Electric machine comprising a pole housing

Patent metadata

Field	Value
Publication number	US-10355553-B2
Application number	US-201415121956-A
Country	US
Kind code	B2
Filing date	Dec 29, 2014
Priority date	Feb 27, 2014
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

Disclosed is an electric machine (10) comprising a pole housing (12) and a printed circuit board (14) for controlling the electric machine (10). The circuit board (14) is arranged on a flanged side (16) of the pole housing (12), and a protective wall (18) which protects the circuit board (14) from loose small parts is arranged between the circuit board (14) and the pole housing (12).

First claim

The invention claimed is:

1. An electric machine ( 10 ) comprising a pole housing ( 12 ) and a printed circuit board ( 14 ) for controlling the electric machine ( 10 ), wherein the printed circuit board ( 14 ) is arranged on a flanged side ( 16 ), which forms an axial end of the pole housing ( 12 ), characterized in that a discrete protective wall ( 18 ) is arranged between the printed circuit board ( 14 ) and the pole housing ( 12 ), the protective wall ( 18 ) protecting the printed circuit board ( 14 ) from loose small parts, characterized in that mechanical components ( 25 ) are arranged in the pole housing ( 12 ), which mechanical components comprise bearings ( 221 , 222 ) disposed on a shaft ( 19 ), a rotor ( 15 ) and a stator ( 20 ), the shaft ( 19 ) together with the bearings ( 221 , 222 ) and the rotor ( 15 ) being arranged concentrically, and the mechanical components also comprising an interconnection plate ( 21 ) disposed on the flanged side ( 16 ), wherein one of the bearings ( 222 ) is disposed in the interconnection plate and the printed circuit board ( 14 ) lies axially opposite to the mechanical components ( 25 ) and is isolated from the components ( 25 ) by the discrete protective wall ( 18 ).

2. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) is disposed axially outside of the pole housing ( 12 ).

3. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) is arranged in the pole housing ( 12 ).

4. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) is adapted in shape to the flanged side ( 16 ) of the interconnection plate ( 21 ).

5. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 , 181 ) does not have any holes.

6. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) has at least one guiding duct ( 24 ) for the shaft ( 19 ), said guiding duct ( 24 ) being arranged in a center of the protective wall ( 18 ).

7. The electric machine ( 10 ) according to claim 6 , characterized in that an edge ( 26 ) of the guiding duct ( 24 ) abuts against the bearing ( 222 ) which is disposed in the interconnection plate ( 21 ) and a radially outer edge ( 28 ) of the protective wall ( 18 ) abuts against the interconnection plate ( 21 ).

8. The electric machine ( 10 ) according to claim 1 , characterized in that the interconnection plate ( 21 ) comprises an axial projection ( 30 ), wherein an axial recess ( 31 ) is disposed contiguously on the projection ( 30 ) in a radially outward direction, wherein the projection ( 30 ) and the recess ( 31 ) extend along a circumferential direction of the interconnection plate ( 21 ), wherein the protective wall ( 18 ) rests with a region ( 29 ) of an edge ( 28 ) thereof on the projection ( 30 ) of the interconnection plate ( 21 ) and protrudes into the recess ( 31 ).

9. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) is mounted on a mechanical component ( 20 , 21 , 221 ) of the electric machine ( 10 ) or on the pole housing ( 12 ) by means of welding without additional material, or by means of adhesive bonding.

10. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) is mounted by means of a clip fastener or by means of screws.

11. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) is made of plastic.

12. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) is provided with an adhesive layer ( 32 ), the adhesive layer ( 32 ) being disposed on an opposite side in relation to the printed circuit board ( 14 ) and said adhesive layer ( 32 ).

13. The electric machine ( 10 ) according to claim 1 , characterized in that the adhesive layer ( 32 ) contains natural rubber, synthetic rubber and/or acrylate.

14. The electric machine ( 10 ) according to claim 1 , wherein the electric machine ( 10 ) is configured for adjusting movable parts in an engine compartment of a motor vehicle or as an adjustment drive for a window lifter, a sun roof drive, a trunk lid drive and or the drive of a gear switching mechanism.

15. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) consists of PA 66.

16. The electric machine ( 10 ) according to claim 1 , characterized in that the protective wall ( 18 ) is provided with an adhesive layer ( 32 ), the adhesive layer ( 32 ) being disposed on the opposite side in relation to the printed circuit board ( 14 ) and said adhesive layer ( 32 ) containing a casting compound.

Assignees

• Bosch Gmbh Robert

Inventors

• Meyer Christian
• Peters Markus
• Hansen Sebastian
• Gmuend Torsten
• Acker Christian

Classifications

• H02K5/10 Primary

  with arrangements for protection from ingress, e.g. water or fingers · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title