Power assembly and electric vehicle

Abstract

This application provides a powertrain and an electric vehicle. The powertrain housing includes a motor slot, a reducer slot, a mount mounting hole, an oil pump slot, a fine filter slot, and a heat exchanger mounting hole. The axial bottom of the reducer slot includes an output shaft bearing slot. The mount mounting hole, oil pump slot, fine filter slot, and heat exchanger mounting hole are distributed on the outer side of the axial bottom of the reducer slot and on the outer side of the circumferential wall of the motor slot. The mount mounting hole, fine filter slot, and oil pump slot surround the output shaft bearing slot, and the opening of the heat exchanger mounting hole is spaced apart from the opening of at least one of the oil pump slot or fine filter slot along the axial direction of the drive motor. By adjusting the layout of the oil pump slot, fine filter slot, and multiple heat exchanger mounting holes and mount mounting holes, this application can concentrate the oil pump, fine filter, and heat exchanger while achieving spaced-out placement of the heat exchanger and mount, which is beneficial for reducing the overall size of the powertrain and increasing the power density of the powertrain.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, and in particular to a powertrain and an electric vehicle. Background Technology

[0002] In the electric vehicle industry, the powertrain is the power source for the entire vehicle. With the development of electric vehicles, the requirements for powertrain power density and miniaturization are increasing. However, the current layout of some components in the powertrain has the problem of occupying a large amount of space, leading to an increase in the overall size of the powertrain. This is not conducive to improving the powertrain's power density and also negatively impacts its installation in the vehicle. Utility Model Content

[0003] This application provides a powertrain and an electric vehicle.

[0004] In a first aspect, embodiments of this application provide a powertrain. The powertrain housing includes a motor slot, a reducer slot, a mounting hole, an oil pump slot, a fine filter slot, and multiple heat exchanger mounting holes. The motor slot accommodates the drive motor of the powertrain, and the reducer slot accommodates the reducer of the powertrain. Along the axial direction of the drive motor, the slot opening of the reducer slot faces away from the slot opening of the motor slot. The bottom of the axial slot of the reducer slot includes an output shaft bearing slot for fixing the output shaft bearing of the reducer.

[0005] The components include a suspension mounting hole for fixing the suspension, an oil pump slot for accommodating the oil pump, a fine filter slot for accommodating the fine filter, and multiple heat exchanger mounting holes for fixing the heat exchangers. The suspension mounting holes, oil pump slot, fine filter slot, and multiple heat exchanger mounting holes are distributed on the outer side of the axial bottom of the reducer slot and on the outer side of the circumferential wall of the motor slot. The suspension mounting holes, fine filter slot, and oil pump slot surround the output shaft bearing slot along the circumferential direction of the drive motor. The openings of the multiple heat exchanger mounting holes are spaced apart from the opening of at least one of the oil pump slots or fine filter slots along the axial direction of the drive motor.

[0006] In this embodiment, the motor slot and the reducer slot are integrated into the powertrain housing. The slot opening of the motor slot faces away from the slot opening of the reducer slot, making the drive motor and reducer compact and reducing the overall size of the powertrain. The output shaft bearing slot is located at the axial bottom of the reducer slot, where the axial bottom of the reducer slot refers to the bottom of the reducer slot along the axial direction of the drive motor.

[0007] In this embodiment, the powertrain housing also integrates mount mounting holes, an oil pump slot, a fine filter slot, and multiple heat exchanger mounting holes. The mount mounting holes are used to mount the suspension, which is connected to the vehicle frame. The oil pump slot houses the oil pump, which powers the oil and delivers it to the fine filter. The fine filter slot houses the fine filter, which filters the oil to prevent impurities from affecting the normal operation of the powertrain. The fine filter also delivers the filtered oil to the heat exchangers. The heat exchanger mounting holes secure the heat exchangers, which use cooling water to cool the oil. The heat exchangers also deliver the cooled oil to the motor slot to cool the stator and rotor of the drive motor.

[0008] In this embodiment, the positional relationship of the oil pump slot, the fine filter slot, and the heat exchanger mounting hole reflects the positional relationship of the oil pump, the fine filter, and the heat exchanger. If the oil pump slot, the fine filter slot, and the heat exchanger mounting hole are separately arranged in different positions on the powertrain housing, in order to reduce the overall volume of the powertrain, it may be necessary to adjust multiple structures or components at different positions of the powertrain to respectively accommodate the fixing of the oil pump, the fine filter, and the heat exchanger. In this embodiment, the oil pump slot, the fine filter slot, and the heat exchanger mounting hole are concentrated in the same area, which can reduce structural modifications to the powertrain or changes in the position of components, which is beneficial to reducing the layout difficulty of the oil pump, the fine filter, and the heat exchanger in the powertrain, and can also shorten the transmission path of oil between the oil pump, the fine filter, and the heat exchanger.

[0009] In this embodiment, the orientation of the motor slot along the axial direction of the drive motor is opposite to that of the reducer slot. The oil pump slot, fine filter slot, and heat exchanger mounting holes are distributed on the outer side of the circumferential wall of the motor slot and the outer side of the axial bottom of the reducer slot, which improves the space utilization of the powertrain without interfering with the layout of the drive motor and reducer. Concentrating the oil pump slot, fine filter slot, and heat exchanger mounting holes on the outer side of the circumferential wall of the motor slot and the outer side of the axial bottom of the reducer slot avoids additionally extending the overall size of the powertrain based on the motor and reducer slots, which is beneficial for powertrain miniaturization and also facilitates communication between the oil pump, fine filter, and heat exchanger and the motor and reducer slots.

[0010] In this embodiment, the mounting holes are also distributed on the outer side of the circumferential groove wall of the motor slot and the outer side of the axial groove bottom of the reducer slot. Currently, the mounting holes used to fix the reducer to the frame are usually around the outer circumference of the output shaft bearing slot. Therefore, arranging the oil pump, fine filter, and heat exchanger outside the reducer slot and motor slot may present the problem of how to avoid misalignment with the mounting holes. If the oil pump slot, fine filter slot, heat exchanger mounting holes, and mounting holes are sequentially arranged around the outer circumference of the output shaft bearing slot, the layout of the mounting holes and heat exchangers may interfere with each other due to their typically large size. In this embodiment, the oil pump slot, fine filter, and mounting holes are arranged at intervals along the circumference of the drive motor, and the heat exchanger mounting holes are arranged at intervals along the axial direction of the drive motor, such that the heat exchanger and at least one of the oil pump or fine filter slots are stacked along the axial direction of the drive motor. By utilizing the space of the heat exchanger arranged along one side of the drive motor axis, including the oil pump and fine filter, it is possible to achieve the separation of the heat exchanger from the mounting.

[0011] In one embodiment, the distance between the center of one heat exchanger mounting hole and the center of another heat exchanger mounting hole is greater than the outer diameter of at least one of the oil pump slot or the fine filter. Along the axial direction of the powertrain, the distance between the opening of each heat exchanger mounting hole and the suspension mounting hole is greater than the distance between the slot opening of at least one of the oil pump slot or the fine filter and the suspension mounting hole.

[0012] In this embodiment, the distance between the center of one heat exchanger mounting hole and the center of another heat exchanger mounting hole is greater than the outer diameter of at least one of the oil pump slots or fine filters, indicating that the installation area occupied by the heat exchanger is larger than that of at least one of the oil pumps or fine filters. To avoid interference between the heat exchanger and the suspension, the distance between the opening of the heat exchanger mounting hole and the suspension mounting hole is greater than the distance between the slot opening of at least one of the oil pump slots or fine filters and the suspension mounting hole. That is, the heat exchanger is distributed on the side of at least one of the oil pumps or fine filters away from the suspension, which helps to save the installation area of ​​the suspension, oil pump, and fine filter, and reduces the layout difficulty.

[0013] In one embodiment, the orientation of the oil pump slot, the orientation of the fine filter slot, and the orientation of the openings of the plurality of heat exchanger mounting holes are parallel.

[0014] In this embodiment, the orientation of the oil pump slot opening, the orientation of the fine filter slot opening, and the orientation of the heat exchanger mounting hole correspond to the installation directions of the oil pump, fine filter, and heat exchanger, respectively. Having the oil pump, fine filter, and heat exchanger installed in the same direction avoids repeatedly rotating the powertrain during installation. The installation of the oil pump, fine filter, and heat exchanger can be completed with the powertrain in the same orientation, which helps reduce installation costs and difficulty.

[0015] In one embodiment, the suspension mounting holes, oil pump slot, fine filter slot, and multiple heat exchanger mounting holes are distributed on the outer wall of the axial bottom of the reducer slot. The slot openings of the oil pump slot, the fine filter slot, and the multiple heat exchanger mounting holes are parallel to the axial direction of the drive motor.

