Integrated electric drive assembly housing and design method

Abstract

The application relates to the technical field of vehicles and discloses an integrated electric drive assembly shell and a design method, the integrated electric drive assembly shell comprising a reducer shell, a motor shell, a first reinforcing rib and a second reinforcing rib, the motor shell being integrally formed with the reducer shell, the first reinforcing rib being arranged in extension along the axial direction of the motor shell and connected to the motor shell and the reducer shell, the second reinforcing rib being arranged between the motor shell and the reducer shell and connected to the first reinforcing rib and arranged in extension along the end surface perpendicular to the first reinforcing rib, casting defects caused by excessively large local wall thickness are avoided, and the yield and quality of shell casting are improved. Under the action of the first reinforcing rib and the second reinforcing rib, the radial component force and the bending moment caused by the reducer output torque and the motor torque in the connecting area can be effectively resisted, the overall stiffness and the anti-vibration performance of the shell are improved, and the stability and the precision of power transmission between the motor and the reducer are ensured.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more particularly to an integrated electric drive assembly housing and its design method. Background Technology

[0002] In the field of new energy vehicles, in order to pursue a compact structure and lightweight design, the reducer housing and motor housing are usually integrated into one design. This integrated housing is not only used to accommodate the reduction gear set and the motor stator and rotor, but also needs to withstand the dynamic load and vibration generated by the internal transmission components.

[0003] To ensure the overall rigidity and vibration resistance of the housing in the connection area, maintain gear meshing accuracy, and suppress noise, a dense, thick, and continuous reinforcing rib structure is typically arranged in the transition area between the reducer housing and the motor housing. These reinforcing ribs usually strengthen weak sections by increasing material accumulation to resist mechanical deformation caused by torque transmission and rotor rotation. However, in the connection transition area between the reducer housing and the motor housing, due to the abrupt structural change and load transfer requirements, the wall thickness at this location is often significantly greater than in other parts of the housing. During the casting process, this excessive local wall thickness can lead to severe thermal defects, resulting in shrinkage cavities, porosity, and other casting defects. Summary of the Invention

[0004] According to one aspect of the present invention, an integrated electric drive assembly housing is provided to solve the aforementioned problems existing in the connection area between the reducer housing and the motor housing in the related art.

[0005] To address the aforementioned problems in the existing technology, the present invention adopts the following technical solution:

[0006] Integrated electric drive assembly housing, comprising:

[0007] Gearbox housing;

[0008] Motor housing, wherein the motor housing and the reducer housing are integrally formed;

[0009] A first reinforcing rib extends along the axial direction of the motor housing and is connected to the motor housing and the reducer housing.

[0010] A second reinforcing rib is disposed between the motor housing and the reducer housing. The second reinforcing rib is connected to the first reinforcing rib and extends along an end face perpendicular to the first reinforcing rib.

[0011] As an optional technical solution, the first reinforcing rib includes a connecting part, a supporting part, and an extension part. The two ends of the supporting part are respectively connected to the extension part and the connecting part. The connecting part is connected to the reducer housing, the extension part is connected to the motor housing, and the supporting part is connected to and supports the second reinforcing rib.

[0012] As an optional technical solution, there are two second reinforcing ribs, which are respectively arranged on both sides of the support part along the axial direction perpendicular to the motor housing.

[0013] As an optional technical solution, a third reinforcing rib is also included, which is disposed on the inner wall of the reducer housing and extends in the same direction as the extension portion.

[0014] As an optional technical solution, the inner wall of the reducer housing is provided with grooves, and there are multiple grooves, which are respectively arranged on both sides of the third reinforcing rib.

[0015] As an optional technical solution, a fourth reinforcing rib is also included. The fourth reinforcing rib is arranged around the outer periphery of the motor housing along the circumferential direction, and the two ends of the fourth reinforcing rib are respectively connected to the two second reinforcing ribs.

[0016] As an optional technical solution, there are multiple fourth reinforcing ribs, which are spaced apart along the axial direction of the motor housing.

[0017] As an optional technical solution, a fifth reinforcing rib is also included, which is disposed on the second reinforcing rib and connected to the first reinforcing rib, and the fifth reinforcing rib is inclined relative to the axial direction of the motor housing.

