Distributed electric drive device and automobile

Abstract

The invention relates to the technical field of automobile device structures, in particular to a distributed electric drive device and an automobile. Comprising a main shell, two sets of planet row shells, two sets of end cover shells, a stator shell, an oil cooling structure and a water cooling structure, two sets of motors which are arranged at intervals in the axial direction are arranged in the main shell, and a controller is installed on the outer side of the upper end of the main shell; the two planet row shells are fixed to the two axial ends of the main shell correspondingly. The two groups of end cover shells are respectively arranged at the two axial ends of the main shell and are fixed on the planet row shells on the corresponding sides; the stator shell is positioned on the outer side of the stator assembly, so that the stator assembly is positioned in the closed cavity; the oil cooling structure comprises oil ways and oil coolers which are arranged on the main shell, the stator shell, the planet row shell and the end cover shell; the water cooling structure comprises water paths arranged on the controller, the oil cooler and the main shell. The distributed electric drive device has the characteristics of high energy density and high torque density and is good in heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile device structures, and in particular to a distributed electric drive device and an automobile. Background Art

[0002] With the development of the electric vehicle industry, higher requirements are placed on the power and maneuverability of the vehicle, and precise control of the torque of one side of the wheel is required. Based on customer needs, distributed electric drive has emerged.

[0003] Compared with the traditional mid-mounted drive system, the distributed drive system eliminates the torque transmission of the intermediate differential, allowing the motor to directly drive the wheels, making the transmission chain simpler and more compact, while realizing electronic differential control and individual control of the drive wheels, reducing the turning radius of the vehicle and solving problems such as rear wheel steering follow-up. Independent control of the drive / braking torque of each wheel is beneficial for rapid and precise control of the torque of each wheel under unstable conditions. In addition, the distributed electric drive can accurately feedback the wheel speed and drive torque through state characteristics such as voltage and current, providing a good basic condition for the integration of multiple information units of the vehicle. By individually controlling the drive wheels, the vehicle can achieve functions such as crab driving and turning around on the spot, enriching the application scenarios of the vehicle.

[0004] The motor part of the traditional distributed electric drive assembly adopts a radial flux motor, such as the prior art called a dual-motor distributed drive device and vehicle. The drive device is a radial distributed dual-motor distributed drive device. The electric drive and electric control housing of the housing component of the dual-motor distributed drive device is integrally formed, so that the screw connection structure between the two motors is reduced, thereby reducing the volume of the dual-motor distributed drive device. Moreover, through the integral formation of the electric drive and electric control housing, the oil cooling channel and the water cooling channel of the cooling component are arranged inside the electric drive and electric control housing, and can be connected to the first motor installation cavity, the second motor installation cavity, the first reducer installation cavity and the second reducer installation cavity, so that there is no need to arrange the connecting oil cooling channel and water cooling channel pipeline on the outside of the housing component. The distributed drive device of this structure has many advantages, but there are still many problems.

[0005] In actual applications, it is found that due to the cooling requirements of the radial flux motor stator and rotor, additional cooling circuits need to be added, and cooling circuits need to be added to the rotor part. Therefore, the radial flux motor has high requirements for the Y-direction dimension, which makes the entire drive device bloated in the Y-direction dimension. In addition, due to architectural limitations, the layout of the shaft gear and bearing lubrication and cooling circuits is complex, and the requirements for the overall space size are high; the controller part uses a split controller, resulting in a relatively high weight and volume of the controller. Because of the above design, the Y-direction dimension of the radial distributed electric drive is greater than 600mm, and the X-direction dimension is greater than 450mm, resulting in a large proportion of the Y-direction dimension of the entire drive device. At the same time, a dedicated rotor cooling circuit needs to be configured, which increases the weight of the entire electric drive system and makes the structure more complex, which also increases the energy consumption of the entire vehicle and affects the vehicle's endurance. Summary of the invention

[0006] The purpose of this application is to solve the deficiencies of the above-mentioned background technology and to provide a distributed electric drive device and a vehicle.

[0007] The technical solution of the present application is: a distributed electric drive device, comprising:

[0008] A main housing, wherein two sets of motors are arranged in an axial direction at intervals, each set of motors includes a stator assembly and two sets of rotor assemblies arranged on both sides of the stator assembly in the axial direction; a controller is installed on the outer side of the upper end of the main housing;

[0009] Two sets of planetary gear housings, the two sets of planetary gear housings are respectively fixed at two axial ends of the main housing, and planetary gears connected to corresponding side motors are installed in the planetary gear housings;

[0010] Two sets of end cover shells, the two sets of end cover shells are respectively disposed at two axial ends of the main shell, and the end cover shells are fixed on the corresponding side planetary gear housing to form a closed structure with the planetary gear housing;

[0011] A stator housing, wherein the stator housing is located outside the stator assembly so that the stator assembly is in a closed cavity;

[0012] An oil cooling structure, the oil cooling structure comprising an oil circuit and an oil cooler arranged on the main housing, the stator housing, the planetary gear housing and the end cover housing;

[0013] A water cooling structure includes a water path arranged on a controller, an oil cooler and a main housing.

[0014] According to a distributed electric drive device provided in the present application, two groups of oil cooling structures are provided on the main housing, and the two groups of oil cooling structures are symmetrically arranged along the axial direction and are respectively used for heat dissipation of two sets of motors.

[0015] According to a distributed electric drive device provided by the present application, the oil circuit includes:

[0016] An oil pump, the oil pump being arranged at an upper end of the outer side of the planetary gear housing;

[0017] An oil pool, the oil pool being located at the inner bottom of the planetary gear housing and the end cover housing;

[0018] The oil pump is communicated with the oil pool through oil passages arranged in the end cover housing and the planetary gear housing.

[0019] According to a distributed electric drive device provided by the present application, the oil circuit further includes:

[0020] A first end cover oil passage, wherein the first end cover oil passage is arranged in the end cover housing and an inlet end of the first end cover oil passage is connected to the oil pool;

[0021] A first planetary row oil passage, wherein the first planetary row oil passage is arranged in the planetary row housing, an inlet end of the first planetary row oil passage is connected to an outlet end of the first end cover oil passage, and an outlet end of the first planetary row oil passage is connected to an oil pump inlet;

[0022] A second planetary oil discharge passage, the second planetary oil discharge passage is arranged in the planetary gear housing, and an inlet end of the second planetary oil discharge passage is connected to an oil pump outlet;

[0023] A main housing oil passage, wherein the main housing oil passage is arranged in the main housing, the inlet end of the main housing oil passage is communicated with the outlet end of the second planetary displacement oil passage, and the outlet end of the main housing oil passage is communicated with the inlet of the oil cooler;

[0024] A stator oil passage, wherein the stator oil passage is arranged in the stator housing, and an inlet end of the stator oil passage is connected to an outlet end of the oil cooler;

[0025] A third planetary row oil passage, wherein the third planetary row oil passage is arranged in the planetary row housing, an inlet end of the third planetary row oil passage is connected to an outlet end of the stator oil passage, and an oil ring oil injection port for injecting oil to the planetary row is arranged at the outlet end;

[0026] A fourth planetary oil discharge passage, wherein the fourth planetary oil discharge passage is arranged in the planetary gear housing, and an inlet end of the fourth planetary oil discharge passage is communicated with an outlet end of the stator oil passage;

[0027] The second end cover oil passage is arranged in the end cover housing, the inlet end of the second end cover oil passage is connected with the outlet end of the fourth planetary gear oil passage, and the outlet end is provided with an end cover oil spraying port for spraying oil to the bearing in the end cover housing.

[0028] According to a distributed electric drive device provided in the present application, the stator oil passage is an annular oil passage which surrounds the stator housing as a whole with its inlet end close to the outlet end.

[0029] According to a distributed electric drive device provided in the present application, the water circuit includes oil cooler water channels corresponding to two oil coolers; the oil cooler water channels are cooling water channels that pass through the oil coolers, and the two oil cooler water channels are connected in parallel with each other.

[0030] According to a distributed electric drive device provided by the present application, the waterway further includes:

[0031] A controller water channel, wherein the controller water channel is a cooling water channel that passes through the controller and is used to cool the controller, wherein the inlet end of the controller water channel is connected to the automobile cooling system, and the outlet end of the controller water channel is connected to the inlet ends of the two oil cooler water channels;

[0032] The main casing water channel is a cooling water channel arranged in the main casing, the inlet end of the main casing water channel is connected with the outlet ends of the two oil cooler water channels, and the outlet end of the main casing water channel is connected with the automobile cooling system.

[0033] According to a distributed electric drive device provided in the present application, the main shell water channel is a cooling water channel arranged vertically, the upper end of the main shell water channel is an inlet end connected to the outlet ends of two oil cooler water channels, and the lower end of the main shell water channel is an outlet end connected to the automobile cooling system.

[0034] According to a distributed electric drive device provided in the present application, the planetary gear housing is fixed to the axial end of the main housing by bolts arranged along the axial direction; the end cover housing is fixed to the axial end of the planetary gear housing by bolts arranged along the axial direction.

[0035] The present application also relates to a car, which is equipped with any one of the above-mentioned distributed electric drive devices.

[0036] The advantages of the present application are as follows: 1. The distributed drive device of the present application is an axial flux motor, each motor is a combination structure of a single stator assembly and a dual rotor assembly, the size of the entire motor in the Y direction is smaller, the structural design is more compact, the structure is small and the weight is light, and it has the advantages of high energy density and high torque density. At the same time, the motor structure of the present application does not need to dissipate heat for the rotor assembly, so the oil cooling structure configured in the present application only dissipates heat for the stator assembly, and fully utilizes the main housing, the end cover housing, the planetary gear housing and the stator housing to construct the oil cooling structure of the entire system, which has an excellent heat dissipation effect, and the structure is simple and convenient to arrange and process, which reduces the energy consumption of the entire electric drive and improves the vehicle's endurance;

[0037] 2. This application uses two sets of oil cooling structures for two sets of motors. The two sets of oil cooling structures are arranged symmetrically, will not interfere with each other, and can effectively dissipate heat for the motors. The single set of oil cooling structure is exquisitely arranged, simple in structure, occupies a small space, and is easy to process;

[0038] 3. The oil cooling structure of the present application is provided with an oil pool at the bottom of the planetary gear housing and the end cover housing, which is convenient for collecting all the oil and concentrating the oil. An oil pump is provided at the upper end of the planetary gear housing, which is convenient for pumping the oil at the bottom to the top, and then evenly dispersed to all positions requiring heat dissipation under the action of pressure and gravity, with good heat dissipation effect and smooth oil flow;

[0039] 4. The oil cooling structure of the present application is simple, and the oil flows through the end cover housing, the planetary gear housing, the oil pump, the main housing, the stator housing, the planetary gear housing and the end cover housing in sequence, which can well cool and dissipate the components in the main housing, the planetary gear housing, the end cover housing and the stator housing. The oil cooling structure fully considers the heat-prone positions, greatly improves the heat dissipation effect of the entire electric drive device, and does not require additional heat dissipation structures, and the processing cost and the use cost are greatly reduced;

[0040] 5. The stator oil passage of the present application is an annular oil passage structure. After the oil enters the stator oil passage, it can surround the stator housing in an annular manner, which can dissipate heat for the stator assembly well, and the heat dissipation effect of the stator assembly is more uniform, thereby improving the heat dissipation effect of the stator assembly;

[0041] 6. The design of the water channel structure of the present application combines the water channels of the two oil coolers. By connecting the two water channels of the oil coolers in parallel, the complexity of the entire water channel structure is reduced, and the collection and distribution of the water channels are simpler;

[0042] 7. The water channel structure of the present application includes a water channel structure flowing through the controller and the main shell, which can effectively dissipate heat and cool the controller and the main shell. The controller water channel and the main shell water channel have simple structures and are easy to process;

[0043] 8. The main housing water channel of the present application runs through the main housing axially, which facilitates the arrangement of the entire water channel structure and is more convenient for cooperating with the cooling system of the entire automobile;

[0044] 9. The planetary gear housing, main housing and end cover housing of the present application are simply connected to each other and easy to assemble;

[0045] 10. The automobile of the present application is equipped with the above-mentioned distributed electric drive device, which occupies a small space in the Y direction of the automobile and is easy to arrange. The automobile has the characteristics of high energy density and high torque density, and also has a good heat dissipation effect.

[0046] The distributed electric drive device of the present application is an axial flux motor structure, which has the characteristics of high energy density and high torque density. It is equipped with an oil cooling structure and a water cooling structure with a simple structure and good heat dissipation effect, and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 : Schematic diagram of the explosion of the distributed electric drive device of the present application;

[0048] Figure 2 : A cross-sectional view of the distributed electric drive device of the present application;

[0049] Figure 3 : A side view of the main housing of the present application;

[0050] Figure 4 : Side view of the main housing of the present application (from another viewing direction);

[0051] Figure 5 : A side view of the planetary gear housing of the present application;

[0052] Figure 6 : Side view of the planetary gear housing of the present application (from another viewing direction);

[0053] Figure 7 : A side view of the end cover housing of the present application;

[0054] Figure 8 : A top view of the main housing of the present application;

[0055] Fig. 9 : Bottom view of the main shell of the present application;

[0056] Fig.10 : Schematic diagram of the oil cooling structure of the present application;

[0057] Fig.11 : Schematic diagram of the water cooling structure of this application;

[0058] Among them: 1—main housing; 2—planetary gear housing; 3—end cover housing; 4—stator housing; 5—stator assembly; 6—rotor assembly; 7—planetary gear; 8—oil cooler; 9—controller; 10—oil pump; 11—oil pool; 12—first end cover oil passage; 13—second end cover oil passage; 14—first planetary gear oil passage; 15—second planetary gear oil passage; 16—third planetary gear oil passage; 17—fourth planetary gear oil passage; 18—main housing oil passage; 19—stator oil passage; 20—first water passage; 21—controller water passage; 22—main housing water passage; 23—oil ring spray port; 24—end cover spray port. DETAILED DESCRIPTION

[0059] The embodiments of the present application are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0060] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and 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 therefore should not be understood as a limitation on the present application.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0063] The present application relates to a distributed electric drive device. The electric drive device of the present application is an axial flux motor structure. The electric drive device integrates two sets of motors. Each set of motors adopts a design structure of a single stator assembly and a dual rotor assembly. Compared with the radial flux motor structure, the axial flux motor structure of the present application occupies less space in the Y direction, is easy to arrange, has a compact structure, and is extremely light. It has the characteristics of high energy density and high torque density. In addition, the axial flux motor structure does not need to dissipate heat for the rotor assembly. Therefore, the distributed electric drive device of the present application does not need to be configured with a heat dissipation structure for dissipating heat for the rotor assembly, making the heat dissipation structure of the distributed electric drive device of the present application simpler, and the processing difficulty and cost are greatly reduced.

[0064] Specifically, Figures 1 to 11 As shown, a distributed electric drive device of the present application comprises a main housing 1, two sets of planetary gear housings 2, two sets of end cover housings 3, a stator housing 4, an oil cooling structure and a water cooling structure. The main housing 1 of the present application is a cylindrical structure with openings at both ends arranged along the axial direction. Two sets of motors arranged at intervals along the axial direction are arranged in the main housing 1, and each set of motors includes a stator assembly 5 and two sets of rotor assemblies 6 arranged on both sides of the axial direction of the stator assembly 5. A controller 9 is installed on the outer side of the upper end of the main housing 1, that is, one set of controller 9 controls the two sets of motors; the two sets of planetary gear housings 2 are respectively fixed at the axial ends of the main housing 1, and planetary gears 7 connected to the corresponding side motors are installed in the planetary gear housing 2, and the planetary gear housing 2 is a housing structure corresponding to the planetary gear 7; the two sets of end cover housings 3 are respectively placed at the axial ends of the main housing 1, and the end cover housing 3 is fixed on the corresponding side planetary gear housing 2 to form a closed structure with the planetary gear housing 2, and the end cover housing 3 and the planetary gear housing 2 are fixed at the axial ends of the main housing 1 to form a closed cavity structure with the main housing 1.

[0065] In addition, the shell structure of the present application also includes a stator shell 4, which is located outside the stator assembly 5 so that the stator assembly 5 is in a closed cavity. The stator shell 4 is used to construct a closed environment for the stator assembly 5. It is a structure that facilitates the separate heat dissipation of the stator assembly 5, and isolates the stator assembly 5 from the rotor assembly 6.

[0066] The oil cooling structure includes oil circuits and an oil cooler 8 arranged on the main housing 1, the stator housing 4, the planetary gear housing 2 and the end cover housing 3. The oil cooling structure is the main heat dissipation structure of the entire distributed electric drive device, and its main heat dissipation objects are the stator assembly 5, the planetary gear 7 and some corresponding bearing structures.

[0067] The water cooling structure is connected to the cooling system of the automobile, and the water cooling structure includes water channels arranged on the controller 9, the oil cooler 8 and the main housing 1. The water cooling structure exchanges heat with the oil cooling structure through the oil cooler 8, and the heat generated by the oil cooling structure can be dissipated through the water cooling structure. At the same time, the water cooling structure can also ensure that the controller 9 is always in a good temperature environment.

[0068] In some embodiments of the present application, the present embodiment optimizes the above-mentioned oil cooling structure, and two sets of oil cooling structures are provided on the main housing 1, and the two sets of oil cooling structures are arranged symmetrically along the axial direction and are respectively used for heat dissipation of two sets of motors. Because the distributed electric drive device of the present application includes two sets of motors, an independent oil cooling structure is used for each set of motors, and each set of oil cooling structure corresponds to the heat dissipation of one set of motors, which can make each set of oil cooling structure more compact, the oil flow is smoother, and the heat dissipation effect of the motor is better.

[0069] Specifically, Fig.10 As shown, the oil circuit of this embodiment includes an oil pump 10 and an oil pool 11. The oil pump 10 is arranged at the upper end of the outer side of the planetary gear housing 2, that is, the oil pump 10 is at a higher position of the planetary gear housing 2. Therefore, the oil discharged from the oil pump 10 not only has the pressure of the oil pump 10 itself, but also has a certain gravity effect. Under the action of pressure and gravity, the oil can enter the oil circuit more smoothly. The oil pool 11 is located at the bottom of the inner side of the planetary gear housing 2 and the end cover housing 3. The oil pool 11 is at a low position, which can conveniently collect the oil discharged from the oil circuit and concentrate the oil, so as to facilitate the oil pump 10 to suck the oil.

[0070] The oil pump 10 is connected to the oil pool 11 through the oil channels arranged in the end cover housing 3 and the planetary gear housing 2. That is to say, the connection between the oil pump 10 and the oil pool 11 does not require the arrangement of an additional pipeline structure, and can be directly connected through the oil channels in the end cover housing 3 and the planetary gear housing 2. This not only meets the flow requirements of the oil, but also can dissipate the heat of the end cover housing 3 and the planetary gear housing 2, thereby improving the overall heat dissipation effect.

[0071] Specifically, Fig.10As shown, the oil passage of this embodiment includes a first end cover oil passage 12, a second end cover oil passage 13, a first planetary oil discharge passage 14, a second planetary oil discharge passage 15, a third planetary oil discharge passage 16, a fourth planetary oil discharge passage 17, a main housing oil passage 18 and a stator oil passage 19. The above-mentioned oil passages of this embodiment are passages formed in the corresponding housing. The first end cover oil passage 12 is arranged in the end cover housing 3, and the inlet end (such as Fig.10 A) is connected to the oil pool 11; the first planetary row oil passage 14 is arranged in the planetary row housing 2, and the inlet end (such as Fig.10 E) and the outlet end of the first end cover oil passage 12 (as shown Fig.10 B) shown in the figure, the outlet port (such as Fig.10 F) is connected to the oil pump 10 inlet; the second planetary row oil passage 15 is arranged in the planetary row housing 2, and the inlet end (such as Fig.10 G) is connected to the outlet of the oil pump 10; the main housing oil passage 18 is arranged in the main housing 1, and the inlet end (such as Fig.10 M) and the outlet end of the second planetary oil discharge passage 15 (as shown Fig.10 H) shown in the figure, the outlet port (such as Fig.10 N) and the oil cooler 8 inlet (as shown Fig.10 Q shown in FIG) is connected; the stator oil passage 19 is arranged in the stator housing 4, and the inlet end (such as Fig.10 O) shown in the figure and the outlet end of the oil cooler 8 (as shown in the figure Fig.10 The third planetary row oil passage 16 is provided in the planetary row housing 2, the inlet end (such as Fig.10 I) and the outlet end of the stator oil passage 19 (as shown Fig.10 P) shown in the figure is connected, and the outlet port (such as Fig.10 The fourth planetary row oil passage 17 is provided in the planetary row housing 2, and the inlet end (such as Fig.10 K) and the outlet end of the stator oil passage 19 (as shown Fig.10 The second end cover oil passage 13 is arranged in the end cover housing 3, and the inlet end (such as Fig.10 C) and the outlet end of the fourth planetary oil discharge passage 17 (as shown Fig.10 L) shown in the figure, the outlet end (such as Fig.10 The end cover oil spraying port 24 shown in D) is provided to spray oil to the bearing in the end cover housing 3.

