Power assembly with multi-section variable-aperture oil injection pipe, oil injection pipe and vehicle

Abstract

The utility model provides a power assembly with a multi-section variable-aperture oil injection pipe, the multi-section variable-aperture oil injection pipe and a vehicle. The power assembly comprises a shell and an oil spraying pipe, the shell is used for containing at least one of a speed reducer or a motor of the power assembly and the oil spraying pipe, the oil spraying pipe comprises an oil conveying pipe, the oil conveying pipe comprises a first section and a second section which are integrally formed, and the hole diameter of the first section is smaller than that of the second section. In the flowing direction of the cooling oil, one first section is used for receiving the cooling oil and conveying the cooling oil to one second section, and one second section is used for outputting the cooling oil to lubricate a gear or a bearing of the speed reducer or dissipate heat of the stator winding end of the motor. Through the structural design of the oil conveying pipe in the oil spraying pipe carried by the power assembly, the oil spraying pipe can meet the conveying requirements of cooling oil under different working conditions.

Description

Technical Field

[0001] The present application relates to the technical field of powertrain, and in particular to a powertrain with a multi-section variable aperture fuel injection pipe, a multi-section variable aperture fuel injection pipe and a vehicle. Background Art

[0002] Using cooling oil to lubricate and dissipate heat for the internal functional structural devices such as the reducer and motor of the powertrain is one of the keys to ensure the normal and stable operation of the powertrain. Among them, the cooling oil is generally transported to various locations in the powertrain to be lubricated or dissipated through the oil pipe in the injection pipe. However, the injection pipe installed in the powertrain is limited by the manufacturing process and cannot meet the transportation requirements of cooling oil under various working conditions. Utility Model Content

[0003] The present application provides a powertrain with a multi-section variable aperture fuel injection pipe. By optimizing the structural design of the oil delivery pipe in the fuel injection pipe carried by the powertrain in a targeted manner, the fuel injection pipe can meet the delivery requirements of cooling oil under different working conditions. The present application also provides a multi-section variable aperture fuel injection pipe and a vehicle. The present application specifically includes the following technical solutions:

[0004] In a first aspect, the present application provides a powertrain with a multi-section variable-aperture fuel injection pipe, the powertrain comprising a housing and a fuel injection pipe, the housing being used to accommodate at least one of a reducer or a motor of the powertrain and a fuel injection pipe, a fuel injection pipe comprising an oil delivery pipe, an oil delivery pipe comprising an integrally formed first section and a second section, the aperture of a first section being smaller than the aperture of a second section, wherein, along the flow direction of the cooling oil, a first section is used to receive cooling oil and to deliver cooling oil to a second section, and a second section is used to output cooling oil to lubricate a gear or a bearing of the reducer or to dissipate heat from the stator winding end of the motor.

[0005] The cooling oil in the power assembly of the present application flows into an oil pipe from an opening of a first section away from a second section along the flow direction of the cooling oil, so that the cooling oil flowing into a first section can be transported to a second section, and flows out from an opening of a second section away from a first section along the flow direction of the cooling oil. The function of transporting cooling oil by an oil pipe can be realized through the cooperation of a first section and a second section, and then the cooling oil is transported to various positions to be lubricated or cooled in the power assembly through an oil pipe. An oil pipe extends along the flow direction of the cooling oil, so that the cooling oil transported by an oil pipe can be accurately and effectively transported to various positions to be lubricated or cooled in the power assembly, so as to ensure the lubrication and cooling effect of various functional devices in the power assembly, and improve the working efficiency and life of the power assembly. At the same time, a second section is directed away from an opening of the first section along the flow direction of the cooling oil toward a gear of the reducer, a bearing or the stator winding end of the motor, and can transport the cooling oil in an oil pipe to the outer circumferential surface of a gear, a bearing or the stator winding end, so as to achieve a lubrication effect on a gear or a bearing, or achieve a cooling effect on the stator winding end, thereby improving the working performance and life of the reducer or the motor.

[0006] An oil pipeline in the powertrain of the present application is prepared by an integrated manufacturing process, and the aperture in the oil pipeline is designed in sections, that is, the aperture of each section in the oil pipeline increases in sequence along the flow direction of the cooling oil, which reduces the manufacturing difficulty and precision requirements when the aspect ratio of the oil pipeline is too large. While improving the manufacturing precision and requirements of an oil pipeline, the extension length of the oil pipeline along the flow direction of the cooling oil can also be increased, thereby meeting the long-distance oil delivery requirements between an oil injection pipe and various positions to be lubricated or to be dissipated in the powertrain. At the same time, the aperture in the oil pipeline along the flow direction of the cooling oil is increased in sections, so that an oil pipeline can break through the aspect ratio limitation during preparation, and the extension length of an oil pipeline is increased, so that when the cooling oil is in a low temperature condition or the pressure is low, the cooling oil can be transported to various positions to be lubricated or to be dissipated in the powertrain, ensuring the lubrication efficiency of a gear or a bearing of the reducer, or the heat dissipation efficiency of the stator winding end of the motor, thereby improving the working efficiency and life of the powertrain.

[0007] In one implementation, an oil pipeline is an injection molded part.

[0008] Accordingly, the use of injection molding technology to prepare an oil pipeline allows the oil pipeline to be formed in one piece, which reduces the difficulty of preparing an oil pipeline and improves the efficiency of preparing an oil pipeline, thereby improving the overall preparation efficiency of the powertrain. The material of the injection molded parts is usually rubber or plastic with a relatively light weight. Therefore, preparing an oil pipeline through the injection molding process can reduce the weight of an oil pipeline, thereby reducing the overall weight of the powertrain to meet the lightweight design requirements of the powertrain. In other words, an oil pipeline is formed in one piece through the injection molding process, so that the oil pipeline can meet the transportation requirements of cooling oil under various working conditions, and can also take into account the lightweight design requirements of the powertrain.

[0009] In one implementation, an oil pipeline includes a connecting section, which is used to connect a first section and a second section along the flow direction of the cooling oil, and the aperture of at least one of the connecting section, the first section or the second section gradually increases along the flow direction of the cooling oil.

[0010] Accordingly, along the flow direction of the cooling oil, a connecting section is located between a first section and a second section, and two openings of a connecting section opposite to each other are connected to a first section and a second section respectively, so that a connecting section can achieve the effect of connecting a first section and a second section, and then the cooling oil in a first section can be transported to a second section, so as to transport the cooling oil to a gear, a bearing or a stator winding end. At the same time, the aperture of a connecting section gradually increases along the flow direction of the cooling oil, that is, a connecting section is constructed as a chamfered structure between a first section and a second section, and the inner diameter of the chamfered structure gradually increases along the flow direction of the cooling oil, which can further reduce the difficulty of preparing an oil pipeline and improve the efficiency and effect of preparing an oil pipeline. In addition, the aperture of at least one section of an oil pipeline gradually increases along the flow direction of the cooling oil, which can further reduce the difficulty and requirements of preparing an oil pipeline.

[0011] In one implementation, the outer diameter of a first section is smaller than or equal to the outer diameter of a second section, and the outer diameter of a connecting section is greater than or equal to the outer diameter of a first section and smaller than or equal to the outer diameter of a second section.

[0012] Accordingly, the outer diameter of an oil pipeline is designed in sections along the flow direction of the cooling oil, and multiple outer diameters increase successively along the flow direction of the cooling oil, so as to improve the overall structural strength of the oil pipeline while reducing the overall weight of the oil pipeline, further improving the lightweight design of the powertrain.

[0013] In one implementation, an oil delivery pipe further includes an oil guide groove, the oil guide groove is used to receive cooling oil outputted from a second section, and the oil guide groove is used to guide the cooling oil to a gear or a bearing of the reducer.

[0014] Accordingly, an oil guide groove is provided at one end of a second section away from a first section along the flow direction of the cooling oil, that is, the cooling oil in a second section is guided to a gear or a bearing of the reducer through an oil guide groove, thereby forming an effect of increasing the extension length of an oil pipe along the flow direction of the cooling oil. By adding an oil guide groove to the oil outlet side of a second section, and guiding the cooling oil in a second section to a gear or a bearing of the reducer through an oil guide groove, the accuracy of an oil pipe in conveying cooling oil to a position to be lubricated in the powertrain can be further improved, thereby improving the conveying efficiency and effect of the cooling oil to the position to be lubricated or the position to be dissipated. At the same time, by increasing the extension length of an oil pipe along the flow direction of the cooling oil, an oil injection pipe in the powertrain can meet the conveying requirements of cooling oil under different working conditions, and can expand the use scope and application scenarios of an oil injection pipe, thereby improving the applicability of an oil injection pipe. In addition, while realizing the function of conveying cooling oil, the oil guide groove can reduce the weight of an oil pipe because it is a non-enclosed pipe structure, thereby further improving the lightweight design of the powertrain.

[0015] In one implementation, the slot opening of one oil guide slot is located above the slot bottom of another oil guide slot in the vertical direction.

[0016] In one implementation, the cross-sectional shape of an oil guide groove along the flow direction of the cooling oil is circular, and the inner diameter of the groove bottom of an oil guide groove is greater than or equal to the aperture of a second section.

[0017] Correspondingly, along the flow direction of the cooling oil, the cross-sectional shape of an oil guide groove is the same as the cross-sectional shape of a second section, and the inner diameter of the bottom of an oil guide groove is greater than or equal to the aperture of a second section. This can reduce the overall weight of an oil pipeline while further reducing the difficulty and requirements for preparing an oil pipeline, thereby further improving the preparation efficiency of an oil pipeline.

[0018] In one implementation, an extension direction of an oil guide groove is the same as an extension direction of at least one of a first section or a second section, an extension length of an oil guide groove is less than or equal to an extension length of a second section, and an extension length of an oil guide groove is greater than or equal to an extension length of a first section.

[0019] Accordingly, the central axis of an oil guide groove coincides with at least one of the axis of a first section or the axis of a second section, so that an oil guide groove extends along the flow direction of the cooling oil, ensuring that an oil guide groove can accurately and efficiently guide the cooling oil to a gear or a bearing of the reducer, so as to improve the lubrication effect of the cooling oil on the gear or the bearing. At the same time, when the central axis of an oil guide groove, the axis of a first section and the axis of a second section coincide at the same time, an oil pipeline as a whole is in a straight line extending along the flow direction of the cooling oil, which can further reduce the difficulty and requirements of preparing an oil pipeline and further improve the preparation efficiency of the powertrain. At the same time, since the fully enclosed pipe structure can form a containment effect on the cooling oil inside it, the extension length of an oil guide groove along the flow direction of the cooling oil is less than the extension length of a second section, which can extend the path length of the cooling oil contained by an oil pipeline, avoiding the excessive extension length of an oil guide groove causing the cooling oil to be exposed prematurely during the transportation process, and the undesirable phenomenon of cooling oil loss during the transportation process may occur.

[0020] In one implementation, at least one of a groove depth or a groove width of an oil guide groove is greater than or equal to half of a hole diameter of a second section.

[0021] Accordingly, along the circumference of a second section, the maximum size of the slot of an oil guide groove is less than or equal to half of the circumference of a second section, which can improve the containment effect of an oil guide groove on cooling oil, avoid the undesirable phenomenon that cooling oil may leak out from the slot of an oil guide groove, and reduce the loss of cooling oil during transportation. That is, by increasing the height of the groove wall of an oil guide groove in the vertical direction, the transportation efficiency and effect of an oil pipe on cooling oil can be further improved, so as to further improve the working efficiency and life of the power assembly.

[0022] In one implementation, an oil injection pipe includes another oil delivery pipe, and the extension direction of the other oil delivery pipe intersects with the extension direction of the one oil delivery pipe, wherein, along the direction of cooling oil flow, the other oil delivery pipe is used to receive cooling oil and to deliver cooling oil to a first section of the one oil delivery pipe.

[0023] Accordingly, along the flow direction of the cooling oil, a first section of an oil pipe is away from an opening of a second section and is connected to the outer peripheral wall of another oil pipe, so that the oil in the other oil pipe can be transported from a first section of an oil pipe away from an opening of a second section to an oil pipe, and respectively transported to a position to be lubricated or a position to be dissipated through a first section and a second section. At the same time, an oil pipe is connected to the outer peripheral wall of another oil pipe, and other oil pipes can be arranged in the extension length direction of the other oil pipe, so that an oil injection pipe can simultaneously transport cooling oil to multiple positions to be lubricated and multiple positions to be dissipated, while improving the lubrication and heat dissipation efficiency of an oil injection pipe on the powertrain, and can also reduce the structural dimensions of an oil injection pipe along the extension length direction of another oil pipe, simplifying the internal structural design of the powertrain.

[0024] In one implementation, the aperture of the other oil pipeline is larger than the aperture of a first section of the one oil pipeline.

[0025] Correspondingly, since another oil pipe may be used to simultaneously deliver cooling oil to multiple positions to be lubricated or positions to be dissipated in the powertrain, the flow rate of the cooling oil in the other oil pipe is greater than the flow rate of the cooling oil in one oil pipe, which can ensure that one oil injection pipe can deliver sufficient cooling oil to each position to be lubricated or position to be dissipated, so as to ensure the lubrication effect of each position to be lubricated and the heat dissipation cooling effect of each heat dissipation position, thereby further improving the working efficiency and life of the powertrain.

[0026] In one implementation, another oil pipeline is also used to connect a nozzle, and a nozzle is used to receive cooling oil through the other oil pipeline, wherein, along the flow direction of the cooling oil in the other oil pipeline, a nozzle is arranged adjacent to an oil pipeline, and the interval between a nozzle and an oil pipeline is greater than the aperture of the other oil pipeline.

[0027] Correspondingly, a nozzle is connected to one side of the oil outlet of the other branch oil pipeline of the other oil pipeline, and the cooling oil in the other oil pipeline is transported to a nozzle through the other branch oil pipeline, and can be transported to the position to be lubricated or the position to be dissipated in the power assembly through the nozzle. At the same time, along the flow direction of the cooling oil, a nozzle is connected to the outer peripheral wall of the other oil pipeline, and a nozzle is arranged at intervals on one side of the one oil pipeline along the extension direction of the other oil pipeline, which can lubricate or dissipate heat for functional structural devices at different positions to be lubricated or positions to be dissipated, further improving the cooling oil delivery efficiency and effect of an injection pipe. Along the extension direction of the other oil pipeline, the interval between a nozzle and an oil pipeline is greater than the aperture of the other oil pipeline, so as to avoid the reduction of the overall structural strength of an injection pipe due to the small spacing between a nozzle and an oil pipeline, thereby improving the working efficiency and reliability of an injection pipe.

[0028] In one implementation, the housing includes an oil delivery hole, an oil discharge port and an oil pump, the oil delivery hole is used to deliver cooling oil to an oil delivery pipe through another oil delivery pipe, the housing is used to accommodate the cooling oil output by an oil delivery pipe, the oil discharge port is used to discharge the cooling oil accommodated in the housing, and the oil pump is used to deliver the cooling oil discharged from an oil discharge port to the oil delivery hole through at least one of the internal oil channel or the external oil channel of the housing.

[0029] Correspondingly, another oil delivery pipe is fixed to the housing, and the opening at one end of the other oil delivery pipe is connected to an oil delivery hole opened in the housing, so that the cooling oil of the oil circuit relative to the outside of the housing can be delivered to the other oil delivery pipe through an oil delivery hole, so that the cooling oil can lubricate or dissipate heat for the functional structural devices in the power assembly. When the cooling oil completes the lubrication or heat dissipation of each functional structural device, the used cooling oil flows to the oil pool of the housing and is stored, so that the housing can achieve the effect of accommodating the cooling oil output by an oil delivery pipe, so that the cooling oil that has completed lubrication and heat dissipation can be circulated and avoid waste. An oil pump provides negative pressure to absorb the cooling oil contained in the housing, and sequentially delivers the cooling oil to a cooling oil coarse filter device, a heat exchanger, a cooling oil fine filter device and other functional devices to improve the cleanliness of the cooling oil and reduce the temperature of the cooling oil, so as to achieve the recycling effect of the cooling oil and further improve the working efficiency and life of the power assembly. When the cleanliness of the cooling oil is improved and the temperature is reduced, an oil pump can apply pressure to the cooling oil and can deliver the cooling oil from one oil delivery hole to another oil delivery pipe. At the same time, the pressure applied by an oil pump to the cooling oil can ensure the flow effect of the cooling oil in another oil pipeline and an oil pipeline, and can ensure that the cooling oil has sufficient power to be transported to the position to be lubricated or the position to be cooled.

[0030] In one implementation, the extension direction of a first segment is the same as the extension direction of a second segment, the axis of a first segment overlaps the axis of a second segment, and the extension length of a first segment is less than or equal to the extension length of a second segment.

[0031] Accordingly, when the axis of a first section coincides with the axis of a second section, the entire oil pipeline is in a straight line extending in the flow direction of the cooling oil, which can further reduce the difficulty and requirements of preparing an oil pipeline and further improve the preparation efficiency of the powertrain. Along the flow direction of the cooling oil, the extension length of a first section is less than the extension length of a second section. While ensuring that the cooling oil can be accurately delivered to the position to be lubricated or the position to be dissipated, the extension length of the first section with a relatively small aperture is reduced to reduce the limitation on the preparation of an oil pipeline due to an excessively large aspect ratio, which can further reduce the difficulty and requirements of preparing an oil pipeline.

[0032] In one implementation, a ratio of an extension length of a first section along a flow direction of the cooling oil to a hole diameter of the first section is less than or equal to 6.

[0033] Accordingly, by limiting the aspect ratio of a first section to be less than or equal to 6, the difficulty and requirements for preparing an entire oil pipeline can be reduced, thereby improving the efficiency of preparing an entire fuel injection pipe.

[0034] In one implementation, an aperture D1 of a first section and an aperture D2 of a second section satisfy the condition: D2 ≥ 2D1.

[0035] Correspondingly, by limiting the condition between the aperture D1 of a first section and the aperture D2 of a second section: D2≥2D1, the aperture of a second section is made sufficiently large relative to the aperture of a first section, thereby further reducing the difficulty and requirements of the overall preparation of an oil pipeline, thereby further improving the preparation efficiency and effect of an oil pipeline.

[0036] In the second aspect, the present application also provides an oil injection pipe with multiple sections of variable apertures, the oil injection pipe comprising an oil delivery pipe and another oil delivery pipe, the extension direction of the other oil delivery pipe intersecting with the extension direction of the one oil delivery pipe, the one oil delivery pipe comprising an integrally formed first section, a second section and an oil guide groove, the aperture of the first section being smaller than the aperture of the second section, wherein, along the direction of cooling oil flow, the other oil delivery pipe is used to receive cooling oil and to deliver cooling oil to a first section of an oil delivery pipe, a first section is used to deliver cooling oil to a second section, a second section is used to output cooling oil, an oil guide groove is used to receive cooling oil output by a second section, an oil guide groove is used to guide cooling oil to a gear or a bearing of a reducer, the extension direction of a first section and a second section are the same as the extension direction of an oil guide groove, and the extension length of a first section is less than or equal to the extension length of at least one of a second section or an oil guide groove.

[0037] An oil injection pipe provided in the present application transports cooling oil to an oil pipe through another oil pipe, and transports the cooling oil to various positions to be lubricated or heat dissipated in the powertrain through an oil pipe, so that the cooling oil can lubricate or dissipate heat to functional structural devices such as a gear, a bearing or a stator winding end of a motor in the powertrain, thereby improving the working efficiency and life of the powertrain.

[0038] In a third aspect, the present application also provides a vehicle, comprising wheels and a powertrain provided by any of the above-mentioned implementations or a fuel injection pipe provided by any of the above-mentioned implementations, wherein the powertrain is used to drive the wheels.

[0039] The powertrain of the vehicle provided in the present application is connected to the wheels in a transmission manner, so that the power output by the powertrain is transmitted to the wheels, so as to achieve the effect of driving the wheels to rotate and then driving the vehicle to travel. The vehicle of the present application is equipped with a powertrain in any of the above-mentioned implementations, which can improve the working performance and life of the vehicle of the present application. Or, the vehicle of the present application is equipped with a fuel injection pipe in any of the above-mentioned implementations, which can improve the working efficiency and life of the vehicle. That is, because the powertrain in any of the above-mentioned implementations or the fuel injection pipe in any of the above-mentioned implementations is used, the vehicle of the present application has all the possible beneficial effects of the powertrain provided by any of the above-mentioned implementations or the fuel injection pipe provided by any of the above-mentioned implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A schematic diagram of a working scenario of a powertrain provided in an embodiment of the present application;

[0042] Figure 2 A schematic diagram of the planar structure of a powertrain provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of the working principle of active lubrication of internal cooling oil of a powertrain provided in an embodiment of the present application;

[0044] Figure 4 This is a schematic diagram of the appearance structure of the powertrain provided in the embodiment of the present application with some structures hidden;

[0045] Figure 5 This is a schematic diagram of the appearance structure of the powertrain provided in the embodiment of the present application with some structures hidden;

[0046] Figure 6 A schematic diagram of the appearance structure of an oil delivery pipe of an oil injection pipe provided in an embodiment of the present application;

[0047] Figure 7 A schematic diagram of the planar structure of an oil delivery pipe of an oil injection pipe provided in an embodiment of the present application;

[0048] Figure 8 A schematic diagram of the planar structure of an oil delivery pipe of an oil injection pipe provided in an embodiment of the present application;

[0049] Fig. 9 A schematic diagram of the cross-sectional structure of an oil delivery pipe of an oil injection pipe provided in an embodiment of the present application;

[0050] Fig.10 A schematic diagram of the appearance structure of a fuel injection pipe provided in an embodiment of the present application;

[0051] Fig.11 A schematic diagram of the appearance structure of a fuel injection pipe provided in an embodiment of the present application;

[0052] Fig.12 A schematic diagram of the partial cross-sectional structure of a fuel injection pipe provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection claimed in the present application.

[0054] The present application provides a powertrain with a multi-section variable aperture oil injection pipe, the powertrain includes a housing and an oil injection pipe, the housing is used to accommodate at least one of the reducer or motor of the powertrain and an oil injection pipe, the oil injection pipe includes an oil delivery pipe, the oil delivery pipe includes a first section and a second section formed in one piece, the aperture of the first section is smaller than the aperture of the second section, wherein, along the flow direction of the cooling oil, the first section is used to receive the cooling oil and to deliver the cooling oil to the second section, and the second section is used to output the cooling oil to lubricate a gear or a bearing of the reducer or to dissipate heat from the stator winding end of the motor. The multi-section variable aperture oil injection pipe carried by the powertrain of the present application is not limited by the aspect ratio during the preparation process, can meet the transportation requirements of the cooling oil under various working conditions and improve the delivery efficiency and accuracy of the cooling oil, so as to improve the working efficiency and life of the powertrain. In addition, the multi-section variable aperture oil injection pipe carried by the powertrain of the present application can reduce the difficulty and requirements of preparation, thereby improving the preparation efficiency of the powertrain.

[0055] The present application provides a fuel injection pipe with multiple sections of variable apertures, the fuel injection pipe includes an fuel delivery pipe and another fuel delivery pipe, the extension direction of the other fuel delivery pipe intersects with the extension direction of the one fuel delivery pipe, the one fuel delivery pipe includes an integrally formed first section, a second section and an oil guide groove, the aperture of the first section is smaller than the aperture of the second section, wherein, along the direction of cooling oil flow, the other fuel delivery pipe is used to receive cooling oil and to deliver cooling oil to a first section of the one fuel delivery pipe, the first section is used to deliver cooling oil to a second section, the second section is used to output cooling oil, an oil guide groove is used to receive cooling oil output by the second section, and the oil guide groove is used to guide cooling oil to a gear or a bearing of a reducer, the extension direction of the first section and the extension direction of the second section are the same as the extension direction of the oil guide groove, and the extension length of the first section is less than or equal to the extension length of at least one of the second section or the oil guide groove. The fuel injection pipe of the present application can reduce the difficulty and requirements of preparing a fuel delivery pipe, and can achieve a lightweight design of the fuel injection pipe.

[0056] The present application provides a vehicle, the vehicle comprising wheels and a powertrain provided by any of the above implementations or a fuel injection pipe provided by any of the above implementations, the powertrain being used to drive the wheels. The vehicle of the present application is equipped with a powertrain provided by any of the above implementations or a fuel injection pipe provided by any of the above implementations, which can improve the working efficiency and life of the vehicle of the present application.

[0057] The present application provides a vehicle, the vehicle comprising wheels, a power battery and a power assembly, Figure 1 The powertrain of the present application is shown as powertrain 1000. The power battery is electrically connected to each functional structural component inside the vehicle, and the power battery can provide power for each functional structural component inside the vehicle to operate normally. The powertrain 1000 is used to receive the electrical energy provided by the power battery and to provide power to drive the wheels of the vehicle.

[0058] The wheels are rotatably connected to the body of the vehicle, and each wheel rotates to drive the frame of the vehicle to travel. The powertrain 1000 is fixedly connected to the body of the vehicle and is drivingly connected to the wheels of the vehicle. Exemplarily, the power battery supplies power to the powertrain 1000, and the powertrain 1000 receives electrical energy and outputs power to the wheel ends to drive the wheels to rotate. It can be understood that the powertrain 1000 of the vehicle is connected to the wheels through a speed reducer, so that the power output of the motor in the powertrain 1000 is transmitted to the speed reducer, and then transmitted to the wheels through the speed reducer, so as to achieve the effect of driving the wheels to rotate and then driving the vehicle to travel.

[0059] See also Figure 1 , Figure 1Schematic diagram of the working scene of the powertrain 1000 provided in the embodiment of the present application. The powertrain 1000 includes a motor 1001, a reducer 1002 and a housing 1003, and at least one of the motor 1001 and the reducer 1002 is accommodated in the housing 1003. That is, the motor 1001 and the reducer 1002 may be but are not limited to being fully accommodated in the housing 1003, or only the motor 1001 may be but are not limited to being accommodated in the housing 1003, or only the reducer 1002 may be but are not limited to being accommodated in the housing 1003. Figure 1 In the illustrated embodiment, the motor 1001 and the reducer 1002 are adjacently arranged in the housing 1003 along the axial direction of the motor 1001 .

[0060] It can be understood that the various functional structural devices of the power assembly 1000 are housed and fixed in the housing 1003, so that the housing 1003 can support and fix the various functional structural devices inside it, so as to ensure that the various functional structural devices inside the power assembly 1000 can work normally, thereby ensuring the working performance of the power assembly 1000. At the same time, the housing 1003 can protect the various functional structural devices inside it, so as to prevent foreign objects such as dust and impurities in the external environment from invading the interior of the housing 1003 and possibly causing damage to the various functional structural devices inside, thereby improving the working performance and life of the power assembly 1000.

[0061] The motor 1001 is connected to the reducer 1002. The motor 1001 is used to generate driving torque and is used as a power source of the power assembly 1000 to output power. The motor 1001 transmits the output power to the wheels through the reducer 1002 to drive the electric vehicle to travel.

[0062] Specifically, the motor 1001 includes a stator 1006, a rotor 1007 and a motor shaft 1008. The stator 1006 is coaxially sleeved on the periphery of the rotor 1007 and fixed relative to the housing 1003 of the motor 1001. The motor shaft 1008 of the motor 1001 is coaxially fixed to the rotor 1007. The rotor 1007 rotates around its own axis and synchronously drives the motor shaft 1008 to rotate, so as to output power through the motor shaft 1008.

[0063] Exemplarily, the stator 1006 includes a stator core 1006a and a stator winding 1006b, wherein the stator winding 1006b is wound around the stator core 1006a. When an alternating current is passed through the stator winding 1006b, a rotating stator magnetic field is generated in the stator core 1006a to drive the rotor 1007 to rotate, and synchronously drive the motor shaft 1008 to rotate around its own axis, thereby achieving the effect of the motor 1001 outputting power to the outside.

[0064] Exemplarily, the rotor 1007 includes a rotor core and a rotor winding, the rotor winding is wound around the rotor core, the rotor winding cuts the rotating stator magnetic field and generates an induced electromotive force and current. The rotor 1007 works together with the stator 1006 to form an electromagnetic torque to drive the rotor 1007 to rotate relative to the stator 1006, thereby driving the motor shaft 1008 to rotate around its own axis and output power to the outside.

[0065] exist Figure 1 In the embodiment shown, the reducer 1002 includes a plurality of gears 1004 and a plurality of rotating shafts 1005, and the plurality of rotating shafts 1005 are arranged in parallel and at intervals. The plurality of gears 1004 are used to realize the transmission connection between the plurality of rotating shafts 1005, so as to transmit the power input by the motor 1001 and output it to the wheel end.

[0066] In one embodiment, the plurality of rotating shafts 1005 include an input shaft 1005a, an intermediate shaft 1005b and an output shaft 1005c, and the input shaft 1005a, the intermediate shaft 1005b and the output shaft 1005c are arranged in parallel and at intervals. The input shaft 1005a is used for transmission connection to the motor shaft 1008 of the motor 1001, and the intermediate shaft 1005b is used for transmission connection to the output shaft 1005c through at least one gear 1004a.

[0067] In one embodiment, at least one gear 1004a is coaxially sleeved on the periphery of the input shaft 1005a, the intermediate shaft 1005b and the output shaft 1005c. The gears 1004a sleeved on each rotating shaft mesh with each other to achieve the effect of the intermediate shaft 1005b being connected to the input shaft 1005a and the output shaft 1005c. The motor 1001 is used to output power outward. Since the motor shaft 1008 is coaxially driven with the input shaft 1005a of the reducer 1002, when the motor shaft 1008 rotates around its own axis, it will synchronously drive the input shaft 1005a to rotate coaxially, thereby achieving the effect of inputting power into the reducer 1002.

[0068] That is, the reducer 1002 is arranged adjacent to one side of the motor 1001 along the axial direction of the motor 1001, and the axis of the motor shaft 1008 coincides with the axis of the input shaft 1005a, so that the input shaft 1005a of the reducer 1002 and the motor shaft 1008 of the motor 1001 can be coaxially connected, and then the motor shaft 1008 and the input shaft 1005a cooperate with each other to achieve the effect of the motor 1001 inputting power into the reducer 1002.

[0069] The output shaft 1005c of the reducer 1002 can but is not limited to rotating coaxially with the wheel, so as to transmit the power input by the input shaft 1005a out of the reducer 1002 and to the wheel end, thereby achieving the effect of the motor 1001 driving the wheel to rotate through the reducer 1002.

[0070] The intermediate shaft 1005b is arranged parallel to and at intervals between the input shaft 1005a and the output shaft 1005c, so that the intermediate shaft 1005b realizes a transmission connection between the input shaft 1005a and the output shaft 1005c, and can transmit the power input into the reducer 1002 by the motor 1001 through the input shaft 1005a to the output shaft 1005c, and transmit it outward through the output shaft 1005c, thereby realizing the effect of the reducer 1002 transmitting the power of the motor 1001 and outputting it.

[0071] It should be noted that this application Figure 1 The embodiment shown is only an example of a possible arrangement and spacing of the input shaft 1005a, the intermediate shaft 1005b and the output shaft 1005c in the reducer 1002, but the arrangement and spacing of the input shaft 1005a, the intermediate shaft 1005b and the output shaft 1005c in the reducer 1002 are not limited to this. In other embodiments of the present application, the arrangement and spacing of the input shaft 1005a, the intermediate shaft 1005b and the output shaft 1005c in the reducer 1002, and the structural dimensions of the gears sleeved on the periphery of each rotating shaft can be adjusted according to actual design requirements, and the embodiment of the present application does not specifically limit this.

[0072] At the same time, Figure 1 In the illustrated embodiment, only the possible functional structures in the powertrain 1000 provided in the embodiment of the present application and the possible structural shapes, sizes, and arrangement positions of each functional structure are used as examples for exemplary introduction, but the functional structural devices in the powertrain 1000 provided in the embodiment of the present application and the structural shapes, sizes, and arrangement positions of each functional structural device are not limited to this. In other embodiments of the present application, the functional structural devices in the powertrain 1000 and the structural shapes, sizes, and arrangement positions of each functional structural device can be adjusted according to actual design requirements and application scenarios, and the embodiment of the present application does not specifically limit this.

[0073] In one embodiment, the motor 1001 and the reducer 1002 of the power assembly 1000 provided in the embodiment of the present application may be, but not limited to, a separate type, or may be, but not limited to, an integrated type.

[0074] In one embodiment, the power output by the powertrain 1000 provided in the embodiment of the present application is only provided by the motor 1001. In this case, the powertrain 1000 of the present application can output power as a pure electric system.

[0075] See also Figure 2 , Figure 2 This is a schematic diagram of the planar structure of the powertrain 1000 provided in an embodiment of the present application. Figure 2In the illustrated embodiment, the power assembly 1000 includes a cooling oil coarse filter device 10091, an oil pump 10092, a heat exchanger 10093, a cooling oil fine filter device 10094, and an oil pool 10095. In the flow direction of the cooling oil, the oil pool 10095, the cooling oil coarse filter device 10091, the heat exchanger 10093, the oil pump 10092, and the cooling oil fine filter device 10094 are interconnected and work in coordination with each other to realize functions such as oil supply, oil return, and cooling oil circulation within the power assembly 1000.

[0076] In one embodiment, the oil pool 10095 can be, but is not limited to, connected to the receiving chambers of the motor 1001, the reducer 1002 and other functional structural devices in the housing 1003. In one embodiment, the cooling oil delivery path arranged inside the power assembly 1000 can be used to deliver cooling oil to the motor 1001, the reducer 1002 and other functional structural devices to meet the lubrication and heat dissipation requirements of the various functional structural devices in the power assembly 1000, thereby ensuring the working performance and life of the power assembly 1000. In one embodiment, after the cooling oil has completed the heat dissipation or lubrication function of the motor 1001, the reducer 1002 and other functional structural devices, the used cooling oil is returned to the oil pool 10095. Alternatively, the oil pool 10095 can also be used to store oil when the external oil circuit is used to fill the housing 1003 of the power assembly 1000 with oil.

[0077] In one embodiment, the cooling oil coarse filter device 10091 is connected between the oil pump 10092 and the oil pool 10095. When the oil pump 10092 provides negative pressure and absorbs the cooling oil in the oil pool 10095, the cooling oil in the oil pool 10095 is firstly transported to the cooling oil coarse filter device 10091 for coarse filtration, so as to filter out relatively large impurities and abrasive particles mixed in the cooling oil, thereby improving the cleanliness of the cooling oil and preventing the impurities, abrasive particles and other foreign matters mixed in the cooling oil from causing damage to the oil pump 10092, thereby improving the working performance and life of the oil pump 10092.

[0078] In one embodiment, the oil pump 10092 draws cooling oil from the oil pool 10095 and delivers it to the heat exchanger 10093. Figure 2 In the illustrated embodiment, the heat exchanger 10093 is used to achieve heat exchange for the cooling oil in the power assembly 1000. After being transported to the heat exchanger 10093, the cooling oil carrying heat output from other structural devices in the power assembly 1000 is heat exchanged by the heat exchanger 10093 and the cooling oil with a relatively low temperature is output to the outside, so that the cooling oil can be used to achieve the effect of heat dissipation and cooling of the motor 1001 and other functional structural devices in the power assembly 1000, ensuring that the power assembly 1000 is at a suitable operating temperature, and improving the working performance and life of the power assembly 1000.

[0079] In one embodiment, the heat exchanger 10093 can be, but is not limited to, connected to the receiving cavities of the motor 1001, the reducer 1002 and other work structure devices respectively, so that the heat exchanger 10093 can provide cooling oil to the motor 1001, the reducer 1002 and other work structure devices respectively for lubrication or heat dissipation of the motor 1001, the reducer 1002 and other work structure devices, thereby enabling the motor 1001, the reducer 1002 and other work structure devices to operate in a suitable temperature environment, further improving the working performance and life of the power assembly 1000.

[0080] In one embodiment, along the flow direction of the cooling oil, a cooling oil fine filter device 10094 is also arranged on one side of the oil outlet of the heat exchanger 10093. That is, the cooling oil fine filter device 10094 is used to further filter impurities, abrasive particles and other foreign matter with relatively small volume, structural size, etc. in the cooling oil, so as to further improve the cleanliness of the cooling oil.

[0081] In one embodiment, a plurality of oil pipelines are arranged in the power assembly 1000 , and the plurality of oil pipelines are connected between various functional structural devices inside the power assembly 1000 to realize the cooling oil transportation function inside the power assembly 1000 .

[0082] For an example, please combine Figure 2 See also Figure 3 , Figure 3 This is a schematic diagram of the working principle of active lubrication of the internal cooling oil of the powertrain 1000 provided in the embodiment of the present application. Figure 2 and Figure 3 In the illustrated embodiment, the power assembly 1000 uses active lubrication to lubricate or dissipate heat for the motor 1001, the reducer 1002 and other work structure devices of the power assembly 1000. Exemplarily, the active lubrication can be understood as the oil pump 10092 sucking the cooling oil in the oil pool 10095, and can be, but not limited to, sequentially transporting the cooling oil to the heat exchanger 10093 for heat exchange and the cooling oil fine filter device 10094 for fine filtration. Then, the motor 1001, the reducer 1002 and other work structure devices of the power assembly 1000 are respectively transported for lubrication or heat dissipation.

[0083] In this application specification, the positions corresponding to the motor 1001, reducer 1002 and other work structure devices of the power assembly 1000 that need to be lubricated with cooling oil are briefly described as positions to be lubricated. The positions corresponding to the motor 1001, reducer 1002 and other work structure devices of the power assembly 1000 that need to be cooled and dissipated are briefly described as positions to be dissipated.

[0084] In one embodiment, a large amount of heat will be generated when current is passed through the stator winding 1006b in the motor 1001, and the windings at the ends of the stator winding 1006b are complex and dense, resulting in high heat generation at the ends of the stator winding. Figure 2 In the illustrated embodiment, the end of the stator winding 1006b can be understood as a portion of the structure where the stator winding 1006b extends out of the stator core 1006a along the axial direction of the motor 1001. In addition, in this application specification, the end of the stator winding 1006b is simply referred to as the stator winding end.

[0085] like Figure 2 As shown, the oil pump 10092 draws cooling oil from the oil pool 10095 and delivers the cooling oil to the stator winding end through the oil delivery pipe. The cooling oil can dissipate heat from the stator winding end to reduce the temperature of the stator winding end, so that the motor 1001 can work at a suitable temperature, thereby improving the working performance and life of the motor 1001.

[0086] In one embodiment, two adjacent gears 1004a in the reducer 1002 are meshed to transmit power, and there will be a large friction between the two, which may reduce the working performance and life of the reducer 1002. Figure 2 and Figure 3 In the illustrated embodiment, the oil pump 10092 draws cooling oil from the oil pool 10095 and delivers the cooling oil to at least one gear 1004a via an oil pipe to lubricate one gear 1004a, thereby reducing the friction existing when two adjacent gears 1004a mesh with each other, thereby improving the transmission efficiency of the reducer 1002.

[0087] At the same time, in one embodiment, when the cooling oil lubricates a gear 1004a, multiple gears 1004 mesh with each other for transmission, and the cooling oil on the outer circumference of a gear 1004a will be carried by the outer circumferences of multiple gears 1004 in the reducer 1002, thereby forming an effect of lubricating the multiple gears 1004 of the reducer 1002 with the cooling oil, thereby improving the working performance and life of the reducer 1002.

[0088] In one embodiment, a plurality of bearings 10096 are provided in the motor 1001 and the reducer 1002. The inner ring of each bearing 10096 is sleeved and fixed to the periphery of the motor shaft 1008, or fixed to the periphery of each rotating shaft 1005, and the outer ring of each bearing 10096 is fixed to the housing 1003. By providing a plurality of bearings 10096, it is possible to ensure that the motor shaft 1008 or each rotating shaft 1005 can stably rotate around its own axis while also providing a support effect for the motor shaft 1008 or each rotating shaft 1005, and the motor shaft 1008 or each rotating shaft 1005 is fixed relative to the housing 1003 for stable operation.

[0089] The inner ring of each bearing 10096 rotates relative to the outer ring along with the motor shaft 1008 or the rotating shaft 1005, and there is a certain amount of friction between the two. Figure 2 and Figure 3 In the illustrated embodiment, the oil pump 10092 draws cooling oil from the oil pool 10095 and delivers the cooling oil to a bearing 10096 through an oil delivery pipe to lubricate the bearing 10096. By delivering the cooling oil to the bearing 10096, the bearing 10096 can be lubricated to improve the working performance and life of the bearing 10096.

[0090] It should be noted that in Figure 2 In the illustrated embodiment, only one possible oil delivery path of cooling oil in the powertrain 1000 is used as an example for illustrative description, but the oil delivery path for cooling oil in the powertrain 1000 of the present application is not limited to this. Figure 2 In the illustrated embodiment, the cooling oil is used only for dissipating heat from the stator winding end and lubricating a gear 1004a or a bearing 10096 as an example, but the cooling oil is not limited to lubricating only the stator winding end of the motor 1001, a gear 1004a of the reducer 1002, or any bearing 10096 in the motor 1001 or the reducer 1002.

[0091] The cooling oil can also be used, but not limited to, to dissipate heat for the stator core 1006a and the rotor 1007 of the motor 1001. The cooling oil can also be used, but not limited to, to lubricate multiple bearings 10096 or multiple gears 1004 at the same time. In the present application specification, one bearing 10096 or one gear 1004a is used as an example. That is, in other embodiments of the present application, the flow path of the cooling oil in the powertrain 1000 can be adjusted according to actual design requirements, application scenarios, and functional requirements to be met, etc., and the present application embodiment does not specifically limit this.

[0092] At the same time, Figure 2 In the illustrated embodiment, only the functional device or functional structural component for conveying cooling oil in the power assembly 1000 of the present application is used as an example for illustrative introduction, but the layout position and structural size characteristics of each functional structural device in the power assembly 1000 are not limited to this.

[0093] Please also read Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the appearance structure of the powertrain 1000 provided in the embodiment of the present application with some structures hidden. Figure 5This is a schematic diagram of the appearance structure of the powertrain 1000 provided in the embodiment of the present application with some structures hidden. In order to clearly illustrate the possible layout of an injection pipe 10 relative to a position to be lubricated, Figure 4 and Figure 5 The functional structural devices of the power assembly 1000, such as the motor 1001, the reducer 1002, the oil pump 10092, and other oil pipelines in the oil delivery path, are omitted, and only the second section 112 of an injection pipe 10 directed toward two adjacent meshing gears 1004a is used as an example for exemplary introduction.

[0094] The power assembly 1000 also includes an oil injection pipe 10, which is accommodated in the housing 1003 of the power assembly 1000. The oil injection pipe 10 is used to transport cooling oil to a gear 1004a or a bearing 10096 of the reducer 1002 for lubrication or to dissipate heat from the stator winding end of the motor 1001.

[0095] Specifically, one oil injection pipe 10 is connected to the oil pipeline arranged in the housing 1003, and one oil injection pipe 10 corresponds to one position to be lubricated or one position to be cooled, so as to deliver the cooling oil sucked by the oil pump 10092 and delivered to the oil pipeline to each position to be lubricated or each position to be cooled. The position to be lubricated can be understood as a gear 1004a or a bearing 10096, and the position to be cooled can be understood as the stator winding end of the motor 1001.

[0096] It can be understood that the cooling oil in the oil pool 10095 is pressurized by the oil pump 10092 and then pressed into the oil pipeline arranged in the power assembly 1000, and can be but is not limited to being transported to an injection pipe 10 through the oil pipeline, so as to be transported to each position to be lubricated or each position to be cooled through an injection pipe 10.

[0097] Please combine Figure 4 and Figure 5 See also Figure 6 , Figure 6 The schematic diagram of the appearance structure of an oil delivery pipe 11 of an oil injection pipe 10 provided in the embodiment of the present application. Figure 4-Figure 6 In the illustrated embodiment, an oil injection pipe 10 includes an oil delivery pipe 11, and the oil delivery pipe 11 includes a first section 111 and a second section 112 that are connected. In the flow direction of the cooling oil, the first section 111 is used to receive the cooling oil and to deliver the cooling oil to the second section 112, and the second section 112 is used to output the cooling oil to lubricate a gear 1004a or a bearing 10096 of the reducer 1002 or to dissipate heat from the stator winding end of the motor 1001.

[0098] Specifically, along the flow direction of the cooling oil, the cooling oil flows into an oil delivery pipe 11 from an opening 111a of a first section 111 away from a second section 112, so that the cooling oil flowing into a first section 111 can be transported to a second section 112. Along the flow direction of the cooling oil, the cooling oil in a second section 112 flows out from an opening 112b of a second section 112 away from a first section 111.

[0099] That is, through the cooperation of a first section 111 and a second section 112, the function of transporting cooling oil by an oil pipe 11 can be realized, and then the cooling oil can be transported to various positions to be lubricated or cooled in the power assembly 1000 through an oil pipe 11.

[0100] Among them, along the flow direction of the cooling oil, an opening 112b of a second section 112 away from a first section 111 can be but is not limited to being directed toward any one of a gear 1004a, a bearing 10096 or a stator winding end, so that the cooling oil in an oil pipe 11 can be transported to the outer peripheral surface of a gear 1004a or a bearing 10096 for lubrication, or the cooling oil in an oil pipe 11 can be transported to the outer peripheral surface of the stator winding end for heat dissipation.

[0101] It can be understood that an oil pipe 11 extends along the flow direction of the cooling oil, so that the cooling oil transported through the oil pipe 11 can be accurately and effectively transported to each position to be lubricated or each position to be cooled in the power assembly 1000, so as to ensure the lubrication and cooling effect of each functional device in the power assembly 1000, thereby improving the working efficiency and life of the power assembly 1000.

[0102] At the same time, along the flow direction of the cooling oil, a second section 112 is away from an opening 112b of the first section 111 toward a gear 1004a of the reducer 1002, a bearing 10096 or the stator winding end of the motor 1001, so that the cooling oil in an oil pipe 11 can be transported to the outer circumference of a gear 1004a, a bearing 10096 or the stator winding end, so as to achieve a lubrication effect on a gear 1004a or a bearing 10096, or achieve a heat dissipation and cooling effect on the stator winding end, thereby improving the working performance and life of the reducer 1002 or the motor 1001.

[0103] exist Figure 6 In the illustrated embodiment, a first section 111 and a second section 112 are integrally formed, and an aperture D1 of a first section 111 is smaller than an aperture D2 of a second section 112 .

[0104] Generally, the preparation of an oil pipeline may be limited by the length-to-diameter ratio, which may increase the difficulty of preparing the oil pipeline. When an oil pipeline is limited by the length-to-diameter ratio and the extension length is insufficient, it will not be able to meet the transportation requirements of the cooling oil under various working conditions. For example, when an injection pipe is affected by the layout position of the oil pipeline in the housing and is far away from a gear, a bearing or the end of the stator winding, if the extension length of an oil pipeline is insufficient, the cooling oil may not be accurately delivered to the position to be lubricated or the position to be dissipated. For another example, when the oil pump does not pressurize the cooling oil enough or the cooling oil is in a low-temperature condition, if an oil pipeline is limited by the length-to-diameter ratio and the extension length is insufficient, the cooling oil may also be unable to be accurately delivered to the position to be lubricated or the position to be dissipated, resulting in low internal lubrication and heat dissipation efficiency of the powertrain.

[0105] An oil pipe 11 in the power assembly 1000 of the present application is manufactured using an integrated molding process, and the aperture in the oil pipe 11 is designed in sections, that is, the aperture of each section in the oil pipe 11 increases successively along the flow direction of the cooling oil, thereby reducing the manufacturing difficulty and precision requirements when the aspect ratio of the oil pipe 11 is too large.

[0106] That is, the aperture of an oil pipe 11 changes in sections, and the aperture of an oil pipe 11 increases in sections along the flow direction of the cooling oil. This can improve the manufacturing accuracy and requirements of an oil pipe 11 while also increasing the extension length of an oil pipe 11 along the flow direction of the cooling oil, thereby meeting the long-distance oil delivery requirements between an injection pipe 10 and various positions to be lubricated or to be dissipated in the powertrain 1000.

[0107] At the same time, the aperture in an oil pipe 11 is increased in sections along the flow direction of the cooling oil, so that an oil pipe 11 can break through the aspect ratio limitation during preparation and increase the extension length of the oil pipe 11, so that when the cooling oil is in low temperature conditions or the pressure is low, the cooling oil can be transported to various positions to be lubricated or heat dissipated in the power assembly 1000, thereby ensuring the lubrication efficiency of a gear 1004a or a bearing 10096 of the reducer 1002, or the heat dissipation efficiency of the stator winding end of the motor 1001, thereby improving the working efficiency and life of the power assembly 1000.

[0108] Because the powertrain 1000 of the present application is equipped with a fuel injection pipe 10 in any of the above-mentioned embodiments, the powertrain 1000 provided in the embodiment of the present application has all the possible beneficial effects of a fuel injection pipe 10 in any of the above-mentioned embodiments.

[0109] Since the vehicle of the present application uses the powertrain 1000 in any of the above embodiments or the fuel injection pipe in any of the above embodiments, the vehicle of the present application has all possible beneficial effects of the powertrain 1000 provided by any of the above embodiments or the fuel injection pipe provided by any of the above embodiments.

[0110] In one embodiment, an oil pipeline 11 is an injection molded part. The oil pipeline 11 is prepared by injection molding process, so that the oil pipeline 11 is formed in one piece, which reduces the difficulty of preparing the oil pipeline 11 and improves the preparation efficiency of the oil pipeline 11, thereby improving the overall preparation efficiency of the powertrain 1000.

[0111] It is understandable that the material of the injection molded part is usually but not limited to rubber or plastic with a relatively light weight. Therefore, preparing an oil delivery pipe 11 through the injection molding process can reduce the weight of the oil delivery pipe 11, thereby reducing the overall weight of the power assembly 1000 to meet the lightweight design requirements of the power assembly 1000. That is, an oil delivery pipe 11 is integrally formed through the injection molding process, so that the oil delivery pipe 11 can meet the transportation requirements of the cooling oil under various working conditions and also take into account the lightweight design requirements of the power assembly 1000.

[0112] In one embodiment, the extension direction of a first section 111 is the same as the extension direction of a second section 112, and the axis of a first section 111 overlaps with the axis of a second section 112. It can be understood that when the axis of a first section 111 coincides with the axis of a second section 112 at the same time, the entire oil delivery pipe 11 is in a straight line extending along the flow direction of the cooling oil, which can further reduce the difficulty and requirements of preparing the oil delivery pipe 11, and further improve the preparation efficiency of the power assembly 1000.

[0113] In one embodiment, an extension length L1 of a first segment 111 is less than or equal to an extension length L2 of a second segment 112 .

[0114] Along the flow direction of the cooling oil, the extension length L1 of a first section 111 is less than the extension length L2 of a second section 112. While ensuring that the cooling oil can be accurately delivered to the position to be lubricated or the position to be dissipated, by reducing the extension length L1 of a first section 111 with a relatively small aperture, the limitation on the preparation of an oil pipeline 11 due to the excessive length-to-diameter ratio can be reduced, and the difficulty and requirements for the preparation of an oil pipeline 11 can be further reduced. Among them, the length-to-diameter ratio of a first section 111 in an oil pipeline 11 described in the present application specification can be understood as the ratio between the extension length L1 of a first section 111 and its own aperture D1 along the flow direction of the cooling oil.

[0115] In one embodiment, along the flow direction of the cooling oil, the ratio of the extension length L1 of a first section 111 to the aperture D1 of a first section 111 is less than or equal to 6, that is, L1 / D1≤6. By limiting the aspect ratio of a first section 111 to be less than or equal to 6, the difficulty and requirements of the overall preparation of an oil delivery pipe 11 can be reduced, thereby improving the overall preparation efficiency of an oil injection pipe 10.

[0116] In one embodiment, the condition D2≥2D1 is satisfied between the aperture D1 of a first section 111 and the aperture D2 of a second section 112. By limiting the condition D2≥2D1 between the aperture D1 of a first section 111 and the aperture D2 of a second section 112, the aperture D2 of a second section 112 is sufficiently large relative to the aperture D1 of a first section 111, and the difficulty and requirements of the overall preparation of an oil pipeline 11 are further reduced, so as to further improve the preparation efficiency and effect of an oil pipeline 11.

[0117] In one embodiment, an oil delivery pipe 11 includes a connecting section 113, and along the flow direction of the cooling oil, the connecting section 113 is used to connect a first section 111 and a second section 112. Specifically, along the flow direction of the cooling oil, the connecting section 113 is arranged between a first section 111 and a second section 112, and openings at opposite ends of the connecting section 113 are respectively connected to a first section 111 and a second section 112.

[0118] It can be understood that, along the flow direction of the cooling oil, a connecting section 113 is located between a first section 111 and a second section 112, and two openings opposite to each other of a connecting section 113 are respectively connected to a first section 111 and a second section 112, so that a connecting section 113 can achieve the effect of connecting a first section 111 and a second section 112, and then can transport the cooling oil in a first section 111 to a second section 112, so as to transport the cooling oil to a gear 1004a, a bearing 10096 or an end of a stator winding.

[0119] In one embodiment, the aperture of at least one of a connecting section 113, a first section 111 or a second section 112 gradually increases along the flow direction of the cooling oil. Figure 6 In the embodiment shown, the aperture D3 of a connecting section 113 gradually increases along the flow direction of the cooling oil. The aperture D1 of a first section 111 is smaller than the minimum aperture of a connecting section 113 , and the aperture D2 of a second section 112 is larger than the maximum aperture of a connecting section 113 .

[0120] In other words, if Figure 6As shown, along the flow direction of the cooling oil, a connecting section 113 is connected between a first section 111 and a second section 112, and an opening of the connecting section 113 toward a first section 111 is connected to a first section 111, and an opening of the connecting section 113 toward a second section 112 is connected to a second section 112. The aperture of the opening of the connecting section 113 toward a first section 111 is larger than the aperture D1 of the first section 111, and the aperture of the opening of the connecting section 113 toward a second section 112 is smaller than the aperture D2 of the second section 112.

[0121] It can be understood that the aperture D3 of a connecting section 113 gradually increases along the flow direction of the cooling oil, that is, a connecting section 113 is constructed as a chamfered structure between a first section 111 and a second section 112, and the inner diameter of the chamfered structure gradually increases along the flow direction of the cooling oil, which can further reduce the difficulty of preparing an oil pipeline 11 and improve the preparation efficiency and effect of an oil pipeline 11. In addition, the aperture of at least one section of an oil pipeline 11 gradually increases along the flow direction of the cooling oil, which can further reduce the difficulty and requirements of preparing an oil pipeline 11.

[0122] It should be noted that in Figure 6 In the embodiment shown, the aperture D3 of a connecting section 113 is gradually increased along the flow direction of the cooling oil, but the aperture change of each section in an oil pipeline 11 is not limited to this. In other embodiments of the present application, the aperture change of each section in an oil pipeline 11 can be adjusted according to actual design requirements, and the embodiment of the present application does not specifically limit this.

[0123] See also Figure 7 , Figure 7 A schematic diagram of the planar structure of an oil delivery pipe 11 of an oil injection pipe 10 provided in an embodiment of the present application. Figure 7 In the embodiment shown in (a), along the flow direction of the cooling oil, the aperture D1 of the first section 111 and the aperture D3 of the connecting section 113 may be, but are not limited to, gradually increased, and the aperture D2 of the second section 112 remains unchanged. The maximum aperture of the first section 111 is smaller than the minimum aperture of the connecting section 113, and the aperture D2 of the second section 112 is larger than the maximum aperture of the connecting section 113.

[0124] exist Figure 7In the embodiment shown in (b), along the flow direction of the cooling oil, the aperture D3 of a connecting section 113 and the aperture D2 of a second section 112 may be gradually increased, but not limited to, while the aperture D1 of a first section 111 remains unchanged. The aperture D1 of a first section 111 is smaller than the minimum aperture of a connecting section 113, and the minimum aperture of a second section 112 is larger than the maximum aperture of a connecting section 113.

[0125] exist Figure 7 In the embodiment shown in (c), along the flow direction of the cooling oil, the aperture D1 of the first section 111, the aperture D3 of the connecting section 113, and the aperture D2 of the second section 112 may also be gradually increased, but are not limited to. The minimum aperture of the first section 111 is smaller than the minimum aperture of the connecting section 113, and the minimum aperture of the second section 112 is larger than the maximum aperture of the connecting section 113.

[0126] Understandably, in Figure 7 In the illustrated embodiment, the aperture of at least one of a connecting section 113, a first section 111 or a second section 112 gradually increases along the flow direction of the cooling oil, so that the aperture of each section in an oil pipeline 11 can be adjusted according to actual design requirements or preparation requirements of an oil pipeline 11, so that an oil pipeline 11 can further meet the transportation requirements of cooling oil under different working conditions, so as to further improve the adaptability and applicability of an oil pipeline 11, and can further reduce the difficulty of preparing an oil pipeline 11.

[0127] In one embodiment, the outer diameter of a first section 111 is smaller than or equal to the outer diameter of a second section 112 , and the outer diameter of a connecting section 113 is greater than or equal to the outer diameter of a first section 111 and smaller than or equal to the outer diameter of a second section 112 .

[0128] exist Figure 6 In the illustrated embodiment, the outer diameters of the first section 111, the connecting section 113, and the second section 112 are all equal. It can also be understood that along the flow direction of the cooling oil, the outer diameter of the oil delivery pipe 11 remains unchanged, which can reduce the difficulty and requirements for preparing the oil delivery pipe 11 and avoid excessive structural changes that increase the preparation process and complexity of the oil delivery pipe 11.

[0129] It should be noted that in Figure 6 In the illustrated embodiment, only one possible embodiment of the outer diameter of an oil delivery pipe 11 is used as an example for illustrative description, but the outer diameter of an oil delivery pipe 11 is not limited to this. In other embodiments of the present application, the outer diameter of an oil delivery pipe 11 can be adjusted according to actual design requirements and actual application scenarios of an injection pipe 10, and the embodiments of the present application do not specifically limit this.

[0130] See also Figure 8 , Figure 8 A schematic diagram of the planar structure of an oil delivery pipe 11 of an oil injection pipe 10 provided in an embodiment of the present application. Figure 8 In the illustrated embodiment, the outer diameter of a first section 111 may be, but is not limited to, smaller than the outer diameter of a connecting section 113 and smaller than the outer diameter of a second section 112 .

[0131] It can be understood that by setting a segmented change in the outer diameter of an oil pipe 11 along the flow direction of the cooling oil, and multiple outer diameters can be but not limited to increasing successively along the flow direction of the cooling oil, so as to improve the overall structural strength of an oil pipe 11 while reducing the overall weight of an oil pipe 11, further improving the lightweight design of the powertrain 1000.

[0132] It should be noted that in Figure 6 and Figure 8 In the embodiment shown, only one possible embodiment of the change of the outer diameter of an oil delivery pipe 11 is used as an example for illustrative description, but the change of the outer diameter of an oil delivery pipe 11 provided in the embodiment of the present application is not limited to this. In other embodiments of the present application, the outer diameter of an oil delivery pipe 11 can also be adjusted according to the actual application scenario and structural design of an injection pipe 10, and the embodiment of the present application does not specifically limit this.

[0133] Please combine Figure 6 See also Fig. 9 , Fig. 9 The cross-sectional structure diagram of an oil delivery pipe 11 of an oil injection pipe 10 provided in an embodiment of the present application is shown in FIG. Figure 6 and Fig. 9 In the illustrated embodiment, an oil delivery pipe 11 further includes an oil guide groove 114, an oil guide groove 114 for receiving cooling oil output by a second section 112, and an oil guide groove 114 for guiding the cooling oil to a gear 1004a or a bearing 10096 of the reducer 1002.

[0134] Specifically, along the flow direction of the cooling oil, an oil guide groove 114 is provided at one end of a second section 112 away from a first section 111. That is, the cooling oil in a second section 112 is guided to a gear 1004a or a bearing 10096 of the reducer 1002 through an oil guide groove 114, which can form an effect of increasing the extension length of the oil delivery pipe 11 along the flow direction of the cooling oil.

[0135] It can be understood that by adding an oil guide groove 114 on the oil outlet side of a second section 112 and guiding the cooling oil in a second section 112 to a gear 1004a or a bearing 10096 of the reducer 1002 through an oil guide groove 114, the accuracy of an oil pipe 11 in delivering cooling oil to a position to be lubricated in the power assembly 1000 can be further improved, thereby improving the efficiency and effect of delivering the cooling oil to the position to be lubricated or the position to be dissipated.

[0136] At the same time, by increasing the extension length of an oil delivery pipe 11 along the flow direction of the cooling oil, an oil injection pipe 10 in the power assembly 1000 can meet the delivery requirements of the cooling oil under different working conditions, which can expand the use scope and application scenarios of an oil injection pipe 10 and improve the applicability of an oil injection pipe 10. In addition, while realizing the function of delivering cooling oil, the oil guide groove 114 can reduce the weight of an oil delivery pipe 11 because it is a non-enclosed pipe structure, further improving the lightweight design of the power assembly 1000.

[0137] In one embodiment, the cross-sectional shape of an oil guide groove 114 along the flow direction of the cooling oil is circular, and the inner diameter of the groove bottom 114 a of the oil guide groove 114 is greater than or equal to the hole diameter D2 of the second section 112 .

[0138] Specifically, along the flow direction of the cooling oil, the cross-sectional shape of an oil guide groove 114 is the same as the cross-sectional shape of a second section 112, and the inner diameter of the groove bottom 114a of an oil guide groove 114 is greater than or equal to the aperture D2 of a second section 112, which can reduce the overall weight of an oil pipeline 11 while further reducing the difficulty and requirements for preparing an oil pipeline 11, thereby further improving the preparation efficiency of an oil pipeline 11.

[0139] In one embodiment, the extension direction of an oil guide groove 114 is the same as the extension direction of at least one of a first section 111 or a second section 112. That is, the central axis of an oil guide groove 114 coincides with at least one of the axis of a first section 111 or an axis of a second section 112, so that an oil guide groove 114 extends along the flow direction of the cooling oil. Figure 6 and Fig. 9 In the illustrated embodiment, along the flow direction of the cooling oil, the axes of a first section 111 , a second section 112 , and an oil guide groove 114 coincide with each other, that is, the extension directions of the three are the same.

[0140] It can be understood that by arranging the central axis of an oil guide groove 114, the axis of a first section 111, and the axis of a second section 112 to coincide at the same time, it can be ensured that an oil guide groove 114 can accurately and efficiently guide the cooling oil to a gear 1004a or a bearing 10096 of the reducer 1002, so as to improve the lubrication effect of the cooling oil on the gear 1004a or the bearing 10096. At the same time, an oil delivery pipe 11 is in a straight line extending along the flow direction of the cooling oil as a whole, which can further reduce the difficulty and requirements of preparing an oil delivery pipe 11, and further improve the preparation efficiency of the power assembly 1000.

[0141] In one embodiment, an extension length L4 of an oil guiding groove 114 is less than or equal to an extension length L2 of a second section 112 , and an extension length L4 of an oil guiding groove 114 is greater than or equal to an extension length L1 of a first section 111 .

[0142] It can be understood that since the fully enclosed pipe structure can form a containment effect on the cooling oil inside it, the extension length L4 of an oil guide groove 114 along the flow direction of the cooling oil is less than the extension length L2 of a second section 112, which can extend the path length of an oil pipeline 11 for containing the cooling oil, thereby avoiding the extension length L4 of an oil guide groove 114 being too large, causing the cooling oil to be exposed prematurely during the transportation process, and possibly causing the undesirable phenomenon of cooling oil loss during the transportation process.

[0143] At the same time, since the extension length of an oil guide groove 114 is not limited by the aperture ratio during the preparation process, the preparation difficulty of an oil guide groove 114 is lower than that of a first section 111 with a larger aperture ratio. Therefore, by setting the extension length L4 of an oil guide groove 114 to be greater than or equal to the extension length L1 of a first section 111, the preparation difficulty of a first section 111 can be further reduced, and the extension length of an oil delivery pipe 11 can be further increased, so as to ensure that the overall extension length of an oil delivery pipe 11 meets the transportation requirements of cooling oil under different working conditions, and at the same time, the preparation difficulty and requirements of an oil delivery pipe 11 can be further reduced.

[0144] In one embodiment, along the vertical direction, the notch 114b of an oil guide groove 114 is located above the groove bottom 114a of an oil guide groove 114. When the power assembly 1000 is installed on a vehicle, by arranging the notch 114b of an oil guide groove 114 to be located above the groove bottom 114a of an oil guide groove 114 along the vertical direction, the groove bottom 114a of an oil guide groove 114 can ensure the effect of receiving and carrying the cooling oil inside it. It can avoid the notch 114b of an oil guide groove 114 from being tilted relative to the vertical direction, thereby avoiding the loss of cooling oil in an oil guide groove 114.

[0145] In one embodiment, the groove depth H1 or groove width W1 (eg Figure 8 At least one of the second sections 112 is greater than or equal to half of the aperture D2. Figure 6 and Fig. 9 In the illustrated embodiment, along the circumference of a second section 112, the maximum size of a slot 114b of an oil guide groove 114 is less than or equal to half of the circumference of a second section 112, which can improve the containment effect of an oil guide groove 114 on cooling oil and avoid the undesirable phenomenon that cooling oil may leak out from a slot 114b of an oil guide groove 114, thereby reducing the loss of cooling oil during the transportation process.

[0146] That is, by increasing the height of the groove wall of an oil guide groove 114 in the vertical direction, the efficiency and effect of conveying cooling oil by an oil pipe 11 can be further improved, so as to further improve the working efficiency and life of the power assembly 1000.

[0147] Please also read Figure 10-12 , Fig.10 This is a schematic diagram of the appearance structure of a fuel injection pipe 10 provided in an embodiment of the present application. Fig.11 This is a schematic diagram of the appearance structure of a fuel injection pipe 10 provided in an embodiment of the present application. Fig.12 The schematic diagram of the partial cross-sectional structure of an oil injection pipe 10 provided in an embodiment of the present application. The oil injection pipe 10 includes another oil delivery pipe 12, and the extension direction of the other oil delivery pipe 12 intersects with the extension direction of the one oil delivery pipe 11. In the direction of the cooling oil flow, the other oil delivery pipe 12 is used to receive the cooling oil and to deliver the cooling oil to a first section 111 of the one oil delivery pipe 11.

[0148] exist Figure 10-12 In the illustrated embodiment, along the flow direction of the cooling oil, a first section 111 of an oil pipe 11 points away from an opening 111a of a second section 112 and is connected to an outer peripheral wall 12a of another oil pipe 12, so that the oil in the other oil pipe 12 can be transported from a first section 111 of an oil pipe 11 away from an opening 111a of a second section 112 to an oil pipe 11, and transported to a position to be lubricated or a position to be heat dissipated via a first section 111 and a second section 112, respectively.

[0149] It can be understood that by setting up an oil pipe 11 connected to the outer peripheral wall 12a of another oil pipe 12, other oil pipes can be arranged in the extension length direction of the other oil pipe 12, so that one fuel injection pipe 10 can simultaneously transport cooling oil to multiple positions to be lubricated and multiple positions to be dissipated. While improving the lubrication and heat dissipation efficiency of one fuel injection pipe 10 for the power assembly 1000, it is also possible to reduce the structural dimensions of one fuel injection pipe 10 along the extension length direction of another fuel pipe 12, thereby simplifying the internal structural design of the power assembly 1000.

[0150] In one embodiment, the aperture D5 of the other oil delivery pipe 12 is larger than the aperture D1 of the first section 111 of the one oil delivery pipe 11. Since the other oil delivery pipe 12 may be used to simultaneously deliver cooling oil to multiple locations to be lubricated or to be cooled in the power assembly 1000, the flow rate of cooling oil in the other oil delivery pipe 12 is larger than the flow rate of cooling oil in the one oil delivery pipe 11.

[0151] That is, by setting the aperture D5 of another oil pipe 12 larger than the aperture D1 of a first section 111 of an oil pipe 11, it can be ensured that an injection pipe 10 can deliver sufficient cooling oil to each position to be lubricated or each position to be dissipated, so as to ensure the lubrication effect of each position to be lubricated and the heat dissipation cooling effect of each heat dissipation position, thereby further improving the working efficiency and life of the powertrain 1000.

[0152] In one embodiment, the other oil delivery pipe 12 is further used to connect a nozzle 13, and the nozzle 13 is used to receive cooling oil through the other oil delivery pipe 12. Specifically, along the flow direction of the cooling oil, one nozzle 13 is connected to the outer peripheral wall of the other oil delivery pipe 12, and one nozzle 13 is arranged at intervals on one side of the one oil delivery pipe 11 along the extension direction of the other oil delivery pipe 12.

[0153] It can be understood that a nozzle 13 is provided on one side of the oil outlet of the other branch oil pipeline of another oil pipeline 12, and the cooling oil in the other oil pipeline 12 is transported to the nozzle 13 through the oil pipeline of the other branch, and can be transported through the nozzle 13 to other positions to be lubricated or positions to be dissipated of heat in the powertrain 1000, which are different from a gear 1004a, a bearing 10096 or a stator winding end corresponding to an oil pipeline 11.

[0154] That is, another oil delivery pipe 12 is also connected to a nozzle 13, so that functional structural devices at different positions to be lubricated or heat-dissipated can be lubricated or heat-dissipated, further improving the cooling oil delivery efficiency and effect of an oil injection pipe 10.

[0155] In one embodiment, along the flow direction of the cooling oil in the other oil pipeline 12 , a nozzle 13 is arranged adjacent to an oil pipeline 11 , and the interval between the nozzle 13 and the oil pipeline 11 is greater than the aperture D5 of the other oil pipeline 12 .

[0156] It can be understood that by setting the interval between a nozzle 13 and a fuel pipe 11 to be greater than the aperture D5 of the other fuel pipe 12 along the extension direction of the other fuel pipe 12, it is possible to avoid reducing the overall structural strength of a fuel injection pipe 10 due to the interval between a nozzle 13 and a fuel pipe 11 being too small, thereby improving the working efficiency and reliability of a fuel injection pipe 10.

[0157] In one embodiment, the housing 1003 includes an oil delivery hole (not shown in the figure) and an oil discharge port (not shown in the figure), wherein the oil delivery hole is used to deliver cooling oil to an oil delivery pipe 11 through another oil delivery pipe 12. The housing 1003 is also used to accommodate cooling oil output from an oil delivery pipe 11, and the oil discharge port is used to discharge the cooling oil accommodated in the housing 1003.

[0158] Among them, the housing 1003 may include, but is not limited to, a motor receiving chamber (not shown in the figure) for receiving the motor 1001, or a reducer receiving chamber (not shown in the figure) for receiving the reducer 1002. After the cooling oil is delivered to a gear 1004a or a bearing 10096 through an oil delivery pipe 11 of an oil injection pipe 10 for lubrication, or the cooling oil is delivered to the end of the stator winding for heat dissipation, the used cooling oil is respectively received in the motor receiving chamber or the reducer receiving chamber. In this embodiment, an oil discharge port can be understood as an opening opened in the motor receiving chamber or the reducer receiving chamber for discharging cooling oil, and is illustrated as an oil discharge port. In addition, the cooling oil discharged through an oil discharge port flows into the oil pool 10095 of the housing 1003 for storage.

[0159] The oil pump 10092 delivers the cooling oil discharged from an oil discharge port to an oil delivery hole through at least one of the internal oil passage or the external oil passage of the housing 1003 .

[0160] It can be understood that the other oil pipe 12 is fixed to the shell 1003, and the opening at one end of the other oil pipe 12 is connected to an oil hole opened in the shell 1003, so that the cooling oil of the oil circuit relative to the outside of the shell 1003 can be transported to the other oil pipe 12 through an oil hole, so that the cooling oil can lubricate or dissipate heat for the functional structural devices in the powertrain 1000.

[0161] When the cooling oil completes lubrication or heat dissipation of each functional structural device, the used cooling oil flows into the oil pool 10095 of the shell 1003 and is stored, so that the shell 1003 can achieve the effect of accommodating the cooling oil output by an oil pipe 11, so that the cooling oil that completes lubrication and heat dissipation can circulate and avoid waste.

[0162] An oil pump 10092 provides negative pressure to absorb the cooling oil contained in the shell 1003, and transports the cooling oil in sequence to a cooling oil coarse filter device, a heat exchanger, a cooling oil fine filter device and other functional devices to improve the cleanliness of the cooling oil and reduce the temperature of the cooling oil, thereby achieving the recycling effect of the cooling oil and further improving the working efficiency and life of the powertrain 1000.

[0163] When the cleanliness of the cooling oil is improved and the temperature is reduced, an oil pump 10092 can apply pressure to the cooling oil and can deliver the cooling oil from one oil delivery hole to another oil delivery pipe 12. At the same time, the pressure applied to the cooling oil by an oil pump 10092 can ensure the flow effect of the cooling oil in another oil delivery pipe 12 and an oil delivery pipe 11, and can ensure that the cooling oil has sufficient power to be delivered to the position to be lubricated or the position to be cooled.

[0164] Of course, the above-mentioned embodiments can be applied individually or in combination. The above is the preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. A powertrain with a multi-section variable aperture fuel injection pipe, characterized in that: The power assembly includes a housing and an oil injection pipe, the housing is used to accommodate at least one of the reducer or the motor of the power assembly and the oil injection pipe, the oil injection pipe includes an oil delivery pipe, the oil delivery pipe includes an integrally formed first section and a second section, the aperture of the first section is smaller than the aperture of the second section, wherein: Along the flow direction of the cooling oil, the first section is used to receive the cooling oil and to transport the cooling oil to the second section, and the second section is used to output the cooling oil to lubricate a gear or a bearing of the reducer or to dissipate heat from the stator winding end of the motor.

2. The powertrain according to claim 1, characterized in that: The oil pipeline includes a connecting section, and the connecting section is used to connect the first section and the second section along the flow direction of the cooling oil. The aperture of at least one of the connecting section, the first section or the second section gradually increases along the flow direction of the cooling oil.

3. The powertrain according to claim 2, characterized in that: The outer diameter of the first section is smaller than or equal to the outer diameter of the second section, and the outer diameter of the connecting section is greater than or equal to the outer diameter of the first section and smaller than or equal to the outer diameter of the second section.

4. The powertrain according to claim 1, characterized in that: The oil pipeline further includes an oil guide groove, which is used to receive the cooling oil outputted by the second section, and the oil guide groove is used to guide the cooling oil to the gear or the bearing of the reducer.

5. The powertrain according to claim 4, characterized in that: The extension direction of the oil guide groove is the same as the extension direction of at least one of the first section or the second section, the extension length of the oil guide groove is less than or equal to the extension length of the second section, and the extension length of the oil guide groove is greater than or equal to the extension length of the first section.

6. The powertrain according to claim 5, characterized in that: At least one of a groove depth or a groove width of the oil guide groove is greater than or equal to half of a hole diameter of the second section.

7. The powertrain according to claim 1, characterized in that: The one fuel injection pipe includes another fuel delivery pipe, the extension direction of the another fuel delivery pipe intersects with the extension direction of the one fuel delivery pipe, wherein: Along the flow direction of the cooling oil, the other oil delivery pipe is used to receive the cooling oil and to deliver the cooling oil to the one first section of the one oil delivery pipe.

8. The powertrain according to claim 7, characterized in that: The aperture of the other oil pipeline is larger than the aperture of the first section of the one oil pipeline.

9. The powertrain according to claim 7, characterized in that: The other oil delivery pipe is also used to connect a nozzle, and the nozzle is used to receive cooling oil through the other oil delivery pipe, wherein: Along the flow direction of the cooling oil in the other oil pipeline, the one nozzle is arranged adjacent to the one oil pipeline, and the interval between the one nozzle and the one oil pipeline is greater than the aperture of the other oil pipeline.

10. The powertrain according to claim 7, characterized in that: The housing comprises: an oil delivery hole, the oil delivery hole being used to deliver cooling oil to the one oil delivery pipe through the other oil delivery pipe, the housing being used to contain the cooling oil outputted from the one oil delivery pipe; an oil discharge port, the oil discharge port being used to discharge cooling oil contained in the housing; An oil pump is used to deliver the cooling oil discharged from the oil discharge port to the oil delivery hole through at least one of the internal oil passage or the external oil passage of the housing.

11. The power assembly according to any one of claims 1 to 10, characterized in that: The extension direction of the first segment is the same as the extension direction of the second segment, the axis of the first segment overlaps with the axis of the second segment, and the extension length of the first segment is less than or equal to the extension length of the second segment.

12. The power assembly according to any one of claims 1 to 10, characterized in that: A ratio of an extension length of the first section along a flow direction of the cooling oil to a hole diameter of the first section is less than or equal to 6.

13. The power assembly according to any one of claims 1 to 10, characterized in that: The aperture D1 of the first section and the aperture D2 of the second section satisfy the condition: D2 ≥ 2D1.

14. A fuel injection pipe with multiple sections of variable aperture, characterized in that: The fuel injection pipe includes an oil delivery pipe and another oil delivery pipe, the extension direction of the other oil delivery pipe intersects with the extension direction of the one oil delivery pipe, the one oil delivery pipe includes an integrally formed first section, a second section and an oil guide groove, the aperture of the first section is smaller than the aperture of the second section, wherein: Along the flow direction of the cooling oil, the other oil delivery pipe is used to receive the cooling oil and to deliver the cooling oil to the first section of the one oil delivery pipe, the first section is used to deliver the cooling oil to the second section, the second section is used to output the cooling oil, the one oil guide groove is used to receive the cooling oil output by the second section, and the one oil guide groove is used to guide the cooling oil to a gear or a bearing of the reducer; The extension direction of the first section and the second section are the same as the extension direction of the oil guide groove, and the extension length of the first section is less than or equal to the extension length of at least one of the second section and the oil guide groove.

15. A vehicle, characterized in that: The vehicle comprises wheels and a powertrain as claimed in any one of claims 1 to 13 or comprises a fuel injection pipe as claimed in claim 14, wherein the powertrain is used to drive the wheels.

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