Differential and vehicle thereof

Abstract

The application relates to the field of differentials, and particularly discloses a differential and a vehicle thereof. The differential comprises a planetary shaft, a sealed oil tank and a lubricating mechanism. The planetary shaft is radially installed on a shell. Both ends of the planetary shaft are provided with rotatably connected planetary gears. The planetary gears are in mesh with two sun gears. The sealed oil tank stores lubricating oil used for oil bath of a differential main body. The differential main body is arranged in the sealed oil tank. An output half shaft and an input shaft both extend out of the sealed oil tank. The lubricating mechanism is arranged in the sealed oil tank. The shell is used for driving the lubricating mechanism to deliver the lubricating oil at the bottom of the sealed oil tank to a central part of the differential main body. The differential is not prone to ablation and other damages due to lack of lubricating oil.

Description

Technical Field

[0001] This application relates to the field of differentials, and more particularly to a differential and a vehicle thereof. Background Technology

[0002] Currently, the differential is one of the core components of new energy electric drive systems. Whether in HEV or EV, the differential is indispensable, playing the role of inter-wheel differential and meeting the vehicle's turning conditions.

[0003] In related technologies, the differential is mainly composed of main and driven gears, differential housing, planetary gears, half-shaft gears, planetary gear shafts and other major components. During vehicle operation, the main and driven gears, differential housing, planetary gears, half-shaft gears, planetary gear shafts and other major components will rotate at high speed. In order to make the rotation smoother and to prevent wear between parts, the entire differential is immersed in lubricating oil.

[0004] The aforementioned technologies have the following drawbacks: at high gear speeds, lubricating oil is easily thrown off and cannot enter the differential, or the amount splashed into the differential is relatively small, resulting in high temperatures of the components inside the differential and causing burning. Summary of the Invention

[0005] In order to prevent damage such as burning from the inside of the differential due to lack of lubrication, this application provides a differential and the vehicle thereof.

[0006] The first aspect of this application provides a differential and a vehicle thereof, which adopts the following technical solution:

[0007] A differential includes a differential body, the differential body comprising a housing, a coaxial side bevel gear provided on the side wall of the housing, a vertically meshing input gear provided on the side of the side bevel gear, and an input shaft provided on the input gear; both ends of the housing are provided with coaxial output half-shafts, and each of the two output half-shafts has a sun gear at its opposite end; the differential also includes a planetary shaft, a sealing oil tank, and a lubrication mechanism; the planetary shaft is radially mounted on the housing, and both ends of the planetary shaft are provided with rotatably connected planetary gears, which mesh with the two sun gears;

[0008] The sealed oil tank stores lubricating oil for oil bathing the differential body; the differential body is located inside the sealed oil tank, and both the output half-shaft and the input shaft extend out of the sealed oil tank.

[0009] The lubrication mechanism is installed inside the sealed oil tank, and the housing is used to drive the lubrication mechanism to deliver the lubricating oil from the bottom of the sealed oil tank to the center of the differential body.

[0010] By adopting the above technical solution, the input shaft is connected to the engine via the gearbox, and the two output half-shafts are respectively connected to the wheel axles on the corresponding sides of the vehicle. A sealed oil tank is filled with lubricating oil for bathing the differential body. During differential operation, under centrifugal force, the lubricating oil inside the differential is thrown outwards, resulting in insufficient lubrication in the central part of the differential. Simultaneously, the input gear drives the housing to rotate via the side bevel gear, which in turn powers the lubrication mechanism to deliver lubricating oil from the bottom of the sealed oil tank to the central part of the differential body. This ensures that the central part of the differential body does not suffer damage such as burning due to insufficient lubrication during vehicle operation.

[0011] Optionally, the lubrication mechanism includes an oil-taking gear, an annular transfer oil pipe, and a gear pump. The oil-taking gear is coaxially mounted on the housing. The annular transfer oil pipe is coaxially sleeved on the oil-taking gear and connected to the sealed oil tank. The teeth of the oil-taking gear extend into the inside of the annular transfer oil pipe, and there is a dynamic sealing connection between the oil-taking gear and the annular transfer oil pipe.

[0012] The oil-taking gear has an annular oil cavity inside, which includes an oil-taking part and an oil-discharging part that are connected to each other. The oil-taking part is located on the side close to the inner wall of the sealed oil tank, and the oil-taking part has an oil-taking hole that is connected to the annular transfer oil pipe.

