Differential mechanism and vehicle with same

Abstract

The invention relates to the field of differential mechanisms, and particularly discloses a differential mechanism and a vehicle with the differential mechanism, the differential mechanism comprises a planet shaft, a sealing oil tank and a lubricating mechanism, the planet shaft is radially installed on a shell, the two ends of the planet shaft are each provided with a rotationally-connected planet gear, and the planet gears are meshed with two sun gears; lubricating oil used for conducting oil bath on the differential mechanism body is stored in the sealing oil tank. The differential main body is arranged in the sealed oil tank, and the output half shaft and the input shaft extend out of the sealed oil tank; the lubricating mechanism is mounted in the sealed oil tank, and the shell is used for driving the lubricating mechanism to convey lubricating oil at the bottom of the sealed oil tank to the center of the differential body. The interior of the differential mechanism is not prone to damage such as ablation caused by lack of lubricating oil.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of differential, in particular to a differential and a vehicle thereof. BACKGROUND

[0002] At present, the differential is one of the core components of the new energy electric drive system, and is indispensable on the HEV and EV, plays a role in differential between wheels, and meets the turning working condition of the vehicle.

[0003] In the related art, the differential mainly consists of main reduction driven gear, differential housing, planetary gear, half shaft gear, planetary gear shaft and other main components. During the operation of the vehicle, the main reduction driven gear, differential housing, planetary gear, half shaft gear and planetary gear shaft rotate at high speed. In order to make the rotation more smooth and to prevent the parts from being easily worn, the differential is immersed in lubricating oil.

[0004] For the related art in the above, the following defects exist: at high speed of the gear, the lubricating oil is easily thrown out and cannot enter the inside of the differential or the amount of splashing into the differential is relatively small, thereby causing the temperature of the parts in the differential to be high and the ablation phenomenon to occur. SUMMARY

[0005] In order to prevent the inside of the differential from being damaged by lack of lubricating oil and ablation, the present application provides a differential and a vehicle thereof.

[0006] The first aspect of the present application provides a differential and a vehicle thereof, which adopts the following technical scheme: A differential, comprising a differential main body, the differential main body comprising a housing, a side wall of the housing being provided with a coaxial side face bevel gear, a side of the side face bevel gear being provided with a vertically meshing input gear, the input gear being provided with an input shaft; both ends of the housing being provided with coaxial output half shafts, opposite ends of the two output half shafts being provided with sun gears, further comprising a planetary shaft, a sealed oil tank and a lubricating mechanism, the planetary shaft being radially installed on the housing, both ends of the planetary shaft being provided with rotatably connected planetary gears, the planetary gears being meshed with the two sun gears; the sealed oil tank storing lubricating oil for oil bath of the differential main body; the differential main body being arranged inside the sealed oil tank, and the output half shafts and the input shaft both extending out of the sealed oil tank; the lubricating mechanism being installed inside the sealed oil tank, the housing being used to drive the lubricating mechanism to deliver the lubricating oil at the bottom of the sealed oil tank to the central part of the differential main body.

[0007] By adopting the technical scheme, the input shaft is connected to the engine through the gearbox, the two output half shafts are connected to the wheel shafts on the corresponding sides of the vehicle, and the sealed oil tank is filled with lubricating oil for oil bath of the differential main body. When the differential is running, the lubricating oil in the differential is thrown outward under the action of centrifugal force, so that the central part of the differential lacks sufficient lubricating oil for lubrication. While the differential is running, the input gear can drive the shell to rotate through the side conical gear, so that the shell can drive the lubricating mechanism to transport the lubricating oil at the bottom of the sealed oil tank to the central part of the differential main body as a power source, so as to ensure that the central part of the differential main body will not be damaged by lack of sufficient lubricating oil during vehicle driving.

[0008] Optionally, the lubricating mechanism comprises an oil taking gear, an annular oil transfer pipe and a gear pump, the oil taking gear is coaxially installed on the shell; the annular oil transfer pipe is coaxially sleeved on the oil taking gear, and the annular oil transfer pipe is connected with the sealed oil tank; the gear teeth of the oil taking gear extend into the inside of the annular oil transfer pipe, and the oil taking gear and the annular oil transfer pipe are connected in dynamic sealing; The inside of the oil taking gear is provided with an annular oil cavity, the annular oil cavity comprises an oil taking part and an oil discharging part which are in communication with each other, the oil taking part is arranged on the inside of the sealed oil tank, and the oil taking part is provided with an oil taking hole which is in communication with the annular oil transfer pipe; The oil discharging part is arranged on the outside of the sealed oil tank; the oil pipe is arranged on the planetary shaft in the axial direction, the oil pipe between the two planetary gears is provided with an oil injection hole; the two ends of the oil pipe are connected with the oil discharging part through a first oil discharging pipe; The gear pump is installed on the oil inlet end of the annular oil transfer pipe, and is used for sending the lubricating oil in the sealed oil tank into the annular oil transfer pipe; the driving end of the gear pump is provided with a driven gear which is engaged with the oil taking gear.

