Oil pump assembly, engine, hybrid powertrain, and vehicle

Abstract

An oil pump assembly, an engine, a hybrid powertrain, and a vehicle. The oil pump assembly comprises: an oil feed pump and an oil return pump. An oil feed cavity is formed in the oil feed pump; the oil return pump is connected to the oil feed pump, and the oil return pump comprises an oil return pump housing and an oil return pump shaft. The oil return pump shaft is disposed in the oil return pump housing, and a lubricating oil passage is formed in the oil return pump housing. The lubricating oil passage is in communication with the oil feed cavity, and the lubricating oil passage has at least one lubricating oil port for discharging oil towards the oil return pump shaft.

Description

Oil pump assembly, engine, hybrid assembly and vehicle

[0001] This application claims priority to Chinese Patent Application No. 202411090827.6, filed on August 08, 2024, the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of vehicles, and in particular to an oil pump assembly, an engine, a hybrid assembly and a vehicle. BACKGROUND

[0003] In mechanical equipment, an oil pump can deliver lubricating oil from a lubricating oil tank to a lubricating point to provide necessary lubrication and cooling for the operation of the mechanical equipment, reduce the friction and wear of mechanical parts, and prolong the service life of the mechanical equipment. For example, an oil pump in a vehicle can pump pressurized lubricating oil to various components (such as bearings) to lubricate the components in the vehicle. SUMMARY

[0004] The present disclosure provides an oil pump assembly that can guide the oil in the oil supply pump to the oil return pump shaft inside the oil return pump, thereby accelerating the circulation speed and cooling effect of the oil, and further improving the lubrication effect on the oil return pump shaft.

[0005] In a first aspect, an oil pump assembly is provided. The oil pump assembly includes: an oil supply pump and an oil return pump. The oil supply pump forms an oil supply cavity; the oil return pump is connected with the oil supply pump, and the oil return pump includes an oil return pump shell and an oil return pump shaft. The oil return pump shaft is arranged in the oil return pump shell, and the oil return pump shell forms a lubricating oil channel. The lubricating oil channel is in communication with the oil supply cavity, and the lubricating oil channel has at least one lubricating oil port that discharges oil towards the oil return pump shaft.

[0006] Thus, by providing the oil pump assembly, the oil in the oil supply pump can be guided to the oil return pump shaft inside the oil return pump, thereby accelerating the circulation speed and cooling effect of the oil, and further improving the lubrication effect on the oil return pump shaft, prolonging the service life of the oil pump assembly.

[0007] In some embodiments, the oil return pump shaft includes: a first rotating shaft and a second rotating shaft. The second rotating shaft is in transmission cooperation with the first rotating shaft through at least one set of meshing gears. The at least one lubricating oil port includes a plurality of lubricating oil ports, a portion of the plurality of lubricating oil ports discharging oil towards the first rotating shaft, and another portion of the plurality of lubricating oil ports discharging oil towards the second rotating shaft.

[0008] In some embodiments, the first rotating shaft is a driving shaft, and the second rotating shaft is a driven shaft. The plurality of lubricating oil ports include at least one first lubricating oil port and at least one second lubricating oil port. The at least one first lubricating oil port is arranged to discharge lubricating oil towards the driving shaft, and the at least one second lubricating oil port is arranged to discharge lubricating oil towards the driven shaft.

[0009] In some embodiments, the lubricating oil passage includes a first branch oil passage and a second branch oil passage. The first branch oil passage is provided with the at least one first lubricating oil port, and the second branch oil passage is provided with the at least one second lubricating oil port. The lubricating oil passage satisfies at least one of the following conditions: the first branch oil passage includes a plurality of oil passage segments arranged in an axial direction of the first rotating shaft to define an avoiding space; or the second branch oil passage includes a plurality of oil passage segments arranged in an axial direction of the second rotating shaft to define the avoiding space.

[0010] In some embodiments, the driving shaft includes a first driving shaft and a second driving shaft connected in sequence along a length direction of the driving shaft. The at least one first lubricating oil port includes a plurality of first lubricating oil ports arranged to discharge lubricating oil towards the first driving shaft and the second driving shaft, respectively.

[0011] In some embodiments, both ends of the first driving shaft and both ends of the second driving shaft are provided with a first bearing corresponding to the at least one first lubricating oil port.

[0012] In some embodiments, both ends of the first driving shaft and both ends of the second driving shaft are provided with a first ring groove matched with the first bearing.

[0013] In some embodiments, the lubricating oil passage includes a main oil passage, a first branch oil passage and a second branch oil passage. The main oil passage is in communication with the oil supply cavity. The first branch oil passage is in communication with the main oil passage and is provided with the at least one first lubricating oil port. The second branch oil passage is in communication with the main oil passage and is provided with the at least one second lubricating oil port.

[0014] In some embodiments, the lubricating oil passage further includes a first sub-oil passage. The main oil passage is connected to a midpoint of the first sub-oil passage, and the first branch oil passage and the second branch oil passage are respectively connected to two ends of the first sub-oil passage.

[0015] In some embodiments, the first sub-oil passage is configured as an arc shape with a low middle and high ends.

[0016] In some embodiments, the lubricating oil passage further comprises a third branch oil passage. The third branch oil passage is in communication with the first branch oil passage and is arranged in a length direction of the driven shaft and spaced apart from the second branch oil passage. The third branch oil passage is provided with the at least one second lubricating oil outlet.

[0017] In some embodiments, the driven shaft comprises a first driven shaft and a second driven shaft connected in sequence in a length direction of the driven shaft. The second lubricating oil outlet of the second branch oil passage is arranged to discharge lubricating oil towards the first driven shaft. The at least one second lubricating oil outlet of the third branch oil passage is arranged to discharge lubricating oil towards the second driven shaft.

[0018] In some embodiments, both ends of the first driven shaft and both ends of the second driven shaft are provided with second bearings. The second lubricating oil outlet of the second branch oil passage is arranged to discharge lubricating oil towards the second bearing at one end of the first driven shaft. The at least one second lubricating oil outlet of the third branch oil passage comprises at least three second lubricating oil outlets arranged to discharge lubricating oil towards the second bearings at the other end of the first driven shaft and at both ends of the second driven shaft, respectively.

[0019] In some embodiments, both ends of the first driven shaft and both ends of the second driven shaft are provided with second ring grooves matched with the second bearings.

[0020] In some embodiments, the lubricating oil passage further comprises a second branch oil passage. The second branch oil passage is in communication with the first branch oil passage and the third branch oil passage, respectively. The first branch oil passage and the third branch oil passage are connected to two ends of the second branch oil passage, respectively.

[0021] In some embodiments, the second branch oil passage is configured in an arc shape with a low middle and high ends.

[0022] In some embodiments, the lubricating oil passage comprises a main oil passage, a first branch oil passage and a second branch oil passage. The main oil passage is in communication with the oil supply cavity. The first branch oil passage is in communication with the main oil passage and is provided with the at least one first lubricating oil outlet. The second branch oil passage is in communication with the first branch oil passage and is provided with the at least one second lubricating oil outlet. The main oil passage, the first branch oil passage and the second branch oil passage are connected in sequence.

