CN217656483U - Motor structure and electric drive system - Google Patents

Abstract

The application provides a motor structure and electric drive system relates to electric automobile technical field. The motor structure includes: a housing assembly having an accommodation cavity and an oil inlet configured to communicate with the accommodation cavity; and the outer edge of the stator assembly is provided with a cooling channel, and the outer edge of the stator assembly is attached to the accommodating cavity so that the cooling oil flowing from the oil inlet flows through the cooling channel. The shell assembly is provided with and holds chamber and oil inlet, and stator module sets up in holding the intracavity, and stator module has cooling channel, and cooling channel and oil inlet intercommunication for enter into the cooling oil that holds the intracavity from the oil inlet, cooling channel can flow through, and then form the cooling to stator module, be favorable to the cooling of motor structure, and simple structure can reduce the input of cost.

Description

Motor structure and electric drive system

Technical Field

The application relates to the technical field of electric automobiles, in particular to a motor structure and an electric drive system.

Background

Along with the development process of automobiles, the mainstream automobile type at present is changed into a new energy electric automobile from a traditional fuel vehicle, and an electric drive system is also changed into a drive motor, a motor controller and a speed reducer from an engine and a gearbox. With the rapid development of new energy automobiles, new problems are continuously emerging, the requirements on the working environment of a driving motor are more and more strict, and the problem of high-temperature heating is easily caused.

In the related art, the driving motor is generally cooled by using an oil pipe or an oil guide plate, but the driving motor is increased in weight and cost and has a complicated structure.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a motor structure and an electric drive system, which are beneficial to cooling of a device, simple in structure and capable of reducing the investment of cost.

In order to achieve the purpose, the following technical scheme is adopted in the application:

in a first aspect, the present application provides a motor structure comprising: a housing assembly having a receiving cavity and an oil inlet configured to communicate with the receiving cavity; and the outer edge of the stator assembly is provided with a cooling channel, and the outer edge of the stator assembly is attached to the accommodating cavity so that the cooling oil flowing from the oil inlet flows through the cooling channel.

At the in-process of above-mentioned realization, housing assembly is provided with and holds chamber and oil inlet, and stator module sets up in holding the intracavity, and stator module has cooling channel, cooling channel and oil inlet intercommunication for enter into the cooling oil that holds the intracavity from the oil inlet, cooling channel can flow through, and then form the cooling to stator module, be favorable to the cooling of motor structure, and simple structure, can reduce the input of cost.

In some embodiments, the stator assembly includes a stator body and a stator core, the stator core is disposed at an outer edge of the stator body, and the cooling channel is disposed at a side of the stator core facing away from the stator body.

At the in-process of above-mentioned realization, stator core and stator body are connected, and are provided with cooling channel on the stator core, can cool off stator core and stator body through cooling channel, can improve the cooling effect.

In some embodiments, the number of the cooling channels is provided, and the plurality of the cooling channels are distributed at intervals along the left and right directions of the stator assembly, so that the contact area of the cooling oil is increased, and the cooling effect of the cooling oil is further improved.

In some embodiments, communication is provided between adjacent two of the cooling passages.

In some embodiments, the stator core includes a first punching sheet, a second punching sheet, and a third punching sheet, the first punching sheet is disposed at the outermost side, the second punching sheet is disposed between the first punching sheet and the third punching sheet, and an outer diameter of the second punching sheet is smaller than an outer diameter of the first punching sheet and/or an outer diameter of the third punching sheet, so that the first punching sheet, the second punching sheet, and the third punching sheet enclose to form the cooling channel.

In the process of realizing, the first punching sheet, the second punching sheet and the third punching sheet are assembled to form a cooling channel in a surrounding manner, so that parts can be reduced, the weight and cost can be reduced, and meanwhile, the flow resistance of cooling oil is large, and the heat dissipation effect can be improved.

