Electric drive end cover and electric drive assembly

Abstract

The utility model relates to an electric drive end cover and electric drive assembly, include: first layer department, first layer department has first surface and second surface, first surface and second surface are opposite to set along the thickness direction of first layer department, first surface is equipped with first bearing groove and second bearing groove, first layer department has interval arrangement's first concave -convex structure, second concave -convex structure and third concave -convex structure, first concave -convex structure, second concave -convex structure and third concave -convex structure all are in first surface convex setting, and recessed setting at second surface, first concave -convex structure surrounds first bearing groove, second concave -convex structure surrounds second bearing groove, and third concave -convex structure is located between first concave -convex structure and second concave -convex structure. The electric drive end cover of utility model embodiment not only structural strength is high, but also can reduce the transmission between two bearing grooves, improves NVH performance.

Description

Technical Field

[0001] This utility model relates to the field of electric drive technology, specifically to an electric drive end cover and an electric drive assembly. Background Technology

[0002] With the rapid development of electric drive assemblies, the design and function of the electric drive housing, as a key component that supports and mounts motors, bearings and other parts, have a significant impact on the continuous power, energy consumption and NVH (Noise, Vibration and Harshness) performance of the electric drive assembly.

[0003] Currently, integration, lightweighting, and high strength are the mainstream design principles for electric drive housings. Integration requires that the electric drive assembly integrate at least two motors. The bearings of the two motors are both mounted on the same electric drive end cover. The area of ​​the electric drive end cover located between the two bearings is prone to stress concentration, which can lead to deformation and affect the performance of the electric drive assembly.

[0004] To address the aforementioned issues, electric drive assemblies in related technologies typically incorporate reinforcing ribs on the electric drive end cover. However, if the reinforcing ribs are too low, it is difficult to guarantee strength; if they are too high, it increases the thickness of the electric drive end cover, affecting the layout, weight, and cost of the electric drive assembly, and also leading to poor NVH performance. Utility Model Content

[0005] One objective of this utility model is to provide an electric drive end cover to solve the problem that stress concentration and deformation easily occur in the area between two bearings in the existing electric drive end cover; the second objective is to provide an electric drive assembly.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An electric drive end cap includes: a first layer having a first surface and a second surface, the first surface and the second surface being disposed opposite to each other along the thickness direction of the first layer; the first surface having a first bearing groove and a second bearing groove; the first layer having a first concave-convex structure, a second concave-convex structure and a third concave-convex structure disposed at intervals; the first concave-convex structure, the second concave-convex structure and the third concave-convex structure all protruding from the first surface and recessed from the second surface; the first concave-convex structure surrounding the first bearing groove; the second concave-convex structure surrounding the second bearing groove; and the third concave-convex structure located between the first concave-convex structure and the second concave-convex structure.

[0008] According to the above-mentioned technical means, by setting a first concave-convex structure around the first bearing groove and a second concave-convex structure around the second bearing groove, the structural strength of the area where the first and second bearing grooves are located can be increased, which is beneficial to increasing the load capacity of the electric drive end cover. The third concave-convex structure can enhance the structural strength of the area between the two bearing grooves, thereby reducing the probability of deformation in the area between the two bearing grooves and improving the performance of the electric drive assembly. In addition, the concave-convex structure of this utility model embodiment can not only strengthen the structural strength, but also affect the continuity of outward force transmission in the area where the two bearing grooves are located, further reducing the probability of deformation in the area between the two bearing grooves, which is beneficial to improving NVH performance. Moreover, the thickness of each area of ​​the electric drive end cover is the same or approximately the same, which avoids the problem of excessive local thickness of the electric drive end cover caused by setting reinforcing ribs. While meeting the load-bearing capacity of the electric drive end cover, the thickness of the electric drive end cover is still small, achieving the purpose of reducing cost and weight. The installation space required for the electric drive end cover is relatively small, which is conducive to the miniaturization of the electric drive assembly.

[0009] Furthermore, on a plane perpendicular to the thickness direction of the electric drive end cover, the center points of the orthographic projections of the first concave-convex structure, the second concave-convex structure, and the third concave-convex structure are located on the same straight line.

