Electric driving force assembly and electric vehicle

Abstract

The utility model discloses an electric driving force assembly and an electric vehicle, and relates to the technical field of new energy automobiles, the electric driving force assembly comprises an integrated shell, a motor, a motor controller and a speed reducer; a controller containing cavity, a motor containing cavity and a speed reducer containing cavity which are sequentially arranged in the transverse direction are formed in the integrated shell. The motor is arranged in the motor accommodating cavity; the motor controller is arranged in the controller containing cavity and electrically connected with the motor. The speed reducer is arranged in the speed reducer accommodating cavity and is in transmission connection with an output shaft of the motor; according to the technical scheme, the overall structure can be simplified, and the overall weight can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and particularly relates to an electric drive assembly and an electric vehicle. Background Art

[0002] With the green transformation of the global automotive industry, electric vehicles (EVs), as representatives of clean energy vehicles, are witnessing rapid technological development and increasing market acceptance. One of the cores of an electric vehicle is the electric drive system, which is responsible for converting electrical energy into mechanical energy required to drive the vehicle. The performance of the electric drive system directly affects the overall vehicle efficiency, power output, and driving experience.

[0003] However, existing electric drive systems often consist of multiple independent components. Due to the dispersion of components, multiple vibration sources and noise sources are likely to occur during the operation of the electric drive system, resulting in poor noise, vibration, and harshness (NVH) performance. In addition, the connection points of multiple components in the electric drive system are also high-incidence areas of failures, and the reliability of mechanical connections is directly related to the stability and durability of the entire system. Summary of the Utility Model

[0004] The main object of the utility model is to propose an electric drive assembly and an electric vehicle, aiming to simplify the overall structure and reduce the overall weight.

[0005] To achieve the above object, the electric drive assembly proposed by the utility model includes:

[0006] An integrated housing, in which a controller accommodation cavity, a motor accommodation cavity, and a reducer accommodation cavity are sequentially arranged in the transverse direction;

[0007] A motor, which is arranged in the motor accommodation cavity;

[0008] A motor controller, which is arranged in the controller accommodation cavity and is electrically connected to the motor; and

[0009] A reducer, which is arranged in the reducer accommodation cavity and is in transmission connection with the output shaft of the motor.

[0010] In one embodiment, the integrated housing includes a hollow housing, a first cover plate, and a second cover plate. The first cover plate and the second cover plate are respectively arranged at two openings of the hollow housing. The first cover plate and the hollow housing enclose to form the controller accommodation cavity, the motor accommodation cavity is formed in the integrated housing, and the second cover plate and the hollow housing enclose to form the reducer accommodation cavity.

[0011] In one embodiment, the first cover plate is connected to the hollow housing by screws; and / or

[0012] The second cover plate is connected to the hollow shell through screws.

[0013] In one embodiment, the electric drive power assembly further includes a cooling component, wherein a liquid inlet end of the cooling component is disposed on the first cover plate, and a liquid outlet end of the cooling component is disposed at an end of the hollow shell close to the second cover plate, and the liquid inlet end and the liquid outlet end are connected by a pipeline.

[0014] In one embodiment, the liquid inlet end includes a first liquid inlet and a first liquid outlet provided on the first cover plate;

[0015] The liquid outlet includes an oil cooler, a second liquid inlet and a second liquid outlet. The oil cooler is arranged at one end of the hollow shell close to the second cover plate. The second liquid inlet and the second liquid outlet are arranged on the oil cooler. The second liquid inlet is connected to the first liquid outlet through the pipeline.

[0016] In one embodiment, the reducer includes an input shaft gear, an intermediate shaft gear and a differential gear, the input shaft gear is sleeved on the output shaft of the motor, the intermediate shaft gear is meshed with the input shaft gear, and the differential gear is meshed with the intermediate shaft gear.

[0017] In one embodiment, the electric drive force assembly further includes a power interface, and the power interface is disposed on the integrated housing, and the power interface is disposed close to the motor controller.

[0018] In one embodiment, the electric driving force assembly further includes a signal interface, and the signal interface is disposed on the integrated housing, and the signal interface is disposed close to the motor controller.

[0019] In one embodiment, the integrated housing is made of aluminum alloy or magnesium alloy.

[0020] The utility model also provides an electric vehicle, characterized by comprising the electric driving force assembly as described above.

[0021] In the technical solution of the utility model, a controller accommodating chamber, a motor accommodating chamber and a reducer accommodating chamber are formed in the integrated housing in sequence along the lateral direction, so that the integrated housing can accommodate the motor, the motor controller and the reducer at the same time, reducing the connection points between these components, simplifying the overall structure, forming a modular design, and reducing the overall weight. In addition, the reducer is connected to the output shaft of the motor in a driving manner, and the corresponding motor controller is located at the rear end of the motor. In this way, during the use of the motor, the vibration generated by the motor is propagated in its circumferential direction, and this vibration is not easy to cause vibration of the motor controller, which can effectively reduce the excitation of the motor controller system by the excitation source of the motor, thereby effectively controlling the noise. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 Schematic structural diagram of an embodiment of the electric drive assembly provided by the present invention;

[0024] Figure 2 Schematic structural diagram of another embodiment (hidden pipeline) of the electric drive assembly provided by the present invention;

[0025] Figure 3 Schematic structural diagram of yet another embodiment of the electric drive assembly provided by the present invention;

[0026] Figure 4 Exploded schematic structural diagram of an embodiment of the electric drive assembly provided by the present invention.

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Motor controller; 11. First cover plate; 12. First liquid outlet; 13. Power supply interface; 14. First liquid inlet; 15. Signal interface; 2. Motor; 21. Hollow housing; 22. Oil cooler; 23. Second liquid outlet; 24. Pipeline; 25. Second liquid inlet; 3. Reducer; 31. Second cover plate; 32. Input shaft gear; 33. Intermediate shaft gear; 34. Differential gear.

[0029] The realization, functional features and advantages of the objectives of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. Detailed Embodiments

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0033] The present utility model provides an electric drive assembly.

[0034] Please refer to Figures 1 to 4 , in an embodiment of the present utility model, the electric drive assembly includes an integrated housing, a motor 2, a motor controller 1, and a reducer 3; a controller accommodation cavity, a motor accommodation cavity, and a reducer 3 accommodation cavity are formed in the integrated housing in sequence along the transverse direction; the motor 2 is disposed in the motor accommodation cavity; the motor controller 1 is disposed in the controller accommodation cavity, and the motor controller 1 is electrically connected to the motor 2; the reducer 3 is disposed in the reducer 3 accommodation cavity, and the reducer 3 is in transmission connection with the output shaft of the motor 2.

[0035] Among them, the motor 2 is responsible for converting electrical energy into mechanical energy to generate the torque and rotational speed required to drive the vehicle; the motor controller 1 converts the direct current provided by the battery into alternating current to drive the motor 2 to work, and controls the speed and acceleration of the vehicle by controlling the motor 2; the reducer 3 is used to reduce the high-speed rotation output by the motor 2 to the low-speed rotation required by the wheels, and at the same time increase the torque to meet the driving requirements of the vehicle at different speeds.

[0036] In the technical solution of the present utility model, a controller accommodation cavity, a motor accommodation cavity, and a speed reducer 3 accommodation cavity are formed in the integrated housing in sequence along the transverse direction, so that the integrated housing can accommodate the motor 2, the motor controller 1, and the speed reducer 3 at the same time, reducing the connection points between these components, simplifying the overall structure, forming a modular design, and reducing the overall weight. In addition, the speed reducer 3 is in transmission connection with the output shaft of the motor 2, and the corresponding motor controller 1 is located at the rear end of the motor 2. Thus, during the use of the motor 2, the vibration generated by the motor 2 propagates circumferentially, and this vibration is not likely to cause the vibration of the motor controller 1, that is, the excitation source of the motor 2 to the motor controller 1 system can be effectively reduced, thereby effectively controlling the noise.

[0037] Specifically, in an embodiment of the present utility model, please refer to Figure 4 , the integrated housing includes a hollow housing 21, a first cover plate 11, and a second cover plate 31. The first cover plate 11 and the second cover plate 31 are respectively arranged at two openings of the hollow housing 21. The first cover plate 11 and the hollow housing 21 enclose to form the controller accommodation cavity, a motor accommodation cavity is formed in the integrated housing, and the second cover plate 31 and the hollow housing 21 enclose to form the speed reducer 3 accommodation cavity. The combination of the hollow housing 21, the first cover plate 11, and the second cover plate 31 provides a modular design, making the layout of each component clearer and more orderly. For example, the motor controller 1 is close to the first cover plate 11, and the speed reducer 3 is close to the second cover plate 31. And compared with multiple independent components, the integrated housing includes only the hollow housing 21, the first cover plate 11, and the second cover plate 31, with fewer housing numbers and housing connection points, increasing the rigidity of the overall structure and reducing deformation caused by vibration or external force.

[0038] For the convenience of disassembly and assembly, in an embodiment of the present utility model, both the first cover plate 11 and the second cover plate 31 are connected to the hollow housing 21 by screws. The screw connection method is convenient for quickly opening the first cover plate 11 or the second cover plate 31 for maintenance or replacement of internal components when needed, and the screw connection can provide a stable fixing force to ensure the tight combination between the first cover plate 11, the second cover plate 31 and the hollow housing 21, improving the stability of the overall structure. The screw connection method also has good applicability and can be applied to the connection between the first cover plate 11 or the second cover plate 31 with different thicknesses and the hollow housing 21.

[0039] To improve the service life of each component, in an embodiment of the present utility model, please refer to Figures 1 to 4, the electric drive assembly further includes a cooling component. The liquid inlet end of the cooling component is provided on the first cover plate 11, and the liquid outlet end of the cooling component is provided at one end of the hollow housing 21 close to the second cover plate 31. The liquid inlet end and the liquid outlet end are connected by a pipeline 24. With such an arrangement, the coolant can flow from the liquid inlet end to the liquid outlet end. Flowing through the liquid inlet end located on the first cover plate 11 can cool the motor controller 1, and flowing through the liquid outlet end located on the hollow housing 21 can cool the motor 2 and the reducer 3, which helps to extend the service life of components such as the motor 2, the motor controller 1, and the reducer 3. And under the connection of the pipeline 24, the coolant can cool all components of the electric drive assembly in one stroke, improving the cooling efficiency.

[0040] Specifically, in an embodiment of the present invention, please refer to Figures 1 to 4 , the liquid inlet end includes a first liquid inlet 14 and a first liquid outlet 12 provided on the first cover plate 11; the liquid outlet end includes an oil cooler 22, a second liquid inlet 25, and a second liquid outlet 23. The oil cooler 22 is provided at one end of the hollow housing 21 close to the second cover plate 31. The second liquid inlet 25 and the second liquid outlet 23 are provided on the oil cooler 22. The second liquid inlet 25 is connected to the first liquid outlet 12 by a pipeline 24. The first liquid inlet 14 and the first liquid outlet 12 are arranged at an upper and lower interval. Through the settings of the first liquid inlet 14 and the first liquid outlet 12, the path of the coolant entering and leaving the first cover plate 11 can be accurately controlled, ensuring the cooling effect on the motor controller 1; the setting of the oil cooler 22 helps to improve the cooling efficiency, especially for components that generate a large amount of heat, such as the reducer 3. The oil cooler 22 can provide additional heat dissipation capacity for the reducer 3. In addition, the flow of the coolant in the pipeline 24 can absorb and isolate part of the vibration and noise, improving the NVH performance of the electric drive assembly.

[0041] Furthermore, in an embodiment of the present invention, please refer to Figure 4 , the reducer 3 includes an input shaft gear 32, an intermediate shaft gear 33, and a differential gear 34. The input shaft gear 32 is sleeved on the output shaft of the motor 2. The intermediate shaft gear 33 meshes with the input shaft gear 32, and the differential gear 34 meshes with the intermediate shaft gear 33. Through the meshing of each gear, the high speed of the motor 2 can be effectively converted into a lower speed and a higher torque, which is crucial for improving the traction and climbing ability of the electric vehicle. At the same time, the input shaft gear 32, the intermediate shaft gear 33, and the differential gear 34 are integrated in the reducer 3, which helps to achieve a compact structural design and save space.

[0042] Specifically, in an embodiment of the present invention, please refer to Figure 4, the electric drive assembly further includes a power interface 13. The power interface 13 is disposed on the integrated housing and is close to the motor controller 1. The battery is electrically connected to the motor controller 1 through the power interface 13, thereby providing power for the electric drive assembly. The power interface 13 is disposed close to the motor controller 1. Specifically, it is disposed on the first cover plate 11. In this way, the length of the connection cable can be reduced, and the material cost and weight can be reduced. Among them, the design of the power interface 13 can be adjusted according to different types of motor controllers 1 to adapt to different power requirements and interface standards.

[0043] Furthermore, in an embodiment of the present invention, please refer to Figure 1 , the electric drive assembly further includes a signal interface 15. The signal interface 15 is disposed on the integrated housing and is close to the motor controller 1. The control signal of the vehicle is transmitted to the motor controller 1 through the signal interface 15. The signal interface 15 and the power interface 13 are both disposed on the first cover plate 11. On the one hand, when maintenance or operation is required, technicians can quickly access all interfaces, improving the maintenance efficiency. On the other hand, the centralized arrangement of the interfaces helps to reduce the internal wiring, reducing the possibility of wiring errors and also reducing the clutter of the wire harness.

[0044] Specifically, in an embodiment of the present invention, the material of the integrated housing is aluminum alloy or magnesium alloy. Aluminum alloy is easy to process and can be made into various shapes and sizes, suitable for mass production. Aluminum alloy is a good heat conductor, which helps to dissipate heat. And aluminum alloy usually has a lower cost and is economical and practical. The density of magnesium alloy is lower than that of aluminum alloy, and it is the lightest among all structural metal materials, which helps to further reduce the product weight. While being light in weight, magnesium alloy has high rigidity and impact resistance. And magnesium alloy has excellent heat conductivity, which helps to dissipate heat.

[0045] The present invention also provides an electric vehicle, which includes the above-mentioned electric drive assembly. The specific structure of the electric drive assembly refers to the above-mentioned embodiments. Since this electric vehicle adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0046] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An electric drive assembly, characterized in that, Comprising: An integrated housing, within which there are formed a controller accommodation cavity, a motor accommodation cavity, and a speed reducer accommodation cavity arranged in sequence along the transverse direction; A motor, which is arranged in the motor accommodation cavity; A motor controller, which is arranged in the controller accommodation cavity and is electrically connected to the motor; And A speed reducer, which is arranged in the speed reducer accommodation cavity and is in transmission connection with the output shaft of the motor.

2. The electric drive assembly according to claim 1, characterized in that, The integrated housing includes a hollow housing, a first cover plate, and a second cover plate. The first cover plate and the second cover plate are respectively arranged at two openings of the hollow housing. The first cover plate and the hollow housing enclose to form the controller accommodation cavity. The motor accommodation cavity is formed within the integrated housing. The second cover plate and the hollow housing enclose to form the speed reducer accommodation cavity.

3. The electric drive assembly according to claim 2, wherein, The first cover plate is connected to the hollow housing by screws; and / or The second cover plate is connected to the hollow housing by screws.

4. The electric drive assembly according to claim 2, characterized in that, The electric drive assembly further includes a cooling component. The liquid inlet end of the cooling component is arranged on the first cover plate. The liquid outlet end of the cooling component is arranged at one end of the hollow housing close to the second cover plate. The liquid inlet end and the liquid outlet end are connected by a pipeline.

5. The electric drive assembly according to claim 4, characterized in that, The liquid inlet end includes a first liquid inlet and a first liquid outlet arranged on the first cover plate; The liquid outlet end includes an oil cooler, a second liquid inlet, and a second liquid outlet. The oil cooler is arranged at one end of the hollow housing close to the second cover plate. The second liquid inlet and the second liquid outlet are arranged on the oil cooler. The second liquid inlet is connected to the first liquid outlet by the pipeline.

6. The electric drive assembly according to any one of claims 1 to 5, characterized in that The speed reducer includes an input shaft gear, an intermediate shaft gear, and a differential gear. The input shaft gear is sleeved on the output shaft of the motor. The intermediate shaft gear meshes with the input shaft gear. The differential gear meshes with the intermediate shaft gear.

7. The electric drive assembly according to any one of claims 1 to 5, characterized in that, The electric drive assembly further includes a power supply interface, which is arranged on the integrated housing and is arranged close to the motor controller.

8. The electric drive assembly according to any one of claims 1 to 5, characterized in that, The electric drive assembly further includes a signal interface, which is arranged on the integrated housing and is arranged close to the motor controller.

9. The electric drive assembly according to any one of claims 1 to 5, characterized in that, The material of the integrated housing is aluminum alloy or magnesium alloy.

10. An electric vehicle, characterized in that, Comprising the electric drive assembly according to any one of claims 1 to 9.

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