The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2022
Filed:
Jun. 08, 2020
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Martin Lang, Wegscheid, DE;
Thomas Auer, Passau, DE;
Sebastian Paulik, Tiefenbach, DE;
Harald Wendl, Vilshofen, DE;
Gerhard Obermaier, Tiefenbach, DE;
Maria Lang, Hauzenberg, DE;
ZF FRIEDRICHSHAFEN AG, Friedrichshafen, DE;
Abstract
A shaft () for cooling an electric machine () includes: an outer sub-shaft (), which is designed for being rotationally fixed to a rotor () of the electric machine; an inner sub-shaft (), which is rotationally fixed to the outer sub-shaft and is designed as an output shaft of the electric machine; an inflow () arranged in the radial direction between the outer sub-shaft and the inner sub-shaft, in order to supply cooling fluid () to the shaft; and an outflow () 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 (), 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 ().