Electronic oil pump

Abstract

An electronic oil pump comprises a first rotor assembly, a stator assembly, an electronic control board assembly, an isolating member and a heat conductor, wherein the first rotor assembly is located in the first cavity of the electronic oil pump; the heat conductor comprises a first part and a second part, the first part is located in the second cavity of the electronic oil pump, and the second part is located in the third cavity of the electronic oil pump; the electronic control board assembly comprises a substrate and a temperature sensing unit, the substrate comprises a first hole, an upper plate layer, a lower plate layer and at least one metal layer, and part of the second part is located in the first hole; the temperature sensing unit is located on one side of the second part, and there is a preset distance between the temperature sensing unit and the second part; the metal layer closest to the temperature sensing unit is defined as the nearest metal layer, and the temperature sensing unit is projected in a direction parallel to the upper surface of the nearest metal layer, and at least part of the projection of the temperature sensing unit is located in the nearest metal layer, and the temperature sensing unit can detect the temperature of the nearest metal layer or the temperature sensing unit can detect the temperature of the upper plate layer or the lower plate layer in contact with the nearest metal layer; this is conducive to simplifying the system structure.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to components of a vehicle lubrication system and / or cooling system. Background Art

[0002] The electronic oil pump mainly provides power for the vehicle's lubrication system and / or cooling system; the operating status of the electronic oil pump is related to the temperature of the oil. In order to detect the temperature of the oil in the electronic oil pump, the system will set a temperature sensor on the inlet pipeline of the electronic oil pump to detect the temperature of the oil. The temperature sensor is connected to the control unit of the system 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, which is conducive to simplifying the system structure.

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

[0005] 14. The oil pump of claim 13, wherein the first and second cams are connected to each other via a channel configured to connect the first and second cams to the oil pump, respectively. The oil pump comprises a pump housing, a first rotor assembly, a stator assembly, and an electronic control board assembly, wherein the pump housing is capable of forming an inner pump cavity, wherein the inner pump cavity comprises a first cavity, a second cavity, and a third cavity, wherein the first rotor assembly is located in the first cavity, the stator assembly is arranged in the second cavity, and the electronic control board assembly is arranged in the third cavity, the first cavity is connected to the second cavity, and the second cavity is not connected to the third cavity; the electronic oil pump further comprises an isolating member, at least part of which is arranged between the stator assembly and the electronic control board assembly, the second cavity is located on one side of the isolating member main body, and the third cavity is located on the other side of the isolating member main body; the electronic oil pump further comprises a heat conducting member, wherein the heat conducting 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 electronic control board assembly comprises a substrate, and the substrate comprises a first hole, an upper plate, and a layer, a lower plate layer and at least one metal layer, the metal layer is located between the upper plate layer and the lower plate layer, the upper plate layer is closer to the main body of the isolation member than the lower plate layer, the first hole extends from the upper surface of the upper plate layer toward the lower plate layer, and part of the second part is located in the first hole; the electric control board assembly also includes a temperature sensing unit, the temperature sensing unit is fixedly connected to the substrate, and a preset distance is provided between the temperature sensing unit and the second part; the metal layer closest to the temperature sensing unit is defined as the nearest metal layer, the temperature sensing unit is projected in a direction parallel to the upper surface of the nearest metal layer, and at least part of the projection of the temperature sensing unit is located in the nearest metal layer, the temperature sensing unit can detect the temperature of the nearest metal layer or the temperature sensing unit can detect the temperature of the upper plate layer in contact with the nearest metal layer or the lower plate layer in contact with the nearest metal layer.

[0006] In the above manner, the temperature sensing unit is integrated with the electronic oil pump, so that the temperature sensing unit does not need to be mechanically and electrically connected to the external system separately, which is conducive to relatively reducing the mechanical connections and line connections of the system, and further helps to simplify the system structure, making the system structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0009] Figure 3 yes Figure 1 A schematic diagram of a three-dimensional structure in which the middle isolating member and the heat conducting member are assembled together;

[0010] Figure 4 yes Figure 1 or Figure 3 A schematic diagram of the three-dimensional structure of the heat conducting member;

[0011] Figure 5 yes Figure 3 A schematic diagram of the front view of the structure in which the middle isolation member and the heat conducting member are assembled together;

[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 schematic diagram of a three-dimensional structure in which the central electronic control panel assembly and the heat conducting component are assembled together;

[0014] Figure 8 It is a front view structural diagram of the electric control panel assembly and the 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 A schematic diagram of an enlarged structure of the first embodiment of the middle part A;

[0017] Figure 11 yes Figure 9 An enlarged structural diagram of the second embodiment of the middle portion A;

[0018] Figure 12 yes Figure 10 or Figure 11 A schematic diagram of a projection in which the temperature sensing unit is projected in a direction parallel to the surface of the nearest metal layer;

[0019] Figure 13 1 is a schematic cross-sectional view of a second embodiment of the electronic oil pump in the present application;

