Axial flux motor, electric device, and vehicle
An axial flux motor, an electric device, and a vehicle are provided. The axial flux motor includes a housing defining an accommodation space, a stator assembly, a rotor assembly, and a partition assembly. The stator assembly and the rotor assembly are arranged in the accommodation space in an axial direction of the axial flux motor. The partition assembly includes a partition body arranged between the stator assembly and the rotor assembly. The housing cooperates with the partition body to form a cooling space for accommodating a coolant and the stator assembly, and the coolant in the cooling space is in direct contact with the stator assembly. With the above implementation, the partition body is disposed between the stator assembly and the rotor assembly, such that an inner space of the housing is reasonably utilized and thus the structure of the axial flux motor is more compact.
1 . An axial flux motor, comprising:
a housing defining an accommodation space;
a stator assembly and a rotor assembly that are arranged in the accommodation space in an axial direction of the axial flux motor; and
a partition assembly comprising a partition body, the partition body being arranged between the stator assembly and the rotor assembly,
wherein the housing cooperates with the partition body to form a cooling space for accommodating a coolant and the stator assembly, the coolant in the cooling space being in direct contact with the stator assembly;
wherein the partition assembly further comprises a reinforcement member of a cylindrical shape, the reinforcement member is supported at a side of the partition body facing away from the stator assembly, the rotor assembly is disposed inside the reinforcement member; and
wherein a flow return hole is formed at the reinforcement member, a coolant permeated into the partition assembly from the cooling space is discharged to an outer space of the partition assembly through the flow return hole.
2 . The axial flux motor according to claim 1 , wherein
the housing comprises an end plate portion, the end plate portion having an inner end surface arranged towards a side of the stator assembly facing away from the rotor assembly; and
the inner end surface of the end plate portion is spaced apart from the partition body in the axial direction to define two side boundaries of the cooling space in the axial direction.
3 . The axial flux motor according to claim 1 , wherein
the housing comprises two cylindrical portions arranged in a sleeved manner in a radial direction of the axial flux motor, the two cylindrical portions being sealingly engaged with the partition body, respectively; and
the cooling space is of a ring shape.
4 . The axial flux motor according to claim 3 , wherein
the two cylindrical portions comprise a first cylindrical portion and a second cylindrical portion provided around the first cylindrical portion, the first cylindrical portion and the second cylindrical portion extending towards the stator assembly, and a rotary shaft of the rotor assembly passing through the first cylindrical portion; and
the partition body comprises an inner ring matching portion and an outer ring matching portion provided around the inner ring matching portion, wherein the inner ring matching portion is sealingly engaged with the first cylindrical portion, and wherein the outer ring matching portion is sealingly engaged with the second cylindrical portion.
5 . The axial flux motor according to claim 4 , wherein
the partition body is embedded inside the second cylindrical portion, a sealing engagement being formed between an outer peripheral surface of the outer ring matching portion and an inner peripheral surface of the second cylindrical portion; and/or
the inner ring matching portion is provided with a third cylindrical portion, the third cylindrical portion and the first cylindrical portion being connected to each other in an insertion manner to form a sealing engagement between the third cylindrical portion and the first cylindrical portion.
6 . The axial flux motor according to claim 4 , wherein the inner ring matching portion and/or the outer ring matching portion are sealingly engaged with the stator assembly.
7 . The axial flux motor according to claim 1 , wherein
the stator assembly comprises a stator iron core and a coil wound around the stator iron core, the stator iron core having a plurality of stator slots, and the coil being embedded in the plurality of stator slots; and
the partition body comprises a plurality of embedded ribs, the plurality of embedded ribs being positioned in one-to-one correspondence with the plurality of stator slots, and each of the plurality of embedded ribs being embedded in a corresponding one of the plurality of stator slots.
8 . The axial flux motor according to claim 7 , wherein
the housing comprises a first cylindrical portion and a second cylindrical portion provided around the first cylindrical portion, the first cylindrical portion and the second cylindrical portion extending towards the stator assembly, and a rotary shaft of the rotor assembly passing through the first cylindrical portion;
the partition body comprises an inner ring matching portion and an outer ring matching portion provided around the inner ring matching portion, the inner ring matching portion being sealingly engaged with the first cylindrical portion, and the outer ring matching portion being sealingly engaged with the second cylindrical portion;
the plurality of stator slots and the plurality of embedded ribs are radially spread with respect to the axial direction; and
the plurality of embedded ribs is connected to the inner ring matching portion and/or the outer ring matching portion, respectively.
9 . The axial flux motor according to claim 1 , wherein the partition assembly comprises a reinforcement member of a cylindrical shape, the reinforcement member being supported at a side of the partition body facing away from the stator assembly, and the rotor assembly being disposed within the reinforcement member.
10 . The axial flux motor according to claim 9 , wherein the reinforcement member is engaged with the housing.
11 . The axial flux motor according to claim 1 , wherein the partition assembly has a plurality of pressure relief holes formed at intervals in a circumferential direction of the axial flux motor.
12 . The axial flux motor according to claim 11 , wherein
the rotor assembly is spaced apart from the partition body in the axial direction;
an air gap is formed between the rotor assembly and the partition body; and
the air gap is in communication with an outer space of the partition assembly through the plurality of pressure relief holes.
13 . The axial flux motor according to claim 1 , wherein
the reinforcement member further has a plurality of pressure relief holes, the plurality of pressure relief holes being arranged at intervals at an edge of the reinforcement member facing towards the partition body in a circumferential direction of the axial flux motor; and
the flow return hole is centrally located with respect to edges of the reinforcement member at two sides in the axial direction.
14 . The axial flux motor according to claim 1 , wherein
the stator assembly comprises a stator iron core of a ring shape and a coil wound around the stator iron core, the coil protruding from two opposite ring side surfaces of the stator iron core in a radial direction of the axial flux motor to form an inner ring coil portion and an outer ring coil portion, the inner ring coil portion and/or the outer ring coil portion being located in the cooling space, and the coolant in the cooling space being in direct contact with the inner ring coil portion and/or the outer ring coil portion.
15 . The axial flux motor according to claim 1 , wherein
the housing comprises an end plate portion having an inner end surface arranged towards a side of the stator assembly facing away from the rotor assembly;
a cooling channel is formed at the inner end surface of the end plate portion, a side of the partition body facing towards the end plate portion, and/or the stator assembly; and
the coolant in the cooling space flows along the cooling channel.
16 . An electric device, comprising the axial flux motor according to claim 1 .
17 . A vehicle, comprising the axial flux motor according to claim 1 .