The cover of the drive assembly housing, the drive assembly having it, and the vehicle.

Abstract

This invention discloses a cover plate for a drive assembly housing, a drive assembly having the same, and a vehicle. The drive assembly housing includes a lower housing and a cover plate. The lower housing has a mounting opening, and the cover plate closes onto the mounting opening. The cover plate includes a central arched area and a mounting area. The mounting area is an annular structure surrounding the central arched area and is used to contact and connect with the lower housing. The central arched area includes multiple curved panel areas that arch from the periphery towards the center in a direction away from the mounting opening. The electronic control cover plate of this application, by setting the central arched area and the mounting area, can increase the modulus of the electronic control cover plate and increase its natural frequency to a certain extent. This makes the natural frequency of the electronic control cover plate far away from the external excitation vibration frequency caused by the vibration of the drive motor, thereby reducing the resonance between the electronic control cover plate and the drive motor, reducing vibration and noise during drive assembly operation, and reducing resonance fatigue of the drive assembly structure.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a cover plate for a drive assembly housing, a drive assembly having the cover plate, and a vehicle. Background Technology

[0002] With the continuous development of hybrid vehicles, more and more vehicle designs are choosing rear-wheel drive three-in-one integrated systems. As a core component, the rear-wheel drive three-in-one electric drive system is receiving increasing attention. The rear-wheel drive three-in-one integrated system integrates the drive motor, motor controller, and gearbox into a single drive assembly that is matched to the entire vehicle.

[0003] The electronic control cover is an important component of the drive assembly. The drive motor, motor controller, and gearbox within the drive assembly generate vibrations during operation. When the natural frequency of the cover approaches the external excitation vibration frequency within the drive assembly, it can cause resonance in the cover, generating significant noise. Furthermore, prolonged resonance can lead to structural fatigue in the drive assembly, thus affecting its service life and stability. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a cover plate for a drive assembly housing, which can reduce resonance generated in the drive assembly.

[0005] The present invention also aims to provide a drive assembly having the above-described cover plate.

[0006] The present invention also aims to provide a vehicle having the above-described drive assembly.

[0007] According to an embodiment of the present invention, a cover plate for a drive assembly housing includes a lower housing and a cover plate. The lower housing has a mounting opening, and the cover plate covers the mounting opening. The cover plate includes a central arch area and a mounting area. The mounting area is an annular structure surrounding the central arch area and is used to contact and connect with the lower housing. The central arch area includes a plurality of curved panel areas that arch from the periphery to the center in a direction away from the mounting opening.

[0008] According to an embodiment of the present invention, the cover plate of the drive assembly housing includes a central arched area and a mounting area. The cover plate is connected to the lower housing through the mounting area. The mounting area has a large contact surface with the lower housing, ensuring a tight connection. The area enclosed by the mounting area in the cover plate is the arched central arched area, which arches along two diagonals of the cover plate. The cover plate as a whole has a diagonal arched structure, with the highest point at the center of the cover plate. The arch height decreases relative to the mounting area as it approaches the mounting area, until it reaches the mounting area. Compared to the uniform circumferential arched structure of the central arched area, this diagonal arched structure of the cover plate can increase the cover plate modulus and natural frequency to a certain extent, making the natural frequency of the cover plate far away from the external excitation vibration frequency caused by the vibration of the drive motor. This reduces the resonance between the cover plate and the drive motor, reduces the vibration and noise of the drive assembly during operation, and reduces the resonance fatigue of the drive assembly structure. Therefore, the overall NVH performance of the drive assembly can be improved.

[0009] In some embodiments, the mounting area is a polygonal ring structure including multiple sides and multiple corners, the central arch area has multiple curved edges that respectively connect the center of the central arch area and the multiple corners, a side connects two adjacent curved edges, and the curved panel area is formed between two adjacent curved edges and a corresponding side.

[0010] Furthermore, the mounting area is a rectangular ring structure comprising four sides and four corners, and the central arch area has four curved edges that respectively connect the center of the central arch area and the four corners.

[0011] Furthermore, the curved edge is an arc-shaped edge whose distance from the mounting area gradually increases in the direction from one end connected to the corner of the mounting area to the other end connected to the middle of the central arch area.

