Continuously variable transmission
First Claim
1. A continuously variable transmission (CVT) comprising:
- a first traction ring;
a second traction ring;
a plurality of power rollers interposed between and in contact with the first and second traction rings, wherein the power rollers are configured to spin about a tiltable axis;
first and second torsion springs, wherein the first and second traction rings each include a recess adapted to receive and partially house the first and the second torsion springs, respectively;
a first roller cage having a circumferential extension, said extension having a slit for receiving the first torsion spring, said extension adapted to cooperate with the first traction ring for substantially housing the first torsion spring in the first traction ring; and
a second roller cage having a circumferential extension, said extension having a slit for receiving the second torsion spring, said extension adapted to cooperate with the second traction ring for substantially housing the second torsion spring in the second traction ring.
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Accused Products
Abstract
Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT). In one embodiment, a main axle is adapted to receive a shift rod that cooperates with a shift rod nut to actuate a ratio change in a CVT. In another embodiment, an axial force generating mechanism can include a torsion spring, a traction ring adapted to receive the torsion spring, and a roller cage retainer configured to cooperate with the traction ring to house the torsion spring. Various inventive idler-and-shift-cam assemblies can be used to facilitate shifting the ratio of a CVT. Embodiments of a hub shell and a hub cover are adapted to house components of a CVT and, in some embodiments, to cooperate with other components of the CVT to support operation and/or functionality of the CVT. Among other things, shift control interfaces and braking features for a CVT are disclosed.
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Citations
9 Claims
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1. A continuously variable transmission (CVT) comprising:
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a first traction ring; a second traction ring; a plurality of power rollers interposed between and in contact with the first and second traction rings, wherein the power rollers are configured to spin about a tiltable axis; first and second torsion springs, wherein the first and second traction rings each include a recess adapted to receive and partially house the first and the second torsion springs, respectively; a first roller cage having a circumferential extension, said extension having a slit for receiving the first torsion spring, said extension adapted to cooperate with the first traction ring for substantially housing the first torsion spring in the first traction ring; and a second roller cage having a circumferential extension, said extension having a slit for receiving the second torsion spring, said extension adapted to cooperate with the second traction ring for substantially housing the second torsion spring in the second traction ring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification