Motor cooling structure, electric drive assembly and vehicle

Abstract

The utility model provides a motor cooling structure, an electric drive assembly and a vehicle. The motor cooling structure comprises an oil cooling loop and a water cooling loop which are arranged in a motor. The oil cooling loop comprises an oil storage cavity arranged in the motor and an oil cooling channel communicated with the oil storage cavity, and the water cooling loop comprises a water cooling channel arranged in the motor; part of the water cooling channel is arranged close to the oil storage cavity so that heat exchange can be conducted between the water cooling channel and the oil storage cavity, and a plurality of heat exchange fins are arranged in the oil storage cavity and located on the side, close to the water cooling channel, in the oil storage cavity. According to the motor cooling structure, heat exchange can be carried out on the heat exchange fins in the oil storage cavity through the water cooling channel, heat of oil in the oil cooling channel is taken away, an oil cooler in a traditional oil cooling scheme can be omitted, the motor cooling structure is simpler and lower in cost, temperature rise in the motor can be effectively reduced, and the service life of the motor is prolonged. The motor efficiency and the operation economy are improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of drive assembly manufacturing, in particular to a motor cooling structure. The utility model also relates to an electric drive assembly provided with the above motor cooling structure. At the same time, the utility model also relates to a vehicle provided with the electric drive assembly. Background Art

[0002] The electric drive assembly is an important component in current electric vehicles. When the electric drive assembly works, current flows through the motor, causing serious heating of the stator core and stator winding. In order to improve the drive efficiency and operation reliability of the electric drive assembly, it is necessary to cool it.

[0003] Common cooling structures of drive motors include: air cooling, water cooling and oil cooling. Among them, the air cooling structure has a small cooling power and is often used for cooling small-power motors. The water cooling structure cools the overall temperature of the motor by adding a coolant channel outside the motor stator and using a low-temperature solution. However, it is difficult for this cooling method to efficiently cool the main heat-generating part of the drive motor - the winding end. Therefore, to achieve efficient cooling, it is necessary to increase the solution dose or flow rate, which in turn leads to a relatively large motor volume. The oil cooling structure cools by introducing a lower-temperature insulating cooling oil inside the motor, and has a high cooling efficiency and is currently widely used in the high-performance new energy passenger vehicle market.

[0004] In the prior art, the oil cooling system of the electric drive assembly cools both the motor and the reducer, and it is necessary to add an oil cooler, an oil pump and a filter. In this structure, the cooling of the oil in the motor is carried out by the oil cooler, which results in a complex structure and high cost of the electric drive assembly, and the cooling effect of the motor also needs to be further improved. Summary of the Utility Model

[0005] In view of this, the utility model aims to propose a motor cooling structure that can eliminate the oil cooler in the traditional oil cooling scheme.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A motor cooling structure includes an oil cooling circuit and a water cooling circuit provided in the motor;

[0008] The oil cooling circuit includes an oil storage cavity provided in the motor and an oil cooling channel communicated with the oil storage cavity, and the water cooling circuit includes a water cooling channel provided in the motor;

[0009] Part of the water cooling channel is arranged close to the oil storage cavity to enable heat exchange with the oil storage cavity, and a plurality of heat exchange fins are provided in the oil storage cavity, and the heat exchange fins are located on the side of the oil storage cavity close to the water cooling channel.

[0010] Furthermore, the oil cooling circuit includes an oil pump disposed on the motor, and the oil cooling channel is connected to the oil pump to form a circulation loop.

[0011] Furthermore, the oil cooling channel includes a first flow channel disposed in the housing of the motor, a second flow channel disposed on the end cover of the motor, and a third flow channel disposed in the rotor shaft of the motor. The oil storage cavity is located at the bottom of the housing; the first flow channel is communicated with the oil storage cavity through the oil pump, the first flow channel, the second flow channel and the third flow channel are communicated in sequence, and the third flow channel is communicated with the oil storage cavity through the inner cavity of the motor and the oil return port on the housing.

[0012] Furthermore, a communication hole is provided on the rotor shaft, the third flow channel is communicated with the inner cavity of the motor through the communication hole, and the outlet of the communication hole is arranged towards the stator assembly in the motor.

