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公开(公告)号:US09948162B2
公开(公告)日:2018-04-17
申请号:US14481237
申请日:2014-09-09
Applicant: MAKITA CORPORATION
Inventor: Tatsuya Nagahama , Junya Inuzuka , Takashi Momose
IPC: H02K3/28 , H02K7/14 , B25F5/00 , H02K3/52 , H02K5/22 , H02K29/08 , H02K7/116 , H02K11/215 , H02K11/27
CPC classification number: H02K7/145 , H02K3/28 , H02K3/522 , H02K5/225 , H02K7/116 , H02K11/215 , H02K11/27 , H02K29/08 , H02K2203/03 , H02K2203/09
Abstract: A power tool (1; 90) includes a motor (17) having a stator (18) and a rotor (19). The stator (18) includes front and rear insulators (21, 22) respectively disposed forward and rearward of a stator core (20) in an axial direction thereof. At least six coils (23) are respectively wound on the stator (18) such that the coils (23) are wound through the front and rear insulators (21, 22). Winding wires (23a) respectively electrically connect circumferentially-adjacent pairs of the coils (23). A short circuiting device (25) short circuits respective pairs of windings (23a) that are located diagonally or diametrically across from one another.
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公开(公告)号:US09776338B2
公开(公告)日:2017-10-03
申请号:US14164128
申请日:2014-01-24
Applicant: MAKITA CORPORATION
Inventor: Kenji Abe , Yusuke Hirata , Tatsuya Nagahama
IPC: B26B7/00 , B27B19/14 , B27B9/04 , B26D7/06 , B26F3/00 , B27B5/38 , B23Q11/12 , H02K9/06 , H02K7/106 , H02K7/14 , B25F5/00
CPC classification number: B27B5/38 , B23Q11/126 , B25F5/001 , B25F5/008 , H02K7/106 , H02K7/145 , H02K9/06 , H02K11/0094
Abstract: A power tool, for example, a portable circular saw, includes a fan, a motor configured to rotate the fan, an output part or shaft driven by the motor, a motor housing that houses the motor, a grip housing connected to the motor housing, a trigger associated with the grip housing, and a brake member configured to brake a rotation of the motor, the brake member being mounted inside the grip housing. The brake member may be a resistive element of a rheostatic braking system. The housing and fan are configured such that cooling air is directed to cool the brake member.
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公开(公告)号:US11695182B2
公开(公告)日:2023-07-04
申请号:US17036411
申请日:2020-09-29
Applicant: MAKITA CORPORATION
Inventor: Akira Naito , Tatsuya Nagahama
IPC: H01M50/213 , H01M10/42 , H01M50/10 , H01M50/543 , H01M50/572 , H01M50/30
CPC classification number: H01M50/213 , H01M10/425 , H01M50/10 , H01M50/394 , H01M50/543 , H01M50/572 , H01M2220/30
Abstract: A battery pack (2; 602) includes: an outer case (12; 612); one or more battery cells (90a-90j); and a cell case (80), which is housed in the outer case (12; 612) and houses the battery cell(s) (90a-90j). The outer case (12; 612) has: an upper surface (wall) (14b), in which a terminal-opening part (22a) for exposing a terminal (102) is provided; a bottom wall (15e); and a plurality of side surfaces (walls) (15a-15d) extending upward from the bottom wall (15e). The battery cell(s) (90a-90j) is (are) disposed parallel to the bottom wall (15e). An opening (40a-40j) is provided in a specific side surface (15b, 15d), from among the plurality of side surfaces (15a-15d), that faces an end surface of the battery cell(s) (90a-90j) in a longitudinal direction.
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公开(公告)号:USD972497S1
公开(公告)日:2022-12-13
申请号:US29775877
申请日:2021-03-25
Applicant: MAKITA CORPORATION
Designer: Tomonori Kawase , Tatsuya Nagahama , Kazuya Tanaka
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公开(公告)号:US10749405B2
公开(公告)日:2020-08-18
申请号:US15978467
申请日:2018-05-14
Applicant: MAKITA CORPORATION
Inventor: Tatsuya Nagahama
IPC: H02K5/22 , H02K7/14 , B25D11/00 , H02K11/21 , B25D16/00 , H02K29/06 , H02K3/50 , B25F5/02 , B25F5/00 , B25D17/00 , H02K9/06
Abstract: Provided is a power tool whereby reduction is made for time-consuming effort and cost required in trouble, inspection and so forth related to a motor. A hammer drill, which is an example of a power tool, includes a plurality of coils, an insulator holding the plurality of coils, a terminal unit that is electrically connected to the plurality of coils and is attached to the insulator, a rotor that is rotatable with respect to the insulator, and a sensor board that detects rotation of the rotor and is attached to the terminal unit. The sensor board is detachable from the terminal unit, while the terminal unit is attached to the insulator.