[0013] The oil outlet is located on the side close to the center of the differential body; the planetary shaft is provided with an axially arranged oil pipe, and the oil pipe between the two planetary gears is provided with an oil injection hole; both ends of the oil pipe are connected to the oil outlet with a first oil outlet pipe;

[0014] The gear pump is installed at the oil inlet end of the annular transfer oil pipe and is used to deliver lubricating oil from the sealed oil tank into the annular transfer oil pipe; the drive end of the gear pump is provided with a driven gear that meshes with the oil taking gear.

[0015] By adopting the above technical solution, when the housing rotates, the housing drives the oil-taking gear to rotate, which in turn drives the driven gear to rotate. The driven gear then drives the gear pump to operate, and the gear pump delivers the lubricating oil from the sealed oil tank into the annular transfer oil pipe. The lubricating oil in the annular transfer oil pipe enters the oil-taking section through the oil-taking hole, then flows to the oil-outlet section, then flows into the oil pipe through the first oil-outlet pipe, and finally is sprayed out through the oil-spraying hole to replenish the lubricating oil in the central part of the differential body.

[0016] Optionally, the oil sampling holes are multiple, and the multiple oil sampling holes are distributed along the circumference of the oil sampling gear.

[0017] By adopting the above technical solution, the lubricating oil in the annular transfer oil pipe can smoothly enter the oil intake section.

[0018] Optionally, the oil-collecting section is provided with a plurality of oil-collecting scrapers evenly distributed along the circumference of the oil-collecting gear;

[0019] The oil scraper is offset from the oil hole, and the oil scraper is arranged along the radial direction of the oil gear.

[0020] Optionally, the oil scraper is also inclined along the circumference of the oil-collecting gear.

[0021] By adopting the above technical solution, when the oil-taking gear rotates, the oil-taking scraper scrapes the lubricating oil in the annular transfer oil pipe toward the oil-taking hole, which facilitates the lubricating oil in the annular transfer oil pipe to enter the oil-taking part more smoothly.

[0022] Optionally, the fuel injection holes are multiple, and the multiple fuel injection holes are distributed in a spherical pattern with the center point of the planetary axis as the center.

[0023] By adopting the above technical solution, it is convenient for the oil injection hole to spray lubricating oil to various parts inside the differential body.

[0024] Optionally, the gear pump has a vertically arranged suction pipe at the suction end, and the suction end of the suction pipe is connected to multiple annular mesh tubes. The annular mesh tubes are coaxial with the sealing oil tank and are arranged close to the inner wall of the sealing oil tank.

[0025] Multiple of the aforementioned annular mesh tubes are distributed along the axial direction of the housing.

[0026] By adopting the above technical solution, the oil suction pipe is used to draw oil from the suction end of the gear pump. Due to the centrifugal force during differential operation, the lubricating oil in the center of the differential body is thrown towards the circumferential inner wall of the sealed oil tank. Therefore, by using an annular mesh tube that fits against the circumferential inner wall of the sealed oil tank as the oil inlet end of the oil suction pipe, the oil suction range of the oil suction pipe is expanded, allowing the effective oil suction area of ​​the oil suction pipe to be increased.

[0027] Optionally, the sealing oil tank and the housing are both dynamically sealed to the output half-shaft;

[0028] The input shaft is dynamically sealed to the sealing oil tank.

[0029] By adopting the above technical solutions, oil leakage between the sealed oil tank, the housing and the output half shaft can be avoided, as can oil leakage between the input shaft and the sealed oil tank.

[0030] Optionally, a first annular oil groove is provided coaxially between the planetary gear and the planetary shaft, and an oil injection hole is provided on the oil pipe that communicates with the first annular oil groove.

[0031] A second annular oil groove is provided between the output half-shaft and the housing;

[0032] A third annular oil groove is provided between the output half-shaft and the sealing oil tank;

[0033] A fourth annular oil groove is provided between the input shaft and the sealing oil tank;

[0034] The oil outlet is connected to the second annular oil groove, the third annular oil groove, and the fourth annular oil groove.

[0035] By adopting the above technical solution, the rotating connection parts of the planetary gear, output half shaft, input shaft and other components are lubricated to ensure smooth rotation of the planetary gear, output half shaft and input shaft.

[0036] A vehicle comprising any of the differentials described above.