[0023] In some embodiments, the lubricating oil passage comprises a main oil passage, a first branch oil passage and a second branch oil passage. The main oil passage is in communication with the oil supply cavity. The first branch oil passage is in communication with the main oil passage and is provided with the at least one first lubricating oil outlet. The second branch oil passage is in communication with the main oil passage and is provided with the at least one second lubricating oil outlet. The first branch oil passage and the second branch oil passage are connected in parallel on the main oil passage.

[0024] In some embodiments, the oil supply pump comprises an oil supply pump shaft, and the driving shaft is connected with the oil supply pump shaft.

[0025] In some embodiments, the oil supply pump comprises an oil supply pump shaft, and the driving shaft is integrally arranged with the oil supply pump shaft.

[0026] In some embodiments, the oil return pump housing comprises a pump body and a pump cover. The pump cover is arranged on a side of the pump body away from the oil supply pump, and the lubricating oil passage is formed in the pump body and the pump cover.

[0027] In some embodiments, the lubricating oil passage is provided with a pump body outlet on the pump body and a pump cover inlet on the pump cover. The pump body outlet and the pump cover inlet are in communication, and the cross-sectional area of the pump body outlet is greater than that of the pump cover inlet.

[0028] In some embodiments, the bottom of the oil supply cavity is provided with an oil supply outlet in communication with the lubricating oil passage.

[0029] In a second aspect, an engine is provided. The engine comprises the oil pump assembly described above.

[0030] In a third aspect, a hybrid assembly is provided. The hybrid assembly comprises the engine described above.

[0031] In some embodiments, the hybrid assembly further comprises an electric machine assembly. The engine is located above the electric machine assembly, and the engine comprises a machine body and an oil pan, and the oil pan is located between the machine body and the electric machine assembly. The oil pump assembly is arranged in the oil pan. The oil return pump shaft comprises a driving shaft and a driven shaft, and the driving shaft and the driven shaft are arranged in a horizontal direction.

[0032] In a fourth aspect, a vehicle is provided. The vehicle comprises the hybrid assembly described above.

[0033] Additional aspects and advantages of the present disclosure will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0034] The aspects and advantages of the foregoing or additional aspects and advantages of the present disclosure will become apparent in light of the following detailed description considered in conjunction with the accompanying drawings, in which:

[0035] FIG. 1 is a partial structural view of an oil pump assembly according to some embodiments;

[0036] FIG. 2 is another partial structural view of an oil pump assembly according to some embodiments;

[0037] FIG. 3 is a structural diagram of a lubricating oil passage of an oil pump assembly according to some embodiments;

[0038] FIG. 4 is another structural diagram of a lubricating oil passage of an oil pump assembly according to some embodiments;

[0039] FIG. 5 is yet another structural diagram of a lubricating oil passage of an oil pump assembly according to some embodiments;

[0040] FIG. 6 is yet another structural diagram of a lubricating oil passage of an oil pump assembly according to some embodiments;

[0041] FIG. 7 is a structural diagram of an oil supply pump according to some embodiments;

[0042] FIG. 8 is a block diagram of an engine according to some embodiments;

[0043] FIG. 9 is a block diagram of a hybrid assembly according to some embodiments;

[0044] FIG. 10 is a block diagram of a vehicle according to some embodiments.

[0045] Reference Signs: 3000, vehicle; 2000, hybrid assembly; 1000, engine; 100, oil pump assembly; 1, oil supply pump; 11, oil supply chamber; 12, oil supply pump shaft; 13, oil sump; 2, oil return pump; 21, oil return pump housing; 211, lubricating oil passage; 2111, first lubricating oil port; 2112, second lubricating oil port; 2112, main oil passage; 2113, first branch oil passage; 2114, second branch oil passage; 2115, first sub oil passage; 2116, third branch oil passage; 2117, second sub oil passage; 212, pump body; 2121, pump body outlet; 2131, pump cover inlet; 2132, pump cover outlet; 214, flange face; 22, oil return pump shaft; 221, driving shaft; 2211, first driving shaft; 2212, second driving shaft; 2213, first ring groove; 222, driven shaft; 2221, first driven shaft; 2222, second driven shaft; 2223, second ring groove. DETAILED DESCRIPTION

[0046] Embodiments of the present disclosure are described in detail below with reference to the attached drawing figures, which are exemplary embodiments of the present disclosure. Embodiments of the present disclosure are described in detail below with reference to the attached drawing figures.

[0047] In the related art, the system of the main lubricating bearing in the oil pump needs to provide power for the lubricating oil pump by the motor to pump oil, so as to realize the lubricating bearing effect. However, in this design, there is a problem that the motor power is insufficient or the power line fails to lubricate the bearing, thereby affecting the working efficiency and service life of the oil pump. Moreover, the arrangement form of the lubricating oil channel designed inside the rotor shaft assembly also has the problem that the temperature of the rotor wall rises after the rotor rotates at high speed, thereby causing the temperature of the lubricating oil to be in a high-temperature working condition for a long time, causing the lubricating oil to deteriorate rapidly and affecting the lubricating effect of the lubricating oil on the bearing, thereby reducing the service life of the oil pump.

[0048] To this end, some embodiments of the present disclosure provide an oil pump assembly 100.

[0049] The oil pump assembly 100 according to some embodiments of the present disclosure is described below with reference to FIGS. 1-7. The oil pump assembly 100 can guide the oil in the oil supply pump 1 to the oil return pump shaft 22 inside the oil return pump 2, thereby accelerating the circulation speed and cooling effect of the oil, and thereby improving the lubricating effect on the oil return pump shaft 22.

[0050] As shown in FIGS. 1-7, the oil pump assembly 100 according to some embodiments of the present disclosure mainly includes an oil supply pump 1 and an oil return pump 2. The oil supply pump 1 (such as a gear pump) is used to pump out and pressurize the oil in the oil tank, and then deliver it to the hydraulic system to provide sufficient pressure and flow to lubricate various moving parts in the engine, such as pistons, crankshafts, camshafts, etc. The oil return pump 2 is used to collect the oil in the engine and deliver it back to the oil tank or oil sump for recirculation. In this process, the oil return pump 2 can also have a filtering function to remove impurities in the oil, keep the oil clean, and extend the service life of the system. In summary, through the cooperative work of the two, the lubricating oil in the engine can be ensured to circulate efficiently and reliably.

[0051] In some examples, the oil supply pump 1 is formed with an oil supply cavity 11, and the oil return pump 2 is connected with the oil supply pump 1. The oil return pump 2 includes an oil return pump shell 21 and an oil return pump shaft 22, and the oil return pump shaft 22 is arranged in the oil return pump shell 21. The oil return pump shell 21 is formed with a lubricating oil channel 211, the lubricating oil channel 211 is in communication with the oil supply cavity 11, and the lubricating oil channel 211 has a lubricating oil outlet 2111 facing the oil return pump shaft 22. For example, one oil supply pump 1 is connected in series with four oil return pumps 2.

[0052] For example, the oil supply pump 1 is provided with an oil supply cavity 11 for storing oil, and the oil return pump 2 is in driving connection with the oil supply pump 1. The oil return pump shell 21 can protect the internal structure of the oil return pump 2 from external interference, thereby ensuring the normal working stability of the internal structure of the oil return pump 2. The oil supply cavity 11 is a high-pressure cavity of the oil supply pump 1. For example, the oil supply cavity 11 is an output oil cavity of the oil supply pump 1, and the oil in the oil supply cavity is pressurized. In this way, the oil in the oil supply cavity 11 can be continuously and stably delivered to the lubricating oil channel 211 under the action of the pressure difference, thereby ensuring the lubrication effect.

[0053] In addition, the oil return pump shaft 22 can transmit external power to the internal related structure (such as gears, vanes or rotors, etc.), so that the moving parts can rotate and generate suction force. That is, the oil return pump shaft 22 drives the rotation of the rotors, gears or vanes inside the oil return pump 2, and these moving parts form a negative pressure area in the shell to suck in oil and press the oil on the other side to make the oil return to the oil tank or oil pan, thereby driving the oil flow. The oil return pump shaft 22 can also serve as a support structure for mounting bearings and other rotating parts (such as seals), thereby ensuring that these parts are correctly aligned and work stably.

[0054] The oil return pump shell 21 is provided with a lubricating oil channel 211 in communication with the oil supply cavity 11, and the oil supply pump 1 has high oil pumping pressure. In this way, the speed of the oil flowing from the oil supply cavity 11 to the lubricating oil channel 211 and then to the oil return pump shaft 22 can be increased, thereby ensuring the lubrication requirement of the oil return pump shaft 22.

[0055] In some embodiments, the oil supply cavity 11 can be directly communicated with the lubricating oil channel 211, so that the oil is directly delivered from the oil supply cavity 11 to the lubricating oil channel 211 and then returned. Alternatively, the oil supply cavity 11 can be indirectly communicated with the lubricating oil channel 211. For example, when the oil supply cavity 11 is communicated with the main oil channel of the engine, a branch flow channel is provided on the main oil channel to communicate with the lubricating oil channel 211, so that the oil can be delivered from the main oil channel to the lubricating oil channel 211 and then returned. A plurality of other branch flow channels are also provided on the main oil channel of the engine, and the other branch flow channels are communicated with the moving parts to lubricate the moving parts.

[0056] In addition, in some embodiments of the present disclosure, the oil with high oil pressure in the oil supply pump 1 is used to flow to the oil return pump shaft 22 for lubrication. In this way, on the one hand, the circulation speed of the oil can be increased, thereby improving the lubrication efficiency of the oil return pump shaft 22. On the other hand, the problem of lubrication stagnation or untimely lubrication of the oil return pump shaft 22 can be avoided, thereby ensuring the continuity and stability of the lubrication work, and prolonging the service life of the oil return pump shaft 22 and the working efficiency of the oil return pump 2.

[0057] Therefore, by arranging the oil pump assembly 100, the oil pump assembly 100 can guide the oil in the oil supply pump 1 to the oil return pump shaft 22 inside the oil return pump 2, thereby accelerating the circulation speed and cooling effect of the oil, and further improving the lubrication effect on the oil return pump shaft 22, thereby prolonging the service life of the oil pump assembly 100.

[0058] In some embodiments, as shown in FIGS. 2-6, the oil return pump shaft 22 includes a first rotating shaft and a second rotating shaft, and the second rotating shaft is in driving cooperation with the first rotating shaft through at least one set of meshing gears. The lubricating oil channel 211 has a plurality of lubricating oil ports 2111, a part of which is arranged to discharge oil towards the first rotating shaft, and another part of which is arranged to discharge oil towards the second rotating shaft.

[0059] The first rotating shaft and the second rotating shaft are in driving cooperation through gear meshing, so that power transmission can be achieved, and mechanical energy generated by the driving force can be converted into pressure energy of fluid.

[0060] In addition, a part of the lubricating oil ports 2111 on the lubricating oil channel 211 are arranged to discharge oil towards the first rotating shaft, and another part of the lubricating oil ports 2111 are arranged to discharge oil towards the second rotating shaft. In this way, it can be ensured that the first rotating shaft and the second rotating shaft can be lubricated by oil during operation, thereby improving the uniformity of lubrication of the first rotating shaft and the second rotating shaft, avoiding the risk of uneven wear caused by uneven lubrication on the two shafts, and further ensuring the working stability of the oil return pump 2.

[0061] In some embodiments, the oil return pump shaft 22 is internally provided with a hollow axial oil channel, one end of which is in communication with the lubricating oil channel 211. The outer surface of the oil return pump shaft 22 is provided with a radial oil channel in communication with the axial oil channel. The oil enters the axial oil channel from the lubricating oil channel 211, and flows out to the position of the oil return pump shaft that needs to be lubricated, such as the bearing position supporting the oil return pump shaft 22, through the radial oil channel. In this way, by arranging the axial oil channel inside the oil return pump shaft 22, the oil channel structure of the oil return pump housing 21 can be simplified, and the machining difficulty of the oil return pump housing 21 is reduced.

[0062] In some embodiments, as shown in FIGS. 2-6, the first rotating shaft is a driving shaft 221, and the second rotating shaft is a driven shaft 222. The lubricating oil channel 211 has a plurality of lubricating oil ports 2111, and the plurality of lubricating oil ports 2111 include first lubricating oil ports 21111 and second lubricating oil ports 21112. The first lubricating oil ports 21111 are arranged to discharge oil towards the driving shaft 221, and the second lubricating oil ports 21112 are arranged to discharge oil towards the driven shaft 222.

[0063] The oil return pump 2 of some embodiments of the present disclosure can be an externally meshing gear pump, a driving gear is arranged on the driving shaft 221, a driven gear is arranged on the driven shaft 222, the driving gear and the driven gear are arranged in the same oil return cavity, and the driving gear and the driven gear are meshed with each other. The driving shaft 221 is connected to an external power source, for example, in transmission connection with an output shaft of an electric motor or in transmission connection with an output shaft of an engine. The driven shaft 222 rotates under the transmission of the meshing gears, and the rotation of the gears can also drive the oil to flow to return the oil. In some embodiments of the present disclosure, by arranging the first lubricating oil port 21111 and the second lubricating oil port 21112, the oil return pump 2 of some embodiments of the present disclosure can be applied to an externally meshing gear pump in which the driving shaft 221 and the driven shaft 222 both need to be lubricated.

