Electronic oil pump

Abstract

An electronic oil pump comprises a stator assembly and an electric control board assembly, the stator assembly is electrically connected with the electric control board assembly, the stator assembly comprises a stator core and a winding, the stator core can provide support for winding winding; the electronic oil pump comprises a shielding piece, the stator assembly, at least part of the shielding piece and the electric control board assembly are distributed along the axial direction of the electronic oil pump, at least part of the shielding piece is located between the stator assembly and the electric control board assembly; the material of the shielding piece is a conductive metal material, at least part of the shielding piece covers at least part of the winding; thus, it is beneficial to reduce the influence of the electromagnetic wave generated by the winding on the performance of the electric control board assembly.

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 primarily provides a power source for the vehicle's lubrication and / or cooling systems. The electronic oil pump includes a stator assembly and an electronic control board assembly, which are electrically connected. The stator assembly includes windings, which generate electromagnetic waves when energized. These electromagnetic waves may radiate toward the location of the electronic control board assembly, potentially affecting its performance and consequently the performance of the electronic oil pump. Summary of the Invention

[0003] The purpose of this application is to provide an electronic oil pump that helps reduce the impact of electromagnetic waves generated by the windings on the performance of the electronic control board components.

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

[0005] An electronic oil pump includes a stator assembly and an electronic control board assembly, the stator assembly being electrically connected to the electronic control board assembly. The stator assembly includes a stator core and windings, the stator core providing support for the winding of the windings. The electronic oil pump includes a shield, the stator assembly, at least a portion of the shield, and the electronic control board assembly being distributed along the axial direction of the electronic oil pump, with at least a portion of the shield located between the stator assembly and the electronic control board assembly. The shield is made of a conductive metallic material, and at least a portion of the shield covers at least a portion of the windings.

[0006] The above method enables the shielding to absorb and reflect electromagnetic waves radiated from the windings to the side where the electronic control board assembly is located, thereby helping to reduce the impact of electromagnetic waves generated by the windings on the performance of the electronic control board assembly. Attached Figure Description

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

[0008] Figure 2 yes Figure 1 A front view of the electronic oil pump after removing the pump cover;

[0009] Figure 3 yes Figure 1 A three-dimensional structural diagram of an insulator and conductive component assembled together;

[0010] Figure 4 yes Figure 3A front view schematic diagram of the assembly of the central isolation component and the conductive component;

[0011] Figure 5 yes Figure 4 A schematic diagram of a cross-sectional structure along the AA direction;

[0012] Figure 6 yes Figure 1 A three-dimensional structural diagram of the central control board assembly and conductive components assembled together;

[0013] Figure 7 yes Figure 6 A front view of the assembly of the central control board and conductive components;

[0014] Figure 8 yes Figure 7 A schematic diagram of a cross-sectional structure along the AA direction;

[0015] Figure 9 yes Figure 1 A three-dimensional structural diagram of a conductive component;

[0016] Figure 10 The image on the left is Figure 9 A three-dimensional structural diagram of the first conductive part in the middle;

[0017] Figure 10 The diagram on the right is an enlarged structural diagram of part A of the first conductive part in the diagram on the left.

[0018] Figure 11 yes Figure 9 A three-dimensional structural diagram of the second conductive part in the middle;

[0019] Figure 12 This is a cross-sectional structural schematic diagram of a second embodiment of the electronic oil pump of this application;

[0020] Figure 13 yes Figure 12 A three-dimensional structural diagram of an insulator, conductive component, and shielding component assembled together;

[0021] Figure 14 yes Figure 13 A front view schematic diagram of the assembly of the isolation component, conductive component and shielding component;

[0022] Figure 15 yes Figure 14 A schematic diagram of a cross-sectional structure along the AA direction;

[0023] Figure 16 yes Figure 12 A three-dimensional structural diagram of the shielding component;

[0024] Figure 17 yes Figure 12 A three-dimensional structural diagram of a conductive component;

[0025] Figure 18 This is a cross-sectional structural schematic diagram of the third embodiment of the electronic oil pump of this application;

[0026] Figure 19 yes Figure 18 A three-dimensional structural diagram of an insulator, conductive component, and shielding component assembled together;

[0027] Figure 20 This is a cross-sectional structural schematic diagram of the fourth embodiment of the electronic oil pump of this application;

[0028] Figure 21 yes Figure 20 A three-dimensional structural diagram of an insulator, conductive component, and shielding component assembled together;

[0029] Figure 22 This is a cross-sectional structural schematic diagram of the fifth embodiment of the electronic oil pump of this application. Detailed Implementation

[0030] The present application will be further described below with reference to the accompanying drawings and specific embodiments:

[0031] 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.

