Continuous speed-shifting device

Details Continuous speed-shifting device Continuous speed-shifting device

1990-09-04

1992-05-12

Herrmann, Allan D.

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Nonplanetary transmission is belt or chain gearing

475218, F16H 3706

Patent

active

051122839

ABSTRACT:
The continuous speed-shifting device of the present invention is provided with the first, second and third rotary shafts, a differential gear mechanism having the first gear element connected to the third rotary shaft, a variable speed pulley mechanism which connects the second and the third rotary shafts speed-changeably by a belt, a driving power gear mechanism which connects the first rotary shaft to the second or the third gear element of the differential gear mechanism and a circulating power gear mechanism which connects the second rotary shaft to the third or the second gear element of the differential gear mechanism. According to switching of the advancing and the retreating, the first rotary shaft and the driving power gear mechanism or the second rotary shaft and the circulating power gear mechanism are connected or disconnected by the gear clutch. Large driving power transmitted from the first rotary shaft to the differential gear mechanism is passed through the gear mechanism but small circulating power returned to the first rotary shaft from the differential gear mechanism is always passed through the pulley mechanism. When the first rotary shaft and the driving power gear mechanism or the second rotary shaft and the circulating power gear mechanism are connected with each other by a gear clutch, rotation of the third rotary shaft is made zero to obtain a neutral state.

REFERENCES:
patent: 3340749 (1967-09-01), Magg et al.
patent: 4936165 (1990-06-01), Doyle et al.

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