Oil pump, power system and vehicle

Abstract

The invention discloses an oil pump, a power system and a vehicle, relates to the technical field of vehicles, and aims to solve the problem of how to reduce the size of the oil pump. The oil pump comprises a rotor assembly, a stator assembly and a gear assembly, the rotor assembly comprises a first magnetic part and a rotating shaft connected to the first magnetic part, and the stator assembly and the first magnetic part are arranged in the axial direction of the rotating shaft; the stator assembly is suitable for being matched with the first magnetic part so as to drive the rotor assembly to rotate; the gear assembly is used for pumping oil and connected to the rotating shaft, and the stator assembly is arranged around the gear assembly.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an oil pump, a power system and a vehicle. Background Art

[0002] Vehicles require a powertrain to propel them. This system includes components such as a motor and a transmission. For example, the motor converts electrical energy into mechanical energy to provide propulsion for the vehicle, while the transmission coordinates the motor's speed with the actual wheel speed. To ensure proper operation of the powertrain, an oil pump is required to cool or lubricate components such as the motor and reducer.

[0003] In the prior art, as the performance and functions of vehicle power systems are gradually improved and the interior space is limited, the large size of the oil pump makes it inconvenient to arrange it on the vehicle. Summary of the Invention

[0004] The purpose of this application is to provide an oil pump, a power system and a vehicle, aiming to solve the problem of how to reduce the volume of the oil pump.

[0005] In a first aspect, an oil pump is provided, comprising a rotor assembly, a stator assembly and a gear assembly, wherein the rotor assembly comprises a first magnetic component and a rotating shaft connected to the first magnetic component, and the stator assembly and the first magnetic component are arranged axially along the rotating shaft; the stator assembly is suitable for cooperating with the first magnetic component to drive the rotor assembly to rotate; the gear assembly is used to pump oil, the gear assembly is connected to the rotating shaft, and the stator assembly is arranged around the gear assembly.

[0006] In the above scheme, the stator assembly and the first magnetic component in the rotor assembly are arranged along the axial direction of the rotating shaft, so that the stator assembly and the rotor assembly form an axial flux motor structure. The axial flux motor has the advantages of compact structure and high power density. Under the same power state, the axial dimension of the axial flux motor along the rotating shaft is smaller than that of the radial flux motor, which can effectively reduce the size of the oil pump. In addition, the stator assembly is arranged around the gear assembly, making full use of the inner space of the stator assembly to set the gear assembly. Compared with the gear assembly being arranged on the side of the stator assembly in the axial direction, the axial dimension of the oil pump along the rotating shaft is effectively reduced, thereby reducing the volume of the oil pump and reducing the space occupied by the oil pump in the vehicle.

[0007] Optionally, the oil pump also includes a housing, the housing is provided with a accommodating cavity, and the stator assembly is arranged in the accommodating cavity; the housing includes a protrusion and a first side wall and a second side wall arranged along the axial direction of the rotating shaft, the protrusion is provided in the accommodating cavity and connected to the first side wall, and the stator assembly is arranged around the protrusion.

[0008] The housing is provided with a mounting groove, which is recessed from the inner wall surface of the first side wall into the protrusion, and the gear assembly is arranged in the mounting groove.

[0009] Optionally, the first magnetic component is disposed in the accommodating cavity and is located on a side of the protrusion facing away from the first side wall.

[0010] Optionally, the gear assembly includes a first gear and a ring gear, the ring gear is rotatably connected in the mounting groove, the first gear is connected to the rotating shaft and is located in the ring gear, and the first gear is engaged with some teeth of the ring gear.

[0011] Optionally, the rotating shaft is provided with a first flow channel for circulating oil, and the first flow channel penetrates the rotating shaft along the axial direction of the rotating shaft; a first space is formed between the first magnetic member and the second side wall, and the first flow channel is connected to the first space.

[0012] Optionally, the shell further includes a peripheral wall connected between the first side wall and the second side wall, so that the first side wall, the second side wall and the peripheral wall form the accommodating cavity.

[0013] A first gap is formed between the first magnetic member and the peripheral wall, and a second gap is formed between the first magnetic member and the stator assembly. The first gap communicates with the second gap and the first space.

[0014] Optionally, a second space is formed between the inner circumferential surface of the stator assembly, the protrusion and the rotating shaft; and the second gap is connected to the second space.

[0015] Optionally, the first magnetic member is provided with a first through hole extending along the axial direction of the rotating shaft, and the first through hole connects the first space and the second space.

[0016] Optionally, the protrusion is provided with a second through hole, and the second through hole is connected to the second space and the mounting groove, and is connected to the gap between the first gear and the ring gear.

[0017] Optionally, the shell further includes a peripheral wall connected between the first side wall and the second side wall, so that the first side wall, the second side wall and the peripheral wall form the accommodating cavity.

[0018] The oil pump further includes a circuit board, which is disposed in the first space. Gaps are defined between the circuit board and the second side wall, between the circuit board and the peripheral wall, and between the circuit board and the first magnetic member.

[0019] Optionally, the shell further includes a fixing plate, which is connected to the peripheral wall and located between the circuit board and the first magnetic component, and the circuit board is connected to the fixing plate.

[0020] Optionally, there are gaps between the fixing plate and the first magnetic component, between the fixing plate and the circuit board, and between the fixing plate and the rotating shaft.

[0021] Optionally, a bearing is further included, wherein the outer ring of the bearing is fixedly connected to the protrusion, and the rotating shaft passes through the bearing and is fixedly connected to the inner ring of the bearing.

[0022] Optionally, the protrusion is provided with a circulation groove, and the circulation groove is communicated with the mounting groove and with the gap between the bearing and the rotating shaft.

[0023] Optionally, the protrusion is provided with a shaft hole, and the shaft is passed through the shaft hole; the circulation groove includes a first groove portion and a second groove portion that are connected to each other, the first groove portion is recessed radially along the inner circumferential surface of the shaft hole, and the second groove portion is recessed by the bottom wall surface of the mounting groove facing away from the first side wall.

[0024] Optionally, the oil pump further includes a pump cover, which is connected to the housing and covers the mounting groove. The pump cover is provided with an oil inlet channel, and the oil inlet channel is communicated with the mounting groove.

[0025] Optionally, part of the teeth of the first gear meshes with part of the teeth of the ring gear to form an oil outlet gap between the first gear and the ring gear, and another part of the teeth of the first gear is separated from another part of the teeth of the ring gear to form an oil inlet gap between the first gear and the ring gear.

[0026] A separator is further provided in the oil inlet channel, and the separator divides the oil inlet channel into a first channel and a second channel; the first channel is communicated with the oil inlet gap, and the second channel is communicated with the first flow channel.

[0027] Optionally, the pump cover is further provided with an oil outlet, and the oil outlet is communicated with the oil outlet gap.

[0028] In a second aspect, a power system is provided, including an oil pump.

[0029] In a third aspect, a vehicle is provided, comprising an oil pump or a power system.

[0030] It should be noted that the technical effects brought about by the implementation methods of the second and third aspects of this application can refer to the technical effects brought about by the corresponding implementation methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 A schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0033] Figure 2 for Figure 1 A schematic cross-sectional view of the oil pump of the vehicle shown in FIG;

[0034] Figure 3 for Figure 2 Schematic diagram of an exploded view of the oil pump shown in ;

[0035] Figure 4 for Figure 2 A schematic structural diagram of the stator assembly of the oil pump shown in FIG;

[0036] Figure 5 for Figure 2 and Figure 3 A schematic structural diagram of the first housing of the oil pump shown in FIG;

[0037] Figure 6 for Figure 5 A schematic cross-sectional structural diagram of the first shell shown in ;

[0038] Figure 7 for Figure 2 and Figure 3 A schematic structural diagram of the support shell shown in ;

[0039] Figure 8 for Figure 2 and Figure 3 A schematic structural diagram of the rotor assembly shown in ;

[0040] Figure 9 for Figure 2 and Figure 3 The structural diagram of the circuit board shown in ;

[0041] Figure 10 for Figure 2 and Figure 3 The structural diagram of the pump cover shown in ;

[0042] Figure 11 for Figure 2 and Figure 3 Schematic diagram of the gear assembly shown in .

[0043] Reference numerals:

[0044] 100. Vehicles;

[0045] 20. Wheels; 30. Body;

[0046] 1. First bolt; 2. Third seal;

[0047] 3. Pump cover; 31. Second channel; 32. First channel; 33. Oil outlet; 34. First connecting hole;

[0048] 4. Gear assembly; 41. First gear; 42. Ring gear; 43. Oil inlet clearance; 44. Oil outlet clearance;

[0049] 5. First housing; 51. Second through hole; 52. Second groove; 53. First groove; 54. Bearing; 55. First side wall; 56. Mounting groove; 57. Protrusion; 58. Peripheral wall; 59. Rotating shaft hole;

[0050] 6. stator assembly; 61. iron core; 62. coil; 63. annular disk; 64. first terminal;

[0051] 7. Rotor assembly; 71. Rotating shaft; 72. First flow channel; 73. First magnetic member; 74. Fixed disk; 75. First through hole;

[0052] 8. First sealing member;

[0053] 9. Support housing; 91. Sixth through hole; 92. Fifth through hole; 93. Second terminal; 94. Power terminal; 95. Second connection hole; 96. Connector; 97. Fixing column; 98. Fixing plate;

[0054] 10. Circuit board; 101. Fourth through hole; 102. Fixing hole; 103. Third connecting member; 104. Power supply hole;

[0055] 11. Second sealing member; 12. Bottom shell; 121. Second side wall; 13. Second bolt; 14. First space; 15. Second space; 16. Shell. DETAILED DESCRIPTION

[0056] In the embodiments of the present application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of the features.

[0057] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0058] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0059] In the embodiments of the present application, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement being discussed and the errors associated with the measurement of a specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0060] An embodiment of the present application provides an oil pump for pumping oil. For ease of understanding, the embodiment of the present application describes the oil pump as applied to a vehicle 100.

[0061] The vehicle 100 may be a hybrid electric vehicle, a plug-in hybrid electric vehicle, an extended-range electric vehicle, a fuel vehicle, etc. The vehicle 100 may also be a car, a van, a bus, a truck, a trailer, etc. The present application does not specifically limit the type of the vehicle 100.

[0062] See Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 100 provided in an embodiment of the present application. Vehicle 100 includes a body 30 and wheels 20. Body 30 can be used to carry passengers and install components required for vehicle 100, such as the power system. The power system can be a fuel-powered system or a hybrid power system. The power system is used to provide driving power for vehicle 100. The power system transmits power to wheels 20 located below body 30, and the rotation of wheels 20 drives body 30 to move.

[0063] In some examples, taking electric vehicle 100 as an example, the power system of vehicle 100 includes a motor and a transmission. The motor converts electrical energy into mechanical energy, thereby providing driving force for vehicle 100. The transmission reduces the motor's output speed through a fixed gear ratio while amplifying torque, enabling wheels 20 to obtain traction appropriate for the driving scenario.

[0064] It should be understood that the motor in the power system generates heat during operation. If the heat is not dissipated in time, the motor temperature will rise, affecting the motor's performance. In this case, an oil pump can be used to pump oil to the motor. The flow of oil removes the heat from the motor, thus preventing the motor temperature from continuing to rise.

[0065] There are gears inside the transmission. In order to improve the smoothness of transmission between gears and reduce the wear rate of gears during transmission, oil can be pumped into the transmission through an oil pump. The oil forms an oil film on the surface of the gears to lubricate the gears, which can improve the smoothness of gear transmission inside the transmission and reduce the wear rate of the gears.

[0066] In some embodiments, see Figure 2 and Figure 3 , Figure 2 for Figure 1 The cross-sectional structural diagram of the oil pump in the vehicle 100 is shown. Figure 3 for Figure 2 is an exploded view of an oil pump. The oil pump includes a rotor assembly 7, a stator assembly 6, and a gear assembly 4. The rotor assembly 7 includes a first magnetic member 73 and a rotating shaft 71 connected to the first magnetic member 73. The stator assembly 6 and the first magnetic member 73 are arranged axially along the rotating shaft 71. The stator assembly 6 is adapted to cooperate with the first magnetic member 73 to drive the rotor assembly 7 to rotate. The gear assembly 4 is used to pump oil. The gear assembly 4 is connected to the rotating shaft 71, and the stator assembly 6 is disposed around the gear assembly 4.

[0067] In the above scheme, the stator assembly 6 and the first magnetic member 73 in the rotor assembly 7 are arranged along the axial direction of the rotating shaft 71, so that the stator assembly 6 and the rotor assembly 7 form an axial flux motor structure. The axial flux motor has the advantages of compact structure and high power density. Under the same power state, the axial dimension of the axial flux motor along the rotating shaft 71 is smaller than that of the radial flux motor, which can effectively reduce the size of the oil pump. In addition, the stator assembly 6 is arranged around the gear assembly 4, that is, at least part of the gear assembly 4 is arranged in the radial space of the stator assembly 6, making full use of the inner space of the stator assembly 6. The gear assembly 4 is arranged in the inner space of the stator assembly 6. Compared with the gear assembly 4 being arranged on the side of the stator assembly 6 in the axial direction, the size of the oil pump along the axial direction of the rotating shaft is effectively reduced, thereby reducing the volume of the oil pump and reducing the space occupied by the oil pump in the vehicle 100.

[0068] In some examples, the stator assembly 6 includes an electromagnetic structure, which generates a magnetic field along the axial direction of the rotating shaft 71 when energized. The magnetic field acts on the first magnetic member 73, and the first magnetic member 73 rotates under the action of the magnetic field, thereby driving the rotating shaft 71 to rotate.

[0069] For some examples, see Figure 4 and Figure 8 The stator assembly 6 includes an annular disk 63, which is coaxially arranged with the rotating shaft 71. A plurality of iron cores 61 are arranged at intervals along the circumference of the annular disk 63. At least one coil 62 is wound around each iron core 61, and the axis of the coil 62 is parallel to the axis of the rotating shaft 71, or has a small angle with the axis of the rotating shaft 71, for example, the angle can be 1°, 1.5°, 2°, etc. When the coil 62 is energized, a magnetic field is generated in the direction of the first magnetic part 73. The annular disk 63 is provided with a first terminal 64, which is used to connect to an external power supply and is electrically connected to the coil 62.

[0070] In some examples, the number of stator assemblies 6 can be one or two. When the number of stator assemblies 6 is one, the stator assembly 6 and the first magnetic component 73 are arranged along the axial direction of the rotating shaft 71. When there are two stator assemblies 6, the two stator assemblies 6 can be respectively arranged on both sides of the first magnetic component 73 along the axial direction of the rotating shaft 71. By providing two stator assemblies 6, the output power of the oil pump can be improved, and since the two stator assemblies 6 are respectively located on both sides of the first magnetic component 73, the magnetic attraction between the stator assembly 6 and the first magnetic component 73 can be offset. This prevents the rotor assembly 7 from moving axially under the magnetic attraction of the stator assembly 6, thereby making the rotor assembly 7 more stable.

[0071] In some examples, the first magnetic member 73 is a permanent magnet.

[0072] In other examples, the first magnetic member 73 is an electromagnet.

[0073] In some embodiments, see Figure 2 and Figure 11 The gear assembly 4 includes a first gear 41 and a ring gear 42, and also includes a housing 16. The stator assembly 6 and the rotor assembly 7 are both disposed within the housing 16. The housing 16 also includes a mounting slot 56. The ring gear 42 is rotatably connected to the housing 16. The first gear 41 is connected to the rotating shaft 71 and is located within the ring gear 42. The first gear 41 meshes with some of the teeth of the ring gear 42. In other words, the first gear 41 and the ring gear 42 are not coaxial.

[0074] In the above solution, the first gear 41 of the gear assembly 4 is arranged inside the gear ring 42, that is, the gear assembly 4 is arranged in an internal meshing structure. This can reduce the volume of the gear assembly 4 and thus reduce the volume of the oil pump.

[0075] In some examples, the first gear 41 and the rotating shaft 71 are connected via a spline.

[0076] In other examples, a shaft key is provided between the first gear 41 and the rotating shaft 71 , and the shaft key enables transmission connection between the first gear 41 and the rotating shaft 71 .

[0077] In some examples, the ring gear 42 is rotatably arranged, and the rotation of the first gear 41 drives the ring gear 42 to rotate synchronously.

[0078] In some examples, the ring gear 42 has internal teeth, and the first gear 41 has external teeth, and the ring gear 42 is meshed with the external teeth of the first gear 41 through the internal teeth. In this case, the ring gear 42 and the first gear 41 are in an internal meshing manner.

[0079] For some specific examples, see Figure 2 and Figure 11 Part of the teeth of the first gear 41 meshes with part of the teeth of the ring gear 42, forming an oil outlet gap 44 between the first gear 41 and the ring gear 42. That is, the gap between the meshing teeth of the first gear 41 and the ring gear 42 forms the oil outlet gap 44. Another part of the teeth of the first gear 41 and another part of the teeth of the ring gear 42 are separated, forming an oil inlet gap 43 between the first gear 41 and the ring gear 42. That is, the gap between the non-meshing (i.e., separated) teeth of the first gear 41 and the ring gear 42 forms the oil inlet gap 43.

[0080] In the above scheme, along one diameter of the first gear 41, as the first gear 41 and the ring gear 42 rotate, some of the teeth of the first gear 41 and some of the teeth of the ring gear 42 tend to separate on one side of the diameter. This creates an oil inlet gap 43 between the first gear 41 and the ring gear 42, allowing oil to enter through this gap. On the other diameter, as the first gear 41 and the ring gear 42 rotate, some of the teeth of the first gear 41 and some of the teeth of the ring gear 42 tend to mesh, forming an oil outlet gap 44 at the point where the first gear 41 and the ring gear 42 mesh. As the first gear 41 and the ring gear 42 rotate, the oil in the oil inlet gap 43 flows toward the oil outlet gap 44 under the action of the teeth. Ultimately, there, it is squeezed by the meshing teeth of the first gear 41 and the ring gear 42 and flows out of the oil outlet gap 44, thus achieving the oil pumping function. The internally meshing gear assembly 4 has a simple structure and a small size, thereby reducing the size of the oil pump.

