Drive axle lubrication system and vehicle having same

Abstract

The application provides a driving axle lubricating system and a vehicle with the same, which comprises a shell, a containing cavity is formed in the shell, a bottom of the containing cavity forms a storage liquid space for storing lubricating liquid, a driving gear of the driving axle and a driven gear of the driving axle are located in the containing cavity, an oil collecting frame is arranged between the driven gear and the shell, a top of the oil collecting frame is provided with an oil collecting box, the lubricating liquid in the storage liquid space is splashed into the oil collecting box when the driven gear rotates, a first oil inlet channel is arranged in the shell, an inlet end of the first oil inlet channel is communicated with the oil collecting box, an outlet end of the first oil inlet channel extends to a supporting bearing of the driving gear, a second oil inlet channel is arranged on the oil collecting frame, an inlet end of the second oil inlet channel is communicated with the oil collecting box, and an outlet end of the second oil inlet channel extends to a supporting bearing of the driven gear. The technical scheme of the application solves the problem that the lubricating cost and the lubricating quality of the driving axle in the prior art cannot be considered simultaneously.

Description

Technical Field

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

[0002] There are two main lubrication methods for transmission systems: splash lubrication and active lubrication. Active lubrication systems offer controllable lubrication location and flow, enabling precise lubrication. However, they require additional oil pumps and lines, resulting in system complexity and high costs. With the advent of electrification, some vehicles have eliminated the complex structure of the transmission, often simplifying gear transmissions to single-gear multi-stage gear drives. While this simplifies the structure, active lubrication remains costly. Existing splash lubrication systems only provide basic lubrication and cannot meet the diverse lubrication needs across various operating conditions and angles, failing to achieve the same effect as active lubrication.

[0003] There is currently no effective solution to the aforementioned problems in the existing technology. Summary of the Invention

[0004] The main objective of this invention is to provide a drive axle lubrication system and a vehicle having the same, so as to solve the problem that the lubrication cost and lubrication quality of the drive axle cannot be balanced in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a housing is provided, wherein a receiving cavity is formed inside the housing, and a reservoir for storing lubricating fluid is formed at the bottom of the receiving cavity, and both the driving gear and the driven gear of the drive axle are located within the receiving cavity; an oil collector is provided, disposed between the driven gear and the housing, and an oil collection box is provided at the top of the oil collector, wherein when the driven gear rotates, it causes the lubricating fluid in the reservoir to splash into the oil collection box; wherein a first oil inlet channel is provided inside the housing, the inlet end of the first oil inlet channel communicating with the oil collection box, and the outlet end of the first oil inlet channel extending to the support bearing of the driving gear; a second oil inlet channel is provided on the oil collector, the inlet end of the second oil inlet channel communicating with the oil collection box, and the outlet end of the second oil inlet channel extending to the support bearing of the driven gear.

[0006] Furthermore, the support bearings of the drive gear include a front drive bearing and a rear drive bearing, which are arranged opposite each other along the axial direction of the drive gear, and the outlet end of the first oil inlet extends into the annular gap formed between the front drive bearing and the rear drive bearing.

[0007] Furthermore, the driven gear's support bearing includes an inner output bearing and an outer output bearing, which are arranged opposite each other along the axial direction of the driven gear. The outlet end of the second oil inlet extends to the inner output bearing, wherein the inner output bearing is a support bearing located on the side of the driven gear away from the wheel.

[0008] Furthermore, the drive axle lubrication system also includes: an end cover, which is located on one side of the housing and connected to the housing; an output outer bearing located in the placement cavity formed by the end cover and the housing; a portion of the driven gear extending into the placement cavity; and an oil baffle plate connected to the top side wall of the placement cavity. When the driven gear rotates, the lubricant at the bottom of the placement cavity can splash onto the oil baffle plate. The end cover also has at least one side cover oil inlet channel, with the inlet end of the side cover oil inlet channel located near the oil baffle plate and the outlet end of the side cover oil inlet channel extending to the output outer bearing.

