Power assembly with three cavities connected through reinforcing ribs and electric vehicle

Abstract

The utility model provides a power assembly with three cavities connected through reinforcing ribs and an electric motor.The power assembly comprises an integrated shell, the integrated shell comprises a power supply cavity, a speed reducer cavity, a motor cylinder and the reinforcing ribs which are integrally formed, and the power supply cavity is used for containing at least one electrical assembly of a motor controller, a vehicle-mounted charger and a vehicle-mounted power distribution device; the speed reducer cavity and the motor cylinder are used for containing the parallel shaft gear set and a stator of the motor respectively. Wherein the reinforcing ribs are used for connecting the power supply cavity, the speed reducer cavity and the outer wall of the motor cylinder, the reinforcing ribs and the motor cylinder are arranged on the same side of the speed reducer cavity in the axial direction of the power assembly, the reinforcing ribs and the motor cylinder are arranged in the radial direction of the power assembly, and the power supply cavity is stacked on the speed reducer cavity, the motor cylinder and the reinforcing ribs in the direction perpendicular to the axial direction of the power assembly. The reinforcing ribs support the power supply cavity, the speed reducer cavity and the shell part of the motor cylinder at the same time, the use number of the reinforcing ribs in the integrated shell is reduced, the rigidity of the integrated shell is improved, and the NVH performance of the integrated shell is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a power assembly and an electric vehicle in which three cavities are connected by reinforcing ribs. Background Art

[0002] Existing electric vehicles usually use a powertrain as a power source. The powertrain includes functional components such as a motor, a reducer and a motor controller. The powertrain has many shell structures for accommodating these functional components, so the stiffness and NVH performance of the powertrain shell need to be improved. The stiffness of the motor barrel or the reducer shell can be increased and the NVH performance can be improved by using strip-shaped reinforcement ribs, but the stiffness and NVH performance of the overall powertrain shell are not well improved. Utility Model Content

[0003] The present application provides a powertrain and an electric vehicle in which three cavities are connected by reinforcing ribs.

[0004] In the first aspect, the embodiment of the present application provides a powertrain with three cavities connected by reinforcing ribs, the powertrain includes an integrated housing, the integrated housing includes an integrally formed power supply cavity, a reducer cavity, a motor barrel and reinforcing ribs, the power supply cavity is used to accommodate at least one electrical component of a motor controller, an on-board charger and an on-board power distribution device, the reducer cavity and the motor barrel are used to accommodate the parallel shaft gear set and the stator of the motor respectively. Among them, the reinforcing ribs are used to connect the outer wall of each of the power supply cavity, the reducer cavity and the motor barrel, the reinforcing ribs and the motor barrel are arranged on the same side of the reducer cavity along the axial direction of the powertrain, the reinforcing ribs and the motor barrel are arranged along the radial direction of the powertrain, and the power supply cavity is stacked on the reducer cavity, the motor barrel and the reinforcing ribs in a direction perpendicular to the axial direction of the powertrain.

[0005] In the embodiment of the present application, the integrated housing is integrally formed and has a reliable structure. The power supply cavity is used to accommodate at least one electrical component of the motor controller, the on-board charger, and the on-board power distribution device, wherein the electrical components include a capacitor module, a power module, a circuit board, a copper busbar assembly, an inductor, a capacitor, etc. The reducer cavity is used to accommodate the parallel shaft gear set of the reducer, and the motor barrel accommodates the stator of the motor. The integrated housing is integrally formed, which is conducive to the miniaturization of the integrated housing.

[0006] In an embodiment of the present application, reinforcing ribs are used to connect the outer walls of each of the power supply cavity, the reducer cavity and the motor barrel. The reinforcing ribs are integrally formed with the power supply cavity, the reducer cavity and the motor barrel. The reinforcing ribs simultaneously provide support and reinforcement for the outer walls of the three cavities, namely, the power supply cavity, the reducer cavity and the motor barrel, which is beneficial to reducing the number of reinforcing ribs used in the integrated shell, improving the rigidity of the integrated shell, and improving the NVH performance of the integrated shell.

[0007] In the embodiment of the present application, the reinforcing ribs and the motor barrel are arranged on the same side of the reducer cavity along the axial direction of the powertrain, which is conducive to the reinforcing ribs supporting and strengthening the reducer cavity and the motor barrel. The reinforcing ribs and the motor barrel are arranged along the radial direction of the powertrain, which is conducive to the reinforcing ribs providing support to the motor barrel along the radial direction of the powertrain. The power supply cavity is stacked on the reducer cavity, the motor barrel and the reinforcing ribs in a direction perpendicular to the axial direction of the powertrain, which is conducive to the reinforcing ribs providing support to the power supply cavity, the reducer cavity and the motor barrel at the same time, so that any one of the reinforcing ribs, the power supply cavity, the reducer cavity and the motor barrel is connected to the other three shell parts, thereby improving the structural strength of the integrated shell.

[0008] In one embodiment, the length of the reinforcing rib along the axial direction of the power assembly is less than the length of the motor barrel. Along the stacking direction of the power supply cavity and the reinforcing rib, the inner diameter of the motor barrel is greater than the length of the reinforcing rib.

[0009] In the embodiment of the present application, the length of the axial reinforcement rib along the powertrain is less than the length of the motor barrel, which is beneficial to saving material of the reinforcement rib and reducing production costs. It is also beneficial for the reinforcement rib to not occupy too much space of the powertrain along the axial direction of the powertrain, which is beneficial to the small integration of the powertrain, and also facilitates the processing and casting of the integrated shell and installation in electric vehicles.

[0010] In one embodiment, along the stacking direction of the power supply cavity and the reinforcing rib, the inner diameter of the motor barrel is greater than the length of the reinforcing rib. This is beneficial for the reinforcing rib to not occupy too much space of the power assembly along the stacking direction of the power supply cavity and the reinforcing rib, so that the power supply cavity and the motor barrel have a partial overlap, which is beneficial to the miniaturized integrated layout of the power assembly. It is also beneficial for the reinforcing rib to achieve a fixed connection with the motor barrel with less material, to achieve a reinforced support for the motor barrel, which is beneficial to improve the stiffness of the motor barrel, and then improve the stiffness of the integrated shell, and improve the NVH performance of the whole vehicle.

[0011] In one embodiment, the reinforcing rib includes a plurality of reinforcing bosses, and along the thickness direction of the reinforcing rib, the thickness of each reinforcing boss is greater than the thickness of other portions of the reinforcing rib except the plurality of reinforcing bosses.

[0012] In the embodiment of the present application, the reinforcing boss is used to increase the rigidity of the reinforcing rib, and is also conducive to a smoother demoulding process during the integral molding of the integrated shell. Along the thickness direction of the reinforcing rib, the thickness of each reinforcing boss is greater than the thickness of the other parts of the reinforcing rib except the multiple reinforcing bosses, which is conducive to the reinforcing boss providing support for the reinforcing rib, increasing the rigidity of the reinforcing rib, and improving the supporting effect of the reinforcing rib on the power supply cavity, reducer cavity and motor barrel, which is conducive to improving the rigidity of the integrated shell and improving the NVH performance of the whole vehicle. The thickness of the other parts of the reinforcing rib except the multiple reinforcing bosses is relatively small, which is conducive to reducing materials, reducing the weight of the integrated shell, and facilitating the lightweighting of the powertrain.

