Transmission, wheel rim drive axle assembly and vehicle

Abstract

A transmission, a wheel rim drive axle assembly, and a vehicle. The transmission comprises: a first housing (100) and a second housing (200), wherein the second housing (200) and the first housing (100) define an accommodating cavity; a transmission mechanism, comprising a gear assembly and a bearing assembly which are arranged inside the accommodating cavity, wherein the gear assembly is connected to the first housing (100) and the second housing (200) by means of the bearing assembly; and a lubricating oil passage, which comprises a housing oil passage arranged in the first housing (100) and / or the second housing (200) and a lubricating pipe arranged inside the accommodating cavity and communicated with the housing oil passage.

Description

Transmission, wheel drive axle assembly and vehicle

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202411055229.5, filed on August 2, 2024, and entitled “Transmission, wheel drive axle assembly and vehicle”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of vehicles, in particular, to a transmission, a wheel drive axle assembly and a vehicle. BACKGROUND

[0004] The wheel drive main reducer is used for transmitting power to the secondary reducer and the wheel end. The internal part is mainly lubricated by the splash lubrication mode of gear stirring oil. On the one hand, for the bearing arranged at a relatively high position, it is difficult for the lubricating oil to reach this position by stirring oil, and the bearing and tooth surface are at risk of failure. On the other hand, increasing the lubricating oil level to increase lubrication will increase the stirring oil loss, reduce the transmission efficiency, and may also increase the risk of oil jumping between the reducer and the external setting. SUMMARY

[0005] The purpose of the present disclosure is to provide a transmission, a wheel drive axle assembly and a vehicle, which can reduce the risk of bearing and tooth surface failure caused by insufficient lubrication, significantly reduce the lubricating oil level in the transmission, and when there is a specific demand, the lubricating oil level can be lower than all gear assemblies and bearing assemblies, greatly reduce the stirring oil loss, and improve the transmission efficiency.

[0006] In order to achieve the above-mentioned purpose, according to the first aspect of the present disclosure, a transmission is provided, comprising:

[0007] a first housing;

[0008] a second housing connected to the first housing and surrounding the first housing to form a containing cavity;

[0009] a transmission mechanism comprising a gear assembly and a bearing assembly arranged inside the containing cavity, the gear assembly being connected to the first housing and the second housing through the bearing assembly; and

[0010] a lubricating oil channel comprising a housing oil channel arranged in the first housing and / or the second housing and a lubricating pipeline arranged inside the containing cavity and communicating with the housing oil channel, the housing oil channel and the lubricating pipeline being used to provide lubricating oil to the gear assembly and the bearing assembly for lubrication and cooling of the gear assembly and the bearing assembly.

[0011] Optionally, the gear assembly comprises a first shaft with a gear portion, and a second shaft with an output gear mounted thereon;

[0012] The bearing assembly comprises a first bearing assembly, a second bearing assembly, a third bearing assembly and a fourth bearing assembly;

[0013] One end of the first shaft is connected to the first housing through the first bearing assembly, and the other end is connected to the second housing through the second bearing assembly;

[0014] One end of the second shaft is connected to the first housing through the third bearing assembly, and the other end is connected to the second housing through the fourth bearing assembly;

[0015] The first housing is provided with a first housing oil passage for lubricating the first bearing assembly and the third bearing assembly, and the second housing is provided with a second housing oil passage for lubricating the second bearing assembly.

[0016] Optionally, the first housing is provided with a first oil inlet, and the first housing oil passage comprises a first oil passage connecting the first oil inlet and the mounting position of the third bearing assembly, and a communication oil passage connecting the mounting position of the first bearing assembly and the mounting position of the third bearing assembly.

[0017] Optionally, the mounting position of the third bearing assembly is located above the mounting position of the first bearing assembly, and the communication oil passage extends in a substantially vertical direction.

[0018] Optionally, the gear assembly comprises at least one transmission gear transmissionally connected to the gear portion and the output gear, and at least one transmission shaft fixedly connected to the first housing and the second housing respectively; the transmission gear is rotationally connected to the transmission shaft through a transmission bearing;

[0019] The transmission shaft is formed with an internal oil passage connecting the first housing oil passage and the second housing oil passage, so that the lubricating oil of the first housing oil passage flows to the second housing oil passage.

[0020] Optionally, the transmission shaft is formed with an oil outlet communicating with the internal oil passage and corresponding to the transmission bearing.

[0021] Optionally, the first housing oil passage further comprises a second oil passage, one end of the internal oil passage communicates with the second oil passage;

[0022] The second housing oil passage includes an oil inlet communicating with the other end of the internal oil passage, and a third oil outlet corresponding to the mounting position of the second bearing assembly, so that the lubricating oil of the second oil passage of the first housing oil passage can be transferred to the second housing oil passage through the internal oil passage to lubricate the second bearing assembly.

[0023] Optionally, the gear assembly includes a first transmission gear and a second transmission gear that mesh with the gear section and the output gear respectively, and a third shaft and a fourth shaft that are respectively connected to the first housing and the second housing;

[0024] The first transmission gear and the second transmission gear are respectively connected to the third shaft and the fourth shaft via the first transmission bearing and the second transmission bearing;

[0025] The third shaft and the fourth shaft are respectively formed with a first internal oil passage and a second internal oil passage connecting the first housing oil passage and the second housing oil passage, so that the lubricating oil in the first housing oil passage flows to the second housing oil passage.

[0026] The first internal oil passage and the second internal oil passage are respectively provided with a first oil outlet and a second oil outlet corresponding to the first transmission bearing and the second transmission bearing.

[0027] Optionally, the first housing oil passage further includes a second oil passage, and one end of the first internal oil passage and the second internal oil passage are respectively connected to the second oil passage;

[0028] The second housing oil passage includes two oil inlets, one and the other, which are respectively connected to the other end of the first internal oil passage and the second internal oil passage, and a third oil outlet corresponding to the mounting position of the second bearing assembly, so that the lubricating oil of the second oil passage of the first housing can be transferred to the second housing oil passage through the first internal oil passage and the second internal oil passage to lubricate the second bearing assembly.

[0029] Optionally, the first housing is provided with a second oil inlet communicating with the second oil passage; or

[0030] The second oil passage is connected to the first oil inlet of the first housing.

