward/reverse-switching lever in the left-right direction is inward of a ground plane when the power tool is laid horizontally on its side on the ground plane.
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公开(公告)号：US20240408737A1
公开(公告)日：2024-12-12
申请号：US18680038
申请日：2024-05-31
Applicant: MAKITA CORPORATION
Inventor： Takao KUROYANAGI , Yuta ARAKI , Shizuki OKAJIMA , Taisei OSAWA , Shingo SAKURAYAMA
Abstract: A driver-drill (1) includes a motor (6) having a stator (61) and a rotor (62); an output part (8) including: a spindle (81), which is disposed more forward than the motor and, in response to application of a rotational force transmitted from the rotor, is rotated around a rotational axis (AX) extending in the front-rear direction; and a chuck (82), which is mounted on the spindle; and a speed-reducing mechanism (30), which is configured to rotate the output part at a rotational speed that is lower than the rotational speed of the rotor but at a higher torque. The maximum fastening torque of the output part is 160 N·m or more.
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Patent Agency Ranking
公开(公告)号：US20170334054A1
公开(公告)日：2017-11-23
申请号：US15597437
申请日：2017-05-17
Applicant: MAKITA CORPORATION
Inventor： Shingo KAMIYA , Haruki TEJIMA , Takao KUROYANAGI , Masanori HIGASHI
CPC classification number: B25F5/001 , H02K7/108 , H02K7/145 , H02P6/085 , H02P29/032
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 toque or smaller.
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公开(公告)号：US20140196921A1
公开(公告)日：2014-07-17
申请号：US13743746
申请日：2013-01-17
Applicant: MAKITA CORPORATION
Inventor： Tomoyuki KONDO , Takao KUROYANAGI
CPC classification number: B25F5/02 , B25F5/026 , B25G1/00 , Y10T16/4713
Abstract: A power tool includes a main body portion and a grip portion. The main body portion includes a motor unit. The grip portion extends from the main body portion between a front end and a rear end of the main body portion. The main body portion further includes an auxiliary handle mounting structure disposed between the rear end of the main body portion and a rearmost end of a region where the grip portion meets the main body portion. An auxiliary handle member is coupled to the auxiliary handle mounting structure of the main body portion.
Abstract translation: 电动工具包括主体部分和把手部分。 主体部分包括马达单元。 把手部分从主体部分在主体部分的前端和后端之间延伸。 主体部还包括辅助手柄安装结构，其设置在主体部分的后端与握持部分与主体部分相交的区域的最后端。 辅助把手构件联接到主体部分的辅助手柄安装结构。
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公开(公告)号：US20250073882A1
公开(公告)日：2025-03-06
申请号：US18817599
申请日：2024-08-28
Applicant: MAKITA CORPORATION
Inventor： Takao KUROYANAGI , Taisei OSAWA , Tetsuya WATANABE
Abstract: A driver drill may include: a motor; an output part provided forward of the motor and driven by the motor; a speed reduction mechanism disposed between the motor and the output part; a motor bracket disposed between the motor and the speed reduction mechanism; a housing that houses the motor and the motor bracket; an element provided above the motor or the speed reduction mechanism; and a lead wire connected to the element and extending more downward than the motor or the speed reduction mechanism. The lead wire may be sandwiched between the housing and the motor bracket.
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公开(公告)号：US20230191580A1
公开(公告)日：2023-06-22
申请号：US18073107
申请日：2022-12-01
Applicant: MAKITA CORPORATION
Inventor： Yukiko EBA , Takao KUROYANAGI
CPC classification number: B25F5/001 , F16H3/666 , B25B21/008
Abstract: An electric work machine includes: a motor; a first planetary gear mechanism; a second planetary gear mechanism; a spindle; a first speed switch mechanism including a first internal gear of a first stage unit and a second internal gear of a second stage unit; and a second speed switch mechanism. The first speed switch mechanism performs switching between a first speed reducing mode in which rotation of the second internal gear is prevented and rotation of the first internal gear is allowed and a second speed reducing mode in which rotation of the first internal gear is prevented and rotation of the second internal gear is allowed. The second speed switch mechanism performs switching between an enabled mode in which rotation of an internal gear of the second planetary gear mechanism is prevented and a disabled mode in which the rotation of the internal gear is allowed.
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公开(公告)号：US20220324012A1
公开(公告)日：2022-10-13
申请号：US17845186
申请日：2022-06-21
Applicant: MAKITA CORPORATION
Inventor： Toshihito YABUNAKA , Hiroki IKUTA , Takao KUROYANAGI , Koichi YAKABE
Abstract: A fastening tool includes a housing, a handle, an anvil, a pin-gripping part, a motor, and a driving mechanism. The driving mechanism is configured to move the pin-gripping part along a first axis defining a front-rear direction, relative to the anvil. The driving mechanism includes a rotary member, a movable member, a driving gear and an idler gear. The rotary member has a driven gear formed on its outer periphery and is rotatable around the first axis. The movable member is connected to the pin-gripping part and configured to be linearly moved in the front-rear direction by rotation of the rotary member. The driving gear is configured to be rotated around a second axis extending in parallel to the first axis below the first axis. The idler gear is engaged with the driving gear and the driven gear.
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