[0018] As an optional technical solution, a sixth reinforcing rib is also included, which is inclined relative to the axial direction of the motor housing and is staggered with the fourth reinforcing rib.

[0019] According to another aspect of the present invention, a design method for an integrated electric drive assembly housing is provided. Through the implementation of the above-described integrated electric drive assembly housing, the design method for the integrated electric drive assembly housing includes:

[0020] The first reinforcing rib is provided in the connection area between the reducer housing and the motor housing, and the first reinforcing rib extends along the axial direction of the motor housing.

[0021] A second reinforcing rib is provided in the connection area between the reducer housing and the motor housing, and the second reinforcing rib extends relative to the end face of the first reinforcing rib along an axial direction perpendicular to the motor housing.

[0022] The integrated electric drive assembly housing and design method provided by this invention have at least the following beneficial effects:

[0023] The integrated electric drive assembly housing includes a reducer housing, a motor housing, a first reinforcing rib, and a second reinforcing rib. The motor housing and reducer housing are integrally formed. The first reinforcing rib extends along the axial direction of the motor housing and connects the motor housing and the reducer housing. The second reinforcing rib is located between the motor housing and the reducer housing, connected to the first reinforcing rib, and extends along an end face perpendicular to the first reinforcing rib. While meeting the overall rigidity and vibration resistance requirements of the housing, this design effectively avoids casting defects such as shrinkage cavities, porosity, and hot spots caused by excessive local wall thickness, thus improving the yield and quality of the housing casting.

[0024] This integrated electric drive assembly housing design method, through the implementation of the integrated electric drive assembly housing, includes a first reinforcing rib in the connection area between the reducer housing and the motor housing, extending along the axial direction of the motor housing; and a second reinforcing rib in the connection area between the reducer housing and the motor housing, extending relative to the end face of the first reinforcing rib along an axial direction perpendicular to the motor housing. By optimizing the layout of the reinforcing ribs in the connection area between the reducer housing and the motor housing, while meeting structural strength requirements, it effectively avoids excessive local wall thickness in the connection area and significantly reduces the occurrence of casting defects. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the integrated electric drive assembly housing in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the reducer housing in an embodiment of the present invention;

[0027] Figure 3 This is a flowchart illustrating the design method of the integrated electric drive assembly housing in an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Gearbox housing; 11. Groove;

[0030] 2. Motor housing;

[0031] 3. First reinforcing rib; 31. Connecting part; 32. Supporting part; 33. Extension part;

[0032] 4. Second reinforcing rib;

[0033] 5. Third reinforcing rib;

[0034] 6. Fourth reinforcing rib;

[0035] 7. Fifth reinforcing rib;

[0036] 8. Sixth reinforcing rib. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] like Figures 1 to 2As shown, this embodiment provides an integrated electric drive assembly housing, which includes a reducer housing 1, a motor housing 2, a first reinforcing rib 3, and a second reinforcing rib 4. The motor housing 2 and the reducer housing 1 are integrally formed. The first reinforcing rib 3 extends along the axial direction of the motor housing 2 and connects the motor housing 2 and the reducer housing 1. The second reinforcing rib 4 is disposed between the motor housing 2 and the reducer housing 1, connects to the first reinforcing rib 3, and extends along an end face perpendicular to the first reinforcing rib 3.

[0042] In the diagram, AB represents the axial direction of motor housing 2. Reducer housing 1 and motor housing 2 are integrally formed using methods such as casting. Reducer housing 1 has an internal reducer cavity for accommodating the reduction gear set, and motor housing 2 has an internal motor cavity for accommodating the motor stator and rotor.

[0043] For example, the transition area between the reducer housing 1 and the motor housing 2 is a connection area. This connection area has to bear both the output torque of the motor and the external load at the output end of the reducer. This is a relatively complex area where the housing is subjected to stress.

