Transmission, automotive powertrain and automobile

Abstract

A gearbox (200) comprises a housing (510) having an inner cavity (240), a gear set (210) and an oil feeder (100) housed in the housing (510), an oil reservoir (243) for carrying lubricating oil being provided at the bottom of the inner cavity (240), the oil feeder (100) comprising a sealed chamber (110) and an oil collecting tank (120) which are fixedly connected, the sealed chamber (110) being provided with an oil inlet (111) and an oil injection pipe (112), the oil reservoir The lubricating oil in (243) is fed in from the oil inlet (111) and sprayed toward the lubricated part of the gear set (210) through the oil injection pipe (112). The oil collecting tank (120) has an upper opening (123) for receiving the lubricating oil stirred in when the gear set (210) rotates. The oil collecting tank (120) is also provided with an oil delivery tank (124) corresponding to the oil injection pipe (112) for lubricating the same lubricated part as the corresponding oil injection pipe (112). The oil supply device (100) realizes active lubrication through the sealed chamber (110) and realizes passive lubrication through the oil collecting tank (120). The two methods cooperate to ensure that the gearbox (200) works reliably, and the positions of the oil injection pipe (112) and the oil delivery tank (124) are adjustable, and the portability is strong. It also relates to an automobile powertrain (500) including the gearbox (200), and an automobile.

Description

Technical Field

[0001] The present application relates to the field of electric vehicles, and in particular to a gearbox, an automobile powertrain equipped with the gearbox, and an automobile. Background Art

[0002] The powertrain of an electric vehicle consists of a motor and a gearbox. As the power source, the motor rotates at high speeds, requiring a gearbox with a specific reduction ratio to transmit the motor's power to the wheels. During operation, the motor generates significant heat. Simultaneously, the bearings and gears within the gearbox rotate at high speeds and experience heavy loads, generating significant heat due to friction on the bearing and gear surfaces. To prevent transmission failure, engineering design incorporates cooling and lubrication features within the motor and gearbox to ensure components maintain an appropriate operating temperature range.

[0003] Driven by the current market, automotive powertrains are evolving towards miniaturization and higher power. The maximum speed and load of automotive powertrains are constantly increasing to achieve higher power density and total power. These increases in speed and load significantly increase heat generation in both the motor and transmission. Ensuring efficient cooling and lubrication of these motors and transmissions has become a bottleneck restricting assembly miniaturization. Summary of the Invention

[0004] The purpose of this application is to provide a gearbox with reliable lubrication to adapt to the working conditions of different gearbox speeds. The application also provides an automobile powertrain including the gearbox and an automobile, both of which are configured based on the characteristics of the gearbox to achieve better lubrication and cooling effects.

[0005] In a first aspect, the present application relates to a gearbox, comprising a housing having an inner cavity, and a gear set and an oil feeder housed in the housing; an oil reservoir for carrying lubricating oil is provided at the bottom of the inner cavity; the oil feeder is fixed to the side of the gear set away from the oil reservoir, and the oil feeder comprises a fixedly connected sealing chamber and an oil collecting tank, and the oil collecting tank is located above the sealing chamber; the sealing chamber is provided with an oil inlet and at least one oil injection pipe, and the at least one oil injection pipe extends in different directions; the sealing chamber is used to receive the lubricating oil in the oil reservoir fed from the oil inlet, and to spray the lubricating oil toward at least one part to be lubricated of the gear set through the at least one oil injection pipe; the oil collecting tank has an upper opening, and the oil collecting tank is used to receive the lubricating oil in the oil reservoir stirred by the gear set through the upper opening when the gear set rotates, and the oil collecting tank is also provided with at least one oil delivery tank, the number of the oil delivery tanks is the same as the number of the oil injection pipes, and any oil delivery tank is provided corresponding to one of the oil injection pipes, and is used to lubricate the same part to be lubricated with the corresponding oil injection pipe.

[0006] The gearbox of this application houses the gear set and the oil feeder within its housing. The gearbox also forms an oil reservoir within its housing, thereby achieving the gearbox's rotational deceleration function. Lubricating oil from the reservoir is fed into the oil feeder to lubricate the predetermined lubricated areas of the gear set. Because the oil feeder is fixed to the side of the gear set facing away from the reservoir, i.e., vertically above the gear set, the lubricating oil delivered by the oil feeder from the oil tank and / or oil injection pipe can flow by gravity to the lubricated areas of the gear set.

[0007] The oil supply allows lubricating oil to flow into the sealed chamber through the oil inlet and out through the oil spray pipe to the parts to be lubricated in the gear set. The sealed chamber can provide a certain pressure for the lubricating oil, ensuring that the oil spray pipe sprays the lubricating oil toward the parts to be lubricated at a certain speed, thus achieving active lubrication of the parts to be lubricated.

[0008] When the gear set rotates, the oil supplier collects the lubricating oil stirred in by the gears through the upper opening of the oil collecting tank located above the sealing chamber, and flows out from the oil delivery tank to the parts to be lubricated in the gear set, thereby realizing passive lubrication of the parts to be lubricated.

[0009] For the same part to be lubricated in the gear set, the extension paths of the oil spray pipe extending from the sealing chamber and the oil delivery tank extending from the oil collecting tank correspond to each other, so that both the oil spray pipe and the oil delivery tank can extend toward the part to be lubricated, and respectively realize active lubrication and passive lubrication of the part to be lubricated.

[0010] While simultaneously providing active and passive lubrication for each lubricated part of the gear set, the oil feeder of this application also coordinates the oil delivery trough and oil spray pipe, allowing the oil feeder to adjust the extension paths of the oil delivery trough and oil spray pipe relative to the oil sump and seal chamber to match the positions of the lubricated parts, achieving effective lubrication. The location and number of lubricated parts of the gear set can be adjusted as required by the actual engineering structure without affecting the lubrication effect of the oil feeder, thereby ensuring the normal operation of the gear set and improving the reliability of the gearbox.

[0011] In a possible embodiment, the gear set includes a first gear and a second gear that are meshed with each other, and the first gear and the second gear are respectively rotatably connected to the casing; the bottom of the first gear is located in the oil reservoir and immersed in the lubricating oil, and the first gear rotates from bottom to top away from the second gear side, and is spaced from the inner wall of the casing to form an oil stirring channel. When the first gear rotates, it can drive the lubricating oil in the oil reservoir into the oil collecting tank through the oil stirring channel.

[0012] In this embodiment, the first gear is immersed in the lubricating oil carried by the oil reservoir, and an oil stirring channel is formed between the inner wall and the first gear, so that the first gear can send the lubricating oil into the oil collecting tank of the oil supply device through the oil stirring channel when it rotates, thereby realizing the passive lubrication function of each part to be lubricated in the gear set.

[0013] In a possible embodiment, the oil supplier is arranged on the side of the first gear close to the second gear, and the inner wall of the box includes a first side wall and a top wall. The first side wall is located on the side of the first gear away from the second gear, and the top wall is located above the first side wall. The first side wall and the top wall together form an oil stirring channel with the first gear.

[0014] In this embodiment, the first gear rotates from bottom to top on the side facing away from the second gear, and from top to bottom on the side facing the second gear. When the oil feeder is positioned on the side of the first gear closest to the first gear, the lubricating oil stirred by the first gear must flow over the top of the first gear before entering the oil sump. The first sidewall and top wall, together with the first gear, form an oil stirring channel for the lubricating oil stirred by the first gear to pass through and enter the oil sump.

[0015] The top wall includes a first end surface close to the first side wall and a second end surface opposite to the first end surface. The second end surface is located below the first end surface in the vertical direction to guide the lubricating oil in the oil stirring channel to flow into the oil collecting tank.

[0016] In this embodiment, a portion of the top wall close to the first side wall needs to be spaced apart from the top of the first gear, while a portion of the top wall away from the first side wall can be located below the first end face in the vertical direction, thereby forming an inclined surface inclined from the first gear toward the oil collecting tank, which can guide more lubricating oil to fall into the oil collecting tank.

[0017] In a possible embodiment, the distance between the liquid level of the lubricating oil in the oil reservoir and the rotation center of the first gear is less than or equal to the root circle radius of the first gear.

[0018] In this embodiment, defining the liquid level of the lubricating oil in the oil reservoir can ensure the depth of the first gear immersed in the lubricating oil, thereby ensuring that the first gear can stir a sufficient amount of oil into the oil collecting tank.

[0019] In a possible embodiment, the gearbox also includes an oil delivery component, which includes an oil delivery pipeline and an oil delivery pump. One end of the oil delivery pipeline is connected to the oil inlet of the oil supplier, and the other end is connected to the oil storage tank. The oil delivery pump is used to pump the lubricating oil in the oil storage tank into the sealed chamber through the oil delivery pipeline.

[0020] In this embodiment, the lubricating oil in the oil reservoir is transported to the sealed chamber through the communication between the oil delivery component and the sealed chamber, thereby realizing the active lubrication function of each part to be lubricated in the gear set.

[0021] In a possible embodiment, the first gear and the second gear mesh with each other at a first meshing position, and at least one part to be lubricated includes the first meshing position.

[0022] In this embodiment, the first gear and the second gear mesh with each other at the first meshing position. Providing lubrication to the first meshing position can reduce friction between the surfaces of the first gear and the second gear, thereby extending the service life of the gear set.

[0023] In a possible embodiment, the gearbox further includes a third gear and a fourth gear, and the third gear and the fourth gear are engaged with each other at a second engagement position, and the at least one part to be lubricated further includes a second engagement position.

[0024] In this embodiment, the gear set may further include more gears, and the more gears are meshed with each other for transmission. In this case, the oil feeder may also lubricate the remaining meshing positions to slow down the friction loss of the gear set.

[0025] In a possible embodiment, the gear set also includes a first gear shaft, a second gear shaft, a first bearing and a second bearing. The first gear shaft is fixedly connected to the first gear, and the second gear shaft is fixedly connected to the second gear. The first bearing is used to realize the rotational connection between the first gear shaft and the housing, and the second bearing is used to realize the rotational connection between the second gear shaft and the housing. The parts to be lubricated also include the position of the first bearing and the position of the second bearing.

[0026] In this embodiment, the first gear shaft and the first bearing cooperate to achieve rotational connection of the first gear relative to the housing. Lubricating the first bearing reduces internal friction of the first bearing, extending its service life. The second gear shaft and the second bearing cooperate to achieve rotational connection of the second gear relative to the housing. Lubricating the second bearing also reduces internal friction of the second bearing, extending its service life.

[0027] In a possible embodiment, the gear set further includes a third gear shaft and a third bearing. The third gear shaft is fixedly connected to the third gear and is used to realize the rotational connection between the third gear shaft and the box. The part to be lubricated also includes the position of the third bearing.

[0028] In this embodiment, the gear set may further include a third bearing, and the oil supply device may also lubricate the third bearing to reduce internal friction of the third bearing and extend the service life of the third bearing.

[0029] In one possible embodiment, at least one fuel injection pipe includes a lateral fuel injection pipe, which extends horizontally and in a direction away from the sealed chamber; at least one oil delivery trough includes a lateral fuel delivery trough, and a notch connecting to the lateral fuel delivery trough is provided on the side panel. The extension direction of the lateral fuel delivery trough is the same as the extension direction of the corresponding lateral fuel injection pipe, and is located above the corresponding lateral fuel injection pipe.

[0030] In this embodiment, corresponding to the part of the gear set to be lubricated located on the side of the oil supplier, a lateral oil injection pipe connected to the sealing chamber and a lateral oil delivery tank connected to the oil collecting tank through the gap are provided, and the lateral oil delivery tank is located above the lateral oil injection pipe. The two can extend in parallel to the part of the gear set to be lubricated, respectively realizing active lubrication and passive lubrication effects on the part to be lubricated.

[0031] In a possible embodiment, the lateral oil delivery groove includes a groove bottom and two groove walls, the groove bottom is parallel to the lateral oil injection pipe, and the two groove walls are relatively arranged on both sides of the groove bottom. The groove bottom includes a first end close to the notch and a second end away from the notch. The second end is located below the first end in the vertical direction, or is flush with the first end.

[0032] In this embodiment, the bottom and walls of the lateral oil delivery groove guide the lubricating oil toward the lubricated area, achieving passive lubrication of the lubricated area. Furthermore, the second end is flush with or lower than the first end, ensuring that the lubricating oil flows smoothly to the lubricated area under the action of gravity.

[0033] In one possible embodiment, on a path where the lateral oil injection pipe extends parallel to the lateral oil delivery groove, the lateral oil injection pipe has an extension section that exceeds the extension length of the lateral oil delivery groove, and an open opening is provided at the top of the extension section. The lubricating oil transported by the lateral oil delivery groove also flows into the extension section through the opening and acts on the part to be lubricated along the extension section.

[0034] In this embodiment, the lateral oil injection pipe extends partially beyond the lateral oil delivery trough along its path. The lubricating oil in the lateral oil delivery trough is received through an opening at the top of this extended section. This lubricating oil is then applied to the lubricated area via the extended section. This embodiment utilizes the parallel arrangement of the lateral oil delivery trough and the lateral oil injection pipe to simplify the structure of the lateral oil delivery trough, allowing lubricating oil to be directed solely through the lateral oil injection pipe.

[0035] In a possible embodiment, the plurality of first ends are arranged flush along a horizontal direction.

[0036] In this embodiment, after the oil collecting tank is connected to the multi-way lateral oil delivery tank, the first end of the bottom of the multi-way lateral oil delivery tank is set to be flush in the horizontal direction, which can ensure that the lubricating oil in the oil collecting tank flows evenly into each lateral oil delivery tank, so as to ensure the lubrication effect of each lateral oil delivery tank on the part to be lubricated.

[0037] In a possible embodiment, at least one fuel injection pipe includes a vertical fuel injection pipe, which extends in a vertical direction away from the sealed chamber; at least one oil delivery trough includes a vertical fuel delivery trough, which is fixedly connected to the bottom plate of the oil collecting trough and is constructed as a through groove passing through the sealed chamber. The extension direction of the vertical fuel delivery trough is the same as the extension direction of the corresponding vertical fuel injection pipe, and is located on one side of the corresponding vertical fuel injection pipe.

[0038] In this embodiment, corresponding to the fact that some parts of the gear set to be lubricated may also be located below the oil feeder, a vertical oil spray pipe connected to the sealed chamber and a vertical oil delivery trough connected to the oil collection tank are provided. The vertical oil delivery trough is configured as a through slot extending through the sealed chamber, thereby achieving the effect of lubricating the parts to be lubricated below the oil feeder. In this case, the vertical oil delivery trough is located on one side of the vertical oil spray pipe, and both extend parallel to the parts to be lubricated below.

[0039] In a possible embodiment, the vertical oil injection pipe is constructed as an opening opened at the bottom of the sealed chamber.

[0040] In this embodiment, because the part to be lubricated is located below the oil supplier, a vertical oil spray pipe is configured as an opening at the bottom of the sealed chamber. The sealed chamber can deliver lubricating oil directly to the part to be lubricated at the opening by gravity.

[0041] In a possible embodiment, the number of at least one oil delivery trough is multiple, and at least one oil guide plate is provided on the bottom plate. The at least one oil guide plate divides the internal space of the oil collecting trough into at least two oil collecting areas. The number of at least two oil collecting areas is the same as the number of the multiple oil delivery troughs, and each oil delivery trough is connected to an oil collecting area.

[0042] In this embodiment, the internal space of the oil sump is divided into multiple oil collection areas using oil guide plates. Each oil delivery trough is connected to an oil collection area, ensuring that each trough receives the required lubricating oil and provides lubrication. By varying the size of the oil collection areas, different amounts of lubrication can be provided to different parts to meet their lubrication needs.

[0043] In one possible embodiment, the base plate includes a first side and a second side that are opposite to each other. When the gear set rotates, the gear set stirs the lubricating oil and sends it into the oil collecting tank from the upper opening close to the first side. Each oil guide plate is provided with a straight section, and the straight section of each oil guide plate is provided near the second side of the base plate. The multiple straight sections are parallel to each other and fixedly spaced.

[0044] In this embodiment, because the lubricating oil stirred by the gears mostly falls into the oil collecting tank from the upper opening away from the first side, by arranging straight sections on each oil guide plate, and the straight sections are fixed at intervals parallel to each other near the second side, the lubricating oil can be distributed to each oil collecting area when the lubricating oil enters the oil collecting tank, thereby meeting the lubrication needs of different parts to be lubricated.

[0045] In a possible embodiment, the side plate includes a first side plate close to the first gear, and a second side plate opposite to the first side plate, the first side plate has a first height from the bottom plate, the second side plate has a second height from the bottom plate, and the first height is lower than the second height.

[0046] In this embodiment, based on the characteristics of the oil supply in the gear group stirring oil method, the height of the first side plate relatively close to the first gear in the side plate is set to be lower than the height of the second side plate relatively far away from the first gear. This can ensure that the lubricating oil can smoothly pass over the first side plate and fall into the oil collecting tank under the obstruction of the second side plate, thereby achieving a better passive lubrication effect.

[0047] In a possible embodiment, the side panel also includes a third side panel protruding from the bottom panel, the third side panel is located between the first side panel and the second side panel, the first side panel has a first height from the bottom panel, the third side panel has a third height from the bottom panel, and the first height is lower than the third height.

[0048] In this embodiment, a third side plate specifically used for oil blocking is provided between the first side plate and the second side plate, and more lubricating oil stirred by the gear set can also be collected in the oil collecting tank, thereby achieving better passive lubrication effect.

[0049] In a possible embodiment, the bottom plate includes a first side close to the first gear, and a second side opposite to the first side, and the second side is located above the first side in a vertical direction, or flush with the first side.

[0050] In this embodiment, by tilting the bottom plate, the upper opening can also be tilted toward the direction of oil supply, so that more lubricating oil stirred by the gear set can be collected in the oil collecting tank, achieving a better passive lubrication effect.

[0051] In a possible embodiment, the sealing chamber and the oil collecting tank are configured as an integrated structure.

[0052] In this embodiment, the oil collecting tank and the sealing chamber are configured as an integrated structure. The bottom plate of the oil collecting tank can be used to form the top structure of the sealing chamber, and the side plate of the oil collecting tank can also be used to form the side structure of the sealing chamber, which is beneficial to reducing the overall volume of the oil feeder and adapting to the miniaturization of the gearbox.

[0053] In a second aspect, the present application also provides an automobile powertrain, comprising a motor and the gearbox provided in the first aspect of the present application, wherein the motor is fixedly connected to the gearbox, and the motor is used to drive the gear set in the gearbox to rotate.

[0054] Because the automobile powertrain of the present application adopts the gearbox provided in the second aspect of the present application, it has a better lubrication effect. When the automobile powertrain is running at a low speed, the gear set is protected by active lubrication, and when the automobile powertrain is running at a high speed, the gear set is protected by passive lubrication, thereby improving the reliability and service life of the automobile powertrain.

[0055] In a possible embodiment, the automobile powertrain is further provided with a cooling system, and the cooling system is used to transport lubricating oil in the oil reservoir to the motor to cool the motor.

[0056] In this embodiment, the automobile powertrain also transports the lubricating oil in the oil reservoir to the motor through the cooling system to cool the motor. There is no need to set up a lubricating oil bearing structure in the motor, which improves the integration of the automobile powertrain and is conducive to controlling the overall volume of the automobile powertrain.

[0057] In one possible embodiment, the cooling system includes an oil inlet pipe and an oil return pipe, both of which are connected between the oil storage tank and the motor. After the lubricating oil flows into the motor from the oil inlet pipe to complete cooling, it flows back to the oil storage tank through the oil return pipe.

[0058] In this embodiment, a cooling system loop is formed by the oil inlet pipe and the oil return pipe, so that the lubricating oil fed into the motor through the oil inlet pipe can be returned to the oil storage tank through the oil return pipe, thereby realizing the circulation and exchange of the lubricating oil used for cooling in the motor.

[0059] A possible embodiment further includes a heat exchanger, which is connected in series to the oil return pipe and is used to cool the lubricating oil.

[0060] In this embodiment, a heat exchanger connected in series to the oil return pipe is used to exchange heat and cool the lubricating oil, so that the high-temperature lubricating oil returning from the motor can be cooled by the heat exchanger and then returned to the oil storage tank for recycling, thereby avoiding causing the temperature of the gearbox to rise too quickly.

[0061] In a possible embodiment, the motor includes a stator and a rotor that cooperate with each other, and the cooling system delivers lubricating oil into the stator and the rotor respectively to cool the motor.

[0062] In this embodiment, the motor includes a stator and a rotor, and the lubricating oil enters the stator and the rotor respectively, which can reduce the overall temperature of the motor and achieve a better cooling effect.

[0063] In a third aspect, the present application provides an automobile, comprising wheels and the automobile powertrain provided in the second aspect of the present application, wherein the automobile powertrain is used to drive the wheels to rotate.

[0064] It is understandable that because the automobile powertrain provided in the second aspect of the present application has better lubrication and cooling effects, the stability of the automobile of the present application is higher and the transmission efficiency when the motor drives the wheels to rotate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 This is a schematic diagram of the appearance of an automobile powertrain provided in an embodiment of the present application;

[0066] Figure 2 yes Figure 1 A schematic cross-sectional view of a powertrain of an automobile is shown;

[0067] Figure 3 yes Figure 1 A schematic diagram of a lubricating oil circulation method in the cooling system of an automobile powertrain is shown;

[0068] Figure 4 yes Figure 1 The oil distribution diagram of the cooling system in the automobile powertrain is shown;

[0069] Figure 5 yes Figure 1 A schematic diagram of the internal structure of a gearbox in a vehicle powertrain is shown;

[0070] Figure 6 yes Figure 5 A schematic diagram of the structure of the gear set and oil feeder in the gearbox shown;

[0071] Figure 7 yes Figure 5 A schematic diagram of the structure of the gear set and the oil feeder in the gearbox shown in another viewing direction;

[0072] Figure 8 yes Figure 5 The schematic diagram of the structure of the passive lubrication oil circuit in the gearbox shown;

[0073] Figure 9 yes Figure 8 A schematic diagram of the partial structure of the passive lubrication oil circuit in the gearbox shown;

[0074] Figure 10 yes Figure 5 The schematic diagram of the structure of the oil feeder in the gearbox shown;

[0075] Figure 11 yes Figure 5 A schematic structural diagram of another embodiment of an oil feeder in a gearbox shown;

[0076] Figure 12yes Figure 5 A schematic structural diagram of another embodiment of an oil feeder in a gearbox shown;

[0077] Figure 13 yes Figure 5 A schematic structural diagram of another embodiment of an oil feeder in a gearbox shown;

[0078] Figure 14 yes Figure 10 A schematic cross-sectional view of a set of mutually parallel lateral oil injection pipes and lateral oil delivery grooves in the oil feeder of the gearbox shown;

[0079] Figure 15 yes Figure 10 A schematic cross-sectional view of another embodiment of a set of mutually parallel lateral oil injection pipes and lateral oil delivery grooves in the oil feeder of the transmission shown;

[0080] Figure 16 yes Figure 10 A schematic cross-sectional view of another embodiment of an oil feeder for a gearbox shown;

[0081] Figure 17 yes Figure 10 A schematic structural diagram of another embodiment of an oil feeder for a gearbox shown;

[0082] Figure 18 yes Figure 10 A schematic structural diagram of another embodiment of an oil feeder for a gearbox shown;

[0083] Figure 19 yes Figure 10 A schematic structural diagram of another embodiment of an oil feeder for a gearbox shown;

[0084] Figure 20 yes Figure 10 A schematic structural diagram of another embodiment of an oil supplier for a gearbox is shown. DETAILED DESCRIPTION

[0085] The following will describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0086] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" mentioned in this application includes direct and indirect connections unless otherwise specified. In the description of this application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0087] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above" or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below" or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0088] See also Figure 1 The automotive powertrain 500 provided in the embodiment of the present application shown includes a motor 300 and a gearbox 200. The motor 300 and the gearbox 200 are fixed relative to each other and are in transmission connection with each other. As the power source of the automotive powertrain, the motor 300 has a relatively high rotational speed and requires a gearbox 200 with a certain reduction ratio to transmit the power output of the motor 300 to the wheels of the vehicle, thereby driving the vehicle. It is understood that the vehicle equipped with the automotive powertrain 500 of the present application can be an electric vehicle or a hybrid vehicle.

[0089] The motor 300 and the gearbox 200 are each provided with a housing for protecting the motor 300 and its internal moving components, and protecting the gearbox 200 and its internal moving components. The housing of the motor 300 and the housing of the gearbox 200 can be provided independently of each other, and the housings can be connected and fixed after the motor 300 and the gearbox 200 are respectively assembled. In other embodiments, the housing of the motor 300 and the housing of the gearbox 200 can also be connected as shown in FIG. Figure 1 As shown in the integrated setting. Figure 1The illustrated automotive powertrain 500 includes a housing 510, which houses the internal components of the motor 300 and the transmission 200. Because the relative positions of the motor 300 and transmission 200 are fixed, integrating the housings of the motor 300 and transmission 200 improves the integration of the automotive powertrain 500. Furthermore, the integrated design of the housing 510 eliminates the need for connecting components between the motor 300 and transmission 200 housings, simplifying the structure of the automotive powertrain 500 and facilitating miniaturization of the automotive powertrain 500.

[0090] Please see Figure 2 The cross-sectional view of the automobile powertrain 500 of the present application is shown in FIG. In order to clearly illustrate the internal structure of the automobile powertrain 500, Figure 2 The cross-sectional structure is omitted. The motor 300 includes a stator 310 and a rotor 320. The stator 310 is fixedly connected to the housing 510, and the rotor 320 is rotatably connected to the housing 510. The stator 310 is sleeved outside the rotor 320 and is used to drive the rotor 320 to rotate. Figure 2 In the schematic diagram, the rotor 320 further includes an output section 321 extending from the stator 310. The output section 321 is drivingly connected to the gearbox 200 to transmit power to the gearbox 200, thereby realizing power output of the motor 300. In some embodiments, the output section 321 can also be configured as a rotating shaft structure fixedly connected to the rotor 320. The rotor 320 drives the rotating shaft to rotate, thereby realizing the function of the motor 300 outputting rotational power from the output section 321.

[0091] In the automobile powertrain 500 of the present application, the transmission connection between the motor 300 and the gearbox 200 can be realized by various means such as gear meshing transmission, chain transmission, belt transmission, etc. Figure 2 In the diagram, a gear segment 322 is further provided on the output segment 321 of the rotor 320, and a driven wheel 218 is provided on the gear segment 322 corresponding to the gear segment 322 of the gearbox 200. The gear segment 322 and the driven wheel 218 are engaged with each other to realize the transmission connection between the motor 300 and the gearbox 200.

[0092] One embodiment is Figure 2 As shown, the automotive powertrain 500 of the present application also includes a cooling system 600. The cooling system 600 is used to cool and lubricate the motor 300 and the transmission 200, respectively. Specifically, the cooling system 600 can be connected to the interior of the motor 300 and deliver lubricating oil to the motor 300 for cooling, thereby achieving a cooling effect on the motor 300.

[0093] The cooling system 600 includes an oil inlet pipe 610 and an oil return pipe 620, each of which is connected to the motor 300. The side of the oil inlet pipe 610 away from the motor 300 (which can also be understood as the inlet end of the oil inlet pipe 610) is connected to the part where the lubricating oil is stored, and the side of the oil return pipe 620 away from the motor 300 (which can also be understood as the outlet end of the oil return pipe 620) is also connected to the part where the lubricating oil is stored. The part where the lubricating oil is stored can be set inside the automobile powertrain 500, or it can be set as an external oil storage tank. The lubricating oil needs to have a cooling effect. After the lubricating oil flows into the motor 300 through the oil inlet pipe 610, it realizes heat exchange with the motor 300 and flows back to the part where the lubricating oil is stored through the oil return pipe 620, realizing the circulation of the lubricating oil and cooling the motor 300.

[0094] The oil inlet pipe 610 and the oil return pipe 620 can be independent pipes or can be connected as shown in FIG. Figure 2 At least part of the structure shown is a through hole opened inside the housing 510. At this time, the oil inlet pipe 610, the motor 300 and the oil return pipe 620 form a circulation loop for the lubricating oil. During the operation of the motor 300, the stator 310 drives the rotor 320 and generates a lot of heat. Figure 2 In the illustrated embodiment, the lubricating oil delivered by the oil inlet pipe 610 also flows through the stator 310 and the rotor 320, respectively cooling the stator 310 and the rotor 320. The stator 310 and the rotor 320 are also connected to the oil return pipe 620, into which the lubricating oil after heat exchange is delivered.

[0095] Please see back for an example Figure 1 The cooling system 600 also includes a heat exchanger 630, which is connected in series to the return oil pipe 620. After the lubricating oil has completed heat exchange and is cooled by the heat exchanger 630, it is returned to the lubricating oil storage area through the return oil pipe 620 to ensure that the lubricating oil stored in the lubricating oil storage area is in a low temperature state and can re-enter the motor 300 through the oil inlet pipe 610 for heat exchange.

[0096] exist Figure 2 In the diagram, the return oil pipe 620 is provided with a first interface 621 and a second interface 622 for connecting to the heat exchanger 630. The lubricating oil in the return oil pipe 620 enters the heat exchanger 630 through the first interface 621 to achieve heat exchange, and receives the lubricating oil after heat exchange in the heat exchanger 630 through the second interface 622. It should be pointed out that Figure 2 Only one lubricating oil circulation method of the cooling system 600 is shown. In other embodiments, the circulation path of the lubricating oil in the cooling system 600 can also be as follows Figure 3As shown, all the through holes at the cross-sectional position are set as oil inlet pipes 610, and an oil return pipe (not shown in the figure) is set at another cross-sectional position to realize the circulation flow of the lubricating oil; or in some embodiments, the cooling system 600 is all set as an oil return pipe (not shown in the figure) at the cross-sectional position, and an oil inlet pipe (not shown in the figure) is set at another cross-sectional position, which can also realize the circulation flow effect of the lubricating oil.

[0097] In some embodiments, when the location for storing lubricating oil is provided inside the housing 510 of the automobile powertrain 500, the bottom of the housing 510 can also be provided as an oil pool for storing lubricating oil. At this time, the cooling system 600 can only be provided with an oil inlet pipe 610. The lubricating oil sent into the stator 310 or the rotor 320 can flow downward by gravity after flowing out of the motor 300 and flow into the oil pool. That is, the present embodiment can omit the provision of the return oil pipe 620, or the inner wall of the housing 510 can be regarded as the return oil pipe 620 as a whole, so as to guide the lubricating oil to flow back into the oil pool. It can be understood that in this embodiment, the heat exchanger 630 should be provided on the oil inlet pipe 610 to cool the lubricating oil in the cooling system 600 (such as Figure 3 Because the lubricating oil in the cooling system 600 is recycled, the heat exchanger 630 is disposed at any position in the cooling system 600 to achieve the function of cooling the lubricating oil as a whole, without affecting the function of the cooling system 600 of the present application.

[0098] It should be pointed out that in Figure 3 In the illustrated cooling system 600, the oil inlet pipe 610, which supplies oil to the rotor 320, and the oil inlet pipe 610, which supplies oil to the stator 310, both exit from a first port 621 connected to a heat exchanger 630 and flow toward the rotor 320 and stator 310, respectively. In this embodiment, the oil return pipe 620 can be connected to a second port 622, thereby enabling the heat exchanger 630 to cool the lubricating oil. Alternatively, the oil inlet pipe 610 can be connected to the second port 622, thereby enabling the lubricating oil to be cooled during the process of being transported by the oil inlet pipe 610.

[0099] On the other hand, Figure 3 In the diagram, the cooling system 600 supplies oil to the rotor 320 from the left side to the right side of the diagram, while the cooling system 600 supplies oil to the stator 310 from the right side to the left side of the diagram. That is, the cooling system 600 supplies oil to the stator 310 and the rotor 320 in opposite directions. In some embodiments, when the lubricating oil storage area is located on one side of the motor 300, the cooling system 600 can also be configured to supply lubricating oil to the rotor 320 and the stator 310 in the same direction, respectively, to shorten the length of the oil inlet pipe 610 and facilitate controlling the overall volume of the automotive powertrain 500 of the present application.

[0100] See Figure 4 The oil circuit diagram of the cooling system 600 in the automotive powertrain 500 of the present application is shown in FIG. Figure 4 In the schematic diagram, the cooling system 600 acts on the motor 300 and the gearbox 200 respectively. Among them, the gearbox 200 includes a box body, the box body is formed with an inner cavity 240, and the bottom structure of the inner cavity 240 is an oil reservoir 243. The oil reservoir 243 is used to carry lubricating oil, that is, the oil reservoir 243 in this embodiment serves as a location for storing lubricating oil. The oil inlet pipe 610 and the oil return pipe 620 of the cooling system 600 are respectively connected to the oil reservoir 243. Among them, the oil inlet pipe 610 includes a first oil inlet pipe 611 and a second oil inlet pipe 612. The first oil inlet pipe 611 and the second oil inlet pipe 612 can be connected to the oil reservoir 243 respectively, or as shown in FIG. Figure 4 As shown, the first oil inlet pipe 611 and the second oil inlet pipe 612 are first connected to the oil reservoir 243 and then connected to the oil reservoir 243; the oil return pipe 620 includes a first oil return pipe 621 and a second oil return pipe 622, and the first oil return pipe 621 and the second oil return pipe 622 can also be connected to the oil reservoir 243 respectively, or as shown in FIG. Figure 4 As shown, the oil flow is first connected to the outside of the oil reservoir 243 and then to the oil reservoir 243 .

[0101] The end of the first oil inlet pipe 611 facing away from the oil reservoir 243 is connected to the stator 310 and is used to transport the lubricating oil in the oil reservoir 243 to the stator 310 for cooling. The end of the first oil return pipe 621 facing away from the oil reservoir 243 is also connected to the stator 310 and is used to return the cooled lubricating oil in the stator 310 to the oil reservoir 243. The end of the second oil inlet pipe 612 facing away from the oil reservoir 243 is connected to the rotor 320 and is used to transport the lubricating oil in the oil reservoir 243 to the rotor 320 for cooling. The end of the second oil return pipe 622 facing away from the oil reservoir 243 is also connected to the rotor 320 and is used to return the cooled lubricating oil in the rotor 320 to the oil reservoir 243.

[0102] It is understandable that the first oil inlet pipe 611 and the second oil inlet pipe 612 can also be connected to the heat exchanger 630 respectively, and then the lubricating oil flowing back from the stator 310 and the rotor 320 can be sent to the heat exchanger 630 for heat exchange. Figure 4 As shown, the first oil inlet pipe 611 and the second oil inlet pipe 612 are first merged and then connected to the heat exchanger 630, and the lubricating oil delivered to the motor 300 is first sent to the heat exchanger 630 for cooling.

[0103] Figure 4In the illustrated embodiment, an oil pump 640 is further provided on the oil inlet pipe 610. The oil pump 640 is used to provide power to drive the lubricating oil to circulate between the motor 300 and the oil reservoir 243. It is understood that the oil pump 640 can also be provided on the oil return pipe 620, or the oil pump 640 can be provided within the heat exchanger 630, both of which can achieve the effect of driving the lubricating oil to circulate and continuously provide cooling for the motor 300.

[0104] on the other hand, Figure 4 The lubricating oil circuit of the cooling system 600 to the gearbox 200 is also shown. Figure 5 Schematic diagram: The gearbox 200 also includes a gear set 210, an oil feeder 100 and an oil delivery assembly 230 (see FIG. Figure 4 ). Each gear in the gear set 210 is rotatably connected to the housing, and the oil feeder 100 is arranged on the upper side of the gear set 210 and is fixedly connected to the housing (shell 510). That is, the oil feeder 100 is located on the side of the gear set 210 away from the oil reservoir 243. The oil feeder 100 includes a sealed chamber 110 and an oil collecting tank 120, wherein the sealed chamber 110 is located below the oil collecting tank 120. The oil delivery component 230 includes an oil delivery pipeline 231 and an oil delivery pump 232. One end of the oil delivery pipeline 231 is connected to the oil reservoir 243, and the other end is connected to the oil feeder 100. For details, please refer to Figure 4 The oil delivery pipeline 231 is connected to the sealed chamber 110 of the oil supply unit 100. An oil delivery pump 232 is connected in series to the oil delivery pipeline 231 and is used to deliver lubricating oil to the sealed chamber 110 of the oil supply unit 100 via the oil delivery pipeline 231. After receiving the lubricating oil from the oil delivery assembly 230, the oil supply unit 100 can direct the lubricating oil through the pipeline connected to the sealed chamber 110 to the gear set 210 below, thereby lubricating and cooling the gear set 210.

[0105] It is understood that the oil delivery assembly 230 and oil supply 100 in the gearbox 200 can be considered part of the cooling system 600. The rotation of the gear set 210 generates friction and heat. The oil delivery assembly 230 and oil supply 100 work together to deliver lubricating oil to the gear set 210, thereby reducing internal friction within the gear set 210. The lubricating oil delivered to the gear set 210 can then flow back down into the oil reservoir 243, dissipating some of the heat generated by the gear set 210 and achieving a certain cooling effect.

[0106] It can be understood that in the gearbox 200 provided in the embodiment of the present application, the housing of the gearbox 200 is Figure 1 and Figure 2The housing 510 is shown. In other embodiments, the housing of the gearbox 200 can also be provided separately. Since the oil delivery assembly 230 is part of the cooling system 600, the oil pump 232 in the oil delivery assembly 230 can also be used as the oil pump 640 in the cooling system 600. That is, the oil delivery pipeline 231 and the oil inlet pipe 610 meet outside the oil reservoir 243, and the oil delivery pump 232 is provided between the junction and the oil reservoir 243. While driving the lubricating oil to flow through the oil delivery pipeline 231 to the oil supply device 100, the oil delivery pump 232 also simultaneously drives the lubricating oil through the oil inlet pipe 610 into the motor 300 to cool the motor 300. It is understood that in this embodiment, a three-way valve can be provided at the junction of the oil delivery pipeline 231 and the oil inlet pipe 610 to divert the lubricating oil driven by the oil delivery pump 232.

[0107] See Figure 6 and Figure 7 The diagram shows the internal structure of the transmission 200. The gear set 210 includes a driven gear 218, a first gear 211, and a second gear 212. The driven gear 218, the first gear 211, and the second gear 212 are each rotatably connected to the transmission 200 housing, with the first gear 211 and the second gear 212 meshing with each other. The driven gear 218 is also fixedly connected to the second gear 212. Specifically, the gear set 210 also includes a second gear shaft 214. The second gear shaft 214 passes through the rotational center of the driven gear 218 and the second gear 212 and is fixedly connected to the driven gear 218 and the second gear 212, thereby achieving a fixed connection between the driven gear 218 and the second gear 212. When the driven gear 218 is driven by the rotor 320 to rotate, the second gear 212, which is fixedly connected to the driven gear 218, also rotates synchronously with the driven gear 218. The second gear 212 further transmits the rotational motion to the first gear 211 through its meshing with the first gear 211.

[0108] Thus, the automobile powertrain 500 of the present application drives the rotor 320 to rotate through the stator 310 of the motor 300, and then the gear segment 322 on the rotor 320 engages with the driven wheel 218, and the second gear 212 engages with the first gear 211, thereby achieving the effect of transmitting the rotational power output by the motor 300 to the first gear 211. Figure 6 and Figure 7 As can be seen from the diagram, the number of teeth of the gear segment 322 is less than the number of teeth of the driven wheel 218, and the number of teeth of the second gear 212 is also less than the number of teeth of the first gear 211. Therefore, the rotation speed of the rotor 320 reaches the first gear 221 after two-stage deceleration. When the first gear 221 outputs the rotation to the wheel end, the deceleration effect of the gearbox 200 can be achieved.

[0109] In some embodiments, the second gear 212 can also be integrated with the driven wheel 218, meaning that the second gear 212 can also function as a driven gear. While meshing with the first gear 211, the second wheel 212 also directly meshes with the gear segment 322 of the rotor 320. Because the number of teeth on the gear segment 322 is smaller than that on the first gear 211, this embodiment can also achieve the deceleration effect of the transmission 200. Furthermore, using the second gear 212 as a driven gear can further reduce the size of the transmission 200, thereby reducing the overall volume of the vehicle powertrain 500.

[0110] In other embodiments, the gear set 210 may further include a third gear (not shown) and a fourth gear (not shown). The third gear is fixedly connected to the first gear 211, and the third gear and the fourth gear mesh with each other, and transmit the rotation of the first gear 211 to the fourth gear, thereby achieving the next stage of deceleration in the gear set 210. In other words, the first gear 211 can serve as the output gear of the gear set 210 in the transmission 200, for outputting the rotational power transmitted by the transmission 200; the first gear 211 can also serve as a transition gear of the gear set 210 in the transmission 200, achieving the first stage of deceleration in the gear set 210 by meshing with the second gear 212.

[0111] At one end of the second gear 212, in some embodiments, the second gear 212 can also be connected to the driven gear 218 via a pair of intermediate gears. That is, the gear set 210 in the transmission 200 of the present application is not limited to the number of gears or the number of transmission stages in the gear set 210. The lubrication and cooling effects of the gear set 210 can be achieved through the cooperation of the oil supply 100 and the oil delivery assembly 230.

[0112] Please continue to see Figure 6 and Figure 7The internal structure of the transmission 200 is shown. The gear set 210 also includes a first gear shaft 213, a first bearing 215, and a second bearing 216. The first gear shaft 213 passes through the rotation center of the first gear 211 and is fixedly connected to the first gear 211. There are two first bearings 215, fixed on either side of the first gear 211 along the length of the first gear shaft 213. That is, the first gear 211 is located between the two first bearings 215 along the length of the first gear shaft 213. The first bearing 215 includes a first bearing stator 2151 and a first bearing rotor 2152, which can rotate within the first bearing stator 2151. Each first bearing stator 2151 is fixedly connected to the transmission case 200, while each first bearing rotor 2152 is fixedly connected to the first gear shaft 213. As a result, the first gear shaft 213 can achieve a rotational connection with the case through the rotation of the two first bearing rotors 2152 relative to the first bearing stator 2151. The first gear 211 is fixedly connected to the first gear shaft 213 , that is, the first gear 211 is rotationally connected to the gearbox 200 through the cooperation between the first gear shaft 213 and the first bearing 215 .

[0113] exist Figure 6 In the diagram, the first gear shaft 213 is constructed as a U-shaped bracket structure, which includes a support portion 2131 fixedly connected to the first bearing 215, and connecting portions 2132 on both sides of the support portion 2131. The two connecting portions 2132 are respectively fixedly connected to the first gear 211, thus achieving the effect of fixed connection between the first gear shaft 213 and the first gear 211.

[0114] There are also two second bearings 216. These two second bearings 216 are fixed to either side of the second gear 212 along the length of the second gear shaft 214, and are also fixed to either side of the driven pulley 218. That is, along the length of the second gear shaft 214, the second gear 212 and the driven pulley 218 are both located between the two second bearings 216. The second bearing 216 includes a second bearing stator 2161 and a second bearing rotor 2162, which can rotate within the second bearing stator 2161. Each second bearing stator 2161 is fixedly connected to the housing of the transmission 200, and each second bearing rotor 2162 is fixedly connected to the second gear shaft 214. As a result, the second gear shaft 214 can achieve a rotational connection with the housing through the rotation of the two second bearing rotors 2162 relative to the second bearing stator 2161. The second gear 212 is fixedly connected to the second gear shaft 214 , that is, the second gear 212 is rotationally connected to the gearbox 200 through the cooperation between the second gear shaft 214 and the second bearing 216 .

