US 12,442,444 B2
System for reducing teeth power losses in a gearbox
Eric Jallat, Illkirch-Graffenstaden (FR); Thomas Gaulier, Wolfisheim (FR); and Thomas Marmagne, Strasbourg (FR)
Assigned to FLENDER-GRAFFENSTADEN S.A.S., Illkirch-Graffenstaden (FR)
Appl. No. 18/276,739
Filed by FLENDER-GRAFFENSTADEN S.A.S., Illkirch-Graffenstaden (FR)
PCT Filed Feb. 1, 2022, PCT No. PCT/EP2022/052258
§ 371(c)(1), (2) Date Aug. 10, 2023,
PCT Pub. No. WO2022/171479, PCT Pub. Date Aug. 18, 2022.
Claims priority of application No. 21290005 (EP), filed on Feb. 11, 2021.
Prior Publication US 2024/0133459 A1, Apr. 25, 2024
Prior Publication US 2024/0229917 A9, Jul. 11, 2024
Int. Cl. F16H 57/04 (2010.01); F16H 57/021 (2012.01)
CPC F16H 57/0409 (2013.01) [F16H 57/021 (2013.01); F16H 57/0423 (2013.01); F16H 57/0456 (2013.01)] 12 Claims
OG exemplary drawing
 
1. System for reducing teeth power losses in a gearbox, wherein the system comprises:
at least two intermeshing toothed gears, each attached to a rotating shaft supported by bearings and mounted within a housing;
two vertical plates configured for being installed inside the housing between the bearings and the toothed gears, one at each side of the toothed gears, each vertical plate comprising two lateral sides;
wherein the vertical plates comprise at least one shield configured for separating oil flows within the housing;
wherein at least one internal shield being mounted on and fixed to one of the two lateral sides of the vertical plates directed towards the toothed gears;
wherein the at least one internal shield comprises at least one anti-recirculation plate, wherein
the at least one anti-recirculation plate comprises one or several vertical fins for breaking an axial flow of an air-oil mixture; and
wherein the at least one anti-recirculation plate comprises a first inclined plane, wherein an extension of said first inclined plane towards teeth of the closest toothed gear intersects said toothed gear at the root diameter of one of its teeth, being tangential to said root diameter.