CN114337013A - Oil-cooled motors and vehicles - Google Patents

Abstract

The invention provides an oil-cooled motor and a vehicle, wherein the oil-cooled motor comprises: a casing, a stator assembly, a rotor assembly and a cooling system; a mounting cavity is arranged in the casing, the stator assembly is sleeved on the outer side of the rotor assembly, and Both the stator assembly and the rotor assembly are arranged in the installation cavity; the cooling system includes an oil supply assembly and a first cooling oil circuit; the first cooling oil circuit includes a spray pipe, and the spray pipe is arranged on the top of the casing and is located outside the stator assembly , used to spray cooling oil to the outside of the stator assembly; the output end of the oil supply assembly is connected to the spray pipe. The first cooling oil circuit can spray cooling oil to the outside of the stator assembly. On the basis of dissipating heat to the stator assembly, the effective cooling of the oil-cooled motor is realized, the working efficiency of the oil-cooled motor is improved, and additional settings for The cooling water jacket structure reduces the overall size of the oil-cooled motor and effectively controls the quality and production cost of the oil-cooled motor.

Description

Oil-cooled motors and vehicles

technical field

The invention relates to the technical field of motors, and in particular, to an oil-cooled motor and a vehicle.

Background technique

In the related art, the drive motors used in the gearboxes of pure electric vehicles or some hybrid vehicles are all water-cooled motors, but such drive motors need to adopt a water jacket structure, so that the coolant circulates in the water jacket, which cannot be directly cooled and dissipated. The effect is poor, the motor efficiency is low, and the forward weight and production cost of the motor are increased.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

To this end, a first aspect of the present invention provides an oil-cooled motor.

A second aspect of the present invention provides a vehicle.

In view of this, according to the first aspect of the embodiments of the present application, an oil-cooled motor is proposed, including:

housings, stator assemblies, rotor assemblies and cooling systems;

An installation cavity is arranged in the casing, the stator assembly is sleeved on the outer side of the rotor assembly, and both the stator assembly and the rotor assembly are arranged in the installation cavity;

The cooling system includes an oil supply assembly and a first cooling oil circuit;

The first cooling oil circuit includes a spray pipe, and the spray pipe is arranged on the top of the casing and located outside the stator assembly, and is used for spraying cooling oil to the outside of the stator assembly;

The output end of the oil supply assembly is connected with the spray pipe.

In a feasible embodiment, the first cooling oil circuit further includes:

The first casing oil passage is arranged in the casing, and both ends of the first casing oil passage are respectively connected to the output end of the oil supply assembly and the spray pipe;

Wherein, the spray pipe is arranged along the axial direction of the stator assembly, and the pipe wall of the spray pipe is provided with a plurality of spray holes, and the spray holes face the outside of the stator assembly.

In a feasible implementation manner, the spray pipeline includes a plurality of spray branches arranged at intervals, and each spray branch is provided with a plurality of spray holes at intervals.

In a feasible embodiment, the spray pipe is a U-shaped pipe, and the U-shaped pipe includes a first longitudinal pipe section, a second longitudinal pipe section and a transverse pipe section;

Both the first longitudinal pipe section and the second longitudinal pipe section are connected with the oil passage of the first casing, and the transverse pipe section is located between the first longitudinal pipe section and the second longitudinal pipe section;

Both the first longitudinal pipe section and the second longitudinal pipe section are arranged along the axial direction of the stator assembly;

Wherein, the first vertical pipe section and the second vertical pipe section are provided with a plurality of spray holes at intervals, and the horizontal pipe section is provided with at least one spray hole.

In a feasible implementation manner, the oil-cooled motor further includes:

The rotating shaft is arranged on the casing;

Rotor assembly includes:

The rotor body is sleeved on the rotating shaft;

The rotor outer hub is sleeved on the rotating shaft and connected with the rotor body, and the rotor outer hub includes a first part located on one side of the rotor body and a second part penetrated through the rotor body;

a rotor front support plate, which is connected with the second part of the rotor outer hub and is located on the other side of the rotor body;

Wherein, the cooling system further includes a second cooling oil circuit for cooling the rotor assembly, and the second cooling oil circuit includes:

The second casing oil passage is arranged in the casing, and the second casing oil passage is connected with the output end of the oil supply assembly;

The rotating shaft oil passage is arranged on the rotating shaft, and the rotating shaft oil passage is connected with the oil passage of the second casing;

The rotor oil cavity is arranged between the front support plate of the rotor and the outer hub of the rotor, and the rotor oil cavity is communicated with the oil passage of the rotating shaft.

In a feasible embodiment, the second cooling oil circuit includes:

The square oil groove is arranged between the rotor body and the second part of the rotor outer hub, and the square oil groove is communicated with the rotor oil cavity;

Wherein, the square oil groove runs through the rotor body along the axial direction of the rotor body, and the second cooling oil passage is also used for spraying cooling oil to the inner side of the stator assembly.