[0081] In other embodiments, the gear assembly 4 includes a first gear 41 and a second gear. The first gear 41 is in driving connection with the rotating shaft 71, and both the first gear 41 and the second gear are provided with external teeth. In this case, the first gear 41 and the second gear are externally meshed. The oil pump's oil inlet and outlet can be positioned on either side of the meshing point between the first gear 41 and the second gear along the rotational direction of the first gear 41, achieving oil pumping through the squeezing of the first gear 41 and the second gear.

[0082] In some embodiments, see Figure 2 、 Figure 3 and Figure 6 The oil pump also includes a housing 16, which defines a housing cavity within which the stator assembly 6 is disposed. The housing 16 includes a protrusion 57 and a first sidewall 55 and a second sidewall 121 arranged axially along the rotating shaft 71. The protrusion 57 is disposed within the housing cavity and connected to the first sidewall 55. The stator assembly 6 is disposed around the protrusion 57. The housing 16 also defines a mounting groove 56, which is recessed from the inner wall of the first sidewall 55 into the protrusion 57. The gear assembly 4 is disposed within the mounting groove 56.

[0083] In the above embodiment, the housing 16 is provided with a housing cavity, and a protrusion 57 is disposed within the housing cavity. The inner surface of the first sidewall 55 is recessed into the protrusion 57 to form a mounting groove 56. When the stator assembly 6 is disposed within the housing cavity and the gear assembly 4 is disposed within the mounting groove 56, the stator assembly 6 is positioned around the gear assembly 4. This positional relationship between the stator assembly 6 and the gear assembly 4 reduces the axial dimension of the oil pump along the rotating shaft 71, thereby reducing the volume of the oil pump.

[0084] In some examples, the stator assembly 6 is fixed in the accommodating cavity. For example, the annular disk 63 of the stator assembly 6 can be fixedly connected to the shell 16 by connecting parts such as bolts to fix the stator assembly 6 in the accommodating cavity.

[0085] In other examples, the stator assembly 6 can be fixed in the accommodating cavity by setting a component such as a press sleeve in the accommodating cavity to limit the axial displacement of the stator assembly 6 and by limiting the radial movement of the stator assembly 6 through the peripheral wall 58 of the accommodating cavity.

[0086] In some examples, the housing 16 may be a housing made of a metal material, such as aluminum or cast iron, formed by casting and machining.

[0087] In some examples, the axial direction of the rotating shaft 71 is the height direction of the gear assembly 4 . Along the height direction of the gear assembly 4 , the entire gear assembly 4 is located within the surrounding space of the stator assembly 6 .

[0088] In other examples, the axial direction of the rotating shaft 71 is the height direction of the gear assembly 4 , and along the height direction of the gear assembly 4 , part of the gear assembly 4 is located in the surrounding space of the stator assembly 6 .

[0089] In some examples, the ring gear 42 of the gear assembly 4 is loosely fitted with the inner circumferential wall of the mounting groove 56, so that the ring gear 42 is rotatably connected to the mounting groove 56. It should be understood that when the oil pump is operating, oil forms an oil film between the ring gear 42 and the inner circumferential wall of the mounting groove 56, which can reduce friction between the ring gear 42 and the inner circumferential wall of the mounting groove 56 and improve the smoothness of the rotation of the ring gear 42.

[0090] In other examples, the gear ring 42 may be connected to the mounting groove 56 via a first bearing. For example, the outer ring of the first bearing is engaged with the inner circumferential wall of the mounting groove 56, and the inner ring of the first bearing is engaged with the gear ring 42.

[0091] For some examples, see Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 The housing 16 may include a first housing 5, a support housing 9, and a bottom housing 12. The support housing 9 is connected between the first housing 5 and the bottom housing 12. The connection method may be that the support housing 9 is connected to the first housing 5 via a second bolt 13, and the bottom housing 12 is connected to the support housing 9 via the second bolt 13; or the bottom housing 12 is connected to the first housing 5 via the second bolt 13, and the support housing 9 is provided with a second connection hole 95. The second bolt 13 is passed through the second connection hole 95, clamping the support housing 9 between the first housing 5 and the bottom housing 12.

[0092] The support housing 9 can be provided with a connector 96, which connects the external circuit to the internal circuit of the oil pump. Specifically, the external circuit can be connected to the coil 62 of the stator assembly 6 in the oil pump via the connector 96. When energized, the coil 62 generates a magnetic field along the axis of the rotating shaft 71. Under the influence of the magnetic field generated by the coil 62, the first magnetic member 73 in the rotor assembly 7 rotates, driving the rotating shaft 71 to rotate with it. The rotating shaft 71 then drives the first gear 41 in the gear assembly 4 to rotate, and the oil is pumped through the meshing of the first gear 41 and the ring gear 42.

[0093] It should be understood that when the housing includes the first housing 5, the support housing 9, and the bottom housing 12, the first sidewall 55 is the wall surface of the first housing 5 facing the stator assembly 6 along the axial direction of the rotating shaft 71, and the second sidewall 121 is the wall surface of the bottom housing 12 facing the stator assembly 6 along the axial direction of the rotating shaft 71. A first seal 8 may be provided between the first housing 5 and the support housing 9, and a second seal 11 may be provided between the support housing 9 and the bottom housing 12. The first seal 8 seals the first housing 5 and the support housing 9, while the second seal 11 seals the support housing 9 and the bottom housing 12 to prevent oil leakage from the housing.

[0094] In some examples, the first sealing member 8 and the second sealing member 11 may be O-rings or rubber gaskets.

[0095] In some embodiments, the housing 16 further includes a peripheral wall 58 connected between the first side wall 55 and the second side wall 121 , so that the first side wall 55 , the second side wall 121 and the peripheral wall 58 enclose the accommodating cavity.

[0096] In some examples, the first shell 5 , the support shell 9 and the bottom shell 12 are respectively provided with a first peripheral wall 58 , a second peripheral wall 58 and a third peripheral wall 58 around the rotating shaft 71 , and the first peripheral wall 58 , the second peripheral wall 58 and the third peripheral wall 58 form the peripheral wall 58 of the shell.