[0064] In some embodiments, a plurality of driving gears are arranged on the driving shaft 221, and the plurality of driving gears are sequentially and spaced apart along the axial direction of the driving shaft 221. A plurality of driven gears are also arranged on the driven shaft 222, and the plurality of driven gears are sequentially and spaced apart along the axial direction of the driven shaft 222, so that the oil return pump 2 can form a plurality of oil return cavities, so that the oil return pump 2 can actively return oil from a plurality of positions of the engine. The driving shaft 221 directly receives the rotational power transmitted by the electric motor or the engine and transmits the power to the inside of the oil return pump 2; the driven shaft 222 cooperates with the driving shaft 221 inside the oil return pump 2, and the driven shaft 222 indirectly receives the rotational power through another gear (such as a driven gear) meshed with a gear (such as a driving gear) on the driving shaft 221. In summary, the driving shaft 221 is the source of power, responsible for driving the entire operation of the oil return pump 2; and the driven shaft 222 is driven by the driving shaft 221 to cooperate with the driving shaft 221 to perform the function of transporting fluid by the oil return pump 2. The two work together to ensure that the oil return pump 2 can effectively complete the oil return task of the oil return pump 2 in the hydraulic system.

[0065] In addition, the first lubricating oil port 21111 and the second lubricating oil port 21112 on the lubricating oil channel 211 are respectively directed towards the driving shaft 221 and the driven shaft 222. In this way, it can be ensured that the driving shaft 221 and the driven shaft 222 can be lubricated by oil during operation, thereby improving the uniformity of lubrication of the driving shaft 221 and the driven shaft 222, avoiding the risk of large wear differences caused by uneven lubrication on the two shafts, and thereby ensuring the working stability of the oil return pump 2.

[0066] It should be noted that in some embodiments, the oil return pump shaft 22 can be only the first rotating shaft, and the lubricating oil port 2111 is directed towards the first rotating shaft to discharge oil. In this embodiment, the oil return pump 2 can also be an internally meshing gear pump, a centrifugal pump, a piston pump, or other pumps that only need one rotating shaft. In this way, in some embodiments of the present disclosure, the lubricating oil channel 211 can provide lubrication for various forms of oil return pumps.

[0067] In some embodiments, as shown in FIGS. 3-5, the lubricating oil passage 211 includes a first branch oil passage 2113 and a second branch oil passage 2114, the first branch oil passage 2113 is provided with a first lubricating oil port 21111, and the second branch oil passage 2114 is provided with a second lubricating oil port 21112.

[0068] It can be understood that the oil can be divided into the first branch oil passage 2113 and the second branch oil passage 2114, and the first branch oil passage 2113 and the second branch oil passage 2114 can guide the flow direction and path of the oil, so as to realize the effect of flowing the oil to the designated position, thereby improving the accuracy of the lubricating position.

[0069] The first branch oil passage 2113 includes a plurality of oil passage segments spaced apart along the axial direction of the first rotating shaft to define an avoidance space; or the second branch oil passage 2114 includes a plurality of oil passage segments spaced apart along the axial direction of the second rotating shaft to define an avoidance space; or the first branch oil passage 2113 and the second branch oil passage 2114 both include a plurality of oil passage segments spaced apart along the axial direction to define an avoidance space.

[0070] That is, in the extension direction of the first branch oil passage 2113, there is a part of the area on the oil return pump shell 21 that cannot be provided with an oil passage. For example, the outer side of the oil return pump shell 21 at this position is provided with other structures such as an engine body, a crankshaft, etc., and the oil return pump shell 21 needs to avoid these components, resulting in a shell structure area with a thin wall thickness that cannot be provided with an oil passage; for another example, the oil return pump shell 21 is internally provided with other oil passages, in order to avoid interference between the lubricating oil passage 211 and the other oil passages, the oil return pump shell 21 has a part of the area that cannot be provided with the lubricating oil passage 211. Therefore, in some embodiments of the present disclosure, no oil passage is needed to be provided in such area, on the one hand, the relevant structure can be avoided, on the other hand, the space arrangement rationality can be improved.

[0071] In some embodiments, as shown in FIGS. 2-6, the driving shaft 221 includes a first driving shaft 2211 and a second driving shaft 2212 connected in sequence along the length direction (such as the axial direction) of the driving shaft 221. The lubricating oil passage 211 has a plurality of first lubricating oil ports 21111, and the plurality of first lubricating oil ports 21111 respectively discharge oil towards the first driving shaft 2211 and the second driving shaft 2212.

[0072] It can be understood that the first driving shaft 2211 and the second driving shaft 2212 are connected in sequence along the axial direction, and the plurality of first lubricating oil ports 21111 are respectively arranged to discharge oil towards the first driving shaft 2211 and the second driving shaft 2212. In this way, the oil can be discharged and circulated more quickly, thereby efficiently lubricating the joint between the first driving shaft 2211 and the second driving shaft 2212. In addition, the first driving shaft 2211 and the second driving shaft 2212 can be lubricated during operation, thereby improving the uniformity of lubrication of the first driving shaft 2211 and the second driving shaft 2212, avoiding the risk of uneven lubrication causing a large difference in wear between the first driving shaft 2211 and the second driving shaft 2212, and thereby ensuring the normal working stability of the oil return pump 2. In addition, when the oil return pump 2 needs to be provided with a plurality of oil return chambers, a plurality of driving gears are often connected in series on the driving shaft 221, resulting in a long length of the driving shaft 221, which causes difficulties in production, processing and assembly. In some embodiments of the present disclosure, the driving shaft 221 is provided in a multi-segment structure, which can effectively avoid the problem of difficulty in production, processing and assembly caused by the excessive length of the driving shaft 221.

[0073] In some embodiments, as shown in FIGS. 2-6, the two ends of the first driving shaft 2211 and the two ends of the second driving shaft 2212 are each provided with a first bearing, and each first bearing corresponds to at least one first lubricating oil port 21111. The first bearing can support the first driving shaft 2211 and the second driving shaft 2212, ensuring that the first driving shaft 2211 and the second driving shaft 2212 can rotate smoothly and accurately, thereby improving the working stability and durability of the oil return pump 2. In addition, when the oil return pump 2 needs to be provided with a plurality of oil return chambers, resulting in a long length of the driving shaft 221, some embodiments of the present disclosure can provide support for the long driving shaft 221 at multiple positions, ensuring the strength and smooth movement of the driving shaft 221.

[0074] In addition, each first bearing corresponds to at least one first lubricating oil port 21111, so that the lubricating oil in the oil supply chamber 11 can be introduced to the first bearing, thereby effectively improving the lubrication effect at the first bearing, reducing the wear at the connection between the first bearing and the first driving shaft 2211 and the second driving shaft 2212, and thereby ensuring the working stability and reliability of the oil return pump shaft 22.

[0075] In some embodiments, as shown in FIGS. 2-6, the two ends of the first driving shaft 2211 and the two ends of the second driving shaft 2212 are each provided with a first ring groove 2213 matched with the first bearing.

