Toroidal continuously variable transmission

Details Toroidal continuously variable transmission Toroidal continuously variable transmission

2005-07-26

2005-07-26

Joyce, William C. (Department: 3682)

Friction gear transmission systems or components

Friction gear includes idler engaging facing concave surfaces

Toroidal

C476S040000

Reexamination Certificate

active

06921350

ABSTRACT:
A toroidal continuously variable transmission includes an input disk, an output disk facing the input disk, a power roller gripped between the input disk and output disk, a pedestal which supports the power roller free to rotate about a power roller rotation axis, and a trunnion which gyrates about a trunnion gyration axis. The trunnion includes a first plane portion perpendicular to the power roller rotation axis, two second plane portions perpendicular to the first plane portion and facing each other across the power roller rotation axis and two inclined portions between the first plane portion and the second plane portions, respectively. A roller bearing unit, including a cage housing a roller, supports the pedestal on the trunnion so that the pedestal is free to slide in a direction that is perpendicular to both the trunnion gyration axis and power roller rotation axis. Limiting members, that limit the slide amount of the cage of the power roller bearing relative to the trunnion, are provided on the inclined portions. In this way, the projections serve as a rib, which raises the rigidity of the trunnion. Therefore, deformation of the trunnion is reduced even if overload acts on the trunnion via power roller.

REFERENCES:
patent: 5951435 (1999-09-01), Imanishi et al.
patent: 6174258 (2001-01-01), Imanishi et al.
patent: 2002/0137592 (2002-09-01), Mori
patent: 2001-165265 (2001-06-01), None

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