Gearbox, electric assembly and vehicle

Abstract

The utility model relates to a gearbox, an electric assembly and a vehicle, and the gearbox comprises a box body, an exhaust structure and a gear. A mounting cavity is formed in the box body, and a supporting body is arranged in the mounting cavity; the exhaust structure is provided with an air inlet and an air outlet, the air inlet is located in the supporting body, and the air outlet is communicated with the outside of the box body; the exhaust structure is provided with an air inlet and an air outlet which are opposite, the air inlet is located in the supporting body, and the air outlet is communicated with the outside of the box body. The gear is rotationally installed on the supporting body, an oil-gas separation channel is formed in a rotating shaft of the gear, one end of the oil-gas separation channel is communicated with the installation cavity, and the other end of the oil-gas separation channel is arranged around the gas inlet and communicated with the gas inlet. According to the gearbox provided by the invention, the technical problem that high-temperature oil gas is easily exhausted during exhausting of an existing automobile gearbox, so that oil leakage occurs can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile gearboxes, and in particular to a gearbox and a vehicle. Background Art

[0002] When the gears in the car gearbox are meshing and rotating, the temperature of the lubricating oil used to lubricate the gears will rise, causing the pressure inside the gearbox to increase. In order to ensure that the gearbox can work in a safe working environment, the gearbox is usually equipped with an exhaust channel, which connects the internal space of the gearbox and the external space of the box to keep the internal and external air pressures balanced. However, this will also cause the high-temperature oil and gas in the gearbox to be discharged outside the gearbox through the exhaust channel, causing oil leakage. Utility Model Content

[0003] The embodiment of the present application provides a gearbox to solve the technical problem that the existing automobile gearbox is prone to discharge high-temperature oil and gas while exhausting, resulting in oil leakage.

[0004] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a gearbox is provided, comprising a housing, an exhaust structure and a gear. A mounting cavity is provided in the housing, a support body is provided in the mounting cavity, the exhaust structure has an air inlet and an air outlet, the air inlet is located on the support body, and the air outlet is connected to the outside of the housing. The gear is rotatably mounted on the support body, and an oil-gas separation channel is provided in the rotating shaft of the gear, one end of the oil-gas separation channel is connected to the mounting cavity, and the other end is arranged around the air inlet and connected to the air inlet.

[0005] Optionally, an annular support platform is provided on the support body, and the annular support platform is arranged around the air inlet; the gearbox also includes a support bearing, the support bearing is fixed to the outer periphery of the annular support platform, and the rotating shaft is fixed to the outer periphery of the support bearing.

[0006] Optionally, the rotating shaft includes a connected assembly section and a guide section, the assembly section is fixed to the outer periphery of the support bearing, the guide section is conical and has a large diameter end and a small diameter end opposite to each other along its axial direction, the inner diameter of the large diameter end is larger than the inner diameter of the small diameter end, and the large diameter end is connected to the assembly section, and the small diameter end is located at the end of the guide section away from the assembly section.

[0007] Optionally, the rotating shaft further includes a separation section, the separation section is connected to the small-diameter end, and an extension length of the separation section in the axial direction thereof is not less than an extension length of the guide section.

[0008] Optionally, an oil return hole is further provided on the support body, one end of the oil return hole is connected to the oil-gas separation channel, and the other end is connected to the installation cavity, and in the direction of gravity, the oil return hole is located at the lower side of the air inlet.

[0009] Optionally, the annular support platform has an opening connected to the oil-gas separation channel, and an oil return boss is also provided on the support body. The oil return boss is located on the inner bottom wall of the annular support platform, and the upper side of the oil return boss has an inclined surface toward the opening, and one end of the oil return hole is located on the inclined surface.

[0010] Optionally, the support body and the box body are integrally formed.

[0011] Optionally, the exhaust structure is embedded in the support body and the box body.

[0012] Optionally, the exhaust structure includes a first exhaust channel and a second exhaust channel, the first exhaust channel extends along the axial direction of the rotating shaft, and one end of the first exhaust channel forms the air inlet; the second exhaust channel at least partially extends along the direction of gravity, and one end of the second exhaust channel is connected to the first exhaust channel, and the other end forms the air outlet.

[0013] According to a second aspect of the present application, an electric assembly is provided, comprising the gearbox described in any one of the above embodiments.