[0009] Furthermore, the bottom of the oil baffle is provided with a burr structure. The first end of the burr structure is connected to the oil baffle, and the second end of the burr structure extends away from the oil baffle. The burr structure is used to guide the lubricating fluid intercepted by the oil baffle to the inlet end of the side cover oil inlet channel.

[0010] Furthermore, the extension direction of the second end of the flash structure is opposite to the splashing direction of the lubricant, and the second end of the flash structure is inclined.

[0011] Furthermore, an oil baffle is provided on the side of the housing near the output inner bearing, and a fixed baffle is connected to the housing near the oil baffle. The oil baffle and the fixed baffle form a connecting oil passage. The input end of the connecting oil passage is located near the drive gear, and the output end of the connecting oil passage is located near the output inner bearing, so that the connecting oil passage can guide the lubricating fluid carried by the rotation of the drive gear to the output inner bearing.

[0012] Furthermore, a third oil inlet channel is provided inside the housing. The inlet end of the third oil inlet channel is located near the meshing position of the driving gear and the driven gear, and the outlet end of the third oil inlet channel extends into the annular gap.

[0013] Furthermore, at least one of the first oil inlet channel and the third oil inlet channel is obtained by machining the shell, and / or at least one of the first oil inlet channel and the third oil inlet channel is obtained by casting the shell.

[0014] Furthermore, both the first and third oil inlets are inclined, with the inclination angle of the first oil inlet not less than the vehicle's maximum climbing angle, and / or the inclination angle of the third oil inlet not less than the vehicle's maximum climbing angle.

[0015] Furthermore, an oil return channel is provided inside the housing. The inlet end of the oil return channel is located near the drive rear bearing, and the outlet end of the oil return channel is connected to the liquid storage space.

[0016] Furthermore, the third oil inlet is an elongated hole, and a guide structure is formed on the inner wall of the housing near the inlet end of the third oil inlet. The guide structure is a groove with its opening facing the center of the receiving cavity. The guide structure is used to collect some of the splashed lubricant in the inlet end of the third oil inlet.

[0017] Furthermore, a wedge-shaped structure is provided on the inner wall of the housing, with the end of the wedge-shaped structure extending into the guide structure. The wedge-shaped structure is used to guide the lubricating oil splashed by the driven gear into the guide structure.

[0018] According to another aspect of the present invention, a vehicle is provided, including a drive axle lubrication system, wherein the drive axle lubrication system is the drive axle lubrication system described above.

[0019] By applying the technical solution of this invention, and by setting up an oil collection rack with a second oil inlet channel on the oil collection rack, and a first oil inlet channel within the housing, while utilizing the driven gear for splash lubrication, all-round, multi-angle lubrication of the support bearings of both the driving gear and the driven gear is achieved. This eliminates the need for components such as oil pumps and oil pipes, achieving the same precise lubrication effect as active lubrication. The technical solution of this application solves the problem in the prior art where lubrication cost and lubrication quality in the drive axle cannot be simultaneously achieved. Attached Figure Description

[0020] 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:

[0021] Figure 1 A schematic diagram of a first embodiment of a drive axle lubrication system according to the present invention is shown;

[0022] Figure 2 A schematic diagram of a second embodiment of the drive axle lubrication system according to the present invention is shown;

[0023] Figure 3 A schematic diagram of a third embodiment of the drive axle lubrication system according to the present invention is shown;

[0024] Figure 4 A schematic diagram of a fourth embodiment of the drive axle lubrication system according to the present invention is shown;

[0025] Figure 5 A schematic diagram of the structure of a first embodiment of the oil collection rack according to the present invention is shown;

[0026] Figure 6 A schematic diagram of a second embodiment of the oil collection rack according to the present invention is shown;

[0027] Figure 7 A schematic diagram of an embodiment of the end cap according to the present invention is shown.

[0028] The above figures include the following reference numerals:

[0029] 1. Housing; 2. Drive gear; 3. Driven gear; 4. Oil collector frame; 5. Oil collection box; 6. First oil inlet; 7. Second oil inlet; 8. Front drive bearing; 9. Rear drive bearing; 10. Output inner bearing;

[0030] 11. Output outer bearing; 12. End cover; 13. Oil baffle; 14. Side cover oil inlet channel; 15. Flanged structure; 16. Oil baffle rib; 17. Fixed baffle; 18. Connecting oil passage; 19. Third oil inlet channel; 20. Return oil channel;

[0031] 21. Guide structure; 22. Wedge structure;

[0032] 23. L-shaped structure. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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 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.

[0036] 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.

[0037] Combination Figures 1 to 7 As shown, according to a specific embodiment of this application, a drive axle lubrication system is provided.

[0038] The drive axle lubrication system includes a housing 1 and an oil collector 4. The housing 1 has an internal cavity, with a lubricant reservoir at the bottom. Both the drive gear 2 and the driven gear 3 of the drive axle are located within this cavity. The oil collector 4 is positioned between the driven gear 3 and the housing 1, and has an oil collection box 5 at its top. When the driven gear 3 rotates, the lubricant in the reservoir splashes into the oil collection box 5. The housing 1 has a first oil inlet channel 6, whose inlet end connects to the oil collection box 5, and whose outlet end extends to the support bearing of the drive gear 2. The oil collector 4 has a second oil inlet channel 7, whose inlet end connects to the oil collection box 5, and whose outlet end extends to the support bearing of the driven gear 3.

[0039] By applying the technical solution of this invention, and by setting up an oil collection frame 4 with a second oil inlet channel 7 on the oil collection frame 4, and a first oil inlet channel 6 inside the housing 1, while using the driven gear 3 for splash lubrication, all-round, multi-angle lubrication of the support bearings of the driving gear 2 and the driven gear 3 is achieved. This eliminates the need for components such as oil pumps and oil pipes, achieving the same precise lubrication effect as active lubrication. The technical solution of this application solves the problem in the prior art where lubrication cost and lubrication quality of the drive axle cannot be simultaneously achieved.

[0040] like Figure 3 As shown, the supporting bearings of the drive gear 2 include a front drive bearing 8 and a rear drive bearing 9, which are arranged opposite each other along the axial direction of the drive gear 2. The outlet end of the first oil inlet 6 extends into the annular gap formed between the front drive bearing 8 and the rear drive bearing 9. This arrangement ensures the lubrication effect at the supporting bearings of the drive gear 2, achieving precise lubrication and the same technical effect as active lubrication. The front drive bearing 8 and the rear drive bearing 9 together support the drive gear 2.

[0041] like Figure 3As shown, the supporting bearings of the driven gear 3 include an inner output bearing 10 and an outer output bearing 11. The inner output bearing 10 and the outer output bearing 11 are arranged opposite each other along the axial direction of the driven gear 3. The outlet end of the second oil inlet 7 extends to the inner output bearing 10. The inner output bearing 10 is a supporting bearing located on the side of the driven gear 3 away from the wheel. The inner output bearing 10 and the outer output bearing 11 together support the driven gear 3. The driving gear 2 and the driven gear 3 mesh to achieve power transmission. The technical solution of this embodiment improves the lubrication effect on the inner output bearing 10.

[0042] The oil collection frame 4 is connected to the housing 1 by bolts. An inverted T-shaped oil collection box is designed on the top of the oil collection frame 4. The oil collection box has two outlets. The first outlet is directly opposite the first oil inlet of the housing. The second outlet is connected to the oil guide groove (second oil inlet 7) below the oil collection frame to lubricate the output inner bearing.

[0043] The flow distribution of the two oil outlets of the oil collector 4 can be arbitrarily designed according to design requirements by changing the size and position of the oil outlets to meet the lubrication needs of the active bevel gear support bearing and the output inner bearing.

