CN116937839A - Stator assembly, axial flux motor and vehicle - Google Patents

Abstract

The invention provides a stator assembly, an axial flux motor and a vehicle, wherein the stator assembly comprises a stator bracket and a plurality of stator iron cores, the outer peripheral surface of the stator bracket is provided with a water inlet and a water outlet, the outer peripheral surface of the stator bracket is provided with a plurality of first mounting grooves, a circulating cooling channel is arranged in the stator bracket, the water inlet and the water outlet are communicated with the circulating cooling channel, the stator iron cores are wound with coils, and the plurality of stator iron cores are correspondingly arranged in the plurality of first mounting grooves one by one.

Description

Stator assembly, axial flux motor and vehicle

Technical Field

The invention relates to the technical field of motors, in particular to a stator assembly, an axial flux motor and a vehicle.

Background

The power performance of the new energy automobile is restricted by the power of the motor, and the overall size and the heat dissipation efficiency of the motor prevent the power of the motor from being improved. In the related art, the new energy automobile adopts an axial flux motor, the heat radiation performance of the motor is improved by arranging the cooling channel in the stator bracket, but the water inlet and the water outlet of the cooling channel are arranged on one side of the axial direction of the stator bracket, so that the axial space of the motor is occupied, the axial size of the motor is increased, and the improvement of the motor power is influenced.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

To this end, embodiments of the present invention provide a stator assembly that can improve heat dissipation performance of a motor and can reduce an axial size of the motor, thereby facilitating improvement of motor power.

The embodiment of the invention provides an axial flux motor which has the advantages of small axial size, good heat dissipation performance and high power.

The embodiment of the invention provides a vehicle, which has the advantage of good power performance.

The stator assembly of the embodiment of the invention comprises: the stator support is provided with a water inlet and a water outlet on the outer peripheral surface, a plurality of first mounting grooves are formed in the outer peripheral surface of the stator support, a circulating cooling channel is formed in the stator support, and the water inlet and the water outlet are communicated with the circulating cooling channel; and the stator cores are wound with coils, and the stator cores are arranged in the first mounting grooves in a one-to-one correspondence manner.

According to the stator assembly provided by the embodiment of the invention, the stator iron core is arranged in the first mounting groove on the outer peripheral surface of the stator support, the coil is wound on the iron core, and the circulating cooling channel is used for cooling and radiating the stator support, so that the radiating efficiency of the coil can be improved, and the radiating performance and the power of the motor can be improved.

In addition, the water inlet and the water outlet of the circulating cooling channel are arranged on the outer peripheral surface of the stator bracket, so that the axial space is not occupied, the axial size of the motor can be reduced, and the power of the motor can be improved.

Therefore, the stator assembly provided by the embodiment of the invention can improve the heat radiation performance of the motor and reduce the axial size of the motor, thereby being beneficial to improving the power of the motor.

In some embodiments, the stator frame has a first center hole, the circulating cooling channel includes a plurality of circulating channels and a plurality of circulating cavities, the circulating cavities are located at one side of the circulating channels adjacent to the first center hole, the plurality of circulating channels and the plurality of first mounting grooves are alternately arranged at intervals along the circumferential direction of the stator frame, the plurality of circulating cavities are isolated from each other and are arranged along the circumferential direction of the first center hole, and one circulating cavity is communicated with two adjacent circulating channels.

In some embodiments, one of the plurality of circulation channels comprises a water inlet channel and a water outlet channel that are independent of each other, the water inlet channel being in communication with the water inlet, the water outlet channel being in communication with the water outlet, the water inlet channel being in communication with one of the two adjacent circulation chambers, the water outlet channel being in communication with the other of the two adjacent circulation chambers.

In some embodiments, the stator support includes a baffle, an annular cavity surrounding the first central bore is provided inside the stator support, and the baffle is provided within the annular cavity and divides the annular cavity into a plurality of the circulation cavities.

In some embodiments, the baffle plate includes a partition plate, a plurality of first partitions and a plurality of second partitions, the plurality of first partitions being arranged at intervals in a circumferential direction of the stator frame on one side of the partition plate in an axial direction of the center body, the second partitions being arranged at intervals in the circumferential direction of the stator frame on the other side of the partition plate in the axial direction of the center body, wherein the plurality of first partitions and the plurality of second partitions are alternately arranged in the circumferential direction of the stator frame.

The axial flux motor of the embodiment of the invention comprises a stator assembly and two rotor assemblies, wherein the stator assembly is positioned between the two rotor assemblies in the axial direction of the stator bracket, and the stator assembly comprises the stator assembly of any embodiment.

