US 2019/0154140 A1Published application

Drive system for driving a component having an electric motor unit and a transmission unit

AssigneeRolls-Royce Deutschland Ltd & Co KG

InventorsChristian Loesch, Frank Anton, Robert Goraj

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Abstract

The invention relates to an electric motor equipped with a transmission unit, for example in the form of a planetary gear transmission. The planetary gear transmission has a sun gear, a plurality of planetary gears, and a ring gear, which are coupled to one another via corresponding toothings The sun gear is coupled directly to a shaft of the electric motor and is fastened thereto. The planetary gears or the axles thereof are retained on a bearing plate of the electric motor, such that the transmission unit does not have to provide any additional components for this purpose. In one embodiment of the planetary gear transmission, the ring gear is rotatably mounted on the housing of the electric motor. In an alternative embodiment, the ring gear is fastened to the housing of the electric motor. A common feature of the two embodiments is that the parts of the transmission are retained on the housing of the electric motor, which housing is available in any case, in particular on the bearing plate thereof, and not on a separate housing or another component of the transmission unit.

Claims13

Dependent claims

A drive system for driving a component, the drive system comprising:

an electric motor unit configured to provide a rotational movement with a first rotational speed;
and
a transmission unit configured to transfer the provided rotational movement to the component with a second rotational speed,
wherein the electric motor unit comprises a housing with at least one bearing plate that is arranged on a first axial end of the housing of the electric motor unit and on which a shaft of the electric motor unit is mounted, the shaft being configured to perform and provide the provided rotational movement,
wherein the transmission unit comprises:
a first gearwheel that is connected rotationally conjointly and directly to the shaft of the electric motor unit;
at least one second gearwheel that is coupled to the first gearwheel such that the second gearwheel co-rotates during rotation of the first gearwheel,
wherein the second gearwheel, for the transfer of the provided rotational movement, is coupleable to the component to be driven, and
wherein each of the second gearwheels is held on the housing of the electric motor unit such that a position of the respective second gearwheel does not change.

6 more elements

Dependencies are inferred from the claim text.