Brush holder for an electric motor, and gear mechanism drive unit having a brush holder

Patent metadata

Field	Value
Publication number	US-9496764-B2
Application number	US-201414186240-A
Country	US
Kind code	B2
Filing date	Feb 21, 2014
Priority date	Feb 21, 2013
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A brush holder ( 100 ) for an electric motor ( 12 a; 12 b ), having a brush holder main body ( 20 ) which has a passage opening ( 25 ) for an armature shaft to pass through, having a first receiving region ( 37 ) for fastening a printed circuit board ( 35 ), on which electrical or electronic components are mounted, to the brush holder main body ( 20 ), wherein the first receiving region ( 37 ) extends as far as into a region between an outer boundary ( 23, 24 ) of the brush holder main body ( 20 ) and the passage opening ( 25 ), and wherein the first receiving region ( 37 ) for the printed circuit board ( 35 ) is designed to arrange the printed circuit board ( 35 ) on the brush holder main body ( 20 ) at least substantially perpendicularly to the plane of the brush holder main body ( 20 ), and having components ( 26, 33 ) which are arranged on the brush holder main body ( 20 ) and which are mechanically and/or electrically connected at least indirectly to the printed circuit board ( 35 ).

First claim

What is claimed is:

1. A brush holder ( 100 ) for an electric motor ( 12 a ; 12 b ), having a brush holder main body ( 20 ) which has a passage opening ( 25 ) for an armature shaft to pass through, having a first receiving region ( 37 ) for receiving and fastening a printed circuit board ( 35 ) in a first position, on which electrical or electronic components are mounted, to the brush holder main body ( 20 ), wherein the first receiving region ( 37 ) extends as far as into a region between a first outer boundary ( 23 ) of the brush holder main body ( 20 ) and the passage opening ( 25 ), and wherein the first receiving region ( 37 ) for the printed circuit board ( 35 ) is configured to arrange the printed circuit board ( 35 ) on the brush holder main body ( 20 ) at least substantially perpendicularly to the plane of the brush holder main body ( 20 ), and having components ( 26 , 33 ) which are arranged on the brush holder main body ( 20 ) and which are mechanically and/or electrically connected at least indirectly to the printed circuit board ( 35 ), wherein the brush holder main body ( 20 ) has a second receiving region ( 38 ) for receiving and fastening the printed circuit board ( 35 ) in a second position, wherein the second receiving region ( 38 ) is arranged on that side of the passage opening ( 25 ) which is situated opposite the first receiving region ( 37 ) between a second outer boundary ( 24 ) of the brush holder main body ( 20 ) and the passage opening ( 25 ), wherein the brush holder main body ( 20 ) has receiving spaces ( 29 , 30 ) for the components ( 26 , 33 ), which receiving spaces allow at least indirect connection of the components ( 26 , 33 ) to the printed circuit board ( 35 ) at the first and second receiving regions ( 37 , 38 ), wherein the first and the second receiving regions ( 37 , 38 ) are arranged symmetrically in relation to a plane ( 22 ) of symmetry of the brush holder main body ( 20 ) which lies in the longitudinal axis of the passage bore ( 25 ), wherein the first and second receiving regions ( 37 , 38 ) are arranged approximately parallel to the first and second outer boundaries ( 23 , 24 ), and wherein the first and second outer boundaries ( 23 , 24 ) are flat lateral boundary edges of the brush holder main body ( 20 ), corresponding to an outer shape of a motor housing 21 of the electric motor ( 12 a ; 12 b ).

2. The brush holder according to claim 1 , wherein two carbon guide elements ( 31 ) are arranged on the brush holder main body ( 20 ), said carbon guide elements being arranged at an angle (α) of approximately 90° in relation to one another, and in that the printed circuit board ( 35 ), which is arranged in one of the first and second receiving regions ( 37 , 38 ), extends by way of one end face ( 39 ) as far as directly against one of the carbon guide elements ( 31 ).

3. The brush holder according to claim 1 , wherein an electrical connection element ( 26 ) is arranged between the first and second receiving regions ( 37 , 38 ), said electrical connection element serving to connect the brush holder main body ( 20 ) to a connection plug on the vehicle, and in that the connection element ( 26 ) is arranged in the plane ( 22 ) of symmetry of the brush holder main body ( 22 ).

4. The brush holder according to claim 1 , characterized in that the brush holder main body ( 20 ) is composed of plastic and is in the form of an injection-molded part.