[0020] Figure 14 yes Figure 1 A schematic diagram of a cross-sectional structure of the central electronic control panel assembly and the heat conducting component assembled together;

[0021] Figure 15 yes Figure 14 A schematic diagram of an enlarged structure of the first embodiment of the middle part A;

[0022] Figure 16 yes Figure 14 An enlarged structural diagram of the second embodiment of the middle portion A;

[0023] Figure 17 yes Figure 15 or Figure 16 A schematic diagram of projecting the temperature sensing unit in a direction parallel to the surface of the nearest metal layer;

[0024] Figure 18 1 is a schematic cross-sectional view of a third embodiment of the electronic oil pump in this application;

[0025] Figure 19 yes Figure 18 A schematic diagram of a three-dimensional structure in which the middle isolation member and the heat conducting member are assembled together. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] The electronic oil pump in the following embodiments can mainly provide flow power for the working medium of the vehicle lubrication system and / or cooling system, and specifically can provide flow power for the working medium of the lubrication system and / or cooling system in the vehicle transmission system.

[0028] See also Figure 1The electronic oil pump 100 includes a pump housing, a first rotor assembly 2, a stator assembly 4, a second rotor assembly 3 and an electronic control board assembly 6; the pump housing can form a pump cavity, and the first rotor assembly 2, the stator assembly 4, the second rotor assembly 3 and the 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 arranged in the first cavity 70, the stator assembly 4 and the second rotor assembly 3 are arranged in the second cavity 80, and the electronic control board assembly 6 is arranged in the third cavity 90. The first cavity 70 and the second cavity 80 are connected, and the second cavity 80 and the third cavity 90 are not connected; the stator assembly 4 includes a stator core 41, an insulating frame 42 and a winding 43. The insulating frame 42 at least covers at least a portion of the surface of the stator core 41, and the winding 43 is wound around on 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 rule, 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, and 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 assembly 2 changes, so that the working medium is pressed out to the outlet to generate flow power; in this embodiment, part of the working medium in the first cavity 70 can flow into the second cavity 80. Since the stator assembly 4 is arranged in the second cavity 80, the working medium located in the second cavity 80 can cool the stator assembly 4, which is beneficial to the heat dissipation of the stator assembly 4.

[0029] See also 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 and the first housing 7, and the first housing 7 and the second housing 8 are fixedly connected relative to each other. The pump cover 1, the first housing 7, and the second housing 8 are all made of metal. Of course, the material of the first housing can also be metal. Specifically, in this embodiment, the pump cover 1 and the first housing 7 are connected by screws or bolts. This arrangement makes the electronic oil pump more convenient to disassemble and assemble, thereby facilitating 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 by other means, such as plugging, clamping, etc. 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. On the one hand, this arrangement makes the electronic oil pump more convenient to disassemble and assemble. In this embodiment, since the electronic control board assembly 6 is disposed in the cavity between the first housing 7 and the second housing 8, this also facilitates the maintenance of the electronic control board assembly in the electronic oil pump. On the other hand, it can also make 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 plugging, clamping, or other means.

[0030] See also Figure 2The first rotor assembly 2 includes a first rotor 21 and a second rotor 22. The first rotor 21 includes a plurality of internal teeth, and the second rotor 22 includes a plurality of external teeth. A hydraulic chamber 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 chamber 801 is also part of the first chamber 70. In this embodiment, the first rotor 21 is sleeved on the outer circumference of the second rotor 22. Figure 1 The 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 the working medium can leave the hydraulic chamber 801 through the outlet (not shown). Since there is a certain eccentricity between the first rotor 21 and the second rotor 22, when the second rotor 22 rotates, part of the external teeth of the second rotor 22 engages with part of the internal teeth of the first rotor 21, thereby driving the first rotor 21 to rotate. During the process of the first rotor 21 and the second rotor 22 rotating one circle, 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 local vacuum, and the working medium flows from the inlet. The port 11 is sucked into the hydraulic chamber 801. When the first rotor 21 and the second rotor 22 continue to rotate, the volume of the hydraulic chamber 801 originally filled with the working medium gradually decreases, and the working medium is squeezed, so that the working medium entering the hydraulic chamber 801 is pressed out to the outlet (not shown) to generate flow power; in this embodiment, the electronic oil pump 100 also includes a pump shaft 15, and the pump shaft 15 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 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.

[0031] See also Figure 1 , Figure 1 This is a structural diagram of the first embodiment of the electronic oil pump in this application; the structure of the electronic oil pump in the first embodiment of this application will be introduced in detail below.

[0032] See also Figure 1 The electronic oil pump 100 further includes an isolator 5, at least part of which is disposed between the stator assembly 4 and the electronic control board assembly 6, the second cavity 80 being located on one side of the main body 51 of the isolator 5, and the third cavity 90 being located on the other side of the main body 51 of the isolator 5; see Figures 1 to 4 The electronic oil pump 100 further includes a heat conductor 9. In this embodiment, the heat conductor 9 is fixedly connected to the main body 51 of the isolating member 5. The heat conductor 9 passes through the main body 51 of the isolating member 5 along the axial direction parallel to the electronic oil pump. Specifically, in this embodiment, the heat conductor 9 is used as an insert and the isolating member 5 is injection molded. That is, the heat conductor 9 and the isolating member 5 are fixedly connected by injection molding.

