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公开(公告)号：US09676092B2
公开(公告)日：2017-06-13
申请号：US14373228
申请日：2012-12-06
Applicant: MAKITA CORPORATION
Inventor： Ryunosuke Kumagai
Abstract: An electric power tool capable of suppressing damage to a fan housed in a housing to cool a motor due to foreign matter without increasing the number of parts. An impact driver includes a motor, a centrifugal fan attached to an output shaft of the motor to cool the motor, an annular air collecting member disposed between the motor and the centrifugal fan to collect cooling air by the centrifugal fan, a housing that houses the motor, the centrifugal fan, and the air collecting member, and ventilation windows formed in the housing to communicate between the inside and the outside of the housing on the outer side of the centrifugal fan. The air collecting member is provided with wall bodies positioned on the inner side of the ventilation windows.
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公开(公告)号：US10213912B2
公开(公告)日：2019-02-26
申请号：US14320980
申请日：2014-07-01
Applicant: MAKITA CORPORATION
Inventor： Ryunosuke Kumagai , Tokuo Hirabayashi
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.
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公开(公告)号：US10213907B2
公开(公告)日：2019-02-26
申请号：US15477388
申请日：2017-04-03
Applicant: MAKITA CORPORATION
Inventor： Ryunosuke Kumagai , Tokuo Hirabayashi , Hidenori Nagasaka , Manabu Sugimoto
Abstract: An impact driver or impact tool includes a motor, a motor housing that houses the motor, a grip housing integrally provided with the motor housing, a hammer case is disposed frontward of the motor housing, a spindle rotated by the motor, a hammer housed inside the hammer case and configured to be rotated by the spindle, and an anvil housed inside the hammer case which anvil is configured to be impacted by the hammer. In this impact driver, a length from a rear end of the motor housing to a front end of the anvil (i.e., the front-rear length of a main body) is less than 128 mm.
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公开(公告)号：US09643300B2
公开(公告)日：2017-05-09
申请号：US14064278
申请日：2013-10-28
Applicant: MAKITA CORPORATION
Inventor： Ryunosuke Kumagai , Tokuo Hirabayashi , Hidenori Nagasaka , Manabu Sugimoto
CPC classification number: B25B21/02 , B25B21/026 , B25B23/1405 , B25D11/04 , B25F5/001 , B25F5/008 , B25F5/02
Abstract: An impact driver or impact tool includes a motor, a motor housing that houses the motor, a grip housing integrally provided with the motor housing, a hammer case is disposed frontward of the motor housing, a spindle rotated by the motor, a hammer housed inside the hammer case and configured to be rotated by the spindle, and an anvil housed inside the hammer case which anvil is configured to be impacted by the hammer. In this impact driver, a length from a rear end of the motor housing to a front end of the anvil (i.e., the front-rear length of a main body) is less than 128 mm.
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公开(公告)号：US20150144365A1
公开(公告)日：2015-05-28
申请号：US14406045
申请日：2013-06-04
Applicant: MAKITA CORPORATION
Inventor： Tokuo Hirabayashi , Ryunosuke Kumagai , Takeshi Nishimiya , Goshi Ishikawa , Takuya Kusakawa
CPC classification number: B25B23/1405 , B25B21/02
Abstract: A rotary impact tool according to one aspect of the present invention includes a motor, an impact mechanism, a drive unit, an impact detection unit, and a control unit. The control unit reduces a driving force for the motor caused by the drive unit when a count of impacts detected by the impact detection unit has reached a determination count set in advance, which is a value greater than one.
