Adaptive-ratio transmission

Machine element or mechanism – Gearing – Plural power paths to and/or from gearing

Patent

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Details

74793, F16H 374

Patent

active

048054887

ABSTRACT:
An automatically compliant self-adjusting geared transmission mechanism is described that involves no controls of any kind and provides a range of stepless variation in the ratio of its output-torque to its input-torque together with the inversely corresponding variation in output to input rotary-speed ratio. The transmission mechanism comprises coaxial rotatably supported adjacent input and output shafts, each carrying a sun-gear fixedly mounted on its mutually proximate end. The sun-gears mesh with corresponding planetary gears of a planetary gear-spool rotatably mounted on a rotor which is itself freely rotatable about the sun-gears' axis. The proportions of the gear diameters are designed so as to develop a torque in the rotor that balances its torque reaction to the output-torque of the gear-train, while coincidentally providing essential variability to the output to input rotary-speed ratio. Input power automatically divides variably between the planetary gear-spool and the rotor, responsive to rotary-speed of the rotor, to be separately conditioned by their respective mechanical advantages so that when recombined at the output, the resulting output-torque matches the load-torque and the resulting rotary-speed absorbs the power available. The range of output to input ratios provided are increased by coupling together a plurality of the transmission mechanisms, as aligned serially, or by proportioned gears at the inputs and outputs aligned in parallel.

REFERENCES:
patent: 1741855 (1929-12-01), Lyman
patent: 1883355 (1932-10-01), Edberg
patent: 3728911 (1973-04-01), Granville
patent: 4038886 (1977-08-01), Wittren
patent: 4191070 (1980-03-01), McKinniss

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