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US 9,863,525 B2Granted
Transfer gear
AssigneeMAGNA Powertrain AG & Co KG
InventorsStefan Leitgeb, Johann Willberger
Life of this patent
Estimating the term…
Abstract
A clutch-controlled transfer gear having a drive shaft which is mounted so as to be rotatable by way of at least one drive shaft bearing, a primary shaft which is mounted so as to be rotatable by way of at least one primary shaft bearing, a secondary shaft which is arranged with an axial offset with respect to the drive shaft and which is mounted so as to be rotatable by way of at least one secondary shaft bearing, a transfer mechanism which is arranged between secondary shaft and drive shaft and bridges the axial offset thereof, and a clutch which is arranged between the drive shaft and an offset gear, by means of which clutch the secondary shaft is, for the operation thereof, coupled to the drive shaft and, for the deactivation thereof, decoupled from the drive shaft, as required.
Claims21
A transfer gear having a housing which surrounds a housing interior and a plurality of assemblies each having at least one part, the transfer gear comprising:
- a first assembly including a drive shaft which is mounted so as to be rotatable in the housing and/or relative to the at least one part of at least one other of the plurality of assemblies by way of at least one drive shaft bearing;
- a second assembly including a primary shaft which is permanently coupled to the drive shaft and which is mounted so as to be rotatable in the housing and/or relative to the at least one part of at least one other of the plurality of assemblies by way of at least one primary shaft bearing;
- a third assembly including a secondary shaft which is arranged with an axial offset with respect to the drive shaft and which is mounted so as to be rotatable in the housing and/or relative to the at least one part of at least one other of the plurality of assemblies by way of at least one secondary shaft bearing;
- a fourth assembly including an offset gear which is arranged between the secondary shaft and the drive shaft and bridges the axial offset thereof and which has one or more offset gear elements which, by means of offset gear bearings, are mounted so as to be rotatable in the housing and/or relative to the at least one part of at least one other of the plurality of assemblies;
- and
- a fifth assembly including a clutch, wherein the clutch is arranged between the drive shaft and the offset gear and by means of said clutch the secondary shaft can be coupled to the drive shaft via the offset gear as required, the clutch having one or more clutch elements which are mounted so as to be rotatable in the housing and/or relative to the at least one part of the fifth assembly and/or at least one other of the plurality of assemblies by way of one or more clutch bearings,
- wherein the housing has an oil sump which occupies a low point of the housing interior and which has an oil level lying above the low point, wherein the offset gear extends at least partially to a level below the oil level and, during operation of the secondary shaft, conveys oil out of the oil sump to bearings situated above the oil level, wherein the bearings of the transfer gear are subdivided into bearings which participate exclusively in a “connect” operating mode of the transfer gear and bearings which continue to participate in a “disconnect” operating mode of the transfer gear,
- wherein the transfer gear has one or more oil chambers which are situated above the oil level and which are supplied with oil by way of the offset gear in the “connect” operating mode of the transfer gear and which communicate at least with those bearings which are arranged above the oil level and which continue to participate in the “disconnect” operating mode of the transfer gear, wherein an oil chamber has a respective maximum fill level, and multiple oil chambers have the same maximum fill level communicate with one another or are separated from one another.
5 more elements
A transfer gear comprising:
- a housing defining a housing interior;
- a first shaft rotatably mounted in the housing by way of a first shaft bearing;
- a second shaft arranged axially offset relative to the first shaft and which is rotatably mounted in the housing by way of a second shaft bearing for rotation relative to the first shaft;
- an offset gear having a first offset gear element rotatably mounted to the first shaft by way of an offset gear bearing for rotation relative to the first shaft, a second offset gear element fixed for rotation with the second shaft, and a third offset gear element drivingly connecting the first offset gear element for rotation with the second offset gear element;
- and
- a clutch arranged between the first shaft and the first offset gear element and operable to selectively couple the second shaft to the first shaft via the offset gear, the clutch having a clutch element rotatably mounted via a clutch bearing;
- wherein the housing includes an oil sump of oil located at a low point of the housing interior and which has an oil level lying above the low point, wherein the second offset gear element extends at least partially into the oil sump to a level below the oil level such that during rotation of the second shaft oil is conveyed from the oil sump to the first shaft bearing, the offset gear bearing and the clutch bearing, all being situated above the oil level, wherein the second shaft bearing participates exclusively in a “connect” operating mode of the transfer gear and the remaining bearings each continue to participate in a “disconnect” operating mode of the transfer gear,
- wherein the transfer gear has first, second and third oil chambers situated above the oil level and which are supplied with oil by way of the offset gear being rotated with the second shaft in the “connect” operating mode of the transfer gear, wherein the first oil chamber communicates with the first shaft bearing, the second oil chamber communicates with the offset gear bearing and the third oil chamber communicates with the clutch bearing and which continue to participate in the “disconnect” operating mode of the transfer gear, wherein each of the first, second and third oil chambers have a respective maximum oil fill level that is maintained during the “disconnect” operating mode of the transfer gear.
5 more elements
Dependencies are inferred from the claim text.