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公开(公告)号：US12098754B2
公开(公告)日：2024-09-24
申请号：US18076451
申请日：2022-12-07
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
摘要： During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.
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公开(公告)号：US11885382B2
公开(公告)日：2024-01-30
申请号：US18076449
申请日：2022-12-07
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
摘要： During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.
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公开(公告)号：US11773923B2
公开(公告)日：2023-10-03
申请号：US17918404
申请日：2020-09-14
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
CPC分类号： F16D43/12 , B60K17/02 , F16D13/52 , F16D47/00 , F16D2300/10 , F16D2300/12
摘要： In a power transmission apparatus, a centrifugal clutch includes a holder, a press, and springs to urge masses from a radially outer position to a radially inner position. The masses are each housed in an associated one of housing portions arranged in a circumferential direction of the holder such that the masses are radially movable. More than one spring is provided in the circumferential direction between an inner peripheral wall surface of each of the housing portions and an associated one of the masses to urge the associated mass from the radially outer position to the radially inner position.
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公开(公告)号：US11703093B2
公开(公告)日：2023-07-18
申请号：US17918396
申请日：2020-09-14
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
摘要： During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.
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公开(公告)号：US11661981B2
公开(公告)日：2023-05-30
申请号：US17860341
申请日：2022-07-08
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
IPC分类号： F16D43/12 , F16D13/52 , F16D43/206 , B60K17/02 , F16D67/02
CPC分类号： F16D43/12 , B60K17/02 , F16D13/52 , F16D43/206 , F16D67/02
摘要： A power transmission device has a first pressure member (5a), a second pressure member (5b) and a back-torque transmitting cam. The first pressure member (5a) presses the drive-side clutch plates (6) and the driven-side clutch plates (7) against each other. The second pressure member (5b) releases a press-contact force between the drive-side clutch plates (6) and the driven-side clutch plates (7). The back-torque transmitting cam moves the second pressure member (5b) relative to the first pressure member (5a) to keep pressing the drive-side clutch plates (6) and the driven-side clutch plates (7) against each other when a rotational force is input to the clutch member (4), via the output shaft (3), in a process where the weight member (8) moves from the radially-outer position to the radially-inner position and the first pressure member (5a) moves to follow the interlocking member (9).
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公开(公告)号：US11434966B2
公开(公告)日：2022-09-06
申请号：US17336479
申请日：2021-06-02
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
IPC分类号： F16D43/12 , F16D67/02 , B60K17/02 , F16D13/52 , F16D43/206
摘要： A power transmission device has a first pressure member (5a), a second pressure member (5b) and a back-torque transmitting cam. The first pressure member (5a) presses the drive-side clutch plates (6) and the driven-side clutch plates (7) against each other. The second pressure member (5b) releases a press-contact force between the drive-side clutch plates (6) and the driven-side clutch plates (7). The back-torque transmitting cam moves the second pressure member (5b) relative to the first pressure member (5a) to keep pressing the drive-side clutch plates (6) and the driven-side clutch plates (7) against each other when a rotational force is input to the clutch member (4), via the output shaft (3), in a process where the weight member (8) moves from the radially-outer position to the radially-inner position and the first pressure member (5a) moves to follow the interlocking member (9).
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公开(公告)号：US11149799B2
公开(公告)日：2021-10-19
申请号：US16925794
申请日：2020-07-10
摘要： A power transmission device has a pressure member (5) pressing drive-side clutch plates and driven-side clutch plates against each other or releasing a press-contact force. A clutch spring (10) urges the pressure member (5) in a direction so that the clutch plates are pressed against each other. A separate receiving member (11) is attached to the pressure member (5). A back-torque limiting cam reduces press-contact force between the clutch plates when the rotation speed of an output member exceeds the rotation speed of an input member. A rotation restricting portion (8a) restricting rotation, relative to the clutch member (4), of the pressure member (5) that has moved due to activation of the push rod (9). A clearance t is maintained between the pair of cam surfaces that constitute the back-torque limiting cam.
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公开(公告)号：US11773921B2
公开(公告)日：2023-10-03
申请号：US18019334
申请日：2021-07-29
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
摘要： In a power transmission apparatus, a second clutch includes a divider dividing driving clutch plates and driven clutch plates in an axial direction such that a first region adjacent to a clutch pressure plate and a second region adjacent to a centrifugal clutch are defined. The second clutch presses the driving clutch plates and the driven clutch plates in the first region and the second region against each other during operation of the centrifugal clutch, and presses the driving clutch plates and the driven clutch plates in the first region against each other during operation of a back torque transmission cam.
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公开(公告)号：US12092166B2
公开(公告)日：2024-09-17
申请号：US18019309
申请日：2021-07-29
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
CPC分类号： F16D13/74 , F16D13/56 , F16D2013/565
摘要： A power transmission apparatus includes a clutch connected to an output shaft to rotate a wheel of a vehicle, and a clutch pressure plate movable between an operating position where driving and driven clutch plates are pressed against each other so as to enable transmission of a driving force of an engine to the wheel and a non-operating position where a pressing force exerted on the driving and driven clutch plates is released so as to cut off transmission of the driving force of the engine to the wheel. One of the driven clutch plates is attached to a second clutch, and another is attached to the clutch pressure plate. The clutch pressure plate includes an oil flow passage through which oil flows to the driven clutch plate attached to the clutch pressure plate.
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公开(公告)号：US11852205B2
公开(公告)日：2023-12-26
申请号：US17918398
申请日：2020-09-14
发明人： Yoshihiko Ozawa , Han Hiong Chen , Katsu Yoshimoto
CPC分类号： F16D43/12 , F16D13/52 , F16D43/216 , F16D47/00
摘要： In a power transmission apparatus, a centrifugal clutch includes a holder, a press, a first spherical body that is partially protruded from a first opening and in contact with a rolling contact surface of the press so as to be rollable thereon, and a second spherical body that is partially protruded from a second opening and in contact with a rolling contact surface of the holder so as to be rollable thereon. A through hole has a tapered shape from the first opening to the second opening. Disconnection of the first spherical body is prevented by an outer peripheral edge of one of the first opening and the second opening that has a smaller diameter.
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