[0016] In this embodiment, the oil pump slot, the fine filter slot, and the heat exchanger fixing hole extend from the axial bottom of the reducer slot along the axial direction of the drive motor. The extension direction of the oil pump slot, the fine filter slot, and the heat exchanger fixing hole is parallel to the extension direction of the motor slot, which is beneficial to improve the utilization rate of the space outside the circumferential slot wall of the motor slot and reduce the volume of the powertrain.

[0017] In one embodiment, the bottom of the output shaft bearing slot includes a shaft hole extending axially along the drive motor for the output shaft of the reducer to pass through. The opening of the output shaft bearing slot faces away from the opening of the oil pump slot and the opening of the fine filter slot.

[0018] The bottom and part of the wall of the output shaft bearing groove along the axial direction of the drive motor protrude relative to the openings of the oil pump groove and the fine filter groove. The oil pump groove and the fine filter groove are located on the outer periphery of part of the wall of the output shaft bearing groove.

[0019] In this embodiment, the output shaft of the reducer extends out of the reducer slot through the shaft hole from the output shaft bearing slot. A portion of the output shaft is distributed outside the axial bottom of the reducer slot and outside the circumferential wall of the motor slot. The bottom and part of the wall of the output shaft bearing slot protrude outwards towards the axial bottom of the reducer slot, thus protecting the output shaft. Arranging the oil pump slot and the fine filter slot on the outer circumference of the bottom and part of the wall of the output shaft bearing slot protruding along the axial direction of the drive motor allows for reuse of the space on the outer circumference of the bottom and part of the wall of the output shaft bearing slot.

[0020] In one embodiment, the distance between the center of at least one heat exchanger fixing hole and the center of the shaft hole is greater than the distance between the center of at least one of the oil pump tank or the fine filter tank and the center of the shaft hole.

[0021] In this embodiment, the output shaft rotates at high speed during operation to transmit torque to the wheels. Heat exchanger mounting holes are distributed on at least one of the oil pump slots or fine filter slots along the axial direction of the drive motor, away from the suspension mounting holes; that is, the heat exchanger is distributed along the axial direction of the drive motor on the outer side of at least one of the oil pump or fine filter. In this embodiment, the distance between the center of at least one heat exchanger mounting hole and the center of the shaft hole is greater than the distance between the center of at least one of the oil pump slots or fine filter slots and the center of the shaft hole, ensuring a safe distance between the heat exchanger and the output shaft and preventing interference with the normal operation of the output shaft.

[0022] In one embodiment, a heat exchanger is used to connect to a fine filter. The distance between the opening of the fine filter slot and the bottom of the output shaft bearing slot along the axial direction of the drive motor is less than the distance between the opening of the oil pump slot and the bottom of the output shaft bearing slot. Multiple heat exchanger mounting holes surround the outer periphery of the fine filter slot, and along the axial direction of the drive motor, the heat exchangers are distributed on the side of the fine filter opposite to the reducer slot.

[0023] In this embodiment, the heat exchanger is used to receive the oil filtered by the fine filter. The heat exchanger and the fine filter are arranged along the axial direction of the drive motor, which helps to shorten the oil transmission path, reduce the power loss of the oil in the transmission path, and also reduce the installation area occupied on the outer wall of the axial groove bottom of the reducer slot.

[0024] In this embodiment, since the heat exchanger is located on the side of the fine filter away from the reducer slot, it is necessary to avoid the heat exchanger protruding too much in the axial direction of the drive motor, thus controlling the axial space occupied by the heat exchanger and fine filter in the powertrain. The fine filter slot and oil pump slot surround the outer periphery of the output shaft bearing slot. The axial distance between the opening of the fine filter slot and the bottom of the output shaft bearing slot is smaller than the axial distance between the opening of the oil pump slot and the bottom of the output shaft bearing slot. This means that along the axial direction of the drive motor, the fine filter is closer to the reducer cavity than the oil pump, resulting in a relatively larger space on the side of the fine filter away from the reducer slot. In this embodiment, when the heat exchanger and fine filter are stacked along the axial direction of the drive motor, the axial dimension of the powertrain is not additionally extended.

[0025] In one embodiment, the powertrain housing further includes a heat exchanger mounting surface and two heat exchange holes. The heat exchanger mounting surface is located on the outer wall of the axial groove bottom of the reducer slot, and multiple heat exchanger mounting holes and two heat exchange holes are distributed on the heat exchanger mounting surface.

[0026] One heat exchange hole connects the outlet of the fine filter to the inlet of the heat exchanger, and the other heat exchange hole connects the outlet of the heat exchanger to the motor slot. The perpendicular distance between the center of the other heat exchange hole and the axis of the motor slot is less than the perpendicular distance between the center of the first heat exchange hole and the axis of the motor slot.

[0027] In this embodiment, two heat exchange holes and multiple heat exchanger mounting holes are distributed on the same heat exchanger mounting surface, which helps to reduce the axial space occupied by the heat exchanger mounting holes and the heat exchanger. The heat exchanger receives oil from the fine filter through one heat exchange hole and delivers oil to the motor slot through another heat exchange hole. The distance between the center of the other heat exchange hole and the motor slot is smaller than the distance between the center of the first heat exchange hole and the motor slot, which helps to reduce the power loss of oil transmission between the heat exchanger and the motor slot and improve cooling efficiency.

[0028] In one embodiment, the oil pump slot is arranged between another heat exchange hole and the motor slot. The other heat exchange hole connects to the motor slot via an internal housing flow channel, which also connects the other heat exchange hole and the motor slot. An internal housing flow channel is located inside the axial bottom of the reducer slot, and another internal housing flow channel is arranged between the output shaft bearing slot and the oil pump slot.

[0029] In this embodiment, the heat exchanger and the fine filter are stacked along the axial direction of the drive motor. Since the heat exchanger occupies a relatively large installation space, and the heat exchanger is far away from the motor slot relative to the oil pump, it is easy to achieve the separation of the heat exchanger and the motor slot, and reduce the difficulty of the centralized arrangement of the oil pump, fine filter and heat exchanger.

[0030] In this embodiment, the heat exchanger is connected to the motor slot via an internal flow channel within the housing. This internal flow channel is located inside the axial bottom of the reducer slot, preventing interference with the installation of the oil pump, fine filter, and heat exchanger, and reducing the space occupied by these components. The internal flow channel is positioned between the output shaft bearing slot and the oil pump slot, facilitating control of its length and shortening the oil transmission path.

[0031] In one embodiment, a heat exchange hole is located between a heat exchanger fixing hole and a fine filter tank. The bottom of the fine filter tank includes a liquid outlet and a protrusion, and the heat exchange hole connects to the liquid outlet through another internal flow channel of the housing. The opening of the liquid outlet along the axial direction of the drive motor and the protruding direction of the protrusion are opposite to the reducer tank, and the other internal flow channel of the housing is located inside the protrusion.

[0032] In this embodiment, the bottom of the fine filter tank includes an outlet and a protrusion. The heat exchanger is connected to the outlet of the fine filter tank via another internal flow channel within the housing. The protrusion extends from the bottom of the fine filter tank along the axial direction of the drive motor, away from the reducer tank. Since the fine filter tank is closer to the inner cavity of the reducer tank than the oil pump tank, the other internal flow channel is located inside the protrusion at the bottom of the fine filter tank. This reduces the space occupied by the other internal flow channel within the reducer tank's inner cavity, avoiding negative impacts on the reducer's layout.

[0033] In one embodiment, the powertrain housing further includes an electrical control slot for accommodating at least two of the powertrain's motor controller, on-board charger, and DC-DC converter. The electrical control slot is stacked over the reducer slot and the motor slot, with a portion of the bottom of the electrical control slot protruding relative to the circumferential wall of the motor slot and the axial bottom of the reducer slot. The portion of the bottom of the electrical control slot, the circumferential wall of the motor slot, and the axial bottom of the reducer slot form a receiving cavity for accommodating an oil pump, a fine filter, and a heat exchanger.

[0034] In this embodiment, the electrical control slot is integrated into the powertrain housing, and the slot forms an electrical control cavity. A portion of the bottom of the electrical control slot protrudes relative to the axial bottom of the reducer slot and the circumferential wall of the motor slot, forming a receiving cavity together with the axial bottom of the reducer slot and the circumferential wall of the motor slot. The oil pump slot, fine filter slot, and heat exchanger mounting holes are located on the outer sides of the portion of the bottom of the electrical control slot, the outer sides of the axial bottom of the reducer slot, and the outer sides of the circumferential wall of the motor slot. Integrating the electrical control slot, motor slot, and reducer slot into the powertrain housing allows the powertrain to have its own dimensions in different directions. This utilizes unused space within the receiving cavity to accommodate the oil pump, fine filter, and heat exchanger, avoiding the need for the oil pump, fine filter, and heat exchanger to extend the powertrain's dimensions beyond the electrical control slot, motor slot, and reducer slot, thus reducing the overall volume of the powertrain.

[0035] In this embodiment, the electrical control slot is used to accommodate at least two of the motor controller, on-board charger, and DC-DC converter. While improving the integration of the powertrain, the bottom area of ​​the electrical control slot is increased, which is beneficial to expanding the space of the accommodating cavity and reducing the layout difficulty of the oil pump, fine filter, and heat exchanger.

[0036] In one embodiment, a portion of the bottom of the electrical control slot includes a recessed groove, which is recessed towards the opening of the electrical control slot along the stacking direction of the electrical control slot and the reducer slot. Some of the suspension and fixing holes are distributed within the recessed groove, and the distance between some of the suspension and fixing holes and the opening of the electrical control slot along the stacking direction of the electrical control slot and the reducer slot is less than the distance between the center of the output shaft bearing slot and the opening of the electrical control slot.

[0037] In this embodiment, along the stacking direction of the electrical control slot and the reducer slot, the slot opening of the electrical control slot faces away from the reducer slot and the motor slot. The mounting bracket, oil pump, fine filter, and heat exchanger are distributed within the receiving cavity. Since the mounting bracket typically occupies a large space, its layout can be adjusted by changing the bottom structure of the electrical control slot. Specifically, the portion of the bottom of the electrical control slot that forms the receiving cavity includes a recessed groove, with the recessed groove recessed towards the slot opening of the electrical control slot. Arranging some of the mounting bracket fixing holes within a recessed groove allows for more space on the outer periphery of the output shaft bearing slot for arranging the oil pump, fine filter, and heat exchanger. This facilitates the avoidance of the oil pump, fine filter, and heat exchanger from the mounting bracket, reducing layout complexity.

[0038] In one embodiment, the oil pump, fine filter, and heat exchanger are distributed within the projection of a portion of the bottom of the electrical control tank along the stacking direction of the electrical control tank and the reducer tank.

[0039] In this embodiment, a portion of the bottom of the electronic control slot is used to form a receiving cavity. Along the stacking direction of the electronic control slot and the reducer slot, the oil pump, fine filter, and heat exchanger are distributed within the projection of a portion of the bottom of the electronic control slot. This centralized arrangement of the oil pump, fine filter, and heat exchanger avoids increasing the size of the powertrain based on the powertrain housing, which is beneficial for optimizing the powertrain layout in the vehicle and improving the powertrain's power density.

[0040] In one embodiment, the heat exchanger receives cooling water delivered from the outlet of the electrical control tank via a water pipe.

[0041] One wall of the electrical control slot is connected to a portion of its bottom. This wall includes another recessed slot, which faces the reducer slot along the axial direction of the drive motor. The other recessed slot is used to accommodate a portion of the water pipe, with the outlet located at the bottom of this recessed slot.

[0042] In this embodiment, when the powertrain is in operation, the heat generated by the motor controller is typically less than that of the drive motor. The heat exchanger utilizes cooling water from the electrical control tank to cool the oil, enhancing the cooling effect on the drive motor and improving the utilization rate of the cooling water. The heat exchanger receives cooling water from the outlet of the electrical control tank via water pipes. Since the heat exchanger and at least one of the oil pump or fine filter are stacked along the axial direction of the drive motor, it is necessary to avoid the water pipes additionally increasing the axial dimension of the powertrain. In this embodiment, one wall of the electrical control tank is connected to a portion of its bottom, and the receiving cavity is adjacent to one wall of the electrical control tank. One wall of the electrical control tank includes another recessed groove, which is recessed along the axial direction of the drive motor towards the reducer slot. The water outlet is located at the bottom of the other recessed groove, and a portion of the water pipe is located within the other recessed groove. This helps to prevent the water pipe from protruding excessively along the axial direction of the drive motor, reducing the axial space occupied by the water pipe in the receiving cavity.

[0043] In one embodiment, the distance between the water outlet and the output shaft bearing groove along the stacking direction of the electrical control groove and the reducer groove is less than the distance between the water outlet and the groove opening of the electrical control groove.

[0044] In this embodiment, the outlet of the electrical control tank is used to connect to the heat exchanger. To achieve the separation of the heat exchanger from the output shaft and the suspension, the heat exchanger is distributed on the side of the output shaft bearing groove that is radially away from the electrical control tank along the drive motor. To shorten the transmission path between the outlet and the heat exchanger, this embodiment adjusts the distance between the outlet and the output shaft bearing groove to be less than the distance between the outlet and the opening of the electrical control tank. By adjusting the position of the outlet, it is coordinated with the layout scheme of the heat exchanger, oil pump, fine filter, and suspension being centrally arranged in the receiving cavity.

[0045] In one embodiment, one wall of the electrical control tank further includes an interface mounting hole for mounting an interface for transmitting signals, direct current, or alternating current. The interface mounting holes are spaced apart from the opening of another clearance slot along the stacking direction of the electrical control tank and the reducer tank, and along the axial direction of the drive motor, the interface mounting holes are distributed on the side of the outlet away from the axial bottom of the reducer tank.

[0046] In this embodiment, the interface mounting hole and the water outlet are located on the same wall of the electrical control tank. It is necessary to avoid the water outlet negatively impacting the interface installed in the interface mounting hole. The water outlet is located at the bottom of another recessed slot. Along the axial direction of the drive motor, the water outlet is closer to the reducer slot than the interface mounting hole. This other recessed slot allows the interface mounting hole and the water outlet to be staggered. By adjusting the relative positions of the water outlet and the interface mounting hole, this embodiment integrates the water outlet and the interface mounting hole onto the same wall of the electrical control tank without interfering with cooling water delivery or signal, DC, or AC power transmission. This improves the integration level of the electrical control tank.

[0047] Secondly, embodiments of this application provide an electric vehicle, which includes a power battery and a powertrain as described in any embodiment of the first aspect. The powertrain is used to receive power from the power battery and to drive the wheels of the electric vehicle.

[0048] In the embodiments of this application, the powertrain described in any of the embodiments of the first aspect is applied to an electric vehicle. By adjusting the layout of the powertrain, the space utilization rate of the powertrain is improved, which is conducive to increasing the power density of the powertrain and enhancing the working performance of the electric vehicle. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0050] Figure 1 This is a schematic diagram of the electric vehicle provided in an embodiment of this application;

[0051] Figure 2 This is a schematic diagram of the powertrain provided in an embodiment of this application;

[0052] Figure 3 This is a schematic diagram of the powertrain provided in an embodiment of this application;

[0053] Figure 4 This is a schematic diagram of the powertrain provided in an embodiment of this application;

[0054] Figure 5 This is a schematic diagram of the powertrain provided in an embodiment of this application;

[0055] Figure 6This is a schematic diagram of the powertrain provided in an embodiment of this application;

[0056] Figure 7 This is a schematic diagram of the powertrain provided in an embodiment of this application. Detailed Implementation

[0057] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0058] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] For ease of understanding, the relevant technical terms involved in the embodiments of this application will be explained and described below.

[0060] Parallelism: The parallelism defined in the embodiments of this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, allowing for situations where the parallelism is not absolute due to factors such as assembly tolerance, design tolerance, and structural flatness.

[0061] Perpendicularity: The perpendicularity defined in the embodiments of this application is not limited to an absolute perpendicular intersection relationship. It is permissible for situations where the intersection is not absolutely perpendicular due to factors such as assembly tolerance, design tolerance, and structural flatness. It is permissible for errors within a small angle range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0062] Currently, powertrains face the problem of large size, which hinders miniaturization design. This application provides a powertrain whose housing includes a motor slot, a reducer slot, a mount mounting hole, an oil pump slot, a fine filter slot, and multiple heat exchanger mounting holes. The motor slot accommodates the powertrain's drive motor, and the reducer slot accommodates the reducer. The mount mounting holes are used to mount the suspension, the oil pump slot accommodates the oil pump, the fine filter slot accommodates the fine filter, and the multiple heat exchanger mounting holes are used to mount the heat exchangers. The oil pump receives oil from the reducer slot. The fine filter receives oil delivered by the oil pump. The heat exchangers receive oil delivered by the fine filter and cool the oil.

[0063] The slot opening of the reducer along the axial direction of the drive motor faces away from the slot opening of the motor. The bottom of the reducer slot includes an output shaft bearing slot, which is used to fix the outer ring of the reducer's output shaft bearing. The reducer's output shaft is used to fix the inner ring of the output shaft bearing.

[0064] The suspension mounting holes, oil pump slot, fine filter slot, and multiple heat exchanger mounting holes are distributed on the outer side of the axial bottom of the reducer slot and the outer side of the circumferential wall of the motor slot. The suspension mounting holes, fine filter slot, and oil pump slot surround the output shaft bearing slot along the circumferential direction of the drive motor, and the openings of the multiple heat exchanger mounting holes are spaced apart from the slot opening of at least one of the oil pump slot or fine filter slot along the axial direction of the drive motor.

[0065] This embodiment of the application, by adjusting the layout of the oil pump slot, the fine filter slot, and multiple heat exchanger fixing holes and suspension fixing holes, can concentrate the oil pump, fine filter, and heat exchanger in the space enclosed by the axial bottom of the reducer slot and the circumferential wall of the motor slot while achieving the avoidance of the heat exchanger and suspension. This is beneficial to reduce the overall size of the powertrain and improve the power density of the powertrain.

[0066] Please see Figure 1 , Figure 1 This is a schematic diagram of an electric vehicle 1 provided in an embodiment of this application. In one embodiment, the electric vehicle 1 includes a powertrain 10 and a power battery 20. In this embodiment, the electric vehicle 1 refers to a wheeled device driven or towed by a power unit. The power battery 20 is used to supply power to the powertrain 10; the power battery 20 can also be called a battery pack. The powertrain 10 is the power source of the electric vehicle 1 and is used to drive the wheels 40 of the electric vehicle 1. In one embodiment, the electric vehicle 1 further includes a frame 30, which is used to mount the powertrain 10 and the power battery 20. The frame 30 is the structural skeleton of the electric vehicle 1 and can withstand the loads from the internal and external environment of the electric vehicle 1.

[0067] Please see Figure 2 , Figure 2 This is a schematic diagram of a powertrain 10 provided in an embodiment of this application. In one embodiment, the powertrain 10 includes a drive motor 11, a reducer 12, and a motor controller 13. A power battery supplies power to the drive motor 11 via the motor controller 13. Specifically, the motor controller 13 converts the direct current supplied by the power battery into alternating current and delivers the alternating current to the drive motor 11. The drive motor 11 is connected to the reducer 12 to drive the wheels to rotate. In one embodiment, the motor controller 13 controls the drive motor 11 and the reducer 12. It should be noted that... Figure 2This illustration only shows the electrical connection between the motor controller of the powertrain 10 and the power battery, and the transmission relationship between the drive motor and the reducer of the powertrain. It does not represent the actual structure, size and positional relationship of the powertrain 10 and the wheel 40.

[0068] The drive motor 11 converts electrical energy into mechanical energy to generate driving torque. In one embodiment, the drive motor includes a stator, a rotor, and a shaft. Alternating current is applied to the windings of the stator to generate alternating magnetic flux. The alternating magnetic flux generated by the windings interacts with the permanent magnet flux generated by the rotor, causing the rotor to rotate relative to the stator. The rotor is fixedly connected to the shaft, allowing the shaft to rotate with the rotor. The stator is rotatably connected to the shaft, enabling the shaft to rotate relative to the stator and convert electrical energy into mechanical energy. The shaft transmits mechanical energy to the reducer.

[0069] The reducer 12 is used to change the transmission ratio between the drive motor 11 and the wheel 40. In one embodiment, the reducer 12 includes a gear shaft assembly and a differential 1203. The shaft of the gear shaft assembly includes an input shaft, an intermediate shaft, and an output shaft 1201. The gears of the gear shaft assembly include an input gear, an intermediate driven gear, an intermediate driving gear, and an output gear. The bearings of the gear shaft assembly include an input shaft bearing, an intermediate shaft bearing, and an output shaft bearing 1202. The input gear and the input shaft bearing are fixed to the input shaft. The intermediate driven gear, the intermediate driving gear, and the intermediate shaft bearing are fixed to the intermediate shaft. The output gear and the output shaft bearing 1202 are fixed to the differential 1203. The output shaft 1201 is drive-connected to the differential 1203. The motor shaft of the drive motor is used to transmit torque to the input shaft and the input gear. The input gear meshes with the intermediate driven gear. The intermediate driven gear drives the intermediate shaft and the intermediate driving gear to rotate. The intermediate driving gear meshes with the output gear, and the output gear drives the differential 1203 to rotate. The differential 1203 is used to transmit torque to the output shaft 1201 to drive the wheels 40 to rotate, enabling the electric vehicle to move forward or backward.

[0070] In one embodiment, the powertrain 10 further includes an on-board charger 14 and a DC-DC converter 15. The on-board charger 14 is used to transfer electrical energy from an external power source to charge the power battery or to supply power to the vehicle's load. The external power source can be an AC power grid, an AC charging station, or a DC charging station. The DC-DC converter 15 is used to change the voltage of the DC power to meet the power requirements of different loads. In one embodiment, the on-board charger 14 is used to convert high-voltage AC power into high-voltage DC power before transmitting it to the DC-DC converter 15.

[0071] During the operation of the powertrain, the motor controller and drive motor generate heat, and the gear shaft assembly of the reducer may wear. Oil pumps, fine filters, and heat exchangers are typically used to cool and lubricate the components in the powertrain. Currently, the layout of oil pumps, fine filters, and heat exchangers within the powertrain results in a significant space requirement, which is detrimental to controlling the overall size of the powertrain.

[0072] The embodiments of this application improve the spatial utilization of the powertrain by improving the positional layout of the oil pump, fine filter, and heat exchanger with adjacent structures or devices, which helps to achieve the miniaturization design of the powertrain.

[0073] The powertrain 10 provided in this application is described in detail below.

[0074] Please refer to the following: Figures 2 to 4 , Figure 3 This is a schematic diagram of the powertrain 10 provided in an embodiment of this application. Figure 4 This is a schematic diagram of the powertrain provided in an embodiment of this application.

[0075] In one embodiment, the housing 100 of the powertrain 10 includes a motor slot 110, a reducer slot 120, a mounting hole 130, an oil pump slot 140, a fine filter slot 150, and a plurality of heat exchanger mounting holes 160. The motor slot 110 is used to accommodate the drive motor 11 of the powertrain 10, and the reducer slot 120 is used to accommodate the reducer 12 of the powertrain 10. Along the axial direction of the drive motor 11, the slot opening of the reducer slot 120 faces away from the slot opening of the motor slot 110. The bottom of the axial slot of the reducer slot 120 includes an output shaft bearing slot 121, which is used to fix the output shaft bearing 1202 of the reducer 12.

[0076] The suspension mounting hole 130 is used to fix the suspension 16, the oil pump groove 140 is used to accommodate the oil pump 17, the fine filter groove 150 is used to accommodate the fine filter 18, and multiple heat exchanger mounting holes 160 are used to fix the heat exchanger 19. The suspension mounting hole 130, oil pump groove 140, fine filter groove 150, and multiple heat exchanger mounting holes 160 are distributed on the outer side of the axial groove bottom of the reducer groove 120 and on the outer side of the circumferential groove wall of the motor groove 110. The suspension mounting hole 130, fine filter groove 150, and oil pump groove 140 surround the output shaft bearing groove 121 along the circumferential direction C of the drive motor 11, and the openings of the multiple heat exchanger mounting holes 160 are spaced apart from the groove opening of at least one of the oil pump groove 140 or the fine filter groove 150 along the axial direction O of the drive motor 11.

[0077] In this embodiment, the motor slot 110 and the reducer slot 120 are integrated into the housing 100 of the powertrain 10. The slot opening of the motor slot 110 faces away from the slot opening of the reducer slot 120, making the drive motor 11 and the reducer 12 arranged compactly, which helps to reduce the overall volume of the powertrain 10. The motor slot 110 encloses the motor cavity, and the drive motor 11 is located within the motor cavity. The reducer slot 120 encloses the reducer cavity, and the reducer 12 is located within the reducer cavity. The output shaft bearing slot 121 can also be called the output shaft bearing seat. The output shaft bearing slot 121 is located at the axial bottom of the reducer slot 120, where the axial bottom of the reducer slot 120 refers to the bottom of the reducer slot 120 along the axial direction O of the drive motor 11. In one embodiment, the output shaft bearing slot 121 is spaced apart from the motor slot 110.

[0078] In this embodiment, the powertrain 10 housing 100 also integrates a mount mounting hole 130, an oil pump groove 140, a fine filter groove 150, and multiple heat exchanger mounting holes 160. The mount mounting hole 130 is used to mount a suspension 16, which is used to connect to the vehicle frame. In one embodiment, the mount mounting holes 130 are distributed at the bottom of the axial groove of the reducer groove 120, enabling the connection between the reducer groove 120 and the vehicle frame. In another embodiment, the powertrain 10 housing 100 includes multiple mount mounting holes 130.

[0079] In this embodiment, the oil pump tank 140 is used to house the oil pump 17, which powers the oil to deliver it to the fine filter 18. In one embodiment, the oil pump 17 is also used to deliver oil to the reducer tank 120 to lubricate the gear shaft assembly of the reducer 12.

[0080] In this embodiment, the fine filter tank 150 is used to house the fine filter 18, which is used to filter the oil to prevent impurities in the oil from affecting the normal operation of the powertrain 10. The fine filter 18 is also used to transport the filtered oil to the heat exchanger 19.

[0081] In this embodiment, the heat exchanger mounting hole 160 is used to fix the heat exchanger 19, which uses cooling water to cool the oil. The heat exchanger 19 is also used to transport the cooled oil to the motor slot 110 to cool the motor stator and motor rotor of the drive motor 11.

[0082] In this embodiment, the positional relationship of the oil pump slot 140, the fine filter slot 150, and the heat exchanger fixing hole 160 reflects the positional relationship of the oil pump 17, the fine filter 18, and the heat exchanger 19. If the oil pump slot 140, the fine filter slot 150, and the heat exchanger fixing hole 160 are separately arranged at different positions on the housing 100 of the powertrain 10, in order to reduce the overall volume of the powertrain 10, it may be necessary to adjust multiple structures or components at different positions of the powertrain 10 to respectively accommodate the fixing of the oil pump 17, the fine filter 18, and the heat exchanger 19. In this embodiment, the oil pump slot 140, the fine filter slot 150, and the heat exchanger fixing hole 160 are concentrated in the same area, which can reduce structural modifications or changes in component positions of the powertrain 10, which is beneficial to reducing the layout difficulty of the oil pump 17, the fine filter 18, and the heat exchanger 19 in the powertrain 10, and can also shorten the transmission path of oil between the oil pump 17, the fine filter 18, and the heat exchanger 19.

[0083] In this embodiment, the groove opening of the motor slot 110 along the axial direction of the drive motor 11 faces away from the groove opening of the reducer slot 120. The circumferential groove wall of the motor slot 110 and the axial groove bottom of the reducer slot 120 are used to form a receiving cavity 101. The drive motor 11 and the reducer 12 are respectively distributed in the motor cavity and the reducer cavity, and the receiving cavity 101 is spaced apart from the motor cavity and the reducer cavity. The oil pump slot 140, the fine filter slot 150, and the heat exchanger fixing hole 160 are distributed on the outer side of the circumferential groove wall of the motor slot 110 and the outer side of the axial groove bottom of the reducer slot 120, which is equivalent to the oil pump 17, the fine filter 18, and the heat exchanger 19 being distributed in the receiving cavity 101. This can improve the space utilization of the receiving cavity 101 without interfering with the layout of the drive motor 11 and the reducer 12. By centrally arranging the oil pump slot 140, the fine filter slot 150, and the heat exchanger fixing hole 160 on the outer side of the circumferential slot wall of the motor slot 110 and the outer side of the axial slot bottom of the reducer slot 120, the overall size of the powertrain 10 can be extended beyond the motor slot 110 and the reducer slot 120, which is conducive to the miniaturization of the powertrain 10 and also facilitates the connection between the oil pump 17, the fine filter 18, and the heat exchanger 19 and the motor slot 110 and the reducer slot 120.

[0084] In this embodiment, the mounting holes 130 are also distributed on the outer side of the circumferential groove wall of the motor groove 110 and the outer side of the axial groove bottom of the reducer groove 120. Currently, the mounting holes 130 used to fix the reducer 12 to the frame are usually around the outer periphery of the output shaft bearing groove 121. Therefore, a problem that may arise when arranging the oil pump 17, the fine filter 18, and the heat exchanger 19 in the receiving cavity 101 is how to avoid misalignment with the mounting 16. If the oil pump groove 140, the fine filter groove 150, the heat exchanger mounting hole 160, and the mounting holes 130 are sequentially arranged around the outer periphery of the output shaft bearing groove 121, the layout of the mounting 16 and the heat exchanger 19 may interfere with each other, since the size of the mounting 16 and the heat exchanger 19 is usually large. In this embodiment, the oil pump slot 140, the fine filter 18, and the suspension fixing hole 130 are arranged at intervals along the circumferential direction C of the drive motor 11. The heat exchanger fixing hole 160 and the slot of at least one of the oil pump slot 140 or the fine filter slot 150 are arranged at intervals along the axial direction O of the drive motor 11, so that the heat exchanger 19 is stacked with at least one of the oil pump 17 or the fine filter 18 along the axial direction O of the drive motor 11. Utilizing the space of the oil pump 17 and the fine filter 18 along the axial direction O of the drive motor 11 to arrange the heat exchanger 19 helps to avoid misalignment between the heat exchanger 19 and the suspension 16.

[0085] In one embodiment, the oil may be any one of ethylene glycol-based cooling oil, synthetic oil, or mineral oil.

[0086] Please continue reading. Figure 3 In one embodiment, the distance between the center of one heat exchanger mounting hole 160 and the center of another heat exchanger mounting hole 160 is greater than the outer diameter of at least one of the oil pump slot 140 or the fine filter 18. Along the axial direction of the powertrain 10, the distance between the opening of each heat exchanger mounting hole 160 and the suspension mounting hole 130 is greater than the distance between the slot opening of at least one of the oil pump slot 140 or the fine filter 18 and the suspension mounting hole 130.

[0087] In the embodiments of this application, for ease of description, one heat exchanger fixing hole 160 is referred to as heat exchanger fixing hole 160a, and the other heat exchanger fixing hole 160 is referred to as heat exchanger fixing hole 160b.

[0088] In this embodiment, the distance between the center of the heat exchanger fixing hole 160a and the center of the heat exchanger fixing hole 160b is greater than the outer diameter of at least one of the oil pump slot 140 or the fine filter 18, indicating that the installation area occupied by the heat exchanger 19 is larger than that of at least one of the oil pump 17 or the fine filter 18. To avoid interference between the heat exchanger 19 and the suspension 16, the distance between the opening of the heat exchanger fixing hole 160 and the suspension fixing hole 130 is greater than the distance between the slot opening of at least one of the oil pump slot 140 or the fine filter 18 and the suspension fixing hole 130. That is, the heat exchanger 19 is distributed on the side of at least one of the oil pump 17 or the fine filter 18 away from the suspension 16, which helps to save the installation area of ​​the suspension 16, the oil pump 17 and the fine filter 18 and reduce the layout difficulty.

[0089] Please continue reading. Figure 3 In one embodiment, the orientation of the oil pump slot 140, the orientation of the fine filter slot 150, and the orientation of the openings of the plurality of heat exchanger mounting holes 160 are parallel.

[0090] In this embodiment, the orientation of the oil pump slot 140, the orientation of the fine filter slot 150, and the orientation of the heat exchanger fixing hole 160 correspond to the installation directions of the oil pump 17, the fine filter 18, and the heat exchanger 19, respectively. The fact that the oil pump 17, the fine filter 18, and the heat exchanger 19 are installed in the same direction avoids repeatedly rotating the power assembly 10 during installation. With the power assembly 10 in the same orientation, the installation of the oil pump 17, the fine filter 18, and the heat exchanger 19 can be completed, which helps reduce installation costs and difficulty.

[0091] Please continue reading. Figure 3 In one embodiment, the suspension mounting hole 130, oil pump groove 140, fine filter groove 150, and multiple heat exchanger mounting holes 160 are distributed on the outer wall of the axial groove bottom of the reducer groove 120. The groove opening of the oil pump groove 140, the groove opening of the fine filter groove 150, and the opening orientation of the multiple heat exchanger mounting holes 160 are parallel to the axial direction O of the drive motor 11.

[0092] In this embodiment, the oil pump slot 140, the fine filter slot 150, and the heat exchanger fixing hole 160 extend from the axial bottom of the reducer slot 120 along the axial direction O of the drive motor 11. The extension direction of the oil pump slot 140, the fine filter slot 150, and the heat exchanger fixing hole 160 is parallel to the extension direction of the motor slot 110, which is beneficial to improve the utilization rate of the space outside the circumferential slot wall of the motor slot 110 and reduce the volume of the powertrain 10.

[0093] Please refer to the following: Figure 2 and Figure 3In one embodiment, the bottom of the output shaft bearing groove 121 includes a shaft hole 122 extending along the axial direction O of the drive motor 11, the shaft hole 122 being for the output shaft 1201 of the reducer 12 to pass through. The groove opening of the output shaft bearing groove 121 faces away from the groove opening of the oil pump groove 140 and the groove opening of the fine filter groove 150.

[0094] The bottom and part of the wall of the output shaft bearing groove 121 along the axial direction of the drive motor 11 protrude relative to the opening of the oil pump groove 140 and the opening of the fine filter groove 150. The oil pump groove 140 and the fine filter groove 150 are located on the outer periphery of part of the wall of the output shaft bearing groove 121.

[0095] In this embodiment, the output shaft 1201 of the reducer 12 extends out of the reducer groove 120 through the shaft hole 122 from the output shaft bearing groove 121. A portion of the output shaft 1201 is distributed on the outer side of the axial groove bottom of the reducer groove 120 and the outer side of the circumferential groove wall of the motor groove 110. The groove bottom and a portion of the groove wall of the output shaft bearing groove 121 protrude outwards towards the outer side of the axial groove bottom of the reducer groove 120, thus protecting the output shaft 1201. Arranging the oil pump groove 140 and the fine filter groove 150 on the outer circumferential side of the groove bottom and a portion of the groove wall of the output shaft bearing groove 121 protruding along the axial direction O of the drive motor 11 allows for reuse of the space on the outer circumferential side of the groove bottom and a portion of the groove wall of the output shaft bearing groove 121.

[0096] Please continue reading. Figure 3 In one embodiment, the distance between the center of at least one heat exchanger mounting hole 160 and the center of the shaft hole 122 is greater than the distance between the center of at least one of the oil pump tank 140 or the fine filter tank 150 and the center of the shaft hole 122.

[0097] In this embodiment, the output shaft rotates at high speed during operation to transmit torque to the wheels. Heat exchanger mounting holes 160 are distributed on at least one of the oil pump slots 140 or the fine filter slots 150 along the axial direction O of the drive motor 11, away from the suspension mounting holes 130, i.e., along the axial direction O of the drive motor 11. Heat exchangers 19 are distributed on the outer side of at least one of the oil pumps 17 or the fine filter 18. In this embodiment, the distance between the center of at least one heat exchanger mounting hole 160 and the center of the shaft hole 122 is greater than the distance between the center of at least one of the oil pump slots 140 or the fine filter slots 150 and the center of the shaft hole 122, ensuring a safe distance between the heat exchanger 19 and the output shaft, thus preventing interference with the normal operation of the output shaft.

[0098] Please refer to the following: Figure 4 and Figure 5 , Figure 5This is a schematic diagram of the powertrain 10 provided in an embodiment of this application. In one embodiment, a heat exchanger 19 is used to connect to a fine filter 18. Along the axial direction of the drive motor 11, the distance between the opening of the fine filter groove 150 and the bottom of the output shaft bearing groove 121 is less than the distance between the opening of the oil pump groove 140 and the bottom of the output shaft bearing groove 121. A plurality of heat exchanger mounting holes 160 surround the outer periphery of the fine filter groove 150, and along the axial direction of the drive motor 11, the heat exchangers 19 are distributed on the side of the fine filter 18 opposite to the reducer groove 120.

[0099] In this embodiment, the heat exchanger 19 is used to receive the oil filtered by the fine filter 18. The heat exchanger 19 and the fine filter 18 are arranged along the axial direction O of the drive motor 11, which helps to shorten the oil transmission path, reduce the power loss of the oil in the transmission path, and also reduce the installation area occupied on the outer wall of the axial groove bottom of the reducer groove 120.

[0100] In this embodiment, since the heat exchanger 19 is located on the side of the fine filter 18 away from the reducer slot 120, it is necessary to avoid the heat exchanger 19 protruding too much along the axial direction O of the drive motor 11, and to control the axial space occupied by the heat exchanger 19 and the fine filter 18 in the receiving cavity 101. The fine filter slot 150 and the oil pump slot 140 surround the outer periphery of the output shaft bearing slot 121. The axial distance between the opening of the fine filter slot 150 and the bottom of the output shaft bearing slot 121 is smaller than the axial distance between the opening of the oil pump slot 140 and the bottom of the output shaft bearing slot 121. This means that along the axial direction O of the drive motor 11, the fine filter 18 is closer to the reducer cavity than the oil pump 17, resulting in a relatively larger space on the side of the fine filter 18 away from the reducer slot 120. In this embodiment, when the heat exchanger 19 and the fine filter 18 are stacked along the axial direction O of the drive motor 11, the axial dimension of the powertrain 10 is not additionally extended.

[0101] Please continue reading. Figure 3 and Figure 5 In one embodiment, the housing 100 of the powertrain 10 further includes a heat exchanger mounting surface 170 and two heat exchange holes 180. The heat exchanger mounting surface 170 is distributed on the outer wall of the axial groove bottom of the reducer groove 120, and a plurality of heat exchanger fixing holes 160 and two heat exchange holes 180 are distributed on the heat exchanger mounting surface 170.

[0102] One heat exchange hole 180 is used to connect the outlet of the fine filter 18 and the inlet of the heat exchanger 19, and the other heat exchange hole 180 is used to connect the outlet of the heat exchanger 19 and the motor slot 110. The vertical distance between the center of the other heat exchange hole 180 and the axis of the motor slot 110 is less than the vertical distance between the center of the first heat exchange hole 180 and the axis of the motor slot 110.

[0103] In the embodiments of this application, for ease of description, one heat exchange hole 180 is referred to as heat exchange hole 180a, and the other heat exchange hole 180 is referred to as heat exchange hole 180b.

[0104] In this embodiment, two heat exchange holes 180 and multiple heat exchanger mounting holes 160 are distributed on the same heat exchanger mounting surface 170, which helps to reduce the axial space occupied by the heat exchanger mounting holes 160 and the heat exchanger 19. The heat exchanger 19 receives oil from the fine filter 18 through the heat exchange hole 180a and delivers oil to the motor slot 110 through the heat exchange hole 180b. The distance between the center of the heat exchange hole 180b and the motor slot 110 is smaller than the distance between the center of the heat exchange hole 180a and the motor slot 110, which helps to reduce the power loss of oil transmission between the heat exchanger 19 and the motor slot 110 and improve cooling efficiency.

[0105] Please refer to the following: Figure 3 and Figure 6 , Figure 6 This is a schematic diagram of the powertrain 10 provided in an embodiment of this application. In one embodiment, an oil pump slot 140 is arranged between a heat exchange hole 180b and a motor slot 110. The heat exchange hole 180b is connected to the motor slot 110 through an internal housing flow channel 102, which connects the heat exchange hole 180b and the motor slot 110. An internal housing flow channel 102 is distributed inside the axial groove bottom of the reducer slot 120, and is arranged between the output shaft bearing slot 121 and the oil pump slot 140.

[0106] In the embodiments of this application, for ease of description, an internal flow channel 102 of the housing is referred to as internal flow channel 102a.

[0107] In this embodiment, the heat exchanger 19 and the fine filter 18 are stacked along the axial direction O of the drive motor 11. Since the heat exchanger 19 occupies a relatively large installation space, the heat exchanger 19 is far away from the motor slot 110 relative to the oil pump 17, which facilitates the separation of the heat exchanger 19 from the motor slot 110 and reduces the difficulty of arranging the oil pump 17, the fine filter 18 and the heat exchanger 19 in a concentrated manner.

[0108] In this embodiment, the heat exchanger 19 is connected to the motor slot 110 via an internal flow channel 102a. The internal flow channel 102a is located inside the axial bottom of the reducer slot 120, which avoids interference with the installation of the oil pump 17, the fine filter 18, and the heat exchanger 19, and reduces the installation space occupied by the internal flow channel 102a. The internal flow channel 102a is arranged between the output shaft bearing slot 121 and the oil pump slot 140, which helps to control the length of the internal flow channel 102a and shorten the oil transmission path.

[0109] Please continue reading. Figure 3and Figure 6 In one embodiment, heat exchange holes 180a are distributed between heat exchanger fixing holes 160a and fine filter tank 150. The bottom of the fine filter tank 150 includes a liquid outlet hole 151 and a protrusion 152. The heat exchange holes 180a are connected to the liquid outlet hole 151 through another internal flow channel 102. The opening direction of the liquid outlet hole 151 and the protruding direction of the protrusion 152 are opposite to the reducer tank 120 along the axial direction of the drive motor 11. The other internal flow channel 102 is distributed inside the protrusion 152.

[0110] In the embodiments of this application, for ease of description, the other internal flow channel 102 of the housing is referred to as internal flow channel 102b of the housing.

[0111] In this embodiment, the bottom of the fine filter tank 150 includes an outlet hole 151 and a protrusion 152. The heat exchanger 19 is connected to the outlet hole 151 of the fine filter tank 150 through an internal flow channel 102b. In one embodiment, the outlet hole 151 of the fine filter tank 150 is used to connect to the outlet of the fine filter 18. The protrusion 152 protrudes from the bottom of the fine filter tank 150 along the axial direction O of the drive motor 11 away from the reducer tank 120. Since the fine filter tank 150 is closer to the inner cavity of the reducer tank 120 than the oil pump tank 140, the internal flow channel 102b is distributed inside the protrusion 152 at the bottom of the fine filter tank 150, which can reduce the space occupied by the internal flow channel 102b in the inner cavity of the reducer tank 120 and avoid negative impact on the layout of the reducer 12. In one embodiment, the length of the protrusion 152 along the axial direction of the drive motor 11 is less than the length of the fine filter groove 150, which avoids the protrusion 152 occupying too much space in the fine filter groove 150 and is also beneficial for controlling the flow rate and velocity of the oil in the internal flow channel 102b of the housing. In one embodiment, the protrusion 152 and the fine filter groove 150 are integrally die-cast.

[0112] Please refer to the following: Figures 2 to 4 In one embodiment, the housing 100 of the powertrain 10 further includes an electrical control slot 190 for accommodating at least two of the powertrain 10's motor controller 13, on-board charger 14, and DC-DC converter 15. The electrical control slot 190 is stacked on top of the reducer slot 120 and the motor slot 110, with a portion of the bottom of the electrical control slot 190 protruding relative to the circumferential wall of the motor slot 110 and the axial bottom of the reducer slot 120. A portion of the bottom of the electrical control slot 190, the circumferential wall of the motor slot 110, and the axial bottom of the reducer slot 120 form a receiving cavity 101 for accommodating the oil pump 17, the fine filter 18, and the heat exchanger 19.

[0113] In this embodiment, the electrical control slot 190 is integrated into the housing 100 of the powertrain 10, and the electrical control slot 190 is used to enclose an electrical control cavity. In one embodiment, the stacking direction A of the electrical control slot 190 and the reducer slot 120 is perpendicular to the axial direction O of the drive motor 11. A portion of the bottom of the electrical control slot 190 protrudes relative to the axial bottom of the reducer slot 120 and the circumferential wall of the motor slot 110, and the portion of the bottom of the electrical control slot 190, together with the axial bottom of the reducer slot 120 and the circumferential wall of the motor slot 110, encloses a receiving cavity 101. The oil pump slot 140, the fine filter slot 150, and the heat exchanger fixing hole 160 are arranged on the outer side of the portion of the bottom of the electrical control slot 190, the outer side of the axial bottom of the reducer slot 120, and the outer side of the circumferential wall of the motor slot 110. Integrating the electrical control slot 190, motor slot 110, and reducer slot 120 into the housing 100 of the powertrain 10 allows the powertrain 10 to have its own dimensions in different directions. The unused space in the receiving cavity 101 is used to accommodate the oil pump 17, fine filter 18, and heat exchanger 19. This avoids extending the size of the powertrain 10 based on the electrical control slot 190, motor slot 110, and reducer slot 120, which helps to reduce the overall volume of the powertrain 10.

[0114] In this embodiment, the electrical control slot 190 is used to accommodate at least two of the motor controller 13, the on-board charger 14, and the DC-DC converter 15. While improving the integration of the powertrain 10, the bottom area of ​​the electrical control slot 190 is increased, which is beneficial to expanding the space of the accommodating cavity 101 and reducing the layout difficulty of the oil pump 17, the fine filter 18, and the heat exchanger 19.

[0115] Please continue reading. Figure 3 and Figure 4 In one embodiment, a portion of the bottom of the electrical control slot 190 includes a recessed groove 191a, which is recessed toward the opening of the electrical control slot 190 along the stacking direction A of the electrical control slot 190 and the reducer slot 120. A portion of the suspension fixing holes 130 are distributed in the recessed groove 191a, and the distance between the portion of the suspension fixing holes 130 and the opening of the electrical control slot 190 along the stacking direction A of the electrical control slot 190 and the reducer slot 120 is less than the distance between the center of the output shaft bearing slot 121 and the opening of the electrical control slot 190.

[0116] In this embodiment, along the stacking direction A of the electrical control slot 190 and the reducer slot 120, the slot opening of the electrical control slot 190 faces away from the reducer slot 120 and the motor slot 110. The suspension 16, oil pump 17, fine filter 18, and heat exchanger 19 are distributed in the receiving cavity 101. Since the suspension 16 typically occupies a large space, its layout can be adjusted by changing the bottom structure of the electrical control slot 190. Specifically, the portion of the bottom of the electrical control slot 190 used to form the receiving cavity 101 includes a recessed groove 191a, which is recessed towards the slot opening of the electrical control slot 190. Arranging a portion of the suspension fixing holes 130 within the recessed groove 191a allows for more space on the outer periphery of the output shaft bearing slot 121 for arranging the oil pump 17, fine filter 18, and heat exchanger 19. This facilitates the avoidance of the oil pump 17, fine filter 18, and heat exchanger 19 from the suspension 16, reducing layout complexity.

[0117] Please see Figure 7 , Figure 7 This is a schematic diagram of the powertrain 10 provided in an embodiment of this application. In one embodiment, along the stacking direction of the electronic control slot 190 and the reducer slot 120, the oil pump 17, the fine filter 18, and the heat exchanger 19 are distributed within the projection of a portion of the bottom of the electronic control slot 190.

[0118] In this embodiment, a portion of the bottom of the electrical control slot 190 is used to form a receiving cavity 101. Along the stacking direction A of the electrical control slot 190 and the reducer slot 120, the oil pump 17, the fine filter 18, and the heat exchanger 19 are distributed within the projection of a portion of the bottom of the electrical control slot 190. This centralized arrangement of the oil pump 17, the fine filter 18, and the heat exchanger 19 avoids increasing the size of the powertrain 10 based on the housing 100 of the powertrain 10, which is beneficial for optimizing the layout of the powertrain 10 in the vehicle and improving the power density of the powertrain 10.

[0119] Please continue reading. Figure 3 and Figure 4 In one embodiment, the heat exchanger 19 receives cooling water supplied from the outlet 192 of the electrical control tank 190 via a water pipe 103. One wall of the electrical control tank 190 is connected to a portion of its bottom. This wall includes a recessed groove 191b, which faces the reducer slot 120 along the axial direction of the drive motor 11. The recessed groove 191b accommodates a portion of the water pipe 103, and the outlet 192 is located at the bottom of the recessed groove 191b.

[0120] In this embodiment, when the powertrain 10 is in operation, the heat generated by the motor controller 13 is typically less than that of the drive motor 11. The heat exchanger 19 utilizes cooling water from the electrical control tank 190 to cool the oil, thereby enhancing the cooling effect on the drive motor 11 and improving the utilization rate of the cooling water. The heat exchanger 19 receives cooling water from the outlet 192 of the electrical control tank 190 via a water pipe 103. Since the heat exchanger 19 and at least one of the oil pump 17 or the fine filter 18 are stacked along the axial direction O of the drive motor 11, it is necessary to avoid the water pipe 103 additionally increasing the axial dimension of the powertrain 10. In this embodiment, one wall of the electrical control tank 190 is connected to a portion of the bottom of the electrical control tank 190, and the receiving cavity 101 is adjacent to one wall of the electrical control tank 190. One wall of the electrical control tank 190 includes a recessed groove 191b, which is recessed toward the reducer tank 120 along the axial direction O of the drive motor 11. The water outlet 192 is distributed at the bottom of the recessed groove 191b, and part of the water pipe 103 is distributed in the recessed groove 191b. This helps to prevent the water pipe 103 from protruding too much in the axial direction O of the drive motor 11 and reduces the axial space occupied by the water pipe 103 in the receiving cavity 101.

[0121] Please continue reading. Figure 3 In one embodiment, the distance between the outlet 192 and the wall of the output shaft bearing groove 121 along the stacking direction A of the electrical control groove 190 and the reducer groove 120 is less than the distance between the outlet 192 and the groove opening of the electrical control groove 190.

[0122] In this embodiment, the outlet 192 of the electrical control tank 190 is used to connect to the heat exchanger 19. To achieve the separation of the heat exchanger 19 from the output shaft 1201 and the suspension 16, the heat exchanger 19 is distributed on the side of the output shaft bearing groove 121 that is radially away from the electrical control tank 190 along the drive motor 11. To shorten the transmission path between the outlet 192 and the heat exchanger 19, this embodiment adjusts the distance between the outlet 192 and the groove wall of the output shaft bearing groove 121 to be less than the distance between the outlet 192 and the groove opening of the electrical control tank 190. By adjusting the position of the outlet 192, it is coordinated with the layout scheme in which the heat exchanger 19, the oil pump 17, the fine filter 18, and the suspension 16 are concentrated in the receiving cavity 101.

[0123] Please continue reading. Figure 3 In one embodiment, one wall of the electrical control slot 190 further includes an interface mounting hole 193 for mounting an interface for transmitting signals, direct current, or alternating current. The interface mounting holes 193 and the slot openings of the clearance slots 191b are arranged at intervals along the stacking direction A of the electrical control slot 190 and the reducer slot 120, and along the axial direction O of the drive motor 11, the interface mounting holes 193 are distributed on the side of the outlet 192 away from the bottom of the axial direction of the reducer slot 120.

