Clamping force generator
First Claim
1. A clamping force generation mechanism for a transmission, the mechanism comprising:
- 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 groove, the second reaction surface comprising a set of ramps and a plurality of flat surfaces, the traction ring further comprising a traction surface;
a plurality of load cam rollers interposed between the first and second reaction surfaces;
a load cam roller retainer adapted to retain the plurality of load cam rollers, wherein the load cam roller retainer comprises a retainer tab extension; and
a spring, adapted to be at least partially housed in the annular groove, the retainer tab extension configured to engage a first end of the spring, the traction ring adapted to engage a second end of the spring, wherein the plurality of load cam rollers are configured to roll up the set of ramps and come to rest on the plurality of flat surfaces of the traction ring.
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Accused Products
Abstract
Mechanisms and methods for clamping force generation are disclosed. In one embodiment, a clamping force generator includes a spring coupled to a traction ring and to a load cam roller cage. The traction ring can be provided with a recess to receive the spring. In some embodiments, a relatively short spring is provided. In other embodiments, a spring couples to a wire and the spring-wire combination couples to the traction ring and the load cam roller cage. In some embodiments, the load cam roller cage is provided with tabs adapted to engage the wire and/or the spring. In yet other embodiments, the traction ring is configured to receive a dowel pin for coupling to the spring. One or more of the tabs can include a tab notch that cooperates with a stop pin coupled to the traction ring to provide adjustment of the travel of the load cam roller cage.
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Citations
20 Claims
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1. A clamping force generation mechanism for a transmission, the 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 groove, the second reaction surface comprising a set of ramps and a plurality of flat surfaces, the traction ring further comprising a traction surface; a plurality of load cam rollers interposed between the first and second reaction surfaces; a load cam roller retainer adapted to retain the plurality of load cam rollers, wherein the load cam roller retainer comprises a retainer tab extension; and a spring, adapted to be at least partially housed in the annular groove, the retainer tab extension configured to engage a first end of the spring, the traction ring adapted to engage a second end of the spring, wherein the plurality of load cam rollers are configured to roll up the set of ramps and come to rest on the plurality of flat surfaces of the traction ring. - View Dependent Claims (2, 3, 4, 5)
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6. A clamping force generator (CFG) for a transmission, the CFG 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 a plurality of flat portions and wherein the second side comprises a traction surface, wherein each of a plurality of load cam rollers is configured to roll along a path including at least one of the set of ramps and at least one of the plurality of flat portions; a spring having a first end and a second end; wherein the traction ring is adapted to couple to one end of the spring; and a load cam roller retainer for retaining the plurality of load cam rollers, the load cam roller retainer having at least one tab adapted to engage the second end of the spring. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A clamping force generation mechanism for a transmission, the mechanism comprising:
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an annular ring having a first reaction surface having a first set of ramps; a traction ring having a second reaction surface, wherein the traction ring comprises an annular groove, the second reaction surface comprising a second set of ramps and a plurality of flat surfaces; a plurality of load cam rollers interposed between the first and second reaction surfaces, wherein each of the plurality of load cam rollers is configured to roll up the second set of ramps and come to rest on the plurality of flat surfaces of the traction ring; a load cam roller retainer adapted to retain the load cam rollers, wherein the load cam roller retainer comprises a retainer tab extension; and a spring, adapted to be at least partially housed in the annular groove, the retainer tab extension configured to engage a first end of the spring, the traction ring adapted to engage a second end of the spring. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification