Extended-range power assembly and extended-range electric vehicle

Abstract

An extended-range power assembly (10) and an extended-range electric vehicle (1). Two housings (100, 200) of the extended-range power assembly (10) enclose an accommodating cavity, and the accommodating cavity houses two parallel-shaft speed reducers arranged side by side. One side of one housing (100) comprises two recesses (111, 112) arranged side by side, which are respectively configured to fix a motor stator and a generator stator. An outer peripheral surface of one housing (100) comprises two oil outlets (O1, O2) distributed at an interval, which are respectively configured to accommodate blocking elements. One housing (100) comprises two internal oil passages (131, 132) in communication with each other, wherein one internal oil passage (131) protrudes from one side of one housing (100), and the other internal oil passage (132) protrudes from the other side of one housing (100). A recess wall of each recess (111, 112) comprises a through hole (T31, T33), and the through hole (T31) of one recess (111) is configured to communicate with one oil outlet (O1), one internal oil passage (131) and an internal oil passage of a motor stator core. The through hole (T33) of the other recess (112) is configured to communicate with the other oil outlet (O2), the other internal oil passage (132) and an internal oil passage of a generator stator core.

Description

Extended-range power assembly and extended-range electric vehicle

[0001] The present application claims priority to the Chinese patent application No. 202410789740.1, filed on June 18, 2024, entitled "Extended-range power assembly and extended-range electric vehicle", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of extended-range electric vehicles, and more particularly, to an extended-range power assembly and an extended-range electric vehicle. BACKGROUND

[0003] With the development of new energy technology, extended-range electric vehicles have been more widely used. The extended-range power assembly is provided with two motors and two reducers, and the output shaft of each reducer is drivingly connected with the input shaft of one motor. In the process of driving the reducer by the motor, the motor and the reducer will generate a large amount of heat and wear. If not cooled and lubricated in time, it will cause the transmission failure of the extended-range power assembly.

[0004] However, the existing cooling and lubricating system of the extended-range power assembly is relatively complex, has a high production cost, and has a low space utilization rate. SUMMARY

[0005] The present application provides an extended-range power assembly and an extended-range electric vehicle. The cooling and lubricating system of the extended-range power assembly is relatively simple, has a low production cost, and has a high space utilization rate. Furthermore, the performance of the extended-range power assembly and the performance of the extended-range electric vehicle are improved.

[0006] In a first aspect, a range-extending power assembly is provided. The range-extending power assembly includes two housings. One of the housings includes two annular grooves arranged in parallel, one of the annular grooves is used to fix a stator of an electric motor, and the other of the annular grooves is used to fix a stator of a generator. The other of the housings is used to enclose the other of the housings to form a reducer accommodating cavity. The reducer accommodating cavity is used to accommodate two parallel shaft reducers arranged in parallel. One of the parallel shaft reducers includes an input shaft, an intermediate shaft and an output shaft. The other of the parallel shaft reducers includes another input shaft and another output shaft. An outer circumferential surface of one of the housings includes two oil outlets arranged at intervals. The two oil outlets are respectively used to accommodate two blocking members. A slot wall of each of the annular grooves includes a radial through hole. One of the radial through holes of one of the annular grooves is respectively used to communicate with one of the oil outlets, an internal oil channel of one of the housings, and an internal oil channel of a stator core of the electric motor. The internal oil channel of one of the housings protrudes from one side of one of the housings. One of the radial through holes of the other of the annular grooves is respectively used to communicate with the other of the oil outlets, an internal oil channel of the other of the housings, and an internal oil channel of the stator core of the generator. The internal oil channel of the other of the housings protrudes from the other side of one of the housings. The internal oil channel of the other of the housings communicates with the internal oil channel of one of the housings.

[0007] In the range-extending power assembly provided by the embodiments of the present application, the oil outlets of the internal oil channels of one of the housings are arranged on the outer circumferential surface of one of the housings. The oil outlets of the internal oil channels are blocked by the blocking members. The radial through holes are arranged on the inner slot walls of the annular grooves and respectively communicate with the internal oil channels of the stator cores of the motors and the internal oil channels of one of the housings. Thus, the lubricating oil in the internal oil channels of one of the housings can be introduced into the internal oil channels of the stator cores of the motors. The stator cores of the motors in the range-extending power assembly can be cooled and lubricated. Thus, the cooling and lubrication requirements of the motors in the range-extending power assembly can be ensured. The cooling and lubrication system of the range-extending power assembly is relatively simple. The processing technology is simple. The production cost is low.

[0008] In addition, the oil outlets of the internal oil channels of one of the housings are arranged on the outer circumferential surface of one of the housings. The internal oil channels of one of the housings protrude from one side of one of the housings. Thus, on the basis of ensuring the strength of the internal oil channels of one of the housings, the internal oil channels of one of the housings do not affect the layout of other components of one of the housings. The space utilization of one of the housings is improved. Furthermore, the performance of the range-extending power assembly is improved.

[0009] In an implementation, each annular groove comprises an end face facing away from one side of the housing, each end face of the annular groove comprises an axial through hole, and each axial through hole of each annular groove is used for accommodating a blocking piece. The axial through hole of one annular groove is used for connecting the radial through hole of one annular groove and the internal oil passage of the housing. The axial through hole of the other annular groove is used for connecting the radial through hole of the other annular groove and the other internal oil passage of the housing.

[0010] By machining the axial through holes respectively connected with the internal oil passage of the housing and the radial through hole of each annular groove on the end face of each annular groove facing away from one side of the housing, and blocking each axial through hole with a blocking piece, the lubricating oil in each internal oil passage of the housing can be introduced into the internal oil passage of the stator core of each motor. In this way, the cooling and lubricating system of the extended-range power assembly can be further simplified and the processing cost can be further reduced.

[0011] In an implementation, the cross-sectional area of the axial through hole of one annular groove and the cross-sectional area of the radial through hole are respectively smaller than the cross-sectional area of the internal oil passage of the housing. The cross-sectional area of the axial through hole of the other annular groove and the cross-sectional area of the radial through hole are respectively smaller than the cross-sectional area of the other internal oil passage of the housing.

[0012] Correspondingly, compared with each internal oil passage of the housing, the flow rate of the lubricating oil in the axial through hole and the radial through hole of the annular groove is faster, and the efficiency of the lubricating oil in cooling and lubricating the stator core of each motor of the extended-range power assembly is improved.

[0013] In an implementation, the other side of the housing further comprises two shaft holes, one shaft hole is used for connecting the reducer accommodating cavity and one annular groove and fixing a bearing of one input shaft, and the other shaft hole is used for connecting the reducer accommodating cavity and the other annular groove and fixing a bearing of the other input shaft. The spacing between one internal oil passage of the housing and one shaft hole is smaller than the spacing between one internal oil passage of the housing and the other shaft hole, and one internal oil passage of the housing is used for connecting one shaft hole. The other internal oil passage of the housing is arranged adjacent to the other shaft hole, and the other internal oil passage of the housing is used for connecting the other shaft hole.

[0014] The internal oil passage of the housing is arranged close to the shaft hole, so that the internal oil passage of the housing does not affect the layout of other components of the housing. In addition, the internal oil passage of the housing is communicated with the shaft hole, so that the lubricating oil of the internal oil passage of the housing can be introduced into the shaft hole to realize active cooling and lubrication of the gears and bearings of the input shaft of the parallel shaft reducer connected with the motor. Therefore, the cooling and lubrication effect of the gears and bearings of each shaft of the parallel shaft reducer connected with the motor is improved.

[0015] The other internal oil passage of the housing is arranged close to the other shaft hole, so that the other internal oil passage of the housing does not affect the layout of other components of the housing. In addition, the other internal oil passage of the housing is communicated with the other shaft hole, so that the lubricating oil of the other internal oil passage of the housing can be introduced into the other shaft hole to realize active cooling and lubrication of the gears and bearings of the input shaft of the parallel shaft reducer connected with the motor. Therefore, the cooling and lubrication effect of the gears and bearings of each shaft of the parallel shaft reducer connected with the motor is improved.

[0016] In an implementation manner, the inner hole wall of the shaft hole comprises an oil outlet, and the oil outlet of the inner hole wall of the shaft hole is used for communicating the internal oil passage of the housing.

[0017] In this way, by machining the oil outlet communicated with the internal oil passage of the housing on the inner hole wall of the shaft hole, the lubricating oil of the internal oil passage of the housing can be introduced into the shaft hole, so that the gears and bearings of each shaft of the parallel shaft reducer of the range-extending power assembly are actively cooled and lubricated. Further, not only the cooling and lubrication requirements of the gears and bearings of each shaft of the parallel shaft reducer of the range-extending power assembly can be ensured, but also the cooling and lubrication system of the range-extending power assembly can be further simplified, the machining process is simple, and the production cost is low.

[0018] In an implementation manner, the cross-sectional area of the oil outlet of the inner hole wall of the shaft hole is smaller than the cross-sectional area of the internal oil passage of the housing.

[0019] In this way, after the lubricating oil flows out of the oil outlet of the shaft hole, the lubricating oil is slowed down and expanded, and is sprayed into the shaft hole like an oil nozzle, so that the lubricating oil can be uniformly sprayed into the shaft hole. Further, the range-extending power assembly does not need to additionally arrange components such as oil nozzles and oil pipes, and the production cost of the range-extending power assembly is further reduced.

[0020] In an implementation, the inner hole wall of the other shaft hole comprises a ring-shaped protrusion, the ring-shaped protrusion is used to separate the other shaft hole into two bearing cavities, one bearing cavity is used to fix a bearing of the other input shaft, the other bearing cavity is used to fix a bearing of the motor shaft of the generator. The ring-shaped protrusion comprises two end faces arranged in opposite directions along the axial direction of the other input shaft, each end face comprises an oil outlet, and each oil outlet of each end face is used to communicate with the other internal oil passage of the housing.

[0021] By machining the ring-shaped protrusion on the inner hole wall of the other shaft hole, the axial fixation of the bearing of the other input shaft and the bearing of the motor shaft of the generator in the other shaft hole can be achieved, and the machining process of the range-extending power assembly is further simplified.

[0022] In addition, by machining the oil outlets on the two end faces of the ring-shaped protrusion to communicate with the other internal oil passage of the housing, the lubricating oil of the other internal oil passage of the housing can be introduced into the bearing cavities of the bearing of the other input shaft and the bearing of the motor shaft of the generator respectively, so that the gears and bearings of each shaft of the other parallel shaft reducer of the range-extending power assembly and the gears and bearings of the motor shaft of the generator are actively cooled and lubricated. In this way, on the one hand, the cooling and lubrication requirements of the gears and bearings of each shaft of the other parallel shaft reducer of the range-extending power assembly and the gears and bearings of the motor shaft of the generator can be ensured. On the other hand, the cooling and lubrication system of the range-extending power assembly is further simplified, and the machining process is simple. On the other hand, the range-extending power assembly does not need to additionally arrange oil nozzles and oil guide pipes and other components, and the production cost of the range-extending power assembly is further reduced.

[0023] In an implementation, the oil outlet of at least one end face communicates with the inner circumferential surface of the ring-shaped protrusion, and the cross-sectional area of the oil outlet of each end face is smaller than the cross-sectional area of the other internal oil passage of the housing. In this way, the oil outlet of the end face can limit the flow of lubricating oil to each bearing cavity, avoiding excessive lubricating oil flowing to each bearing cavity.

[0024] In an implementation, the other side of the housing further comprises two protrusions, and each protrusion comprises an oil outlet facing away from the side surface of the housing.

[0025] The extension direction of one protrusion is from one internal oil passage of the housing to the other housing, and the oil outlet of the protrusion is used to communicate with the internal oil passage of the housing. In this way, the lubricating oil of the internal oil passage of the housing can be introduced into other components through the oil outlet of the protrusion, and the cooling and lubrication system of the range-extending power assembly is further simplified, the machining process is simple, and the production cost is low.

[0026] The extending direction of the other protrusion is from the other internal oil passage of the one housing to the other housing, and the oil outlet of the other protrusion is used to communicate the other internal oil passage of the one housing. In this way, the lubricating oil of the other internal oil passage of the one housing can be introduced into other components through the oil outlet of the other protrusion, and the cooling and lubricating system of the extended-range power assembly is further simplified, the processing technology is simple, and the production cost is low.

[0027] In an implementation manner, the other side of the one housing further comprises two bearing grooves, one bearing groove is used to fix a bearing of the intermediate shaft, and the other bearing groove is used to fix a bearing of the other output shaft. The inner groove wall of the other bearing groove comprises an oil outlet, the oil outlet of the inner groove wall of the other bearing groove is used to communicate the other internal oil passage of the one housing, the spacing between the other internal oil passage of the one housing and the one bearing groove is greater than the spacing between the other internal oil passage of the one housing and the other bearing groove, and the other internal oil passage of the one housing protrudes from the other side of the one housing.

[0028] Compared with the one bearing groove, the other internal oil passage of the one housing is arranged close to the other bearing groove, and the other internal oil passage of the one housing protrudes from the other side of the one housing. In this way, on the basis of ensuring the strength of the other internal oil passage of the one housing, the other internal oil passage of the one housing does not affect the layout of other components of the one housing, the space utilization of the one housing is improved, and the performance of the extended-range power assembly is improved.

[0029] In an implementation manner, the cross-sectional area of the oil outlet of the inner groove wall of the other bearing groove is less than the cross-sectional area of the other internal oil passage of the one housing.

[0030] In this way, the lubricating oil flowing out of the oil outlet of the inner groove wall of the other bearing groove is slowed down and expanded, and is sprayed into the other bearing groove like an oil nozzle, so that the lubricating oil can be uniformly sprayed into the other bearing groove. In this way, the extended-range power assembly does not need to additionally arrange an oil nozzle and an oil pipe, and the production cost of the extended-range power assembly is further reduced.

[0031] In an implementation manner, the other side of the one housing further comprises another protrusion, the other protrusion is arranged between the two bearing grooves, and the spacing between the other protrusion and the one bearing groove is greater than the spacing between the other protrusion and the other bearing groove. The side of the other protrusion away from the other side of the one housing comprises an oil outlet, the oil outlet of the other protrusion is used to communicate the internal oil passage of the one housing and the other internal oil passage of the one housing respectively, and the oil outlet of the other protrusion is used to spray oil through the oil nozzle.

[0032] Since the other internal oil channel of the shell is arranged close to the other one of the two bearing grooves, in order to avoid arranging an excessively long oil channel to introduce lubricating oil into one bearing groove, a further protrusion is arranged directly at the connection of the one internal oil channel of the shell and the other internal oil channel of the shell. In this way, the lubricating oil of the oil outlet of the further protrusion can be sprayed towards the bearings and gears of the intermediate shaft and the output shaft of the parallel shaft speed reducer, so as to realize active cooling and lubrication of the gears and bearings of the intermediate shaft and the output shaft of the parallel shaft speed reducer. Therefore, the cooling and lubrication effect of the gears and bearings of each shaft of the parallel shaft speed reducer driven by the motor is improved.

[0033] In an implementation manner, the shell comprises an oil pump accommodating groove for fixing an oil pump, the oil pump accommodating groove is arranged adjacent to the other annular groove, and the opening of the oil pump accommodating groove faces away from the other internal oil channel of the shell.

[0034] Since the two sides of the shell are provided with the internal oil channels and the accommodating cavities of the generator, the motor and the parallel shaft speed reducers, the oil pump accommodating groove is arranged on the outer circumferential surface of the shell, so as to improve the space utilization of the shell. Further, the performance of the extended-range powertrain is improved.

[0035] In an implementation manner, the groove wall of the oil pump accommodating groove comprises a through hole, the through hole of the groove wall of the oil pump accommodating groove is used for connecting the oil inlet of the heat exchanger. The side of the shell further comprises a further protrusion, the side of the further protrusion facing away from the side surface of the shell comprises a through hole, and the through hole of the further protrusion is used for connecting the other internal oil channel of the shell and the oil outlet of the heat exchanger.

[0036] Since the side of the shell is provided with only the accommodating cavities of the generator and the motor, the setting space of the side of the shell is more sufficient compared with the other side of the shell, and therefore the oil inlet of the heat exchanger and the oil outlet of the heat exchanger are arranged on the side of the shell, so as to improve the space utilization of the shell. Further, the performance of the extended-range powertrain is improved.

[0037] In an implementation manner, the side of the other shell further comprises two other bearing grooves, each of the two other bearing grooves is used for connecting the speed reducer accommodating cavity, one of the two other bearing grooves is used for fixing the other bearing of the input shaft, and the other of the two other bearing grooves is used for fixing the other bearing of the other input shaft.

[0038] The other side of the other housing further comprises two protrusions, each of the two protrusions is arranged in one of the two bearing grooves, and each of the two protrusions comprises an oil outlet towards the side of the one housing, the oil outlet of one of the two protrusions is used to communicate with an axial oil passage of one of the input shafts, and the oil outlet of the other of the two protrusions is used to communicate with an axial oil passage of the other input shaft.

[0039] In this way, the lubricating oil flowing out of the oil outlet of one of the two protrusions can be introduced into the axial oil passage of the input shaft of each parallel shaft reducer, and the rotor of the motor or generator drivingly connected to the input shaft of each parallel shaft reducer can be cooled, and the cooling and lubricating system of the extended-range powertrain is relatively simple, the processing technology is simple, and the production cost is low.

[0040] In one implementation, the other side of the other housing further comprises two oil inlets, one of the two oil inlets is used to communicate the oil outlet of one of the two protrusions with an internal oil passage of the one housing, and the other of the two oil inlets is used to communicate the oil outlet of the other of the two protrusions with another internal oil passage of the one housing. The one of the two oil inlets is arranged adjacent to one of the two bearing grooves, and the other of the two oil inlets is arranged adjacent to the other of the two bearing grooves.

[0041] Since each of the two bearing grooves of the other side of the other housing and one of the two shaft holes of the other side of the one housing are used to support the two ends of the input shaft of the same parallel shaft reducer, each of the two protrusions is arranged in one of the two bearing grooves of the other housing, and each of the two shaft holes of the one housing is arranged adjacent to the internal oil passage or the other internal oil passage of the one housing, each of the two oil inlets is arranged close to one of the two bearing grooves, on the one hand, the length of the oil passage communicated between the oil outlet of each of the two protrusions and the one oil inlet can be reduced, and thus the weight of the extended-range powertrain can be reduced. On the other hand, the length of the oil passage communicated between each of the two oil inlets and the internal oil passage or the other internal oil passage of the one housing can be reduced, and thus the volume of the extended-range powertrain can be reduced.

[0042] In a second aspect, an extended-range electric vehicle is provided, the extended-range electric vehicle comprising wheels, a battery pack, and the extended-range powertrain as described in the first aspect and any one of the possible implementation manners of the first aspect, the extended-range powertrain being configured to receive power from the battery pack and drive the wheels.

[0043] Since the production cost of the extended-range powertrain provided in the first aspect is low, the production cost of the electric vehicle provided in the second aspect can also be reduced. Attached Figure Description

[0044] Figure 1 is a schematic diagram of the structure of an electric vehicle provided in an embodiment of this application.

[0045] Figures 2 and 3 are schematic diagrams of a range-extended powertrain provided in an embodiment of this application.

[0046] Figure 4 is a structural schematic diagram of one of the housings in the range-extended powertrain shown in Figure 3.

[0047] Figure 5 is a schematic cross-sectional view of the shell shown in Figure 4 along the AA direction.

[0048] Figure 6 is a structural schematic diagram of one of the housings in the range-extended powertrain shown in Figure 3.

[0049] Figure 7 is a schematic cross-sectional view of the shell shown in Figure 6 along the BB direction.

[0050] Figure 8 is an enlarged schematic diagram of part C of a shell shown in Figure 7.

[0051] Figure 9 is a schematic diagram of the bearing sleeve in the range-extended powertrain shown in Figure 3.

[0052] Figure 10 is a structural schematic diagram of another housing in the range-extended powertrain shown in Figure 3.

[0053] Figure 11 is a schematic cross-sectional view of the range-extended powertrain shown in Figure 2 along the DD direction. Detailed Implementation

[0054] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0055] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0056] The terms "upper," "lower," "inner," and "outer" used in the embodiments of this application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] Reference being made to "some embodiments" or the like in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, however, and can refer to one or more but less than all embodiments. The terms "including", "containing", "having" and variations thereof mean "including but not limited to", unless expressly specified otherwise.

[0058] "Equal / equality" as referred to in this application is not strictly equal / equality, but within an error allowable range. "Vertical" is not strictly vertical, but within an error allowable range.

[0059] In the embodiments of this application, the same reference signs refer to the same component or the same part. In the embodiments of this application, for a plurality of identical parts, only one of the parts may be labeled with a reference sign in the drawings. The reference signs are also applicable to other identical parts or components. In addition, the sizes and dimensions of the parts shown in the drawings are only exemplary.

[0060] The embodiment of this application provides a range-extending power assembly. The range-extending power assembly includes two housings, one of the housings includes two annular grooves arranged in parallel, one of the annular grooves is used for fixing a stator of an electric motor, the other annular groove is used for fixing a stator of a generator, the other side of one of the housings is used for enclosing the other housing to form a reducer accommodating cavity, the reducer accommodating cavity is used for accommodating two parallel shaft reducers arranged in parallel, one of the parallel shaft reducers includes an input shaft, an intermediate shaft and an output shaft, the other parallel shaft reducer includes another input shaft and another output shaft. The outer circumferential surface of one of the housings includes two oil outlets distributed at intervals, the two oil outlets are respectively used for accommodating a blocking piece. The groove wall of each annular groove includes a radial through hole, wherein the radial through hole of one of the annular grooves is respectively used for connecting one of the oil outlets, an internal oil channel of one of the housings, and an internal oil channel of the stator core of the electric motor, the internal oil channel of one of the housings protrudes from one side of one of the housings. The radial through hole of the other annular groove is respectively used for connecting the other oil outlet, the other internal oil channel of one of the housings, and the internal oil channel of the stator core of the generator, the other internal oil channel of one of the housings protrudes from the other side of one of the housings, and the other internal oil channel of one of the housings is in communication with the internal oil channel of one of the housings.

[0061] The oil outlet of each internal oil channel of the shell is arranged on the outer circumferential surface of the shell, the oil outlet of each internal oil channel is blocked by the blocking member, and the radial through holes respectively communicating with the internal oil channel of the stator core of each motor and the internal oil channel of the shell are arranged on the inner groove wall of each annular groove, so that the lubricating oil of each internal oil channel of the shell can be introduced into the internal oil channel of the stator core of each motor, and the stator core of each motor of the range extending power assembly can be cooled and lubricated. In this way, the cooling and lubrication requirements of each motor of the range extending power assembly can be ensured, and the cooling and lubrication system of the range extending power assembly is relatively simple, the processing technology is simple, and the production cost is low.

[0062] In addition, the oil outlet of each internal oil channel of the shell is arranged on the outer circumferential surface of the shell, and each internal oil channel of the shell protrudes from one side of the shell, so that on the basis of ensuring the strength of each internal oil channel of the shell, each internal oil channel of the shell does not affect the layout of other components of the shell, and the space utilization of the shell is improved. Furthermore, the performance of the range extending power assembly is improved.

[0063] The embodiment of the present application also provides a range extending electric vehicle, which will be described in detail below in combination with Fig. 1.

[0064] Fig. 1 is a schematic structural diagram of a range extending electric vehicle provided by the embodiment of the present application. As shown in Fig. 1, the range extending electric vehicle 1 comprises one or more range extending power assemblies 10, a battery pack 20 and wheels 30. The range extending power assembly 10 is configured to receive power supply from the battery pack 20, convert the electric energy into mechanical energy and drive the wheels 30 to rotate.

[0065] The range extending electric vehicle provided by the embodiment of the present application is also called a range extended electric vehicle, or simply REEV.

[0066] The range extending power assembly 10 comprises two motors, an electric motor and a generator. The range extending electric vehicle 1 can be switched between pure electric and range extending modes. When the range extending electric vehicle 1 is in the pure electric mode, the battery pack 20 supplies power to the electric motor to drive the range extending electric vehicle 1. When the battery 20 is low or runs out, the engine can be started to switch the range extending electric vehicle 1 to the range extending mode. When the range extending electric vehicle 1 is in the range extending mode, the engine drives the generator to generate electricity, and the generated electricity can be used to charge the battery 20 or provided to the electric motor.

[0067] The structure of the extended-range power assembly provided by the embodiment of the application will be described in detail below with reference to FIGS. 2-11.

[0068] As shown in FIGS. 2 and 3, the extended-range power assembly 10 includes a first housing 100 and a second housing 200. The other side of the first housing 100 is used to enclose one side of the second housing 200 to form a reducer accommodating cavity for accommodating two parallel-shaft reducers arranged in parallel.

[0069] It should be noted that the parallel arrangement involved in the embodiment of the application can be understood as parallel arrangement in the horizontal direction. The horizontal direction is perpendicular to the direction of gravity. The parallel-shaft reducer can be understood as the shafts of the reducer being arranged in parallel.

[0070] As shown in FIG. 3, the first parallel-shaft reducer includes an input shaft 311, an intermediate shaft 312 and an output shaft 313. The input shaft 311 of the first parallel-shaft reducer passes through a gear 3111 and two bearings 3112-3113, the intermediate shaft 312 of the first parallel-shaft reducer passes through two gears 3121-3122 and two bearings 3123-3124, and the output shaft 313 of the first parallel-shaft reducer passes through a gear 3131 and two bearings (only one of the two bearings 3132 is shown in FIG. 3). The gear 3111 of the input shaft 311 of the first parallel-shaft reducer and the gear 3121 of the intermediate shaft 312 of the first parallel-shaft reducer are engaged with each other to enable the input shaft 311 of the first parallel-shaft reducer to drive the intermediate shaft 312 to rotate. The gear 3122 of the intermediate shaft 312 of the first parallel-shaft reducer and the gear 3131 of the output shaft 313 of the first parallel-shaft reducer are engaged with each other to enable the intermediate shaft 312 of the first parallel-shaft reducer to drive the output shaft 313 to rotate.

[0071] The second parallel-shaft reducer includes an input shaft 321 and an output shaft 322. The input shaft 321 of the second parallel-shaft reducer passes through a gear 3211 and two bearings 3212-3213, and the output shaft 322 of the second parallel-shaft reducer passes through a gear 3221 and two bearings (only one of the two bearings 3222 is shown in FIG. 3). The gear 3211 of the input shaft 321 of the second parallel-shaft reducer and the gear 3221 of the output shaft 322 of the second parallel-shaft reducer are engaged with each other to enable the input shaft 321 of the second parallel-shaft reducer to drive the output shaft 322 to rotate. In turn, the second parallel-shaft reducer reduces the speed of the generator.

[0072] In some embodiments, the range-extending power assembly 10 further comprises a third housing, the third housing is used to enclose one side of the first housing 100 to form a motor accommodating cavity, the motor accommodating cavity is used to accommodate the parallel arranged motor and generator. The motor comprises a motor shaft, a motor stator and a motor rotor, the motor shaft of the motor passes through the shaft hole of the motor rotor of the motor, the motor stator of the motor is sleeved on the motor rotor of the motor, the motor shaft of the motor and the input shaft 311 of the parallel shaft speed reducer are in transmission connection, so as to control the output torque and rotation speed of the motor of the range-extending power assembly 10. The generator comprises a motor shaft, a motor stator and a motor rotor, the motor shaft of the generator passes through the shaft hole of the motor rotor of the generator, the motor stator of the generator is sleeved on the motor rotor of the generator. The motor shaft of the generator and the input shaft 321 of the other parallel shaft speed reducer are in transmission connection, so as to control the output torque and rotation speed of the generator of the range-extending power assembly 10.

[0073] The structure of the first housing 100 will be described in detail below in combination with FIGS. 2-9.

[0074] As shown in FIGS. 2-5, one side of the first housing 100 comprises two annular grooves 111-112 arranged in parallel, the accommodating cavity of one annular groove 111 is used to fix the stator of the motor of the range-extending power assembly 10, and the accommodating cavity of the other annular groove 112 is used to fix the stator of the generator of the range-extending power assembly 10.

[0075] It should be noted that each annular groove protrudes from one side of the first housing 100 away from the other side of the second housing 200.

[0076] As shown in FIG. 6, the other side of the first housing 100 comprises a shaft hole 121. The shaft hole 121 of the first housing 100 is used to respectively communicate the speed reducer accommodating cavity and the accommodating cavity of one annular groove 111, and the shaft hole 121 of the first housing 100 is also used to fix a bearing 3112 of the input shaft 311 of the parallel shaft speed reducer. In addition, the shaft hole 121 of the first housing 100 is also used to fix a bearing of the motor shaft of the motor, and the motor shaft of the motor and the input shaft 311 of the parallel shaft speed reducer are in transmission connection. In this way, the motor shaft of the motor can transmit power to the input shaft 311 of the parallel shaft speed reducer, thereby controlling the output torque and rotation speed of the motor.

[0077] As shown in FIG. 6, the other side of the housing 100 further comprises another shaft hole 122, which is used to communicate the reducer accommodating cavity and the accommodating cavity of the other annular groove 112, and is used to fix a bearing 3212 of an input shaft 321 of the other parallel shaft reducer. In addition, the other shaft hole 122 of the housing 100 is also used to fix a bearing of a motor shaft of the generator, which is in transmission connection with the input shaft 321 of the other parallel shaft reducer. In this way, the motor shaft of the generator can transmit power to the input shaft 321 of the other parallel shaft reducer, so as to control the output torque and rotating speed of the generator.

[0078] As shown in FIG. 6, the other side of the housing 100 further comprises a bearing groove 123 and another bearing groove 124, the bearing groove 123 of the housing 100 is used to fix a bearing 3123 of an intermediate shaft 312 of a parallel shaft reducer, and the other bearing groove 124 of the housing 100 is used to fix a bearing of an output shaft 322 of the other parallel shaft reducer. Among them, the spacing between the bearing groove 123 of the housing 100 and the other shaft hole 122 of the housing 100 is greater than the spacing between the shaft hole 121 of the housing 100 and the other shaft hole 122 of the housing 100, and the spacing between the other bearing groove 124 of the housing 100 and the shaft hole 121 of the housing 100 is less than the spacing between the shaft hole 121 of the housing 100 and the other shaft hole 122 of the housing 100. In other words, the bearing groove 123 of the housing 100 is arranged on the side of the shaft hole 121 of the housing 100 away from the other shaft hole 122 of the housing 100, and the other bearing groove 124 of the housing 100 is arranged on the side of the other shaft hole 122 of the housing 100 close to the shaft hole 121 of the housing 100.

[0079] In some embodiments, in order to make the structure of the range-extending power assembly compact, the outer groove wall of the bearing groove 123 of the housing 100 can be tangent to the hole wall of the shaft hole 121 of the housing 100. Similarly, the other bearing groove 124 of the housing 100 can also be tangent to the hole wall of the other shaft hole 122 of the housing 100.

[0080] As shown in FIG. 6, the other side of the housing 100 further comprises a further shaft hole 125, which is used to communicate the reducer accommodating cavity, and is used to fix a bearing 3132 of an output shaft 313 of a parallel shaft reducer.

[0081] In some embodiments, as shown in FIG. 6, one axial hole 121 of one housing 100 is located higher than the other axial hole 122 of one housing 100 along the direction of gravity. In other words, one axial hole 121 of one housing 100 is located above the other axial hole 122 of one housing 100 along the direction of gravity.

