Electronic oil pump

Abstract

An electronic oil pump comprises a pump housing, a first rotor assembly, a stator assembly, an electric control board assembly and a partition, the pump housing is capable of forming a pump inner cavity, the pump inner cavity comprises a first cavity, a second cavity and a third cavity, the first rotor assembly is located in the first cavity, the stator assembly is arranged in the second cavity, the electric control board assembly is arranged in the third cavity, the first cavity is communicated with the second cavity, and the second cavity is not communicated with the third cavity; the second cavity is located on one side of a main body part of the partition, and the third cavity is located on the other side of the main body part of the partition; the electronic oil pump further comprises a first heat conduction member, a temperature sensing unit and a second heat conduction member, the first heat conduction member comprises a first part and a second part, the first part is located in the second cavity, and the second part is located in the third cavity; the temperature sensing unit and the second heat conduction member are located in the third cavity, the temperature sensing unit is electrically connected with the electric control board assembly, at least part of the second heat conduction member is located between the temperature sensing unit and the second part, and the temperature sensing unit is capable of detecting the temperature of the second heat conduction member; thus, the system structure is simplified.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more particularly to components of vehicle lubrication and / or cooling systems. Background Technology

[0002] The electronic oil pump mainly provides a power source for the vehicle's lubrication and / or cooling systems. The operating status of the electronic oil pump is related to the oil temperature. In order to detect the oil temperature in the electronic oil pump, a temperature sensor is installed on the inlet pipe of the electronic oil pump to detect the oil temperature. The temperature sensor is connected to the system's control unit through a wiring harness, which involves mechanical and electrical connections of the temperature sensor, resulting in a relatively complex system structure. Summary of the Invention

[0003] The purpose of this application is to provide an electronic oil pump that simplifies the system structure.

[0004] To achieve the above objectives, one embodiment of this application adopts the following technical solution:

[0005] An electronic oil pump includes a pump housing, a first rotor assembly, a stator assembly, and an electronic control board assembly. The pump housing forms a pump cavity, which includes a first cavity, a second cavity, and a third cavity. The first rotor assembly is located in the first cavity, the stator assembly is disposed in the second cavity, and the electronic control board assembly is disposed in the third cavity. The first cavity and the second cavity communicate with each other, while the second cavity and the third cavity do not communicate with each other. The electronic oil pump also includes an isolator, at least a portion of which is disposed between the stator assembly and the electronic control board assembly. The second cavity is located on one side of the main body of the isolator. The third cavity is located on the other side of the main body of the isolation component; the electronic oil pump also includes a first heat-conducting component, which includes a first part and a second part, the first part being located in the second cavity and the second part being located in the third cavity; the electronic oil pump also includes a temperature-sensing unit and a second heat-conducting component, which are located in the third cavity, the temperature-sensing unit being electrically connected to the electronic control board assembly, the temperature-sensing unit being located on one side of the second part, and at least a portion of the second heat-conducting component being located between the temperature-sensing unit and the second part, the temperature-sensing unit being capable of detecting the temperature of the second heat-conducting component.

[0006] By integrating the temperature sensing unit with the electronic oil pump in the above manner, the temperature sensing unit does not need to be mechanically or electrically connected to the external system. This helps to reduce the mechanical and wiring connections of the system, thereby simplifying the system structure and making it more compact. Attached Figure Description

[0007] Figure 1This is a cross-sectional structural schematic diagram of the first embodiment of the electronic oil pump in this application;

[0008] Figure 2 yes Figure 1 A front view schematic diagram of a portion of the structure of an electronic oil pump without the pump cover installed;

[0009] Figure 3 yes Figure 1 A three-dimensional structural diagram of the middle insulating component and the first heat-conducting component assembled together;

[0010] Figure 4 yes Figure 1 or Figure 3 A three-dimensional structural diagram of the first heat-conducting component in the middle;

[0011] Figure 5 yes Figure 3 A front view schematic diagram of the assembly of the middle insulating component and the first heat-conducting component;

[0012] Figure 6 yes Figure 5 A schematic diagram of a cross-sectional structure along the AA direction;

[0013] Figure 7 yes Figure 1 A three-dimensional structural diagram of the central control board assembly and the first heat-conducting component assembled together;

[0014] Figure 8 This is a front view structural diagram of the electronic control board assembly and the first heat-conducting component assembled together;

[0015] Figure 9 yes Figure 8 A schematic diagram of a cross-sectional structure along the AA direction;

[0016] Figure 10 yes Figure 9 An enlarged structural diagram of section A in the middle;

[0017] Figure 11 yes Figure 9 or Figure 10 A schematic diagram of the temperature sensing unit and the second heat-conducting component projected orthogonally in a direction parallel to the surface of the second heat-conducting component;

