WO2021185131A1 - 电动泵 - Google Patents

电动泵 Download PDF

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Publication number
WO2021185131A1
WO2021185131A1 PCT/CN2021/079937 CN2021079937W WO2021185131A1 WO 2021185131 A1 WO2021185131 A1 WO 2021185131A1 CN 2021079937 W CN2021079937 W CN 2021079937W WO 2021185131 A1 WO2021185131 A1 WO 2021185131A1
Authority
WO
WIPO (PCT)
Prior art keywords
control board
conductive
connecting end
electric pump
stator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/079937
Other languages
English (en)
French (fr)
Inventor
张峻
郑巨品
胡石锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sanhua Automotive Components Co Ltd
Original Assignee
Zhejiang Sanhua Automotive Components Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sanhua Automotive Components Co Ltd filed Critical Zhejiang Sanhua Automotive Components Co Ltd
Priority to JP2022523887A priority Critical patent/JP7413520B2/ja
Priority to EP21770745.4A priority patent/EP4123179A4/en
Priority to US17/910,595 priority patent/US12289020B2/en
Publication of WO2021185131A1 publication Critical patent/WO2021185131A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—Mechanical details of the pump control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0693—Details or arrangements of the wiring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/40—Structural association with grounding devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
    • H02K2211/03—Machines characterised by circuit boards, e.g. pcb

Definitions

  • This application relates to a fluid pump, in particular to an electric pump.
  • the electric pump includes a stator assembly and an electric control board assembly.
  • the stator assembly and the electric control board assembly are electrically connected, and the circuit board is equipped with electronic components; usually, the external system or the electric pump itself will generate accumulated charges during the use of the electric pump. These accumulated charges may affect the performance and use of electronic components, which in turn may affect the performance of electric pumps.
  • the purpose of the present application is to provide an electric pump, which is beneficial to reduce the influence of accumulated charge on the performance of the electric pump.
  • An electric pump includes a stator assembly and an electric control board assembly, the stator assembly is electrically connected to the electric control board assembly; the electric pump further includes a conductive member, the conductive member can conduct electricity; the stator assembly includes a stator An iron core, and the conductive member is electrically connected to the reference ground layer of the electric control board assembly and the stator iron core.
  • the electric pump further includes a conductive element, which can conduct electricity, and the conductive element is electrically connected to the reference ground layer of the electric control board assembly and the stator iron core; since the stator iron core is connected to the reference ground layer, the stator iron core is connected to the electric A potential difference is formed on the surface of the control board assembly, which facilitates the conduction of the electric charge accumulated on the surface of the electric control board assembly to the stator core, thereby helping to reduce the influence of the accumulated charge on the electric control board assembly, thereby helping to improve the performance of the electric pump.
  • FIG. 1 is a schematic cross-sectional structure diagram of the first embodiment of the electric pump of the present application
  • Fig. 2 is a schematic diagram of a three-dimensional structure of the stator assembly in Fig. 1;
  • Fig. 3 is a schematic diagram of a three-dimensional structure of the stator core in Fig. 2;
  • Fig. 4 is a schematic diagram of an enlarged structure of part A in Fig. 1;
  • Fig. 5 is a schematic front view of the structure of the conductive member in Fig. 1;
  • FIG. 6 is a schematic diagram of a three-dimensional structure of the first conductive part in FIG. 5;
  • FIG. 7 is a schematic diagram of a three-dimensional structure of the second conductive part in FIG. 5;
  • FIG. 8 is a schematic diagram of a front view of the second conductive part in FIG. 7;
  • Fig. 9 is a schematic diagram of a three-dimensional structure of the electric control board assembly in Fig. 1;
  • FIG. 10 is a schematic diagram of a three-dimensional structure of the electric control board assembly, the fixing part and the conductive part assembled together in FIG. 1;
  • FIG. 11 is a schematic diagram of a three-dimensional structure in FIG. 10;
  • FIG. 12 is a schematic diagram of a three-dimensional structure in which the fixing part and the conductive member in FIG. 10 are assembled together;
  • FIG. 13 is a schematic cross-sectional structure diagram of the second embodiment of the electric pump of the present invention.
  • Fig. 14 is a schematic diagram of an enlarged structure of part B in Fig. 13;
  • 15 is a schematic cross-sectional structure diagram of the third embodiment of the electric pump of the present application.
  • Fig. 16 is a schematic diagram of an enlarged structure of part C in Fig. 15;
  • FIG. 17 is a schematic diagram of a three-dimensional structure of the first injection molded part in FIG. 15 in one direction;
  • FIG. 18 is a schematic diagram of a three-dimensional structure of the first injection molded part in FIG. 15 in another direction;
  • Fig. 19 is a schematic front view of the first injection molded part in Fig. 17 or Fig. 18 in one direction;
  • Fig. 20 is a schematic cross-sectional structure view taken along the A-A direction in Fig. 19;
  • FIG. 21 is a schematic front view of the first injection molded part in FIG. 17 or FIG. 18 in another direction;
  • Fig. 22 is a schematic cross-sectional structure view taken along the B-B direction in Fig. 21;
  • FIG. 23 is a schematic diagram of an enlarged structure of part D in FIG. 22;
  • 24 is a schematic cross-sectional structure diagram of the fourth embodiment of the electric pump of the present application.
  • FIG. 25 is a schematic diagram of a three-dimensional structure of the first injection molded part in FIG. 24 in one direction;
  • Fig. 26 is a schematic diagram of a three-dimensional structure of the first injection molded part in Fig. 24 in another direction.
  • the electric pump in the following embodiments can provide flow power for the working medium of the automobile thermal management system.
  • the working medium may include a 50% glycol aqueous solution or clean water.
  • the working medium may also be other substances.
  • the electric pump 100 includes a pump housing, a rotor assembly 1, a stator assembly 2, a pump shaft 3, and an electric control board assembly 4.
  • the rotor assembly 1 is sleeved on the outer circumference of the pump shaft 3;
  • the pump housing includes a first housing 5 and the second housing 6, the first housing 5 and the second housing 6 are relatively fixedly connected.