[0013] Furthermore, the communication holes are multiple and arranged at intervals along the circumferential direction of the rotor shaft; the outlets of the communication holes are all towards one end of the stator assembly, and the oil return port is arranged closer to the other end of the stator assembly relative to the outlets of the communication holes.

[0014] Furthermore, the heat exchange fins are multiple and arranged alternately along the flowing direction of the oil in the oil storage cavity.

[0015] Furthermore, the water cooling channel is arranged in a spiral shape in the housing of the motor, and the water cooling channel can exchange heat with the stator assembly in the motor.

[0016] Furthermore, the water cooling channel is formed on the water cooling jacket inside the housing.

[0017] Compared with the prior art, the present utility model has the following advantages:

[0018] For the motor cooling structure of the present utility model, by providing an oil storage cavity in the motor, an oil cooling channel communicated with the oil storage cavity, and heat exchange fins arranged in the oil storage cavity, and arranging the heat dissipation fins on one side of the oil storage cavity close to the water cooling channel, the heat exchange fins can be cooled by the water cooling channel, that is, the heat of the oil in the oil cooling channel is taken away by the coolant in the water cooling channel, so as to realize the cooling of the oil. Thus, the oil cooler in the traditional oil cooling scheme can be cancelled, making the motor cooling structure simpler and with lower cost, and can effectively reduce the temperature rise inside the motor, improve the motor efficiency and operation economy, and extend the service life of the motor.

[0019] In addition, a fuel pump is provided on the motor, which is beneficial to the flow of the oil in the oil cooling circuit. When the motor is applied in an electric drive assembly, two independent cavity spaces are formed inside the housing of the motor and the housing of the reducer. The oil in the oil cooling circuit only circulates inside the motor, thereby improving the cooling efficiency of the motor. The oil cooling channel includes a first flow channel, a second flow channel, and a third flow channel that are connected in sequence, and the first flow channel is formed in the housing of the motor, the second flow channel is arranged on the end cover of the motor, and the third flow channel is arranged inside the rotor shaft of the motor, which is beneficial to the processing and preparation of the oil passage. Moreover, the first flow channel is connected to the oil storage cavity through a fuel pump, and the third flow channel is connected to the oil storage cavity through the inner cavity of the motor and the oil return port on the housing, thereby forming a cooling circulation circuit for the oil.

[0020] Secondly, a communication hole provided on the rotor shaft connects the third flow channel with the inner cavity of the motor, and the outlet of the communication hole is arranged towards the stator assembly in the motor. Thus, the oil in the third flow channel can be ejected onto the stator assembly through the communication hole, so as to be able to cool the rotor assembly and the stator assembly in sequence better. The communication holes are multiple and arranged at intervals along the axial direction of the rotor shaft, which can further improve the cooling effect on the stator assembly. The setting of the position of the oil return port can extend the flow path of the oil, which is beneficial to improving the cooling efficiency of the motor.

[0021] In addition, the heat exchange fins are multiple and arranged alternately along the flowing direction of the oil in the oil storage cavity. It can extend the flow path of the oil in the oil cooling circuit, increase the heat dissipation area, and improve the heat dissipation effect. The water cooling channel is arranged in a spiral shape in the motor housing. It can increase the flow path of the coolant in the water cooling channel and increase the heat exchange area. It can not only better exchange heat with the oil in the oil storage cavity, but also better exchange heat with the stator assembly, so as to have a better heat exchange effect while making the motor cooling structure more compact. The water cooling channel is formed on the water cooling jacket, which is beneficial to the processing and preparation of the water cooling channel.

[0022] Another object of the present invention is to provide an electric drive assembly, including a reducer and a motor connected together; the motor is provided with the above-mentioned motor cooling structure.

[0023] Another object of the present invention is to provide a vehicle, which is provided with the above-mentioned electric drive assembly.