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公开(公告)号:US10608500B2
公开(公告)日:2020-03-31
申请号:US15392747
申请日:2016-12-28
Applicant: MAKITA CORPORATION
Inventor: Tatsuya Nagahama
IPC: H02K7/14 , H02K3/52 , H02K11/215 , H02P6/17 , B25F5/00 , H01M2/02 , H01M2/30 , H01M10/42 , H01M10/48 , H02K1/12 , H02K5/22 , H02K9/06 , H02K11/21
Abstract: In an impact driver, a stator is made compact to accommodate a brushless motor in a reduced space, thereby keeping a housing compact, and productivity and handleability are also improved. The impact driver includes a brushless motor including a stator in which coils are wound and that includes fusing terminals at which the coils are fused, and a rotor capable of rotating relative to the stator, lead wires for supplying power to the coils, respectively, and lead wire-side terminals to which the lead wires are connected, respectively. The fusing terminals and the lead wire-side terminals are connected to each other at a predetermined position (a connection plate) in a circumferential direction of the stator by means of screws.
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17.
公开(公告)号:US10396573B2
公开(公告)日:2019-08-27
申请号:US15689725
申请日:2017-08-29
Applicant: MAKITA CORPORATION
Inventor: Nobuyasu Furui , Hitoshi Suzuki , Masaaki Fukumoto , Takuya Umemura , Kosuke Ito , Hitoshi Sengiku , Shuji Yoshikawa , Tatsuya Nagahama
Abstract: A method for recharging a battery pack (40; 40′) includes attaching a portable charger (120) to a user, which portable charger comprises or is attached to a self-contained power supply (130, 140) and wherein a first charging port (132, 146) of the portable charger is disposed, e.g., on a belt (144) worn by the user, hanging the battery pack on the belt while the battery pack is physically engaged and in electrical communication with a power tool (10; 10′), and initiating a transfer of power from the charger to the battery pack when the first charging port is at least proximal to a second charging port (85, 148) that is in electrical communication with at least one battery cell (50) of the battery pack. A portable charging system capable of performing this method, as well as an adapter for use in performing this method, are also disclosed.
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公开(公告)号:US20180205288A1
公开(公告)日:2018-07-19
申请号:US15919615
申请日:2018-03-13
Applicant: MAKITA CORPORATION
Inventor: Tatsuya Nagahama , Junya lnuzuka , Takashi Momose
CPC classification number: H02K7/145 , H02K3/28 , H02K3/522 , H02K5/225 , H02K7/116 , H02K11/215 , H02K11/27 , H02K29/08 , H02K2203/03 , H02K2203/09
Abstract: A power tool (1; 90) includes a motor (17) having a stator (18) and a rotor (19). The stator (18) includes front and rear insulators (21, 22) respectively disposed forward and rearward of a stator core (20) in an axial direction thereof. At least six coils (23) are respectively wound on the stator (18) such that the coils (23) are wound through the front and rear insulators (21, 22). Winding wires (23a) respectively electrically connect circumferentially-adjacent pairs of the coils (23). A short circuiting device (25) short circuits respective pairs of windings (23a) that are located diagonally or diametrically across from one another.
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19.
公开(公告)号:US20170126038A1
公开(公告)日:2017-05-04
申请号:US15402584
申请日:2017-01-10
Applicant: MAKITA CORPORATION
Inventor: Shuji Yoshikawa , Tatsuya Nagahama , Nobuyasu FURUI , Hitoshi Suzuki , Masaaki FUKUMOTO , Takuya UMEMURA , Kosuke ITO
CPC classification number: H02J7/0044 , A41F9/002 , A45F3/14 , A45F2003/142 , A45F2003/144 , A45F2003/146 , B25F5/02 , H02J7/0027 , H02J7/0042 , H02J7/0054
Abstract: A charger for a hand-held power tool includes a power source interface, a charger base and a charging cradle rotatably supported on the charger base. The rotatable charging cradle includes at least two charging output terminals electrically connected to the power source interface. A power tool system includes the charger and the hand-held power tool. A method of charging the power tool system includes contacting charging input terminals of the power tool with the charging output terminals, rotating the charging cradle and the power tool relative to the charging base and supplying charging current to at least one battery cell while the charging cradle and the power tool are allowed to freely swing relative to the charging base.
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公开(公告)号:US09198347B2
公开(公告)日:2015-12-01
申请号:US14102885
申请日:2013-12-11
Applicant: MAKITA CORPORATION
Inventor: Tatsuya Nagahama
CPC classification number: A01D34/78 , A01D34/6806 , A01D34/90 , H02P6/16
Abstract: A work machine includes a motor and a sensor disposed in a front unit, a motor controller disposed in a rear unit, a motor power line and a sensor signal line disposed along an operation rod, and a pair of electric connectors. The motor power line includes first and second partial motor power lines disposed along the first and second partial rods respectively. The sensor signal line includes first and second partial sensor signal lines disposed along the first and second partial rods respectively. A first electric connector includes first electric terminals, each of which is coupled with corresponding one of the first partial motor power line or the first partial sensor signal line, and a second electric connector includes second electric terminals, each of which is coupled with corresponding one of the second partial motor power line or the second partial sensor signal line.
Abstract translation: 工作机械包括电动机和设置在前面单元中的传感器,设置在后部单元中的电动机控制器,电动机电力线以及沿着操作杆设置的传感器信号线和一对电连接器。 马达动力线包括分别沿着第一和第二部分杆布置的第一和第二部分马达动力线。 传感器信号线包括分别沿着第一和第二部分杆布置的第一和第二部分传感器信号线。 第一电连接器包括第一电端子,每个电端子与第一部分电动机电源线或第一部分传感器信号线中的相应一个耦合,并且第二电连接器包括第二电端子,每个电端子与相应的一个 的第二部分电动机电力线或第二部分传感器信号线。
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