[0082] In some embodiments, the cross-sectional area of each of the two annular grooves 111-112 of one housing 100 is greater than the cross-sectional area of one axial hole 121, the cross-sectional area of the other axial hole 122, the cross-sectional area of one bearing groove 123, the cross-sectional area of the other bearing groove 124, and the cross-sectional area of the further axial hole 125.

[0083] The two sides of one housing 100 are used to set the accommodating cavities of the generator, the accommodating cavities of the motor, and the accommodating cavities of the parallel shaft reducers. In order to improve the space utilization of the internal oil passages of the extended-range power assembly 10, the extended-range power assembly 10 is arranged as follows: the internal oil passages of one housing 100 are arranged protruding from one side of one housing 100. The cross-sectional area of the two annular grooves 111-112 of one side of one housing 100 is greater than that of the accommodating cavities on the other side of one housing 100. Therefore, the internal oil passages of one housing 100 are arranged as much as possible to protrude from the other side of one housing 100, and the oil inlet and outlet of the heat exchanger and the oil inlet and outlet of the filter are arranged on one side of one housing 100. The oil outlets of the internal oil passages of one housing 100 are arranged concentratedly on the outer circumferential surface of one housing 200. The internal oil passages, the oil outlets, the oil inlet of the heat exchanger, the oil outlet of the heat exchanger, and the oil inlet and outlet of the filter on one housing 100 are described in detail below.

[0084] As shown in FIG. 6, one housing 100 includes one internal oil passage 131, one internal oil passage 131 of one housing 100 protrudes from one side of one housing, and the spacing between one internal oil passage 131 of one housing 100 and one axial hole 121 is less than the spacing between one internal oil passage 131 of one housing 100 and the other axial hole 122. In other words, compared with the other axial hole 122 of one housing 100, one internal oil passage 131 of one housing 100 is arranged close to one axial hole 121. In this way, on the basis of ensuring the strength of one internal oil passage 131 of one housing 100, one internal oil passage 131 of one housing 100 does not affect the layout of other components of one housing 100, thereby improving the space utilization of one housing 100. Further, the performance of the extended-range power assembly 10 is improved.

[0085] An inner oil passage 131 of a housing 100 is used to communicate with a shaft hole 121. In this way, the lubricating oil of the inner oil passage 131 of the housing 100 can be introduced into the shaft hole 121, so as to realize the active cooling and lubrication of the gear 3111 and the two bearings 3112-3113 of the input shaft 311 of the parallel shaft reducer connected with the motor.

[0086] In some embodiments, as shown in FIG. 6, the inner hole wall of the shaft hole 121 of the housing 100 includes an oil outlet T 11 , and the inner hole wall of the shaft hole 121 of the housing 100 includes an oil outlet T 11 used to communicate with the inner oil passage 131 of the housing 100. In this way, by machining the oil outlet T 11 communicating with the inner oil passage 131 of the housing 100 on the inner hole wall of the shaft hole 121 of the housing 100, it is possible to introduce the lubricating oil of the inner oil passage 131 of the housing 100 into the shaft hole 121, so as to realize the active cooling and lubrication of the gear 3111 and the two bearings 3112-3113 of the input shaft 311 of the parallel shaft reducer of the range-extending power assembly 10. Further, not only the cooling and lubrication requirements of the gears and bearings of each shaft of the parallel shaft reducer of the range-extending power assembly 10 can be ensured, but also the cooling and lubrication system of the range-extending power assembly 10 can be further simplified, the machining process is simple, and the production cost is low.

[0087] For example, the oil outlet T 11 of the inner hole wall of the shaft hole 121 of the housing 100 communicates with the inner oil passage 131 of the housing 100 through an inner partial oil passage of the housing 100.

[0088] In some embodiments, the cross-sectional area of the oil outlet T 11 of the shaft hole 121 of the housing 100 is smaller than the cross-sectional area of the inner partial oil passage of the housing 100 and the cross-sectional area of the inner oil passage 131 of the housing 100. In this way, after the lubricating oil flows out of the oil outlet T 11 of the shaft hole 121 of the housing 100, it will be slowed down and expanded, like an oil nozzle, so that the lubricating oil can be sprayed into the shaft hole 121 more uniformly. Further, no additional oil nozzles and oil pipes are needed in the range-extending power assembly 10, which further reduces the production cost of the range-extending power assembly 10.

[0089] In some embodiments, the cross-sectional area of the connection between the inner partial oil passage of the housing 100 and the internal oil passage 131 of the housing 100 is smaller than the cross-sectional area of the inner partial oil passage of the housing 100 and the cross-sectional area of the internal oil passage 131 of the housing 100. In this way, the lubricating oil flowing out of the connection between the inner partial oil passage of the housing 100 and the internal oil passage 131 of the housing 100 is slowed down and expanded, like a nozzle, and sprayed into the inner partial oil passage of the housing 100, so that the lubricating oil can be sprayed into the inner partial oil passage of the housing 100 more evenly. Further, the range-extending power assembly 10 does not need to additionally deploy components such as nozzles and oil pipes, further reducing the production cost of the range-extending power assembly 10.

[0090] In some embodiments, the connection between the inner partial oil passage of the housing 100 and the internal oil passage 131 of the housing 100 is higher than the connection between the inner partial oil passage of the housing 100 and the oil outlet T of the shaft hole 121 of the housing 100. In this way, under the action of gravity, the flow speed of the lubricating oil in the inner partial oil passage of the housing 100 can be accelerated. 11

[0091] As shown in FIG. 6, the housing 100 further comprises another internal oil passage 132, and the another internal oil passage 132 of the housing 100 is in communication with the internal oil passage 131 of the housing 100. The another internal oil passage 132 of the housing 100 protrudes from the other side of the housing. The another internal oil passage 1321 of the housing 100 is arranged adjacent to the other shaft hole 122, and the another internal oil passage 132 of the housing 100 is arranged on the side of the other shaft hole 122 away from the other bearing groove 124. In this way, on the basis of ensuring the strength of the another internal oil passage 132 of the housing 100, the another internal oil passage 132 of the housing 100 does not affect the layout of other components of the housing 100, improving the space utilization of the housing 100. Further, the performance of the range-extending power assembly 10 is improved.

[0092] The another internal oil passage 132 of the housing 100 is used to communicate with the other shaft hole 122. In this way, the lubricating oil of the another internal oil passage 132 of the housing 100 can be introduced into the other shaft hole 122, achieving active cooling and lubrication of the gear 3211 and the two bearings 3212-3213 of the input shaft 321 of the other parallel shaft reducer connected in transmission with the generator. Thus, the cooling and lubrication effect of the gears and bearings of the shafts of the other parallel shaft reducer connected in transmission with the engine is improved.

[0093] ​​​​​In some embodiments, the inner hole wall of the other shaft hole 122 of the one housing 100 comprises an oil outlet, and the oil outlet of the inner hole wall of the other shaft hole 122 of the one housing 100 is used to communicate with the other internal oil passage 132 of the one housing 100. In this way, by machining the oil outlet on the inner hole wall of the other shaft hole 122 of the one housing 100 to communicate with the other internal oil passage 132 of the one housing 100, the lubricating oil in the other internal oil passage 132 of the one housing 100 can be introduced into the other shaft hole 122, thereby achieving active cooling and lubrication of the gear 3211 and the two bearings 3212-3213 of the input shaft 321 of the other parallel shaft reducer of the extended-range power assembly 10. In turn, not only can the cooling and lubrication requirements of the gears and bearings of the shafts of the other parallel shaft reducer of the extended-range power assembly 10 be ensured, but the cooling and lubrication system of the extended-range power assembly 10 can be further simplified, the processing technology can be simplified, and the production cost can be reduced.

[0094] In some embodiments, as shown in FIGS. 4, 6, and 8, the inner hole wall of the other shaft hole 122 of the one housing 100 comprises an annular protrusion P1, and the annular protrusion P1 protrudes from the inner hole wall of the other shaft hole 122 of the one housing 100 to the center of the other shaft hole 122 of the one housing 100. The annular protrusion P1 is used to divide the other shaft hole 122 of the one housing 100 into two bearing cavities, one of which is used to fix one bearing of the input shaft 321 of the other parallel shaft reducer, and the other of which is used to fix one bearing of the motor shaft of the generator. In this way, along the axial direction of the input shaft 321 of the other parallel shaft reducer, the annular protrusion P1 can achieve the fixation of one bearing of the input shaft 321 of the other parallel shaft reducer and one bearing of the motor shaft of the generator in the other shaft hole 122 of the one housing 100, further simplifying the processing technology of the extended-range power assembly 10.

[0095] As shown in FIG. 8, the annular protrusion P1 comprises two end faces E1-E2, which are arranged opposite to each other along the axial direction of the input shaft 321 of the other parallel shaft reducer, and each of the two end faces E1-E2 comprises an oil outlet T 12 , and the oil outlet T 12 of each of the two end faces E1-E2 is used to communicate with the other internal oil passage 132 of the one housing 100.

[0096] In this way, by machining the oil outlet T 12This allows lubricating oil from another internal oil passage 132 of the housing 100 to be introduced into the bearing cavity of a bearing on the input shaft 321 of another parallel shaft reducer and the bearing cavity of a bearing on the motor shaft of the generator, thereby actively cooling and lubricating the gears and bearings of each shaft of the other parallel shaft reducer of the range extender powertrain 10 and the gears and bearings of the generator motor shaft. On the one hand, this ensures the cooling and lubrication needs of the gears and bearings of each shaft of the other parallel shaft reducer of the range extender powertrain 10 and the gears and bearings of the generator motor shaft are met. On the other hand, it further simplifies the cooling and lubrication system of the range extender powertrain 10 and simplifies the manufacturing process. Furthermore, the range extender powertrain 10 does not require additional components such as fuel injectors and oil guide pipes, further reducing the production cost of the range extender powertrain 10.

[0097] In some embodiments, the oil outlet T of at least one of the two end faces E1 to E2 12 The oil outlet T on each end face is connected to the inner circumferential surface of the annular protrusion P1. 12 The cross-sectional area is smaller than the cross-sectional area of ​​another internal oil passage 132 of a housing 100. Thus, the oil outlet T of one end face E1... 12 It can limit the flow of lubricating oil to one bearing cavity, preventing excessive lubricating oil from flowing into that cavity. The oil outlet T on the other end face E1... 12 It can limit the flow of lubricating oil to another bearing cavity, preventing excessive lubricating oil from flowing to the other bearing cavity.