[0012] In some embodiments, the cover plate is provided with at least one reinforcing rib, which is at least partially located on the central arch area.

[0013] Preferably, the width of the reinforcing rib is less than or equal to 10 mm.

[0014] Furthermore, the reinforcing rib is a raised rib that arches away from the mounting opening, and the raised rib is integrally formed on the cover plate.

[0015] In some embodiments, there are multiple reinforcing ribs, one end of each reinforcing rib is located on the side of the mounting area, and the other end of each reinforcing rib intersects at the middle of the central arch area. The multiple reinforcing ribs divide the central arch area into multiple sub-areas.

[0016] Specifically, one of the sub-areas is provided with an inspection port.

[0017] In some specific embodiments, each side of the installation area is provided with a plurality of bolt mounting holes, and the plurality of bolt mounting holes are spaced apart along the perimeter of the installation area.

[0018] According to an embodiment of the present invention, a drive assembly includes: a lower housing having a mounting opening; a cover plate, which is any one of the cover plates described in the above embodiments, and the cover plate is fitted onto the mounting opening; and at least one of a drive motor, a motor controller, and a gearbox, which is installed inside the lower housing.

[0019] According to the drive assembly of the present invention, by adopting the cover plate of any of the above embodiments, resonance between the cover plate and the lower housing is less likely to occur, thereby reducing the overall vibration and noise of the drive assembly. At the same time, the structure of the drive assembly is less susceptible to resonance fatigue, which can increase the service life of the drive assembly and improve the overall NVH performance of the drive assembly.

[0020] The vehicle according to embodiments of the present invention includes the drive assembly described in any one of the above embodiments.

[0021] According to embodiments of the present invention, by employing the drive assembly of any of the above embodiments, the drive assembly generates less vibration and noise, thereby reducing vibration and noise during vehicle startup and improving the user experience. Simultaneously, the drive assembly has a longer service life, thereby extending the overall service life of the vehicle.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the cover plate of a drive assembly housing in the prior art;

[0025] Figure 2 for Figure 1 The modal distribution diagram of the cover plate shown is obtained through simulation analysis;

[0026] Figure 3 This is a top view of the cover plate of the drive assembly housing according to an embodiment of the present invention;

[0027] Figure 4 for Figure 3 Bottom view of the cover plate in the embodiment;

[0028] Figure 5 for Figure 3 Another top view of the cover plate in the embodiment;

[0029] Figure 6 for Figure 5 A cross-sectional view along the direction indicated by line AA;

[0030] Figure 7 for Figure 5 A cross-sectional view along the direction indicated by line BB;

[0031] Figure 8 for Figure 3 Modal distribution diagram of the cover plate in the embodiment obtained through simulation analysis;

[0032] Figure 9 This is a schematic diagram of the drive assembly according to an embodiment of the present invention.

[0033] Figure label:

[0034] Drive assembly 1000

[0035] Cover plate 100

[0036] Curved panel area S1,

[0037] 11. Central arch area; 12. Installation area; 13. Curved edge; 14. Reinforcing rib; 15. Inspection port; 16. Nameplate mounting area; 17. Bolt mounting holes.

[0038] Mounting port 200, lower housing 210. Detailed Implementation

[0039] 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.

[0040] In the description of this invention, it should be understood that the terms "center," "width," "thickness," "upper," "lower," "top," "inner," "outer," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0041] 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.

[0042] The following description, with reference to the accompanying drawings, describes a cover 100 of a drive assembly housing, a drive assembly 1000 having therein, and a vehicle according to an embodiment of the present invention.

[0043] According to an embodiment of the present invention, the cover plate 100 of the drive assembly housing is an important component of the drive assembly 1000 and is part of the housing of the drive assembly 1000. Figure 8 A drive assembly 1000 according to an embodiment of the present invention is shown. For example... Figure 8 As shown, the drive assembly 1000 housing includes a lower housing 210 and a cover plate 100. The drive assembly 1000 also includes at least one of a drive motor, a motor controller, and a gearbox, all of which are mounted within this housing. Figure 8 (Not shown in the diagram). The lower housing 210 has a mounting opening 200. The drive motor, motor controller, and gearbox are installed inside the lower housing 210. A cover plate 100 closes to the mounting opening 200 and is located above the motor controller. Thus, the cover plate 100 closes the mounting opening 200, improving the structural stability of the lower housing 210 and making the drive assembly 1000 more stable. Simultaneously, it makes the space inside the lower housing 210 more sealed, preventing dust and other impurities from falling into the drive assembly 1000, thereby making the operation of the drive assembly 1000 more stable.

