CN213367539U

CN213367539U - Water channel structure of motor for electric automobile, machine shell and motor

Info

Publication number: CN213367539U
Application number: CN202022562493.1U
Authority: CN
Inventors: 吴发亮; 孔庆波; 卢冰原
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Current assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Priority date: 2020-11-07
Filing date: 2020-11-07
Publication date: 2021-06-04
Anticipated expiration: 2030-11-07

Abstract

The application relates to a water channel structure, a machine shell and a motor of a motor for an electric automobile. The water channel structure of the motor for the electric automobile comprises a water channel loop formed by ribs arranged on an inner shell of the motor, wherein the water channel loop is matched with an outer shell of the motor to form the water channel structure; wherein the waterway loop comprises: a water inlet end, a water outlet end, a spiral channel and a reciprocating channel; the water channel loop is arranged from the water inlet end to the water outlet end along the circumferential surface of the motor inner shell; the spiral channel is arranged between the water inlet end and the water outlet end and extends spirally on the circumferential surface; the round-trip channel is arranged on the circumferential surface and is provided with a flow channel turning-back part; the spiral channel is in communication with the shuttle channel. The technical scheme that this application provided can effectively increase the water area, reduces the flow resistance, improves motor heat dispersion, also can realize low flow resistance and high heat dissipation nature.

Description

Water channel structure of motor for electric automobile, machine shell and motor

Technical Field

The application relates to the technical field of electric automobiles, in particular to a water channel structure of a motor for an electric automobile, a shell and the motor.

Background

The power density of the driving motor of the electric automobile is higher and higher, so higher requirements are also put forward on the heat dissipation performance of the motor.

In the related art, water passages of motors such as liquid-cooled motors are classified into reciprocating water passages and spiral water passages. The reciprocating water channel has a large number of reciprocating times, so that the flow resistance of the water channel is high, the requirement on the power of the water pump is high, two ends of the shell corresponding to the reciprocating water channel structure need to be plugged by adopting an additional process, the cost is additionally increased, the leakage risk is caused, and the heat dissipation effect of the reciprocating water channel is better than that of a common spiral water channel. Wherein, the casing that spiral water course corresponds adopts low pressure casting usually, and the casing inside and outside wall is thicker, and casing weight is heavy, leads to the spiral number of turns of water course few, the water course area of crossing water to be less because of technological characteristics, and water course axial length accounts for the casing total length less for heat-sinking capability is less.

Therefore, the water channel structure design of the motor in the related art has some defects and needs to be improved.

SUMMERY OF THE UTILITY MODEL

For solving or partly solve the problem that exists among the correlation technique, this application provides a water course structure, casing and motor of motor for electric automobile, can realize low flow resistance and high heat dissipation.

The application first aspect provides a water course structure of motor for electric automobile:

the water channel structure comprises a water channel loop formed by ribs arranged on an inner shell of the motor, and the water channel loop is matched with an outer shell of the motor to form the water channel structure;

wherein the waterway loop comprises: a water inlet end, a water outlet end, a spiral channel and a reciprocating channel;

the water channel loop is arranged from the water inlet end to the water outlet end along the circumferential surface of the motor inner shell;

the spiral channel is arranged between the water inlet end and the water outlet end and extends spirally on the circumferential surface;

the round-trip channel is arranged on the circumferential surface and is provided with a flow channel turning-back part;

the spiral channel is in communication with the shuttle channel.

In one embodiment, the water inlet end and/or the water outlet end is connected with the spiral channel; alternatively, the first and second electrodes may be,

the water inlet end and/or the water outlet end are/is connected with the reciprocating channel.

In one embodiment, the water inlet end is provided with two water inlets, and the spiral channel forms a double-spiral structure; the reciprocating channel is provided with two water inlets and two water outlets corresponding to the spiral channel; or the like, or, alternatively,

the water inlet end is provided with a water inlet, and the spiral channel forms a single spiral structure; the round-trip channel is provided with a water inlet and a water outlet corresponding to the spiral channel.

In one embodiment, the number of spiral channels is two, and the number of round-trip channels is one or more.