[0009] By adopting the above technical scheme, when the shell rotates, the shell drives the oil taking gear to rotate, the oil taking gear drives the driven gear to rotate, the driven gear drives the gear pump to run, and the gear pump sends the lubricating oil in the sealed oil tank into the annular oil transfer pipe. The lubricating oil in the annular oil transfer pipe enters the oil taking part through the oil taking hole, then flows to the oil discharging part, then flows into the oil pipe through the first oil discharging pipe, and finally is sprayed out through the oil injection hole to supplement the lubricating oil for the central part of the differential main body.

[0010] Optionally, the oil taking hole has a plurality of oil taking holes which are distributed along the circumference of the oil taking gear.

[0011] By adopting the above technical scheme, the lubricating oil in the annular oil transfer pipe can flow smoothly into the oil taking part.

[0012] Optionally, the oil taking part is provided with a plurality of oil taking scrapers which are uniformly distributed along the circumference of the oil taking gear. The oil taking scrapers are distributed in a staggered manner with the oil taking holes, and the oil taking scrapers are arranged along the radial direction of the oil taking gear.

[0013] Optionally, the oil taking scrapers are also arranged in an inclined manner along the circumference of the oil taking gear.

[0014] By adopting the above technical scheme, when the oil taking gear rotates, the oil taking scrapers scrape the lubricating oil in the annular transfer oil pipe to the oil taking holes, so that the lubricating oil in the annular transfer oil pipe can flow more smoothly into the oil taking part.

[0015] Optionally, the oil injection holes are a plurality of, and the plurality of oil injection holes are distributed in a spherical manner with the center point of the planetary shaft as the spherical center.

[0016] By adopting the above technical scheme, the oil injection holes can spray lubricating oil to each part inside the differential main body.

[0017] Optionally, the oil suction end of the gear pump is provided with an oil suction pipe arranged vertically, and a plurality of annular mesh pipes are connected to the oil suction end of the oil suction pipe. The plurality of annular mesh pipes are distributed along the axial direction of the shell.

[0018] By adopting the above technical scheme, the oil suction pipe is used for oil suction at the oil suction end of the gear pump. Due to the centrifugal force during the operation of the differential main body, the lubricating oil at the center part of the differential main body is thrown to the circumferential inner wall of the sealed oil tank, so that the annular mesh pipe combined with the circumferential inner wall of the sealed oil tank is used as the oil inlet end of the oil suction pipe, the oil suction range of the oil suction pipe is expanded, and the effective oil suction area of the oil suction pipe can be increased.

[0019] Optionally, the sealed oil tank and the shell are connected to the output half shaft through dynamic sealing. The input shaft is connected to the sealed oil tank through dynamic sealing.

[0020] By adopting the above technical scheme, the leakage between the sealed oil tank, the shell and the output half shaft is avoided, and the leakage between the input shaft and the sealed oil tank is avoided.

[0021] Optionally, a coaxial first annular oil groove is arranged between the planetary gear and the planetary shaft, and an oil injection hole is arranged on the oil pipe and communicates with the first annular oil groove. A second annular oil groove is arranged between the output half shaft and the shell. A third annular oil groove is arranged between the output half shaft and the sealed oil tank. The fourth annular oil groove is arranged between the input shaft and the sealed oil tank. The oil outlet part is communicated with the second annular oil groove, the third annular oil groove and the fourth annular oil groove.

[0022] By adopting the above technical scheme, the rotating connection parts of the planetary gear, the output half shaft, the input shaft and other parts are lubricated, and smooth rotation of the planetary gear, the output half shaft and the input shaft is ensured.

[0023] A vehicle comprises the differential mentioned in any of the above.

[0024] By adopting the above technical scheme, the vehicle is less likely to malfunction due to lack of lubricating oil in the center part of the differential during driving, which is beneficial to driving safety.