[0044] To improve the overall NVH performance of the drive assembly 1000, this application modifies the shape of the cover plate 100. Figures 3-7 The cover 100 of the drive assembly according to an embodiment of the present invention is shown. As is known in the art, NVH is an abbreviation for Noise, Vibration, and Harshness, used to evaluate the vibration and noise conditions inside and outside the vehicle during idling and driving.

[0045] To better understand the impact of the improved cover plate 100 structure on the NVH performance of the drive assembly 1000, a comparison is first made with the shape of the cover plate 100 in the prior art.

[0046] Generally, the cover plate 100, being a thin-walled shell structure, has a low modal frequency. When the drive motor is running, if the modal frequency of the cover plate 100 approaches the external excitation frequency of the drive motor, it will cause a resonance band in the cover plate 100, generating radiated noise. This has a significant impact on the NVH performance of the drive assembly 1000. Prolonged resonance can cause resonant fatigue in the drive assembly 1000 structure, thereby affecting its fatigue life and the safe operation of the drive assembly 1000. Currently, most drive assemblies use a structure where the cover plate 100 is an integral planar protrusion with locally added reinforcing ribs 14. Figure 1 The diagram shows a cover plate 100 of the prior art. The cover plate 100 is a rectangular plate with a protruding plane. Because the planar area of ​​the cover plate 100 is relatively large and the span of the installation fixing points is also large, the structural strength of the cover plate 100 is limited, resulting in a small modulus and consequently a low natural frequency. Furthermore, due to limited space for the reinforcing ribs 14, the cover plate 100, after locally incorporating the reinforcing ribs 14, [refer to...]. Figure 2 As shown, its local natural frequency can only reach about 272Hz, which overlaps with the working vibration frequency of the drive motor, making it prone to resonance problems.

[0047] like Figures 3-5 As shown, to solve the above problems, the cover plate 100 of this application includes a central arch area 11 and a mounting area 12. The mounting area 12 is an annular structure surrounding the central arch area 11, and is used to contact and connect with the lower housing 210. The central arch area 11 includes multiple curved panel areas that arch from the periphery to the center in a direction away from the mounting opening 200.

[0048] In other words, the central arch area 11 forms a curved arched structure in any cross-section perpendicular to the installation area 12, for example, as Figure 6 As shown, the central arch area 11 has an arched cross-section along the diagonal 13, for example, as Figure 7 As shown, the central arch area 11 along Figure 5 The cross-section along the direction indicated by the BB line also forms an arched structure. The pressure on the central arch area 11 can be dispersed and transmitted to the installation area 12 along the arched structure. Therefore, the central arch area 11 has good load-bearing capacity. Setting the central arch area 11 can increase the structural strength of the cover plate 100, thereby increasing the modulus of the cover plate 100 and increasing the natural frequency of the cover plate 100 to a certain extent.

[0049] The cover 100 of the drive assembly of this application includes a central arch area 11 and a mounting area 12. The cover 100 is connected to the lower housing 210 through the mounting area 12. The mounting area 12 has a large contact surface with the lower housing 210, which can ensure a tight contact connection with the lower housing 210. The area enclosed by the mounting area 12 in the cover 100 is the arched central arch area 11, and the central arch area 11 arches along the two diagonals of the cover 100. The cover 100 as a whole has a diagonal arched structure, with the middle of the cover 100 as the highest point. The arch height relative to the mounting area 12 decreases as it moves towards the surrounding area, until it reaches the mounting area 12. Compared to the uniformly arched structure along the circumference of the central arch area 11, the diagonal arched structure of the cover plate 100 can increase the modulus and natural frequency of the cover plate 100 to a certain extent. This makes the natural frequency of the cover plate 100 far away from the external excitation vibration frequency caused by the vibration of the drive motor, thereby reducing the resonance between the cover plate 100 and the drive motor, reducing the vibration and noise of the drive assembly 1000 during operation, and reducing the resonant fatigue of the drive assembly 1000 structure. Therefore, the overall NVH performance of the drive assembly can be improved.

