Actuator for driving movable object and motion guide apparatus for guiding motion of movable object
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United States of America Patent
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May 1, 2012
Grant Date -
Jun 28, 2007
app pub date -
Nov 15, 2004
filing date -
Dec 25, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
An actuator has a hollow track rail 6 having a slit 8 extending in an axial direction thereof, a movable block 7 disposed inside the track rail 6 to be movable along the track rail, and a ball screw mechanism for moving the movable block 7 along the axial direction of the track rail 6. The track rail has, in a section perpendicular to the axial direction of the track rail, a guide portion 9 for guiding movement of the movable member 7 and an extension 11 extending from the guide portion 9 so as to cover the movable member, and a width W1 of the slit 8 of the track rail formed between the opposed extensions 11 is narrower than a width W2 of the movable member. Accordingly, the actuator can provide a high rigidity in spite of compact outer dimension.
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