In some embodiments, the rotor assembly comprises a rotor disc and a plurality of permanent magnets, wherein a plurality of second mounting grooves are formed in the surface, adjacent to the stator assembly, of the rotor disc, the second mounting grooves are arranged at intervals in the circumferential direction of the stator support, the permanent magnets are arranged in the second mounting grooves in a one-to-one correspondence mode, and the dimension of the permanent magnets in the axial direction of the stator support is smaller than or equal to the dimension of the second mounting grooves in the axial direction of the stator support.

In some embodiments, the rotor assembly further comprises a limiting plate, a connecting groove is formed in the surface, adjacent to the stator assembly, of the rotor disc, the connecting groove is communicated with at least one second mounting groove, the limiting plate is arranged in the connecting groove and connected with the bottom wall surface of the connecting groove, the limiting plate comprises a second limiting portion, the permanent magnet comprises a contact portion, the contact portion is located on one side, far away from the stator assembly, of the second limiting portion in the axial direction of the stator support, the contact portion abuts against the second limiting portion, and the size, in the axial direction of the stator support, of the limiting plate is smaller than or equal to the size, in the axial direction of the stator support, of the connecting groove.

In some embodiments, the plurality of limiting plates are provided, the plurality of connecting grooves are arranged at intervals in the circumferential direction of the stator support, the plurality of connecting grooves and the plurality of second mounting grooves are alternately arranged in the circumferential direction of the stator support, and the plurality of limiting plates are arranged in the connecting grooves in a one-to-one correspondence manner; or,

the plurality of limiting plates are arranged, the plurality of connecting grooves are arranged at intervals in the circumferential direction of the stator support, the connecting grooves are positioned on one side of the second mounting groove in the radial direction of the stator support, and the plurality of limiting plates are arranged in the connecting grooves in a one-to-one correspondence manner; or,

the limiting plate is an annular plate, the connecting groove is an annular groove, the limiting plate and the connecting groove extend along the circumferential direction of the stator support, and the connecting groove is located at one side of the second mounting groove in the radial direction of the stator support.

The vehicle of the embodiment of the invention comprises the axial flux motor of any of the embodiments.

Drawings

Fig. 1 is a schematic structural view of a stator assembly according to an embodiment of the present invention.

Fig. 2 is an exploded schematic view of a stator assembly of an embodiment of the present invention.

FIG. 3 is a schematic illustration of the flow inside the recirculating cooling passage of an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of an axial-flux motor of an embodiment of the invention.

Fig. 5 is an exploded schematic view of an axial flux electric machine of an embodiment of the present invention.

Fig. 6 is a schematic structural view of a rotor assembly according to an embodiment of the present invention.

FIG. 7 is an exploded schematic view of a rotor assembly of an embodiment of the present invention.

Reference numerals:

a stator assembly 100;

a stator holder 10; a first mounting groove 101; a first central aperture 102; a first annular projection 1021; a central body 11; an annular cavity 1101; a first cavity 11011; a second cavity 11012; a body 111; a projection 1111; a baffle 112; a partition plate 1121; a first seal plate 1122; a second sealing plate 1123; a cover plate 113; a frame 12; a water inlet 1201; a water outlet 1202; a first frame 12-1; a second frame 12-2; a circulation duct 121; first radial bore 1211; a second radial bore 1212; third radial aperture 1213; fourth radial passages 1214; a communication duct 1215; ligating groove 122; a card protrusion 123; a closure member 13;

a stator core 20; a recess 201; a strap 30; a stopper 40; a first stopper 41; a connection portion 42; a card slot 421;

a rotor assembly 200;

a rotor disk 50; a second central bore 501; a second mounting groove 502; a connection groove 503; circular grooves 504; a threaded bore 5031; a permanent magnet 60; a contact portion 61; a limiting plate 70; a second stopper 71; a counter bore 701; countersunk head bolts 80;

a first fluid section 91; a second fluid section 92; a third fluid section 93; a fourth fluid section 94; a fifth fluid section 95; a sixth fluid segment 96;

a housing 300; a first end cap 310; a second end cap 320; a containment vessel 330; a water inlet 331; a water outlet 332; a connection terminal 333; a second annular projection 334; a snap ring 335; a water inlet pipe 341; a water outlet pipe 342; a junction box 350;

a rotor shaft 400; a shoulder 410; a third annular projection 411; bearing press plate 420; fourth annular projection 421;

a first bearing 510; a second bearing 520;

the assembly 600 is rotated.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

A stator assembly 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, 2, 4 and 5, the stator assembly 100 of the embodiment of the present invention includes a stator frame 10 and a plurality of stator cores, the stator frame 10 including a first center hole 102, the first center hole 102 for penetrating a rotor shaft 400. The outer peripheral surface of the stator support 10 is provided with a water inlet 1201 and a water outlet 1202, the outer peripheral surface of the stator support 10 is provided with a plurality of first mounting grooves 101, the inside of the stator support 10 is provided with a circulating cooling channel, and the water inlet 1201 and the water outlet 1202 are both communicated with the circulating cooling channel. Thus, the cooling liquid may enter the circulation cooling passage through the water inlet 1201 and be discharged through the water outlet 1202, thereby cooling the stator frame 10.