[0031] Optionally, the lubrication line includes at least a portion of the bearing assembly and / or a port corresponding to the gear meshing point of the gear assembly for lubrication of the bearing assembly and the gear assembly.

[0032] Optionally, the lubrication line includes a first line communicating with a first oil passage in the first housing, the first line including a first port corresponding to the fourth bearing assembly and used for lubricating the fourth bearing assembly.

[0033] Optionally, the first conduit further includes a second port corresponding to the first side of the meshing point between the first transmission gear and the output gear; and / or

[0034] The first pipeline further includes a second side corresponding to the meshing point of the first transmission gear and the output gear, and a third port corresponding to the first side corresponding to the meshing point of the gear and the first transmission gear.

[0035] Optionally, the lubrication line further includes a second line, the second line including a fourth port corresponding to the second side of the meshing point between the gear and the first transmission gear; and / or

[0036] The second conduit further includes a fifth port corresponding to the first side of the meshing point between the gear section and the second transmission gear; and / or

[0037] The second conduit further includes a second side corresponding to the meshing point of the gear section and the second transmission gear, and a sixth port corresponding to the first side corresponding to the meshing point of the second transmission gear and the output gear; and / or

[0038] The second pipeline also includes a seventh port corresponding to the meshing point of the second transmission gear and the output gear and the second side.

[0039] Optionally, the lubrication channel configuration can adjust the amount of oil supplied to the gear assembly and the bearing assembly to adapt to different operating conditions.

[0040] According to a second aspect of this disclosure, a wheel-side drive axle assembly is provided, including a motor mount and a half-shaft sleeve, the wheel-side drive axle assembly further including the aforementioned transmission;

[0041] The motor mount forms the first housing, and the half-shaft sleeve forms the second housing.

[0042] Optionally, the wheel-side drive axle assembly further includes an oil supply pump, one end of which is connected to an oil tank and the other end of which is connected to the lubrication oil passage.

[0043] The wheel-side drive axle assembly also includes an oil cooler and / or a filter located in the oil passage between the oil supply pump and the lubrication oil passage.

[0044] According to a third aspect of this disclosure, a vehicle is also provided, the vehicle including the above-described transmission or including the above-described wheel-side drive axle assembly.

[0045] The transmission disclosed herein utilizes the aforementioned technical solution. By arranging lubricating oil passages in the first and / or second housings, and simultaneously providing lubricating pipelines within the accommodating cavity formed by the first and second housings, lubricating oil is directionally delivered to the lubrication points of the gear and bearing assemblies through a combination of housing oil passages and lubrication pipelines, thereby achieving lubrication and cooling of the gear and bearing assemblies. This transmission reduces the risk of bearing and gear failure due to insufficient lubrication, significantly lowers the lubricating oil level in the transmission, and, under specific conditions, allows the lubricating oil level to be lower than that of all gear and bearing assemblies, greatly reducing churning losses and improving transmission efficiency.

[0046] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0047] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0048] Figure 1 is an exploded view of a transmission provided in some embodiments of this disclosure.

[0049] Figure 2 is a schematic diagram of the arrangement of lubrication channels in a transmission according to some embodiments of the present disclosure.

[0050] Figure 3 is a schematic diagram of the arrangement of lubrication channels in the second housing of a transmission provided in some embodiments of this disclosure.

[0051] Figure 4 is a schematic diagram of the bearing lubrication method of the first transmission gear and the second transmission gear of the transmission provided in some embodiments of this disclosure.

[0052] Figure 5 is a schematic diagram of the internal oil passage lubrication method of the first transmission gear and the second transmission gear of the transmission provided in some embodiments of this disclosure.

[0053] Figure 6 is a schematic diagram of the overall layout of the transmission provided in some embodiments of this disclosure.

[0054] Figure 7 is a diagram showing the oil circuit connection between the oil tank, oil supply pump and transmission in a wheel-side drive axle assembly provided in some exemplary embodiments of this disclosure.

[0055] Figure 8 is a schematic block diagram of the structure of a vehicle provided in an exemplary embodiment of this disclosure. Detailed Implementation

[0056] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0057] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the outline of the corresponding component itself. The terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0058] The purpose of this disclosure is to provide a transmission 10, a wheel-side drive axle assembly 800, and a vehicle 1000. The transmission 10 can reduce the risk of bearing and gear failure due to insufficient lubrication, and can also keep the lubricating oil level in the transmission 10 below that of all gear assemblies 300a and bearing assemblies 300b, thereby significantly reducing oil churning losses and improving the transmission efficiency of the transmission 10.

[0059] To achieve the above objectives, as shown in Figures 1 to 6, an embodiment of the present disclosure provides a transmission 10, which includes a first housing 100, a second housing 200, a transmission mechanism 300, and a lubrication channel 700. The first housing 100 is connected to the second housing 200, and the second housing 200 and the first housing 100 form a receiving cavity 500. The transmission mechanism 300 includes a gear assembly 300a and a bearing assembly 300b disposed inside the receiving cavity 500. The gear assembly 300a is connected to the first housing 100 and the second housing 200 through the bearing assembly 300b. The lubrication oil passage 700 includes a housing oil passage 700a disposed in the first housing 100 and / or the second housing 200 and a lubrication pipe 700b disposed inside the receiving cavity 500 and communicating with the housing oil passage 700a. The housing oil passage 700a and the lubrication pipe 700b are used to provide lubricating oil to the gear assembly 300a and the bearing assembly 300b for lubrication and cooling of the gear assembly 300a and the bearing assembly 300b.

[0060] Through the above-described technical solution, namely the transmission 10 of this disclosure, lubricating oil passages 700 are arranged in the first housing 100 and / or the second housing 200, while lubricating pipes 700b are provided within the accommodating cavity 500 formed by the first housing 100 and the second housing 200. By combining the housing oil passages 700a and the lubricating pipes 700b, lubricating oil is directionally delivered to the lubrication points of the gear assemblies 300a and bearing assemblies 300b of the transmission 10, achieving lubrication and cooling of the gear assemblies 300a and bearing assemblies 300b. This transmission 10 can reduce the risk of bearing and gear surface failure due to insufficient lubrication, significantly lower the lubricating oil level in the transmission 10, and, under specific requirements, the lubricating oil level can be lower than that of all gear assemblies 300a and bearing assemblies 300b, greatly reducing oil churning losses and improving the transmission efficiency of the transmission 10.

