Toroidal type continuously variable transmission

Details Toroidal type continuously variable transmission Toroidal type continuously variable transmission

1998-10-30

2000-05-23

Bucci, David A.

Friction gear transmission systems or components

Friction gear includes idler engaging facing concave surfaces

Toroidal

384912, F16H 1538

Patent

active

060660686

ABSTRACT:
A power roller bearing and input and output disks are made of a material containing 0.15 to 0.5 wt %, 0.15 to 1.5 wt %, and 0.1 to 1.5 wt % of C, Si, and Mo, respectively, and 9 ppm or less of oxygen. At least one component selected from the group consisting of the inner and outer rings and the input and output disks is subjected to carbonitriding, hardening, tempering and grinding, such that a finished surface hardness has a Vickers hardness of Hv720 or more and the hardness at a depth of Dx from the surface is Hv650 or more. The Dx is a critical equivalent stress generation position in a synthetic stress distribution and meets Dx=3.0 Zo to 5.0 Zo where Zo is a maximum dynamic shearing stress generation position from the surface.

REFERENCES:
patent: 5456766 (1995-10-01), Beswick et al.
patent: 5556348 (1996-09-01), Kokubu et al.
patent: 5830285 (1998-11-01), Katayama et al.
Article from a tribology conference held in Morioka entitled "Rolling Life under Bending Stress," Japanese Society of Tribologists, Oct. 1992.

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