[0098] In some embodiments, as shown in Figures 7 and 8, another parallel-shaft reducer further includes a bearing sleeve 140, which is used to accommodate one of two bearing cavities, each bearing cavity fixing a bearing via the bearing sleeve 140. As shown in Figure 9, one end face 141 of the bearing sleeve 140 includes a groove G, which is recessed from one end face 141 of the bearing sleeve 140 toward a side opposite to one end face 141 of the bearing sleeve 140. The groove G is used to fix a bearing 3212 of the input shaft 321 of the other parallel-shaft reducer or a bearing of the motor shaft of a generator. The bottom of the bearing receiving groove G includes a through hole 142, which extends through the bottom of the bearing receiving groove G along the axial direction of the input shaft 321 of the other parallel-shaft reducer. The through hole 142 at the bottom of the bearing receiving groove G is used to connect to another internal oil passage 132 of a housing 100. In this way, by machining through holes 142 at the bottom of the groove of the bearing sleeve 140, it is possible to introduce the lubricating oil from another internal oil passage 132 of a housing 100 into the bearing cavity of a bearing on the input shaft 321 of another parallel shaft reducer and the bearing cavity of a bearing on the motor shaft of a generator.

[0099] In some embodiments, the cross-sectional area of the through hole 142 of the groove bottom of the bearing accommodating groove G is smaller than the cross-sectional area of the other internal oil passage 132 of the housing 100. In this way, the lubricating oil flowing out of the through hole 142 of the groove bottom of the bearing accommodating groove G will be slowed down and expanded, like an oil nozzle, and sprayed into the shaft hole, so that the lubricating oil can be sprayed into each bearing cavity more uniformly. Further, the range extending power assembly 10 does not need to additionally deploy components such as oil nozzles and oil pipes, further reducing the production cost of the range extending power assembly 10.

[0100] In some embodiments, the through hole 142 of the groove bottom of the bearing accommodating groove G is communicated with the inner circumferential surface of the bearing accommodating groove G towards one end of the groove opening. In this way, one end of the through hole 142 of the groove bottom of the bearing accommodating groove G can flow limiting the lubricating oil flowing to the bearing of the input shaft 321 of the other parallel shaft reducer or the bearing of the motor shaft of the generator, avoiding excessive lubricating oil flowing to the bearing of the input shaft 321 of the other parallel shaft reducer or the bearing of the motor shaft of the generator.

[0101] In some embodiments, the outer circumferential surface of the bearing sleeve 140 comprises a plurality of annular protrusions, and the inner wall of each bearing cavity comprises a plurality of grooves, and the plurality of grooves of each bearing cavity are used to accommodate the plurality of annular protrusions of the bearing sleeve 140, realizing the fixed connection of the bearing sleeve 140 and the bearing cavity. Exemplarily, the fixed connection of each bearing cavity and the bearing sleeve 140 can be realized by a casting process.

[0102] In some embodiments, the oil outlet of the inner hole wall of the other shaft hole 122 of the housing 100 is communicated with the other internal oil passage 132 of the housing 100 through the other internal partial oil passage of the housing 100.

[0103] In some embodiments, the cross-sectional area of the oil outlet of the inner hole wall of the other shaft hole 122 of the housing 100 is smaller than the cross-sectional area of the other internal partial oil passage of the housing 100 and the cross-sectional area of the other internal oil passage 132 of the housing 100. In this way, the lubricating oil flowing out of the oil outlet of the other shaft hole 122 of the housing 100 will be slowed down and expanded, like an oil nozzle, and sprayed into the other shaft hole 122, so that the lubricating oil can be sprayed into the other shaft hole 122 more uniformly. Further, the range extending power assembly 10 does not need to additionally deploy components such as oil nozzles and oil pipes, further reducing the production cost of the range extending power assembly 10.

[0104] In some embodiments, the cross-sectional area of the connection between the other inner partial oil passage of the housing 100 and the other inner oil passage 132 of the housing 100 is smaller than the cross-sectional area of the other inner partial oil passage of the housing 100 and the cross-sectional area of the other inner oil passage 132 of the housing 100. In this way, the lubricating oil flowing out of the connection between the other inner partial oil passage of the housing 100 and the other inner oil passage 132 of the housing 100 is slowed down and expanded, like a nozzle, and sprayed into the other inner partial oil passage of the housing 100, so that the lubricating oil can be sprayed into the other inner partial oil passage of the housing 100 more evenly. In turn, the range-extending power assembly 10 does not need to additionally deploy components such as nozzles and oil pipes, further reducing the production cost of the range-extending power assembly 10.

[0105] In some embodiments, the connection between the other inner partial oil passage of the housing 100 and the other inner oil passage 132 of the housing 100 is higher than the connection between the other inner partial oil passage of the housing 100 and the oil outlet of the inner hole wall of the other shaft hole 122 of the housing 100. In this way, under the action of gravity, the flow speed of the lubricating oil in the other inner partial oil passage of the housing 100 can be accelerated.

[0106] As shown in FIG. 6, the housing 100 further includes a further inner oil passage 133, and the further inner oil passage 133 of the housing 100 is in communication with the inner oil passage 131 and the other inner oil passage 132 of the housing 100, respectively. The further inner oil passage 133 of the housing 100 protrudes from one side of the housing. The further inner oil passage 133 of the housing 100 is arranged between the bearing groove 123 and the other bearing groove 124, and the spacing between the further inner oil passage 133 of the housing 100 and the bearing groove 123 is greater than the spacing between the further inner oil passage 133 of the housing 100 and the other bearing groove 124. In other words, compared to the bearing groove 123 of the housing 100, the further inner oil passage 133 of the housing 100 is arranged close to the other bearing groove 124. In this way, on the basis of ensuring the strength of the further inner oil passage 133 of the housing 100, the further inner oil passage 133 of the housing 100 does not affect the layout of other components of the housing 100, improving the space utilization of the housing 100. In turn, the performance of the range-extending power assembly 10 is improved.

[0107] Another internal oil passage 133 of a housing 100 is used to communicate with another bearing groove 124. In this way, the lubricating oil of another internal oil passage 133 of a housing 100 can be introduced into another bearing groove 124, so as to realize active cooling and lubrication of the gear 3211 and two bearings of the output shaft 322 of another parallel shaft reducer connected with the generator. Thus, the cooling and lubrication effect of the gear and bearings of each shaft of another parallel shaft reducer connected with the generator is improved.

[0108] In some embodiments, as shown in FIG. 6, the inner groove wall of another bearing groove 124 of a housing 100 includes an oil outlet T 13 , the inner groove wall of another bearing groove 124 of a housing 100 includes an oil outlet T 13 used to communicate with another internal oil passage 133 of a housing 100. In this way, by machining an oil outlet T 13 communicating with another internal oil passage 133 of a housing 100 on the inner hole wall of another bearing groove 124 of a housing 100, it is possible to introduce the lubricating oil of another internal oil passage 133 of a housing 100 into another bearing groove 124, so as to realize active cooling and lubrication of the gear 3211 and two bearings of the output shaft 322 of another parallel shaft reducer of the range-extending powertrain 10. Further, not only the cooling and lubrication requirements of the gear and bearings of each shaft of another parallel shaft reducer of the range-extending powertrain 10 can be ensured, but also the cooling and lubrication system of the range-extending powertrain 10 can be further simplified, the machining process is simple, and the production cost is low.

[0109] For example, as shown in FIG. 6, the oil outlet T 13 of the inner hole wall of another bearing groove 124 of a housing 100 communicates with another internal oil passage 133 of a housing 100 through another internal oil distribution passage 134 of a housing 100. Another internal oil distribution passage 134 of a housing 100 protrudes from another side of a housing 100.

[0110] In some embodiments, the cross-sectional area of the oil outlet T 13 of another bearing groove 124 of a housing 100 is smaller than the cross-sectional area of another internal oil distribution passage 134 of a housing 100 and the cross-sectional area of another internal oil passage 133 of a housing 100. In this way, after the lubricating oil flows out of the oil outlet T 13 of another bearing groove 124 of a housing 100, it will be slowed down and expanded, like an oil nozzle, and sprayed into another bearing groove 124, so that the lubricating oil can be sprayed into another bearing groove 124 more uniformly. Further, no additional components such as oil nozzles and oil pipes need to be arranged in the range-extending powertrain 10, which further reduces the production cost of the range-extending powertrain 10.

[0111] In some embodiments, the cross-sectional area of the connection between the inner partial oil passage 134 of the housing 100 and the inner oil passage 133 of the housing 100 is smaller than the cross-sectional area of the inner partial oil passage 134 of the housing 100 and the cross-sectional area of the inner oil passage 133 of the housing 100. In this way, the lubricating oil flowing out of the connection between the inner partial oil passage 134 of the housing 100 and the inner oil passage 133 of the housing 100 is slowed down and expanded, like a nozzle, and sprayed into the inner partial oil passage 134 of the housing 100, so that the lubricating oil can be uniformly sprayed into the inner partial oil passage 134 of the housing 100. In turn, the range-extending power assembly 10 does not need to additionally deploy a nozzle and an oil guide pipe and other components, further reducing the production cost of the range-extending power assembly 10.

[0112] In some embodiments, the connection between the inner partial oil passage 134 of the housing 100 and the inner oil passage 133 of the housing 100 is higher than the connection between the inner partial oil passage 134 of the housing 100 and the oil outlet T of the other bearing groove 124 of the housing 100. In this way, under the action of gravity, the flow speed of the lubricating oil in the inner partial oil passage 134 of the housing 100 can be accelerated. 13

[0113] As shown in FIG. 4, the outer circumferential surface of the housing 100 includes three oil outlets O1-O3 distributed at intervals, and each oil outlet of the outer circumferential surface of the housing 100 is used to accommodate a blocking piece. One oil outlet O1 of the housing 100 is used to communicate with one inner oil passage 131 of the housing 100, another oil outlet O2 of the housing 100 is used to communicate with another inner oil passage 132 of the housing 100, and the other oil outlet O3 of the housing 100 is used to communicate with the other inner oil passage 133 of the housing 100.

[0114] It should be understood that one oil outlet O1 of the housing 100 is an oil outlet of one inner oil passage 131 of the housing 100. Another oil outlet O2 of the housing 100 is an oil outlet of another inner oil passage 132 of the housing 100. The other oil outlet O3 of the housing 100 is an oil outlet of the other inner oil passage 133 of the housing 100.