[0037] By adopting the above technical solution, the vehicle is less likely to malfunction due to lack of lubrication in the center of the differential during driving, which is beneficial to driving safety.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. In conventional differentials, under the action of centrifugal force, the lubricating oil inside the differential is thrown outward, resulting in insufficient lubrication in the central part of the differential. In this application, while the differential body is running, the input gear can drive the housing to rotate through the side bevel gear, thereby enabling the housing to act as a power source to drive the lubrication mechanism to deliver the lubricating oil at the bottom of the sealed oil tank to the central part of the differential body. During vehicle operation, this ensures that the central part of the differential body will not suffer damage such as burning due to insufficient lubrication.

[0040] 2. By using the housing as a power source to drive the lubrication mechanism, when the housing rotates, it drives the oil-taking gear to rotate, which in turn drives the driven gear to rotate. The driven gear then drives the gear pump, which delivers the lubricating oil from the sealed oil tank into the annular transfer oil pipe. The lubricating oil in the annular transfer oil pipe enters the oil-taking section through the oil-taking hole, then flows to the oil-outlet section, then flows into the oil pipe through the first oil-outlet pipe, and finally is sprayed out through the oil-spraying hole to replenish the lubricating oil in the central part of the differential body.

[0041] 3. By setting an oil scraper that is inclined along the circumference of the oil-taking gear, when the oil-taking gear rotates, the oil scraper scrapes the lubricating oil in the annular transfer oil pipe toward the oil-taking hole, so that the lubricating oil in the annular transfer oil pipe can enter the oil-taking part more smoothly.

[0042] 4. By setting up a first annular oil groove, a second annular oil groove, a third annular oil groove, and a fourth annular oil groove that are connected to the oil outlet, the rotating connection parts of the planetary gear, output half shaft, input shaft, and other components can be lubricated to ensure smooth rotation of the planetary gear, output half shaft, and input shaft. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0045] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application;

[0046] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle;

[0047] Figure 4 yes Figure 2 Enlarged schematic diagram of part B.

[0048] Figure label:

[0049] 1. Differential body; 11. Housing; 12. Side bevel gear; 13. Planetary shaft; 1301. Oil pipe; 1302. First annular oil groove; 1303. Oil inlet; 1304. Oil injection hole; 130. Planetary gear; 14. Output half shaft; 1401. Second annular oil groove; 1402. Third annular oil groove; 140. Sun gear; 15. Input shaft; 1501. Fourth annular oil groove; 150. Input gear 2. Sealed oil tank; 3. Lubrication mechanism; 31. Oil taking gear; 311. Annular oil chamber; 31101. Oil taking part; 31102. Oil outlet part; 312. Oil taking hole; 313. Oil taking scraper; 32. Annular transfer oil pipe; 321. Oil suction pipe; 323. Annular mesh pipe; 33. Driven gear; 34. Gear pump; 35. First oil outlet pipe; 36. Second oil outlet pipe; 37. Third oil outlet pipe; 38. Fourth oil outlet pipe. Detailed Implementation

[0050] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0051] This application discloses a differential and a vehicle thereof.

[0052] Reference Figure 1 and Figure 2 The differential includes a differential body 1, a sealed oil tank 2, and a lubrication mechanism 3. The differential body 1 is located inside the sealed oil tank 2, and both the input and output ends of the differential body 1 are rotatably connected to the sealed oil tank 2, and are also dynamically sealed to it. The bottom of the sealed oil tank 2 stores lubricating oil. The lubrication mechanism 3 is located inside the sealed oil tank 2 and is used to deliver the lubricating oil from the bottom of the sealed oil tank 2 to the various parts of the differential body 1 that require lubrication.

[0053] Reference Figure 2 , Figure 3 and Figure 4 Specifically, the differential body 1 includes a housing 11, a side bevel gear 12, a planetary shaft 13, a planetary gear 130, an output half shaft 14, a sun gear 140, an input shaft 15, and an input gear 150. The side wall of the housing 11 is provided with a coaxial side bevel gear 12, and the side of the side bevel gear 12 is provided with a vertically meshing input gear 150. The input gear 150 is provided with a coaxial input shaft 15, which extends out of the sealing oil tank 2 and is dynamically sealed to the sealing oil tank 2.