[0013] In one embodiment, the reinforcing rib includes a first section, a middle section, and a second section connected in sequence, the first section and the second section are used to connect the outer wall of the power supply cavity and the outer wall of the motor barrel respectively, and the first section, the middle section, and the second section are used to connect the outer wall of the reducer cavity along the axial direction of the powertrain toward one end of the reducer cavity. The arrangement direction of the first section and the second section intersects the axial direction of the powertrain and the radial direction of the powertrain.

[0014] In the embodiment of the present application, the first section of the reinforcing rib is connected to the outer wall of the power supply cavity, which is beneficial for the reinforcing rib to provide supporting force for the shell part of the power supply cavity, and is beneficial for improving the rigidity of the shell part of the power supply cavity. The second section of the reinforcing rib is connected to the outer wall of the motor barrel, which is beneficial for the reinforcing rib to provide supporting force for the shell part of the motor barrel, and is beneficial for improving the rigidity of the motor barrel, improving the rigidity of the integrated shell, and improving the overall mode of the integrated shell.

[0015] In the embodiment of the present application, the first section, the middle section and the second section along the axial direction of the powertrain toward one end of the reducer cavity are used to connect to the outer wall of the reducer cavity, which is beneficial for the first section, the middle section and the second section to provide support and strengthening force to the shell part of the reducer cavity along the axial direction of the powertrain, so that the first section, the middle section and the second section can play a role at the same time, supporting the power supply cavity, the motor cylinder and the reducer cavity at the same time, which is beneficial to reduce the number of reinforcing ribs used, and is also beneficial to improve the stiffness of the integrated shell and improve the NVH performance of the vehicle.

[0016] In one embodiment, the middle section is arc-shaped, and the position where the middle section is connected to at least one of the first section and the second section is transitioned through an arc-shaped structure.

[0017] In the embodiment of the present application, the middle section is in an arc shape, which is conducive to the transition between the middle section and the first section and the second section, and is conducive to the formation of a smooth surface for transition connection of the reinforcing ribs, which is conducive to the conduction of force on the reinforcing ribs, which is conducive to reducing the problem of stress concentration, and is also conducive to reducing the formation of sharp corners in the mold during the die-casting process, which is convenient for production and manufacturing, and is conducive to improving the casting quality of the reinforcing ribs. The position where the middle section is connected to at least one of the first section and the second section is transitioned through an arc structure, which is conducive to a smoother connection between the middle section and the first section and the second section, reduces the formation of sharp corners of the mold, facilitates the conduction of force on the integrated shell, is conducive to improving the overall mode of the integrated shell, and is convenient for the production and manufacturing of the integrated shell.

[0018] In one embodiment, the middle section is in an arc shape, and a position where the middle section is connected to at least one of the first section and the second section is tangent to at least one.

[0019] In the embodiment of the present application, the middle section is arc-shaped, and the positions where the middle section is connected to the first section and the second section are tangent, which is conducive to a more regular shape of the reinforcing rib, and is also convenient for the processing of the die-casting mold. It is beneficial to the transmission of force on the first section, the middle section, and the second section of the reinforcing rib, which is conducive to reducing stress concentration problems, providing better support for the integrated shell, and improving the rigidity of the integrated shell, thereby improving the NVH performance of the entire vehicle.

[0020] In one embodiment, along the arrangement direction of the first segment and the second segment, the length of the middle segment is greater than the length of either the first segment or the second segment.

[0021] In the embodiment of the present application, along the arrangement direction of the first section and the second section, the length of the middle section is greater than the length of either the first section or the second section, which is beneficial for the first section to achieve a reinforced support for the power supply cavity with less material, and is beneficial for the second section to achieve a reinforced support for the motor barrel with less material, which is beneficial for reducing the use of die-casting materials and saving production costs.

[0022] In one embodiment, the first section is used to connect to the bottom plate of the power supply cavity, and the angle between the first section and the bottom plate of the power supply cavity is greater than or equal to 60° and less than or equal to 90°.

[0023] In the embodiment of the present application, the first section is connected to the bottom plate of the power supply cavity, which is beneficial for the first section of the reinforcing rib to provide support for the power supply cavity and increase the rigidity of the power supply cavity. The angle between the first section and the bottom plate of the power supply cavity is greater than or equal to 60° and less than or equal to 90°. A larger angle is beneficial to reduce the accumulation of materials at the angle, which is beneficial to the processing and casting of the integrated shell and mold. If the angle between the first section and the bottom plate of the power supply cavity is small, it is not conducive to the demolding and mold processing of the die-casting process, and it is easy to cause material accumulation at the angle, which is easy to cause mold sticking, and has an adverse effect on the manufacturing quality of the product.

[0024] In one embodiment, the angle between the second segment and the tangent line of the outer wall of the motor barrel is greater than or equal to 60° and less than or equal to 90°.

[0025] In the embodiment of the present application, the second section is connected to the outer wall of the motor barrel, which is conducive to the second section providing support for the motor barrel and increasing the rigidity of the motor barrel. The angle between the second section and the tangent of the outer wall of the motor barrel is greater than or equal to 60° and less than or equal to 90°. A larger angle is conducive to reducing the accumulation of materials at the angle, which is conducive to the processing and casting of the integrated housing and mold. If the angle between the second section and the tangent of the outer wall of the motor barrel is small, it is not conducive to the demolding and mold processing of the die-casting process, and it is easy to cause material accumulation at the angle, which is easy to cause mold sticking, and has an adverse effect on the manufacturing quality of the product.

[0026] In one embodiment, the integrated housing includes a fixed boss, the fixed boss is used to fix the motor end cover, and the second section is used to connect the fixed boss. The fixed boss protrudes from the outer wall of the motor barrel away from the inner cavity of the motor barrel along the radial direction of the motor barrel, and the second section is spaced from the outer wall of the motor barrel.

[0027] In the embodiment of the present application, the fixed boss is used to be fixedly connected to the motor end cover through the bolt hole. The fixed boss is also conducive to strengthening the rigidity of the outer wall of the motor barrel, preventing the motor barrel from deforming, and improving the casting quality. The second section is used to connect the fixed boss, which is conducive to the reinforcement ribs further strengthening the fixing rigidity of the fixed boss. At the same time, the second section is connected to the fixed boss, which is conducive to improving the connection strength between the motor barrel and the reinforcement ribs during the casting process, and is also conducive to reducing the impact of the reinforcement ribs on the motor barrel during the demolding process. Even if shrinkage holes and other problems may occur during the demolding process, the connection with the fixed boss with thicker wall thickness on the motor barrel can reduce the risk of leakage of the motor barrel caused by the shrinkage hole connection line.

[0028] In the embodiment of the present application, the radial fixing boss of the motor barrel protrudes from the outer wall of the motor barrel away from the inner cavity of the motor barrel. The motor barrel is used to fix the motor stator, which is conducive to avoiding the influence of the fixing boss on the fixing of the motor stator. At the same time, it is also conducive to the smooth demoulding process of the motor barrel during the die-casting process. The second section is spaced from the outer wall of the motor barrel, which is conducive to reducing the problem of the motor barrel losing roundness caused by the stress concentration on the outer wall of the motor barrel caused by the direct contact between the second section and the outer wall of the motor barrel, and is conducive to improving the casting quality of the motor barrel.