[0032] See 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 forms a pump cavity. The first rotor assembly 2, stator assembly 4, second rotor assembly 3, and electronic control board assembly 6 are located 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 located in the first cavity 70, the stator assembly 4 and the second rotor assembly 3 are located in the second cavity 80, and the electronic control board assembly 6 is located 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. The stator assembly 4 includes a stator core 41, an insulating frame 42, and a winding 43. The insulating frame 42 covers at least a portion of the surface of the stator core 41, and the winding 43 is wound around it. 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 part 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 90 can cool the stator assembly 4, which is beneficial to the heat dissipation of the stator assembly 4.

[0033] 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.

[0034] See Figure 1 and Figure 2The 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 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 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 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 sucked into the hydraulic chamber 801 from the inlet 11. When the first rotor 21 and the second rotor 22 continue to rotate, the volume of the hydraulic chamber 801, which was originally filled with the working medium, gradually decreases. The working medium is compressed, thereby forcing the working medium entering the hydraulic chamber 801 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 the pump shaft 15 is connected 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.

[0035] 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.

[0036] See Figure 1The electronic oil pump 100 also includes a conductive element 9, which is electrically connected to the reference ground plane of the electronic control board assembly 6 and the first housing 7. The first housing 7 is conductive. At least a portion of the conductive element 9 is located within the inner cavity of the first housing 7. The first housing 7 is made of metal and partially surrounds the outer periphery of the stator assembly 4. The stator assembly 4 is located within the inner cavity of the first housing 7. Thus, when the winding 43 of the stator assembly 4 radiates electromagnetic waves outward or when an external system radiates electromagnetic waves to the first housing 7, the first housing 7 itself can absorb and reflect the electromagnetic waves radiated by the winding 43, which helps prevent the electromagnetic waves radiated by the winding from affecting the external system. On the other hand, the first housing 7 itself can absorb and reflect the electromagnetic waves radiated by the external system, which helps prevent the electromagnetic waves radiated by the external system from affecting the performance of the electronic oil pump. Specifically, see Figure 1The conductive element 9 includes a first part 911 and a second part 921. The first part 911 is electrically connected to the reference ground plane of the electronic control board assembly 6, and the second part 921 abuts against the inner wall of the first housing 7. The reference ground plane of the electronic control board assembly 6 is electrically conducted to the first housing 7 through the conductive element 9. In this way, since the first housing 7 is electrically connected to the reference ground plane of the electronic control board assembly 6, firstly, a low-impedance path can be provided for the interference voltage in the electronic control board assembly, thereby helping to reduce the electromagnetic radiation of the electronic control board assembly, and further helping to reduce the interference of the electromagnetic radiation of the electronic control board assembly to electronic components and / or other external devices; secondly, when the surface of the first housing 7 has static electricity, the static electricity on the surface of the first housing 7 can be conducted to the reference ground plane of the electronic control board assembly 6 through the conductive element 9. When the reference ground plane of the control board assembly 6 is grounded externally, the static electricity of the reference ground plane of the control board assembly 6 is 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 control board assembly 6. Third, when there is static electricity on the surface of the control board assembly 6, the static electricity on the surface of the control board assembly 6 can be conducted to the first housing 7 through the conductive element 6. This helps to reduce the static electricity accumulated on the surface of the control board assembly 6, and thus helps to reduce the impact of the static electricity accumulated on the surface of the control board assembly 6 on the performance of the external system and / or electronic components. In addition, in this embodiment, the pump cover 1, the first housing 7 and the second housing 8 are made of metal, and the stator core 41 The first housing 7 is in contact with the second housing 8, and the pump cover 1 is in contact with the first housing 7. This ensures that the stator core 41 and the second housing 8 are electrically connected to the reference ground plane of the electronic control board assembly. This allows static electricity on the surfaces of the stator core 41, the second housing 8, and the pump cover 1 to be conducted to the reference ground plane of the electronic control board assembly 6, and then conducted to the external grounding point. This helps reduce the impact of static electricity on the electronic control board assembly and / or other external devices. Furthermore, it increases the grounding area of ​​the electronic oil pump, providing a low-impedance path for interference voltages in the electronic control board assembly and the stator assembly, thereby reducing electromagnetic radiation from the electronic control board assembly and the stator assembly, and consequently reducing interference from electromagnetic radiation from the electronic control board assembly and the stator assembly to electronic components and / or other external devices. In this embodiment, the pump cover 1, the first housing 7, and the second housing 8 are made of metal. Alternatively, the first housing 7 can be made of metal, and the pump cover 1 and the second housing 8 can be made of non-metallic materials. See also... Figure 1 In this embodiment, one end of the conductive element 9 contacts the first housing 7. Of course, at this time, one end of the conductive element 9 can also contact the stator core 41 or the second housing 8.