[0044] The oil collector 4 is designed in a conformal arc shape to better fit the driven gear and collect the gear oil it splashes out. The drive bevel gear support bearing, output inner bearing, and oil return channel are designed behind the oil collector 4, as shown below. Figure 2 As shown, the output inner bearing is located on the side of the oil collector 4 away from the wheel. The oil agitated by the driven gear will not run wildly along the axial direction of the driven gear, but will only run along the arc-shaped contour of the oil collector 4. Figure 2 The part with multiple reinforcing ribs in the middle is forward, and the oil collection rack 4 is used to reduce the return speed of gear oil and reduce the oil churning loss of the gear.

[0045] like Figure 1 and Figure 7 As shown, the drive axle lubrication system further includes: an end cover 12, located on one side of the housing 1 and connected to the housing 1; an output outer bearing 11 located within a placement cavity formed by the end cover 12 and the housing 1; a portion of the driven gear 3 extending into the placement cavity; an oil baffle 13 connected to the top side wall of the placement cavity; wherein, when the driven gear 3 rotates, the lubricant at the bottom of the placement cavity can splash onto the oil baffle 13; at least one side cover oil inlet channel 14 is also provided inside the end cover 12; the inlet end of the side cover oil inlet channel 14 is located near the oil baffle 13; and the outlet end of the side cover oil inlet channel 14 extends to the output outer bearing 11. Figure 7The diagram shown is an enlarged view of the oil baffle 13 of the end cover 12. The end cover 12 is located on one side of the housing 1, meaning that the end cover 12 is located on the side of the housing 1 closer to the wheel. By providing a side cover oil inlet channel 14 inside the end cover 12 and using the oil baffle 13 to achieve splash lubrication, the end cover 12 has the functions of blocking and guiding oil, thus meeting the lubrication requirements of the output outer bearing 11. Figure 1 The side cover oil inlet channel 14 shown is two, both of which are holes inside the end cover, similar to the cylinder water jacket of an engine.

[0046] The end cap 12 has a baffle structure between the two side cover oil inlet channels 14, and two threaded holes on the top of the end cap 1 are used to fix the oil baffle plate 13. The two side cover oil inlet channels 14 are arranged in the middle of the top of the end cap 12, that is, at the twelve o'clock position.

[0047] The oil baffle 13 is designed to conform to the shape of the driven bevel gear, which is conducive to collecting the gear oil thrown out by the driven bevel gear. The oil baffle and the baffle rib structure on the end cover 12 together form an oil baffle structure, which blocks the gear oil thrown out by the driven bevel gear and uses the flash structure to guide the gear oil into the side cover oil inlet channel 14 of the end cover 12.

[0048] Optionally, the two side cover oil inlet channels 14 are arranged symmetrically with respect to the oil baffle plate, so as to ensure that the output outer bearing can be adequately lubricated in both forward and reverse gear conditions.

[0049] Furthermore, a burr structure 15 is provided at the bottom of the oil baffle 13. The first end of the burr structure 15 is connected to the oil baffle 13, and the second end of the burr structure 15 extends away from the oil baffle 13. The burr structure 15 is used to guide the lubricating fluid intercepted by the oil baffle 13 to the inlet end of the side cover oil inlet channel 14. By providing the burr structure 15, the oil inlet efficiency of the side cover oil inlet channel 14 can be further improved, and the oil churning loss can be reduced. Furthermore, the extension direction of the second end of the burr structure 15 is opposite to the splashing direction of the lubricating fluid, and the second end of the burr structure 15 is inclined.

[0050] like Figure 2 and Figure 4 As shown, an oil baffle 16 is provided on the side of the housing 1 near the output inner bearing 10. A fixed baffle 17 is connected to the housing 1 near the oil baffle 16. The oil baffle 16 and the fixed baffle 17 form a connecting oil passage 18. The input end of the connecting oil passage 18 is located near the drive gear 2, and the output end of the connecting oil passage 18 is located near the output inner bearing 10, so that the connecting oil passage 18 can guide the lubricating fluid carried by the rotation of the drive gear 2 to the output inner bearing 10. Under the action of the oil baffle 16 and the fixed baffle 17, the oil carried by the rotation of the drive bevel gear is collected and guided to lubricate the output inner bearing, realizing the lubrication circulation of the two cavities.

