Lightweight structure applied to electronic oil pump

Abstract

A lightweight structure applied to an electronic oil pump comprises a pump cavity, the pump cavity is used for being provided with a rotor, the pump cavity is integrally formed by casting aluminum materials, a motor shell wraps the pump cavity in an injection molding mode, the motor shell and a bottom shell are made of plastic materials, a control panel is further installed in the bottom shell, heat dissipation colloid is arranged on the control panel, and the motor shell and the bottom shell are made of plastic materials. A steel sleeve is assembled on the heat dissipation colloid, a motor stator is further fixedly installed in the bottom shell, a motor rotor is arranged in the steel sleeve, and the motor rotor is fixedly connected with the rotor. According to the electronic oil pump, the pump cavity is formed by casting the aluminum material, the rotor is a powder metallurgy part, the steel sleeve is made of stainless steel, and other structural parts are made of light materials, so that the weight of the electronic oil pump is greatly reduced. And secondly, heat generated in the working process of the control panel is transmitted to the steel sleeve through the heat dissipation colloid, the heat is taken away along with flowing of the lubricating oil, and the stability of the control panel is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of oil pumps, and in particular to a lightweight structure for use in electronic oil pumps. Background Technology

[0002] Electronic oil pumps are widely used in various modern automobiles. The primary function of an oil pump is to deliver lubricating oil to the engine or other mechanical components, ensuring adequate lubrication or combustion. Its working principle involves driving a rotor or diaphragm inside the pump body to create a negative or positive pressure differential, thereby drawing in and discharging liquid.

[0003] However, the existing electronic oil pump motor housing, bottom shell and top cover are all made of die-cast aluminum, which makes the overall weight of the electronic oil pump heavy and the manufacturing cost high; secondly, the control board and controller in the existing control cavity have slow heat dissipation, which affects the lubricating oil supply efficiency of the electronic oil pump. Utility Model Content

[0004] The purpose of this invention is to reduce the overall weight of the electronic oil pump. This is mainly achieved by reducing the structure and material weight, so as to make the overall structure lighter while ensuring the normal operation of the electronic oil pump.

[0005] The present invention adopts the following technical solution:

[0006] A lightweight structure for an electronic oil pump includes a pump chamber for mounting a rotor. The pump chamber is integrally cast from aluminum, and a motor housing is injection molded around the pump chamber. The motor housing is fixedly connected to a bottom shell, and both the motor housing and the bottom shell are made of uniform plastic. A control board is installed inside the bottom shell, and a heat dissipation colloid is provided on the control board. A steel sleeve is fitted onto the heat dissipation colloid, and a channel for supplying lubricating oil is provided between the steel sleeve and the pump chamber. The steel sleeve is also fixedly connected to the motor housing. A motor stator is fixedly installed inside the bottom shell, and a motor rotor is disposed inside the steel sleeve. The motor rotor is fixedly connected to the bottom shell.

[0007] Preferably, the upper part of the pump chamber is also fixedly connected to the top cover by screws, and the top of the pump chamber is flush with the top of the motor housing, and the top of the motor housing is also in contact with the bottom end face of the top cover.

[0008] Preferably, the top cover is further provided with an oil inlet and an oil outlet, and the number of oil inlets is not less than two.

[0009] Preferably, the end face of the motor housing that contacts the top cover is further provided with several arc-shaped weight-reducing grooves to reduce the weight of the motor housing.

[0010] Preferably, the motor housing also has an installation groove inside, which further reduces the weight of the motor housing. The top of the steel sleeve extends into the installation groove, and the edge of the steel sleeve is fixedly connected to the motor housing by a connecting pin.

[0011] Preferably, the steel sleeve is also equipped with a sealing ring made of plastic, which replaces the traditional gasket seal and further reduces the overall weight.

[0012] Preferably, the pump cavity is further provided with a return channel for discharging lubricating oil from the motor cavity.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, the pump chamber is made of die-cast aluminum, the rotor is made of powder metallurgy, and the steel sleeve is made of stainless steel. This is mainly because these components are the main structural components. Other non-main structural components not only use lighter materials, but also further reduce the amount of material used in the structure, which greatly reduces the weight of the overall electronic oil pump.

[0015] 2. The control board of this utility model is fixedly provided with heat dissipation colloid, so that the heat generated by the control board during operation can be transferred to the steel sleeve through the heat dissipation colloid and enter the engine with the lubricating oil, which is beneficial to the heat dissipation of the control board and ensures the stability of the control board. Attached Figure Description

[0016] Figure 1 An exploded view of a lightweight structure used in electronic oil pumps;

[0017] Figure 2 This is a three-dimensional structural diagram of the pump cavity;

[0018] Figure 3 This is a three-dimensional structural diagram of the motor housing;

[0019] Figure 4 This is a three-dimensional structural diagram of the top cover;

[0020] Figure 5 A three-dimensional assembly drawing of a lightweight structure for use in an electronic oil pump;

[0021] Figure 6 This is a cross-sectional view of a lightweight structure used in an electronic oil pump.

[0022] Figure 7 for Figure 6 Enlarged structural diagram of section B in the middle;

[0023] In the diagram: 1. Pump chamber; 2. Rotor; 3. Motor housing; 4. Bottom shell; 5. Control board; 6. Heat dissipation colloid; 7. Steel sleeve; 8. Motor stator; 9. Motor rotor; 10. Top cover; 11. Screw; 12. Oil inlet; 13. Oil outlet; 14. Arc-shaped weight reduction groove; 15. Mounting groove; 16. Connecting pin; 17. Sealing ring; 18. Return channel; 19. Hollow shaft; 20. Inner rotor; and 21. Outer rotor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1:

[0026] Reference Figure 1-7 A lightweight structure for an electronic oil pump includes a pump chamber 1 for mounting a rotor 2. The pump chamber 1 is integrally cast from aluminum, and a motor housing 3 is injection molded to encapsulate the pump chamber 1, forming a single integral structure. The motor housing 3 is fixedly connected to a bottom housing 4, and both the motor housing 3 and the bottom housing 4 are made of uniform plastic material, primarily PA66, PPS, and PPA, which reduces the overall weight of the electronic oil pump. A control board 5 is installed inside the bottom housing 4, and a heat dissipation colloid 6 is provided on the control board 5. A steel sleeve 7, made of stainless steel, is fitted onto the heat dissipation colloid 6. A channel for conveying lubricating oil, which is a hollow shaft 19, is provided between the steel sleeve 7 and the pump chamber 1. The steel sleeve 7 is also fixedly connected to the motor housing 3. A motor stator 8 is also fixedly installed inside the bottom housing 4, and a motor rotor 9 is housed inside the steel sleeve 7, with the motor rotor 9 fixedly connected to the rotor 2.

[0027] The rotor 2 includes an inner rotor 20 and an outer rotor 21. The inner rotor 20 is fixedly connected to the motor rotor 9 via a hollow shaft 19. During operation, the motor rotor 9 rotates inside the steel sleeve 7 under the action of the motor stator 8. This causes the inner rotor 20 to draw lubricating oil from the oil tank. The lubricating oil enters the steel sleeve 7 through the hollow shaft 19 and is finally discharged from the oil outlet 13 through the return channel 18. During this process, the steel sleeve 7 isolates the lubricating oil, preventing it from entering the control chamber. This ensures that the motor stator 8 and the control board 5 are not affected by the lubricating oil. Furthermore, the heat generated by the control board 5 is transferred to the steel sleeve 7 through the heat dissipation colloid 6. The steel sleeve 7 dissipates the heat through the flow of lubricating oil, thus ensuring the stability of the control board 5 during operation, not affecting the lubricating oil supply efficiency, and extending its service life.

[0028] The upper part of the pump chamber 1 is also fixedly connected to the top cover 10 by a screw 11. The top cover 10 is made of plastic, and the top of the pump chamber 1 is flush with the top of the motor housing 3. The top of the motor housing 3 is also in contact with the bottom end face of the top cover 10.

