Oil-evacuated electrical machine having rolling bearings, for a motor vehicle
An electrical machine ( 10 ) for an electrically operable axle of a motor vehicle, having a shaft ( 12 ) with an axis of rotation (D), at least one bearing ( 14 ), wherein the shaft is rotatably mounted via the at least one bearing, at least one end shield ( 16 ), and at least one bearing ring ( 18 ), which is arranged coaxially with the axis of rotation (D). The at least one bearing is connected to the end shield via the bearing ring, and the bearing ring has at least one longitudinal recess ( 20 a, 20 b ) on the outside for fluid evacuation. An electrically operated axle for a motor vehicle having the electrical machine is also provided.
1 . An electrical machine for an electrically operable axle of a motor vehicle, the electrical machine comprising:
a shaft having an axis of rotation;
at least one bearing, the shaft being rotatably mounted via the at least one bearing;
at least one end shield including a centering surface and at least one radially extending aperture extending through an axially extending surface of the centering surface; and
at least one bearing ring arranged coaxially to the axis of rotation, the at least one bearing being connected to the end shield via the bearing ring, and the bearing ring having at least one longitudinal recess configured for fluid evacuation, the at least one longitudinal recess is arranged on an outer circumference of the bearing ring and extends parallel to the axis of rotation uninterruptedly from a first axial end face to a second axial end face of the bearing ring, wherein the bearing ring directly contacts an outer ring of the bearing or the bearing ring is the outer ring of the bearing.
2 . The electrical machine according to claim 1 , wherein the at least one longitudinal recess is arranged on at least one of the first and second axial end faces of the bearing ring and extends perpendicular to the axis of rotation.
3 . The electrical machine according to claim 2 , wherein the at least one longitudinal recess extending parallel to the axis of rotation and the longitudinal recess that extends perpendicular to the axis of rotation are arranged in alignment with one another.
4 . The electrical machine according to claim 1 , wherein the bearing ring is positioned via the centering surface of the end shield.
5 . The electrical machine according to claim 1 , wherein the end shield has at least one circumferentially extending collecting recess configured for receiving fluid.
6 . The electrical machine according to claim 1 , wherein the at least one radially extending aperture has a vertical main axis of extension.
7 . The electrical machine according to claim 1 , wherein the bearing ring is positioned via the centering surface on the end shield, the end shield has at least one circumferentially extending collecting recess configured for receiving fluid, the at least one radially extending aperture has a vertical main axis of extension, and the at least one longitudinal recess, the at least one collecting recess, and the at least one radially extending aperture form a fluid channel configured to conduct fluid out of the electrical machine.
8 . An electrically operated axle for a motor vehicle comprising the electrical machine according to claim 1 .
9 . The electrical machine according to claim 1 , wherein the at least one longitudinal recess includes a plurality of longitudinal recesses which are evenly distributed over the outer circumference of the bearing ring.
10 . An electrical machine for an electrically operable axle of a motor vehicle, the electrical machine comprising:
a shaft having an axis of rotation;
at least one bearing, the shaft being rotatably mounted via the at least one bearing;
at least one end shield; and
at least one bearing ring including a generally hollow cylindrical shape, the at least one bearing ring is arranged coaxially to the axis of rotation and connected to the end shield via the bearing ring, and the bearing ring is positioned via a centering surface of the end shield, the bearing ring including:
at least one longitudinal recess extending in a radial direction perpendicular to the axis of rotation on an axial end face of the bearing ring; and
at least one longitudinal recess extending in an axial direction parallel to the axis of rotation on an outer radial face of the bearing ring, wherein the at least one longitudinal recess extending in the radial direction is directly fluidly connected to the at least one longitudinal recess extending parallel to the axis of rotation, and the recesses are configured for fluid evacuation;
wherein the end shield has at least one circumferentially extending collecting recess extending into the centering surface and configured for receiving fluid, and the end shield has at least one radially extending radial recess extending through an axially extending surface of the centering surface, and the at least one radial recess extends in the radial direction.
11 . The electrical machine of claim 10 , wherein the bearing ring is a separate component or an outer ring of the bearing.
12 . The electrical machine of claim 10 , wherein the at least one longitudinal recess, the at least one collecting recess and the at least one radial recess form a fluid channel configured to conduct fluid out of the electrical machine.
13 . The electrical machine according to claim 12 , wherein the at least one longitudinal recess includes a plurality of longitudinal recesses which are evenly distributed over a circumference of the bearing ring.
14 . The electrical machine of claim 10 , wherein the at least one longitudinal recess extending in the axial direction parallel to the axis of rotation on an outer radial face of the bearing ring extends parallel to the axis of rotation uninterruptedly from a first axial end face to a second axial end face of the bearing ring.
15 . The electrical machine of claim 10 , wherein the at least one radial recess comprises at least one radially extending aperture.