In some embodiments, the inner edge of the first stamped sheet is provided with a first mating groove, the inner edge of the second stamped sheet is provided with a second mating groove, the inner edge of the third stamped sheet is provided with a third mating groove, and the first mating groove, the second mating groove and the third mating groove correspond to each other one to one for penetrating at least a part of the structure of the stator body.

At the in-process of above-mentioned realization, first towards the piece be provided with first cooperation groove, the second is provided with second cooperation groove and third towards the piece be provided with third cooperation groove towards the piece, and first cooperation groove, second cooperation groove and third cooperation groove correspond the setting, and are used for wearing to establish of stator body, can realize being connected of stator core and stator body, also are favorable to the flow of coolant oil simultaneously, make things convenient for the coolant oil to cool off stator module.

In some embodiments, the periphery of the first stamped steel is provided with an oil injection hole, and the oil injection hole is configured to be communicated with the cooling channel, so that cooling oil can flow to the outer side of the stator assembly from the cooling channel, the overall cooling effect is further improved, and the overall heat dissipation effect is balanced.

In some embodiments, the third punching sheet is provided with an oil passing hole, and the outer edge of the second punching sheet is provided with a protrusion, so that when the cooling oil flows through the cooling channel, the cooling oil enters the oil passing hole through the protrusion to form communication between two adjacent cooling channels.

At the in-process of above-mentioned realization, the outer fringe of second towards the piece is provided with the arch, and the third is provided with the oilhole, when cooling oil flows through cooling channel, can separate the fender through bellied for at least partly from the oilhole of passing of cooling oil passes through, and then realizes two adjacent cooling channel's intercommunication, realizes whole radiating effect's equilibrium.

In some embodiments, an oil outlet is further configured on the housing assembly, and the oil outlet is configured to communicate with the accommodating cavity so as to discharge the cooling oil in the accommodating cavity.

In some embodiments, the electric machine structure further includes a rotor assembly disposed within the receiving cavity and rotating relative to the stator assembly.

In some embodiments, the rotor assembly includes a rotor body and a bearing, the rotor body is connected with the housing assembly through the bearing, and at least a portion of the cooling oil flowing through the cooling channel flows to the outside of the stator assembly and cools the rotor body and the bearing.

In a second aspect, the present application further provides an electric drive system, comprising: a motor structure as claimed in any one of the preceding claims.

The electric drive system provided in the embodiment of the second aspect of the present application includes the motor structure described in the technical solution of the first aspect, so that all technical effects of the embodiments are achieved, and details are not repeated here.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for a user of ordinary skill in the art, other related drawings can be obtained according to the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a motor structure disclosed in an embodiment of the present application.

Fig. 2 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is a sectional view of B-B of fig. 1.

Fig. 4 is a schematic structural diagram of a stator assembly of an electric machine structure disclosed in an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a first stamped sheet, a second stamped sheet and a third stamped sheet of a motor structure disclosed in an embodiment of the application.

Reference numerals

10. A housing assembly; 11. an oil inlet; 12. an oil inlet channel; 13. an oil outlet; 14. an oil outlet channel; 20. a stator assembly; 21. a stator body; 22. a stator core; 221. a first punching sheet; 2211. an oil spray hole; 222. a second punching sheet; 2221. a protrusion; 223. a third punching sheet; 2231. an oil passing hole; 224. a first mating groove; 225. a second mating groove; 226. a third mating groove; 227. a cooling channel; 30. a rotor assembly; 31. a rotor body; 32. and a bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a user of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case to a user of ordinary skill in the art.

Examples

With the gradual development of new energy automobile driving motors towards high power density and high torque density, the heat load of the driving motors is higher and higher, and the heat dissipation performance is also called as a challenge, so that an efficient cooling scheme is urgently needed to meet the high-performance requirement of the driving motors, the cooling forms of the driving motors mainly comprise air cooling, liquid cooling, oil cooling and the like, and the oil cooling effect is optimal.

Currently, cooling of oil cooling is mainly represented by the Japanese system and the American system, oil pipe spraying, oil pipe or stator oil duct + oil guide plate oil through cooling is usually adopted, the oil pipe or the oil guide plate needs to be arranged, the weight and the cost of the motor are increased, and the structure is complex.