[0024] The electric drive assembly and the vehicle of the present invention have the same beneficial effects as the above-mentioned motor cooling structure compared with the prior art, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 Schematic diagram of the first perspective of the motor cooling structure according to the embodiment of the present utility model applied to an electric drive assembly;

[0027] Figure 2 Schematic diagram of the second perspective of the motor cooling structure according to the embodiment of the present utility model applied to an electric drive assembly;

[0028] Figure 3 Schematic diagram of the third perspective of the motor cooling structure according to the embodiment of the present utility model applied to an electric drive assembly;

[0029] Figure 4 Flow path diagram of the oil in the oil storage cavity according to the embodiment of the present utility model;

[0030] Figure 5 Schematic diagram of the structure of the motor cooling structure according to the embodiment of the present utility model;

[0031] Figure 6 Schematic diagram of the structure of the water-cooling jacket according to the embodiment of the present utility model;

[0032] Description of reference numerals:

[0033] 1. Motor; 2. Reducer; 101. Housing; 102. End cover; 11. Oil shell; 12. Oil pump; 13. Stator assembly; 14. Rotor shaft; 15. Water-cooling jacket; 141. Communication hole; 100. Oil storage cavity; 1011. Heat exchange fins; 1012. Oil outlet; 1013. Oil return port;

[0034] 10. Water inlet; 20. Water outlet; 30. First flow channel; 40. Second flow channel; 50. Third flow channel; 60. Water-cooling channel; A. Water inlet end; B. Water outlet end. Detailed implementation manners

[0035] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0036] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0038] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0039] Embodiment 1

[0040] This embodiment relates to a motor cooling structure, which can cancel the oil cooler in the traditional oil cooling scheme, effectively reduce the temperature rise inside the motor, improve the motor efficiency and operation economy, and thus can increase the service life of the motor.

[0041] In terms of the overall structure, as Figures 1 to 5 shown, the motor cooling structure of this embodiment includes an oil cooling circuit and a water cooling circuit provided in the motor 1. Among them, the oil cooling circuit includes an oil storage cavity 100 provided in the motor 1 and an oil cooling channel communicated with the oil storage cavity 100, and the water cooling circuit includes a water cooling channel 60 provided in the motor 1. Moreover, a part of the water cooling channel 60 is arranged close to the oil storage cavity 100 to enable heat exchange with the oil storage cavity 100, and a number of heat exchange fins 1011 are provided in the oil storage cavity 100, and the heat exchange fins 1011 are located on the side of the oil storage cavity 100 close to the water cooling channel 60.

[0042] At this time, in the above structure, the setting of the oil storage cavity 100 and the oil cooling channel, and the heat exchange fins 1011 provided in the oil storage cavity 100, and the heat exchange fins 1011 are arranged on the side close to the water cooling channel 60. In this way, the water cooling channel 60 can be used to exchange heat with the heat exchange fins 1011, that is, the coolant in the water cooling channel 60 takes away the heat of the oil in the oil cooling channel to realize the cooling of the oil. Thus, the oil cooler in the traditional oil cooling scheme can be cancelled, making the motor cooling structure simpler and with lower cost, and also effectively reducing the temperature rise inside the motor 1, improving the motor 1 efficiency and operation economy, and increasing the service life of the motor 1.

[0043] Specifically, continue to refer to Figures 1 to 5As shown, in this embodiment, an oil sump 11 is provided at the bottom of the housing 101 of the motor 1, and the above-mentioned oil storage cavity 100 is formed between the oil sump 11 and the bottom of the motor 1. During specific implementation, the oil sump 11 can be fixed to the bottom of the motor 1 by means such as welding, screwing or clamping. Moreover, an oil outlet 1012 and an oil return port 1013 communicating with the oil storage cavity 100 are provided at the bottom of the housing 101 of the motor 1. Among them, the oil outlet 1012 is communicated with the liquid inlet of the oil pump 12, and the oil return port 1013 communicates the inner cavity of the motor 1 with the oil storage cavity 100. In addition, in terms of the arrangement positions of the oil outlet 1012 and the oil return port 1013, it is preferably arranged at opposite ends of the oil storage cavity 100, so that the oil flowing into the oil storage cavity 100 through the oil return port 1013 can better exchange heat with the water-cooling channel 60, improving the cooling effect of the oil.

