Electric drive assembly and vehicle
Patent Information
- Application Number
- CN202522214526.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-20
AI Technical Summary
[0003]然而目前导油槽大多会在其边缘产生应力集中现象，导致壳体结构强度下降，影响其使用寿命和可靠性
[0015]本申请有益效果是：区别于现有技术的情况，本申请提供的电驱总成及车辆，该电驱总成包括电驱壳体，电驱壳体设有轴承室和导油槽，沿着第一方向，轴承室相对电驱壳体的表面凹陷，导油槽包括依次连接的第一槽段、台阶段和第二槽段，第一槽段远离第二槽段的一端连通电驱壳体的表面，第二槽段远离第一槽段的一端连通轴承室，第二槽段位于第一槽段靠近轴承室中心的一侧，其中，第一方向与电驱壳体的表面所在平面方向垂直。通过依次连接的第一槽段、台阶段和第二槽段使得导油槽整体呈阶梯状，分散了导油槽边缘的应力集中，可以减少局部应力集中现象，还可以提升电驱壳体的整体强度，减少在高负荷或长时间运行中的变形量，从而延长电驱壳体的使用寿命及提高可靠性。
Smart Images
Figure CN224843338U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle technology, specifically to an electric drive assembly and a vehicle. Background Technology
[0002] Lightweight and high-power electric drive assemblies are the main development directions at present. The strength of the electric drive housing is an important factor determining the size and weight of the electric drive assembly. Among them, the oil guide groove is an important part of the electric drive design. The structural design of the oil guide groove has a critical impact on the housing strength, determining its load-bearing capacity and fatigue life.
[0003] However, most oil guide grooves currently exhibit stress concentration at their edges, leading to a decrease in the strength of the shell structure and affecting its service life and reliability. Utility Model Content
[0004] This application provides an electric drive assembly and vehicle that can reduce stress concentration in the oil guide groove, thereby improving the strength of the electric drive housing, extending its service life and improving its reliability.
[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide an electric drive assembly, which includes an electric drive housing, a bearing chamber and an oil guide groove. Along a first direction, the bearing chamber is recessed relative to the surface of the electric drive housing. The oil guide groove includes a first groove segment, a step segment and a second groove segment connected in sequence. The end of the first groove segment away from the second groove segment is connected to the surface of the electric drive housing, and the end of the second groove segment away from the first groove segment is connected to the bearing chamber. The second groove segment is located on the side of the first groove segment near the center of the bearing chamber. The first direction is perpendicular to the plane direction of the surface of the electric drive housing.
[0006] The extension direction of the stage is parallel to the first direction. On the side away from the electric drive housing, the bottom wall of the second slot section and the bottom wall of the stage have a first inclination angle between 90 degrees and 180 degrees. The second slot section includes a first end and a second end opposite to each other. The first end is provided with a first rounded corner protruding towards the bearing chamber. The first end is connected to the stage through the first rounded corner, and the second end is connected to the bearing chamber.
[0007] The oil guide groove also includes a third groove section, which is connected to the bearing chamber; the second end is provided with a second rounded corner that is recessed away from the bearing chamber, and the second end is connected to the third groove section through the second rounded corner.
[0008] In this section, on the side facing the electric drive housing, there is a second inclination angle between the bottom wall of the first slot section and the bottom wall of the stage section. The second inclination angle is between 90 degrees and 180 degrees and is smaller than the first inclination angle.
[0009] The oil guide groove also includes a fourth groove segment, the extension direction of which is perpendicular to the first direction; the fourth groove segment includes a third end and a fourth end opposite to each other, the third end is connected to the surface of the electric drive housing, the fourth end is connected to the first groove segment, and on the side facing the electric drive housing, the bottom wall of the fourth end has a third inclination angle with the bottom wall of the first groove segment.
[0010] In particular, from the fourth section to the third section, the width of the oil guide groove gradually decreases.
[0011] Along the first direction, the height difference between the two ends of the first groove segment is less than the height difference between the two ends of the second groove segment.
[0012] The surface of the electric drive housing is also provided with oil baffles, which are connected to the wall of one side of the oil guide groove.
[0013] The number of oil guide grooves is at least two, and the at least two oil guide grooves are stacked together along the first direction in a stepped shape.
[0014] This application also includes a second technical solution, providing a vehicle including the above-described electric drive assembly.
[0015] The beneficial effects of this application are as follows: Unlike existing technologies, the electric drive assembly and vehicle provided in this application include an electric drive housing. The electric drive housing has a bearing chamber and an oil guide groove. Along a first direction, the bearing chamber is recessed relative to the surface of the electric drive housing. The oil guide groove includes a first groove segment, a stepped section, and a second groove segment connected in sequence. The end of the first groove segment away from the second groove segment connects to the surface of the electric drive housing, and the end of the second groove segment away from the first groove segment connects to the bearing chamber. The second groove segment is located on the side of the first groove segment near the center of the bearing chamber. The first direction is perpendicular to the plane of the electric drive housing surface. The sequential connection of the first groove segment, the stepped section, and the second groove segment makes the oil guide groove as a whole stepped, dispersing the stress concentration at the edge of the oil guide groove, reducing local stress concentration, and improving the overall strength of the electric drive housing. This reduces deformation under high load or long-term operation, thereby extending the service life of the electric drive housing and improving its reliability. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the structure of an embodiment of the electric drive assembly of this application; Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the electric drive assembly in the middle; Figure 3 yes Figure 2 A magnified structural diagram of part B in the middle; Figure 4 yes Figure 1 A magnified schematic diagram of part A in the middle.
[0017] Reference numerals: 1. Electric drive housing; 2. Bearing chamber; 3. Oil guide groove; 31. First groove segment; 32. Second groove segment; 321. First end; 322. Second end; 323. First fillet; 324. Second fillet; 33. Third groove segment; 34. Fourth groove segment; 341. Third end; 342. Fourth end; 35. Stage; 4. Oil baffle; 100. Electric drive assembly. Detailed Implementation
[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.
[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0020] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.
[0021] In the description of this application, it should be noted that, unless otherwise expressly 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0022] Please refer to the reference. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of the electric drive assembly provided in this application. Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the electric drive assembly. In one aspect, an electric drive assembly 100 is provided, comprising an electric drive housing 1, a bearing chamber 2, and an oil guide groove 3. Along a first direction D1, the bearing chamber 2 is recessed relative to the surface of the electric drive housing 1. The oil guide groove 3 includes a first groove segment 31, a step segment 35, and a second groove segment 32 connected sequentially. The end of the first groove segment 31 away from the second groove segment 32 communicates with the surface of the electric drive housing 1, and the end of the second groove segment 32 away from the first groove segment 31 communicates with the bearing chamber 2. The second groove segment 32 is located on the side of the first groove segment 31 near the center of the bearing chamber 2. The first direction D1 is perpendicular to the plane direction of the surface of the electric drive housing 1. The oil guide groove 3 is stepped as a whole by connecting the first groove segment 31, the step 35 and the second groove segment 32 in sequence, which disperses the stress concentration at the edge of the oil guide groove 3, reduces the phenomenon of local stress concentration, and can also improve the overall strength of the electric drive housing 1, reduce the amount of deformation under high load or long-term operation, thereby extending the service life of the electric drive housing 1 and improving its reliability.
[0023] Specifically, the bearing chamber 2 of the electric drive housing 1 is recessed vertically relative to the housing surface, forming a recessed structure. Lubricating oil can flow from the surface of the electric drive housing 1 along the sidewall of the recessed structure to the bearing chamber 2. The oil guide groove 3 includes a first groove segment 31, a stepped section 35, and a second groove segment 32 connected in sequence. The end of the first groove segment 31 away from the second groove segment 32 is connected to the surface of the electric drive housing 1, and the end of the second groove segment 32 away from the first groove segment 31 is connected to the bearing chamber 2. The second groove segment 32 is located entirely on the side of the first groove segment 31 closest to the center of the bearing chamber 2. The stepped section 35, as a structure with a sudden change in depth, realizes a gradual transition in the depth of the oil guide groove 3 from shallow to deep. The first groove segment 31, the stepped section 35, and the second groove segment 32 together form a stepped structure with varying cross-sectional thickness, that is, the thickness of the electric drive housing 1 gradually increases towards the bearing chamber 2, increasing the local wall thickness of the recessed structure. This structural design improves the overall strength of the electric drive housing 1 by increasing the local wall thickness and dispersing stress, reducing the amount of deformation under high load or long-term operation, thereby extending the service life of the housing and improving reliability. Meanwhile, the variable cross-section stepped structure is versatile and can be adapted to different models of electric drive housing 1, which improves the compatibility of platform design and meets the requirements of lightweight and high reliability of electric drive assembly 100.