In a feasible implementation manner, the number of square oil grooves is multiple, and the plurality of square oil grooves are evenly arranged along the circumferential direction of the rotor body.

In a feasible embodiment, the cooling system further includes:

The third cooling oil circuit is used to spray cooling oil to the outside of the stator assembly, and the third cooling oil circuit includes:

The third casing oil passage is arranged on the casing, and the third casing oil passage is connected with the output end of the oil supply assembly;

a plurality of first oil holes, the first oil holes are connected with the oil passage of the third casing and are located at the top of the casing, and the plurality of first oil holes are symmetrically arranged on both sides of the spray pipe along the circumferential direction of the stator assembly;

a plurality of second oil holes, the second oil holes are connected with the oil passage of the third casing and are located at the top of the casing, and the plurality of second oil holes are symmetrically arranged on both sides of the spray pipe along the circumferential direction of the stator assembly;

Wherein, the first oil hole and the second oil hole are respectively located at two ends of the stator assembly.

In a feasible implementation manner, the inner bottom of the installation cavity is filled with cooling oil according to a preset oil filling height;

Wherein, the preset oil filling height is greater than or equal to the minimum distance between the outer side wall of the stator assembly and the inner bottom wall of the casing, and less than or equal to the minimum distance between the inner side wall of the stator assembly and the inner bottom wall of the casing.

According to a second aspect of the embodiments of the present application, a vehicle is provided, including:

The oil-cooled motor as proposed in any one of the above-mentioned first aspects.

Compared with the prior art, the present invention at least includes the following beneficial effects: the oil-cooled motor provided by the present invention includes: a casing, a stator assembly, a rotor assembly and a cooling system; an installation cavity is arranged in the casing, and the stator assembly is sleeved on the rotor assembly The outer side of the cooling system includes an oil supply assembly and a first cooling oil circuit; the first cooling oil circuit includes a spray pipe, and the spray pipe is arranged on the top of the casing and located in the The outer side of the stator assembly is used for spraying cooling oil to the outer side of the stator assembly; the output end of the oil supply assembly is connected with the spray pipe. By arranging the spray pipe of the first cooling oil circuit on the top of the casing of the oil-cooled motor and on the outside of the stator assembly, the first cooling oil circuit can spray the cooling oil to the outside of the stator assembly, and spray the cooling oil to the outer side of the stator assembly. The cooling oil will flow along the outer surface of the stator assembly to the bottom of the casing under the action of gravity, so that the cooling oil will absorb the heat of the stator assembly and other components that are connected with the stator assembly, thereby realizing the oil-cooled motor. Effective cooling improves the working efficiency of the oil-cooled motor. In addition, through the arrangement of the first cooling oil circuit, it is possible to realize the cooling of the motor stator assembly while avoiding additionally disposing a water jacket structure for cooling, thereby reducing the overall size of the oil-cooled motor and reducing the overall size of the oil-cooled motor. The box quality and production cost are effectively controlled.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of exemplary embodiments. The drawings are for the purpose of illustrating exemplary embodiments only and are not to be considered limiting of the present application. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

FIG. 1 is a schematic structural diagram of a first angle of an oil-cooled motor according to an embodiment of the present application;

2 is a second perspective schematic structural diagram of an oil-cooled motor according to an embodiment of the present application;

Fig. 3 is the partial enlarged schematic diagram of A area in Fig. 1;

FIG. 4 is a schematic structural diagram of a spray pipe of an oil-cooled motor according to an embodiment of the present application.

Wherein, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 4 is:

10 Oil-cooled motor;

100 shell; 200 stator assembly; 300 rotor assembly; 400 cooling system; 500 shaft;

110 fixing bolt; 120 mounting cavity; 310 rotor body; 320 rotor outer hub; 330 rotor front support plate; 410 oil supply assembly; 420 first cooling oil circuit; 430 second cooling oil circuit; 440 third cooling oil circuit; 510 The first bearing; 520 second bearing;

421 first housing oil passage; 422 spray pipe; 431 second housing oil passage; 432 shaft oil passage; 433 rotor oil chamber; 434 square oil groove; 441 first oil hole;

4221 first vertical pipe section; 4222 second vertical pipe section; 4223 horizontal pipe section; 4224 spray holes.

Detailed ways

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary 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 by the embodiments set forth herein. Rather, these embodiments are provided so that the application will be more thoroughly understood, and will fully convey the scope of the application to those skilled in the art.

As shown in FIGS. 1 to 4 , the embodiments of the present application propose an oil-cooled motor 10 , which includes: a casing 100 , a stator assembly 200 , a rotor assembly 300 and a cooling system 400 ; the casing 100 is provided with an installation cavity 120 , The stator assembly 200 is sleeved on the outside of the rotor assembly 300, and the stator assembly 200 and the rotor assembly 300 are both disposed in the installation cavity 120; the cooling system 400 includes an oil supply assembly 410 and a first cooling oil circuit 420; the first cooling oil circuit 420 Including a spray pipe 422, the spray pipe 422 is arranged on the top of the casing 100 and is located outside the stator assembly 200, and is used to spray cooling oil to the outside of the stator assembly 200; the output end of the oil supply assembly 410 and the spray pipe 422 connected.

As shown in FIG. 1 , the oil-cooled motor 10 provided in the embodiment of the present application includes a housing 100 , and an installation cavity 120 is provided inside the housing 100 , and the installation cavity 120 provides installation space for the stator assembly 200 and the rotor assembly 300 of the oil-cooled motor 10 . , and protect the stator assembly 200 and the rotor assembly 300 from the impact of the external structure of the casing 100 , which can prolong the service life of the stator assembly 200 and the rotor assembly 300 and reduce the maintenance cost of the oil-cooled motor 10 . The stator assembly 200 is sleeved on the outside of the rotor assembly 300 , and both the stator assembly 200 and the rotor assembly 300 are disposed inside the installation cavity 120 .

The dotted line with arrows in FIG. 1 schematically shows the flow path of the cooling oil. The cooling system 400 of the oil-cooled motor 10 includes an oil supply assembly 410 and a spray pipe 422 , and the output end of the oil supply assembly 410 and the spray pipe 422 is connected to provide cooling oil for the spray pipe 422 . By arranging the spray pipe 422 of the first cooling oil circuit 420 on the top of the housing 100 of the oil-cooled motor 10 and outside the stator assembly 200 , the cooling oil can be sprayed to the outside of the stator assembly 200 and onto the stator assembly The cooling oil of 200 will flow along the outer surface of the stator assembly 200 toward the bottom of the casing 100 under the action of gravity, so that the cooling oil will absorb the heat of the stator assembly 200 and other components that are connected with the stator assembly 200, and then Effective cooling of the oil-cooled motor 10 is achieved, and the working efficiency of the oil-cooled motor 10 is improved.

In addition, through the arrangement of the first cooling oil passage 420, it is possible to achieve cooling of the motor stator assembly 200 while avoiding additionally providing a water jacket structure for cooling, thereby reducing the overall size of the oil-cooled motor 10 and reducing the need for oil-cooled motor 10. The quality of the whole box and the production cost of the motor 10 are effectively controlled.

As shown in FIG. 1 , in some feasible examples, the casing 100 further includes fixing bolts 110 , and the stator assembly 200 is connected to the casing 100 through the fixing bolts 110 .

In some feasible examples, the oil supply assembly 410 includes an oil tank and an oil pump, the output end of the oil pump is connected with the spray pipeline, the input end of the oil pump is connected with the oil tank, and the oil tank contains the cooling oil.

In some feasible examples, the oil tank may be a gearbox of a vehicle, the oil cavity of the gearbox is filled with gearbox oil, the output end of the oil pump and the oil cavity of the gearbox are connected through an oil delivery pipeline, and the oil delivery pipeline is provided with oil Cooler to regulate the temperature of the transmission oil. It can be understood that the gearbox of the vehicle is usually filled with gearbox oil, and the gearbox oil can be used to ensure the normal operation of the gearbox and prolong the service life of the transmission mechanism inside the gearbox. The temperature of the transmission oil can be adjusted to a temperature suitable for the cooling of the motor by the oil cooler, and the transmission oil can be supplied to the spray pipe of the first cooling flow path by the oil pump.

At the same time, the transmission oil will flow into the installation cavity 120 after cooling the outside of the stator assembly 200 , and a circulating pipeline connecting the installation cavity 120 and the oil cavity of the transmission can be further arranged to transport the transmission oil in the installation cavity 120 . to the oil chamber of the gearbox, and reuse it for the gearbox. Therefore, by using the transmission oil of the gearbox to cool the oil-cooled motor 10 , an additional oil tank can be omitted, the overall volume of the cooling system 400 can be reduced, and the structural compactness of the oil-cooled motor 10 can be improved.

In some possible embodiments, the stator assembly 200 includes a stator core and windings disposed on the stator core.

As shown in FIG. 1 , in some examples, the first cooling oil circuit 420 further includes:

The first casing oil passage 421 is provided in the casing 100, and both ends of the first casing oil passage 421 are respectively connected to the output end of the oil supply assembly 410 and the spray pipe 422;

The spray pipe 422 is arranged along the axial direction of the stator assembly 200 , and the pipe wall of the spray pipe 422 is provided with a plurality of spray holes 4224 , and the spray holes 4224 face the outside of the stator assembly 200 .