[0061] It should be noted that, since some bearing assemblies 300b (e.g., the bearing assemblies 300b of the first shaft 310 and the second shaft 340) need to contact the first housing 100 and the second housing 200, the housing oil passage 700a is mainly used for the lubrication of these bearing assemblies 300b. Oil outlets corresponding to the mounting positions of the bearing assemblies 300b can be opened on the housing oil passage 700a to guide lubricating oil to the bearing assemblies 300b for lubrication and cooling. For the other bearing assemblies 300b that do not directly contact the first housing 100 and the second housing 200, lubrication lines 700b can be used, with nozzles 701a opened on the lubrication lines 700b to spray lubricating oil onto the bearing assemblies 300b or gear assemblies 300a to achieve lubrication and cooling.

[0062] In some embodiments, both the first housing 100 and the second housing 200 may be provided with housing oil passages 700a for guiding lubricating oil to the mounting position of the corresponding bearing assembly 300b for lubrication and cooling. Alternatively, housing oil passages 700a may be provided only on the first housing 100 or the second housing 200 for guiding lubricating oil to a portion of the bearing assemblies 300b, while the other portion of the bearing assemblies 300b (e.g., the bearing assemblies 300b of the third shaft 320 and the fourth shaft 330) may be lubricated and cooled through lubrication pipes 700b or by arranging oil passages inside the third shaft 320 and the fourth shaft 330, with oil ports corresponding to the bearing assemblies 300b.

[0063] As shown in Figures 1, 4, and 6, in some embodiments, gear assembly 300a includes a first shaft 310 having a gear portion 311 and a second shaft 340 on which an output gear 341 is mounted; bearing assembly 300b includes a first bearing assembly 312, a second bearing assembly 313, a third bearing assembly 342, and a fourth bearing assembly 343; one end of the first shaft 310 is connected to the first housing 100 via the first bearing assembly 312, and the other end is connected to the second housing 200 via the second bearing assembly 313; one end of the second shaft 340 is connected to the first housing 100 via the third bearing assembly 342, and the other end is connected to the second housing 200 via the fourth bearing assembly 343; the first housing 100 is provided with a first housing oil passage 110 for lubricating the first bearing assembly 312 and the third bearing assembly 342, and the second housing 200 is provided with a second housing oil passage 201 for lubricating the second bearing assembly 313.

[0064] The first shaft 310 can be a gear shaft, such as a motor shaft, or a shaft with a gear section 311 mounted on it. The first shaft 310 acts as a power input shaft, and it can be connected to a second shaft 340 with an output gear 341 mounted on it via a transmission assembly. Power is then output to other reducers or wheels via the second shaft 340. It should be noted that the diameters (e.g., pitch circle diameters) of the gear section 311 and the output gear 341 can be set according to the function of the transmission 10. When the transmission 10 is a reducer, the diameter of the output gear 341 is larger than the diameter of the gear section 311.

[0065] The first shaft 310 is rotatably connected to the first housing 100 and the second housing 200 via a first bearing assembly 312 and a second bearing assembly 313, respectively. The first bearing assembly 312 and the second bearing assembly 313 are respectively disposed on opposite sides of the gear portion 311 in the axial direction to realize the rotation of the first shaft 310. Similarly, the second shaft 340 is rotatably connected to the first housing 100 and the second housing 200 via a third bearing assembly 342 and a fourth bearing assembly 343, respectively. The third bearing assembly 342 and the fourth bearing assembly 343 are respectively disposed on opposite sides of the output gear 341 in the axial direction to realize the rotation of the second shaft 340.

[0066] A first housing oil passage 110 (e.g., first oil passage 1101) is provided on the first housing 100 to lubricate the first bearing assembly 312 and the third bearing assembly 342, and a second housing oil passage 201 is provided on the second housing 200 to lubricate the second bearing assembly 313. The first housing oil passage 110 and the second housing oil passage 201 can be connected and share a common oil inlet. Alternatively, oil can be supplied to both housing oil passages 700a by providing one oil inlet on each of the first housing 100 and the second housing 200. For example, one oil inlet can be connected to the first housing oil passage 110 to supply oil, and the other oil inlet can be connected to the second housing oil passage 201 to supply oil.

[0067] It should be noted that the first housing oil passage 110 and the second housing oil passage 201 can be constructed in any suitable manner or structure, as long as they can allow lubricating oil to flow and guide the lubricating oil to the corresponding bearing assembly 300b.

[0068] As shown in Figures 1 and 2, in some embodiments, the first housing 100 is provided with a first oil inlet 101, and the first housing oil passage 110 includes a first oil passage 1101 connecting the first oil inlet 101 and the mounting position of the third bearing assembly 342, and a connecting oil passage 1103 connecting the mounting position of the first bearing assembly 312 and the mounting position of the third bearing assembly 342. Specifically, the first housing 100 may have a first oil inlet 101, and the first housing oil passage 110 may include the first oil passage 1101, with one end of the first oil passage 1101 connected to the first oil inlet 101 and the other end connected to the mounting position of the third bearing assembly 342, for guiding lubricating oil to the third bearing assembly 342 for lubrication and cooling.

[0069] In some embodiments, the mounting position of the third bearing assembly 342 is located above the mounting position of the first bearing assembly 312, and the connecting oil passage 1103 extends generally in a vertical direction. As shown in FIG2, since the first bearing assembly 312 is located directly below the third bearing assembly 342, and the mounting position of the first bearing assembly 312 is connected to the mounting position of the third bearing assembly 342 through the connecting oil passage 1103 extending generally in a vertical direction, the lubricating oil reaching the mounting position of the third bearing assembly 342 can freely descend to the mounting position of the first bearing assembly 312 under the action of gravity through the connecting oil passage 1103 for the lubrication and cooling of the first bearing assembly 312. Understandably, since the first bearing assembly 312 can also be located to the side and below the third bearing assembly 342, and the connecting oil passage 1103 can also be an inclined or curved oil passage, and since the mounting position of the third bearing assembly 342 is located above the first bearing assembly 312 in the vertical direction, the lubricating oil at the third bearing assembly 342 can also flow to the mounting position of the first bearing assembly 312 under the action of gravity to achieve lubrication. It should be noted that a separate oil passage can also be provided, with one end connected to the first oil inlet 101 and the other end connected to the mounting position of the first bearing assembly 312, which can also achieve lubrication and cooling of the first bearing assembly 312.