[0014] According to a third aspect of the present application, a vehicle is provided, comprising the electric assembly described above.

[0015] In the gearbox of the embodiment of the present application, the air inlet of the exhaust structure is arranged on the support body for supporting the gear, and the oil-gas separation channel is arranged in the rotating shaft of the gear, one end of the oil-gas separation channel is connected to the installation cavity in the box body, and the other end is arranged around the air inlet and connected to the air inlet. Then, when the gear rotates, the high-temperature oil and gas in the box body need to flow into the oil-gas separation channel in the rotating shaft of the gear before flowing to the air inlet. Because the gearbox is working, the gear rotates at a high speed, so after the high-temperature oil and gas enter the oil-gas separation channel, due to the different densities of the lubricating oil and the air, the lubricating oil in the high-temperature oil and gas will be thrown onto the inner wall of the oil-gas separation channel under the action of centrifugal force, so that the oil-gas separation is achieved, so that the lubricating oil will not flow into the air inlet with the air, and will not be discharged from the box body through the exhaust structure, which effectively solves the technical problem that the existing automobile gearbox is easy to discharge high-temperature oil and gas while exhausting, resulting in oil leakage. In addition, the gearbox of the present application uses the gears that already exist inside it to achieve the oil-gas separation of the high-temperature oil and gas, and does not need to add other components. It is not only simple in structure and easy to produce, but also low in cost.

[0016] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0018] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0019] Figure 1 This is a structural cross-sectional view of an embodiment of a gearbox of the present application;

[0020] Figure 2 yes Figure 1 A partial structural sectional view of the gearbox in FIG.

[0021] Figure 3 yes Figure 2 A partial structural sectional view of the gearbox in FIG.

[0022] Figure 4 It is a structural cross-sectional view of an embodiment of a gear in a gearbox of the present application;

[0023] Figure 5 It is a partial structural diagram of an embodiment of a gearbox of the present application.

[0024] Description of reference numerals:

[0025] 100. Gearbox;

[0026] 10. Box body; 11. Mounting cavity; 12. Support body; 121. Annular support platform; 1211. Opening; 122. Oil return hole; 123. Oil return boss; 1231. Inclined surface; 13. Front box body; 14. Rear box body;

[0027] 20. Exhaust structure; 21. First exhaust channel; 211. Air inlet; 22. Second exhaust channel; 221. Air outlet; 23. Vent plug;

[0028] 30, gear; 31, rotating shaft; 311, oil-gas separation channel; 312, assembly section; 313, flow guide section; 3131, large diameter end; 3132, small diameter end; 314, separation section; 315, central axis; 32, first gear; 33, second gear;

[0029] 40. Support bearing. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0031] First, when the gears in the car gearbox are meshing and rotating, the temperature of the lubricating oil used to lubricate the gears will rise, causing the pressure inside the gearbox to increase. In order to ensure that the gearbox can work in a safe working environment, the gearbox is usually equipped with an exhaust channel, which connects the internal space of the gearbox and the external space of the box to keep the internal and external air pressures balanced. However, this will also cause the high-temperature oil and gas in the gearbox to be discharged outside the gearbox through the exhaust channel, causing oil leakage.

[0032] In order to solve the above technical problems, according to the first aspect of the present application, Figure 1 As shown, the present application provides a gearbox 100 , which mainly includes a housing 10 , an exhaust structure 20 and a gear 30 .

[0033] The housing 10 is provided with a mounting cavity 11, and the mounting cavity 11 is provided with a support body 12. Specifically, the housing 10 is a shell structure for mounting components such as a gear system, a rotating shaft (such as an input shaft, an output shaft, etc.), and a bearing in the gearbox 100. Figure 1 In the structural scheme shown, the housing 10 includes a front housing 13 and a rear housing 14. The front housing 13 and the rear housing 14 are assembled to enclose a mounting cavity 11. The cavity portion in the front housing 13 is usually used to mount an input shaft (also called a main shaft) and a corresponding gear system, and the cavity portion in the rear housing 14 is usually used to mount an output shaft (also called a secondary shaft) and a corresponding gear system. The input shaft is connected to the engine, and transmits power to the output shaft through the gear system thereon. The output shaft is connected to the differential, and then transmits power to the wheels to achieve wheel rotation.

