Motor oil pump assembly and vehicle

Abstract

The utility model relates to a motor oil pump assembly and a vehicle, and relates to the technical field of motors. The problem that in the prior art, a motor oil pump cannot conduct oil supply cooling on a motor rotor is solved. The motor oil pump assembly comprises a motor assembly. The motor assembly is used for converting electric energy into mechanical energy. The motor assembly comprises a motor shaft, a motor rotor, a motor shell, a transmission shaft and an oil pump assembly. The motor shaft has a first hollow oil duct. The motor rotor is sleeved on the motor shaft. The motor shaft is sleeved with the motor shell. A motor oil way is arranged in the motor shell. And one end of the transmission shaft is clamped with the motor shaft. The transmission shaft is provided with a second hollow oil channel, and the first hollow oil channel communicates with the second hollow oil channel. The oil pump assembly is connected with the end, away from the motor shaft, of the transmission shaft. The motor oil pump assembly is used for cooling a motor.

Description

Technical Field

[0001] This application relates to the technical field of motors, and particularly to a motor oil pump assembly and a vehicle. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy and is widely used in industries and household appliances. The operating efficiency of a motor determines the working efficiency, lifespan, and operating stability of the equipment it is in.

[0003] However, with the long-term operation and use of the equipment, the motor that converts energy will heat up due to long-term work. When the temperature rises to a certain level, the high temperature may damage the motor, thus affecting the operation of the equipment. In the prior art, most motors use cooling oil to cool the motor.

[0004] However, in the prior art, the oil pump used to cool the motor cannot supply oil to cool the motor rotor inside the motor due to structural reasons after being installed with the motor. Utility Model Content

[0005] This application provides a motor oil pump assembly and a vehicle to at least solve the problem that the motor oil pump in the prior art cannot supply oil to cool the motor rotor.

[0006] The technical solution of this application is as follows:

[0007] In a first aspect, this application provides a motor oil pump assembly, including a motor component. The motor component is used to convert electrical energy into mechanical energy. The motor component includes a motor shaft, a motor rotor, a motor housing, a transmission shaft, and an oil pump component. The motor shaft has a first hollow oil passage. The motor rotor is sleeved on the motor shaft. The motor housing is sleeved outside the motor shaft. The motor housing has a motor oil passage. The transmission shaft is coaxial with the motor shaft and is clamped to the motor shaft at one end. The transmission shaft has a second hollow oil passage, and the first hollow oil passage is communicated with the second hollow oil passage. The oil pump component is connected to the end of the transmission shaft away from the motor shaft. The oil pump component has an oil cavity and an oil pump passage. One end of the motor oil passage is connected to one end of the oil cavity, the other end of the oil cavity is connected to one end of the oil pump passage, and the other end of the oil pump passage is communicated with the second hollow oil passage.

[0008] According to the above technical means, in the motor oil pump assembly provided by the embodiments of the present application, the cooling oil can enter the oil cavity through the motor oil passage on the motor housing, and then enter the oil pump oil passage communicating with the oil cavity. The cooling oil enters the second hollow oil passage in the transmission shaft from the oil pump passage, and thus enters the first hollow oil passage, contacts the motor shaft and the motor rotor therein, and cools the motor shaft and the motor rotor. Thereby, the oil pump oil passage enters the motor through the hollow oil passages of the transmission shaft and the motor shaft to cool the motor shaft and the motor rotor, reduce the overall temperature of the motor, and keep the motor running normally.

[0009] In some embodiments, a receiving space is formed inside the motor housing, and the motor assembly further includes a cooling device. The cooling device is located outside the receiving space. The motor oil passage includes a first motor oil passage and a second motor oil passage. One end of the first motor oil passage communicates with the oil cavity. One end of the second motor oil passage communicates with the oil cavity, and the other end is connected to the cooling device.

[0010] According to the above technical means, heat exchange can be carried out with the cooling device, so that the temperature of the cooling oil is reduced.

[0011] In some embodiments, the oil pump assembly includes a pump body and a pump cover. The pump body has a first oil pump pipeline, and the first oil pump pipeline communicates with the motor oil passage. The pump cover is located on the side of the pump body away from the motor shaft and is connected to the pump body. The pump cover has a second oil pump pipeline, one end of the second oil pump pipeline communicates with the first oil pump pipeline, and the other end communicates with the second hollow oil passage.

[0012] According to the above technical means, the cooling oil can smoothly enter the transmission shaft and thus flow into the motor shaft.

