Drive axle assembly and vehicle with same

Abstract

The invention provides a drive axle assembly and a vehicle with the same. The drive axle assembly comprises a drive axle shell, the drive axle shell is provided with a mounting cavity, a via hole structure is arranged on the cavity wall of the mounting cavity, and a driven gear left bearing of the differential mechanism assembly is arranged in the mounting cavity. The integrated plate structure is arranged in the mounting cavity and connected with the drive axle shell, an oil collecting groove and a differential lubricating oil channel are defined between the integrated plate structure and the drive axle shell, and the oil collecting groove and the differential lubricating oil channel are located at the top of the mounting cavity; a main tooth lubricating oil channel and an exhaust channel are formed in the side wall of the drive axle shell, the first end of the main tooth lubricating oil channel communicates with the oil collecting groove, the second end of the main tooth lubricating oil channel extends and communicates with the via hole structure, the first end of the exhaust channel communicates with the oil collecting groove, the second end of the exhaust channel extends away from the oil collecting groove, and a ventilation plug is arranged at the end of the second end of the exhaust channel. The differential lubricating oil channel is used for spraying lubricating oil to the side where the driven gear left bearing is located.

Description

Technical Field

[0001] This invention relates to the field of vehicle transmission system technology, and more specifically, to a drive axle assembly and a vehicle having the same. Background Technology

[0002] In existing drive axle technology, splash lubrication is widely used as the mainstream lubrication method. It utilizes gear rotation to drive lubricating oil, thereby providing lubrication to various points. However, under different vehicle operating conditions, such as starting, low-speed driving, steep slopes, or side tilting, the gear speed is relatively low, resulting in insufficient oil splashing force. This makes it difficult to effectively deliver lubricating oil to critical components such as the driving bevel gear, driven bevel gear, and bearings, leading to decreased lubrication efficiency and consequently affecting gear life and the overall performance of the drive axle. Furthermore, traditional lubrication systems are not designed with a continuous lubricating oil supply in mind. Especially when gear speeds fluctuate significantly, there is a risk of lubricating oil supply interruption, further exacerbating the lubrication problem.

[0003] No effective solution has yet been proposed for the above problems. Summary of the Invention

[0004] The main objective of this invention is to provide a drive axle assembly and a vehicle having the same, in order to solve the problems of poor lubrication and complex ventilation structure of the drive axle under certain operating conditions in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a drive axle assembly is provided, comprising: a drive axle housing having a mounting cavity, a through-hole structure for an output shaft to pass through the cavity wall of the mounting cavity, a main gear internal bearing and a main gear external bearing disposed opposite to each other within the through-hole structure, and a differential assembly driven gear left bearing disposed within the mounting cavity; an integrated plate structure disposed within the mounting cavity and connected to the drive axle housing, wherein an oil collection groove and a differential lubrication groove are formed between the integrated plate structure and the drive axle housing. The lubricating oil passage, oil collection groove, and differential lubricating oil passage are located at the top of the mounting cavity. The main gear lubricating oil passage and exhaust passage are provided on the side wall of the drive axle housing. The first end of the main gear lubricating oil passage is connected to the oil collection groove, and the second end of the main gear lubricating oil passage extends between the inner bearing and the outer bearing of the main gear and is connected to the through hole structure. The first end of the exhaust passage is connected to the oil collection groove, and the second end of the exhaust passage extends away from the oil collection groove. A vent plug is provided at the end of the second end of the exhaust passage. The differential lubricating oil passage is used to spray lubricating oil onto the side where the left bearing of the driven gear is located.

[0006] Furthermore, the exhaust passage includes a labyrinth oil return passage. The integrated plate structure and the inner wall of the drive axle housing form a labyrinth oil return passage. The inlet end of the labyrinth oil return passage is connected to the oil collection groove, and the outlet end of the labyrinth oil return passage is provided with a vent plug. The bottom of the labyrinth oil return passage near the differential lubrication oil passage is provided with an oil return port.

[0007] Furthermore, the exhaust passage also includes a straight exhaust passage. The first end of the straight exhaust passage is connected to the outlet end of the labyrinth oil return passage, and the second end of the straight exhaust passage extends vertically upward. A vent plug is provided at the second end of the straight exhaust passage.

[0008] Furthermore, the integrated plate structure includes: a plate body, which is an arc-shaped structure. The plate body extends along the side wall of the mounting cavity, with the first end of the plate body located at the top of the mounting cavity. An oil collection groove is formed between the first end of the plate body and the side wall of the drive axle housing, and a labyrinth oil return channel is formed on the side of the plate body closest to the oil collection groove.

[0009] Furthermore, the straight-section exhaust port is located on the drive axle housing.

[0010] Further, the plate body includes: a first plate segment, the first end of which is adjacent to the inlet end of the main gear lubrication oil passage, the second end of which extends away from the inlet end of the main gear lubrication oil passage, and at least a portion of the first plate segment extends horizontally to form an oil collection groove between the upper surface of the first plate segment and the side wall of the drive axle housing; a second plate segment, the first end of which is connected to the second end of the first plate segment, the second end of which extends downward circumferentially along the drive axle housing, and at least a portion of the upper surface of the second plate segment is lower than the height of the upper surface of the second end of the first plate segment, wherein the inlet end of the differential lubrication oil passage is opened at the connection between the second end of the first plate segment and the first end of the second plate segment, and the differential lubrication oil passage extends vertically, and the bottom of the second plate segment is provided with an oil return port.

[0011] Furthermore, the second plate segment is provided with a first rib and a second rib. The first rib protrudes vertically on the upper surface of the second plate segment, and the end of the first rib facing the inner side of the drive axle housing is positioned at a distance from the edge of the second plate segment to form the inlet end of the labyrinth oil return channel. The first end of the second rib is connected to the end of the first rib facing the inner side of the drive axle housing, and the second end of the second rib extends away from the first rib, so that a first oil return passage is formed between the side of the second rib facing the inner side of the drive axle housing and the edge of the second plate segment, and a second oil return passage is formed between the side of the second rib facing the outer side of the drive axle housing and the edge of the second plate segment. The first oil return passage and the second oil return passage are connected, and the flow directions of the first oil return passage and the second oil return passage are arranged in opposite directions.

