CN214256045U

CN214256045U - Axial flux motor and vehicle with same

Info

Publication number: CN214256045U
Application number: CN202120247393.1U
Authority: CN
Inventors: 卢家铮; 李义兵; 金连多; 何丽娜; 米义鹏; 王玲
Original assignee: Baoding R&D Branch of Honeycomb Transmission System Jiangsu Co Ltd
Current assignee: Baoding R&D Branch of Honeycomb Transmission System Jiangsu Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-09-21
Anticipated expiration: 2031-01-28

Abstract

The utility model discloses an axial flux motor and have its vehicle, axial flux motor includes: an accommodating cavity is arranged in the shell, and a cooling water channel is formed in the shell; the stator assembly is arranged in the accommodating cavity; the rotor disc is arranged in the accommodating cavity and positioned between the stator assembly and the shell, a first gap and a second gap are respectively formed between the two sides of the rotor disc in the axial direction and the shell and between the two sides of the rotor disc and the stator assembly, and a communication hole for communicating the first gap and the second gap is formed in the rotor disc; the motor shaft penetrates through the stator assembly and is connected with the rotor disc; the air guide piece is arranged on the rotor disc and protrudes out of the surface of the rotor disc so as to drive airflow to circularly flow in a cavity formed by the first gap, the third gap, the second gap and the communication hole. The rotor disc of the axial flux motor is provided with the air guide piece, the air guide piece can disturb air flow in the shell, and the air flow is enabled to be in contact with the shell, so that heat generated by the stator assembly is taken away by a water channel in the shell, and heat dissipation performance of the axial flux motor is improved.

Description

Axial flux motor and vehicle with same

Technical Field

The utility model belongs to the technical field of the motor and specifically relates to an axial magnetic flux motor and have its vehicle is related to.

Background

In the related art, the axial flux motor generally has a large power density, and the absolute value of the heating loss and the heating density of the stator are generally larger than those of a common built-in permanent magnet synchronous motor. A more efficient heat dissipation design is needed to fully develop its performance. The current axial flux motor uses a water cooling structure of a certain axial length on the outer diameter side of the stator assembly to cool the stator assembly. The final radial profile of the stator assembly is typically manufactured to relatively large assembly and manufacturing tolerances during manufacture. In order to fill up the tolerance of the outer diameter size of the formed stator assembly and reliably dissipate heat, a certain gap is required to be left between the stator assembly and the inner diameter surface of the water cooling structure, then heat-conducting glue is used for pouring and casting, and an air gap during filling is sealed, so that the stator is cooled on the single surface on one side of the outer diameter of the stator, the heat conductivity coefficient and the volume of the heat-conducting glue are often large, large heat transfer resistance is formed, and heat transfer of the water cooling structure is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an axial flux motor is provided with the air guide on this axial flux motor's the rotor dish, and the air guide can disturb the air current in the casing, makes air current and casing contact to make the water course in the casing take away the produced heat of stator module, improved axial flux motor's heat dispersion.

According to the utility model discloses an axial flux motor includes: the cooling device comprises a shell, a cooling water channel and a cooling water channel, wherein an accommodating cavity is formed in the shell; the stator assembly is arranged in the accommodating cavity; the rotor disc is arranged in the accommodating cavity and positioned between the stator assembly and the shell, a first gap and a second gap are respectively formed between the two sides of the rotor disc in the axial direction and the shell and between the two sides of the rotor disc and the stator assembly, a third gap communicated with the first gap and the second gap is formed between the radial outer periphery of the rotor disc and the shell, and a communication hole communicated with the first gap and the second gap is formed in the rotor disc; the motor shaft penetrates through the stator assembly and is connected with the rotor disc; the air guide piece is arranged on the rotor disc and protrudes out of the surface of the rotor disc so as to drive airflow to circularly flow in a cavity formed by the first gap, the third gap, the second gap and the communication hole.

According to the utility model discloses an axial flux motor is provided with the cooling water course in the casing, sets up the wind-guiding piece on the rotor dish simultaneously, and stator module's periphery can be through dispelling the heat with casing direct contact, and stator module's axial surface can flow and dispel the heat through carrying out the heat exchange between the casing through the air current, and the axial flux motor's of this application heat-sinking capability is strong, and the reliability is high.

According to the utility model discloses an embodiment, stator module includes: the stator comprises a first stator disc and a second stator disc, wherein the first stator disc and the second stator disc are arranged at intervals in the axial direction, and a plurality of winding mounting holes which are arranged at intervals in the circumferential direction are arranged on the first stator disc and the second stator disc in a one-to-one correspondence manner; first and second stator teeth configured in a one-to-one correspondence in plurality; the first stator teeth are arranged in the winding mounting holes in the first stator disc in a one-to-one corresponding mode, the second stator teeth are arranged in the winding mounting holes in the second stator disc in a one-to-one corresponding mode, and the windings are constructed in a plurality of modes and are wound on the corresponding first stator teeth and the corresponding second stator teeth; the stator inner ring is arranged between the first stator disc and the second stator disc and located on the radial inner sides of the plurality of windings, and a spoiler is arranged on the stator inner ring.

