Electronic oil pump

Abstract

The invention provides an electronic oil pump, which belongs to the technical field of oil pumps, and comprises: a pump cover, which is provided with an oil inlet and a first oil inlet channel; the motor shell is provided with a motor cavity and an oil return channel; the motor assembly comprises a motor shaft, the motor shaft is rotatably connected with the motor shell, the motor shaft is provided with a second oil inlet channel in the axial direction of the motor shaft, and the oil inlet communicates with the motor cavity through the first oil inlet channel and the second oil inlet channel; and the rotor assembly is located between the pump cover and the motor shell, an oil passing channel is formed in the rotor assembly, and the motor cavity communicates with the oil inlet through the oil return channel and the oil passing channel. The electronic oil pump has the beneficial effects that low-temperature oil enters through the oil inlet, high-temperature oil returns through the oil return channel, double-face oil suction is achieved, the volume efficiency of the electronic oil pump at the high rotating speed is improved, the circulating flow is large, and the cooling effect on the motor assembly and the controller is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic oil pumps and relates to an electronic oil pump. Background Art

[0002] With the rapid development of the automotive industry, as automotive performance develops towards being safer, more reliable, more stable, fully automatic and intelligent, and environmentally friendly and energy-saving, electronic oil pumps are widely used in the lubrication system and cooling system of automobiles and can well meet the market requirements.

[0003] For example, a utility model patent with an application number of CN202020903688.5 discloses an electronic oil pump, which includes a pump body, a pump cover, an inner rotor, an outer rotor, a drive shaft, a motor housing, a motor rotor, a motor stator, a manifold, and a controller. The pump cover is provided with a pump cover shaft hole, and an oil seal hole is provided at the end of the pump cover shaft hole. An oil seal is provided in the oil seal hole to play a sealing role and prevent oil from entering the motor through the pump cover shaft hole. However, the heat dissipation of the internal structure of this electronic oil pump motor is through external natural cooling, so the cooling effect is poor and there is a large room for improvement. Summary of the Invention

[0004] The purpose of the present invention is to provide an electronic oil pump in view of the above problems existing in the prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions: An electronic oil pump includes:

[0006] A pump cover provided with an oil inlet and a first oil inlet passage;

[0007] A motor housing provided with a motor chamber and an oil return passage;

[0008] A motor assembly including a motor shaft rotatably connected to the motor housing. The motor shaft is provided with a second oil inlet passage along its axial direction. The oil inlet communicates with the motor chamber through the first oil inlet passage and the second oil inlet passage;

[0009] A rotor assembly located between the pump cover and the motor housing. The rotor assembly forms an oil passage. The motor chamber communicates with the oil inlet through the oil return passage and the oil passage.

[0010] In the above-mentioned electronic oil pump, the second oil inlet passage is a cylindrical hollow passage.

[0011] In the above-mentioned electronic oil pump, the motor assembly further includes a stator and a mover. The stator is connected to the motor housing, and the mover is connected to the motor shaft.

[0012] In the above-mentioned electronic oil pump, the rotor is provided with a first cooling channel along the axial direction of the motor shaft, and the first cooling channel penetrates through the rotor.

[0013] In the above-mentioned electronic oil pump, the rotor assembly includes an outer rotor and an inner rotor. The outer rotor is rotatably connected to the motor housing, the inner rotor is connected to the motor shaft, and the oil passage is formed between the inner rotor and the outer rotor.

[0014] In the above-mentioned electronic oil pump, it further includes a control board. The motor housing is provided with a control cavity, the control board is located in the control cavity, and the control cavity is communicated with the motor cavity.

[0015] In the above-mentioned electronic oil pump, the control board is provided with a second cooling channel along the axial direction of the motor shaft, and the second cooling channel penetrates through the control board.

[0016] In the above-mentioned electronic oil pump, it further includes a control end cover. The control end cover is connected to the motor housing, the control board is connected to the control end cover, and a total cavity is formed between the control end cover and the motor housing. The total cavity is formed by combining the motor cavity and the control cavity.

[0017] In the above-mentioned electronic oil pump, a cooling gap is formed between the control board and the motor housing.

[0018] In the above-mentioned electronic oil pump, a sealing ring is arranged between the control end cover and the motor housing.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The oil inlet is communicated with the motor cavity through the first oil inlet channel of the pump cover and the second oil inlet channel of the motor shaft, so that the low-pressure cavity communicated with the oil inlet is communicated with the motor cavity of the motor housing and a low pressure is formed in the motor cavity. At the same time, the motor cavity is communicated with the oil inlet through the oil return channel of the motor housing and the oil passage of the rotor assembly. Low-temperature oil is introduced through the oil inlet and high-temperature oil is returned through the oil return channel, realizing double-sided oil suction of the rotor assembly, which helps to improve the volumetric efficiency of the electronic oil pump at high speeds, has a large circulating flow rate, and has a good cooling effect on the motor assembly.

[0021] 2. The second oil inlet channel is set as a cylindrical hollow channel, which can ensure the stability of the second oil inlet channel of the electronic oil pump at high speeds and prevent the oil in the second oil inlet channel from shaking violently.

[0022] 3. The control board is located in the control cavity communicated with the motor cavity, so the oil in the motor cavity can also flow in the control cavity. This electronic oil pump can not only cool the motor assembly but also cool the control board.

[0023] 4. The mover is provided with a first cooling channel penetrating itself along the axial direction of the motor shaft, which further ensures the cooling effect on the motor assembly; the control board is provided with a second cooling channel penetrating itself along the axial direction of the motor shaft, which further ensures the cooling effect on the control board.

[0024] 5. The total chamber is formed by combining the motor chamber and the control chamber. Therefore, during manufacturing, the motor chamber and the control chamber are directly processed and formed as an overall total chamber, which not only saves processing procedures and processing costs, but also is conducive to the cooling of the motor assembly and the control board. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the electronic oil pump of the present invention.

[0026] Figure 2 It is an exploded view of the electronic oil pump of the present invention.

[0027] Figure 3 It is an exploded view of the electronic oil pump of the present invention from another perspective.

[0028] Figure 4 It is a top view of the electronic oil pump of the present invention.

[0029] Figure 5 It is Figure 4 a cross-sectional view taken along the A-A perspective of

[0030] Figure 6 It is Figure 4 a cross-sectional view taken along the B-B perspective of

[0031] In the figure, 100, pump cover; 110, oil inlet; 120, first oil inlet channel; 200, motor housing; 210, motor chamber; 220, oil return channel; 230, control chamber; 310, motor shaft; 311, second oil inlet channel; 320, stator; 330, mover; 331, first cooling channel; 410, oil passage; 420, outer rotor; 430, inner rotor; 500, control board; 510, second cooling channel; 520, cooling gap; 600, control end cover; 700, sealing ring. Detailed Embodiments

[0032] The following are specific embodiments of the present invention in combination with the drawings, and the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0037] The specific embodiments described herein are only illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0038] As Figures 1-6 shown, an electronic oil pump includes: a pump cover 100, a motor housing 200, a motor assembly, and a rotor assembly.

[0039] It is worth noting here that an electronic oil pump is a pump driven by an electric motor and is used to deliver lubricating oil, fuel, or other fluids to various parts of an engine or a mechanical system.

[0040] Compared with traditional mechanical oil pumps, electronic oil pumps have higher efficiency and controllability, and can adjust the oil supply according to actual needs, thereby improving the working efficiency and reliability of the system.

[0041] Among them, the pump cover 100 is provided with an oil inlet 110 and a first oil inlet passage 120.

[0042] Specifically, the pump cover 100 is also provided with an oil outlet.

[0043] This design ensures that the oil can smoothly enter and exit the pump cover, thereby improving the efficiency of the entire system.

[0044] Among them, the motor housing 200 is provided with a motor cavity 210 and an oil return passage 220.

[0045] Such a structural design helps the oil to circulate in the system, reduces resistance and improves the working efficiency.

[0046] Among them, the motor assembly includes a motor shaft 310. The motor shaft 310 is rotatably connected to the motor housing 200. The motor shaft 310 is provided with a second oil inlet passage 311 along its axial direction. The oil inlet 110 is communicated with the motor cavity 210 through the first oil inlet passage 120 and the second oil inlet passage 311.

[0047] This connection method enables the low-pressure oil to smoothly enter the motor cavity, providing a basic condition for subsequent operations.

[0048] Among them, the rotor assembly is located between the pump cover 100 and the motor housing 200. The rotor assembly is formed with an oil passage 410. The motor cavity 210 is communicated with the oil inlet 110 through the oil return passage 220 and the oil passage 410.

[0049] This not only ensures the smooth flow of the oil, but also improves the cooling effect of the system.

[0050] In the prior art, the internal structure of the electric oil pump motor is cooled by external natural cooling, so the cooling effect is poor.

