Electronic oil pump with stable structure

Abstract

An electronic oil pump stable in structure comprises a top cover, a pump body shell and a bottom shell, an oil inlet and an oil outlet are formed in the top cover, the top cover is connected with the pump body shell through a screw rod, the bottom shell is arranged below the pump body shell, a control panel is arranged in the bottom shell, a motor stator is arranged on the control panel, a stator support is arranged in the motor stator, and a motor is arranged in the stator support. The upper end of the stator bracket is provided with three bulges, the three bulges are uniformly distributed on the upper surface of the stator bracket, the three bulges are provided with springs, the springs are fixed on the stator bracket through an injection molding process, and the springs are provided with three bulges; the three protrusions of the spring penetrate through the opening of the steel sleeve and correspond to the limiting grooves of the protruding blocks in the pump body shell, the stability of the motor stator in the operation process is guaranteed through the structural design, vibration and displacement are reduced, connection and matching among all components are tighter and more reasonable, and the service life of the motor is prolonged. And the stability and the reliability of the whole device during operation can be improved.

Description

A structurally stable electronic oil pump Technical Field

[0001] This utility model relates to the field of electronic oil pump technology, and in particular to an electronic oil pump with a stable structure. Background Technology

[0002] Electronic oil pumps are widely used in various modern automobiles, especially in the field of new energy vehicles. Electronic oil pumps are mainly divided into fuel pumps and lubrication pumps according to their uses. Fuel pumps are mainly used in internal combustion engine vehicles and are responsible for delivering fuel from the fuel tank to the engine. Lubrication pumps are used in various mechanical systems to force the circulation of lubricating oil to reduce wear, cool parts, and clean friction surfaces. The lubrication pumps in new energy vehicles are mainly electronic oil pumps. Their working principle is to drive the rotor inside the pump body to move, thereby drawing in and pumping out engine oil to help lubricate and cool the electric drive system.

[0003] In existing three-in-one electronic oil pump designs, the stator is usually placed directly inside the housing, which can cause shaking after prolonged use. Furthermore, the limited space within the pump's controller cavity prevents the temperature sensor from being placed close to the rotor cavity. The plastic used for stator injection molding has low thermal conductivity, making it difficult for the temperature sensor on the controller board to accurately obtain the oil temperature flowing into the pump cavity. To address these issues, a structurally stable electronic oil pump is proposed. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a structurally stable electronic oil pump, comprising a top cover, a pump body shell, and a bottom shell. The top cover has an oil inlet and an oil outlet, and is connected to the pump body shell via screws. The bottom shell is located below the pump body shell, and a control board is located inside the bottom shell. A motor stator is located on the control board, and a stator support is located inside the motor stator. The stator support has three protrusions at its upper end, evenly distributed on its upper surface, and springs are mounted on the three protrusions. The springs are fixed to the stator support by injection molding. The motor rotor is located inside the motor stator, and a hollow shaft is fixedly located in the middle of the motor rotor. The pump body rotor is located at the upper end of the hollow shaft and is situated inside the pump body shell. The pump body shell has three protrusions, each with a limiting groove. The three protrusions of the springs correspond to the three limiting grooves.

[0005] Furthermore, an oil temperature sensor is provided on the control board, a heat dissipation colloid is fixedly provided on the control board, and a steel sleeve is fixedly provided on the heat dissipation colloid, with the steel sleeve located between the motor stator and the motor rotor;

[0006] Furthermore, the oil temperature sensor is located on the side of the control board near the steel sleeve, and is used to detect the temperature of the control board;

[0007] Furthermore, there is a gap between the bottom end of the hollow shaft and the steel sleeve, which allows lubricating oil to enter the steel sleeve to cool the control board, and the upper end of the hollow shaft is connected to the oil inlet of the top cover.