[0115] The meshing transmission of the first gear 211 and the second gear 212 causes friction between the first gear 211 and the second gear 212. Furthermore, the higher the speed output by the motor 300, the greater the friction between the first gear 211 and the second gear 212, and the greater the heat generated. Furthermore, within the first bearing 215 and the second bearing 216, during the high-speed rotation of the first gear 211 and the second gear 212, the friction between the first bearing stator 2151 and the first bearing rotor 2152, as well as the friction between the second bearing stator 2161 and the second bearing rotor 2162, also increases simultaneously, causing the heat generated by the first bearing 215 and the second bearing 216 to increase.

[0116] The lubricating oil delivered by the oil supply 100 to the gear set 210 can be targeted to the aforementioned areas experiencing friction and experiencing higher temperature rises. This lubricating oil then forms a stable oil film at the meshing point (defined as the first meshing position) between the first gear 211 and the second gear 212, inside the first bearing 215, and inside the second bearing 216, mitigating wear caused by metal friction and thereby improving the transmission efficiency of the gear set 210, thereby increasing the reliability and service life of the transmission 200. In this embodiment, the aforementioned areas experiencing friction and experiencing higher temperature rises, such as the first meshing position, the first bearing 215, and the second bearing 216, are defined as areas of the gear set 210 to be lubricated. The oil supply 100 provides lubricating oil to the gear set 210, meaning that the oil supply 100 provides lubricating oil to the areas of the gear 210 to be lubricated.

[0117] It is understood that when the gear set 210 also includes a third gear and a fourth gear, the third gear and the fourth gear mesh at the second meshing position, and the oil supply 100 can also deliver lubricating oil to the corresponding second meshing position; or, when the gear set 210 also includes a third bearing (not shown) and a fourth bearing (not shown), the oil supply 100 can also deliver lubricating oil to the corresponding third bearing and the fourth bearing. In other words, the remaining parts of the gear set 210 where friction exists can also be defined as parts to be lubricated, and the parts to be lubricated of the gear set 210 can include the above-mentioned parts where friction heats up, but are not limited to the above-mentioned parts. In other embodiments, the parts to be lubricated can be arbitrarily set in the gear set 210 according to actual needs, and the oil supply 100 provides lubrication and cooling for the set parts to be lubricated.

[0118] It should be noted that the oil supply device 100 can lubricate the interior of the first bearing 215 and the interior of the second bearing 216 by supplying lubricating oil from the side of the junction between the first bearing stator 2151 and the first bearing rotor 2152, and from the side of the junction between the second bearing stator 2161 and the second bearing rotor 2162, respectively, to achieve lubrication of the interiors of the first bearing 215 and the second bearing 216. In other embodiments, the oil supply device 100 can also supply lubricating oil to the top of the first bearing 215 and the top of the second bearing 216, respectively, and through the openings (not shown) in the top of the first bearing stator 2151 and the top of the second bearing stator 2152, respectively, to allow the lubricating oil to penetrate into the first bearing rotor 2152 and the second bearing rotor 2162, thereby achieving lubrication of the interiors of the first bearing 215 and the second bearing 216, respectively.

[0119] The oil supply device 100 of the present application can realize the active lubrication function of the gear set 210 through the connection between the sealed chamber 110 and the oil delivery assembly 230. The oil collection tank 120 in the oil supply device 100 can realize the passive lubrication function of the gear set 210. Figure 8 On the side of the first gear 211 facing away from the second gear 212, the first gear 211 is also spaced apart from the inner cavity 240 of the housing to form an oil stirring channel 250. Specifically, the inner cavity 240 of the housing includes a first side wall 241 and a top wall 242. The first side wall 241 is located on the side of the first gear 211 facing away from the second gear 212, and the first side wall 241 and the first gear 211 are spaced apart from each other. The top wall 242 is located above the first side wall 241 and is connected to the first side wall 241. The top wall 242 is also spaced apart from the first gear 211. The connected first side wall 241 and top wall 242 are together spaced apart from the first gear 211 to form the oil stirring channel 250.

[0120] Furthermore, the bottom of the first gear 211 is also located in the oil reservoir 243, and the level of the lubricating oil in the oil reservoir 243 is higher than the bottom of the first gear 211, so that the bottom of the first gear 211 is immersed in the lubricating oil. The first gear 211 rotates away from the second gear 212 and rotates along the bottom of the first gear 211 to the top of the first gear 211. Therefore, during operation, the first gear 211 can continuously bring the lubricating oil in the oil reservoir 243 into the oil stirring channel 250. When the rotation speed of the first gear 211 reaches or exceeds a certain threshold (for example, 1000 rpm), the first gear 211 can stir the lubricating oil to move in the oil stirring channel 250.

[0121] The oil supply 100 is located on the side of the gear set 210 facing away from the oil reservoir 243. Its oil collection trough 120 is positioned at the end of the oil churning channel 250. Specifically, the oil supply 100 is positioned in correspondence with the oil churning channel 250, allowing the oil collection trough 120 to directly face and collect lubricating oil. When the speed of the first gear 211 exceeds a certain threshold, the lubricating oil stirred by the oil churning channel 250 falls into the oil collection trough 120. This oil is then directed through a pipeline connected to the oil collection trough 120 to flow to the gear set 210 below, providing passive lubrication for the gear set 210.

[0122] exist Figure 8 In the embodiment, the oil stirring channel 250 extends past the top of the first gear 211 and toward the side of the second gear 212. At this time, the oil supply device 100 is also located on the side of the first gear 211 near the second gear 212, and the height of the oil supply device 100 is lower than the height of the top of the first gear 211. The rotation direction of the first gear 211 on the side facing away from the second gear 212 is from the bottom to the top of the first gear 211, while the rotation direction of the first gear 211 on the side facing away from the second gear 212 is from the top to the bottom. It can be understood that on the side of the first gear 211 facing away from the second gear 212, the direction of movement of the lubricating oil in the oil stirring channel 250 moves from the oil reservoir 243 toward the top wall 242; as the first gear 211 rotates downward on the side facing the second gear 212, the direction of movement of the lubricating oil in the oil stirring channel 250 moves from the top wall 242 toward the oil reservoir 243. At this time, the height of the oil supplier 100 is lower than the height of the top of the first gear 211 , which can ensure that the oil collecting tank 120 receives the lubricating oil fed through the oil stirring channel 250 .

[0123] exist Figure 8 In the embodiment, the top wall 242 further includes a first end surface 2421 proximate to the first side wall 241, and a second end surface 2422 opposite the first end surface 2421. It is understood that, along the path of the oil stirring channel 250, the lubricating oil flows from the first end surface 2421 toward the second end surface 2422. In other words, the second end surface 2422 is closer to the end of the oil stirring channel 250 than the first end surface 2421, or in other words, the second end surface 2422 is closer to the oil collecting tank 120 than the first end surface 2421. In one embodiment, the second end surface 2422 is vertically positioned below the first end surface 2421 to further guide the lubricating oil in the oil stirring channel 250, ensuring that the lubricating oil in the oil stirring channel 250 flows into the oil collecting tank 120.

[0124] On the other hand, at the position where the bottom of the first gear 211 is immersed in the lubricating oil in the oil reservoir 243, the distance h0 between the liquid level of the lubricating oil in the oil reservoir 243 and the rotation center of the first gear 211 is defined to be less than or equal to the radius a1 of the tooth root circle A of the first gear 211. Figure 9 A partial diagram shows that in the first gear 211, the root portions 2111a of any two transmission teeth 2111 are aligned with the root circle A of the first gear 211. The distance h0 between the level of the lubricating oil in the oil reservoir 243 and the rotation center of the first gear 211 is set to be less than or equal to the radius a1 of the root circle A of the first gear 211. This ensures that the lubricating oil in the oil reservoir 243 completely submerges at least the transmission teeth 2111 at the bottom of the first gear 211. This further ensures that the first gear 211 extends deep into the lubricating oil. This ensures that once the rotational speed of the first gear 211 reaches a certain threshold, it can stir sufficient lubricating oil into the oil supply 100, thereby providing reliable passive lubrication for the gear set 210.

[0125] Therefore, on the side of the gearbox 200 of the present application, the oil supply device 100 can receive the lubricating oil provided by the oil delivery component 230, and the lubricating oil fed into the first gear 211 through the oil stirring channel 250, thereby realizing the functions of active lubrication and passive lubrication for the gear set 210 respectively. The automobile powertrain 500 of the present application drives the automobile to move forward by outputting the rotational speed. The speed of the automobile will change during the driving process, and the rotational speed output by the corresponding automobile powertrain 500 will also change. The automobile powertrain 500 has a high-speed rotation working condition and a low-speed rotation working condition. There is a difference in the amount of lubricating oil required by the generator 300 and the gearbox 200 under the two working conditions. It can be understood that when the automobile powertrain 500 is in a low-speed rotation condition, the heat it generates is relatively low and the demand for lubricating oil is relatively small. At this time, the oil supply device 100 can, with the cooperation of the oil delivery component 230, realize active lubrication of the gear set 210 and meet the working requirements of the gear set 210; and when the automobile powertrain 500 is in a high-speed rotation condition, the heat it generates is relatively high and the demand for lubricating oil is relatively large. At this time, the first gear 211 with a higher speed can deliver the lubricating oil in the oil storage tank 243 into the oil supply device 100 through the oil stirring channel 250 to achieve the effect of passive lubrication.

[0126] It will be appreciated that the low-speed and high-speed operating conditions of the transmission 200 of the present application are merely comparisons relative to the speed of the same transmission 200 itself. Due to factors such as differences in motor 300 power and transmission ratios of the transmission 200 among different automotive powertrains 500, the automotive powertrain utilizing the present invention can adjust the timing and amount of passive lubrication intervention in the transmission 200, thereby meeting the operating requirements of different automotive powertrains 500. For example, by adjusting the capacity of the oil reservoir 243 within the transmission 200, the lubricating oil level, and the width of the oil stirring channel 250 formed between the first gear 211 and the inner cavity 240, the amount of lubricating oil delivered to the oil supply 100 by the first gear 211 through the oil stirring channel 250 can be adjusted accordingly, or the speed threshold at which the first gear 211 can achieve the oil stirring function can be adjusted, thereby achieving the effect of adjusting the timing of passive lubrication intervention and the amount of passive lubrication oil.

[0127] Correspondingly, regarding active lubrication, the automotive powertrain 500 of the present application can also adjust the amount of lubricating oil used for active lubrication by adjusting the power of the oil pump 232 in the oil delivery assembly 230, thereby meeting the operating requirements of different automotive powertrains 500. Understandably, under low-speed operating conditions, the speed of the gear set 210 also varies between higher and lower speeds. In this case, the oil pump 232 can also adjust its power, allowing the oil supply 100 to adjust the amount of lubricating oil delivered even under low speeds of the gear set 210, thereby matching the synchronous lubrication requirements of the gear set 210 under low-speed operating conditions. Regarding passive lubrication, because the faster the speed of the first gear 211, the greater the amount of lubricating oil it stirs and delivers to the oil sump 120, the transmission 200 of the present application also has the capability of passive lubrication self-adaptation. That is, the speed of the first gear 211 is positively correlated with the amount of lubricating oil received by the gear set 210.

[0128] On the other hand, the automotive powertrain 500 employing the present invention can, under different speed conditions, control the oil pump 232 to enable the oil supply 100 to only actively lubricate the gear set 210, or only passively lubricate the gear set 210, or even achieve simultaneous active and passive lubrication of the gear set 210 by the oil supply 100, thereby meeting the lubrication and cooling requirements of the gear set 210 at different speeds. In one embodiment, when the automotive powertrain 500 controls the speed of the motor 300 to be within 2000 rpm, only the oil pump 232 is controlled to deliver lubricating oil to the oil supply 100 to actively lubricate the gear set 210. At this time, the output speed of the gearbox 200 can be within 1000 rpm. When the speed of the motor 300 is equal to or greater than 2000 rpm, the lubricating oil stirred by the first gear 211 can enter the oil sump 120 through the oil stirring channel 250. The oil supply 100 then uses the lubricating oil supplied by the oil stirring channel 250 to lubricate the gear set 210. When the speed of the motor 300 is equal to or greater than 200 rpm, the oil pump 232 can continue to operate and continuously provide active lubrication to the gear set 210. Alternatively, the oil pump 232 can stop operating, and the oil supply 100 can only provide passive lubrication to the gear set 210.

[0129] In some scenarios, gear set 210 may contain other parts that only require passive or active lubrication during transmission 200 operation to meet operational requirements. For example, some parts of gear set 210 may require only active lubrication when transmission 200 is operating at either high or low speeds. Alternatively, other parts of gear set 210 may require no lubrication when transmission 200 is operating at low speeds, but require passive lubrication when transmission 200 is operating at high speeds. For these parts of gear set 210, oil supply unit 100 may also be configured with corresponding oil delivery routes to meet the operational needs of each part.

[0130] See Figure 10 and Figure 11The figure shows the outer appearance of the oil supply device 100 provided in one embodiment of the present application. The oil supply device 100 includes an oil collecting tank 120 and a sealed chamber 110. The oil collecting tank 120 and the sealed chamber 110 are fixedly connected, and the oil collecting tank 120 is located above the sealed chamber 110. The interior of the sealed chamber 110 is a sealed structure, and an oil inlet 111 and a plurality of oil injection pipes 112 are also provided outside the sealed chamber 110. The oil inlet 111 and the plurality of oil injection pipes 112 are all connected to the internal sealed structure of the sealed chamber 110. The oil inlet 111 is used to communicate with the oil delivery pipeline 231 of the oil delivery component 230. The oil delivery component 230 delivers lubricating oil from the oil reservoir 243 to the sealed chamber 110 through the oil delivery pipeline 231. The oil injection pipes 112, which are also connected to the sealed chamber 110, extend in a direction away from the sealed chamber 110. Specifically, each oil injection pipe 112 extends toward a part of the gear set 210 to be lubricated. Lubricating oil fed into the sealed chamber 110 through the oil inlet 111 builds up a certain pressure within the sealed chamber 110 and is ejected from the sealed chamber 110 through the various oil spray pipes 112. This pressure then acts on the various lubricated parts of the gear set 210, thereby delivering lubricating oil to these parts. It will be appreciated that the number of oil spray pipes 112 can be matched to the number of lubricated parts in the gear set 210, i.e., each oil spray pipe 112 extends toward a corresponding lubricated part in the gear set 210, thereby achieving the effect of actively lubricating all lubricated parts of the gear set 210.

[0131] The oil collecting tank 120 includes a bottom plate 121 and side plates 122. The bottom plate 121 is fixedly connected to the sealed chamber 110, and the side plates 122 are arranged around the periphery of the bottom plate 121, thereby forming an upper opening 123 above the bottom plate 121. The upper opening 123 is the opening of the oil collecting tank 120. The lubricating oil transported from the oil stirring channel 250 enters the oil collecting tank 120 through the upper opening 123. The oil collecting tank 120 is also connected to the oil delivery tank 124, and the number of oil delivery tanks 124 in the oil supply 100 is the same as the number of oil injection pipes 112. Each oil delivery tank 124 also extends in a direction away from the oil collecting tank 120, and each oil delivery tank 124 extends toward a lubricated part of the gear set 210, thereby transporting the lubricating oil collected in the oil collecting tank 120 to the various lubricated parts of the gear set 210.

[0132] It is understood that since each oil injection pipe 112 extends toward a lubricated portion of the gear set 210, and each oil delivery groove 124 also extends toward a lubricated portion of the gear set 210, each oil delivery groove 124 can be arranged to extend parallel to an oil injection pipe 112 to act on a lubricated portion of the gear set 210. That is, in the oil supply device 100 of the present application, each oil injection pipe 112 and its corresponding oil delivery groove 124 are arranged as a set, and the oil injection pipes 112 and oil delivery grooves 124 in the same set extend in the same direction and act on a lubricated portion of the gear set 210 to deliver lubricating oil. When the oil supply device 100 performs active lubrication through the sealed chamber 110, the oil injection pipe 112 extending from the sealed chamber 110 to the part to be lubricated can deliver the lubricating oil delivered by the oil delivery assembly 230; when the oil supply device 100 performs passive lubrication through the oil collecting tank 120, the oil delivery tank 124 extending from the oil collecting tank 120 to the part to be lubricated can deliver the lubricating oil delivered by the first gear 211. Therefore, the oil supply device 100 of the present application can provide lubricating oil to each part to be lubricated of the gear set 210 through the arrangement of multiple groups of oil injection pipes 112 and oil delivery tanks 124, and achieves the effect of active lubrication combined with passive lubrication for each part to be lubricated, ensuring that the gear set 210 can be reliably lubricated under both high-speed and low-speed operating conditions, thereby improving the transmission efficiency and reliability of the gear set 210 and extending the service life of the gear set 210.

[0133] See Figure 12 As shown in FIG. 1 , in one embodiment, the oil injection pipe 112 includes a lateral oil injection pipe 1121. Lateral oil injection pipe 1121 extends horizontally away from the sealed chamber 110. The oil delivery trough 124 includes a lateral oil delivery trough 1241, which also extends horizontally away from the oil delivery trough 222. One lateral oil delivery trough 1241 extends parallel to one lateral oil injection pipe 1121. Because the oil collecting trough 120 is located above the sealed chamber 110, the lateral oil delivery trough 1241 is also located above the lateral oil injection pipe 1121. The two extend parallel to each other toward a portion to be lubricated in the gear set 210.

[0134] In this embodiment, the oil supply 100 is relatively small, while the gear set 210 is relatively large. Therefore, when the smaller oil supply 100 is positioned on the side of the gear set 210 facing away from the oil reservoir 243, some of the parts to be lubricated on the gear set 210 may be located laterally of the oil collecting tank 120 and the sealing chamber 110. The provision of the horizontally extending lateral oil injection pipe 1121 and lateral oil delivery trough 1241 enables the oil supply 100 to lubricate some of the laterally located parts to be lubricated.

[0135] The lateral oil delivery groove 1241 is connected to the side plate 122 of the oil collecting tank 120. Figure 13As shown in FIG. 1 , a notch 1225 is formed in the side plate 122. The lateral oil trough 1241 includes a bottom 1242 and a wall 1243. The bottom 1242 of the lateral oil trough 1241 is connected to the bottom plate 121 of the oil collecting tank 120 and extends horizontally toward a portion of the gear set 210 to be supplied with oil. The lateral oil trough 1241 has two walls 1243, one on each side of the bottom 1242 and both located above the bottom 1242. Two groove walls 1243 are connected to the side plates 122 on opposite sides of the notch 1225. These walls 1243 extend synchronously with the groove bottom 1242 toward the area to be supplied with oil. These walls 1243 and the groove bottom 1242 work together to direct the lubricating oil flowing out of the notch 1225 from the oil collecting trough 120 to the area to be supplied with oil, and then flow down the end of the oil delivery trough 124 facing away from the oil collecting trough 120, thereby lubricating the area to be supplied with oil. Furthermore, the groove bottom 1242 includes a first end 1242a located near the notch 1225 and a second end 1242b located away from the oil collecting trough 120. Vertically, the second end 1242b is located below or flush with the first end 1242a. Therefore, when the oil delivery groove 124 extends toward the part to be lubricated, its groove bottom 1242 extends toward the part to be lubricated in an inclined downward or horizontal direction, thereby ensuring the flow direction of the lubricating oil in the oil delivery groove 124, so that the lubricating oil in the oil delivery groove 124 can flow smoothly from the first end 1242a side to the second end 1242b side under the action of gravity.

[0136] It is understood that the lateral oil injection pipe 1121 located below the lateral oil delivery groove 1241 can also be arranged to be tilted synchronously with the lateral oil delivery groove 1241, that is, the lateral oil injection pipe 1121 is located away from the end of the sealed chamber 110 and is located vertically below the end of the lateral oil injection pipe 1121 close to the sealed chamber 110, or the two are arranged flush. This can also ensure that the lubricating oil in the lateral oil injection pipe 1121 flows toward the part to be lubricated.

[0137] In one embodiment, when the oil collecting tank 120 is connected to multiple lateral oil delivery tanks 1241, multiple notches 1225 are required on the side plate 122. The number of the multiple lateral oil delivery tanks 1241 is the same as the number of the multiple notches 1225, and each lateral oil delivery tank 1241 is fixed to a corresponding notch 1225 and is connected to the oil collecting tank 120 through the notch 1225. In one embodiment, the bottom 1242 of the multiple lateral oil delivery tanks 1241 each has a corresponding first end 1242a. In this case, it is preferable to arrange the multiple first ends 1242a flush in the horizontal direction so that the lubricating oil in the oil collecting tank 120 can be evenly distributed to each lateral oil delivery tank 1241, and the lubricating oil can be evenly provided to the multiple parts to be lubricated of the gear set 210.

[0138] See Figure 14 A schematic cross-sectional view of a group of mutually parallel lateral oil injection pipes 1121 and lateral oil delivery grooves 1241. Figure 14 In this embodiment, the lateral oil injection pipe 1121 and the lateral oil delivery trough 1241 both extend along the first horizontal direction 001. The extension length of the lateral oil injection pipe 1121 in the first horizontal direction 001 is shorter than the extension length of the lateral oil delivery trough 1241. In this embodiment, because the lateral oil injection pipe 1121 is connected to the sealed chamber 110, and the lubricating oil in the sealed chamber 110 is under pressure due to the oil delivery assembly 230, the lubricating oil flowing out of the lateral oil injection pipe 1121 has a certain initial velocity under the action of this pressure. This initial velocity is parallel to the first horizontal direction 001. In contrast, because the oil collecting trough 120 has an upper opening 123, the lubricating oil in the oil collecting trough 120 flows solely by gravity through the lateral oil delivery trough 1241 to the lubricated parts. Therefore, the initial velocity of the lubricating oil flowing out of the lateral oil delivery trough 1241 in the first horizontal direction 001 is relatively low. In order to ensure that the lubricating oil with a larger initial velocity output from the lateral oil injection pipe 1121 can act on the part to be lubricated, and at the same time ensure that the lubricating oil with a smaller initial velocity output from the lateral oil delivery groove 1241 can also act on the part to be lubricated, the extension length of the lateral oil injection pipe 1121 along the first horizontal direction 001 is appropriately shortened, which can ensure that the landing point of the lubricating oil output from the lateral oil injection pipe 1121 coincides with the landing point of the lubricating oil output from the lateral oil delivery groove 1241, and both can accurately act on the part to be lubricated.

[0139] It should be pointed out that in Figure 14 In the schematic diagram, the lateral oil injection pipe 1121 and the lateral oil delivery groove 1241 both extend along the first horizontal direction 001. In other embodiments, the lateral oil injection pipe 1121 and the lateral oil delivery groove 1241 may extend in directions other than the first horizontal direction 001, or the paths of the lateral oil injection pipe 1121 and the lateral oil delivery groove 1241 may extend successively along two or more different directions. In this case, the length of the extension structure of the lateral oil injection pipe 1121 at the farthest end from the sealed chamber 110 may be defined as shorter than the length of the extension structure of the lateral oil delivery groove 1241 at the farthest end from the oil collecting tank 120, so as to achieve the aforementioned effect of ensuring that the landing point of the lubricating oil outputted from the lateral oil injection pipe 1121 coincides with the landing point of the lubricating oil outputted from the lateral oil delivery groove 1241.

[0140] For another example, see Figure 15 In this embodiment, the lateral oil injection pipe 1121 and the lateral oil delivery groove 1241 also extend along the first horizontal direction 001. Figure 14 The difference between the embodiments is that, in this embodiment, the extension length of the lateral oil injection pipe 1121 exceeds the extension length of the lateral oil delivery groove 1241. Figure 15In the diagram, lateral oil injection pipe 1121 has an extension section 1122 that extends beyond lateral oil delivery groove 1241. An opening 1123 is provided at the top of extension section 1122. Lubricating oil delivered from lateral oil delivery groove 1241 can flow into extension section 1122 through opening 1123 and continue to flow along extension section 1122 to the part to be lubricated.

[0141] In this embodiment, because the same set of lateral oil spray pipes 1121 and lateral oil delivery grooves 1241 extend in the same direction, and lateral oil spray pipes 1121 are located above lateral oil delivery grooves 1241, the provision of openings 1123 in the upper portions of lateral oil spray pipes 1121 allows lubricating oil in lateral oil delivery grooves 1241 to flow through openings 1123 into extensions 1122. Extensions 1122 then extend toward the lubricated area, delivering the lubricating oil in lateral oil delivery grooves 1241 to the lubricated area. In other words, in this embodiment, the provision of extensions 1122 in lateral oil spray pipes 1121 allows lubricating oil in lateral oil delivery grooves 1241 to flow into lateral oil spray pipes 1121 in advance, allowing lubricating oil to be delivered via extensions 1122 of lateral oil spray pipes 1121.

[0142] As will be appreciated, in this embodiment, the extended section 1122 of the lateral oil injection pipe 1121 is used to simultaneously deliver lubricating oil for both active and passive lubrication. This also shortens the length of the lateral oil delivery groove 1241, simplifies the structure of the oil supply unit 100, and reduces its overall volume.

[0143] For an example, see Figure 16 The fuel injection pipe 112 also includes a vertical fuel injection pipe 1124 (also see Figure 11 and Figure 12 Vertical oil spray pipe 1124 extends vertically away from sealed chamber 110. Oil delivery trough 124 includes vertical oil delivery trough 1244, which also extends vertically away from oil delivery trough 222. Vertical oil delivery trough 1244 extends parallel to vertical oil spray pipe 1124. Because oil collection tank 120 is located above sealed chamber 110, vertical oil delivery trough 1244 is located to one side of vertical oil spray pipe 1124. The two extend parallel to each other toward a portion of gear assembly 210 to be lubricated.

[0144] In this embodiment, the oil supply 100 can deliver lubricating oil to lubricated areas located below the oil supply 100 via the vertical oil spray pipe 1124 and the vertical oil delivery groove 1244. When the oil supply 100 is positioned on the side of the gear set 210 facing away from the oil reservoir 243, some areas of the gear set 210 that need lubrication may also be located below the oil sump 120 and the sealed chamber 110. The vertically extending vertical oil spray pipe 1124 and the lateral oil delivery groove 1241 enable the oil supply 100 to lubricate some of the areas located below.

[0145] In one embodiment, if Figure 16 In the diagram, the vertical oil injection pipe 1124 is constructed as an opening at the bottom of the sealed chamber 110, while the vertical oil delivery groove 1244 is constructed as a through-groove extending through the sealed chamber. Furthermore, the vertical oil delivery groove 1244 is also connected to the bottom plate 121 of the oil collecting tank 120. Specifically, the bottom plate 121 of the oil collecting tank 120 is connected to a vertical oil delivery groove 1244 having a through-groove structure. This through-groove structure of the vertical oil delivery groove 1244 extends through the sealed chamber 110, allowing the lubricating oil in the oil collecting tank 120 to flow downward through the vertical oil delivery groove 1244, passing through the sealed chamber 110 and reaching the corresponding lubricated parts.

[0146] It should be noted that, for the oil supply device 100 of the present application, the oil collecting tank 120 and the sealing chamber 110 can be as follows: Figure 10-13 As shown, the oil collecting tank 120 and the sealing chamber 110 can also be configured as follows: Figure 16 As shown, the oil collecting tank 120 is configured as an integrated structure. The bottom plate 121 of the oil collecting tank 120 can serve to form the top structure of the sealed chamber 110, and the side plates 122 of the oil collecting tank 120 can also extend below the bottom plate 121 to form the side structure of the sealed chamber 110. The integrated configuration of the oil collecting tank 120 and the sealed chamber 110 can reduce the overall volume of the oil supply device 100, thereby accommodating the miniaturization of the gearbox 200.

[0147] In one embodiment, corresponding to the possibility that some parts of the gear set 210 require only passive lubrication or active lubrication, the oil supply 100 may further include an auxiliary oil supply tank (not shown) and an auxiliary oil spray pipe (not shown) independent of the oil supply tank 124 or the oil spray pipe 112 to separately provide lubricating oil to these parts. For example, when the gearbox 200 is operating at high or low speeds, only active lubrication oil is required to meet the working requirements of the parts. The oil supply 100 may include an auxiliary oil spray pipe connected to the sealing chamber 110, extending toward the parts requiring active lubrication to provide only active lubrication to these parts. Alternatively, when the gearbox 200 is operating at low speeds and requires no lubrication but requires passive lubrication to meet the working requirements of the parts at high speeds, the oil supply 100 may include an auxiliary oil supply tank connected to the oil collection tank 120, extending toward the parts requiring passive lubrication to provide passive lubrication to these parts. The auxiliary oil delivery tank and the auxiliary oil injection pipe are respectively provided independently of the oil delivery tank 124 and the oil injection pipe 112 , further expanding the scope of application of the oil supply device 100 of the present application.

[0148] For an example, see Figure 17 The side plate 122 includes a first side plate 1221 located near the first gear 211, and a second side plate 1222 located opposite the first side plate 1221. The first side plate 1221 has a first height h1 relative to the bottom plate 121, and the second side plate 1222 has a second height h2 relative to the bottom plate 121, with the second height h2 being higher than the first height h1. It is understood that because the first side plate 1221 is closer to the first gear 211 than the second side plate 1222, when the gear set 210 rotates, the lubricating oil stirred by the first gear 211 is sent from the oil stirring channel 250 into the oil collecting tank 120. This is done from the side of the upper opening 123 near the first side plate 1221. Setting the first side plate 1221 relatively low ensures that the lubricating oil can smoothly pass over the first side plate 1221 and enter the oil collecting tank 120. The second side plate 1222 is set at a relatively high height, which can intercept more lubricating oil at a position away from the first gear 211 and make it fall into the oil collecting tank 120, thereby ensuring that the amount of lubricating oil in the oil collecting tank 120 meets the working requirements of the gear set 210.

[0149] It should be noted that the height of the first side plate 1221 relative to the bottom plate 121, and the height of the second side plate 1222 relative to the bottom plate 121, are both relative to the bottom plate 121 on the same horizontal plane as a reference. That is, the heights of the first side plate 1221 and the second side plate 1222 can be understood as absolute heights in the vertical direction, with the reference starting point being the horizontal plane on which the bottom plate 121 resides. Therefore, in some embodiments, even if the bottom plate 121 is configured as an inclined or stepped structure, this can still ensure that the height of the second side plate 1222 is higher than that of the first side plate 1221, achieving better lubricating oil collection.

[0150] For an example, see Figure 18 The side plate 122 also includes a first side plate 1221 positioned adjacent to the first gear 211, and a second side plate 1222 positioned opposite the first side plate 1221. Furthermore, the side plate 122 also includes a third side plate 1223 positioned between the first side plate 1221 and the second side plate 1222. The third side plate 1223 protrudes from the bottom plate 121 and has a third height h3 relative to the bottom plate 121, which is also higher than the first height h1. In this embodiment, the third side plate 1223 intercepts the lubricating oil delivered by the first gear 211, thereby ensuring that the amount of lubricating oil in the oil sump 120 meets the operating requirements of the gear set 210. It will be appreciated that in this embodiment, the height of the third side plate 1223 relative to the bottom plate 121 is also referenced on the same horizontal plane as the height of the first side plate 1221 relative to the bottom plate 121. That is, the third height h3 of the third side plate 1223 and the first height h1 of the first side plate 1221 can also be understood as absolute heights in the vertical direction.

[0151] For an example, see Figure 19 The bottom plate 121 includes a first side 1211 and a second side 1212. The first side 1211 is located near the first gear 211, and the second side 1212 is located relatively far away from the first gear 211. The second side 1212 is flush with the first side 1211 in the vertical direction, or higher than the first side 1211. That is, the oil collecting tank 120 is fixed in the box body in a relatively tilted posture, and the side of the tilted oil collecting tank 120 close to the first gear 211 is relatively lower. Figure 17 and Figure 18Similar to the embodiment of the present application, in the embodiment of the present application, when the gear set 210 rotates, the lubricating oil stirred by the first gear 211 is sent into the oil collecting tank 120 from the upper opening 123 close to the first side 1211. When the second side 1212 is located above the first side 1211 in the vertical direction, or is flush with the first side 1211, the lubricating oil stirred by the first gear 211 is able to fall more into the oil collecting tank 120, thereby ensuring that the amount of lubricating oil in the oil collecting tank 120 meets the working requirements of the gear set 210, thereby achieving better lubrication effect.

[0152] It is understandable that the bottom plate 121 can be as follows Figure 19 As shown, the structure is a flat plate structure. In this case, the bottom plate 121 needs to be tilted so that the first side 1211 is lower than the second side 1212 to achieve more lubricating oil collection; the bottom plate 121 can also be as Figure 18 As shown, it consists of a first plate 1213 and a second plate 1214 fixedly connected to each other. The first side 1211 is formed on the side of the first plate 1213 away from the second plate 1214, and the second side 1212 is formed on the side of the second plate 1214 away from the first plate 1213. The first plate 1213 is fixed in a horizontal position in the housing to ensure that the lubricating oil in the oil collecting tank 120 can flow relatively evenly to the various lateral oil delivery grooves 1241. The second plate 1214 is tilted relative to the first plate 1213 to elevate the second side 1212 and collect more lubricating oil.

[0153] For an example, see Figure 20 , a plurality of oil guide plates 125 are also provided on the bottom plate 121 (see also Figure 14 and Figure 10 ), multiple oil guide plates 125 are spaced apart and protruded from the bottom plate 121. These divide the interior of the oil collecting tank 120 into multiple oil collecting areas 126. Some of these oil collecting areas 126 are connected to different parts of the side plates 122, and the side plates 122 have a corresponding notch 1225 at the location where they connect to each oil collecting area 126. The remaining oil collecting areas 126 are connected to different vertical oil delivery grooves 1244 on the bottom plate 121. For ease of description, Figure 20 Only part of the oil gathering area 126 is shown in the figure. Figure 20 There are more oil collecting areas 126 in the oil conveying tank, and each oil conveying tank 124 is connected to an oil collecting area 126.

[0154] As mentioned above, each notch 1225 of the side plate 122 is connected to a lateral oil delivery groove 1241. Therefore, some of the oil collection areas 126 connected to the side plate 122 are actually connected to a lateral oil delivery groove 1241, while the remaining oil collection areas 126 are connected to the vertical oil delivery groove 1244. Thus, each oil collection area 126 divided by the oil guide plate 125 is connected to a separate oil delivery groove 124. In other words, each oil delivery groove 124 is used to transport the lubricating oil in one oil collection area 126 to the corresponding location to be supplied with oil.

[0155] It is understandable that by adjusting the spacing between the oil guide plates 125, the size of each oil collecting area 126 can be adjusted. Under the premise that the lubricating oil level in the oil collecting tank 120 tends to be consistent, the oil collecting area 126 with a larger area carries a larger amount of lubricating oil, and the flow rate of lubricating oil delivered by the oil delivery tank 124 connected to the oil collecting area 126 also increases accordingly. During the operation of the gear set 210, the amount of lubricating oil required for each part to be lubricated may be different. In the part to be lubricated with a larger meshing area of ​​some gears, more lubricating oil may be required for lubrication. Therefore, by using the oil guide plates 125 to divide the internal space of the oil collecting tank 120 to form oil collecting areas 126 of different sizes, lubricating oil can be allocated according to the needs of each part to be lubricated, further improving the lubrication effect of the oil supply device 100 on the gear set 210.

[0156] In one possible embodiment, multiple oil guide plates 125 are each provided with a straight section 1251, and each straight section 1251 of each oil guide plate 125 extends to a position near the second side 1212 of the base plate 121. The multiple straight sections 1251 are parallel to each other and fixedly spaced apart. The straight sections 1251 of the multiple oil guide plates 125 are parallel to each other and fixedly spaced apart on the second side 1212, forming multiple channels for guiding the flow of lubricating oil on the second side 1212 of the base plate 121. It will be appreciated that each channel is connected to an oil collection area 126. Specifically, the multiple parallel, fixedly spaced straight sections 1251 guide the lubricating oil on the second side 1212, allowing lubricating oil entering the oil collecting tank 120 from this side to be directed to each oil collection area 126.

[0157] As mentioned above, the lubricating oil fed from the first gear 211 into the oil collecting tank 120 via the oil stirring channel 250 must pass over the side plate 122 at the first side 1211 before falling into the oil collecting tank 120. Therefore, the lubricating oil collected in the oil collecting tank 120 primarily enters the oil collecting tank 120 near the second side 1212. Providing straight sections 1251 on each oil guide plate 125, and ensuring that each straight section 1251 extends near the second side 1212, facilitates diverting the majority of the lubricating oil once it enters the oil collecting tank 120 and directing the diverted lubricating oil to the various oil collecting areas 126. It can be understood that by adjusting the spacing between each straight section 1251 at the second side 1212, the diversion area of ​​each channel can also be adjusted accordingly, thereby realizing the distribution of the lubricating oil entering the oil collecting tank 120 from the second side 1212, and also meeting the different lubricating oil quantity requirements of each part to be lubricated of the gear set 210.

[0158] It should be noted that, in some embodiments, the straight section 1251 may also extend toward the second side plate 1222 or the third side plate 1223, and form an oil distribution channel on the side of the second side plate 1222 close to the first gear 211, or on the side of the third side plate 1223 close to the first gear 211 (see Figure 18 ) to effectively distribute the lubricating oil while intercepting the lubricating oil on the first side plate 1221 or the third side plate 1223. This embodiment further enhances the flow of lubricating oil in the oil collecting tank 120 by the oil guide plate 125 and ensures that the lubricating oil collected in each oil collecting area 126 meets the working requirements of the corresponding lubricated parts.

[0159] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of changes or substitutions within the technical scope disclosed in the present application, such as reducing or adding structural parts, changing the shape of structural parts, etc., which should be included in the scope of protection of the present application. The embodiments of the present application and the features of the embodiments can be combined with each other unless there is a conflict. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. A gearbox, characterized in that: It comprises a box body with an inner cavity, and a gear set and an oil feeder accommodated in the box body; An oil reservoir for carrying lubricating oil is provided at the bottom of the inner cavity; The oil feeder is fixed to the side of the gear set away from the oil reservoir, and includes a sealed chamber and an oil collecting tank that are fixedly connected. The oil collecting tank includes a bottom plate and side plates, and the side plates are arranged around the periphery of the bottom plate. The bottom plate of the oil collecting tank is located above the sealed chamber; The sealed chamber is provided with an oil inlet and at least one oil spray pipe, the at least one oil spray pipe extending in different directions; the sealed chamber is used to receive lubricating oil from the oil reservoir fed through the oil inlet and spray the lubricating oil toward at least one part to be lubricated of the gear set through the at least one oil spray pipe; The oil collecting tank has an upper opening, and the oil collecting tank is used to receive the lubricating oil in the oil storage tank stirred by the gear set through the upper opening when the gear set rotates. The oil collecting tank is also provided with at least one oil delivery tank, and the number of the oil delivery tanks is the same as the number of the oil injection pipes. Any of the oil delivery tanks is provided corresponding to one of the oil injection pipes, and is used to lubricate the same part to be lubricated with the corresponding oil injection pipe.

2. The gearbox according to claim 1, wherein: The gear set includes a first gear and a second gear that mesh with each other, and the first gear and the second gear are respectively rotatably connected to the box; The bottom of the first gear is located in the oil reservoir and immersed in the lubricating oil. The first gear rotates from bottom to top on the side away from the second gear and is spaced apart from the inner wall of the box to form an oil stirring channel. When the first gear rotates, it can drive the lubricating oil in the oil reservoir into the oil collecting tank through the oil stirring channel.

3. The gearbox according to claim 2, wherein: The oil feeder is arranged on the side of the first gear close to the second gear, and the inner wall of the box body includes a first side wall and a top wall, the first side wall is located on the side of the first gear away from the second gear, and the top wall is located above the first side wall, and the first side wall and the top wall together form an oil stirring channel with the first gear.

4. The gearbox according to claim 2 or 3, characterized in that: The distance between the liquid level of the lubricating oil in the oil storage tank and the rotation center of the first gear is less than or equal to the root circle radius of the first gear.

5. The gearbox according to any one of claims 2 to 4, characterized in that: The gearbox also includes an oil delivery component, which includes an oil delivery pipeline and an oil delivery pump. One end of the oil delivery pipeline is connected to the oil inlet of the oil supplier, and the other end is connected to the oil storage tank. The oil delivery pump is used to pump the lubricating oil in the oil storage tank into the sealed compartment through the oil delivery pipeline.

6. The gearbox according to any one of claims 2 to 5, characterized in that: The first gear and the second gear mesh with each other at a first meshing position, and the at least one part to be lubricated includes the first meshing position.

7. The gearbox according to any one of claims 2 to 6, characterized in that: The gear set also includes a first gear shaft, a second gear shaft, a first bearing and a second bearing. The first gear shaft is fixedly connected to the first gear, and the second gear shaft is fixedly connected to the second gear. The first bearing is used to realize the rotational connection between the first gear shaft and the box body, and the second bearing is used to realize the rotational connection between the second gear shaft and the box body. The part to be lubricated also includes the position of the first bearing and the position of the second bearing.

8. The gearbox according to any one of claims 2 to 7, characterized in that: The side plate includes a first side plate close to the first gear and a second side plate opposite to the first side plate, the first side plate has a first height from the bottom plate, the second side plate has a second height from the bottom plate, and the first height is lower than the second height.

9. The gearbox according to any one of claims 1 to 8, characterized in that: The at least one fuel injection pipe includes a lateral fuel injection pipe, and the lateral fuel injection pipe extends in a horizontal direction and in a direction away from the sealed chamber; The at least one oil delivery groove includes a lateral oil delivery groove, and a notch connected to the lateral oil delivery groove is opened on the side plate. The extension direction of the lateral oil delivery groove is the same as the extension direction of the corresponding lateral oil injection pipe, and is located above the corresponding lateral oil injection pipe.

10. The gearbox according to any one of claims 1 to 9, characterized in that: The at least one fuel injection pipe includes a vertical fuel injection pipe, and the vertical fuel injection pipe extends in a vertical direction away from the sealed chamber; The at least one oil delivery trough includes a vertical oil delivery trough, which is fixedly connected to the bottom plate of the oil collecting trough and is constructed as a through groove running through the sealed chamber. The extension direction of the vertical oil delivery trough is the same as the extension direction of the corresponding vertical oil injection pipe and is located on one side of the corresponding vertical oil injection pipe.

11. The gearbox according to any one of claims 1 to 10, characterized in that: There are multiple oil delivery troughs, and at least one oil guide plate is provided on the bottom plate. The at least one oil guide plate divides the internal space of the oil collecting trough into at least two oil collecting areas. The number of the oil collecting areas is the same as the number of the oil delivery troughs, and each oil delivery trough is connected to one oil collecting area.

12. An automobile powertrain, characterized in that: It comprises a motor and a gearbox according to any one of claims 1 to 11, wherein the motor is fixedly connected to the gearbox, and the motor is used to drive the gear set in the gearbox to rotate.

13. The automotive powertrain according to claim 12, wherein: The automobile powertrain is also provided with a cooling system, which is used to transport the lubricating oil in the oil reservoir to the motor to cool the motor.

14. The automotive powertrain according to claim 13, wherein: The cooling system includes an oil inlet pipe, an oil return pipe, and a heat exchanger. The oil inlet pipe and the oil return pipe are both connected between the oil reservoir and the motor. After the lubricating oil flows from the oil inlet pipe into the motor to cool it down, it flows back to the oil reservoir through the oil return pipe. The heat exchanger is connected in series to the oil inlet pipe or the oil return pipe to cool the lubricating oil.

15. An automobile, characterized in that: The automobile comprises wheels and an automobile powertrain according to any one of claims 12 to 14, wherein the automobile powertrain is used to drive the wheels to rotate.

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