The stator cores are wound with coils, and the plurality of stator cores are arranged in the plurality of first mounting grooves 101 in a one-to-one correspondence. It can be appreciated that the circulation cooling channels inside the stator frame 10 are arranged along the circumferential direction of the first mounting groove 101, thereby improving the heat dissipation effect to the stator core and the coils.

According to the stator assembly 100 provided by the embodiment of the invention, the stator core is arranged in the first mounting groove 101 on the outer peripheral surface of the stator bracket 10, the coil is wound on the core, and the circulating cooling channel is used for cooling and radiating the stator bracket 10, so that the radiating efficiency of the coil can be improved, and the radiating performance and the power of the motor can be improved.

In addition, the water inlet 1201 and the water outlet 1202 of the circulation cooling passage are provided on the outer circumferential surface of the stator frame 10 so as not to occupy an axial space, and thus the axial size of the motor can be reduced, thereby being advantageous for improving the power of the motor.

Thus, the stator assembly 100 of the embodiment of the invention can improve the heat dissipation performance of the motor and reduce the axial size of the motor, thereby being beneficial to improving the power of the motor.

In some embodiments, as shown in fig. 1 and 2, the circulating cooling channel includes a plurality of circulating channels and a plurality of circulating cavities, the circulating cavities are located at one side of the circulating channels 121 adjacent to the first central hole 102, the plurality of circulating channels 121 and the plurality of first mounting grooves 101 are alternately arranged at intervals along the circumferential direction of the stator frame, the plurality of circulating cavities are isolated from each other and are arranged along the circumferential direction of the first central hole 102, and one circulating cavity is communicated with two adjacent circulating channels 121.

Specifically, as shown in fig. 1 and 2, the stator frame 10 includes a central body 11 and a plurality of frame bodies 12, the plurality of frame bodies 12 being arranged on an outer peripheral surface of the central body 11 at intervals in a circumferential direction of the stator frame 10. The circulating cooling channel comprises a first part arranged in the frame body 12 and a second part arranged in the central body 11, wherein the first part comprises a water inlet channel and a water outlet channel, the water inlet channel is communicated with the water inlet 1201, and the water outlet channel is communicated with the water outlet 1202. Wherein the water inlet 1201 and the water outlet 1202 are provided on a surface of the housing 12 remote from the central body 11 in a radial direction of the stator frame 10.

It will be appreciated that the first portion and the second portion of the circulation cooling channel are disposed along the circumference of the first mounting groove 101, so that the heat dissipation effect on the stator core and the coil can be improved, and the second portion is further disposed along the circumference of the first central hole 102, so that the heat dissipation can be performed on the friction pair formed by the rotor shaft 400 and the first central hole 102, thereby improving the heat dissipation performance and the power of the motor, which are beneficial to improving the heat dissipation performance and the power of the motor.

Further, as shown in fig. 1 and 2, a plurality of circulation chambers are provided in the central body 11, circulation channels 121 are provided in the frame body 12, the circulation chambers are located downstream of the water inlet channel and upstream of the water outlet channel, one circulation chamber is communicated with the circulation channels 121 of two adjacent frame bodies 12, the circulation channels 121 of the plurality of frame bodies 12 form a first portion, and the plurality of circulation chambers form a second portion.

It will be appreciated that, after entering the circulation cooling channel through the water inlet 1201, the cooling fluid circulates between the circulation duct 121 and the circulation chamber until flowing out from the water outlet 1202, so that heat dissipation can be continuously performed on the stator core, the coil, and the friction pair formed by the rotor shaft 400 and the first central hole 102.

In some embodiments, one of the plurality of circulation channels comprises a water inlet channel and a water outlet channel independent from each other, the water inlet channel being in communication with the water inlet 1201, the water outlet channel being in communication with the water outlet 1202, the water inlet channel being in communication with one of the two adjacent circulation chambers, the water outlet channel being in communication with the other of the two adjacent circulation chambers.

