# US 10,374,498 B2 · Electric drive unit provided with drive outlets that are operable independently to each other > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,498 B2 - Document ID: US10374498B2 - Status: Granted - Kind: B2 - Application number: 15/302,891 - Filed: 2015-04-07 - Published: 2017-02-09 - Granted: 2019-08-06 - Earliest claimed: 2014-04-08 - Assignees: Aaco Manufacturing S.R.L. - Applicants: Aaco Manufacturing S.R.L. - Inventors: Roberta Cozza; Luicano Cozza; Marco Gattazzo - Web page: https://patentgrep.com/patent/US10374498B2 ## CPC - H02K 16/00: Machines with more than one rotor or stator {(machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029)} - H02K 5/16: Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields (magnetic bearings H02K7/09) - H02K 5/24: specially adapted for suppression or reduction of noise or vibrations - H02K 5/225: {Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132)} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract An electric motor unit includes a casing, a first electric motor and a second electric motor, housed within the casing, a drive shaft operatively connected to the first electric motor and a drive shaft operatively connected to the second electric motor, in which the drive shafts can be rotatably actuated in an independent way with respect to each other around a same rotational axis. ## Claims ### Claim 1 An electric motor unit comprising a casing, a first electric motor and a second electric motor, housed within said casing, said first electric motor comprising a first stator winding and said second electric motor comprising a second stator winding, a first drive shaft, which can be rotatably actuated around a rotational axis, operatively connected to said first electric motor, a second drive shaft, which can be rotatably actuated around said rotational axis, operatively connected to said second electric motor, said casing comprising a first half-shell, a second half-shell, and a spacer element interposed between said first half-shell and said second half-shell, said first half-shell, said second half-shell and said spacer element being removably connectable to each other by means of connection means, wherein said first electric motor is housed in a position interposed between said spacer element and said first half-shell and said second electric motor is housed in a position interposed between said spacer element and said second half-shell, wherein in that said first half-shell has, at the portion which during use faces said spacer element, an inner annular seat for at least partially housing said first stator winding of said first electric motor and said second half-shell has, at the portion which during use faces said spacer element an inner annular seat for at least partially housing said stator winding of said second electric motor, said spacer element has at opposite end portions which during use respectively face said first half-shell and said second half-shell, a first inner annular seat and a second annular seat for at least partially housing respectively said stator winding of said first electric motor and said second electric motor. ### Claim 2 (depends on 1) The electric motor unit according to claim 1, wherein said drive shaft of said first electric motor and said drive shaft of said second electric motor are rotatably supported in an independent way with respect to each other in said casing, by means of bearings. ### Claim 3 (depends on 1) The electric motor unit according to claim 1, wherein said first half-shell and said second half-shell each have, on the outer part thereof, at least one pair of flanged elements provided with a through opening. ### Claim 4 (depends on 3) The electric motor unit according to claim 3, wherein said means for removably connecting said first half-shell with said spacer element and with said second half-shell are configured engageable in said through openings of said flanged elements of said first half-shell and of said second half-shell. ### Claim 5 (depends on 1) The electric motor unit according to claim 1, comprising first electric connectors operatively connected to said first electric motor and second electric connectors operatively connected to said second electric motor for independently power supplying and operatively controlling said first electric motor and said second electric motor. ### Claim 6 (depends on 1) The electric motor unit according to claim 1, wherein said first drive shaft of said first electric motor and said second drive shaft of said second electric motor are operatively connected together, coaxially, through a rotating connection adapted to allow said drive shafts to rotate around said rotational axis independently. ### Claim 7 (depends on 6) The electric motor unit according to claim 6, wherein said first drive shaft of said first electric motor comprises an end section, at least partially hollow, positioned inside said casing, for housing at least one inner bearing. ### Claim 8 (depends on 7) The electric motor unit according to claim 7, wherein said at least one inner bearing comprises an outer annular element engaged with said partially hollow section and an inner annular element engaged with an end section of said second drive shaft of said second electric motor. ### Claim 9 (depends on 7) The electric motor unit according to claim 7, comprising an elastic ring coaxially interposed between the end section of said first drive shaft and said second drive shaft of said second electric motor, for dampening and dissipating, during use, possible vibrations between said drive shafts.