[0012] Furthermore, the height of the second oil return passage is lower than that of the first oil return passage, the oil return port is opened on the second oil return passage, and the first end of the straight exhaust passage is connected to the first oil return passage.

[0013] Furthermore, the plate body includes: a third plate segment, the first end of the third plate segment being connected to the second end of the second plate segment, the second end of the third plate segment extending circumferentially along the drive axle housing to the bottom of the mounting cavity, and a snap-fit ​​groove being provided on the side of the third plate segment facing the bottom of the mounting cavity for mounting magnets.

[0014] According to one aspect of the present invention, a vehicle is provided, including a drive axle assembly, the drive axle assembly being the drive axle assembly described above.

[0015] By applying the technical solution of this invention, an integrated plate structure is tightly fitted with the drive axle housing to jointly form the top oil collection groove and differential lubrication passage, ensuring effective storage and precise distribution of lubricating oil under various operating conditions. Furthermore, the integrated plate structure works in conjunction with the main gear lubrication passage and exhaust passage of the drive axle housing to achieve active lubrication and stable ventilation. Lubricating oil is sprayed from the oil collection groove through the main gear lubrication passage to the inner and outer bearings of the main gear. Simultaneously, lubrication is provided to the left bearing of the driven gear through the differential lubrication passage. The exhaust passage is connected to the oil collection groove, and a vent plug at the end ensures pressure balance inside and outside the drive axle cavity. Through the integrated design of the oil collection groove and lubrication passage, the active spray lubrication method solves the shortcomings of traditional splash lubrication under conditions such as starting, low speed, and side tilting, ensuring that bearings and gears receive sufficient lubrication under all circumstances, thus extending the service life of the drive axle. The integrated exhaust channel, combined with the vent plug in the drive axle housing, not only simplifies the structure of the ventilation system and reduces interference with other chassis components, but also effectively prevents oil leakage and blockage, maintaining stable operation of the drive axle. This application solves the problems of poor lubrication of the drive axle under certain operating conditions and the complexity of the ventilation structure in the prior art. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of a first embodiment of the drive axle assembly according to the present invention is shown;

[0018] Figure 2 A schematic diagram of a second embodiment of the drive axle assembly according to the present invention is shown;

[0019] Figure 3 A schematic diagram of a third embodiment of the drive axle assembly according to the present invention is shown;

[0020] Figure 4 A schematic diagram of a fourth embodiment of the drive axle assembly according to the present invention is shown;

[0021] Figure 5 A schematic diagram of a fifth embodiment of the drive axle assembly according to the present invention is shown;

[0022] Figure 6 A schematic diagram of a sixth embodiment of the drive axle assembly according to the present invention is shown;

[0023] Figure 7 A structural schematic diagram of a seventh embodiment of the drive axle assembly according to the present invention is shown.

[0024] The above figures include the following reference numerals:

[0025] 5. Main gear internal bearing; 6. Main gear external bearing; 7. Driven gear left bearing;

[0026] 9. Drive axle housing;

[0027] 11. Integrated plate structure; 110. Plate body; 112. First plate segment; 113. Second plate segment; 1131. First rib; 1132. Second rib; 114. First oil return passage; 115. Second oil return passage; 116. Third plate segment;

[0028] 12. Transmission side oil seal;

[0029] 13. Drive axle side oil seal;

[0030] 14. Output gear;

[0031] 16. Oil collection groove; 17. Main gear lubrication oil passage; 18. Differential lubrication oil passage; 20. Differential side oil seal;

[0032] 23. Snap-on slot;

[0033] 900, Exhaust passage; 901, Labyrinth oil return passage; 902, Oil return port; 903, Straight-section exhaust passage. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0038] Currently, the drive axle ventilation method involves connecting an external ventilation pipe to the drive axle. This method is complex and requires careful planning of the pipe routing within the complex space of the chassis. It is prone to positional interference with components such as the suspension, drive shaft, and exhaust pipe. Furthermore, the ventilation pipe is constantly exposed under the chassis, making it susceptible to wear and tear from flying stones and mud, or loosening and detachment of the joints due to vehicle bumps and vibrations, increasing the possibility of failure. A relevant example is as follows: A drive axle ventilation structure is proposed, including a steel pipe I, a transition rubber hose, a bent steel pipe II with a fixed bracket, and a long rubber hose, which are connected sequentially. The steel pipe I passes through the interior of the drive axle housing. The steel pipe I and the bent steel pipe II are interference-fitted with the transition rubber hose. The fixed bracket is provided with bolt holes, and the bent steel pipe II is fixed to the axle housing by fixing bolts. The end of the long rubber hose is fixed to the vehicle body or frame.

[0039] Combination Figures 1 to 7As shown, according to a specific embodiment of this application, a drive axle assembly is provided.

[0040] like Figure 1 As shown, the drive axle assembly includes: a drive axle housing 9, which has a mounting cavity. The cavity wall of the mounting cavity has a through-hole structure for the output shaft to pass through. A main gear inner bearing 5 and a main gear outer bearing 6 are disposed opposite to each other within the through-hole structure. A left-hand bearing 7 of the differential assembly is disposed within the mounting cavity. An integrated plate structure 11 is disposed within the mounting cavity and connected to the drive axle housing 9. An oil collection groove 16 and a differential lubrication oil passage 18 are formed between the integrated plate structure 11 and the drive axle housing 9. Located at the top of the mounting cavity, the drive axle housing 9 has a main gear lubrication oil passage 17 and an exhaust passage 900 on its side wall. The first end of the main gear lubrication oil passage 17 is connected to the oil collection groove 16, and the second end of the main gear lubrication oil passage 17 extends between the main gear inner bearing 5 and the main gear outer bearing 6 and is connected to the through hole structure. The first end of the exhaust passage 900 is connected to the oil collection groove 16, and the second end of the exhaust passage 900 extends away from the oil collection groove 16. A vent plug is provided at the end of the second end of the exhaust passage 900. The differential lubrication oil passage 18 is used to spray lubricating oil onto the side where the driven gear left bearing 7 is located.