In one embodiment, the reciprocating channel is positioned in the middle of the peripheral surface of the inner shell, and two ends of the reciprocating channel are respectively communicated with the spiral channel; or the like, or, alternatively,

the reciprocating channel is positioned on one side of the circumferential surface of the inner shell, and one end of the reciprocating channel is communicated with the spiral channel.

In one embodiment, the flow passage turn-back portion has a bell mouth shape with one end smaller and the other end larger; and/or the presence of a gas in the gas,

the protruding length of the rib at the flow channel turn-back part is gradually shortened along the direction from the inflow to the outflow.

The second aspect of the present application provides a housing of a motor for an electric vehicle:

comprises an inner shell and an outer shell;

the two ends of the inner shell are hermetically connected with the outer shell;

the water channel structure is characterized in that ribs are arranged between the inner shell and the outer shell at intervals, the ribs are arranged on the inner shell to form a water channel loop, and the water channel loop is matched with the outer shell to form the water channel structure.

In one embodiment, the ribs are provided on the outer peripheral wall of the inner shell.

In one embodiment, the housing includes a first wall portion having a cylindrical shape and an end cap provided at one end thereof, the housing further including an opening;

the inner shell comprises a cylindrical third wall part and a flange plate arranged at one end of the third wall part;

the flange plate is fixedly connected with the shell;

two ends of the periphery of the third wall part are respectively provided with a sealing ring; and a sealing ring is arranged on the end face of the other end of the inner shell far away from the flange plate.

The third aspect of the present application provides a motor for an electric vehicle:

the motor shell comprises the motor shell for the electric automobile and further comprises a rotor and a stator which are arranged in the motor shell.

The technical scheme provided by the application can comprise the following beneficial effects:

the application provides a water channel structure of a motor for an electric automobile, which comprises a water channel loop formed by ribs arranged on an inner shell of the motor, wherein the water channel loop is matched with an outer shell of the motor to form the water channel structure; wherein the waterway loop comprises: a water inlet end, a water outlet end, a spiral channel and a reciprocating channel; the spiral channel is arranged between the water inlet end and the water outlet end and extends spirally on the circumferential surface; the round-trip channel is arranged on the circumferential surface and is provided with a flow channel turning-back part; the spiral channel is in communication with the shuttle channel. Compared with the prior art, the technical scheme of the application adopts a spiral and reciprocating composite structure, and compared with the defect that the flow resistance of a water channel of a simple reciprocating water channel in the prior art is very large, the scheme of the application utilizes a spiral channel to ensure that the flow resistance is low; for the weak shortcoming of heat-sinking capability of simple spiral water course among the correlation technique, the scheme of this application has utilized to come and go the passageway for the heat-sinking capability has been improved, consequently the technical scheme of this application adopts spiral + comes and goes composite construction, makes the water course can realize low flow resistance and high heat dissipation. Also this application scheme utilizes spiral channel and comes and goes the passageway to combine, has both overcome the defect that adopts simple formula water course to come and go to exist among the correlation technique, has also overcome the defect that adopts simple spiral water course to exist among the correlation technique, when guaranteeing the water passing area, has the effect of lower flow resistance and high heat dissipating.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

FIG. 1 is a schematic view of a labyrinth waterway structure shown in an embodiment of the present application;

FIG. 2 is a schematic diagram of an exploded enclosure according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a housing according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of another embodiment of the enclosure;

FIG. 5 is a schematic view illustrating a water flow direction of a labyrinth waterway according to an embodiment of the present application;

fig. 6 is a schematic view of another labyrinth waterway structure shown in the embodiment of the present application.

Detailed Description

Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The water channel in the related technology adopts a simple reciprocating water channel structure, has the defect of large flow resistance of the water channel, and adopts a simple spiral water channel, has the defects of small water channel area and weak heat dissipation capability. To above-mentioned problem, the application provides a water course, casing and motor of motor for electric automobile, can realize low flow resistance and high heat dissipating.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

The water channel of the embodiment of the present application is similar to a labyrinth, and may also be referred to as a labyrinth water channel, and the following description will be referred to as a labyrinth water channel as an example.

