Stepless transmission mechanism

Planetary gear transmission systems or components – Cyclical or intermittent drive – With means to adjust cycle or drive during operation

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Details

475 17, F16H 5517

Patent

active

049698605

ABSTRACT:
An stepless transmission mechanism comprises an input shaft rotatably supported by a case, an input frame secured to the input shaft so as to be rotated, an input planet shaft rotatably supported by the input frame, an output shaft rotatably supported by the case and extending coaxially to the input shaft, an output frame rotatably supported by the input shaft and swinging relative to the input frame, an output planet shaft rotatably supported by the output frame, an input rotation transmitting means for transmitting the rotation of the input shaft to the input planet shaft, an output rotation transmitting means for transmitting the rotation of the output planet shaft to the output shaft, a structural body which is composed of a plurality of constituent mechanisms which perform rotation speed modulation in the manner of an exponential function by pairs of non-circular gears inherently having a rotation speed ratio which periodically changes in the manner of an exponential function, so that the body performs stepless speed changing operation in which the relative rotation speed ratio between both the planet shafts is set at the value of an exponential function e.sup.k.multidot..alpha. where .alpha. denotes the angle of the relative swing between both the frames and K denotes a rotation speed modulation coefficient which can be optionally preset so that the pairs of non-circular gears inherently have the coefficient, and fly-apart weights provided between the frames to apply a swing torque to the frames by the centrifugal forces of fly-apart weights on the basis of the rotation speed of the input shaft.

REFERENCES:
patent: 1791386 (1931-02-01), Sprigg
patent: 2239313 (1941-04-01), Beschkline
patent: 2439077 (1948-04-01), Conner
patent: 3075409 (1963-01-01), Amsler
patent: 4685348 (1987-08-01), Takami
patent: 4765195 (1988-08-01), Takami

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