Machine component of an electric machine and method for production thereof

Patent metadata

Field	Value
Publication number	US-2016294244-A1
Application number	US-201615083900-A
Country	US
Kind code	A1
Filing date	Mar 29, 2016
Priority date	Mar 30, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A machine component of an electric machine includes a metal base body and a sealing element, arranged on the base body, for thermally decoupling the machine component and a unit abutting it. The base body is manufactured by pressure die-casting. The sealing element is made from plastic and is connected to the base body in a form-fit manner during the pressure die-casting of the base body.

First claim

What is claimed is:

1 . A machine component of an electric machine, comprising:
a metal base body made by a pressure die-casting process; and a sealing element arranged on the base body and configured to thermally decouple the machine component and an abutting unit, said sealing element being made from plastic and connected in form-fit manner to the base body as the base body undergoes the pressure die-casting process.

2 . The machine component of claim 1 , wherein the sealing element has sealing surfaces abutting the base body, each said sealing surface having at least one depression having a labyrinth-shaped configuration.

3 . The machine component of claim 2 , wherein at least one of the sealing surfaces adjoins a partial surface of the sealing element, which partial surface forms part of an outer surface of the machine component.

4 . The machine component of claim 1 , wherein the base body is made from aluminum or an aluminum alloy.

5 . The machine component of claim 1 , wherein the sealing element is made manufactured from a thermosetting material.

6 . The machine component of claim 1 , constructed in the form of a bearing shield of the electric machine.

7 . The machine component of claim 1 , wherein the sealing element has a substantially disk-shaped configuration.

8 . A method for manufacturing a machine component, comprising:
placing a sealing element into a die-casting mold, so that a partial surface of the sealing element abuts the die-casting mold and filling the die-casting mold with a metal molten mass to pressure die-cast a base body and thereby connect the sealing element in form-fit manner to the base body.

9 . The method of claim 8 , further comprising manufacturing the sealing element such that a surface thereof defines sealing surfaces which have each at least one depression having a labyrinth-shaped configuration and which during pressure die-casting of the base body are encapsulated with the metal molten mass.

10 . The method of claim 9 , wherein at least one of the sealing surfaces is attached to the partial surface of the sealing element abutting the die-casting mold during the pressure die-casting.

11 . The method of claim 9 , wherein the sealing element is designed and positioned in the die-casting mold such that the metal molten mass with which the die-casting mold is filled for pressure die-casting the base body cools more quickly in regions of the sealing surfaces of the sealing element than in other regions within the die-casting mold.

12 . The method of claim 9 , wherein the sealing element is designed and positioned in the die-casting mold such that turbulent flows of the metal molten mass with which the die-casting mold is filled for pressure die-casting the base body are reduced in regions of the sealing surfaces of the sealing element.

13 . The method of claim 9 , wherein the metal molten mass with which the die-casting mold is filled to pressure die-cast the base body is an aluminum alloy at a temperature of approximately 700 degrees Celsius.

14 . An electric machine, comprising:
a machine component comprising a metal base body made by a pressure die-casting process, and a sealing element arranged on the base body and configured to thermally decouple the machine component and an abutting unit, said sealing element being made from plastic and connected in form-fit manner to the base body as the base body undergoes the pressure die-casting process; and a unit abutting the sealing element of the machine component.

15 . The electric machine of claim 14 , wherein the machine component is a bearing shield, said unit being a sensor housing of a sensor.

Assignees

• Siemens Ag

Inventors

• Bähr Hubertus
• Eckert Rainer
• Holzheimer Martin
• Volkmuth Benjamin

Classifications

• H02K5/06

  Cast metal casings · CPC title

• B22D17/00

  Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure · CPC title

• H02K5/15

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

• H02K5/02

  Casings or enclosures characterised by the material thereof · CPC title

• B22D21/007

  with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C · CPC title