Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1982-02-25
1985-10-29
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74804, F16H 128
Patent
active
045494509
ABSTRACT:
A speed reducer with an orbital rotor, mounted for free rotation on a rotor drive wheel driven along an orbital path, has a perimeter defined by an epitrochoidal curve that simultaneously engages each of a series of rollers arranged in a circle around the rotor.
The rotor drive wheel is driven by a compensation coupler that prevents radial forces of the rotor and the rotor drive wheel. The drive shaft provides only a rotary thrust on the rotor drive wheel and is shielded from reaction movements of the rotor and rotor drive wheel.
The rotor drive wheel is driven by a variable-length crank arm that extends into a radial opening in the rotor drive wheel and makes sliding engagement with opposite faces of the radial opening. The driving surfaces that engage the faces of the radial opening form, in a plane perpendicular to the axis of the drive shaft, arcs of a circle equal in diameter to the width of the radial opening. The crank arm includes an expansion slot that divides it into two fingers that embrace opposite sides of the radial opening. For smaller units, the spring quality of the fingers is relied upon to maintain firm engagement between the fingers and the faces of the slot.
REFERENCES:
patent: 1942794 (1934-01-01), Benson
patent: 2250259 (1941-07-01), Foote
patent: 2303365 (1942-12-01), Karlsen
patent: 3045503 (1962-07-01), Kiessling
patent: 3144791 (1964-08-01), Menge
patent: 3429393 (1969-02-01), Lorence
patent: 3783712 (1974-01-01), Colinet
patent: 3998112 (1976-12-01), Pierrat
patent: 4227741 (1980-10-01), Gross et al.
patent: 4348918 (1982-09-01), Fukui
patent: 4371207 (1983-02-01), Wilking et al.
Barrett E. Thorpe
Braun Leslie A.
Rolnicki Joseph M.
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