Electric motor having a switching unit and a contact adapter with a plug connection

Patent metadata

Field	Value
Publication number	US-12525845-B2
Application number	US-202318208093-A
Country	US
Kind code	B2
Filing date	Jun 9, 2023
Priority date	Dec 9, 2020
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

An electric motor of a motor vehicle, in particular an auxiliary unit, with a stator having a stator winding as well as with a rotor as well as with a switching unit and with a contact adapter for an electric motor connection. The stator and the rotor are arranged concentrically to a motor axis in a motor housing, which is closed with a bearing plate arranged perpendicular to the motor axis. The switching unit is placed on the stator and electrically contacted by the stator winding, and the contact adapter is connected to the switching unit and in electrical contact with it. A plug connection of the contact adapter is arranged in an opening of the bearing plate. A method for the mounting of an electric motor as well as an auxiliary unit of a motor vehicle are also provided.

First claim

What is claimed is:

1 . An electric motor of a motor vehicle, the electric motor comprising:
a stator having a stator winding; a rotor, the stator and the rotor being arranged concentrically to a motor axis in a motor housing, which is connected to a bearing plate that is disposed substantially perpendicular to the motor axis; a switching unit mounted on the stator and in electrical contact with the stator winding; a contact adapter for an electrical motor connection, the contact adapter being connectable to the switching unit and in electrical contact with the switching unit; and a plug connection of the contact adapter being arranged in an opening of the bearing plate, wherein the plug connection is floatingly mounted on the switching unit, and wherein the plug connection has a peg running parallel to the motor axis, which is inserted with play inside a hole of the switching unit.

2 . The electric motor according to claim 1 , wherein the switching unit has a recess within which the plug connection is arranged with play.

3 . The electric motor according to claim 1 , wherein a flexible and/or elastic contact arm is connected to the plug connection, which is attached to the switching unit.

4 . The electric motor according to claim 1 , wherein the contact adapter has a positioner to position the plug connection in the opening.

5 . The electric motor according to claim 4 , wherein the positioner comprises crush ribs molded on an outside of the plug connection and running parallel to the motor axis, such that when the plug connection is inserted into the opening parallel to the motor axis, the crush ribs successively come into mechanical contact with the edge of the opening.

6 . The electric motor according to claim 4 , wherein on a side facing away from the switching unit, the plug connection has a plug-in receptacle running substantially parallel to the motor axis for a temporary reception of a positioning tool.

7 . A method for mounting the electric motor according to claim 1 , the method comprising:
placing the switching unit on the stator to thereby be electrically contacted by the stator winding; connecting the contact adapter to the switching unit such that the contact adapter is in electrical contact with the switching unit; arranging the stator concentrically to the motor axis in the motor housing; and closing the motor housing with the bearing plate on which the rotor is held, wherein the rotor is arranged concentrically to the motor axis in the motor housing, wherein the plug connection is arranged in the opening of the bearing plate, wherein the plug connection is floatingly mounted on the switching unit, and wherein the plug connection has the peg running parallel to the motor axis, which is inserted with play inside the hole of the switching unit.

8 . An electric motor of a motor vehicle, the electric motor comprising:
a stator having a stator winding; a rotor, the stator and the rotor being arranged concentrically to a motor axis in a motor housing, which is connected to a bearing plate that is disposed substantially perpendicular to the motor axis; a switching unit mounted on the stator and in electrical contact with the stator winding; a contact adapter for an electrical motor connection, the contact adapter being connectable to the switching unit and in electrical contact with the switching unit; and a plug connection of the contact adapter being arranged in an opening of the bearing plate, wherein the plug connection is floatingly mounted on the switching unit, wherein a flexible and/or elastic contact arm is connected to the plug connection, which is attached to the switching unit, and wherein at an end facing away from the plug connection, the contact arm has a connection lug for contacting, which contacts a corresponding connection element of the switching unit via brazing.

9 . An auxiliary unit of a motor vehicle, comprising an electric motor, the electric motor comprising:
a stator having a stator winding; a rotor, the stator and the rotor being arranged concentrically to a motor axis in a motor housing, which is connected to a bearing plate that is disposed substantially perpendicular to the motor axis; a switching unit mounted on the stator and in electrical contact with the stator winding; a contact adapter for an electrical motor connection, the contact adapter being connectable to the switching unit and in electrical contact with the switching unit; and a plug connection of the contact adapter being arranged in an opening of the bearing plate, wherein the plug connection is floatingly mounted on the switching unit, and wherein the plug connection has a peg running parallel to the motor axis, which is inserted with play inside a hole of the switching unit.

10 . A method for mounting the electric motor according to claim 8 , the method comprising:
placing the switching unit on the stator to thereby be electrically contacted by the stator winding; connecting the contact adapter to the switching unit such that the contact adapter is in electrical contact with the switching unit; arranging the stator concentrically to the motor axis in the motor housing; and closing the motor housing with the bearing plate on which the rotor is held, wherein the rotor is arranged concentrically to the motor axis in the motor housing, wherein the plug connection is arranged in the opening of the bearing plate, wherein the plug connection is floatingly mounted on the switching unit, wherein the flexible and/or elastic contact arm is connected to the plug connection, which is attached to the switching unit, and wherein at the end facing away from the plug connection, the contact arm has the connection lug for contacting, which contacts the corresponding connection element of the switching unit via brazing.

Assignees

• Brose Fahrzeugteile Se & Co Kg Wuerzburg
• Brose Fahrzeugteile Se & Co Kg Bamberg

Inventors

• Geiling Christian
• Hauck Peter
• Obendorfer Moritz
• Thurmann Patrick

Classifications

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K3/522 Primary

  for generally annular cores with salient poles · CPC title

• B62D5/0403

  characterised by constructional features, e.g. common housing for motor and gear box · CPC title

• B60T13/74

  with electrical assistance or drive · CPC title

• H02K5/15

  Mounting arrangements for bearing-shields or end plates · CPC title