Positioning actuator

Details Positioning actuator Positioning actuator

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 21/16 (2006.01) F16H 25/20 (2006.01) F16H 49/00 (2006.01) H02K 7/06 (2006.01)

Patent

CA 2076071

An actuator is provided herein for converting rotational movement into precise linear movement, when the rotational movement is relatively small with respect to linear force. The actuator includes a prime mover, and a self-locking strain wave reduction gear assembly including an elliptical wave generator which is turned by the prime mover. A non-self-locking mechanical transmission is provided which includes a control element which is adapted for linear movement, the strain wave reduction gear assembly driving the mechanical transmission. The strain wave reduction gear assembly is self-locking with respect to back-driving torque exerted on the strain wave reduction gear assembly by the mechanical transmission. This structure achieves, amongst other objectives, an optimal positioning accuracy of the control element and ensures that the achieved position is retained as exactly as possible.

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