[0033] See also Figures 1 to 6 The heat conducting member 9 includes a first portion 91, a second portion 92 and a connecting portion 93. The first portion 91 is located on one side of the main portion 51 of the isolating member 5, and the second portion 92 is located on the other side of the main portion 51 of the isolating member 5. The first portion 91 is located in the second cavity 80, and the second portion 92 is located in the third cavity 90. The connecting portion 93 is located between the first portion 91 and the second portion 92. The connecting portion 93 connects the first portion 91 and the second portion 92. The connecting portion 93 is fixedly connected to the isolating member 5 by injection molding. In this embodiment, the connection between the connecting portion 93 and the isolating member 5 is sealed. Specifically, see Figure 6 The isolating member 5 includes a first protrusion 52, which is protruding from the upper surface of the main body 51 of the isolating member 5, and the 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, and the groove 521 does not pass through the lower surface of the main body 51 of the isolating member 5, and the heat conducting member 9 passes through the groove 521, and the outer periphery of the heat conducting member 9 located in the groove 521 and the inner wall of the groove 521 are filled with sealant; this is conducive to preventing the working medium in the second cavity 80 from leaking to the third cavity 90 through the connection between the connecting portion 93 and the isolating member 5, thereby preventing the performance of the electric control board assembly 6 located in the third cavity 90 from being affected.

[0034] See also Figures 7 to 10 The electric control board assembly 6 includes a substrate 61, which includes a first hole 611, an upper plate layer 612, a lower plate layer 613 and at least one metal layer 614. Along a direction parallel to the thickness of the substrate 61, the metal layer 614 is located between the upper plate layer 612 and the lower plate layer 613. The upper plate layer 612 is closer to the main body 51 of the isolation member 5 than the lower plate layer 613. The first hole 611 extends from the upper surface of the upper plate layer 612 toward the lower plate layer 613, and the second portion 92 of the heat conductor 9 is located in the first hole 611; specifically, in this embodiment, the first hole 611 is set through. Of course, the first hole 611 can also be a blind hole.

[0035] See also Figures 1 to 10 The electronic control board assembly 6 further includes a temperature sensing unit 13, which is fixedly connected to the substrate 61. The temperature sensing unit 13 is located on one side of the second portion 92 of the heat conducting member 9 along the axial direction perpendicular to the electronic oil pump 100. A set distance is provided between the temperature sensing unit 13 and the second portion 92 of the heat conducting member 9. The metal layer closest to the temperature sensing unit 13 is defined as the nearest metal layer 6141. See FIG. Figure 12 , Figure 12This is a schematic diagram of a projection of the temperature sensing unit 13 in a direction parallel to the upper surface of the nearest metal layer 6141. This is only for illustration purposes and does not limit the shape and size of the nearest metal layer 6141 and the temperature sensing unit 13. Figure 12 , the temperature sensing unit 13 is projected in a direction parallel to the upper surface of the nearest metal layer 6141, and at least part of the projection of the temperature sensing unit 13 is located on the nearest metal layer 6141. The temperature sensing unit 13 can detect the temperature of the nearest metal layer 6141 or the temperature sensing unit 13 can detect the temperature of the upper plate layer 612 in contact with the nearest metal layer 6141; there are two implementations: the first implementation is: see Figure 10 and Figure 12 The temperature sensing unit 13 includes a detection portion 131 and an electrical connection portion 132. The detection portion 131 is supported on the upper plate layer 612. One end of the electrical connection portion 132 is electrically connected to the detection portion 131, and the other end of the electrical connection portion 132 is electrically connected to the circuit of the upper plate layer 612. In this embodiment, the electrical connection portion is located below the detection portion 131. The electrical connection portion 132 here can be a solder point or other structure for electrical connection; the second implementation is: see Figure 11 and Figure 12 The upper plate layer 612 has a through hole 6120, and the temperature sensing unit 13 includes a detection part 131 and an electrical connection part 132. At least part of the detection part 131 is located in the through hole 6120. The detection part 131 is supported on the nearest metal layer 6141 and contacts the nearest metal layer 6141. One end of the electrical connection part 132 is electrically connected to the detection part 131, and the other end of the electrical connection part 132 is electrically connected to the circuit of the upper plate layer 612. In this embodiment, the electrical connection part is located below the detection part 131. The electrical connection part 132 here can be a solder joint or other structure for electrical connection. In this embodiment, the temperature sensing unit 13 can be a thermistor or other temperature detection element such as a temperature sensor.