[0029] In one embodiment, along the axial direction of the powertrain, the length of at least one of the second section and the first section is greater than the length of the middle section, and a portion of at least one of the second section and the first section protrudes from the middle section away from the reducer cavity.

[0030] In an embodiment of the present application, along the axial direction of the powertrain, the length of at least one of the second section and the first section is greater than the length of the middle section, the first section is connected to the power supply cavity, and the length of the first section along the axial direction of the powertrain is longer, that is, the contact area between the first section and the power supply cavity is larger, which is beneficial to improve the reinforcing effect of the reinforcing ribs on the power supply cavity. The second section is connected to the outer wall of the motor barrel, and the length of the second section along the axial direction of the powertrain is longer, that is, the contact area between the second section and the outer wall of the motor barrel is larger, which is beneficial to improve the reinforcing effect of the reinforcing ribs on the motor barrel. The middle section is fixedly connected to the reducer cavity along the surface of the reducer cavity perpendicular to the axial direction of the powertrain. The smaller middle section along the axial direction of the powertrain has less influence on the reinforcing effect of the reducer cavity, and is also beneficial to saving die-casting materials.

[0031] In an embodiment of the present application, a portion of at least one of the second section and the first section protrudes from the middle section away from the reducer cavity, which is beneficial to strengthening the supporting effect of at least one of the first section and the second section on the power supply cavity or the motor cylinder. At the same time, the length of the middle section is relatively small, which is beneficial to saving die-casting materials and reducing production costs.

[0032] In one embodiment, the integrated housing further comprises an output shaft hole, and the output shaft hole is used to accommodate the half shaft of the differential. In the radial direction of the output shaft hole, the output shaft hole, the reinforcing rib and the motor barrel are arranged in sequence. In the stacking direction of the power supply cavity and the reinforcing rib, the output shaft hole, the reinforcing rib and the power supply cavity are arranged in sequence.

[0033] In the embodiment of the present application, the half shaft of the differential is used for driving connection with the wheel, and the kinetic energy generated by the powertrain can be transmitted to the half shaft of the differential and the wheel in turn for the electric vehicle to drive. Along the radial direction of the output shaft hole, the output shaft hole, the reinforcing ribs and the motor barrel are arranged in sequence, which is conducive to the reinforcing ribs not occupying too much space of the powertrain along the radial direction of the output shaft hole, which is conducive to the compact arrangement of the integrated housing and the miniaturized layout of the powertrain. Along the stacking direction of the power supply cavity and the reinforcing ribs, the output shaft hole, the reinforcing ribs and the power supply cavity are arranged in sequence, which is conducive to reducing the use of reinforcing rib materials, and at the same time, it is also conducive to reducing the space occupied by the reinforcing ribs in the stacking direction of the power supply cavity and the reinforcing ribs, which is conducive to the miniaturized layout of the powertrain.

[0034] In one embodiment, the integrated housing includes an output shaft hole, and the output shaft hole is used to accommodate the half shaft of the differential. In the radial direction of the output shaft hole, the reinforcing ribs, the output shaft hole and the motor barrel are arranged in sequence. In the stacking direction of the power supply cavity and the reinforcing ribs, the reinforcing ribs, the output shaft hole and the power supply cavity are arranged in sequence.

[0035] In the embodiment of the present application, the reinforcing ribs, the output shaft holes and the motor barrel are arranged in sequence along the radial direction of the output shaft hole, which is beneficial to provide more demolding directions for the reinforcing ribs, so that the reinforcing ribs can be demolded not only from the axial direction of the powertrain, but also from the radial direction of the output shaft hole, which is beneficial to smoother demolding process of the integrated shell after die-casting. The reinforcing ribs bypass the output shaft hole from the direction of the output shaft hole away from the power supply cavity, thereby increasing the overall length of the reinforcing ribs, which is beneficial to increasing the contact area between the reinforcing ribs and the reducer cavity, which is beneficial to further improve the supporting effect of the reinforcing ribs on the reducer cavity, which is beneficial to improve the stiffness of the outer wall of the reducer cavity, which is beneficial to improve the stiffness of the integrated shell, and improve the NVH performance of the whole vehicle.

[0036] In the embodiment of the present application, the reinforcing ribs, the output shaft holes and the power supply cavity are arranged in sequence along the stacking direction of the power supply cavity and the reinforcing ribs. This is beneficial to provide more demoulding directions for the reinforcing ribs, so that the reinforcing ribs can be demoulded not only along the axial direction of the powertrain, but also in the direction perpendicular to the axial direction of the powertrain, and it is also convenient for mold processing.

[0037] In one embodiment, the integrated housing further comprises an output shaft hole, which is used to accommodate the half shaft of the differential. In the axial direction of the powertrain, the output shaft hole, the end of the reinforcing rib away from the reducer cavity and the end of the motor barrel away from the reducer cavity are sequentially arranged at intervals.

[0038] In the embodiment of the present application, along the axial direction of the powertrain, the output shaft hole, the end of the reinforcing rib facing away from the reducer cavity and the end of the motor barrel facing away from the reducer cavity are arranged in sequence at intervals, which is beneficial for the reinforcing rib to not occupy too much space of the powertrain along the axial direction of the powertrain, is beneficial for the miniaturized layout of the powertrain, and is also beneficial for the integrated housing to be demolded in a direction perpendicular to the axial direction of the powertrain after die-casting, which is beneficial for the smooth demolding process, and is beneficial to improving the die-casting quality and the quality of the integrated housing.

[0039] In a second aspect, an embodiment of the present application provides an electric vehicle, comprising a frame, wheels and a powertrain as described in any one of the first aspects above, wherein the frame is used to fix the powertrain, and the powertrain drives the wheels to travel.

[0040] In the embodiment of the present application, the reinforcing ribs in the power assembly of the present application are integrally formed with the integrated shell, and the reinforcing ribs provide support and reinforcement for the three cavities of the power supply cavity, the reducer cavity and the motor barrel at the same time, which is beneficial to reduce the number of reinforcing ribs used in the integrated shell, and is beneficial to improve the rigidity of the integrated shell, improve the NVH performance of the integrated shell, and thereby enhance the overall vehicle performance of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0042] Figure 1 is a structural schematic diagram of an electric vehicle provided by an embodiment of the present application;

[0043] Figure 2 is a structural schematic diagram of an integrated housing provided in an embodiment of the present application;

[0044] Figure 3 is a structural schematic diagram of an integrated housing provided in an embodiment of the present application;

[0045] Figure 4 yes Figure 2 A partial enlarged view of the middle M1 part;

[0046] Figure 5 is a structural schematic diagram of an integrated housing provided in an embodiment of the present application;

[0047] Figure 6 yes Figure 5 A cross-sectional view taken along AA in the middle;

[0048] Figure 7 is a structural schematic diagram of an integrated housing provided in an embodiment of the present application;

[0049] Figure 8 is a structural schematic diagram of an integrated housing provided in an embodiment of the present application;

[0050] Fig. 9 It is a structural schematic diagram of an integrated housing provided in one embodiment of the present application. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0052] In this document, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0053] In addition, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the change of the orientation of the structure.

[0054] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of the present application are explained and described below.

[0055] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for situations where the absolute parallelism is not caused by factors such as assembly tolerance, design tolerance, and the influence of structural flatness.

[0056] Vertical: The verticality defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. It also allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0057] NVH: It is the abbreviation of Noise, Vibration and Harshness, which refers to noise, vibration and acoustic roughness.

[0058] In order to improve the rigidity of the powertrain housing and improve the NVH performance of the powertrain, the present application provides a powertrain with three cavities connected by reinforcing ribs, the powertrain includes an integrated housing, the integrated housing includes an integrated power supply cavity, a reducer cavity, a motor barrel and reinforcing ribs, the power supply cavity is used to accommodate at least one electrical component of the motor controller, the on-board charger and the on-board power distribution device, the reducer cavity and the motor barrel are used to accommodate the parallel shaft gear set and the stator of the motor respectively. Among them, the reinforcing ribs are used to connect the outer walls of the power supply cavity, the reducer cavity and the motor barrel, the reinforcing ribs and the motor barrel are arranged on the same side of the reducer cavity along the axial direction of the powertrain, the reinforcing ribs and the motor barrel are arranged along the radial direction of the powertrain, and the power supply cavity is stacked on the reducer cavity, the motor barrel and the reinforcing ribs in a direction perpendicular to the axial direction of the powertrain. The reinforcing ribs are integrally formed with the integrated housing, and the reinforcing ribs provide support and reinforcement for the three cavities of the power supply cavity, the reducer cavity and the motor barrel at the same time, which is conducive to reducing the number of reinforcing ribs used in the integrated housing, and is conducive to improving the rigidity of the integrated housing and improving the NVH performance of the integrated housing.

[0059] The reinforcing ribs provided in the embodiment of the present application connect the power assembly of three cavities, and the power assembly is applied to electric vehicles to improve the overall performance of the electric vehicles.

[0060] See also Figure 1 , Figure 1 A schematic diagram of the structure of an electric vehicle 1 provided in an embodiment of the present application. In the embodiment of the present application, the electric vehicle 1 includes a powertrain 10, a frame 20, a battery pack 30 and wheels 40. The powertrain 10 and the battery pack 30 are fixed to the frame 20. The powertrain 10 is used to receive power from the battery pack 30 and to drive the wheels 40.

[0061] In the embodiment of the present application, the battery pack 30 may also be referred to as a power battery.

[0062] In the embodiment of the present application, the electric vehicle 1 refers to a wheeled device driven or towed by a power device.

[0063] The powertrain 10 provided in an embodiment of the present application will be described in detail below.

[0064] See also Figure 1and Figure 2 , Figure 2 A schematic diagram of the structure of an integrated housing 100 provided for an embodiment of the present application. In one embodiment, the power assembly 10 includes an integrated housing 100 and at least one of a reducer (not shown), a motor (not shown) and a power supply device (not shown). The power supply device is used to provide AC power to the motor, and the stator (not shown) in the motor is used to receive the AC power output by the power supply device, drive the rotor (not shown) and the motor shaft (not shown) in the motor to rotate, and the rotation of the motor shaft drives the input shaft (not shown) of the reducer to rotate, and the input shaft of the reducer transmits power to the internal gear of the reducer (not shown), and the output shaft (not shown) of the reducer is used to transmit the power of the motor to the wheel 40.

[0065] In the embodiment of the present application, the integrated housing 100 may also be referred to as an assembly housing, a shell, an electric drive housing, etc.

[0066] In the embodiment of the present application, the integrated housing 100 is integrally die-casted, and the integrated housing 100 may also be referred to as a die-cast housing 100. The integrated housing 100 includes a reducer cavity 110 and a motor barrel 120, the motor barrel 120 is used to accommodate the stator and rotor of the motor, and the reducer cavity 110 is used to accommodate the parallel shaft gear set of the reducer, wherein the parallel shaft gear set includes multiple gears and multiple shafts, the multiple shafts are connected by gear transmission, and the multiple shafts are parallel.

[0067] Among them, the English abbreviation of the motor controller is MCU, which stands for Motor Control Unit. The motor controller is used to receive the DC power of the battery pack 30 and convert the DC power into AC power to transmit to the stator winding of the motor. The English abbreviation of the on-board charger is OBC, which stands for On-Board Charger. The on-board charger is used to convert the AC power of the power grid into DC power or directly transmit the DC power to charge the battery pack 30 or supply power to the load of the whole vehicle. The on-board power distribution device is also called the high-voltage distribution box, abbreviated as PDU in English, which stands for Power Distribution Unit. It is responsible for the power distribution and management in the high-voltage system of the electric vehicle 1, and provides the whole vehicle with functions such as charging and discharging control, power-on control of high-voltage components, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control, and protects and monitors the operation of the high-voltage system.

[0068] See also Figure 2In one embodiment, a powertrain 10 with three cavities connected by a reinforcing rib 140 includes an integrated housing 100, and the integrated housing 100 includes an integrated power supply cavity 130, a reducer cavity 110, a motor barrel 120 and a reinforcing rib 140. The power supply cavity 130 is used to accommodate at least one electrical component of a motor controller, a vehicle charger and a vehicle power distribution device, and the reducer cavity 110 and the motor barrel 120 are used to accommodate a parallel shaft gear set (not shown) and a stator of a motor, respectively. The reinforcing rib 140 is used to connect the outer wall of each of the power supply cavity 130, the reducer cavity 110 and the motor barrel 120, and the reinforcing rib 140 and the motor barrel 120 are arranged on the same side of the reducer cavity 110 along the axial direction O of the powertrain, and the reinforcing rib 140 and the motor barrel 120 are arranged along the radial direction R of the powertrain, and the power supply cavity 130 is stacked on the reducer cavity 110, the motor barrel 120 and the reinforcing rib 140 in a direction perpendicular to the axial direction O of the powertrain.

[0069] In the embodiment of the present application, the integrated housing 100 is integrally formed and has a solid structure. The power supply cavity 130 is used to accommodate at least one electrical component of the motor controller, the vehicle charger, and the vehicle power distribution device, wherein the electrical components include a capacitor module, a power module, a circuit board, a copper bar assembly, an inductor, a capacitor, etc. The reducer cavity 110 is used to accommodate the parallel shaft gear set of the reducer, and the motor barrel 120 accommodates the stator of the motor. The reducer cavity 110 and the motor barrel 120 are arranged along the axial direction O of the powertrain. Along the axial direction O of the powertrain, the projections of the reducer cavity 110 and the motor barrel 120 partially overlap, which is conducive to reducing the space occupied by the integrated housing 100 in the powertrain 10 along the direction perpendicular to the axial direction O of the powertrain, and is conducive to the miniaturization of the integrated housing 100.

[0070] In the embodiment of the present application, the reinforcing rib 140 is used to connect the outer wall of each of the power supply cavity 130, the reducer cavity 110 and the motor cylinder 120. The reinforcing rib 140 is integrally formed with the power supply cavity 130, the reducer cavity 110 and the motor cylinder 120. The reinforcing rib 140 simultaneously provides support and reinforcement for the outer walls of the three cavities of the power supply cavity 130, the reducer cavity 110 and the motor cylinder 120, which is beneficial to reduce the number of reinforcing ribs 140 used in the integrated shell 100, and is beneficial to improve the rigidity of the integrated shell 100 and improve the NVH performance of the integrated shell 100.

[0071] In the embodiments of the present application, the reinforcing rib 140 and the motor cylinder 120 are arranged on the same side of the reducer cavity 110 along the axial direction O of the powertrain, which is beneficial to the support and strengthening of the reducer cavity 110 and the motor cylinder 120 by the reinforcing rib 140. The reinforcing rib 140 and the motor cylinder 120 are arranged along the radial direction R of the powertrain, which is beneficial to the reinforcing rib 140 providing a supporting force to the motor cylinder 120 along the radial direction R of the powertrain. The power supply cavity 130 is stacked on the reducer cavity 110, the motor cylinder 120 and the reinforcing rib 140 along the direction perpendicular to the axial direction O of the powertrain, which is beneficial to the reinforcing rib 140 providing a supporting effect on the power supply cavity 130, the reducer cavity 110 and the motor cylinder 120 at the same time, so that any one of the reinforcing rib 140, the power supply cavity 130, the reducer cavity 110 and the motor cylinder 120 is connected to the housing parts of the other three, improving the structural strength of the integrated housing 100.

[0072] It should be noted that the projection along the axial direction O of the powertrain refers to the projection along the axial direction O of the powertrain on the projection plane perpendicular to the axial direction O of the powertrain, and this projection plane is perpendicular to the axial direction O of the powertrain.

[0073] Please refer to Figure 2 and Figure 3 , Figure 3 which is a schematic structural diagram of the integrated housing 100 provided by an embodiment of the present application. In one embodiment, the length of the reinforcing rib 140 along the axial direction O of the powertrain is less than the length of the motor cylinder 120. Along the stacking direction X of the power supply cavity 130 and the reinforcing rib 140, the inner diameter of the motor cylinder 120 is greater than the length of the reinforcing rib 140.

[0074] As Figure 2 shown, in the embodiments of the present application, the length of the reinforcing rib 140 along the axial direction O of the powertrain is denoted as L1, and the length of the motor cylinder 120 along the axial direction O of the powertrain is denoted as L2, L1 < L2, which is beneficial to saving the material of the reinforcing rib 140, reducing the production cost, and also beneficial to the reinforcing rib 140 not occupying too much space of the powertrain 10 along the axial direction O of the powertrain, being beneficial to the miniaturization and integration of the powertrain 10, and also facilitating the processing and casting of the integrated housing 100 and the installation on the electric vehicle 1.

[0075] In one embodiment, without affecting the installation, one end of the reinforcing rib 140背离 the reducer cavity 110 along the axial direction O of the powertrain can be flush with one end of the motor cylinder 120背离 the reducer cavity 110, making the structural strength of the reinforcing rib 140 and the motor cylinder 120 more reliable.

[0076] As Figure 3As shown, in the embodiment of the present application, the inner diameter of the motor barrel 120 along the stacking direction X of the power supply cavity 130 and the reinforcing rib 140 is recorded as L3, and the length of the reinforcing rib 140 along the stacking direction X of the power supply cavity 130 and the reinforcing rib 140 is recorded as L4, L3>L4, which is conducive to the reinforcing rib 140 not occupying too much space of the power assembly 10 along the stacking direction X of the power supply cavity 130 and the reinforcing rib 140, so that the power supply cavity 130 and the motor barrel 120 have a partial overlap, which is conducive to the miniaturized integrated layout of the power assembly 10. It is also conducive to the reinforcing rib 140 to achieve a fixed connection with the motor barrel 120 with less material, to achieve a reinforced support function for the motor barrel 120, and to improve the rigidity of the motor barrel 120, thereby improving the rigidity of the integrated housing 100 and improving the NVH performance of the whole vehicle.

[0077] See also Figure 2 and Figure 4 , Figure 4 for Figure 2 A local enlarged view of the M1 portion. In one embodiment, the reinforcing rib 140 includes a plurality of reinforcing bosses 141 . Along the thickness direction of the reinforcing rib 140 , the thickness of each reinforcing boss 141 is greater than the thickness of other portions of the reinforcing rib 140 except the plurality of reinforcing bosses 141 .

[0078] In the embodiment of the present application, the reinforcing boss 141 is used to increase the rigidity of the reinforcing rib 140, and is also conducive to a smoother demoulding process of the reinforcing rib 140 during the one-piece molding of the integrated housing 100. Along the thickness direction of the reinforcing rib 140, the thickness of the reinforcing boss 141 is recorded as L5, and the thickness of the other parts of the reinforcing rib 140 except the multiple reinforcing bosses 141 is recorded as L6, L5>L6, which is conducive to the reinforcing boss 141 to provide support for the reinforcing rib 140, increase the rigidity of the reinforcing rib 140, and improve the supporting effect of the reinforcing rib 140 on the power supply cavity 130, the reducer cavity 110 and the motor cylinder 120, which is conducive to improving the rigidity of the integrated housing 100 and improving the NVH performance of the vehicle. The thickness of the other parts of the reinforcing rib 140 except the multiple reinforcing bosses 141 is relatively small, which is conducive to reducing materials, reducing the weight of the integrated housing 100, and is conducive to lightweighting the powertrain 10.

[0079] In one embodiment, the reinforcing rib 140 can be formed with a uniform thickness without affecting demolding, so that the structural strength of the reinforcing rib 140 is uniform.

[0080] Please refer to Figure 2 , Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of an integrated housing 100 provided in one embodiment of the present application. Figure 6 for Figure 5In one embodiment, the reinforcing rib 140 includes a first section 142, a middle section 143 and a second section 144 (such as Figure 6 As shown in FIG. 1 ), the first section 142 and the second section 144 are respectively used to connect the outer wall 132 of the power supply cavity 130 and the outer wall 121 of the motor cylinder 120. Along the axial direction O of the power assembly, the first section 142, the middle section 143 and the second section 144 are used to connect the outer wall 111 of the reducer cavity 110 (as shown in FIG. 1 ). Figure 2 As shown in FIG. 1 , the arrangement direction Y of the first section 142 and the second section 144 intersects the axial direction O of the powertrain and the radial direction R of the powertrain.

[0081] In the embodiment of the present application, the first section 142 of the reinforcing rib 140 is connected to the outer wall 132 of the power supply cavity 130, which is beneficial for the reinforcing rib 140 to provide supporting force for the shell portion of the power supply cavity 130, and is beneficial for improving the rigidity of the shell portion of the power supply cavity 130. The second section 144 of the reinforcing rib 140 is connected to the outer wall 121 of the motor barrel 120, which is beneficial for the reinforcing rib 140 to provide supporting force for the shell portion of the motor barrel 120, and is beneficial for improving the rigidity of the motor barrel 120, and is beneficial for improving the rigidity of the integrated shell 100, and is beneficial for improving the overall mode of the integrated shell 100.