As shown in FIG. 1 , the first cooling oil passage 420 further includes a first casing oil passage 421 , the first casing oil passage 421 is disposed in the casing 100 , and two ends of the first casing oil passage 421 are respectively connected with the supply The output end of the oil assembly 410 is connected with the spray pipe 422, so that through the first casing oil passage 421 provided on the casing 100, while the output end of the oil supply assembly 410 is connected with the spray pipe 422, The structural compactness of the oil-cooled motor 10 is also improved, which is beneficial to control the volume of the whole box of the oil-cooled motor 10 .

In addition, the spray pipe 422 is arranged along the axial direction of the stator assembly 200, and a plurality of spray holes 4224 are arranged on the pipe wall of the spray pipe 422. The spray holes 4224 face the outside of the stator assembly 200, so that the spray holes 4224 can be used The shower hole 4224 sprays the cooling oil to the outside of the stator assembly 200 along the axial direction of the stator assembly 200, which increases the spraying range to the outside of the stator assembly 200, and can more uniformly spray the stator assembly 200, especially the stator assembly 200 close to the stator assembly 200. The outer surface of the top of the casing 100 conducts heat dissipation, which further improves the heat dissipation effect on the motor and is beneficial to improve the working efficiency of the motor.

In some examples, the spray pipe 422 includes a plurality of spray branches arranged at intervals, and each spray branch is provided with a plurality of spray holes 4224 at intervals.

The spray pipe 422 includes a plurality of spray branches arranged at intervals, and each spray branch is provided with a plurality of spray holes 4224 at intervals, thereby improving the circumferential spray of the spray pipe 422 relative to the stator assembly 200 . The outer surface of the stator assembly 200 close to the top of the casing 100 can directly receive more cooling oil, thereby improving the cooling effect of the stator assembly 200 and other components connected to the stator assembly 200 .

As shown in FIG. 2 and FIG. 4 , in some examples, the spray pipe 422 is a U-shaped pipe, and the U-shaped pipe includes a first longitudinal pipe section 4221 , a second longitudinal pipe section 4222 and a transverse pipe section 4223 ;

The first longitudinal pipe section 4221 and the second longitudinal pipe section 4222 are both connected to the first casing oil passage 421, and the transverse pipe section 4223 is located between the first longitudinal pipe section 4221 and the second longitudinal pipe section 4222;

The first longitudinal tube section 4221 and the second longitudinal tube section 4222 are both arranged along the axial direction of the stator assembly 200;

The first vertical pipe section 4221 and the second vertical pipe section 4222 are provided with a plurality of spray holes 4224 at intervals, and the horizontal pipe section 4223 is provided with at least one spray hole 4224 .

As shown in FIG. 4 , the spray pipe 422 is a U-shaped pipe, and the U-shaped pipe includes a first vertical pipe section 4221 , a second vertical pipe section 4222 and a horizontal pipe section 4223 . It is easy to understand with reference to FIG. 2 , in the spray pipe 422 in the form of a U-shaped pipe, its transverse pipe section 4223 is close to one end of the stator assembly 200 , and the corresponding open ends of the first longitudinal pipe section 4221 and the second longitudinal pipe section 4222 are close to the stator assembly 200 . the other end of the . The first longitudinal pipe section 4221 and the second longitudinal pipe section 4222 are connected with the first housing oil passage 421, so that the spray pipe 422 in the form of a U-shaped pipe can receive the cooling oil provided by the oil supply assembly 410, and the first longitudinal pipe section 422 The pipe section 4221 and the second longitudinal pipe section 4222 are provided with a plurality of spray holes 4224 at intervals, so that cooling oil can be sprayed to the stator assembly 200 along the axial direction of the stator assembly 200, and the first longitudinal pipe section 4221 and the second longitudinal pipe section 4221 and the second longitudinal pipe section 4221 can be used to spray cooling oil. The interval between the vertical pipe sections 4222 increases the spraying range for the stator assembly 200 , improves the cooling effect on the stator assembly 200 , and further improves the overall heat dissipation effect of the oil-cooled motor 10 , which is beneficial to improve the work of the oil-cooled motor 10 . efficiency.

It can be understood that, as the cooling oil flows along the first longitudinal pipe section 4221 and the second longitudinal pipe section 4222 and continuously flows out of the U-shaped pipe through the spray holes 4224 provided along the way, the cooling oil flow near the horizontal pipe section 4223 will be slightly lower, and the cooling oil passing through the first longitudinal pipe section 4221 and the cooling oil passing through the second longitudinal pipe section 4222 are likely to form a hedge at the position of the transverse pipe section 4223 . By arranging at least one spray hole 4224 on the horizontal pipe section 4223, while ensuring that the cooling oil is sprayed out of the spray pipe smoothly, the spray amount to the side of the stator assembly 200 away from the open end of the U-shaped pipe can be further increased, ensuring that the More uniform cooling is performed on the outer surface of the stator assembly 200 near the top of the housing 100 , thereby providing further guarantee for the heat dissipation effect of the oil-cooled motor 10 .