[0072] The oil flow process of this embodiment is as follows: the oil pump 10 is started to draw the oil from the oil pool 11. The oil discharged from the oil pool 11 will first enter the first end cover oil passage 12, pass through the first end cover oil passage 12 and enter the first planetary oil discharge passage 14, and then enter the oil pump 10. The oil pump 10 pumps the oil into the second planetary oil discharge passage 15. The second planetary oil discharge passage 15 guides the oil into the main housing oil passage 18. The oil flows in the main housing oil passage 18 and then enters the oil cooler 8. The oil completes heat exchange in the oil cooler 8 and enters the stator oil passage 19 after being discharged from the oil cooler 8. The oil flows in the stator oil passage 19 to dissipate heat and cool the stator assembly 5. The stator oil The stator oil passage 19 discharges the oil into the third planetary row oil passage 16, and the third planetary row oil passage 16 evenly sprays the oil onto the planetary row 7 through the oil ring spray port to dissipate heat and cool the planetary row 7. This part of the oil will finally flow back to the oil pool 11 after passing through the planetary row 7; another part of the oil discharged from the stator oil passage 19 will enter the fourth planetary row oil passage 17, and the fourth planetary row oil passage 17 will introduce the oil into the second end cover oil passage 13, and the second end cover oil passage 13 will evenly disperse the oil onto the bearings in the end cover housing 3 through the end cover spray port to dissipate heat and cool the bearings, and this part of the oil will finally flow back to the oil pool 11; the oil is collected in the oil pool 11 for the next cycle.

[0073] In addition, in order to improve the heat dissipation effect of the stator assembly 5, as Figure 3 As shown, the stator oil passage 19 of this embodiment is an annular oil passage that surrounds the stator housing 4 as a whole with its inlet end close to the outlet end. After the oil is discharged from the oil cooler 8, it passes through the inlet end of the stator oil passage 19 (such as Figure 3 The oil (O) shown in FIG. 1 enters the stator housing 5, then flows in an annular direction, evenly dissipates heat to the stator assembly 5, and finally exits from the outlet end of the stator oil passage 19 (as shown in FIG. Figure 3 P) shown in the figure flows out to complete the heat dissipation of the stator assembly 5.

[0074] In other embodiments of the present application, the above-mentioned water cooling structure is optimized in this embodiment. The water cooling structure in this embodiment is a heat dissipation structure connected to the cooling system of the automobile. The water path of the water cooling structure includes oil cooler water channels 20 corresponding to the two oil coolers 8. The oil cooler water channels 20 are cooling water channels passing through the oil coolers 8. The two oil cooler water channels 20 are connected in parallel with each other. That is, the two oil coolers 8 on the main housing 1 correspond to one oil cooler water channel 20 respectively. The oil cooler water channel 20 passes through the oil cooler 8. The oil cooler 8 dissipates heat through the coolant flowing through the oil cooler water channel 20. The oil cooler water channel 20 exchanges heat with the oil in the oil cooler 8 to cool down and dissipate heat for the oil.

[0075] Specifically, Fig.11As shown, the water path of this embodiment includes a controller water channel 21 and a main housing water channel 22. The controller water channel 21 is a cooling water channel that passes through the controller 9 and is used to cool the controller 9. The inlet end of the controller water channel 21 (such as Fig.11 a) is connected to the automobile cooling system, and the outlet end of the controller water channel 21 (such as Fig.11 b) and the inlet ends of the two oil cooler water channels 20 (as shown in Fig.11 c) as shown, the two oil cooler water channels 20 of this embodiment are arranged in parallel, and the water inlet of the two oil cooler water channels 20 comes from the controller water channel 21. The main shell water channel 22 is a cooling water channel arranged in the main shell 1, and the inlet end of the main shell water channel 22 is connected to the outlet end of the two oil cooler water channels 20 (as shown in FIG. Fig.11 As shown in d), the outlet end of the main shell water channel 22 is connected to the automobile cooling system. The main shell water channel 22 is convenient for arranging the entire water cooling structure and building the entire automobile cooling system. Of course, the main shell water channel 22 has a certain heat dissipation effect.