[0097] In some examples, the first sidewall 55 may be a sidewall of the first housing 5 facing the stator assembly 6 .

[0098] In some examples, the second sidewall 121 may be a sidewall of the bottom housing 12 facing the stator assembly 6 .

[0099] In some embodiments, see Figure 2 and Figure 8 , first magnetic member 73 is disposed within the accommodating cavity and located on the side of protrusion 57 facing away from first sidewall 55. Since stator assembly 6 is disposed within the accommodating cavity, mounting groove 56 is disposed within protrusion 57, and gear assembly 4 is disposed within mounting groove 56, when first magnetic member 73 is located on the side of protrusion 57 facing away from first sidewall 55, first magnetic member 73 is also located on the side of gear assembly 4 facing the bottom wall of mounting groove 56. This arrangement allows gear assembly 4 to be located within the space surrounded by stator assembly 6, thereby reducing the volume of the oil pump.

[0100] In some embodiments, see Figure 2 and Figure 8The rotating shaft 71 is provided with a first flow channel 72 for circulating oil. The first flow channel 72 extends through the rotating shaft 71 along the axial direction of the rotating shaft 71. A first space 14 is formed between the first magnetic member 73 and the second side wall 121, and the first flow channel 72 is connected to the first space 14. By connecting the first flow channel 72 of the rotating shaft 71 with the first space 14 between the first magnetic member 73 and the second side wall 121, oil can be transported into the first space 14 through the first flow channel 72, thereby cooling the first magnetic member 73 with the oil. This achieves self-cooling inside the oil pump, reduces the internal temperature of the oil pump, and improves oil pump performance.

[0101] For some examples, see Figure 2 、 Figure 3 and Figure 9 The oil pump further includes a circuit board 10, which is electrically connected to the coil 62 and is used to supply power to the coil 62, causing the coil 62 to generate a magnetic field directed toward the first magnetic member 73. The circuit board 10 is disposed in the first space 14, with gaps defined between the circuit board 10 and the second side wall 121, between the circuit board 10 and the peripheral wall 58, and between the circuit board 10 and the first magnetic member 73.

[0102] In the above solution, the circuit board 10 is placed in the first space 14, and gaps are formed between the circuit board 10 and the second side wall 121, the peripheral wall 58, and the first magnetic member 73. When oil flows into the first space 14 through the first flow channel 72 of the rotating shaft 71, the oil flows through the gaps between the circuit board 10 and the second side wall 121, between the circuit board 10 and the peripheral wall 58, and between the circuit board 10 and the first magnetic member 73, the oil can simultaneously cool the circuit board 10 and the first magnetic member 73, thereby reducing the temperature of the circuit board 10 and the first magnetic member 73 and improving oil pump performance.

[0103] In some examples, the circuit board 10 is provided with a fourth through hole 101, and the rotating shaft 71 is disposed through the fourth through hole 101, so that the oil outlet end of the first flow channel 72 is located between the circuit board 10 and the second side wall 121. In this manner, the oil can first cool the side of the circuit board 10 facing the second side wall 121. The oil then flows through the gap between the circuit board 10 and the peripheral wall 58 into the gap between the circuit board 10 and the first magnetic member 73. At this point, the oil can cool the side of the circuit board 10 facing away from the second side wall 121, thereby enhancing the cooling effect of the oil on the circuit board 10.

[0104] In other examples, the oil outlet end of the first flow channel 72 is located in the gap between the circuit board 10 and the first magnetic member 73. In this case, a plurality of third through holes can be provided on the circuit board 10. The oil can flow through the third through holes into the gap between the circuit board 10 and the second side wall 121 to cool the side of the circuit board 10 facing the second side wall 121, and then flow out through the gap between the circuit board 10 and the peripheral wall 58. This arrangement can improve the smoothness of the oil flow between the circuit board 10 and the second side wall 121.

[0105] In some embodiments, see Figure 2 A first gap is formed between the first magnetic member 73 and the peripheral wall 58, and a second gap is formed between the first magnetic member 73 and the stator assembly 6. The first gap connects the second gap and the first space 14. In this way, the oil entering the first space 14 through the first flow channel 72 can flow into the second gap through the first gap, thereby cooling the two adjacent surfaces of the stator assembly 6 and the first magnetic member 73, thereby improving the cooling effect.

[0106] In some examples, the diameter of the first magnetic member 73 is smaller than the diameter of the peripheral wall 58 where the first magnetic member 73 is located, so that a first gap is formed between the first magnetic member 73 and the peripheral wall 58 .

[0107] In some examples, the first gap may be 2 mm, 3 mm, 4 mm, etc.

[0108] In some examples, the second gap may be 1 mm, 2 mm, 3 mm, etc.

[0109] In some embodiments, see Figure 2 A second space 15 is formed between the inner circumferential surface of the stator assembly 6, the protrusion 57, and the rotating shaft 71. The second gap is connected to the second space 15. This arrangement allows oil to enter the second space 15 to further cool the stator assembly 6 and the rotating shaft 71, thereby improving the self-cooling effect inside the oil pump.

[0110] It should be noted that, in this embodiment, the inner circumference of the stator assembly 6 includes the axial surfaces of the plurality of coils 62 facing the annular disk 63 and the inner circumference of the annular disk 63 .

[0111] In some embodiments, see Figure 2 、 Figure 3 、 Figure 5 and Figure 6The first magnetic member 73 is provided with a first through hole 75 extending axially along the rotating shaft 71. The first through hole 75 connects the first space 14 and the second space 15. In this way, the oil can not only flow through the first gap between the first magnetic member 73 and the peripheral wall 58, but also flow from the first space 14 to the second space 15 through the first through hole 75 of the first magnetic member 73, thereby accelerating the flow of the oil and improving the cooling effect.

[0112] In some examples, there may be a plurality of first through holes 75 , and the plurality of first through holes 75 are distributed circumferentially on the first magnetic member 73 along the axis of the rotating shaft 71 .