In some feasible examples, as shown in FIG. 4 , when the spray pipe 422 is a U-shaped pipe, the transverse pipe section 4223 is disposed close to the first end of the stator assembly 200 , the first longitudinal pipe section 4221 and the second longitudinal pipe section The open end of the 4222 is disposed close to the second end of the stator assembly 200, and the first end and the second end are opposite ends of the stator assembly 200 along its axial direction; The longitudinal pipe section 4221 and the second longitudinal pipe section 4222 are respectively provided with at least one spray hole 4224 on one side close to the transverse pipe section 4223; the first longitudinal pipe section 4221 and the second longitudinal pipe section 4222 are respectively provided with at least one spray hole corresponding to the second end hole 4224; at least one spray hole 4224 is respectively provided in the first longitudinal pipe section 4221 and the second longitudinal pipe section 4222 corresponding to the middle position between the first end and the second end. Therefore, the spray pipe 422 can spray and cool the outer surface of the stator assembly 200 near the top of the casing 100 more uniformly along the axis of the stator assembly 200 , which is beneficial to further improve the heat dissipation effect of the oil-cooled motor 10 .

As shown in FIGS. 1 and 3 , in some examples, the oil-cooled motor 10 further includes:

The rotating shaft 500 is arranged on the casing 100;

Rotor assembly 300 includes:

The rotor body 310 is sleeved on the rotating shaft 500;

The rotor outer hub 320 is sleeved on the rotating shaft 500 and connected to the rotor body 310. The rotor outer hub 320 includes a first part located on one side of the rotor body 310 and a second part passing through the rotor body 310;

The rotor front support plate 330 is connected with the second part of the rotor outer hub 320 and is located on the other side of the rotor body 310;

The cooling system 400 further includes a second cooling oil circuit 430 for cooling the rotor assembly 300, and the second cooling oil circuit 430 includes:

The second casing oil passage 431 is provided in the casing 100, and the second casing oil passage 431 is connected with the output end of the oil supply assembly 410;

The rotating shaft oil passage 432 is arranged on the rotating shaft 500, and the rotating shaft oil passage 432 is connected with the second housing oil passage 431;

The rotor oil cavity 433 is disposed between the rotor front support plate 330 and the rotor outer hub 320 , and the rotor oil cavity 433 communicates with the shaft oil passage 432 .

As shown in FIG. 1 , the oil-cooled motor 10 further includes a rotating shaft 500 disposed in the housing 100 , and the rotor assembly 300 includes a rotor body 310 , a rotor outer hub 320 and a rotor front support plate 330 . The rotor body 310 is sleeved on the rotating shaft 500 , the rotor outer hub 320 is sleeved on the rotating shaft 500 and connected to the rotor body 310 , and the rotor outer hub 320 includes a first part and a second part, and the first part is located on one side of the rotor body 310 , the second part is penetrated through the rotor body 310 , the rotor front support plate 330 is connected with the second part of the rotor outer hub 320 and is located on the other side of the rotor body 310 .

As shown in FIGS. 1 and 3 , the cooling system 400 further includes a second cooling oil circuit 430 , and the second cooling oil circuit 430 can cool the rotor assembly 300 , thereby further improving the heat dissipation effect of the oil-cooled motor 10 . The second cooling oil passage 430 includes a second housing oil passage 431 provided on the housing 100 , a rotating shaft oil passage 432 provided on the rotating shaft 500 , and a rotor oil cavity 433 provided between the rotor front support plate 330 and the rotor outer hub 320 . . The second casing oil passage 431 is connected to the output end of the oil supply assembly 410 , the rotating shaft oil passage 432 is connected to the second casing oil passage 431 , and the rotor oil cavity 433 is communicated with the rotating shaft oil passage 432 .

Therefore, the cooling oil output from the oil supply assembly 410 can flow into the rotor oil cavity 433 through the second housing oil passage 431 and the rotating shaft oil passage 432, and on the one hand, the cooling oil in the rotor oil cavity 433 can be used to conduct heat transfer to the rotor oil cavity 433. The rotor assembly 300 dissipates heat, and on the other hand, the cooling oil can also dissipate heat from the casing 100 and the rotating shaft 500 during the process of the cooling oil passing through the second casing oil passage 431 and the rotating shaft oil passage 432 , thereby further improving the oil-cooled motor 10 The heat dissipation effect is good, which is beneficial to improve the working efficiency of the oil-cooled motor 10 . In addition, the arrangement of the second cooling oil passage 430 relies on the structure of the housing 100 , the rotating shaft 500 and the rotor assembly 300 of the oil-cooled motor 10 , and there is no need to add too many structural components, thereby improving the structural compactness of the oil-cooled motor 10 , and effectively control the overall quality and production cost of the oil-cooled motor 10 .