[0050] In some embodiments, such as Figures 3-5 As shown, the mounting area 12 is a polygonal ring structure including multiple sides and multiple corners. The central arch area 11 has multiple curved edges 13 that connect the middle of the central arch area 11 and multiple corners respectively. A side connects two adjacent curved edges 13, and a curved panel area S1 is formed between two adjacent curved edges 13 and the corresponding side. In this structure, the multiple curved panel areas S1 can disperse the external force on the cover plate 100, and the force on the curved panel area S1 can eventually be transmitted to its two adjacent curved edges 13 and the corresponding side, thereby improving the structural strength of the cover plate 100 and increasing the modulus of the cover plate 100.

[0051] In this application, the shape of the surrounding central arch region 11 of the installation area 12 is not limited; for example, in Figure 3 In the example, the mounting area 12 is rectangular and surrounds the central arch area 11. In this case, the central arch area 11 includes four curved panel areas, and the four sides of the mounting area 12 correspond one-to-one with the four curved panel areas. For another example, the mounting area 12 can be set as a ring surrounding the central arch area 11. In this case, the central arch area 11 forms a whole spherical curved panel area S1.

[0052] Furthermore, such as Figure 3 As shown, the mounting area 12 is a rectangular ring structure including four sides and four corners, and the central arch area 11 has four curved edges 13 that connect the middle and four corners of the central arch area 11 respectively. In this structure, a curved panel area S1 is formed between two adjacent curved edges 13 and a corresponding side, and the central arch area 11 is composed of four curved panel areas S1.

[0053] In some embodiments, such as Figure 5 , Figure 6 As shown, the curved edge 13 is an arc-shaped edge whose distance from the mounting area 12 gradually increases in the direction from one end connected to the corner of the mounting area 12 to the other end connected to the middle of the central arch area 11.

[0054] It is understandable that the edges of the arc-shaped lines are connected to form an arc-shaped line. The arc-shaped structure transmits force more evenly, and the structural strength of each part of the central arch area 11 is more similar. This makes the modulus of each part of the central arch area 11 more uniform, which is conducive to making the natural frequency of the cover plate 100 different from the external excitation frequency.

[0055] Furthermore, under this structure, the central part of the central arch area 11 is also formed into an arc-shaped surface, so that the central part of the central arch area 11 also has a more uniform force transmission effect, which can enhance the overall structural strength of the cover plate 100.

[0056] In some embodiments, such as Figure 5 As shown, the cover plate 100 is provided with at least one reinforcing rib 14, and the reinforcing rib 14 is at least partially located on the central arch region 11. Thus, the provision of the reinforcing rib 14 can increase the structural strength of the central arch region 11, improve the load-bearing capacity of the central arch region 11, thereby increasing the modulus and natural frequency of the cover plate 100.

[0057] Preferably, the width of the reinforcing rib 14 is less than or equal to 10 mm. In this structure, the reinforcing rib 14 has a good structural reinforcement effect on the central arch area 11, and will not affect the original structural strength of the curved panel area S1 of the central arch area 11, thus ensuring that the natural frequency of the cover plate 100 is low.

[0058] Furthermore, the reinforcing rib 14 is a raised rib that arches away from the mounting opening 200, and the raised rib is integrally formed on the cover plate 100. With this structure, the formation of the reinforcing rib 14 is relatively simple in terms of process, and no welding or other connection processes are required. The reinforcing rib 14 and the cover plate 100 are integrally structured, and the structure between the reinforcing rib 14 and the cover plate 100 is tight. The reinforcing rib 14 is not easy to fall off the cover plate 100, and the reinforcing rib 14 has a good structural reinforcement effect on the cover plate 100.

[0059] In this design, the number of reinforcing ribs 14 is not limited. Without affecting the original structural strength of the cover plate 100, the number of reinforcing ribs 14 can be arbitrary. For example, in... Figures 2-5 In the example, the reinforcing rib 14 can be set to four.