[0037] See Figure 1 and Figure 3The electronic oil pump 100 also includes an isolator 5, at least a portion of which is disposed between the stator assembly 4 and the electronic control board assembly 6. A second cavity 80 is located on one side of the main body 51 of the isolator 5, and a third cavity 90 is located on the other side of the main body 51 of the isolator 5. In this embodiment, a portion of the conductive element 9 is fixedly connected to the main body 51 of the isolator 5. Along a direction parallel to the axial direction of the electronic oil pump, the portion of the conductive element 9 passes through the main body 51 of the isolator 5. Specifically, in this embodiment, the portion of the conductive element 9 is used as an insert, and the isolator 5 is injection molded. That is, the portion of the conductive element 9 and the isolator 5 are fixedly connected by injection molding, and the connection between the conductive element 9 passing through the isolator 5 and the isolator 5 is sealed. See also... Figures 3 to 5 The isolator 5 includes a first protrusion 52, which protrudes from the upper surface of the main body of the isolator 5, and a portion of the conductive element 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 isolator 5. The conductive element 9 that passes through the main body of the isolator 5 passes through the groove 521. There is a gap between the outer periphery of the conductive element 9 and the inner wall of the groove 521, and the gap is filled with sealant. This helps to prevent the working medium in the second cavity 80 from leaking into the third cavity 90 through the connection between the conductive element 9 and the isolator 5, thereby helping to prevent the performance of the electronic control board assembly 6 located in the third cavity 90 from being affected.

[0038] See Figures 6 to 8 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 stator assembly 4 than the second surface 616. The substrate 61 includes a through hole 611, which is disposed through the substrate along a thickness direction parallel to the substrate 61. The first part 911 of the conductive member 9 extends into the through hole 611 and is tightly fitted with the through hole 611. In this embodiment, the first part 911 of the conductive member 9 is connected to the substrate 61 by providing a through hole 611 on the substrate 61. Alternatively, an abutment part can be provided on the electronic control board assembly 6. The abutment part is located on the first surface 615 and is electrically connected to the reference ground layer of the electronic control board assembly 6. The first part 911 is in contact with the abutment part and is electrically connected to the abutment part. Here, the "abutment part" can be a separate conductive component that is fixedly connected to the substrate 61, or it can be a conductive layer, which can be a tin plating layer, electroless nickel plating, or immersion gold plating.

[0039] See Figures 9 to 10 In this embodiment, the conductive element 9 is at least partially elastic. The elastic conductive element 9 includes an inclined portion 922, the front end of which is connected to the second portion 921, or the second portion 921 is located at the front end of the inclined portion 922. The inclined portion 922 and the second portion 921 are integrally formed. (See also...) Figure 1 The inclined portion 922 is set at an angle to the inner wall of the first housing 7, and the first housing 7 exerts a force on the inclined portion 922, which helps to improve the reliability of the contact between the second portion 921 and the first housing 7.

[0040] Specifically, see Figures 9 to 11 The conductive component 9 includes a first conductive portion 91 and a second conductive portion 92. In this embodiment, the first conductive portion 91 and the second conductive portion 92 are separately disposed. "Separately disposed" means that the first conductive portion 91 and the second conductive portion 92 are processed separately and then assembled. Of course, the first conductive portion 91 and the second conductive portion 92 can also be an integral structure. "Integrated structure" means that the first conductive portion 91 and the second conductive portion 92 are processed into a single unit. See also... Figures 9 to 11 In this embodiment, the first part 911 is formed on the first conductive part 91, and the second part 921 and the inclined part 922 are formed on the second conductive part 92. The second conductive part 92 is elastic, and the first conductive part 91 and the second conductive part 92 are in contact and connected. (See also...) Figure 1 , Figures 9 to 11 In this embodiment, one end of the first conductive part 91 is electrically connected to the reference ground plane of the electronic control board assembly 6, and the other end of the first conductive part 91 is connected to the insulating frame 42. The first conductive part 91 and Figure 1 The winding 43 in the middle is non-electrically connected.