[0018] Figure 12 This is a cross-sectional structural schematic diagram of a second embodiment of the electronic oil pump in this application;

[0019] Figure 13 yes Figure 12 A three-dimensional structural diagram of the middle insulating component and the first heat-conducting component assembled together;

[0020] Figure 14This is a cross-sectional structural schematic diagram of the third embodiment of the electronic oil pump in this application;

[0021] Figure 15 yes Figure 14 A three-dimensional structural diagram of the middle insulating component and the first heat-conducting component assembled together;

[0022] Figure 16 yes Figure 15 A magnified structural diagram of section A in the middle. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] The electronic oil pump in the following embodiments is mainly capable of providing the flow power for the working medium of the vehicle's lubrication system and / or cooling system, specifically providing the flow power for the working medium of the lubrication system and / or cooling system in the vehicle's transmission system.

[0025] See Figure 1 The electronic oil pump 100 includes a pump housing, a first rotor assembly 2, a stator assembly 4, a second rotor assembly 3, an isolator 5, and an electronic control board assembly 6. The pump housing forms a pump cavity. The first rotor assembly 2, stator assembly 4, second rotor assembly 3, and electronic control board assembly 6 are placed in the pump cavity. In this embodiment, the pump cavity includes a first cavity 70, a second cavity 80, and a third cavity 90. The first rotor assembly 2 is disposed in the first cavity 70, the stator assembly 4 and the second rotor assembly 3 are disposed in the second cavity 80, and the electronic control board assembly 6 is disposed in the third cavity 90. The first cavity 70 and the second cavity 80 are connected, while the second cavity 80 and the third cavity 90 are not connected. At least a portion of the isolator 5 is disposed between the stator assembly 4 and the electronic control board assembly 6. The second cavity 80 is located on one side of the main body 51 of the isolator 5, and the third cavity 90 is located on the other side of the main body 51 of the isolator 5. The stator assembly 4 includes a stator core 41, an insulating frame 42, and an insulating core 41. The winding 43 and the insulating frame 42 at least cover at least a portion of the surface of the stator core 41. The winding 43 is wound around the insulating frame 42. When the electronic oil pump 100 is working, the electronic control board assembly 6 controls the current in the winding 43 of the stator assembly 4 to change according to a predetermined pattern, thereby controlling the stator assembly 4 to generate a changing excitation magnetic field. The second rotor assembly 3 rotates under the action of the excitation magnetic field. The second rotor assembly 3 can directly or indirectly drive the first rotor assembly 2 to rotate. When the first rotor assembly 2 rotates, the volume of the hydraulic cavity between the first rotor assemblies 2 changes, so that the working medium is pressed out to the outlet to generate the flow power. In this embodiment, at least a portion of the working medium in the first cavity 70 can flow into the second cavity 80. Since the stator assembly 4 is located in the second cavity 80, the working medium located in the second cavity 80 can cool the stator assembly 4, thereby facilitating the heat dissipation of the stator assembly 4.

[0026] See Figure 1 In this embodiment, the pump housing includes a pump cover 1, a first housing 7, and a second housing 8. The pump cover 1 is fixedly connected to the first housing 7, and the first housing 7 is fixedly connected to the second housing 8. Specifically, in this embodiment, the pump cover 1 and the first housing 7 are connected by screws or bolts. This arrangement makes the disassembly and assembly of the electronic oil pump more convenient, which is beneficial for the maintenance of the first rotor assembly 2 of the electronic oil pump. Of course, the pump cover 1 and the first housing 7 can also be connected in other ways, such as plug-in or snap-fit. The first housing 7 and the second housing 8 are fixedly connected. Specifically, the first housing 7 and the second housing 8 are connected by screws or bolts. This arrangement makes the disassembly and assembly of the electronic oil pump more convenient. In this embodiment, since the electronic control board assembly 6 is located in the cavity between the first housing 7 and the second housing 8, this is also beneficial for the maintenance of the electronic control board assembly in the electronic oil pump. On the other hand, it also makes the connection between the first housing 7 and the second housing 8 more reliable. Of course, the first housing 7 and the second housing 8 can also be connected by plug-in, snap-fit, or other connection methods.

