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公开(公告)号：US20230015750A1
公开(公告)日：2023-01-19
申请号：US17947096
申请日：2022-09-17
Inventor： Masafumi KAWAKAMI , Takanori NAKANO
IPC: B62M6/50 , B62J45/413 , B62J45/421 , B62J45/411 , B62M6/70
Abstract: A power transmission unit is used for generating auxiliary driving force for an electric bicycle, and includes a motor, an input structure, a speed reducer, a case, a bearing, and a bearing support portion. The motor includes a motor shaft. The input structure includes an input shaft and configured to rotate along with the input shaft, the input shaft being caused to rotate by external force transmitted thereto. Thea speed reducer mechanism is configured to transmit a rotational power of the motor shaft while reducing a rotational speed. The case houses the motor, the input structure, and the speed reducer mechanism. The case includes a first divided part and a second divided part. The bearing is located inside the case. The bearing supporting portion, to which the bearing is attached, supports the speed reducer mechanism. The bearing supporting portion is attached to the first divided part.
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公开(公告)号：US20210214043A1
公开(公告)日：2021-07-15
申请号：US17056266
申请日：2019-05-08
Inventor： Masato NISHIMORI , Masafumi KAWAKAMI
Abstract: A motor unit includes a substrate, a motor, and at least one conductive member. The substrate has a first surface and a second surface aligned in a thickness direction of the substrate. The motor includes at least one terminal, and in the thickness direction of the substrate, the motor is disposed closer to the second surface than to the first surface. The at least one conductive member is mounted on the first surface. The substrate has at least one through part which extends from the first surface through the second surface and in which the at least one terminal or the at least one conductive member is inserted. The at least one conductive member is at least partially deformable and is connected to the at least one terminal.
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公开(公告)号：US20240101220A1
公开(公告)日：2024-03-28
申请号：US18039024
申请日：2021-11-24
Inventor： Masafumi KAWAKAMI
Abstract: A motor unit includes: a case; a motor housed in the case; an input shaft; an output body; and a speed reducer mechanism. The input shaft penetrates through the case in an axial direction and is arranged to be rotatable around an axis defining the axial direction. The output body is arranged in the case to be rotatable around the axis. The speed reducer mechanism is housed in the case and reduces a rotational speed of the motor and transmits rotational force with the rotational speed thus reduced to the output body. The speed reducer mechanism includes only one pair of gears meshing with each other.
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公开(公告)号：US20230099314A1
公开(公告)日：2023-03-30
申请号：US17947132
申请日：2022-09-18
Inventor： Shigeru IDO , Masafumi KAWAKAMI , Takanori NAKANO
Abstract: A motor unit for use in an electric bicycle includes a motor, a switching element, a board, and a case. The switching element has the motor driven. The board has a principal surface and a reverse surface. The principal surface includes a mounting surface to mount the switching element thereon. The reverse surface faces opposite from the principal surface. The case houses the board therein. The board further has a through hole provided to penetrate through the board from the mounting surface through the reverse surface and a sheet of metal foil covering an inner peripheral surface of the through hole at least partially. The switching element is thermally connected to the sheet of metal foil. A part, located opposite from the switching element with respect to the board, of the case is thermally connected to the sheet of metal foil.
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公开(公告)号：US20250091690A1
公开(公告)日：2025-03-20
申请号：US18963885
申请日：2024-11-29
Inventor： Masafumi KAWAKAMI , Takanori NAKANO
IPC: B62M6/50 , B62J45/411 , B62J45/413 , B62J45/421 , B62M6/70 , F16D41/30
Abstract: A motor unit comprises a case, a motor, an input shaft, an output structure, a transmission member, a first tooth portion, a torque detection unit, and a rotator. The case includes a first supporting portion located at a first end of an inside of the case in the axial direction and rotatably supporting the rotator, and a second supporting portion located at a second end of the inside of the case in the axial direction and rotatably supporting the rotator. The rotator includes a second tooth portion meshing with the first tooth portion. A meshing part of the first tooth portion with the second tooth portion is arranged between the input shaft and the rotator in a direction perpendicular to the axis and is arranged radially outward of the rotator than the first supporting portion and the second supporting portion.
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Patent Agency Ranking
公开(公告)号：US20230043659A1
公开(公告)日：2023-02-09
申请号：US17816768
申请日：2022-08-02
Inventor： Shigeru IDO , Masafumi KAWAKAMI , Takanori NAKANO
IPC: H02K11/33 , H02K11/215 , B62M6/50 , B62J45/42 , B62J45/20
Abstract: A motor unit, which is an example of an embodiment, includes a motor including a motor shaft, a rotor fixed to the motor shaft, and a stator, and a control board, the control board being disposed with at least a part of the control board overlapping the motor when viewed in a motor axial direction. A sensor that detects a magnetic field of the motor shaft, the rotor, or a rotating body rotating together with the motor shaft, and a control element that controls the motor using detection information of the sensor, are mounted on the control board. The control board includes a signal line that connects the sensor and the control element. The signal line includes an arcuate wiring section bent to be convex in a radial direction outer side of a circle centering on a shaft core of the motor shaft.
