Infinitely variable traction roller transmission speed control a

Details Infinitely variable traction roller transmission speed control a Infinitely variable traction roller transmission speed control a

1983-03-18

1985-07-02

Staab, Lawrence

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

74867, 74868, F16H 1508, B60K 4104, B60K 4106, B60K 4108

Patent

active

045260516

ABSTRACT:
In a speed control arrangement for an infinitely variable traction roller transmission in which motion transmitting traction rollers supported by pivot trunnions are disposed between, and in engagement with, toric discs for the transmission of motion therebetween, the trunnions have hydraulic piston and cylinder structures at opposite axial ends whose operating pressures are controlled by the control arrangement for proper torque and speed change characteristics. A torque control valve adapted to control fluid flow from a pressurized fluid source to the cylinders at opposite ends of said trunnions provides for a fluid pressure differential thereby generating an axial trunnion force corresponding to a desired torque through the transmission. Any force imbalance axially moving the trunnions is adapted to change the transmission ratio so as to obtain the desired torque level.

REFERENCES:
patent: 3184990 (1965-05-01), Perry
patent: 4091690 (1978-05-01), Miyao
patent: 4270415 (1981-06-01), Dickinson et al.
patent: 4275610 (1981-06-01), Kraus
patent: 4297918 (1981-11-01), Perry
patent: 4434675 (1984-03-01), Kraus
patent: 4444068 (1984-04-01), Kraus

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