Novel electronic oil pump tooling

Abstract

The utility model provides a novel electronic oil pump tool, including integral shell, the one end of integral shell is provided with the pump cover, the surface of pump cover is equipped with the pump head sealing washer and the casing sealing washer, the one end of integral shell in is close to the pump cover and is provided with the outer rotor and inner rotor, the other end in integral shell is provided with the stator core, the middle part of stator core is provided with the hollow shaft, the one end of integral shell away from the pump cover is provided with the electric control cover plate, the side of electric control cover plate close to integral shell is provided with PCBA, the surface of PCBA is provided with the sealing element, the surface of sealing element is equipped with the cover plate sealing washer, the sealing element sets up on the surface of PCBA, the utility model changes the one side of PCBA facing the wet cavity from complete sealing to partial or all exposure in the cooling medium, increases the sealing surface on the one side of PCBA facing the wet cavity, ensures that other parts of PCBA still are in dry cavity, and the area of PCBA exposed in the cooling medium.

Description

Technical Field

[0001] This utility model belongs to the field of electronic oil pumps, specifically a new type of electronic oil pump tooling. Background Technology

[0002] With the rapid development of the automotive industry, electronic oil pumps are widely used in vehicle lubrication and / or cooling systems. These pumps primarily provide power to these systems. An electronic oil pump mainly consists of three main components: a PCBA (motor controller), a motor, and a hydraulic system, along with an external housing. The hydraulic system and motor typically share a common cavity, which is used for cooling and lubrication and can be called the wet cavity. The PCBA is usually sealed in a separate cavity, called the dry cavity. A special assembly connects the dry and wet cavities, sealing both cavities and connecting the PCBA and the electrical components of the motor within both cavities. The electronic oil pump primarily provides power to the vehicle's lubrication and / or cooling systems. Its internal structure typically includes a rotor assembly. During operation, impurities may accumulate on the rotor assembly, affecting the pump's performance. The electronic oil pump also includes an electronic control board assembly, which contains electronic components. During use, the electronic control board assembly may generate electromagnetic radiation.

[0003] Existing electronic oil pumps have a complex structure and use a heat-shrink assembly process to assemble the separate motor stator with the pump body. This heat-shrink assembly process has disadvantages such as high efficiency and scrap rate, poor heat dissipation, and technical problems such as increased energy consumption and reduced motor efficiency due to poor heat dissipation. In the original PCBA dry cavity design, power devices such as MOSFETs could only be placed on the side of the PCBA facing the top cover. The heat generated by these devices during operation had to be dissipated into the air through thermal conduction via a thermal pad or adhesive placed between the device's surface and the top cover of the electronic oil pump. This method resulted in low heat dissipation efficiency, and larger-sized components were required for the MOSFETs and other power devices.

[0004] To achieve direct oil temperature detection, a special pin needs to be added to the isolation component, with one end connected to the PCBA and the other end connected to a special temperature sensor. This solution is complex and has low reliability.

[0005] In summary, this utility model provides a novel electronic oil pump tooling to solve the above-mentioned problems. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a novel electronic oil pump tooling to solve the problems of complex processes and low reliability in existing technologies where direct oil temperature detection requires adding a dedicated pin to the isolation component, with one end connected to the PCBA and the other end to a dedicated temperature sensor.

[0007] A novel electronic oil pump fixture includes an integral housing. One end of the integral housing is provided with a pump cover. A pump head sealing ring and a housing sealing ring are fitted on the surface of the pump cover. An outer rotor and an inner rotor are provided inside the integral housing near the pump cover. A stator core is provided inside the integral housing at the other end. A hollow shaft is provided in the middle of the stator core. An electronic control cover plate is provided on the end of the integral housing away from the pump cover. A PCBA is provided on the side of the electronic control cover plate near the integral housing. A sealing element is provided on the surface of the PCBA. A cover plate sealing ring is fitted on the surface of the sealing element. The sealing element is located on the surface of the PCBA.

[0008] Furthermore, the surface of the pump cover is fixedly connected to the surface of the integral shell by multiple self-tapping screws, the pump head sealing ring and the shell sealing ring are located on the pump cover at the end away from the integral shell, and a filter screen is installed inside the pump cover.

[0009] Furthermore, a position sensor is mounted on the surface of the seal, the seal is disposed on the surface of the electronic control cover, and the PCBA is disposed inside the electronic control cover.

[0010] Furthermore, the hollow shaft movably passes through the middle of the rotor core and the integral shell, and is connected to the inner rotor.

[0011] A novel solution for sealing and heat dissipation of the PCBA in an electronic oil pump fixture includes the following steps: Step 1: Place the PCBA at one end near the electrical control cover. Add a seal to the side of the PCBA facing the wet cavity. The seal is sealed around the seal by the cover sealing ring. The seal covers the surface of the PCBA, which is the wet cavity side. Seal one side of the PCBA inside the electrical control cover, which is the dry cavity side, to ensure that the other parts of the PCBA are in the dry cavity. Step 2: During the use of the oil pump, the side of the PCBA near the wet chamber is completely immersed in the coolant of the oil pump for direct cooling. Step 3: Install a thermistor on the PCBA to detect the temperature of the cooling medium.

[0012] Furthermore, the integrated housing is filled with coolant, which is in direct contact with the wet cavity surface of the PCBA.

[0013] Furthermore, the sidewall of the seal is in contact with the inner wall of the electronic control cover, and the seal is in contact with the surface of the PCBA via a pressing block.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model changes the side of the PCBA facing the wet cavity from being completely sealed to being partially or completely exposed to the cooling medium. A sealing surface is added to the side of the PCBA facing the wet cavity to ensure that other parts of the PCBA are still in the dry cavity, and the area of ​​the PCBA exposed to the cooling medium.

[0015] 2. This utility model improves heat dissipation capacity by directly cooling the PCBA facing the wet cavity side, which can improve the low-temperature start-up characteristics of the oil pump while reducing costs. The temperature of the cooling medium is detected by the thermistor on the PCBA, which greatly improves the detection response, accuracy and reliability, and reduces the cost of medium detection.

[0016] 3. In this utility model, the side of the PCBA facing the wet cavity is partially or completely immersed in the coolant of the oil pump. The side of the PCBA facing the wet cavity is sealed with the isolation chamber. The part of the PCBA immersed in the coolant may be completely free of devices, or may be partially equipped with devices that meet the media compatibility requirements (including thermistors, MOS devices, etc.), or the surface of the devices may be coated with a special material to meet the media compatibility requirements. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the entire utility model; Figure 2 This is an exploded view of this utility model.

[0018] In the picture: 1. Integrated housing; 2. Pump head sealing ring; 3. Housing sealing ring; 4. Self-tapping screw; 5. Pump cover; 6. Inner rotor; 7. Outer rotor; 8. Stator core; 9. Rotor core; 10. Hollow shaft; 11. Position sensor; 12. Cover plate sealing ring; 13. Seal; 14. PCBA; 15. Electrical control cover plate. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] like Figure 1-2As shown, this utility model provides a novel electronic oil pump tooling, including an integral housing 1. One end of the integral housing 1 is provided with a pump cover 5. The surface of the pump cover 5 is fitted with a pump head sealing ring 2 and a housing sealing ring 3. An outer rotor 7 and an inner rotor 6 are provided inside the integral housing 1 near the pump cover 5. The other end of the integral housing 1 is provided with a stator core 8. A hollow shaft 10 is provided in the middle of the stator core 8. An electronic control cover plate 15 is provided on the end of the integral housing 1 away from the pump cover 5. A PCBA 14 is provided on the side of the electronic control cover plate 15 near the integral housing 1. A sealing element 13 is provided on the surface of the PCBA 14. A cover plate sealing ring 12 is fitted on the surface of the sealing element 13. The sealing element 13 is provided on the surface of the PCBA 14.

[0021] In one embodiment of this utility model, the surface of the pump cover 5 is fixedly connected to the surface of the integral shell 1 by a plurality of self-tapping screws 4, the pump head sealing ring 2 and the shell sealing ring 3 are disposed on the pump cover 5 at the end away from the integral shell 1, and a filter screen is installed inside the pump cover 5.

[0022] In one embodiment of this utility model, a position sensor 11 is mounted on the surface of the sealing member 13, the sealing member is disposed on the surface of the electronic control cover plate 15, and the PCBA 14 is disposed inside the electronic control cover plate 15.

[0023] In one embodiment of this utility model, the hollow shaft 10 movably passes through the middle of the rotor core 9 and the integral shell 1, and is connected to the inner rotor 6.