[0060] In some embodiments, such as Figure 5As shown, there are multiple reinforcing ribs 14. One end of each reinforcing rib 14 is located on the side of the installation area 12, and the other end of each reinforcing rib 14 intersects at the middle of the central arch area 11. At this time, the multiple reinforcing ribs 14 form a cross structure at the middle of the central arch area 11, which provides a more uniform structural reinforcement effect on the cover plate 100. At the same time, the multiple reinforcing ribs 14 divide the central arch area 11 into multiple sub-areas, making the area of ​​the sub-areas smaller, and the stress on the sub-areas can be borne by the reinforcing ribs 14, which can improve the structural strength of the cover plate 100, make the overall modulus of the cover plate 100 larger, and thus increase the natural frequency of the cover plate 100.

[0061] In this application, there is no limitation on the number of reinforcing ribs 14. For example, in Figure 5 In the example, four reinforcing ribs are set. In this case, two of the reinforcing ribs 14 are set parallel to the long side of the electric control cover plate 100, and the other two reinforcing ribs 14 are set parallel to the short side of the electric control cover plate 100. The four reinforcing ribs 14 are centrally symmetrically distributed relative to the center of the central arch area 11. The four reinforcing ribs 14 form a cross structure, which provides a more uniform structural reinforcement to the cover plate 100. At the same time, the four reinforcing ribs 14 divide the central arch area 11 into four sub-areas. The area of ​​the sub-areas is small, and the stress on the sub-areas can be borne by the reinforcing ribs 14, making the overall modulus of the cover plate 100 larger, thereby increasing the natural frequency of the cover plate 100.

[0062] Specifically, one of the sub-areas is provided with an inspection port 15. Thus, the provision of the inspection port 15 facilitates the maintenance of the drive assembly 1000. When it is necessary to perform maintenance on the interior of the lower housing 210 of the drive assembly 1000, it can be done through the inspection port 15 without removing the cover plate 100 from the drive assembly 1000, making the maintenance of the drive assembly 1000 more convenient.

[0063] It should be noted that in the actual use of the drive assembly 1000, each drive assembly 1000 needs to be numbered to distinguish each specific drive assembly. Therefore, each drive assembly 1000 can be easily distinguished by setting a nameplate mounting point 16, which can be set on a sub-area opposite to the sub-area where the inspection port 15 is located.

[0064] In this application, the sub-area can be structurally reinforced at both the access port 15 and the nameplate mounting location 16 in different ways to avoid affecting the overall modulus of the cover plate 100. For example, the structural thickness of the sub-area can be increased, or additional reinforcing ribs 14 can be provided at the access port 15 or the nameplate mounting location 16.

[0065] exist Figures 3-5 and Figure 9In the specific example, the cover plate 100 is provided with four reinforcing ribs 14, and also has an inspection port 15 and a nameplate mounting location 16. After performing modal analysis on the cover plate 100, it can be found that the local natural frequency of the cover plate 100 can reach 396Hz, which is 45.6% higher than the existing 272Hz. This allows the local natural frequency of the cover plate 100 to be further separated from the operating vibration frequency of the drive motor, reducing the possibility of resonance between the two.

[0066] In some specific embodiments, such as Figure 5 , Figure 9 As shown, each side of the mounting area 12 is provided with multiple bolt mounting holes 17, which are spaced apart along the perimeter of the mounting area 12. Thus, the bolt mounting holes 17 can be used for bolt connections. By aligning the bolt mounting holes 17 on the cover plate 100 with the mounting positions on the lower housing 210, the cover plate 100 can be fixedly connected to the drive assembly 1000 through the engagement of bolts in the bolt mounting holes 17. Furthermore, the presence of bolt mounting holes 17 along the circumference of the mounting area 12 ensures a tighter connection between the cover plate 100 and the drive assembly 1000, resulting in a smaller gap between the cover plate 100 and the lower housing 210, reducing the likelihood of relative vibration.

[0067] like Figure 9 As shown, the drive assembly 1000 according to an embodiment of the present invention includes: a lower housing 210, a cover plate 100, and at least one of a drive motor, a motor controller, and a gearbox.