[0010] Based on the above technical means, the areas where the first concave-convex structure, the second concave-convex structure, and the third concave-convex structure are located are roughly symmetrically arranged with respect to the line connecting the center points of the three structures. This can increase the uniformity of the structural strength of the electric drive end cover, provide greater strength to the electric drive end cover, and help enhance the strength and rigidity of the electric drive end cover near the bearing groove.

[0011] Furthermore, the first concave-convex structure has a cross-sectional structure perpendicular to the thickness direction of the electric drive end cover that is annular; and / or, the second concave-convex structure has a cross-sectional structure perpendicular to the thickness direction of the electric drive end cover that is annular; and / or, the third concave-convex structure has a cross-sectional structure perpendicular to the thickness direction of the electric drive end cover that is circular or annular.

[0012] Based on the above technical means, the first concave-convex structure, the second concave-convex structure, and the third concave-convex structure are subjected to more uniform stress, which can avoid the problem of damage caused by local stress concentration and improve the service life of the electric drive end cover.

[0013] Furthermore, the protrusion height of the first concave-convex structure on the first surface is h1, the protrusion height of the second concave-convex structure on the first surface is h2, and the protrusion height of the third concave-convex structure on the first surface is h3, where h1 = h2, and / or h1 > h3, and / or h2 > h3.

[0014] Based on the above technical means, while ensuring the structural strength near the bearing groove, the protrusion height of the third concave-convex structure is reduced, thereby reducing cost and weight.

[0015] Furthermore, the electric drive end cover also includes a second layer, which is located on the side of the first layer facing away from the first surface and connected to the second surface. The second layer is provided with a suspension mounting point, and the orthographic projection of the suspension mounting point is spaced apart from the orthographic projection of the first layer on a plane perpendicular to the thickness direction of the electric drive end cover.

[0016] Based on the above technical means, on the one hand, the surface area of ​​the electric drive end cover can be increased, thereby increasing the heat dissipation efficiency of the electric drive end cover; on the other hand, the electric drive end cover forms a multi-layer structure, which can improve the structural strength of the electric drive end cover.

[0017] Furthermore, on a plane perpendicular to the thickness direction of the electric drive end cover, the orthographic projections of the first layer and the second layer have different shapes.

[0018] Based on the above technical means, the modal performance of the electric drive end cover is improved, and the overall strength of the electric drive end cover is enhanced.

[0019] Furthermore, the electric drive end cover also includes a third layer, which is located on the side of the first layer facing away from the second surface and connected to the first surface, and the third layer extends circumferentially along the first layer.

[0020] Based on the above technical means, on the one hand, the surface area of ​​the electric drive end cover can be increased. The three-layer structure can increase the surface area by at least 25%, thereby increasing the heat dissipation efficiency of the electric drive end cover. On the other hand, the electric drive end cover forms a three-layer structure, which can also improve the structural strength of the electric drive end cover.

[0021] Furthermore, the first surface is provided with a first reinforcing rib, and the first, second, and third concave-convex structures are all connected to the first reinforcing rib; and / or, the second surface is provided with a second reinforcing rib, and on a plane perpendicular to the thickness direction of the electric drive end cover, the orthographic projections of the first, second, and third concave-convex structures all intersect with the orthographic projection of the second reinforcing rib; and / or, the first surface is provided with a third reinforcing rib, and the portion of the second layer extending beyond the edge of the first layer, the third layer, and the third concave-convex structure are all connected to the third reinforcing rib; and / or, the second surface is provided with a fourth reinforcing rib, and the portion of the third layer extending beyond the edge of the first layer and the second layer are all connected to the fourth reinforcing rib.

[0022] Based on the above technical means, the strength and modality of the electric drive end cover are improved, and the probability of stress deformation in the area where the second concave-convex structure is located is reduced.

[0023] Furthermore, the third layer has a first pry point groove and a second pry point groove on the side facing away from the first surface. The first pry point groove and the second pry point groove are arranged circumferentially along the third layer. On a plane perpendicular to the thickness direction of the electric drive end cover, the orthographic projection areas of the first pry point groove and the second pry point groove are different.

[0024] Based on the above technical means, it is possible to adapt to pry bars of different sizes, increasing the ease of disassembling the electric drive end cover.

[0025] An electric drive assembly includes the aforementioned electric drive end cover.