According to the utility model discloses an embodiment, casing internal surface is provided with along radial protrusion in encircleing hold the bulge in chamber, first stator dish with between the second stator dish respectively with the both sides of bulge axial are stopped to and fixed connection.

According to an embodiment of the present invention, the housing includes: an inner housing, wherein the inner housing defines the containing cavity and the inner surface of the inner housing is provided with the convex part; the outer shell is sleeved on the periphery of the inner shell and is arranged at intervals with at least part of the inner shell to limit the cooling water channel.

According to an embodiment of the utility model, be provided with a plurality of mounting holes that are suitable for the fastener to pass on the bulge, the cooling water course is constructed for circumference wave cooling water course in order to dodge the mounting hole.

According to the utility model discloses an embodiment, the casing still includes: the first end cover and the second end cover are respectively fixed with the outer shell to close the accommodating cavity; the rotor disks are configured in two and the first gap is provided between the first end cover and the second end cover, respectively.

According to the utility model discloses an embodiment, be provided with the embedment glue hole on at least one in the first end cover with the second end cover.

According to the utility model discloses an embodiment, first end cover with be provided with on the second end cover respectively be suitable for with motor shaft complex first bearing and second bearing, first bearing with at least one of second bearing is constructed for thrust bearing or double row angular contact ball bearing.

According to an embodiment of the present invention, the rotor disks are configured as a plurality of disks respectively connected to the motor shaft, the rotor disks are arranged at intervals in the axial direction of the motor shaft, and the stator assembly is provided between two adjacent rotor disks.

The vehicle according to the present invention is briefly described below.

According to the utility model discloses a be provided with the axial flux motor of above-mentioned embodiment on the vehicle, because according to the utility model discloses a be provided with the axial flux motor of above-mentioned embodiment on the vehicle, consequently the dynamic behavior of this vehicle is good, has improved the life and the reliability of vehicle, and has certain price advantage with low costs.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of an axial flux electric machine according to an embodiment of the present invention;

fig. 2 is a partial cross-sectional view of an axial-flux electric machine according to an embodiment of the present invention;

fig. 3 is a schematic diagram of the cooperation of a rotor disc, a motor shaft and a stator assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a rotor disk according to an embodiment of the invention;

fig. 5 is a schematic diagram of the cooperation of a rotor disc, a motor shaft and a stator assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a rotor disc according to an embodiment of the invention;

fig. 7 is a schematic structural view of a rotor disk according to another embodiment of the present invention;

fig. 8 is a schematic view of a stator assembly in accordance with the present invention mated to a housing;

fig. 9 is a schematic layout of a spoiler rib according to an embodiment of the present invention.

Reference numerals:

an axial-flux electric machine 1 is provided,

a housing 11, an inner housing 112, a protrusion 1121, a mounting hole 11211, an outer housing 113, a cooling water passage 1101, a spoiler 1102, a first end cap 114, a second end cap 115,

the stator assembly 12, the first stator disc 121, the second stator disc 122, the potting adhesive hole 1211, the first stator teeth 123, the second stator teeth 124, the winding 125, the insulating sleeve 126, the stator inner ring 127, the spoiler 1271,

the motor shaft 13 is provided with a plurality of bearings,

the air guide 14, the air guide rib 141, the first air guide rib 1401, the second air guide rib 1402, the rib group 1403, the turbulent flow part 1405,

the rotor disk 15, the inner circular portion 151, the connecting portion 152, the outer circular portion 153, the third air guide rib 154,

a first gap 101, a second gap 102, a third gap 103, a communication hole 104, and a permanent magnet 105.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

An axial flux electric machine 1 according to an embodiment of the present invention is described below with reference to fig. 1 to 9.

As shown in fig. 1, fig. 2 and fig. 5, the axial flux motor 1 according to the present invention includes a housing 11, a stator assembly 12, a rotor disc 15 and a motor shaft 13, wherein the stator assembly 12 is disposed in the housing 11, the rotor disc 15 is disposed in the housing 11 and located between the stator assembly 12 and the housing 11, a first gap 101 and a second gap 102 are respectively formed between two sides of the rotor disc 15 in the axial direction and the housing 11 and the stator assembly 12, a third gap 103 communicating the first gap 101 and the second gap 102 is formed between a radial outer periphery of the rotor disc 15 and the housing 11, a communication hole 104 communicating the first gap 101 and the second gap 102 is provided on the rotor disc 15, and the motor shaft 13 penetrates through the stator assembly 12 and is connected to the rotor disc 15.

The stator assembly 12 of the axial-flux electric machine 1 can generate a magnetic field in an axial direction, the rotor disc 15 is provided with permanent magnets 105, and the magnetic field on the stator assembly 12 is changed to drive the rotor disc 15 to rotate.