[0054] Reference Figure 2 , Figure 3 and Figure 4 The housing 11 is provided with a planetary shaft 13 arranged along the diameter direction of the side bevel gear 12, and the planetary shaft 13 is fixedly mounted on the housing 11. Both ends of the planetary shaft 13 are provided with planetary gears 130 that are rotatably connected, and the two planetary gears 130 are symmetrically arranged along the axial direction of the side bevel gear 12.

[0055] Reference Figure 2 , Figure 3 and Figure 4 Both ends of the housing 11 are provided with coaxial output half shafts 14. The opposite ends of the two output half shafts 14 extend out of the sealing oil tank 2 and are dynamically sealed to the sealing oil tank 2. The opposite ends of the two output half shafts 14 are provided with sun gears 140, and the two sun gears 140 mesh with two planetary gears 130.

[0056] Reference Figure 2 , Figure 3 and Figure 4In this embodiment, the input shaft 15 is connected to the engine via a gearbox, and the two output half-shafts 14 are respectively connected to the wheel axles on the corresponding sides of the vehicle. The engine drives the input shaft 15 to rotate, which in turn drives the side bevel gear 12 to rotate. The side bevel gear 12 drives the housing 11 to rotate, and the housing 11 drives the planetary gear 130 to rotate. When the vehicle is traveling in a straight line, the planetary gear 130 rigidly pushes the two sun gears 140 to rotate synchronously. When the vehicle is turning, the wheels on both sides rotate at different speeds. At this time, the planetary gear 130 rolls on the sun gear 140, allowing the two sun gears 140 to generate a speed difference.

[0057] Reference Figure 2 , Figure 3 and Figure 4 Specifically, the planetary shaft 13 is provided with a coaxial oil pipe 1301, and a coaxial first annular oil groove 1302 is provided between the planetary gear 130 and the planetary shaft 13. The first annular oil groove 1302 is provided on the planetary gear 130 and / or the planetary shaft 13, and the oil pipe 1301 is provided with an oil injection hole 1303 communicating with the first annular oil groove 1302. The oil pipe 1301 between the two planetary gears 130 is provided with a plurality of oil injection holes 1304, which are distributed in a spherical shape with the center point of the planetary shaft 13 as the center.

[0058] Reference Figure 2 , Figure 3 and Figure 4 A second annular oil groove 1401 is provided between the output half shaft 14 and the housing 11. The second annular oil groove 1401 is provided on the output half shaft 14 and / or the housing 11.

[0059] Reference Figure 2 , Figure 3 and Figure 4 A third annular oil groove 1402 is provided between the output half-shaft 14 and the sealing oil tank 2. The third annular oil groove 1402 is provided on the output half-shaft 14 and / or the sealing oil tank 2.

[0060] Reference Figure 2 , Figure 3 and Figure 4 A fourth annular oil groove 1501 is provided between the input shaft 15 and the sealing oil tank 2. The fourth annular oil groove 1501 is provided on the input shaft 15 and / or the sealing oil tank 2.

[0061] Reference Figure 2 , Figure 3 and Figure 4 The lubrication mechanism 3 is used to deliver the lubricating oil at the bottom of the sealed oil tank 2 to the oil pipe 1301, the second annular oil groove 1401, and the fourth annular oil groove 1501.

[0062] Reference Figure 2 , Figure 3 and Figure 4 In this embodiment, the lubricating oil at the bottom of the sealed oil tank 2 is transported to the oil pipe 1301, the second annular oil groove 1401, the third annular oil groove 1402, and the fourth annular oil groove 1501 through the lubrication mechanism 3. A portion of the lubricating oil in the oil pipe 1301 is injected into the first annular oil groove 1302 through the oil injection hole 1303 to lubricate the part between the planetary gear 130 and the planetary shaft 13. Another portion of the lubricating oil is sprayed out through the oil spray hole 1304. The oil spray hole 1304 sprays lubricating oil outward in a spherical diverging posture from the center of the differential body 1, so that the center of the differential body 1 can be continuously lubricated and cooled by the lubricating oil. Even if the lubricating oil soaked in the gear part of the differential body 1 separates from the gear due to the centrifugal force in the middle of the differential body 1 during operation, the lubricating oil sprayed outward from the center of the differential body 1 can still lubricate the differential body 1 from the inside out, avoiding damage such as burning due to lack of effective lubrication and cooling of the gears caused by centrifugal force.

[0063] Reference Figure 2 , Figure 3 and Figure 4 Specifically, the lubrication mechanism 3 includes an oil-taking gear 31, an annular transfer oil pipe 32, a driven gear 33, a gear pump 34, a first oil outlet pipe 35, a second oil outlet pipe 36, a third oil outlet pipe 37, a fourth oil outlet pipe 38, and a fifth oil outlet pipe 1301. The oil-taking gear 31 is coaxially mounted on the housing 11.

[0064] Reference Figure 2 , Figure 3 and Figure 4 An annular transfer oil pipe 32 is coaxially sleeved on the oil-taking gear 31, and the annular transfer oil pipe 32 is connected to the sealed oil tank 2. The teeth of the oil-taking gear 31 extend into the inner side of the annular transfer oil pipe 32, and there is a dynamic sealing connection between the oil-taking gear 31 and the annular transfer oil pipe 32.

[0065] Reference Figure 2 , Figure 3 and Figure 4 The oil intake gear 31 is provided with a coaxial annular oil chamber 311. The annular oil chamber 311 includes an oil intake part 31101 and an oil outlet part 31102 that are connected to each other. The oil intake part (31101) is located on the side close to the inner wall of the sealed oil tank (2), and the oil outlet part (31102) is located on the side close to the center of the differential body (1).

[0066] Reference Figure 2 , Figure 3 and Figure 4The oil-collecting part 31101 is provided with a plurality of oil-collecting holes 312 and a plurality of oil-collecting scrapers 313 evenly distributed along the circumference of the oil-collecting gear 31. The oil-collecting scrapers 313 are arranged along the radial direction of the oil-collecting gear 31, and the inclination direction of the oil-collecting scrapers 313 is the same as the rotation direction of the oil-collecting gear 31 when the vehicle is moving forward. When the oil-collecting gear 31 rotates at high speed along with the housing 11, lubricating oil is not easy to enter the oil-collecting holes 312. The function of the oil-collecting scrapers 313 is to scrape the lubricating oil in the sealed oil tank 2 toward the oil-collecting holes 312, so that the lubricating oil can flow smoothly into the oil-collecting holes 312. At the same time, they can also act as reinforcing ribs to enhance the strength of the oil-collecting gear 31.

[0067] Reference Figure 2 , Figure 3 and Figure 4 Both ends of the oil outlet 31102 and the oil pipe 1301 are connected to a first oil outlet pipe 35. The lubricating oil in the oil outlet 31102 is input into the oil pipe 1301 through the first oil outlet pipe 35, and then discharged through the oil injection hole 1303 and the oil spray hole 1304. The oil injection hole 1303 injects lubricating oil into the first annular oil groove 1302 to lubricate the planetary shaft 13 and the planetary gear 130. Multiple oil spray holes 1304 spray lubricating oil in a spherical diverging state, and the lubricating oil is sprayed onto the planetary gear 130 and the sun gear 140 to lubricate the planetary gear 130 and the sun gear 140.

[0068] Reference Figure 2 , Figure 3 and Figure 4 A second oil outlet pipe 36 located inside the side bevel gear 12 is connected between the oil outlet 31102 and the second annular oil groove 1401. The lubricating oil in the oil outlet 31102 is input into the second annular oil groove 1401 through the second oil outlet pipe 36 to lubricate the output half shaft 14 and the housing 11.

[0069] Reference Figure 2 , Figure 3 and Figure 4 A third oil outlet pipe 37 located inside the side bevel gear 12 is connected between the oil outlet 31102 and the third annular oil groove 1402. The lubricating oil in the oil outlet 31102 is input into the third annular oil groove 1402 through the third oil outlet pipe 37 to lubricate the output half shaft 14 and the sealed oil tank 2.

[0070] Reference Figure 2 , Figure 3 and Figure 4 A fourth oil outlet pipe 38 is connected between the annular transfer oil pipe 32 and the fourth annular oil groove 1501. The lubricating oil in the annular transfer oil pipe 32 is input into the fourth annular oil groove 1501 through the fourth oil outlet pipe 38, and then lubricates the input shaft 15 and the sealing oil tank 2.

