Transmission, electric drive system and vehicle

Abstract

The utility model discloses a speed changer, an electric driving system and a vehicle, and relates to the technical field of vehicles, the speed changer comprises a shell provided with a speed changing cavity and an opening communicated with the speed changing cavity; the oil guide cover plate is arranged at the opening, the surface, facing the speed change cavity, of the oil guide cover plate is provided with an oil spraying channel, the surface, back to the speed change cavity, of the oil guide cover plate is provided with an oil supply pipeline, the oil spraying direction of the oil spraying channel faces the speed change cavity, and the oil spraying channel is communicated with the oil supply pipeline. According to the technical scheme, the manufacturing difficulty of the lubricating structure is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a transmission, electric drive system and vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicles and electric drive technology, electric drive system is changing towards high power density, light weight and integration. In the design of transmission of electric drive system, the optimization of lubrication system plays a key role in transmission efficiency, component life and overall reliability. The lubrication scheme of traditional transmission usually relies on the design of complex internal oil channel on the aluminum alloy shell, and the lubrication and heat dissipation of gear, bearing and other moving parts are realized by pressure oil supply or splash lubrication. In order to meet the needs of multiple lubrication points, a large number of oil channel structures need to be opened on the shell, which increases the difficulty of casting and machining. SUMMARY

[0003] The main purpose of the utility model is to provide a kind of transmission, electric drive system and vehicle, to reduce the manufacturing difficulty of lubrication structure.

[0004] To achieve the above purpose, the utility model embodiment proposes a kind of transmission, the transmission includes:

[0005] Shell, provided with transmission cavity and the opening communicated with the transmission cavity;And

[0006] Oil guide cover plate, set in the opening, the surface of the oil guide cover plate facing the transmission cavity is provided with oil injection channel, the surface of the oil guide cover plate away from the transmission cavity is provided with oil supply pipeline, the oil injection direction of the oil injection channel is towards the transmission cavity and is communicated with the oil supply pipeline.

[0007] In an embodiment, the transmission further includes input shaft and input bearing connected with the input shaft, the input shaft and the input bearing are all arranged in the transmission cavity;The oil injection channel includes first oil injection hole penetrating through the oil guide cover plate and being communicated with the oil supply pipeline, and the setting position of the first oil injection hole corresponds to the input bearing.

[0008] In an embodiment, the transmission further includes intermediate shaft arranged in the transmission cavity and intermediate bearing connected with the intermediate shaft, the surface of the oil guide cover plate facing the transmission cavity is provided with oil collection structure, the oil collection structure is arranged around the first oil injection hole and is communicated with the first oil injection hole, the shell is provided with second oil injection hole, the second oil injection hole penetrates through the shell and is communicated with the oil collection structure, and the setting position of the second oil injection hole corresponds to the intermediate bearing.

[0009] In an embodiment, the oil collecting structure comprises an oil collecting ring protruding from the oil guide cover plate, an inner side of the oil collecting ring forms a recessed space, the first oil injection hole is located at the inner side of the oil collecting ring, and a part of the oil collecting ring protrudes from the recessed space to form an oil collecting recess, the oil collecting recess is located at the bottom of the oil guide cover plate and communicates with the second oil injection hole.

[0010] In an embodiment, the transmission further comprises a differential bearing arranged in the transmission cavity, the oil injection channel further comprises a third oil injection hole penetrating through the oil guide cover plate, the third oil injection hole is arranged at one side of the first oil injection hole and is arranged independently from the first oil injection hole, the shell is provided with a fourth oil injection hole, the fourth oil injection hole is arranged at a position corresponding to the differential bearing and penetrates through the shell, and the fourth oil injection hole and the third oil injection hole are aligned and communicated with each other.

[0011] In an embodiment, the transmission further comprises a sealing ring arranged between the oil guide cover plate and the shell and located at the outer side of the third oil injection hole.