At the same time, the second cooling oil circuit 430 cooperates with the first cooling oil circuit 420 to conduct targeted heat dissipation to the outer side of the stator assembly 200 and the rotor assembly 300 in the installation cavity 120 respectively, which can significantly improve the heat dissipation efficiency of the oil-cooled motor 10 and cooling oil utilization.

In some feasible examples, the housing 100 further includes a first bearing 510 and a second bearing 520 , the outer ring of the first bearing 510 and the outer ring of the second bearing 520 are arranged on the housing 100 at intervals, and the first bearing 510 The inner ring of the second bearing 520 and the inner ring of the second bearing 520 are sleeved on the rotating shaft 500 at intervals, so as to form a good support for the rotating shaft 500 and provide a good rotating environment for the rotating shaft 500 .

As shown in FIG. 3, in some examples, the second cooling oil circuit 430 includes:

The square oil groove 434 is arranged between the rotor body 310 and the second part of the rotor outer hub 320, and the square oil groove 434 is communicated with the rotor oil cavity 433;

The square oil groove 434 penetrates the rotor body 310 along the axial direction of the rotor body 310 , and the second cooling oil passage 430 is also used for spraying cooling oil to the inner side of the stator assembly 200 .

As shown in FIG. 3 , the dashed line with arrows in FIG. 3 schematically shows the flow direction of the cooling oil. A square oil groove 434 is disposed between the rotor body 310 and the second part of the rotor outer hub 320 , and the rotor oil chamber 433 communicates with the square oil groove 434 , so that when the rotor assembly 300 rotates, the cooling oil in the rotor oil chamber 433 will be removed. It is thrown into the square oil groove 434 under the action of centrifugal force. The square oil groove 434 is arranged through the rotor body 310 along the axial direction of the rotor body 310 , and since the rotor assembly 300 is located inside the stator assembly 200 , the cooling oil will overflow from the openings at both ends of the square oil groove and be thrown towards the stator under the action of centrifugal force The inner side of the assembly 200 realizes spray cooling of the inner side of the stator assembly 200, and then the second cooling oil circuit 430 can be used to cool and dissipate heat to the inner side of the stator assembly 200 while cooling the rotor assembly 300, which further improves the cooling effect. The scope of action of the system 400 improves the heat dissipation effect of the oil-cooled motor 10 .

At the same time, the above arrangement of the second cooling oil circuit 430 can cooperate with the first cooling oil circuit 420 to further expand the spray cooling range of the stator assembly 200 , so that the cooling of the stator assembly 200 is more uniform and efficient.

In some examples, the number of the square oil grooves 434 is plural, and the plurality of square oil grooves 434 are evenly arranged along the circumferential direction of the rotor body 310 .

By arranging a plurality of square oil grooves 434 evenly arranged along the circumferential direction of the rotor body 310 , during the rotation of the rotor assembly 300 , more cooling oil can be thrown out of the rotor assembly 300 by the centrifugal force generated by the rotor assembly 300 , and more cooling oil can be thrown out of the rotor assembly 300 . The cooling oil is evenly sprayed to the inner side of the stator assembly 200 , thereby further improving the heat dissipation uniformity and heat dissipation efficiency of the inner side of the stator assembly 200 .

In some feasible embodiments, the number of square oil grooves 434 may be 2, 4, 6, 8 or 10. Wherein, when the number of square oil grooves 434 is 8, the rotor assembly 300 can be well cooled while the inner side of the stator assembly 200 is well cooled, and the overall structural strength of the rotor assembly 300 can be ensured, which is beneficial to ensure the reliability and stability of the rotor assembly 300 .

As shown in FIG. 2, in some examples, cooling system 400 further includes:

The third cooling oil passage 440 is used for spraying cooling oil to the outside of the stator assembly 200 , and the third cooling oil passage 440 includes:

The third casing oil passage is arranged in the casing 100, and the third casing oil passage is connected with the output end of the oil supply assembly 410;

A plurality of first oil holes 441 , the first oil holes 441 are connected with the oil passage of the third casing and are located at the top of the casing 100 , and the plurality of first oil holes 441 are symmetrically arranged in the spray pipe along the circumferential direction of the stator assembly 200 422 on both sides;

A plurality of second oil holes, the second oil holes are connected with the oil passage of the third casing and are located at the top of the casing 100 , and the plurality of second oil holes are symmetrically arranged on two sides of the spray pipe 422 along the circumferential direction of the stator assembly 200 . side;

The first oil hole 441 and the second oil hole are located at two ends of the stator assembly 200 respectively.