[0076] It can be understood that the first bearing and the first annular groove 2213 can establish an axial limiting fit relationship, so that the position stability of the first bearing can be ensured, and the oil can flow along the first annular groove 2213, thereby fully lubricating the joint of the first bearing, the first driving shaft 2211 and the second driving shaft 2212. Moreover, the first annular groove 2213 can limit the oil from spreading to the outside of the first annular groove 2213 along the axial direction, so that the oil can more uniformly lubricate the joint of the first bearing, the first driving shaft 2211 and the second driving shaft 2212, thereby improving the lubrication uniformity and lubrication efficiency of the oil pump shaft 22. In addition, the first annular groove 2213 can also accelerate the heat dissipation effect of the oil.

[0077] In some embodiments, as shown in FIGS. 3 and 6, the lubricating oil passage 211 includes a main oil passage 2112, a first branch oil passage 2113 and a second branch oil passage 2114. The main oil passage 2112 communicates with the oil supply cavity 11, the first branch oil passage 2113 communicates with the main oil passage 2112, and the first branch oil passage 2113 is provided with a first lubricating oil port 21111. The second branch oil passage 2114 communicates with the main oil passage 2112, and the second branch oil passage 2114 is provided with a second lubricating oil port 21112.

[0078] It can be understood that, by arranging the first branch oil passage 2113 and the second branch oil passage 2114, the oil flowing from the oil supply cavity 11 to the main oil passage 2112 can be guided to flow into the first branch oil passage 2113 and the second branch oil passage 2114, respectively. And the oil can flow to the driving shaft 221 and the driven shaft 222 along the first lubricating oil port 21111 of the first branch oil passage 2113 and the second lubricating oil port 21112 of the second branch oil passage 2114, respectively. In this way, the oil outlet position of the driving shaft 221 and the driven shaft 222 in the axial direction can be increased, the lubrication uniformity of the driving shaft 221 and the driven shaft 222 can be improved, and the situation of insufficient lubrication of the driving shaft 221 or the driven shaft 222 can be avoided, thereby ensuring the working stability of the oil pump 2.

[0079] It should be noted that, in some embodiments of the present disclosure, the first branch oil passage 2113 communicates with the main oil passage 2112, which includes the case where the first branch oil passage 2113 directly communicates with the main oil passage 2112, and the case where the first branch oil passage 2113 indirectly communicates with the main oil passage 2112 through other oil passages. Similarly, the second branch oil passage 2114 communicates with the main oil passage 2112, which includes the case where the second branch oil passage 2114 directly communicates with the main oil passage 2112, and the case where the second branch oil passage 2114 indirectly communicates with the main oil passage 2112 through other oil passages.

[0080] In some embodiments, as shown in FIG. 4 and FIG. 6, the lubricating oil passage 211 includes a main oil passage 2112, a first branch oil passage 2113, and a second branch oil passage 2114. The main oil passage 2112 is in communication with the oil supply cavity 11, the first branch oil passage 2113 is in communication with the main oil passage 2112, and the first branch oil passage 2113 is provided with a first lubricating oil port 21111. The second branch oil passage 2114 is in communication with the first branch oil passage 2113, and the second branch oil passage 2114 is provided with a second lubricating oil port 21112. The main oil passage 2112, the first branch oil passage 2113, and the second branch oil passage 2114 are connected in series.

[0081] With the above arrangement, the oil can be sequentially transported back to the oil along the main oil passage 2112, the first branch oil passage 2113, and the second branch oil passage 2114. Moreover, the main oil passage 2112, the first branch oil passage 2113, and the second branch oil passage 2114 are connected in series, which can simplify the oil passage inside the oil return pump shell 21 and reduce the processing difficulty of the oil return pump shell 21.

[0082] In some embodiments, as shown in FIG. 5 and FIG. 6, the lubricating oil passage 211 includes a main oil passage 2112, a first branch oil passage 2113, and a second branch oil passage 2114. The main oil passage 2112 is in communication with the oil supply cavity 11, the first branch oil passage 2113 is in communication with the main oil passage 2112, and the first branch oil passage 2113 is provided with a first lubricating oil port 21111. The second branch oil passage 2114 is in communication with the main oil passage 2112, and the second branch oil passage 2114 is provided with a second lubricating oil port 21112. The first branch oil passage 2113 and the second branch oil passage 2114 are connected in parallel on the main oil passage 2112.

[0083] With the above arrangement, after the oil in the main flow passage is branched by the first branch oil passage 2113 and the second branch oil passage 2114, the oil is uniformly transported to the driving shaft 221 and the driven shaft 222 at the same time, thereby improving the synchronization and uniformity of lubrication and further improving the smoothness of starting of the oil return pump 2.

[0084] In some embodiments, as shown in FIG. 3, the lubricating oil passage 211 further includes a first oil distribution passage 2115. The main oil passage 2112 is connected to the midpoint of the first oil distribution passage 2115, and the first branch oil passage 2113 and the second branch oil passage 2114 are respectively connected to the two ends of the first oil distribution passage 2115.

[0085] That is, the midpoint of the first oil distribution passage 2115 is connected to the main oil passage 2112, and the two ends of the first oil distribution passage 2115 are respectively connected to the first branch oil passage 2113 and the second branch oil passage 2114. The first oil distribution passage 2115 can change the extension direction of the main oil passage 2112 and increase the extension path of the lubricating oil passage 211 along the radial direction of the main oil passage 2112, thereby facilitating the oil to flow to the position close to the driving shaft 221 and the driven shaft 222 after passing through the first oil distribution passage 2115, and further improving the rationality of the arrangement of the lubricating oil passage 211.

[0086] In addition, the first oil distribution channel 2115 can be configured as an arc shape with low middle and high ends. Such an arrangement can improve the flow rate of the oil in the first oil distribution channel 2115. The reason is that the arc-shaped flow channel can reduce the resistance of the oil flow and reduce energy loss.

[0087] In some embodiments, as shown in FIG. 3, the lubricating oil channel 211 further includes a third branch oil channel 2116. The third branch oil channel 2116 is in communication with the first branch oil channel 2113, and the third branch oil channel 2116 is arranged in a length direction (e.g., an axial direction) of the driven shaft 222 apart from the second branch oil channel 2114. The third branch oil channel 2116 is provided with a second lubricating oil port 21112.

[0088] That is, the third branch oil channel 2116 is in communication with the first branch oil channel 2113, and the third branch oil channel 2116 is provided with a second lubricating oil port 21112 facing the driven shaft 222. In this way, the oil can flow through the third branch oil channel 2116 to the side of the driven shaft 222 away from the oil supply pump 1 in the axial direction after passing through the first branch oil channel 2113, and then the oil can flow through the second lubricating oil port 21112 on the third branch oil channel 2116 to the shaft end of the driven shaft 222 away from the oil supply pump 1 in the axial direction, thereby preferentially ensuring the lubrication effect of the driving shaft 221 (since the driving shaft 221 is a driving shaft). This can reduce the starting resistance of the driving shaft 221 and make the starting work of the oil return pump 2 smoother.

