Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1976-01-16
1977-09-27
Scott, Samuel
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
744248R, F16H 2702
Patent
active
040503194
ABSTRACT:
A linear actuator of the threaded shaft actuator type comprising a rotary threaded shaft and a special bearing unit secured to the member to be moved linearly, in which the bearing unit comprises a plurality of rollers each having a plurality of radial right flanges intermediate their ends spaced apart and scheduled to complement the pitch of the shaft threading for rolling engagement herewith, which rollers at their ends are formed with thrust bearing surfaces that are angled relative to their axes that ride on spaced apart annular raceways defined by an outer race structure which in turn is secured to the member to be moved linearly. The roller flanges are formed with thrust transmitting faces angled with respect to the longitudinal axes of the respective rollers and shaped to substantially complement the shaft threading. Canting of the rollers with respect to the outer race is avoided by making the angulation of the roller bearing surfaces greater than the angulation of the roller thrust transmitting faces.
REFERENCES:
patent: 3004445 (1961-10-01), Mondon
patent: 3244021 (1966-04-01), Antila
patent: 3861221 (1975-01-01), Stanley
patent: 3861226 (1975-01-01), Stanley
Ratliff, Jr. Wesley S.
Scott Samuel
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