[0070] The gear section 311 of the first shaft 310 can be driven to the output gear 341 of the second shaft 340 via the gear assembly 300a. The gear assembly 300a can realize two-stage transmission or multi-stage transmission. Therefore, the gear assembly 300a may include at least one transmission gear 301a that is driven to the gear section 311 and the output gear 341, and at least one transmission shaft 302a that is fixedly connected to the first housing 100 and the second housing 200 respectively. The transmission gear 301a is rotatably connected to the transmission shaft 302a via a transmission bearing 301b. An internal oil passage 700c is formed in the transmission shaft 302a to connect the oil passage 110 of the first housing and the oil passage 201 of the second housing, so that the lubricating oil of the oil passage 110 of the first housing flows to the oil passage 201 of the second housing. Among them, the transmission gear 301a can be an idler gear. Therefore, since the transmission shaft 302a is connected to the first housing 100 and the second housing 200 through a spline, and the transmission shaft 302a itself does not rotate, a seal can be formed at the connection between the transmission shaft 302a and the first housing 100 and the second housing 200, so that the lubricating oil in the first housing oil passage 110 can flow through the internal oil passage 700c of the transmission shaft 302a to the second housing oil passage 201.

[0071] To lubricate the transmission bearing 301b connected to the transmission shaft 302a, in some embodiments, the transmission shaft 302a has an oil outlet that communicates with the internal oil passage 700c and corresponds to the transmission bearing 301b. When the lubricating oil in the first housing oil passage 110 flows through the internal oil passage 700c to the second housing oil passage 201, it can be discharged from the oil outlet on the transmission shaft 302a, lubricating the transmission shaft 302a bearing and ensuring the operational reliability between the transmission gear 301a and the transmission shaft 302a bearing.

[0072] To achieve connection with the internal oil passage 700c and lubricate the second bearing assembly 313, in some embodiments, the first housing oil passage 110 further includes a second oil passage 1102, one end of the internal oil passage 700c being connected to the second oil passage 1102; the second housing oil passage 201 includes an oil inlet connected to the other end of the internal oil passage 700c, and a third oil outlet 204 corresponding to the mounting position of the second bearing assembly 313, so that the lubricating oil in the second oil passage 1102 of the first housing 100 can be transferred to the second housing oil passage 201 via the internal oil passage 700c to lubricate the second bearing assembly 313.

[0073] To achieve the transmission connection between the first shaft 310 and the second shaft 340, as shown in Figures 1, 2, 4, and 5, in some embodiments, the gear assembly 300a may include a first transmission gear 321 and a second transmission gear 331 (both of which are idler gears) that mesh with the gear section 311 and the output gear 341 respectively, and a third shaft 320 and a fourth shaft 330 that connect the first housing 100 and the second housing 200 respectively; the first transmission gear 321 and the second transmission gear 331 are respectively connected by a first transmission bearing. 322. The second transmission bearing 330 is connected to the third shaft 320 and the fourth shaft 330. The third shaft 320 and the fourth shaft 330 are respectively formed with a first internal oil passage 3201 and a second internal oil passage 3301 connecting the first housing oil passage 110 and the second housing oil passage 201, so that the lubricating oil of the first housing oil passage 110 can flow to the second housing oil passage 201. The first internal oil passage 3201 and the second internal oil passage 3301 are respectively formed with a first oil outlet 3202 and a second oil outlet 3302 corresponding to the first transmission bearing 322 and the second transmission bearing 330.

[0074] The first transmission gear 321 and the second transmission gear 331 are arranged at intervals and mesh with the gear section 311 of the first shaft 310 and the output gear 341 of the second shaft 340, respectively, to transmit power from the first shaft 310 to the second shaft 340. Speed ​​changes (e.g., deceleration or acceleration) are achieved through the meshing of the gear section 311 with the first transmission gear 321 and the second transmission gear 331, and the meshing of the first transmission gear 321 and the second transmission gear 331 with the output gear 341, respectively. The first transmission gear 321 is connected to the third shaft 320 via the first transmission bearing 322, and the second transmission gear 331 is connected to the fourth shaft 330 via the second transmission bearing 330. The first internal oil passage 3201 of the third shaft 320 is connected to the first housing oil passage 110, and the second internal oil passage 3301 of the fourth shaft 330 is connected to the first housing oil passage 110, so that the lubricant in the first housing oil passage 110 can reach the first oil outlet 3202 and the second oil outlet 3302 respectively through the first internal oil passage 3201 and the second internal oil passage 3301, for the lubrication and cooling of the first transmission bearing 322 and the second transmission bearing 330.

[0075] Furthermore, in order to achieve the connection between the first housing oil passage 110 on the first housing 100 and the second housing oil passage 201 on the second housing 200, and to avoid repeatedly setting oil inlets on the second housing 200, a first internal oil passage 3201 is arranged inside the third shaft 320 and a second internal oil passage 3301 is arranged inside the fourth shaft 330. The first housing oil passage 110 and the second housing oil passage 201 are connected through the first internal oil passage 3201 and the second internal oil passage 3301, so that the lubricating oil in the first housing oil passage 110 enters the second housing oil passage 201 through the first internal oil passage 3201 and the second internal oil passage 3301 to lubricate the second bearing assembly 313. Meanwhile, by providing a first oil outlet 3202 corresponding to the first transmission bearing 322 on the side wall of the third shaft 320, and by providing a second oil outlet 3302 corresponding to the second transmission bearing 330 on the side wall of the fourth shaft 330, lubricating oil can reach the first transmission bearing 322 through the first oil outlet 3202 and reach the second transmission bearing 330 through the second oil outlet 3302, thereby achieving lubrication and cooling of the two transmission bearings 301b.

[0076] As shown in Figure 2, in some other embodiments, the first housing oil passage 110 may further include a second oil passage 1102, with one end of the first internal oil passage 3201 and the second internal oil passage 3301 respectively connected to the second oil passage 1102; wherein, the two ends of the first internal oil passage 3201 and the second internal oil passage 3301 facing the first housing 100 are respectively connected to the second oil passage 1102.

