192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1997-02-26
1998-11-03
Bonck, Rodney H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
475298, B60K 4126
Patent
active
058295631
ABSTRACT:
A hub transmission with a coaster brake unit includes a hub axle, a drive member rotatably mounted around the hub axle, a hub body rotatably mounted around the hub axle, and a planetary gear mechanism coupled between the drive member and the hub body for communicating rotational force from the drive member to the hub body through multiple rotational force transmission paths. The planetary gear mechanism includes a planet gear supported by a planet gear rack for rotation around the hub axle, and a ring gear engaging the planet gear. The gear rack includes a depression formed in a peripheral direction thereof, and the ring gear includes a serration formed in a peripheral direction thereof. A clutch having an engagement component is movable in a direction of an axis of the axle between a first position and a second position. The engagement component engages with the depression in the gear rack for transmitting forward rotational power to the gear rack when the clutch is located in the first position, and the engagement component engages with the serration in the ring gear for transmitting forward rotational power to the ring gear when the clutch is located in the second position. A forcible movement device forcibly moves the clutch from the depression toward the serration when reverse rotational power is applied to the drive member.
REFERENCES:
patent: 3937309 (1976-02-01), Schulz et al.
patent: 4721013 (1988-01-01), Steuer et al.
patent: 4973297 (1990-11-01), Bergles
patent: 5078664 (1992-01-01), Nagano
patent: 5445573 (1995-08-01), Nurnberger
Bonck Rodney H.
Deland James A.
Shimano Inc.
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