Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1982-08-05
1986-03-11
Pate, III, William F.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74803, 74665L, F16H 128, F16H 3706
Patent
active
045746591
ABSTRACT:
A precision drive for positioning azimuth and elevation angles of a solar energy collector apparatus includes a casing mounted for rotation about a vertical shaft. The casing carries a pair of motor driven gear trains. A primary stage reduction gearing of each train comprises a cyclo-gear or a harmonic drive, while the secondary stage includes a monoplanetary gear train having a planet gear mounted to an eccentric carrier. The planet gear teeth simultaneously engage a fixed ring gear and a rotatable ring gear. The output of the primary stage drives the carrier, and the rotatable ring gear provides output rotation. One gear train engages a pinion fixed to the vertical shaft for rotating the casing about the shaft, while the rotatable ring gear of the other gear train engages a horizontal shaft for adjustment of the elevation angle.
REFERENCES:
patent: 2434082 (1948-01-01), Sharpe
patent: 3056315 (1962-10-01), Mros
patent: 3214999 (1964-04-01), Lapp
patent: 3320828 (1967-05-01), Grant
patent: 4050331 (1977-09-01), Braren
patent: 4383520 (1983-05-01), Huebl
patent: 4386540 (1983-06-01), Skaggs, Jr.
Novais David
Pate III William F.
Zahnraderfabrik Renk A.G.
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