US 11,999,574 B2
Reel motor with closed cooling circuit
Tobias Sieger, Geisingen (DE); Johannes Fehrenbach, Unterkimach (DE); Jörg Hornberger, Dornstetten-Aach (DE); and Markus Flaig, Hardt (DE)
Assigned to ebm-papst St. Georgen GmbH & Co. KG, St. Georgen (DE)
Appl. No. 16/978,700
Filed by ebm-papst St. Georgen GmbH & Co. KG, St. Georgen (DE)
PCT Filed May 16, 2019, PCT No. PCT/EP2019/062599
§ 371(c)(1), (2) Date Sep. 6, 2020,
PCT Pub. No. WO2019/228819, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 10 2018 112 912.2 (DE), filed on May 30, 2018.
Prior Publication US 2021/0006126 A1, Jan. 7, 2021
Int. Cl. B65G 23/08 (2006.01); H02K 3/24 (2006.01); H02K 7/10 (2006.01); H02K 9/06 (2006.01); H02K 9/10 (2006.01)
CPC B65G 23/08 (2013.01) [H02K 3/24 (2013.01); H02K 7/1012 (2013.01); H02K 9/06 (2013.01); H02K 9/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A reel motor for a driven conveyor roller comprising:
a stator surrounded by a stator housing and a rotor driving a rotor shaft;
a tubular external housing runs around the stator housing at a distance in the circumferential direction;
a cooling duct, is fluidically connected to an interior of the stator housing holding the stator, the cooling duct is formed between the external housing and the stator housing; and
an impeller wheel is secured to the rotor shaft, the impeller wheel generates a cooling air flow, the interior of the stator housing and the cooling duct determine a closed cooling circuit through which the cooling air flow is guided.