Lubricating system, transmission and vehicle

Abstract

The utility model belongs to the technical field of vehicle lubrication, and particularly relates to a lubrication system, a transmission and a vehicle, the lubrication system comprises a differential gear, an input shaft, a reduction gear, a bearing, an oil collecting box, an oil pump and a shell with an internal space; the differential gear and the oil collecting box are both mounted in the internal space; an oil outlet located above the reduction gear is formed in the oil collecting box; the oil collecting box is used for collecting lubricating oil which is stirred and splashed in the internal space of the differential gear and spraying the lubricating oil to the reduction gear through the oil outlet; the reduction gear is rotationally installed in the inner space through a bearing, the input shaft is fixedly connected with the reduction gear, and a first oil injection channel is formed among the input shaft, the reduction gear and the inner wall of the inner space; the oil pump is installed on the shell and used for driving lubricating oil in the inner space to be sprayed to the bearing through the first oil spraying channel. The lubrication system integrates an active and passive lubrication combination mode, and can achieve a good lubrication effect on the reduction gear and the bearing.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle lubrication, in particular to a lubrication system, a transmission and a vehicle. Background Art

[0002] The transmission fluid cooling and lubrication system is responsible for continuously supplying lubricating oil to the various transmission components of the vehicle, and its working reliability will directly affect the performance of the entire vehicle. In the prior art, the transmission lubrication system often uses splash lubrication to splash lubricating oil onto the reduction gear to lubricate the reduction gear and bearings. However, since the bearings of the transmission are often enclosed inside the reduction gear, and most of the lubricating oil splashed onto the reduction gear in the reducer is thrown away by the reduction gear, it is difficult to flow to the bearings. Therefore, the above scheme has a poor lubrication effect on the transmission bearings, thereby affecting the performance of the entire vehicle. Utility Model Content

[0003] The utility model aims at the technical problems of poor lubrication effect on bearings in the prior art and proposes a lubrication system, a transmission and a vehicle.

[0004] In order to solve the above problems, the first embodiment of the utility model provides a lubrication system, including a differential gear, an input shaft, a reduction gear, a bearing, an oil collecting box, an oil pump and a housing with an internal space; the differential gear and the oil collecting box are both installed in the internal space; the oil collecting box is provided with an oil outlet located above the reduction gear; the oil collecting box is used to collect the lubricating oil stirred and splashed by the differential gear in the internal space and spray the lubricating oil onto the reduction gear through the oil outlet;

[0005] The reduction gear is rotatably mounted in the internal space via the bearing, the input shaft is fixedly connected to the reduction gear, and a first oil injection channel is provided between the input shaft, the reduction gear and the inner wall of the internal space; the oil pump is mounted on the housing and is used to drive the lubricating oil in the internal space to be sprayed onto the bearing through the first oil injection channel.

[0006] Optionally, a second oil injection channel is provided between the bearing, the reduction gear and the inner wall of the internal space; the second oil injection channel is connected to an end of the bearing away from the first oil injection channel;

[0007] The oil collecting box is arranged opposite to an end of the second oil injection channel away from the bearing, so that the lubricating oil in the second oil injection channel is sprayed onto the outer wall of the oil collecting box and then flows back and drips onto the reduction gear.

[0008] Optionally, a mounting groove is provided on the reduction gear, a protrusion is provided on the inner wall of the internal space, and a plug-in hole is provided on the protrusion;

[0009] The protrusion extends into the installation groove, the bearing is located in the installation groove and is rotatably connected between the protrusion and the reduction gear; the input shaft is rotatably inserted in the insertion hole; the insertion hole is connected to the first oil injection channel.

[0010] Optionally, the input shaft is provided with a first oil passage connected to the plug hole, and an injection port connected to the first oil passage.

[0011] Optionally, the lubrication system further includes an oil cooler, and the oil pump is connected to the first oil injection channel through the oil cooler.

[0012] Optionally, the lubrication system further comprises an oil pipe connected to the motor end, and an end of the oil pipe away from the motor end is connected to an end of the oil cooler away from the oil pump.

[0013] Optionally, the lubrication system further includes a filter, and the oil pump is connected to the first oil injection channel through the filter and the oil cooler in sequence.