[0036] In the above manner, on the one hand, the temperature sensing unit 13 is integrated with the electronic oil pump 100, so that the temperature sensing unit 13 does not need to be mechanically and electrically connected to the external system separately, which is conducive to relatively reducing the mechanical connection and line connection of the system, and further conducive to simplifying the system structure, making the system structure more compact; on the other hand, since the first portion 91 of the heat conductor 9 is located in the second cavity 80 and contacts the working medium located in the second cavity 80, the heat of the working medium in the second cavity 80 will be transferred to the heat conductor 9, and since the second portion 92 of the heat conductor 9 is partially located in the first hole 611, the heat of the heat conductor 9 will be transferred to the heat conductor 9 at least through the second portion 92 located in the first hole 611. The closest metal layer 6141, in the first embodiment described above, the heat of the closest metal layer 6141 will be transferred to the detection part 131 of the temperature sensing unit 13 through the upper plate layer. 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 upper plate layer; in the second embodiment described above, the heat of the closest metal layer 6141 will be directly transferred to the detection part 131 of the temperature sensing unit 13. The detection part 131 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 closest metal layer 6141.

[0037] See also Figure 10 In the first embodiment, the minimum gap distance between the temperature sensing unit 13 and the second portion 92 of the heat conducting member is defined as the first distance (L1), the minimum distance between the nearest metal layer 6141 and the second portion 92 located in the first hole 611 is defined as the second distance (L2), the metal layer closest to the temperature sensing unit 13 is defined as the nearest metal layer 6141, and the minimum distance between the nearest metal layer 6141 and the temperature sensing unit 13 is defined as the third distance (L3). The first distance (L1), the second distance (L2) and the third distance (L3) satisfy the following relationship: L1>L2+L3; in this way, the first distance (L1) of the heat conducting member is defined as the minimum gap distance between the second portion 92 and the first hole 611. The minimum path for the heat of the second part 92 to be transferred to the temperature sensing unit 13 along the second distance (L1) and the third distance (L3) is smaller than the minimum path for the heat of the second part 92 of the heat conductor to be transferred to the temperature sensing unit 13 along the first distance (L1), so that the speed at which the heat of the second part 92 of the heat conductor is transferred to the temperature sensing unit 13 along the second distance (L2) and the third distance (L3) is greater than the speed at which the heat of the second part 92 of the heat conductor is transferred to the temperature sensing unit 13 along the first distance. Since heat transfer through air will result in heat loss, the above method is beneficial to improving the accuracy of temperature detection by the temperature sensing unit 13 compared with heat transfer through air.

[0038] Specifically, see Figure 10In this embodiment, at least part of the outer surface of the second portion 92 located in the first hole 611 is arranged in contact with the nearest metal layer 6141; this makes the minimum distance between the nearest metal layer 6141 and the second portion 92 located in the first hole 611, that is, the second distance (L2) is zero, so that the heat of the second portion 92 of the heat conductor 9 can be directly transferred to the nearest metal layer 6141, which is beneficial to reduce the heat loss of the second portion 92 of the heat conductor 9, and further helps to improve the accuracy of temperature detection by the temperature sensing unit.

[0039] See also Figure 9 , the electric control board assembly 6 also includes a heat-generating electronic component 62, which is fixedly connected to the substrate 61, and the connection surface corresponding to the heat-generating electronic component 62 on the substrate 61 is opposite to the connection surface corresponding to the temperature sensing unit 13 on the substrate 61; specifically, in this embodiment, the substrate 61 includes a first surface 615 and a second surface 616, the first surface 615 is closer to the main body 51 of the isolation member 5 than the second surface 616, in this embodiment, the first surface 615 is the upper surface of the upper plate layer 612, and the second surface 616 is the lower surface of the lower plate layer 613, the temperature sensing unit 13 is fixedly connected to the first surface 615, and the heat-generating electronic component 62 is fixedly connected to the second surface 616, which is conducive to reducing the influence of the heat generated by the heat-generating electronic component 62 on the temperature sensing unit 13, thereby helping to reduce interference with the detection of the temperature sensing unit; the above-mentioned "heat-generating electronic components 62" mainly include common electronic components that are prone to heat, such as diodes, MOS tubes, inductors, resistors, and capacitors.

