Patent · US Active

Shaft for an electric machine

US11489410B2 · kind B2 · utility

0Cited by

0References

13Claims

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 8, 2020
Grant date	Nov 1, 2022
Priority date	—
Expiry date	Jul 9, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH02K7/003
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A shaft (12) for cooling an electric machine (10) includes: an outer sub-shaft (32), which is designed for being rotationally fixed to a rotor (14) of the electric machine; an inner sub-shaft (30), which is rotationally fixed to the outer sub-shaft and is designed as an output shaft of the electric machine; an inflow (36) arranged in the radial direction between the outer sub-shaft and the inner sub-shaft, in order to supply cooling fluid (28) to the shaft; and an outflow (42) arranged in the radial direction between the outer sub-shaft and the inner sub-shaft, in order to discharge cooling fluid supplied to the shaft. The outer sub-shaft encloses a fluid chamber (40), which is arranged in the axial direction between the inflow and the outflow. A direction of flow of cooling fluid in the fluid chamber is established by a delivery direction of a fluid pump (24).

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