In view of this, as shown in fig. 1-3, in a first aspect, the present application provides a motor structure applicable in an electric drive system, the motor structure comprising: the stator assembly 20 is disposed inside the casing assembly 10, and the stator assembly 20 is provided with a cooling channel 227, so that cooling oil entering the casing assembly 10 can enter the cooling channel 227, thereby cooling the entire structure.

Specifically, the housing assembly 10 has an accommodating cavity and an oil inlet 11, wherein the oil inlet 11 is configured to communicate with the accommodating cavity; and a stator assembly 20, the outer edge of which is provided with a cooling channel 227, and the outer edge of the stator assembly 20 is attached to the accommodating cavity, so that the cooling oil flowing from the oil inlet 11 flows through the cooling channel 227.

For example, the oil inlet 11 may be disposed at an upper end of the housing assembly 10, a specific position of the oil inlet is not particularly limited, the housing assembly 10 may be provided with an oil inlet channel 12, the oil inlet channel 12 is communicated with the oil inlet 11, and cooling oil entering from the oil inlet 11 enters the accommodating cavity through the oil inlet channel 12 and then flows into the cooling channel 227, wherein a length of the oil inlet channel 12 may be set according to an actual situation, which is not described herein.

It should be noted that the cooling passage 227 may be disposed in an annular shape, and the cooling passage 227 is recessed with respect to the stator assembly 20, so as to accommodate cooling oil; the stator assembly 20 has no welding bead and is fixedly connected by gluing or riveting, wherein the stator assembly 20 and the inner wall of the shell assembly 10 can adopt interference fit.

In the process of the above implementation, the housing assembly 10 is provided with the accommodating cavity and the oil inlet 11, the stator assembly 20 is disposed in the accommodating cavity, the stator assembly 20 has the cooling channel 227, the cooling channel 227 is communicated with the oil inlet 11, so that the cooling oil entering the accommodating cavity from the oil inlet 11 can flow through the cooling channel 227, and further the stator assembly 20 is cooled, which is beneficial to cooling the motor structure, and has a simple structure, and the investment of cost can be reduced.

As shown in fig. 4, fig. 4 is a schematic structural diagram of a stator assembly 20 of a motor structure disclosed in an embodiment of the present application, the stator assembly 20 includes a stator body 21 and a stator core 22, the stator body 21 and the stator core 22 can be both configured into a ring shape, the stator body 21 and the stator core 22 can adopt an interference fit, an outer edge of the stator core 22 is attached to the housing assembly 10, the stator core 22 is disposed at an outer edge of the stator body 21, and one side of the stator core 22, which deviates from the stator body 21, is provided with the cooling channel 227.

In the above implementation process, the stator core 22 is connected to the stator body 21, and the cooling channel 227 is provided on the stator core 22, so that the stator core 22 and the stator body 21 can be cooled by the cooling channel 227, and the cooling effect can be improved.

Referring to fig. 2 to 4, the plurality of cooling passages 227 are disposed, the plurality of cooling passages 227 are distributed at intervals along the left and right direction of the stator assembly 20, and two adjacent cooling passages 227 are communicated with each other, so that a contact area of cooling oil is increased, and a cooling effect of the cooling oil is further increased.

As shown in fig. 5, fig. 5 is a schematic structural diagram of a first stamped piece 221, a second stamped piece 222, and a third stamped piece 223 of a motor structure disclosed in an embodiment of the present application, where the stator core 22 includes the first stamped piece 221, the second stamped piece 222, and the third stamped piece 223, the first stamped piece 221 is disposed on the outermost side, the second stamped piece 222 is disposed between the first stamped piece 221 and the third stamped piece 223, and an outer diameter of the second stamped piece 222 is smaller than an outer diameter of the first stamped piece 221 and/or an outer diameter of the third stamped piece 223, so that the first stamped piece 221, the second stamped piece 222, and the third stamped piece 223 enclose to form the cooling channel 227.

