Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural drive ratios other than unity
Patent
1990-02-15
1992-01-07
Braun, Leslie A.
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural drive ratios other than unity
475296, 475314, F16H 344
Patent
active
050786644
ABSTRACT:
A change-speed hub having a fixed shaft, a hub body rotatably mounted on the fixed shaft, a drive member rotatably mounted on the fixed shaft for transmitting a drive force to the hub body selectively through a plurality of transmission channels, a clutch for selecting one from the transmission channels, a plurality of sun gears rotatably mounted on the fixed shaft and having diameters differing from each other and a lock control mechanism for controlling locking and releasing of the sun gears relative to the fixed shaft. The sun gears have axial movements thereof substantially limited. On the fixed shaft, there is rotatably mounted a control member. The control member includes a first control portion for controlling the clutch and second and third control portions for activating the lock control mechanism for selectively locking the sun gears to the fixed shaft. The control member is operable externally of the hub body for providing a plurality of speeds through the selectio of the transmission channel and the selection of the sun gear to be located by the lock control mechanism.
REFERENCES:
patent: 1045236 (1912-11-01), Winkler
patent: 2301852 (1941-09-01), Brown
patent: 2441989 (1948-05-01), Brown
patent: 3995503 (1976-12-01), Schulz
patent: 4651853 (1987-03-01), Bergels
patent: 4721013 (1988-01-01), Steuer et al.
patent: 4727965 (1988-03-01), Zach et al.
Braun Leslie A.
Massey Ryan W.
Shimano Industrial Co. Ltd.
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