[0024] like Figure 2 and Figure 3 As shown, Figure 3 yes Figure 2A magnified structural diagram of part B in the middle. In one embodiment of this application, the extension direction of the stage 35 is parallel to the first direction D1. On the side away from the electric drive housing 1, the bottom wall of the second groove segment 32 and the bottom wall of the stage 35 have a first inclination angle A1, which is between 90 degrees and 180 degrees. The second groove segment 32 includes a first end 321 and a second end 322 opposite to each other. The first end 321 is provided with a first rounded corner 323 protruding towards the bearing chamber 2. The first end 321 is connected to the stage 35 through the first rounded corner 323, and the second end 322 is connected to the bearing chamber 2.
[0025] Specifically, the extension direction of the stage 35 is parallel to the first direction D1, meaning that lubricating oil can flow vertically downwards along the stage 35 relative to the surface of the electric drive housing 1. The first inclination angle A1 can be an obtuse angle, such as 135°, 140°, 145°, 150°, etc., so that the second groove segment 32 is an inclined groove segment relative to the surface of the electric drive housing 1, so as to facilitate a smooth transition between the stage 35 and the second groove segment 32 and reduce the risk of stress concentration. The first end 321 of the second groove segment 32 can serve as the inlet end of the lubricating oil. Since the transition from the inlet end to the middle section of the second groove segment 32 is from horizontal to vertical, and the wall thickness of the electric drive housing 1 is relatively thin here, the arc design of the raised first rounded corner 323 can increase the effective thickness of the transition area and disperse the stress here to make the stress distribution uniform, improve or avoid stress concentration and crack initiation at the transition, and also reduce fluid resistance, guiding the lubricating oil to converge towards the bearing chamber 2 along the second groove segment 32.
[0026] By limiting the first inclination angle A1 between the bottom wall of the second groove segment 32 and the bottom wall of the platform segment 35 to the range of 90 degrees to 180 degrees, the sharp transition at the junction is improved or avoided, the stress concentration points at the edge of the oil guide groove 3 are dispersed, and the local stress peak is reduced. Simultaneously, the raised design of the first fillet 323 provides an additional smooth transition, further alleviating the stress concentration phenomenon at the connection. Therefore, the overall strength of the electric drive housing 1 is improved, the stress concentration problem at the edge of the oil guide groove 3 is significantly reduced, the deformation of the electric drive housing 1 under high load and long-term use is reduced, and its service life is extended, while maintaining good lubrication performance and structural compatibility.
[0027] In one embodiment of this application, the oil guide groove 3 further includes a third groove segment 33, which is connected to the bearing chamber 2; the second end 322 is provided with a second rounded corner 324 that is recessed away from the bearing chamber 2, and the second end 322 is connected to the third groove segment 33 through the second rounded corner 324.
[0028] Specifically, the second end 322 can serve as the outlet end of the lubricating oil on the second groove section 32, that is, the lubricating oil flows out from the second end 322 to the third groove section 33. Since the transition from the middle section of the second groove section 32 to the outlet end is from vertical to horizontal, the concave arc design of the second fillet 324 can create a partial low-pressure zone in the oil guide groove 3, forming a partial pressure difference with the inlet end to accelerate oil flow. At the same time, it can also eliminate the sharp corner residue from casting and improve or avoid stress concentration at this point.
[0029] Furthermore, this concave-convex design can achieve an optimal balance between mechanical performance, fluid performance, and manufacturability through bi-curvature synergistic optimization. Finite element simulation verification shows that this design reduces the PEEQ (Equivalent Plastic Strain) value at the edge of bearing housing 2 from 0.04% of the traditional structure to 0, reducing deformation under high loads, extending the service life of electric drive housing 1, and enhancing the compatibility of electric drive housing 1 across different platform models.
[0030] In one embodiment of this application, on the side facing the electric drive housing 1, there is a second tilt angle A2 between the bottom wall of the first groove section 31 and the bottom wall of the stage section 35. The second tilt angle A2 is between 90 degrees and 180 degrees, and the second tilt angle A2 is smaller than the first tilt angle A1.
[0031] Specifically, the second tilt angle A2 is also an obtuse angle, making the first groove segment 31 also an inclined groove segment relative to the surface of the electric drive housing 1, so as to achieve a smooth transition between the first groove segment 31 and the surface of the electric drive housing 1 and reduce the risk of stress concentration. At the same time, by making the second tilt angle A2 smaller than the first tilt angle A1, the tilt degree of the first groove segment 31 is less than the tilt degree of the second groove segment 32. For example, when the first tilt angle A1 is 150 degrees, the second tilt angle A2 can be set to 120 degrees, thereby optimizing the stress transmission path.
[0032] By limiting the second tilt angle A2 to the range of 90 to 180 degrees, the oil guide groove 3 avoids the formation of sharp edges at the connection between the stage 35 and the first groove section 31, effectively dispersing stress concentration and making the stress distribution of the electric drive housing 1 more uniform. At the same time, the design that the second tilt angle A2 is smaller than the first tilt angle A1 further enhances the gradualness of the transition and reduces the generation of local high-stress areas.
[0033] In one embodiment of this application, the oil guide groove 3 further includes a fourth groove segment 34, the extension direction of the fourth groove segment 34 being perpendicular to the first direction D1; the fourth groove segment 34 includes a third end 341 and a fourth end 342 opposite to each other, the third end 341 communicating with the surface of the electric drive housing 1, the fourth end 342 communicating with the first groove segment 31, and on the side facing the electric drive housing 1, the bottom wall of the fourth end 342 and the bottom wall of the first groove segment 31 have a third inclination angle A3.
[0034] Specifically, the extension direction of the fourth groove segment 34 is perpendicular to the first direction D1, meaning the fourth groove segment 34 is parallel to the surface of the electric drive housing 1. The third tilt angle A3 allows for a smooth transition from the fourth groove segment 34 to the first groove segment 31. The addition of the fourth groove segment 34 optimizes the oil flow path of the oil guide groove 3, resulting in a more uniform distribution of lubricating oil upon entering the oil guide groove 3. This avoids sharp turns and local turbulence at the connection point, effectively reducing stress concentration. The design of the third tilt angle A3 further smooths the oil flow transition, preventing stress abrupt changes and resulting in a more uniform stress distribution in the bearing chamber 2 area of the housing. Specifically, compared to the traditional straight oil guide groove 3, this structure significantly reduces the stress peak at the housing edge. Finite element analysis verifies that the stress concentration area is reduced by approximately 90%, deformation is reduced by 30%, extending the service life of the electric drive assembly 100 while maintaining good lubrication compatibility and improving the overall structural reliability and platform adaptability.
[0035] Furthermore, the fourth groove segment 34, the first groove segment 31, the stepped section 35, the second groove segment 32, and the third groove segment 33 are sequentially connected to form a stepped structure with a variable cross-section. When the lubricating oil flows along the oil guide groove 3 to the bearing chamber 2, the horizontal fourth groove segment 34 and the inclined first groove segment 31 and second groove segment 32 can disperse stress concentration, improve or avoid the phenomenon of local stress concentration. The inclined first groove segment 31 and second groove segment 32 can also increase the thickness of the local electric drive housing 1, further improving the strength of the housing. The stepped section 35 can accelerate the flow rate of the lubricating oil and improve the flow efficiency of the oil guide groove 3.
[0036] Please continue to refer to the reference. Figure 4 , Figure 4 yes Figure 1 A magnified structural diagram of part A in the middle. In one embodiment of this application, the width of the oil guide groove 3 gradually decreases from the fourth groove segment 34 to the third groove segment 33.