[0027] See Figure 2 The first rotor assembly 2 includes a first rotor 21 and a second rotor 22. The first rotor 21 includes multiple internal teeth, and the second rotor 22 includes multiple external teeth. A hydraulic cavity 801 is formed between the internal teeth of the first rotor 21 and the external teeth of the second rotor 22. In this embodiment, the hydraulic cavity 801 is also part of the first cavity 70. In this embodiment, the first rotor 21 is sleeved on the outer periphery of the second rotor 22. See also Figure 1The electronic oil pump also includes an inlet 11 and an outlet (not shown). The working medium can enter the hydraulic chamber 801 through the inlet 11 and leave the hydraulic chamber 801 through the outlet (not shown). Due to the certain eccentricity between the first rotor 21 and the second rotor 22, when the second rotor 22 rotates, some of the external teeth of the second rotor 22 mesh with some of the internal teeth of the first rotor 21, thereby driving the first rotor 21 to rotate. During the rotation of the first rotor 21 and the second rotor 22, the volume of the hydraulic chamber 801 changes. Specifically, when the first rotor assembly 2 rotates from the starting point to a certain angle, the volume of the hydraulic chamber 801 gradually increases, thereby forming a partial vacuum, and the working medium is drawn out from the inlet 11. As the first rotor 21 and the second rotor 22 continue to rotate, the volume of the hydraulic chamber 801, which was originally filled with working medium, gradually decreases. The working medium is compressed, thereby causing the working medium entering the hydraulic chamber 801 to be forced out to the outlet (not shown), thus generating the power of flow. In this embodiment, the electronic oil pump 100 also includes a pump shaft 15, which can drive part of the first rotor assembly 2 to rotate. Specifically, in this embodiment, the pump shaft 15 can drive the second rotor 22 to rotate. In this embodiment, the pump shaft 15 is connected to the second rotor 22 and to the second rotor assembly 3. The second rotor assembly 3 drives the second rotor 22 to rotate through the pump shaft 15, thereby realizing the rotation of the first rotor assembly 2.

[0028] See Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the electronic oil pump in this application; the structure of the first embodiment of the electronic oil pump will be described in detail below.

[0029] See Figures 1 to 6 The electronic oil pump 100 also includes a first heat-conducting element 9, which includes a first part 91, a second part 92, and a connecting part 93. The first part 91 is located on one side of the main body 51 of the isolation member 5, and the second part 92 is located on the other side of the main body 51 of the isolation member 5. The first part 91 is located in the second cavity 80, and the second part 92 is located in the third cavity 90. The connecting part 93 is located between the first part 91 and the second part 92, and the connecting part 93 connects the first part 91 and the second part 92. The connecting part 93 is fixedly connected to the isolation member 5 by injection molding. In this embodiment, the connection between the connecting part 93 and the isolation member 5 is sealed. Specifically, see [link to documentation]. Figure 3The isolation member 5 includes a first protrusion 52, which protrudes from the upper surface of the main body 51 of the isolation member 5, and a first heat-conducting member 9 passes through the first protrusion 52. The first protrusion 52 includes a groove 521, which is recessed from the upper surface of the first protrusion 52. The groove 521 does not penetrate the lower surface of the main body 51 of the isolation member 5, and the first heat-conducting member 9 passes through the groove 521. The outer periphery of the first heat-conducting member 9 located in the groove 521 and the inner wall of the groove 521 are filled with sealant. This helps to prevent the working medium in the second cavity from leaking into the third cavity through the connection between the connecting part 93 and the isolation member 5, thereby helping to prevent the performance of the electronic control board assembly located in the third cavity 90 from being affected.

[0030] See Figure 1 The first part 91 of the first heat-conducting element 9 is located in the second cavity 80, so that the first part 91 can contact the working medium of the second cavity 80. See [reference needed] Figure 1 , Figure 7 and Figure 10 The electronic oil pump 100 also includes a temperature sensing unit 13 and a second heat-conducting element 16. The temperature sensing unit 13 and the second heat-conducting element 16 are located in the third cavity 90. The temperature sensing unit 13 is electrically connected to the electronic control board assembly 6. Along the axial direction perpendicular to the electronic oil pump 100, the temperature sensing unit 13 is located on one side of the second part 92 of the first heat-conducting element 9, and at least part of the second heat-conducting element 16 is located between the temperature sensing unit 13 and the second part 92. The temperature sensing unit 13 can detect the temperature of the second heat-conducting element 16. In this way, on the one hand, since the first part 91 of the first heat-conducting element 9 is located in the second cavity 80, the heat of the working medium in the second cavity 80 will be transferred to the first heat-conducting element 9. On the other hand, because the first part 91 of the first heat-conducting element 9 is located in the second cavity 80, the heat of the working medium in the second cavity 80 will be transferred to the first heat-conducting element 9. A small portion of the second heat-conducting element 16 is located between the temperature-sensing unit 13 and the second part 92. In this way, the heat from the second part 92 of the first heat-conducting element 9 is transferred to the second heat-conducting element 16. The temperature-sensing unit 13 can indirectly know the temperature of the working medium in the second cavity 80 or the parameters related to the temperature of the working medium in the second cavity 80 by detecting the temperature of the second heat-conducting element 16. On the other hand, by integrating the temperature-sensing unit 13 with the electronic oil pump in the above manner, the temperature-sensing unit 13 does not need to be mechanically or electrically connected to the external system. This helps to reduce the mechanical and wiring connections of the system, thereby simplifying the system structure and making the system structure more compact.

