US 11,742,715 B2
Electric motor with heat dissipation for the motor shaft bearing
Michael Kisch, St. Georgen (DE); Wilhelm Weisser, Königsfeld/Buchenberg (DE); Jochen Scheffczyk, Villingen-Schwenningen (DE); Hassan Ghodsi-Khameneh, St. Georgen (DE); Daniel Hauer, Ortenberg (DE); Marcus Hellmann, Unterkirnach (DE); and Alexander Zwetkow, Rottweil (DE)
Assigned to ebm-papst St. Georgen GmbH & Co. KG, St. Georgen (DE)
Appl. No. 17/266,144
Filed by ebm-papst St. Georgen GmbH & Co. KG, St. Georgen (DE)
PCT Filed Aug. 20, 2019, PCT No. PCT/EP2019/072301
§ 371(c)(1), (2) Date Feb. 5, 2021,
PCT Pub. No. WO2020/048773, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 10 2018 121 923.7 (DE), filed on Sep. 7, 2018.
Prior Publication US 2021/0376694 A1, Dec. 2, 2021
Int. Cl. H02K 5/16 (2006.01); H02K 5/173 (2006.01); H02K 7/00 (2006.01); H02K 9/22 (2006.01)
CPC H02K 5/1732 (2013.01) [H02K 7/003 (2013.01); H02K 9/223 (2021.01); H02K 9/227 (2021.01); H02K 2211/03 (2013.01)] 16 Claims
OG exemplary drawing
 
15. An electric motor with a motor housing comprising:
a shaft section for receiving a motor shaft and a motor section for receiving motor electronics and motor windings, the shaft section and the motor section are separated from each other in a sealed manner by a separating pot arranged in the motor housing, a metal ball bearing pot is arranged in the separating pot, a ball bearing is fixed in the ball bearing pot, the ball bearing pot lies indirectly against a motor housing section that is connected to the outer surroundings, via the separating pot, such that the motor housing functions as a cooling body;
heat generated by the ball bearing during operation is dissipated onto the motor housing and the outer surroundings via the ball bearing pot and the separating pot; and
the motor housing and the separating pot are made of plastic, and the ball bearing pot, made of metal, is directly overmolded with the plastic.