[0024] A novel solution for sealing and heat dissipation of the PCBA in an electronic oil pump fixture includes the following steps: Step 1: Set PCBA14 at one end near the electrical control cover 15. A sealing element 13 is added to the side of PCBA14 facing the wet cavity. The sealing element 13 is sealed around the cover sealing ring 12. The sealing element 13 covers the surface of PCBA14, which is the wet cavity surface. Seal one side of PCBA14 inside the electrical control cover 15, which is the dry cavity surface, to ensure that the other parts of PCBA14 are in the dry cavity. Step 2: During the use of the oil pump, the side of PCBA14 near the wet chamber is completely immersed in the oil pump's coolant for direct cooling. Step 3: Install a thermistor on PCBA14 to detect the temperature of the cooling medium.

[0025] In one embodiment of this utility model, the integrated shell 1 is filled with coolant, and the coolant is in direct contact with the wet cavity surface of PCBA14.

[0026] In one embodiment of this utility model, the side wall of the sealing member 13 is in contact with the inner wall of the electronic control cover plate 15, and the sealing member 13 is in contact with the surface of the PCBA 14 through the pressing block.

[0027] This invention changes the completely sealed side of PCBA14 facing the wet cavity to partially or completely exposed to the cooling medium. A sealing surface is added to this side of PCBA14 to ensure the rest of PCBA14 remains in the dry cavity. Direct cooling of the area of ​​PCBA14 exposed to the cooling medium improves heat dissipation, enhancing the low-temperature start-up characteristics of the oil pump while reducing costs. Temperature detection of the cooling medium is performed using a thermistor on PCBA14, significantly improving detection response, accuracy, and reliability, and reducing the cost of medium-to-medium temperature detection. The side of PCBA14 facing the wet cavity is partially or completely immersed in the oil pump's coolant. This side of PCBA14 is sealed to the isolation chamber. The portion of PCBA14 immersed in the coolant can be completely devoid of components, or contain components that meet media compatibility requirements (including thermistors, MOS devices, etc.), or have their surfaces coated with a special material to meet media compatibility requirements.

[0028] During use, PCBA14 is positioned at the end near the electronic control cover 15. A sealing element 13 is added to the side of PCBA14 facing the wet cavity. The sealing element 13 is sealed around the cover sealing ring 12. The sealing element 13 covers the surface of PCBA14, which is the wet cavity surface. One side of PCBA14 is sealed inside the electronic control cover 15, which is the dry cavity surface, ensuring that the other parts of PCBA14 are in the dry cavity. During the use of the oil pump, the side of PCBA14 near the wet cavity is completely immersed in the coolant of the oil pump for direct cooling. A thermistor is installed on PCBA14 to detect the temperature of the cooling medium. The integrated housing 1 is filled with coolant, which is in direct contact with the wet cavity surface of PCBA14. The side wall of the sealing element 13 is in contact with the inner wall of the electronic control cover 15. The sealing element 13 is in contact with the surface of PCBA14 through the pressure block.

[0029] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 according to the specific circumstances.

[0031] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

[0032] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

Claims

1. A novel electronic oil pump tooling, comprising an integral housing (1), characterized in that: One end of the integrated shell (1) is provided with a pump cover (5), and the surface of the pump cover (5) is fitted with a pump head sealing ring (2) and a shell sealing ring (3). The inner end of the integrated shell (1) near the pump cover (5) is provided with an outer rotor (7) and an inner rotor (6). The other end of the integrated shell (1) is provided with a stator core (8). The middle part of the stator core (8) is provided with a hollow shaft (10). The end of the integrated shell (1) away from the pump cover (5) is provided with an electrical control cover plate (15). The side of the electrical control cover plate (15) near the integrated shell (1) is provided with a PCBA (14). The surface of the PCBA (14) is provided with a sealing element (13). The surface of the sealing element (13) is fitted with a cover plate sealing ring (12). The sealing element (13) is provided on the surface of the PCBA (14).

2. The novel electronic oil pump tooling as described in claim 1, characterized in that: The surface of the pump cover (5) is fixedly connected to the surface of the integral shell (1) by multiple self-tapping screws (4). The pump head sealing ring (2) and the shell sealing ring (3) are set on the pump cover (5) at one end away from the integral shell (1). A filter screen is installed inside the pump cover (5).

3. The novel electronic oil pump tooling as described in claim 1, characterized in that: A position sensor (11) is mounted on the surface of the seal (13), the seal is disposed on the surface of the electronic control cover plate (15), and the PCBA (14) is disposed inside the electronic control cover plate (15).

4. The novel electronic oil pump tooling as described in claim 1, characterized in that: The hollow shaft (10) extends through the middle of the rotor core (9) and the integral shell (1) and is connected to the inner rotor (6).

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