[0037] Specifically, the width of the oil guide groove 3 gradually decreases from the fourth groove section 34 to the third groove section 33. The fourth groove section 34 is close to the inlet of the lubricating oil flow, and the third groove section 33 is close to the outlet of the lubricating oil flow. The width smoothly transitions from a larger width in the inlet area to a smaller width in the outlet area. The structure of the oil guide groove 3 with a gradually decreasing width reduces the resistance of the lubricating oil during flow, which can improve or prevent the oil from stagnating or forming turbulence in the groove, guide and allow the lubricating oil to flow efficiently and smoothly to the bearing chamber 2, and improve the lubrication effect. At the same time, the width change optimizes the structural stress distribution in the area of the oil guide groove 3, disperses local stress concentration points, enhances the local strength of the electric drive housing 1, reduces the risk of deformation and damage, thereby extending the service life of the electric drive housing 1 and improving its reliability.
[0038] In one embodiment of this application, as Figure 3As shown, along the first direction D1, the height difference H1 between the two ends of the first groove segment 31 is less than the height difference H2 between the two ends of the second groove segment 32.
[0039] Specifically, since the inclination of the first groove segment 31 is less than that of the second groove segment 32, the height difference H1 between the two ends of the first groove segment 31 along the first direction D1 is less than the height difference H2 between the two ends of the second groove segment 32, meaning the length of the first groove segment 31 is less than the length of the second groove segment 32. This arrangement makes the depth change of the oil guide groove 3 inlet side, i.e., the first groove segment 31, more gradual, which can work in conjunction with the first rounded corner 323 protruding at the first end 321 to reduce stress concentration in the inlet area. At the same time, the depth change of the second groove segment 32 is more steep, which can cooperate with the second rounded corner 324 recessed at the second end 322 to better disperse the stress in the outlet area. Therefore, the stress distribution at the edge of the oil guide groove 3 is more uniform, avoiding local high stress points, thereby improving the structural strength of the electric drive housing 1, reducing deformation under high load and long-term use, and extending the service life of the electric drive assembly 100.
[0040] Furthermore, the steeper second groove section 32 can increase the flow rate of lubricating oil and improve the smoothness of the oil guide groove 3.
[0041] In one embodiment of this application, as Figure 1 and Figure 4 As shown, the surface of the electric drive housing 1 is also provided with an oil baffle 4, which is connected to the wall of one side of the oil guide groove 3.
[0042] Specifically, the function of the oil baffle 4 is to block the lubricating oil and allow it to flow back to the oil guide groove 3, thereby improving or preventing oil splashing and turbulence. At the same time, it can increase the structural strength of the electric drive housing 1 by increasing the local wall thickness to disperse stress.
[0043] In one embodiment of this application, as Figure 2 As shown, there are at least two oil guide grooves 3, and the at least two oil guide grooves 3 are stacked together along the first direction D1 in a stepped shape.
[0044] Specifically, at least two or more oil guide grooves 3 can be provided along the thickness of the electric drive housing 1 in the first direction D1. These oil guide grooves 3 are stacked and arranged along the first direction D1 (i.e., the direction perpendicular to the surface of the electric drive housing 1) to form a stepped structure. In one specific embodiment, two oil guide grooves 3 can be provided, wherein the first oil guide groove 3 is located at a higher position and is shallower, and the second oil guide groove 3 is located at a lower position and is deeper, and the two are staggered in the vertical direction. In another specific embodiment, three oil guide grooves 3 can also be provided to form two steps, with the depth increasing sequentially. Of course, four, five, etc. can also be provided, depending on the actual situation. This stepped arrangement achieves stress dispersion through gradual depth change, improves or avoids the accumulation of stress concentration points in a single oil guide groove 3, and also improves the smoothness of the oil flow path. By providing at least two oil guide grooves 3 stacked and arranged in a stepped shape along the first direction D1, the stress is dispersed to multiple positions in the vertical direction, which can reduce the stress concentration phenomenon at the edge of the oil guide groove 3, thereby improving the overall strength and deformation resistance of the electric drive housing 1. Finite element analysis has verified that this structure can significantly reduce the stress peak at the edge of the bearing chamber 2, thereby reducing the deformation of the electric drive housing 1 under high load or long-term use and extending the product's service life. Simultaneously, the stepped arrangement enhances the versatility of the oil guide groove 3 structure, enabling it to adapt to the design requirements of different models of electric drive housing 1, improving platform compatibility, and providing technical support for the lightweight and high reliability of the electric drive assembly 100.