[0034] In this embodiment, a support body 12 is further provided in the mounting cavity 11, and the support body 12 is used to mount and support components such as the gear 30, the input shaft, and the output shaft. Figure 1 As shown, the support body 12 is integrally formed at one end of the front box body 13 . After the front box body 13 and the rear box body 14 are assembled, the support body 12 is located in the installation cavity 11 .

[0035] Of course, in other embodiments, the support body 12 may be integrally formed with the rear box body 14, or may be an independent component from the box body 10, and the support body 12 may be fixed in the installation cavity 11 in the box body 10 during assembly.

[0036] It should be noted here that lubricating oil for lubricating the gear 30 is generally provided in the installation cavity 11, so the corresponding oil circuit structure, sealing structure, etc. need to be designed in the installation cavity 11. The specific design can refer to the relevant existing technology, which will not be introduced in detail here.

[0037] like Figure 1 As shown, in order to ensure the air pressure balance inside and outside the box 10, the gearbox 100 of the present application is also provided with an exhaust structure 20, the exhaust structure 20 has a relative air inlet 211 and an air outlet 221, the air inlet 211 is located on the support body 12, and the air outlet 221 is connected to the outside of the box 10.

[0038] Specifically, Figure 2 As shown, in one embodiment, the support body 12 and the box body 10 are integrally formed, and the exhaust structure 20 is embedded in the support body 12 and the box body 10, that is, the exhaust structure 20 is an airway structure formed in the support body 12 and the box body 10, so the exhaust structure 20 can be formed by drilling holes on the support body 12 and the box body 10, and the air inlet 211 is located on the support body 12 and communicated with the installation cavity 11, and the air outlet 221 is located on the box body 10 and communicated with the external atmosphere of the box body 10.

[0039] Of course, in other embodiments, the exhaust structure 20 may also be an air pipe structure independent of the support body 12 and the box body 10. In this case, the exhaust structure 20 may be disposed in the installation cavity 11, and one end of the exhaust structure 20 is fixed on the support body 12, and an air inlet 211 is formed on the support body 12, and the other end is passed through the surface of the box body 10 to communicate with the outside of the box body 10.

[0040] When the pressure in the installation cavity 11 increases, the gas in the installation cavity 11 may flow to the outside of the box body 10 through the exhaust structure 20 to keep the air pressure inside and outside the box body 10 balanced.

[0041] It should be noted that in order to prevent external dust and impurities from entering the installation cavity 11 through the air outlet 221, Figure 1 or Figure 2 As shown, the air outlet 221 of the exhaust structure 20 may be equipped with a vent plug 23, and a filter may be provided on the vent plug 23 to prevent external dust and impurities from entering the box body 10 while allowing the gas in the box body 10 to be discharged. The specific type and structure of the vent plug 23 can be selected according to the relevant prior art and are not specifically limited here.

[0042] Crucially, in the present application, the gear 30 is rotatably mounted on the support body 12 , and an oil-gas separation channel 311 is provided in the rotating shaft 31 of the gear 30 , one end of the oil-gas separation channel 311 is connected to the mounting cavity 11 , and the other end is arranged around the air inlet 211 and connected to the air inlet 211 .

[0043] Specifically, in this embodiment, reference may be made to Figure 1 The gear 30 is located in the rear housing 14, and the shaft 31 of the gear 30 is the output shaft (i.e., the secondary shaft), and the gear 30 can be integrally formed with the shaft 31, or can be detachably assembled with the shaft 31. During installation, the gear 30 is rotatably mounted on the support body 12 through the shaft 31. Specifically, the support body 12 can be provided with an assembly boss or an assembly hole, and the shaft 31 of the gear 30 is rotatably mounted outside the assembly boss or inside the assembly hole through a bearing.

[0044] In the present embodiment, an oil-gas separation channel 311 is provided in the rotating shaft 31 of the gear 30. The oil-gas separation channel 311 penetrates the rotating shaft 31 along the axial direction of the rotating shaft 31, and one end of the oil-gas separation channel 311 is connected to the mounting cavity 11, and the other end is arranged around the air inlet 211 of the exhaust structure 20 and is connected to the air inlet 211.

[0045] Specifically, when an assembly boss is provided on the support body 12, the assembly boss can partially extend into the oil-gas separation channel 311, and the rotating shaft 31 of the gear 30 can be rotatably sleeved on the outside of the assembly boss through a bearing. The air inlet 211 of the exhaust structure 20 is provided on the end face of the assembly boss, so that the oil-gas separation channel 311 can be connected with the air inlet 211.

[0046] Alternatively, when an assembly hole is provided on the support body 12, the air inlet 211 of the exhaust structure 20 can be provided at the bottom of the assembly hole, and the rotating shaft 31 and part of the gear 30 extend into the assembly hole and are rotatably installed in the assembly hole through the bearing, so that the oil-gas separation channel 311 and the air inlet 211 can be connected.

[0047] It can be understood that when the gear 30 rotates, the high-temperature oil and gas in the housing 10 need to first flow into the oil-gas separation channel 311 in the rotating shaft 31 of the gear 30 before flowing to the air inlet 211. Because the gear 30 rotates at high speed when the gearbox 100 is working, after the high-temperature oil and gas enter the oil-gas separation channel 311, due to the different densities of the lubricating oil and the air, the lubricating oil in the high-temperature oil and gas will be thrown onto the inner wall of the oil-gas separation channel 311 under the action of centrifugal force, thereby achieving oil-gas separation, so that the lubricating oil will not flow into the air inlet 211 along with the air, and will not be discharged outside the housing 10 through the exhaust structure 20, which effectively solves the technical problem that the existing automobile gearbox 100 is easy to discharge high-temperature oil and gas while exhausting, resulting in oil leakage.

[0048] In addition, the gearbox 100 of the present application utilizes the gear 30 already provided therein to achieve oil-gas separation of high-temperature oil and gas, and does not require the installation of other additional components. It is not only simple in structure and easy to produce, but also low in cost.

[0049] Of course, since there are usually multiple speed gears 30 in the gearbox 100, the gear provided with the oil-gas separation channel 311 may also be a gear installed on the input shaft (i.e., the main shaft), or the exhaust channel may be provided with multiple air inlets 211, and the gear provided with the oil-gas separation channel may also be provided with multiple oil-gas separation channels, and the multiple oil-gas separation channels 311 are respectively connected to the multiple air inlets 211. In short, the specific setting method can be selected according to needs.

[0050] Optionally, in one embodiment, please combine Figure 5 and Figure 2 The support body 12 is provided with an annular support platform 121, which is integrally formed with the support body 12 and is arranged around the air inlet 211. The gearbox 100 further includes a support bearing 40, which is fixed to the outer periphery of the annular support platform 121, that is, the support bearing 40 can be interference fitted to the outer periphery of the annular support platform 121, or can be transitionally fitted to the outer periphery of the annular support platform 121, and the rotating shaft 31 is fixed to the outer periphery of the support bearing 40.

[0051] Specifically, the support bearing 40 is a ball bearing, that is, the support bearing 40 has an inner ring, an outer ring and balls arranged between the inner ring and the outer ring. The inner ring is transitionally or interference-fitted on the outer periphery of the annular support platform 121, and the outer ring can rotate relative to the inner ring. The rotating shaft 31 of the gear 30 is interference-fitted on the outer periphery of the outer ring, thereby realizing the rotatable installation of the gear 30 on the support body 12.

[0052] It can be understood that in this embodiment, an annular support platform 121 is set on the support body 12, and the rotating shaft 31 of the gear 30 is assembled on the annular boss through the support bearing 40. In this way, the rotating shaft 31 of the gear 30 and the annular support platform 121 can better surround the air inlet 211, thereby preventing the high-temperature oil and gas from flowing directly to the air inlet 211 without passing through the oil-gas separation channel 311 in the rotating shaft 31, and ensuring that the high-temperature oil and gas flowing to the air inlet 211 will pass through the oil-gas separation channel 311, and the lubricating oil and air in the high-temperature oil and gas will be separated by centrifugal force in the oil-gas separation channel 311, so that the lubricating oil will not flow into the exhaust channel with the air and be discharged outside the box 10.

[0053] Optionally, in one embodiment, if Figure 3 and Figure 4As shown, the rotating shaft 31 includes a connected assembly section 312 and a guide section 313. The assembly section 312 is interference fitted on the outer periphery of the support bearing 40. The guide section 313 is conical and has a large diameter end 3131 and a small diameter end 3132 opposite to each other along its axial direction. The inner diameter of the large diameter end 3131 is larger than the inner diameter of the small diameter end 3132, and the large diameter end 3131 is connected to the assembly section 312, and the small diameter end 3132 is located at the end of the guide section 313 away from the assembly section 312.

[0054] Specifically, Figure 4 As shown, the assembly section 312 extends parallel to the central axis 315 of the rotating shaft 31 , the guide section 313 is cone-shaped, and the side wall of the guide section 313 gradually inclines toward the central axis 315 of the rotating shaft 31 while extending away from the assembly section 312 .

[0055] It can be understood that in this embodiment, the rotating shaft 31 includes a guide section 313. When the lubricating oil in the high-temperature oil and gas is thrown onto the inner wall of the oil-gas separation channel 311 under the action of centrifugal force, the lubricating oil can flow along the inner wall of the guide section 313 to the large diameter end 3131 of the guide section 313. Since the support bearing 40 is located at the large diameter end 3131, the lubricating oil can flow to the support bearing 40 and lubricate the support bearing 40, so that the rotation of the gear 30 is smoother.

[0056] It should be noted that the end surface of the support bearing 40 facing the support body 12 can be spaced from the support body 12, so that after lubricating the support bearing 40, the lubricating oil can flow back into the installation cavity 11 through the gap between the balls, thereby realizing the recycling of the lubricating oil.

[0057] Optionally, in one embodiment, if Figure 3 and Figure 4 As shown, the rotating shaft 31 further includes a separation section 314 , which is connected to the small diameter end 3132 , and an extension length of the separation section 314 in the axial direction is not less than an extension length of the guide section 313 .

[0058] Specifically, in the present embodiment, because the average inner diameter of the guide section 313 is relatively large, in order to avoid an insufficient oil-gas separation effect, a separation section 314 is further connected to the side of the guide section 313 away from the assembly section 312. The inner diameter of the separation section 314 is smaller than the average inner diameter of the guide section 313, and the length of the separation section 314 is not less than the length of the guide section 313. Therefore, when the high-temperature oil and gas flow through the separation section 314, better and more complete oil-gas separation can be achieved, thereby achieving a better oil-gas separation effect.

[0059] It should be noted that after the high-temperature oil and gas are separated in the separation section 314, part of the lubricating oil will flow away from the guide section 313 and out of the oil-gas separation channel 311, and finally flow back into the installation cavity 11, and part of the lubricating oil will flow into the guide section 313 and flow onto the support bearing 40 to lubricate the support bearing 40. The actual flow direction of the lubricating oil is determined by the force on the lubricating oil itself, but no matter where it flows, it will not affect the flow of the lubricating oil back to the installation cavity 11, so that the lubricating oil can be reused.

[0060] It should also be noted that in Figure 3 and Figure 4 In the structural scheme shown, the gear 30 includes a first gear 32 and a second gear 33. The first gear 32 is integrally formed outside the assembly section 312, and the first gear 32 is used to mesh with the gear 30 on the motor shaft. The second gear 33 is integrally formed outside the separation section 314, and the second gear 33 is used to mesh with the main reduction gear 30 in the differential. This ensures that when the gearbox 100 is in use, the gear 30 always keeps rotating, so that the oil-gas separation of the high-temperature oil and gas can be achieved through centrifugal force.

[0061] It can be understood that, because the gap between the balls in the support bearing 40 is small, the speed at which the lubricating oil flows back into the mounting cavity 11 through the gap between the balls is relatively slow, which may cause the lubricating oil to accumulate in the guide section 313. When the amount of lubricating oil accumulated is large, it will not only cause the lubricating oil to accumulate in the guide section 313, resulting in a low reuse rate of the lubricating oil, but the lubricating oil may also flow into the exhaust structure 20 through the air inlet 211, which may make it easy for the air to flow out of the box 10, or the lubricating oil may block the exhaust structure 20, resulting in poor exhaust.

[0062] Therefore, optionally, in one embodiment, for the above problem, as Figure 3 As shown, the support body 12 is also provided with an oil return hole 122 , one end of the oil return hole 122 is connected to the oil-gas separation channel 311 , and the other end is connected to the installation cavity 11 , and in the direction of gravity, the oil return hole 122 is located at the lower side of the air inlet 211 .