[0041] By applying the technical solution of this invention, the integrated plate structure 11 is tightly fitted with the drive axle housing 9 to jointly form the top oil collection groove 16 and the differential lubrication oil passage 18, ensuring effective storage and precise distribution of lubricating oil under various operating conditions. Furthermore, the integrated plate structure also works in conjunction with the main gear lubrication oil passage 17 and the exhaust passage 900 of the drive axle housing to achieve active lubrication and stable ventilation. Lubricating oil is sprayed from the oil collection groove 16 to the main gear inner bearing 5 and main gear outer bearing 6 through the main gear lubrication oil passage 17. Simultaneously, lubrication is provided to the left driven gear bearing 7 through the differential lubrication oil passage 18. The exhaust passage 900 is connected to the oil collection groove 16, and the vent plug at the end ensures pressure balance inside and outside the drive axle cavity. Through the integrated design of the oil collection groove and lubrication oil passage, the active spray lubrication method solves the shortcomings of traditional splash lubrication under conditions such as starting, low speed, and side tilting, ensuring that bearings and gears receive sufficient lubrication under any circumstances, thus extending the service life of the drive axle. The integrated exhaust channel, combined with the vent plug in the drive axle housing, not only simplifies the structure of the ventilation system and reduces interference with other chassis components, but also effectively prevents oil leakage and blockage, maintaining stable operation of the drive axle. This application solves the problems of poor lubrication of the drive axle under certain operating conditions and the complexity of the ventilation structure in the prior art.

[0042] Specifically, such as Figure 2 , Figure 5As shown, the exhaust passage 900 includes a labyrinth oil return passage 901. The integrated plate structure 11 and the inner wall of the drive axle housing 9 form a labyrinth oil return passage 901. The inlet end of the labyrinth oil return passage 901 is connected to the oil collection groove 16, and the outlet end of the labyrinth oil return passage 901 is provided with a vent plug. An oil return port 902 is provided at the bottom of the labyrinth oil return passage 901 near the differential lubrication oil passage 18. This structural design allows the high-pressure gas generated inside the drive axle during operation to flow through the complex path of the labyrinth oil return passage 901. During this process, the oil mist carried by the gas condenses into oil droplets due to the multiple turns and decelerations of the passage, and flows back to the drive axle through the oil return port 902, achieving oil-gas separation.

[0043] The inlet of the labyrinth oil return channel 901 is directly connected to the oil collection tank 16. This means that during the operation of the drive axle, the mixed oil mist generated by oil splashing due to gear rotation and air pressure changes can enter the labyrinth oil return channel 901 immediately. The oil collection tank 16, as the starting point for oil collection, provides an ample supply for subsequent lubricant distribution and oil mist treatment.

[0044] The structure of the labyrinthine oil return channel 901 is meticulously designed, incorporating multiple turning points and narrow sections. This design forces the airflow entering the channel to slow down, thereby reducing its ability to carry oil mist. As the airflow moves through the channel, the oil mist particles, due to inertia, cannot accelerate with the airflow; instead, they collide with the channel walls at the corners, eventually coalescing into larger oil droplets.

[0045] The labyrinthine oil return channel 901 has an oil return port 902 located at its bottom near the differential lubrication oil passage 18. This design takes into account the natural flow direction and physical properties of the oil, namely, that oil tends to flow downwards under the influence of gravity. By placing the oil return port 902 at a lower position, oil droplets can smoothly slide down the channel wall and eventually return to the drive axle through the oil return port 902 to participate in the circulating lubrication. At the same time, this position also prevents the oil from directly returning to the vicinity of the high-speed rotating gears, preventing re-agitation and the formation of oil mist, thus reducing oil loss.

[0046] The structural design of the labyrinthine oil return channel 901 also considers ease of maintenance and system durability. The complex channel design increases structural stability and reduces the likelihood of damage caused by external impacts and vibrations. Simultaneously, because lubricating oil can be effectively recovered through the return port 902, the frequency of cleaning the venting structure by maintenance personnel is reduced, lowering maintenance costs. Furthermore, this structural design has relatively low requirements for lubricating oil quality, accommodating different types of lubricating oil and enhancing the system's versatility and adaptability.

[0047] In one specific embodiment, when the drive axle is in operation, high temperature and increased air pressure are generated inside the drive axle due to the high-speed movement of gears and bearings. At this time, oil-containing air enters the labyrinthine oil return channel 901 through the oil collection groove 16. Under the action of multiple bends and narrow sections of the channel, the airflow speed is significantly slowed down, and oil mist particles accumulate on the inner wall of the channel to form oil droplets. These oil droplets are recycled back into the drive axle cavity through the oil return port 902 under the action of gravity, participating in the recirculation process. This not only maintains the stable air pressure inside the drive axle and prevents oil leakage, but also optimizes the utilization rate of oil and reduces unnecessary waste.

[0048] It should be further noted that the oil return port 902 can be set independently from the differential lubrication oil passage 18, or it can be connected to the differential lubrication oil passage 18 and share a common outlet.

[0049] Specifically, such as Figure 4 , Figure 7 As shown, the exhaust passage 900 also includes a straight exhaust passage 903. The first end of the straight exhaust passage 903 is connected to the outlet end of the labyrinth oil return passage 901, and the second end of the straight exhaust passage 903 extends vertically upwards. A vent plug is provided at the second end of the straight exhaust passage 903. This design allows the gas inside the drive axle, after being processed by the labyrinth passage, to rise smoothly along the straight exhaust passage 903 and be discharged to the outside atmosphere through the vent plug. At the same time, it ensures that even during vehicle operation, the oil in the drive axle cavity will not flow back to the outside through the exhaust passage 900, effectively preventing oil leakage and maintaining the sealing performance and operational stability of the drive axle.

