Circulation sump device for an electric drive unit of a vehicle
A circulation sump device for an electric drive unit of a motor vehicle, which can be lubricated and/or temperature-controlled via a lubricant, comprising a lubricant sump with a first axial region and a second axial region, a lubricant reservoir which extends below the lubricant sump in the first axial region and is connected to the lubricant sump via a lubricant drain opening, and a lubricant sump pump line which is designed to pump lubricant out of the second axial region of the lubricant sump into the lubricant reservoir.
1 . A circulation sump device for an electric drive unit of a motor vehicle, which can be lubricated and/or temperature-controlled via a lubricant, comprising:
a lubricant sump having a first axial region and a second axial region,
a lubricant reservoir which extends below the lubricant sump in the first axial region and is connected to the lubricant sump via a lubricant outflow opening, and
a lubricant sump-to-pump line which is specified to pump lubricant from the second axial region of the lubricant sump into the lubricant reservoir.
2 . The circulation sump device according to claim 1 , wherein:
the first axial region contains a position of stator end windings on a first side of a stator core of the drive unit, and the second axial region contains a position of stator end windings on a second side.
3 . The circulation sump device according to claim 1 , wherein:
a reservoir pump is disposed in the lubricant sump-to-pump line.
4 . The circulation sump device according to claim 1 , wherein:
the lubricant sump-to-pump line is disposed in the second axial region so as to proceed from a stator core-distal axial end of a machine housing and/or of the lubricant sump.
5 . The circulation sump device according to claim 1 , wherein:
the lubricant outflow opening in the first axial region is disposed on a stator core-distal axial end of a machine housing and/or of the lubricant reservoir and/or of the lubricant sump.
6 . The circulation sump device according to claim 1 , wherein:
a conveying outlet from the lubricant reservoir is disposed at or close to an axial position of the lubricant outflow opening.
7 . The circulation sump device according to claim 1 , wherein:
the lubricant reservoir also extends in the second axial portion.
8 . The circulation sump device according to claim 1 , wherein:
a baffle is disposed in the lubricant reservoir, wherein a pressurized oil inlet of the lubricant sump-to-pump line and the conveying outlet from the lubricant reservoir are disposed on the same side of the baffle.
9 . The circulation sump device according to claim 8 , wherein:
the baffle is specified to impede a flow of lubricant proceeding from the first axial region to the second axial region.
10 . The circulation sump device according to claim 1 , wherein:
provided between the lubricant reservoir and the second axial region of the lubricant sump is a connecting line for balancing a lubricant filling level and/or venting the lubricant reservoir.
11 . The circulation sump device according to claim 1 , wherein:
a conveying pump, which is disposed in a conveying line that proceeds from the conveying outlet, and the reservoir pump are designed with a common pump drive.
12 . An electric drive unit for a motor vehicle, comprising:
an electric drive machine in a machine housing,
an output transmission in a transmission housing, and
a circulation sump device according to claim 1 .
13 . The electric drive unit according to claim 12 ,
wherein:
the lubricant sump of the circulation sump device is formed in the machine housing on both sides of a stator core of the drive machine.
14 . The electric drive unit according to claim 12 ,
wherein:
a transmission lubricant sump of the transmission housing can empty by way of an overflow into the lubricant sump of the circulation sump device in the machine housing.
15 . The electric drive unit according to claim 12 ,
wherein:
the lubricant reservoir is disposed below the machine housing and extends between the conveying outlet and the beginning of the lubricant sump-to-pump line in a transverse direction of the drive unit.
16 . The circulation sump device according to claim 8 , wherein:
the baffle is curved about the pressurized oil inlet.
17 . The circulation sump device according to claim 11 , wherein:
the conveying pump and the reservoir pump are designed as a two-stage lubricant pump.
18 . The circulation sump device according to claim 1 , wherein:
the lubricant sump-to-pump line proceeds from the second axial region into where the lubricant reservoir is disposed in the first axial region.
19 . The circulation sump device according to claim 10 , wherein:
the connecting line is disposed remote from the lubricant sump-to-pump line.
20 . The electric drive unit according to claim 12 , wherein:
a drive axle of the electric drive machine runs in a vehicle transverse direction such that the first axial region and the second axial region of the lubricant sump are distinguished by their vehicle transverse position.