Integrated electro-hydraulic unit

An integrated electro-hydraulic unit comprising:

• an electric machine including a stator and a rotor;
• and
• a hydraulic machine including a shaft configured to rotate around a central axis and a cylinder block coupled to the shaft, the cylinder block having a plurality of bores receiving a plurality of pistons, wherein a swashplate cooperates with the plurality of pistons to generate reciprocating movement of the plurality of pistons within the plurality of bores upon rotation of the cylinder block,
• wherein the cylinder block and the shaft are coupled via a joint that accommodates bending of the shaft while maintaining a parallel orientation of the cylinder block with respect to the central axis,
• wherein the plurality of pistons include ball ends movable about the central axis and along the swashplate to define a piston plane parallel to the swashplate,
• wherein an axial center point of the joint is located at an intersection of the piston plane and the central axis.

An integrated electro-hydraulic unit comprising:

• an electric machine including a stator and a rotor, the rotor including an axial center;
• and
• a hydraulic machine including a shaft configured to rotate around a central axis and a cylinder block coupled to the shaft, 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,
• wherein the cylinder block and the shaft are coupled via a joint that accommodates bending of the shaft while maintaining a parallel orientation of the cylinder block with respect to the central axis, wherein the joint is defined by a portion having a crowning shaft geometry of the shaft and a corresponding interior receiving portion of the cylinder block,
• wherein a center point of the joint is axially aligned with the axial center of the rotor,
• wherein the portion having the crowning shaft geometry is formed by rounding about a constant radius centered outside the shaft as viewed transverse to the central axis.