[0071] Reference Figure 2 , Figure 3 and Figure 4 The bottom end of the annular transfer oil pipe 32 is provided with a vertically arranged suction pipe 321. The oil inlet end of the suction pipe 321 is connected to multiple annular mesh pipes 323. The annular mesh pipes 323 are coaxial with the sealing oil tank 2 and are arranged close to the inner wall of the sealing oil tank 2. The multiple annular mesh pipes 323 are distributed along the axial direction of the housing 11.

[0072] Reference Figure 2 , Figure 3 and Figure 4 The oil outlet end of the oil suction pipe 321 is equipped with a gear pump 34 installed in the sealed oil tank 2, and the drive shaft of the gear pump 34 is equipped with a driven gear 33 that meshes with the oil taking gear 31.

[0073] In this embodiment, the sealed oil tank 2 stores an appropriate amount of lubricating oil at its bottom, the amount of which is similar to that of the conventional oil bath lubrication method for differentials. When the input gear 150 drives the side bevel gear 12 to rotate, the housing 11 drives the oil-taking gear 31 to rotate, which in turn drives the driven gear 33 to rotate. The driven gear 33 drives the gear pump 34 to operate, transporting the lubricating oil at the bottom of the sealed oil tank 2 to the annular transfer oil pipe 32. After being transported by the oil-taking gear 31 to the first oil outlet pipe 35, the second oil outlet pipe 36, the third oil outlet pipe 37, and the fourth oil outlet pipe 38, lubricating oil is injected into the first annular oil groove 1302, the second annular oil groove 1401, the third annular oil groove 1402, the fourth annular oil groove 1501, and the planetary gear 130 and the sun gear 140, thereby achieving effective lubrication of various parts of the differential body 1. In this process, due to the centrifugal force acting on the differential body 1 during operation, the lubricating oil in the center of the differential body 1 will be thrown towards the circumferential inner wall of the sealed oil tank 2. Therefore, by using the annular mesh tube 323 that is attached to the circumferential inner wall of the sealed oil tank 2 as the oil inlet end of the oil suction pipe 321, the oil suction range of the oil suction pipe 321 can be increased, thereby increasing the effective oil suction area of ​​the oil suction pipe 321.

[0074] A vehicle comprising any of the differentials described above.

[0075] In the embodiments of this application, the vehicle is less likely to malfunction due to lack of lubrication in the center of the differential during driving, which is beneficial to driving safety.

[0076] The implementation principle of a differential in this application embodiment is as follows:

[0077] The sealed oil tank 2 stores an appropriate amount of lubricating oil at its bottom, with the amount of lubricating oil referring to the amount of oil used in the conventional oil bath lubrication method of differentials. When the input gear 150 drives the side bevel gear 12 to rotate, the housing 11 drives the oil-taking gear 31 to rotate, which in turn drives the driven gear 33 to rotate. The driven gear 33 drives the gear pump 34 to operate, transporting the lubricating oil at the bottom of the sealed oil tank 2 to the annular transfer oil pipe 32. After being transported by the oil-taking gear 31 to the first oil outlet pipe 35, the second oil outlet pipe 36, the third oil outlet pipe 37, and the fourth oil outlet pipe 38, lubricating oil is injected into the first annular oil groove 1302, the second annular oil groove 1401, the third annular oil groove 1402, the fourth annular oil groove 1501, and the fourth annular oil groove 1501, as well as sprayed onto the planetary gear 130 and the sun gear 140, thereby achieving effective lubrication of various parts of the differential body 1.

[0078] In this process, due to the centrifugal force acting on the differential body 1 during operation, the lubricating oil in the center of the differential body 1 will be thrown towards the circumferential inner wall of the sealed oil tank 2. Therefore, by using the annular mesh tube 323 that is attached to the circumferential inner wall of the sealed oil tank 2 as the oil inlet end of the oil suction pipe 321, the oil suction range of the oil suction pipe 321 can be increased, thereby increasing the effective oil suction area of ​​the oil suction pipe 321.