[0014] Optionally, the lubrication system further includes a second oil passage and a third oil passage arranged on the housing, the filter is connected to the inlet of the oil cooler through the second oil passage, and the outlet of the oil cooler is connected to the first oil injection channel through the third oil passage.

[0015] Another embodiment of the utility model further provides a transmission, comprising the above-mentioned lubrication system.

[0016] Yet another embodiment of the present invention provides a vehicle, comprising the above-mentioned transmission.

[0017] In the utility model, the oil collecting box is installed in the internal space and is used to collect the lubricating oil splashed by the differential gear. The oil collecting box is provided with an oil outlet for spraying the lubricating oil therein onto the reduction gear. When the vehicle is driving, the differential gear stirs up the lubricating oil at the bottom of the internal space and throws the stirred lubricating oil into the oil collecting box. The lubricating oil in the oil collecting box will be sprayed onto the reduction gear (especially onto the meshing part of the reduction gear) through the oil outlet at the bottom thereof, thereby achieving a better lubrication and cooling effect on the reduction gear.

[0018] In addition, the oil pump is connected to the internal space and the first oil injection channel, and is used to spray the lubricating oil in the internal space onto the bearing through the first oil injection channel; the oil pump can absorb the lubricating oil at the bottom of the internal space and input it into the first oil injection channel, and the lubricating oil in the first oil injection channel will be sprayed onto the bearing and the reduction gear, thereby lubricating and cooling the bearing and the reduction gear; and there is no need to additionally open an oil channel on the input shaft and the housing for lubricating the bearings, and the technical effect of lubricating the bearings can be achieved by utilizing the first oil injection channel formed between the input shaft and the housing, thereby reducing the manufacturing cost of the lubrication system.

[0019] In summary, the lubrication system integrates a combination of active and passive lubrication (splash lubrication and pumping lubrication), which can achieve a better lubrication effect on the reduction gear and the bearing, thereby improving the lubrication capacity of the lubrication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of a lubrication system provided by an embodiment of the utility model;

[0022] Figure 2 A partial schematic diagram of a lubrication system provided by an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of active lubrication of a lubrication system provided by an embodiment of the utility model;

[0024] Figure 4 A partial schematic diagram of active lubrication of a lubrication system provided by an embodiment of the utility model;

[0025] Figure 5 A schematic structural diagram of an oil collecting box of a lubrication system provided in one embodiment of the utility model.

[0026] The reference numerals in the specification are as follows:

[0027] 1. Differential gear; 2. Input shaft; 21. First oil injection channel; 22. First oil channel; 23. Injection port; 24. Second oil injection channel; 3. Reduction gear; 4. Bearing; 5. Oil collecting box; 51. Oil outlet; 6. Oil pump; 7. Housing; 71. Internal space; 72. Protrusion; 721. Plug-in hole; 73. Second oil channel; 74. Third oil channel; 8. Filter; 9. Oil cooler; 101. Oil pipe. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the utility model and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations of the utility model.

[0030] like Figures 1 to 5 As shown, a lubrication system provided by the first embodiment of the utility model includes a differential gear 1, an input shaft 2, a reduction gear 3, a bearing 4, an oil collecting box 5, an oil pump 6 and a housing 7 with an internal space 71; the differential gear 1 and the oil collecting box 5 are both installed in the internal space 71; the oil collecting box 5 is provided with an oil outlet 51 located above the reduction gear 3; the oil collecting box 5 is used to collect the lubricating oil stirred and splashed by the differential gear 1 in the internal space 71 and spray the lubricating oil onto the reduction gear 3 through the oil outlet 51; it can be understood that other components are also installed in the internal space 71, such as gears, etc., which will not be repeated here.