[0076] Specifically, Fig.11 As shown, the main shell water channel 22 of this embodiment is a cooling water channel arranged vertically, the upper end of the main shell water channel 22 is the inlet end connected to the outlet ends of the two oil cooler water channels 20, and the lower end of the main shell water channel 22 is the outlet end connected to the automobile cooling system.

[0077] During the coolant flow process of this embodiment: the coolant is discharged from the cooling system of the automobile into the controller water channel 21, the coolant enters the controller water channel 21 from the inlet of the controller water channel 21, exchanges heat with the controller 9, and dissipates heat and cools the controller 9, and the coolant is discharged from the outlet of the controller water channel 21, and then divided into two, one part enters a group of oil coolers 8 through the oil cooler water channel 20 on one side, and the other part enters another group of oil coolers 8 through the oil cooler water channel 20 on the other side. The coolant flows in the oil cooler water channel 20, and can exchange heat with the oil in the oil cooler 8 to dissipate heat and cool the oil. Finally, the oil is discharged from the outlet end of the oil cooler water channel 20 and finally gathered in the main shell water channel 22. The main shell water channel 22 discharges the coolant from the outlet end into the cooling system of the automobile, completing a cycle, and proceeding in sequence.

[0078] In actual application, the planetary gear housing 2 of the present application is fixed to the axial end of the main housing 1 by bolts arranged along the axial direction, and the end cover housing 3 is fixed to the axial end of the planetary gear housing 2 by bolts arranged along the axial direction. The specific assembly process is: after the axial flux motor is assembled, it is assembled to the main housing 1 by tightening bolts, the planetary gear 7 is assembled to the planetary gear housing 2, and then the end cover housing 3 is assembled to the axial end of the planetary gear housing 2 by a bolt structure to form an integral structure, and then the planetary gear housing 2 is connected to the planetary gear 7 and the end cover housing 3 and assembled together to the axial end of the main housing 1, and the motor shaft of the motor is inserted into the planetary gear 7 to complete the installation of the internal structure of the main housing 1; the controller 9 is assembled to the top installation position of the main housing 1 by a bolt structure, and then the two oil coolers 8 and the two oil pumps 10 are assembled to the corresponding installation positions on the main housing 1 to complete the installation of the entire distributed electric drive device.

[0079] The axial direction of this application Figure 2 The left and right directions in are the Y directions of the car (the Y directions of the car refer to the left and right directions of the car).

[0080] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A distributed electric drive device, characterized in that: include, A main housing (1), wherein two sets of motors are arranged in an axial direction at intervals, each set of motors comprises a stator assembly (5) and two sets of rotor assemblies (6) arranged on both sides of the stator assembly (5) in an axial direction; a controller (9) is installed on the outer side of the upper end of the main housing (1); Two sets of planetary gear housings (2), the two sets of planetary gear housings (2) being fixed to two axial ends of the main housing (1), respectively, and planetary gears (7) connected to corresponding side motors being installed in the planetary gear housings (2); Two groups of end cover shells (3), the two groups of end cover shells (3) are respectively arranged at two axial ends of the main shell (1), and the end cover shells (3) are fixed on the corresponding side planetary gear housing (2) to form a closed structure with the planetary gear housing (2); A stator housing (4), wherein the stator housing (4) is located outside the stator assembly (5) so that the stator assembly (5) is located in a closed cavity; An oil cooling structure, the oil cooling structure comprising an oil circuit and an oil cooler (8) arranged on a main housing (1), a stator housing (4), a planetary gear housing (2) and an end cover housing (3); A water cooling structure, comprising a water path arranged on a controller (9), an oil cooler (8) and a main housing (1).

2. A distributed electric drive device according to claim 1, characterized in that: The main housing (1) is provided with two sets of oil cooling structures, which are symmetrically arranged along the axial direction and are respectively used for heat dissipation of two sets of motors.