[0063] Specifically, in this embodiment, the oil return hole 122 is formed by drilling a hole on the support body 12, and one end of the oil return hole 122 is located in the annular support platform 121, and can be connected to the oil-gas separation channel 311, and the other end passes through the support body 12 and is connected to the installation cavity 11, and the oil return hole 122 is located at the lower side of the air inlet 211 along the gravity direction. Therefore, when there is a lot of lubricating oil in the guide section 313 and flows into the annular support platform 121, the lubricating oil will flow back to the installation cavity 11 through the oil return hole 122, which can avoid the accumulation of lubricating oil in the guide section 313 and the annular support platform 121, and can also avoid the situation where the lubricating oil flows to the air inlet 211 and flows into the exhaust structure 20.

[0064] It should be noted that the size, length, extension direction, etc. of the oil return hole 122 can be flexibly set according to actual conditions, as long as the lubricating oil can flow from the guide section 313 back to the installation cavity 11 through the oil return hole 122.

[0065] For example, optionally, in one embodiment, Figure 3 and Figure 5 As shown, the annular support platform 121 has an opening 1211 connected to the oil-gas separation channel 311, and an oil return boss 123 is also provided on the support body 12. The oil return boss 123 is located on the inner bottom wall of the annular support platform 121, and the upper side of the oil return boss 123 has an inclined surface 1231 facing the opening 1211, and one end of the oil return hole 122 is located on the inclined surface 1231.

[0066] Specifically, in this embodiment, if Figure 3 and Figure 5 As shown, the support body 12 is also provided with an oil return boss 123, which is located on the inner bottom wall of the annular support platform 121, that is, the oil return boss 123 is located below the air inlet 211, and the oil return boss 123 also partially covers the bottom side wall of the annular support platform 121. Figure 5 As shown, the upper side surface of the oil return boss 123 extends obliquely between the end surface of the support body 12 facing the opening 1211 and the inner bottom wall of the annular support platform 121, thereby forming an inclined surface 1231, that is, one end of the inclined surface 1231 in the inclination direction is located on the end surface of the support body 12 facing the opening 1211, and the other end is located on the inner bottom surface of the annular support platform 121, and the inclined surface 1231 is inclined downward toward the opening 1211.

[0067] Furthermore, in this embodiment, one end of the oil return hole 122 is located on the inclined surface 1231 .

[0068] It can be understood that in the present embodiment, the oil return boss 123 is provided, and the oil return boss 123 has an inclined surface 1231 facing the opening 1211, so that it is convenient for the drill bit to extend into the annular boss and process the oil return hole 122, making the processing of the oil return hole 122 more convenient. At this time, the processed oil return hole 122 extends obliquely relative to the direction of gravity.

[0069] It should be noted here that in order to prevent the high-temperature oil and gas from flowing directly to the air inlet 211 through the oil return hole 122, the inner diameter of the oil return hole 122 can be set to be smaller, so that when the pressure in the installation cavity 11 increases, the high-temperature oil and gas can preferentially flow to the air inlet 211 through the oil-gas separation channel 311.

[0070] Optionally, in one embodiment, if Figure 1 or Figure 2 As shown, the support body 12 is integrally formed with the housing 10, so that the support body 12 can be more stably fixed in the installation cavity 11, thereby better supporting the gear 30. Specifically, the housing 10 includes a front housing 13 and a rear housing 14 spliced ​​to each other, and the support body 12 is integrally formed at one end of the front housing 13. When the rear housing 14 and the front housing 13 are spliced ​​together and enclose the installation cavity 11, the support body 12 is naturally located in the installation cavity 11.

[0071] Optionally, in one embodiment, if Figure 3 As shown, the exhaust structure 20 is embedded in the support body 12 and the box body 10. Specifically, the exhaust structure 20 is formed by drilling air passages in the box body 10 and the support body 12, which can make the structure of the gearbox 100 simpler and the cost lower.

[0072] Optionally, in one embodiment, if Figure 3 As shown, the exhaust structure 20 includes a first exhaust channel 21 and a second exhaust channel 22. The first exhaust channel 21 extends along the axial direction of the rotating shaft 31, and an air inlet 211 is formed at one end of the first exhaust channel 21; the second exhaust channel 22 at least partially extends along the gravity direction, and one end of the second exhaust channel 22 is connected to the first exhaust channel 21, and the other end forms an air outlet 221.