[0079] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0080] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A differential, comprising a differential body (1), the differential body (1) comprising a housing (11), a coaxial side bevel gear (12) provided on the side wall of the housing (11), a vertically meshing input gear (150) provided on the side of the side bevel gear (12), and an input shaft (15) provided on the input gear (150); both ends of the housing (11) are provided with coaxial output half-shafts (14), and each of the two output half-shafts (14) is provided with a sun gear (140) at one opposite end, characterized in that: It also includes a planetary shaft (13), a sealed oil tank (2) and a lubrication mechanism (3). The planetary shaft (13) is radially mounted on the housing (11). Both ends of the planetary shaft (13) are provided with planetary gears (130) that are rotatably connected. The planetary gears (130) mesh with the two sun gears (140). The sealed oil tank (2) stores lubricating oil for oil bathing the differential body (1); the differential body (1) is located inside the sealed oil tank (2), and the output half shaft (14) and the input shaft (15) both extend out of the sealed oil tank (2). The lubrication mechanism (3) is installed inside the sealed oil tank (2), and the housing (11) is used to drive the lubrication mechanism (3) to deliver the lubricating oil at the bottom of the sealed oil tank (2) to the center of the differential body (1); The lubrication mechanism (3) includes an oil-taking gear (31), an annular transfer oil pipe (32), and a gear pump (34). The oil-taking gear (31) is coaxially mounted on the housing (11). The annular transfer oil pipe (32) is coaxially sleeved on the oil-taking gear (31) and is connected to the sealed oil tank (2). The teeth of the oil-taking gear (31) extend into the inside of the annular transfer oil pipe (32), and there is a dynamic seal connection between the oil-taking gear (31) and the annular transfer oil pipe (32). The oil-taking gear (31) has an annular oil cavity (311) inside. The annular oil cavity (311) includes an oil-taking part (31101) and an oil-discharging part (31102) that are connected to each other. The oil-taking part (31101) is located on the side close to the inner wall of the sealed oil tank (2), and the oil-taking part (31101) is provided with an oil-taking hole (312) that is connected to the annular transfer oil pipe (32). The oil outlet (31102) is located on one side near the center of the differential body (1); the planetary shaft (13) is provided with an axially arranged oil pipe (1301), and the oil pipe (1301) between the two planetary gears (130) is provided with an oil injection hole (1304); both ends of the oil pipe (1301) are connected to the oil outlet (31102) with a first oil outlet pipe (35); The gear pump (34) is installed at the oil inlet end of the annular transfer oil pipe (32) to deliver the lubricating oil in the sealed oil tank (2) into the annular transfer oil pipe (32); the drive end of the gear pump (34) is provided with a driven gear (33) that meshes with the oil taking gear (31). The planetary gear (130) and the planetary shaft (13) are provided with a first annular oil groove (1302) on the same axis, and the oil pipe (1301) is provided with an oil injection hole (1303) that communicates with the first annular oil groove (1302). A second annular oil groove (1401) is provided between the output half shaft (14) and the housing (11). A third annular oil groove (1402) is provided between the output half shaft (14) and the sealing oil tank (2). A fourth annular oil groove (1501) is provided between the input shaft (15) and the sealing oil tank (2). The oil outlet (31102) is connected to the second annular oil groove (1401), the third annular oil groove (1402) and the fourth annular oil groove (1501).

2. A differential according to claim 1, characterized in that: The oil extraction holes (312) are multiple, and the multiple oil extraction holes (312) are distributed along the circumference of the oil extraction gear (31).

3. A differential according to claim 2, characterized in that: The oil extraction section (31101) is provided with a plurality of oil extraction scrapers (313) evenly distributed along the circumference of the oil extraction gear (31). The oil scraper (313) is offset from the oil hole (312), and the oil scraper (313) is arranged along the radial direction of the oil gear (31).

4. A differential according to claim 3, characterized in that: The oil scraper (313) is also inclined along the circumference of the oil-collecting gear (31).

5. A differential according to claim 1, characterized in that: The oil injection holes (1304) are multiple, and the multiple oil injection holes (1304) are distributed in a spherical shape with the center point of the planetary axis (13) as the center.

6. A differential according to claim 1, characterized in that: The gear pump (34) has a vertically arranged oil suction pipe (321) at the oil suction end. The oil suction end of the oil suction pipe (321) is connected to a plurality of annular mesh pipes (323). The annular mesh pipes (323) are coaxial with the sealed oil tank (2) and are arranged close to the inner wall of the sealed oil tank (2). Multiple of the ring-shaped mesh tubes (323) are distributed along the axial direction of the housing (11).

7. A differential according to claim 1, characterized in that: The sealed oil tank (2) and the housing (11) are both dynamically sealed to the output half shaft (14); The input shaft (15) is dynamically sealed to the sealing oil tank (2).

8. A vehicle, characterized in that: Includes the differential as described in any one of claims 1-7.

Images