Abstract translation: 根据本发明的一个方面的旋转冲击工具包括马达，冲击机构，驱动单元，冲击检测单元和控制单元。 当冲击检测单元检测到的冲击计数达到预先设定的大于1的确定计数时，控制单元减小由驱动单元引起的电动机的驱动力。
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Patent Agency Ranking
公开(公告)号：US20150027743A1
公开(公告)日：2015-01-29
申请号：US14373228
申请日：2012-12-06
Applicant: MAKITA CORPORATION
Inventor： Ryunosuke Kumagai
Abstract: An electric power tool capable of suppressing damage to a fan housed in a housing to cool a motor due to foreign matter without increasing the number of parts. An impact driver includes a motor, a centrifugal fan attached to an output shaft of the motor to cool the motor, an annular air collecting member disposed between the motor and the centrifugal fan to collect cooling air by the centrifugal fan, a housing that houses the motor, the centrifugal fan, and the air collecting member, and ventilation windows formed in the housing to communicate between the inside and the outside of the housing on the outer side of the centrifugal fan. The air collecting member is provided with wall bodies positioned on the inner side of the ventilation windows.
Abstract translation: 一种电动工具，其能够抑制容纳在壳体中的风扇的损坏，以由于异物而冷却电动机，而不增加部件的数量。 冲击驱动器包括电动机，附接到电动机的输出轴的离心风扇以冷却电动机;环形空气收集构件，设置在电动机和离心风扇之间以通过离心风扇收集冷却空气;壳体， 电动机，离心风扇和集气构件，以及形成在壳体中的通风窗口，用于在离心风扇的外侧上在壳体的内部和外部之间连通。 空气收集构件设置有位于通风窗内侧的壁体。
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公开(公告)号：US12064853B2
公开(公告)日：2024-08-20
申请号：US17517712
申请日：2021-11-03
Applicant: MAKITA CORPORATION
Inventor： Ryunosuke Kumagai , Tokuo Hirabayashi , Tomoyuki Kondo
Abstract: An impact tool (1; 1A) includes a spindle (12) rotated by a motor (10) and a hammer (70) rotated by the spindle. The hammer is designed to impact an anvil (14) in a rotational direction. A case (8) houses the hammer. A bearing (78A, 78B) is disposed between the hammer case and the anvil. An O-ring (84) is disposed between the anvil and the bearing.
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公开(公告)号：US10343268B2
公开(公告)日：2019-07-09
申请号：US14406045
申请日：2013-06-04
Applicant: MAKITA CORPORATION
Inventor： Tokuo Hirabayashi , Ryunosuke Kumagai , Takeshi Nishimiya , Goshi Ishikawa , Takuya Kusakawa
Abstract: A rotary impact tool according to one aspect of the present invention includes a motor, an impact mechanism, a drive unit, an impact detection unit, and a control unit. The control unit reduces a driving force for the motor caused by the drive unit when a count of impacts detected by the impact detection unit has reached a determination count set in advance, which is a value greater than one.
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公开(公告)号：US10322498B2
公开(公告)日：2019-06-18
申请号：US14885448
申请日：2015-10-16
Applicant: MAKITA CORPORATION
Inventor： Goshi Ishikawa , Ryunosuke Kumagai , Takuya Kusakawa , Yoshitaka Ichikawa , Tokuo Hirabayashi
Abstract: An electric power tool in one aspect of the present disclosure comprises a motor, a hitting mechanism, a hitting detector, and a control unit. The control unit is configured to set a control amount of the motor so that the motor rotates at a lower speed than a speed in the target rotation state during an initial driving period, and switch the control amount to a final control amount corresponding to the target rotation state when the initial driving period elapses. The initial driving period is a period from when generation of a hitting force is detected by the hitting detector until a predetermined first time period elapses, after the motor is started driven.
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10.发明申请公开(公告)号：US20190047132A1
公开(公告)日：2019-02-14
申请号：US16056717
申请日：2018-08-07
Applicant: MAKITA CORPORATION
Inventor： Ryunosuke Kumagai , Masahiro Watanabe , Jiro Suzuki , Kosuke Ito
Abstract: An electric working machine in one aspect of the present disclosure includes a motor, a setter, and a controller. The setter is configured to modifiably set a change characteristic in changing a rotational state of the motor from a low speed rotation to a high speed rotation. The high speed rotation is greater than the low speed rotation in rotational frequency of the motor.
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