[0051] In this embodiment, the oil inlet 110 is communicated with the motor cavity 210 through the first oil inlet passage 120 of the pump cover 100 and the second oil inlet passage 311 of the motor shaft 310, so that the low-pressure cavity communicated with the oil inlet 110 is communicated with the motor cavity 210 of the motor housing 200 and the motor cavity 210 will form a low pressure. At the same time, the motor cavity 210 is communicated with the oil inlet 110 through the oil return passage 220 of the motor housing 200 and the oil passage 410 of the rotor assembly. The low-temperature oil enters through the oil inlet 110 and the high-temperature oil returns through the oil return passage 220, realizing double-sided oil suction of the rotor assembly, which is helpful for the volumetric efficiency of the electric oil pump at high speeds, has a large circulating flow rate, and has a good cooling effect on the motor assembly.

[0052] Such as Figures 1-6As shown, on the basis of the above-described embodiments, the second oil inlet passage 311 is a cylindrical hollow passage.

[0053] This shape selection is to ensure that the oil does not produce violent sloshing during high-speed rotation, thereby maintaining the stability of the system.

[0054] In this embodiment, setting the second oil inlet passage 311 as a cylindrical hollow passage can ensure the stability of the second oil inlet passage 311 of the electronic oil pump at high rotational speeds and prevent the oil in the second oil inlet passage 311 from violently sloshing.

[0055] As Figures 1-6 shown, on the basis of the above-described embodiments, the motor assembly further includes a stator 320 and a rotor 330. The stator 320 is connected to the motor housing 200, and the rotor 330 is connected to the motor shaft 310.

[0056] This configuration ensures that the motor can operate efficiently and facilitates the maintenance and replacement of components.

[0057] In this embodiment, the stator 320 is connected to the motor housing 200, the rotor 330 is connected to the motor shaft 310, and the rotor 330 can rotate relative to the stator 320.

[0058] As Figures 1-6 shown, on the basis of the above-described embodiments, the rotor 330 is provided with a first cooling passage 331 along the axial direction of the motor shaft 310, and the first cooling passage 331 penetrates the rotor 330.

[0059] This design further improves the cooling effect and ensures that the motor assembly can maintain a good working state even during long-term operation.

[0060] In this embodiment, the rotor 330 is provided with a first cooling passage 331 penetrating itself along the axial direction of the motor shaft 310, further ensuring the cooling effect on the motor assembly.

[0061] As Figures 1-6 shown, on the basis of the above-described embodiments, the rotor assembly includes an outer rotor 420 and an inner rotor 430. The outer rotor 420 is rotatably connected to the motor housing 200, the inner rotor 430 is connected to the motor shaft 310, and the oil passage 410 is formed between the inner rotor 430 and the outer rotor 420.

[0062] This design of the inner and outer rotors not only improves the oil transmission efficiency but also enhances the reliability of the system.

[0063] In this embodiment, the inner rotor 430 can rotate with the motor shaft 310 and drive the eccentric outer rotor 420 to rotate relative to the motor housing 200. The oil passage 410 formed therebetween can not only pump oil from the low-pressure chamber communicated with the oil inlet 110 into the high-pressure chamber communicated with the oil outlet, but also play a role in connecting the first oil inlet passage 120.

[0064] As Figures 1-6 shown, on the basis of the above embodiment, it further includes a control board 500. The motor housing 200 is provided with a control chamber 230. The control board 500 is located in the control chamber 230, and the control chamber 230 communicates with the motor chamber 210.

[0065] Specifically, the control board 500 can be subjected to vapor deposition to form a coating film, thereby isolating the oil.

[0066] This can effectively protect the control board from being eroded by the oil and extend its service life.

[0067] In this embodiment, the control board 500 is located in the control chamber 230 communicating with the motor chamber 210. Therefore, the oil in the motor chamber 210 can also flow in the control chamber 230. This electronic oil pump can not only cool the motor assembly, but also cool the control board 500.

[0068] As Figures 1-6 shown, on the basis of the above embodiment, the control board 500 is provided with a second cooling channel 510 along the axial direction of the motor shaft 310, and the second cooling channel 510 penetrates through the control board 500.

[0069] This design further improves the cooling effect and ensures that the control board 500 can work in an efficient state.

[0070] In this embodiment, the control board 500 is provided with a second cooling channel 510 penetrating through itself along the axial direction of the motor shaft 310, further ensuring the cooling effect on the control board 500.

[0071] As Figures 1-6 shown, on the basis of the above embodiment, it further includes a control end cover 600. The control end cover 600 is connected to the motor housing 200. The control board 500 is connected to the control end cover 600. A total chamber (not marked in the figure) is formed between the control end cover 600 and the motor housing 200, and the total chamber is formed by combining the motor chamber 210 and the control chamber 230.

[0072] This design simplifies the manufacturing process, reduces the cost, and at the same time improves the overall performance of the system.

[0073] In this embodiment, the total chamber is formed by combining the motor chamber 210 and the control chamber 230. Therefore, during manufacturing, the motor chamber 210 and the control chamber 230 are directly processed and formed as an integral total chamber, which not only saves processing procedures and costs but also facilitates the cooling of the motor assembly and the control board 500.

[0074] As Figures 1-6 shown, based on the above embodiment, a cooling gap 520 is formed between the control board 500 and the motor housing 200.

[0075] This design further enhances the cooling effect and ensures the long-term stable operation of the control board 500.

[0076] In this embodiment, the cooling gap 520 formed between the control board 500 and the motor housing 200 further ensures the cooling effect on the control board 500.

[0077] As Figures 1-6 shown, based on the above embodiment, a sealing ring 700 is provided between the control end cover 600 and the motor housing 200.

[0078] This sealing measure can effectively prevent oil leakage and ensure the sealing and safety of the system.

[0079] In this embodiment, the sealing ring 700 provided between the control end cover 600 and the motor housing 200 is to prevent the oil in the control chamber 230 from overflowing. This design not only improves the reliability of the system but also ensures the safe operation of the equipment.

[0080] As Figures 1-6 shown, in terms of the overall working principle, the oil inlet 110 is connected to the motor chamber 210 through the first oil inlet channel 120 of the pump cover 100 and the second oil inlet channel 311 of the motor shaft 310, enabling the low-pressure oil to smoothly enter the motor chamber.

[0081] The motor chamber 210 is connected to the oil inlet 110 through the oil return channel 220 of the motor housing 200 and the oil passage 410 of the rotor assembly, achieving double-sided oil suction, which helps improve the volumetric efficiency of this electronic oil pump at high speeds and increases the circulation flow rate and cooling effect.

Claims

1. An electronic oil pump, characterized in that, Comprising: A pump cover provided with an oil inlet and a first oil inlet passage; A motor housing provided with a motor chamber and an oil return passage; A motor assembly including a motor shaft rotatably connected to the motor housing, the motor shaft being provided with a second oil inlet passage along its axial direction, the oil inlet being communicated with the motor chamber through the first oil inlet passage and the second oil inlet passage; A rotor assembly located between the pump cover and the motor housing, the rotor assembly forming an oil passage, the motor chamber being communicated with the oil inlet through the oil return passage and the oil passage; 2. The electronic oil pump according to claim 1, wherein: The second oil inlet passage is a cylindrical hollow passage.

3. An electronic oil pump according to claim 1, characterized in that: The motor assembly further includes a stator and a rotor, the stator being connected to the motor housing, and the rotor being connected to the motor shaft.

4. The electronic oil pump according to claim 3, characterized in that: The rotor is provided with a first cooling passage along the axial direction of the motor shaft, and the first cooling passage penetrates through the rotor.

5. An electronic oil pump according to claim 1, characterized in that: The rotor assembly includes an outer rotor and an inner rotor, the outer rotor being rotatably connected to the motor housing, the inner rotor being connected to the motor shaft, and the oil passage being formed between the inner rotor and the outer rotor.

6. An electronic oil pump as claimed in claim 1, wherein: It further includes a control board, the motor housing being provided with a control chamber, the control board being located in the control chamber, and the control chamber being communicated with the motor chamber.

7. An electronic oil pump according to claim 6, characterized in that: The control board is provided with a second cooling passage along the axial direction of the motor shaft, and the second cooling passage penetrates through the control board.

8. An electronic oil pump according to claim 6, characterized in that: It further includes a control end cover connected to the motor housing, the control board being connected to the control end cover, and a total chamber being formed between the control end cover and the motor housing, the total chamber being formed by combining the motor chamber and the control chamber.

9. An electronic oil pump according to claim 1, characterized in that: A cooling gap is formed between the control board and the motor housing.

10. An electronic oil pump as claimed in claim 1, characterized in that: A sealing ring is provided between the control end cover and the motor housing.

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