[0051] Furthermore, a third oil inlet channel 19 is also provided inside the housing 1. The inlet end of the third oil inlet channel 19 is located near the meshing position of the driving gear 2 and the driven gear 3, and the outlet end of the third oil inlet channel 19 extends into the annular gap. This arrangement can further improve the lubrication effect at the annular gap, and the oil for this lubrication method comes from the meshing point of the driving and driven gears.

[0052] Furthermore, at least one of the first oil inlet channel 6 and the third oil inlet channel 19 is obtained by machining the shell 1, and / or, at least one of the first oil inlet channel 6 and the third oil inlet channel 19 is obtained by casting the shell 1.

[0053] Furthermore, both the first oil inlet 6 and the third oil inlet 19 are inclined, with the inclination angle of the first oil inlet 6 not less than the vehicle's maximum climbing angle, and / or the inclination angle of the third oil inlet 19 not less than the vehicle's maximum climbing angle. The inclination angle refers to the angle formed with the horizontal plane. The ends of both the first oil inlet 6 and the third oil inlet 19 are located at the midpoint of the two support bearings of the drive bevel gear, to simultaneously meet the lubrication requirements of both bearings.

[0054] The first oil inlet 6 is located at the top and collects gear oil from the oil collection rack. The third oil inlet 19 is located on the side, with its inlet section near the meshing point of the driving bevel gear and the driven bevel gear, and collects gear oil pumped out from the meshing of the driving and driven bevel gears.

[0055] Furthermore, a return oil channel 20 is also provided inside the housing 1. The inlet end of the return oil channel 20 is located near the drive rear bearing 9, and the outlet end of the return oil channel 20 is connected to the liquid storage space.

[0056] like Figure 4 The L-shaped structure 23 is also shown. The outer end face of the inlet end of the first oil inlet channel 6 is designed as an L-shaped structure to facilitate oil collection.

[0057] Furthermore, the third oil inlet passage 19 is an elongated hole, and a guide structure 21 is formed on the inner wall of the housing 1 near the inlet end of the third oil inlet passage 19. The guide structure 21 is a groove with its opening facing the center of the receiving cavity. The guide structure 21 is used to collect a portion of the splashed lubricant into the inlet end of the third oil inlet passage 19. The guide structure 21 is also known as... Figure 4 The C-shaped groove shown in the image can improve the oil collection effect.

[0058] Furthermore, a wedge-shaped structure 22 is provided on the inner sidewall of the housing 1. The end of the wedge-shaped structure 22 extends into the guide structure 21. The wedge-shaped structure 22 is used to guide the lubricating oil splashed by the driven gear into the guide structure 21. The sidewall is designed as a wedge-shaped structure, which allows the gear oil splashed by the outer surface of the driven bevel gear to pass through the wedge-shaped structure, thereby increasing the speed and pressure of the gear oil entering the third oil inlet passage 19, which is beneficial for oil entry.

[0059] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0060] A lubrication structure and system suitable for longitudinally mounted hybrid reducers is proposed. It adopts the traditional splash lubrication method, which can meet the lubrication needs of multiple working conditions and multiple angles, and achieve the same purpose as active lubrication.

[0061] The drive axle lubrication system described in the above embodiments can be applied to various vehicle types, including new energy vehicles and traditional internal combustion engine vehicles.