[0050] The second end of the straight exhaust duct 903 extends vertically upward. This design makes full use of gravity, so that the trace oil mist that has not condensed into oil droplets after being processed by the labyrinth oil return channel 901 will further condense during the ascent, reducing the possibility of oil mist being discharged into the external environment with the gas and reducing unnecessary oil loss.

[0051] The top of the straight exhaust duct 903 is equipped with a vent plug. This vent plug not only maintains the pressure balance inside and outside the drive axle, preventing deformation or damage to the drive axle housing due to internal high pressure, but also prevents external impurities from entering the drive axle. The vent plug design typically includes oil mist filtration and a breathable membrane to ensure gas flow while preventing external impurities from entering.

[0052] In one specific embodiment, when the drive axle assembly is operating, the internal air pressure of the drive axle increases accordingly due to temperature rise and gas expansion. At this time, excess gas and entrained oil mist enter the labyrinth oil return channel 901 through the oil collection groove 16. After oil mist separation, the remaining gas is discharged upward through the straight exhaust duct 903 and finally connected to the outside atmosphere through the vent plug. The design of the straight exhaust duct 903, especially its vertical extension, utilizes the gravity return of oil and the rising characteristics of airflow, effectively preventing oil from being discharged with the airflow and reducing resource waste. At the same time, the vent plug ensures the stability of the internal air pressure of the drive axle, prevents contamination caused by gas backflow, and improves the stability and reliability of the entire system.

[0053] The vertical design of the straight exhaust manifold 903 reduces the likelihood of oil contamination of the breather plug, thus decreasing the frequency of breather plug maintenance. Since the breather plug is typically located at the top or high of the drive axle, this design also helps prevent impact from splashed stones and mud during vehicle operation, extending the breather plug's lifespan and reducing the failure rate caused by breather plug damage.

[0054] The integration of the straight exhaust manifold 903 with the labyrinthine oil return channel 901 further embodies the integrated design concept of this invention. This integration not only simplifies the internal structure of the drive axle and reduces the number of independent parts, but also effectively controls the volume and weight of the entire ventilation system, which is beneficial for the lightweight design of the drive axle, thus having a positive impact on improving vehicle fuel economy and reducing emissions.

[0055] In summary, the combination of the straight exhaust port 903 and the labyrinth oil return channel 901 not only solves the problem of gas emission inside the drive axle, but also achieves efficient oil recovery and long-term stable operation of the system through physical and structural design optimization.

[0056] Specifically, the integrated plate structure 11 includes: a plate body 110, which is an arc-shaped structure. The plate body 110 extends along the side wall of the mounting cavity. The first end of the plate body 110 is located at the top of the mounting cavity, and an oil collection groove 16 is formed between the first end of the plate body 110 and the side wall of the drive axle housing 9. A labyrinth oil return channel 901 is formed on the side of the plate body 110 near the oil collection groove 16.

[0057] The plate body 110 extends along the side wall of the mounting cavity. This layout makes full use of the space inside the drive axle housing 9, allowing the integrated plate structure 11 to be seamlessly integrated into the existing drive axle structure without occupying valuable space. The extension along the side wall also facilitates the flow of lubricating oil along the surface of the plate body 110, increasing the opportunity for oil to contact the plate body 110, thereby improving the collection and transfer efficiency of lubricating oil.

[0058] The first end of the plate body 110 is located at the top of the mounting cavity, forming an oil collection groove 16 between it and the side wall of the drive axle housing 9. The design of the oil collection groove 16 takes into account the natural flow direction of the oil and the spraying characteristics of the lubricating oil when the gears rotate, ensuring that the lubricating oil can be effectively collected even under special operating conditions such as low speed or side tilt, avoiding poor lubrication caused by insufficient oil. On the side near the oil collection groove 16, a labyrinthine oil return channel 901 is formed on the plate body 110, which is another important technical feature of this invention. The labyrinthine oil return channel 901 is designed to minimize oil loss and prevent oil leakage into the external environment through the vent plug by utilizing the principles of airflow deceleration and oil mist separation.

[0059] By precisely controlling the dimensions and curvature of the arc-shaped plate body 110, and the specific design of the labyrinth oil return channel 901, this invention achieves excellent hydrodynamic performance during drive axle operation. This design can adapt to different working conditions, ensuring sufficient supply and effective recovery of lubricating oil even under extreme conditions, thereby improving the overall performance and durability of the drive axle.

[0060] Specifically, a straight exhaust duct 903 is located on the drive axle housing 9. This design allows high-pressure gas generated inside the drive axle to be quickly discharged through the straight exhaust duct, effectively avoiding potential lubrication system performance degradation caused by gas pressure accumulation. The direct opening of the straight exhaust duct reduces bends in the gas flow path, thereby reducing energy loss during gas discharge and ensuring rapid pressure balance inside the drive axle, which is beneficial for maintaining the normal operation of the drive axle. In addition, this structure simplifies the complexity of the ventilation system, avoids physical damage that traditional ventilation lines may suffer in the complex environment of the chassis, and enhances the stability and durability of the entire system.

[0061] In other embodiments, the position and shape of the straight exhaust duct can be adjusted according to the specific layout and size of the drive axle to adapt to different vehicle platforms and operating conditions, further optimizing the exhaust efficiency of the airflow and the overall design of the system.

[0062] Specifically, the plate body 110 includes: a first plate segment 112, the first end of the first plate segment 112 being adjacent to the inlet end of the main gear lubrication oil passage 17, the second end of the first plate segment 112 extending away from the inlet end of the main gear lubrication oil passage 17, at least a portion of the first plate segment 112 extending horizontally to form an oil collection groove 16 between the upper surface of the first plate segment 112 and the side wall of the drive axle housing 9; a second plate segment 113, the first end of the second plate segment 113 being connected to the second end of the first plate segment 112, the second end of the second plate segment 113 extending downward circumferentially along the drive axle housing 9, at least a portion of the height of the upper surface of the second plate segment 113 being lower than the height of the upper surface of the second end of the first plate segment 112, wherein the inlet end of the differential lubrication oil passage 18 is opened at the connection between the second end of the first plate segment 112 and the first end of the second plate segment 113, and the differential lubrication oil passage 18 extending vertically, and an oil return port 902 is provided at the bottom of the second plate segment 113. This structural design ensures that when the gears rotate, the lubricating oil can be effectively collected in the oil collection groove 16, and then actively sprayed to each key lubrication point through the main gear lubrication oil passage 17 and the differential lubrication oil passage 18, thereby improving the lubrication effect. At the same time, the lubricating oil is recycled through the oil return port 902, which improves the overall efficiency and reliability of the lubrication system.