[0044] One end of the first reinforcing rib 3 is connected to the reducer housing 1, and the other end of the first reinforcing rib 3 extends along the axial direction of the motor housing 2 on the outer periphery of the motor housing 2. The two ends of the second reinforcing rib 4 are connected to the outer peripheral walls of the reducer housing 1 and the motor housing 2, respectively. The end face of the second reinforcing rib 4 relative to the first reinforcing rib 3 extends perpendicular to the axial direction of the motor housing 2. That is, the demolding extension direction of the second reinforcing rib 4 is perpendicular to the axial direction of the motor housing 2. This effectively disperses and bears the load stress from the reducer and motor without increasing the main wall thickness of the connection area. Because the second reinforcing rib 4 is uniformly thin, it avoids casting defects such as shrinkage cavities, porosity, and hot spots caused by excessive local wall thickness in the connection area, thus improving the yield and quality of the housing casting. Under the action of the first reinforcing rib 3 and the second reinforcing rib 4, it can effectively resist the radial component force and bending moment generated by the reducer output torque and motor torque in the connection area, improving the overall rigidity and vibration resistance of the housing, and ensuring the stability and accuracy of power transmission between the motor and the reducer.

[0045] It should be noted that the extension direction and demolding direction of the second reinforcing rib 4 are both perpendicular to the axial direction of the motor housing 2. During casting, the mold opening direction is usually aligned with or perpendicular to the axial direction of the motor housing 2. In the first case, when the mold opening direction is axial, the second reinforcing rib 4 allows for natural demolding without the use of a complex lateral core-pulling mechanism. In the second case, when the mold opening direction is perpendicular to the axial direction, the second reinforcing rib 4 is positioned precisely on the parting surface or can be directly ejected along the main mold opening direction. This greatly simplifies the mold structure, reduces mold manufacturing costs and failure rates, and improves production efficiency.

[0046] The integrated electric drive assembly housing optimizes the layout of reinforcing ribs in the connection area between the reducer housing 1 and the motor housing 2, effectively avoiding excessive local wall thickness in the connection area while meeting structural strength requirements, and greatly reducing the occurrence of casting defects.

[0047] Furthermore, referring to Figure 1 The first reinforcing rib 3 includes a connecting part 31, a supporting part 32 and an extension part 33. The two ends of the supporting part 32 are respectively connected to the extension part 33 and the connecting part 31. The connecting part 31 is connected to the reducer housing 1, the extension part 33 is connected to the motor housing 2, and the supporting part 32 is connected to and supports the second reinforcing rib 4.

[0048] The connecting part 31 is fixedly connected to the outer peripheral wall of the reducer housing 1, the extension part 33 extends longitudinally along the surface of the motor housing 2, and the support part 32 is located between the connecting part 31 and the extension part 33 and is disposed in the connection area between the motor housing 2 and the reducer housing 1. A second reinforcing rib 4 is provided on the end face of the support part 32, and the extension direction of the second reinforcing rib 4 is perpendicular to the axial direction of the motor housing 2. By using the support part 32 of the first reinforcing rib 3 as the support of the second reinforcing rib 4, the load borne by the second reinforcing rib 4 is transferred more directly to the main body of the reducer housing 1 and the motor housing 2, which have stronger rigidity, thereby shortening the effective stress span of the second reinforcing rib 4 and significantly improving the stability and load-bearing limit of the structure.

[0049] The connection structure between the first reinforcing rib 3 and the second reinforcing rib 4 greatly improves the bending stiffness and torsional stiffness of the connection area between the reducer housing 1 and the motor housing 2, and effectively suppresses the local modal resonance of the housing caused by the high-speed operation of the motor and the meshing impact of the reducer.

[0050] Furthermore, continue to refer to Figure 1 There are two second reinforcing ribs 4, which are arranged on both sides of the support part 32 along the axial direction perpendicular to the motor housing 2.

[0051] Second reinforcing ribs 4, extending upwards and downwards respectively, are provided on both sides of the support portion 32 of the first reinforcing rib 3, forming an approximately symmetrical cross-sectional structure. When the connection area is subjected to radial positive and negative alternating bending moments caused by the output end of the reducer, the second reinforcing ribs 4 above and below the support portion 32 can alternately bear tensile and compressive stresses, greatly improving the fatigue resistance and connection stiffness of the shell.

[0052] Two second reinforcing ribs 4 extend upward and downward relative to the support portion 32, respectively, corresponding to the moving mold side and the fixed mold side in the casting mold. During mold opening, as the moving mold and fixed mold separate in a direction perpendicular to the axial direction, the second reinforcing rib 4 located in the moving mold and the second reinforcing rib 4 located in the fixed mold are released, while the first reinforcing rib 3 located in the middle is precisely at the parting surface. The entire reinforcing rib achieves direct and smooth demolding without any lateral core-pulling mechanism, eliminating the risk of flash and tearing, simplifying the mold structure, and reducing manufacturing costs.

[0053] Furthermore, referring to Figure 1 The integrated electric drive assembly housing also includes a third reinforcing rib 5, which is disposed on the inner wall of the reducer housing 1 and extends in the same direction as the extension 33. The inner wall of the reducer housing 1 has multiple grooves 11, which are respectively disposed on both sides of the third reinforcing rib 5.

[0054] The groove 11 is a recessed structure formed on the inner wall of the reducer housing 1, facing away from the center of the cavity. The groove 11 increases the moment of inertia of the inner cavity of the reducer housing 1 at that location. Combined with the reinforcing ribs on the outer periphery of the reducer housing 1, it enhances the reducer housing 1's ability to resist radial bending deformation. At the same time, the groove 11 contributes to the lightweighting of the reducer housing 1. It is essentially equivalent to forming a corrugated structure similar to a reinforcing rib on the inner wall surface of the reducer housing 1, thereby improving the local wall panel's resistance to instability and the overall bending stiffness.

[0055] A groove 11 is provided in the thick-walled area of ​​the reducer housing 1, which makes the wall thickness of the thicker part more uniform. This not only eliminates the hidden dangers of shrinkage cavities and porosity, but also facilitates the uniform shrinkage of the reducer housing 1 casting during the cooling process and reduces the internal stress of casting.

[0056] The third reinforcing rib 5 is a long, raised structure formed on the inner wall of the reducer housing 1, facing away from the center of the cavity. The extension direction of the third reinforcing rib 5 is parallel to the axial direction of the motor housing 2. The third reinforcing rib 5 serves as a local reinforcing rib on the inner wall surface of the reducer housing 1, preventing local wall instability and further improving bending resistance.

[0057] Preferably, there are multiple third reinforcing ribs 5 and grooves 11. All the third reinforcing ribs 5 are respectively arranged between two adjacent grooves 11. The grooves 11 play a role in removing redundancy and reducing weight, while the third reinforcing ribs 5 play a role in compensating for the local stiffness loss that may be caused by the grooves 11. They complement each other, so that the inner wall of the reducer housing 1 forms a continuous concave-convex cross-sectional profile in the circumferential direction, which greatly improves the deformation resistance of the inner wall of the reducer housing 1 and the torsional stiffness of the reducer housing 1.

[0058] Furthermore, continue to refer to Figure 1The integrated electric drive assembly housing also includes a fourth reinforcing rib 6. Along the circumferential direction of the motor housing 2, the fourth reinforcing rib 6 is arranged around the outer periphery of the motor housing 2, and the two ends of the fourth reinforcing rib 6 are respectively connected to two second reinforcing ribs 4.

[0059] The fourth reinforcing rib 6 extends along the outer circumference of the motor housing 2, forming a closed-loop structure. Its two ends are connected to the bidirectional second reinforcing rib 4, thus forming a complete circumferentially closed reinforcing ring. As an annular rib on the motor housing 2, it effectively constrains the elliptical deformation of the motor housing 2 under radial loads, improving the radial stiffness and bending resistance of the housing. When the motor outputs torque, the motor housing 2 bears the reaction torque, and the fourth reinforcing rib 6 effectively resists the torsional deformation of the motor housing 2, preventing warping of the cross-section. Simultaneously, the intersection of the fourth reinforcing rib 6 and the second reinforcing rib 4 in the connection area forms a high-rigidity reinforcing node, efficiently transferring and dispersing the torque load.

[0060] Preferably, there are multiple fourth reinforcing ribs 6, which are spaced apart along the axial direction of the motor housing 2, to further improve the radial stiffness and bending resistance of the motor housing 2, and to further resist the torsional deformation of the motor housing 2.

[0061] Furthermore, continue to refer to Figure 1 The integrated electric drive assembly housing also includes a fifth reinforcing rib 7, which is disposed on the second reinforcing rib 4 and connected to the first reinforcing rib 3, and the fifth reinforcing rib 7 is axially inclined relative to the motor housing 2.

[0062] The fifth reinforcing rib 7 transforms the load transfer path between the first reinforcing rib 3 and the second reinforcing rib 4 into a tensile-compressive force transfer along the extension direction of the fifth reinforcing rib 7, thereby reducing the stress concentration at the connection node. When the housing is subjected to radial alternating loads from the reducer end, the fifth reinforcing rib 7 can effectively share the bending moment borne by the root of the second reinforcing rib 4, preventing fatigue cracks from forming at the connection root between the second reinforcing rib 4 and the first reinforcing rib 3. The fifth reinforcing rib 7 is inclined relative to the axial direction of the motor housing 2, and the draft angle naturally formed on its side will not cause undercuts during the mold opening process perpendicular to the axial direction.

[0063] Furthermore, continue to refer to Figure 1 The integrated electric drive assembly housing also includes a sixth reinforcing rib 8, which is axially inclined relative to the motor housing 2, and the sixth reinforcing rib 8 is staggered with the fourth reinforcing rib 6.

[0064] The sixth reinforcing rib 8 and the fourth reinforcing rib 6 are staggered to form a local grid structure, allowing local loads to be diffused to a wider area through the grid path. When a point on the motor housing 2 is subjected to local impact or installation stress, the load can be transferred through the sixth reinforcing rib 8 to the adjacent fourth reinforcing rib 6, and then dispersed circumferentially by the fourth reinforcing rib 6, thus avoiding housing deformation or cracking caused by excessive local stress.

[0065] It should be noted that the cylindrical portion of the motor housing 2 typically has a thin wall thickness, making it prone to local buckling instability under axial pressure or radial compression. Preferably, there are multiple sixth reinforcing ribs 8, which are staggered with the fourth reinforcing ribs 6 to form multiple reinforcing nodes, dividing the originally large continuous thin-walled plate into several smaller polygonal sub-regions. The boundaries of each sub-region are supported and constrained by the reinforcing ribs, improving the buckling resistance of the motor housing 2 and enabling a lighter design under the same wall thickness conditions.

[0066] This embodiment also provides a design method for an integrated electric drive assembly housing, such as... Figure 3 As shown, through the implementation of the above-described integrated electric drive assembly housing, the design method of the integrated electric drive assembly housing includes:

[0067] A first reinforcing rib 3 is provided in the connection area between the reducer housing 1 and the motor housing 2, and the first reinforcing rib 3 extends along the axial direction of the motor housing 2.

[0068] At least two second reinforcing ribs 4 are provided in the connection area between the reducer housing 1 and the motor housing 2. Along the axial direction perpendicular to the motor housing 2, the multiple second reinforcing ribs 4 extend to both sides relative to the end face of the first reinforcing rib 3.

[0069] The transition area between the reducer housing 1 and the motor housing 2 is the connection region. One end of the first reinforcing rib 3 is connected to the reducer housing 1, and the other end of the first reinforcing rib 3 extends along the axial direction of the motor housing 2 on its outer periphery. The two ends of the second reinforcing rib 4 are connected to the outer peripheral walls of the reducer housing 1 and the motor housing 2, respectively. The end face of the second reinforcing rib 4 relative to the first reinforcing rib 3 extends perpendicular to the axial direction of the motor housing 2. That is, the demolding extension direction of the second reinforcing rib 4 is perpendicular to the axial direction of the motor housing 2. This effectively disperses and bears the load stress from the reducer and motor without increasing the main wall thickness of the connection region. While meeting structural strength requirements, it effectively avoids excessive local wall thickness in the connection region and greatly reduces the occurrence of casting defects.

[0070] Second reinforcing ribs 4, extending upwards and downwards respectively, are provided on both sides of the first reinforcing rib 3, forming an approximately symmetrical cross-sectional structure. When the connection area is subjected to radial alternating positive and negative bending moments caused by the output end of the reducer, the second reinforcing ribs 4 above and below the first reinforcing rib 3 can alternately bear tensile and compressive stresses, greatly improving the fatigue resistance and connection stiffness of the shell.

[0071] The integrated electric drive assembly housing design method provided in this embodiment includes the following: A first reinforcing rib 3 is provided in the connection area between the reducer housing 1 and the motor housing 2, extending along the axial direction of the motor housing 2; a second reinforcing rib 4 is provided in the connection area between the reducer housing 1 and the motor housing 2, extending relative to the end face of the first reinforcing rib 3 along an axial direction perpendicular to the motor housing 2. By optimizing the layout of the reinforcing ribs in the connection area between the reducer housing 1 and the motor housing 2, while meeting structural strength requirements, excessive local wall thickness in the connection area is effectively avoided, and the occurrence of casting defects is greatly reduced.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An integrated electric drive assembly housing, characterized in that, include: Gearbox housing (1); Motor housing (2), the motor housing (2) and the reducer housing (1) are integrally formed; The first reinforcing rib (3) extends along the axial direction of the motor housing (2) and is connected to the motor housing (2) and the reducer housing (1). The second reinforcing rib (4) is disposed between the motor housing (2) and the reducer housing (1). The second reinforcing rib (4) is connected to the first reinforcing rib (3), and the second reinforcing rib (4) extends along the end face perpendicular to the first reinforcing rib (3).

2. The integrated electric drive assembly housing according to claim 1, characterized in that, The first reinforcing rib (3) includes a connecting part (31), a supporting part (32) and an extension part (33). The two ends of the supporting part (32) are respectively connected to the extension part (33) and the connecting part (31). The connecting part (31) is connected to the reducer housing (1). The extension part (33) is connected to the motor housing (2). The supporting part (32) is connected to and supports the second reinforcing rib (4).

3. The integrated electric drive assembly housing according to claim 2, characterized in that, There are two second reinforcing ribs (4), which are arranged on both sides of the support part (32) along the axial direction perpendicular to the motor housing (2).

4. The integrated electric drive assembly housing according to claim 2, characterized in that, It also includes a third reinforcing rib (5), which is disposed on the inner wall of the reducer housing (1) and extends in the same direction as the extension (33).

5. The integrated electric drive assembly housing according to claim 4, characterized in that, The inner wall of the reducer housing (1) is provided with grooves (11), and there are multiple grooves (11), which are respectively arranged on both sides of the third reinforcing rib (5).

6. The integrated electric drive assembly housing according to claim 3, characterized in that, It also includes a fourth reinforcing rib (6), which is arranged around the outer periphery of the motor housing (2) along the circumferential direction of the motor housing (2), and the two ends of the fourth reinforcing rib (6) are respectively connected to the two second reinforcing ribs (4).

7. The integrated electric drive assembly housing according to claim 6, characterized in that, There are multiple fourth reinforcing ribs (6), and multiple fourth reinforcing ribs (6) are spaced apart along the axial direction of the motor housing (2).

8. The integrated electric drive assembly housing according to claim 6, characterized in that, It also includes a fifth reinforcing rib (7), which is disposed on the second reinforcing rib (4) and connected to the first reinforcing rib (3), and the fifth reinforcing rib (7) is inclined relative to the axial direction of the motor housing (2).

9. The integrated electric drive assembly housing according to claim 6, characterized in that, It also includes a sixth reinforcing rib (8), which is inclined relative to the axial direction of the motor housing (2), and the sixth reinforcing rib (8) is staggered with the fourth reinforcing rib (6).

10. A design method for an integrated electric drive assembly housing, characterized in that, The design method of the integrated electric drive assembly housing, as described in any one of claims 1-9, includes: The first reinforcing rib (3) is provided in the connection area between the reducer housing (1) and the motor housing (2), and the first reinforcing rib (3) extends along the axial direction of the motor housing (2); A second reinforcing rib (4) is provided in the connection area between the reducer housing (1) and the motor housing (2). The second reinforcing rib (4) extends relative to the end face of the first reinforcing rib (3) along the axial direction perpendicular to the motor housing (2).

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