[0077] The second housing oil passage 201 includes two oil inlets 202 and 203, which are respectively connected to the other end of the first internal oil passage 3201 and the second internal oil passage 3301, and a third oil outlet 204 corresponding to the mounting position of the second bearing assembly 313. This allows the lubricating oil in the second oil passage 1102 of the first housing 100 to be transferred to the second housing oil passage 201 via the first internal oil passage 3201 and the second internal oil passage 3301, and sprayed out from the third oil outlet 204 to lubricate the second bearing assembly 313. The first internal oil passage 3201 and the second internal oil passage 3301 are connected to the first oil inlet 202 and the second oil inlet 203 at their respective ends facing the second housing 200, so that the lubricating oil in the second oil passage 1102 can enter the second housing oil passage 201 through the first internal oil passage 3201 and the second internal oil passage 3301, and be guided to the second bearing assembly 313 for lubrication and cooling by the third oil outlet 204 of the second housing oil passage 201.

[0078] It should be noted that the second housing oil passage 201 can be constructed in any suitable manner, as shown in Figures 4 and 5. The second housing oil passage 201 may include two branch oil passages extending parallel to the third axis 320 and the fourth axis 330, and a connecting oil passage extending perpendicular to the third axis 320 and the fourth axis 330. The two branch oil passages are respectively connected to the connecting oil passage, and the ends of the two branch oil passages away from the connecting oil passage form oil inlet 1 202 and oil inlet 203, respectively. It should be noted that, for the convenience of machining, the connecting oil passage is a straight oil passage, formed by drilling holes in the second housing 200. Therefore, the opposite ends of the connecting oil passage are open. To prevent the lubricating oil in the second housing oil passage 201 from leaking out of the openings, a first sealing member 210 and a second sealing member 220 can be installed at the two openings, so that the lubricating oil can only enter through oil inlet 1 202 and oil inlet 203 and can be sprayed out through the third oil outlet 204.

[0079] In order to enable oil to enter the second oil passage 1102, as shown in FIG2, in some embodiments, the first housing 100 is further provided with a second oil inlet 102 communicating with the second oil passage 1102. That is, the first housing 100 may be provided with a first oil inlet 101 and a second oil inlet 102, and the first oil inlet 101 is used for oil entering the first oil passage 1101, and the second oil inlet 102 is used for oil entering the second oil passage 1102.

[0080] In some other embodiments, the second oil passage 1102 may also be connected to the first oil inlet 101, that is, oil can be supplied to the first oil passage 1101 and the second oil passage 1102 simultaneously through the first oil inlet 101. For example, the first oil passage 1101 and the second oil passage 1102 may be connected to the first oil inlet 101 respectively, or they may be connected through a common oil passage.

[0081] To achieve better lubrication and cooling of the gear assembly 300a, as shown in Figures 2 and 6, in some embodiments, the lubrication conduit 700b includes at least a portion of the bearing assembly 300b and / or a port 701a corresponding to the gear meshing point of the gear assembly 300a, for lubrication of the bearing assembly 300b and the meshing points of each gear assembly 300a. One end of the lubrication conduit 700b may communicate with the housing oil passage 700a, and the other end extends toward the interior of the receiving cavity 500, on which one or more ports 701a may be provided. These ports 701a are used to spray lubricating oil onto the bearing assembly 300b and / or the gear meshing points, thereby achieving lubrication and cooling of at least a portion of the bearing assembly 300b and the gear assembly 300a.

[0082] The lubrication line 700b can be arranged in any suitable manner. It can be connected to the first housing oil passage 110 or the second housing oil passage 700a 201 to introduce lubricating oil. Specifically, one end of the lubrication line 700b can be connected to the first housing oil passage 110 and / or the second housing oil passage 201, and lubrication is achieved by spraying oil through the port 701a therein. As shown in Figure 2, in some embodiments of this disclosure, the lubrication line 700b includes a first pipe 130 connected to the first oil passage 1101. The first pipe 130 includes a first port 131 corresponding to the fourth bearing assembly 343 and used for lubricating the fourth bearing assembly 343. Since the first bearing assembly 312, the third bearing assembly 342, and the second bearing assembly 313 can all be lubricated and cooled through the aforementioned housing oil passage 700a (including the first housing oil passage 110 and the second housing oil passage 201), and the fourth bearing assembly 343 is far from the aforementioned first oil inlet 101 and is located at a higher position near the second housing 200, by arranging the first pipeline 130 and using the first port 131 set on the first pipeline 130 to spray lubricating oil onto the fourth bearing assembly 343, and lubricating and cooling the fourth bearing assembly 343, and in conjunction with the aforementioned housing oil passage 700a, the lubrication of all bearing assemblies 300b is achieved.

[0083] To lubricate the gear meshing points between the gear assemblies 300a, as shown in FIG2, in some embodiments, the first conduit 130 further includes a second port 132 corresponding to the first side of the meshing point between the first drive gear 321 and the output gear 341. By arranging the second port 132 on the first conduit 130, lubricating oil is guided to the first side of the meshing point between the first drive gear 321 and the output gear 341, enabling timely lubrication and cooling, and preventing tooth surface failure.

[0084] In some embodiments, the first conduit 130 further includes a second side corresponding to the meshing point of the first transmission gear 321 and the output gear 341, and a third port 133 corresponding to the first side corresponding to the meshing point of the gear portion 311 and the first transmission gear 321.

[0085] The first pipeline 130 includes a second port 132 and a third port 133 corresponding to the opposite sides (first side and second side) of the meshing point of the first transmission gear 321 and the output gear 341. By arranging the second port 132 and the third port 133 on the first pipeline 130, lubricating oil is guided to both sides of the meshing point of the first transmission gear 321 and the output gear 341. When the first transmission gear 321 and the output gear 341 rotate forward and reverse, lubrication and cooling can be performed in time to avoid tooth surface failure.

[0086] Meanwhile, the third port 133 also corresponds to the first side of the meshing point between the gear part 311 and the first transmission gear 321, and can be used to spray lubricating oil onto the first side of the meshing point between the gear part 311 and the first transmission gear 321 to achieve lubrication and cooling of the meshing surfaces of the two.