[0013] In some embodiments, an avoidance hole is formed in the pump body, and an installation groove is formed on the side of the pump cover close to the pump body. One end of the transmission shaft away from the motor shaft passes through the avoidance hole and is snap-connected to the installation groove. And the second hollow oil passage 401 communicates with the second oil pump pipeline at the pump cover at the avoidance hole.

[0014] According to the above technical means, the cooling oil can smoothly enter the second hollow oil passage in the transmission shaft through the second oil pump pipeline in the pump cover.

[0015] In some embodiments, a sealing ring is further included. The sealing ring is located between the pump body and the pump cover. And the pump body and the pump cover are connected by bolts.

[0016] According to the above technical means, it is possible to prevent the leakage of the cooling oil flowing between the pump body and the pump cover.

[0017] In some embodiments, the motor oil pump assembly further includes a gasket. The gasket is located between the motor housing and the oil pump assembly.

[0018] According to the above technical means, it is possible to prevent the leakage of the cooling oil flowing between the motor housing and the oil pump assembly.

[0019] In some embodiments, one end of the motor shaft close to the transmission shaft has a recess, and one end of the transmission shaft close to the motor shaft has a protrusion. The recess and the protrusion are engaged with each other.

[0020] According to the above technical means, it is possible to align the first hollow oil passage in the motor shaft and the second hollow oil passage in the transmission shaft.

[0021] In some embodiments, the recess is a square groove, and the shape of the protrusion is square.

[0022] According to the above technical means, it is possible to stably connect the motor shaft and the transmission shaft.

[0023] In some embodiments, the pump body includes an inner rotor and an outer rotor. An installation hole is provided on the inner rotor, and the transmission shaft passes through the installation hole and is connected to the inner rotor. The outer rotor is located outside the inner rotor and meshes with the inner rotor. The oil chamber is located between the inner rotor and the outer rotor.

[0024] According to the above technical means, it is possible to make the cooling oil in the oil chamber flow in different motor oil passages under the relative rotation of the inner rotor and the outer rotor.

[0025] In a second aspect, the present application further provides a vehicle, including any one of the above motor oil pump assemblies and a fuel tank. The fuel tank is communicated with the other end of the first motor oil passage.

[0026] Thus, the above technical features of the present application have the following beneficial effects:

[0027] (1) It is possible to cool the motor shaft and the motor rotor.

[0028] (2) It is possible to perform heat exchange through the cooling device to reduce the temperature of the cooling oil.

[0029] (3) It is possible to smoothly introduce the cooling oil into the transmission shaft, so that it flows into the motor shaft 20.

[0030] (4) It is possible to smoothly introduce the cooling oil into the second hollow oil passage in the transmission shaft through the second hollow oil passage in the pump cover.

[0031] (5) It is possible to prevent the leakage of the cooling oil flowing between the pump body and the pump cover.

[0032] (6) It is possible to prevent the leakage of the cooling oil flowing between the motor housing and the oil pump assembly.

[0033] (7) It is possible to align the first hollow oil passage in the motor shaft and the second hollow oil passage in the transmission shaft.

[0034] (8) can enable a relatively stable connection between the motor shaft and the transmission shaft.

[0035] (9) can enable the cooling oil in the oil chamber to flow in different motor oil passages under the relative rotation of the inner rotor and the outer rotor.

[0036] (10) can enable the oil in the fuel tank to enter the motor oil pump assembly to cool the motor.

[0037] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application, and do not constitute an improper limitation of this application.

[0039] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a motor oil pump assembly provided by the present utility model;

[0040] Figure 2 is Figure 1 a partial structure schematic diagram of a motor oil pump assembly in FIG. 2;

[0041] Figure 3 is Figure 1 a cross-sectional view of a motor oil pump assembly in FIG. 3.

[0042] Reference numeral

[0043] 100 - motor oil pump assembly; 10 - motor assembly; 20 - motor shaft; 201 - first hollow oil passage; 30 - motor housing; 301 - motor oil passage; 302 - first motor oil passage; 303 - second motor oil passage; 40 - transmission shaft; 401 - second hollow oil passage; 50 - oil pump assembly; 51 - pump body; 511 - first oil pump pipeline; 52 - pump cover; 521 - second oil pump pipeline; 60 - sealing ring; 70 - gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] In order to enable those of ordinary skill in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0045] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0046] A large amount of heat is generated when the motor is running. When the temperature of the motor is too high, it will affect the energy transmitted by it and the operation of the entire vehicle. Therefore, the work of cooling the motor is relatively important.