[0063] The first plate segment 112 is designed to extend horizontally, and its main function is to form the oil collection groove 16 and facilitate the collection and distribution of lubricating oil. The oil collection groove 16 is located between the upper surface of the first plate segment 112 and the side wall of the drive axle housing 9. The key to this design is its horizontal extension, which ensures that the oil can flow smoothly into the oil collection groove 16 when the gear rotates, rather than splashing everywhere or being confined to a local area, thereby improving the lubricating oil collection efficiency. In particular, the arrangement of the first plate segment 112 adjacent to the inlet end of the main gear lubrication channel 17 means that the oil can be directly guided to the lubrication areas required by the main gear inner bearing 5 and the main gear outer bearing 6, achieving precise lubrication through active spraying. This is especially important under complex conditions such as vehicle start-up, low-speed driving, or side tilting, because traditional splash lubrication methods often cannot provide sufficient lubrication under such conditions.

[0064] The second plate segment 113 performs a different task than the first plate segment 112. It extends downwards along the circumference of the drive axle housing 9, forming a unique inclined structure. Compared to the first plate segment 112, the upper surface of the second plate segment 113 is lower. This design cleverly utilizes the principle of gravity, causing the oil to flow naturally downwards along the inclined surface and eventually return to the lubricating oil circulation system inside the drive axle housing 9 through the return port 902. More importantly, the inlet end of the differential lubrication passage 18 is located at the connection between the second end of the first plate segment 112 and the first end of the second plate segment 113, and extends vertically. This design ensures that after the initial collection by the first plate segment 112, the lubricating oil can be directly guided to the differential assembly, including key lubrication points such as the left-hand bearing 7, further improving lubrication efficiency and effectiveness.

[0065] In one specific embodiment, when the drive axle is in operation, the rotation of the gears drives the lubricating oil. A portion of the oil is collected through the oil collection groove 16 formed above the first plate segment 112, and then transported to the main gear inner bearing 5 and the main gear outer bearing 6 via the main gear lubrication passage 17, achieving rapid and effective lubrication. The other portion of the oil, after passing through the first plate segment 112, is precisely guided to the lubrication points of the left gear bearing 7 and the differential assembly via the differential lubrication passage 18 at the connection between the first and second plate segments 113. The oil return port 902 at the bottom of the second plate segment 113 allows unused oil or lubricated oil to flow back into the drive axle housing 9 under gravity, ensuring the recycling and reuse of lubricating oil, avoiding resource waste, and maintaining the cleanliness and oil level inside the drive axle.

[0066] The design of the first plate segment 112 and the second plate segment 113 not only improves the lubrication and ventilation performance of the drive axle, but also greatly simplifies the maintenance process. Since these two plate segments constitute the core of the integrated plate structure, their tight fit with the drive axle housing 9 reduces the need for additional parts. This means that maintenance personnel can easily inspect and clean the lubrication channels without damaging the overall drive axle structure, reducing maintenance costs and time.

[0067] Specifically, such as Figure 5 , Figure 6As shown, the second plate segment 113 is provided with a first rib 1131 and a second rib 1132. The first rib 1131 protrudes vertically on the upper surface of the second plate segment 113, and the end of the first rib 1131 facing the inner side of the drive axle housing 9 is positioned at a distance from the edge of the second plate segment 113 to form the inlet end of the labyrinth oil return channel 901. The first end of the second rib 1132 is connected to the end of the first rib 1131 facing the inner side of the drive axle housing 9, and the second rib 113... The second end of section 2 extends away from the first rib 1131, so that the side of the second rib 1132 facing the inner side of the drive axle housing 9 forms a first oil return passage 114 between it and the edge of the second plate segment 113, and the side of the second rib 1132 facing the outer side of the drive axle housing 9 forms a second oil return passage 115 between it and the edge of the second plate segment 113. The first oil return passage 114 and the second oil return passage 115 are connected, and the flow directions of the first oil return passage 114 and the second oil return passage 115 are arranged in opposite directions. This structural design effectively utilizes the different oil return channels formed by the first rib 1131 and the second rib 1132. By changing the path length and flow direction of the oil, the oil speed is slowed down and oil mist is separated, avoiding the oil leakage problem caused by oil accumulation in traditional ventilation structures.

[0068] On the upper surface of the second plate segment 113, the ingenious arrangement of the first rib 1131 and the second rib 1132 is key to ensuring efficient lubricant recovery and ventilation. The first rib 1131 protrudes vertically and maintains a certain distance from the edge of the second plate segment 113, thus forming the inlet end of the labyrinthine oil return channel 901 between them. The core of this design lies in utilizing the vertical position of the first rib 1131 and its distance from the edge to create an inlet that guides airflow into the labyrinthine oil return channel 901, while also providing initial conditions for oil separation and reflux.

[0069] The first end of the second rib 1132 is connected to the end of the first rib 1131 facing the inner side of the drive axle housing 9. Its function is to further refine the airflow path and enhance the oil mist separation effect. The second end of the second rib 1132 extends away from the first rib 1131, thus forming a first oil return passage 114 between the inner side of the second rib 1132 facing the drive axle housing 9 and the edge of the second plate segment 113; and a second oil return passage 115 between the outer side of the second rib 1132 facing the drive axle housing 9 and the edge of the second plate segment 113. The arrangement of these two oil return passages allows the airflow to be initially decelerated and separated from the oil mist when passing through the first rib 1131. Subsequently, under the action of the second rib 1132, the airflow is further decelerated and guided into the first oil return passage 114 or the second oil return passage 115, realizing secondary separation and recovery of the oil.

