Linear actuator and rocking controller for railway vehicle
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United States of America Patent
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Dec 10, 2013
Grant Date -
May 9, 2013
app pub date -
Jun 27, 2011
filing date -
Jul 9, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
The linear actuator has a hollow main body having open and closed ends, a cylinder fixed to a closed side in the body and having an open end at open side, a linear motion rod having one end extending from the open end of the body and a wear ring on an outer circumference of the other end and slidably housed in the cylinder, and a hollow shaft rotatably supported in the body, wherein the shaft has magnet on outer circumferential surface, a winding section included on an inner surface of the body and the magnet configure a hollow motor, a nut coaxially fixed to the shaft and a screw on an outer surface of the linear motion rod are engaged with each other to configure a rotation/linear motion converter, and oil seals seal a gap between the shaft and the body in both sides are included.
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