[0025] In summary, the present application has at least one of the following beneficial technical effects: 1. During operation of a conventional differential, the lubricating oil inside the differential is thrown outward under the action of centrifugal force, so that the center part of the differential lacks sufficient lubricating oil for lubrication. In the present application, the input gear can drive the shell to rotate through the side taper gear while the differential body is operating, so that the shell can drive the lubricating mechanism to deliver the lubricating oil at the bottom of the sealed oil tank to the center part of the differential body. During vehicle driving, the center part of the differential body is ensured not to be damaged by lack of sufficient lubricating oil, such as ablation; 2. By driving the lubricating mechanism with the shell as a power source, the shell drives the oil taking gear to rotate when the shell rotates, the oil taking gear drives the driven gear to rotate, the driven gear drives the gear pump to operate, and the gear pump delivers the lubricating oil in the sealed oil tank into the annular transfer oil pipe. The lubricating oil in the annular transfer oil pipe enters the oil taking part through the oil taking hole, then flows to the oil outlet part, then flows into the oil pipe through the first oil outlet pipe, and finally is sprayed out through the oil injection hole, to supplement the lubricating oil in the center part of the differential body; 3. By arranging the oil taking scraper inclined along the circumference of the oil taking gear, the oil taking scraper scrapes the lubricating oil in the annular transfer oil pipe to the oil taking hole when the oil taking gear rotates, so as to facilitate smoother entry of the lubricating oil in the annular transfer oil pipe into the oil taking part.

[0026] 4. By arranging the first annular oil groove, the second annular oil groove, the third annular oil groove and the fourth annular oil groove communicated with the oil outlet part, the rotating connection parts of the planetary gear, the output half shaft, the input shaft and other parts can be lubricated, and smooth rotation of the planetary gear, the output half shaft and the input shaft is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0028] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application; Figure 2 is a schematic diagram of the cross-sectional structure of the embodiment of the present application; Figure 3 is an enlarged schematic diagram of part A in Figure 2 Figure 4 is an enlarged schematic diagram of part B in Figure 2

[0029] Reference signs: 1, differential main body; 11, housing; 12, side face bevel gear; 13, planetary shaft; 1301, oil pipe; 1302, first annular oil groove; 1303, oil injection hole; 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, lubricating mechanism; 31, oil taking gear; 311, annular oil cavity; 31101, oil taking part; 31102, oil discharging 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 discharging pipe; 36, second oil discharging pipe; 37, third oil discharging pipe; 38, fourth oil discharging pipe. DETAILED DESCRIPTION

[0030] The following will be described in detail in combination with the accompanying Figures 1-4 The present application will be further described in detail.

[0031] The embodiment of the present application discloses a differential and a vehicle thereof.

[0032] Reference Figure 1 and Figure 2 The differential comprises a differential main body 1, a sealed oil tank 2 and a lubricating mechanism 3. The differential main body 1 is arranged in the sealed oil tank 2, and the input end and the output end of the differential main body 1 are both rotationally connected with the sealed oil tank 2 and are also both connected with the sealed oil tank 2 through dynamic sealing. The inner bottom of the sealed oil tank 2 is used for storing lubricating oil. The lubricating mechanism 3 is arranged in the sealed oil tank 2 and is used for conveying the lubricating oil at the bottom of the sealed oil tank 2 to each part of the differential main body 1 that needs to be lubricated. ​​

[0033] With reference to 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 the coaxial side bevel gear 12, the side of the side bevel gear 12 is provided with the vertically meshing input gear 150, the upper part of the input gear 150 is provided with the coaxial input shaft 15, the input shaft 15 extends out of the sealed oil tank 2, and the input shaft 15 is connected to the sealed oil tank 2 through dynamic sealing.

[0034] With reference to Figure 2 , Figure 3 and Figure 4 , the housing 11 is provided with the planetary shaft 13 arranged along the diameter direction of the side bevel gear 12, and the planetary shaft 13 is fixedly installed on the housing 11. The two ends of the planetary shaft 13 are provided with the planetary gears 130 rotatably connected in a sleeved manner, and the two planetary gears 130 are symmetrically arranged along the axial direction of the side bevel gear 12.

[0035] With reference to Figure 2 , Figure 3 and Figure 4 , the two ends of the housing 11 are provided with the coaxial output half shafts 14, the ends of the two output half shafts 14 extending out of the sealed oil tank 2 are connected to the sealed oil tank 2 through dynamic sealing, and the opposite ends of the two output half shafts 14 are provided with the sun gears 140, and the two sun gears 140 are meshed with the two planetary gears 130.

[0036] With reference to Figure 2 , Figure 3 and Figure 4 , in the embodiment, the input shaft 15 is connected to the engine through the gearbox, and the two output half shafts 14 are respectively connected to the wheel shafts of the corresponding sides of the vehicle. The engine drives the input shaft 15 to rotate, and then the input gear 150 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 running straight, the planetary gear 130 rigidly drives the two sun gears 140 to rotate synchronously. When the vehicle is turning, the rotational speeds of the wheels on both sides are not the same, at this time the planetary gear 130 rolls on the sun gear 140, so that the two sun gears 140 can produce a speed difference.

[0037] With reference to Figure 2 , Figure 3 and Figure 4Specifically, the oil pipe 1301 coaxial with the planetary shaft 13 is arranged on the planetary shaft 13, the first annular oil groove 1302 coaxial with the planetary shaft 13 is arranged between the planetary gear 130 and the planetary shaft 13, the first annular oil groove 1302 is arranged on the planetary gear 130 and / or the planetary shaft 13, and the oil injection hole 1303 in communication with the first annular oil groove 1302 is arranged on the oil pipe 1301.

[0038] With reference to Figure 2 , Figure 3 and Figure 4 , the second annular oil groove 1401 is arranged between the output half shaft 14 and the housing 11.

[0039] With reference to Figure 2 , Figure 3 and Figure 4 , the third annular oil groove 1402 is arranged between the output half shaft 14 and the sealed oil tank 2.

[0040] With reference to Figure 2 , Figure 3 and Figure 4 , the fourth annular oil groove 1501 is arranged between the input shaft 15 and the sealed oil tank 2.

[0041] With reference to Figure 2 , Figure 3 and Figure 4 , the lubricating 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.

[0042] With reference to Figure 2 , Figure 3 and Figure 4In the embodiment of the application, the lubricating oil at the bottom of the sealed oil tank 2 is delivered by the lubricating mechanism 3 into the oil pipe 1301, the second annular oil groove 1401, the third annular oil groove 1402, and the fourth annular oil groove 1501. Part 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 planet shaft 13, and another part of the lubricating oil is sprayed out through the oil spray hole 1304, which is in a spherical divergent posture from the central part of the differential main body 1 to spray the lubricating oil to the periphery, so that the central part of the differential main body 1 can be continuously lubricated and cooled by the lubricating oil. Even if the lubricating oil soaked in the gear part of the central part of the differential main body 1 is separated from the gear due to the centrifugal force of the differential main body 1 during operation, the lubricating oil sprayed out from the central part of the differential main body 1 to the outside can still lubricate the differential main body 1 from the inside to the outside, avoiding the damage such as ablation caused by the lack of effective lubrication and cooling of the gear due to the centrifugal force.

[0043] With reference to Figure 2 , Figure 3 and Figure 4 , specifically, the lubricating mechanism 3 comprises 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, and the oil taking gear 31 is coaxially installed on the housing 11.

[0044] With reference to Figure 2 , Figure 3 and Figure 4 , the annular transfer oil pipe 32 is coaxially sleeved on the oil taking gear 31, and the annular transfer oil pipe 32 is connected with 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 the oil taking gear 31 is connected with the annular transfer oil pipe 32 in dynamic sealing.

[0045] With reference to Figure 2 , Figure 3 and Figure 4 , the oil taking gear 31 is provided with a coaxial annular oil cavity 311, and the annular oil cavity 311 comprises an oil taking part 31101 and an oil outlet part 31102 which are in communication with each other. The oil taking part 31101 is arranged on the inside of the sealed oil tank 2, and the oil outlet part 31102 is arranged on the outside of the sealed oil tank 2.

[0046] With reference to Figure 2 , Figure 3 and Figure 4The oil taking part 31101 is provided with a plurality of oil taking holes 312 and a plurality of oil taking scrapers 313 which are uniformly distributed along the circumferential direction of the oil taking gear 31. The oil taking scrapers 313 are arranged along the radial direction of the oil taking gear 31, and the direction in which the oil taking scrapers 313 are inclined is the same as the direction in which the oil taking gear 31 rotates when the vehicle moves forward. When the oil taking gear 31 rotates at a high speed along with the shell 11, the lubricating oil is not easy to enter the oil taking holes 312, and the oil taking scrapers 313 serve to scrape the lubricating oil in the sealed oil tank 2 to the oil taking holes 312, so that the lubricating oil can flow smoothly into the oil taking holes 312, and at the same time, the oil taking scrapers 313 can also serve as reinforcing ribs to enhance the strength of the oil taking gear 31.

[0047] With reference to Figure 2 , Figure 3 and Figure 4 , the oil taking part 31101 is provided with a plurality of oil taking holes 312 and a plurality of oil taking scrapers 313 which are uniformly distributed along the circumferential direction of the oil taking gear 31. The oil taking scrapers 313 are arranged along the radial direction of the oil taking gear 31, and the direction in which the oil taking scrapers 313 are inclined is the same as the direction in which the oil taking gear 31 rotates when the vehicle moves forward. When the oil taking gear 31 rotates at a high speed along with the shell 11, the lubricating oil is not easy to enter the oil taking holes 312, and the oil taking scrapers 313 serve to scrape the lubricating oil in the sealed oil tank 2 to the oil taking holes 312, so that the lubricating oil can flow smoothly into the oil taking holes 312, and at the same time, the oil taking scrapers 313 can also serve as reinforcing ribs to enhance the strength of the oil taking gear 31.

[0048] With reference to Figure 2 , Figure 3 and Figure 4 , the oil taking part 31101 is provided with a plurality of oil taking holes 312 and a plurality of oil taking scrapers 313 which are uniformly distributed along the circumferential direction of the oil taking gear 31. The oil taking scrapers 313 are arranged along the radial direction of the oil taking gear 31, and the direction in which the oil taking scrapers 313 are inclined is the same as the direction in which the oil taking gear 31 rotates when the vehicle moves forward. When the oil taking gear 31 rotates at a high speed along with the shell 11, the lubricating oil is not easy to enter the oil taking holes 312, and the oil taking scrapers 313 serve to scrape the lubricating oil in the sealed oil tank 2 to the oil taking holes 312, so that the lubricating oil can flow smoothly into the oil taking holes 312, and at the same time, the oil taking scrapers 313 can also serve as reinforcing ribs to enhance the strength of the oil taking gear 31.

[0049] With reference to Figure 2 , Figure 3 and Figure 4 , the oil taking part 31101 is provided with a plurality of oil taking holes 312 and a plurality of oil taking scrapers 313 which are uniformly distributed along the circumferential direction of the oil taking gear 31. The oil taking scrapers 313 are arranged along the radial direction of the oil taking gear 31, and the direction in which the oil taking scrapers 313 are inclined is the same as the direction in which the oil taking gear 31 rotates when the vehicle moves forward. When the oil taking gear 31 rotates at a high speed along with the shell 11, the lubricating oil is not easy to enter the oil taking holes 312, and the oil taking scrapers 313 serve to scrape the lubricating oil in the sealed oil tank 2 to the oil taking holes 312, so that the lubricating oil can flow smoothly into the oil taking holes 312, and at the same time, the oil taking scrapers 313 can also serve as reinforcing ribs to enhance the strength of the oil taking gear 31.

[0050] With reference to Figure 2 , Figure 3 and Figure 4 , the oil taking part 31101 is provided with a plurality of oil taking holes 312 and a plurality of oil taking scrapers 313 which are uniformly distributed along the circumferential direction of the oil taking gear 31. The oil taking scrapers 313 are arranged along the radial direction of the oil taking gear 31, and the direction in which the oil taking scrapers 313 are inclined is the same as the direction in which the oil taking gear 31 rotates when the vehicle moves forward. When the oil taking gear 31 rotates at a high speed along with the shell 11, the lubricating oil is not easy to enter the oil taking holes 312, and the oil taking scrapers 313 serve to scrape the lubricating oil in the sealed oil tank 2 to the oil taking holes 312, so that the lubricating oil can flow smoothly into the oil taking holes 312, and at the same time, the oil taking scrapers 313 can also serve as reinforcing ribs to enhance the strength of the oil taking gear 31.

[0051] With reference to Figure 2 , Figure 3 and Figure 4 , the bottom end of the annular transfer oil pipe 32 is provided with an oil suction pipe 321 arranged vertically, the oil inlet end of the oil suction pipe 321 is connected with a plurality of annular mesh pipes 323, the annular mesh pipes 323 are coaxial with the sealed oil tank 2 and are arranged in close contact with the inner wall of the sealed oil tank 2. The plurality of annular mesh pipes 323 are distributed along the axial direction of the housing 11.