[0070] The design of the labyrinthine oil return channel 901 is based on fluid dynamics principles. Through a complex and tortuous channel structure, the airflow undergoes multiple decelerations and direction changes as it passes through. Upon entering the channel, the airflow encounters the obstruction of the first rib 1131 and the second rib 1132, forcing it to slow down. Oil mist particles in the airflow gradually separate from the airflow due to inertia and gravity, adhering to the channel wall and eventually flowing to the oil return port 902, where they are reintroduced into the lubricating oil circulation. The flow directions of the first oil return passage 114 and the second oil return passage 115 are set in opposite directions. This design further enhances the separation effect between the oil and airflow, as the opposing airflow generates a stronger collision when it encounters the oil, accelerating oil condensation and recirculation. Through the structural design of the first rib 1131 and the second rib 1132, and the complex path of the labyrinthine oil return channel 901, the lubricating oil inside the drive axle can be almost completely recovered, avoiding oil waste, maintaining the cleanliness of the drive axle's interior, and extending the drive axle's service life.

[0071] While the lubricating oil is effectively separated and recovered, the treated gas can be discharged through the straight exhaust port 903, maintaining the balance between the internal and external atmospheric pressure of the drive axle and preventing the risk of deformation or damage to the drive axle housing 9 due to gas expansion.

[0072] The heights of the first rib 1131 and the second rib 1132, as well as their distances from the edge of the second plate segment 113, have been precisely calculated and experimentally verified to ensure optimal separation of airflow and oil. Rib heights that are too high or too low, or inappropriate distance configurations, may affect the efficiency of the labyrinth oil return channel 901.

[0073] The first oil return passage 114 and the second oil return passage 115 are designed with opposite flow directions. This design utilizes the characteristics of reverse airflow to further improve the efficiency and reliability of oil recovery. At the same time, it also avoids the possibility of the oil being agitated again and forming oil mist during the return process.

[0074] Specifically, the height of the second oil return passage 115 is lower than the height of the first oil return passage 114. The oil return port 902 is located on the second oil return passage 115, and the first end of the straight exhaust passage 903 is connected to the first oil return passage 114. The lower height of the second oil return passage 115 means that the oil flows more easily along the second oil return passage 115 under gravity until it returns to the drive axle housing 9 through the oil return port 902 and participates in recirculation. This design ensures that even tiny oil droplets can be effectively recovered, preventing oil loss during ventilation and improving the overall utilization efficiency of the lubricating oil.

[0075] The first end of the straight exhaust duct 903 is connected to the first oil return passage 114, which is at a relatively high height. This layout ensures that most of the oil mist and droplets naturally sink along the second oil return passage 115 under gravity and are captured and recovered by the oil return port 902. The remaining small amount of uncaptured oil mist is more easily separated when passing through the first oil return passage 114 due to its higher position. Finally, the pure gas enters the straight exhaust duct 903 through the first oil return passage 114 and is discharged into the atmosphere through the vent plug, thereby maintaining the balance of air pressure inside and outside the drive axle housing 9 and avoiding structural deformation or damage caused by internal high pressure.

[0076] Specifically, the plate body 110 includes: a third plate segment 116, the first end of the third plate segment 116 is connected to the second end of the second plate segment 113, the second end of the third plate segment 116 extends circumferentially along the drive axle housing 9 to the bottom of the mounting cavity, and a snap-fit ​​groove 23 is provided on the side of the third plate segment 116 facing the bottom of the mounting cavity, the snap-fit ​​groove 23 is used to install magnets.

[0077] The third plate segment 116 has a snap-fit ​​groove 23 on the side facing the bottom of the mounting cavity for fixing and installing magnets. The design of the snap-fit ​​groove 23 ensures that the magnet can be firmly placed in the designated position, avoiding displacement or falling off of the magnet due to vibration during vehicle operation. This is crucial for maintaining the effective adsorption capacity of the magnet and the working stability of the entire system.

[0078] By placing a magnet within the locking groove 23, this invention can actively attract metal particles, such as iron filings generated by wear, from the lubricating oil inside the drive axle. If these impurities are not removed, they will directly affect the lifespan of various components and the overall performance of the drive axle. The magnet's attraction not only extends the service life of the lubricating oil but also reduces wear on critical components such as gears and bearings, improving the reliability and maintenance cycle of the drive axle.

[0079] In one specific embodiment, when the drive axle operates under various conditions, metallic impurities in the lubricating oil are carried up by the high-speed rotating gears and other components. However, due to the presence of the magnet in the locking groove 23 on the third plate segment 116, these metallic impurities are effectively attracted as they flow near the magnet. The strong magnetic field of the magnet can attract and capture fine metal particles, keeping the lubricating oil clean, extending the oil change interval, reducing abnormal wear between components, and improving transmission efficiency. The connection between the third plate segment 116 and the second plate segment 113, and its design extending circumferentially along the drive axle housing 9 to the bottom of the mounting cavity, demonstrate the present invention's efforts in improving system integration and optimizing space utilization. This ingenious layout allows the magnet adsorption system to be seamlessly integrated into the drive axle assembly without occupying valuable interior space, while also simplifying the installation and maintenance process.

[0080] The design of the snap-fit ​​slot 23 is not only for fixing the magnet, but also for protecting it. By embedding the magnet into the snap-fit ​​slot 23, the magnet is effectively protected, avoiding direct contact with the oil inside the drive axle and the high-speed rotating gears, reducing the risk of wear and damage to the magnet, and ensuring its long-term stable working performance.

[0081] It should be further explained that the drive axle assembly also includes a reducer assembly, which comprises a drive bevel gear assembly and a differential assembly. The drive bevel gear assembly meshes with the differential assembly. The drive bevel gear assembly includes a first bearing area, and the differential assembly includes a second bearing area. The connection between the drive bevel gear assembly and the differential assembly has a gear meshing area. An oil reservoir is located on one side of the reducer assembly. An oil pump assembly includes an oil pump and oil pipes. One end of the oil pipes connects to the oil reservoir, and the other end connects to the housing of the reducer assembly. The oil pump is used to deliver oil from the oil reservoir to the first bearing area, the second bearing area, and the gear meshing area via the oil pipes. This arrangement achieves point-to-point lubrication, eliminating the need for oil agitation in the gear meshing area, thus improving drive axle efficiency and reducing efficiency losses during gear lubrication.

