Metal V-belt type continuously variable transmission

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

1998-08-04

1999-08-03

Bonck, Rodney H.

Endless belt power transmission systems or components

Friction drive pulley or guide roll

With particular belt

474 28, 475210, F16H 5556

Patent

active

059317566

ABSTRACT:
A metal V-belt type continuously variable transmission in which the length of a side of an element contacting with a V-face of a pulley is shortened to increase a ratio range. If the element side length of a metal element is represented by L, the angle of the V-face of the pulley is represented by .alpha., and the hertz surface pressure between the pulley and the metal element is represented by .sigma..sub.H, the following relation is established: L .varies. sin .alpha./.sigma..sub.H.sup.2. When the hertz surface pressure .sigma..sub.H is determined to be between an upper limit value defined by the wear durability of the metal element and a lower limit value defined by the limit tensile force of an endless belt, the element side length L can be decreased by decreasing the angle of the V-face of the pulley. Thus, the distance through which the metal element can be moved radially of the pulley is increased to increase the ratio range.

REFERENCES:
patent: 3127780 (1964-04-01), Buhrmann
patent: 3722308 (1973-03-01), Steuer
patent: 3783705 (1974-01-01), Moogk
patent: 4900295 (1990-02-01), Tani et al.
patent: 5800298 (1998-09-01), Kanehara et al.
Roper, H. "Anforderungen an die Druckokversorgungseinheit hydraulisch gesteuerter CVT-Getriebe" Antriebstechnik: vol. 26 No. 8 (1987) pp. 41-47.
European Search Report, The Hague, Dec. 29, 1998.

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