[0089] That is, the third branch oil channel 2116 is arranged in the length direction of the driven shaft 222 apart from the second branch oil channel 2114, and the second branch oil channel 2114 and the third branch oil channel 2116 can form the above-mentioned avoidance space. Since the oil return pump housing 21 has a housing structure area with a thin wall thickness that cannot be provided with an oil channel (for example, the oil return pump housing 21 needs to avoid some other structures, thereby resulting in a thin housing that cannot be provided with an oil channel), no oil channel is needed in such an area. On the one hand, it can avoid related structural members, and on the other hand, it can improve the rationality of space arrangement.

[0090] In some embodiments, as shown in FIGS. 2-6, the driven shaft 222 includes a first driven shaft 2221 and a second driven shaft 2222 connected in sequence in the length direction of the driven shaft 222. The second lubricating oil port 21112 of the second branch oil channel 2114 discharges oil towards the first driven shaft 2221, and the second lubricating oil port 21112 of the third branch oil channel 2116 discharges oil towards the second driven shaft 2222.

[0091] It can be understood that the first driven shaft 2221 and the second driven shaft 2222 are connected in sequence in the axial direction, and the plurality of second lubricating oil outlets 21112 correspondingly discharge oil towards the first driven shaft 2221 and the second driven shaft 2222, respectively. In this way, the discharge of oil can be accelerated, and the circulation of oil can be accelerated, so that the joint between the first driven shaft 2221 and the second driven shaft 2222 can be efficiently lubricated, and it can also be ensured that the first driven shaft 2221 and the second driven shaft 2222 can be lubricated during operation, so that the uniformity of lubrication of the first driven shaft 2221 and the second driven shaft 2222 by the oil can be improved, the risk of uneven lubrication causing a large difference in wear between the first driven shaft 2221 and the second driven shaft 2222 can be avoided, and the normal working stability of the oil return pump 2 can be ensured. Moreover, when the oil return pump 2 needs to be provided with a plurality of oil return chambers, a plurality of driven gears need to be connected in series on the driven shaft 222, resulting in a long length of the driven shaft 222, and production, processing and assembly are difficult; in some embodiments of the present disclosure, the driven shaft 222 is provided in a multi-segment structure, which can effectively avoid the problem of difficult production, processing and assembly caused by the excessively long length of the driven shaft 222.

[0092] In some embodiments, as shown in FIGS. 2 to 6, the two ends of the first driven shaft 2221 and the two ends of the second driven shaft 2222 are each provided with a second bearing. The second lubricating oil outlet 21112 of the second oil channel 2114 discharges oil towards the second bearing at one end of the first driven shaft 2221, and the third oil channel 2116 is provided with at least three second lubricating oil outlets 21112, and the at least three second lubricating oil outlets 21112 respectively discharge oil towards the second bearings at the other end of the first driven shaft 2221 and the two ends of the second driven shaft 2222.

[0093] The second bearing can support the first driven shaft 2221 and the second driven shaft 2222, so that the first driven shaft 2221 and the second driven shaft 2222 can rotate smoothly and accurately, thereby improving the working stability and durability of the oil return pump 2. Moreover, when the oil return pump 2 needs to be provided with a plurality of oil return chambers, resulting in a long length of the driven shaft 222, some embodiments of the present disclosure can also provide support for the long driven shaft 222 at multiple positions, thereby ensuring the strength and movement stability of the driven shaft 222.

[0094] In addition, the second oil channel 2114 and the third oil channel 2116 respectively have the second lubricating oil outlets 21112 corresponding to the second bearings on the first driven shaft 2221 and the second driven shaft 2222. In this way, the lubricating oil in the oil supply chamber 11 can be introduced to the second bearings, thereby playing a key lubricating role on the second bearings supporting the first driven shaft 2221 and the second driven shaft 2222, effectively improving the lubricating effect at the second bearings, reducing the wear at the connection between the second bearings and the first driven shaft 2221 and the second driven shaft 2222, and thereby ensuring the working stability and reliability of the oil return pump shaft 22.

[0095] In some embodiments, as shown in FIG. 6, both ends of the first driven shaft 2221 and both ends of the second driven shaft 2222 are provided with a second ring groove 2223 matched with the second bearing.

[0096] It can be understood that the second bearing and the second ring groove 2223 can establish a limiting fit relationship in the axial direction, so as to ensure the positional stability of the second bearing, and also facilitate the flow of oil along the second ring groove 2223, thereby fully lubricating the joint of the second bearing and the first driven shaft 2221 and the second driven shaft 2222. Moreover, the second ring groove 2223 can limit the spread of oil to the outside of the annular groove in the axial direction, so that the oil can more uniformly lubricate the joint of the second bearing and the first driven shaft 2221 and the second driven shaft 2222, thereby improving the lubrication uniformity and lubrication efficiency of the oil pump shaft 22. In addition, the second ring groove 2223 can also accelerate the heat dissipation effect of the oil.

[0097] In some embodiments, as shown in FIG. 3, the lubricating oil channel 211 further comprises a second oil distribution channel 2117. The second oil distribution channel 2117 is in communication with the first branch oil channel 2113 and the third branch oil channel 2116, respectively, and the first branch oil channel 2113 and the third branch oil channel 2116 are connected to both ends of the second oil distribution channel 2117, respectively.

[0098] That is, both ends of the second oil distribution channel 2117 are connected to the first branch oil channel 2113 and the third branch oil channel 2116, respectively. The second oil distribution channel 2117 can change the extension direction of the first branch oil channel 2113 and increase the extension path of the first branch oil channel 2113 towards the third branch oil channel 2116, thereby facilitating the flow of oil through the second oil distribution channel 2117 to the position close to the driven shaft 222 away from the oil pump 1 in the axial direction, thereby improving the rationality of the arrangement of the lubricating oil channel 211.

[0099] In addition, the second oil distribution channel 2117 can be configured as an arc shape with low middle and high both ends, and such arrangement can improve the flow rate of oil in the second oil distribution channel 2117. The reason is that the arc-shaped flow channel can reduce the resistance of oil flow and reduce energy loss.

[0100] In some embodiments, as shown in FIG. 2, the oil pump shell 21 comprises a pump body 212 and a pump cover, the pump cover is arranged on the side of the pump body 212 away from the oil pump 1, and the lubricating oil channel 211 is formed in the pump body 212 and the pump cover.

[0101] It can be understood that the pump cover can be covered on the pump body 212 (i.e., the pump cover is mounted on the flange surface 214), thereby ensuring the sealing of the oil return pump 2, preventing the liquid in the oil return pump 2 from leaking or external contaminants from entering the inside of the oil return pump 2. Moreover, by forming the lubricating oil channel 211 on the pump body 212 and the pump cover, on the one hand, the lubricating oil channel 211 can be relatively far away from the oil return pump shaft 22, thereby reducing the temperature rise of the oil caused by the high temperature generated by the oil return pump shaft 22 after high-speed rotation, ensuring the quality of the oil, on the other hand, the sealing of the pump cover and the pump body 212 can also be used to maintain the pressure and purity inside the lubricating oil channel 211, thereby ensuring the efficiency and stability of the lubrication work.