[0062] New energy vehicles refer to automobiles that use renewable energy as their power source. Compared to traditional gasoline-powered vehicles, new energy vehicles have lower exhaust emissions and higher energy efficiency, and are considered an important way to solve environmental pollution and energy crises. New energy vehicles are mainly divided into two types: electric vehicles and hybrid vehicles. Electric vehicles use batteries or fuel cells as their power source, completely eliminating exhaust emissions and featuring zero emissions and low noise. Hybrid vehicles, on the other hand, are equipped with both a gasoline engine and an electric motor, using an intelligent control system to achieve coordinated operation of the two power sources for higher fuel economy. With technological advancements and government support for the environmental protection industry, new energy vehicles have developed rapidly worldwide. Many countries have introduced various policies to encourage the development of new energy vehicles, such as reducing or exempting vehicle purchase taxes and providing charging infrastructure. Meanwhile, the technology of new energy vehicles is constantly innovating and improving, with battery capacity gradually increasing, driving range continuously improving, and charging time shortening. In addition to the advantages of environmental protection and energy efficiency, new energy vehicles also have certain economic advantages. Although the purchase cost of new energy vehicles is relatively high, the operating cost is low. According to calculations, the cost per kilometer of driving a new energy vehicle is only about half that of a traditional gasoline-powered vehicle, saving a significant amount of fuel costs.

[0063] Using the technical solution of this application, a new energy vehicle is also provided, including a drive axle lubrication system, wherein the drive axle lubrication system is the drive axle lubrication system in the above embodiments.

[0064] A traditional internal combustion engine vehicle refers to a car that uses a traditional internal combustion engine as its power source. It is one of the most commonly used types of automobiles today. A traditional internal combustion engine vehicle typically consists of the following parts:

[0065] 1. Engine: Traditional internal combustion engines use fuel engines as the primary power source. The engine generates energy by burning fuel and converts it into mechanical energy to drive the vehicle.

[0066] 2. Fuel System: The fuel system is responsible for delivering fuel from the fuel tank to the engine and ensuring an adequate fuel supply.

[0067] 3. Transmission System: The transmission system transmits power from the engine to the wheels to propel the vehicle forward. Traditional internal combustion engine vehicles typically use conventional mechanical transmission systems, such as manual or automatic transmissions.

[0068] 4. Emission System: The emission system is responsible for treating the exhaust gases produced by engine combustion and releasing them into the atmosphere. These systems typically include the catalyst and the exhaust system.

[0069] 5. Cooling System: The cooling system controls the engine temperature by circulating coolant to prevent overheating and damage.

[0070] 6. Electrical System: The electrical system provides power to various electronic devices in the vehicle, such as headlights, audio systems, and air conditioning.