  • the pump housing can form a pump cavity.
  • the electric pump 100 also includes a partition 7 which separates the pump cavity into The first cavity 80 and the second cavity 90, the first cavity 80 can flow through the working medium, the second cavity 90 does not directly contact the working medium, the rotor assembly 1 is located in the first cavity 80, the stator assembly 2 and the electric control board assembly 4 Located in the second cavity 90; in this embodiment, the connecting portion between the first housing 5 and the isolating portion 7 is provided with a first annular sealing ring 101, and the connecting portion between the second housing 6 and the isolating portion 7 is provided with The second annular sealing ring 102, the structure of the first annular sealing ring 101 can prevent the working medium from seeping out at the connection between the first housing 5 and the isolation part 7, and the structure of the second annular sealing ring 102 can be Prevent the working medium from seeping out at the connection between the second housing 6 and the isolation part 7, and at the same time prevent the external medium from penetrating into the inner cavity of the pump; see Figure 1, the stator assembly 2 is electrically connected to the electric
  • the stator assembly 2 includes a stator core 21, an insulating frame 22, and at least three windings 23.
  • the insulating frame 22 covers at least part of the surface of the stator core 21.
  • the winding 22 is wound around the insulating frame 23.
  • the electric control board assembly 4 in 1 is electrically connected; specifically, in this embodiment, the stator assembly 2 includes six windings 23. Of course, the stator assembly 2 may also include other numbers of windings, such as three or nine or twelve.
  • the stator core 21 includes a core neck portion 211, a core shoe portion 212, and a core yoke portion 213.
  • the core yoke portion 213 is disposed on at least part of the outer circumference of the core neck portion 211, and The core neck portion 211 is connected to the core shoe portion 212 and the core yoke portion 213.
  • the core neck portion 211 provides support for the winding of the winding 23 in FIG.
  • the number of 23 corresponds to the same.
  • FIG. 1 is a schematic diagram of the structure of the first embodiment of the electric pump in this application.
  • the structure of the first embodiment of the electric pump will be described in detail below.
  • the electric pump 100 further includes a conductive member 8, the conductive member 8 can conduct electricity; the conductive member 8 includes a first connection end 81 and a second connection end 82, the first connection end 81 and the electric control board assembly 4
  • the reference stratum is electrically connected
  • the second connection end 82 is electrically connected to the stator core 21
  • the reference stratum of the electric control board assembly 4 is electrically conducted to the stator core 21 through the conductive member 8; since the stator core 21 is electrically connected to the reference stratum, the stator The iron core 21 and the surface of the electric control board assembly 4 can form a potential difference, which is conducive to the conduction of the electric charge accumulated on the surface of the electric control board assembly 4 to the stator iron core 21, thereby helping to reduce the accumulated charge on the electrons in the electric control board assembly 4.
  • the influence of the components is beneficial to reduce the impact of the accumulated charge on the electric pump, and at the same time, it is also beneficial to improve the electromagnetic compatibility of the electric pump;
  • the accumulated charge here includes static electricity and electromagnetic interference generated by the electronic control board assembly itself.
  • two embodiments can be included here. In the first embodiment, at least part of the surface of the stator core 21 and the surface of the electronic control board assembly 4 are located in the same cavity. An air passage is preset between the surface of the stator core 21 and the surface of the electric control board assembly 4.
  • the electric pump can also be provided with a conductive element, which connects the stator core 21 and the surface of the electric control board assembly 4 through the conductive element.
  • the structure of the conductive element can be the same as the structure of the conductive element.
  • the first embodiment described above will be introduced, that is, the surface of the stator core 21 and the surface of the electric control board assembly 4 are located in the second cavity 90.
  • the second connecting end 82 is in contact with the core yoke portion 213.
  • the core yoke portion 213 includes an inner peripheral surface 2131 and an outer peripheral surface 2132, The inner peripheral surface 2131 of the core yoke 213 is closer to the axial center axis of the stator core 21 than the outer peripheral surface 2132; the second connecting end 82 is in contact with the outer peripheral surface 2132 of the core yoke 213.
  • the conductive member 8 includes a first conductive portion 83 and a second conductive portion 84.
  • the first conductive portion 83 and the second conductive portion 84 are arranged separately;
  • the “body arrangement” means that the first conductive portion 83 and the second conductive portion 84 are respectively processed into two independent parts, and then assembled; referring to Figures 6 to 8, in this embodiment, the first connecting end 81 is located at the first The first end of the conductive portion 83 and the second connecting end 82 are located at the first end of the second conductive portion 84, and the second end 832 of the first conductive portion 83 is in contact with the second end 842 of the second conductive portion 84, specifically, In this embodiment, the second end 832 of the first conductive portion 83 is in direct contact with the second end 842 of the second conductive portion 84.
  • the second end 832 of the first conductive portion 83 is in direct contact with the second end 842 of the second conductive portion 84.
  • the terminal can also be indirectly contacted through a conductive adapter; in this embodiment, the conductive member 8 includes a first conductive portion 83 and a second conductive portion 84.
  • the first conductive portion 83 and the second conductive portion 84 are arranged separately.
  • the first conductive portion The first conductive portion 83 and the second conductive portion 84 can also be integrally arranged.
  • the “integrated arrangement” here means that the first conductive portion 83 and the second conductive portion 84 are processed into one component.
  • the conductive member 8 can also only include The second conductive portion 84, that is, the conductive member 8 is composed of one component. Specifically, refer to the second embodiment of the electric pump and the third embodiment of the electric pump in this application; of course, the conductive member is also It can be composed of two or more components.
  • the first conductive portion 83 and the second conductive portion 84 are both elastic Element, defined when the first end of the first conductive portion 83 is electrically connected to the reference ground layer of the electrical control board assembly 4, and the second end 832 of the first conductive portion 83 is in contact with the second end 842 of the second conductive portion 84
  • the height of the conductive portion 83 is the use height, and the use height of the first conductive portion 83 is smaller than the height of the first conductive portion 83 in the natural state; that is, when the second end 832 of the first conductive portion 83 is in contact with the second conductive portion 83
  • the first conductive portion 83 receives the positive pressure of the second conductive portion 84, so that the first conductive portion 83 is compressed, so that the use height of the first conductive portion 83 is smaller than that of the first conductive portion 83
  • this will help to improve the reliability of the contact between the first conductive portion 83 and the reference ground of the electronic control board assembly 4 and the reliability of the contact between the first conductive portion 83 and the second conductive portion 84.