Fig. 1 is a schematic view of a labyrinth waterway structure shown in an embodiment of the present application.

Referring to fig. 1, a labyrinth water channel 100 of a motor for an electric vehicle includes a water channel loop formed by ribs disposed on an inner casing of the motor, wherein the water channel loop is matched with an outer casing of the motor to form the labyrinth water channel 100; wherein, the water course return circuit includes: comprises a water inlet end 1, a water outlet end 2, a spiral channel 3 and a reciprocating channel 4. From the water inlet end 1 to the water outlet end 2, the water channel loop of the labyrinth water channel 100 is integrally arranged along the circumferential surface of the motor inner shell; the spiral channel 3 is arranged between the water inlet end 1 and the water outlet end 2 and extends spirally on the peripheral surface; a shuttle passage 4 provided on the circumferential surface and having a flow path turning portion 401; the spiral channel 3 communicates with the shuttle channel 4. Wherein, the water inlet end 1 and/or the water outlet end 2 are connected with the spiral channel 3; alternatively, the water inlet end 1 and/or the water outlet end 2 are connected to the shuttle channel 4.

The term "communicate" means that a fluid can flow between the two. The positions of the water inlet end 1 and the water outlet end 2 are only illustrative and not restrictive. In this embodiment, the spiral channel 3 and the shuttle channel 4 are segmented on the whole flow channel according to the water flow condition, that is, on the whole flow channel, if the water flow advances according to one of a left spiral or a right spiral, after the water flow advances to a certain position, the water flow does not continue to advance according to the original spiral direction, and turns back to flow at the position, and finally flows out from the flow channel, the spiral channel 3 and the shuttle channel 4 are understood to be provided. In the present embodiment, referring to fig. 1, the water flow first travels through the spiral channel 3 in the left spiral direction, and when it travels to the turning portion 401, it does not travel in the original left spiral manner, at which time the water flow turns back, and finally travels in the right spiral manner until the water is discharged from the water outlet end 2, so that before the turning portion 401, it can be understood as having a first spiral channel, and after the turning portion 401, it can be understood as having a second spiral channel, and the portion between the first spiral channel and the second spiral channel can be understood as the round-trip channel 4. It can be seen that, in this application scheme, the water course can be spiral in the global both ends (both sides) trend of motor inner shell, and the general flow resistance of spiral water course is lower, has designed a return circuit that comes and goes in the centre that the motor inner shell is global also in the middle of the water course, can increase the water passing area, and it is better to come and go the general thermal diffusivity of return circuit, has consequently makeed the water course to compromise two kinds of advantages of low flow resistance and high thermal diffusivity.

Of course, it is understood that if the first spiral channel and the second spiral channel are connected to the turn-back portion 401 through connecting channels with other shapes, the connecting channels and the turn-back portion between the first spiral channel and the second spiral channel together constitute the shuttle channel 4 in the present application.

In the present application, the water inlet end 1 and/or the water outlet end 2 are/is connected to the spiral channel 3; alternatively, the water inlet end 1 and/or the water outlet end 2 are connected to the shuttle channel 4, which can achieve the purpose of the present application. Therefore, in the present application, the spiral channel 3 may be a single spiral channel or a plurality of spiral channels arranged at intervals, for example, several spiral channels 3 are arranged at intervals through the shuttle channel 4. When the number of the spiral channels 3 is greater than 1, the spiral channels 3 may have the same spiral direction, such as both left-handed spirals or both right-handed spirals, or may have different spiral directions, such as one part of the left-handed spiral and the other part of the right-handed spiral.

Compared with the prior art, the technical scheme of the application adopts a spiral and reciprocating composite structure, and compared with the defect that the flow resistance of a water channel of a simple reciprocating water channel in the prior art is very large, the scheme of the application utilizes a spiral channel to ensure that the flow resistance is low; compared with the defect that the heat dissipation capacity of a pure spiral water channel in the related technology is weak, the scheme of the application utilizes the reciprocating channel, so that the heat dissipation capacity is improved. Therefore, the technical scheme of the application adopts the spiral and round-trip composite structure, so that the water channel can realize low flow resistance and high heat dissipation performance, namely the spiral channel is combined with the round-trip channel, the defect of the simple round-trip water channel in the related technology is overcome, the defect of the simple spiral water channel in the related technology is overcome, and the water passing area is ensured, and meanwhile, the effects of low flow resistance and high heat dissipation performance are realized.