[0026] The beneficial effects of this utility model are:

[0027] (1) By setting a first concave-convex structure around the first bearing groove and a second concave-convex structure around the second bearing groove, the structural strength of the area where the first and second bearing grooves are located can be increased, which is beneficial to increasing the load capacity of the electric drive end cover. The third concave-convex structure can enhance the structural strength of the area between the two bearing grooves, thereby reducing the probability of deformation in the area between the two bearing grooves and improving the performance of the electric drive assembly. In addition, the concave-convex structure of this utility model embodiment can not only strengthen the structural strength, but also affect the continuity of outward force transmission in the area where the two bearing grooves are located, further reducing the probability of deformation in the area between the two bearing grooves, which is beneficial to improving NVH performance. Moreover, the thickness of each area of ​​the electric drive end cover is the same or approximately the same, which will not cause the problem of excessive local thickness of the electric drive end cover as with the setting of reinforcing ribs. While meeting the load-bearing capacity of the electric drive end cover, the thickness of the electric drive end cover is still small, achieving the purpose of reducing cost and weight. The installation space required for the electric drive end cover is relatively small, which is beneficial to the miniaturization of the electric drive assembly.

[0028] (2) The areas where the first concave-convex structure, the second concave-convex structure and the third concave-convex structure are located are roughly symmetrical about the line connecting the center points of the three structures. This can increase the uniformity of the structural strength of the electric drive end cover, provide greater strength to the electric drive end cover, and help enhance the strength and rigidity of the electric drive end cover near the bearing groove.

[0029] (3) The first, second and third concave-convex structures are subjected to more uniform stress, which can avoid the problem of damage caused by local stress concentration and improve the service life of the electric drive end cover.

[0030] (4) While ensuring the structural strength of the area near the bearing groove and between the two bearing grooves, reduce the protrusion height of the third concave-convex structure to reduce cost and weight.

[0031] (5) On the one hand, it can increase the surface area of ​​the electric drive end cover, thereby increasing the heat dissipation efficiency of the electric drive end cover. On the other hand, the electric drive end cover forms a multi-layer structure, which can improve the structural strength of the electric drive end cover.

[0032] (6) Improved modal performance of the electric drive end cover and enhanced overall strength of the electric drive end cover.

[0033] (7) On the one hand, it can increase the surface area of ​​the electric drive end cover. The three-layer structure can increase the surface area by at least 25%, thereby increasing the heat dissipation efficiency of the electric drive end cover. On the other hand, the electric drive end cover forms a three-layer structure, which can also improve the structural strength of the electric drive end cover.

[0034] (8) Improve the strength and modality of the electric drive end cover and reduce the probability of stress deformation in the area where the second concave-convex structure is located.

[0035] (9) It can adapt to pry bars of different sizes, increasing the ease of disassembling the electric drive end cover. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is one of the structural schematic diagrams of the electric drive end cover in the embodiments of this utility model.

[0038] Figure 2 It is along Figure 1 A cross-sectional view along line AA in the middle.

[0039] Figure 3 This is the second schematic diagram of the structure of the electric drive end cover in this utility model embodiment.

[0040] Figure 4 It is along Figure 3 A cross-sectional view along the BB line.

[0041] Figure 5 This is a partial schematic diagram of the electric drive end cover in an embodiment of this utility model.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Electric drive end cover;

[0044] 100, First layer; 110, First surface; 111, First bearing groove; 112, Second bearing groove; 120, Second surface; 130, First concave-convex structure; 140, Second concave-convex structure; 150, Third concave-convex structure;

[0045] 200. Second layer; 210. Suspension mounting point;

[0046] 300, Third layer; 310, Threaded hole;

[0047] 410. First reinforcing rib; 420. Second reinforcing rib; 430. Third reinforcing rib; 440. Fourth reinforcing rib;

[0048] 510. First pry point groove; 520. Second pry point groove;

[0049] 600, resolver stator slot; 700, sensor mounting point. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0051] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0052] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0053] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0054] This utility model embodiment proposes an electric drive end cover 1, which includes a first layer 100.

