Drive device for a motor vehicle
AssigneeSchaeffler Technologies AG & Co. KG
InventorsThorsten Biermann, Christian Lutz, Daniel Burghardt
Life of this patent
Estimating the term…
Abstract
A drive device includes a drive machine, such as an electric motor, gear reduction planetary gear sets, and a differential. One of the gear reduction planetary gear sets utilizes multi-step planetary gears. The differential is a spur gear differential. To reduce axial length, one of the gearwheels of each multi-step planetary gears axially overlaps with planetary gears of the spur gear differential.
Claims13
A drive device for a motor vehicle, comprising a drive machine which is operatively connected via a drive shaft to a transmission device, the transmission device having a first planetary set with a plurality of planetary gears, a multi-step planetary set with a plurality of multi-step planetary gears, and a differential transmission with a second and third planetary set, each of the first, second, and third planetary sets having a plurality of planetary gears, the planetary gears of the first planetary set being arranged rotatably on a first planetary carrier and being in tooth engagement radially between a first sun and a first internal gear, each multi-step planetary gear having a first and a second gearwheel which are connected fixedly to one another so as to rotate together, the multi-step planetary gears being arranged rotatably on a second planetary carrier, the first gearwheel being in tooth engagement with a second sun, and the second gearwheel being in tooth engagement with a second internal gear, and the first planetary carrier being connected fixedly to the second sun so as to rotate with it, and the first internal gear being fixed on a housing in a stationary manner, the respective planetary gears of the second and third planetary set, furthermore, being mounted rotatably on the second planetary carrier, the planetary gears of the second planetary set being in tooth engagement with a third sun, and the planetary gears of the third planetary set being in tooth engagement with a fourth sun, and the planetary gears of the second planetary set being in tooth engagement in pairs with the planetary gears of the third planetary set.
A drive device comprising:
- a first planetary gearset having a first sun gear fixed to a driveshaft, a first carrier, a first ring gear held against rotation, and a plurality of first planet gears supported for rotation with respect to the first carrier and meshing with the first sun gear and with the first ring gear;
- a second planetary gearset having a second sun gear fixed to the first carrier, a second carrier, a second ring gear held against rotation, and a plurality of multi-step planet gears, each multi-step planet gears having a first gearwheel fixed to a second gearwheel, each first gearwheel meshing with the second sun gear, each second gearwheel meshing with the second ring gear;
- and
- a differential.
Dependencies are inferred from the claim text.