In the related art, the axial flux motor 1 generally has a large power density, and the absolute value of the stator heating loss and the heating density are generally larger than those of a common built-in permanent magnet synchronous motor. A more efficient heat dissipation design is needed to fully develop its performance. In the present axial flux motor 1, a water cooling structure having a certain axial length is used on the outer diameter side of the stator assembly 12 to cool the stator assembly. The final radial profile of the stator assembly 12 is typically manufactured to a greater tolerance for assembly and manufacturing. In order to fill up the tolerance of the outer diameter dimension of the stator assembly 12 after molding and reliably dissipate heat, a certain gap is required to be left between the stator assembly 12 and the inner diameter surface of the water cooling structure, then heat conducting glue is used for pouring and casting, and air gaps between the stator assembly and the water cooling structure are sealed and filled, so that the stator is cooled on the single surface of one side of the outer diameter of the stator, the heat conducting glue is small in heat conductivity coefficient and thick in radial volume, large heat transfer resistance is formed, and heat transfer of the water cooling structure is not facilitated.

In the present application, as shown in fig. 2 and 5, a first gap 101 is formed between one axial side of the rotor disk 15 and the housing 11, a second gap 102 is formed between the other axial side of the rotor disk 15 and the stator assembly 12, a third gap 103 is formed between a radially outer edge of the rotor disk 15 and the housing 11, the third gap 103 may communicate a radially outer side of the first gap 101 with a radially outer side of the second gap 102, a communication hole 104 is provided at a radially inner side of the rotor disk 15, and the communication hole 104 may communicate a radially inner side of the first gap 101 with a radially inner side of the third gap 103, so that a circulation air passage is formed inside the axial flux motor 1.

The air flow in the circulation air duct flowing through the second gap 102 may contact the stator assembly 12 to take away heat from the stator assembly 12, and flow to the first gap 101 and the third gap 103 through the communication holes 104 to exchange heat with the housing 11 to reduce the temperature of the stator assembly 12.

The wind guide part 14 is further arranged in the application, the wind guide part 14 is arranged on the rotor disc 15 and protrudes out of the surface of the rotor disc 15, the wind guide part 14 can rotate along with the rotation of the rotor disc 15, the wind guide part 14 can drive airflow in the axial flux motor 1 to flow, the flow velocity of the airflow among the first gap 101, the third gap 103, the second gap 102 and the communication hole 104 is improved, heat generated on the stator component 12 is more quickly dissipated to the shell 11, and the heat dissipation efficiency of the stator component 12 is improved.

According to the utility model discloses an axial flux motor 1, through set up intercommunicating pore 104 and wind-guiding piece 14 on rotor dish 15 for the inside air current of axial flux motor 1 has improved the velocity of flow in radial, with give off the produced heat of rotor and stator module to casing 11 fast, and carry out the heat exchange with the low temperature surface that has the water-cooling heat dissipation in the casing, improved the heat exchange efficiency between rotor subassembly and the casing 11, promoted axial flux motor 1's performance.

According to the utility model discloses an embodiment, wind guide 14 sets up in the axial at least one side of rotor disc 15, and wind guide 14 can set up in one side of rotor disc 15 towards stator module 12, is about to wind guide 14 sets up in second clearance 102, and setting up wind guide 14 in rotor disc 15 towards stator module 12 one side can make wind guide 14 directly disturb the air current on stator module 12 surface to improve the air current velocity of flowing through stator module 12 surface, in order to improve the radiating efficiency of wind guide 14 to stator module 12.

The air guide 14 may be disposed on a side of the rotor disc 15 facing the casing 11, and disposing the air guide 14 on a side of the rotor disc 15 facing the stator assembly 12 may enable the air guide 14 to directly disturb the airflow on the surface of the casing 11, so as to increase the flow velocity of the airflow flowing through the surface of the casing 11, so as to accelerate the heat exchange efficiency between the casing 11 and the airflow, and enable the heat to be rapidly transferred to the casing 11.

According to the utility model discloses an embodiment, wind-guiding 14 includes: the air guiding ribs 141 protrude from the surface of the rotor disc 15, the air guiding ribs 141 are multiple and are arranged at intervals in the circumferential direction of the rotor disc 15, and in the rotating process of the motor shaft 13, the rotor disc 15 drives the air guiding ribs 141 to rotate, so that the air guiding ribs 141 disturb the air flow in the first gap 101 and the second gap 102, the air pressure at each position in the housing 11 is changed, and the air flow circulates in the first gap 101, the third gap 103, the second gap 102 and the communication hole 104.

Further, the plurality of wind guiding ribs 141 are arranged at intervals in the axial direction of the rotor disk 15, each wind guiding rib 141 extends in a direction away from the rotation center of the rotor disk 15 and opposite to the rotation direction of the rotor disk 15, when the motor rotating shaft rotates in the first direction, the bending direction of the wind guiding rib 141 is bent in the second direction opposite to the first direction, and the wind guiding ribs 141 are configured to be bent in the direction opposite to the rotation direction of the rotor disk 15, so that the noise reduction effect of the flux motor can be improved.

