Electric actuator
AssigneeNtn Corporation
InventorsShinsuke Hirano, Yoshinori Ikeda, Tatsunori Shimizu
Life of this patent
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Abstract
An electric actuator 1 includes a motor 5 and a motion conversion mechanism 4 that converts a rotary motion generated by driving the motor 5 into a predetermined motion. A magnet 31 as a sensor target is disposed on a movable part performing a predetermined motion, and magnetic sensors 32 detecting position information of the magnet 31 is disposed around the magnet 31. A magnetic shield plate 34 is disposed between the motor 5 and the magnetic sensors 32, and an outer surface 5e of the motor 5 and an inner surface 34a of the magnetic shield plate 34 face each other with a predetermined gap 35 therebetween.
Claims19
An electric actuator comprising:
- a motor;
- and
- a motion conversion mechanism configured to convert a rotary motion generated by driving the motor into a predetermined motion,
- wherein the motion conversion mechanism has a movable part configured to perform the predetermined motion,
- the movable part is provided with a magnet as a sensor target, and a magnetic sensor configured to detect position information of the magnet is disposed around the magnet,
- a magnetic shield plate is disposed between the motor and the magnetic sensor, and
- an outer surface of the motor and an inner surface of the magnetic shield plate face each other with a predetermined gap between the outer surface of the motor and the inner surface of the magnetic shield plate.
Dependencies are inferred from the claim text.