  • This facilitates the conduction of accumulated charges through the first conductive portion 83 and the second conductive portion 84.
  • the portion 84 may have height errors during the manufacturing and assembly process, and the first conductive portion 83 and the second conductive portion 84 are elastic elements, which is also beneficial to adapt to the stator assembly 2 and/or the electronic control board assembly 4 and/or the first
  • the height error of the conductive portion 83 and/or the second conductive portion 84 in the process of manufacturing and assembling is beneficial to improve the reliability of the contact between the conductive member and the stator core 21 and the conductive member and the electric control board assembly 4.
  • the second conductive portion 84 includes an inclined section 843.
  • the inclined section 843 is integrally provided with the second connecting end 82.
  • the second connecting end 82 is vertical, and the second connecting end The end 82 and the inclined section 843 are arranged at an angle.
  • the second connecting end 82 can also be inclined and arranged at an angle to the inclined section 843; or, the second connecting end 82 is used as an extension of the inclined section 843 and is connected to the inclined section 843.
  • the arrangement of the second connecting end 82 here is not limited to the above-mentioned ways; see Figures 1 to 5, the inclined section 843 and the outer peripheral surface 2132 of the iron core yoke 213 of the stator iron core 21 Set at an angle, where the outer peripheral surface 2132 of the iron core yoke portion 213 is the outer peripheral surface of the stator iron core; in this embodiment, the outer surface of the inclined section 843 is in contact with the first casing 5, 843 generates a force.
  • the inclined section 843 is arranged at an angle with the stator core 21, and the inclined section 843 is integrally arranged with the second connecting end 82, the second connecting end 82 is in contact with the outer peripheral surface 2132 of the iron core yoke 213 in FIG. Therefore, the second connecting end 82 is better attached to the outer peripheral surface 2132 of the iron core yoke portion 213 of the stator iron core 21, which is beneficial to improve the reliability of the contact between the second connecting end 82 and the stator iron core 21.
  • stator assembly 2 and the first housing 5 are arranged separately, and the "separate arrangement" here means that the subassembly 2 and the first housing 5 are separately processed into two Separate parts and then assemble; of course, the stator assembly 2 and the first housing 5 can also be connected by injection molding to form a whole. Specifically, it can include the following two ways.
  • the first way at least the stator assembly 2 is embedded
  • the first housing 5 is formed by injection molding. At this time, at least part of the outer peripheral surface 2132 of the iron core yoke portion 213 of the stator iron core 21 can be exposed.
  • the stator core 21, the conductive member 8 and the reference ground layer of the electric control board assembly 4 can form a conductive path, which is beneficial to reduce the accumulation of charges on the electronic components in the electric control board assembly 4.
  • the influence of the device is beneficial to reduce the impact of accumulated charge on the performance of the electric pump.
  • the second method is: first the stator iron The core 21 and the second connecting end 82 of the conductive element 8 are fixedly connected or arranged in a limited position.
  • the fixing method of the stator core 21 and the second connecting end 82 of the conductive element 8 can be other fixing methods such as bonding, clamping, etc.
  • the stator assembly 2 and at least part of the conductive element 8 are used as inserts to form the first housing 5; in addition, in this embodiment, the pump shaft 3 is used as an insert to form the isolation portion 7 and the isolation portion 7 and the first shell
  • the body 5 is arranged separately.
  • the isolating portion 7 can also be integrally arranged with the stator assembly 2, or the isolating portion 7, the stator assembly 2 and the first housing 5 can also be integrally arranged.
  • the electronic control board assembly 4 includes a substrate 41 and electronic components 42 arranged on the substrate 41; the substrate 41 includes a first surface 411 and a second surface 412, the first surface 411 is more than the second surface 412 Close to the stator assembly 2 in FIG. 1; the electric control board assembly 4 also includes an abutting portion 43, which is disposed on the first surface 411, and the abutting portion 43 is electrically connected to the reference ground of the electric control board assembly 4, FIG.
  • the first connecting end 81 is arranged in contact with the abutting portion 43 and is electrically connected to the abutting portion 43; in this embodiment, a conductive layer is formed on the surface of the abutting portion 43, wherein the conductive layer may be a tin-plated layer, a chemical Nickel plating and gold immersion treatments are beneficial to improve the conductivity between the abutting portion 43 and the first connecting end 81 in FIG. Fixed connection.
  • the abutting portion 43 can be a conductive metal sheet or other conductive structure; referring to FIGS.
  • the first end of the first conductive portion 83 is the first connection
  • the end 81, the first connecting end 81 and the abutting portion 43 are welded
  • the second end 832 of the first conductive portion 83 is a cantilever end
  • the second end 832 of the first conductive portion 83 abuts the second conductive portion 84.
  • the electric pump 100 further includes a limiting portion 9, which is located between the electronic control board assembly 4 and the stator core 21, and the first connecting end 81 is located on a side of the limiting portion 9. Side, the second connecting end 82 is located on the other side of the limiting portion 9; the limiting portion 9 includes a first limiting slot 91, the first limiting slot 91 extends along the axial direction of the limiting portion 9, the first limiting The slot 91 is arranged closer to the edge of the limiting portion 9 relative to the center of the limiting portion 9; referring to FIG. 11, the first limiting slot 91 includes a large slot portion 911 and a notched portion 912.
  • the conductive member 8 further includes a first limiting section 844, a bending section 845, and a second limiting section 846.
  • a limit section 844, a bending section 845, and a second limit section 846 are integrated.
  • the bending section 845 connects the first limit section 844 and the second limit section 846.
  • the second limit section 846 is larger than the first limit section 846.
  • the section 844 is closer to the inclined section 843.
