Metal V-belt type continuously variable transmission

Details Metal V-belt type continuously variable transmission Metal V-belt type continuously variable transmission

1997-03-14

1998-09-01

Hannon, Thomas R.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

474 17, F16H 5556

Patent

active

058002987

ABSTRACT:
In a metal V-belt type continuously variable transmission having a driving pulley and a driven pulley, the inclination angle .alpha. of a V-groove in the pulleys is set in a range represented by tan.sup.-1 .mu.a<.alpha.<tan.sup.-1 .mu.s, wherein .mu.s represents the static friction coefficient between the pulley and an endless belt, and .mu.a represents the dynamic friction coefficient between the pulley and the endless belt. In a conventional metal V-belt type continuously variable transmission, the inclination angle .alpha. is set in a range represented by .alpha.>tan.sup.-1 .mu.s. If the transmittable torque Tin is increased, the tensile force of the endless belt is increased to produce slipping between the endless belt and the pulley. However, according to the present invention, by decreasing the inclination angle .alpha. to reduce the tensile force of the endless belt, the transmittable torque Tin can be increased while preventing slipping of the endless belt.

REFERENCES:
patent: 4380444 (1983-04-01), Dolza
patent: 4673379 (1987-06-01), Ohzono et al.
patent: 4810237 (1989-03-01), Mantovaara
patent: 4941863 (1990-07-01), Sampei et al.
patent: 5328412 (1994-07-01), Durum
Patent Abstracts of Japan, unexamined applications, M Field, vol. 12, No. 31, Jan. 29, 1988, The Patent Office Japanese Government, p. 28 M 663; & JP-A-62 184 270.

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