[0012] In an embodiment, the transmission further comprises a gear set arranged in the transmission cavity and an oil injection pipeline arranged corresponding to the gear set, the oil injection channel further comprises a fifth oil injection hole penetrating through the oil guide cover plate, the shell is provided with a sixth oil injection hole, the sixth oil injection hole penetrates through the shell and is aligned and communicated with the fifth oil injection hole, and the oil injection pipeline is connected with the shell and communicates with the sixth oil injection hole.

[0013] In an embodiment, the gear set comprises at least one of a primary gear, a secondary gear and a half shaft gear, the oil injection pipeline comprises at least one of a first oil injection sub-pipeline, a second oil injection sub-pipeline and a third oil injection sub-pipeline, and the first oil injection sub-pipeline, the second oil injection sub-pipeline and the third oil injection sub-pipeline are all communicated with the sixth oil injection hole; wherein the first oil injection sub-pipeline is directed towards the primary gear, the second oil injection sub-pipeline is directed towards the secondary gear, and the third oil injection sub-pipeline is directed towards the half shaft gear.

[0014] In an embodiment, the oil injection pipeline further comprises a main oil injection pipeline, the main oil injection pipeline is communicated with the sixth oil injection hole, and the first oil injection sub-pipeline, the second oil injection sub-pipeline and the third oil injection sub-pipeline are all connected with the main oil injection pipeline.

[0015] To achieve the above object, an embodiment of the utility model provides a kind of electric drive system, and the electric drive system includes the transmission described above.

[0016] To achieve the above object, an embodiment of the utility model provides a kind of vehicle, and the vehicle includes the electric drive system described above.

[0017] The technical scheme of the present application sets the oil guide cover plate at the opening of the shell, and sets the oil injection channel on the surface of the oil guide cover plate facing the gear shift cavity, so that the lubricating oil can be accurately injected into the gear shift cavity through the oil injection channel, precise lubrication is realized, effective supply of lubricating oil is ensured, lubrication efficiency is improved, the service life of the gear shift is prolonged, and the working performance and reliability are improved. Moreover, under the premise of ensuring the lubrication effect, the number of oil channels on the shell is reduced, the whole lubrication structure is simpler, the design complexity and processing difficulty of the shell are reduced, the manufacturing process is simplified, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in these drawings without creative labor.

[0019] Figure 1 It is an angle structure schematic view of the oil guide cover plate in the gear shift embodiment of the present application.

[0020] Figure 2 It is another angle structure schematic view of the oil guide cover plate in the gear shift embodiment of the present application.

[0021] Figure 3 It is a perspective structure schematic view of the gear shift embodiment of the present application.

[0022] Figure 4 It is a partial structure schematic view of Figure 3

[0023] Figure 5 It is a structure schematic view of the oil injection pipeline in the gear shift embodiment of the present application.

[0024] Figure 6 It is an angle internal structure schematic view of the gear shift embodiment of the present application.

[0025] Figure 7 It is another angle internal structure schematic view of the gear shift embodiment of the present application.

[0026] Explanation of reference numerals:

[0027] ​10, housing; 11, second oil injection hole; 12, fourth oil injection hole; 13, sixth oil injection hole; 14, differential window; 20, oil guide cover plate; 21, oil injection channel; 211, first oil injection hole; 212, third oil injection hole; 213, fifth oil injection hole; 30, oil collection structure; 31, oil collection ring; 32, oil collection recess; 40, oil injection pipeline; 41, first oil injection sub-pipeline; 42, second oil injection sub-pipeline; 43, third oil injection sub-pipeline; 44, main oil injection pipeline; 50, oil supply pipeline; 60, gear set; 61, primary gear meshing region; 62, secondary gear meshing region.

[0028] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the embodiments of the present application.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0031] In addition, the description of "first", "second" and the like in the embodiments of the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0032] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] In addition, the technical solutions of various embodiments of the utility model can be combined with each other, but must be based on the fact that a person having ordinary skill in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the utility model embodiments.