[0124] In this embodiment, the interface mounting hole 193 and the water outlet 192 are located on the same wall of the electrical control tank 190. It is necessary to avoid the water outlet 192 negatively impacting the interface installed in the interface mounting hole 193. The water outlet 192 is located at the bottom of the recessed groove 191b. Along the axial direction of the drive motor 11, the water outlet 192 is closer to the reducer groove 120 than the interface mounting hole 193. The recessed groove 191b allows the interface mounting hole 193 and the water outlet 192 to be staggered. By adjusting the relative positions of the water outlet 192 and the interface mounting hole 193, this embodiment integrates the water outlet 192 and the interface mounting hole 193 onto the same wall of the electrical control tank 190 without affecting the cooling water supply or the transmission of signals, DC power, or AC power. This improves the integration level of the electrical control tank 190.

[0125] The powertrain and electric vehicle provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and embodiments of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in specific embodiments and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A powertrain, characterized by, The powertrain housing includes a motor slot, a reducer slot, a mounting hole, an oil pump slot, a fine filter slot, and multiple heat exchanger mounting holes. The motor slot accommodates the drive motor of the powertrain, and the reducer slot accommodates the reducer of the powertrain. Along the axial direction of the drive motor, the opening of the reducer slot faces away from the opening of the motor slot. The bottom of the reducer slot includes an output shaft bearing slot, which is used to fix the output shaft bearing of the reducer. Wherein: The suspension fixing hole is used to fix the suspension, the oil pump slot is used to accommodate the oil pump, the fine filter slot is used to accommodate the fine filter, and the plurality of heat exchanger fixing holes are used to fix the heat exchanger. The suspension fixing hole, the oil pump slot, the fine filter slot, and the plurality of heat exchanger fixing holes are distributed on the outer side of the axial bottom of the reducer slot and on the outer side of the circumferential wall of the motor slot. The suspension fixing hole, the fine filter slot, and the oil pump slot surround the output shaft bearing slot along the circumferential direction of the drive motor. The openings of the plurality of heat exchanger fixing holes are spaced apart from the opening of at least one of the oil pump slots or the fine filter slots along the axial direction of the drive motor.

2. The powertrain of claim 1, wherein, The distance between the center of one heat exchanger mounting hole and the center of the other heat exchanger mounting hole is greater than the outer diameter of at least one of the oil pump slots or the fine filter. The distance between the opening of each heat exchanger mounting hole and the suspension mounting hole along the axial direction of the powertrain is greater than the distance between the slot opening of at least one of the oil pump slots or the fine filter and the suspension mounting hole.

3. The powertrain of claim 1, wherein, The openings of the oil pump tank, the fine filter tank, and the multiple heat exchanger fixing holes are parallel to each other.

4. The powertrain of claim 3, wherein, The suspension fixing hole, the oil pump groove, the fine filter groove, and the plurality of heat exchanger fixing holes are distributed on the outer wall of the axial groove bottom of the reducer groove. The groove opening of the oil pump groove, the groove opening of the fine filter groove, and the opening orientation of the plurality of heat exchanger fixing holes are parallel to the axial direction of the drive motor.

5. The powertrain according to any one of claims 1-4, characterized in that, The bottom of the output shaft bearing groove includes a shaft hole extending axially along the drive motor, the shaft hole for the output shaft of the reducer to pass through. The groove opening of the output shaft bearing groove faces away from the groove openings of the oil pump groove and the fine filter groove, wherein: Along the axial direction of the drive motor, the bottom and part of the groove wall of the output shaft bearing groove protrude relative to the groove opening of the oil pump groove and the groove opening of the fine filter groove. The oil pump groove and the fine filter groove are distributed on the outer peripheral side of the part of the groove wall of the output shaft bearing groove.

6. The powertrain according to claim 5, characterized in that, The distance between the center of at least one of the heat exchanger fixing holes and the center of the shaft hole is greater than the distance between the center of at least one of the oil pump tank or the fine filter tank and the center of the shaft hole.

7. The powertrain according to claim 5, characterized in that, The heat exchanger is used to connect the fine filter. The distance between the groove opening of the fine filter groove and the bottom of the output shaft bearing groove along the axial direction of the drive motor is less than the distance between the groove opening of the oil pump groove and the bottom of the output shaft bearing groove. The plurality of heat exchanger fixing holes surround the outer periphery of the fine filter groove. Along the axial direction of the drive motor, the heat exchangers are distributed on the side of the fine filter away from the reducer groove.

8. The powertrain according to claim 7, characterized in that, The powertrain housing also includes a heat exchanger mounting surface and two heat exchange holes. The heat exchanger mounting surface is located on the outer wall of the axial groove bottom of the reducer slot. The plurality of heat exchanger fixing holes and the two heat exchange holes are located on the heat exchanger mounting surface, wherein: One of the heat exchange holes is used to connect the outlet of the fine filter and the inlet of the heat exchanger, and the other heat exchange hole is used to connect the outlet of the heat exchanger and the motor slot. The vertical distance between the center of the other heat exchange hole and the axis of the motor slot is less than the vertical distance between the center of the first heat exchange hole and the axis of the motor slot.

9. The powertrain according to claim 8, characterized in that, The oil pump slot is arranged between the other heat exchange hole and the motor slot. The other heat exchange hole is connected to the motor slot through an internal flow channel in the housing. The internal flow channel in the housing is used to connect the other heat exchange hole and the motor slot. The internal flow channel in the housing is distributed inside the axial bottom of the reducer slot. The internal flow channel in the housing is arranged between the output shaft bearing slot and the oil pump slot.

10. The powertrain according to claim 8, characterized in that, The heat exchange hole is distributed between the heat exchanger fixing hole and the fine filter tank. The bottom of the fine filter tank includes a liquid outlet hole and a protrusion. The heat exchange hole is connected to the liquid outlet hole through another internal flow channel of the housing. The opening direction of the liquid outlet hole along the axial direction of the drive motor and the protruding direction of the protrusion are away from the reducer tank. The other internal flow channel of the housing is distributed inside the protrusion.

11. The powertrain according to any one of claims 1-4 and 6-10, characterized in that, The powertrain housing also includes an electronic control slot for accommodating at least two of the powertrain's motor controller, on-board charger, and DC-DC converter. The electronic control slot is stacked on top of the reducer slot and the motor slot. A portion of the bottom of the electronic control slot protrudes relative to the circumferential wall of the motor slot and the axial bottom of the reducer slot. The portion of the bottom of the electronic control slot, the circumferential wall of the motor slot, and the axial bottom of the reducer slot form a receiving cavity for accommodating the oil pump, the fine filter, and the heat exchanger.

12. The powertrain according to claim 11, characterized in that, The bottom portion of the electrical control slot includes a recessed groove. Along the stacking direction of the electrical control slot and the reducer slot, the recessed groove is recessed toward the opening of the electrical control slot. A portion of the suspension fixing holes are distributed in the recessed groove. Along the stacking direction of the electrical control slot and the reducer slot, the distance between the portion of the suspension fixing holes and the opening of the electrical control slot is less than the distance between the center of the output shaft bearing slot and the opening of the electrical control slot.

13. The powertrain according to claim 11, characterized in that, The oil pump, the fine filter, and the heat exchanger are distributed within the projection of the bottom portion of the electrical control tank along the stacking direction of the electrical control tank and the reducer tank.

14. The powertrain according to claim 11, characterized in that, The heat exchanger receives cooling water from the outlet of the electrically controlled tank via a water pipe, wherein: One wall of the electrical control tank is connected to the portion of the bottom of the electrical control tank. The wall of the electrical control tank includes another recessed groove. Along the axial direction of the drive motor, the recessed direction of the other recessed groove faces the reducer groove. The other recessed groove is used to accommodate part of the water pipe. The water outlet is distributed at the bottom of the other recessed groove.

15. The powertrain according to claim 5, characterized in that, The powertrain housing also includes an electronic control slot for accommodating at least two of the powertrain's motor controller, on-board charger, and DC-DC converter. The electronic control slot is stacked on top of the reducer slot and the motor slot. A portion of the bottom of the electronic control slot protrudes relative to the circumferential wall of the motor slot and the axial bottom of the reducer slot. The portion of the bottom of the electronic control slot, the circumferential wall of the motor slot, and the axial bottom of the reducer slot form a receiving cavity for accommodating the oil pump, the fine filter, and the heat exchanger.

16. An electric vehicle, characterized in that, The electric vehicle includes a power battery and a powertrain as described in any one of claims 1-15, the powertrain being used to receive power from the power battery and to drive the wheels of the electric vehicle.

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