[0031] See Figures 7 to 11 In this embodiment, the temperature sensing unit 13 is connected to the electronic control board assembly 6. The electronic control board assembly 6 includes a substrate 61, which includes a first surface 615 and a second surface 616. The first surface 615 is closer to the main body 51 of the insulating member 5 than the second surface 616. Specifically, the temperature sensing unit 13 is disposed closer to the first surface 615 than the second surface 616. See [link to documentation]. Figure 11The temperature sensing unit 13 includes a detection unit 131 and an electrical connection unit 132. One end of the electrical connection unit 132 is electrically connected to the detection unit 131, and the other end of the electrical connection unit 132 is electrically connected to the circuit of the electronic control board assembly 6. In this embodiment, the detection unit 131 is in direct contact with the second heat-conducting element 16, and the second part 92 of the first heat-conducting element 9 is in direct contact with the second heat-conducting element 16. Of course, the second part 92 of the first heat-conducting element 9 and the second heat-conducting element 16 can also be indirectly contacted through an adapter, and the detection unit 131 and the second heat-conducting element 16 can also be indirectly contacted through an adapter. Through the above method, since the second part 92 of the first heat-conducting element 9... The detection unit 131 contacts the second heat-conducting element 16. Compared with heat transfer through air, this contact method helps to reduce temperature loss, thereby improving the accuracy of temperature detection by the temperature sensing unit 13. Of course, for applications where the accuracy of temperature detection is not critical, a preset distance can be set between the second part 92 of the first heat-conducting element 9 and the second heat-conducting element 16 along the axial direction perpendicular to the electronic oil pump. Similarly, a preset distance can also be set between the detection unit 131 and the second heat-conducting element 16. In addition, in this embodiment, the temperature sensing unit 13 can be a thermistor, a temperature sensor, or other temperature detection element.

[0032] See Figures 7 to 11 In this embodiment, the second heat-conducting element 16 is connected to the substrate 61. Along the axial direction parallel to the electronic oil pump, a portion of the second heat-conducting element 16 is located between the substrate 61 and the detection part 131 of the temperature sensing unit 13. The second heat-conducting element 16 located between the substrate 61 and the detection part 131 of the temperature sensing unit 13 can support the temperature sensing unit 13. Specifically, in this embodiment, the second heat-conducting element 16 is connected to the first surface 615 of the substrate 61. Of course, the second heat-conducting element 16 can also be connected to the second surface 616 of the substrate 61. In this case, the temperature sensing unit 13 is located closer to the second surface 616 than the first surface 615. In addition, in this embodiment, the material of the second heat-conducting element 16 can be a metal body or a metal coating or a thermally conductive silicone or thermally conductive grease, or other materials with good thermal conductivity.

[0033] See Figure 11 In this embodiment, the temperature sensing unit 13 and the second heat-conducting element 16 are projected orthogonally in a direction parallel to the upper surface of the second heat-conducting element 16. The projection of part of the detection part 131 is located within the projection of the second heat-conducting element 16. That is, the area where the second heat-conducting element 16 is located covers part of the area where the detection part 131 is located. This is beneficial to relatively increase the temperature sensing area of ​​the detection part 131, thereby further improving the sensitivity of the temperature sensing unit 13 in detecting temperature. Of course, it is also possible that the entire projection of the detection part 131 is located within the projection of the second heat-conducting element 16. That is, the area where the second heat-conducting element 16 is located completely covers the area where the detection part 131 is located. In this case, the electrical connection part 132 can be provided at both ends of the detection part 131.

[0034] See Figure 9 The electronic control board assembly 6 also includes a heat-generating electronic component 62, which is fixedly connected to the substrate 61. The connection surface of the heat-generating electronic component 62 on the substrate 61 is opposite to the connection surface of the temperature sensing unit 13 on the substrate 61. Specifically, in this embodiment, the heat-generating electronic component 62 is fixedly connected to the second surface 616 of the substrate 61. Of course, when the temperature sensing unit 13 is connected to the second surface 616 of the substrate 61, the heat-generating electronic component 62 should be fixedly connected to the first surface 615 of the substrate 61. This helps to reduce the impact of the heat generated by the heat-generating electronic component 62 on the temperature sensing unit 13, thereby reducing interference to the temperature sensing unit. The "heat-generating electronic component 62" mentioned above mainly includes common heat-generating electronic components such as diodes, MOSFETs, inductors, resistors, and capacitors.

[0035] See Figure 1 In this embodiment, one end of the first part 91 of the first heat-conducting element 9 is connected to the insulating frame 42 of the stator assembly 4, and the first part 91 of the first heat-conducting element 9 is not electrically connected to the winding 43 of the stator assembly 4. In this embodiment, the material of the first heat-conducting element 9 is a conductive metal material, and one end of the second part 92 of the first heat-conducting element 9 is electrically connected to the electronic control board assembly 6. Specifically, in this embodiment, one end of the second part 92 of the first heat-conducting element 9 is electrically connected to the reference ground plane of the electronic control board assembly 6; see also Figure 1 The electronic oil pump 100 also includes a conductive element 10, which is located in the second cavity 80. The conductive element 10 is fixedly connected to the second part 92 of the first heat-conducting element 9. Of course, the conductive element 10 and the first heat-conducting element 9 can also be an integral structure; see also Figure 1At least a portion of the conductive element 10 is located within the inner cavity of the first housing 7, which is made of metal. The stator assembly 4 is located within the inner cavity of the first housing 7. A portion of the conductive element 10 contacts the first heat-conducting element 9, and another portion of the conductive element 10 contacts the first housing 7. This arrangement indirectly connects the first housing 7 to the reference ground plane of the electronic control board assembly 6. On the one hand, the first housing 7 can radiate the electromagnetic waves it absorbs towards the reference ground plane of the electronic control board assembly 6. When the reference ground plane of the electronic control board assembly 6 is grounded externally, the electromagnetic waves absorbed by the reference ground plane of the electronic control board assembly 6 are then radiated towards the external grounding point. This helps reduce the amount of electromagnetic waves absorbed and accumulated by the first housing 7, thereby reducing the impact of the electromagnetic waves absorbed and accumulated by the first housing 7 on the performance of external systems or the electronic oil pump. On the other hand, when the surface of the first housing 7 has static electricity, it can dissipate the static electricity of the first heat-conducting element 9. Static electricity on the surface of the first housing 7 is conducted to the reference ground plane of the electronic control board assembly 6. When the reference ground plane of the electronic control board assembly 6 is grounded externally, the static electricity on the reference ground plane of the electronic control board assembly 6 is then conducted to the external grounding point. This helps to reduce the static electricity accumulated on the surface of the first housing 7, and thus helps to reduce the impact of the static electricity accumulated on the surface of the first housing 7 on the performance of the external system and / or the electronic control board assembly 6. In addition, in this embodiment, the stator core 41 is in contact with the first housing 7, the second housing 8 is in contact with the first housing 7, and the pump cover 1 is in contact with the first housing 7. This makes the stator core 41 and the second housing 8 electrically connected to the reference ground plane of the electronic control board assembly. Thus, the static electricity or electromagnetic waves absorbed by the surface of the stator core 41, the second housing 8, and the pump cover 1 can be conducted to the reference ground plane of the electronic control board assembly 6, and the static electricity or electromagnetic waves conducted to the reference ground plane of the electronic control board assembly 6 are then conducted to the external grounding point. See also Figure 1 In this embodiment, one end of the conductive element 10 contacts the first housing 7. Of course, at this time, one end of the conductive element 10 can also contact the stator core 41 or the second housing 8.

[0036] See Figure 1In this embodiment, the first heat-conducting element 9 is not electrically connected to the winding 43 of the stator assembly 4. This prevents the current flowing through the winding from passing through the first heat-conducting element 9, thus reducing its own heat generation. Since the first heat-conducting element 9 needs to transfer heat to the second heat-conducting element 16, this design helps prevent the heat generated by the first heat-conducting element 9 from being transferred to the second heat-conducting element 16, thereby reducing interference to the temperature sensing unit. Alternatively, the first part 91 of the first heat-conducting element 9 can be electrically connected to the winding. In this case, the first heat-conducting element 9 can serve as the energizing pin of the winding, meaning that current will flow through the first heat-conducting element 9. Since the first part 91 of the first heat-conducting element 9 is located in the second cavity 80, the working medium within the second cavity 80 provides some cooling to the first heat-conducting element. Therefore, when the current flowing through the winding passes through the first heat-conducting element 9, it will not cause significant deviation in the detection result of the temperature sensing unit. Thus, in this embodiment, the first heat-conducting element 9 can be used for both heat conduction and grounding connection, resulting in a simple structure, reducing the number of parts, and thus saving costs.

[0037] See Figure 12 The figure shows a schematic diagram of the second embodiment of the electronic oil pump in this application; the second embodiment of the electronic oil pump in this application will be described in detail below.

[0038] See Figure 12 and Figure 13 In this embodiment, one end of the first part 91 of the first heat-conducting element 9 is a free end, and one end of the first part 91 is not in contact with the stator assembly 4. One end of the second part 92 is not electrically connected to the electronic control board assembly 6. In this embodiment, the electronic oil pump 100 also includes four connection terminals. The connection terminals penetrate the upper and lower surfaces of the main body 51 of the isolation element 5 and are fixedly connected to the main body 51 of the isolation element 5. Specifically, the four connection terminals are defined as the first connection terminal 141, the second connection terminal 142, the third connection terminal 143, and the fourth connection terminal 144, wherein the first connection terminal 141, the second connection terminal 142, the third connection terminal 143, and the fourth connection terminal 144 are respectively defined as the first connection terminal 141, the second connection terminal 142, the third connection terminal 143, and the fourth connection terminal 144. Terminal 142 and the third connection terminal 143 serve as the energizing pins of the winding 43. Specifically, one end of the first connection terminal 141, the second connection terminal 142, and the third connection terminal 143 is electrically connected to the winding 43 of the stator assembly 4, and the other end of the first connection terminal 141, the second connection terminal 142, and the third connection terminal 143 is electrically connected to the electronic control board assembly 6. The fourth connection terminal 144 is electrically connected to the reference ground layer of the electronic control board assembly 6 and the first housing 7. In addition, in this embodiment, the material of the second heat-conducting element 16 can be a metal body or a metal coating or a thermally conductive silicone or thermally conductive grease, or other materials with good thermal conductivity.

[0039] Compared with the first embodiment of the electronic oil pump, in this embodiment, the electronic oil pump 100a further includes a connection terminal. One end of the first part 91 of the first heat-conducting element 9 is a free end, and one end of the first part 91 is not in contact with the stator assembly 4. One end of the second part 92 is not electrically connected to the electronic control board assembly 6. Thus, the first heat-conducting element only has the function of heat conduction and does not have the function of electrical connection. Other features in this embodiment can be referred to in the first embodiment of the electronic oil pump, and will not be described in detail here. In addition, in this embodiment, the temperature sensing unit 13 is disposed closer to the first surface than the second surface of the substrate. The specific structure can be referred to in the temperature sensing unit in the first embodiment of the electronic oil pump. Of course, the temperature sensing unit 13 can also be disposed close to the lower surface of the substrate, and will not be described in detail here.

[0040] See Figure 14 , Figure 14 This is a schematic diagram of the third embodiment of the electronic oil pump in this application; the third embodiment of the electronic oil pump in this application will be described in detail below.

[0041] See Figures 14 to 16 In this embodiment, the temperature sensing unit 13 is fixedly connected to the main body 51 of the isolation member 5, and the second heat-conducting member 16 is fixedly connected to the main body 51 of the isolation member 5. The temperature sensing unit 13 and the second heat-conducting member 16 are located between the main body 51 of the isolation member 5 and the substrate 61 of the electronic control board assembly 6. Along the axial direction perpendicular to the electronic oil pump, the temperature sensing unit 13 is located on one side of the second part 92 of the first heat-conducting member 9, and at least a portion of the second heat-conducting member 16 is located between the temperature sensing unit 13 and the second part 92. See also... Figure 14 Along the axial direction parallel to the electronic oil pump, a portion of the second heat-conducting element 16 is located between the main body 51 of the isolator 5 and the detection part 131 of the temperature sensing unit 13. The second heat-conducting element 16 located between the main body 51 of the isolator 5 and the detection part 131 of the temperature sensing unit 13 can support the detection part 131 of the temperature sensing unit 13 and is in contact with it. The second part 92 of the first heat-conducting element 9 is in contact with the second heat-conducting element 16, and the detection part 132 of the temperature sensing unit 13 is electrically connected to the electronic control board assembly 6. Through this method, since the second part 92 of the first heat-conducting element 9 is in contact with the second heat-conducting element 16, and the detection part 131 of the temperature sensing unit 13 is in contact with the second heat-conducting element 16, this contact method, compared to air heat transfer, helps to reduce temperature loss and thus improves the accuracy of the temperature sensing unit 13. Furthermore, in this embodiment, the material of the second heat-conducting element 16 can be a metal body or metal layer, thermally conductive silicone, thermally conductive grease, or other materials with good thermal conductivity.