[0087] As shown in Figure 2, in some embodiments, the lubrication line 700b further includes a second line 140, which includes a fourth port 141 on the second side corresponding to the meshing point of the gear part 311 and the first transmission gear 321. By providing the second line 140 and arranging the fourth port 141 on the second line 140, lubricating oil is sprayed onto the second side of the meshing point of the gear part 311 and the first transmission gear 321. This, combined with the lubricating oil sprayed onto the first side by the third port 133 of the first line 130, achieves lubrication and cooling of the meshing surfaces when the two rotate in both forward and reverse directions.

[0088] In some embodiments, the second pipeline 140 further includes a fifth port 142 corresponding to the first side of the meshing point of the gear portion 311 and the second transmission gear 331; by arranging the fifth port 142 on the second pipeline 140, lubricating oil is guided to the first side of the meshing point of the second transmission gear 331 and the gear portion 311, which can lubricate and cool the meshing point of the second transmission gear 331 and the gear portion 311 in a timely manner, and avoid tooth surface failure.

[0089] In some embodiments, the second conduit 140 further includes a second side corresponding to the meshing point of the gear section 311 and the second transmission gear 331, and a sixth port 143 corresponding to the first side corresponding to the meshing point of the second transmission gear 331 and the output gear 341. The sixth port 143 can guide lubricating oil to the second side of the meshing point of the gear section 311 and the second transmission gear 331. Combined with the lubricating oil sprayed from the fifth port 142, lubrication and cooling can be performed in a timely manner when the second transmission gear 331 and the gear section 311 rotate forward and in reverse, so as to avoid tooth surface failure.

[0090] Meanwhile, the sixth port 143 can also correspond to the first side of the meshing point of the second transmission gear 331 and the output gear 341, and is used for lubrication of the first side of the meshing point of the second transmission gear 331 and the output gear 341.

[0091] In some embodiments, the second conduit 140 further includes a seventh port 144 corresponding to the opposite sides of the meshing point of the second transmission gear 331 and the output gear 341. Combined with the aforementioned sixth port 143, lubricating oil can be guided to both sides (the first side and the second side) of the meshing point of the second transmission gear 331 and the output gear 341, ensuring timely lubrication and cooling during both forward and reverse rotation of the second transmission gear 331 and the output gear 341, thus preventing tooth surface failure.

[0092] The transmission 10 is typically used in a vehicle 1000, which has multiple driving states, such as forward and reverse. In order to adapt to the multiple states of the vehicle 1000, in some embodiments, the lubrication passage 700 is configured to adjust the amount of oil supplied to the gear assembly 300a and the bearing assembly 300b to adapt to different operating conditions.

[0093] For the transmission 10, when the vehicle 1000 moves forward and backward, it is actually the gears inside the transmission 10 rotating in the forward and reverse directions. Therefore, when considering the layout of the lubrication system, the situation of gear reversal also needs to be considered. Under different operating conditions, the flow rate of lubricating oil required for tooth meshing and bearing rotation is also different. It can be generally considered that the bearing demand is greater at high speed and the tooth meshing demand is greater at high torque. In the embodiments of this disclosure, pipe ports 701a (lubricating oil nozzles) are provided on the first and second sides (opposite sides) in both directions at the meshing points of all tooth surfaces. By adjusting the nozzle diameter of different pipe ports 701a, the diameter of the lubricating oil passage 700, and the diameter of the lubrication pipeline 700b, and by developing a suitable strategy to adjust the oil pump operating state according to the operating conditions when the vehicle 1000 is running, it can be ensured that there is enough lubricating oil flowing through the meshing tooth surfaces and bearings under each operating condition, reducing the failure of the transmission 10 due to insufficient lubricating oil and avoiding risks.

[0094] It should be noted that, as shown in Figure 6, the first housing 100 and / or the second housing 200 may also have an oil return port 103 located at the bottom of the housing. The oil return port 103 can be connected to the oil supply pump 400 that stores lubricating oil through a pipeline, so that the lubricating oil that reaches the bottom of the receiving cavity 500 after lubrication can return to the oil tank 900 through the oil return port.

[0095] Understandably, a control valve capable of opening and closing can also be installed at the oil return port 103. This control valve can be connected to an oil level gauge to open the oil return port 103 when the lubricating oil level in the receiving cavity 500, as detected by the oil level gauge, reaches a preset level, thus achieving oil return. Since the transmission 10 adopts active lubrication, it is no longer necessary to store lubricating oil at the bottom of the receiving cavity 500 for churning lubrication. Of course, if it is necessary to reserve a certain height of lubricating oil at the bottom of the receiving cavity 500 for churning lubrication of some components, this solution is also feasible. It is only necessary to adjust the oil level or return oil by controlling the opening and closing of the oil return port 103 through the control valve.

[0096] Embodiments of this disclosure also provide a wheel-side drive axle assembly 800, as shown in Figures 1 and 7. This wheel-side drive axle assembly 800 includes a motor mount 1 and a half-shaft sleeve 2, and also includes the aforementioned transmission 10. The motor mount 1 forms a first housing 100, the half-shaft sleeve 2 forms a second housing 200, the first shaft 310 can be a motor shaft and serves as an input shaft, and the second shaft 340 of the transmission 10 serves as an output shaft. Therefore, this wheel-side drive axle assembly 800 also possesses all the advantages of the aforementioned transmission 10, enabling better lubrication and cooling of its internal bearing assembly 300b and gear assembly 300a.

[0097] In some embodiments, in order to supply lubricating oil, the wheel-side drive axle assembly 800 may further include an oil supply pump 400. One end of the oil supply pump 400 is connected to an oil tank 900 for storing lubricating oil, and the other end is connected to a lubricating oil passage 700. For example, it may be connected to the first oil inlet 101 and the second oil inlet 102 mentioned above, thereby supplying oil to the housing oil passage 700a and the lubrication pipeline 700b, realizing active lubrication, improving the lubrication and cooling effect of the bearing assembly 300b and the gear assembly 300a, and avoiding the risk of failure of the bearing assembly 300b and the gear surfaces.

