LINEAR-ROTARY ACTUATOR

摘要

A linear-rotary actuator includes a rotor and a stator. The rotor includes an output shaft, and makes a linear motion in an axial direction and a rotary motion in a circumferential direction. The rotor includes N and S pole portions alternating with each other in the axial direction as seen in the circumferential direction and alternating with each other in the circumferential direction as seen in the axial direction. The stator includes a linear motion winding, a rotary motion winding, and protruding cores. The protruding cores protrude toward an inner circumferential side of a radial direction to be opposed to the rotor. The protruding cores are arranged in the axial direction and in the circumferential direction, and displaced in the axial direction to form a circumferential line skewed relative to a direction in which the rotor makes the rotary motion.

主权项

1. A linear-rotary actuator comprising:
a rotor comprising an output shaft, the rotor being configured to make a linear motion in an axial direction of the output shaft and make a rotary motion in a circumferential direction of the output shaft, the rotor comprising N pole portions and S pole portions alternating with each other in the axial direction as seen in the circumferential direction and alternating with each other in the circumferential direction as seen in the axial direction; and a stator comprising:
a linear motion winding to generate a first magnetic field to cause the rotor to make the linear motion;a rotary motion winding to generate a second magnetic field to cause the rotor to make the rotary motion; anda plurality of protruding cores protruding toward an inner circumferential side of a radial direction of the output shaft to be opposed to the rotor, the protruding cores being arranged in the axial direction and in the circumferential direction, the protruding cores arranged in the circumferential direction being displaced in the axial direction so as to form a circumferential line of arrangement that is skewed relative to a direction in which the rotor makes the rotary motion.