[0040] See also Figure 1 and Figure 3 In this embodiment, one end of the first portion 91 of the heat conductor 9 is connected to the insulating frame 42 of the stator assembly 4. The first portion 91 of the heat conductor 9 is not electrically connected to the winding 43 of the stator assembly 4. In this embodiment, the heat conductor 9 is made of a conductive metal material. One end of the second portion 92 of the heat conductor 9 is electrically connected to the electric control board assembly 6. Specifically, in this embodiment, one end of the second portion 92 of the heat conductor 9 is electrically connected to the reference ground layer of the electric control board assembly 6; see Figure 1 The electronic oil pump 100 further includes a conductive member 10, which is located in the second cavity 80. The conductive member 10 is fixedly connected to and in contact with the second portion 92 of the heat-conducting member 9. In this embodiment, the conductive member 10 and the heat-conducting member 9 are processed separately and then assembled. Of course, the conductive member 10 and the heat-conducting member 9 can also be an integrated structure; see Figure 1At least part of the conductive member 10 is located in the inner cavity of the first shell 7. The material of the first shell 7 is a metal material. The first shell 7 partially surrounds the outer periphery of the stator assembly 4. The stator assembly 4 is located in the inner cavity of the first shell 7. In this way, when the winding 43 of the stator assembly 4 radiates electromagnetic waves outward or when the external system radiates electromagnetic waves to the first shell, on the one hand, the electromagnetic waves radiated by the winding 43 can be absorbed by the first shell 7 itself, which is beneficial to prevent the electromagnetic waves radiated by the winding from affecting the external system or preventing the electromagnetic waves of the external system from affecting the performance of the electronic oil pump; see Figure 1 and Figure 3 , part of the conductive member 10 is arranged in contact with the first shell 7, and another part of the conductive member 10 is in contact with the heat conductive member 9; through the above method, since one end of the second part 92 of the heat conductive member 9 is electrically connected to the reference ground layer of the electric control board assembly 6, part of the conductive member 10 is arranged in contact with the first shell 7, and another part of the conductive member 10 is in contact with the heat conductive member 9, so that the first shell 7 is indirectly electrically connected to the reference ground layer of the electric control board assembly 6, and the reference ground layer of the electric control board assembly 6 is grounded to the outside. In this way, on the one hand, the first shell 7 can radiate the electromagnetic waves absorbed by itself to the reference ground layer of the electric control board assembly 6. When the reference ground layer of the electric control board assembly 6 is grounded to the outside, the electromagnetic waves absorbed by the reference ground layer of the electric control board assembly 6 are radiated to the external grounding point, which is beneficial to reduce the amount of electromagnetic waves absorbed and accumulated by the first shell 7 itself, thereby reducing the impact of the electromagnetic waves absorbed and accumulated by the first shell 7 itself on the performance of the external system or the electronic oil pump; on the other hand, when the first When there is static electricity on the surface of the shell 7, the static electricity on the surface of the first shell 7 can be conducted to the reference ground layer of the electric control board assembly 6 through the conductive member 10. When the reference ground layer of the electric control board assembly 6 is grounded to the outside, the static electricity on the reference ground layer of the electric control board assembly 6 is further conducted to the external grounding point. This is beneficial to reducing the static electricity accumulated on the surface of the first shell 7, and further beneficial to reducing the impact of the static electricity accumulated on the surface of the first shell 7 on the performance of the external system and / or the electric control board assembly 6. In addition, in this embodiment, the stator core 41 is in contact with the first shell 7, the second shell 8 is in contact with the first shell 7, and the pump cover 1 is in contact with the first shell 7. In this way, the stator core 41 and the second shell 8 are electrically connected to the reference ground layer of the electric control board assembly. In this way, the static electricity on the surface of the stator core 41, the second shell 8 and the pump cover 1 or the electromagnetic waves absorbed by themselves can be conducted to the reference ground layer of the electric control board assembly 6. The static electricity or electromagnetic waves conducted to the reference ground layer of the electric control board assembly 6 are then conducted to the external grounding point. See Figure 1 In this embodiment, one end of the conductive member 10 contacts the first housing 7 . Of course, at this time, one end of the conductive member 10 may also contact the stator core 41 or the second housing 8 .

[0041] See also Figure 1In this embodiment, the heat conductor 9 is not electrically connected to the winding of the stator assembly 4. In this way, the current passing through the winding will not pass through the heat conductor 9, which helps to reduce the heat generated by the winding being transferred to the heat conductor 9. Since the heat conductor 9 needs to transfer heat to the nearest metal layer, this helps to prevent the heat generated by the winding from being transferred to the nearest metal layer through the heat conductor 9, thereby helping to reduce interference with the temperature sensing unit. Of course, the first portion 91 of the heat conductor 9 can also be electrically connected to the winding. In this case, the heat conductor 9 can serve as the energized pin end of the winding, that is, the heat conductor 9 will have a current passing through the winding. Since the first portion 91 of the heat conductor 9 is located in the second cavity, the working medium in the second cavity will have a certain cooling effect on the heat conductor 9. Therefore, when the current passing through the winding passes through the heat conductor 9, it will not cause a large deviation in the detection result of the temperature sensing unit. Therefore, through the above method, in this embodiment, the heat conductor 9 can be used for heat conduction on the one hand and for electrical connection on the other hand. This simple structure helps to reduce the number of parts and thus save costs.

[0042] See also Figure 13 , Figure 13 This is a structural 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 introduced in detail below.

[0043] See also Figures 13 to 16 In this embodiment, the temperature sensing unit 13 is fixedly connected to the substrate 61. Specifically, in this embodiment, the temperature sensing unit 13 is arranged closer to the lower surface of the substrate 61 than the upper surface of the substrate 61. The temperature sensing unit 13 is projected in a direction parallel to the upper surface of the nearest metal layer 6141. At least part of the projection of the temperature sensing unit 13 is located on the nearest metal layer 6141. The temperature sensing unit 13 can detect the temperature of the nearest metal layer 6141 or the temperature sensing unit 13 can detect the temperature of the lower plate layer 612 in contact with the nearest metal layer 6141. There are two implementation scenarios: the first implementation scenario is: see Figure 15 and Figure 17 The temperature sensing unit 13 includes a detection portion 131 and an electrical connection portion 132. The detection portion 131 is supported on the lower plate layer 613. One end of the electrical connection portion 132 is electrically connected to the detection portion 131, and the other end of the electrical connection portion 132 is electrically connected to the circuit of the lower plate layer 613. In this embodiment, the electrical connection portion is located below the detection portion 131. The electrical connection portion 132 here can be a solder point or other structure for electrical connection; the second implementation is: see Figure 16 and Figure 17The lower board layer 613 has a through hole 6130, and the temperature sensing unit 13 includes a detection part 131 and an electrical connection part 132. At least part of the detection part 131 is located in the through hole 6130 of the lower board layer 613. The detection part 131 is supported on the nearest metal layer 6141 and contacts the nearest metal layer 6141. One end of the electrical connection part 132 is electrically connected to the detection part 131, and the other end of the electrical connection part 132 is electrically connected to the circuit of the lower board layer 613. In this embodiment, the electrical connection part is located below the detection part 131. The electrical connection part 132 here can be a solder joint or other structure for electrical connection.

[0044] Through the above method, on the one hand, the temperature sensing unit 13 is integrated with the electronic oil pump 100, so that the temperature sensing unit 13 does not need to be mechanically and electrically connected to the external system separately, which is conducive to relatively reducing the mechanical connections and line connections of the system, and further conducive to simplifying the system structure, making the system structure more compact; on the other hand, in the above-mentioned first embodiment, the heat of the nearest metal layer 6141 will be transferred to the detection part 131 of the temperature sensing unit 13 through the lower plate layer. The temperature sensing unit 13 can indirectly know the temperature of the working medium in the second chamber 80 or the parameters related to the temperature of the working medium in the second chamber 80 by detecting the temperature of the lower plate layer; in the above-mentioned second embodiment, the heat of the nearest metal layer 6141 will be directly transferred to the detection part 131 of the temperature sensing unit 13. The detection part 131 can indirectly know the temperature of the working medium in the second chamber 80 or the parameters related to the temperature of the working medium in the second chamber 80 by detecting the temperature of the nearest metal layer 6141.

[0045] See also Figure 14 , the electric control board assembly 6 also includes a heat-generating electronic component 62, which is fixedly connected to the substrate 61, and the connection surface corresponding to the heat-generating electronic component 62 on the substrate 61 is opposite to the connection surface corresponding to the temperature sensing unit 13 on the substrate 61; specifically, in this embodiment, the substrate 61 includes a first surface 615 and a second surface 616, the first surface 615 is closer to the main body 51 of the isolation member 5 than the second surface 616, in this embodiment, the first surface 615 is the upper surface of the upper plate layer 612, and the second surface 616 is the lower surface of the lower plate layer 613, the temperature sensing unit 13 is fixedly connected to the second surface 616, and the heat-generating electronic component 62 is fixedly connected to the first surface 615, which is conducive to reducing the influence of the heat generated by the heat-generating electronic component 62 on the temperature sensing unit 13, thereby helping to reduce interference with the detection of the temperature sensing unit; the above-mentioned "heat-generating electronic components 62" mainly include common electronic components that are prone to heat, such as diodes, MOS tubes, inductors, resistors, and capacitors.

[0046] Compared with the first embodiment of the electronic oil pump, in this embodiment, the temperature sensing unit 13 is arranged closer to the lower surface of the substrate 61 than to the upper surface of the substrate 61, and the temperature sensing unit 13 can detect the temperature of the nearest metal layer 6141 or the temperature sensing unit 13 can detect the temperature of the lower plate layer 612 in contact with the nearest metal layer 6141; other features in this embodiment can refer to the first embodiment of the electronic oil pump, and will not be described here one by one.

[0047] See also Figure 18 , Figure 18 This is a structural 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 introduced in detail below.

[0048] See also Figure 18 and Figure 19 In this embodiment, one end of the first part 91 of the heat conductor 9 is a free end, one end of the first part 91 does not contact the stator assembly 4, and one end of the second part 92 is connected to the electric control board assembly 6; in this embodiment, the electronic oil pump 100 also includes four connecting terminals, which pass through the upper and lower surfaces of the main body 51 of the isolating member 5 and are fixedly connected to the main body 51 of the isolating member 5. Specifically, the four connecting terminals are defined as a first connecting terminal 141, a second connecting terminal 142, a third connecting terminal 143 and a fourth connecting terminal 144, wherein the first connecting terminal 141, the second connecting terminal 142 and the third connecting terminal 143 serve as the power-on pin ends of the winding 43. Specifically, one end of the first connecting terminal 141, the second connecting terminal 142 and the third connecting terminal 143 is electrically connected to the winding 43 of the stator assembly 4, the other end of the first connecting terminal 141, the second connecting terminal 142 and the third connecting terminal 143 is electrically connected to the electric control board assembly 6, and the fourth connecting terminal 144 is electrically connected to the reference ground layer of the electric control board assembly 6 and the first shell 7.