[0068] The lower housing 210 is provided with a mounting opening 200. The cover plate 100 is any of the cover plate 100 described above, and the cover plate 100 fits onto the mounting opening 200. The drive motor, motor controller, and gearbox are installed inside the lower housing 210.

[0069] The drive assembly 1000 of this application, by adopting the cover plate 100 of the drive assembly of any of the above embodiments, can make it less likely for resonance to occur between the cover plate 100 and the drive motor, thereby reducing the overall vibration and noise of the drive assembly 1000. At the same time, the structure of the drive assembly 1000 is less susceptible to resonance fatigue, which can increase the service life of the drive assembly 1000.

[0070] The vehicle according to an embodiment of the present invention includes the drive assembly 1000 of any of the above embodiments.

[0071] The vehicle of this application, by employing the drive assembly 1000 of any of the above embodiments, generates less vibration and noise, thereby reducing vibration and noise during vehicle startup and improving the user experience. Simultaneously, the drive assembly 1000 has a longer service life, thus extending the overall service life of the vehicle.

[0072] The cover 100 of the drive assembly, the drive assembly 1000, and other components and operations of the vehicle having the drive assembly according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0073] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cover plate for driving assembly housing, the driving assembly housing comprising a lower housing (210) and a cover plate (100), the lower housing (210) being provided with a mounting opening (200), and the cover plate (100) being covered at the mounting opening (200), characterized in that, The cover plate (100) includes a central arch area (11) and a mounting area (12). The mounting area (12) is an annular structure surrounding the central arch area (11). The mounting area (12) is used to contact and connect with the lower housing (210). The central arch area (11) includes multiple curved panel areas (S1) that arch from the periphery to the center toward the direction away from the mounting opening (200). The mounting area (12) is a polygonal ring structure including multiple sides and multiple corners. The central arch area (11) has multiple curved edges (13) that connect the middle of the central arch area (11) and multiple corners respectively. A side is connected between two adjacent curved edges (13). The curved panel area (S1) is formed between two adjacent curved edges (13) and a corresponding side. The curved edge (13) is an arc-shaped edge whose distance from the mounting area (12) gradually increases from one end connected to the corner of the mounting area (12) to the other end connected to the middle of the central arch area (11).

2. The cover plate of a drive assembly housing according to claim 1, wherein, The installation area (12) is a rectangular ring structure including four sides and four corners, and the central arch area (11) has four curved edges (13) that respectively connect the middle of the central arch area (11) and the four corners.

3. The cover plate of a drive assembly housing according to claim 1, wherein, The cover plate (100) is provided with at least one reinforcing rib (14), and the reinforcing rib (14) is at least partially located on the central arch area (11).

4. The cover plate of a drive assembly housing according to claim 3, characterized in that The width of the reinforcing rib (14) is less than or equal to 10 mm.

5. The cover plate of a drive assembly housing according to claim 3, wherein, The reinforcing rib (14) is a raised rib that arches toward the direction away from the mounting opening (200), and the raised rib is integrally formed on the cover plate (100).

6. The cover plate of the drive assembly housing according to claim 3, characterized in that, There are multiple reinforcing ribs (14), one end of each reinforcing rib (14) is located on the side of the installation area (12), and the other end of each reinforcing rib (14) intersects at the middle of the central arch area (11). The multiple reinforcing ribs (14) divide the central arch area (11) into multiple sub-areas.

7. The cover plate of the drive assembly housing according to claim 6, characterized in that, One of the sub-areas is provided with an inspection port (15).

8. The cover plate of the drive assembly housing according to any one of claims 1-7, characterized in that, Each side of the installation area (12) is provided with a plurality of bolt mounting holes (17), which are spaced apart along the perimeter of the installation area (12).

9. A drive assembly, characterized in that, include: The lower housing (210) is provided with a mounting port (200). A cover plate (100), the cover plate (100) being the cover plate (100) according to any one of claims 1-8, the cover plate (100) fitting onto the mounting port (200); At least one of the drive motor, motor controller and gearbox is installed in the lower housing (210).

10. A vehicle, characterized in that, Includes the drive assembly (1000) according to claim 9.

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