[0029] The top cover 10 is also provided with an oil inlet 12 and an oil outlet 13, and the number of oil inlets 12 is not less than two. In order to make the oil intake faster, the number of oil inlets 12 can be increased or decreased as needed.

[0030] Example 2:

[0031] See Figure 3 The difference from Embodiment 1 is that the end face of the motor housing 3 that contacts the top cover 10 is also provided with several arc-shaped weight reduction grooves 14. The arc-shaped weight reduction grooves 14 reduce the overall weight of the motor housing 3 and facilitate the installation of the top cover 10.

[0032] The motor housing 3 also has an installation groove 15 inside. The installation groove 15 further reduces the weight of the motor housing 3. The top of the steel sleeve 7 extends into the installation groove 15. The edge of the steel sleeve 7 is also fixedly connected to the motor housing 3 by a connecting pin 16, which fixes the steel sleeve 7 in the installation groove 15 and plays an isolation role. This can prevent lubricating oil from entering the control cavity, thereby causing damage to the control board 5 and the controller. In addition, the aluminum steel sleeve 7 can ensure stable oil pressure and will not deform during the rotation of the motor rotor 9.

[0033] See Figure 7 The steel sleeve 7 is also equipped with a sealing ring 17, which is made of plastic and replaces the traditional gasket seal. The main function of the sealing ring 17 is to seal and prevent lubricating oil from entering between the bottom shell 4 and the steel sleeve 7. Secondly, the sealing ring 17 is lighter than metal sealing gaskets, thus further reducing the overall weight of the electronic oil pump.

[0034] See Figure 2 The pump chamber 1 is also provided with a return channel 18 for discharging lubricating oil.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lightweight structure applied to an electric oil pump, characterized by: Including pump cavity (1), the pump cavity (1) is used to fit rotor (2), the pump cavity (1) is integrally casted by aluminum material, and the motor shell (3) injection wraps pump cavity (1), the motor shell (3) is fixedly connected with bottom shell (4), and the motor shell (3) and bottom shell (4) are even plastic material, the bottom shell (4) is further installed control board (5) inside, the control board (5) is provided with heat dissipation gel (6), the heat dissipation gel (6) is fitted with steel sleeve (7), the steel sleeve (7) is stainless steel, the steel sleeve (7) and pump cavity (1) between there is the channel of conveying lubricating oil, and the steel sleeve (7) is further fixedly connected with motor shell (3), the bottom shell (4) is further fixedly installed motor stator (8) inside, the steel sleeve (7) is provided with motor rotor (9) inside, and the motor rotor (9) is fixedly connected with rotor (2).

2. The lightweight structure for an electric oil pump according to claim 1, characterized by: The upper portion of the pump cavity (1) is further fixedly connected with the top cover (10) through the screw rod (11), and the top cover (10) is made of plastic material, and the top of the pump cavity (1) is flush with the top of the motor shell (3), and the top of the motor shell (3) is further in contact with the bottom end surface of the top cover (10).

3. The lightweight structure for an electric oil pump according to claim 2, characterized in that: The top cover (10) is further provided with an oil inlet (12) and an oil outlet (13), and the number of the oil inlet (12) is not less than two.

4. The light-weight structure for an electric oil pump according to claim 2, characterized in that: The end surface of the motor shell (3) in contact with the top cover (10) is further provided with a plurality of arc-shaped lightening grooves (14).

5. The lightweight structure for an electric oil pump according to claim 1, characterized in that: The motor shell (3) is further provided with an installation groove (15) inside, the top of the steel sleeve (7) extends into the installation groove (15), and the edge of the steel sleeve (7) is further fixedly connected with the motor shell (3) through the connecting pin (16).

6. The lightweight structure for an electric oil pump according to claim 1, characterized in that: The steel sleeve (7) is further fitted with a sealing ring (17), and the sealing ring (17) is made of plastic material.

7. The lightweight structure for an electric oil pump according to claim 1, characterized in that: The pump cavity (1) is further provided with a backflow channel (18).

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