[0055] The first layer 100 has a first surface 110 and a second surface 120, which are disposed opposite to each other along the thickness direction of the first layer 100. The first surface 110 is provided with a first bearing groove 111 and a second bearing groove 112. The first layer 100 has a first concave-convex structure 130, a second concave-convex structure 140 and a third concave-convex structure 150 disposed at intervals. The first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 are all provided to protrude from the first surface 110 and to be recessed from the second surface 120. The first concave-convex structure 130 surrounds the first bearing groove 111, the second concave-convex structure 140 surrounds the second bearing groove 112, and the third concave-convex structure 150 is located between the first concave-convex structure 130 and the second concave-convex structure 140.

[0056] For example, the electric drive end cover 1 can be made of high-strength magnesium alloy to reduce its weight. The first surface 110 is also provided with a first resolver stator slot 600 and a second resolver stator slot 600. The first resolver stator slot 600 is connected to the first bearing slot 111, and the diameter of the first resolver stator slot 600 can be larger than the diameter of the first bearing slot 111. The second resolver stator slot 600 is connected to the second bearing slot 112, and the diameter of the second resolver stator slot 600 can be larger than the diameter of the second bearing slot 112.

[0057] By providing a first bearing groove 111 and a second bearing groove 112, the first bearing groove 111 can be used to fix the bearing of one motor, and the second bearing groove 112 can be used to fix the bearing of another motor. Therefore, the electric drive end cover 1 is suitable for electric drive assemblies integrating dual motors. By providing a first concave-convex structure 130 surrounding the first bearing groove 111 and a second concave-convex structure 140 surrounding the second bearing groove 112, the structural strength of the area where the first bearing groove 111 and the second bearing groove 112 are located can be increased. This helps to increase the load capacity of the electric drive end cover 1 and prevents the area near the first bearing groove 111 and the second bearing groove 112 from deforming due to the rotation of the dual motors.

[0058] In addition, the third concave-convex structure 150 can enhance the structural strength of the area between the two bearing grooves, thereby reducing the probability of deformation in the area between the two bearing grooves, extending the service life of the electric drive end cover 1, and improving the performance of the electric drive assembly.

[0059] Furthermore, compared to setting reinforcing ribs around the bearing grooves on the electric drive end cover, the concave-convex structure of this utility model embodiment not only strengthens the structural strength but also affects the continuity of outward force transmission in the areas where the two bearing grooves are located, further reducing the probability of deformation in the area between the two bearing grooves, which is beneficial to improving NVH performance. Moreover, the thickness of each area of ​​the electric drive end cover 1 is the same or approximately the same, which avoids the problem of excessive local thickness of the electric drive end cover 1 caused by setting reinforcing ribs. The wall thickness of the first layer 100 can be 4mm to 7mm, for example, 4mm, 5mm, 6mm or 7mm. While ensuring that the electric drive end cover 1 can bear the maximum load, the thickness of the electric drive end cover 1 is still relatively small, achieving the purpose of reducing cost and weight. The installation space required for the electric drive end cover 1 is relatively small, which is conducive to the miniaturization of the electric drive assembly, so that the electric drive end cover 1 is applicable to a wider range of electric drive assemblies, and the application range of the electric drive assembly is also increased accordingly.

[0060] In some embodiments, such as Figure 1 and Figure 3 As shown, on a plane perpendicular to the thickness direction of the electric drive end cover 1, the center point of the orthographic projection of the first concave-convex structure 130, the center point of the orthographic projection of the second concave-convex structure 140, and the center point of the orthographic projection of the third concave-convex structure 150 are located on the same straight line.

[0061] In this way, the areas where the first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 are located are roughly symmetrical about the line connecting their center points. This can increase the uniformity of the structural strength of the electric drive end cover 1, avoid local stress concentration, provide greater strength to the electric drive end cover 1, and help enhance the strength and rigidity of the electric drive end cover 1 near the bearing groove.

[0062] In some embodiments, such as Figure 1 and Figure 3 As shown, the cross-section of the first concave-convex structure 130 perpendicular to the thickness direction of the electric drive end cover 1 is annular; or, the cross-section of the second concave-convex structure 140 perpendicular to the thickness direction of the electric drive end cover 1 is annular; or, the cross-section of the third concave-convex structure 150 perpendicular to the thickness direction of the electric drive end cover 1 is circular or annular; or, two of the first concave-convex structures 130, the second concave-convex structure 140, and the third concave-convex structure 150 perpendicular to the thickness direction of the electric drive end cover 1 are annular; or, all of the first concave-convex structures 130, the second concave-convex structure 140, and the third concave-convex structure 150 are annular in cross-section perpendicular to the thickness direction of the electric drive end cover 1.

[0063] In this way, the first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 are subjected to more uniform stress, which can avoid the problem of damage caused by local stress concentration and improve the service life of the electric drive end cover 1.

[0064] In some embodiments, such as Figure 3 and Figure 4 As shown, the first concave-convex structure 130 protrudes to a height of h1 on the first surface 110, the second concave-convex structure 140 protrudes to a height of h2 on the first surface 110, and the third concave-convex structure 150 protrudes to a height of h3 on the first surface 110, where h1 > h3, h2 > h3, or h1 = h2. h1 is not shown in the figure, but can be referenced to the diagram of h2.

[0065] For example, h1 can be 5mm to 10mm, h2 can be 5mm to 10mm, and h2 can be 5mm to 10mm.

[0066] In this way, while ensuring the structural strength of the area near the bearing groove and between the two bearing grooves, the protrusion height of the third concave-convex structure 150 is reduced, thereby lowering cost and weight. Furthermore, the first concave-convex structure 130 and the second concave-convex structure 140 have approximately the same height, which reduces manufacturing complexity.

[0067] Furthermore, such as Figures 1-4 As shown, the electric drive end cover 1 also includes a second layer 200, which is located on the side of the first layer 100 facing away from the first surface 110. The second layer 200 is connected to the second surface 120 and has a suspension mounting point 210. The height difference between the first layer 100 and the second layer 200 can be 5mm to 15mm. Furthermore, the second layer 200 and the first layer 100 are integrally cast to increase structural strength.

[0068] By setting the second layer 200, on the one hand, the surface area of ​​the electric drive end cover 1 can be increased, thereby increasing the heat dissipation efficiency of the electric drive end cover 1; on the other hand, the electric drive end cover 1 forms a multi-layer structure, which can improve the structural strength of the electric drive end cover 1.

[0069] Furthermore, on a plane perpendicular to the thickness direction of the electric drive end cover 1, the orthographic projection of the suspension mounting point 210 is spaced apart from the orthographic projection of the first layer 100. In this way, when the suspension mounting point 210 is used with a suspension structure such as a hook, interference between the suspension structure such as the hook and the first layer 100 can be avoided, thus improving the ease of installation.

[0070] In some embodiments, such as Figure 1 and Figure 3As shown, the orthographic projections of the first layer 100 and the second layer 200 are different in shape on a plane perpendicular to the thickness direction of the electric drive end cover 1. For example, on a plane perpendicular to the thickness direction of the electric drive end cover 1, the orthographic projection shape of the first layer 100 can be constructed as an ellipse or approximately an ellipse. An ellipse provides more uniform stress distribution and stronger strength. While accommodating two bearings, it also helps reduce the probability of the first layer 100 being damaged due to excessive local stress. The orthographic projection shape of the second layer 200 can be constructed as a rectangle.

[0071] By setting the orthographic projections of the first layer 100 and the second layer 200 to different shapes, the number of modes of the electric drive end cover 1 between 1Hz and 3000Hz can be effectively reduced, the modal performance of the electric drive end cover 1 can be improved, and the overall strength of the electric drive end cover 1 can be enhanced.

[0072] In some embodiments, such as Figure 1 and Figure 3 As shown, the electric drive end cover 1 also includes a third layer 300, which is located on the side of the first layer 100 facing away from the second surface 120. The third layer 300 is connected to the first surface 110 and extends circumferentially along the first layer 100. For example, the third layer 300 is provided with a threaded hole 310. The electric drive assembly includes a threaded component, an electric drive housing, and an electric drive end cover 1. The threaded component passes through the threaded hole 310 and is threadedly connected to the motor housing.

[0073] For example, the thickness of the third layer 300 can be greater than the thickness of the first layer 100 to increase the upper limit of the stress on the mounting point of the electric drive end cover 1 and prevent damage to the electric drive end cover 1. Furthermore, the third layer 300 and the first layer 100 are integrally cast to increase structural strength. The height difference between the first layer 100 and the third layer 300 can be 5mm to 15mm. A sensor mounting point 700 can be provided on the third layer 300 for mounting a sensor.

[0074] By setting the third layer 300, the surface area of ​​the electric drive end cover 1 can be increased. The three-layer structure can increase the surface area by at least 25%, thereby increasing the heat dissipation efficiency of the electric drive end cover 1. On the other hand, the electric drive end cover 1 forms a three-layer structure, which can also improve the structural strength of the electric drive end cover 1.

[0075] In some embodiments, such as Figure 3 As shown, the first surface 110 is provided with a first reinforcing rib 410, and the first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 are all connected to the first reinforcing rib 410. The first reinforcing rib 410, the first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 are integrally cast.

[0076] For example, there can be multiple first reinforcing ribs 410, which are spaced apart along their width direction. The height of the first reinforcing ribs 410 can be 2mm to 6mm, such as 2mm, 3mm, 4mm, 5mm or 6mm, and the width can be 5mm to 8mm, such as 5mm, 6mm, 7mm or 8mm.

[0077] By setting the first reinforcing rib 410, the first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 can be connected. The first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 can transmit force through the first reinforcing rib 410, thereby improving the strength and modality of the electric drive end cover 1 and reducing the probability of deformation under force in the area where the second concave-convex structure 140 is located.

[0078] Furthermore, such as Figure 1 As shown, the second surface 120 is provided with a second reinforcing rib 420. On a plane perpendicular to the thickness direction of the electric drive end cover 1, the orthographic projections of the first concave-convex structure 130, the second concave-convex structure 140, and the third concave-convex structure 150 all intersect with the orthographic projection of the second reinforcing rib 420. The second reinforcing rib 420, the first concave-convex structure 130, the second concave-convex structure 140, and the third concave-convex structure 150 are integrally cast.

[0079] For example, there can be multiple second reinforcing ribs 420, which are spaced apart along their width direction. The height of the second reinforcing ribs 420 can be 2mm to 6mm, such as 2mm, 3mm, 4mm, 5mm or 6mm, and the width can be 5mm to 8mm, such as 5mm, 6mm, 7mm or 8mm.

[0080] By setting the second reinforcing rib 420, the first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 can be connected. The first concave-convex structure 130, the second concave-convex structure 140 and the third concave-convex structure 150 can transmit force through the second reinforcing rib 420, thereby improving the strength and modality of the electric drive end cover 1 and reducing the probability of deformation under force in the area where the second concave-convex structure 140 is located.

[0081] Furthermore, on a plane perpendicular to the thickness direction of the electric drive end cover 1, the orthographic projections of the first reinforcing rib 410 and the second reinforcing rib 420 can coincide or approximately coincide. This further improves the strength and modality of the electric drive end cover 1 and reduces the probability of deformation under stress in the area where the second concave-convex structure 140 is located.

[0082] Furthermore, such as Figure 3As shown, the first surface 110 is provided with a third reinforcing rib 430, and the portion of the second layer 200 extending beyond the edge of the first layer 100, the third layer 300, and the third concave-convex structure 150 are all connected to the third reinforcing rib 430. The third reinforcing rib 430, the first concave-convex structure 130, the second concave-convex structure 140, and the third concave-convex structure 150 are integrally cast.

[0083] For example, the third reinforcing rib 430 and the first reinforcing rib 410 are intersecting to form at least one "well" shaped structure. The third reinforcing rib 430 can extend to the vicinity of the threaded hole 310 of the third layer 300. There can be multiple third reinforcing ribs 430, which are spaced apart along their width direction. The height of the third reinforcing rib 430 can be 2mm to 6mm, such as 2mm, 3mm, 4mm, 5mm or 6mm, and the width can be 5mm to 8mm, such as 5mm, 6mm, 7mm or 8mm.

[0084] By cooperating with the third reinforcing rib 430 and the first reinforcing rib 410, the multiple first reinforcing ribs 410 and the multiple third reinforcing ribs 430 can transmit force to each other, which helps to distribute the force on the electric drive end cover 1 more evenly, avoid excessive local stress, further improve the strength and modality of the electric drive end cover 1, reduce the probability of deformation under stress in the area where the second concave-convex structure 140 is located, and the third reinforcing rib 430 increases the structural strength near the threaded hole 310 of the third layer 300, thereby improving the safety and reliability of the electric drive end cover 1.

[0085] Furthermore, the second surface 120 is provided with a fourth reinforcing rib 440, and the portion of the third layer 300 extending beyond the edge of the first layer 100 and the second layer 200 are both connected to the fourth reinforcing rib 440. The fourth reinforcing rib 440, the first concave-convex structure 130, the second concave-convex structure 140, and the third concave-convex structure 150 are integrally cast.

[0086] For example, the fourth reinforcing rib 440 and the second reinforcing rib 420 are intersected to form at least one "well" shaped structure. The fourth reinforcing rib 440 can extend to the vicinity of the threaded hole 310 of the third layer 300. There can be multiple fourth reinforcing ribs 440, which are spaced apart along their width direction. The height of the fourth reinforcing rib 440 can be 2mm to 6mm, such as 2mm, 3mm, 4mm, 5mm or 6mm, and the width can be 5mm to 8mm, such as 5mm, 6mm, 7mm or 8mm.

[0087] With the cooperation of the fourth reinforcing rib 440 and the second reinforcing rib 420, the multiple first reinforcing ribs 410 and the multiple third reinforcing ribs 430 can transmit force to each other, which helps to distribute the force on the electric drive end cover 1 more evenly, avoid excessive local stress, further improve the strength and modality of the electric drive end cover 1, reduce the probability of deformation under stress in the area where the second concave-convex structure 140 is located, and the fourth reinforcing rib 440 increases the structural strength near the threaded hole 310 of the third layer 300, thereby improving the safety and reliability of the electric drive end cover 1.

[0088] Furthermore, on a plane perpendicular to the thickness direction of the electric drive end cover 1, the orthographic projections of the third reinforcing rib 430 and the fourth reinforcing rib 440 can be approximately overlapped. This further improves the strength and modality of the electric drive end cover 1 and reduces the probability of deformation under stress in the area where the second concave-convex structure 140 is located.

[0089] Furthermore, such as Figure 1 and Figure 5 As shown, the third layer 300 has a first pry point groove 510 and a second pry point groove 520 on the side facing away from the first surface 110. The first pry point groove 510 and the second pry point groove 520 are arranged circumferentially along the third layer 300. On a plane perpendicular to the thickness direction of the electric drive end cover 1, the projected areas of the first pry point groove 510 and the second pry point groove 520 are different.

[0090] For example, there can be multiple first pry point slots 510 and multiple second pry point slots 520. Multiple first pry point slots 510 are arranged at intervals along the circumference of the electric drive end cover 1, and multiple second pry point slots 520 are arranged at intervals along the circumference of the electric drive end cover 1. In this way, the electric drive end cover 1 can be disassembled from different angles, which improves the ease of disassembling the electric drive end cover 1.

[0091] By providing the first pry point groove 510 and the second pry point groove 520, different sized pry bars can be accommodated, increasing the ease of disassembly of the electric drive end cover 1. The first pry point groove 510 and the second pry point groove 520 can be connected, facilitating manufacturing. Furthermore, since both the first pry point groove 510 and the second pry point groove 520 are integrally cast with the third layer 300, the strength and modality of the electric drive end cover 1 are enhanced.

[0092] This utility model embodiment also proposes an electric drive assembly, including the aforementioned electric drive end cover 1, electric drive housing, first motor, second motor, first bearing and second bearing. The first bearing is sleeved on the motor shaft of the first motor and is located in the first bearing groove 111. The second bearing is sleeved on the motor shaft of the second motor and is located in the second bearing groove 112. Both the first motor and the second motor are located inside the motor housing. The electric drive end cover 1 is installed on the first motor housing.

[0093] The electric drive assembly of this utility model embodiment, by utilizing the aforementioned electric drive end cover 1, can improve working performance and extend service life.