[0045] In another aspect, this application also provides a vehicle that includes the electric drive assembly 100 described above. Specifically, since the vehicle includes the electric drive assembly 100 described in the above embodiments, it also has the beneficial effects of the electric drive assembly 100 described above, which will not be repeated here.
[0046] It should be noted that the terms "horizontal" and "vertical" do not imply that the components must be absolutely horizontal or vertical, but rather that they can be slightly tilted. Similarly, the terms "parallel" and "perpendicular" do not imply that the components are absolutely parallel or perpendicular, but rather that they can have a certain angular deviation. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted. In addition, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships that are commonly used when the product of this application is in use. They are only for the purpose of describing the embodiments of this application 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. Therefore, they should not be construed as limitations on this application.
[0047] It is understood that the term "multiple" in this document means at least two, such as two, three, etc., unless otherwise specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.
[0048] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. An electric drive assembly, characterized in that, include: An electric drive housing (1) is provided with a bearing chamber (2) and an oil guide groove (3). Along a first direction, the bearing chamber (2) is recessed relative to the surface of the electric drive housing (1). The oil guide groove (3) includes a first groove segment (31), a step segment (35), and a second groove segment (32) connected in sequence. The end of the first groove segment (31) away from the second groove segment (32) is connected to the surface of the electric drive housing (1). The end of the second groove segment (32) away from the first groove segment (31) is connected to the bearing chamber (2). The second groove segment (32) is located on the side of the first groove segment (31) near the center of the bearing chamber (2). The first direction is perpendicular to the plane direction of the surface of the electric drive housing (1).
2. The electric drive assembly according to claim 1, characterized in that, The extension direction of the stage (35) is parallel to the first direction. On the side away from the electric drive housing (1), the bottom wall of the second slot section (32) and the bottom wall of the stage (35) have a first inclination angle between 90 degrees and 180 degrees. The second groove segment (32) includes a first end (321) and a second end (322) opposite to each other. The first end (321) is provided with a first rounded corner (323) protruding towards the bearing chamber (2). The first end (321) is connected to the stage segment (35) through the first rounded corner (323). The second end (322) is connected to the bearing chamber (2).
3. The electric drive assembly according to claim 2, characterized in that, The oil guide groove (3) also includes a third groove section (33), which is connected to the bearing chamber (2); The second end (322) is provided with a second rounded corner (324) that is recessed away from the bearing chamber (2), and the second end (322) is connected to the third groove segment (33) through the second rounded corner (324).
4. The electric drive assembly according to claim 3, characterized in that, On the side facing the electric drive housing (1), the bottom wall of the first slot section (31) has a second inclination angle between the bottom wall of the stage section (35) and the bottom wall of the stage section (35), the second inclination angle being between 90 degrees and 180 degrees, and the second inclination angle being smaller than the first inclination angle.
5. The electric drive assembly according to claim 4, characterized in that, The oil guide groove (3) further includes a fourth groove section (34), the extension direction of which is perpendicular to the first direction; The fourth slot segment (34) includes a third end (341) and a fourth end (342) opposite to each other. The third end (341) is connected to the surface of the electric drive housing (1), and the fourth end (342) is connected to the first slot segment (31). On the side facing the electric drive housing (1), the bottom wall of the fourth end (342) has a third inclination angle with the bottom wall of the first slot segment (31).
6. The electric drive assembly according to claim 5, characterized in that, The width of the oil guide groove (3) gradually decreases from the fourth groove segment (34) to the third groove segment (33).
7. The electric drive assembly according to claim 4, characterized in that, Along the first direction, the height difference between the two ends of the first groove segment (31) is less than the height difference between the two ends of the second groove segment (32).
8. The electric drive assembly according to any one of claims 1-7, characterized in that, The surface of the electric drive housing (1) is also provided with an oil baffle (4), which is connected to the wall of one side of the oil guide groove (3).
9. The electric drive assembly according to claim 8, characterized in that, The number of oil guide grooves (3) is at least two, and the at least two oil guide grooves (3) are stacked together along the first direction in a stepped shape.
10. A vehicle, characterized in that, include: The electric drive assembly according to any one of claims 1-9.