Granted Patent B2

US 12,614,945 · App. 18/567,820 · Granted Apr 28, 2026

Inventors: Markus Lang (Munich, DE); Jerome Ragot (Munich, DE); Robert Schmidt (Munich, DE)

Assignee: Bayerische Motoren Werke Aktiengesellschaft

H02K3/487H02K1/24

Abstract

Claims (24)

1 . A multi-part sliding cover for a salient-pole rotor of an electric machine, wherein the sliding cover is configured to close a slot formed between two rotor poles of the salient-pole rotor which are adjacent in a circumferential direction and two axially opposite supporting rings of the salient-pole rotor, the sliding cover comprising:

a slot closing wedge, which is mechanically connectable to the two adjacent rotor poles, and

a support which is guided in the slot closing wedge and has a sealing surface of the sliding cover for pressing against at least one of the supporting rings and which is displaceable axially along the slot closing wedge in order to change an axial position of the sealing surface, wherein:

the support and the slot closing wedge have mutually corresponding guide elements, which form a sliding guide for axially displacing the support with respect to the slot closing wedge,

the support has a sealing body and a pin forming a first of the guide elements,

the slot closing wedge has a guide channel and a guide slot forming a second of the guide elements, and

in order to form the sliding guide, the sealing body is arranged in the guide channel and the pin is arranged in the guide slot.

2 . The sliding cover according to claim 1 , wherein the sliding cover has two supports which are clamped displaceably in the slot closing wedge and are configured to press against the axially opposite supporting rings.

3 . The sliding cover according to claim 1 , wherein:

the slot closing wedge has a transverse part extending along the circumferential direction and a longitudinal part extending in a radial direction, and

the support is clamped displaceably in the transverse part.

4 . The sliding cover according to claim 3 , wherein the transverse part has notches which form a form-fitting connection to pole shoes of the rotor poles when the sliding cover is pushed into the slot.

5 . The sliding cover according to claim 1 , wherein the sliding guide is a dovetail guide.

6 . The sliding cover according to claim 1 , wherein the sliding guide has an oversize fit for holding the support in an end position in which the support is pressed against the supporting ring.

7 . The sliding cover according to claim 6 , wherein in order to provide the oversize fit, a width of the sealing body and/or a width of the pin is greater than a width of the guide channel and/or a width of the guide slot.

8 . A salient-pole rotor for an electric machine of a motor vehicle, the rotor comprising:

rotor windings for forming a rotor magnetic field,

a rotor core with a rotor yoke and a number of rotor poles corresponding to a number of rotor windings for holding the rotor windings, wherein a respective slot is formed between two respective adjacent rotor poles, and wherein the rotor windings form winding heads on axially mutually opposite end faces of the rotor core,

supporting rings arranged on the end faces for encasing the winding heads, and

the sliding cover according claim 1 for closing the respective slot,

wherein the support which is displaceable axially along the slot closing wedge is positioned such that the support is pressed against at least one of the supporting rings for sealing purposes.

9 . An electric machine for a motor vehicle, the electrical machine comprising:

a stator, and

the rotor according to claim 8 , wherein the rotor is mounted rotatably with respect to the stator.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (19)