Specifically, as shown in fig. 1 and 2, the circulation duct 121 of one frame 12 includes a first radial duct 1211 and a second radial duct 1212 that are independent from each other, the first radial duct 1211 forming a water intake passage, the second radial duct 1212 forming a water outlet passage, the first radial duct 1211 communicating with one of two adjacent circulation chambers, and the second radial duct 1212 communicating with the other of the two adjacent circulation chambers. That is, the cooling fluid enters one of the two adjacent circulation chambers through the water inlet 1201 and the first radial duct 1211, then circulates between the downstream circulation duct 121 and the circulation chamber, and finally enters the other of the two adjacent circulation chambers and the second radial duct 1212, and flows out of the water outlet 1202.

Preferably, the circulation duct 121 of each of the remaining frames 12 comprises a third radial duct 1213, a fourth radial duct 1214 and a communication duct 1215, the communication duct 1215 communicating with the third radial duct 1213 and the fourth radial duct 1214, the third radial duct 1213 communicating with one of the two adjacent circulation chambers, the fourth radial duct 1214 communicating with the other of the two adjacent circulation chambers. That is, the circulation duct 121 of each of the remaining frame bodies 12 is redirected through at least one bending, thereby increasing the path of the cooling liquid, which is advantageous for improving the heat dissipation effect.

It will be appreciated that the one frame 12 is a first frame 12-1 and each of the remaining frames 12 is a second frame 12-2.

In some embodiments, as shown in fig. 2, the stator support includes a baffle, an annular cavity surrounding the first central hole is provided inside the stator support, and the baffle is provided in the annular cavity and divides the annular cavity into a plurality of the circulation cavities.

Specifically, the central body 11 includes a body 111, a baffle 112 and a cover plate 113, the plurality of frame bodies 12 are arranged on the outer circumferential surface of the body 111 at intervals along the circumferential direction of the stator frame 10, an annular cavity 1101 is formed between the body 111 and the cover plate 113, the baffle 112 is disposed in the cavity, and the baffle 112 partitions the annular cavity 1101 into a plurality of circulation chambers.

That is, the baffle 112 divides the annular cavity 1101 into a plurality of independent circulation chambers, so that the cooling liquid can continuously flow in the circulation cooling channel, and the heat exchange efficiency can be improved, thereby improving the heat dissipation effect. It can be understood that the circulating cooling channel in the embodiment of the invention can directly feed the cooling liquid, and the cooling liquid is directly contacted with the frame body 12 and the central body 11, so that the heat dissipation effect is further improved. In addition, the stator assembly 100 of the embodiment of the invention saves pipelines, reduces manufacturing difficulty, and can also avoid leakage of cooling liquid caused by pipeline breakage.

In some embodiments, as shown in fig. 2 and 4, the baffle 112 includes a partition plate 1121 and a plurality of and partitions arranged at intervals in the circumferential direction of the stator frame 10 on one side of the partition plate 1121 in the axial direction of the central body 11, and a plurality of second partitions arranged at intervals in the circumferential direction of the stator frame 10 on the other side of the partition plate 1121 in the axial direction of the central body 11, wherein the plurality of first partitions and the plurality of second partitions are alternately arranged in the circumferential direction of the stator frame 10.

That is, the partition plate 1121 partitions the annular cavity 1101 into a first cavity 11011 and a second cavity 11012 in the axial direction (left-right direction in fig. 1) of the central body 11, the first cavity 11011 including a part of the plurality of circulation chambers, and the second cavity 11012 including the rest of the plurality of circulation chambers. The first partition is disposed in the first cavity 11011, a part of the plurality of circulation chambers is partitioned by the first partition, the second partition is disposed in the second cavity 11012, and the rest of the plurality of circulation chambers is partitioned by the second partition.

It can be understood that a part of the plurality of circulation cavities is a plurality of first circulation cavities, the rest of the plurality of circulation cavities is a plurality of second circulation cavities, the partition plate 1121 divides the annular cavity 1101 into a first cavity 11011 on the left side and a second cavity 11012 on the right side, the first cavity 11011 is divided into a plurality of first circulation cavities by the first partition portion, the second cavity 11012 is divided into a plurality of second circulation cavities by the second partition portion, and the plurality of first circulation cavities and the plurality of second circulation cavities are staggered along the circumferential direction of the stator support 10. Therefore, the length of the circulating cooling channel is increased, so that the path of cooling liquid is increased, and the heat dissipation effect is improved.

In addition, as shown in fig. 2, the first partition includes two first sealing plates 1122 spaced apart in the circumferential direction of the central body 11, and the second partition includes two second sealing plates 1123 spaced apart in the circumferential direction of the central body 11, both of which are sealed twice, so that the sealing effect of the adjacent circulation chambers can be improved, which is advantageous in improving the continuity of the flow of the cooling liquid.

