US 11,990,819 B2
Electric and hydraulic machine
Enrique Busquets, Fountain Inn, SC (US); Uwe Neumann, Fountain Inn, SC (US); Andrea Vacca, Lafayette, IN (US); and Federico Zappaterra, Ferra (IT)
Assigned to Bosch Rexroth Corporation, Charlotte, NC (US)
Filed by Bosch Rexroth Corporation, Charlotte, NC (US)
Filed on Nov. 24, 2020, as Appl. No. 17/103,191.
Prior Publication US 2022/0166284 A1, May 26, 2022
Int. Cl. H02K 5/20 (2006.01); F04B 53/08 (2006.01); F04C 2/10 (2006.01); H02K 9/19 (2006.01); F04C 2/08 (2006.01); F04C 11/00 (2006.01); F04C 15/00 (2006.01); F04D 13/06 (2006.01); F04D 25/08 (2006.01); F04D 29/58 (2006.01)
CPC H02K 5/20 (2013.01) [F04B 53/08 (2013.01); F04C 2/102 (2013.01); H02K 9/19 (2013.01); F04C 2/084 (2013.01); F04C 11/008 (2013.01); F04C 15/0096 (2013.01); F04C 2240/30 (2013.01); F04C 2240/40 (2013.01); F04D 13/06 (2013.01); F04D 25/082 (2013.01); F04D 29/5806 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric and hydraulic machine comprising:
a housing defining a motor chamber and a pump chamber;
a motor comprising a rotor and a stator positioned within the motor chamber;
a pump comprising a pumping element positioned within the pump chamber, the pumping element movable by the motor to displace fluid in the pump chamber, the pump chamber including a low-pressure chamber and a high-pressure chamber, a unit inlet defined by the housing and in communication with the low-pressure chamber, and a unit outlet defined by the housing and in communication with the high-pressure chamber, the pump chamber positioned radially inward of the motor chamber such that the pump is nested within the motor; and
a radial cooling channel extending in a radial direction from the low-pressure chamber to the motor chamber such that the fluid in the pump chamber communicates with the rotor and the stator to cool the motor.