Electric drive with cooling

An electric drive for driving a motor vehicle, comprising:

• a housing assembly;
• an electric machine with a motor shaft in the form of a hollow shaft which is rotatably drivable about an axis of rotation by the electric machine;
• a planetary gearing with a sun gear, a ring gear, a plurality of planet gears and a planet carrier, wherein the sun gear is rotatably drivable about the axis of rotation by the hollow shaft, and the ring gear is arranged in the housing assembly in a rotationally fixed manner;
• and
• a power distribution unit with an input part and two output parts;
• wherein the input part is connected to the planet carrier and rotates together therewith about the axis of rotation;
• wherein one of the two output parts is connected to an intermediate shaft extending through the hollow shaft of the electric machine;
• wherein the housing assembly comprises a first housing part motor sided, a second housing part gearing sided, and an intermediate housing part arranged between the first housing part and the second housing part, wherein the intermediate housing part comprises an intermediate wall which spatially separates a motor chamber and a gearing chamber, wherein a lubricant is contained in the gearing chamber;
• wherein the intermediate housing part, integrally formed with the intermediate wall, comprises a motor-side jacket portion which extends from the intermediate wall axially into the outer jacket portion of the first housing part, and a gearing-side jacket portion which extends from the intermediate wall axially in a direction of the second housing part and is at least indirectly connected therewith;
• wherein a sealed cavity for a through-flowing coolant is formed between an outer face of the motor-side jacket portion and an inner face of the first housing part;
• and
• wherein the intermediate housing part has, in an upper half of the housing assembly, an oil-collecting chamber which is at least partially in axial overlap with the planet gears, and wherein coolant splashing around from the planet gears during rotation of the planet carrier is temporarily stored in the oil-collecting chamber.

An electric drive for driving a motor vehicle, comprising:

• a housing assembly;
• an electric machine with a motor shaft in the form of a hollow shaft which is rotatably drivable about an axis of rotation by the electric machine;
• a planetary gearing with a sun gear, a ring gear, a plurality of planet gears and a planet carrier, wherein the sun gear is rotatably drivable about the axis of rotation by the hollow shaft, and the ring gear is arranged in the housing assembly in a rotationally fixed manner;
• and
• a power distribution unit with an input part and two output parts;
• wherein the input part is connected to the planet carrier and rotates together therewith about the axis of rotation;
• wherein one of the two output parts is connected to an intermediate shaft extending through the hollow shaft of the electric machine;
• wherein the housing assembly comprises a first housing part motor sided, a second housing part gearing sided, and an intermediate housing part arranged between the first housing part and the second housing part, wherein the intermediate housing part comprises an intermediate wall which spatially separates a motor chamber and a gearing chamber, wherein a lubricant is contained in the gearing chamber;
• wherein the intermediate housing part, integrally formed with the intermediate wall, comprises a motor-side jacket portion which extends from the intermediate wall axially into the outer jacket portion of the first housing part, and a gearing-side jacket portion which extends from the intermediate wall axially in a direction of the second housing part and is at least indirectly connected therewith;
• wherein a sealed cavity for a through-flowing coolant is formed between an outer face of the motor-side jacket portion and an inner face of the first housing part;
• wherein the planet carrier and the input part of the power distribution unit are fixedly connected to each other and form a carrier element, wherein a first end of the carrier element is rotatably mounted at the intermediate housing part by a first carrier bearing, and a second end of the carrier element is rotatably mounted at the second housing part by a second carrier bearing;
• and
• wherein a gearing side fluid channel is provided, which fluidically connects the oil collecting chamber with the second carrier bearing.