[0082] Optionally, a differential-side oil seal 20 is provided at the left-hand bearing 7 of the differential assembly. Through the oil collection groove 16 on the second plate section 113 and the differential lubrication passage 18, lubricating oil is actively sprayed to the lubrication points of the left-hand bearing 7 and the differential assembly. The differential-side oil seal 20 is responsible for locking this lubricating oil to prevent leakage. This not only saves lubricating oil and avoids resource waste, but also maintains the oil pressure balance inside the drive axle housing 9, while preventing the intrusion of external impurities. This close cooperation ensures precise delivery and efficient utilization of lubricating oil, providing a solid foundation for the stable operation of the drive axle under different working conditions. The lubricating oil stored in the oil collection tank 16 will also be actively sprayed to the left bearing 7 of the driven gear through the differential lubrication oil passage 18. Through the oil pumping principle of the tapered bearing, the oil is pumped from the small end to the large end, and the lubricating oil is actively sprayed to the differential side oil seal 20. Through the active spraying method, the lubrication needs of the left bearing 7 of the driven gear and the differential side oil seal 20 under different working conditions are met.

[0083] Optionally, the drive axle assembly also includes a transmission-side oil seal 12 and a drive axle-side oil seal 13. The transmission-side oil seal 12 is installed on the shaft end where the transmission meets the drive axle housing 9. It typically includes a sealing lip that is in close contact with the shaft, a spring-loaded element to maintain pressure between the sealing lip and the shaft surface, and a metal skeleton for support, ensuring the stability and durability of the entire oil seal structure. The main function of the transmission-side oil seal 12 is to prevent the lubricating oil inside the transmission from leaking to the outside of the drive axle, while also preventing external contaminants such as dust and moisture from entering the transmission.

[0084] The drive axle-side oil seal 13 has a similar structure to the transmission-side oil seal 12, also being a sealing assembly made of oil-resistant rubber or PTFE material. It includes a sealing lip that fits tightly against the shaft surface, a spring or elastic material to maintain contact pressure, and a metal skeleton supporting the entire oil seal structure. Unlike the transmission-side oil seal 12, the drive axle-side oil seal 13 focuses more on matching the lubricating oil circulation system inside the drive axle, ensuring that lubricating oil does not leak from the gap between the drive axle housing 9 and the output shaft or other related components. In this embodiment, the lubricating oil stored in the oil collection tank 16 is actively sprayed through the main gear lubrication channel 17 between the main gear inner bearing 5 and the main gear outer bearing 6. Using the pumping principle of the tapered bearing, oil is pumped from the small end to the large end, actively spraying the lubricating oil to the drive axle-side oil seal 13. This active spraying method meets the lubrication needs of the main gear inner bearing 5, the main gear outer bearing 6, and the drive axle-side oil seal 13 under different operating conditions.

[0085] In this embodiment, an output gear 14 is provided at the end of the output shaft away from the mounting cavity. The transmission-side oil seal 12 and the drive axle-side oil seal 13 are located between the output gear 14 and the main gear outer bearing. That is, the transmission-side oil seal 12 and the drive axle-side oil seal 13 are located at the interface between the drive axle and the transmission and inside the drive axle, respectively, and together they form a sealing barrier for the drive axle lubrication system and the ventilation system. The transmission-side oil seal 12 and the drive axle-side oil seal 13 are arranged opposite to each other.

[0086] According to one aspect of the present invention, a vehicle is provided, including a drive axle assembly, the drive axle assembly being the drive axle assembly described above.

[0087] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0088] (1) The drive axle assembly of this patent adopts an integrated lubrication and ventilation structure inside the drive axle cavity. By integrating with the housing, only one integrated plate structure is needed to complete the functions of lubrication, ventilation and magnet fixing in the drive axle system. No additional structures are required, and the construction is simple and the functions are easy to implement.

[0089] (2) The lubricating oil stored in the oil collection tank can be actively sprayed to the driving bevel gear, driven bevel gear, and bearings through the lubrication oil passage, which fully meets the lubrication needs of the drive axle under extreme and tilting conditions, improves gear life, and solves problems such as poor lubrication. In addition, the oil collection tank is designed with a reasonable volume to ensure that a sufficient amount of lubricating oil can be retained even when the gear speed fluctuates, avoiding the risk of supply interruption.

[0090] (3) The lubrication structure is integrated with the drive axle housing to form the drive axle exhaust channel. No additional vent pipe or other accessories are required. The structure is simple. The venting function can be achieved by simply processing the lubrication structure in the housing. The exhaust channel is set as a labyrinth oil return channel to prevent the vent plug from leaking oil. After the high-pressure air carries the oil mist into the labyrinth channel.

[0091] (4) The ventilation module and lubrication module in the drive axle assembly are cleverly integrated. The ventilation channel and lubrication channel are independent of each other but share the same housing space. The inlet end of the exhaust channel is set in the lean oil area next to the oil collection tank, which can effectively prevent lubricating oil from entering the ventilation system and causing blockage. At the same time, the straight exhaust channel can discharge the expansion gas generated by the temperature rise during the operation of the drive axle in a timely manner, and maintain the pressure balance inside and outside the cavity.

[0092] (5) The lubrication and ventilation integrated structure can be integrated with the housing to form a magnetic snap-fit ​​groove inside the drive axle. It is easy to install, can withstand high frequency vibration and oil impact, and will not have displacement or falling off problems.

[0093] (6) The system makes full use of integrated design, adopts an integrated structure of lubrication and ventilation and integrates with the shell, and has ventilation function, lubrication function and magnetic baffle function. It solves the problem of poor lubrication under extreme conditions of splash lubrication, improves the problems of complex ventilation structure and easy displacement of magnets, and adapts to the lightweight and compact design of the whole vehicle without affecting the volume of the drive axle.