As shown in fig. 9, in an embodiment of the present invention, the wind guiding rib 141 may be configured to be bent toward the same direction as the rotation direction of the rotor disc 15, so as to improve the disturbance effect of the wind guiding rib 141 on the air flow and improve the heat dissipation efficiency of the axial flux motor 1.

Further, each air guiding rib 141 is tangent to the circular arc at any position, and the radius of the circular arc tangent to the air guiding rib 141 in the direction gradually away from the rotation center of the rotor disk 15 is gradually reduced by the air guiding rib 141. The air guiding ribs 141 are constructed into a line shape of a continuous curve formed by a plurality of sections of circular arcs in a tangent mode, so that the separation of air flow in the radial centrifugal acceleration process can be reduced, and the flowing speed of the air flow is improved; meanwhile, the eddy current phenomenon at the radial outer end of the air guiding rib 141 can be effectively improved, and the noise generated by the axial flux motor 1 is reduced.

The points a-D shown in fig. 9 are all tangent points on the air guiding rib 141, where ρ a, ρ B, ρ C, and ρ D are tangent radii corresponding to the tangent points, a is a radial end of the air guiding rib, and ρ a, < ρ B, < ρ C, < ρ D.

As shown in fig. 4 and 5, according to the utility model discloses an embodiment, the radial outer terminal surface of wind guiding rib 141 is provided with in the radial convex vortex portion 1405, and through setting up vortex portion 1405 in the radial outer end of wind guiding rib 141, vortex portion 1405 can improve the linear velocity of the radial outer end of wind guiding rib 141, helps increasing the wind pressure of terminal air current, and vortex portion 1405 can form tiny a plurality of vortexes at the free end of wind guiding rib 141 to reduce wind and make an uproar.

In an embodiment of the present invention, the cross section of the spoiler 1405 may be a straight line extending perpendicular to the axial direction of the motor shaft 13.

In an embodiment of the present invention, the spoiler portion 1405 may be provided with a slot extending in the axial direction to configure the cross section of the spoiler portion 1405 into an a-shape or a V-shape.

In an embodiment of the present invention, the spoiler portion 1405 may be configured to gradually decrease in thickness in a direction away from the rotation center of the rotor disk 15 to form a single-sided oblique cutting angle on the spoiler portion 1405, thereby reducing (increasing the circulating airflow passing through) the vortex dimension at the end of the blade and achieving the noise reduction purpose.

As shown in fig. 5, according to an embodiment of the present invention, the dimension of the air guide ribs 141 in the axial direction gradually increases in a direction away from the rotation center of the rotor disk 15. The dimension of the wind guiding ribs 141 in the axial direction may be the thickness of the wind guiding ribs 141 in the axial direction of the rotor disk 15, or it is understood that the dimension of the wind guiding ribs 141 in the axial direction is the height of each wind guiding rib 141.

And the spoiler portion 1405 is disposed at the radial outer end of each air guiding rib 141, and the portion of the spoiler portion 1405 connected to the air guiding ribs 141 may be kept the same as the maximum height of the air guiding ribs 141.

In the process of rotating the rotor disc 15, the speed and the pressure of the air flow close to one side of the circle center of the rotor disc 15 are lower, and smaller blades are used, so that the friction loss is reduced, the motor efficiency is improved, the height of the radial outer end of the air guide rib 141 is higher than that of the radial inner end, the characteristic that the linear speed of the outer ring is higher is fully utilized, the pressurization effect on the air flow is increased, and the flowing speed of the air flow is improved.

As shown in fig. 6, according to an embodiment of the present invention, the wind guide 14 includes a first wind guiding rib 1401 and a second wind guiding rib 1402, the first wind guiding rib 1401 is configured to protrude from the surface of the rotor disc 15, and the first wind guiding ribs 1401 are plural and are arranged at intervals in the circumferential direction of the rotor disc 15; the second wind guiding ribs 1402 are also configured to protrude from the surface of the rotor disk 15, the second wind guiding ribs 1402 are multiple and are arranged at intervals in the circumferential direction of the rotor disk 15, each second wind guiding rib 1402 is disposed between two adjacent first wind guiding ribs 1401, and the radial outer ends of the first wind guiding ribs 1401 and the radial outer ends of the second wind guiding ribs 1402 are arranged in a staggered manner.

The radial inner ends of the first air guiding rib 1401 and the second air guiding rib 1402 may be located on a circle, the circle center of the circle is the center of the rotation center of the rotor disk 15, and the lengths of the first air guiding rib 1401 and the second air guiding rib 1402 are different, so that the radial outer ends of the first air guiding rib 1401 and the second air guiding rib 1402 are staggered with each other.

Through staggering the setting in length with the radial end of first wind-guiding muscle 1401 and second wind-guiding muscle 1402 to make rotor dish 15 can make the air current between the different wind-guiding muscle in the rotation process, can not reach the radial outer end of rotor dish 15 simultaneously, thereby avoid the produced noise stack of air current, can further reduce the produced noise of first wind-guiding muscle 1401 and second wind-guiding muscle 1402 in the rotation process, promote axial magnetic flux motor 1's practicality.

Simultaneously, stagger the setting in length with the radial end of first wind-guiding muscle 1401 and the radial end of second wind-guiding muscle 1402 to convenient vortex portion 1405 is processed out at the end of first wind-guiding muscle 1401 and second wind-guiding muscle 1402, increases the operating space of machining tool, reduces the processing degree of difficulty.

As shown in fig. 6 and 7, in a specific embodiment of the present invention, the wind guide 14 includes a plurality of rib groups 1403, the rib groups 1403 are configured to be a plurality of and arranged at intervals in sequence in the circumferential direction of the rotor disk 15, each rib group 1403 includes a plurality of first wind guide ribs 1401 and a plurality of second wind guide ribs 1402, the plurality of first wind guide ribs 1401 and the plurality of second wind guide ribs 1402 are arranged at intervals in sequence in the circumferential direction of the rotor disk 15, and the radial outer ends of the first wind guide ribs and the radial outer ends of the second wind guide ribs 1402 are arranged in a staggered manner.

Each rib group 1403 may be configured in a fan shape, a plurality of first air guiding ribs 1401 and a plurality of second air guiding ribs 1402 are provided in each rib group 1403, the plurality of first air guiding ribs 1401 may be sequentially arranged, the plurality of second air guiding ribs 1402 are sequentially arranged, the plurality of first air guiding ribs 1401 and the plurality of second air guiding ribs 1402 are arranged at equal intervals in a fan-shaped area occupied by the rib group 1403, and the plurality of rib groups 1403 are spaced apart from each other to surround the periphery of the rotor disk 15.

The distances between two adjacent first air guiding ribs 1401 or two adjacent second air guiding ribs 1402 or two adjacent first air guiding ribs 1401 and second air guiding ribs 1402 in one rib group 1403 are the same, the distances between two adjacent rib groups 1403 are also the same, but the distance between two adjacent rib groups 1403 is larger than the distance between two adjacent ribs in each rib group 1403.

In some embodiments of the present invention, for the longer one of the radial dimensions in the first wind guiding rib 1401 and the second wind guiding rib 1402 in the rotor disk 15, since the radial outer end protrudes out of the other wind guiding ribs 141, the turbulent portion 1405 can be more conveniently machined, and various shapes and layouts can be adopted, for example, the turbulent portion 1405 is machined to have a section of W, Y, U, O, A, D, F, H, L, V, N, M, etc., and the section is machined to have a design of wing shape, rectangle, triangle, circle, ellipse, hyperbola, high-order spline curve, spindle shape, cone shape, trapezoid shape, diamond shape, streamline shape, oval shape, or some combination thereof.

As shown in fig. 4, in an embodiment of the present invention, the rotor disc 15 includes an inner circle portion 151, a connecting portion 152 and an outer circle portion 153, an inner circumference edge of the inner circle portion 151 is fixed to the motor shaft 13, an inner circumference edge of the connecting portion 152 is connected to an outer circumference edge of the inner circle portion 151 and is provided with the communicating hole 104, an inner circumference edge of the outer circle portion 153 is connected to an outer circumference edge of the connecting portion 152 and is opposite to the stator assembly 12, the outer circle portion 153 and the inner circle portion 151 are arranged in an axially staggered manner, and the air guide 14 is disposed on the outer circle portion 153; the connecting portion 152 is provided with a third air guiding rib 154 extending in the axial direction.

The inner circle part 151 is used for fixing with the motor shaft 13, a motor shaft mounting hole used for matching with the motor shaft 13 is arranged on the inner circle part 151, and a fastener penetrates through the motor shaft mounting hole to fix the rotor disc 15 and the motor shaft 13; a connecting portion 152 provided on the outer periphery of the inner circular portion 151 and extending at least partially in the axial direction, and the communication hole 104 may penetrate the connecting portion 152 in the thickness direction to communicate with the inner end of the second gap 102 in the radial direction at the first gap 101, thereby ensuring that the air flow can circulate; the outer circular portion 153 is provided at a radially outer end of the connecting portion 152 and is spread out in a direction away from the rotation center of the rotor disk 15, and a permanent magnet 105 may be provided at a side of the connecting portion 152 facing the rotor assembly.

The inner circle part 151, the connecting part 152 and the outer circle part 153 are arranged in the rotor disc 15 to configure the cross section of the rotor disc 15 into a "Z" shape, so that a circulation cavity suitable for air flow circulation is formed between the rotor disc 15 and the shell 11 and between the rotor disc and the stator assembly 12, the flow rate of the air flow circulation is improved, and the heat dissipation effect of the axial flux motor 1 is improved.

As shown in fig. 3, further, a third air guiding rib 154 is disposed on the connecting portion 152, the third air guiding rib 154 may be disposed on a surface of the connecting portion 152 facing a rotation center of the rotor disk 15, and the third air guiding rib 154 may generate a certain negative pressure near a center of the rotor disk 15 along with the rotation of the rotor disk 15, so that the air flow can rapidly enter the third gap 103 from the second gap 102 through the communication hole 104. The circulation rate of the airflow is accelerated.

As shown in fig. 3 and 4, according to an embodiment of the present invention, the communication holes 104 are configured to be plural and arranged at intervals in the circumferential direction of the connecting portion 152, the third air guiding rib 154 is disposed between two adjacent communication holes 104, and by disposing the third air guiding rib 154 between two adjacent communication holes 104 at intervals, the air flow passing through the communication holes 104 can be further disturbed, and the flow rate of the air flow can be improved.

In some embodiments of the present invention, the communication hole 104 may be configured as a rectangular hole to increase the area of the communication hole 104 and increase the flow rate of the air flow. In other embodiments, the communication hole 104 may be configured as a circular hole, which may reduce the difficulty of machining the rotor disk 15 and the manufacturing cost.

According to the utility model discloses an embodiment, be provided with in casing 11 and hold the chamber, so that be used for holding stator module 12, rotor dish 15, motor shaft 13 and wind guide 14 etc, be formed with cooling water course 1101 in the casing 11, so that be used for cooling air current and stator module 12, stator module 12 sets up and is holding the intracavity, stator module 12's periphery wall can contact with the internal perisporium of casing 11, so that with the produced heat transfer of stator module 12 to casing 11 and further give off casing 11 accident through cooling water course 1101, in order to cool down stator module 12, thereby axial flux motor 1's radiating effect has been optimized.

Further, the wind guide 14 disposed on the rotor disc 15 can rotate synchronously with the rotor disc 15 to drive the airflow in the cavity of the housing 11, so as to further improve the heat dissipation efficiency of the stator assembly 12, and the airflow contacts the axial surface of the stator assembly 12 and passes through the housing 11 in the flowing process, so as to transfer the heat generated by the stator assembly 12 to the housing 11, so as to further improve the heat dissipation effect of the axial flux motor 1.

According to the utility model discloses an axial flux motor 1 is provided with cooling water course 1101 in casing 11, sets up wind-guiding piece 14 simultaneously on rotor dish 15, and stator module 12's periphery can dispel the heat through with casing 11 direct contact, and stator module 12's axial surface can dispel the heat through carrying out the heat exchange between air current flow and the casing 11, and the axial flux motor 1's of this application heat-sinking capability is strong, and the reliability is high.

As shown in fig. 1, according to one embodiment of the present invention, the stator assembly 12 includes: the stator comprises a first stator disc 121, a second stator disc 122, a first stator tooth 123, a second stator tooth 124, a winding 125 and a stator inner ring 127, wherein the first stator disc 121 and the second stator disc 122 are arranged at intervals in the axial direction, a plurality of winding mounting holes arranged at intervals in the circumferential direction are arranged on the first stator disc 121 and the second stator disc 122 in a one-to-one correspondence manner, the first stator tooth 123 and the second stator tooth 124 are constructed in a plurality of one-to-one correspondence manner, the first stator tooth 123 is arranged in the winding mounting hole on the first stator disc 121, and the second stator tooth 124 is arranged in the winding mounting hole on the second stator disc 122; the winding 125 is configured in a plurality and wound on the corresponding first stator tooth 123 and second stator tooth 124; as shown in fig. 8, the stator inner ring 127 is disposed between the first stator disc 121 and the second stator disc 122 and located radially inside the plurality of windings 125, and a spoiler 1271 is disposed on the stator inner ring 127 to increase a contact area between the stator assembly 12 and air and increase a heat exchange speed between the axial-flux motor 1 and the air.

Further, the outer periphery of the stator teeth is provided with an insulating sleeve 126, and the winding 125 is wound on the insulating sleeve 126 corresponding to the outer periphery of the stator teeth.

As shown in fig. 1, according to an embodiment of the present invention, the inner surface of the housing 11 is provided with a protrusion 1121 protruding radially from the surrounding accommodating cavity, and the first stator disc 121 and the second stator disc 122 are respectively abutted against and fixedly connected to two sides of the protrusion 1121 in the axial direction.

The first stator disc 121 and the second stator disc 122 are respectively fixedly connected with two axial sides of the protrusion 1121, the first stator disc 121 and the second stator disc 122 may be a framework structure of the stator assembly 12, the first stator disc 121 and the second stator disc 122 are provided with a plurality of windings 125, by fixing the first stator disc 121 and the second stator disc 122 with the protrusion 1121, the fixed connection between the stator assembly 12 and the housing 11 may be achieved, and the protrusion 1121 may contact with each component in the stator assembly 12, so that heat generated by the stator assembly 12 is transferred to the cooling water channel 1101 in the housing 11 through the protrusion 1121, so as to improve heat transfer efficiency.

According to an embodiment of the present invention, the housing 11 includes an inner housing 112 and an outer housing 113, the inner housing 112 defines an accommodating cavity therein, and the inner surface of the inner housing 112 is provided with the protrusion 1121; outer shell 113 is disposed around an outer periphery of inner shell 112 and spaced apart from at least a portion of inner shell 112 to define a cooling water channel 1101.

Through setting up outer casing 113 and inner casing 112 and making at least part of inner casing 112 and outer casing 113 separate in order to form cooling water course 1101, can reduce the degree of difficulty of arranging of cooling water course 1101, make things convenient for the processing of casing 11 structure, also guaranteed the leakproofness of cooling water course 1101, be provided with inlet channel and the exhalant canal with cooling water course 1101 intercommunication on outer casing 113 to be convenient for be connected cooling water course 1101 with outside water cooler system.

According to the utility model discloses an embodiment, be provided with a plurality of mounting holes 11211 that are suitable for the fastener to pass on the protrusion 1121, cooling water course 1101 constructs for circumference wave water course in order to dodge mounting hole 11211, circumference wave cooling water course 1101 can avoid the fixed connection department of motor stator and casing 11, with furthest's motor stator that closely laminates, and wave design can increase the heat transfer area of contact between cooling liquid and the motor stator in circumference wave cooling water course 1101, consequently, can make the heat-sinking capability and the life of motor obtain effectual improvement, and then make the security of vehicle also obtain the improvement.

The circumferential undulating cooling water channel 1101 is a cavity structure suitable for flowing of cooling liquid, and the circumferential undulating cooling water channel 1101 includes: protruding section and sunken section, protruding section are outside the radial protrusion in casing 11 in order to dodge mounting hole 11211, and sunken section is sunken towards the radial inboard of casing 11 to further press close to the internal surface of casing 11, make circumference wave cooling water course 1101 can be closer to stator module 12, thereby make the coolant liquid in the circumference wave cooling water course 1101 can be more rapid take away the heat, and then improved axial flux motor 1's radiating efficiency. This application can make the thickness of casing 11 reduce through setting up circumference wave cooling water course 1101 for axial flux motor 1's casing 11 structure is compacter, has guaranteed axial flux motor 1's radiating effect simultaneously.

Turbulence ribs 1102 which are wavy in the axial direction are arranged in the circumferential wavy cooling water channel 1101. The wave vortex ribs 1102 can disturb vortex generated inside the circumferential wave cooling water channel 1101, so that cooling liquid inside the circumferential wave cooling water channel 1101 can flow orderly and disorderly, the convection heat transfer effect is improved, heat dissipated by the motor stator can be taken away more timely and effectively, and the heat exchange efficiency is effectively improved.

Further, the wavy turbulence ribs 1102 can further increase the heat exchange area between the cooling liquid in the circumferential wavy cooling water channel 1101 and the shell 11, so that the heat exchange efficiency of the motor stator is further improved.

According to an embodiment of the present invention, the casing 11 further comprises a first end cap 114 and a second end cap 115, the first end cap 114 and the second end cap 115 are respectively fixed with the outer casing 113 to close the accommodation cavity, the rotor disc 15 is configured in two and is provided with a first gap 101 between the first end cap 114 and the second end cap 115 respectively. The first end cap 114 and the second end cap 115 can seal the accommodation space in the housing 11 and protect the rotor disc 15 and the stator assembly 12 inside the housing 11.

At least one of the first end cap 114 and the second end cap 115 is provided with a potting adhesive hole 1211, after the first end cap 114 and the second end cap 115 are fixed to the protrusion 1121, the stator assembly 12 is disposed between the first end cap 114 and the second end cap 115, and heat-conducting adhesive is poured into a space defined by the first end cap 114, the second end cap 115 and the protrusion 1121 through the potting adhesive hole 1211, so that the space between the winding 125 and the protrusion 1121 is filled, heat generated by the winding 125 is transferred to the housing 11 through the heat-conducting adhesive, and the heat-conducting efficiency of the axial flux motor 1 is improved.

According to the utility model discloses an embodiment, be provided with respectively on first end cover 114 and the second end cover 115 and be suitable for with motor shaft 13 complex first bearing and second bearing, at least one in first bearing and the second bearing is constructed for thrust bearing or double row angular contact bearing, motor shaft 13 in the axial flux motor 1 can produce certain axial force, consequently, construct one in first bearing and the second bearing for thrust bearing or double row angular contact bearing, can make the bearing can bear axial load, improve the stability of motor shaft 13, the reliability of axial flux motor 1 has been prolonged.

According to the utility model discloses an embodiment, rotor disc 15 constructs a plurality ofly of being connected with motor shaft 13 respectively, rotor disc 15 is interval arrangement in motor shaft 13's the axial, be provided with stator module 12 between two adjacent rotor discs 15, all be provided with permanent magnet 105 on every rotor disc 15, axial flux motor 1 according to this application can provide the torque for rotor disc 15's rotation through setting up a plurality of stator module 12, in order to improve axial flux motor 1's performance, and all can set up wind guide 14 on every rotor disc 15, in order to guarantee the velocity of air current flow in axial flux motor 1, improve axial flux motor 1's radiating effect.

A plurality of cooling water channels 1101 and protrusions 1121 may be provided on the housing 11, each protrusion 1121 may be provided corresponding to a corresponding cooling water channel 1101, one protrusion 1121 may be fixed to a corresponding stator assembly 12, and the cooling water channel 1101 corresponding to the protrusion 1121 may dissipate heat to the corresponding stator assembly 12, thereby ensuring a heat dissipation effect of each stator assembly 12.

The vehicle according to the present invention is briefly described below.

According to the utility model discloses a be provided with the axial flux motor 1 of above-mentioned embodiment on the vehicle, because according to the utility model discloses a be provided with the axial flux motor 1 of above-mentioned embodiment on the vehicle, consequently the dynamic behavior of this vehicle is good, has improved the life and the reliability of vehicle, and has certain price advantage with low costs.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An axial flux motor, comprising:

the cooling device comprises a shell (11), wherein an accommodating cavity is formed in the shell (11), and a cooling water channel (1101) is formed in the shell (11);

a stator assembly (12), the stator assembly (12) disposed within the containment cavity;

a rotor disc (15), wherein the rotor disc (15) is arranged in the accommodating cavity and located between the stator assembly (12) and the shell (11), a first gap (101) and a second gap (102) are respectively formed between the two sides of the rotor disc (15) in the axial direction and the shell (11) and the stator assembly (12), a third gap (103) communicated with the first gap (101) and the second gap (102) is formed between the radial outer periphery of the rotor disc (15) and the shell (11), and a communication hole (104) communicated with the first gap (101) and the second gap (102) is formed in the rotor disc (15);

the motor shaft (13), the said motor shaft (13) is worn and set up the said stator pack (12) and couples to said rotor disc (15);

the air guide piece (14) is arranged on the rotor disc (15) and protrudes out of the surface of the rotor disc (15) so as to drive airflow to circularly flow in a cavity formed by the first gap (101), the third gap (103), the second gap (102) and the communication hole (104).

2. The axial-flux electric machine of claim 1, wherein the stator assembly (12) includes:

a first stator disc (121) and a second stator disc (122), wherein the first stator disc (121) and the second stator disc (122) are arranged at intervals in the axial direction, and a plurality of winding (125) mounting holes (11211) which are arranged at intervals in the circumferential direction are arranged on the first stator disc (121) and the second stator disc (122) in a one-to-one correspondence manner;

a first stator tooth (123) and a second stator tooth (124), the first stator tooth (123) and the second stator tooth (124) being configured in a plurality in one-to-one correspondence; wherein the first stator teeth (123) are arranged in the winding (125) mounting holes (11211) on the first stator disc (121) in a one-to-one correspondence, the second stator teeth (124) are arranged in the winding (125) mounting holes (11211) on the second stator disc (122) in a one-to-one correspondence,

a winding (125), wherein the winding (125) is configured to be a plurality of windings and is wound on the corresponding first stator tooth (123) and the second stator tooth (124);

a stator inner ring (127), the stator inner ring (127) being disposed between the first stator disk (121) and the second stator disk (122) and being located radially inward of the plurality of windings (125), the stator inner ring (127) being provided with a spoiler (1271).

3. The axial flux electric machine according to claim 2, wherein the inner surface of the housing (11) is provided with a protrusion (1121) protruding radially from the housing surrounding the receiving cavity, and the first stator disc (121) and the second stator disc (122) are respectively abutted against and fixedly connected to two sides of the protrusion (1121) in the axial direction.

4. Axial flux machine according to claim 3, wherein the housing (11) comprises:

an inner housing (112), the inner housing (112) defining the receiving cavity therein and an inner surface of the inner housing (112) being provided with the protrusion (1121);

the outer shell (113) is sleeved on the periphery of the inner shell (112) and is arranged at intervals with at least part of the inner shell (112) to limit the cooling water channel (1101).

5. The axial flux electric machine according to claim 4, wherein the projection (1121) is provided with a plurality of mounting holes (11211) adapted for fasteners to pass through, the cooling water channel (1101) being configured as a circumferential undulating cooling water channel (1101) to avoid the mounting holes (11211).

6. An axial-flux electrical machine according to claim 4, wherein the housing (11) further comprises:

a first end cap (114) and a second end cap (115), the first end cap (114) and the second end cap (115) being respectively fixed with the outer housing (113) to close the accommodation chamber;

the rotor disks (15) are configured in two and the first gap (101) is arranged between the first end cover (114) and the second end cover (115).

7. The axial-flux electric machine of claim 6, wherein at least one of the first end cap (114) and the second end cap (115) has a potting compound aperture (1211) disposed thereon.

8. Axial flux machine according to claim 6, wherein the first end cover (114) and the second end cover (115) are provided with a first bearing and a second bearing, respectively, adapted to cooperate with the motor shaft (13), at least one of the first bearing and the second bearing being configured as a thrust bearing or as a double row angular contact ball bearing.

9. The axial flux machine according to any one of claims 1-8, wherein the rotor discs (15) are configured in plurality to be respectively coupled to the motor shaft (13), the rotor discs (15) are arranged at intervals in an axial direction of the motor shaft (13), and the stator assembly (12) is provided between adjacent two of the rotor discs (15).

10. A vehicle comprising an axial-flux electric machine as claimed in any one of claims 1-9.