As shown in FIG. 2 , the cooling system 400 further includes a third cooling oil passage 440 , and the third cooling oil passage 440 includes a third housing oil passage, a plurality of first oil holes 441 and a plurality of second oil holes. The third casing oil passage is provided in the casing 100, and the third casing oil passage is connected to the output end of the oil supply assembly 410, and the first oil hole 441 and the second oil hole are both connected to the third casing oil passage Therefore, the cooling oil output from the oil supply assembly 410 can be smoothly supplied to the first oil hole 441 and the second oil hole, and the cooling oil is sprayed on the outer surface of the stator assembly 200 through the first oil hole 441 and the second oil hole.

The first oil hole 441 and the second oil hole are both arranged on the top of the casing 100 and symmetrically arranged on both sides of the spray pipe 422 along the circumferential direction of the stator assembly 200 . At the same time, the first oil hole 441 and the second oil hole are located at both ends of the stator assembly 200, so that the third cooling oil circuit 440 can be used to further increase the spraying range of the outer surface of the stator assembly 200 close to the top of the casing 100, and the axial sides of the stator assembly 200 The effective spray cooling improves the heat dissipation effect on the stator assembly 200 , thereby further reducing the temperature of the oil-cooled motor 10 during operation, and improving the working efficiency of the oil-cooled motor 10 .

In some feasible examples, the number of the first oil holes 441 is 2, 4, 6 or 8, and the number of the second oil holes is equal to the number of the first oil holes 441 .

As shown in FIG. 2 , in some examples, the inner bottom of the installation cavity 120 is filled with cooling oil according to a preset oil filling height;

Wherein, the preset oil injection height is greater than or equal to the minimum distance between the outer side wall of the stator assembly 200 and the inner bottom wall of the casing 100 , and is less than or equal to the minimum distance between the inner side wall of the stator assembly 200 and the inner bottom wall of the casing 100 .

Fig. 2 schematically shows a feasible preset oil injection height H. Among the two dashed lines in Fig. 2, the upper dashed line represents the air gap interface, and the relatively lower dashed line represents the air gap interface. The tangential plane of the connection surface between the outer side wall of the stator assembly 200 and the inner bottom wall of the casing 100 located at the bottom of the casing 100, the tangent plane and the air gap interface are both perpendicular to the height direction of the casing 100, and the distance between the two imaginary lines can be viewed as is the minimum distance between the inner side wall of the stator assembly 200 and the inner bottom wall of the housing 100 .

By injecting cooling oil at the inner bottom of the installation cavity 120 according to the preset oil injection height H, continuous oil immersion cooling can be performed on the side of the stator assembly 200 close to the bottom of the casing 100 , and the side of the stator assembly 200 close to the bottom of the casing 100 can be continuously cooled by oil immersion. The temperature of the stator can be effectively controlled, and the cooling system 400 can be used to implement more comprehensive heat dissipation to the stator assembly 200 . The preset oil filling height is greater than or equal to the minimum distance between the outer side wall of the stator assembly 200 and the inner bottom wall of the casing 100, and is less than or equal to the minimum distance between the inner side wall of the stator assembly 200 and the inner bottom wall of the casing 100, so that On the one hand, it can ensure that at least part of the stator assembly 200 near the bottom of the casing 100 can be immersed in the cooling oil for cooling, and on the other hand, it can also prevent the cooling oil from entering the air gap between the stator assembly 200 and the rotor assembly 300, which can greatly reduce the risk of cooling oil. To a certain extent, the cooling oil is prevented from generating resistance to the rotation of the rotor assembly 300 , and the churning loss of the rotor assembly 300 is reduced, which is beneficial to ensure the working efficiency of the oil-cooled motor 10 .

According to a second aspect of the embodiments of the present application, a vehicle is provided, including:

The oil-cooled motor 10 as proposed in any one of the above-mentioned first aspects.

Since the vehicle includes the oil-cooled motor 10 provided by any one of the above-mentioned embodiments of the first aspect, for ease of reading, the details of the foregoing embodiments of the oil-cooled motor 10 are not repeated in this vehicle embodiment, but should be It is clear that the vehicle in the embodiment of the present application can correspondingly implement all the contents of the foregoing embodiment of the oil-cooled motor 10 . It can be further stated that in the case where the vehicle includes the oil-cooled motor 10 provided by any one of the embodiments of the first aspect, since the oil-cooled motor 10 has good heat dissipation effect and working efficiency, the operating efficiency of the vehicle is improved. It can also be greatly improved, so that efficient operation can be achieved and the total vehicle mileage can be significantly increased.

