Linear actuator
AssigneeSMC Corporation
InventorMitsuhiro Someya
Life of this patent
Estimating the term…
Abstract
A linear actuator comprises a rotary driving source, a tube member which is supported by a support rib extending in a substantially horizontal direction along a side section of a base member, an internal movable member and an external movable member which are integrally displaceable along the tube member under the magnetic coupling action, a slide screw shaft which is connected to a drive shaft of the rotary driving source and which transmits the rotary driving force to the internal movable member, and a slide screw nut for the slide screw shaft to be screwed therein for converting the rotary motion into the rectilinear motion.
Claims11
A linear actuator comprising:
- a base mechanism;
- a rotary driving source which is connected to said base mechanism;
- a tube member which extends in an axial direction of said base mechanism and which is supported by said base mechanism;
- an internal movable member which is provided in said tube member and which is displaceable along said tube member, said internal movable member being disposed in sliding contact with an inner wall surface of said tube member, wherein a chamber of said tube member is divided by the internal movable member into a first chamber and a second chamber;
- an external movable member which is provided outside of said tube member and which is displaceable in an axial direction of said tube member integrally with said internal movable member under a magnetic coupling action of said internal movable member;
- and
- a rotary driving force-transmitting mechanism which transmits rotary driving force of said rotary driving source to said internal movable member,
- wherein said base mechanism has a communicating passage therein for communicating said first chamber and said second chamber disposed in said tube member.
Dependencies are inferred from the claim text.