[0113] In some examples, the first magnetic member 73 includes a magnetic portion and a fixed disk 74, wherein the magnetic portion is disposed around the fixed disk 74. The fixed disk 74 is disposed around and connected to the rotating shaft 71. The first through hole 75 can be disposed in the magnetic portion or in the fixed disk 74.

[0114] In some embodiments, see Figure 2 、 Figure 5 and Figure 6 The protrusion 57 is provided with a second through hole 51 , and the second through hole 51 communicates with the second space 15 and the mounting groove 56 , and communicates with the gap between the first gear 41 and the ring gear 42 .

[0115] It should be understood that the gap between the first gear 41 and the ring gear 42 can be referred to as the oil inlet gap 43 between the first gear 41 and the ring gear 42. The second through hole 51 connects the second space 15 and the mounting groove 56, further connecting the oil inlet gap 43 between the first gear 41 and the ring gear 42. This allows cooling oil in the second space to flow through the second through hole 51 into the oil inlet gap 43 between the first gear 41 and the ring gear 42. The cooling oil is then pumped to the outside of the oil pump through the rotation of the first gear 41 and the ring gear 42, removing heat from the oil pump and improving its internal cooling effect.

[0116] For some examples, see Figure 2 , Figure 2 The dotted line L1 in the figure is the flow path of the pumped oil when the oil pump is working, and the solid line L2 is the flow path of the cooling oil inside the oil pump when the oil pump is working.

[0117] The cooling oil enters the first space 14 of the oil pump through the first flow channel 72 of the rotating shaft 71, cooling the circuit board 10 in the first space 14. The oil then flows from the first space 14 through the first through-hole 75 of the first magnetic member 73 and the first and second gaps, entering the second space 15. The oil cools the first magnetic member 73 during its flow from the first space 14 to the second space 15. After entering the second space 15, the oil cools the stator assembly 6 and other components in the second space 15. The oil then flows from the second space 15 through the second through-hole 51 into the oil inlet gap 43 of the gear assembly 4, where it is pumped to the outside of the oil pump.

[0118] In some examples, since the oil inlet gap 43 of the gear assembly 4 is approximately an arc-shaped structure, the second through hole 51 may be an arc-shaped hole, and the position of the arc-shaped hole is set corresponding to the oil inlet gap 43 .

[0119] In other examples, the second through hole 51 may be a circular hole, and the number of the circular holes may be one or more.

[0120] It should be understood that when gear assembly 4 pumps oil, a low-pressure zone is formed at the oil inlet gap 43 of gear assembly 4, and a high-pressure zone is formed at the oil outlet gap 44. Gear assembly 4 converts mechanical energy into kinetic energy of the oil, transporting the oil from the low-pressure zone to the high-pressure zone. Connecting second through-hole 51 to oil inlet gap 43 of gear assembly 4, i.e., positioning the cooling oil outlet in the low-pressure zone of gear assembly 4, accelerates the circulation of the cooling oil under the action of gear assembly 4, improving the cooling effect.

[0121] Moreover, when the output power of the oil pump is greater, the rotation speed of the gear assembly 4 is faster, and at this time, the circulation speed of the cooling oil is also accelerated. The circulation speed of the cooling oil is automatically changed with the output power of the oil pump, thereby improving the cooling effect.

[0122] In some embodiments, see Figure 2 、 Figure 3 and Figure 7 The housing 16 further includes a fixing plate 98, which is connected to the peripheral wall 58 and is located between the circuit board 10 and the first magnetic member 73. The circuit board 10 is connected to the fixing plate 98. Connecting the circuit board 10 to the fixing plate 98 has a simple structure and facilitates connection and removal of the circuit board 10.

[0123] In some examples, the fixing plate 98 can be provided on the support housing 9. For example, the fixing plate 98 and the support housing 9 can be integrally formed or connected by welding, screwing, or other methods. Since the external circuit is connected to the internal circuit of the oil pump via the connector 96 connected to the support housing 9, and the circuit board 10 is a key component of the internal circuit of the oil pump, connecting the circuit board 10 to the fixing plate 98 of the support housing 9 facilitates electrical connection between the circuit board 10 and the connector 96.

[0124] In other examples, the fixing plate 98 may be provided on the first housing 5 .

[0125] In some examples, the circuit board 10 is provided with a fixing hole 102 , and the circuit board 10 is connected to the fixing plate 98 by connecting the fixing column 97 to the fixing hole 102 .

[0126] In other embodiments, the circuit board 10 may be connected to the second side wall 121 of the housing 16 .

[0127] In some embodiments, see Figure 2 、 Figure 7 and Figure 8 There are gaps between the fixing plate 98 and the first magnetic member 73, between the fixing plate 98 and the circuit board 10, and between the fixing plate 98 and the rotating shaft 71. Because the fixing plate 98 is disposed between the first magnetic member 73 and the circuit board 10, when the cooling oil flows from the circuit board 10 toward the first magnetic member 73, the gaps between the fixing plate 98 and the first magnetic member 73, the circuit board 10, and the rotating shaft 71 all become flow paths for the cooling oil, allowing the cooling oil to flow more smoothly from the first space 14 to the second space 15, thereby improving the cooling effect.

[0128] In some examples, the fixing plate 98 is provided with a second terminal 93 , which is electrically connected to the connector 96 and is used to electrically connect to the first terminal 64 of the stator assembly 6 .

[0129] In some specific examples, the second wiring member 93 is a male plug, the first wiring member 64 is a female plug, and the second wiring member 93 is plug-connected to the first wiring member 64 .

[0130] In some examples, the connector 96 is provided with a power terminal 94, the circuit board 10 is provided with a power hole 104 and a third wiring member 103, the power terminal 94 is electrically connected to the power hole 104, and the third wiring member 103 is connected to the second wiring member 93. The third wiring member 103 can be a terminal post or a wiring hole, etc.

[0131] In some examples, a sixth through hole 91 is provided at the center of the fixing plate 98, and the rotating shaft 71 passes through the sixth through hole 91. A plurality of fifth through holes 92 are provided around the fixing plate 98 to increase the flow space of the oil.

[0132] In some embodiments, see Figure 2 and Figure 6 The oil pump further includes a bearing 54, the outer ring of the bearing 54 is fixedly connected to the protrusion 57, and the rotating shaft 71 is passed through the bearing 54 and fixedly connected to the inner ring of the bearing 54. By arranging the bearing 54 between the rotating shaft 71 and the protrusion 57, the smoothness of the rotation of the rotating shaft 71 is improved.

[0133] In some examples, the bearing 54 is a roller bearing 54 .

[0134] In other examples, the bearing 54 includes a rolling bearing 54 and a pressure bearing 54 . Since there is a magnetic attraction between the stator assembly 6 and the first magnetic member 73 , the magnetic attraction between the first magnetic member 73 and the stator assembly 6 is borne by the pressure bearing 54 .

[0135] In some other examples, the bearing 54 is a sliding bearing. For example, when the oil pump power is relatively low, a sliding bearing can be used.

[0136] In the following implementation, see Figure 2 and Figure 6 The protrusion 57 is provided with a flow groove, which is connected to the mounting groove 56 and to the gap between the bearing 54 and the rotating shaft 71. The mounting groove 56 is connected to the gap between the bearing 54 and the rotating shaft 71 through the flow groove. In this way, the oil in the mounting groove 56 can flow through the flow groove to the bearing 54 to lubricate the bearing 54, thereby extending the service life of the bearing 54.

[0137] In some specific embodiments, the protrusion 57 is provided with a shaft hole 59, and the shaft 71 is passed through the shaft hole 59. The circulation groove includes a first groove portion 53 and a second groove portion 52 that are connected to each other. The first groove portion 53 is recessed from the inner circumference of the shaft hole 59 along the radial direction of the shaft hole 59, and the second groove portion 52 is recessed from the bottom wall of the mounting groove 56 facing away from the first side wall 55.

[0138] In the above scheme, the circulation groove is composed of a first groove portion 53 and a second groove portion 52. Since the second groove portion 52 is recessed by the bottom wall of the mounting groove 56 facing away from the first side wall 55, the oil in the mounting groove 56 can flow into the second groove portion 52, and then flow from the second groove portion 52 into the first groove portion 53, and then enter the bearing 54 to lubricate the bearing 54. The structure is simple and easy to process.

[0139] In some examples, the second groove portion 52 may extend in a radial direction of the rotation shaft hole 59 and communicate with the first groove portion 53 .

[0140] In some examples, the first groove portion 53 may be disposed along the axial direction of the rotation shaft hole 59 .

[0141] In other examples, the first groove portion 53 may be spirally arranged along the circumference of the rotation shaft hole 59 .

[0142] It should be noted that when the gear assembly 4 is working, the oil outlet gap 44 is a high-pressure area for the oil. In this embodiment, the second groove portion 52 can be located on one side of the oil outlet gap 44 of the gear assembly 4. This ensures that the oil can flow smoothly along the flow groove into the bearing 54 for lubrication.

[0143] In some embodiments, see Figure 2 、 Figure 3 and Figure 10 The oil pump also includes a pump cover 3, which is connected to the housing 16 and covers the mounting groove 56. The pump cover 3 is provided with an oil inlet channel, which is connected to the mounting groove 56. The pump cover 3 is provided on one side of the mounting groove 56, and oil is delivered to the mounting groove 56 through the oil inlet channel of the pump cover 3. The structure is simple and easy to process and install.

[0144] In some examples, the pump cover 3 and the housing 16 can be connected by a connecting member such as a first bolt 1. Specifically, a first connecting hole 34 can be set in the pump cover 3, and a first threaded hole can be correspondingly set in the pump housing. The first bolt 1 is passed through the first connecting hole 34 and connected to the first threaded hole.

[0145] In other examples, the pump cover 3 and the housing 16 may be connected by components such as snaps.

[0146] In some examples, a third seal 2 may be provided on the outer peripheral surface of the oil inlet channel of the pump cover 3 to seal the connection between the oil inlet line and the pump cover 3 . The third seal 2 may be an O-ring or the like.

[0147] In some embodiments, a partition is further provided in the oil inlet channel, which divides the oil inlet channel into a first channel 32 and a second channel 31. The first channel 32 is in communication with the oil inlet gap 43, and the second channel 31 is in communication with the first flow channel 72.

[0148] The oil inlet channel is divided into a first channel 32 and a second channel 31 by setting a separator, and the second channel 31 is connected to the first flow channel 72 to supply oil to the cooling oil circuit. Such a setting can ensure that there is sufficient oil supply in the cooling oil circuit, thereby ensuring the cooling effect.

[0149] In some examples, the separator can be integrally formed with the pump cover 3. For example, the pump cover 3 is formed by casting or other methods, and the separator separates the interior of the pump cover 3 into the first channel 32 and the second channel 31. In other examples, the separator is a partition and is detachably connected to the pump cover 3, for example, by bolts or other connectors. The separator is connected to the oil inlet channel of the pump cover 3 by bolts, thereby separating the oil inlet channel into the first channel 32 and the second channel 31.

[0150] In some embodiments, the pump cover 3 is further provided with an oil outlet 33, which is connected to the oil outlet gap 44. In this way, the gear assembly 4 can pump oil to the outside through the oil outlet 33. The structure is simple and easy to process.

[0151] In some examples, the oil outlet 33 is recessed from the outer circumference of the pump cover 3 toward the inner circumference, and extends to a side surface of the pump cover 3 facing the housing 16 , and is communicated with the oil outlet gap 44 .

[0152] In some examples, a plug-in structure may be provided at the oil outlet 33 to connect the oil outlet 33 to an external pipeline via the plug-in structure. For example, the plug-in structure may be a quick-connect plug to connect the oil outlet to an external pipeline.

[0153] In some examples, a connection structure such as a thread may be provided at the oil outlet 33 to connect to an external pipeline through the connection structure.

[0154] In the description of the embodiments of the present application, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0155] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An oil pump, characterized in that: include: A rotor assembly (7) and a stator assembly (6), wherein the rotor assembly (7) comprises a first magnetic member (73) and a rotating shaft (71) connected to the first magnetic member (73), and the stator assembly (6) and the first magnetic member (73) are arranged along the axial direction of the rotating shaft (71); The stator assembly (6) is adapted to cooperate with the first magnetic member (73) to drive the rotor assembly (7) to rotate; A gear assembly (4) is used for pumping oil, the gear assembly (4) is connected to the rotating shaft (71), and the stator assembly (6) is arranged around the gear assembly (4).