[0034] In the transmission design of the electric drive system, the optimization of the lubrication system plays a key role in transmission efficiency, component life and overall reliability, and currently, an active lubrication scheme is usually adopted to reduce the oil stirring loss of the transmission system. When the electric drive system is working, the lubricating oil pumped out by the oil pump is guided to the bearing and gear meshing position through the shell oil channel or the built-in metal oil pipe, so as to realize the lubrication of the transmission system and ensure the normal work of the transmission system.

[0035] However, in order to realize the lubrication of each bearing, many oil channels need to be added on the shell, and some of the oil channels are relatively long. With the increase in the number of oil channels on the shell, the design, casting and machining difficulty of the shell will also be correspondingly improved, which increases the design cost and production cost of the shell. In the active lubrication scheme of arranging the metal oil pipe inside the cavity, in order to realize the lubrication of each bearing and gear, many gears, oil baffle plates and other components need to be avoided, which increases the occupied space and the arrangement difficulty.

[0036] Therefore, the utility model embodiment provides a transmission, an electric drive system and a vehicle, by setting a guide oil cover plate at the opening of the shell, and setting an oil injection channel on the surface of the guide oil cover plate facing the transmission cavity, the number of oil channels arranged on the shell is reduced under the premise of ensuring the lubrication effect, the whole lubrication structure is simpler, so as to reduce the design complexity and machining difficulty of the shell, simplify the manufacturing process and reduce the production cost.

[0037] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings.

[0038] As shown in Figure 1 , Figure 2 and Figure 6 , Figure 7 , the utility model embodiment provides a transmission, which comprises:

[0039] a shell 10 provided with a transmission cavity and an opening communicating with the transmission cavity; and

[0040] An oil guide cover plate 20 is arranged at the opening, a surface of the oil guide cover plate 20 facing the transmission cavity is provided with an oil injection channel 21, a surface of the oil guide cover plate 20 facing away from the transmission cavity is provided with an oil supply pipeline 50, and the oil injection direction of the oil injection channel 21 is towards the transmission cavity and is communicated with the oil supply pipeline 50. Optionally, the oil guide cover plate 20 is detachably arranged at the opening, for example, the oil guide cover plate 20 and the shell 10 can be connected by bolts. In order to improve the sealing performance of the connection between the oil guide cover plate 20 and the shell 10, a sealing ring can also be arranged around the opening, and the oil guide cover plate 20 and the shell 10 are sealingly connected through the sealing ring, so that the sealing performance is better, oil leakage can be prevented, and dust and the like can also be prevented from entering the transmission cavity, thereby reducing the adverse effects on various transmission components in the transmission cavity. Optionally, the oil supply pipeline 50 can be arranged to deliver the oil cooled by the oil cooler to the oil injection channel 21. In an embodiment, the oil guide cover plate 20 and the oil supply pipeline 50 can be integrally formed, and the structure is simpler.

[0041] In the technical scheme adopted in this embodiment, the oil guide cover plate 20 is arranged at the opening of the shell 10, and the oil injection channel 21 is arranged on the surface of the oil guide cover plate 20 facing the transmission cavity, so that the lubricating oil can be accurately injected into the transmission cavity through the oil injection channel 21, precise lubrication is achieved, the effective supply of lubricating oil is ensured, the lubrication efficiency is improved, the service life of the transmission is prolonged, and the working performance and reliability are improved. Moreover, under the premise of ensuring the lubrication effect, the number of oil channels arranged on the shell 10 is reduced, the entire lubrication structure is simpler, the design complexity and processing difficulty of the shell 10 are reduced, the manufacturing process is simplified, and the production cost is reduced. At the same time, the oil level position can be greatly reduced, the oil stirring loss of the gear is reduced, and the efficiency of the entire electric drive system is improved.

[0042] In this embodiment, the transmission can be a commonly used parallel shaft or skew shaft reducer, and the specific structure is not described in detail. It can be understood that the transmission assembly is arranged in the transmission cavity, and the transmission assembly adopts a parallel shaft or skew shaft reduction structure. Optionally, the oil guide cover plate 20 is a plate-shaped structure, and the shape thereof is not limited, as long as it is adapted to the shell of the transmission.

[0043] In an embodiment of the utility model, refer to Figure 1The transmission further comprises an input shaft and an input bearing connected with the input shaft, and the input shaft and the input bearing are arranged in the transmission cavity; the oil injection channel 21 comprises a first oil injection hole 211 penetrating through the oil guide cover plate 20, and the first oil injection hole 211 is arranged at a position corresponding to the input bearing, and it can be understood that the oil injection direction of the first oil injection hole 211 is towards the input bearing. Specifically, the transmission comprises an input shaft arranged in the transmission cavity for rotation, and the input shaft is connected with a power source and rotates under the driving of the power source. Generally, the input shaft is fixed to the housing 10 through an input bearing. Therefore, the oil injection channel 21 comprises the first oil injection hole 211 penetrating through the housing 10, one end of the first oil injection hole 211 is connected with the oil supply pipeline 50, and the other end of the first oil injection hole 211 is towards the input bearing, so that the oil in the oil supply pipeline 50 can be guided to the input bearing, thereby realizing lubrication or cooling of the input bearing and improving the smoothness of rotation of the input shaft.

[0044] In an embodiment of the utility model, refer to Figure 1 And Figure 3 The transmission further comprises an intermediate shaft arranged in the transmission cavity and an intermediate bearing connected with the intermediate shaft, the surface of the oil guide cover plate 20 facing the transmission cavity is provided with an oil collecting structure 30, the oil collecting structure 30 is arranged around the first oil injection hole 211 and is communicated with the first oil injection hole 211, the housing 10 is provided with a second oil injection hole 11, the second oil injection hole 11 penetrates through the housing 10 and is communicated with the oil collecting structure 30, and the second oil injection hole 11 is arranged at a position corresponding to the intermediate bearing, that is, the oil injection direction of the second oil injection hole 11 is towards the intermediate bearing. Specifically, the transmission further comprises an intermediate shaft arranged in the transmission cavity for transmission or speed reduction and capable of rotating under the driving of the input shaft. Generally, the intermediate shaft is fixed to the housing 10 through an intermediate bearing. Therefore, the oil collecting structure 30 is arranged in the embodiment, the second oil injection hole 11 is arranged on the housing 10, the second oil injection hole 11 is arranged at a position corresponding to the intermediate bearing, the oil collecting structure 30 is communicated with the second oil injection hole 11, and the second oil injection hole 11 is towards the intermediate bearing, so that the oil can be guided to the intermediate bearing, thereby realizing lubrication and cooling of the intermediate bearing. Specifically, the oil collecting structure 30 is communicated with the first oil injection hole 211, so that part of the oil in the first oil injection hole 211 is guided into the oil collecting structure 30 and the other part is guided to the input bearing, the first oil injection hole 211 can guide oil to the oil collecting structure 30 and the input bearing at the same time, the number of oil holes or oil channels arranged on the oil guide cover plate 20 is simplified, and the complexity of the structure is further reduced, and the processing and manufacturing are more convenient.

[0045] In an embodiment of the utility model, refer to Figure 1The oil collecting structure 30 comprises an oil collecting ring 31 protruding from the oil guide cover plate 20, the inner side of the oil collecting ring 31 is formed with a recessed space, the first oil injection hole 211 is located at the inner side of the oil collecting ring 31, and the bottom of the oil collecting ring 31 is protruded to form an oil collecting recess 32, which is located at the bottom of the oil guide cover plate 20 and communicates with the second oil injection hole 11. Specifically, the oil collecting structure 30 comprises the oil collecting ring 31, the oil collecting ring 31 is protruded from the surface of the oil guide cover plate 20 towards the transmission cavity, and the first oil injection hole 211 is located at the inner side of the oil collecting ring 31. Since the bottom of the oil collecting ring 31 is protruded to form the oil collecting recess 32 away from the recessed space, part of the oil sprayed from the first oil injection hole 211 flows along the inner surface of the oil collecting ring 31 to the oil collecting recess 32 under the action of gravity. The second oil injection hole 11 is opposite to the oil collecting recess 32, and the oil entering the oil collecting recess 32 can be sprayed to the intermediate bearing through the second oil injection hole 11 to realize the lubrication and cooling of the intermediate bearing. In the embodiment, the gravity is used to guide part of the oil from the first oil injection hole 211 to the oil collecting recess 32 and the second oil injection hole 11, and a complex oil channel is not needed, so that the structure is further simplified and the machining difficulty is reduced.

[0046] In an embodiment of the utility model, referring to Figure 1 and Figure 4 , the transmission further comprises a differential bearing arranged in the transmission cavity, the oil injection channel 21 further comprises a third oil injection hole 212 penetrating through the oil guide cover plate 20, the third oil injection hole 212 is arranged at one side of the first oil injection hole 211 and is arranged independently from the first oil injection hole 211, the shell 10 is provided with a fourth oil injection hole 12, the fourth oil injection hole 12 is arranged at a position corresponding to the differential bearing and penetrates through the shell 10, and the fourth oil injection hole 12 and the third oil injection hole 212 are aligned and communicated with each other. Specifically, the transmission further comprises the differential bearing, the differential bearing is arranged in the transmission cavity and connected with the shell 10. The oil injection channel 21 further comprises the third oil injection hole 212, and the fourth oil injection hole 12 corresponding to the differential bearing is arranged on the shell 10, the fourth oil injection hole 12 and the third oil injection hole 212 are aligned and communicated, that is, the oil guide cover plate 20 is mounted on the shell 10, the third oil injection hole 212 and the fourth oil injection hole 12 are directly aligned, so that the oil can be guided to the differential bearing to realize the lubrication and cooling of the differential bearing. Optionally, the third oil injection hole 212 is arranged outside the oil collecting ring 31, and independent oil supply to the differential bearing can be realized.

[0047] In an embodiment of the utility model, the transmission further includes a sealing ring arranged between the oil guide cover plate 20 and the shell 10 and located outside the third oil injection hole 212. The sealing ring can improve the sealing performance of the connection between the oil guide cover plate 20 and the shell 10, prevent oil leakage between the oil guide cover plate 20 and the shell 10, and prevent dust from entering the transmission cavity and affecting the performance of the transmission assembly.

[0048] In an embodiment of the utility model, with reference to Figures 5 to 7 , the transmission further includes a gear set 60 arranged in the transmission cavity and an oil injection pipeline 40 arranged corresponding to the gear set. The oil injection channel 21 further includes a fifth oil injection hole 213 penetrating the oil guide cover plate 20. The shell 10 is provided with a sixth oil injection hole 13. The sixth oil injection hole 13 penetrates the shell 10 and is aligned and communicated with the fifth oil injection hole 213. The oil injection pipeline 40 is connected to the shell 10 and communicates with the sixth oil injection hole 13. Specifically, the transmission further includes a gear set 60 arranged in the transmission cavity. It can be understood that gears are arranged on the input shaft and the intermediate shaft respectively. The gears are engaged to realize the transmission function. The gears collectively constitute a gear set. In order to realize the lubrication of the gear engagement position, the embodiment is provided with an oil injection pipeline 40. The oil injection pipeline 40 is located in the transmission cavity and can guide the oil in the fifth oil injection hole 213 to the engagement position of the corresponding gear. Alternatively, the fifth oil injection hole 213 is arranged outside the oil collecting ring 31 and is arranged at intervals with the third oil injection hole 212. In this embodiment, after the oil guide cover plate 20 is installed to the shell 10, the fifth oil injection hole 213 is directly aligned with the sixth oil injection hole 13. The oil flows from the fifth oil injection hole 213 into the sixth oil injection hole 13. In an embodiment, the oil injection pipeline 40 can be welded to the inner wall of the shell 10 or fixed to the inner wall of the shell 10 by buckling, bolts, etc. This is not limited.

