Actuator
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United States of America Patent
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Nov 1, 2016
Grant Date -
Jun 12, 2014
app pub date -
May 25, 2012
filing date -
Jul 13, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An actuator (10) includes a guide apparatus (30) that guides a rod 11 in a Y-axis direction. The guide apparatus (30) includes a slider (31), a rail (60) formed of a steel material, and balls (rolling elements) formed of a steel material. The slider (31) is supported by the rail (60) through the balls. Accordingly, even if torque originating from a rotation of the output shaft of a motor unit (20) is applied to the slider (31) through a ball screw shaft (71), the slider (31) does not move around the output shaft with respect to the rail (60). Hence, torque originating from the rotation of the output shaft is not likely to be transmitted to the rod (11) through the guide apparatus (30), thereby suppressing an occurrence of the wobbling of the leading end of the rod (11). In addition, a reduction of the work precision of the actuator (10) is preventable.
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