Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1981-10-07
1985-06-04
Herrmann, Allan D.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74798, F16H 128, F16H 1306
Patent
active
045206937
ABSTRACT:
A high ratio drive wherein a housing supports a first fixed annular toothed raceway and rotatably supports a second axially aligned toothed raceway. A coupled pair of axially aligned toothed wheels are disposed within and having rolling contact and tooth interengagement with the toothed raceways, respectively. The housing supports a rotatable output shaft that is secured concentrically to the second toothed wheel. A rotatable drive shaft having drive spokes secured thereto is supported by the housing in axial alignment with the output shaft. The drive spokes contact the bores of roller bearings that are mounted in each toothed wheel. Rotation of the drive shaft will cause the drive spokes to impart a radial drive force to the toothed wheels thereby forcing them to roll on their respective toothed raceways. This transmits differential rotation to the second toothed raceway and output shaft at a high ratio.
A modified form of the drive has a toothed wheel eccentrically disposed in a fixed toothed raceway. An output shaft supported for rotation concentrically to a toothed raceway, an arm is secured to the output shaft, the outer end of the arm supports a roller that is radially movable within a slot disposed on toothed wheel. Uniform rotation of the toothed wheel will transmit non-uniform angular motion to the output shaft at a high ratio.
REFERENCES:
patent: 2170591 (1939-08-01), Perry
patent: 3004453 (1961-10-01), Lang
patent: 3056315 (1962-10-01), Mros
patent: 3192799 (1965-07-01), Pamplin
patent: 3324746 (1967-06-01), Kari
patent: 3381549 (1968-05-01), Hirakawa
patent: 3413896 (1968-12-01), Wildhaber
patent: 4050331 (1977-09-01), Braren
patent: 4112788 (1978-09-01), Sfredda
patent: 4184388 (1980-01-01), Sfredda
patent: 4271726 (1981-06-01), Ryffel
"Design Engineering", Magazine, Oct. 1980 issue, p. 55; Jan. 1981 issue, p. 49.
Compudrive Corp. Brochure, "Gearless Speed Reductions".
Andrews Stephen B.
Herrmann Allan D.
LandOfFree
High ratio drive does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High ratio drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High ratio drive will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-822726