[0042] Compared with the first embodiment of the electronic oil pump, in this embodiment, the temperature sensing unit 13 and the second heat-conducting element 16 are fixedly connected to the main body 51 of the isolation element 5; other features in this embodiment can be referred to the first embodiment of the electronic oil pump, and will not be described in detail here; of course, the first heat-conducting element in this embodiment can also refer to the structure of the first heat-conducting element in the second embodiment of the electronic oil pump, and will not be described in detail here.

[0043] It should be noted that the above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of the claims of this application.

Claims

1. An electronic oil pump, comprising a pump housing, a first rotor assembly, a stator assembly, and an electronic control board assembly, the electronic oil pump having a first chamber, a second chamber, and a third chamber, the first rotor assembly being located in the first chamber, the stator assembly being disposed in the second chamber, and the electronic control board assembly being disposed in the third chamber, the first chamber communicating with the second chamber, and the second chamber not communicating with the third chamber; the electronic oil pump further comprising an isolator, at least a portion of the isolator being disposed between the stator assembly and the electronic control board assembly, the second chamber being located on one side of the main body of the isolator, and the third chamber being located within the main body of the isolator. On the other side of the part; the electronic oil pump also includes a first heat-conducting element, the first heat-conducting element including a first part and a second part, the first part being located in the second cavity and the second part being located in the third cavity; the electronic oil pump also includes a temperature-sensing unit and a second heat-conducting element, the temperature-sensing unit and the second heat-conducting element being located in the third cavity, the temperature-sensing unit being electrically connected to the electronic control board assembly, along a direction perpendicular to the axial direction of the electronic oil pump, the temperature-sensing unit being located on one side of the second part, at least a portion of the second heat-conducting element being located between the temperature-sensing unit and the second part, the temperature-sensing unit being capable of detecting the temperature of the second heat-conducting element.

2. The electronic oil pump according to claim 1, characterized in that: The temperature sensing unit includes a detection part and an electrical connection part. One end of the electrical connection part is electrically connected to the detection part, and the other end of the electrical connection part is electrically connected to the electronic control board assembly. When the temperature sensing unit and the second heat-conducting element are projected orthogonally in a direction parallel to the lower end surface of the main body of the isolation element, at least a portion of the projection of the detection part coincides with the projection of the second heat-conducting element.

3. The electronic oil pump according to claim 1, characterized in that: The electronic control board assembly includes a substrate, and the second heat-conducting element is connected to the substrate. Along an axial direction parallel to the electronic oil pump, a portion of the second heat-conducting element is located between the substrate and the detection part of the temperature sensing unit, and the second heat-conducting element located between the substrate and the detection part of the temperature sensing unit can support a portion of the temperature sensing unit.

4. The electronic oil pump according to claim 2, characterized in that: The electronic control board assembly includes a substrate, and the second heat-conducting element is connected to the substrate. Along an axial direction parallel to the electronic oil pump, a portion of the second heat-conducting element is located between the substrate and the detection part of the temperature sensing unit, and the second heat-conducting element located between the substrate and the detection part of the temperature sensing unit can support a portion of the temperature sensing unit.

5. The electronic oil pump according to claim 3, characterized in that: The second heat-conducting component is in contact with the second part, and the detection part of the temperature sensing unit is in contact with the second heat-conducting component; the electronic control board assembly also includes a heating electronic component, the heating electronic component is connected to the substrate, and the connection surface of the heating electronic component on the substrate and the connection surface of the second heat-conducting component on the substrate are opposite surfaces.

6. The electronic oil pump according to claim 4, characterized in that: The second heat-conducting component is in contact with the second part, and the detection part of the temperature sensing unit is in contact with the second heat-conducting component; the electronic control board assembly also includes a heating electronic component, the heating electronic component is connected to the substrate, and the connection surface of the heating electronic component on the substrate and the connection surface of the second heat-conducting component on the substrate are opposite surfaces.

7. The electronic oil pump according to claim 1, characterized in that: The temperature sensing unit is connected to the main body of the isolation member, and the second heat-conducting member is connected to the main body of the isolation member. The temperature sensing unit and the second heat-conducting member are located between the main body of the isolation member and the substrate of the electronic control board assembly.

8. The electronic oil pump according to claim 2, characterized in that: The temperature sensing unit is connected to the main body of the isolation member, and the second heat-conducting member is connected to the main body of the isolation member. The temperature sensing unit and the second heat-conducting member are located between the main body of the isolation member and the substrate of the electronic control board assembly.

9. The electronic oil pump according to claim 7, characterized in that: The first heat-conducting element is in contact with the second heat-conducting element; along the axial direction parallel to the electronic oil pump, a portion of the second heat-conducting element is located between the main body of the isolator and the detection part of the temperature sensing unit, and the second heat-conducting element located between the main body of the isolator and the detection part of the temperature sensing unit can support the temperature sensing unit and contact the detection part of the temperature sensing unit.