[0041] See Figures 9 to 11 In this embodiment, the second conductive part 92 further includes a body part 923 and a limiting part 924. The first conductive part 91 is partially in contact with the body part 923. One end of the limiting part 924 is connected to the first side surface 9231 of the body part 923, and the other end of the limiting part 924 is connected to the second side surface 9232 of the body part 923. The inclined part 922 is connected to the upper end of the body part 923. In this embodiment, the inclined part 922 is connected to the upper end of the body part 923 via an arc. The second part 921 is located on one side of the body part 923, and part of the limiting part 924 is located on the other side of the body part 923. The limiting part 924 has a receiving cavity 9240 through which the first conductive part 91 passes. (See also...) Figure 9 The first conductive part 91 passes through the limiting part 924, with one end of the first conductive part 91 located on one side of the limiting part 924, and the other end of the second conductive part 92 located on the other side of the limiting part 924; see also Figures 9 to 11 The first conductive part 91 includes a first limiting surface 912. The lower end surface 9241 of the limiting part 924 of the second conductive part 92 is located above the first limiting surface 912, or the lower end surface 9241 of the limiting part 924 abuts against the first limiting surface 912. This can prevent the second limiting part 924 from sliding down along the length direction of the first conductive part 91.

[0042] See Figure 10 In this embodiment, the first conductive part 91 further includes a mating surface 913 and a second limiting surface 914. One end of the first limiting surface 912 is connected to one end of the mating surface 913, and one end of the second limiting surface 914 is connected to the other end of the mating surface 913. (See also...) Figures 9 to 11 At least part of the mating surface 913 is located within the receiving cavity 9240 of the limiting portion 924. The first limiting surface 912 is located on one side of the limiting portion 924, and the second limiting surface 914 is located on the other side of the limiting portion 924. This prevents the second limiting portion 924 from sliding up and down along the length of the first conductive portion 91. See also Figure 10 The first conductive portion 91 also includes a bevel 915, one end of which is connected to the other end of the second limiting surface 914. Along the length of the first conductive portion 91, the bevel 915 is located above the mating surface 913. (See also...) Figure 11 The limiting part 924 also includes a first sub-part 9242 and a second sub-part 9243. The first end of the first sub-part 9242 is connected to the first side surface 9231 of the main body 923, and the second end 9244 of the first sub-part 9242 is a free end. The first end of the second sub-part 9243 is connected to the second side surface 9232 of the main body 923, and the second end 9245 of the second sub-part 9243 is a free end. The second end 9244 of the first sub-part 9242 and the second end 9245 of the second sub-part 9243 are at a predetermined distance. (See also...) Figures 9 to 11 Thus, when the limiting part 924 of the second conductive part is inserted from the upper end of the first conductive part 91, when the side wall corresponding to the receiving cavity 9240 of the limiting part 924 contacts the inclined surface 915 of the first conductive part 91, the first sub-part 9242 and the second sub-part 9243 can undergo elastic deformation, thereby allowing the mating surface 913 to be located in the receiving cavity 9240 of the limiting part 924, thereby realizing the limiting connection between the second conductive part 92 and the first conductive part 91; in this embodiment, after the second conductive part 92 and the first conductive part 91 are limitedly connected, the second conductive part 92 and the first conductive part 91 are fixedly set by welding.

[0043] See Figure 12 , Figure 12 This is a schematic diagram of the structure of the second embodiment of the electronic oil pump in this application; the structure of the second embodiment of the electronic oil pump will be described in detail below.

[0044] See Figure 12In this embodiment, the electronic oil pump 100a further includes a shield 10. The stator assembly 4, the shield 10, and the electronic control board assembly 6 are distributed along the axial direction of the electronic oil pump. At least a portion of the shield 10 is located between the stator assembly 4 and the electronic control board assembly 6. The shield 10 is made of a conductive metal material, and at least a portion of the shield 10 covers at least a portion of the winding 43. In this way, the shield 10 can absorb and reflect at least a portion of the electromagnetic waves radiated from the winding 43 toward the electronic control board assembly 6, thereby helping to reduce the interference of the electromagnetic waves generated by the winding 43 on the electronic control board assembly 6.

[0045] See Figure 12 and Figure 13 In this embodiment, the shield 10 is fixedly connected to the isolation member 5. Of course, the shield 10 and the isolation member 5 can also be limited. Specifically, in this embodiment, the shield 10 is located between the stator assembly 4 and the main body 51 of the isolation member 5. The shield 10 is fixedly connected to the main body 51 of the isolation member 5. Of course, the shield 10 can also be limited to the main body 51 of the isolation member 5.

[0046] Specifically, see Figures 13 to 16 The isolator 5 also includes at least two protruding posts 53, which protrude from the upper end face of the main body 51 of the isolator 5 along the axial direction of the isolator 5; the shield 10 includes at least two through holes 101, through which the protruding posts 53 pass, and the shield 10 and the isolator 5 can be fixedly connected by hot riveting the part of the protruding post 53 that extends out of the through hole 101; of course, the shield 10 can also be used as an insert to form the isolator 5 by injection molding, that is, the shield 10 and the isolator 5 are injection molded together.

[0047] See Figures 12 to 17The electronic oil pump 100a also includes a conductive element 9, which passes through the main body 51 of the insulating member 5. The conductive element 9 includes a first part 911 and an upper part 925. The first part 911 is electrically connected to the reference ground plane of the electronic control board assembly 6. In this embodiment, the upper part 925 of the conductive element 9 is in contact with the shielding member 10. The conductive element 9 is electrically connected to the reference ground plane of the electronic control board assembly 6 and the shielding member 10. In this way, the shielding member 10 is indirectly electrically connected to the reference ground plane of the electronic control board assembly 6. This firstly provides a low-impedance path for the interference voltage in the stator assembly, thereby reducing the electromagnetic radiation of the stator assembly and thus reducing the interference of the electromagnetic radiation generated by the stator assembly to the electronic control board assembly and / or other external devices. Secondly, when the surface of the shielding member 10 has static electricity, it can reduce the static electricity on the surface of the shielding member 10. The static electricity on the surface 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 conducted to 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 shielding component 10, and thus helps to reduce the impact of the static electricity on the surface of the shielding component 10 on the performance of external systems and / or electronic components. Third, when there is static electricity on the surface of the electronic control board assembly 6, the static electricity on the surface of the electronic control board assembly 6 can be conducted to the shielding component 10 through the conductive component 6. This helps to reduce the static electricity accumulated on the surface of the electronic control board assembly 6, and thus helps to reduce the impact of the static electricity accumulated on the surface of the electronic control board assembly 6 on the performance of external systems and / or electronic components.

[0048] See Figure 12 In this embodiment, the upper part 925 of the conductive element 9 is connected to the insulating frame 42, and the conductive element 9 is not electrically connected to the winding 43. Of course, the top end of the upper part 925 of the conductive element 9 can also be a free end, in which case the upper part 925 of the conductive element 9 is not connected to the insulating frame 42 or other components.

[0049] See Figure 16 The shielding component 10 includes a base portion 102 and a lead-out portion 103. The lead-out portion 103 is connected to the peripheral side surface of the base portion 102 and is protruding. Specifically, in this embodiment, the base portion 102 and the lead-out portion 103 are an integral structure. Of course, the base portion 102 and the lead-out portion 103 can also be separately arranged and fixedly connected. See [link to documentation]. Figure 15 and Figure 16 In this embodiment, the lead-out portion 103 is in contact with the upper part 925 of the conductive member 9. The lead-out portion 103 is elastic and includes an inclined section 1031. The main body of the inclined section 1031 is set at an angle to the conductive member 9, and the front end of the inclined section 1031 is in contact with the conductive member 9. This helps to improve the reliability of the contact between the lead-out portion 103 and the conductive member 9.

[0050] Compared with the first embodiment of the electronic oil pump, in this embodiment, the electronic oil pump 100a further includes a shield 10, and the conductive element 9 connects the reference ground plane of the electronic control board assembly 6 and the shield 10; 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.

[0051] See Figure 18 , Figure 18 This is a schematic diagram of the third embodiment of the electronic oil pump in this application; the structure of the third embodiment of the electronic oil pump will be described in detail below.