[0031] The reduction gear 3 is rotatably mounted in the internal space 71 through the bearing 4, the input shaft 2 is fixedly connected to the reduction gear 3, and a first oil injection channel 21 is provided between the input shaft 2, the reduction gear 3 and the inner wall of the internal space 71; the oil pump 6 is mounted on the housing 7 and is used to drive the lubricating oil in the internal space 71 to be sprayed onto the bearing 4 through the first oil injection channel 21. Preferably, the reduction gear 3 and the input shaft 2 are integrally formed. It can be understood that the input shaft 2 and the housing 7 are clearance-matched, so that a first oil injection channel 21 is formed between the input shaft 2 and the housing 7; and the first oil injection channel 21 is arranged opposite to the bearing 4, that is, the outlet of the first oil injection channel 21 is facing the bearing 4. An oil storage space for storing lubricating oil is provided on the oil collecting box 5, and the oil outlet 51 is arranged at the bottom of the oil collecting box 5 and connected to the oil storage space, and the top of the oil collecting box 5 is an opening, and the lubricating oil splashed by the differential gear 1 can fall from its opening into the oil storage space. It should be noted that the oil pump 6 can be installed in the internal space 71 or on the outer wall of the housing 7 . The inlet of the oil pump 6 is connected to the bottom of the internal space 71 , and the outlet of the oil pump 6 is connected to the first oil injection channel 21 .

[0032] Specifically, when the vehicle is running, the differential gear 1 stirs up the lubricating oil, and the oil collecting box 5 located at the upper part of the internal space 71 can effectively collect part of the lubricating oil. The oil outlet 51 opened at the bottom of the oil collecting box 5 guides the lubricating oil to the meshing position of the reduction gear 3 where the oil is difficult to splash, cooling and lubricating the meshing gear pair; when the amount of lubricating oil collected by the oil collecting box 5 is greater than the amount of oil flowing out of its oil outlet 51, the oil collecting box 5 can be filled with oil in a short time, and finally effectively reduce the liquid level of the oil pool at the bottom of the internal space 71, so as to achieve the purpose of reducing the gear oil stirring loss and improve the transmission efficiency. When the vehicle is in a horizontal posture, the oil collecting box 5 collects the largest amount of oil, and the vehicle is on a horizontal road most of the time, so the gear oil stirring loss can be reduced to a large extent.

[0033] When the vehicle is traveling in extreme postures such as uphill, downhill, or sideways, the oil stored in the oil collecting box 5 can be poured from the opening and quickly flow back to the shell 7 to the bottom to replenish the oil in the bottom oil pool to meet the working requirements of the cooling and lubrication system and avoid malfunctions.

[0034] In the lubrication system provided by the utility model, the input shaft 2 is supported on the housing 7 by the bearing 4. In this arrangement, the lubricating oil cannot splash onto the bearing 4, so the bearing 4 needs to be cooled and lubricated by active lubrication. The oil pump 6 extracts the lubricating oil from the bottom of the internal space 71 and lubricates the bearing 4 through the first oil injection channel 21.

[0035] In the utility model, the oil collecting box 5 is installed in the internal space 71 and is used to collect the lubricating oil splashed by the differential gear 1. The oil collecting box 5 is provided with an oil outlet 51 for spraying the lubricating oil therein onto the reduction gear 3. When the vehicle is driving, the differential gear 1 stirs up the lubricating oil at the bottom of the internal space 71 and throws the stirred lubricating oil into the oil collecting box 5. The lubricating oil in the oil collecting box 5 will be sprayed onto the reduction gear 3 (especially onto the meshing part of the reduction gear 3) through the oil outlet 51 at the bottom thereof, thereby achieving a better lubrication and cooling effect on the reduction gear 3.

[0036] In addition, the oil pump 6 connects the internal space 71 and the first oil injection channel 21, and is used to spray the lubricating oil in the internal space 71 onto the bearing 4 through the first oil injection channel 21; the oil pump 6 can absorb the lubricating oil at the bottom of the internal space 71 and input it into the first oil injection channel 21, and the lubricating oil in the first oil injection channel 21 will be sprayed onto the bearing 4 and the reduction gear 3, thereby lubricating and cooling the bearing 4 and the reduction gear 3; and there is no need to open additional oil channels for lubricating the bearing 4 on the input shaft 2 and the housing 7, and the technical effect of lubricating the bearing 4 can be achieved by utilizing the first oil injection channel 21 formed between the input shaft 2, the reduction gear 3 and the housing 7, thereby reducing the manufacturing cost of the lubrication system.