  • the first limiting section 844, the bending section 845, and the second limiting section 846 are formed on the second conductive portion 84.
  • first limiting section 844, the bending section 846 are located between the first end of the second conductive portion 84 and the second end 842 of the second conductive portion 84.
  • the first limiting section 844 at least partially extends into the large slot 911, the width of the first limiting section 844 is greater than the width of the notch 912, the first limiting section 844 is tightly fitted with the large groove 911, and at least a part of the bending section 845 is located in the notch 912;
  • the two conductive portions 84 are restricted in the radial direction and the axial direction, thereby helping to prevent the second conductive portion 84 from moving in the radial direction and the axial direction; referring to FIG. 11, the restricting portion 9 further includes a second restricting groove 92 ,
  • the second limiting slot 92 extends along the axial direction of the limiting portion 9. In this embodiment, the second limiting slot 92 is closer to the stator core 21 in FIG.
  • the positioning slot 92 is located closer to the edge of the limiting portion 9 relative to the center of the limiting portion 9; in conjunction with FIG. 12, the second limiting section 846 is at least partially located in the second limiting slot 92, which is beneficial to increase the second conductive portion 84 and The axial support area between the limiting members 9 is further beneficial to prevent the second conductive portion 84 from shaking.
  • the limiting portion 9 further includes at least two positioning pillars 93, which are arranged protrudingly from the surface of the limiting portion 9 toward the direction of the electronic control board assembly 4 in Figure 1, in conjunction with Figure 10,
  • the positioning posts 93 are arranged correspondingly to the through holes in the electric control board assembly 4, so that the electric control board assembly 4 can be positioned and installed; in this embodiment, the limit posts 93 include three positioning posts 93, which are along the The circumferential direction of the limiting portion 9 is unevenly distributed, so that the electronic control board assembly 4 has a unique installation direction during installation, which is beneficial to prevent wrong installation.
  • the limiting portion 9 and the first housing 5 are provided separately. Of course, the limiting portion 9 and the first housing 5 can also be integrally provided.
  • FIGS. 13 and 14 are schematic structural diagrams of the second embodiment of the electric pump in this application.
  • the structure of the second embodiment of the electric pump will be described in detail below.
  • the electric pump 100' includes a conductive member 8'.
  • the first connecting end 81' of the conductive member 8' is electrically connected to the reference ground of the electric control board assembly 4, and the conductive member 8'
  • the second connecting end 82' is in contact with the inner peripheral surface 2121 of the iron core shoe 212 in FIGS. 2 and 3, where the inner peripheral surface 2121 of the iron core shoe 212 is the inner peripheral surface of the stator core 21;
  • the reference layer of the iron core 21, the conductive member 8'and the electric control board assembly 4 can form a conductive path for accumulating electric charge.
  • stator iron core 21 Since the stator iron core 21 is connected to the reference ground of the electric control board assembly 4 through the conductive member 8', the stator iron core 21 It forms a potential difference with the surface of the electric control board assembly 4, which is beneficial for the electric charge accumulated on the surface of the electric control board assembly 4 to be conducted to the stator core 21, thereby helping to reduce the influence of the accumulated charges on the electronic components in the electric control board assembly 4. , Which is beneficial to reduce the impact of accumulated charge on the electric pump, and at the same time, it is also beneficial to improve the electromagnetic compatibility of the electric pump; the accumulated charge here includes static electricity and electromagnetic interference generated by the electronic control board assembly 4 itself; see Figure 14, this
  • the conductive member 8' is an integral piece.
  • the conductive member 8' may also be composed of two parts or more than two parts. Specifically, reference may be made to the first embodiment of the electric pump. I won't repeat them here.
  • the conductive member 8' is an elastic element
  • the conductive member 8' includes an inclined section 843'
  • the front part of the inclined section 843' is connected to the second connecting end 82'
  • the inclined section 843' is integrated with the second connecting end 82'
  • the second connecting end 82' is vertical
  • the second connecting end 82' is arranged at an angle to the inclined section 843'.
  • the second connecting end 82' can also be inclined and is inclined to The section '843 is arranged at an angle; or, the second connecting end 82' is used as an extension of the inclined section 843' and is arranged in parallel with the inclined section 843.
  • the arrangement of the second connecting end 82' here is not limited to the above-mentioned ways;
  • the inclined section 843' is located between the first connecting end 81' and the second connecting end 82'.
  • the inclined section 843' is closer to the second connecting end 82' than the first connecting end 81'.
  • the inclined section 843' is connected to the stator core 21
  • the inner peripheral surface 2121 of the core shoe portion 212 is set at an angle.
  • the outer surface of the inclined section 843' is in contact with the isolating portion 7, so that the isolating portion 7 can exert a force on the outer surface of the inclined section 843' Since the inclined section 843' is arranged at an angle with the inner peripheral surface 2121 of the iron core shoe portion 212 of the stator core 21, the second connecting end 82' is in contact with the end surface of the iron core shoe portion, thereby facilitating the improvement of the second connecting end 82 'Reliability of contact with the inner peripheral surface 2121 of the core shoe portion 212 of the stator core 21.
  • the second connecting end 82' of the conductive member 8' is in contact with the inner peripheral surface 2121 of the core shoe 212 in FIGS. 2 and 3, and the conductive member 8'is an integral piece; other structural features in this embodiment can refer to the first embodiment of the electric pump, which will not be repeated here.
  • FIG. 15 is a schematic diagram of the structure of the third embodiment of the electric pump in this application.
  • the structure of the third embodiment of the electric pump will be described in detail below.
  • the electric pump 100" includes a conductive element 8".
  • the first connecting end 81" of the conductive element 8" is electrically connected to the reference ground of the electric control board assembly 4.
  • the second connecting end 82" of 8" is in contact with the inner peripheral surface 2131 of the iron core yoke 213 in FIG.
  • stator core 21, the conductive member 8" and the reference ground of the electronic control board assembly 4 can form a conductive path for accumulating charges, thereby facilitating the conduction of the accumulated charges to the stator core 21; since the stator core is connected to the reference ground, The stator iron core and the surface of the electric control board assembly form a potential difference, which is conducive to the conduction of the charges accumulated on the surface of the electric control board assembly to the stator iron core, thereby helping to reduce the influence of the accumulated charges on the electronic components in the electric control board assembly 4.
