US 12,435,711 B2
Integrated electro-hydraulic unit housing
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 Sep. 12, 2023, as Appl. No. 18/465,819.
Prior Publication US 2025/0084837 A1, Mar. 13, 2025
Int. Cl. F04B 17/03 (2006.01); F04B 1/2028 (2020.01); F04B 1/2064 (2020.01); F04B 1/2071 (2020.01); F04B 1/2085 (2020.01); F04B 53/16 (2006.01); F04B 53/22 (2006.01); H02K 5/04 (2006.01); F01B 23/10 (2006.01); F01B 31/26 (2006.01)
CPC F04B 17/03 (2013.01) [F04B 1/2028 (2013.01); F04B 1/2064 (2013.01); F04B 1/2071 (2013.01); F04B 1/2085 (2013.01); F04B 53/16 (2013.01); F04B 53/22 (2013.01); H02K 5/04 (2013.01); F01B 23/10 (2013.01); F01B 31/26 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An integrated electro-hydraulic unit comprising:
a hydraulic machine including a rotary working group configured to pump a working fluid;
an electric machine encircling the hydraulic machine, the electric machine including a stator and a rotor coupled to the rotary working group such that the rotor drives the rotary working group about an axis; and
a housing at least partially surrounding the electric machine and the hydraulic machine, the housing including
a front cap having a front plate with a plurality of first tie rod openings,
an end cap having an end plate with a plurality of second tie rod openings,
a housing shell encircling the electric machine and positioned between the front cap and the end cap,
a plurality of tie rods, each tie rod having a first threaded end extending through a respective one of the plurality of first tie rod openings and a second end extending through a respective one of the plurality of second tie rod openings, and
a plurality of nuts threaded onto each of the first threaded ends of the plurality of tie rods and tightened onto the front cap such that the front cap, the end cap, and the housing shell are compressed via tension in the plurality of tie rods.