[0115] The oil outlets of the various inner oil passages of the housing 100 are concentrated on the outer circumferential surface of the housing 200. On the one hand, the machining process of the various inner oil passages of the housing 100 can be simplified, and on the other hand, the deployment of the components on both sides of the housing 100 can be saved space, improving the space utilization of the housing 100. In turn, the performance of the range-extending power assembly 10 is improved. ​

[0116] In some embodiments, as shown in FIG. 6, the other side of the housing 100 further comprises a protrusion P2, the protrusion P2 of the housing 100 extends from the internal oil passage 131 of the housing 100 towards the other housing. The side of the protrusion P2 of the housing 100 away from the other side of the housing 100 comprises an oil outlet T 14 of the protrusion P2 of the housing 100 is used to communicate with the internal oil passage 131 of the housing 100. In this way, the lubricating oil in the internal oil passage 131 of the housing 100 can be introduced into other components through the oil outlet T 14 of the protrusion P2 of the housing 100. 14 This further makes the cooling and lubricating system of the extended-range powertrain 10 simpler, the machining process simpler, and the production cost lower.

[0117] In some embodiments, as shown in FIG. 6, the other side of the housing 100 further comprises another protrusion P3, the other protrusion P3 of the housing 100 extends from the other internal oil passage 132 of the housing 100 towards the other housing. The other protrusion P3 of the housing 100 away from the other side of the housing 100 comprises an oil outlet T 15 of the other protrusion P3 of the housing 100, as shown in FIG. 11, is used to communicate with the other internal oil passage 132 of the housing 100. In this way, the lubricating oil in the other internal oil passage 132 of the housing 100 can be introduced into other components through the oil outlet T 15 of the other protrusion P3 of the housing 100. 15 This further makes the cooling and lubricating system of the extended-range powertrain 10 simpler, the machining process simpler, and the production cost lower.

[0118] In some embodiments, as shown in FIG. 6, the other side of the housing 100 further comprises still another protrusion P4, the still another protrusion P4 of the housing 100 is distributed between the two bearing grooves 123-124, and the spacing between the still another protrusion P4 and the bearing groove 123 is greater than the spacing between the still another protrusion P4 and the other bearing groove 124. The side of the still another protrusion P4 of the housing 100 away from the other side of the housing 100 comprises an oil outlet T 16 of the still another protrusion P4 of the housing 100 is used to communicate with the internal oil passage 131 of the housing 100, the other internal oil passage 133 of the housing 100, respectively. The oil outlet T 16 of the still another protrusion P4 of the housing 100 is used to spray oil through the oil nozzle. 16

[0119] ​Since the other internal oil passage 133 of the housing 100 is arranged close to the other bearing groove 124 of the two bearing grooves 123-124, in order to avoid arranging an excessively long oil passage to introduce lubricating oil into the one bearing groove 123, the other protrusion P4 of the housing 100 is arranged at the connection between the one internal oil passage 131 of the housing 100 and the other internal oil passage 133 of the housing 100. In this way, the oil outlet T 16 of the other protrusion P4 can spray lubricating oil to the bearings and gears of the intermediate shaft 312 and the output shaft 313 of the parallel shaft speed reducer, so as to realize active cooling and lubrication of the gears and bearings of the intermediate shaft 312 and the output shaft 313 of the parallel shaft speed reducer. Thus, the cooling and lubrication effects of the gears and bearings of the shafts of the parallel shaft speed reducer are improved.

[0120] As shown in FIGS. 2-6, the housing 100 further comprises an oil pump accommodating groove 150 for fixing an oil pump, the oil pump accommodating groove 150 is arranged adjacent to the other annular groove 112, and the groove opening of the oil pump accommodating groove 150 faces away from the other internal oil passage 133 of the housing 100.

[0121] Since the two sides of the housing 100 are provided with internal oil passages and accommodating cavities of the generator, the motor and the parallel shaft speed reducers, the oil pump accommodating groove 150 is arranged on the outer circumferential surface of the housing, so as to improve the space utilization of the housing 100. Further, the performance of the extended-range powertrain 10 is improved.

[0122] In some embodiments, as shown in FIGS. 2-4, the groove wall of the oil pump accommodating groove 150 comprises a through hole T 21 , and the through hole T 21 of the groove wall of the oil pump accommodating groove 150 is used to communicate with the oil inlet of the heat exchanger. One side of the housing 100 further comprises a further protrusion P5, and the protrusion P5 comprises a through hole T 22 facing away from the side surface of the one side of the housing 100, and the through hole T 22 of the protrusion P5 is used to communicate the other internal oil passage 133 of the housing 100 with the oil outlet of the heat exchanger.

[0123] Since the one side of the housing 100 is provided with only one internal oil passage and accommodating cavities of the generator, the motor and the parallel shaft speed reducers, compared with the other side of the housing 100, the setting space of the one side of the housing 100 is more sufficient, so the oil inlet of the heat exchanger and the oil outlet of the heat exchanger are both arranged on the one side of the housing 100, so as to improve the space utilization of the housing 100. Further, the performance of the extended-range powertrain 10 is improved.

[0124] In some embodiments, as shown in FIG. 4, the one side of the housing 100 further comprises an oil outlet T23 and the oil inlet T of one side of the shell 100 24 and the oil outlet T of one side of the shell 100 23 for connecting the other internal oil passage 133 of the shell 100 with the oil inlet of the oil filter, the oil inlet T of one side of the shell 100 24 for connecting the other internal oil passage 133 of the shell 100 with the oil outlet of the oil filter. The oil outlet T of one side of the shell 100 is far from the other oil outlet O3 of the shell 100 23 the through hole T of the other protrusion P5 is closer to the connection of the other internal oil passage 133 of the shell 100 22 the through hole T of the other protrusion P5 is far from the connection of the other internal oil passage 133 of the shell 100, the oil inlet T of one side of the shell 100 24 the through hole T of the other protrusion P5 is closer to the connection of the other internal oil passage 133 of the shell 100, the oil outlet T of one side of the shell 100 23 the through hole T of the other protrusion P5 is far from the connection of the other internal oil passage 133 of the shell 100. The oil filter is used to filter the lubricating oil from the heat exchanger, so as to avoid impurities entering the circulation path of the lubricating oil and ensure the stable operation of the extended-range power assembly 10.

[0125] As shown in FIG. 5, the groove wall of the annular groove 111 includes radial through holes T 31 The radial through holes T of the annular groove 111 31 are respectively used for connecting the oil outlet O1 of the shell 100, the internal oil passage 131 of the shell 100, and the internal oil passage of the stator core of the motor. In this way, the lubricating oil of the internal oil passage 131 of the shell 100 can be introduced into the internal oil passage of the stator core of the motor, so as to cool and lubricate the stator core of the motor of the extended-range power assembly 10. In this way, not only the cooling and lubrication requirements of the motor of the extended-range power assembly 10 can be ensured, but also the cooling and lubrication system of the extended-range power assembly 10 can be relatively simple, the processing technology is simple, and the production cost is low.

[0126] In some embodiments, as shown in FIG. 4, the annular groove 111 includes an end face 1111 away from one side of the shell 100, and the end face 1111 of the annular groove 111 includes axial through holes T 32 The axial through holes T of the end face 1111 of the annular groove 111 32 are used for accommodating a blocking piece. The axial through holes T of the annular groove 111 32 are used for connecting the radial through holes T of the annular groove 111 31 with the internal oil passage 131 of the shell 100. In other words, the radial through holes T of the annular groove 111 31The axial through hole T of the end surface 1111 of the annular groove 111 32 The internal oil passage 131 of the shell 100.

[0127] In this way, by machining the axial through hole T and the radial through hole T respectively communicated with the internal oil passage 131 of the shell 100 and the radial through hole T of the annular groove 111 on the end surface 1111 of the annular groove 111 away from one side of the shell 100 31 The axial through hole T of the end surface 1111 of the annular groove 111 32 And plugging the axial through hole T with a plugging piece 32 It is possible to realize that the lubricating oil in the internal oil passage 131 of the shell 100 is completely introduced into the internal oil passage of the stator core of the motor. In this way, it is possible to further make the cooling and lubricating system of the extended-range powertrain 10 simple, low in processing cost.

[0128] In some embodiments, the cross-sectional area of the axial through hole T of the annular groove 111 32 The cross-sectional area of the radial through hole T of the annular groove 111 31 Respectively less than the cross-sectional area of the internal oil passage 131 of the shell 100. In this way, compared with the internal oil passage 131 of the shell 100, the flow rate of the lubricating oil in the axial through hole T 32 The radial through hole T 31 of the annular groove 111 is faster, which improves the efficiency of the lubricating oil in cooling and lubricating the stator core of the motor of the extended-range powertrain 10.

[0129] As shown in FIGS. 5 and 11, the groove wall of the other annular groove 112 includes a radial through hole T 33 The radial through hole T of the other annular groove 112 33 Respectively used to communicate the other oil outlet O2 of the shell 100, the other internal oil passage 132 of the shell 100, and the internal oil passage of the stator core of the generator. In this way, it is possible to realize that the lubricating oil of the other internal oil passage 132 of the shell 100 is introduced into the internal oil passage of the stator core of the generator, and the stator core of the generator of the extended-range powertrain 10 is cooled and lubricated. In this way, not only can the cooling and lubrication requirements of the motor of the extended-range powertrain 10 be guaranteed, but also the cooling and lubricating system of the extended-range powertrain 10 can be simple, the processing technology is simple, and the production cost is low.

[0130] In some embodiments, as shown in FIG. 4, the other annular groove 112 includes an end surface 1121 away from one side of the shell 100, and the end surface 1121 of the other annular groove 112 includes an axial through hole T 34 The axial through hole T of the end surface 1121 of the other annular groove 112 34Used to accommodate a sealing element. Another annular groove 112 has an axial through-hole T. 32 The radial through hole T is used to connect to another annular groove 112. 33 With another internal oil passage 132 of the housing 100. In other words, the radial through hole T of another annular groove 112. 33 Through the axial through hole T of another annular groove 112 34 Another internal oil passage 132 connects to a housing 100.

[0131] Thus, by machining radial through holes T on the end face 1121 of another annular groove 112 opposite to one housing 100, respectively connecting to another internal oil passage 132 of one housing 100 and another annular groove 112, 33 Continuous axial through hole T 34 And seal the axial through hole T with a sealing component. 34 This allows the lubricating oil in another internal oil passage 132 of the housing 100 to be completely introduced into the internal oil passage of the generator stator core. This further simplifies the cooling and lubrication system of the range-extended powertrain 10 and reduces manufacturing costs.

[0132] In some embodiments, the axial through hole T of another annular groove 112 34 The cross-sectional area of ​​the other annular groove 112 and the radial through hole T 33 The cross-sectional areas of the two are smaller than the cross-sectional area of ​​the other internal oil passage 132 of the housing 100. Thus, compared to the other internal oil passage 132 of the housing 100, the axial through-hole T of the other annular groove 112... 34 Radial through hole T 33 The faster flow rate of the lubricating oil inside improves the efficiency of the lubricating oil in cooling and lubricating the stator core of the electric motor of the range-extended powertrain 10.