[0037] In summary, the lubrication system integrates a combination of active and passive lubrication (splash lubrication and pumping lubrication), which can achieve a better lubrication effect on the reduction gear 3 and the bearing 4, thereby improving the lubrication capacity of the lubrication system.

[0038] In one embodiment, if Figure 2 and Figure 4 As shown, a second oil injection channel 24 is provided between the bearing 4, the reduction gear 3 and the inner wall of the internal space 71; the second oil injection channel 24 is connected to an end of the bearing 4 away from the first oil injection channel 21; it can be understood that the first oil injection channel 21 and the second oil injection channel 24 are respectively located on opposite sides of the bearing 4.

[0039] The oil collecting box 5 is arranged opposite to the end of the second oil injection channel 24 away from the bearing 4, so that the lubricating oil of the second oil injection channel 24 is sprayed onto the outer wall of the oil collecting box 5 and then flows back and drips onto the reduction gear 3. It can be understood that the oil collecting box 5 is located above the second oil injection channel 24 and the reduction gear 3.

[0040] Specifically, when the vehicle is parked and the input shaft 2 is running (such as the parking power generation mode of a hybrid vehicle), since the differential gear 1 is not running, no splashing lubricating oil will be generated in the internal space 71, and the oil collecting box 5 will not collect the lubricating oil, but the input shaft 2 is in a rotating state; at this time, the oil pump 6 draws lubricating oil from the bottom of the internal space 71 and sprays it into the first oil injection channel 21. The lubricating oil in the first oil injection channel 21 lubricates the bearing 4 and then enters the second oil injection channel 24. The lubricating oil in the second oil injection channel 24 continues to flow upward until the lubricating oil contacts the outer wall of the oil collecting box 5, and then flows back to the reduction gear 3, further improving the lubrication effect of the lubrication system on the reduction gear 3.

[0041] In one embodiment, if Figure 2 and Figure 4 As shown, a mounting groove is provided on the reduction gear 3, a protrusion 72 is provided on the inner wall of the internal space 71, and a plug hole 721 is provided on the protrusion 72; it can be understood that the mounting groove is arranged on the end face of the reduction gear 3; the inner ring of the bearing 4 is sleeved on the protrusion 72, and the reduction gear 3 is sleeved on the outer ring of the bearing 4, so that the reduction gear 3 and the input shaft 2 can rotate around the protrusion 72 through the bearing 4.

[0042] The protrusion 72 extends into the mounting groove, the bearing 4 is located in the mounting groove and is rotatably connected between the protrusion 72 and the reduction gear 3; the input shaft 2 is rotatably inserted in the plug hole 721; the plug hole 721 is connected to the first oil injection channel 21. It can be understood that the outlet of the oil pump 6 is connected to the first oil injection channel 21 through the plug hole 721. In this embodiment, there is a clearance fit between the input shaft 2 and the plug hole 721, and there is also a clearance fit between the reduction gear 3 and the end of the protrusion 72, so that the first oil injection channel 21 will be formed between the input shaft 2, the reduction gear 3 and the protrusion 72. In this embodiment, the first oil injection channel 21 can be formed without additionally providing oil holes on the input shaft 2 and the housing 7, which reduces the manufacturing difficulty of the input shaft 2 and the housing 7, thereby reducing the manufacturing cost of the lubrication system.

[0043] In one embodiment, if Figure 2 As shown, the input shaft 2 is provided with a first oil passage 22 connected to the plug hole 721, and an injection port 23 connected to the first oil passage 22. It can be understood that the first oil passage 22 is arranged along the axis of the input shaft 2, the injection port 23 is arranged along the radial direction of the input shaft 2, and the number of the injection ports 23 can be set according to actual needs.

[0044] Specifically, part of the lubricating oil inputted by the oil pump 6 to the plug hole 721 flows into the first oil injection channel 21 to lubricate the bearing 4 and the reduction gear 3, and the other part flows into the first oil channel 22, and then is sprayed to other parts of the transmission through the injection port 23. In this embodiment, the lubrication system has a good lubrication effect on the transmission.

[0045] In one embodiment, if Figure 1 As shown, the lubrication system further includes an oil cooler 9, and the oil pump 6 is connected to the first oil injection channel 21 through the oil cooler 9. It can be understood that the oil cooler 9 can cool the lubricating oil; preferably, the oil cooler 9 is installed on the outer wall of the housing 7. Specifically, the oil pump 6 extracts the lubricating oil in the internal space 71 and after being cooled by the oil cooler 9, it is input into the first oil injection channel 21. In this embodiment, the design of the oil cooler 9 further improves the lubrication effect and cooling effect of the lubrication system.

[0046] In one embodiment, if Figure 1 As shown, the lubrication system further includes an oil pipe 101 connected to the motor end, an end of the oil cooler 9 away from the oil pump 6 is connected to the first oil injection channel 21, and an end of the oil pipe 101 connected to the motor end is connected. Preferably, the oil pipe 101 is installed in the internal space 71. Specifically, after the oil pump 6 extracts the lubricating oil from the internal space 71 and is cooled by the oil cooler 9, a part of the lubricating oil in the oil cooler 9 is input into the first oil injection channel 21, and another part of the lubricating oil in the oil cooler 9 is input into the motor end through the oil pipe 101, thereby lubricating the motor, bearings, etc. at the motor end.

[0047] In one embodiment, if Figure 1 As shown, the lubrication system further includes a filter 8, and the oil pump 6 is connected to the first oil injection channel 21 through the filter 8 and the oil cooler 9 in sequence. Preferably, the filter 8 is installed in the internal space 71. It can be understood that the filter 8 can filter the lubricating oil. Specifically, the lubricating oil extracted from the internal space 71 by the oil pump 6 is filtered by the filter 8, and then cooled by the oil cooler 9 before being output to the first oil injection channel 21. In this embodiment, the design of the filter 8 and the oil cooler 9 further improves the cooling effect of the lubrication system.

[0048] In one embodiment, if Figure 3 As shown, the lubrication system further includes a second oil passage 73 and a third oil passage 74 provided on the housing 7. The filter 8 is connected to the inlet of the oil cooler 9 through the second oil passage 73, and the outlet of the oil cooler 9 is connected to the first oil injection passage 21 through the third oil passage 74. Specifically, the oil pump 6 extracts the lubricating oil from the internal space 71 and after filtering by the filter 8, it is input into the oil cooler 9 located outside the housing 7 through the second oil passage 73. After the oil cooler 9 cools the lubricating oil, a part of it is input into the motor end through the oil pipe 101, and the other part is input into the plug hole 721 through the second oil passage 73. A part of the lubricating oil in the plug hole 721 is input into the first oil injection passage 21, and the other part is input into the first oil passage 22 of the input shaft 2. In this embodiment, the lubrication system has a compact structure and low manufacturing cost.

[0049] In the utility model, the working principle of the lubrication system is:

[0050] When the vehicle is running, the differential gear 1 stirs up the lubricating oil, and the oil collecting box 5 located at the upper part of the internal space 71 can effectively collect part of the lubricating oil. The oil outlet 51 opened at the bottom of the oil collecting box 5 guides the lubricating oil to the meshing position of the reduction gear 3 where the oil is difficult to splash, cooling and lubricating the meshing gear pair; when the amount of lubricating oil collected by the oil collecting box 5 is greater than the amount of oil flowing out of its oil outlet 51, the oil collecting box 5 can be filled with oil in a short time, and finally effectively reduce the liquid level of the oil pool at the bottom of the internal space 71, so as to achieve the purpose of reducing the gear oil stirring loss and improve the transmission efficiency. When the vehicle is in a horizontal posture, the oil collecting box 5 collects the largest amount of oil, and the vehicle is on a horizontal road most of the time, so the gear oil stirring loss can be reduced to a large extent.

[0051] When the vehicle is traveling in extreme postures such as uphill, downhill, or sideways, the oil stored in the oil collecting box 5 can be poured from the opening and quickly flow back to the bottom of the box to replenish the oil in the bottom oil pool to meet the working requirements of the cooling and lubrication system and avoid malfunctions.