[0102] In some embodiments, as shown in FIGS. 2-6, the lubricating oil channel 211 is provided with a pump body outlet 2121 on the pump body 212, and the lubricating oil channel 211 is provided with a pump cover inlet 2131 on the pump cover. The pump body outlet 2121 communicates with the pump cover inlet 2131, and the cross-sectional area of the pump body outlet 2121 is greater than that of the pump cover inlet 2131.

[0103] That is, in the flow direction of the oil, the lubricating oil channel 211 is provided with a pump body outlet 2121 and a pump cover inlet 2131 on the pump body 212 and the pump cover respectively, the pump body outlet 2121 communicates with the pump cover inlet 2131, and the pump cover inlet 2131 communicates with the pump cover outlet 2132 (as shown in FIG. 6), which allows the oil to flow from the pump body outlet 2121 to the pump cover outlet 2132 and then to the outside of the oil return pump 2, and then the oil flowing out of the oil return pump 2 is collected by the oil supply pump 1, thereby completing the circulation of the oil. The cross-sectional area of the pump body outlet 2121 is greater than that of the pump cover inlet 2131, so that the oil pressure increases further during the process of flowing from the pump body outlet 2121 to the pump cover inlet 2131, thereby effectively increasing the circulation speed of the oil, and more conducive to the full lubrication effect of the driving shaft 221 and the driven shaft 222.

[0104] In some embodiments, as shown in FIGS. 3 and 7, the oil supply pump 1 includes an oil supply pump shaft 12. The driving shaft 221 is connected with the oil supply pump shaft 12. It can be understood that the oil supply pump shaft 12 and the driving shaft 221 are in transmission connection, so that the driving force on the oil supply pump shaft 12 can be transmitted to the driving shaft 221, thereby driving the moving parts (such as gears, blades or rotors, etc.) on the driving shaft 221 to work, thereby realizing the fluid conveying effect of the oil return pump 2. The oil supply pump 1 can guide the oil to the oil supply pump shaft 12 of the oil supply pump 1 through the oil groove 13, thereby playing a lubricating role on the oil supply pump shaft 12.

[0105] For example, the oil supply pump 1 includes an oil supply pump shaft 12, and the driving shaft 221 is integrally arranged with the oil supply pump shaft 12. In this way, the crankshaft of the engine can drive the oil supply pump shaft 12 while also driving the driving shaft 221, thereby improving the transmission efficiency.

[0106] In some embodiments, as shown in FIG. 3 and FIG. 7, the bottom of the oil supply cavity 11 is provided with an oil supply outlet, which is in communication with the lubricating oil passage 211. The oil supply outlet communicates the lubricating oil passage 211 and the oil supply cavity 11, so as to facilitate the oil in the oil supply cavity 11 to flow smoothly into the oil supply passage through the oil supply outlet, thereby ensuring the effect of the oil supply pump 1 delivering oil to the oil return pump 2.

[0107] Some embodiments of the present disclosure further provide an engine 1000. As shown in FIG. 8, the engine 1000 comprises the oil pump assembly 100 described above. Thus, through the oil pump assembly 100, the working reliability and durability of the engine can be improved.

[0108] Some embodiments of the present disclosure further provide a hybrid assembly 2000. As shown in FIG. 9, the hybrid assembly 2000 comprises the engine 1000 described above. Thus, through the engine, the working reliability and stability of the hybrid assembly can be improved.

[0109] For example, the hybrid assembly further comprises a motor assembly. The engine is located above the motor assembly. The engine comprises a body and an oil pan. The oil pan is located between the body and the motor assembly. The oil pump assembly 100 is arranged in the oil pan, and the oil return pump shaft 22 comprises a driving shaft 221 and a driven shaft 222, which are arranged in a horizontal direction.

[0110] Here, up and down refer to the up and down directions of the vehicle when driving on a flat road, and horizontal refers to the horizontal direction based on the vehicle driving on a flat road. The driving shaft 221 and the driven shaft 222 are arranged in a horizontal direction, so that the longitudinal height requirement of the oil pan can be reduced, thereby reducing the height dimension of the hybrid assembly in the up and down direction, and improving the integration of the hybrid assembly.

[0111] Some embodiments of the present disclosure further provide a vehicle 3000. As shown in FIG. 10, the vehicle 3000 comprises the hybrid assembly 2000 described above. Thus, through the hybrid assembly, the working reliability and stability of the vehicle can be improved, thereby improving the market competitiveness of the vehicle.

[0112] Other configurations and operations of the vehicle according to some embodiments of the present disclosure are known to those skilled in the art, and will not be described in detail here.

[0113] In the description of the disclosure, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the disclosure.

[0114] In the description of the disclosure, "first feature" and "second feature" can include one or more of the features.

[0115] In the description of the disclosure, the meaning of "a plurality of" is two or more.

[0116] In the description of the disclosure, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0117] In the description of the disclosure, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height.

[0118] In the description of the disclosure, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the disclosure can be understood according to the specific circumstances.

[0119] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the disclosure. In the specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example.

[0120] "A, B, and C at least one of" has the same meaning as "at least one of A, B, or C," including the following combinations of A, B, and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0121] Although the embodiments of the present disclosure have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