3. A distributed electric drive device as claimed in claim 2, characterized in that: The oil circuit includes: An oil pump (10), the oil pump (10) being arranged at an upper end position outside the planetary gear housing (2); An oil pool (11), the oil pool (11) being located at the inner bottom of the planetary gear housing (2) and the end cover housing (3); The oil pump (10) is connected to the oil pool (11) through oil passages provided in the end cover housing (3) and the planetary gear housing (2).

4. A distributed electric drive device as claimed in claim 3, characterized in that: The oil circuit also includes: A first end cover oil passage (12), wherein the first end cover oil passage (12) is arranged in the end cover housing (3), and an inlet end thereof is connected to the oil pool (11); A first planetary gear oil discharge passage (14), the first planetary gear oil discharge passage (14) being arranged in the planetary gear housing (2), the inlet end of the first planetary gear oil discharge passage (14) being connected to the outlet end of the first end cover oil passage (12), and the outlet end of the first planetary gear oil discharge passage (14) being connected to the inlet of the oil pump (10); A second planetary oil discharge passage (15), the second planetary oil discharge passage (15) being arranged in the planetary gear housing (2), and the inlet end of the second planetary oil discharge passage (15) being in communication with the outlet of the oil pump (10); A main housing oil passage (18), wherein the main housing oil passage (18) is arranged in the main housing (1), wherein the inlet end is communicated with the outlet end of the second planetary displacement oil passage (15), and the outlet end is communicated with the inlet of the oil cooler (8); A stator oil passage (19), wherein the stator oil passage (19) is arranged in the stator housing (4), and an inlet end of the stator oil passage (19) is connected to an outlet end of the oil cooler (8); A third planetary row oil passage (16), the third planetary row oil passage (16) being arranged in the planetary row housing (2), the inlet end of the third planetary row oil passage (16) being connected to the outlet end of the stator oil passage (19), and the outlet end being provided with an oil ring oil injection port (23) for injecting oil to the planetary row (7); A fourth planetary oil discharge passage (17), wherein the fourth planetary oil discharge passage (17) is arranged in the planetary gear housing (2), and the inlet end of the fourth planetary oil discharge passage (17) is connected to the outlet end of the stator oil passage (19); A second end cover oil passage (13), wherein the second end cover oil passage (13) is arranged in the end cover housing (3), the inlet end of the second end cover oil passage (13) is connected to the outlet end of the fourth planetary gear oil passage (17), and the outlet end is provided with an end cover oil spray port (24) for spraying oil to the bearing in the end cover housing (3).

5. A distributed electric drive device as claimed in claim 4, characterized in that: The stator oil passage (19) is an annular oil passage which surrounds the stator housing (4) as a whole with its inlet end close to the outlet end.

6. A distributed electric drive device according to claim 2, characterized in that: The water circuit comprises oil cooler water channels (20) corresponding to the two oil coolers (8); the oil cooler water channels (20) are cooling water channels passing through the oil coolers (8), and the two oil cooler water channels (20) are connected in parallel with each other.

7. A distributed electric drive device according to claim 6, characterized in that: The waterway also includes: A controller water channel (21), the controller water channel (21) is a cooling water channel that passes through the controller (9) and is used to cool the controller (9), the inlet end of the controller water channel (21) is connected to the automobile cooling system, and the outlet end of the controller water channel (21) is connected to the inlet ends of the two oil cooler water channels (20); A main casing water channel (22), wherein the main casing water channel (22) is a cooling water channel arranged in the main casing (1), the inlet end of the main casing water channel (22) is connected to the outlet ends of the two oil cooler water channels (20), and the outlet end of the main casing water channel (22) is connected to the automobile cooling system.

8. A distributed electric drive device according to claim 7, characterized in that: The main casing water channel (22) is a cooling water channel arranged vertically, the upper end of the main casing water channel (22) is an inlet end connected to the outlet ends of the two oil cooler water channels (20), and the lower end of the main casing water channel (22) is an outlet end connected to the automobile cooling system.

9. A distributed electric drive device according to claim 1, characterized in that: The planetary gear housing (2) is fixed to the axial end of the main housing (1) by means of bolts arranged along the axial direction; and the end cover housing (3) is fixed to the axial end of the planetary gear housing (2) by means of bolts arranged along the axial direction.

10. An automobile, characterized in that: The automobile is equipped with any one of the distributed electric drive devices as described in claims 1 to 9.

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