  • the conductive member 8" is an integral piece.
  • the conductive member 8" can also be composed of two parts or more than two parts. Specifically, please refer to the first implementation of the electric pump Ways, I won’t repeat them here.
  • the stator assembly 2 in FIG. 2 is used as an insert to form the first injection molded part 10.
  • the shaft 3 is the first injection molded part 10 formed by insert injection molding.
  • the "injection molding” here can be one injection, two injections or more than two injections; see Figures 15 to 20, the first injection molded part 10 includes The first shell 5", the isolation portion 7" and the limiting portion 9", that is to say, the first shell 5", the isolation portion 7" and the limiting portion 9" are integrally arranged, so that only a set of molds is required, This helps to save costs.
  • the first injection molded part 10 includes a hole 13 extending along the axial direction of the first injection molded part 10, and the cavity of the hole 13 communicates with the second cavity 90 in FIG. 15; In the circumferential direction of the stator assembly 2, at least one hole 13 is provided between two adjacent windings 23; because the plastic of the first injection molded part 10 is Some parts may be thermally expanded and contracted under the influence of temperature, and the plastic part that undergoes thermal expansion and contraction may squeeze the enameled wire in the winding 23, which may cause the insulating paint layer of the enameled wire in the winding 23 to be squeezed from each other.
  • the hole 23 can reserve a certain space when the plastic part expands and contracts with heat, so that the plastic part of the first injection molded part 10 can deform toward the cavity of the hole 23 , which in turn helps to reduce the extrusion force of the plastic part of the first injection molded part 10 on the winding 23, which is beneficial to prevent the insulating paint layer of the enameled wire in the winding from being damaged due to the extrusion force of the plastic part of the first injection molded part 10. .
  • a hole 13 is provided between two adjacent windings 23, and the hole 13 is evenly distributed along the circumferential direction of the stator assembly; of course, two adjacent windings 23 Two or more holes 13 may also be provided between the windings 23.
  • the hole 13 is a blind hole.
  • the hole 13 includes an opening 130 facing away from the impeller 12 in FIG. 15; along the axial direction of the electric pump 100", the bottom wall 134 of the hole 13 is larger than the stator core 21 15 is closer to the upper end surface 210 of the impeller 12, the opening 130 of the hole 13 is closer to the electric control board assembly 4 in Fig.
  • the depth is greater than the axial height of the stator core 21, which is conducive to relatively reducing the thickness of the bottom wall 134 of the hole 13 so that the wall thickness of the hole 13 at the bottom wall 134 is the same as that of the hole 13 at each peripheral side wall of the hole.
  • the wall thickness at the position is relatively uniform, which is beneficial to prevent the formation of pores in the first injection molded part; “relatively uniform” here refers to the wall thickness of the hole 13 at the bottom wall 134 and the hole 13 at each circumference of the hole
  • the wall thicknesses at the side walls are equal or the absolute value of the difference between the wall thicknesses is less than or equal to 2 mm.
  • the first injection molded part 10 is cross-sectioned along the direction perpendicular to the central axis of the stator assembly 2.
  • one of the core necks is defined as the first core neck 2111
  • the other core neck is defined as the second core neck 2112.
  • the peripheral side wall of the hole 13 includes the first core neck 2112.
  • the first side wall 131 overlaps a part of the inner peripheral surface 2131 of the core yoke portion 213, that is, a part of the inner peripheral surface of the core yoke portion 213 2131 constitutes the first side wall 131, the second side wall 132 is closer to the first core neck portion 2111 than the third side wall 133, and the second side wall 132 and the first core neck portion 2111 are closest to the second side wall 132
  • the side walls 2113 of the third side wall 133 are parallel to the side wall 2114 closest to the third side wall 133 in the second core neck portion 2112;
  • There is a processing error and all the parallelism within the processing error range is within the scope of the protection of this application; in addition, in this embodiment, there is provided between the first iron core neck 2111 and the second iron core neck 2112 A hole 13, the first iron core neck 2111 and the second iron core neck 2112 are symmetrically distributed with respect to the center plane of the hole.
  • the first end of the first side wall 131 is connected to the first end of the second side wall 132, and the second end of the first side wall 131 is connected to the first end of the third side wall 133.
  • the second end of the second side wall 132 is connected to the second end of the third side wall 122.
  • the "connection" here can be a direct connection or an indirect connection.
  • the first A side wall 131, a second side wall 132, and a third side wall 133 are indirectly connected to each other to form a closed pattern; of course, the first side wall 131, the second side wall 132, and the third side wall 133 are also mutually connected It can be directly connected.
  • the connection between the two can be smoothly connected by a circular arc, thereby forming a cross-section similar to Triangular hole.
  • the hole 13 is provided between the outer peripheral surface 2132 of the core yoke portion 213 and the outer peripheral surface 2122 of the core shoe portion 212, so that The hole 13 is arranged relatively close to the winding 23; specifically, there are three cases here.
  • the first case is: referring to Figures 22 and 23, the core yoke 213 is located between two adjacent core necks 211 In the inner peripheral surface 2131, a part of the inner peripheral surface 2131 has no injection layer, and the inner peripheral surface of the core yoke without injection layer constitutes the first side wall 131, that is, the first side wall 131 has no injection layer, and the first side wall 131 has no injection layer.
  • the stator core at one side wall 131 is exposed.
  • the second side wall 132 and the third side wall 122 are both injection molded layers. At this time, in the process of forming the first injection molded part by injection molding, the first side wall 131 can be used on the one hand.
  • the mold can contact the first side wall 131 through the protruding hole; And is in contact with the first side wall 131, that is, the second connecting end 82" of the conductive member 8" is in contact with the inner peripheral surface 2131 of the core yoke portion 213, so that the reference ground layer of the electric control board assembly 4 passes through the conductive member 8" can conduct electrical conduction with the stator iron core;
  • the second case is: the first side wall 131, the second side wall 132, and the third side wall 133 are all injection molded layers, at this time the outer peripheral surface 2132 of the core yoke 213 At least partly there is no injection layer, so when the stator assembly is used as an insert injection molding to form an injection part, the outer peripheral surface 2132 of the core yoke 213 without injection layer can be used as the positioning reference surface of the mold;
  • the third case is: first The side walls 131, the second side walls 132, and the third side walls 133 are all injection molded layers.
  • the inner peripheral surface of the core shoe without the injection layer can be used as the positioning reference surface of the mold. Specifically, refer to the fourth embodiment of the electric pump below.
  • the stator assembly 2 and the pump shaft 3 are used as inserts to form a first injection molded part 10, and the first injection molded part 10 includes a hole 13 and a hole 13 It is a blind hole.
  • the first injection part 10 in this embodiment includes a first housing 5", an isolation portion 7" and a limiting portion 9", that is to say, the first The housing 5", the isolation portion 7" and the limiting portion 9" are integrally arranged, so that only a set of molds are required, which is beneficial to relatively saving costs.
  • the first embodiment of the electric pump please refer to the first embodiment of the electric pump. , I won’t repeat them here.
  • FIG. 24 is a schematic diagram of the structure of the fourth embodiment of the electric pump in this application.
  • the structure of the fourth embodiment of the electric pump will be described in detail below.
  • the stator assembly 2 is used as an insert to form the first injection molded part 10'.
  • injection molding can be one injection, two injections, or more than two injections.
  • the first injection molded part 10' is formed with a first shell 5"' and a limiting portion 9"', that is to say, the first shell 5"' and a limiting portion
  • the part 9"' is integrally arranged.
  • the isolating part 7"' is arranged separately.
  • the "split arrangement" here refers to a single component processed separately.
  • the hole 13' extends along the axial direction of the first injection molded part 10', and the hole 13' is a through hole; the hole 13' includes a first opening 135' and a second opening 135'.
  • the stator assembly 2 is used as an insert to form a first injection molded part 10', and the first injection molded part 10' includes a hole 13' and a hole 13' It is a through hole.
  • the electric pump in this embodiment is easier to assemble.

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Abstract

一种电动泵（100），包括定子组件（2）、电控板组件（4）和能够导电的传导件（8）；定子组件（2）和电控板组件（4）电连接；定子组件（2）包括定子铁芯（21），传导件（8）电连接电控板组件（4）的参考地层与定子铁芯（21）；这样有利于减小积累电荷对电控板组件（4）的影响，提高了电动泵（100）的性能。

Description

电动泵
本申请要求于2020年03月16日提交中国专利局、申请号为202010181934.5、发明名称为“电动泵”，以及于2020年12月03日提交中国专利局、申请号为202011410931.0、发明名称为“电动泵”的两件中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种流体泵，具体涉及一种电动泵。
背景技术
电动泵包括定子组件和电控板组件，定子组件和电控板组件电连接，电路板上设置有电子元器件；通常，电动泵在使用过程中，外部系统或者电动泵本身会产生积累电荷，这些积累电荷可能会影响电子元器件的性能和使用，进而可能影响电动泵的性能。
发明内容
本申请的目的在于提供一种电动泵，有利于减小积累电荷对电动泵性能的影响。
为实现上述目的，本申请的一种实施方式采用如下技术方案：
一种电动泵，包括定子组件和电控板组件，所述定子组件与所述电控板组件电连接；所述电动泵还包括传导件，所述传导件能够导电；所述定 子组件包括定子铁芯，所述传导件电连接所述电控板组件的参考地层与所述定子铁芯。
本申请提供的技术方案中，电动泵还包括传导件，传导件能够导电，传导件电连接电控板组件的参考地层与定子铁芯；由于定子铁芯与参考地层连接，定子铁芯与电控板组件的表面形成电势差，这样有利于电控板组件表面积累的电荷传导至定子铁芯，从而有利于减小积累电荷对电控板组件的影响，进而有利于提高电动泵的性能。