10. The electronic oil pump according to claim 8, characterized in that: The first heat-conducting element is in contact with the second heat-conducting element; along the axial direction parallel to the electronic oil pump, a portion of the second heat-conducting element is located between the main body of the isolator and the detection part of the temperature sensing unit, and the second heat-conducting element located between the main body of the isolator and the detection part of the temperature sensing unit can support the temperature sensing unit and contact the detection part of the temperature sensing unit.

11. The electronic oil pump according to any one of claims 1 to 10, characterized in that: One end of the first part is a free end and does not contact the stator assembly. One end of the second part is not electrically connected to the electronic control board assembly.

12. The electronic oil pump according to any one of claims 1 to 10, characterized in that: One end of the first part is connected to the stator assembly, and one end of the second part is electrically connected to the electronic control board assembly.

13. The electronic oil pump according to claim 12, characterized in that: The stator assembly includes a stator core, windings, and an insulating frame. At least a portion of the insulating frame covers the surface of the stator core. The windings are wound around the insulating frame. One end of the first portion is connected to the insulating frame. The first portion is electrically connected to the windings. The first heat-conducting element can serve as the energizing pin of the windings.

14. The electronic oil pump according to claim 13, characterized in that: The first heat-conducting element is electrically connected to the reference ground plane of the electronic control board assembly; the stator assembly includes a stator core, windings and an insulating frame, at least a portion of the insulating frame covers the surface of the stator core, the windings are wound around the insulating frame, one end of the first portion is connected to the insulating frame, and the first portion and the windings are not electrically connected.

15. The electronic oil pump according to claim 14, characterized in that: The first heat-conducting component is made of a conductive metal material; the electronic oil pump also includes a conductive component located in the second cavity and in contact with the second part; the pump housing includes a first housing, at least a portion of which is located in the inner cavity of the first housing, the first housing is made of a metal material, and the conductive component is in contact with the first housing or the stator core.

16. The electronic oil pump according to any one of claims 1 to 10, characterized in that: The material of the second thermal conductive element includes metal, thermally conductive silicone, or thermally conductive grease; along the axial direction of the electronic oil pump, the first thermal conductive element passes through the main body of the isolator, the first thermal conductive element includes a connecting portion, the connecting portion is located between the first portion and the second portion, the connecting portion is fixedly connected to the isolator, and the connection between the connecting portion and the isolator is sealed.

17. The electronic oil pump according to claim 11, characterized in that: The material of the second thermal conductive element includes metal, thermally conductive silicone, or thermally conductive grease; along the axial direction of the electronic oil pump, the first thermal conductive element passes through the main body of the isolator, the first thermal conductive element includes a connecting portion, the connecting portion is located between the first portion and the second portion, the connecting portion is fixedly connected to the isolator, and the connection between the connecting portion and the isolator is sealed.

18. The electronic oil pump according to claim 12, characterized in that: The material of the second thermal conductive element includes metal, thermally conductive silicone, or thermally conductive grease; along the axial direction of the electronic oil pump, the first thermal conductive element passes through the main body of the isolator, the first thermal conductive element includes a connecting portion, the connecting portion is located between the first portion and the second portion, the connecting portion is fixedly connected to the isolator, and the connection between the connecting portion and the isolator is sealed.

19. The electronic oil pump according to claim 13, characterized in that: The material of the second thermal conductive element includes metal, thermally conductive silicone, or thermally conductive grease; along the axial direction of the electronic oil pump, the first thermal conductive element passes through the main body of the isolator, the first thermal conductive element includes a connecting portion, the connecting portion is located between the first portion and the second portion, the connecting portion is fixedly connected to the isolator, and the connection between the connecting portion and the isolator is sealed.

20. The electronic oil pump according to claim 14, characterized in that: The material of the second thermal conductive element includes metal, thermally conductive silicone, or thermally conductive grease; along the axial direction of the electronic oil pump, the first thermal conductive element passes through the main body of the isolator, the first thermal conductive element includes a connecting portion, the connecting portion is located between the first portion and the second portion, the connecting portion is fixedly connected to the isolator, and the connection between the connecting portion and the isolator is sealed.

21. The electronic oil pump according to claim 15, characterized in that: The material of the second thermal conductive element includes metal, thermally conductive silicone, or thermally conductive grease; along the axial direction of the electronic oil pump, the first thermal conductive element passes through the main body of the isolator, the first thermal conductive element includes a connecting portion, the connecting portion is located between the first portion and the second portion, the connecting portion is fixedly connected to the isolator, and the connection between the connecting portion and the isolator is sealed.

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