[0052] See Figure 18 and Figure 19 In this embodiment, the electronic oil pump 100b further includes a shielding member 10, which is located between the main body 51 of the isolation member 5 and the electronic control board assembly 6. The shielding member 10 is fixedly connected to the main body 51 of the isolation member 5. Of course, the shielding member 10 can also be limited to the main body 51 of the isolation member 5. Specifically, see Figure 19 The isolator 5 also includes at least two protruding posts 53, which protrude from the lower end face of the main body 51 of the isolator 5 along the axial direction of the isolator 5; the shield 10 includes at least two through holes, through which the protruding posts 53 pass, and the shield 10 and the isolator can be fixedly connected by hot riveting the part of the protruding post 53 that extends out of the through hole; of course, the shield 10 can also be used as an insert to form the isolator by injection molding, that is, the shield 10 and the isolator 5 are injection molded together.

[0053] Compared with the second embodiment of the electronic oil pump, in this embodiment, the shield 10 is located between the main body 51 of the isolation member 5 and the electronic control board assembly 6; other features in this embodiment can be referred to the second embodiment of the electronic oil pump, and will not be described in detail here.

[0054] See Figure 20 , Figure 20 This is a schematic diagram of the fourth embodiment of the electronic oil pump in this application; the structure of the fourth embodiment of the electronic oil pump will be described in detail below.

[0055] See Figure 20 and Figure 21In this embodiment, the electronic oil pump 100c includes a conductive element 9, which is electrically connected to the reference ground plane of the electronic control board assembly 6 and the first housing 7. The first housing 7 is conductive. Specifically, the conductive element 9 includes a first part 911 and a second part 912. The first part 911 is electrically connected to the reference ground plane of the electronic control board assembly 6, and the second part 912 abuts against the inner wall of the first housing 7. The reference ground plane of the electronic control board assembly 64 is electrically conducted to the first housing 7 through the conductive element 9. The electronic oil pump 100c also includes a shielding element 10, which is located between the main body 51 of the isolation member 5 and the stator assembly 4. The shield 10 is fixedly connected to the isolator 5 and contacts the conductive element 9. Since part of the conductive element 9 is electrically connected to the reference ground plane of the electronic control board assembly 6, and another part of the conductive element 9 is in contact with the first housing 7, the shield 10 can also be indirectly electrically connected to the reference ground plane of the electronic control board assembly 6. By means of this, both the first housing 7 and the shield 10 are indirectly electrically connected to the reference ground plane of the electronic control board assembly 6. Firstly, this provides a low-impedance path for interference voltage in the stator assembly and the electronic control board assembly, thereby reducing electromagnetic radiation from the stator assembly and the electronic control board assembly, and thus reducing interference from electromagnetic radiation generated by the stator assembly and the electronic control board assembly to electronic components and / or other external devices. Secondly, when the surfaces of the first housing 7 and the shield 10 have static electricity, this static electricity can be 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 conducted to the reference ground plane of the electronic control board assembly 6 is then conducted to the external grounding point, thus reducing the impact on the first housing 7 and the shield 10. The static electricity accumulated on the surface of the first housing 7 and the shield 10 helps to reduce the impact of static electricity on the performance of external systems and / or electronic components; thirdly, when the surface of the electronic control board assembly 6 has static electricity, the static electricity on the surface of the electronic control board assembly 6 can be conducted to the first housing 7 and the shield 10 through the conductive element 6, which helps to reduce the static electricity accumulated on the surface of the electronic control board assembly 6, and thus helps to reduce the impact of static electricity accumulated on the surface of the electronic control board assembly 6 on the performance of external systems and / or electronic components; in addition, this embodiment 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 ensures that the stator core 41 and the second housing 8 are electrically connected to the reference ground plane of the electronic control board assembly. In this way, the electrostatic waves on 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. The electrostatic waves conducted to the reference ground plane of the electronic control board assembly 6 are then conducted to the external grounding point. This helps to reduce the impact of electrostatics on the electronic control board assembly and / or other external devices.On the other hand, it can increase the grounding area of ​​the electronic oil pump, which provides a low-impedance path for interference voltages in the electronic control board assembly and stator assembly, thereby helping to reduce the electromagnetic radiation of the electronic control board assembly and stator assembly, and further helping to reduce the interference of the electromagnetic radiation of the electronic control board assembly and stator assembly to electronic components and / or other external devices; In this embodiment, the pump cover 1, the first housing 7 and the second housing 8 are made of metal. Of course, the first housing 7 can also be made of metal and the pump cover 1 and the second housing 8 can be made of non-metal. See also; Figure 1 In this embodiment, one end of the conductive element 9 contacts the first housing 7. Of course, at this time, one end of the conductive element 9 can also contact the stator core 41 or the second housing 8.

[0056] Compared with the first embodiment of the electronic oil pump, in this embodiment, the electronic oil pump 100c further includes a shielding member 10, which contacts the conductive member 9. The conductive member in this embodiment can refer to the conductive member in the first embodiment of the electronic oil pump, and the shielding member in this embodiment can refer to the shielding member in the second embodiment of the electronic oil pump. They will not be described in detail here.

[0057] See Figure 22 , Figure 22 This is a schematic diagram of the fifth embodiment of the electronic oil pump in this application; the structure of the fifth embodiment of the electronic oil pump will be described in detail below.

[0058] See Figure 22In this embodiment, the electronic oil pump 100d includes a conductive element 9, which is electrically connected to the reference ground plane of the electronic control board assembly 6 and the first housing 7. The first housing 7 is conductive. Specifically, the conductive element 9 includes a first part 911 and a second part 912. The first part 911 is electrically connected to the reference ground plane of the electronic control board assembly 6, and the second part 912 abuts against the inner wall of the first housing 7. The reference ground plane of the electronic control board assembly 64 is electrically conducted to the first housing 7 through the conductive element 9. The electronic oil pump 100c also includes a shielding element 10, which is located at... Between the main body 51 of the isolator 5 and the electronic control board assembly 6, the shield 10 is fixedly connected to the isolator 5. The shield 10 is in contact with the conductive member 9. Since part of the conductive member 9 is electrically connected to the reference ground plane of the electronic control board assembly 6, and another part of the conductive member 9 is in contact with the first housing 7, the shield 10 can also be indirectly electrically connected to the reference ground plane of the electronic control board assembly 6. In this way, firstly, a low impedance path can be provided for the interference voltage in the stator assembly and the electronic control board assembly, thereby helping to reduce the interference voltage in the stator assembly and the electronic control board assembly. The electromagnetic radiation from the control board assembly is reduced, thus helping to decrease the interference of electromagnetic radiation generated by the stator assembly and the control board assembly on electronic components and / or other external devices. Secondly, when the surfaces of the first housing 7 and the shield 10 are statically charged, the static electricity on the surfaces of the first housing 7 and the shield 10 can be conducted to the reference ground plane of the control board assembly 6. When the reference ground plane of the control board assembly 6 is grounded externally, the static electricity conducted to the reference ground plane of the control board assembly 6 is then conducted to the external grounding point. This helps to reduce the static electricity accumulated on the surfaces of the first housing 7 and the shield 10, thereby reducing the impact of the static electricity on the surfaces of the first housing 7 and the shield 10 on the performance of external systems and / or electronic components. Thirdly, when the surface of the control board assembly 6 is statically charged, the static electricity on the surface of the control board assembly 6 can be conducted to the first housing 7 and the shield 10 through the conductive element 6. This helps to reduce the static electricity accumulated on the surface of the control board assembly 6, thereby reducing the impact of the static electricity accumulated on the surface of the control board assembly 6 on the performance of external systems and / or electronic components.

[0059] Compared with the first embodiment of the electronic oil pump, in this embodiment, the electronic oil pump 100d further includes a shield 10, which contacts the conductive element 9. The conductive element in this embodiment can refer to the conductive element in the first embodiment of the electronic oil pump, and the shield in this embodiment can refer to the shield in the third embodiment of the electronic oil pump. They will not be described in detail here.

[0060] 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 electric oil pump comprising a stator assembly, an electrically conductive member, a first housing, and an electric control board assembly, the first housing encircles an outer periphery of the stator assembly, the stator assembly is electrically connected with the electric control board assembly, the stator assembly comprises a stator core and a winding, the stator core is capable of providing support for winding of the winding; characterized in that: The electronic oil pump comprises a shield, the stator assembly, at least part of the shield and the electric control board assembly are distributed along the axial direction of the electronic oil pump, at least part of the shield is located between the stator assembly and the electric control board assembly; the shield is made of conductive metal material, at least part of the shield covers at least part of the winding, the conductive part is electrically connected to the reference ground layer of the electric control board assembly and the first shell; The stator assembly further comprises an insulating frame, the conductive part comprises a first conductive part and a second conductive part, the first conductive part and the second conductive part are separately arranged, the first conductive part is in contact with the second conductive part and is connected, one end of the first conductive part is connected with the insulating frame or one end of the first conductive part is a free end, the second conductive part is in contact with the first shell, and the shield is in contact with the first conductive part.

