US 12,104,667 B2
Brake system having multiple pressure pistons for an electric wheel drive unit, and wheel drive unit
Doris Maria Wimmer, Ottenhöfen (DE); Simon Ortmann, Baden-Baden (DE); and Philippe Wagner, Souffelweyersheim (FR)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 17/312,305
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Dec. 6, 2019, PCT No. PCT/DE2019/101051
§ 371(c)(1), (2) Date Jun. 9, 2021,
PCT Pub. No. WO2020/119859, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 102018131876.6 (DE), filed on Dec. 12, 2018.
Prior Publication US 2022/0025944 A1, Jan. 27, 2022
Int. Cl. F16D 55/36 (2006.01); B60K 7/00 (2006.01); F16D 55/40 (2006.01); F16D 65/18 (2006.01); B60B 27/04 (2006.01); F16D 65/78 (2006.01); F16D 121/04 (2012.01); F16D 127/02 (2012.01)
CPC F16D 55/40 (2013.01) [B60K 7/0007 (2013.01); F16D 65/186 (2013.01); B60B 27/04 (2013.01); B60K 2007/0092 (2013.01); F16D 2065/785 (2013.01); F16D 2121/04 (2013.01); F16D 2127/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A brake system for an electric wheel drive unit, comprising:
a housing configured to be secured to a vehicle frame, which housing has a flange portion and a wheel carrier portion secured to the flange portion,
a first brake component connected to the housing, the first brake component having a first support part attached directly to a radial outer side of the wheel carrier portion and a first brake disc element rotationally fixed to the first support part,
a second brake component rotatably mounted relative to the housing, the second brake component having a second support part and a second brake disc element which is rotationally fixed to the second support part, and which is designed and arranged for frictional connection with the first brake disc element, and
a hydraulic actuating device provided with at least one or more pressure pistons, the actuating device being arranged such that the pressure pistons are arranged in a radial direction of an axis of rotation of the second brake component within the brake disc elements and a sliding element moveably coupling the one or more pressure pistons with one of the brake disc elements, wherein:
a counterpressure plate is arranged on an axial side of the brake disc elements facing away from the sliding element and the counterpressure plate is secured directly on the outer side of the wheel carrier portion; and
the counterpressure plate is fixed in the axial direction by a nut screwed onto the wheel carrier portion.