Patent · US Active

Heat sink for an electric machine

US11581784B2 · kind B2 · utility

0Cited by

2References

15Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Martin Lang · Wegscheid, DE
Thomas Auer · Metnitz, AT
Sebastian Paulik · Ramstein-Miesenbach, DE
Harald Wendl · Vilshofen, DE
Gerhard Obermaier · Albersbach, DE
Maria Lang · Hauzenberg, DE

Key dates

Filing date	Jun 5, 2020
Grant date	Feb 14, 2023
Priority date	—
Expiry date	Oct 2, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH02K9/227
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A heat sink (30) for cooling an electric machine (10), includes: a first part of the heat sink (32) in the form of a hollow cylinder, wherein an inner lateral surface includes a groove (34) extending helically with respect to a central axis of the hollow cylinder; a second part of the heat sink (36) in the form of a hollow cylinder, which includes a radially internal fin (38); and a third part of the heat sink (40) in the form of a hollow cylinder, which includes a connecting section (52), in order to accommodate an output shaft (12) of the machine in a rotationally fixed manner. The second part of the heat sink is accommodated, at least partially, in the first part of the heat sink, so that a radially external surface of the second part of the heat sink rests against the groove.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.