An oil pump assembly (100) comprises: an oil supply pump (1) formed with an oil supply cavity (11); and an oil return pump (2) connected with the oil supply pump (1), the oil return pump (2) comprising an oil return pump shell (21) and an oil return pump shaft (22) arranged in the oil return pump shell (21), the oil return pump shell (21) being formed with a lubricating oil passage (211) in communication with the oil supply cavity (11), the lubricating oil passage (211) having at least one lubricating oil port (2111) discharging towards the oil return pump shaft (22). The oil pump assembly (100) of claim 1, wherein The oil return pump shaft (22) comprises: a first rotating shaft; and a second rotating shaft driven by the first rotating shaft through at least one set of meshed gears. The at least one lubricating oil port (2111) comprises a plurality of lubricating oil ports (2111), some of the plurality of lubricating oil ports (2111) discharging towards the first rotating shaft, and the others of the plurality of lubricating oil ports (2111) discharging towards the second rotating shaft. The oil pump assembly (100) of claim 2, wherein The first rotating shaft is a driving shaft (221), and the second rotating shaft is a driven shaft (222). The plurality of lubricating oil ports (2111) comprises at least one first lubricating oil port (21111) discharging towards the driving shaft (221) and at least one second lubricating oil port (21112) discharging towards the driven shaft (222). The oil pump assembly (100) of claim 3, wherein The lubricating oil passage (211) comprises: a first branch oil passage (2113) provided with the at least one first lubricating oil port (21111); and a second branch oil passage (2114) provided with the at least one second lubricating oil port (21112). The lubricating oil passage (211) satisfies at least one of the following conditions: The first branch oil passage (2113) comprises a plurality of oil passage segments spaced along the axial direction of the first rotating shaft to define an avoiding space; or The second branch oil passage (2114) comprises a plurality of oil passage segments spaced along the axial direction of the second rotating shaft to define the avoiding space. The oil pump assembly (100) of claim 3, wherein The driving shaft (221) comprises a first driving shaft (2211) and a second driving shaft (2212) connected in sequence along the length direction of the driving shaft (221), the at least one first lubricating oil port (21111) comprises a plurality of first lubricating oil ports (21111) respectively discharging towards the first driving shaft (2211) and the second driving shaft (2212). The oil pump assembly (100) of claim 5, wherein, Both ends of the first driving shaft (2211) and both ends of the second driving shaft (2212) are provided with first bearings corresponding to the at least one first lubricating oil port (21111). The oil pump assembly (100) of claim 6, wherein Both ends of the first driving shaft (2211) and both ends of the second driving shaft (2212) are provided with a first ring groove (2213) matched with the first bearing. The oil pump assembly (100) of claim 3, wherein The lubricating oil passage (211) comprises: a main oil passage (2112) in communication with the oil supply cavity (11); a first branch oil passage (2113) in communication with the main oil passage (2112) and provided with the at least one first lubricating oil port (21111); and a second branch oil passage (2114) in communication with the main oil passage (2112) and provided with the at least one second lubricating oil port (21112). The oil pump assembly (100) of claim 8, wherein The lubricating oil passage (211) further comprises: a first sub-oil passage (2115), wherein the main oil passage (2112) is connected to the midpoint of the first sub-oil passage (2115), and the first branch oil passage (2113) and the second branch oil passage (2114) are respectively connected to both ends of the first sub-oil passage (2115). The oil pump assembly (100) of claim 9, wherein The first sub-oil passage (2115) is configured as an arc shape with a low middle and high ends. The oil pump assembly (100) according to any one of claims 8 to 10, wherein, The lubricating oil passage (211) further comprises: a third branch oil passage (2116) in communication with the first branch oil passage (2113) and spaced apart from the second branch oil passage (2114) in the length direction of the driven shaft (222), and the third branch oil passage (2116) is provided with the at least one second lubricating oil port (21112). The oil pump assembly (100) of claim 11, wherein The driven shaft (222) comprises a first driven shaft (2221) and a second driven shaft (2222) connected in sequence in the length direction of the driven shaft (222), the second lubricating oil port (21112) of the second branch oil passage (2114) is arranged to discharge oil towards the first driven shaft (2221), and the at least one second lubricating oil port (21112) of the third branch oil passage (2116) is arranged to discharge oil towards the second driven shaft (2222). The oil pump assembly (100) of claim 12, wherein Both ends of the first driven shaft (2221) and both ends of the second driven shaft (2222) are provided with a second bearing, the second lubricating oil port (21112) of the second branch oil passage (2114) is arranged to discharge oil towards the second bearing of one end of the first driven shaft (2221), the at least one second lubricating oil port (21112) of the third branch oil passage (2116) comprises at least three second lubricating oil ports (21112), and the at least three second lubricating oil ports (21112) are respectively arranged to discharge oil towards the second bearings of the other end of the first driven shaft (2221) and both ends of the second driven shaft (2222). The oil pump assembly (100) of claim 13, wherein Both ends of the first driven shaft (2221) and both ends of the second driven shaft (2222) are provided with a second ring groove (2223) matched with the second bearing. The oil pump assembly (100) according to any one of claims 11 to 14, wherein The lubricating oil passage (211) further comprises: A second oil distribution channel (2117) is in communication with the first branch oil channel (2113) and the third branch oil channel (2116) respectively, and the first branch oil channel (2113) and the third branch oil channel (2116) are connected to two ends of the second oil distribution channel (2117) respectively. The oil pump assembly (100) of claim 15, wherein The second oil distribution channel (2117) is configured as an arc shape with a low middle and high ends. The oil pump assembly (100) of claim 3, wherein The lubricating oil channel (211) comprises: A main oil channel (2112) in communication with the oil supply cavity (11); A first branch oil channel (2113) in communication with the main oil channel (2112) and provided with the at least one first lubricating oil port (21111); and A second branch oil channel (2114) in communication with the first branch oil channel (2113) and provided with the at least one second lubricating oil port (21112); The main oil channel (2112), the first branch oil channel (2113) and the second branch oil channel (2114) are connected in series. The oil pump assembly (100) of claim 3, wherein The lubricating oil channel (211) comprises: A main oil channel (2112) in communication with the oil supply cavity (11); A first branch oil channel (2113) in communication with the main oil channel (2112) and provided with the at least one first lubricating oil port (21111); and A second branch oil channel (2114) in communication with the main oil channel (2112) and provided with the at least one second lubricating oil port (21112); The first branch oil channel (2113) and the second branch oil channel (2114) are connected in parallel on the main oil channel (2112). The oil pump assembly (100) according to any one of claims 3 to 18, wherein, The oil supply pump (1) comprises an oil supply pump shaft (12), and the driving shaft (221) is connected with the oil supply pump shaft (12). The oil pump assembly (100) according to any one of claims 3 to 18, wherein, The oil supply pump (1) comprises an oil supply pump shaft (12), and the driving shaft (221) is integrally arranged with the oil supply pump shaft (12). The oil pump assembly (100) according to any one of claims 1 to 20, wherein, The oil return pump shell (21) comprises: A pump body (212); and A pump cover arranged on a side of the pump body (212) away from the oil supply pump (1), and the lubricating oil channel (211) is formed in the pump body (212) and the pump cover. The oil pump assembly (100) of claim 21, wherein The lubricating oil channel (211) is provided with a pump body outlet (2121) on the pump body (212) and a pump cover inlet (2131) on the pump cover, the pump body outlet (2121) is in communication with the pump cover inlet (2131), and a cross-sectional area of the pump body outlet (2121) is greater than that of the pump cover inlet (2131). The oil pump assembly (100) of any one of claims 1 to 22, wherein, A bottom of the oil supply cavity (11) is provided with an oil supply outlet in communication with the lubricating oil channel (211). An engine (1000) comprising: The oil pump assembly (100) according to any one of claims 1 to 23. A hybrid assembly (2000) comprising: The engine (1000) according to claim 24. The hybrid assembly (2000) of claim 25, further comprising: The motor assembly, the engine (1000) is located above the motor assembly, the engine (1000) includes a body and an oil pan, the oil pan is located between the body and the motor assembly, the oil pump assembly (100) is arranged in the oil pan, the oil return pump shaft (22) includes a driving shaft (221) and a driven shaft (222), the driving shaft (221) and the driven shaft (222) are arranged in a horizontal direction. A vehicle (3000) comprising: The hybrid assembly (2000) according to claim 25 or 26.

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