2. The electric oil pump according to claim 1, characterized in that: The electronic oil pump further comprises a spacer, at least part of the spacer is located between the stator assembly and the electric control board assembly; the shield is connected with the spacer.

3. The electric oil pump according to claim 2, characterized in that: The spacer further comprises at least two protruding columns and a main body part, along the axial direction of the spacer, the protruding columns are protrudingly arranged from the end surface of the main body part; the shield comprises at least two through holes, the protruding columns pass through the through holes, and the shield and the spacer are fixedly connected by hot riveting the part of the protruding columns that protrudes out of the through holes.

4. The electric oil pump of claim 2, wherein: The spacer comprises a main body part, the shield is located between the stator assembly and the main body part; the shield is fixedly connected with the main body part or is limitingly arranged.

5. The electric oil pump of claim 2, wherein: The spacer comprises a main body part, the shield is located between the stator assembly and the main body part; the shield is fixedly connected with the main body part or is limitingly arranged.

6. The electric oil pump of claim 2, wherein: The spacer comprises a main body part, the shield is located between the main body part and the electric control board assembly; the shield is fixedly connected with the main body part.

7. The electric oil pump of claim 3, wherein: The spacer comprises a main body part, the shield is located between the main body part and the electric control board assembly; the shield is fixedly connected with the main body part.

8. The electric oil pump according to any one of claims 1 to 7, characterized in that: The electronic oil pump further comprises a conductive part, the conductive part comprises a first part, the first part is electrically connected to the reference ground layer of the electric control board assembly, the shield is in contact with the conductive part, and the conductive part is electrically connected to the reference ground layer of the electric control board assembly and the shield.

9. The electric oil pump of claim 8, wherein: The insulating frame is wrapped on the surface of at least part of the stator core, the winding is wound on the insulating frame, the conductive part further comprises an upper part, the upper part is connected with the insulating frame or the top end of the upper part is a free end, and the conductive part is not electrically connected with the winding.

10. The electric oil pump of claim 8, wherein: One end of the first conductive part is electrically connected to the reference ground layer of the electric control board assembly, the other end of the first conductive part is connected with the insulating frame or the other end of the first conductive part is a free end, and the first conductive part is not electrically connected with the winding.

11. The electric oil pump of claim 8, wherein: The shield comprises a base part and a lead-out part, the base part and the lead-out part are fixedly connected or integrally arranged, and the lead-out part is in contact with the conductive part.

12. The electric oil pump of claim 9, wherein: The shielding member comprises a base part and a leading-out part, the base part and the leading-out part are fixedly connected or integrally arranged, and the leading-out part is arranged in contact with the conductive part.

13. The electric oil pump of claim 10, wherein: The shielding member comprises a base part and a leading-out part, the base part and the leading-out part are fixedly connected or integrally arranged, and the leading-out part is arranged in contact with the conductive part.

14. The electric oil pump of claim 11, wherein: The leading-out part is connected with the circumferential surface of the base part, the leading-out part is in a convex shape, the leading-out part has elasticity, the leading-out part comprises an inclined section, the main body section of the inclined section is arranged at an angle with the conductive part, and the front end of the inclined section is arranged in contact with the conductive part.

15. The electric oil pump of claim 12, wherein: The leading-out part is connected with the circumferential surface of the base part, the leading-out part is in a convex shape, the leading-out part has elasticity, the leading-out part comprises an inclined section, the main body section of the inclined section is arranged at an angle with the conductive part, and the front end of the inclined section is arranged in contact with the conductive part.

16. The electric oil pump of claim 13, wherein: The leading-out part is connected with the circumferential surface of the base part, the leading-out part is in a convex shape, the leading-out part has elasticity, the leading-out part comprises an inclined section, the main body section of the inclined section is arranged at an angle with the conductive part, and the front end of the inclined section is arranged in contact with the conductive part.

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