[0049] In an embodiment of the utility model, with reference to Figures 5 to 7The gear set 60 includes at least one of a primary gear, a secondary gear, and a half-shaft gear. The fuel injection pipe 40 includes at least one of a first fuel injection sub-pipe 41, a second fuel injection sub-pipe 42, and a third fuel injection sub-pipe 43. All three sub-pipes are connected to the sixth fuel injection hole 13. The fuel injection direction of the first fuel injection sub-pipe 41 is towards the primary gear, the fuel injection direction of the second fuel injection sub-pipe 42 is towards the secondary gear, and the fuel injection direction of the third fuel injection sub-pipe 43 is towards the half-shaft gear. Specifically, the gear set includes at least one of a primary gear, a secondary gear, and a half-shaft gear, which can include any one, any combination of two, or any combination of three. Typically, the gear set includes a primary gear, a secondary gear, and a half-shaft gear. The specific structure can refer to existing parallel shaft or off-axis transmission structures, and will not be described in detail here. To achieve lubrication at the meshing positions of different types of gears, the oil injection pipe 40 in this embodiment includes at least one of a first oil injection sub-pipe 41, a second oil injection sub-pipe 42, and a third oil injection sub-pipe 43, all of which are connected to the sixth oil injection hole 13. That is, referring to... Figure 6 The first oil injection sub-pipe 41 corresponds to the meshing area 61 of the first-stage gear, the second oil injection sub-pipe 42 corresponds to the meshing area 62 of the second-stage gear, and the third oil injection sub-pipe 43 corresponds to the half-shaft gear. Different oil injection sub-pipes can deliver oil to the corresponding gear meshing positions or gears, ensuring lubrication. Optionally, refer to... Figure 7 The housing 10 is provided with a differential window 14, the half-shaft gear is exposed in the differential window 14, and the third fuel injection sub-pipe 43 sprays oil toward the differential window 14.

[0050] In one embodiment of this utility model, reference is made to Figure 5The oil injection pipeline 40 further comprises a main oil injection pipe 44, the main oil injection pipe 44 is communicated with the sixth oil injection hole 13, and the first oil injection sub-pipe 41, the second oil injection sub-pipe 42 and the third oil injection sub-pipe 43 are connected to the main oil injection pipe 44. Specifically, the main oil injection pipe 44 is arranged in the gear chamber, the first oil injection sub-pipe 41, the second oil injection sub-pipe 42 and the third oil injection sub-pipe 43 are communicated with the main oil injection pipe 44, the main oil injection pipe 44 is communicated with the sixth oil injection hole 13, oil in the sixth oil injection hole 13 first enters the main oil injection pipe 44, is distributed through the main oil injection pipe 44 and then enters the first oil injection sub-pipe 41, the second oil injection sub-pipe 42 and the third oil injection sub-pipe 43, so that oil injection at different positions is realized. Optionally, the main oil injection pipe 44, the first oil injection sub-pipe 41, the second oil injection sub-pipe 42 and the third oil injection sub-pipe 43 are integrally formed, so that oil leakage is prevented and sufficient lubricating oil is ensured. For gear positions of different types of gear assemblies, the positions of the first oil injection sub-pipe 41, the second oil injection sub-pipe 42 and the third oil injection sub-pipe 43 in the main oil injection pipe 44 are adjusted, so that the lubrication requirement is met. Optionally, the main oil injection pipe 44 is fixed to the inner wall of the shell 10, and the first oil injection sub-pipe 41, the second oil injection sub-pipe 42 and the third oil injection sub-pipe 43 are fixed to the main oil injection pipe 44.

[0051] To achieve the above object, the utility model embodiment proposes a kind of electric drive system, the electric drive system includes above described transmission. Specifically, the specific structure of transmission refers to the above embodiment, since the electric drive system has adopted all technical solutions of the above embodiment, at least has all beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0052] To achieve the above object, the utility model embodiment proposes a kind of vehicle, the vehicle includes above described electric drive system. Specifically, the specific structure of electric drive system refers to the above embodiment, since the vehicle has adopted all technical solutions of the above embodiment, at least has all beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0053] The above is only exemplary embodiment of the utility model, and not therefore limit the patent range of the utility model embodiment, any equivalent structural transformation made by using the utility model embodiment specification and drawing contents, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model embodiment.