It can be understood that at least two first punching pieces 221 are provided, at least one second punching piece 222 and at least one third punching piece 223 are provided, and the number of the first punching pieces 221, the number of the second punching pieces 222 and the number of the third punching pieces 223 can be set according to an actual situation.

In the implementation process, the first punching sheet 221, the second punching sheet 222 and the third punching sheet 223 are assembled to form the cooling channel 227 in a surrounding manner, so that the number of parts can be reduced, the weight and cost can be reduced, and meanwhile, the flow resistance of cooling oil is large, and the heat dissipation effect can be improved.

Referring to fig. 5, a first mating groove 224 is disposed on an inner edge of the first stamped piece 221, a second mating groove 225 is disposed on an inner edge of the second stamped piece 222, and a third mating groove 226 is disposed on an inner edge of the third stamped piece 223, the first mating groove 224, the second mating groove 225, and the third mating groove 226 are in one-to-one correspondence, so as to be used for penetrating at least a part of the structure of the stator body 21, and form an interference fit with the stator body 21 through the first mating groove 224, the second mating groove 225, and the third mating groove 226.

In the process of the above implementation, the first punching sheet 221 is provided with the first matching groove 224, the second punching sheet 222 is provided with the second matching groove 225 and the third punching sheet 223 is provided with the third matching groove 226, the first matching groove 224, the second matching groove 225 and the third matching groove 226 are correspondingly arranged, and the stator body 21 is arranged in a penetrating manner, so that the connection between the stator core 22 and the stator body 21 can be realized, meanwhile, the flowing of cooling oil is facilitated, and the cooling oil is convenient to cool the stator assembly 20.

In some embodiments, oil injection holes 2211 are arranged on the periphery of the first stamped sheet 221, the oil injection holes 2211 are configured to communicate with the cooling channel 227, a plurality of oil injection holes 2211 are provided, the size and the number of the oil injection holes 2211 and the distance between two adjacent oil injection holes 2211 can be adjusted according to actual conditions (for example, heating conditions), so that cooling oil flows from the cooling channel 227 to the outer side of the stator assembly 20, the overall cooling effect is improved, and the overall heat dissipation effect is balanced.

In some embodiments, the third punching plate 223 is provided with an oil passing hole 2231, and the outer edge of the second punching plate 222 is provided with a protrusion 2221, so that when the cooling oil flows through the cooling channel 227, the cooling oil enters the oil passing hole 2231 through the protrusion 2221 to form communication between two adjacent cooling channels 227.

In the implementation process, the outer edge of the second punching sheet 222 is provided with the protrusion 2221, the third punching sheet 223 is provided with the oil passing hole 2231, and when the cooling oil flows through the cooling channel 227, at least a part of the cooling oil can pass through the oil passing hole 2231 through the barrier of the protrusion 2221, so that the communication between the two adjacent cooling channels 227 is realized, and the balance of the overall heat dissipation effect is realized.

Referring to fig. 2 again, the housing assembly 10 is further provided with an oil outlet 13, the oil outlet 13 is configured to communicate with the accommodating cavity to discharge the cooling oil in the accommodating cavity, wherein the oil outlet 13 may be disposed at the bottom of the housing assembly 10, and in order to facilitate outflow of the cooling oil, the bottom of the housing assembly 10 may further be provided with an oil outlet channel 14, the oil outlet channel 14 communicates with the oil outlet 13, and the oil outlet channel 14 can collect the cooling oil in the accommodating cavity and discharge the cooling oil through the oil outlet 13.

In some embodiments, the electric machine structure further comprises a rotor assembly 30, the rotor assembly 30 is disposed within the receiving cavity, and the rotor assembly 30 rotates relative to the stator assembly 20; the rotor assembly 30 includes a rotor body 31 and a bearing 32, the rotor body 31 is connected to the housing assembly 10 through the bearing 32, and at least a portion of the cooling oil flowing through the cooling channel 227 flows to the outside of the stator assembly 20 and cools the rotor body 31 and the bearing 32.

