Cover device for an electronics housing of an electric motor

Patent metadata

Field	Value
Publication number	US-10211697-B2
Application number	US-201615368097-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Dec 4, 2015
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

The invention concerns a cover device for an electronics housing of an electric motor with at least one base segment and at least one rib formed on the base segment, wherein the base segment is geometrically configured so as to cover at least part of the surface of an electronics housing opening for drawing in a cooling air volume flow in order to close the electronics housing opening at least for a portion against the intrusion of solids, and the base segment forms with the at least one rib at least one flow duct, which can be fluidically connected to the electronics housing opening, and wherein the cover device is designed as a modular insert for the electronics housing.

First claim

The invention claimed is:

1. A cover device for an electronics housing of an electric motor with a base segment and at least one rib formed on the base segment, wherein the base segment is geometrically configured so as to cover at least part of a surface of an electronics housing opening for drawing in a cooling air volume flow in order to close the electronics housing opening at least for a portion against intrusion of solids, and the base segment forms with the at least one rib at least one flow duct, which can be fluidically connected to the electronics housing opening, and wherein the cover device is designed as a modular insert for the electronics housing, wherein several ribs are formed on the base segment as axial ribs, each time forming a flow duct with a surface of the base segment, and wherein the at least one rib includes several ribs that run at a slant radially inward, so that several flow ducts between the several ribs taper in the radially inward direction.

2. The cover device according to claim 1 , wherein the at least one flow duct runs perpendicular to a suction direction.

3. The cover device according to claim 1 , wherein the cover device is formed from the base segment and a cover segment, while between the base segment and the cover segment there extends the at least one rib, and the at least one rib, the base segment and the cover segment form the at least one flow duct.

4. The cover device according to claim 1 , wherein the cover device is in a shape of a ring or a partial ring.

5. The cover device according to claim 1 , wherein the base segment is conical in shape.

6. The cover device according to claim 3 , wherein the cover segment is arranged with an inward radial offset relative to a radial outer rim of the base segment.

7. The cover device according to claim 6 , wherein the at least one rib has a radial outer edge, which directly joins a radial outer rim of the base segment and a radial outer rim of the cover segment.

8. The cover device according to claim 7 , wherein at least one rib is flush with the radial outer rim of the base segment and/or flush with the radial outer rim of the cover segment.

9. The cover device according to claim 3 , wherein the at least one rib extends radially inward in the radial direction beyond a radial inner rim of the cover segment.

10. The cover device according to claim 1 , wherein the cover device is designed as one piece.

11. Use of the cover device according to claim 1 , on the electronics housing of the electric motor.

12. An electric motor, comprising an electronics housing with motor electronics housed therein, wherein the electronics housing has an integrated cooling air duct extending at least in an axial direction past the motor electronics, through which a cooling air volume flow can be delivered and which ends at the electronics housing opening, wherein the cover device according to claim 1 can be fastened to the electronics housing opening.

13. The electric motor according to claim 12 , wherein the electronics housing opening is formed by cooling ribs, and the at least one rib of the cover device extend parallel and/or in radial prolongation to the cooling ribs of the electronics housing.

14. The electric motor according to claim 13 , wherein the electronics housing opening has a radial opening segment, which is oriented perpendicular to an axis of rotation of the electric motor, wherein the radial opening segment is fluidically connected directly to the flow duct of the cover device.

15. The electric motor according to claim 12 , wherein the base segment is fully in contact with axial end faces of the cooling ribs of the electronics housing.

Assignees

• Ebm Papst Mulfingen Gmbh & Co Kg

Inventors

• Sturm Michael
• Sauer Thomas

Classifications

• H02K5/20 Primary

  with channels or ducts for flow of cooling medium · CPC title

• H02K11/33 Primary

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

• H02K11/0094

  Structural association with other electrical or electronic devices · CPC title

• H05K7/20145

  Means for directing air flow, e.g. ducts, deflectors, plenum or guides · CPC title

• H05K5/03

  Covers · CPC title