[0133] The structure of another housing 200 will be described in detail below with reference to Figure 10.

[0134] As shown in Figure 10, one side of the other housing 200 includes a bearing groove 211. This bearing groove 211 connects to the reducer housing cavity and also serves to fix another bearing 3113 of the input shaft 311 of a parallel shaft reducer. Thus, support for both ends of the input shaft 311 of a parallel shaft reducer can be achieved through a shaft hole 121 in one housing 100 and a bearing groove 211 in the other housing 200.

[0135] As shown in Figure 10, another bearing groove 212 is also included on one side of the other housing 200. The other bearing groove 212 of the other housing 200 is used to connect to the reducer housing cavity, and the other bearing groove 212 of the other housing 200 is also used to fix another bearing 3213 of the input shaft 321 of the other parallel shaft reducer. In this way, the two ends of the input shaft 321 of the other parallel shaft reducer can be supported through the other shaft hole 122 of one housing 100 and the other bearing groove 212 of the other housing 200.

[0136] As shown in Figure 10, another bearing groove 213 is also included on one side of the other housing 200. This other bearing groove 213 of the other housing 200 is used to connect to the reducer housing cavity, and it is also used to fix another bearing 3124 of the intermediate shaft 312 of the parallel shaft reducer. In this way, the two ends of the intermediate shaft 312 of the parallel shaft reducer can be supported by one bearing groove 123 of one housing 100 and another bearing groove 213 of the other housing 200.

[0137] As shown in Figure 10, one side of the other housing 200 also includes a shaft hole 214. The shaft hole 214 of the other housing 200 is used to connect to the reducer housing cavity, and the shaft hole 214 of the other housing 200 is also used to fix another bearing of the output shaft 322 of the other parallel shaft reducer. In this way, the two ends of the output shaft 322 of the other parallel shaft reducer can be supported through the other bearing groove 124 of the housing 100 and the shaft hole 214 of the other housing 200.

[0138] As shown in Figure 10, the distance between another bearing groove 213 of another housing 200 and another bearing groove 212 of another housing 200 is greater than the distance between one bearing groove 211 of another housing 200 and another bearing groove 212 of another housing 200, and the distance between one shaft hole 214 of another housing 200 and one bearing groove 211 of another housing 200 is less than the distance between one bearing groove 211 of another housing 200 and another bearing groove 212 of another housing 200. In other words, another bearing groove 213 of another housing 200 is arranged on the side of one bearing groove 211 of another housing 200 away from the other bearing groove 212 of another housing 200, and one shaft hole 214 of another housing 200 is arranged on the side of another bearing groove 212 of another housing 200 close to the other bearing groove 211 of another housing 200.

[0139] In some embodiments, to make the range-extended powertrain more compact, the outer wall of another bearing groove 213 of another housing 200 may be tangent to the bore wall of a bearing groove 211 of another housing 200. Similarly, a shaft hole 214 of another housing 200 may also be tangent to the bore wall of another bearing groove 212 of another housing 200.

[0140] As shown in Figure 10, another housing 200 also includes another shaft hole 215 on one side. This other shaft hole 215 of the other housing 200 is used to connect to the reducer housing cavity, and it is also used to fix another bearing of the output shaft 313 of a parallel shaft reducer. In this way, the two ends of the output shaft 313 of a parallel shaft reducer can be supported through another shaft hole 125 of one housing 100 and another shaft hole 215 of the other housing 200.

[0141] In some embodiments, as shown in FIG10, one side of the other housing 200 further includes a protrusion P6, which is arranged in a bearing groove 211 of the other housing 200. The side of the other housing 200 facing the housing 100 includes an oil outlet T. 41 Another housing 200 has a protrusion P6 with an oil outlet T. 41 An axial oil passage for connecting the input shaft 311 of a parallel shaft reducer.

[0142] In this way, the oil outlet T of a protrusion P6 on another housing 200 can be connected. 41 The outflowing lubricating oil is introduced into the axial oil passage of the input shaft 311 of a parallel shaft reducer to cool the rotor of the motor that is connected to the axial oil passage of the input shaft 311 of the parallel shaft reducer. This further simplifies the cooling and lubrication system of the range extender powertrain 10, making the processing technology simple and the production cost low.

[0143] In some embodiments, as shown in FIG10, another housing 200 also includes an oil inlet T on one side. 42 Another housing 200 has an oil inlet T 42 Each is used to connect the oil outlet T of a protrusion P6. 41 An internal oil passage 131 in a housing 100, and an oil inlet T in a housing 200. 42 It is arranged adjacent to a bearing groove 211 of another housing 200.

[0144] Since a bearing groove 211 on one side of another housing 200 and a shaft hole 121 on the other side of housing 100 are used to support the two ends of the input shaft of the same parallel shaft reducer, a protrusion P6 of one housing 200 is disposed in a bearing groove 211, and a shaft hole 121 of one housing 100 is disposed adjacent to an internal oil passage 131 of one housing 100, therefore, an oil inlet T of the other housing 200 is... 42 They are positioned close to a bearing groove 211, which, on the one hand, reduces the size of the oil outlet T of a protrusion P6 on the other housing 200. 41 With another housing 200, there is an oil inlet T 42 The length of the connecting oil passage can thus reduce the weight of the range-extender powertrain 10. On the other hand, the size of one of the oil inlet ports T of the other housing 200 can be reduced. 42 The length of the oil passage communicating with an internal oil passage 131 of a housing 100 can reduce the volume of the range-extended powertrain 10.

[0145] In some embodiments, another housing 200 has an oil inlet T 42 Oil outlet T through a protrusion P2 of a housing 100 14 It communicates with an internal oil passage 131 of a housing 100. Thus, an oil inlet T of another housing 200... 42 Oil outlet T through a protrusion P2 of a housing 100 14 Lubricating oil in an internal oil passage 131 of a housing 100 is introduced into another housing 200.

[0146] In some embodiments, another housing 200 has an oil inlet T 42 Through an internal oil passage of another housing 200 and an oil outlet T of a protrusion P6 of another housing 200. 41 Connected. In one case, an internal oil passage of the other housing 200 protrudes from the other side of the other housing 200. Thus, an oil inlet T of the other housing 200... 42 An oil inlet T of another housing 200 is connected through an internal oil passage of the other housing 200. 42 The lubricating oil is introduced into the outlet port T of a protrusion P6 on another housing 200. 41 .

[0147] In some embodiments, the outer peripheral surface of another housing 200 includes an oil outlet T. 51 Another oil outlet T on the outer peripheral surface of the casing 200 51 For accommodating a sealing element, an oil outlet T is located on the outer peripheral surface of another housing 200. 51One oil inlet T is used to connect to another housing 200. 42 Another housing 200 has an internal oil passage.

[0148] It should be understood that another housing 200 has an oil outlet T. 51 An oil outlet for an internal oil passage of another housing 200.

[0149] By placing the oil outlet of one of the internal oil passages of the other housing 200 on the outer peripheral surface of the other housing 200, the machining process of each internal oil passage of the other housing 200 can be simplified. On the other hand, it can save space for the deployment of the components on both sides of the other housing 200, thereby improving the space utilization of the other housing 200. In turn, the performance of the range-extended powertrain 10 is improved.

[0150] In some embodiments, as shown in FIG10, another protrusion P7 is further included on one side of the other housing 200, and the other protrusion P7 of the other housing 200 is arranged in another bearing groove 212 of the other housing 200. The other protrusion P7 of the other housing 200 includes an oil outlet T on the side facing one housing 100. 43 Another protrusion P7 on the other housing 200 has an oil outlet T. 43 An axial oil passage for connecting the input shaft 321 of another parallel shaft reducer.

[0151] In this way, the oil outlet T of the other protrusion P7 of the other housing 200 can be connected. 43 The outflowing lubricating oil is introduced into the axial oil passage of the input shaft 321 of another parallel shaft reducer, thereby cooling the rotor of the motor that is connected to the axial oil passage of the input shaft 321 of the other parallel shaft reducer. This further simplifies the cooling and lubrication system of the range-extended powertrain 10, making the processing technology simpler and the production cost lower.

[0152] In some embodiments, as shown in FIG10, another oil inlet T is also included on one side of another housing 200. 44 Another oil inlet T of the other housing 200 44 Each is used to connect to the oil outlet T of another protrusion P7. 43 Another internal oil passage 132 of one housing 100, and another oil inlet T of another housing 200. 44 It is arranged adjacent to another bearing groove 212 of another housing 200.

[0153] Since another bearing groove 212 on one side of another housing 200 and another shaft hole 122 on the other side of housing 100 are used to support the two ends of the input shaft of the same parallel shaft reducer, another protrusion P7 of one housing 200 is disposed in another bearing groove 212, and another shaft hole 122 of one housing 100 is disposed adjacent to another internal oil passage 132 of one housing 100, therefore, another oil inlet T of the other housing 200 is... 44 It is positioned close to another bearing groove 212, which, on the one hand, reduces the oil outlet T of another protrusion P7 of the other housing 200. 43 With another oil inlet T of another housing 200 44 The length of the connected oil passage can thus reduce the weight of the range-extender powertrain 10. On the other hand, the size of another oil inlet T in the other housing 200 can be reduced. 44 The length of the oil passage communicating with another internal oil passage 132 of a housing 100 can reduce the volume of the range-extended powertrain 10.

[0154] In some embodiments, another oil inlet T of another housing 200 44 Oil outlet T through another protrusion P3 of a housing 100 15 It communicates with another internal oil passage 132 of one housing 100. Thus, another oil inlet T of the other housing 200... 44 Oil outlet T through another protrusion P3 of a housing 100 15 Lubricating oil from another internal oil passage 132 of one housing 100 is introduced into another housing 200.

[0155] In some embodiments, another oil inlet T of another housing 200 44 Through another internal oil passage of another housing 200 and the oil outlet T of another protrusion P7 of another housing 200. 43 Connected. Thus, another oil inlet T of the other housing 200... 44 The other oil inlet T of the other housing 200 is connected through another internal oil passage of the other housing 200. 44 The lubricating oil is introduced into the outlet port T of another protrusion P7 of another housing 200. 43 .

[0156] In some embodiments, the outer peripheral surface of another housing 200 includes another oil outlet T. 52 Another oil outlet T on the outer circumferential surface of the other housing 200 52 Another outlet T on the outer peripheral surface of another housing 200 is used to accommodate a sealing element. 52 Another oil inlet T, respectively used to connect to another housing 20044 Another internal oil passage in another housing 200.

[0157] It should be understood that another oil outlet T of the other housing 200 52 An oil outlet for another internal oil passage of another housing 200.

[0158] By placing the oil outlet of another internal oil passage of the other housing 200 on the outer peripheral surface of the other housing 200, the machining process of each internal oil passage of the other housing 200 can be simplified. On the other hand, it can save space for the deployment of the components on both sides of the other housing 200, thereby improving the space utilization of the other housing 200. In turn, the performance of the range-extended powertrain 10 is improved.

[0159] The range-extended powertrain 10 provided in this application embodiment firstly allows lubricating oil in the oil pump to pass through the through hole T in the wall of the oil pump receiving tank 150. 21 The lubricating oil enters the heat exchanger, where it is cooled. The cooled lubricating oil then passes through a through-hole T with a protrusion P5. 22 The lubricating oil flows into another internal oil passage 133 of the housing 100. Next, the lubricating oil in the other internal oil passage 133 of the housing 100 exits through the oil outlet T on one side of the housing 100. 23 The lubricating oil flows into the oil filter, which filters the lubricating oil and then passes the filtered lubricating oil through the oil inlet T on one side of a housing 100. 24 The lubricating oil flows into another internal oil passage 133 of a housing 100. Again, as shown in Figure 6, a portion of the lubricating oil in another internal oil passage 133 of a housing 100 flows into another bearing groove 124 of a housing 100 through another internal branching oil passage 134, while another portion of the lubricating oil flows through the oil outlet T of another protrusion P4. 16 The oil is sprayed from the nozzle, and a portion of the lubricating oil flows in two streams. One stream flows into an internal oil passage 131 of the housing 100, and the other stream flows into another internal oil passage 132 of the housing 100. Finally, a portion of the lubricating oil in the internal oil passage 131 of the housing 100 passes through the axial through-hole T of an annular groove 111. 32 Radial through hole T 31 The lubricating oil flows into the internal oil passages of the stator core of the motor, while another portion of the lubricating oil exits through an oil outlet T on a protrusion P2 of a housing 100. 14 Another housing 200 has an oil inlet T. 42 An internal oil passage in another housing 200, and an oil outlet T of a protrusion P6 in another housing 200. 41The oil flows into the axial passage of the input shaft 311 of a parallel shaft reducer. As shown in Figure 11, a portion of the lubricating oil in another internal oil passage 132 of a housing 100 passes through the axial through-hole T of another annular groove 112. 34 Radial through hole T 33 The oil flows into the internal oil passages of the engine's stator core, while another portion of the lubricating oil exits through the oil outlet T of another protrusion P3 on a housing 100. 15 Another oil inlet T of the other housing 200 44 Another internal oil passage of another housing 200, and another oil outlet T of another protrusion P7 of another housing 200. 43 The oil flows into the axial passage of the input shaft 321 of another parallel shaft reducer. This completes the cooling and lubrication of the range-extended powertrain 10.

[0160] It should be noted that the axial direction of the range-extended powertrain 10 can also be understood as the axial direction of an electric motor, the axial direction of a generator, or the axial direction of a parallel shaft reducer. Specifically, the axial direction of an electric motor refers to the axial direction of the motor shaft of the electric motor, the axial direction of a generator refers to the axial direction of the motor shaft of the generator, and the axial direction of the parallel shaft reducer refers to the axial direction of each shaft of the parallel shaft reducer.

[0161] For example, the types of lubricating oils involved in the embodiments of this application include, but are not limited to, ethylene glycol-based cooling oils, synthetic oils, and mineral oils. Furthermore, lubricating oil can also be referred to as cooling oil.

[0162] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A range-extended powertrain, characterized in that, The range-extended powertrain includes two housings. One housing has two parallel annular grooves on one side. One annular groove is used to fix the stator of the electric motor, and the other annular groove is used to fix the stator of the generator. The other side of the first housing encloses the second housing to form a reducer housing cavity. The reducer housing cavity is used to accommodate two parallel-shaft reducers. One parallel-shaft reducer includes an input shaft, an intermediate shaft, and an output shaft. The other parallel-shaft reducer includes another input shaft and another output shaft. The outer circumferential surface of the first housing includes two spaced-apart oil outlets, each of which is used to accommodate a sealing element. The groove wall of each annular groove includes a radial through hole, wherein: A radial through hole in the annular groove is used to connect an oil outlet, an internal oil passage in the housing, and an internal oil passage in the stator core of the motor. The internal oil passage in the housing protrudes from one side of the housing. A radial through hole in the other annular groove is used to connect the other oil outlet, the other internal oil passage of the housing, and the internal oil passage of the stator core of the generator. The other internal oil passage of the housing protrudes from the other side of the housing and is connected to the first internal oil passage of the housing.

2. The range-extended powertrain according to claim 1, characterized in that, Each of the annular grooves includes an end face facing away from the housing, and each end face of the annular groove includes an axial through hole for receiving a sealing element, wherein: An axial through hole in the annular groove is used to connect a radial through hole in the annular groove with an internal oil passage in the housing. An axial through-hole of the other annular groove is used to connect a radial through-hole of the other annular groove to another internal oil passage of the housing.

3. The range-extended powertrain according to claim 2, characterized in that, The cross-sectional area of ​​an axial through hole and a radial through hole of the annular groove are respectively smaller than the cross-sectional area of ​​an internal oil passage of the housing. The cross-sectional area of ​​an axial through hole and a radial through hole of the other annular groove are respectively smaller than the cross-sectional area of ​​another internal oil passage of the housing.

4. The range-extended powertrain according to any one of claims 1 to 3, characterized in that, The other side of the housing also includes two shaft holes. One shaft hole is used to connect the reducer housing cavity and the annular groove and a bearing for fixing the input shaft, respectively. The other shaft hole is used to connect the reducer housing cavity and the other annular groove and a bearing for fixing the other input shaft. The distance between an internal oil passage of the housing and the shaft hole is less than the distance between an internal oil passage of the housing and the other shaft hole, and the internal oil passage of the housing is used to connect to the shaft hole. Another internal oil passage of the housing is arranged adjacent to the other shaft hole, and the other internal oil passage of the housing is used to connect to the other shaft hole.

5. The range-extended powertrain according to claim 4, characterized in that, The inner wall of the shaft hole includes an oil outlet, which is used to connect to an internal oil passage of the housing. The cross-sectional area of ​​the oil outlet is smaller than the cross-sectional area of ​​the internal oil passage of the housing.

6. The range-extended powertrain according to claim 4 or 5, characterized in that, The inner wall of the other shaft hole includes an annular protrusion that divides the other shaft hole into two bearing cavities. One bearing cavity is used to fix a bearing of the other input shaft, and the other bearing cavity is used to fix a bearing of the generator's motor shaft, wherein: The annular protrusion includes two end faces arranged opposite each other along the axial direction of the other input shaft, each end face including an oil outlet, and one oil outlet of each end face being used to connect to another internal oil passage of the housing.

7. The range-extended powertrain according to claim 6, characterized in that, At least one oil outlet of the end face is in communication with the inner circumferential surface of the annular protrusion; The cross-sectional area of ​​an oil outlet on each of the end faces is smaller than the cross-sectional area of ​​another internal oil passage in the housing.

8. The range-extended powertrain according to any one of claims 1 to 7, characterized in that, The other side of the housing also includes two protrusions, each of which has an oil outlet on its side facing away from the other side of the housing, wherein: One of the protrusions extends from an internal oil passage of one housing toward the other housing, and an oil outlet of the protrusion is used to connect to an internal oil passage of the one housing; The other protrusion extends from another internal oil passage of one housing toward the other housing, and an oil outlet of the other protrusion is used to connect to another internal oil passage of one housing.

9. The range-extended powertrain according to any one of claims 1 to 8, characterized in that, The other side of the housing also includes two bearing slots, one bearing slot for fixing a bearing on the intermediate shaft, and the other bearing slot for fixing a bearing on the other output shaft, wherein: The inner wall of the other bearing groove includes an oil outlet, which is used to connect to another internal oil passage of the housing. The distance between the other internal oil passage of the housing and the bearing groove is greater than the distance between the other internal oil passage of the housing and the other bearing groove. The other internal oil passage of the housing protrudes from the other side of the housing.

10. The range-extended powertrain according to claim 9, characterized in that, The cross-sectional area of ​​an oil outlet on the inner wall of the other bearing groove is smaller than the cross-sectional area of ​​another internal oil passage in the housing.

11. The range-extended powertrain according to claim 9 or 10, characterized in that, The other side of one of the housings also includes another protrusion, which is distributed between the two bearing grooves. The distance between the second protrusion and one bearing groove is greater than the distance between the second protrusion and the other bearing groove, wherein: The other protrusion has an oil outlet on the side opposite to the other housing. The oil outlet of the other protrusion is used to connect to an internal oil passage of the housing and another internal oil passage of the housing. The oil outlet of the other protrusion is used to spray oil through a fuel injector.

12. The range-extended powertrain according to any one of claims 1 to 11, characterized in that, The housing includes an oil pump receiving groove for fixing an oil pump. The oil pump receiving groove is arranged adjacent to another annular groove. The opening of the oil pump receiving groove is away from another internal oil passage of the housing. The groove wall of the oil pump receiving groove includes a through hole for connecting to the oil inlet of the heat exchanger. One side of the housing also includes another protrusion, and the side of the other protrusion opposite to the side of the housing includes a through hole. The through hole of the other protrusion is used to connect another internal oil passage of the housing to the oil outlet of the heat exchanger.

13. The range-extended powertrain according to any one of claims 1 to 12, characterized in that, One side of the other housing also includes: The other two bearing slots, each of the other two bearing slots, are used to connect to the reducer housing cavity, one of the other two bearing slots is used to fix the other bearing of the one input shaft, and the other of the other two bearing slots is used to fix the other bearing of the other input shaft; The other two protrusions, each of which is arranged in one of the other two bearing grooves, each of which has an oil outlet on its side facing the housing, one of the protrusions having an oil outlet for connecting to the axial oil passage of the input shaft, and the other of the protrusions having an oil outlet for connecting to the axial oil passage of the other input shaft.

14. The range-extended powertrain according to claim 13, characterized in that, One side of the other housing also includes two oil inlet holes. One oil inlet hole is used to connect an oil outlet of one of the other two protrusions to an internal oil passage of the housing. The other oil inlet hole is used to connect an oil outlet of the other protrusion to another internal oil passage of the housing. One of the oil inlets is arranged adjacent to one of the other two bearing slots, and the other oil inlet is arranged adjacent to the other bearing slot of the other two bearing slots.

15. A range-extended electric vehicle, characterized in that, The range-extended electric vehicle includes wheels, a battery pack, and a range-extended powertrain as claimed in any one of claims 1 to 14, the range-extended powertrain being used to receive power from the battery pack and drive the wheels.

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