Misalignment-tolerant cable actuator
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsPhilippe Garrec, Fares Kfoury
Life of this patent
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Abstract
A cable actuator comprising a chassis (1), a screw (2) mounted rotatably on the chassis and driven by an electric motor, a nut (4) engaging with the screw and associated with anti-rotation means such that a rotation of the screw, under the action of the motor, results in an axial movement of the nut, and two substantially parallel cables (10) coupled to the nut on either side of same. The cables are linked to an anchoring member (20; 30; 40) that is interposed between the nut and the cables, the anchoring member being secured to the nut while also being movable relative to same.
Claims12
A cable actuator comprising:
- a chassis;
- a screw which is fitted so as to rotate on the chassis and is driven by an electric motor;
- a nut which engages the screw and which engages anti-rotation means, such that rotation of the screw under action of the motor causes axial displacement of the nut;
- two substantially parallel cables, each coupled to the nut on a respective side of the nut;
- wherein the cables are connected to an anchorage unit which is interposed between the nut and the cables, the anchorage unit being integral with the nut whilst being mobile relative to the nut;
- wherein the cables are each wound around a respective pulley, the two pulleys being integral with a same shaft;
- and
- wherein the anchorage unit is suspended on the nut by two parallel connecting elements which are coupled firstly to the nut on respective sides of the nut, and secondly to the anchorage unit, so that the anchorage unit is movable with respect to the nut along with a movement of the connecting elements so as to absorb offsetting of a rotation axis of the same shaft to which the two pulleys are integral;
- and
- wherein each connecting element is pivotally coupled at one end to the nut and at the other end to the anchorage unit.
A cable actuator comprising:
- a chassis;
- a screw fitted so as to rotate on the chassis and is driven by an electric motor;
- a nut coupled with the screw, such that rotation of the screw axial displaces the nut;
- two substantially parallel cables that are coupled to the nut on both sides of the nut;
- wherein the cables are connected to an anchorage unit that is interposed between the nut and the cables, the anchorage unit being integral with the nut while mobile relative to the nut;
- wherein each cable is wound around a respective one of two pulleys, the two pulleys integral with a common shaft;
- and
- wherein the anchorage unit is suspended on the nut by two parallel connecting elements that are coupled first to the nut on sides of the nut, and second to the anchorage unit, so that the anchorage unit is movable with respect to the nut along with a movement of the connecting elements so as to absorb offsetting of a rotation axis of the common shaft;
- and
- wherein each connecting element is pivotally coupled at one end to the nut and at the other end to the anchorage unit.
Dependencies are inferred from the claim text.