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Browse Prior Art Database

Linear/ Rotary Actuator

IP.com Disclosure Number: IPCOM000049191D
Original Publication Date: 1982-May-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Passafiume, JE: AUTHOR

Abstract

A device incorporating a rotating armature electric motor and capable of yielding either rotary or linear motion is disclosed. This device eliminates the need for two different mechanisms to provide both linear and rotary motion in such environments as automated assembly apparatus.

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Linear/ Rotary Actuator

A device incorporating a rotating armature electric motor and capable of yielding either rotary or linear motion is disclosed. This device eliminates the need for two different mechanisms to provide both linear and rotary motion in such environments as automated assembly apparatus.

The motor housing 1 is fixed to a support member with the armature 3 rotating within the windings of the motor 2. The armature 3 is rotatably supported by bearings 4 and, on at least one end of the motor housing, the armature extends outwardly from the motor housing at a point 8. The interior of the armature is at least partially threaded and may be threaded through its entire length to conform with the threads of a leadscrew 5. Thus, the armature 3 becomes a rotating nut on leadscrew 5.

Outboard of the motor housing 1, two control pins 6 and 7 are alternately engageable with the leadscrew. Pin member 6 may be engaged with a channel cut into leadscrew 5 to prevent leadscrew 5 from rotating as armature 3 is caused to rotate. The effect of that would be to thread the leadscrew 5 axially as a result of the rotation of armature 3.

If pin 6 is withdrawn from the channel in leadscrew 5 and pin 7 engaged. effectively locking armature extension 8 and leadscrew 5, then leadscrew 5 will be prevented from relative rotational motion with respect to armature 3 and will rotate therewith as the armature is rotated.

By merely controlling the insertion of control pin 6 or contro...