[0047] In the related art, in order to solve the problem of heat generation of the motor in new energy vehicles during use, an oil cooling method is mostly used to cool the motor. And for the method of using cooling oil to cool the motor, an electronic oil pump or a mechanical oil pump needs to be used.

[0048] Among them, the electronic oil pump can be driven and then operated by its own motor, and there is no need to additionally set up an independent driving mechanism. However, the price of the electronic oil pump is relatively high, and the subsequent maintenance cost is also high. The mechanical oil pump is connected to the vehicle motor by a transmission mechanism and runs relying on the vehicle motor, without the need for additional power supply, and the structure is relatively simple.

[0049] In the related art, when using a mechanical oil pump to cool the motor, most of them install the cooling oil pump and the motor together, so that the oil in the oil pump can flow into the motor, come into contact with the motor, and conduct heat exchange. The oil takes away the heat of the motor itself, achieving the effect of cooling the motor, so that the motor can operate normally.

[0050] However, in the related art, in some cases, the motor drive shaft passes through the pump body and extends out of the pump body, preventing the oil from entering the motor shaft through the oil pump and the drive shaft to cool the motor rotor.

[0051] Based on this, the embodiments of the present application provide a vehicle, including any one of the above-mentioned motor oil pump assemblies and a fuel tank. The fuel tank is communicated with the other end of the first motor oil passage.

[0052] The vehicle can be a fuel vehicle, an electric vehicle, a hybrid vehicle, a gas vehicle, a methanol vehicle, a solar vehicle, etc. Exemplarily, the vehicle can be a passenger vehicle such as a sedan, a sport utility vehicle (SUV), a multi-purpose vehicle (MPV), etc., or can be a bus, a truck, a semi-trailer, etc. The present application does not make specific limitations thereto.

[0053] When the vehicle is an electric vehicle, the vehicle can include a battery pack and a motor. The battery pack is electrically connected to the motor, and the battery pack is used to store and provide electrical energy. The motor can convert the electrical energy in the battery pack into mechanical energy to provide power for other devices in the vehicle.

[0054] The present application also provides a motor oil pump assembly, as Figure 1 shown, Figure 1 is a schematic diagram of the overall structure of a motor oil pump assembly provided by the present utility model, including a motor assembly 10. The motor assembly 10 is used to convert electrical energy into mechanical energy. The motor assembly 10 includes a motor shaft 20, a motor rotor, a motor housing 30, a transmission shaft 40, and an oil pump assembly 50.

[0055] The motor shaft 20 has a first hollow oil passage 201( Figure 3 ). The motor rotor is sleeved on the motor shaft. The motor housing 30 is sleeved outside the motor shaft 20. The motor housing 30 has a motor oil passage 301( Figure 2 ). The transmission shaft 40 is coaxial with the motor shaft 20 and is clamped to one end of the motor shaft 20 at one end. The transmission shaft 40 has a second hollow oil passage 401( Figure 3 ), and the first hollow oil passage 201 is communicated with the second hollow oil passage 401. The oil pump assembly 50 is connected to the end of the transmission shaft 40 away from the motor shaft 20. The oil pump assembly 50 has an oil chamber and an oil pump passage. One end of the motor oil passage 301 is connected to one end of the oil chamber, the other end of the oil chamber is connected to one end of the oil pump passage, and the other end of the oil pump passage is communicated with the second hollow oil passage 401.

[0056] According to the above technical means, for the oil pump assembly 50 provided in the embodiment of the present application, the cooling oil can enter the oil chamber through the motor oil passage 301 on the motor housing 30, and then enter the oil pump oil passage communicated with the oil chamber. The cooling oil enters the second hollow oil passage 401 in the transmission shaft 40 from the oil pump passage, and thus enters the first hollow oil passage 201 to contact the motor shaft 20 and the motor rotor sleeved thereon, so as to cool the motor shaft 20 and the motor rotor.

[0057] Thereby, the oil passage of the oil pump enters the motor through the hollow oil passages of the transmission shaft 40 and the motor shaft 20 to cool the motor shaft 20 and the motor rotor, reduce the overall temperature of the motor, and keep the normal operation of the motor.

[0058] Exemplarily, the cooling oil may be the engine oil used in the vehicle.

[0059] In some embodiments, an accommodation space is formed inside the motor housing 30, and the motor assembly may further include a cooling device. The cooling device is located outside the accommodation space. The motor oil passage 301 includes a first motor oil passage 302 and a second motor oil passage 303. One end of the first motor oil passage 302 communicates with the oil chamber. One end of the second motor oil passage 303 communicates with the oil chamber, and the other end is connected to the cooling device.

[0060] The cooling oil enters the oil chamber through the first motor oil passage 302, and then enters the second motor oil passage 303 through the oil chamber. The cooling oil enters the cooling device through the second motor oil passage 303, and heat exchange is performed through the cooling device, so that the temperature of the cooling oil is reduced.

[0061] In this way, the temperature of the cooling oil after passing through the cooling device is lower. When it cools the motor rotor and the motor shaft 20, the effect will be better, and the motor can operate more smoothly.

[0062] In some embodiments, as Figure 2 and Figure 3 shown, Figure 2 is Figure 1 a partial structural schematic diagram of a motor oil pump assembly in Figure 3 is Figure 1 a cross-sectional view of a motor oil pump assembly in , the oil pump assembly 50 includes a pump body 51 and a pump cover 52. The pump body 51 has a first oil pump pipeline 511 inside, and the first oil pump pipeline 511 communicates with the motor oil passage 301. The pump cover 52 is located on the side of the pump body 51 away from the motor shaft 20 and is connected to the pump body 51. The pump cover 52 has a second oil pump pipeline 521, one end of the second oil pump pipeline 521 communicates with the first oil pump pipeline 511, and the other end communicates with the second hollow oil passage 401.

[0063] Specifically, the second motor oil passage 303 in the motor oil passage 301 communicates with the first oil pump pipeline 511 in the pump body 51.

[0064] After passing through the cooling device, the cooling oil enters the first oil pump pipeline 511 in the pump body 51 from the motor oil passage 301, and then enters the second oil pump pipeline 521 in the pump cover 52, and leads to the second hollow oil passage 401 communicating with the second oil pump pipeline 521. In this way, the cooling oil can smoothly enter the transmission shaft 40, and thus flow into the motor shaft 20.

[0065] In the related art, in some motors, channels for the circulation of cooling oil are provided on the inner wall of the motor housing. These channels can allow the cooling oil to flow to the positions that need to be cooled, cooling the motor and ensuring its stable operation. However, designing oil channels on the motor housing 30 occupies a relatively large amount of space inside the motor, which is not conducive to the compact arrangement of the internal structure of the motor.

[0066] The first hollow oil channel 201 and the second hollow oil channel 401 can not only ensure the accurate transmission of the cooling oil to the positions that need to be cooled, but also save the space inside the motor and reduce the manufacturing cost.

[0067] The pump body 51 and the pump cover 52 are separately designed, and oil pump pipelines are respectively provided inside the pump body 51 and the pump cover 52. Separating the design of the oil pump pipelines in this way can facilitate the processing of the oil pump pipelines.

[0068] Exemplarily, the shapes of the first oil pump pipeline 511 and the second oil pump pipeline 521 can be linear. In this way, machining linear oil pump pipelines on the pump body 51 and the pump cover 52 is simpler than machining oil pump pipelines of other shapes.

[0069] In some other embodiments, the shapes of the first oil pump pipeline 511 and the second oil pump pipeline 521 can be curved. Specifically, the shapes of the first oil pump pipeline 511 and the second oil pump pipeline 521 are not specifically limited, as long as they can transmit the cooling oil into the second hollow oil channel 401 of the transmission shaft 40.

[0070] Exemplarily, the axis of the transmission shaft 40 coincides with the central axis of the inner rotor, and the transmission shaft 40 and the inner rotor are in interference fit, so that the transmission shaft 40 can stably drive the inner rotor to rotate when it rotates.

[0071] In some embodiments, an avoidance hole is provided on the pump body 51, and an installation groove is provided on the side of the pump cover 52 close to the pump body 51. The end of the transmission shaft 40 far from the motor shaft 20 passes through the avoidance hole and is snap-connected to the installation groove. And the transmission shaft 40 is connected to the pump body 51 at the avoidance hole.

[0072] Specifically, the transmission shaft 40 being snap-connected inside the pump cover 52 can allow the cooling oil to smoothly enter the second hollow oil channel 401 inside the transmission shaft 40 through the second hollow oil channel 401 inside the pump cover 52.

[0073] In some embodiments, as Figure 3 shown, the motor oil pump assembly 100 further includes a sealing ring 60. The sealing ring 60 is located between the pump body 51 and the pump cover 52. And the pump body 51 and the pump cover 52 are connected by bolts.

[0074] The sealing ring 60 has a certain sealing effect and can fill the gap between the pump body 51 and the pump cover 52 to prevent the leakage of the cooling oil flowing between the pump body 51 and the pump cover 52.

[0075] In some embodiments, as Figure 1 shown, the motor oil pump assembly 100 further includes a gasket 70. The gasket 70 is located between the motor housing 30 and the oil pump assembly 50.

[0076] The gasket 70 also has a certain sealing effect and can fill the gap between the motor housing 30 and the oil pump assembly 50 to prevent the leakage of the cooling oil flowing between the motor housing 30 and the oil pump assembly 50.

[0077] Exemplarily, the materials of the sealing ring 60 and the gasket 70 can be rubber materials. Rubber materials have certain elasticity, wear resistance and tear resistance, and have good resistance to oils, fats and solvents, which are suitable as the materials of the sealing ring 60 and the gasket 70.

[0078] In some embodiments, one end of the motor shaft 20 close to the transmission shaft 40 has a recess, and one end of the transmission shaft 40 close to the motor shaft 20 has a protrusion. The recess and the protrusion are engaged with each other.

[0079] The recess provided at one end of the motor shaft 20 and the protrusion provided at one end of the transmission shaft 40 can enable the motor shaft 20 and the transmission shaft 40 to be assembled and connected in a relatively stable manner, so that the first hollow oil passage 201 in the motor shaft 20 and the second hollow oil passage 401 in the transmission shaft 40 can be aligned. Thus, it is ensured that sufficient cooling oil enters the motor shaft 20 and the rotor to cool them. At the same time, the aligned first hollow oil passage 201 and second hollow oil passage 401 can also prevent the leakage of the cooling oil.

[0080] In some other embodiments, one end of the motor shaft 20 close to the transmission shaft 40 may also have a first engaging portion, and one end of the transmission shaft 40 close to the motor shaft 20 may also have a second engaging portion. The first engaging portion and the second engaging portion can be engaged with each other. Specifically, the connection manner on the side where the transmission shaft 40 and the motor shaft 20 are close to each other is not specifically limited, as long as the first hollow oil passage 201 in the motor shaft 20 and the second hollow oil passage 401 in the transmission shaft 40 can be aligned.

[0081] In some embodiments, the recess is a square groove, and the shape of the protrusion is square.

[0082] The square groove can limit the relative rotation between the protrusion and the recess, and can enable a relatively stable connection between the motor shaft 20 and the transmission shaft 40. It can be understood that the shape of the recess should correspond to the shape of the protrusion, and is also square.

[0083] Exemplarily, the recess can be a kidney-shaped groove, and the corresponding convex part also has a kidney shape.

[0084] In some other embodiments, the convex part can also be of other shapes. As long as the relative rotation between the convex part and the recess can be restricted.

[0085] In some embodiments, the pump body 51 includes an inner rotor and an outer rotor. An installation hole is provided on the inner rotor, and the transmission shaft 40 passes through the installation hole and is connected to the inner rotor. The outer rotor is located outside the inner rotor and meshes with the inner rotor. The oil chamber is located between the inner rotor and the outer rotor.

[0086] When the motor operates, it will cause the motor shaft 20 to rotate, thereby driving the transmission shaft 40 to rotate together with the motor shaft 20. The rotation of the transmission shaft 40 can drive the inner rotor connected thereto to rotate. Among them, the position of the outer rotor remains fixed, and when the inner rotor rotates, a relative rotation can occur relative to the inner rotor.

[0087] Among them, the inner rotor has a plurality of first engaging parts around its circumference, and one side of the outer rotor close to the inner rotor has a plurality of second engaging parts. The first engaging parts and the second engaging parts are engaged with each other, and the number of the first engaging parts is less than the number of the second engaging parts.

[0088] In this way, when the inner rotor and the outer rotor are engaged, due to the difference in the number of the first engaging parts and the second engaging parts, vacancies will be generated at some of the second engaging parts, thereby forming an oil chamber. At the same time, since the inner rotor will rotate driven by the transmission shaft 40, the inner rotor will drive the first engaging parts to rotate. During the rotation process, vacancies will always be generated at different second engaging parts, resulting in the position of the oil chamber being continuously changed during the rotation of the transmission shaft 40.

[0089] At the same time, when a new oil chamber is formed, the space at the oil chamber will gradually increase, but it is not communicated with the external air, and the oil chamber is only communicated with the motor oil passage 301. Therefore, when the pressure in the oil chamber decreases, the cold area oil in the first motor oil passage 302 communicated with it will enter the oil chamber under the action of the pressure.

[0090] During the rotation of the inner rotor, the position of the oil chamber will also always change. At the same time, during the position change process, the second engaging part at its position will engage with the rotated first engaging part, so that the cooling oil in the oil chamber is squeezed by the first engaging part and enters the second motor oil passage 303 communicated with it for subsequent cooling treatment.

[0091] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electric motor oil pump assembly, characterized in that, Comprising: A motor assembly (10) for converting electrical energy into mechanical energy; The motor assembly (10) includes: A motor shaft (20) having a first hollow oil passage (201); A motor rotor sleeved on the motor shaft (20); A motor housing (30) sleeved outside the motor shaft (20); a motor oil passage (301) is provided inside the motor housing (30); A transmission shaft (40) coaxial with the motor shaft (20) and having one end clamped to the motor shaft (20); the transmission shaft (40) has a second hollow oil passage (401), and the first hollow oil passage (201) communicates with the second hollow oil passage (401); and An oil pump assembly (50) connected to the end of the transmission shaft (40) away from the motor shaft (20); an oil chamber and an oil pump passage are provided inside the oil pump assembly (50); one end of the motor oil passage (301) communicates with one end of the oil chamber, the other end of the oil chamber communicates with one end of the oil pump passage, and the other end of the oil pump passage communicates with the second hollow oil passage (401).

2. The motor oil pump assembly according to claim 1, wherein, An accommodation space is formed inside the motor housing (30), and the motor assembly (10) further includes: A cooling device located outside the accommodation space; The motor oil passage (301) includes: A first motor oil passage (302) having one end communicating with the oil chamber; and A second motor oil passage (303) having one end communicating with the oil chamber and the other end connected to the cooling device.

3. The motor oil pump assembly according to claim 1, characterized in that, The oil pump assembly (50) includes: A pump body (51) having a first oil pump pipeline (511) inside, and the first oil pump pipeline (511) communicates with the motor oil passage (301); A pump cover (52) located on the side of the pump body (51) away from the motor shaft (20) and connected to the pump body (51); a second oil pump pipeline (521) is provided on the pump cover (52), one end of the second oil pump pipeline (521) communicates with the first oil pump pipeline (511), and the other end communicates with the second hollow oil passage (401).

4. The motor oil pump assembly according to claim 3, wherein, An avoidance hole is provided on the pump body (51), and an installation groove is provided on the side of the pump cover (52) close to the pump body (51); the end of the transmission shaft (40) away from the motor shaft (20) passes through the avoidance hole and is clamped to the installation groove; and the second hollow oil passage (401) communicates with the second oil pump pipeline (521) at the avoidance hole and is connected to the pump body (51) at the avoidance hole.

5. The motor oil pump assembly according to claim 4, characterized in that, The motor oil pump assembly (100) further includes: A sealing ring (60) located between the pump body (51) and the pump cover (52); And the pump body (51) and the pump cover (52) are connected by bolts.

6. The motor oil pump assembly according to claim 1, wherein, The motor oil pump assembly (100) further includes: A gasket (70) located between the motor housing (30) and the oil pump assembly (50).

7. The motor oil pump assembly according to claim 1, characterized in that, One end of the motor shaft (20) close to the transmission shaft (40) has a recess, and one end of the transmission shaft (40) close to the motor shaft (20) has a protrusion; the recess and the protrusion are snap-fitted with each other.

8. The motor oil pump assembly according to claim 7, characterized in that The recess is a square groove, and the shape of the protrusion is square.

9. The motor oil pump assembly according to claim 3, characterized in that The pump body (51) includes: An inner rotor, on which an installation hole is provided, and the transmission shaft (40) passes through the installation hole and is connected to the inner rotor; and, An outer rotor, located outside the inner rotor and meshing with the inner rotor; the oil chamber is located between the inner rotor and the outer rotor.

10. A vehicle, characterized in that, Comprising: The motor oil pump assembly (100) according to any one of claims 1 to 9; An accommodation space is formed inside the motor housing (30), and the motor assembly (10) further includes: A cooling device, which is located outside the accommodation space; The motor oil passage (301) includes: A first motor oil passage (302), one end of which is communicated with the oil chamber; and, A second motor oil passage (303), one end of which is communicated with the oil chamber, and the other end of which is connected to the cooling device; And, A fuel tank, which is communicated with the other end of the first motor oil passage (302).

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