[0044] See Figures 3 to 5 , in this embodiment, the heat exchange fins 1011 are arranged on the side of the housing 101 away from the oil sump 11, that is, on the side close to the water-cooling channel within the oil storage cavity 100, which is beneficial to improving the heat exchange efficiency of the oil. Moreover, as a preferred implementation method, in this embodiment, the heat exchange fins 1011 are multiple and arranged in a staggered manner along the flowing direction of the oil within the oil storage cavity 100. Among them, the flowing direction of the oil is also the direction pointing from the oil return port 1013 to the oil outlet 1012. By arranging the multiple staggered heat exchange fins 1011, the oil within the oil storage cavity 100 can flow in a meandering manner around the multiple heat exchange fins 1011. For example, the oil can flow as Figure 4 the flowing path (dotted line part) shown in, and by setting it in this way, it can extend the flowing path of the oil in the oil-cooling loop, increase the heat exchange area, and improve the heat dissipation effect.

[0045] In this embodiment, as a preferred implementation method, the oil-cooling loop includes an oil pump 12 provided on the motor 1, and the oil-cooling channel is connected to the oil pump 12 to form a circulation loop. The setting of the oil pump 12 is beneficial to the flow of the oil in the oil-cooling loop. And when the motor 1 is applied to an electric drive assembly, two independent cavity spaces are formed inside the housing 101 of the motor 1 and the housing of the reducer 2, and the oil in the oil-cooling loop only circulates inside the motor 1, thereby improving the cooling efficiency of the motor 1.

[0046] See Figure 5As shown in the figure, the oil cooling channel of this embodiment, as a preferred implementation manner, specifically includes a first flow channel 30 provided in the housing 101 of the motor 1, a second flow channel 40 provided on the end cover 102 of the motor 1, and a third flow channel 50 provided in the rotor shaft 14 of the motor 1. The above-mentioned oil storage cavity 100 is located at the bottom of the housing 101. Moreover, the first flow channel 30 is communicated with the oil storage cavity 100 through an oil pump 12. The first flow channel 30, the second flow channel 40, and the third flow channel 50 are communicated in sequence, and the third flow channel 50 is communicated with the oil storage cavity 100 through the inner cavity of the motor 1 and the oil return port 1013 on the housing 101.

[0047] In this embodiment, the first flow channel 30 is arranged in the housing 101 of the motor 1, the second flow channel 40 is arranged on the end cover 102 of the motor 1, and the third flow channel 50 is arranged in the rotor shaft 14 of the motor 1, which is beneficial to the processing and preparation of the oil passage. Moreover, the first flow channel 30 is communicated with the oil storage cavity 100 through an oil pump 12, and the third flow channel 50 is communicated with the oil storage cavity 100 through the inner cavity of the motor 1 and the oil return port 1013 on the housing 101, thereby forming a circulation loop of the oil, that is, forming an oil cooling loop.

[0048] In terms of the specific structure, one end of the housing 101 of the motor 1 is open and generally cylindrical. The end cover 102 of the motor 1 seals the open end, and a accommodating cavity for accommodating the stator assembly 13 and the rotor assembly is formed between the housing 101 and the end cover 102. The inner cavity of the motor 1 is the accommodating cavity surrounded by the housing 101 and the end cover 102. The first flow channel 30 extends from one end inside the housing 101 to the end near the end cover 102 inside the housing 101. One end of the second flow channel 40 is communicated with the first flow channel 30, and the other end is communicated with the third flow channel 50 arranged in the rotor shaft 14. The third flow channel 50 is specifically a cavity formed in the rotor shaft 14.

[0049] Moreover, as a preferred implementation manner, a communication hole 141 is provided on the rotor shaft 14. The third flow channel 50 is specifically communicated with the inner cavity of the motor 1 through the communication hole 141, and the outlet of the communication hole 141 is arranged towards the stator assembly 13 in the motor 1. In this embodiment, the third flow channel 50 is communicated with the inner cavity of the motor 1 through the communication hole 141 provided on the rotor shaft 14, and the outlet of the communication hole 141 is arranged towards the stator assembly 13 in the motor 1, so that the oil in the third flow channel 50 can be ejected onto the stator assembly 13 through the communication hole 141, thereby being able to cool the rotor assembly and the stator assembly 13 in sequence better.

