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公开(公告)号：US20200340537A1
公开(公告)日：2020-10-29
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：US20230138425A1
公开(公告)日：2023-05-04
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：US20230135364A1
公开(公告)日：2023-05-04
申请号：US17918394
申请日：2020-09-14
摘要： In a power transmission apparatus, an auxiliary clutch plate different in diameter from driving and driven clutch plates located in a clutch housing. When the driving and driven clutch plates are pressed against each other, the auxiliary clutch plate is pressed to enable transmission of a driving force of an engine to a driving wheel. When a pressing force exerted on the driving and driven clutch plates is released, a pressing force exerted on the auxiliary clutch plate is released to cut off transmission of the driving force of the engine to the driving wheel.
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公开(公告)号：US20230213071A1
公开(公告)日：2023-07-06
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：US20230145318A1
公开(公告)日：2023-05-11
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 , F16D13/52 , F16D47/00 , B60K17/02 , 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：US20230144189A1
公开(公告)日：2023-05-11
申请号：US17918398
申请日：2020-09-14
发明人： Yoshihiko OZAWA , Han Hiong CHEN , Katsu YOSHIMOTO
CPC分类号： F16D13/52 , F16D43/12 , F16D43/216
摘要： In a power transmission apparatus, a centrifugal clutch includes a holder, a press, a first spherical 14bodv 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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公开(公告)号：US20230136770A1
公开(公告)日：2023-05-04
申请号：US17918401
申请日：2020-09-14
发明人： Yoshihiko OZAWA , Han Hiong CHEN , Katsu YOSHIMOTO
摘要： A power transmission apparatus a centrifugal clutch including a holder and a press. The holder and the press are each circumferentially provided with protrusions fitted and attached to cut-outs of a clutch housing. The holder is an integrated assembly into which a mass that is being held is integrated. The integrated assembly and the press are non-connected separate components and are independently movable toward or away from each other.
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公开(公告)号：US20240344570A1
公开(公告)日：2024-10-17
申请号：US18751443
申请日：2024-06-24
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：US20220341474A1
公开(公告)日：2022-10-27
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
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：US20210356000A1
公开(公告)日：2021-11-18
申请号：US17336447
申请日：2021-06-02
IPC分类号： F16D13/56
摘要： A power transmission device has an interlocking member 9 moving a pressure member 5 from an inactive position to an active position. A release spring (m) applies an urging force, while allowing movements of the interlocking member 9 and the pressure member 5, until drive-side clutch plates 6 and driven-side clutch plates 7 reach an engaged state before the drive-side clutch plates 6 and the driven-side clutch plates 7 are pressed against each other. A clutch spring 11 is compressed in a process where the interlocking member 9 moves after the drive-side clutch plates 6 and the driven-side clutch plates 7 have reached the engaged state. The clutch spring applying a press-contact force between the drive-side clutch plates 6 and the driven-side clutch plates 7 while allowing movements of the interlocking member 9 and the pressure member 5. The set load of the clutch spring 11 is set to be smaller than the maximum load of the release spring (m).
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