[0094] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

[0095] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electric drive end cap, characterized in that, include: A first layer (100) has a first surface (110) and a second surface (120). The first surface (110) and the second surface (120) are disposed opposite to each other along the thickness direction of the first layer (100). The first surface (110) is provided with a first bearing groove (111) and a second bearing groove (112). The first layer (100) has a first concave-convex structure (130), a second concave-convex structure (140), and a third concave-convex structure (150) disposed at intervals. The first concave-convex structure (130), the second concave-convex structure (140), and the third concave-convex structure (150) are all protruding on the first surface (110) and recessed on the second surface (120). The first concave-convex structure (130) surrounds the first bearing groove (111), the second concave-convex structure (140) surrounds the second bearing groove (112), and the third concave-convex structure (150) is located between the first concave-convex structure (130) and the second concave-convex structure (140).

2. The electric drive end cover according to claim 1, characterized in that, On a plane perpendicular to the thickness direction of the electric drive end cover (1), the center point of the orthographic projection of the first concave-convex structure (130), the center point of the orthographic projection of the second concave-convex structure (140), and the center point of the orthographic projection of the third concave-convex structure (150) are located on the same straight line.

3. The electric drive end cover according to claim 1, characterized in that, The first concave-convex structure (130) has a circular cross-section perpendicular to the thickness direction of the electric drive end cover (1); And / or, the second concave-convex structure (140) has a cross-sectional structure that is annular perpendicular to the thickness direction of the electric drive end cap (1); And / or, the cross-sectional structure of the third concave-convex structure (150) perpendicular to the thickness direction of the electric drive end cover (1) is circular or annular.

4. The electric drive end cover according to claim 1, characterized in that, The first concave-convex structure (130) protrudes at a height of h1 on the first surface (110), the second concave-convex structure (140) protrudes at a height of h2 on the first surface (110), and the third concave-convex structure (150) protrudes at a height of h3 on the first surface (110), where h1 = h2, and / or h1 > h3, and / or h2 > h3.

5. The electric drive end cover according to any one of claims 1-4, characterized in that, The electric drive end cover (1) also includes: The second layer (200) is located on the side of the first layer (100) facing away from the first surface (110) and connected to the second surface (120). The second layer (200) is provided with a suspension mounting point (210). On a plane perpendicular to the thickness direction of the electric drive end cover (1), the orthographic projection of the suspension mounting point (210) is spaced apart from the orthographic projection of the first layer (100).

6. The electric drive end cover according to claim 5, characterized in that, On a plane perpendicular to the thickness direction of the electric drive end cover (1), the orthographic projections of the first layer (100) and the second layer (200) have different shapes.

7. The electric drive end cover according to claim 5, characterized in that, The electric drive end cover (1) also includes: A third layer (300) is located on the side of the first layer (100) facing away from the second surface (120) and connected to the first surface (110), and the third layer (300) extends circumferentially along the first layer (100).

8. The electric drive end cover according to claim 7, characterized in that, The first surface (110) is provided with a first reinforcing rib (410), and the first concave-convex structure (130), the second concave-convex structure (140) and the third concave-convex structure (150) are all connected to the first reinforcing rib (410); And / or, the second surface (120) is provided with a second reinforcing rib (420), and on a plane perpendicular to the thickness direction of the electric drive end cover (1), the orthographic projection of the first concave-convex structure (130), the orthographic projection of the second concave-convex structure (140) and the orthographic projection of the third concave-convex structure (150) are all intersected with the orthographic projection of the second reinforcing rib (420); And / or, the first surface (110) is provided with a third reinforcing rib (430), and the portion of the second layer (200) extending beyond the edge of the first layer (100), the third layer (300) and the third concave-convex structure (150) are all connected to the third reinforcing rib (430); And / or, the second surface (120) is provided with a fourth reinforcing rib (440), and the portion of the third layer (300) extending beyond the edge of the first layer (100) and the second layer (200) are both connected to the fourth reinforcing rib (440).

9. The electric drive end cover according to claim 7, characterized in that, The third layer (300) is provided with a first pry point groove (510) and a second pry point groove (520). The first pry point groove (510) and the second pry point groove (520) are arranged circumferentially along the third layer (300). On a plane perpendicular to the thickness direction of the electric drive end cover (1), the orthographic projection area of ​​the first pry point groove (510) and the orthographic projection area of ​​the second pry point groove (520) are different.

10. An electric drive assembly, characterized in that, Includes the electric drive end cap (1) as described in any one of claims 1-9.

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