In the present invention, the terms "first", "second" and "third" are only used for the purpose of description, and cannot be construed as indicating or implying relative importance; the term "multiple" refers to two or two above, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be It is directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientations shown in the accompanying drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or unit must have a specific direction, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

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

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. an oil-cooled motor, is characterized in that, comprises: housings, stator assemblies, rotor assemblies and cooling systems; An installation cavity is arranged in the housing, the stator assembly is sleeved on the outer side of the rotor assembly, and both the stator assembly and the rotor assembly are arranged in the installation cavity; The cooling system includes an oil supply assembly and a first cooling oil circuit; The first cooling oil circuit includes a spray pipe, and the spray pipe is arranged on the top of the casing and located outside the stator assembly, and is used for spraying cooling oil to the outside of the stator assembly; The output end of the oil supply assembly is connected with the spray pipe. 2. The oil-cooled motor according to claim 1, wherein the first cooling oil circuit further comprises: a first casing oil passage, which is arranged in the casing, and two ends of the first casing oil passage are respectively connected to the output end of the oil supply assembly and the spray pipe; Wherein, the spray pipe is arranged along the axial direction of the stator assembly, and the pipe wall of the spray pipe is provided with a plurality of spray holes, and the spray holes face the outside of the stator assembly. 3. The oil-cooled motor according to claim 2, characterized in that, The spray pipeline includes a plurality of spray branches arranged at intervals, and each of the spray branches is provided with a plurality of the spray holes at intervals. 4. The oil-cooled motor according to claim 2, characterized in that, The spray pipe is a U-shaped pipe, and the U-shaped pipe includes a first vertical pipe section, a second vertical pipe section and a horizontal pipe section; The first longitudinal pipe section and the second longitudinal pipe section are both connected to the first casing oil passage, and the transverse pipe section is located between the first longitudinal pipe section and the second longitudinal pipe section; Both the first longitudinal pipe section and the second longitudinal pipe section are arranged along the axial direction of the stator assembly; Wherein, the first vertical pipe section and the second vertical pipe section are provided with a plurality of the spray holes at intervals, and the horizontal pipe section is provided with at least one of the spray holes. 5. The oil-cooled motor according to claim 1, further comprising: a rotating shaft, arranged on the casing; The rotor assembly includes: a rotor body, sleeved on the rotating shaft; a rotor outer hub, sleeved on the rotating shaft and connected with the rotor body, the rotor outer hub includes a first part located on one side of the rotor body and a second part penetrated through the rotor body; a rotor front support plate, connected with the second part of the rotor outer hub and located on the other side of the rotor body; Wherein, the cooling system further includes a second cooling oil circuit for cooling the rotor assembly, and the second cooling oil circuit includes: A second casing oil passage is provided in the casing, and the second casing oil passage is connected with the output end of the oil supply assembly; A rotating shaft oil passage is arranged on the rotating shaft, and the rotating shaft oil passage is connected with the second housing oil passage; The rotor oil cavity is arranged between the rotor front support plate and the rotor outer hub, and the rotor oil cavity is communicated with the rotating shaft oil passage. 6. The oil-cooled motor according to claim 5, wherein the second cooling oil circuit comprises: A square oil groove is arranged between the rotor body and the second part of the rotor outer hub, and the square oil groove is communicated with the rotor oil cavity; Wherein, the square oil groove runs through the rotor body along the axial direction of the rotor body, and the second cooling oil passage is also used for spraying the cooling oil to the inner side of the stator assembly. 7. The oil-cooled motor according to claim 6, characterized in that, The number of the square oil grooves is multiple, and the plurality of square oil grooves are evenly arranged along the circumferential direction of the rotor body. 8. The oil-cooled motor according to any one of claims 1 to 7, wherein the cooling system further comprises: The third cooling oil circuit is used for spraying the cooling oil to the outside of the stator assembly, and the third cooling oil circuit includes: A third casing oil passage is provided in the casing, and the third casing oil passage is connected with the output end of the oil supply assembly; a plurality of first oil holes, the first oil holes are connected with the oil passage of the third casing and are located at the top of the casing, and the plurality of first oil holes are symmetrical along the circumferential direction of the stator assembly arranged on both sides of the spray pipe; a plurality of second oil holes, the second oil holes are connected with the oil passage of the third casing and are located at the top of the casing, and the plurality of second oil holes are symmetrical along the circumferential direction of the stator assembly arranged on both sides of the spray pipe; Wherein, the first oil hole and the second oil hole are located at two ends of the stator assembly, respectively. 9. The oil-cooled motor according to any one of claims 1 to 7, characterized in that: The inner bottom of the installation cavity is filled with the cooling oil according to the preset oil filling height; Wherein, the preset oil filling height is greater than or equal to the minimum distance between the outer side wall of the stator assembly and the inner bottom wall of the casing, and is less than or equal to the distance between the inner side wall of the stator assembly and the inner bottom wall of the casing minimum distance between. 10. A vehicle comprising: The oil-cooled motor according to any one of claims 1 to 9.

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