Rotational to linear movement actuator with limiter

Details Rotational to linear movement actuator with limiter Rotational to linear movement actuator with limiter

1995-07-24

1997-06-03

Pitts, Andrea L.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

74640, F16H 2702

Patent

active

056343736

ABSTRACT:
An actuator converts rotational movement to linear movement and at the same time transmits a limited linear force without requiring slip clutches or the like. The actuator has an electric motor in a fixed housing with a drive shaft on a longitudinal axis. A drive gear, substantially free of backlash, is connected to the drive shaft and has an output connection to drive a drive nut with an internal screw thread on the rotary axis. An output shaft has an external screw thread engaging with the internal screw thread of the drive nut and moves linearly when the drive nut is rotated. A voltage control system allows the voltage to the motor to be set so that for a set voltage there is a predetermined longitudinal force on the output shaft.

REFERENCES:
patent: 4716785 (1988-01-01), Godai et al.
patent: 4833941 (1989-05-01), Leppanen et al.
patent: 4909099 (1990-03-01), Ulbing
patent: 4951518 (1990-08-01), Hendershot
patent: 5370011 (1994-12-01), Gilges et al.

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