As shown in fig. 3, the cooling liquid in the embodiment of the present invention continuously flows in the circulating cooling channel to form a continuous fluid, and the fluid includes a first fluid section 91, a second fluid section 92, a third fluid section 93, a fourth fluid section 94, a fifth fluid section 95, and a sixth fluid section 96. Wherein the first fluid segment 91 is located within the first radial bore 1211, the second fluid segment 92 is located within the circulation cavity, the third fluid segment 93 is located within the third radial bore 1213, the fourth fluid segment 94 is located within the communication bore 1215, the fifth fluid segment 95 is located within the fourth radial bore 1214, and the sixth fluid segment 96 is located within the second radial bore 1212.

In some alternative embodiments, as shown in fig. 1 and 2, the stator frame 10 is formed by die casting, and the first portion of the circulation cooling channel is a channel of the stator frame 10 formed by loose core. That is, the stator frame 10 forms the first radial hole 1211, the second radial hole 1212, the third radial hole 1213, the fourth radial hole 1214, and the communication hole 1215 through core pulling during the die casting. The core-pulling port at one end of the first radial duct 1211 is communicated with the first cavity 11011, the core-pulling port at the other end forms the water inlet 1201, the core-pulling port at one end of the second radial duct 1212 is communicated with the second cavity 11012, the core-pulling port at the other end forms the water outlet 1202, the core-pulling port at one end of the third radial duct 1213 is communicated with the first cavity 11011, the core-pulling port at the other end is sealed by using the plugging member 2013, the core-pulling port at one end of the fourth radial duct 1214 is communicated with the second cavity 11012, the core-pulling port at the other end is sealed by using the plugging member 2013, and the core-pulling ports at both ends of the communicated duct 1215 are sealed by using the plugging member 2013. It is understood that the plug 2013 may be a bowl-shaped plug, blind rivet plug, or other plug 2013.

Therefore, the frame body 12 and the body 111 are integrally formed, and the circulating cooling channel is integrated in the stator bracket 10, so that the circulating cooling channel can directly feed cooling liquid, and the cooling liquid is directly contacted with the frame body 12 and the central body 11, thereby improving the heat dissipation effect. In addition, the stator assembly 100 of the embodiment of the invention saves pipelines, reduces manufacturing difficulty, and can also avoid leakage of cooling liquid caused by pipeline breakage.

In some embodiments, as shown in fig. 1 and 2, the stator assembly 100 of the embodiment of the present invention further includes a strap 30 and a plurality of limiting brackets 40, the strap 30 is wound on the outer circumferential surface of the stator frame 10 in the circumferential direction of the stator frame 10 and is electrically connected with the strap 30 and the coil of each of the plurality of stator cores, the strap 30 is connected with a connection terminal 333, and the strap 30 is electrically connected with the battery through the connection terminal 333, so that the coils on the plurality of stator cores can be simultaneously energized.

The plurality of limiting frames 40 are in one-to-one correspondence with the plurality of stator cores, the limiting frames 40 comprise first limiting portions 41 and connecting portions 42, the first limiting portions 41 are in contact with one side, far away from the center hole, of the stator core in the radial direction of the stator support 10, and the connecting portions 42 are connected with the stator support 10, so that the stator core can be limited in the radial direction of the stator support 10. Wherein, the frame body 12 of the stator bracket 10 is provided with a clamping protrusion 123, and a limiting frame 40 comprises two connecting portions 42, and the connecting portions 42 are provided with clamping grooves 421 matched with the clamping protrusions 123, so that the stability of the limiting frame 40 can be improved.

Further, the bottom wall surface of the first mounting groove 101 is provided with a projection 1111, and the stator core is provided with a recess 201 on a side of the stator frame 10 in the radial direction adjacent to the center hole, and the projection 1111 is fitted in the recess 201, so that the stator core can be restrained in the axial direction (left-right direction in fig. 1) of the stator frame 10.

As shown in fig. 2, the frame body 12 of the stator frame 10 is provided with a binding groove 122, the binding band 30 may be inserted into the binding groove 122, and a portion of the binding band 30 electrically connected with the coil is located between the first limiting part 41 and the stator core, so that the binding band 30 may be stably electrically connected with the coil.

An axial flux electric machine according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 4 and 5, the axial flux motor of the embodiment of the present invention includes a stator assembly 100 and two rotor assemblies 200, the stator assembly 100 being located between the two rotor assemblies 200 in the axial direction of the stator frame 10, the stator assembly 100 including the stator assembly 100 of any of the above embodiments.