附图说明
图1是本申请电动泵的第一种实施方式的一种剖面结构示意图；
图2是图1中定子组件的一种立体结构示意图；
图3是图2中定子铁芯的一种立体结构示意图；
图4是图1中A部的一种放大结构示意图；
图5是图1中传导件的一个正视结构示意图；
图6是图5中第一导电部的一种立体结构示意图；
图7是图5中第二导电部的一种立体结构示意图；
图8是图7中第二导电部的一种正视结构示意图；
图9是图1中电控板组件的一种立体结构示意图；
图10是图1中电控板组件、固定部以及传导件组装在一起的一种立体结构示意图；
图11是图10中的一种立体结构示意图；
图12是图10中固定部以及传导件组装在一起的一种立体结构示意图；
图13是本发明电动泵的第二种实施方式的一种剖面结构示意图；
图14是图13中B部的一种放大结构示意图；
图15是本申请电动泵的第三种实施方式的一种剖面结构示意图；
图16是图15中C部的一种放大结构示意图；
图17是图15中第一注塑件在一个方向上的一种立体结构示意图；
图18是图15中第一注塑件在另一个方向上的一种立体结构示意图；
图19是图17或图18中第一注塑件的在一个方向上的一种正视结构示意图；
图20是图19中沿着A-A方向剖面的一种剖面结构示意图；
图21是图17或图18中第一注塑件的在另一个方向上的一种正视结构示意图；
图22是图21中沿着B-B方向剖面的一种剖面结构示意图；
图23是图22中D部的一种放大结构示意图；
图24是本申请电动泵的第四种实施方式的一种剖面结构示意图；
图25是图24中第一注塑件在一个方向上的一种立体结构示意图；
图26是图24中第一注塑件在另一个方向上的一种立体结构示意图。
具体实施方式
下面结合附图和具体实施例对本发明作进一步说明：
以下实施例中的电动泵能够为汽车热管理系统的工作介质提供流动动力，工作介质可以为包括50％乙二醇水溶液或者清水，当然工作介质也可以为其他的物质。
参见图1，电动泵100包括泵壳体、转子组件1、定子组件2、泵轴3以及电控板组件4，转子组件1套设于泵轴3的外周；泵壳体包括第一壳体5和第二壳体6，第一壳体5和第二壳体6相对固定连接，泵壳体能够形成泵内腔，电动泵100还包括隔离部7，隔离部7将泵内腔分隔为第一腔80和第二腔90，第一腔80能够有工作介质流过，第二腔90与工作介质不直接接触，转子组件1位于第一腔80，定子组件2和电控板组件4位于第二腔90；本实施例中，第一壳体5和隔离部7之间的连接部分设置有第一环形密封圈101，第二壳体6和隔离部7之间的连接部分设置有第二环形密封圈102，设置的第一环形密封圈101的结构可以阻止工作介质在第一壳体5和隔离部7之间的连接处渗出，设置的第二环形密封圈102的结构可以阻止工作介质在第二壳体6和隔离部7之间的连接处渗出，同时可以阻止外界介质渗入泵内腔；参见图1，定子组件2与电控板组件4电连接，转子组件1包括永磁体11和叶轮组件12，电动泵100工作时，电控板组件5控制通过定子组件2的电流进而控制定子组件2产生的激励磁场，转子组件1在激励磁场的作用下围绕泵轴3转动。
参见图2，定子组件2包括定子铁芯21、绝缘架22和至少三个绕组23，绝缘架22包覆于定子铁芯21的至少部分表面，绕组22缠绕于绝缘架23，绕组23与图1中的电控板组件4电连接；具体地，本实施例中，定子 组件2包括六个绕组23，当然，定子组件2也可以包括其他数量的绕组，譬如三个或九个或十二个等其他数量；参见图3，定子铁芯21包括铁芯颈部211、铁芯靴部212和铁芯轭部213，铁芯轭部213设置于铁芯颈部211的至少部分外周，铁芯颈部211连接铁芯靴部212和铁芯轭部213，铁芯颈部211为图2中绕组23的缠绕提供支撑，本实施例中，铁芯颈部211的数量与图2中绕组23的数量对应相同。
参见图1，图1是本申请中电动泵的第一种实施方式的结构示意图，以下将对电动泵的第一种实施方式的结构进行详细介绍。
参见图1至图5，电动泵100还包括传导件8，传导件8能够导电；传导件8包括第一连接端81和第二连接端82，第一连接端81与电控板组件4的参考地层电连接，第二连接端82与定子铁芯21电连接，电控板组件4的参考地层通过传导件8与定子铁芯21电传导；由于定子铁芯21与参考地层电连接，定子铁芯21与电控板组件4的表面能够形成电势差，这样有利于电控板组件4表面积累的电荷传导至定子铁芯21，从而有利于减小积累电荷对电控板组件4中的电子元器件的影响，进而有利于减小积累电荷对电动泵的影响，同时还有利于提高电动泵的电磁兼容性；此处的积累电荷包括静电以及电控板组件本身产生的电磁干扰。为了进一步保证积累电荷能够传导至定子铁芯21，这里可以包括两种实施方式，第一种实施方式中，至少部分定子铁芯21的表面与电控板组件4的表面位于同一个腔内，定子铁芯21的表面与电控板组件4的表面之间预设有空气通道。第二种实施方式中，电动泵还可以设置导电件，通过导电件连接定子铁芯21与电控板组件4的表面，导电件的结构可以和传导件的结构相同。以下以上述第 一种实施方式进行介绍，即定子铁芯21的表面与电控板组件4的表面位于第二腔90。
参见图1至图5，本实施例中，第二连接端82与铁芯轭部213接触，具体地，参见图1和图3，铁芯轭部213包括内周面2131和外周面2132，铁芯轭部213的内周面2131比外周面2132更靠近定子铁芯21的轴向中心轴线；第二连接端82与铁芯轭部213的外周面2132接触。
参见图1、图5至图8，本实施例中，传导件8包括第一导电部83和第二导电部84，第一导电部83和第二导电部84分体设置；这里的“分体设置”是指第一导电部83和第二导电部84分别加工成独立的两个零部件，然后进行组装；参见图6至图8，本实施例中，第一连接端81位于第一导电部83的第一端，第二连接端82位于第二导电部84的第一端，第一导电部83的第二端832与第二导电部84的第二端842接触，具体地，本实施例中，第一导电部83的第二端832与第二导电部84的第二端842直接接触，当然，第一导电部83的第二端832与第二导电部84的第二端也可以通过导电转接件间接接触；本实施例中，传导件8包括第一导电部83和第二导电部84，第一导电部83和第二导电部84分体设置，当然，第一导电部83和第二导电部84也可以是一体设置，这里的“一体设置”是指第一导电部83和第二导电部84加工成一个零部件，当然，传导件8也可以只包括第二导电部84，也就是说，传导件8由一个零部件组成，具体地，可参考本申请中电动泵的第二种实施方式和电动泵的第三种实施方式；当然，传导件也可以是由两个或者两个以上的零部件组成。