Specifically, when the cooling oil flows through the cooling passage 227, at least a portion of the cooling oil can flow to the outside of the stator core 22 through the oil injection hole 2211 of the first stamped steel 221, and then the portion of the cooling oil flows to the rotor assembly 30 and cools the rotor body 31 and the bearing 32, so that the balance of the heat dissipation effect of the entire device is achieved.

In a second aspect, the present application further provides an electric drive system, comprising: a motor structure as described in any one of the above; exemplarily, the electric drive system further comprises a motor controller and a transmission system, the motor structure converts electric energy into mechanical energy by using the principle of electromagnetic induction, and the new energy automobile provides power; the motor controller is responsible for controlling the current and voltage of the motor structure to enable the motor structure to work according to the required direction, rotating speed, torque and response time, and mainly comprises a power module, an MCU (micro controller Unit), a capacitor and the like. The transmission system takes a speed reducer as a core and transmits power generated by a motor to wheels.

The electric drive system provided in the embodiment of the second aspect of the present application includes the motor structure described in the technical solution of the first aspect, so that all technical effects of the embodiments described above are achieved, and details are not described herein again.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (12)

1. An electric machine construction, comprising:

a housing assembly having an accommodation cavity and an oil inlet configured to communicate with the accommodation cavity;

and the outer edge of the stator assembly is provided with a cooling channel, and the outer edge of the stator assembly is attached to the accommodating cavity so that the cooling oil flowing from the oil inlet flows through the cooling channel.

2. The electric machine structure according to claim 1, wherein the stator assembly comprises a stator body and a stator core, the stator core is disposed at an outer edge of the stator body, and the cooling channel is disposed at a side of the stator core facing away from the stator body.

3. The electric machine structure according to claim 1 or 2, characterized in that the cooling channels are provided in a plurality, and the plurality of cooling channels are spaced apart in the left-right direction of the stator assembly.

4. The electric machine structure according to claim 3, characterized in that communication is provided between two adjacent cooling channels.

5. The motor structure of claim 2, wherein the stator core includes a first punching sheet, a second punching sheet and a third punching sheet, the first punching sheet is disposed at the outermost side, the second punching sheet is disposed between the first punching sheet and the third punching sheet, and an outer diameter of the second punching sheet is smaller than an outer diameter of the first punching sheet and/or an outer diameter of the third punching sheet, so that the first punching sheet, the second punching sheet and the third punching sheet are enclosed to form the cooling channel.

6. The motor structure according to claim 5, wherein a first mating groove is arranged on an inner edge of the first punching sheet, a second mating groove is arranged on an inner edge of the second punching sheet, a third mating groove is arranged on an inner edge of the third punching sheet, and the first mating groove, the second mating groove and the third mating groove are in one-to-one correspondence to be used for penetrating at least a part of the structure of the stator body.

7. The electric machine structure of claim 5, characterized in that the periphery of the first lamination is provided with oil injection holes configured to communicate with the cooling channel.

8. The motor structure according to claim 5 or 7, characterized in that the third punching sheet is provided with an oil passing hole, and the outer edge of the second punching sheet is provided with a protrusion, so that when the cooling oil flows through the cooling channel, the cooling oil enters the oil passing hole through the protrusion to form communication between two adjacent cooling channels.

9. The electric machine structure of claim 1, wherein the housing assembly is further provided with an oil outlet, and the oil outlet is configured to communicate with the accommodating cavity to discharge the cooling oil in the accommodating cavity.

10. The electric machine structure of claim 1, further comprising a rotor assembly disposed within the containment cavity and rotating relative to the stator assembly.

11. The electric machine structure of claim 10, wherein the rotor assembly comprises a rotor body and a bearing, the rotor body is connected to the housing assembly through the bearing, and at least a portion of the cooling oil flowing through the cooling channel flows outside the stator assembly and cools the rotor body and the bearing.

12. An electric drive system, comprising: an electrical machine structure as claimed in any one of claims 1 to 11.

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