Referring to fig. 1, further, the water inlet end 1 may be provided with two

water inlets

101, 102, but is not limited thereto, and the first spiral channel 30 forms a double spiral structure, and the two

water inlets

101, 102 correspond to the two water inlets of the first spiral channel 30. The shuttle channel 4 is provided with two water inlets 301 and two water outlets 302 corresponding to the first spiral channel 30. After the return channel 4 turns back, the cooling water enters the second spiral channel 31, finally joins the water outlet end 2 and is discharged.

In other embodiments, the water inlet end 1 may also be provided with a water inlet, so that the spiral channel 3 forms a single spiral structure, and the round channel 4 is provided with a water inlet and a water outlet corresponding to the spiral channel 3.

In the present embodiment, referring to fig. 1, the folded portion 401 in the flow path has a bell mouth shape with one end smaller and the other end larger. This is because the cooling water flowing in from the first spiral passage 30 is divided into two flows, and two flows are discharged after being folded back, so that 4 flows are arranged side by side (two flows in and two flows out) near the folded-back portion 401, and the flow of the water flowing into the folded-back portion 401 and the flow of the water flowing out of the folded-back portion 401 do not form a large-angle turn near the folded-back portion 401, thereby reducing the flow resistance of the cooling water.

Referring to fig. 1, in a preferred structure, the inlet of the cooling water flowing in from the first spiral passage 30 is not flush, and the outlet of the cooling water flowing out after being folded back is not flush. That is, the length of the bead in the middle turn-back portion 401 of the traverse channel 4, i.e., the length of the bead, gradually decreases from the inflow direction to the outflow direction. By performing simulation optimization on the reinforcing ribs arranged at the reciprocating position, namely the region of the turn-back part 401, the extending length of the reinforcing ribs of the water channel at the bending part, namely the reciprocating channel 4, is gradually shortened from the direction of inflow to the direction of outflow (see fig. 1 and 5 at the same time). Specifically, in the region of the folded portion 401, the inlet port is closer to the tip end of the folded portion 401 from the right to the left with respect to the outlet port, and the first opening is the highest and the second opening is the second, and the two inlet ports 301 and the two outlet ports 302 are arranged in such a manner that the openings thereof substantially constitute a slope. Through this design for the rivers transition is better, and what form is the laminar flow and can not form chaotic torrent, has obvious optimization to the heat is taken away to the water course.

FIG. 2 is a schematic diagram of an exploded enclosure according to an embodiment of the present application; FIG. 3 is a schematic cross-sectional view of a housing according to an embodiment of the present disclosure; FIG. 4 is a schematic cross-sectional view of another embodiment of the enclosure; fig. 5 is a schematic view illustrating a water flow direction of a labyrinth waterway according to an embodiment of the present application.

Referring to fig. 2 to 5, on the other hand, the present application provides a casing 20 of a motor for an electric vehicle, which includes an inner casing 201 and an outer casing 202, two ends of the inner casing 201 are connected to the outer casing 202 in a sealing manner, for example, by a sealing ring 5, ribs 2011 are arranged between the inner casing 201 and the outer casing 202 at intervals, and the ribs 2011 serve as reinforcing ribs. The ribs 2011 are arranged on the inner shell 201 to form a water channel loop, and the water channel loop and the outer shell 202 are matched and separated to form the labyrinth water channel 100. The inner and outer casings, namely the inner casing 201 and the outer casing 202, are mutually matched, and the water channel sealing is realized by the sealing ring 5 in the axial direction and the radial direction of the casing 20.