[0082] like Figure 2 As shown, in the embodiment of the present application, the first section 142, the middle section 143 and the second section 144 along the axial direction O of the powertrain toward one end of the reducer cavity 110 are used to connect to the outer wall 111 of the reducer cavity 110, which is beneficial for the first section 142, the middle section 143 and the second section 144 to provide support and strengthening force to the reducer cavity 110 along the axial direction O of the powertrain, so that the first section 142, the middle section 143 and the second section 144 can play a role at the same time, and support the power supply cavity 130, the motor cylinder 120 and the reducer cavity 110 at the same time, which is beneficial to reduce the number of reinforcing ribs 140 used, and is also beneficial to improve the rigidity of the integrated shell 100 and improve the NVH performance of the vehicle.

[0083] Please refer to Figure 5 and Figure 6 In one embodiment, the middle section 143 is arc-shaped, and the position where the middle section 143 is connected to at least one of the first section 142 and the second section 144 is transitioned through an arc structure.

[0084] In the embodiment of the present application, the middle section 143 is in an arc shape, which is conducive to the transition between the middle section 143 and the first section 142 and the second section 144, and is conducive to the formation of a smooth surface for transition connection of the reinforcing rib 140, which is conducive to the conduction of force on the reinforcing rib 140, which is conducive to reducing the problem of stress concentration, and is also conducive to reducing the formation of sharp corners in the mold during the die-casting process, which is convenient for production and manufacturing, and is conducive to improving the casting quality of the reinforcing rib 140. The position where the middle section 143 is connected to at least one of the first section 142 and the second section 144 is transitioned through an arc structure, which is conducive to a smoother connection between the middle section 143 and the first section 142 and the second section 144, reducing the formation of sharp corners of the mold, facilitating the conduction of force on the integrated housing 100, and is conducive to improving the overall modality of the integrated housing 100, and is convenient for the production and manufacturing of the integrated housing 100.

[0085] In one embodiment, the middle section 143 is in a circular arc shape or an elliptical arc shape. In one embodiment, the middle section 143 is in a "C" shape.

[0086] See also Figure 7 , Figure 7 The schematic diagram of the structure of the integrated housing 100 provided in one embodiment of the present application is shown in FIG. 1. In one embodiment, the middle section 143 is in an arc shape, and the position where the middle section 143 is connected to at least one of the first section 142 and the second section 144 is tangent to at least one.

[0087] In the embodiment of the present application, the middle section 143 is in an arc shape, and the positions where the middle section 143 is connected to the first section 142 and the second section 144 are tangent, which is conducive to making the shape of the reinforcing rib 140 more regular, and is also convenient for the processing of the die-casting mold, which is conducive to the transmission of force on the first section 142, the middle section 143, and the second section 144 of the reinforcing rib 140, which is conducive to reducing stress concentration problems, and is conducive to better providing support for the integrated shell 100, which is conducive to improving the rigidity of the integrated shell 100 and improving the NVH performance of the entire vehicle.

[0088] See also Figure 6 In one embodiment, along the arrangement direction Y of the first segment 142 and the second segment 144 , the length of the middle segment 143 is greater than the length of either the first segment 142 or the second segment 144 .

[0089] In the embodiment of the present application, along the arrangement direction Y of the first section 142 and the second section 144, the length of the middle section 143 is recorded as L7, the length of the first section 142 is recorded as L8, and the length of the second section 144 is recorded as L9, L7>L8, L7>L9, which is beneficial for the first section 142 to achieve a reinforced support for the power supply cavity 130 with less material, and is beneficial for the second section 144 to achieve a reinforced support for the motor cylinder 120 with less material, which is beneficial to reduce the use of die-casting materials and save production costs.

[0090] Please continue reading Figure 6 In one embodiment, the first section 142 is used to connect the bottom plate 131 of the power supply cavity 130, and the angle between the first section 142 and the bottom plate 131 of the power supply cavity 130 is greater than or equal to 60° and less than or equal to 90°.

[0091] In the embodiment of the present application, the first section 142 is connected to the bottom plate 131 of the power supply cavity 130, which is conducive to the first section 142 of the reinforcing rib 140 providing support to the power supply cavity 130 and increasing the rigidity of the power supply cavity 130. The angle between the first section 142 and the bottom plate 131 of the power supply cavity 130 is denoted as α, and the value of α is greater than or equal to 60° and less than or equal to 90°. A larger angle is conducive to reducing the accumulation of materials at the angle α, which is conducive to the processing and casting of the integrated housing 100 and the mold. If the angle α between the first section 142 and the bottom plate 131 of the power supply cavity 130 is small, it is not conducive to the demolding and mold processing of the die-casting process, and it is easy to cause material accumulation at the angle α, which is easy to cause mold sticking, and has an adverse effect on the manufacturing quality of the product.

[0092] See also Figure 7 In one embodiment, the angle between the first section 142 and the bottom plate 131 of the power supply cavity 130 is α, α=90°, which is beneficial for the reinforcing rib 140 to better provide support for the power supply cavity 130, and is also beneficial for avoiding the accumulation of die-casting materials at the angle α, which is convenient for mold processing and the die-casting demolding process of the integrated shell 100.

[0093] Please continue reading Figure 6 In one embodiment, the angle between the second section 144 and the tangent of the outer wall 121 of the motor barrel 120 is greater than or equal to 60° and less than or equal to 90°.

[0094] In the embodiment of the present application, the second section 144 is connected to the outer wall 121 of the motor barrel 120, which is conducive to the second section 144 providing support to the motor barrel 120 and increasing the rigidity of the motor barrel 120. The angle between the second section 144 and the tangent of the outer wall 121 of the motor barrel 120 is denoted as β, and the value of β is greater than or equal to 60° and less than or equal to 90°. A larger angle is conducive to reducing the accumulation of materials at the angle β, which is conducive to the processing and casting of the integrated housing 100 and the mold. If β is small, it is not conducive to the demoulding and mold processing of the die-casting process, and it is easy to cause material accumulation at the angle β, which is easy to cause mold sticking, and has an adverse effect on the manufacturing quality of the product.

[0095] In one embodiment, the angle between the second section 144 and the tangent of the outer wall 121 of the motor barrel 120 is denoted as β, β=90°, which is beneficial for the reinforcing rib 140 to better provide support for the outer wall 121 of the motor barrel 120, and is also beneficial for avoiding the accumulation of die-casting materials at the angle β, which is convenient for the processing of the mold and the die-casting demolding process of the integrated shell 100.

[0096] Please refer to Figure 2 and Figure 7 In one embodiment, the integrated housing 100 includes a fixing boss 150, the fixing boss 150 is used to fix the motor end cover (not shown), and the second section 144 is used to connect the fixing boss 150. In the radial direction R1 of the motor barrel, the fixing boss 150 protrudes from the outer wall 121 of the motor barrel 120 away from the inner cavity of the motor barrel 120, and the second section 144 is spaced from the outer wall 121 of the motor barrel 120.

[0097] In the embodiment of the present application, the fixed boss 150 is used to be fixedly connected with the motor end cover through the bolt hole. The fixed boss 150 is also conducive to strengthening the rigidity of the outer wall 121 of the motor barrel 120, which is conducive to preventing the motor barrel 120 from deforming and improving the casting quality. The second section 144 is used to connect the fixed boss 150, which is conducive to the reinforcing rib 140 to further strengthen the fixing rigidity of the fixed boss 150. At the same time, the second section 144 is connected to the fixed boss 150, which is conducive to improving the connection strength between the motor barrel 120 and the reinforcing rib 140 during the casting process, and is also conducive to reducing the influence of the reinforcing rib 140 on the motor barrel 120 during the demolding process. Even if shrinkage holes and other problems may occur during the demolding process, the connection with the fixed boss 150 with a thicker wall thickness on the motor barrel 120 can reduce the risk of leakage of the motor barrel 120 caused by the shrinkage hole connection line.