2. The oil pump according to claim 1, characterized in that It also includes a housing (16), wherein the housing (16) is provided with a receiving cavity, and the stator assembly (6) is provided in the receiving cavity; The housing (16) includes a protrusion (57) and a first side wall (55) and a second side wall (121) arranged along the axial direction of the rotating shaft (71); the protrusion (57) is arranged in the accommodating cavity and connected to the first side wall (55); and the stator assembly (6) is arranged around the protrusion (57); The housing (16) is provided with a mounting groove (56), the mounting groove (56) being recessed from the inner wall surface of the first side wall (55) into the protrusion (57), and the gear assembly (4) is arranged in the mounting groove (56).

3. The oil pump according to claim 2, characterized in that The first magnetic member (73) is disposed in the accommodating cavity and is located on a side of the protrusion (57) that faces away from the first side wall (55).

4. The oil pump according to claim 2, characterized in that The gear assembly (4) comprises a first gear (41) and a ring gear (42), wherein the ring gear (42) is rotatably connected to the mounting groove (56), the first gear (41) is connected to the rotating shaft (71) and is located in the ring gear (42), and the first gear (41) is meshed with a portion of the teeth of the ring gear (42).

5. The oil pump according to claim 4, characterized in that The rotating shaft (71) is provided with a first flow channel (72) for circulating oil, and the first flow channel (72) penetrates the rotating shaft (71) along the axial direction of the rotating shaft (71); a first space (14) is formed between the first magnetic member (73) and the second side wall (121), and the first flow channel (72) is connected to the first space (14).

6. The oil pump according to claim 5, characterized in that The housing (16) further includes a peripheral wall (58), wherein the peripheral wall (58) is connected between the first side wall (55) and the second side wall (121), so that the first side wall (55), the second side wall (121) and the peripheral wall (58) enclose the accommodating cavity; A first gap is formed between the first magnetic member (73) and the peripheral wall (58), and a second gap is formed between the first magnetic member (73) and the stator assembly (6), and the first gap communicates with the second gap and the first space (14).

7. The oil pump according to claim 6, characterized in that A second space (15) is formed between the inner circumferential surface of the stator assembly (6), the protrusion (57) and the rotating shaft (71); and the second gap is communicated with the second space (15).

8. The oil pump according to claim 7, characterized in that The first magnetic member (73) is provided with a first through hole (75) extending along the axial direction of the rotating shaft (71), and the first through hole (75) communicates with the first space (14) and the second space (15).

9. The oil pump according to claim 7, characterized in that The protrusion (57) is provided with a second through hole (51), and the second through hole (51) is connected to the second space (15) and the mounting groove (56), and is connected to the gap between the first gear (41) and the gear ring (42).

10. The oil pump according to any one of claims 5 to 9, characterized in that: The housing (16) further includes a peripheral wall (58), wherein the peripheral wall (58) is connected between the first side wall (55) and the second side wall (121), so that the first side wall (55), the second side wall (121) and the peripheral wall (58) enclose the accommodating cavity; The oil pump further includes a circuit board (10), the circuit board (10) being arranged in the first space (14), and gaps being provided between the circuit board (10) and the second side wall (121), between the circuit board (10) and the peripheral wall (58), and between the circuit board (10) and the first magnetic member (73).

11. The oil pump according to claim 10, characterized in that The housing (16) further includes a fixing plate (98), the fixing plate (98) being connected to the peripheral wall (58) and being located between the circuit board (10) and the first magnetic member (73), the circuit board (10) being connected to the fixing plate (98).

12. The oil pump according to claim 11, characterized in that There are gaps between the fixing plate (98) and the first magnetic member (73), between the fixing plate (98) and the circuit board (10), and between the fixing plate (98) and the rotating shaft (71).

13. The oil pump according to any one of claims 4 to 9, characterized in that: The invention also includes a bearing (54), the outer ring of the bearing (54) is fixedly connected to the protrusion (57), and the rotating shaft (71) is passed through the bearing (54) and fixedly connected to the inner ring of the bearing (54).

14. The oil pump according to claim 13, characterized in that The protrusion (57) is provided with a circulation groove, which is communicated with the mounting groove (56) and is also communicated with the gap between the bearing (54) and the rotating shaft (71).

15. The oil pump according to claim 14, characterized in that The protrusion (57) is provided with a rotating shaft hole (59), and the rotating shaft (71) is passed through the rotating shaft hole (59); The circulation groove includes a first groove portion (53) and a second groove portion (52) that are connected to each other. The first groove portion (53) is recessed from the inner peripheral surface of the rotating shaft hole (59) along the radial direction of the rotating shaft hole (59), and the second groove portion (52) is recessed from the bottom wall surface of the mounting groove (56) facing away from the first side wall (55).

16. The oil pump according to any one of claims 5 to 9, characterized in that: The pump cover (3) is connected to the housing (16) and covers the mounting groove (56). The pump cover (3) is provided with an oil inlet passage, and the oil inlet passage is in communication with the mounting groove (56).

17. The oil pump according to claim 16, characterized in that Part of the teeth of the first gear (41) meshes with part of the teeth of the ring gear (42) to form an oil outlet gap (44) between the first gear (41) and the ring gear (42); another part of the teeth of the first gear (41) and another part of the teeth of the ring gear (42) are separated to form an oil inlet gap (43) between the first gear (41) and the ring gear (42); A separator is also provided in the oil inlet channel, and the separator divides the oil inlet channel into a first channel (32) and a second channel (31); The first channel (32) is in communication with the oil inlet gap (43), and the second channel (31) is in communication with the first flow channel (72).

18. The oil pump according to claim 17, characterized in that The pump cover (3) is further provided with an oil outlet (33), and the oil outlet (33) is communicated with the oil outlet gap (44).

19. A power system, characterized in that: The oil pump comprises the oil pump according to any one of claims 1 to 18.

20. A vehicle, characterized in that: The oil pump comprises the oil pump according to any one of claims 1 to 18, or the power system according to claim 19.

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