[0052] With reference to Figure 2 , Figure 3 and Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure 4 Figure 2 Figure 3 Figure , the oil outlet end of the oil suction pipe 321 is provided with a gear pump 34 installed in the sealed oil tank 2, and the drive shaft of the gear pump 34 is provided with a driven gear 33 engaged with the oil extraction gear 31.

[0053] In the embodiment of the present application, the sealed oil tank 2 stores a proper amount of lubricating oil at the bottom, and the amount of lubricating oil is referred to the oil amount of the oil bath lubrication mode of a conventional differential. When the input gear 150 drives the side face bevel gear 12 to rotate, the housing 11 drives the oil extraction gear 31 to rotate, and then the oil extraction gear 31 drives the driven gear 33 to rotate, and the driven gear 33 drives the gear pump 34 to operate, so as to transport the lubricating oil at the bottom of the sealed oil tank 2 into the annular transfer oil pipe 32, and then 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 through the oil extraction gear 31, and then to 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, and then to the planetary gear 130 and the sun gear 140, so as to realize effective lubrication of each part of the differential main body 1. Since the lubricating oil at the central part of the differential main body 1 is thrown to the circumferential inner wall of the sealed oil tank 2 under the action of centrifugal force when the differential main body 1 operates, the annular mesh pipe 323 in close contact with the circumferential inner wall of the sealed oil tank 2 is used as the oil inlet end of the oil suction pipe 321, so as to increase the oil suction range of the oil suction pipe 321, and the oil suction pipe 321 can increase the effective oil suction area.

[0054] A vehicle comprising the differential of any one of the above.

[0055] In the embodiment of the present application, the vehicle is not prone to failure due to lack of lubricating oil at the central part of the differential during driving, which is beneficial to driving safety.

[0056] The implementation principle of the differential in the embodiment of the present application is as follows: The sealing oil tank 2 stores a proper amount of lubricating oil, and the amount of the lubricating oil is referred to the amount of oil in the oil bath lubrication of a conventional differential. When the input gear 150 drives the side bevel gear 12 to rotate, the housing 11 drives the oil taking gear 31 to rotate, and then the oil taking gear 31 drives the driven gear 33 to rotate, and the driven gear 33 drives the gear pump 34 to operate, and the gear pump 34 delivers the lubricating oil in the bottom of the sealing oil tank 2 to the annular transfer pipe 32, and then the lubricating oil is delivered 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 through the oil taking gear 31, and then the 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 fifth annular oil groove 1501, and the lubricating oil is sprayed to the planetary gear 130 and the sun gear 140, so as to effectively lubricate each part of the differential main body 1.

[0057] In the differential main body 1, the lubricating oil in the central part of the differential main body 1 is thrown to the circumferential inner wall of the sealing oil tank 2 under the action of centrifugal force when the differential main body 1 operates, and the annular mesh pipe 323 attached to the circumferential inner wall of the sealing oil tank 2 is used as the oil inlet end of the oil suction pipe 321, so as to increase the oil suction range of the oil suction pipe 321, and the oil suction pipe 321 can increase the effective oil suction area.

[0058] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the common meaning understood by one of ordinary skill in the art to which the present application pertains. The words "first", "second", "third" and the like used in the specification and claims of the present application do not denote any order, quantity or importance, but are used to distinguish different components. The words "one" or "a" or the like do not denote a quantity limitation, but mean that there is at least one. The words "including" or "containing" and the like mean that the elements or objects before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, and do not exclude other elements or objects. The words "upper", "lower", "left", "right" and the like are used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0059] The above are optional embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present 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).

2. A differential according to claim 1, characterized in that: 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 inside the sealed oil tank (2), and the oil-taking part (31101) has an oil-taking hole (312) that is connected to the annular transfer oil pipe (32). The oil outlet (31102) is located on the outside of the sealed oil tank (2); 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) by 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).

3. A differential according to claim 2, 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).

4. A differential according to claim 3, 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).

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

6. A differential according to claim 2, 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.

7. A differential according to claim 2, 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).

8. A differential according to claim 2, 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).

9. A differential according to claim 8, characterized in that: 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).

10. A vehicle, characterized in that: Includes the differential as described in any one of claims 1-9.

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