Claims

1. A transmission characterized by, The transmission comprises: a housing provided with a transmission cavity and an opening communicating with the transmission cavity; and an oil guide cover plate arranged at the opening, a surface of the oil guide cover plate facing the transmission cavity being provided with an oil injection channel, and a surface of the oil guide cover plate facing away from the transmission cavity being provided with an oil supply pipeline, the oil injection direction of the oil injection channel being towards the transmission cavity and communicating with the oil supply pipeline.

2. The transmission of claim 1, wherein, The transmission further comprises an input shaft and an input bearing connected with the input shaft, both of which are arranged in the transmission cavity; the oil injection channel comprises a first oil injection hole penetrating through the oil guide cover plate and communicating with the oil supply pipeline, and the first oil injection hole is arranged at a position corresponding to the input bearing.

3. The transmission of claim 2, wherein, The transmission further comprises an intermediate shaft arranged in the transmission cavity and an intermediate bearing connected with the intermediate shaft, and a surface of the oil guide cover plate facing the transmission cavity is provided with an oil collection structure, the oil collection structure being arranged around the first oil injection hole and communicating with the first oil injection hole, and the housing is provided with a second oil injection hole penetrating through the housing and communicating with the oil collection structure, and the second oil injection hole is arranged at a position corresponding to the intermediate bearing.

4. The transmission of claim 3, wherein, The oil collection structure comprises an oil collection ring protruding from the oil guide cover plate, an inner side of the oil collection ring forming a recessed space, the first oil injection hole being located at the inner side of the oil collection ring, and a portion of the oil collection ring protruding away from the recessed space to form an oil collection recess, the oil collection recess being located at the bottom of the oil guide cover plate and communicating with the second oil injection hole.

5. The transmission of claim 2, wherein, The transmission further comprises a differential bearing arranged in the transmission cavity, and the oil injection channel further comprises a third oil injection hole penetrating through the oil guide cover plate, the third oil injection hole being arranged at one side of the first oil injection hole and being arranged independently of the first oil injection hole; the housing is provided with a fourth oil injection hole, the fourth oil injection hole being arranged at a position corresponding to the differential bearing and penetrating through the housing, and the fourth oil injection hole and the third oil injection hole are aligned and communicate with each other.

6. The transmission of claim 5, wherein, The transmission further comprises a sealing ring arranged between the oil guide cover plate and the housing and located at the outer side of the third oil injection hole.

7. The transmission of claim 1, wherein, The transmission further comprises a gear set arranged in the transmission cavity and an oil injection pipeline arranged corresponding to the gear set, the oil injection channel further comprises a fifth oil injection hole penetrating through the oil guide cover plate, and the housing is provided with a sixth oil injection hole penetrating through the housing and aligned and communicating with the fifth oil injection hole, and the oil injection pipeline is connected with the housing and communicates with the sixth oil injection hole.

8. The transmission of claim 7, wherein, The gear set comprises at least one of a primary gear, a secondary gear and a half shaft gear, the oil injection pipeline comprises at least one of a first oil injection sub-pipeline, a second oil injection sub-pipeline and a third oil injection sub-pipeline, and the first oil injection sub-pipeline, the second oil injection sub-pipeline and the third oil injection sub-pipeline all communicate with the sixth oil injection hole; wherein the oil injection direction of the first oil injection sub-pipeline is towards the primary gear, the oil injection direction of the second oil injection sub-pipeline is towards the secondary gear, and the oil injection direction of the third oil injection sub-pipeline is towards the half shaft gear.

9. The transmission of claim 8, wherein, The fuel injection pipeline further comprises a main fuel injection pipeline, the main fuel injection pipeline is communicated with the sixth fuel injection hole, and the first fuel injection sub-pipeline, the second fuel injection sub-pipeline and the third fuel injection sub-pipeline are connected to the main fuel injection pipeline.

10. An electric drive system, characterized by The electric drive system comprises a transmission as claimed in any of claims 1 to 9.

11. A vehicle characterized by comprising: The vehicle comprises an electric drive system as claimed in claim 10.

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