Specifically, ribs 2011 are provided on the outer peripheral wall of the inner case 201. In a preferred embodiment, the ribs 2011 and the inner shell 201 may be integrally molded, and have a thickness of about 6mm and a height of about 6 mm. The distance between adjacent ribs 2011 is about 15mm, that is, the axial width of a single water passing channel is about 15 mm. It should be noted that the above-mentioned spacing is only illustrative and not limited thereto. The water passage loop is formed by the ribs 2011 of the inner shell 201, and the labyrinth water passage 100 in the previous embodiment is formed after the outer shell 202 is matched. That is, the casing 20 of the motor is designed with the water passage loop by the reinforcing ribs of the inner casing 201, and forms the labyrinth water passage 100 of the casing 20 after being matched with the outer casing 202. The labyrinth water passage 100 may be a right spiral passage at the initial stage, the right spiral passage extends to the turn-back portion 401 to communicate with the shuttle passage 4, and the tail end of the shuttle passage 4 communicates with a left spiral passage. It will be appreciated that the ribs 2011 extend circumferentially on the outer wall of the inner housing 201 to form a helix, corresponding to the helical channels 3.

The housing 202 includes a cylindrical first wall portion 2023 and an end cap 2024 provided at one end thereof, and the housing 202 further includes an opening 2025; the inner case 201 includes a cylindrical third wall 2012 and a flange 2013 provided at one end thereof; the flange 2013 is connected, e.g., fixedly connected, to the housing 202; two ends of the periphery of the third wall part 2012 are respectively provided with a seal ring 5; the end face of the other end of the inner shell 201, which is far away from the flange 2013, is also provided with a sealing ring 5.

Wherein, sealing washer 5 can be for having elastic O shape circle, makes to realize axial and radial ascending sealed between inner shell 201 and the shell 202 through setting up O shape circle to can solve sealed problem than better.

The housing 202 and the end cap 2024 may be integrally formed by casting, for example, by high pressure casting, and a plurality of ribs are disposed on the outer peripheral wall of the housing 202, for example, an annular rib is disposed on the outer peripheral wall of the housing 202, and the thickness of the rib is about 6mm and the height of the rib is about 6 mm. The outer shell 202 is provided with a cold water inlet 2021 and a hot water outlet 2022. It should be noted that the positions of the cold water inlet 2021 and the hot water outlet 2022 are only for illustration and not limited thereto. After the outer shell 202 and the inner shell 201 are assembled, a closed space is formed between the outer shell 202 and the inner shell 201, the closed space is partitioned by the plurality of ribs 2011 on the inner shell 201 to form the labyrinth water channel 100, namely, a water channel loop is formed by the reinforcing ribs of the inner shell 201, the labyrinth water channel 100 of the casing 20 is formed after the outer shell 202 is matched, and the labyrinth water channel 100 is defined by the self structures of the inner shell 201 and the outer shell 202.

The "water" referred to in the present application may be a coolant for a cooling motor, and is typically an aqueous solution of ethylene glycol, for example.

It can be seen that, the technical scheme that this application provided, the water course area of crossing water (or convection heat transfer area) is very big, and the separation muscle of water course also is the rib 2011 on the periphery wall of inner shell 201 thinner, so the proportion that water course axial length accounts for the casing total length is also very high. The heat radiation effect is good because the heat convection area is large and the ratio of the axial size of the water channel to the size of the shell is large. In addition, because the water channel is formed by matching the inner shell and the outer shell, the shell has thinner wall thickness and lighter weight compared with a cast shell of a simple reciprocating type or spiral water channel. Because the casing wall is thin and light, the weight of the casing is reduced by more than 2kg compared with the casing of a simple reciprocating or spiral water channel. In addition, the flow resistance is small, so that the power consumption of the whole water pump can be reduced.

Referring to fig. 5, the direction indicated by the arrow in fig. 5 is a water flow direction, and when the water flow reaches the turning portion 401, the water flow changes the original forward direction due to the blocking effect of the turning portion 401, and flows out from the spiral passage 3 after turning back.

According to the water channel structure, the water channels with various forms can be formed by means of the matching of different reinforcing ribs on the inner shell of the machine shell and the outer shell, for example, the water channels can be changed into full-spiral channels without reciprocating, one reciprocating channel can be increased into multiple reciprocating channels, the reciprocating position of the reciprocating channel can be arranged in the middle of the peripheral surface of the inner shell and changed into one reciprocating position on two sides of the peripheral surface of the inner shell, and for example, the deformation scheme of reciprocating on the left side is shown in fig. 6.