[0098] Additionally, it should be noted that the embodiments disclosed herein are merely examples of one oil supply pump 400 corresponding to one wheel-side drive axle assembly 800. As the oil supply pump 400 develops and its performance becomes stronger, since the wheel-side drive system is a symmetrical design, that is, each side of the drive axle has a power system, if the oil pump can meet the total lubrication oil demand of both sides, it is possible to consider sharing one oil supply pump 400 on both sides, symmetrically setting the oil passages, and arranging the oil supply pump 400 on the axle housing. Currently, there is one oil pump on each side, which is arranged on the cantilever respectively.

[0099] In some embodiments, the wheel-side drive axle assembly 800 further includes an oil cooler 801 and / or a filter 802 disposed in the oil passage between the oil supply pump 400 and the lubrication oil passage 700, as shown in FIG7. An oil cooler 801 and a filter 802 are disposed in the oil passage connecting the oil supply pump 400 and the lubrication oil passage 700. The oil cooler 801 is used for cooling the lubricating oil, and the filter 802 is used for filtering the lubricating oil. It is understood that both the oil cooler 801 and the filter 802 can be devices known in the related art, and will not be described in detail here.

[0100] Embodiments of this disclosure also provide a vehicle 1000, which includes the aforementioned transmission 10 or the aforementioned wheel-side drive axle assembly 800. Therefore, the vehicle 1000 also possesses all the advantages of the aforementioned transmission 10 and wheel-side drive axle, which will not be elaborated further here. As shown in FIG8, the vehicle 1000 includes the wheel-side drive axle assembly 800.

[0101] The disclosed transmission 10, wheel-side drive axle assembly 800, and vehicle 1000 are described below. The transmission 10 can be modified from an existing wheel-side reduction main reducer. Therefore, without changing the overall structure of the original wheel-side reduction main reducer assembly, and in conjunction with the manufacturing process, housing oil passages 700a can be arranged in the motor mount 1 and half-shaft sleeve 2 (first housing 100 and second housing 200). For bearings and gear surfaces that cannot be lubricated by the housing oil passages 700a, lubrication can be achieved by using lubrication pipelines 700b with nozzles (orifices 701a) for fixed-point spraying. By calculating the demand at each lubrication point, the operating strategy of the oil pump, the diameter of each lubrication oil passage 700 and lubrication pipeline 700b, and the diameter of each nozzle can be calculated. Combined with a certain safety factor, the system can be checked under characteristic working conditions to achieve the purpose of meeting the lubrication requirements.

[0102] This disclosure adopts an active lubrication method, eliminating the need for gear churning to lubricate all points via splash lubrication within the gearbox 10. The lubricating oil level can be completely below the root circle of all gears. Traditional lubrication schemes using splash lubrication not only increase churning losses in gears and bearings, reducing transmission efficiency, but also cause the lubricating oil to tilt under gravity during vehicle climbing or tilting conditions. This can reduce the effectiveness of gear churning, preventing the lubricating oil from reaching the designed lubrication points, leading to insufficient lubrication and resulting in localized high-temperature erosion or even failure.

[0103] In addition, due to technical reasons, the motor housing and the reducer housing are not currently connected. In future development, it is possible to consider sharing a housing between the motor and the reducer. This would allow them to share a cooling system and eliminate the need for the second oil inlet 102 as disclosed in this disclosure. Only a first oil inlet 101 is required.

[0104] If the process allows, a hole can be made in the first shaft 310, and a through hole can be made on the outside of the shaft to the inside of the shaft, so that the lubricating oil in the housing oil passage 700a can be led to the first bearing assembly 312. In this way, it is no longer necessary to set up a connecting oil passage connecting the third bearing assembly 342 and the first bearing assembly 312, which can simplify the machining difficulty on the housing.

[0105] Traditional wheel-side drive main reducers, due to the lack of a suction device, cannot accommodate lubricating oil filters, heating devices, and oil coolers 801. However, in this disclosure, a coarse filter can be added before the oil pump, with a heater added to the coarse filter, and a fine filter added after the oil pump. An oil cooler 801 is then installed after the fine filter. This achieves the functions of purifying the lubricating oil, preheating the lubricating oil during low-temperature driving, and cooling it through the oil cooler 801 during high-temperature driving. During maintenance, the paper fine filter is replaced, and the steel coarse filter is periodically flushed or replaced. The gears and bearings operate in a cleaner environment and at a suitable temperature, extending the reducer's lifespan.

[0106] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0107] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0108] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

