US 12,031,559 B1
Integrated electro-hydraulic unit
Enrique Busquets, Greer, SC (US); and Andreas Guender, Lohr Am Main (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Jul. 7, 2023, as Appl. No. 18/348,760.
Int. Cl. F04B 17/03 (2006.01); F15B 15/14 (2006.01); F04B 1/20 (2020.01)
CPC F15B 15/1404 (2013.01) [F04B 1/20 (2013.01); F04B 17/03 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An integrated electro-hydraulic unit comprising:
a hydraulic machine including a shaft and a cylinder block coupled to the shaft, the shaft configured to rotate around a central axis, the cylinder block having a plurality of pistons within the cylinder block, the cylinder block configured to rotate about the central axis to generate reciprocating movement of each of the plurality of pistons, the cylinder block having a distal portion spaced from the central axis, the distal portion having an axial span measured parallel to the central axis between first and second axial ends of the distal portion;
an electric machine including a stator and a rotor comprising a plurality of rotor plates, the rotor having an axial span measured parallel to the central axis between first and second axial ends of the rotor, wherein the axial span of the rotor is larger than the axial span of the distal portion of the cylinder block; and
a drive flange situated radially outside the cylinder block and radially within the rotor to define an interface between the distal portion of the cylinder block and the rotor,
wherein the plurality of stacked plates is secured to a rotor-receiving exterior portion of the drive flange, and the distal portion of the cylinder block is secured to a cylinder block-receiving interior portion of the drive flange, and
wherein the axial span of the distal portion of the cylinder block extends outside the axial span of the rotor.