Referring to fig. 6, which shows a labyrinth waterway structure according to still another embodiment of the present application, the shuttle passage may be located at an initial section of the entire flow passage, i.e., at one side of the circumferential surface of the inner casing. Similarly, it is only necessary to provide corresponding ribs on the motor casing to form a water channel loop, and to form the labyrinth water channel structure in cooperation with the casing, which is not shown in the drawings.

Alternatively, in other embodiments, the shuttle channel may be disposed at both ends of the entire flow channel, with a spiral channel in the middle; further alternatively, in this flow channel, a plurality of spiral channels and a plurality of shuttle channels are provided at intervals as long as the layout of the flow channel is not affected. These non-illustrated embodiments are not intended to be limiting outside the present application, as any of the principles of the present application may be used in conjunction with a spiral channel in conjunction with a shuttle channel.

In conclusion, according to the scheme of the application, a double-shell split structure of an inner shell and an outer shell is adopted, the shell and the outer shell are split to form a spiral and reciprocating labyrinth type water channel, the water channels are blocked by reinforcing ribs, and the appearance looks like a labyrinth shape. The application provides a compound labyrinth water course, the spiral number of turns of water course is many, and the water course is crossed the water area and is very big, and water course axial length accounts for the casing total length very high, and the flow resistance is lower moreover, shows heat dispersion excellence through fluid simulation, has consequently compromise two kinds of advantages of low flow resistance and high heat dispersion.

In a further aspect, in correspondence with the labyrinth waterway structure and the housing, the present application further provides an electric motor for an electric vehicle, which includes the housing in any one of the embodiments, and further includes a rotor and a stator (not shown) installed in the housing, and the rotor and the stator are installed in the housing of the electric vehicle, and can be implemented by using the related technical means in the field, and will not be described in detail herein. When this application scheme was applied to the motor, the weight of motor casing can be controlled effectively, effective control manufacturing cost.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. The utility model provides a water course structure of motor for electric automobile which characterized in that:

the spiral channel is in communication with the shuttle channel.

2. The waterway structure of a motor for an electric vehicle according to claim 1, wherein:

the water inlet end and/or the water outlet end are/is connected with the spiral channel; alternatively, the first and second electrodes may be,

3. The waterway structure of a motor for an electric vehicle according to claim 1, wherein:

the water inlet end is provided with two water inlets, and the spiral channel forms a double-spiral structure; the reciprocating channel is provided with two water inlets and two water outlets corresponding to the spiral channel; or the like, or, alternatively,

4. The waterway structure of a motor for an electric vehicle according to claim 1, wherein:

the number of the spiral channels is two, and the number of the round-trip channels is one or more.

5. The waterway structure of a motor for an electric vehicle according to claim 1, wherein:

the reciprocating channel is positioned in the middle of the peripheral surface of the inner shell, and two ends of the reciprocating channel are respectively communicated with the spiral channel; or the like, or, alternatively,

6. The waterway structure of a motor for an electric vehicle according to claim 1, wherein:

the flow channel turning-back part is in a bell mouth shape with one smaller end and the other larger end; and/or the presence of a gas in the gas,

7. The utility model provides a casing of motor for electric automobile which characterized in that:

comprises an inner shell and an outer shell;

ribs are arranged between the inner shell and the outer shell at intervals, the ribs are arranged on the inner shell to form a water channel loop, and the water channel loop and the outer shell are matched to form the water channel structure according to any one of claims 1 to 6.

8. The motor housing for an electric vehicle according to claim 7, characterized in that:

the rib sets up on the periphery wall of inner shell.

9. The motor housing for an electric vehicle according to claim 8, characterized in that:

the shell comprises a first cylindrical wall part and an end cover arranged at one end of the first cylindrical wall part, and the shell also comprises an opening;

the flange plate is fixedly connected with the shell;

10. A motor for an electric vehicle, characterized in that:

a casing comprising the motor for an electric vehicle as claimed in any one of claims 7 to 9, further comprising a rotor and a stator mounted within the casing.