A transmission characterized by The application relates to a transmission mechanism, which comprises: a first shell (100); a second shell (200) connected to the first shell (100) and forming a containing cavity (500) with the first shell (100); a transmission mechanism (300) comprising a gear assembly (300a) and a bearing assembly (300b) arranged inside the containing cavity (500), the gear assembly (300a) being connected to the first shell (100) and the second shell (200) through the bearing assembly (300b); and a lubricating oil channel (600) comprising a shell oil channel (601) arranged in the first shell (100) and / or the second shell (200) and a lubricating pipeline (602) arranged inside the containing cavity (500) and communicating with the shell oil channel (601), the shell oil channel (601) and the lubricating pipeline (602) being used for supplying lubricating oil to the gear assembly (300a) and the bearing assembly (300b) for lubricating and cooling the gear assembly (300a) and the bearing assembly (300b). The transmission according to claim 1, characterized in that The gear assembly (300a) comprises a first shaft (310) with a gear part (311) and a second shaft (340) with an output gear (341) mounted thereon; The bearing assembly (300b) comprises a first bearing assembly (312), a second bearing assembly (313), a third bearing assembly (342) and a fourth bearing assembly (343); One end of the first shaft (310) is connected to the first shell (100) through the first bearing assembly (312), and the other end is connected to the second shell (200) through the second bearing assembly (313); One end of the second shaft (340) is connected to the first shell (100) through the third bearing assembly (342), and the other end is connected to the second shell (200) through the fourth bearing assembly (343); The first shell (100) is provided with a first shell oil channel (110) for lubricating the first bearing assembly (312) and the third bearing assembly (342), and the second shell (200) is provided with a second shell oil channel (201) for lubricating the second bearing assembly (313). The transmission according to claim 2, characterized in that The first shell (100) is provided with a first oil inlet (101), the first shell oil channel (110) comprises a first oil channel (1101) communicating the first oil inlet (101) and a mounting position of the third bearing assembly (342), and a communicating oil channel (1103) communicating a mounting position of the first bearing assembly (312) and a mounting position of the third bearing assembly (342). The transmission according to claim 3, characterized in that The mounting position of the third bearing assembly (342) is above the mounting position of the first bearing assembly (312), and the communicating oil channel (1103) extends in a vertical direction. The transmission according to any one of claims 2-4, characterized in that The gear assembly (300a) comprises at least one transmission gear (301a) transmissionally connected to the gear part (311) and the output gear (341), and at least one transmission shaft (302a) fixedly connected to the first housing (100) and the second housing (200) respectively; the transmission gear (301a) is rotationally connected to the transmission shaft (302a) through a transmission bearing (301b); The transmission shaft (302a) is formed with an internal oil channel (700c) connecting the first housing oil channel (110) and the second housing oil channel (201), so that the lubricating oil of the first housing oil channel (110) flows to the second housing oil channel (201). The transmission according to claim 5, characterized in that The transmission shaft (302a) is formed with an oil outlet communicating with the internal oil channel (700c) and corresponding to the transmission bearing (301b). The transmission according to claim 5 or 6, characterized in that The first housing oil channel (110) further comprises a second oil channel (1102), one end of the internal oil channel (700c) communicating with the second oil channel (1102); The second housing oil channel (201) comprises an oil inlet communicating with the other end of the internal oil channel (700c), and a third oil outlet (204) corresponding to the mounting position of the second bearing assembly (313), so that the lubricating oil of the second oil channel (1102) of the first housing oil channel (110) can be transmitted to the second housing oil channel (201) through the internal oil channel (700c) to lubricate the second bearing assembly (313). The transmission according to any one of claims 5-7, characterized in that The gear assembly (300a) comprises a first transmission gear (321) and a second transmission gear (331) meshing with the gear part (311) and the output gear (341) respectively, and a third shaft (320) and a fourth shaft (330) connected to the first housing (100) and the second housing (200) respectively; The first transmission gear (321) and the second transmission gear (331) are connected to the third shaft (320) and the fourth shaft (330) through a first transmission bearing (322) and a second transmission bearing (332) respectively; The third shaft (320) and the fourth shaft (330) are respectively formed with a first internal oil channel (3201) and a second internal oil channel (3301) connecting the first housing oil channel (110) and the second housing oil channel (201), so that the lubricating oil of the first housing oil channel (110) flows to the second housing oil channel (201); The first internal oil channel (3201) and the second internal oil channel (3301) are respectively formed with a first oil outlet (3202) and a second oil outlet (3302) corresponding to the first transmission bearing (322) and the second transmission bearing (332). The transmission according to claim 8, characterized in that The first housing oil channel (110) further comprises a second oil channel (1102), one end of the first internal oil channel (3201) and the second internal oil channel (3301) respectively communicating with the second oil channel (1102); The second housing oil passage (201) comprises two oil inlets (202) and (203) respectively communicating with the other ends of the first internal oil passage (3201) and the second internal oil passage (3301), and a third oil outlet (204) corresponding to the mounting position of the second bearing assembly (313), so that the lubricating oil in the second oil passage (1102) of the first housing (100) can be transmitted to the second housing oil passage (201) through the first internal oil passage (3201) and the second internal oil passage (3301) to lubricate the second bearing assembly (313). The transmission according to claim 9, characterized in that The first housing (100) is provided with a second oil inlet (102) communicating with the second oil passage (1102); or The second oil passage (1102) communicates with the first oil inlet (101) of the first housing (100). The transmission according to any one of claims 8-10, characterized in that The lubricating pipeline (602) comprises at least part of the bearing assembly (300b) and / or a pipe opening (701a) corresponding to the gear meshing position of the gear assembly (300a), for lubricating the bearing assembly (300b) and the gear assembly (300a). The transmission according to claim 11, characterized in that The lubricating pipeline (602) comprises a first pipeline (130) communicating with the first oil passage (1101) of the first housing (100), and the first pipeline (130) comprises a first pipe opening (131) corresponding to the fourth bearing assembly (343) and used for lubricating the fourth bearing assembly (343). The transmission according to claim 12, characterized in that The first pipeline (130) further comprises a second pipe opening (132) corresponding to the first side of the meshing position of the first transmission gear (321) and the output gear (341); and / or The first pipeline (130) further comprises a third pipe opening (133) corresponding to the second side of the meshing position of the first transmission gear (321) and the output gear (341), and the first side of the meshing position of the gear part (311) and the first transmission gear (321). The transmission according to any one of claims 11-13, characterized in that The lubricating pipeline further comprises a second pipeline (140), and the second pipeline (140) comprises a fourth pipe opening (141) corresponding to the second side of the meshing position of the gear part (311) and the first transmission gear (321); and / or The second pipeline (140) further comprises a fifth pipe opening (142) corresponding to the first side of the meshing position of the gear part (311) and the second transmission gear (331); and / or The second pipeline (140) further comprises a sixth pipe opening (143) corresponding to the second side of the meshing position of the gear part (311) and the second transmission gear (331), and the first side of the meshing position of the second transmission gear (331) and the output gear (341); and / or The second pipeline (140) further comprises a seventh pipe opening (144) corresponding to the second side of the meshing position of the second transmission gear (331) and the output gear (341). The transmission according to any one of claims 1-14, characterized in that The lubricating oil channel (600) is configured to adjust the amount of oil supplied to the gear assembly (300a) and the bearing assembly (300b) to adapt to different working conditions. A wheel drive axle assembly comprising a motor housing (1) and a half shaft sleeve (2), characterized in that, The wheel drive axle assembly (800) further comprises the transmission (10) according to any one of claims 1-15. The motor seat (1) forms the first housing (100), and the half shaft sleeve (2) forms the second housing (200). The wheel drive axle assembly of claim 16, wherein The wheel drive axle assembly (800) further comprises an oil supply pump (400), one end of the oil supply pump (400) being connected to an oil tank (900), and the other end being connected to the lubricating oil channel (700). The wheel drive axle assembly of claim 17, wherein The wheel drive axle assembly (800) further comprises an oil cooler (801) and / or a filter (802) arranged in an oil circuit between the oil supply pump (400) and the lubricating oil channel (700). A vehicle characterized by comprising: The vehicle comprises the transmission (10) according to any one of claims 1-15 or the wheel drive axle assembly (800) according to any one of claims 16-18.

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