[0049] Compared with the first embodiment of the electronic oil pump, in this embodiment, the electronic oil pump also includes a connecting terminal, one end of the first part 91 of the heat conductor 9 is a free end, one end of the first part 91 is not in contact with the stator assembly 4, and one end of the second part 92 is non-electrically connected to the electronic control board assembly 6; in this way, the heat conductor is equivalent to having only the function of heat conduction, but not the function of electrical connection; other features in this embodiment can refer to the first embodiment of the electronic oil pump, which will not be described in detail here; in addition, in this embodiment, the temperature sensing unit 13 is arranged closer to the upper surface than the lower surface of the substrate, and the specific structure can refer to the temperature sensing unit in the first embodiment of the electronic oil pump. Of course, the temperature sensing unit 13 can also be arranged close to the lower surface of the substrate, and the specific structure can refer to the temperature sensing unit in the second embodiment of the electronic oil pump, which will not be described in detail here.

[0050] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although this specification has described the present application in detail with reference to the above embodiments, ordinary technicians in this field should understand that technicians in the relevant technical field can still modify or replace the present application with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present 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 cavity, a second cavity and a third cavity, the first rotor assembly being located in the first cavity, the stator assembly being arranged in the second cavity, the electronic control board assembly being arranged in the third cavity, the first cavity being connected to the second cavity, and the second cavity being not connected to the third cavity; the electronic oil pump also comprises an isolating member, at least part of the isolating member being arranged between the stator assembly and the electronic control board assembly, the second cavity being located on one side of the isolating member main body, and the third cavity being located on the other side of the isolating member main body; the electronic oil pump also comprises a heat conducting member, the heat conducting member comprising 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 control board assembly comprising a substrate, the substrate comprising a first hole, an upper plate layer, a lower plate layer and at least one metal layer, the metal layer being located Between the upper plate layer and the lower plate layer, the upper plate layer is closer to the main body of the isolation member than the lower plate layer, the first hole extends from the upper surface of the upper plate layer toward the lower plate layer, and part of the second part is located in the first hole; the electric control board assembly also includes a temperature sensing unit, the temperature sensing unit is fixedly connected to the substrate, and along the axial direction perpendicular to the electronic oil pump, the temperature sensing unit is located on one side of the second part, and there is a preset distance between the temperature sensing unit and the second part; the metal layer closest to the temperature sensing unit is defined as the nearest metal layer, and the temperature sensing unit is projected in a direction parallel to the upper surface of the nearest metal layer, and at least part of the projection of the temperature sensing unit is located in the nearest metal layer, and the temperature sensing unit can detect the temperature of the nearest metal layer or the temperature sensing unit can detect the temperature of the upper plate layer in contact with the nearest metal layer or the lower plate layer in contact with the nearest metal layer.

2. The electronic oil pump according to claim 1, characterized in that: The minimum gap distance between the temperature sensing unit and the second part is defined as a first distance (L1), the minimum distance between the nearest metal layer and the second part located in the first hole is defined as a second distance (L2), the metal layer closest to the temperature sensing unit is defined as the nearest metal layer, and the minimum distance between the nearest metal layer and the temperature sensing unit is defined as a third distance (L3), and the first distance (L1), the second distance (L2) and the third distance satisfy the following relationship: L1>L2+L3.

3. The electronic oil pump according to claim 1, characterized in that: The temperature sensing unit includes a detection part and an electrical connection part, and the detection part is supported on the upper board layer or the lower board layer; when the detection part is supported on the upper board layer, the electrical connection part is electrically connected to the circuit of the upper board layer; when the detection part is supported on the lower board layer, the electrical connection part is electrically connected to the circuit of the lower board layer.

4. The electronic oil pump according to claim 2, characterized in that: The temperature sensing unit includes a detection part and an electrical connection part, and the detection part is supported on the upper board layer or the lower board layer; when the detection part is supported on the upper board layer, the electrical connection part is electrically connected to the circuit of the upper board layer; when the detection part is supported on the lower board layer, the electrical connection part is electrically connected to the circuit of the lower board layer.

5. The electronic oil pump according to claim 1, characterized in that: The upper plate layer or the lower plate layer has a through hole, and the temperature sensing unit includes a detection part and an electrical connection part, at least part of the detection part is located in the through hole, the detection part is supported by the nearest metal layer and contacts the nearest metal layer, and the electrical connection part is electrically connected to the circuit of the upper plate layer or the lower plate layer having the through hole.

