Continuously variable transmission
First Claim
1. An axial force generation (AFG) mechanism for a transmission, the AFG mechanism comprising:
- a traction ring having a first side, a middle portion, and a second side, wherein the first side comprises a set of ramps and wherein the second side comprises a traction surface;
a torsion spring having a first end and a second end;
wherein the middle portion of the traction ring comprises a recess adapted to receive the torsion spring;
a load cam roller retainer having a retainer extension adapted to cooperate with the recess of the traction ring for substantially housing the torsion spring;
wherein the retainer extension comprises a slit for receiving the second end of the torsion spring.
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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
17 Claims
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1. An axial force generation (AFG) mechanism for a transmission, the AFG mechanism comprising:
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a traction ring having a first side, a middle portion, and a second side, wherein the first side comprises a set of ramps and wherein the second side comprises a traction surface; a torsion spring having a first end and a second end; wherein the middle portion of the traction ring comprises a recess adapted to receive the torsion spring; a load cam roller retainer having a retainer extension adapted to cooperate with the recess of the traction ring for substantially housing the torsion spring; wherein the retainer extension comprises a slit for receiving the second end of the torsion spring. - View Dependent Claims (2, 3, 4, 5)
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6. An axial force generation (AFG) mechanism for a transmission, the AFG mechanism comprising:
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an annular ring having a first reaction surface; a traction ring having a second reaction surface, wherein the traction ring comprises an annular recess; a number of load cam rollers interposed between the first and second reaction surfaces; a load cam roller retainer adapted to retain the load cam rollers, the load cam roller retainer having a retainer extension; and a torsion spring, adapted to be at least partially housed between the annular recess and the retainer extension, wherein the retainer extension comprises a slit adapted to receive a first end of the torsion spring. - View Dependent Claims (7, 8, 9, 10, 11)
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12. An axial force generation (AFG) mechanism for a transmission, the AFG mechanism comprising:
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a hub shell cover having a first reaction surface, the hub shell cover adapted to couple to a hub shell; a traction ring having a second reaction surface, wherein the traction ring comprises an annular recess; a number of load cam rollers interposed between the first and second reaction surfaces; a load cam roller retainer adapted to retain the load cam rollers, wherein the load cam roller retainer comprises a retainer extension; and a torsion spring, adapted to be at least partially housed between the annular recess and the retainer extension, wherein the retainer extension comprises a slit adapted to receive a first end of the torsion spring. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification