Axial flux motors and vehicles

Abstract

The present disclosure relates to an axial flux motor and a vehicle, wherein the axial flux motor comprises a housing, a stator and a rotor, wherein the housing is provided with a coolant inlet and a coolant outlet; the stator and the rotor are both arranged in the housing; wherein the stator comprises a stator core and a stator winding, wherein the stator winding is wound around the stator core, wherein the stator core is provided with a radial channel extending in the radial direction of the stator, wherein a first cooling cavity is formed between the outer circumference of the stator core and the housing, wherein the coolant inlet and the coolant outlet are both connected to the first cooling cavity, wherein a second cooling cavity is formed between the inner circumference of the stator core and the housing, wherein the second cooling cavity is connected to the first cooling cavity through the radial channel. The axial flux motor disclosed in the present disclosure can improve the overall performance of the axial flux motor.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to an axial flux motor and a vehicle. Background Art

[0002] Axial flux motors, also known as disc motors, have a poor cooling effect in related technologies, resulting in poor overall performance of the axial flux motors. Summary of the invention

[0003] The present disclosure provides an axial flux motor to improve the overall performance of the axial flux motor.

[0004] The axial flux motor disclosed in the present invention comprises a shell, a stator and a rotor, wherein the shell is provided with a coolant inlet and a coolant outlet; the stator and the rotor are both arranged in the shell; wherein the stator comprises a stator core and a stator winding, wherein the stator winding is wound around the stator core, the stator core is provided with a radial channel extending in the radial direction of the stator, a first cooling cavity is formed between the outer circumferential surface of the stator core and the shell, the coolant inlet and the coolant outlet are both communicated with the first cooling cavity, a second cooling cavity is formed between the inner circumferential surface of the stator core and the shell, and the first cooling cavity and the second cooling cavity are both communicated with the radial channel.

[0005] Optionally, there are multiple radial channels, and the multiple radial channels are arranged at intervals along the circumference of the stator; a part of the radial channels are connected to the coolant inlet, and another part of the radial channels are connected to the coolant outlet.

[0006] Optionally, the radial channel is a radial through hole.

[0007] Optionally, there are multiple radial channels, which are arranged at intervals along the circumference of the stator, wherein a portion of the radial channels are first channels and another portion of the radial channels are second channels; the second cooling cavity is connected to the first cooling cavity through the first channel.

[0008] Optionally, the axial flux motor further includes a fixing ring and a connecting piece, wherein the fixing ring is arranged inside the stator core, the connecting piece passes through the second channel, the inner end of the connecting piece is connected to the fixing ring, and the outer end of the connecting piece is connected to the shell.

[0009] Optionally, the second channel is a radial through hole, and the connecting member is positioned and matched with the second channel along the axial direction of the stator.

[0010] Optionally, a cross-sectional area of ​​the second channel is greater than a cross-sectional area of ​​the first channel.

[0011] Optionally, there are plural first channels and plural second channels, and at least one first channel is provided between two adjacent second channels.

[0012] Optionally, the fixing ring includes a ring body and a flange, the flange is arranged on the outer circumferential surface of the ring body, the ring body divides the second cooling chamber into a first chamber and a second chamber, at least one of the first chamber and the second chamber is connected to the radial channel, the flange is fixedly connected to the inner circumferential surface of the stator core, the flange is provided with a flow channel, and the first chamber is connected to the second chamber through the flow channel.

[0013] Optionally, a recessed groove is provided on the inner peripheral wall of the shell, and the outer end of the connecting piece is attached to and connected to the recessed groove.

[0014] Optionally, the stator core is provided with winding slots, the stator winding is wound in the winding slots, and the radial channels and the winding slots are arranged at intervals along the axial direction of the stator.

[0015] Optionally, two groups of winding slots are provided, and the two groups of winding slots are respectively provided on both axial sides of the stator, the radial channel is provided between the two groups of winding slots, and the stator winding is provided in each winding slot.

[0016] Optionally, a projection of the radial channel in the axial direction of the stator covers at least a portion of the winding slot.

[0017] Optionally, the coolant inlet and the coolant outlet are arranged opposite to each other in a radial direction of the stator.

[0018] Optionally, the stator winding includes a coil winding, which is wound around the stator core, and the coil winding includes an outer ring body and an inner ring body, and the inner ring body is nested in the outer ring body; the stator includes a bus, one end of the outer ring body is electrically connected to the bus, the other end of the outer ring body is electrically connected to one end of the inner ring body, and the other end of the inner ring body is electrically connected to the bus.

[0019] Optionally, one end of the outer ring body is welded to one end of the inner ring body.

[0020] Optionally, the outer ring body includes an outer ring body, a first outer ring segment and a second outer ring segment, and the two ends of the outer ring body are respectively arranged at the first outer ring segment and the second outer ring segment; the inner ring body includes an inner ring body, a first inner ring segment and a second inner ring segment, and the two ends of the inner ring body are respectively arranged at the first inner ring segment and the second inner ring segment; the first outer ring segment is electrically connected to the bus, the first inner ring segment is electrically connected to the bus, and the second outer ring segment is electrically connected to the second inner ring segment.

[0021] Optionally, the second outer ring segment and the second inner ring segment are arranged on the same side of the outer ring body in the axial direction of the stator; the second outer ring segment and the second inner ring segment are arranged on the same side of the inner ring body in the axial direction of the stator.

[0022] Optionally, the first outer ring segment and the second outer ring segment are respectively arranged on opposite sides of the outer ring body in the axial direction of the stator; the first inner ring segment and the second inner ring segment are respectively arranged on opposite sides of the inner ring body in the axial direction of the stator.

[0023] Optionally, the first outer ring segment and the first inner ring segment are arranged on the same side of the outer ring body in the axial direction of the stator, and the first outer ring segment and the first inner ring segment are arranged on the same side of the inner ring body in the axial direction of the stator.

[0024] Optionally, the coil windings are provided with two groups, and the two groups of coil windings are arranged at intervals along the axial direction of the stator; the stator includes an outgoing wire row, the bus bar is electrically connected to the outgoing wire row, and the outgoing wire row is arranged between the two groups of coil windings in the axial direction of the stator.

[0025] Optionally, two groups of busbars are provided, and the two groups of busbars are arranged between the two groups of coil windings in the axial direction of the stator.

[0026] Optionally, the rotor includes a rotor disk and a magnetic steel, the rotor disk includes a first bracket and a second bracket, the second bracket is arranged on one side of the first bracket in the axial direction of the stator and is connected to the first bracket, the first bracket is provided with a first clamping portion, and the second bracket is provided with a second clamping portion; the magnetic steel is clamped between the first clamping portion and the second clamping portion in the axial direction of the stator.

[0027] Optionally, the first bracket is provided with a slot, the notch of which faces radially outward of the rotor, and the second bracket is provided with a clamping protrusion, which is arranged in the slot.

[0028] Optionally, the size of the slot in the circumferential direction of the stator is larger than the size of the engaging protrusion in the circumferential direction of the stator; the first bracket is provided with a mounting groove, the mounting groove is connected to the slot, and the mounting groove allows the engaging protrusion to pass through along the radial direction of the rotor.

[0029] Optionally, the clamping groove is annular, the number of the mounting grooves and the clamping protrusions are both multiple, the multiple mounting grooves are arranged at intervals along the circumference of the stator, the mounting grooves and the clamping protrusions correspond one-to-one, and the mounting groove allows the corresponding clamping protrusion to pass through along the radial direction of the rotor.

[0030] Optionally, the first bracket includes a first ring body and a plurality of first clamping strips, the plurality of first clamping strips are arranged at intervals along the circumference of the first ring body, and the first clamping portion is provided on the first clamping strip; the second bracket includes a second ring body and a plurality of second clamping strips, the plurality of second clamping strips are arranged at intervals along the circumference of the second ring body, the second ring body is connected to the first ring body, and the second clamping portion is provided on the second clamping strip.

[0031] Optionally, the first clamping strip is provided with a limiting portion, and the limiting portion abuts against the magnetic steel along the circumferential direction of the stator.

[0032] Optionally, the first clamping bars and the second clamping bars are arranged alternately and spaced apart along the circumference of the stator.

[0033] Optionally, the magnetic steel is provided with a limiting groove, and the second clamping strip is arranged in the limiting groove.

[0034] The vehicle of the disclosed embodiment includes the axial flux motor described in any one of the above items.

[0035] When the axial flux motor disclosed in the present invention is in use, the coolant can enter the first cooling cavity from the coolant inlet of the housing. Afterwards, a portion of the coolant in the first cooling cavity flows along the outer ring of the stator core under the action of gravity, realizing cooling and heat dissipation of the outer side of the stator core and finally flowing out from the coolant outlet; another portion of the coolant in the first cooling cavity enters the second cooling cavity through the radial channel, realizing cooling and heat dissipation of the inner side of the stator core and the stator winding, and finally flowing out from the coolant outlet through the radial channel, forming a complete cooling circuit, improving the cooling and heat dissipation of the stator, and thus improving the overall performance of the axial flux motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional diagram of an axial flux motor according to an embodiment of the present disclosure.

[0037] Figure 2 It is a stereoscopic diagram of the axial flux motor from another perspective of an embodiment of the present disclosure.

[0038] Figure 3 is a cross-sectional view of an axial flux motor according to an embodiment of the present disclosure.

[0039] Figure 4 Detailed description of the invention Figure 1 is an exploded view of an axial flux motor according to an embodiment of the present invention.

[0040] Figure 5 It is a three-dimensional diagram of a stator core in an axial flux motor according to an embodiment of the present disclosure.

[0041] Figure 6 4 is a cross-sectional view of a stator core in an axial flux motor according to an embodiment of the present disclosure.

[0042] Figure 7 FIG. 1 is a flow path diagram of the coolant in an axial flux motor according to an embodiment of the present disclosure.

[0043] Figure 8 Detailed description of the invention is provided in the figure.

[0044] Fig. 9 This is a schematic structural diagram of a stator assembly in an axial flux motor according to an embodiment of the present disclosure, with the first pressure plate hidden.

[0045] Fig.10 yes Fig. 9 Enlarged view of point A in the middle.

[0046] Fig.11 This is a schematic structural diagram of a stator assembly in an axial flux motor according to an embodiment of the present disclosure, with the first pressure plate and the fixing ring hidden.

[0047] Fig.12 It is a schematic diagram of the assembly structure of the stator and the connecting parts in the axial flux motor according to an embodiment of the present disclosure.

[0048] Fig.13 FIG. 4 is an exploded view of a stator in an axial flux motor according to an embodiment of the present disclosure.

[0049] Fig.14 It is a schematic structural diagram of the first coil in the axial flux motor according to an embodiment of the present disclosure.

[0050] Fig.15 FIG. 4 is an exploded view of a first coil in an axial flux motor according to an embodiment of the present disclosure.

[0051] Fig.16 It is a schematic diagram of the structure of the second coil in the axial flux motor according to an embodiment of the present disclosure.

[0052] Fig.17 Detailed description of the invention is provided in detail.

[0053] Fig.18 1 is a perspective view of a rotor in an axial flux motor according to an embodiment of the present disclosure.

[0054] Fig.19 It is a stereoscopic diagram of the rotor in the axial flux motor according to an embodiment of the present disclosure from another perspective.

[0055] Fig. 20 FIG. 4 is an exploded view of a rotor in an axial flux motor according to an embodiment of the present disclosure.

[0056] Fig.21 It is a front view of a rotor in an axial flux motor according to an embodiment of the present disclosure.

[0057] Fig. 22 yes Fig.21 BB direction view.

[0058] Fig.23 It is a stereoscopic view of a first bracket in an axial flux motor according to an embodiment of the present disclosure.

[0059] Fig.24 It is a stereoscopic view from another perspective of the first bracket in the axial flux motor according to an embodiment of the present disclosure.

[0060] Fig.25 It is a three-dimensional diagram of a second bracket in an axial flux motor according to an embodiment of the present disclosure.

[0061] Fig.26 It is a three-dimensional diagram of magnetic steel in an axial flux motor according to an embodiment of the present disclosure.

[0062] Reference numerals:

[0063] 100. Axial flux motor;

[0064] 1. Shell; 11. Coolant inlet; 12. Coolant outlet; 101. First end cover; 102. Second end cover; 103. Shell body; 1031. Sink;

[0065] 2. stator; 21. stator core; 211. radial channel; 2111. first channel; 2112. second channel; 212. winding slot; 22. stator winding; 201. first cooling cavity; 202. second cooling cavity; 221. coil winding; 2211. first coil winding; 2212. second coil winding; 222. outer ring body; 2221. outer ring body; 2222. first outer ring segment; 2223. second outer ring segment; 223. inner ring body; 2231. inner ring body; 2232. first inner ring segment; 2233. second inner ring segment; 23. busbar; 25. outlet row; 26. first pressing plate; 27. second pressing plate;

[0066] 3. rotor; 31. rotor disk; 311. first bracket; 3111. first ring body; 31111. clamping groove; 31112. mounting groove; 3112. first clamping strip; 31121. first clamping part; 31122. limiting part; 31123. first connecting hole; 312. second bracket; 3121. second ring body; 31211. clamping protrusion; 31212. second connecting hole; 3122. second clamping strip; 31221. second clamping part; 32. magnetic steel; 321. first limiting surface; 322. second limiting surface; 323. limiting groove; 33. snap ring; 34. rivet; 301. first rotor; 302. second rotor;

[0067] 4. fixing ring; 41. ring body; 42. flange; 421. flow passage;

[0068] 5. Connectors;

[0069] 6. Motor shaft;

[0070] 71. first bearing; 72. second bearing;

[0071] 8. Rotary stator;

[0072] 9. Rotary cover plate;

[0073] 10. Terminal block. DETAILED DESCRIPTION

[0074] Reference below Figures 1 to 26 , describes the embodiments of the present disclosure in detail, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, but should not be understood as limiting the present disclosure.

[0075] like Figures 1 to 7 As shown, the axial flux motor 100 of the embodiment of the present disclosure includes a housing 1, a stator 2 and a rotor 3. The housing 1 is provided with a coolant inlet 11 and a coolant outlet 12. The stator 2 and the rotor 3 are both arranged in the housing 1. The stator 2 includes a stator core 21 and a stator winding 22. The stator winding 22 is wound on the stator core 21. The stator core 21 is provided with a radial channel 211 extending in the radial direction of the stator 2. The outer circumference of the stator core 21 and the housing 1 form a first cooling cavity 201. The coolant inlet 11 and the coolant outlet 12 are both connected to the first cooling cavity 201. The inner circumference of the stator core 21 and the housing 1 form a second cooling cavity 202. The first cooling cavity 201 and the second cooling cavity 202 are both connected to the radial channel 211.

[0076] like Figure 7 As shown, when the axial flux motor 100 of the embodiment of the present disclosure is in use, the coolant can enter the first cooling cavity 201 from the coolant inlet 11 of the housing 1. Afterwards, a portion of the coolant in the first cooling cavity 201 flows along the outer ring of the stator core 21 under the action of gravity, realizes cooling and heat dissipation of the outer side of the stator core 21, and finally flows out from the coolant outlet 12; another portion of the coolant in the first cooling cavity 201 enters the second cooling cavity 202 through the radial channel 211, realizes cooling and heat dissipation of the inner side of the stator core 21 and the stator winding 22, and finally flows out from the coolant outlet 12 through the radial channel 211, forming a complete cooling circuit, improving the cooling and heat dissipation of the stator 2, and thus improving the overall performance of the axial flux motor 100.

[0077] The coolant may be cooling oil, which can not only cool and dissipate the stator 2 but also lubricate the internal components of the axial flux motor 100 .

[0078] like Figure 3 and Figure 4 As shown, the housing 1 includes a first end cover 101, a second end cover 102 and a housing body 103. The first end cover 101 and the second end cover 102 are arranged on opposite sides of the housing body 103 in the axial direction of the stator 2. The first end cover 101, the second end cover 102 and the housing body 103 form a closed installation cavity, and the stator 2 and the rotor 3 are both arranged in the installation cavity. The first end cover 101, the second end cover 102 and the housing body 103 can be connected with bolts.

[0079] In some embodiments, there are multiple radial channels 211, which are arranged at intervals along the circumference of the stator 2. Some of the radial channels 211 are connected to the coolant inlet 11, and another part of the radial channels 211 is connected to the coolant outlet 12.

[0080] By setting the number of radial channels 211 to be multiple so that the coolant inlet 11 and the coolant outlet 12 are connected to different radial channels 211 , mixing of the coolant flowing into the first cooling cavity 201 and the coolant flowing out of the first cooling cavity 201 can be avoided.

[0081] On the one hand, since the temperature of the coolant flowing into the first cooling cavity 201 is relatively low, the temperature of the coolant flowing out of the first cooling cavity 201 is relatively high, thereby improving the cooling and heat dissipation effect of the stator 2, and further improving the overall performance of the axial flux motor 100; on the other hand, it is possible to avoid the formation of a flow dead zone in the first cooling cavity 201, thereby improving the cooling and heat dissipation effect of the stator 2, and further improving the overall performance of the axial flux motor 100.

[0082] Alternatively, if Figure 5 As shown, the radial channel 211 is a radial through hole.

[0083] For example, the radial channel 211 may be at least one of a circular hole, a square hole, and a rectangular hole.

[0084] By configuring the radial channel 211 as a radial through hole, it is helpful to improve the structural strength of the stator core 21 , thereby improving the reliability of the stator 2 , and further improving the reliability of the axial flux motor 100 .

[0085] In some embodiments, Figure 6As shown, there are multiple radial channels 211, which are arranged at intervals along the circumference of the stator 2, wherein a portion of the radial channels 211 is a first channel 2111, and another portion of the radial channels 211 is a second channel 2112. The second cooling cavity 202 is connected to the first cooling cavity 201 through the first channel 2111.

[0086] The second cooling cavity 202 is connected to the first cooling cavity 201 through the first channel 2111 , so that the second channel 2112 can be used for other functions, thereby more effectively improving the performance of the stator 2 and further improving the performance of the axial flux motor 100 .

[0087] Alternatively, if Figures 7 to 12 As shown, the axial flux motor 100 also includes a fixing ring 4 and a connecting member 5. The fixing ring 4 is arranged inside the stator core 21. The connecting member 5 passes through the second channel 2112. The inner end of the connecting member 5 is connected to the fixing ring 4, and the outer end of the connecting member 5 is connected to the housing 1.

[0088] By passing the connecting member 5 through the second channel 2112, and connecting the inner end of the connecting member 5 to the fixing ring 4, and connecting the outer end of the connecting member 5 to the shell 1, the stator core 21 and the shell 1 can be fixedly connected through the connecting member 5, so that the stator core 21 can be easily installed and fixed in the shell 1.

[0089] In the related art, in order to fix the stator core in the housing, a plurality of radially extending connectors are used, the connectors pass through the grooves of the stator core from the outside, and the outside of the connectors is fixed to the bracket on the outside of the stator core, and the inside of the connectors is fixed to the bracket on the inside of the stator core. Among them, the groove is provided with a notch facing the axial direction of the stator. This fixing method can only realize unidirectional fixing of the stator core in the axial direction of the stator, and cannot realize fixing in the direction where the notch is located. The overall fixing reliability of the stator core is poor, and there is a problem of reverse movement.

[0090] Optionally, the second channel 2112 is a radial through hole, and the connecting member 5 is positioned and matched with the second channel 2112 along the axial direction of the stator 2 .

[0091] By setting the second channel 2112 as a radial through hole, the connecting member 5 and the second channel 2112 are positioned and matched along the axial direction of the stator 2, so as to realize bidirectional fixation of the stator core 21, solve the problem of reverse movement of the stator core, improve the connection reliability between the stator 2 and the housing 1, and thus improve the reliability of the axial flux motor 100.

[0092] Alternatively, if Figure 6 As shown, the cross-sectional area of ​​the second channel 2112 is greater than the cross-sectional area of ​​the first channel 2111 .

[0093] The cross-sectional area of ​​the second channel 2112 can be understood as: the projection area of ​​the second channel 2112 in the radial direction of the stator 2 ; the cross-sectional area of ​​the first channel 2111 can be understood as: the projection area of ​​the first channel 2111 in the radial direction of the stator 2 .

[0094] By setting the cross-sectional area of ​​the second channel 2112 to be larger than the cross-sectional area of ​​the first channel 2111, the cross-sectional area of ​​the connecting member 5 can be set larger, thereby improving the structural strength of the connecting member 5, improving the connection reliability between the stator 2 and the housing 1, and further improving the reliability of the axial flux motor 100.

[0095] Alternatively, if Figure 6 As shown, there are multiple first channels 2111 and multiple second channels 2112 , and at least one first channel 2111 is provided between two adjacent second channels 2112 .

[0096] By providing at least one first channel 2111 between two adjacent second channels 2112, the first channels 2111 are arranged more evenly in the circumferential direction of the stator 2, so that the coolant flows more evenly in the circumferential direction of the stator 2, thereby improving the cooling and heat dissipation uniformity of the stator 2 and further improving the performance of the axial flux motor 100.

[0097] Optionally, the plurality of first channels 2111 are evenly spaced apart along the circumference of the stator 2 , and the second channels 2112 are evenly spaced apart along the circumference of the stator 2 .

[0098] Alternatively, if Fig.10 As shown, the fixing ring 4 includes a ring body 41 and a flange 42, the flange 42 is provided on the outer circumference of the ring body 41, the ring body 41 divides the second cooling chamber 202 into a first chamber and a second chamber, and at least one of the first chamber and the second chamber is communicated with the radial channel 211. The flange 42 is fixedly connected to the inner circumference of the stator core 21, and the flange 42 is provided with a flow passage 421, and the second chamber is communicated with the first chamber through the flow passage 421.

[0099] For example, multiple flanges 42 are arranged at intervals along the circumference of the stator 2 , and the multiple flanges 42 are interference fit with the inner circumference of the stator core 21 , and a flow channel 421 connecting the first chamber and the second chamber is formed between two adjacent flanges 42 .

[0100] By designing the fixing ring 4 as above, the connection between the fixing ring 4 and the stator core 21 can be easily achieved.

[0101] Alternatively, if Fig. 9 and Fig.11 As shown, a recessed groove 1031 is formed on the inner peripheral wall of the housing 1 , and the outer end of the connecting member 5 is attached to and connected to the recessed groove 1031 .

[0102] For example, six connectors 5 are arranged at intervals along the circumference of the stator 2, six recesses 1031 are arranged at intervals along the circumference of the stator 2, the connectors 5 correspond to the recesses 1031 one by one, and the outer end of each connector 5 is connected to the corresponding recess 1031 by a fastener. The fastener can be a bolt, a screw, a rivet, etc.

[0103] By providing a recessed groove 1031 on the inner circumferential wall of the housing 1, the outer end of the connector 5 is attached to and connected to the recessed groove 1031. The recessed groove 1031 can limit the outer end of the connector 5, prevent the connector 5 from deflecting along the circumferential direction of the stator 2, improve the connection reliability between the connector 5 and the housing 1, and further improve the reliability of the axial flux motor 100.

[0104] In some embodiments, Figure 5 and Figure 8 As shown, the stator core 21 is provided with winding slots 212 , the stator winding 22 is wound in the winding slots 212 , and the radial channels 211 and the winding slots 212 are arranged at intervals along the axial direction of the stator 2 .

[0105] For example, the winding slots 212 are disposed on one side of the radial channel 211 in the axial direction of the stator 2 ; or, the winding slots 212 are disposed on two opposite sides of the radial channel 211 in the axial direction of the stator 2 .

[0106] The radial channels 211 and the winding slots 212 are arranged at intervals along the axial direction of the stator 2 , which can improve the structural strength of the stator core 21 , thereby improving the reliability of the stator 2 and further improving the reliability of the axial flux motor 100 .

[0107] Alternatively, if Figure 5 As shown, there are two groups of winding slots 212, which are respectively arranged on both sides of the axial direction of the stator 2, and the radial channel 211 is arranged between the two groups of winding slots 212. Each winding slot 212 is provided with a stator winding 22.

[0108] At this time, the axial flux motor 100 is a dual-rotor single-stator motor.

[0109] By arranging the radial channel 211 between the two groups of winding slots 212, the coolant can simultaneously cool and dissipate heat of the stator windings 22 in the two groups of winding slots 212, thereby improving the heat dissipation uniformity of the stator 2 and further improving the reliability of the axial flux motor 100.

[0110] Alternatively, if Figure 5 As shown, the projection of the radial channel 211 in the axial direction of the stator 2 covers at least a portion of the winding slot 212 .

[0111] By making the projection of the radial channel 211 in the axial direction of the stator 2 cover at least a portion of the winding slot 212, the coolant flowing through the radial channel 211 can better cool and dissipate heat for the stator winding 22 in the winding slot 212, further improving the reliability of the axial flux motor 100.

[0112] In some embodiments, Figures 1 to 3 , Figure 7 and Fig. 9 As shown, the coolant inlet 11 and the coolant outlet 12 are arranged opposite to each other in the radial direction of the stator 2 .

[0113] The coolant inlet 11 and the coolant outlet 12 are arranged relative to each other along the radial direction of the stator 2, so that the coolant entering through the coolant inlet 11 flows fully and evenly in the shell 1 before flowing out from the coolant outlet 12, which can further improve the cooling and heat dissipation effect of the stator 2 and further improve the reliability of the axial flux motor 100.

[0114] Alternatively, if Figures 12 to 17 As shown, the stator winding 22 includes a coil winding 221, and the coil winding 221 is wound around the stator core 21. The coil winding 221 includes an outer ring body 222 and an inner ring body 223, and the inner ring body 223 is nested in the outer ring body 222. The stator 2 includes a busbar 23, one end of the outer ring body 222 is electrically connected to the busbar 23, the other end of the outer ring body 222 is electrically connected to one end of the inner ring body 223, and the other end of the inner ring body 223 is electrically connected to the busbar 23.

[0115] For example, two coil windings 221 are connected in series via a busbar 23. It should be noted that since the coil windings 221 are usually provided with three phases, there are multiple busbars 23, so that coil windings 221 of different phase lines are connected in series via different busbars 23.

[0116] The stator winding 22 is set to the above-mentioned structure, so that the following method can be used when manufacturing the stator winding 22: first, one of the wires is bent into an outer ring body 222 using a positioning column and a bending machine, and then the other wire is bent into an inner ring body 223 using a positioning column and a bending machine, and then the other end of the outer ring body 222 is electrically connected to one end of the inner ring body 223 to form a coil winding 221; then, the outer ring body 222 is electrically connected to the bus 23, and the inner ring body 223 is electrically connected to the bus 23.

[0117] The setting of the coil winding 221 allows the outer ring body 222 and the inner ring body 223 to be formed by bending the wire first, and then the outer ring body 222 and the inner ring body 223 are electrically connected, so that the stator winding 22 is simple to form and suitable for mass production, which is beneficial to reducing the cost of the stator 2, thereby reducing the cost of the axial flux motor 100.

[0118] Optionally, the coil winding 221 is provided with two types, namely a first coil and a second coil, a gap is provided between the first coil and the stator core 21 , a part of the second coil extends into the gap, so that the first coil and the second coil partially overlap in the radial and / or axial direction of the stator 2 .

[0119] By extending a portion of the second coil into the gap between the first coil and the stator core 21 , the gap between the first coil and the stator core 21 also has a coil structure, thereby avoiding space waste of the stator core 21 and improving space utilization of the stator core 21 .

[0120] Optionally, the first coil and the second coil both have a plane perpendicular to the axial direction of the stator 2 , the second coil is provided with an avoidance groove, and a portion of the first coil passes through the avoidance groove, so that in the radial direction of the stator 2 , the first coil and the second coil partially overlap.

[0121] By providing an avoidance groove in the second coil and allowing a portion of the first coil to pass through the avoidance groove, the first coil and the second coil can be partially overlapped in the radial direction of the stator 2, thereby improving the performance of the axial flux motor 100.

[0122] Optionally, one end of the outer ring body 222 is welded to one end of the inner ring body 223 .

[0123] For example, one end of the outer ring body 222 is aligned with one end of the inner ring body 223, and then laser welding or gas shielded welding is adopted to fix the outer ring body 222 and the inner ring body 223 in series to form a coil combination.

[0124] By welding one end of the outer ring body 222 to one end of the inner ring body 223, the electrical connection between the outer ring body 222 and the inner ring body 223 can be achieved without adding other electrical connectors, which is beneficial to simplify the structure of the stator winding 22, reduce the manufacturing cost of the stator 2, and further reduce the cost of the axial flux motor 100.

[0125] Alternatively, if Figures 13 to 17 As shown, the outer ring body 222 includes an outer ring body 2221, a first outer ring segment 2222 and a second outer ring segment 2223, and the two ends of the outer ring body 222 are respectively arranged at the first outer ring segment 2222 and the second outer ring segment 2223. The inner ring body 223 includes an inner ring body 2231, a first inner ring segment 2232 and a second inner ring segment 2233, and the two ends of the inner ring body 223 are respectively arranged at the first inner ring segment 2232 and the second inner ring segment 2233. The first outer ring segment 2222 is electrically connected to the busbar 23, the first inner ring segment 2232 is electrically connected to the busbar 23, and the second outer ring segment 2223 is electrically connected to the second inner ring segment 2233.

[0126] By electrically connecting the first outer ring segment 2222 to the bus 23, the first inner ring segment 2232 to the bus 23, and the second outer ring segment 2223 to the second inner ring segment 2233, the connection area between the first outer ring segment 2222 and the bus 23, between the first inner ring segment 2232 and the bus 23, and between the second outer ring segment 2223 and the second inner ring segment 2233 can be increased, thereby improving the connection reliability between the outer ring body 222 and the bus 23, between the outer ring body 222 and the inner ring body 223, and between the inner ring body 223 and the bus 23, improving the reliability of the stator 2, and thereby improving the reliability of the axial flux motor 100.

[0127] Alternatively, if Fig.15 and Fig.17 As shown, the second outer ring segment 2223 and the second inner ring segment 2233 are arranged on the same side of the outer ring body 2221 in the axial direction of the stator 2. The second outer ring segment 2223 and the second inner ring segment 2233 are arranged on the same side of the inner ring body 2231 in the axial direction of the stator 2.

[0128] Therefore, it is convenient to electrically connect the second outer ring segment 2223 and the second inner ring segment 2233 , thereby facilitating the processing and manufacturing of the stator 2 , which is beneficial to further reduce the cost of the axial flux motor 100 .

[0129] Alternatively, if Fig.15 and Fig.17 As shown, the first outer ring segment 2222 and the second outer ring segment 2223 are respectively arranged on opposite sides of the outer ring body 2221 in the axial direction of the stator 2. The first inner ring segment 2232 and the second inner ring segment 2233 are respectively arranged on opposite sides of the inner ring body 2231 in the axial direction of the stator 2.

[0130] For example, the outer ring body 2221 and the inner ring body 2231 each have a plane perpendicular to the axial direction of the stator 2. The first outer ring segment 2222, the second outer ring segment 2223, the first inner ring segment 2232 and the second inner ring segment 2233 each extend along the axial direction of the stator 2.

[0131] In this way, the first outer ring segment 2222, the second outer ring segment 2223, the first inner ring segment 2232 and the second inner ring segment 2233 can be avoided from being misconnected with corresponding components, which further facilitates the processing and manufacturing of the stator 2 and helps to further reduce the cost of the axial flux motor 100.

[0132] Alternatively, if Fig.13 , Fig.15 and Fig.17 As shown, the first outer ring segment 2222 and the first inner ring segment 2232 are arranged on the same side of the outer ring body 2221 in the axial direction of the stator 2, and the first outer ring segment 2222 and the first inner ring segment 2232 are arranged on the same side of the inner ring body 2231 in the axial direction of the stator 2.

[0133] By arranging the first outer ring segment 2222 and the first inner ring segment 2232 on the same side of the outer ring body 2221 in the axial direction of the stator 2, and arranging the first outer ring segment 2222 and the first inner ring segment 2232 on the same side of the inner ring body 2231 in the axial direction of the stator 2, the compactness of the layout of the bus 23 can be improved, which is beneficial to reducing the volume of the stator 2 and facilitating the miniaturization and lightweight design of the axial flux motor 100.

[0134] Alternatively, if Fig.12 and Fig.13 As shown, there are two groups of coil windings 221, which are arranged at intervals along the axial direction of the stator 2. The stator 2 includes an outgoing line row 25, and the busbar 23 is electrically connected to the outgoing line row 25. The outgoing line row 25 is arranged between the two groups of coil windings 221 in the axial direction of the stator 2.

[0135] For example, Fig.13 As shown, the two groups of coil windings 221 are respectively a first coil winding 2211 and a second coil winding 2212 , and the first coil winding 2211 and the second coil winding 2212 are respectively arranged on both sides of the stator core 21 in the axial direction of the stator 2 .

[0136] By providing two groups of coil windings 221 , and the two groups of coil windings 221 are arranged at intervals along the axial direction of the stator 2 , the overall performance of the axial flux motor 100 can be improved.

[0137] In some embodiments, in the axial direction of the stator 2, the coil windings 221 located on one side of the stator core 21 and in the same phase are welded together in series in sequence through the bus 23 to form a coil of U1 (or V1, or W1); in the axial direction of the stator 2, the coil windings 221 located on the other side of the stator core 21 and in the same phase are welded together in series in sequence through the bus 23 to form a coil of U2 (or V2, or W2); finally, U1 and U2 are welded together to form two parallel connections, which are finally combined into a U (or V, or W) phase line.

[0138] The coils connected in series on one side include two first coils and two second coils, which are arranged in sequence and connected in series through the busbar 23, and finally end at the outgoing line row 25, ensuring that the length and combination of each phase winding are consistent and the resistance value is the same. The outgoing line row 25 includes three welding points, which are respectively welded to the tail ends of the coils of U1, V1, and W1, and the stator winding 22 on one side forms a star connection structure.

[0139] Optionally, the outer ring body 222 and the inner ring body 223 are both wound with flat copper wire.

[0140] like Figure 5 and Figure 8As shown, the stator 2 further includes a first pressing plate 26 and a second pressing plate 27 . The first pressing plate 26 presses the first coil winding 2211 onto the stator core 21 , and the second pressing plate 27 presses the second coil winding 2212 onto the stator core 21 .

[0141] like Figure 4 As shown, there are two rotors 3, which are respectively a first rotor 301 and a second rotor 302. The first rotor 301 and the second rotor 302 are respectively arranged on both sides of the stator 2 in the axial direction of the stator 2. That is, the axial flux motor 100 is a dual-rotor single-stator motor.

[0142] By setting the number of rotors 3 to two, the overall performance of the axial flux motor 100 can be improved.

[0143] like Figure 3 and Figure 4 As shown, the axial flux motor 100 further includes a motor shaft 6 , a first bearing 71 , a second bearing 72 , a resolver stator 8 , a resolver cover plate 9 and a terminal block 10 .

[0144] The motor shaft 6 is inserted into the stator 2 and the rotor 3. The stator 2 is rotatably connected to the motor shaft 6 through the first bearing 71 and the second bearing 72. The stator 2 is fixedly connected to the motor shaft 6, and the rotor 3 rotates with the motor shaft 6. The resolver cover 9 is connected to the housing 1 and encloses a resolver cavity. The resolver stator 8 is arranged in the resolver cavity. The terminal block 10 is connected to the housing 1, and the output line row 25 is electrically connected to the terminal block 10.

[0145] Alternatively, if Fig.13 As shown, two groups of busbars 23 are provided, and the two groups of busbars 23 are arranged between the two groups of coil windings 221 in the axial direction of the stator 2 .

[0146] The two sets of busbars 23 are arranged between the two sets of coil windings 221 in the axial direction of the stator 2, so that the two sets of busbars 23 are close to each other, which is beneficial to improving the compactness of the stator 2 and facilitating the miniaturization and lightweight design of the axial flux motor 100.

[0147] In some embodiments, Figures 18 to 22 As shown, the rotor 3 includes a rotor disk 31 and a magnetic steel 32. The rotor disk 31 includes a first bracket 311 and a second bracket 312. The second bracket 312 is arranged on one side of the first bracket 311 in the axial direction of the stator 2 and is connected to the first bracket 311. The first bracket 311 is provided with a first clamping portion 31121, and the second bracket 312 is provided with a second clamping portion 31221. The magnetic steel 32 is clamped between the first clamping portion 31121 and the second clamping portion 31221 in the axial direction of the stator 2.

[0148] By configuring the rotor disk 31 to include a first bracket 311 and a second bracket 312 connected to each other, and providing a first clamping portion 31121 on the first bracket 311, and providing a second clamping portion 31221 on the second bracket 312, the magnetic steel 32 is clamped between the first clamping portion 31121 and the second clamping portion 31221 in the axial direction of the stator 2, thereby realizing axial positioning of the magnetic steel 32. When machining the rotor disk 31, it is only necessary to machine the first clamping portion 31121 on the first bracket 311, and the second clamping portion 31221 on the second bracket 312, thereby reducing the machining complexity of the rotor disk 31, thereby reducing the cost of the axial flux motor 100.

[0149] In the related art, bolts are usually used to connect the two internal components of the axial flux motor. Not only is the connection efficiency low, but there is also a risk of the bolts loosening when the rotor runs at high speed, and they may even fall into the air gap between the rotor and the stator, causing the axial flux motor to burn out.

[0150] In some embodiments, Figures 18 to 21 As shown, the second bracket 312 and the first bracket 311 are connected by rivets 34 .

[0151] For example, Figure 23 to Figure 25 As shown, the first bracket 311 is provided with a first connecting hole 31123, the second bracket 312 is provided with a second connecting hole 31212, the rivet 34 passes through the first connecting hole 31123 and the second connecting hole 31212, and the rivet 34 is squeezed along the axial direction of the rotor 3 to deform the two ends of the rivet 34, thereby realizing the connection between the first bracket 311 and the second bracket 312.

[0152] The first bracket 311 and the second bracket 312 are connected by rivets 34 , which can not only improve the connection efficiency between the first bracket 311 and the second bracket 312 , but also avoid the risk of bolts loosening and falling, thereby improving the reliability of the axial flux motor 100 .

[0153] Alternatively, if Fig.23 and Fig.24 As shown, the first bracket 311 includes a first ring body 3111 and a plurality of first clamping strips 3112, the plurality of first clamping strips 3112 are arranged at intervals along the circumference of the first ring body 3111, and the first clamping portion 31121 is provided on the first clamping strips 3112. Fig.25 As shown, the second bracket 312 includes a second ring body 3121 and a plurality of second clamping strips 3122 , the plurality of second clamping strips 3122 are arranged at intervals along the circumference of the second ring body 3121 , the second ring body 3121 is connected to the first ring body 3111 , and the second clamping portion 31221 is provided on the second clamping strip 3122 .

[0154] For example, the number of the first clamping bars 3112 and the number of the second clamping bars 3122 are both eight, the eight first clamping bars 3112 are evenly spaced along the circumferential direction of the stator 2 , and the eight second clamping bars 3122 are evenly spaced along the circumferential direction of the stator 2 .

[0155] By configuring the first bracket 311 to include a first ring body 3111 and a plurality of first clamping strips 3112, configuring the second bracket 312 to include a second ring body 3121 and a second clamping strip 3122, and utilizing the first ring body 3111 to connect with the second ring body 3121, the connection between the first bracket 311 and the second bracket 312 is achieved, and utilizing the first clamping strip 3112 and the second clamping strip 3122 to clamp the magnetic steel 32, the structures of the first bracket 311 and the second bracket 312 are simplified, and the processing and manufacturing of the first bracket 311 and the second bracket 312 are facilitated, thereby further reducing the cost of the axial flux motor 100.

[0156] It should be noted that the axial flux motor 100 according to the embodiment of the present disclosure does not limit the specific shapes of the first bracket 311 and the second bracket 312 .

[0157] Alternatively, if Fig.23 As shown, the first clamping strip 3112 is provided with a limiting portion 31122 , and the limiting portion 31122 abuts against the magnetic steel 32 along the circumferential direction of the stator 2 .

[0158] By providing a limiting portion 31122 on the first clamping strip 3112 and utilizing the limiting portion 31122 to stop the magnetic steel 32 along the circumferential direction of the stator 2, the magnetic steel 32 is limited in the circumferential direction of the stator 2, which facilitates the processing and manufacturing of the first bracket 311, thereby further reducing the cost of the axial flux motor 100.

[0159] Alternatively, if Fig.23 As shown, the first clamping strip 3112 includes a first surface and a second surface, the first surface intersects with the second surface, the first surface forms a first clamping portion 31121, and the second surface forms a limiting portion 31122. Fig.26 As shown, the magnetic steel 32 includes a first limiting surface 321 and a second limiting surface 322 . The first limiting surface 321 intersects with the second limiting surface 322 . The first limiting surface 321 abuts against the first surface, and the second limiting surface 322 abuts against the second surface.

[0160] For example, Fig.23 As shown, the first surface is perpendicular to the second surface, as Fig.26 As shown, the first limiting surface 321 is perpendicular to the second limiting surface 322 .

[0161] By forming the first clamping portion 31121 on the first surface of the first clamping strip 3112 and the limiting portion 31122 on the second surface, the structure of the first clamping strip 3112 is simplified, and the processing and manufacturing of the first bracket 311 is convenient, thereby further reducing the cost of the axial flux motor 100.

[0162] like Fig.23 As shown, the first clamping strip 3112 has two second surfaces, and the two second surfaces are respectively arranged on opposite sides of the first clamping strip 3112 in the circumferential direction of the stator 2. In two adjacent first clamping strips 3112, the second surface of each first clamping strip 3112 facing the other first clamping strip 3112 is used to cooperate with the same magnetic steel 32 to achieve the limitation of the magnetic steel 32 in the circumferential direction of the stator 2.

[0163] Optionally, the first clamping bars 3112 and the second clamping bars 3122 are arranged alternately along the circumferential direction of the stator 2 .

[0164] By arranging the first clamping strip 3112 and the second clamping strip 3122 alternately and spaced along the circumferential direction of the stator 2, the first clamping strip 3112 and the second clamping strip 3122 are respectively clamped at different positions of the magnetic steel 32, thereby improving the clamping reliability of the magnetic steel 32, thereby improving the reliability of the rotor 3, and further improving the reliability of the axial flux motor 100.

[0165] Alternatively, if Fig.26 As shown, the magnetic steel 32 is provided with a limiting groove 323 , and the second clamping strip 3122 is disposed in the limiting groove 323 .

[0166] By arranging the second clamping strip 3122 in the limiting groove 323 of the magnetic steel 32, not only the second clamping strip 3122 is utilized to clamp the magnetic steel 32, but also the second clamping strip 3122 can be prevented from protruding out of the magnetic steel 32 along the axial direction of the rotor 3, thereby reducing the axial dimension of the rotor 3 and facilitating a lightweight design of the rotor 3.

[0167] Optionally, the magnetic steel 32 is bonded to the rotor disk 31 .

[0168] For example, the first limiting surface 321 and the first clamping portion 31121 , the second limiting surface 322 and the limiting portion 31122 , and the groove wall of the limiting groove 323 and the second clamping strip 3122 are bonded by colloid.

[0169] The magnetic steel 32 is bonded to the rotor disk 31 , which can improve the connection reliability between the magnetic steel 32 and the rotor disk 31 , further improve the reliability of the rotor 3 , and thus further improve the reliability of the axial flux motor 100 .

[0170] Alternatively, if Fig.23 and Fig.25As shown, the first bracket 311 is provided with a slot 31111 , the notch of the slot 31111 faces the radial outer side of the rotor 3 , and the second bracket 312 is provided with a clamping protrusion 31211 , and the clamping protrusion 31211 is arranged in the slot 31111 .

[0171] For example, the first ring body 3111 is provided with a locking groove 31111 , and the second ring body 3121 is provided with a locking protrusion 31211 , and the locking protrusion 31211 is disposed in the locking groove 31111 .

[0172] By arranging the snap-fit ​​protrusion 31211 in the snap-fit ​​groove 31111, the first bracket 311 and the second bracket 312 are limited in the axial direction of the stator 2, thereby improving the connection reliability of the first bracket 311 and the second bracket 312, further improving the reliability of the rotor 3, and thus further improving the reliability of the axial flux motor 100.

[0173] Optionally, the size of the slot 31111 in the circumferential direction of the stator 2 is larger than the size of the engaging protrusion 31211 in the circumferential direction of the stator 2. The first bracket 311 is provided with a mounting slot 31112, which is communicated with the slot 31111 and allows the engaging protrusion 31211 to pass through in the radial direction of the rotor 3.

[0174] When the first bracket 311 and the second bracket 312 are assembled, the clamping protrusion 31211 is first passed through the notch of the installation groove 31112 along the radial direction of the rotor 3 and enters the clamping groove 31111, and then rotated along the circumferential direction of the rotor 3 by a certain angle (for example, 22.5°) so that the clamping protrusion 31211 is staggered with the installation groove 31112 to prevent the clamping protrusion 31211 from escaping from the installation groove 31112, thereby achieving the axial limitation of the first bracket 311 and the second bracket 312 in the rotor 3. Afterwards, the first bracket 311 is connected to the second bracket 312 to achieve a stable connection between the first bracket 311 and the second bracket 312.

[0175] The setting of the installation groove 31112 makes it easy to install the snap-in protrusion 31211 into the snap-in groove 31111, which is beneficial to improving the assembly efficiency of the first bracket 311 and the second bracket 312 and further reducing the cost of the axial flux motor 100.

[0176] Alternatively, if Fig.23 As shown, the clamping groove 31111 is annular, and the number of the mounting grooves 31112 and the clamping protrusions 31211 are both multiple, and the multiple mounting grooves 31112 are arranged at intervals along the circumferential direction of the stator 2. The mounting grooves 31112 and the clamping protrusions 31211 correspond one to one, and the mounting grooves 31112 allow the corresponding clamping protrusions 31211 to pass through in the radial direction of the rotor 3.

[0177] For example, the number of the mounting grooves 31112 and the number of the clamping protrusions 31211 are both eight, the eight mounting grooves 31112 are evenly spaced along the circumference of the rotor 3 , and the eight clamping protrusions 31211 are evenly spaced along the circumference of the rotor 3 .

[0178] When the first bracket 311 and the second bracket 312 are assembled, the engaging protrusion 31211 passes through the notch of the corresponding mounting groove 31112 along the radial direction of the rotor 3 and enters into the engaging groove 31111 .

[0179] By setting the slot 31111 to be annular and setting the number of the mounting slots 31112 and the snap-in protrusions 31211 to be multiple, the axial limiting reliability of the first bracket 311 and the second bracket 312 in the rotor 3 can be improved, and the reliability of the axial flux motor 100 can be further improved.

[0180] In some embodiments, Figures 18 to 22 As shown, the rotor 3 further includes a snap ring 33 , which is sleeved on the rotor disk 31 and connected to the rotor disk 31 , and the inner circumference of the snap ring 33 abuts against the outer circumference of the magnetic steel 32 .

[0181] The retaining ring 33 may be made of carbon fiber, which wraps around the outer circumference of the magnet 32 ​​to limit the radial direction of the stator 2 and prevent the magnet 32 ​​from detaching from the rotor disk 31 under the action of centrifugal force when the rotor 3 rotates.

[0182] The clamping ring 33 is provided to facilitate radial positioning of the magnetic steel 32 , thereby further reducing the cost of the axial flux motor 100 .

[0183] Rotor 3 assembly method:

[0184] The clamping protrusion 31211 of the second bracket 312 passes through the mounting groove 31112 of the first bracket 311 along the radial direction of the stator 2, and enters the clamping groove 31111 through the mounting groove 31112;

[0185] The second bracket 312 is rotated along the circumferential direction of the stator 2 so that the engaging protrusion 31211 is engaged with the engaging groove 31111. After the second connecting hole 31212 is aligned with the first connecting hole 31123, the second bracket 312 is stopped from rotating.

[0186] Insert the rivet 34 into the second connection hole 31212 and the first connection hole 31123 along the axial direction of the stator 2, and squeeze the two sides of the rivet 34 along the axial direction of the stator 2 so that the rivet 34 is in an I-shape as a whole, thereby connecting the second bracket 312 with the first bracket 311;

[0187] Apply glue to the surface of the magnetic steel 32 that contacts the rotor disk 31, and insert the magnetic steel 32 between the first clamping strip 3112 and the second clamping strip 3122 along the radial direction of the stator 2;

[0188] The retaining ring 33 is installed on the radial outer side of the magnetic steel 32 to complete the assembly of the rotor 3.

[0189] The vehicle of the embodiment of the present disclosure includes the axial flux motor 100 described in any of the above embodiments, wherein the vehicle may be a pure electric vehicle or a hybrid electric vehicle.

[0190] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present disclosure. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present disclosure.

Claims

1. An axial flux motor, characterized in that: include: A housing, wherein the housing is provided with a coolant inlet and a coolant outlet; A stator and a rotor, wherein the stator and the rotor are both arranged in the housing; Wherein, the stator comprises a stator core and a stator winding, the stator winding is wound on the stator core, the stator core is provided with a radial channel extending in the radial direction of the stator, a first cooling cavity is formed between the outer circumference of the stator core and the shell, the coolant inlet and the coolant outlet are both communicated with the first cooling cavity, a second cooling cavity is formed between the inner circumference of the stator core and the shell, and the first cooling cavity and the second cooling cavity are both communicated with the radial channel; There are multiple radial channels, and the multiple radial channels are arranged at intervals along the circumferential direction of the stator, wherein a part of the radial channels are first channels, and another part of the radial channels are second channels; The second cooling chamber is in communication with the first cooling chamber through the first channel; The axial flux motor further includes a fixing ring and a connecting piece, wherein the fixing ring is arranged inside the stator core, the connecting piece passes through the second channel, the inner end of the connecting piece is connected to the fixing ring, and the outer end of the connecting piece is connected to the housing.

2. The axial flux motor according to claim 1, characterized in that: The number of the radial channels is multiple, and the multiple radial channels are arranged at intervals along the circumferential direction of the stator; A portion of the radial channels is communicated with the coolant inlet, and another portion of the radial channels is communicated with the coolant outlet.

3. The axial flux motor according to claim 1, characterized in that: The radial passage is a radial through hole.

4. The axial flux motor according to claim 1, characterized in that: The second channel is a radial through hole, and the connecting member is positioned and matched with the second channel along the axial direction of the stator.

5. The axial flux motor according to claim 1, characterized in that: The cross-sectional area of ​​the second channel is greater than the cross-sectional area of ​​the first channel.

6. The axial flux motor according to claim 1, characterized in that: There are multiple first channels and multiple second channels, and at least one first channel is disposed between two adjacent second channels.

7. The axial flux motor according to claim 1, characterized in that: The fixing ring includes a ring body and a flange, wherein the flange is arranged on the outer circumferential surface of the ring body, the ring body divides the second cooling cavity into a first cavity and a second cavity, at least one of the first cavity and the second cavity is communicated with the radial channel, the flange is fixedly connected to the inner circumferential surface of the stator core, the flange is provided with a flow passage, and the first cavity is communicated with the second cavity through the flow passage.

8. The axial flux motor according to claim 1, characterized in that: The inner peripheral wall of the shell is provided with a sinking groove, and the outer end of the connecting piece is attached to and connected with the sinking groove.

9. The axial flux motor according to claim 1, characterized in that: The stator core is provided with winding slots, the stator winding is wound in the winding slots, and the radial channels and the winding slots are spaced apart along the axial direction of the stator.

10. The axial flux motor according to claim 9, characterized in that: The winding slots are provided with two groups, and the two groups of winding slots are respectively provided on both sides of the axial direction of the stator, the radial channel is provided between the two groups of winding slots, and the stator winding is provided in each winding slot.

11. The axial flux motor according to claim 9, characterized in that: A projection of the radial passage in the axial direction of the stator covers at least a portion of the winding slot.

12. The axial flux motor according to claim 1, characterized in that: The coolant inlet and the coolant outlet are arranged opposite to each other in a radial direction of the stator.

13. The axial flux motor according to claim 1, characterized in that: The stator winding comprises a coil winding, the coil winding is wound around the stator core, the coil winding comprises an outer ring body and an inner ring body, the inner ring body is nested in the outer ring body; The stator includes a busbar, one end of the outer ring body is electrically connected to the busbar, the other end of the outer ring body is electrically connected to one end of the inner ring body, and the other end of the inner ring body is electrically connected to the busbar.

14. The axial flux motor according to claim 13, characterized in that: One end of the outer ring body is welded to one end of the inner ring body.

15. The axial flux motor according to claim 13, characterized in that: The outer ring body comprises an outer ring body, a first outer ring segment and a second outer ring segment, and two ends of the outer ring body are respectively arranged at the first outer ring segment and the second outer ring segment; The inner ring body comprises an inner ring body, a first inner ring segment and a second inner ring segment, and two ends of the inner ring body are respectively arranged at the first inner ring segment and the second inner ring segment; The first outer ring segment is electrically connected to the bus bar, the first inner ring segment is electrically connected to the bus bar, and the second outer ring segment is electrically connected to the second inner ring segment.

16. The axial flux motor according to claim 15, characterized in that: The second outer ring segment and the second inner ring segment are arranged on the same side of the outer ring body in the axial direction of the stator; The second outer ring segment and the second inner ring segment are arranged on the same side of the inner ring body in the axial direction of the stator.

17. The axial flux motor according to claim 15, characterized in that: The first outer ring segment and the second outer ring segment are respectively arranged on opposite sides of the outer ring body in the axial direction of the stator; The first inner ring segment and the second inner ring segment are respectively arranged on opposite sides of the inner ring body in the axial direction of the stator.

18. The axial flux motor according to claim 17, characterized in that: The first outer ring segment and the first inner ring segment are arranged on the same side of the outer ring body in the axial direction of the stator, and the first outer ring segment and the first inner ring segment are arranged on the same side of the inner ring body in the axial direction of the stator.

19. The axial flux motor according to claim 13, characterized in that: The coil windings are provided with two groups, and the two groups of coil windings are arranged at intervals along the axial direction of the stator; The stator comprises an outgoing line row, the bus bar is electrically connected to the outgoing line row, and the outgoing line row is arranged between the two groups of coil windings in the axial direction of the stator.

20. The axial flux motor according to claim 19, characterized in that The busbars are provided in two groups, and the two groups of busbars are arranged between the two groups of coil windings in the axial direction of the stator.

21. The axial flux motor according to claim 1, characterized in that The rotor comprises: A rotor disk, the rotor disk comprising a first bracket and a second bracket, the second bracket being arranged at one side of the first bracket in the axial direction of the stator and connected to the first bracket, the first bracket being provided with a first clamping portion, and the second bracket being provided with a second clamping portion; A magnetic steel is clamped between the first clamping portion and the second clamping portion in the axial direction of the stator.

22. The axial flux motor according to claim 21, characterized in that The first bracket is provided with a clamping slot, the notch of which faces the radial outer side of the rotor, and the second bracket is provided with a clamping protrusion, which is arranged in the clamping slot.

23. The axial flux motor according to claim 22, characterized in that The size of the clamping groove in the circumferential direction of the stator is greater than the size of the clamping protrusion in the circumferential direction of the stator; The first bracket is provided with a mounting groove, the mounting groove is communicated with the clamping groove, and the mounting groove is used for the clamping protrusion to pass through along the radial direction of the rotor.

24. The axial flux motor according to claim 23, characterized in that The clamping groove is annular, and there are multiple mounting grooves and clamping protrusions. The multiple mounting grooves are arranged at intervals along the circumference of the stator. The mounting grooves and the clamping protrusions correspond one to one, and the mounting grooves are used for the corresponding clamping protrusions to pass through along the radial direction of the rotor.

25. The axial flux motor according to claim 21, characterized in that The first bracket includes a first ring body and a plurality of first clamping strips, wherein the plurality of first clamping strips are arranged at intervals along the circumference of the first ring body, and the first clamping portion is provided on the first clamping strips; The second bracket includes a second ring body and a plurality of second clamping strips, wherein the plurality of second clamping strips are arranged at intervals along the circumference of the second ring body, the second ring body is connected to the first ring body, and the second clamping portion is provided on the second clamping strips.

26. The axial flux motor according to claim 25, characterized in that The first clamping strip is provided with a limiting portion, and the limiting portion abuts against the magnetic steel along the circumferential direction of the stator.

27. The axial flux motor according to claim 25, characterized in that The first clamping bars and the second clamping bars are arranged alternately and spaced apart along a circumferential direction of the stator.

28. The axial flux motor according to claim 27, characterized in that The magnetic steel is provided with a limiting groove, and the second clamping strip is arranged in the limiting groove.

29. A vehicle, characterized in that: include: An axial flux motor as claimed in any one of claims 1 to 28.

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