[0052] In the lubrication system provided by the utility model, the input shaft 2 is supported on the housing 7 through the bearing 4. In this arrangement, the lubricating oil cannot splash onto the bearing 4, so the bearing 4 needs to be cooled and lubricated by active lubrication. The oil pump 6 extracts the lubricating oil from the bottom of the internal space 71, flows to the oil cooler 9 after passing through the filter 8, and then flows to the plug hole 721 and the oil pipe 101 respectively; the lubricating oil through the oil pipe 101 is used to cool the motor end. After a part of the lubricating oil in the plug hole 721 flows into the first oil injection channel 21 to lubricate the bearing 4, the other part of the lubricating oil flows into the first oil channel 22, and then is sprayed to other parts of the transmission through the injection port 23.

[0053] When the vehicle is parked and the input shaft 2 is running (such as the parking power generation mode of a hybrid vehicle), the differential gear 1 is not running and there is no oil splashing in the internal space 71, so the oil collecting box 5 cannot collect lubricating oil, but the oil pump 6 is in working state. The lubricating oil in the first oil injection channel 21 lubricates the bearing 4 and then is sprayed onto the outer wall of the oil collecting box through the second oil injection channel 24. The lubricating oil collected on the outer wall of the oil collecting box is guided to the tooth surface of the reduction gear 3 to cool and lubricate the running gear pair.

[0054] Another embodiment of the utility model further provides a transmission, comprising the above-mentioned lubrication system.

[0055] Yet another embodiment of the present invention provides a vehicle, comprising the above-mentioned transmission.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lubrication system, It is characterized in that The invention comprises a differential gear, an input shaft, a reduction gear, a bearing, an oil collecting box, an oil pump and a housing provided with an internal space; the differential gear and the oil collecting box are both installed in the internal space; the oil collecting box is provided with an oil outlet located above the reduction gear; the oil collecting box is used to collect the lubricating oil splashed by the differential gear in the internal space and spray the lubricating oil onto the reduction gear through the oil outlet; The reduction gear is rotatably mounted in the internal space via the bearing, the input shaft is fixedly connected to the reduction gear, and a first oil injection channel is provided between the input shaft, the reduction gear and the inner wall of the internal space; the oil pump is mounted on the housing and is used to drive the lubricating oil in the internal space to be sprayed onto the bearing through the first oil injection channel.

2. The lubrication system according to claim 1, It is characterized in that A second oil injection channel is provided between the bearing, the reduction gear and the inner wall of the inner space; the second oil injection channel is connected to an end of the bearing away from the first oil injection channel; The oil collecting box is arranged opposite to the second oil spraying channel, so that the lubricating oil in the second oil spraying channel is sprayed onto the outer wall of the oil collecting box and then flows back and drips onto the reduction gear.

3. The lubrication system according to claim 1, It is characterized in that The reduction gear is provided with a mounting groove, the inner wall of the internal space is provided with a protrusion, and the protrusion is provided with a plug-in hole; The protrusion extends into the installation groove, the bearing is located in the installation groove and is rotatably connected between the protrusion and the reduction gear; the input shaft is rotatably inserted in the insertion hole; the insertion hole is connected to the first oil injection channel.

4. The lubrication system according to claim 3, It is characterized in that The input shaft is provided with a first oil passage connected to the plug hole, and an injection port connected to the first oil passage.

5. The lubrication system according to claim 1, It is characterized in that The lubrication system further includes an oil cooler, and the oil pump is connected to the first oil injection channel through the oil cooler.

6. The lubrication system according to claim 5, It is characterized in that The lubrication system further comprises an oil pipe connected to the motor end, and an end of the oil cooler away from the oil pump is connected to the first oil injection channel and to an end of the oil pipe away from the motor end.

7. The lubrication system according to claim 5, It is characterized in that The lubrication system further includes a filter, and the oil pump is connected to the first oil injection channel through the filter and the oil cooler in sequence.

8. The lubrication system according to claim 7, It is characterized in that The lubrication system further includes a second oil passage and a third oil passage provided on the housing, the filter is connected to the inlet of the oil cooler through the second oil passage, and the outlet of the oil cooler is connected to the first oil injection channel through the third oil passage.

9. A transmission, It is characterized in that Comprising a lubrication system as claimed in any one of claims 1 to 8.

10. A vehicle, It is characterized in that Comprising a transmission as claimed in claim 9.

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