[0008] Furthermore, there is a sealing ring between the upper edge of the steel sleeve and the pump body housing, and there is an oil return channel at the connection between the steel sleeve and the pump body housing, which is used to send the lubricating oil that flows into the inside of the steel sleeve to carry away heat to the pump rotor. The upper edge of the steel sleeve has three openings for the three protrusions of the spring to extend out.

[0009] Furthermore, the pump body rotor has an internal and external double gear structure for pumping lubricating oil, and the pump body rotor is connected to the oil outlet of the top cover.

[0010] Furthermore, the control board is fixed on the bottom shell and connected to an external controller. The motor stator is connected to the circuit on the control board through terminals. The control board controls the motor stator to be energized, driving the motor rotor to rotate.

[0011] The beneficial effects of this utility model are:

[0012] This invention, by installing an oil temperature sensor on the control board, can monitor the temperature of the control board in real time, facilitating timely understanding of the device's operating temperature status and early detection of potential overheating and other abnormalities, thus ensuring stable and safe operation of the device. A heat dissipation colloid and a steel sleeve are installed between the control board and the motor stator and rotor. The gap between the hollow shaft and the steel sleeve allows lubricating oil to enter the steel sleeve and carry away heat, forming an effective heat dissipation path. This significantly reduces the temperature of the control board and related components during operation, improves the overall heat dissipation efficiency of the device, extends the service life of each component, and reduces the risk of failure due to overheating. The oil return channel at the connection between the steel sleeve and the pump housing rationally returns the heat-carrying lubricating oil to the pump rotor for recycling, further optimizing the heat dissipation process and improving the efficiency of the entire lubricating oil circulation and heat dissipation system.

[0013] The spring is fixed to the stator bracket by injection molding, and the spring protrusion corresponds to the limiting groove of the protrusion inside the pump body. This structural design not only ensures the stability of the motor stator during operation and reduces vibration and displacement, but also makes the connection and cooperation between the components more tight and reasonable, which helps to improve the stability and reliability of the whole device during operation.

[0014] The motor stator is radially interference-fitted with the plastic stator housing, resulting in a more stable structure compared to the previous heat-fitting process. Attached Figure Description

[0015] Figure 1 is an exploded structural diagram of a structurally stable electronic oil pump according to this utility model;

[0016] Figure 2 is a schematic diagram of the overall structure of a stable electronic oil pump according to this utility model.

[0017] Figure 3 is a side view of the overall structure of a structurally stable electronic oil pump according to this utility model.

[0018] Figure 4 is a schematic diagram of the internal structure of a structurally stable electronic oil pump according to this utility model.

[0019] Figure 5 is a partial structural schematic diagram of a stable electronic oil pump according to the present invention;

[0020] As shown in the figure: 1. Top cover; 2. Pump body shell; 3. Bottom shell; 4. Control board; 5. Oil temperature sensor; 6. Heat dissipation colloid; 7. Steel sleeve; 8. Motor stator; 9. Stator bracket; 10. Spring; 11. Motor rotor; 12. Hollow shaft; 13. Pump body rotor; 14. Protrusion; 15. Limiting groove; 16. Oil inlet; 17. Oil outlet. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1

[0025] This utility model provides a structurally stable electronic oil pump, including a top cover 1, a pump body shell 2, and a bottom shell 3. The top cover 1 is provided with an oil inlet 16 and an oil outlet 17. The top cover 1 is connected to the pump body shell 2 by a screw. The bottom shell 3 is located below the pump body shell 2. A control board 4 is located inside the bottom shell 3. A motor stator 8 is located on the control board 4. A stator support 9 is located inside the motor stator 8. The stator support 9 has three protrusions on its upper end, which are evenly distributed on the upper surface of the stator support 9. A spring 10 is provided on the upper part of the stator. The spring 10 is fixed to the stator bracket 9 by injection molding. The spring 10 has three protrusions. A motor rotor 11 is provided inside the motor stator 8. A hollow shaft 12 is fixed in the middle of the motor rotor 11. A pump body rotor 13 is provided at the upper end of the hollow shaft 12. The pump body rotor 13 is located inside the pump body shell 2. There are three protrusions 14 inside the pump body shell 2. Each protrusion 14 has a limiting groove 15. The three protrusions of the spring 10 correspond to the three limiting grooves 15.