[0071] Using the technical solution of this application, an internal combustion engine vehicle is also provided, including a drive axle lubrication system, wherein the drive axle lubrication system is the drive axle lubrication system in the above embodiments.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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 lubrication system, characterized in that, include: The housing (1) has an internal cavity, and the bottom of the cavity forms a storage space for storing lubricating fluid. The driving gear (2) of the drive axle and the driven gear (3) of the drive axle are both located in the cavity. An oil collection rack (4) is disposed between the driven gear (3) and the housing (1). The top of the oil collection rack (4) has an oil collection box (5). When the driven gear (3) rotates, it causes the lubricating fluid in the storage space to splash into the oil collection box (5). The housing (1) is provided with a first oil inlet channel (6), the inlet end of the first oil inlet channel (6) is connected to the oil collection box (5), and the outlet end of the first oil inlet channel (6) extends to the support bearing of the drive gear (2). The oil collection rack (4) is provided with a second oil inlet channel (7), the inlet end of the second oil inlet channel (7) is connected to the oil collection box (5), and the outlet end of the second oil inlet channel (7) extends to the support bearing of the driven gear (3). The driven gear (3) has an output inner bearing (10) and an output outer bearing (11) as its supporting bearings. The driving gear (2) has a driving front bearing (8) and a driving rear bearing (9) as its supporting bearings. The driving front bearing (8) and the driving rear bearing (9) are arranged opposite to each other along the axial direction of the driving gear (2). The outlet end of the first oil inlet (6) extends into the annular gap formed between the driving front bearing (8) and the driving rear bearing (9). The drive axle lubrication system also includes: An end cap (12) is located on one side of the housing (1) and is connected to the housing (1). The output outer bearing (11) is located in the placement cavity formed by the end cap (12) and the housing (1). Part of the driven gear (3) extends into the placement cavity. An oil baffle (13) is connected to the top side wall of the placement cavity. When the driven gear (3) rotates, the lubricant at the bottom of the placement cavity can splash onto the oil baffle (13). At least one side cover oil inlet channel (14) is also provided inside the end cap (12). The inlet end of the side cover oil inlet channel (14) is located close to the oil baffle plate (13), and the outlet end of the side cover oil inlet channel (14) extends to the output outer bearing (11); the bottom of the oil baffle plate (13) is provided with a flash structure (15), the first end of the flash structure (15) is connected to the oil baffle plate (13), and the second end of the flash structure (15) extends away from the oil baffle plate (13). The flash structure (15) is used to guide the lubricating fluid intercepted by the oil baffle plate (13) to the inlet end of the side cover oil inlet channel (14); The extension direction of the second end of the flash structure (15) is opposite to the splash direction of the lubricant, and the second end of the flash structure (15) is inclined. The housing (1) is also provided with a third oil inlet channel (19). The inlet end of the third oil inlet channel (19) is located close to the meshing position of the driving gear (2) and the driven gear (3), and the outlet end of the third oil inlet channel (19) extends into the annular gap. The third oil inlet channel (19) is an elongated hole. A guide structure (21) is formed on the inner wall of the housing (1) near the inlet end of the third oil inlet channel (19). The guide structure (21) is a groove with its opening facing the center of the receiving cavity. The guide structure (21) is used to collect a portion of the splashed lubricant into the inlet end of the third oil inlet channel (19). A wedge structure (22) is also provided on the inner wall of the housing (1). The end of the wedge structure (22) extends into the guide structure (21). The wedge structure (22) is used to guide the lubricant splashed by the driven gear (3) into the guide structure (21).

2. The drive axle lubrication system according to claim 1, characterized in that, The inner output bearing (10) and the outer output bearing (11) are arranged opposite each other along the axial direction of the driven gear (3), and the outlet end of the second oil inlet (7) extends to the inner output bearing (10). The inner output bearing (10) is a support bearing located on the side of the driven gear (3) away from the wheel.

3. The drive axle lubrication system according to claim 2, characterized in that, The housing (1) is provided with an oil baffle rib (16) on the side near the output inner bearing (10). The housing (1) is connected to a fixed baffle (17) near the oil baffle rib (16). The oil baffle rib (16) and the fixed baffle (17) form a connecting oil passage (18). The input end of the connecting oil passage (18) is located near the drive gear (2), and the output end of the connecting oil passage (18) is located near the output inner bearing (10), so that the connecting oil passage (18) can guide the lubricating fluid carried by the rotation of the drive gear (2) to the output inner bearing (10).

4. The drive axle lubrication system according to claim 1, characterized in that, At least one of the first oil inlet channel (6) and the third oil inlet channel (19) is obtained by machining the housing (1), and / or at least one of the first oil inlet channel (6) and the third oil inlet channel (19) is obtained by casting the housing (1).

5. The drive axle lubrication system according to claim 4, characterized in that, The first oil inlet (6) and the third oil inlet (19) are both inclined. The inclination angle of the first oil inlet (6) is not less than the maximum climbing angle of the vehicle, and / or the inclination angle of the third oil inlet (19) is not less than the maximum climbing angle of the vehicle.

6. The drive axle lubrication system according to claim 1, characterized in that, The housing (1) is also provided with an oil return channel (20), the inlet end of the oil return channel (20) is located near the active rear bearing (9), and the outlet end of the oil return channel (20) is connected to the liquid storage space.

7. A vehicle comprising a drive axle lubrication system, characterized in that, The drive axle lubrication system is the drive axle lubrication system according to any one of claims 1 to 6.

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