In some embodiments, as shown in fig. 6 and 7, the rotor assembly 200 includes a rotor disk 50, a plurality of permanent magnets 60, a surface of the rotor disk 50 adjacent to the stator assembly 100 is provided with a plurality of second mounting grooves 502, the plurality of second mounting grooves 502 are arranged at intervals in the circumferential direction of the stator frame 10, the plurality of permanent magnets 60 are provided in the second mounting grooves 502 in one-to-one correspondence, and a dimension of the permanent magnets 60 in the axial direction of the stator frame 10 is smaller than or equal to a dimension of the second mounting grooves 502 in the axial direction of the stator frame 10. That is, the surface of the permanent magnet 60 adjacent to the stator assembly 100 is not higher than the surface of the rotor disk 50 adjacent to the stator assembly 100, so that the permanent magnet 60 does not occupy additional axial space, the axial size of the motor can be reduced, and the power of the motor can be advantageously increased.

In some embodiments, as shown in fig. 6 and 7, the rotor assembly 200 further includes a limiting plate 70, the surface of the rotor disk 50 adjacent to the stator assembly 100 is provided with a connecting groove 503, the connecting groove 503 is communicated with at least one second mounting groove 502, the limiting plate 70 is disposed in the connecting groove 503 and connected to a bottom wall surface of the connecting groove 503, the limiting plate 70 includes a second limiting portion 71, the permanent magnet 60 includes a contact portion 61, the contact portion 61 is located at a side of the second limiting portion 71 away from the stator assembly 100 in an axial direction of the stator frame 10, and the contact portion 61 abuts against the second limiting portion 71, and a dimension of the limiting plate 70 in the axial direction of the stator frame 10 is smaller than or equal to a dimension of the connecting groove 503 in the axial direction of the stator frame 10. That is, the surface of the limiting plate 70 adjacent to the stator assembly 100 is not higher than the surface of the rotor disk 50 adjacent to the stator assembly 100, so the limiting plate 70 does not occupy additional axial space.

It can be appreciated that after the permanent magnet 60 is radially and circumferentially positioned in the second mounting groove 502, axial limitation is performed by the limiting plate 70, and the permanent magnet 60 and the limiting plate 70 do not occupy additional axial space, so that the axial size of the motor can be reduced, and further, the power of the motor can be improved.

Alternatively, the surface of the contact portion 61 contacting the stopper portion may be a stepped surface or an inclined surface, and the surface of the stopper portion contacting the contact portion 61 is a stepped surface or an inclined surface.

Further, as shown in fig. 6 and 7, the stopper plate 70 is connected to the bottom wall surface of the connecting groove 503 by a bolt. Preferably, the bottom wall surface of the connecting groove 503 is provided with a threaded hole 5031, the limiting plate 70 is provided with a countersunk hole 701, the bolt is a countersunk bolt 80, a screw rod of the countersunk bolt 80 passes through the countersunk hole 701 to be matched with the threaded hole 5031, and a screw head part of the countersunk bolt 80 is matched in the countersunk hole 701, so that the countersunk bolt 80 does not occupy an axial space, the axial size of the motor can be reduced, and the power of the motor can be improved.

In some alternative embodiments, as shown in fig. 6 and 7, the bottom wall surface of the connecting slot 503 is higher than the bottom wall surface of the second mounting slot 502, that is, the depth of the connecting slot 503 is smaller than the depth of the second mounting slot 502, so that the connecting slot 503 may also perform circumferential limitation on the permanent magnet 60.

In some alternative embodiments, as shown in fig. 6 and 7, the limiting plates 70 are plural, the connecting grooves 503 are plural, the plurality of connecting grooves 503 are arranged at intervals in the circumferential direction of the stator frame 10, the plurality of connecting grooves 503 and the plurality of second mounting grooves 502 are alternately arranged in the circumferential direction of the stator frame 10, and the plurality of limiting plates 70 are provided in the connecting grooves 503 in one-to-one correspondence.

Preferably, one connecting groove 503 is located between and communicates with two adjacent second mounting grooves 502, and one second mounting groove 502 is located between and communicates with two adjacent connecting grooves 503.

It will be appreciated that the plurality of permanent magnets 60 are arranged at intervals in the circumferential direction of the stator frame 10, the limiting plate 70 is provided between the two permanent magnets 60, and the installation is performed by using the gap between the two permanent magnets 60, without occupying additional space, thereby contributing to the reduction of the size of the motor.

In some alternative embodiments, the limiting plates 70 are plural, the connecting grooves 503 are plural, the plurality of connecting grooves 503 are arranged at intervals in the circumferential direction of the stator frame 10, the connecting grooves 503 are located at one side of the second mounting groove 502 in the radial direction of the stator frame 10, and the plurality of limiting plates 70 are provided in the connecting grooves 503 in a one-to-one correspondence.