[0094] (7) The drive axle adopts back-to-back oil seals. The drive axle side oil seal can seal the drive axle lubricating oil in the drive axle cavity, and the transmission side oil seal can seal the transmission lubricating oil in the transmission cavity, realizing separate lubrication and maximizing the efficiency requirements of the drive axle and transmission.

[0095] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0096] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0097] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0098] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A drive axle assembly, characterized in that, include: The drive axle housing (9) has a mounting cavity. The cavity wall of the mounting cavity is provided with a through hole structure for the output shaft to pass through. The through hole structure is provided with a main gear inner bearing (5) and a main gear outer bearing (6) arranged opposite to each other. The mounting cavity is provided with a differential assembly left driven bearing (7). An integrated plate structure (11) is disposed within the mounting cavity and connected to the drive axle housing (9). An oil collection groove (16) and a differential lubrication passage (18) are formed between the integrated plate structure (11) and the drive axle housing (9). The oil collection groove (16) and the differential lubrication passage (18) are located at the top of the mounting cavity. A main gear lubrication passage (17) and an exhaust passage (900) are provided on the side wall of the drive axle housing (9). The main gear lubrication passage (17)... The first end of the main gear lubrication channel (17) is connected to the oil collection groove (16), and the second end of the main gear lubrication channel (17) extends between the main gear inner bearing (5) and the main gear outer bearing (6) and is connected to the through hole structure. The first end of the exhaust channel (900) is connected to the oil collection groove (16), and the second end of the exhaust channel (900) extends away from the oil collection groove (16). A vent plug is provided at the end of the second end of the exhaust channel (900). The differential lubrication channel (18) is used to spray lubricating oil onto the side where the driven gear left bearing (7) is located.

2. The drive axle assembly according to claim 1, characterized in that, The exhaust passage (900) includes a labyrinth oil return passage (901). The integrated plate structure (11) and the inner wall of the drive axle housing (9) form the labyrinth oil return passage (901). The inlet end of the labyrinth oil return passage (901) is connected to the oil collection groove (16). The outlet end of the labyrinth oil return passage (901) is provided with the vent plug. The bottom of the labyrinth oil return passage (901) near the differential lubrication oil passage (18) is provided with an oil return port (902).

3. The drive axle assembly according to claim 2, characterized in that, The exhaust passage (900) also includes a straight exhaust passage (903), the first end of which is connected to the outlet end of the labyrinth oil return passage (901), the second end of which extends upward in a vertical direction, and the second end of which is provided with the vent plug.

4. The drive axle assembly according to claim 3, characterized in that, The integrated plate structure (11) includes: The plate body (110) has an arc-shaped structure. The plate body (110) extends along the side wall of the mounting cavity. The first end of the plate body (110) is located at the top of the mounting cavity. The first end of the plate body (110) and the side wall of the drive axle housing (9) form the oil collection groove (16). The labyrinth oil return channel (901) is formed on the side of the plate body (110) near the oil collection groove (16).

5. The drive axle assembly according to claim 4, characterized in that, The straight exhaust passage (903) is located on the drive axle housing (9).

6. The drive axle assembly according to claim 4, characterized in that, The plate body (110) includes: The first plate segment (112) is disposed adjacent to the inlet end of the main gear lubrication oil passage (17) at its first end and the second end of the first plate segment (112) extends away from the inlet end of the main gear lubrication oil passage (17). At least a portion of the first plate segment (112) extends horizontally so that the oil collection groove (16) is formed between the upper surface of the first plate segment (112) and the side wall of the drive axle housing (9). The second plate segment (113) has its first end connected to the second end of the first plate segment (112). The second end of the second plate segment (113) extends downward circumferentially along the drive axle housing (9). The height of the upper surface of at least part of the second plate segment (113) is lower than the height of the upper surface of the second end of the first plate segment (112). The inlet end of the differential lubrication passage (18) is opened at the connection between the second end of the first plate segment (112) and the first end of the second plate segment (113). The differential lubrication passage (18) extends vertically. The return port (902) is provided at the bottom of the second plate segment (113).

7. The drive axle assembly according to claim 6, characterized in that, The second plate segment (113) is provided with a first rib (1131) and a second rib (1132). The first rib (1131) protrudes vertically on the upper surface of the second plate segment (113), and the end of the first rib (1131) facing the inside of the drive axle housing (9) is positioned at a distance from the edge of the second plate segment (113) to form the inlet end of the labyrinth oil return channel (901). The first end of the second rib (1132) is connected to the end of the first rib (1131) facing the inside of the drive axle housing (9), and the second rib (1132)... The second end extends away from the first rib (1131) so that the side of the second rib (1132) facing the inside of the drive axle housing (9) forms a first oil return passage (114) between it and the edge of the second plate segment (113). The side of the second rib (1132) facing the outside of the drive axle housing (9) forms a second oil return passage (115) between it and the edge of the second plate segment (113). The first oil return passage (114) and the second oil return passage (115) are connected, and the flow directions of the first oil return passage (114) and the second oil return passage (115) are arranged in opposite directions.

8. The drive axle assembly according to claim 7, characterized in that, The height of the second oil return passage (115) is lower than the height of the first oil return passage (114). The oil return port (902) is opened on the second oil return passage (115). The first end of the straight exhaust passage (903) is connected to the first oil return passage (114).

9. The drive axle assembly according to claim 6, characterized in that, The plate body (110) includes: The third plate segment (116) has its first end connected to the second end of the second plate segment (113). The second end of the third plate segment (116) extends circumferentially along the drive axle housing (9) to the bottom of the mounting cavity. A snap-fit ​​groove (23) is provided on the side of the third plate segment (116) facing the bottom of the mounting cavity. The snap-fit ​​groove (23) is used to install magnets.

10. A vehicle comprising a drive axle assembly, characterized in that, The drive axle assembly is the drive axle assembly according to any one of claims 1 to 9.

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