[0026] Furthermore, an oil temperature sensor 5 is installed on the control board 4, a heat dissipation colloid 6 is fixedly installed on the control board 4, and a steel sleeve 7 is fixedly installed on the heat dissipation colloid 6. The steel sleeve 7 is located between the motor stator 8 and the motor rotor 11.

[0027] Furthermore, the oil temperature sensor 5 is located on the side of the control board 4 near the steel sleeve 7, and is used to detect the temperature of the control board 4;

[0028] Furthermore, there is a gap between the bottom end of the hollow shaft 12 and the steel sleeve 7, which allows lubricating oil to enter the steel sleeve 7 to cool the control plate 4. The upper end of the hollow shaft 12 is connected to the oil inlet 16 of the top cover 1.

[0029] Furthermore, there is a sealing ring between the upper edge of the steel sleeve 7 and the pump body shell 2, and there is an oil return channel at the connection between the steel sleeve 7 and the pump body shell 2, which is used to send the lubricating oil that flows into the interior of the steel sleeve 7 to carry away heat to the pump body rotor 13. The upper edge of the steel sleeve 7 has three openings for the three protrusions of the spring 10 to extend out.

[0030] Furthermore, the pump body rotor 13 has an internal and external double gear structure for pumping lubricating oil, and the pump body rotor 13 is connected to the oil outlet 17 of the top cover 1.

[0031] Furthermore, the control board 4 is fixed on the bottom shell 3 and connected to an external controller. The motor stator 8 is connected to the circuit on the control board 4 through terminals. The control board 4 controls the motor stator 8 to be energized, driving the motor rotor 11 to rotate.

[0032] The working process of this device is as follows:

[0033] In use, the top cover 1 is connected to the pump body housing 2 via screws to ensure a secure connection. An oil inlet 16 and an oil outlet 17 are provided on the top cover 1 for lubricating oil to enter and exit. A bottom housing 3 is installed below the pump body housing 2, forming the main outer shell structure of the device. Springs 10 are fixedly installed on the three protrusions of the stator bracket 9 using injection molding, ensuring that each spring 10 has three protrusions and is in a functional state. A control board 4 is fixedly placed inside the bottom housing 3, and the motor stator 8 is installed on the control board 4 via terminals, ensuring the motor stator 8 is in the appropriate position. The motor rotor 11, hollow shaft 12, and steel sleeve 7 are installed inside the motor stator 8. The bottom housing 3 and top cover 2 are then connected. The cover 1 and the pump body shell 2 form the outer shell main structure. At this time, the three protrusions of the spring 10 abut against the limiting groove 15 of the protrusion 14 inside the pump body shell 2. The limiting groove 15 of the pump body shell 2 limits the motor stator 8 and keeps the motor stator 8 stable. At the same time, there is a sealing ring between the upper edge of the steel sleeve 7 and the pump body shell 2. There is an oil return channel between the steel sleeve 7 and the pump body shell 2. The lubricating oil that flows into the steel sleeve 7 to carry away heat is sent to the pump body rotor 13. The front end of the hollow shaft 12 is connected to the oil inlet 16 of the top cover 1. The lubricating oil passes through the hollow shaft 12 from the oil inlet 16 and enters the steel sleeve 7. Then it flows into the pump body rotor 13 through the oil return channel between the steel sleeve 7 and the pump body shell 2.

[0034] When the device starts working, the external controller powers the motor stator 8 through the control board 4. The motor stator 8 generates a magnetic field that drives the motor rotor 11 to rotate. The motor rotor 11 drives the hollow shaft 12 to rotate, and the hollow shaft 12 further drives the pump body rotor 13 to rotate. Since the pump body rotor 13 has an internal and external double gear structure, it starts pumping lubricating oil. The lubricating oil enters from the oil inlet 16 of the top cover 1 and flows downward along the hollow shaft 12. Some of the lubricating oil enters the steel sleeve 7 through the gap between the bottom end of the hollow shaft 12 and the steel sleeve 7, cooling the control board 4. At the same time, the oil temperature sensor 5 detects the temperature near the control board 4 in real time and feeds back the temperature information. The lubricating oil that enters the steel sleeve 7 and carries away the heat is sent to the pump body rotor 13 through the oil return channel at the connection between the steel sleeve 7 and the pump body shell 2. Finally, the lubricating oil flows out from the oil outlet 17 of the top cover 1, completing the entire process of pumping and cooling the lubricating oil.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A structurally stable electronic oil pump, comprising a top cover (1), a pump body shell (2), and a bottom shell (3), characterized in that, The top cover (1) is provided with an oil inlet (16) and an oil outlet (17). The top cover (1) is connected to the pump body shell (2) by a screw. A bottom shell (3) is provided below the pump body shell (2). A control board (4) is provided inside the bottom shell (3). A motor stator (8) is provided on the control board (4). A stator bracket (9) is provided inside the motor stator (8). The stator bracket (9) has three protrusions at its upper end. The three protrusions are evenly distributed on the upper surface of the stator bracket (9). Springs (10) are provided on the three protrusions. The springs (10) are connected by a screw. The spring (10) is fixed on the stator bracket (9) by injection molding process. The spring (10) has three protrusions. The motor rotor (11) is set inside the motor stator (8). A hollow shaft (12) is fixed in the middle of the motor rotor (11). A pump body rotor (13) is set at the upper end of the hollow shaft (12). The pump body rotor (13) is located inside the pump body shell (2). There are three protrusions (14) inside the pump body shell (2). Each protrusion (14) has a limiting groove (15). The three protrusions of the spring (10) correspond to the three limiting grooves (15).

2. The electronic oil pump with stable structure according to claim 1, characterized in that, An oil temperature sensor (5) is provided on the control board (4), a heat dissipation colloid (6) is fixedly provided on the control board (4), and a steel sleeve (7) is fixedly provided on the heat dissipation colloid (6). The steel sleeve (7) is located between the motor stator (8) and the motor rotor (11).

3. The electronic oil pump with stable structure according to claim 2, characterized in that, The oil temperature sensor (5) is located on the side of the control board (4) near the steel sleeve (7) and is used to detect the temperature of the control board (4).

4. A structurally stable electric oil pump according to claim 3, characterized in that There is a gap between the bottom end of the hollow shaft (12) and the steel sleeve (7) for lubricating oil to enter the steel sleeve (7) to cool the control plate (4). The upper end of the hollow shaft (12) is connected to the oil inlet (16) of the top cover (1).

5. The structurally stable electronic oil pump according to claim 4, characterized in that, There is a sealing ring between the upper edge of the steel sleeve (7) and the pump body shell (2). There is an oil return channel at the connection between the steel sleeve (7) and the pump body shell (2) for sending the lubricating oil that flows into the interior of the steel sleeve (7) to carry away heat to the pump body rotor (13). There are three openings on the upper edge of the steel sleeve (7) for the three protrusions of the spring (10) to extend out.

6. The structurally stable electronic oil pump according to claim 5, characterized in that, The pump body rotor (13) has an internal and external double gear structure and is used to pump lubricating oil. The pump body rotor (13) is connected to the oil outlet (17) of the top cover (1).

7. The structurally stable electronic oil pump according to claim 6, characterized in that, The control board (4) is fixed on the bottom shell (3) and is connected to an external controller.

8. The structurally stable electronic oil pump according to claim 7, characterized in that, The motor stator (8) is connected to the circuit on the control board (4) through terminals. The control board (4) controls the motor stator (8) to be energized, driving the motor rotor (11) to rotate.

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