6. The electronic oil pump according to claim 2, characterized in that: The upper plate layer or the lower plate layer has a through hole, and the temperature sensing unit includes a detection part and an electrical connection part, at least part of the detection part is located in the through hole, the detection part is supported by the nearest metal layer and contacts the nearest metal layer, and the electrical connection part is electrically connected to the circuit of the upper plate layer or the lower plate layer having the through hole.

7. The electronic oil pump according to any one of claims 1 to 6, characterized in that: At least a portion of the outer surface of the second portion located in the first hole is in contact with the nearest metal layer; one end of the first portion is a free end, one end of the first portion does not contact the stator assembly, and one end of the second portion is not electrically connected to the electric control board assembly.

8. The electronic oil pump according to any one of claims 1 to 6, characterized in that: At least a portion of the outer surface of the second portion located in the first hole is in contact with the nearest metal layer; one end of the first portion is connected to the stator assembly, and one end of the second portion is electrically connected to the electric control board assembly.

9. The electronic oil pump according to claim 8, characterized in that: The stator assembly includes a stator core, a winding, and an insulating frame. At least a portion of the insulating frame is covered on the surface of the stator core. The winding is wound on the insulating frame. One end of the first part is connected to the insulating frame. The first part is electrically connected to the winding. The heat conductor can serve as the power pin end of the winding.

10. The electronic oil pump according to claim 8, characterized in that: The heat conductor is electrically connected to the reference ground layer of the electric control board assembly; the stator assembly includes a stator core, a winding and an insulating frame, at least a portion of the insulating frame is covered on the surface of the stator core, the winding is wound on the insulating frame, one end of the first part is connected to the insulating frame, and the first part and the winding are non-electrically connected.

11. The electronic oil pump according to claim 10, characterized in that: The material of the heat conductor is a conductive metal material; the electronic oil pump also includes a conductive member, which is located in the second cavity and contacts the second part; the pump housing includes a first housing, at least part of the conductive member is located in the inner cavity of the first housing, the material of the first housing is a metal material, and the conductive member is arranged in contact with the first housing or the stator core.

12. The electronic oil pump according to any one of claims 5 to 6, characterized in that: The electric control board assembly further includes a heat-generating electronic component connected to the substrate, and a connection surface of the heat-generating electronic component on the substrate and a connection surface of the temperature sensing unit on the substrate are opposite to each other.

13. The electronic oil pump according to claim 7, characterized in that: The electric control board assembly further includes a heat-generating electronic component connected to the substrate, and a connection surface of the heat-generating electronic component on the substrate and a connection surface of the temperature sensing unit on the substrate are opposite to each other.

14. The electronic oil pump according to claim 8, characterized in that: The electric control board assembly further includes a heat-generating electronic component connected to the substrate, and a connection surface of the heat-generating electronic component on the substrate and a connection surface of the temperature sensing unit on the substrate are opposite to each other.

15. The electronic oil pump according to claim 9, characterized in that: The electric control board assembly further includes a heat-generating electronic component connected to the substrate, and a connection surface of the heat-generating electronic component on the substrate and a connection surface of the temperature sensing unit on the substrate are opposite to each other.

16. The electronic oil pump according to claim 10, characterized in that: The electric control board assembly further includes a heat-generating electronic component connected to the substrate, and a connection surface of the heat-generating electronic component on the substrate and a connection surface of the temperature sensing unit on the substrate are opposite to each other.

17. The electronic oil pump according to claim 11, characterized in that: The electric control board assembly further includes a heat-generating electronic component connected to the substrate, and a connection surface of the heat-generating electronic component on the substrate and a connection surface of the temperature sensing unit on the substrate are opposite to each other.

18. The electronic oil pump according to any one of claims 1 to 6, characterized in that: Along the axial direction of the electronic oil pump, the heat conductor passes through the main body of the isolation member; the heat conductor 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 isolation member, and the connection between the connecting portion and the isolation member is sealed.

19. The electronic oil pump according to claim 7, characterized in that: Along the axial direction of the electronic oil pump, the heat conductor passes through the main body of the isolation member; the heat conductor 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 isolation member, and the connection between the connecting portion and the isolation member is sealed.

20. The electronic oil pump according to claim 8, characterized in that: Along the axial direction of the electronic oil pump, the heat conductor passes through the main body of the isolation member; the heat conductor 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 isolation member, and the connection between the connecting portion and the isolation member is sealed.

21. The electronic oil pump according to claim 9, characterized in that: Along the axial direction of the electronic oil pump, the heat conductor passes through the main body of the isolation member; the heat conductor 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 isolation member, and the connection between the connecting portion and the isolation member is sealed.

22. The electronic oil pump according to claim 10, characterized in that: Along the axial direction of the electronic oil pump, the heat conductor passes through the main body of the isolation member; the heat conductor 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 isolation member, and the connection between the connecting portion and the isolation member is sealed.

23. The electronic oil pump according to claim 11, characterized in that: Along the axial direction of the electronic oil pump, the heat conductor passes through the main body of the isolation member; the heat conductor 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 isolation member, and the connection between the connecting portion and the isolation member is sealed.

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