[0050] As a further preferred embodiment, in this embodiment, the communication holes 141 are multiple and arranged at intervals in the circumferential direction of the rotor shaft 14. Moreover, the outlets of the communication holes 141 all face one end of the stator assembly 13, while the oil return port 1013 is arranged closer to the other end of the stator assembly 13 relative to the outlets of the communication holes 141. The arrangement of the multiple communication holes 141 can further improve the cooling effect on the stator assembly 13. The setting of the position of the oil return port 1013 enables the oil ejected from the communication holes 141 to flow through the inner cavity of the motor 1 and then return to the oil storage cavity 100 through the return port, thereby extending the flow path of the oil and facilitating the improvement of the cooling efficiency of the motor 1.

[0051] It should be noted that in addition to all facing one end of the stator assembly 13, the outlets of the multiple communication holes 141 can also be arranged in two groups at intervals in the axial direction of the rotor shaft 14 on the rotor shaft 14. Each group of communication holes 141 can be multiple and arranged in the circumferential direction of the rotor shaft 14, and the outlets of the two groups of communication holes 141 face the two ends of the stator assembly 13 respectively. This is also feasible.

[0052] In this embodiment, the water cooling channel 60 is arranged in a spiral shape in the housing 101 of the motor 1, and the water cooling channel 60 can exchange heat with the stator assembly 13 in the motor 1. The water cooling channel 60 is arranged in a spiral shape in the housing 101 of the motor 1, which can increase the flow path of the coolant in the water cooling channel 60 and increase the heat exchange area. It can not only improve the heat exchange with the oil in the oil storage cavity 100, but also perform better heat exchange on the stator assembly 13, so that while having a good heat exchange effect, the motor cooling structure is more compact.

[0053] Combined Figure 5 and Figure 6 As shown, in this embodiment, a heat dissipation water jacket 15 is provided in the housing 101 of the motor 1. The heat dissipation water jacket 15 is cylindrical and has a through accommodation cavity. The stator assembly 13 and the rotor assembly are received in the accommodation cavity of the heat dissipation water jacket 15. At this time, the inner cavity of the motor 1 is also the accommodation cavity. And the above-mentioned water cooling circuit is specifically arranged between the heat dissipation water jacket 15 and the inner wall of the housing 101.

[0054] As a preferred embodiment, still referring to Figure 5 and Figure 6 As shown, the water cooling channel 60 is specifically formed on the heat dissipation water jacket 15 inside the housing 101, which is beneficial to the processing and preparation of the water cooling channel 60. Specifically, the heat dissipation water jacket 15 is cylindrical, which is installed in the housing 101 of the motor 1, and a spiral groove is provided on the outer peripheral surface of the heat dissipation water jacket 15, and this groove constitutes the water cooling channel 60. And at both ends of the water cooling channel 60, that is Figure 6 showing the water inlet end A and the water outlet end B, are respectively communicated with the water inlet 10 and the water outlet 20 on the housing 101.

[0055] In addition, as a further preferred embodiment, the water-cooling channels 60 are a plurality of branch channels arranged in parallel on the outer peripheral surface of the water-cooling jacket 15, and each branch channel is formed in a spiral shape along the circumferential direction of the water-cooling jacket 15. In this way, the flow path of the coolant in the water-cooling channels 60 can be extended, which is beneficial to improving the heat exchange effect on the stator assembly 13 and the oil storage cavity 100.

[0056] For the motor cooling structure of this embodiment, the heat exchange fins 1011 in the oil storage cavity 100 are heat-exchanged by the water-cooling channels 60, and the heat of the oil in the oil-cooling channels is taken away. Thus, the oil cooler in the traditional oil-cooling scheme can be cancelled, making the motor cooling structure simpler and with lower cost. Moreover, it can also effectively reduce the temperature rise inside the motor 1, improve the efficiency and operation economy of the motor 1, and extend the service life of the motor 1.

[0057] Embodiment 2

[0058] This embodiment relates to an electric drive assembly, which includes a reducer 2 and a motor 1 connected together. Among them, the motor 1 is provided with the motor cooling structure of Embodiment 1.

