Positioning actuator

Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary

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Details

74 8915, 74640, 192143, F16H 2702

Patent

active

053700112

ABSTRACT:
The present disclosure concerns an actuator for converting rotary movement into linear movement. The actuator comprises a prime mover turning a reduction gear assembly which, in turn, drives a mechanical transmission including a linearly moving control element. To achieve precise movement of the control element to a desired position, and to ensure the desired position is retained as exactly as possible, a reduction gear assembly which is self-locking with respect to the maximum back-driving torque exerted on the reduction gear assembly by the mechanical transmission, is combined with a low friction, non-self-locking mechanical transmission. Preferably, the reduction gear assembly is implemented in the form of a strain wave reduction gear set and the mechanical transmission element is implemented in the form of a cooperating ballscrew and ballnut.

REFERENCES:
patent: 2444886 (1948-07-01), Vickers
patent: 2620683 (1952-12-01), Geyer
patent: 2660029 (1953-11-01), Geyer
patent: 2932986 (1960-04-01), Musser
patent: 2943513 (1960-07-01), Musser
patent: 2966070 (1960-12-01), Wise
patent: 3077792 (1963-02-01), Kinderman
patent: 3178958 (1965-04-01), Beck
patent: 3449971 (1969-06-01), Posh
patent: 3548227 (1969-04-01), Woodward
patent: 4557153 (1985-12-01), Ulbing
patent: 5150872 (1992-09-01), Isomura
Technische Rundschau, "Prazisionsgetriebe fur hohe Drehmomente", Peter Eisenring, Bd. 77, Nr. 19, Mai 1985, Bern Ch, Seiten 44-49.

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