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:
Dec. 13, 2022
Filed:
May. 19, 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 cooling arrangement for an electric machine () includes a rotatably mounted rotor shaft (). A rotatably mounted hollow shaft () is mounted coaxially to the rotor shaft () and rotationally fixed to the rotor shaft (). A hollow shaft inner side () is spaced apart from a rotor shaft outer side () in a radial direction (R) in order to form an annular gap (). At least one cooling duct for a cooling lubricant includes a hollow shaft duct (), a feed duct (), and an outlet duct (). The feed duct () opens into the hollow shaft duct () in order to feed the cooling lubricant to the hollow shaft duct (). The outlet duct () extends from the hollow shaft duct () to the annular gap () in order to release the cooling lubricant from the hollow shaft duct () into the annular gap ().