US 6,585,619 B2 · Transmission arrangement

Abstract

In a transmission arrangement including a continuously variable toroidal drive mechanism, an intermediate planetary gear train and a final planetary gear train which are arranged in the power path between an input shaft and an output shaft, a central intermediate shaft is connected to the input shaft and to a central drive disc of the toroidal drive mechanism, and to a planet carrier of the intermediate gear train. A concentric intermediate shaft, through which the central intermediate shaft extends, is connected to a central driven disc of the toroidal drive mechanism and to a sun gear of the intermediate gear train. The concentric intermediate shaft has a drive connection to a first mechanism link of the final gear train in the form of a sun gear. An outer ring gear of the intermediate gear train has a drive connection to a second mechanism link of the final gear train. A third mechanism link of the final gear train is mounted on a housing part. A fourth mechanism link of the final gear train has a drive connection to the output shaft, this arrangement providing for high efficiency with a coaxial arrangement of the transmission components.

Claims21

Dependent claims

Transmission arrangement, including a continuously variable toroidal drive mechanism, an intermediate planetary gear train and a final planetary gear train arranged in a power path between an input shaft and an output shaft, comprising:

a central intermediate shaft
which is connected to the input shaft and to a central toroidal drive disc of the toroidal drive mechanism and to a planet carrier of the intermediate gear train,
a concentric intermediate shaft
through which the central intermediate shaft extends,
which is connected to a central driven disc of the toroidal drive mechanism and to a sun gear of the intermediate gear train,
which has a drive connection to a first mechanism link of the final gear train in the form of a second sun gear
a first outer ring of the intermediate gear train
which has a drive connection to a second mechanism link of the final gear train in the form of a second ring gear
a third mechanism link of the final gear train in the form of a planet carrier
which is fixed so that it cannot rotate in relation to a non-rotating housing part, and
a fourth mechanism link of the final gear train in the form of a third ring gear
which has a drive connection to the output shaft.

9 more elements

Transmission arrangement, in which a continuously variable toroidal drive mechanism an intermediate planetary gear train and a final planetary gear train are arranged in a power path between an input shaft and an output shaft, comprising:

a central intermediate shaft
which is connected to the input shaft and to a central toroidal drive disk of the toroidal drive mechanism and to a planet carrier of the intermediate gear train
a concentric intermediate shaft
through which the central intermediate shaft extends
which is connected to a central driven disk of the toroidal drive mechanism
a first sun gear of the intermediate gear train
which is connected to the concentric intermediate shaft
a second sun gear of the intermediate gear train
which has a drive connection to a first mechanism link of the final planetary gear train
a second mechanism link in the form of a web rotatably receiving said output shaft and supporting the planetary gears of said final gear train
which, with the web stationary, reverses the direction of rotation between the first mechanism link and a third mechanism link of the final gear train
a first outer ring gear of the intermediate gear train
which has a drive connection to the third mechanism link of the final gear train
a drive connection between the output shaft and one of the mechanism links of the final gear train that can be made to rotate in the opposite direction
a planet wheel of the intermediate gear train
which has a toothed rim with a predetermined number of teeth
which meshes with the second sun gear of the intermediate gear train which has fewer than said predetermined number of teeth and a drive connection to the first mechanism link of the final gear train, and
which also has a toothed rim with a smaller number of teeth than said planet wheel of the intermediate gear train and
which meshes with the sun gear of the intermediate gear train having a larger number of teeth than said toothed rim of the planet wheel of said intermediate gear train which sun gear is connected to the concentric intermediate shaft.

16 more elements

Dependencies are inferred from the claim text.

Transmission arrangement

Life of this patent

Transmission arrangement

Life of this patent

Abstract

Claims21