[0059] Looking back Figure 1 、 Figure 2 and Figure 5 As shown, in the electric drive assembly of this embodiment, two independent cavities are formed between the inner cavity of the reducer 2 housing 101 and the inner cavity of the motor 1. At this time, the oil-cooling circuit in the motor cooling structure only circulates inside the motor 1.

[0060] For the electric drive assembly of this embodiment, the heat of the oil in the oil-cooling channels is taken away by the coolant in the water-cooling channels 60 to realize the cooling of the oil. Thus, the oil cooler in the traditional oil-cooling scheme can be cancelled, making the motor cooling structure and the structure of the electric drive assembly simpler and with lower cost, and effectively reducing the temperature rise inside the motor 1, improving the efficiency and operation economy of the motor 1, and extending the service life of the motor 1.

[0061] In addition, this embodiment also relates to a vehicle, which is provided with the above-mentioned electric drive assembly. The vehicle of this embodiment has the same technical effects as the above-mentioned electric drive assembly, and will not be elaborated here.

[0062] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motor cooling structure, characterized in that: It comprises an oil cooling circuit and a water cooling circuit which are arranged in the motor (1); The oil cooling circuit comprises an oil storage chamber (100) provided in the motor (1), and an oil cooling channel communicated with the oil storage chamber (100), and the water cooling circuit comprises a water cooling channel (60) provided in the motor (1); Part of the water cooling channel (60) is arranged close to the oil storage chamber (100) so as to be able to exchange heat with the oil storage chamber (100), and a plurality of heat exchange fins (1011) are arranged in the oil storage chamber (100), and the heat exchange fins (1011) are located on one side of the oil storage chamber (100) close to the water cooling channel (60).

2. The motor cooling structure according to claim 1, characterized in that: The oil cooling circuit comprises an oil pump (12) provided on the motor (1), and the oil cooling channel is connected to the oil pump (12) to form a circulation circuit.

3. The motor cooling structure according to claim 2, characterized in that: The oil cooling channel comprises a first flow channel (30) provided in a housing (101) of the motor (1), a second flow channel (40) provided on an end cover (102) of the motor (1), and a third flow channel (50) provided in a rotor shaft (14) of the motor (1), and the oil storage chamber (100) is located at the bottom of the housing (101); The first flow channel (30) is connected to the oil storage chamber (100) through the oil pump (12), the first flow channel (30), the second flow channel (40) and the third flow channel (50) are connected in sequence, and the third flow channel (50) is connected to the oil storage chamber (100) through the inner cavity of the motor (1) and the oil return port (1013) on the housing (101).

4. The motor cooling structure according to claim 3, characterized in that: A connecting hole (141) is provided on the rotor shaft (14), the third flow channel (50) is connected to the inner cavity of the motor (1) through the connecting hole (141), and an outlet of the connecting hole (141) is arranged toward the stator assembly (13) in the motor (1).

5. The motor cooling structure according to claim 4, characterized in that: The communicating holes (141) are multiple and arranged at intervals along the circumferential direction of the rotor shaft (14); The outlet of each of the communicating holes (141) faces one end of the stator assembly (13), and the oil return port (1013) is arranged close to the other end of the stator assembly (13) relative to the outlet of each of the communicating holes (141).

6. The motor cooling structure according to claim 1, characterized in that: The heat exchange fins (1011) are multiple and arranged in a staggered manner along the flow direction of the oil in the oil storage chamber (100).

7. The motor cooling structure according to any one of claims 1 to 6, characterized in that: The water cooling channel (60) is arranged in a spiral shape in the housing (101) of the motor (1), and the water cooling channel (60) can exchange heat with the stator assembly (13) in the motor (1).

8. The motor cooling structure according to claim 7, characterized in that: The water cooling channel (60) is formed on a heat dissipation water jacket (15) inside the housing (101).

9. An electric drive assembly, characterized in that: It comprises a reducer (2) and a motor (1) connected together; The motor (1) is provided with a motor cooling structure according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle is provided with the electric drive assembly according to claim 9.

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