ELECTRIC DRIVE FOR A VEHICLE AND METHOD FOR MANUFACTURING AN ELECTRIC DRIVE FOR A VEHICLE
An electric drive for a vehicle includes a stator including a stator winding and a stator core having a longitudinal axis and opposing axial first and second face sides, the stator winding forming a first winding head at the first face side and a second winding head at the second face side. A housing has an interior that forms a stator accommodation space and a radial stop, which delimits the stator accommodation space axially. A spacer is attached to the first face side at a radial position more outward than the first winding head and abutting against the stop.
1 . Electric drive for a vehicle, the electric drive comprising:
a stator comprising a stator winding and a stator core having a longitudinal axis and opposing axial first and second face sides, the stator winding forming a first winding head at the first face side and a second winding head at the second face side; and
a housing with an interior that forms a stator accommodation space and a radial stop, which delimits the stator accommodation space axially;
wherein
a spacer being attached to the first face side at a radial position more outward than the first winding head and abutting against the stop.
2 . Electric drive according to claim 1 , wherein
the spacer is formed annularly about the longitudinal axis.
3 . Electric drive according to claim 1 , wherein
the housing forms a coolant inlet for supplying a coolant into the interior of the housing for cooling the stator.
4 . Electric drive according to claim 3 , further comprising
a first oil jet ring being attached to the first face side of the stator core at a radial position between the first winding head and the spacer so that the spacer and the first oil jet ring delimit radially a first fluid chamber being connected to the inlet in a fluid conductive manner, the first oil jet ring being configured to jet a coolant from the first fluid chamber towards the first winding head.
5 . Electric drive according to claim 3 , wherein
the housing and the stator core delimit radially a cooling jacket being connected to the inlet in a fluid conductive manner and configured to guide the coolant along an outer periphery of the stator core.
6 . Electric drive according to claim 4 , wherein
the spacer comprises an opening that connects the first fluid chamber and the cooling jacket in a fluid conductive manner.
7 . Electric drive according to claim 4 , wherein
the spacer comprises two annular protrusions being spaced apart axially and delimiting the first fluid chamber axially.
8 . Electric drive according to claim 7 , wherein
the interior of the housing forms two annular protrusions corresponding to the protrusions of the first oil jet ring and being arranged at an axial position beyond the stop as seen from the stator.
9 . Electric drive according to claim 3 , further comprising
a second oil jet ring being attached to the second face side of the stator core at a radial position radially more outward than the second winding head so that the housing and the second oil jet ring delimit radially a second fluid chamber being connected to the inlet in a fluid conductive manner, the second oil jet ring being configured to jet the coolant from the second fluid chamber towards the second winding head.
10 . Electric drive according to claim 9 , wherein
the cooling jacket and the second fluid chamber are connected in a fluid conductive manner.
11 . Electric drive according to claim 1 , further comprising
an inverter disposed in an inverter accommodation space formed by the housing on a side opposite to the stator accommodation space.
12 . Method for manufacturing an electric drive for a vehicle, the method comprising steps of:
providing a stator comprising a stator winding and a stator core having a longitudinal axis and opposing axial first and second face sides, the stator winding forming a first winding head at the first face side and a second winding head at the second face side;
providing a housing with an interior that forms a stator accommodation space and a radial stop, which delimits the stator accommodation space axially;
evaluating, whether an axial length of the stator core lies within at least one of at least two predefined ranges;
attaching a spacer to the first face side at a radial position more outward than the first winding head, if the axial length lies within the at least one of the at least two ranges; and
arranging the stator into the stator accommodation space such that the spacer abuts against the stop, if the axial length lies within the at least one of the at least two ranges, and such that the first face side abuts against the stop, otherwise.
13 . Method according to claim 12 , further comprising steps of:
evaluating, in which one of multiple predefined subranges of a respective one of the ranges the length of the stator core lies;
attaching a second oil jet ring to the second face side of the stator core at a radial position more outward than the second winding head, wherein, if the axial length lies within a first one of the subranges, a first type second oil ring with a first oil ring length, is used and, if the axial length lies in a second one of the subranges, a second type second oil ring with a second oil ring length being smaller than the first oil ring length is used.
14 . Method according to claim 13 , wherein
in the step of attaching the second oil jet ring, a third type second oil jet ring with a third oil ring length being smaller than the second oil ring length is used, if the axial length lies within a third one of the subranges.
15 . Electric drive according to claim 2 , wherein
the housing forms a coolant inlet for supplying a coolant into the interior of the housing for cooling the stator.
16 . Electric drive according to claim 4 , wherein
the housing and the stator core delimit radially a cooling jacket being connected to the inlet in a fluid conductive manner and configured to guide the coolant along an outer periphery of the stator core.
17 . Electric drive according to claim 5 , wherein
the spacer comprises an opening that connects the first fluid chamber and the cooling jacket in a fluid conductive manner.
18 . Electric drive according to claim 5 , wherein
the spacer comprises two annular protrusions being spaced apart axially and delimiting the first fluid chamber axially.
19 . Electric drive according to claim 4 , further comprising
a second oil jet ring being attached to the second face side of the stator core at a radial position radially more outward than the second winding head so that the housing and the second oil jet ring delimit radially a second fluid chamber being connected to the inlet in a fluid conductive manner, the second oil jet ring being configured to jet the coolant from the second fluid chamber towards the second winding head.
20 . Electric drive according to claim 2 , further comprising
an inverter disposed in an inverter accommodation space formed by the housing on a side opposite to the stator accommodation space.