Continuously variable transmission of half-toroidal type

Details Continuously variable transmission of half-toroidal type Continuously variable transmission of half-toroidal type

1998-11-12

2000-03-14

Herrmann, Allan D.

Friction gear transmission systems or components

Friction gear includes idler engaging facing concave surfaces

Toroidal

F16H 1538

Patent

active

060366184

ABSTRACT:
A continuously variable transmission of the half-toroidal type, comprising an input shaft connected to a drive source, an input disc supported on the input shaft, an output disc supported on the input shaft and opposed to the input disc, and a power roller provided between the input and output discs for rocking motion and in rolling contact with the discs. In this transmission, the discs are shaped so that (R.multidot.d)/(D.multidot.t) is given by 0.5<(R.multidot.d)/(D.multidot.t)<1.5, where R is the radius of curvature of each traction surface, D is the distance between the centers of curvature, d is the inside diameter of each disc, and t is the thickness of each disc.

REFERENCES:
patent: 5218877 (1993-06-01), Fukushima et al.
patent: 5372355 (1994-12-01), Hibi
patent: 5556348 (1996-09-01), Kokubu et al.
patent: 5575736 (1996-11-01), Takemura
patent: 5735769 (1998-04-01), Takemura et al.
patent: 5823911 (1998-10-01), Hibi
patent: 5855531 (1999-01-01), Mitamura et al.

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