# US 12,113,423 B2 · Electric motor with integrated pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,423 B2 - Document ID: US12113423B2 - Status: Granted - Kind: B2 - Application number: 17/651,050 - Filed: 2022-02-14 - Published: 2023-08-17 - Granted: 2024-10-08 - Earliest claimed: 2022-02-14 - Assignees: Dana Motion Systems Italia S.R.L. - Applicants: Dana Motion Systems Italia S.R.L. - Inventors: David Gambuzzi; Luca Buscicchio - Web page: https://patentgrep.com/patent/US12113423B2 ## CPC - F04C 2/14: with toothed rotary pistons - H02K 5/18: with ribs or fins for improving heat transfer - F01C 21/02: Arrangements of bearings (bearing constructions F16C) - F04C 2/084: {Toothed wheels} - F04C 2/086: {Carter} - F04C 15/0061: {Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions} - F04C 15/008: {Prime movers} - F04C 15/0096: {Heating; Cooling (of machines or engines in general F01P)} - F15B 15/18: Combined units comprising both motor and pump - H02K 5/04: Casings or enclosures characterised by the shape, form or construction thereof - F04C 2210/206: Oil - F04C 2240/30: Casings or housings - F04C 2240/40: Electric motor - F05C 2201/021: Aluminium - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F01C: ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00) - F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR - F05C: INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES ## Abstract A system is disclosed including an electric motor having a rotor shaft, a hydraulic pump including a gear; and an end bell housing enclosing an end of the electric motor, the end housing having a plurality of cooling fins, the end housing further supporting the gear coupled to the rotor shaft, the gear pressurizing hydraulic fluid. ## Claims ### Claim 1 A system, comprising: an electric motor having a rotor shaft; a hydraulic pump including a gear; and an end bell housing enclosing an end of the electric motor, the end bell housing having a plurality of cooling fins, the end bell housing further supporting the gear coupled to the rotor shaft, the gear pressurizing hydraulic fluid and coupled to the rotor shaft via a shaft gear insert inserted into a coupling cavity of the gear, wherein the gear is an upper gear of a pair of gears, wherein the end bell housing is a single, continuous, and monolithic end housing, and an independent gear is configured to support the rotor shaft and the pair of gears, and wherein the independent gear is a counter rotational balance to the rotor shaft. ### Claim 2 (depends on 1) The system of claim 1, wherein the shaft gear insert terminates in the coupling cavity. ### Claim 3 (depends on 2) The system of claim 2, further comprising a pump flange directly coupled to the end bell housing to enclose the hydraulic pump, the pump flange having a hydraulic port to supply the pressurized hydraulic fluid. ### Claim 4 (depends on 1) The system of claim 1, wherein the cooling fins are horizontal and vertically aligned. ### Claim 5 (depends on 4) The system of claim 4, wherein the hydraulic pump includes a second gear vertically below the gear and meshing with the gear to form the pump. ### Claim 6 (depends on 3) The system of claim 3, wherein the flange includes a plurality of longitudinal through holes with connectors coupling the flange to the end bell housing. ### Claim 7 (depends on 1) The system of claim 1, further comprising a motor side mount directly coupled to the end bell housing. ### Claim 8 (depends on 1) The system of claim 1, wherein the end bell housing forms an integrated, unitary, and monolithic closing flange and pump body. ### Claim 9 (depends on 1) The system of claim 1, wherein the end bell housing consists essentially of aluminum. ### Claim 10 (depends on 1) The system of claim 1, wherein the end bell housing does not include hydraulic fluid ducts, and wherein the end bell housing does not include hydraulic fluid ports, the hydraulic pump formed of the gear and a second gear of the pair of gears, the gear and the second gear being the only gears and solely pressurizing hydraulic fluid. ### Claim 11 A system, comprising: a vehicle including an electric motor having a rotor shaft, a pair of gears forming a hydraulic pump, and an end bell housing enclosing an end of the electric motor, the end bell housing having a plurality of cooling fins, the end bell housing further supporting the pair of gears, with one of the pair of gears directly coupled to and driven by the rotor shaft, the end bell housing thereby supporting the hydraulic pump, wherein the rotor shaft comprises a shaft gear insert that extends into a coupling cavity of an upper gear of the pair of gears, wherein the end bell housing is a single, continuous, and monolithic end bell housing, and an independent gear is configured to support the rotor shaft and the pair of gears, and wherein the independent gear is a counter rotational balance to the rotor shaft; and the vehicle further including a hydraulic system with an actuator, the hydraulic system fluidically coupled with the hydraulic pump, the pump generating pressure to drive the actuator. ### Claim 12 (depends on 11) The system of claim 11, further comprising a pump flange directly coupled to the end bell housing to enclose the pump, the pump flange having a hydraulic port. ### Claim 13 (depends on 11) The system of claim 11, wherein the cooling fins are horizontal and vertically aligned. ### Claim 14 (depends on 12) The system of claim 12, wherein the flange includes a plurality of longitudinal through holes with connectors coupling the flange to the end bell housing. ### Claim 15 (depends on 14) The system of claim 14, further comprising a motor side mount directly coupled to the end bell housing. ### Claim 16 (depends on 15) The system of claim 15, wherein the end bell housing forms an integrated, unitary, and monolithic closing flange and pump body. ### Claim 17 (depends on 16) The system of claim 16, wherein the end bell housing consists essentially of aluminum, wherein the end bell housing does not include hydraulic fluid ducts, wherein the end bell housing does not include hydraulic fluid ports, and wherein the motor is mounted longitudinally in a wheeled vehicle. ### Claim 18 (depends on 17) The system of claim 17, wherein one of the pair of gears of the hydraulic pump is positioned vertically below the rotor shaft. ### Claim 19 A system, comprising: an electric motor having a rotor shaft; a pair of gears forming a hydraulic pump; and an end bell housing with a substantially circular perimeter, the end bell housing enclosing an end of the electric motor, the end bell housing having a plurality of cooling fins, the end bell housing further supporting the pair of gears coupled to a shaft gear insert of the rotor shaft inserted into a coupling cavity of an upper gear of the pair of gears, a lower gear of the pair of gears coupled to an independent gear that is a counter rotational balance to the rotor shaft, the end bell housing supporting the hydraulic pump via bearings coupled in the end bell housing, and the end bell housing closed by a pump flange directly coupled to the end bell housing.