Continuously variable transmission
AssigneeLuk Lamellen und Kupplungsbau GmbH
InventorsWolfgang Reik, Ruben Schmitt, Wolfgang Haas, Friedrich Gerhardt
Life of this patent
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Abstract
A continuously variable drive mechanism has a variator with two conical disks, at least one of the conical disks being axially movable, a belt running at a variable running radius axially between the conical disks, and a disk-tightening device pushing the axially movable conical disk against the other of the two conical disks, thereby applying axial pressure to the flexible torque-transmitting device. The disk-tightening device works with guiding means converting a rotational displacement into an axial displacement.
Claims65
A continuously variable belt-drive mechanism with
- a variator having at least two conical disks arranged concentrically on a driving shaft and receiving a torque from a prime mover unit, at least one of the conical disks being axially movable on the driving shaft,
- a belt running at a variable running radius axially between the conical disks,
- at least one disk-tightening device pushing the axially movable conical disk against the other of the two conical disks and thereby effecting a frictional engagement between the conical disks and the belt, the frictional engagement enabling the belt to transmit the torque to at least one additional pulley of the belt-drive mechanism,
- comprising the improvement that the disk-tightening device includes first and second guiding means in a cooperative arrangement where the first guiding means is solidly connected to the at least one axially moveable conical disk, the second guiding means is axially fixed on the driving shaft, the torque produces a relative rotational displacement between the first and second guiding means, and the relative rotational displacement produces an axial displacement of the axially movable conical disk.
A continuously variable belt-drive mechanism with
- a variator having at least two conical disks seated concentrically on a driving shaft and receiving a torque from a prime mover unit, at least one of the conical disks being axially movable on the driving shaft,
- a belt running at a variable running radius axially between the conical disks,
- at least one disk-tightening device pushing the axially movable conical disk against the other of the two conical disks and thereby effecting a frictional engagement between the conical disks and the belt, the frictional engagement enabling the belt to transmit the torque to at least one additional pulley of the belt-drive mechanism,
- comprising the improvement that the disk-tightening device includes first and second guiding means in a cooperative arrangement where the first guiding means is solidly connected to the at least one axially moveable conical disk, the second guiding means is axially fixed on the driving shaft, an external transmission-ratio control means produces a relative rotational displacement between the first and second guiding means, and the relative rotational displacement produces an axial displacement of the axially movable conical disk.
Dependencies are inferred from the claim text.