[0073] Specifically, in this embodiment, the first exhaust channel 21 extends in the horizontal direction, and the second exhaust channel 22 extends in the gravity direction, that is, the exhaust structure 20 extends in a bent shape as a whole, so that when the gas in the installation cavity 11 is discharged, if there is a small amount of lubricating oil in the gas, the lubricating oil is easy to adhere to the inner wall of the exhaust channel at the bend, and then will not flow out of the box body 10 with the air. In addition, when a small amount of high-temperature oil and gas enters the oil-gas separation channel 311 through the oil return hole 122, the bent and extended exhaust structure 20 will also make it easy for the lubricating oil to adhere to the inner wall of the exhaust channel at the bend, avoiding the situation where the oil and gas are directly discharged and cause oil leakage from the box body.

[0074] In addition, because the second air passage at least partially extends in the direction of gravity, when there is a small amount of lubricating oil in the gas, the lubricating oil can be retained in the exhaust passage under the action of its own gravity, preventing the lubricating oil from flowing out of the box 10 along with the air.

[0075] According to a second aspect of the present application, an electric assembly (not shown) is provided, which includes a gearbox 100 according to any one of the above embodiments, so that the vehicle has all the beneficial effects of the above gearbox 100, which will not be described in detail in the present disclosure.

[0076] According to the third aspect of the present application, a vehicle (not shown) is provided, which includes the above electric assembly, and the electric assembly includes the gearbox 100 of any one embodiment, so the vehicle has all the beneficial effects of the above gearbox 100, which will not be repeated in this disclosure.

[0077] It should be noted that the vehicle may be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and the present disclosure does not make any specific limitation on this.

[0078] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0079] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0080] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0081] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A gearbox, characterized in that: include: A box body, wherein a mounting cavity is provided in the box body, and a support body is provided in the mounting cavity; an exhaust structure, the exhaust structure having an air inlet and an air outlet, the air inlet being located on the support body, and the air outlet being communicated with the outside of the box body; and A gear is rotatably mounted on the support body, and an oil-gas separation channel is provided in the rotating shaft of the gear, one end of the oil-gas separation channel is communicated with the installation cavity, and the other end is arranged around the air inlet and communicated with the air inlet.

2. The gearbox according to claim 1, characterized in that: The support body is provided with an annular support platform, and the annular support platform is arranged around the air inlet; The gearbox further comprises a support bearing, wherein the support bearing is fixed to the outer periphery of the annular support platform, and the rotating shaft is fixed to the outer periphery of the support bearing.

3. The gearbox according to claim 2, characterized in that: The rotating shaft includes an assembly section and a guide section connected to each other, the assembly section is fixed to the outer periphery of the support bearing, the guide section is cone-shaped and has a large diameter end and a small diameter end opposite to each other along its axial direction, the inner diameter of the large diameter end is larger than the inner diameter of the small diameter end, and the large diameter end is connected to the assembly section, and the small diameter end is located at one end of the guide section away from the assembly section.

4. The gearbox according to claim 3, characterized in that: The rotating shaft further includes a separation section, which is connected to the small-diameter end, and an extension length of the separation section in the axial direction thereof is not less than an extension length of the guide section.

5. The gearbox according to claim 3, characterized in that: The support body is also provided with an oil return hole, one end of which is connected to the oil-gas separation channel, and the other end is connected to the installation cavity, and in the direction of gravity, the oil return hole is located at the lower side of the air inlet.

6. The gearbox according to claim 5, characterized in that: The annular support platform has an opening connected to the oil-gas separation channel, and the support body is also provided with an oil return boss, the oil return boss is located on the inner bottom wall of the annular support platform, and the upper side of the oil return boss has an inclined surface toward the opening, and one end of the oil return hole is located on the inclined surface.

7. The gearbox according to any one of claims 1 to 6, characterized in that: The support body and the box body are integrally formed.

8. The gearbox according to claim 7, characterized in that: The exhaust structure is embedded in the support body and the box body.

9. The gearbox according to claim 8, characterized in that: The exhaust structure includes a first exhaust channel and a second exhaust channel, the first exhaust channel extends along the axial direction of the rotating shaft, and one end of the first exhaust channel forms the air inlet; the second exhaust channel at least partially extends along the gravity direction, and one end of the second exhaust channel is connected to the first exhaust channel, and the other end forms the air outlet.

10. An electric assembly, characterized in that: A gearbox comprising any one of claims 1-9.

11. A vehicle, characterized in that: Includes the electric assembly as described in claim 10.

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