Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1976-11-19
1978-06-06
Scott, Samuel
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74750R, F16H 128, F16H 344
Patent
active
040928780
ABSTRACT:
A planetary gear system within a vehicle wheel has a sun gear at the wheel axis driven by a fluid motor and further includes a ring gear secured to the wheel rim. Planet gears, engaging both the sun gear and ring gear, are mounted on a carrier which is revolvable as the planet gears orbit around the sun gear while transmitting drive from the motor to the wheel with a speed reduction and a corresponding torque amplification. The carrier is not tightly restrained in either the radial or axial direction enabling positional self-adjustment to relieve stress concentrations at gear teeth. Limits for the axial and radial play of the floating carrier are fixed by positioner means defining an annular groove into which the radially innermost edge of the carrier is loosely received, thrust bearing means such as thrust pins or annular thrust rings being situated within the groove at each side of the carrier edge. Situating the positioner means at the minimum diameter portion of the carrier minimizes friction, wear, power dissipation and heating as that portion of the carrier turns at a smaller velocity than the more outward portions of the carrier.
REFERENCES:
patent: 2959073 (1960-11-01), Doerfer et al.
patent: 3115204 (1963-12-01), Dence
patent: 3150532 (1964-09-01), Bixby
patent: 3184994 (1965-05-01), Stahl
patent: 3292460 (1966-12-01), Fritsch
patent: 3315546 (1967-04-01), Fritsch
patent: 3477547 (1969-11-01), Kress et al.
patent: 3780601 (1973-12-01), Dach et al.
patent: 3785157 (1974-01-01), Kittle et al.
Caterpillar Tractor Co.
Chandler Lance W.
Scott Samuel
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