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公开(公告)号：US20230043341A1
公开(公告)日：2023-02-09
申请号：US17790533
申请日：2019-03-13
Inventor： Masafumi KAWAKAMI
Abstract: A motor unit includes a case, a motor, an input shaft, an input body, an output body, and a speed reducer mechanism. The input shaft penetrates through the case in an axial direction and is arranged to be rotatable. The input body is disposed along an outer peripheral surface of the input shaft and rotates along with the input shaft. The output body is arranged along the outer peripheral surface of the input shaft to be rotatable and receives rotational force from the input body. The case includes a first bearing, a second bearing, and a third bearing. The first bearing is located at one end in an axial direction and supports a rotary shaft unit including the input shaft, the input body, and the output body. The second bearing is located at the other end in the axial direction and supports the rotary shaft unit. The third bearing is located between the first bearing and the second bearing in the axial direction and supports at least one of the input body or the output body.
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公开(公告)号：US20220009588A1
公开(公告)日：2022-01-13
申请号：US17291770
申请日：2019-11-12
Inventor： Masafumi KAWAKAMI , Takanori NAKANO
IPC: B62M6/50 , B62M6/70 , B62J45/411 , B62J45/413 , B62J45/421
Abstract: A power transmission unit for electric bicycles includes an input structure, an output structure, a torque detection unit, a detection target, and a detection unit. The input structure includes an input shaft. The input shaft is caused to rotate by external force transmitted thereto. The input structure rotates along with the input shaft. The output structure outputs rotational power by rotating along with the input structure. The torque detection unit is provided on an outer periphery of the input structure. The detection target rotates either along with, or while interlocking with, the input structure. The detection unit detects a rotational state of the detection target. At least part of the torque detection unit and at least part of the detection target overlap with each other when viewed perpendicularly to a rotational axis of the input structure.
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公开(公告)号：US20210269118A1
公开(公告)日：2021-09-02
申请号：US17259188
申请日：2019-02-26
Inventor： Masato NISHIMORI , Masafumi KAWAKAMI , Ryohei ADACHI , Fuhito UMEGAKI , Takehiro YAMAGUCHI
Abstract: A motor unit for use in electric bicycles, the motor unit comprising: a motor having a rotary shaft; a unit case to house the rotary shaft partially; an input shaft arranged in the unit case to penetrate through the unit case and to be rotatable around an axis; an input body configured to rotate along with the input shaft; an output body configured to rotate around the axis upon receiving rotational force of the input body; and a control board housed in the unit case and configured to control rotation of the motor. The unit case includes: a first heat dissipating portion connected to a first surface of the control board; and a second heat dissipating portion connected to a second surface opposite from the first surface of the control board.
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公开(公告)号：US20150158550A1
公开(公告)日：2015-06-11
申请号：US14624113
申请日：2015-02-17
Inventor： Masafumi KAWAKAMI , Munehiro DATE
Abstract: A power-assisted bicycle is provided to satisfactorily keep torque detection capability while reducing the pedal force of a pedal during pedaling if a battery has run out. A cylindrical human-power transmission member 28 having a magneto-striction generation portion 31b of a torque sensor 31 is disposed on the outer periphery of a crankshaft 7a. A combined force member 29 for combining a human driving force and an auxiliary driving force is disposed on the outer periphery of the crankshaft 7a. An auxiliary-driving-force transmission path from a motor 21 to the combined force member 29 has a deceleration mechanism 25 that includes a plurality of reduction gears 36c and 36d and reduction gear support shafts 36a and 36b. A one-way clutch 37 for interrupting a human driving force is disposed between the reduction gears 36c and 36d and the reduction gear support shafts 36a and 36b.
Abstract translation: 提供动力辅助自行车以令人满意地保持转矩检测能力，同时在踩踏期间如果电池已经用尽时降低踏板的踏板力。 具有扭矩传感器31的磁致伸缩产生部31b的筒状人力传递部件28设置在曲轴7a的外周。 用于组合人力驱动力和辅助驱动力的组合力构件29设置在曲轴7a的外周上。 从马达21到组合力构件29的辅助驱动力传递路径具有减速机构25，减速机构25包括多个减速齿轮36c和36d以及减速齿轮支撑轴36a和36b。 用于中断人的驱动力的单向离合器37设置在减速齿轮36c和36d与减速齿轮支撑轴36a和36b之间。
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