[0098] In the embodiment of the present application, the fixing boss 150 protrudes from the outer wall 121 of the motor barrel 120 away from the inner cavity of the motor barrel 120 along the radial direction R1 of the motor barrel. The motor barrel 120 is used to fix the motor stator, which is conducive to avoiding the influence of the fixing boss 150 on the fixing of the motor stator. At the same time, it is also conducive to the smooth demoulding process during the die-casting process of the motor barrel 120. The second section 144 is spaced from the outer wall 121 of the motor barrel 120, which is conducive to reducing the stress concentration on the outer wall 121 of the motor barrel 120 caused by direct contact between the second section 144 and the outer wall 121 of the motor barrel 120, resulting in the problem of the motor barrel 120 being out of round, which is conducive to improving the casting quality of the motor barrel 120.

[0099] See also Figure 2 and Figure 7 In one embodiment, the angle between the second section 144 and the tangent line of the outer wall of the fixing boss 150 is greater than or equal to 60° and less than or equal to 90°.

[0100] In the embodiment of the present application, the angle between the second section 144 and the tangent of the outer wall of the fixed boss 150 is denoted as γ, and γ is greater than or equal to 60° and less than or equal to 90°. A larger angle is beneficial to reduce the accumulation of material at the angle γ, which is beneficial to the processing and casting of the integrated housing 100 and the mold. If the angle γ between the second section 144 and the tangent of the outer wall of the fixed boss 150 is small, it is not conducive to the demoulding process of the die-casting process, the processing of the mold, and it is easy to cause the accumulation of material at the angle γ, which is easy to cause the mold sticking phenomenon, and has an adverse effect on the manufacturing quality of the product.

[0101] See also Figure 8 , Figure 8 A schematic diagram of the structure of an integrated housing 100 provided in one embodiment of the present application. In one embodiment, along the powertrain axial direction O, the length of at least one of the second section 144 and the first section 142 is greater than the length of the middle section 143, and a portion of at least one of the second section 144 and the first section 142 protrudes from the middle section 143 away from the reducer cavity 110.

[0102] In the embodiment of the present application, along the axial direction O of the powertrain, the length of at least one of the second section 144 and the first section 142 is greater than the length of the middle section 143, the first section 142 is connected to the power supply cavity 130, and the length of the first section 142 along the axial direction O of the powertrain is longer, that is, the contact area between the first section 142 and the power supply cavity 130 is larger, which is conducive to improving the reinforcing effect of the reinforcing rib 140 on the power supply cavity 130. The second section 144 is connected to the outer wall 121 of the motor barrel 120, and the length of the second section 144 along the axial direction O of the powertrain is longer, that is, the contact area between the second section 144 and the outer wall 121 of the motor barrel 120 is larger, which is conducive to improving the reinforcing effect of the reinforcing rib 140 on the motor barrel 120. The middle section 143 is fixedly connected to the reducer cavity 110 along the surface of the reducer cavity 110 perpendicular to the axial direction O of the powertrain, and the middle section 143 is smaller along the axial direction O of the powertrain, which has less influence on the reinforcing effect of the reducer cavity 110, and is also conducive to saving die-casting materials.

[0103] In the embodiment of the present application, a portion of at least one of the second section 144 and the first section 142 protrudes from the middle section 143 away from the reducer cavity 110, which is beneficial to strengthening the supporting effect of at least one of the first section 142 and the second section 144 on the power supply cavity 130 or the motor cylinder 120. At the same time, the length of the middle section 143 is relatively small, which is beneficial to saving die-casting materials and reducing production costs.

[0104] See also Figure 8In one embodiment, the second section 144 protrudes from the middle section 143 away from the reducer cavity 110, and the portion of the second section 144 protruding from the middle section 143 away from the reducer cavity 110 is recorded as a reinforcement portion 1441. The reinforcement portion 1441 is a right-angled triangle, and one right-angled side of the reinforcement portion 1441 is flush with the middle section 143, and the other right-angled side is connected to the fixed boss 150. The hypotenuse is located between the connection position of the second section 144 and the middle section 143 to the end of the fixed boss 150, which is beneficial to reduce material consumption while improving structural strength.

[0105] Please refer to Figure 2 and Figure 6 In one embodiment, the integrated housing 100 further includes an output shaft hole 160, which is used to accommodate a half shaft of a differential (not shown). In the output shaft hole radial direction R2, the output shaft hole 160, the reinforcing rib 140 and the motor barrel 120 are arranged in sequence. In the stacking direction X of the power supply cavity 130 and the reinforcing rib 140, the output shaft hole 160, the reinforcing rib 140 and the power supply cavity 130 are arranged in sequence.

[0106] In the embodiment of the present application, the half shaft of the differential is used for driving connection with the wheel 40, and the kinetic energy generated by the power assembly 10 can be sequentially transmitted to the half shaft of the differential and the wheel 40 for the electric vehicle 1 to travel. Along the output shaft hole radial direction R2, the output shaft hole 160, the reinforcing rib 140 and the motor barrel 120 are sequentially arranged at intervals, which is conducive to the reinforcing rib 140 not occupying too much space of the power assembly 10 along the output shaft hole radial direction R2, which is conducive to the compact arrangement of the integrated housing 100, and is conducive to the miniaturization of the power assembly 10. Along the stacking direction X of the power supply cavity 130 and the reinforcing rib 140, the output shaft hole 160, the reinforcing rib 140 and the power supply cavity 130 are sequentially arranged at intervals, which is conducive to reducing the use of the reinforcing rib 140 material, and at the same time, it is also conducive to reducing the space occupied by the reinforcing rib 140 in the power assembly 10 along the stacking direction X of the power supply cavity 130 and the reinforcing rib 140, which is conducive to the miniaturization of the power assembly 10.

[0107] See also Figure 2 and Fig. 9 , Fig. 9 A schematic diagram of the structure of an integrated housing 100 provided in one embodiment of the present application. In one embodiment, the integrated housing 100 includes an output shaft hole 160, and the output shaft hole 160 is used to accommodate the half shaft of the differential. Among them, along the radial direction R2 of the output shaft hole, the reinforcing ribs 140, the output shaft hole 160 and the motor barrel 120 are arranged in sequence. Along the stacking direction X of the power supply cavity 130 and the reinforcing ribs 140, the reinforcing ribs 140, the output shaft hole 160 and the power supply cavity 130 are arranged in sequence.

