Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1977-03-28
1979-05-22
Wyche, Benjamin W.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74805, F16H 128
Patent
active
041552768
ABSTRACT:
This two-stage speed reduction transmission has an input shaft which drives a first-stage fly-wheel rotating on a primary axis but having a rim annularly grooved eccentrically on a secondary axis to carry bearing balls engaging a correspondingly annularly-grooved internally-toothed ring gear which is also externally-toothed to mesh with stationary internal teeth in the housing, so that it can oscillate but not rotate. Meshing with this first-stage ring gear is a first-stage spur gear with a lesser number of teeth also rotatable upon the primary axis, the eccentricity between the primary and secondary axes being sufficient to permit clearance of the first-stage spur gear with the teeth of the first-stage internal ring gear on the side opposite its meshing location therewith. Drivingly connected to the first-stage spur gear to rotate on the primary axis is a second-stage flywheel also externally-grooved upon the secondary axis to receive bearing balls engaging a similar second-stage internal ring gear similarly meashing with and diametrically-oppositely clearing the teeth of a second-stage spur gear rotating on the primary axis and drivingly connected to an output shaft.
REFERENCES:
patent: 1282172 (1918-10-01), Beirns
patent: 1942795 (1934-01-01), Benson
patent: 3918326 (1975-11-01), Kida et al.
Bugbee Willis
McKenzie, Jr. Frank H.
Wyche Benjamin W.
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