It is understood that the connection groove 503 is located inside or outside the second mounting groove 502 in the radial direction of the stator frame 10. One connecting groove 503 can be simultaneously communicated with a plurality of second mounting grooves 502, namely, one limiting plate 70 is used for limiting a plurality of permanent magnets 60 at the same time, so that the number of limiting plates 70 can be reduced, assembly steps are reduced, and the processing efficiency is improved.

In some alternative embodiments, the limiting plate 70 is an annular plate, the connecting groove 503 is an annular groove, the limiting plate 70 and the connecting groove 503 each extend along the circumferential direction of the stator frame 10, and the connecting groove 503 is located at one side of the second mounting groove 502 in the radial direction of the stator frame 10. That is, the limiting plate 70 may be one, the connecting groove 503 is also one, the limiting plate 70 is an annular plate, the connecting groove 503 is an annular groove, and the second mounting groove 502 is located at the inner side or the outer side of the connecting groove 503, so that the assembly steps are further reduced, and the processing efficiency is improved.

In some embodiments, as shown in fig. 4 and 5, the axial-flux motor of the present embodiment further includes a housing 300, a rotor shaft 400, a first bearing 510, and a second bearing 520. The rotor disc 50 includes a second center hole 501, the rotor shaft 400 passes through the first center hole 102 and the second center hole 501, the first bearing 510 and the second bearing 520 are sleeved on the rotor shaft 400, and the first bearing 510 and the second bearing 520 are positioned in the first center hole 102, and the rotor shaft 400 and the two rotor discs 50 are fixedly connected, so that the rotor assembly 200 can drive the rotor shaft 400 to rotate.

The casing 300 includes a first end cap 310, a second end cap 320 and a surrounding shell 330, the first end cap 310 is provided with a through hole for the rotor shaft 400 to extend, the inner circumferential surface of the surrounding shell 330 is provided with a second annular protrusion 334 and an annular groove, a clamping ring 335 is arranged in the annular groove, the clamping ring 335 corresponds to the second annular protrusion 334, and the clamping ring 335 and the second annular protrusion 334 are respectively positioned at the left side and the right side of the stator assembly 100, so that the stator assembly 100 is positioned.

Specifically, the snap ring 335 is located on the left side of the stator assembly 100 and the second annular protrusion 334 is located on the right side of the stator assembly 100.

It will be appreciated that the axial air gap between the stator assembly 100 and the rotor assembly 200 is 2mm.

As shown in fig. 4 and 5, the enclosure 330 is provided with a water inlet hole 331 for mounting the water inlet pipe 341 and a water outlet hole 332 for mounting the water outlet pipe 342, the water inlet pipe 341 is communicated with the water inlet 1201, and the water outlet pipe 342 is communicated with the water outlet 1202. The enclosure 330 is further provided with a junction box 350, and the junction terminal 333 is located in the junction box 350 through the enclosure 330, so that the junction terminal 333 can be shielded.

In some embodiments, as shown in fig. 2 and 4, the wall surface of the first central hole 102 is provided with a first annular protrusion 1021, and the first bearing 510 and the second bearing 520 are located on both sides of the first annular protrusion 1021, respectively, so that the first annular protrusion 1021 plays a role in positioning the first bearing 510 and the second bearing 520.

As shown in fig. 4, the rotor shaft 400 is provided with a shaft shoulder 410, the rotor shaft 400 is also fixed with a bearing pressing plate 420, the shaft shoulder 410 is located at the left side of the first bearing 510, the bearing pressing plate 420 is located at the right side of the second bearing 520, the right end face of the bearing contacts with the inner ring of the first bearing 510, so that the positioning function is achieved on the first bearing 510, and the left end face of the bearing pressing plate 420 contacts with the inner ring of the second bearing 520, so that the positioning function is achieved on the second bearing 520.

Further, the shaft shoulder 410 is provided with a third annular protrusion 411, the rotor disc 50 is fixedly connected with the third annular protrusion 411, the bearing pressing plate 420 is provided with a fourth annular protrusion 421, and the rotor disc 50 is fixedly connected with the fourth annular protrusion 421.

In some embodiments, as shown in fig. 4, 6 and 7, the surface of the rotor disk 50 adjacent to the stator assembly 100 is provided with a circular groove 504, a plurality of second mounting grooves 502 surround the circular groove 504, and a second center hole 501 is provided on the bottom wall surface of the circular groove 504. The third annular protrusion 411 is disposed in the circular groove 504 of the rotor disk 50 of one rotor assembly 200, and the fourth annular protrusion 421 is disposed in the circular groove 504 of the rotor disk 50 of the other rotor assembly 200, so that the axial size of the motor can be reduced, thereby facilitating the improvement of the power of the motor.

As shown in fig. 4, a rotary transformer 600 is further provided on the rotor shaft 400, and the second end cap 320 is provided with a threading hole, so that a wire connected to the rotary transformer 600 passes through the threading hole to be out of the housing 300.

