CVT transmission for motor vehicles, in particular for agricultural tractors
AssigneeCNH America LLC
InventorsGiancarlo Benassi, Giorgio Bordini
Life of this patent
Estimating the term…
Abstract
A CVT transmission for agricultural tractors which envisages equipment for continuous variation of the motion by means of an epicyclic gear train. In the CVT transmission the input of the motion from an engine occurs in a direction substantially that is parallel to an axis of longitudinal symmetry of the tractor, whilst the axes of a shafts, respectively, between which there takes place variation of the transmission ratio, are transverse with respect to the axis of longitudinal symmetry of the tractor.
Claims22
A CVT transmission for motor vehicles, in particular for agricultural tractors, said CVT transmission comprising equipment for continuous variation of the motion in terms of torque and of speed delivered, said continuous variation being obtained between two shafts;
- a CVT transmission in which said equipment for continuous variation of the motion comprises first mechanical means with fixed transmission ratio, and second mechanical means with variable transmission ratio, there being set between said first mechanical means and said second mechanical means an epicyclic gear train;
- said CVT transmission being characterised in that the input of the motion from an engine occurs in a direction substantially parallel to an axis of longitudinal symmetry of the motor vehicle, whilst the axes of said shaft, respectively, are set transverse to said axis of longitudinal symmetry of the motor vehicle.
The CVT transmission for motor vehicles, in particular for agricultural tractors, said CVT transmission comprising equipment for continuous variation of motion in terms of torque and of speed delivered, said continuous variation being obtained between two shafts;
- a CVT transmission, in which said equipment for continuous variation of motion comprises first mechanical means with fixed transmission ratio, and second mechanical means with variable transmission ratio, there being set between said first mechanical means and said second mechanical means an epicyclic gear train;
- said CVT transmission being characterised in that the input of the motion from an engine occurs in a direction that is substantially transverse with respect to an axis of longitudinal symmetry of the motor vehicle, as likewise the axes of said shaft, are transverse to said axis of longitudinal symmetry of the motor vehicle, and in that a guard is provided, which is designed to contain separately said second mechanical means with variable transmission ratio.
The CVT transmission for motor vehicles, in particular for agricultural tractors, said CVT transmission comprising equipment for continuous variation of the motion in terms of torque and of speeds delivered, said continuous variation being obtained between two shafts;
- a CVT transmission in which said equipment for continuous variation of the motion comprises first mechanical means with fixed transmission ratio, and second mechanical means (19) with variable transmission ratio, there being set between said first mechanical means and said second mechanical means an epicyclic gear train and in which the input of the motion from an engine occurs in a direction that is substantially parallel to an axis of longitudinal symmetry of the motor vehicle, whilst the axes, of said shaft and said shaft, respectively, are transverse with respect to said axis of longitudinal symmetry of the motor vehicle;
- said CVT transmission being characterised in that said second mechanical means and said epicyclic gear train are always the same for any power to be transmitted, whereas it is possible to change—according to the power—either a crown-wheel-and-pinion assembly for input of the power coming from said engine, or else said first mechanical means, with fixed transmission ratio.
Dependencies are inferred from the claim text.