5. A gear mechanism drive unit ( 10 a ; 10 b ) for a convenience drive in a motor vehicle, having a gear mechanism housing ( 11 a ; 11 b ) to which a drive motor ( 12 a ; 12 b ) having a brush holder ( 100 ) according to claim 1 is fastened.

6. The gear mechanism drive unit ( 10 a ; 10 b ) according to claim 5 , characterized in that an electronics housing ( 14 a , 14 b ) is integrated on the gear mechanism housing ( 11 a ; 11 b ), such that the printed circuit board ( 35 ) can be inserted into said electronics housing.

7. The gear mechanism drive unit ( 10 a ; 10 b ) according to claim 5 , wherein the printed circuit board ( 35 ) can be inserted radially in relation to the armature shaft, wherein Hall sensors are arranged on the printed circuit board ( 35 ), said Hall sensors interacting with a transmitter magnet, which is arranged on a rotor shaft ( 13 ) of the gear mechanism drive unit ( 10 ; 10 b ), in order to detect the position of the rotor shaft ( 13 ) when the printed circuit board ( 35 ) is in the inserted state.

8. The gear mechanism drive unit ( 10 a ; 10 b ) according to claim 5 , wherein the printed circuit board ( 35 ) is inserted into the first receiving region ( 37 ) or the second receiving region ( 38 ) after the brush holder main body is completely mounted between the drive motor ( 12 a , 12 b ) and the gear mechanism housing ( 11 a , 11 b ).

9. The brush holder according to claim 1 , wherein two carbon guide elements ( 31 ) are arranged on the brush holder main body ( 20 ), said carbon guide elements being arranged at an angle (α) approximately 90° in relation to one another, and in that the printed circuit board ( 35 ), which is arranged in one of the first and second receiving regions ( 37 , 38 ), extends by way of one end face ( 39 ) as far as directly against one of the carbon guide elements ( 31 ), wherein the carbon guide elements ( 31 ) are arranged approximately symmetrically to the plane ( 22 ) of symmetry.

10. The brush holder according to claim 1 , wherein an electrical connection element ( 26 ) is arranged between the first and second receiving regions ( 37 , 38 ), said electrical connection element serving to connect the brush holder main body ( 20 ) to a connection plug on the vehicle, and in that the connection element ( 26 ) is arranged in the plane ( 22 ) of symmetry of the brush holder main body ( 22 ), wherein the connection element ( 26 ) will be electrically connected to the motor current contacts which are arranged on the printed circuit board ( 35 ) when said printed circuit board is inserted.

11. The gear mechanism drive unit ( 10 a ; 10 b ) according to claim 5 , characterized in that an electronics housing ( 14 a , 14 b ) is integrated on the gear mechanism housing ( 11 a ; 11 b ), such that the printed circuit board ( 35 ) can be inserted into said electronics housing tangentially to the passage opening ( 25 ) in the brush holder main body ( 20 ).

12. A brush holder ( 100 ) for an electric motor ( 12 a ; 12 b ), having a brush holder main body ( 20 ) which has a passage opening ( 25 ) for an armature shaft to pass through, having a first receiving region ( 37 ) for fastening a printed circuit board ( 35 ), on which electrical or electronic components are mounted, to the brush holder main body ( 20 ), wherein the first receiving region ( 37 ) extends as far as into a region between an outer boundary ( 23 , 24 ) of the brush holder main body ( 20 ) and the passage opening ( 25 ), and wherein the first receiving region ( 37 ) for the printed circuit board ( 35 ) is configured to arrange the printed circuit board ( 35 ) on the brush holder main body ( 20 ) at least substantially perpendicularly to the plane of the brush holder main body ( 20 ), and having components ( 26 , 33 ) which are arranged on the brush holder main body ( 20 ) and which are mechanically and/or electrically connected at least indirectly to the printed circuit board ( 35 ), wherein the brush holder main body ( 20 ) has a second receiving region ( 38 ) for the printed circuit board ( 35 ), wherein the second receiving region ( 38 ) is arranged on that side of the passage opening ( 25 ) which is situated opposite the first

Assignees

• Bosch Gmbh Robert

Inventors

• Huck Thomas
• Keller Hanspeter
• Bohr Peter
• Mili Tarek

Classifications

• H02K5/14 Primary

  Means for supporting or protecting brushes or brush holders · CPC title

• H02K5/148 Primary

  Slidably supported brushes · CPC title

• H02K7/116

  with gears · CPC title

• H02K11/38

  Control circuits or drive circuits associated with geared commutator motors of the worm-and-wheel type · CPC title

• H02K7/1166

  comprising worm and worm-wheel (structural association with bearings specially adapted for worm gear drives H02K7/081) · CPC title