The vehicle of an embodiment of the invention comprises an axial flux electric machine of any of the embodiments described above.

In the description of the present invention, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., 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 invention. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (10)

1. A stator assembly, comprising:

the stator support is provided with a water inlet and a water outlet on the outer peripheral surface, a plurality of first mounting grooves are formed in the outer peripheral surface of the stator support, a circulating cooling channel is formed in the stator support, and the water inlet and the water outlet are communicated with the circulating cooling channel; and

the stator cores are wound with coils, and the stator cores are arranged in the first mounting grooves in a one-to-one correspondence mode.

2. The stator assembly of claim 1, wherein the stator frame has a first center hole, the circulating cooling channel includes a plurality of circulating channels and a plurality of circulating cavities, the circulating cavities are located at a side of the circulating channels adjacent to the first center hole, the plurality of circulating channels and the plurality of first mounting grooves are alternately arranged at intervals along a circumferential direction of the stator frame, the plurality of circulating cavities are isolated from each other and are arranged along the circumferential direction of the first center hole, and one circulating cavity is communicated with two adjacent circulating channels.

3. The stator assembly of claim 2 wherein one of the plurality of circulation channels includes a water inlet passage and a water outlet passage independent of each other, the water inlet passage communicating with the water inlet, the water outlet passage communicating with the water outlet, the water inlet passage communicating with one of the two adjacent circulation chambers, the water outlet passage communicating with the other of the two adjacent circulation chambers.

4. The stator assembly of claim 2, wherein the stator frame includes a baffle having an annular cavity disposed therein surrounding the first central bore, the baffle being disposed within the annular cavity and dividing the annular cavity into a plurality of the circulation cavities.

5. The stator assembly according to claim 4, wherein the baffle plate includes a partition plate, a plurality of first partition portions arranged at intervals in a circumferential direction of the stator frame on one side of the partition plate in an axial direction of the stator frame, and a plurality of second partition portions arranged at intervals in the circumferential direction of the stator frame on the other side of the partition plate in the axial direction of the center body, wherein the plurality of first partition portions and the plurality of second partition portions are alternately arranged in the circumferential direction of the stator frame.

6. An axial flux electric machine comprising a stator assembly and two rotor assemblies, the stator assembly being located between the two rotor assemblies in an axial direction of the stator frame, the stator assembly comprising a stator assembly according to any one of claims 1-5.

7. The axial flux machine of claim 6, wherein the rotor assembly includes a rotor disc, a plurality of permanent magnets, a plurality of second mounting grooves are provided on a surface of the rotor disc adjacent to the stator assembly, the plurality of second mounting grooves are arranged at intervals in a circumferential direction of the stator frame, the plurality of permanent magnets are provided in the second mounting grooves in one-to-one correspondence, and a dimension of the permanent magnets in an axial direction of the stator frame is smaller than or equal to a dimension of the second mounting grooves in the axial direction of the stator frame.

8. The axial flux machine of claim 7, wherein the rotor assembly further comprises a limiting plate, a connecting groove is formed in a surface of the rotor disc adjacent to the stator assembly, the connecting groove is communicated with at least one second mounting groove, the limiting plate is arranged in the connecting groove and connected with a bottom wall surface of the connecting groove, the limiting plate comprises a second limiting portion, the permanent magnet comprises a contact portion, the contact portion is located on one side, away from the stator assembly, of the second limiting portion in the axial direction of the stator support, the contact portion abuts against the second limiting portion, and the size of the limiting plate in the axial direction of the stator support is smaller than or equal to the size of the connecting groove in the axial direction of the stator support.

9. The axial flux machine of claim 8, wherein the plurality of limiting plates are provided, the plurality of connecting grooves are provided in plurality, the plurality of connecting grooves are arranged at intervals in the circumferential direction of the stator frame, the plurality of connecting grooves and the plurality of second mounting grooves are alternately arranged in the circumferential direction of the stator frame, and the plurality of limiting plates are provided in the connecting grooves in one-to-one correspondence; or,

the plurality of limiting plates are arranged, the plurality of connecting grooves are arranged at intervals in the circumferential direction of the stator support, the connecting grooves are positioned on one side of the second mounting groove in the radial direction of the stator support, and the plurality of limiting plates are arranged in the connecting grooves in a one-to-one correspondence manner; or,

the limiting plate is an annular plate, the connecting groove is an annular groove, the limiting plate and the connecting groove extend along the circumferential direction of the stator support, and the connecting groove is located at one side of the second mounting groove in the radial direction of the stator support.

10. A vehicle characterized by comprising an axial flux electric machine according to any one of claims 6-9.