Actuator capable of moving in axial and rotational directions

Details Actuator capable of moving in axial and rotational directions Actuator capable of moving in axial and rotational directions

H - Electricity

02

K

H02K 33/02 (2006.01) H02K 33/16 (2006.01)

Patent

CA 2493603

An actuator includes a casing, a stationary member having a coil member mounted in the casing and a movable member having a moving element supported by the casing. The moving element has a shaft and is supported by the casing so as to be moved in an axial direction of the shaft and in a rotational direction having the axial direction of the shaft as its rotational axis. The moving element is moved in the axial direction and in the rotational direction by electric current flowing through the coil member. The stationary member includes a first stationary member for imparting to the movable member, a force oriented in the axial direction and a second stationary member for imparting to the movable member a force oriented in the rotational direction. The coil member includes a first coil member for exciting a first magnetic path passing through the first stationary member and a second coil member for exciting a second magnetic path passing through the second stationary member. The first stationary member includes a pair of first stationary elements provided symmetrically with respect to the rotational axis and the second stationary member includes a pair of second stationary elements provided symmetrically with respect to the rotational axis.

L'invention concerne un actionneur, qui comprend un boîtier, une pièce d'élément fixe comportant un enroulement fixe dans le boîtier, et une pièce d'élément mobile comportant un élément mobile que soutient le boîtier. L'élément mobile présente un arbre, et il est soutenu par le boîtier de manière à se déplacer dans la direction axiale de l'arbre et à tourner autour de l'arbre en ayant cet axe de rotation. Lorsque l'enroulement est excité, l'élément mobile se déplace dans la direction axiale et la direction de rotation. La pièce d'élément fixe comporte une première partie de pièce d'élément fixe pour l'application d'une force axiale à la pièce et une seconde partie de pièce d'élément fixe pour l'application d'une force de rotation à la pièce. L'enroulement comprend un première pièce d'enroulement pour l'excitation d'un premier trajet magnétique qui traverse la première partie de pièce d'élément fixe, et une seconde pièce d'enroulement pour l'excitation d'un second trajet magnétique qui traverse la seconde partie de pièce d'élément fixe. On augmente ainsi le degré de liberté de contrôle de fonctionnement de l'actionneur, et la vibration induite par une force d'inertie axiale est par ailleurs réduite.

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