Drum type switch-over mechanism for a speed change device

Details Drum type switch-over mechanism for a speed change device Drum type switch-over mechanism for a speed change device

1983-04-01

1985-04-16

Staab, Lawrence J.

Machine element or mechanism

Control lever and linkage systems

Multiple controlled elements

743375, 74801, 74785, 74142, 74475, 192 431, G05G 114, F16H 128, F16D 4116

Patent

active

045108200

ABSTRACT:
An improved drum type switch-over mechanism for a speed change device including a speed change pedal shaft and a speed change drum both of which are rotatably supported in axial alignment with one another on a transmission case and which are operatively connected to one another by way of an intermittent feed mechanism so as to allow the speed change drum to be rotated by a unit angle in a predetermined direction on every reciprocatable rotation of the pedal shaft by a predetermined angle. The improvement consists in that the pedal shaft is located in axial alignment with an input shaft of the intermittent feed mechanism, that a sun gear is formed on the input shaft while a plurality of planet gears are mounted on the pedal shaft for meshing engagement with the sun gear, and that a ring gear meshing with the planet gears is firmly fixed to the transmission case. This arrangement of the switch-over mechanism enables the pedal shaft, the input shaft and the speed change drum to be disposed within a limited space, realizing a very compact structure of the switch-over mechanism, a substantial reduction of its mounting space and smaller design dimensions of the speed change device.

REFERENCES:
patent: 2027655 (1936-01-01), Stoeckicht
patent: 2744432 (1956-05-01), Rueb
patent: 2943710 (1960-07-01), Lindmark
patent: 3421384 (1969-01-01), Okamota et al.
patent: 4098135 (1978-07-01), Werner
patent: 4125032 (1978-11-01), Shuler

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