[0108] In the embodiment of the present application, along the output shaft hole radial direction R2, the reinforcing rib 140, the output shaft hole 160 and the motor barrel 120 are arranged in sequence at intervals, which is beneficial to provide more demolding directions for the reinforcing rib 140, so that the reinforcing rib 140 can be demolded not only from the direction along the axial direction O of the powertrain, but also from the direction along the output shaft hole radial direction R2, which is beneficial to smoother demolding process of the integrated housing 100 after die-casting. The reinforcing rib 140 bypasses the output shaft hole 160 from the direction of the output shaft hole 160 away from the power supply cavity 130, thereby increasing the overall length of the reinforcing rib 140, which is beneficial to increasing the contact area between the reinforcing rib 140 and the reducer cavity 110, and is beneficial to further improving the supporting effect of the reinforcing rib 140 on the reducer cavity 110, thereby improving the stiffness of the reducer cavity 110, and thereby improving the stiffness of the integrated housing 100, and thereby improving the NVH performance of the entire vehicle.

[0109] In the embodiment of the present application, the reinforcing ribs 140, the output shaft holes 160 and the power supply cavity 130 are sequentially arranged in a spaced order along the stacking direction X of the power supply cavity 130 and the reinforcing ribs 140. This is beneficial to provide more demolding directions for the reinforcing ribs 140, so that the reinforcing ribs 140 can be demolded not only in the direction along the axial direction O of the power assembly, but also in the direction perpendicular to the axial direction O of the power assembly, and the processing of the mold is also convenient.

[0110] Please continue reading Figure 5 In one embodiment, the integrated housing 100 further includes an output shaft hole 160, which is used to accommodate the half shaft of the differential. Along the axial direction O of the powertrain, the output shaft hole 160, the end of the reinforcing rib 140 away from the reducer cavity 110, and the end of the motor barrel 120 away from the reducer cavity 110 are sequentially arranged at intervals.

[0111] In the embodiment of the present application, along the axial direction O of the powertrain, the output shaft hole 160, the end of the reinforcing rib 140 away from the reducer cavity 110, and the end of the motor barrel 120 away from the reducer cavity 110 are arranged in sequence at intervals, which is beneficial for the reinforcing rib 140 to not occupy too much space of the powertrain 10 along the axial direction O of the powertrain, which is beneficial for the miniaturized arrangement of the powertrain 10, and also beneficial for the integrated housing 100 to be demolded in a direction perpendicular to the axial direction O of the powertrain after die-casting, which is beneficial for the smooth demolding process, and is beneficial for improving the die-casting quality and the quality of the integrated housing 100.

[0112] The powertrain and electric vehicle with three cavities connected by reinforcing ribs provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the ideas of the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A power assembly with three cavities connected by reinforcing ribs, characterized in that: The powertrain includes an integrated housing, which includes an integrally formed power supply cavity, a reducer cavity, a motor cylinder and reinforcing ribs, wherein the power supply cavity is used to accommodate at least one electrical component of a motor controller, an on-board charger and an on-board power distribution device, and the reducer cavity and the motor cylinder are used to accommodate a parallel shaft gear set and a stator of a motor, respectively, wherein: The reinforcing rib is used to connect the outer wall of each of the power supply cavity, the reducer cavity and the motor barrel. The reinforcing rib and the motor barrel are arranged on the same side of the reducer cavity along the axial direction of the power assembly. The reinforcing rib and the motor barrel are arranged along the radial direction of the power assembly. The power supply cavity is stacked on the reducer cavity, the motor barrel and the reinforcing rib in a direction perpendicular to the axial direction of the power assembly.

2. The powertrain according to claim 1, characterized in that: The length of the reinforcing rib along the axial direction of the power assembly is less than the length of the motor barrel; Along the stacking direction of the power supply cavity and the reinforcing rib, the inner diameter of the motor cylinder is greater than the length of the reinforcing rib.

3. The powertrain according to claim 1, characterized in that: The reinforcing rib includes a plurality of reinforcing bosses. Along the thickness direction of the reinforcing rib, the thickness of each of the reinforcing bosses is greater than the thickness of other parts of the reinforcing rib except the plurality of reinforcing bosses.

4. The powertrain according to any one of claims 1 to 3, characterized in that: The reinforcing rib comprises a first section, a middle section and a second section which are connected in sequence, the first section and the second section are respectively used to connect the outer wall of the power supply cavity and the outer wall of the motor barrel, and one end of the first section, the middle section and the second section toward the reducer cavity along the axial direction of the power assembly is used to connect the outer wall of the reducer cavity, wherein: The arrangement directions of the first section and the second section intersect with the axial direction of the powertrain and the radial direction of the powertrain.

5. The powertrain according to claim 4, characterized in that: The middle section is arc-shaped, and a position where the middle section is connected to at least one of the first section and the second section is transitioned through an arc-shaped structure.

6. The powertrain according to claim 4, characterized in that: The middle section is in an arc shape, and a position where the middle section is connected to at least one of the first section and the second section is tangent to the at least one.

7. The powertrain according to claim 4, characterized in that: Along the arrangement direction of the first segment and the second segment, the length of the middle segment is greater than the length of any one of the first segment and the second segment.

8. The powertrain according to claim 4, characterized in that: The first section is used to connect to the bottom plate of the power supply cavity, and the angle between the first section and the bottom plate of the power supply cavity is greater than or equal to 60° and less than or equal to 90°.

9. The powertrain according to claim 4, characterized in that: The value of the angle between the second section and the tangent of the outer wall of the motor barrel is greater than or equal to 60° and less than or equal to 90°.

10. The powertrain according to claim 4, characterized in that: The integrated housing includes a fixing boss, the fixing boss is used to fix the motor end cover, and the second section is used to connect the fixing boss, wherein: The fixing boss protrudes from the outer wall of the motor barrel away from the inner cavity of the motor barrel along the radial direction of the motor barrel, and the second section is spaced apart from the outer wall of the motor barrel.

11. The powertrain according to claim 4, characterized in that: Along the axial direction of the powertrain, a length of at least one of the second section and the first section is greater than a length of the middle section, and a portion of at least one of the second section and the first section protrudes from the middle section away from the reducer cavity.

12. The power assembly according to any one of claims 1-3, 5-11, characterized in that: The integrated housing further comprises an output shaft hole, wherein the output shaft hole is used to accommodate a half shaft of the differential, wherein: Along the radial direction of the output shaft hole, the output shaft hole, the reinforcing ribs and the motor barrel are sequentially arranged at intervals; Along the stacking direction of the power supply cavity and the reinforcing rib, the output shaft hole, the reinforcing rib and the power supply cavity are arranged in sequence and spaced apart.

13. The power assembly according to any one of claims 1-3, 5-11, characterized in that: The integrated housing includes an output shaft hole for accommodating a half shaft of a differential, wherein: Along the radial direction of the output shaft hole, the reinforcing ribs, the output shaft hole and the motor barrel are sequentially arranged at intervals; Along the stacking direction of the power supply cavity and the reinforcing rib, the reinforcing rib, the output shaft hole and the power supply cavity are arranged in sequence and spaced apart.

14. The power assembly according to any one of claims 1-3, 5-11, characterized in that: The integrated housing further comprises an output shaft hole, wherein the output shaft hole is used to accommodate a half shaft of the differential, wherein: Along the axial direction of the power assembly, the output shaft hole, the end of the reinforcing rib away from the reducer cavity and the end of the motor barrel away from the reducer cavity are arranged in sequence at intervals.

15. An electric vehicle, characterized in that: The electric vehicle comprises a frame, wheels and a power assembly as described in any one of claims 1 to 14, wherein the frame is used to fix the power assembly, and the power assembly drives the wheels to travel.

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