参见图1、图5至图8，至少第一导电部83和第二导电部84之一为弹 性元件，具体地，本实施例中，第一导电部83和第二导电部84均为弹性元件，定义当第一导电部83的第一端与电控板组件4的参考地层电连接、第一导电部83的第二端832与第二导电部84的第二端842接触时第一导电部83的高度为使用高度，第一导电部83的使用高度小于第一导电部83在自然状态下的高度；也就是说，当第一导电部83的第二端832与第二导电部84的第二端842接触时，第一导电部83受到第二导电部84的正压力，从而使得第一导电部83被压缩，进而使得第一导电部83的使用高度小于第一导电部83在自然状态下的高度，这样一方面有利于提高第一导电部83与电控板组件4的参考地层接触的可靠性以及第一导电部83与第二导电部84接触的可靠性，从而有利于使得积累电荷能够通过第一导电部83和第二导电部84进行传导，另一方面，由于定子组件2和/或电控板组件4和/或第一导电部83和/或第二导电部84在加工制造以及装配过程中可能存在高度误差，而第一导电部83和第二导电部84均为弹性元件还有利于适应定子组件2和/或电控板组件4和/或第一导电部83和/或第二导电部84在加工制造以及装配过程中的高度误差，进而有利于提高传导件与定子铁芯21以及传导件与电控板组件4接触的可靠性。
参见图1、图4至图8，第二导电部84包括倾斜段843，倾斜段843与第二连接端82一体设置，本实施例中，第二连接端82呈竖直状，第二连接端82与倾斜段843呈角度设置，当然，第二连接端82也可以呈倾斜状，并与倾斜段843呈角度设置；或者，第二连接端82作为倾斜段843的延长段并与倾斜段843平行设置或重合设置；这里关于第二连接端82的设置不仅仅局限于上述几种方式；参见图1至图5，倾斜段843与定子 铁芯21的铁芯轭部213的外周面2132呈角度设置，这里铁芯轭部213的外周面2132即为定子铁芯的外周面；本实施例中，倾斜段843的外侧面与第一壳体5接触，第一壳体5对倾斜段843产生作用力，由于倾斜段843与定子铁芯21呈角度设置，且倾斜段843与第二连接端82一体设置，第二连接端82与图3中铁芯轭部213的外周面2132接触，从而使得第二连接端82更好地贴合于定子铁芯21的铁芯轭部213的外周面2132，进而有利于提高第二连接端82与定子铁芯21接触的可靠性。
另外，参见图1至图3，本实施例中，定子组件2与第一壳体5分体设置，这里的“分体设置”是指定子组件2和第一壳体5分别加工成两个单独的零部件，然后进行组装；当然，定子组件2和第一壳体5也可以通过注塑连接形成一体，具体地，可以包括以下两种方式，第一种方式：至少以定子组件2为嵌件注塑形成第一壳体5，此时可以将定子铁芯21的铁芯轭部213的至少部分外周面2132裸露，裸露的铁芯轭部213的外周面可以用于与图5中传导件8的第二连接端82接触，从而使得定子铁芯21、传导件8以及电控板组件4的参考地层能够形成导电通路，从而有利于减小积累电荷对电控板组件4中的电子元器件的影响，进而有利于减小积累电荷对电动泵性能的影响，另一方面，对于电磁干扰所产生的电荷，有利于提高电动泵的电磁兼容性；第二种方式是：先将定子铁芯21与传导件8的第二连接端82固定连接或限位设置，这里定子铁芯21与传导件8的第二连接端82的固定方式可以是粘接、卡接等其他的固定方式，然后再以定子组件2和至少部分传导件8为嵌件注塑形成第一壳体5；另外，本实施例中，以泵轴3为嵌件注塑形成隔离部7，隔离部7与第一壳体5分体设 置，当然，隔离部7也可以与定子组件2一体设置，或者隔离部7、定子组件2以及第一壳体5也可以一体设置，具体地，可参考下文中电动泵的第三种实施方式的详细介绍，在此就不一一赘述了。
参见图9和图10，电控板组件4包括基板41和设置在基板41上的电子元器件42；基板41包括第一面411和第二面412，第一面411比第二面412更靠近图1中的定子组件2；电控板组件4还包括抵接部43，抵接部43设置于第一面411，抵接部43与电控板组件4的参考地层电连接，图5中的第一连接端81与抵接部43接触设置并与抵接部43电连接；本实施例中，抵接部43的表面成形有导电层，其中，导电层可以为镀锡层、化学镀镍和浸金等处理，这样有利于提高抵接部43与图6中第一连接端81之间的导电性，当然抵接部43也可以加工成一个单独的零部件，再与基板41固定连接，此时抵接部43可以为导电金属片等其他能够导电的结构；参见图6、图9和图10，本实施例中，第一导电部83的第一端即为第一连接端81，第一连接端81与抵接部43焊接，第一导电部83的第二端832为悬臂端，第一导电部83的第二端832与第二导电部84抵接。
参见图1、图10至图12，电动泵100还包括限位部9，限位部9位于电控板组件4和定子铁芯21之间，第一连接端81位于限位部9的一侧，第二连接端82位于限位部9的另一侧；限位部9包括第一限位槽91，第一限位槽91沿着限位部9的轴向延伸，第一限位槽91相对限位部9的中心更靠近限位部9的边缘设置；参见图11，第一限位槽91包括大槽部911和缺口部912，大槽部911和缺口部912连通，大槽部911的宽度大于缺口部912的宽度；参见图5、图7、图8和图12，传导件8还包括第一限 位段844、弯折段845以及第二限位段846，第一限位段844、弯折段845以及第二限位段846一体设置，弯折段845连接第一限位段844和第二限位段846，第二限位段846比第一限位段844更靠近倾斜段843，本实施例中，第一限位段844、弯折段845以及第二限位段846成形于第二导电部84，具体地，第一限位段844、弯折段845和第二限位段846位于第二导电部84的第一端和第二导电部84的第二端842之间，结合图12，第一限位段844至少部分伸入大槽部911，第一限位段844的宽度大于缺口部912的宽度，第一限位段844与大槽部911紧配，至少部分弯折段845位于缺口部912；通过以上方式有利于使得第二导电部84在径向上和轴向上得到限位，从而有利于防止第二导电部84在径向上和轴向上发生移动；参见图11，限位部9还包括第二限位槽92，第二限位槽92沿着限位部9的轴向延伸，本实施例中，第二限位槽92比第一限位槽91更靠近图1中的定子铁芯21，第二限位槽92相对限位部9的中心更靠近限位部9的边缘设置；结合图12，第二限位段846至少部分位于第二限位槽92，这样有利于增加第二导电部84与限位件9之间的轴向支撑面积，进而有利于防止第二导电部84晃动。
参见图11和图12，限位部9还包括至少两个定位柱93，定位柱93自限位部9的表面朝向图1中的电控板组件4的方向凸起设置，结合图10，定位柱93与电控板组件4中的通孔对应设置，从而使得电控板组件4能够定位安装；本实施例中，限位柱93包括三个定位柱93，三个定位柱93沿着限位部9的圆周方向非均匀分布，这样使得电控板组件4在安装时具有唯一的安装方向，从而有利于防止错装。另外，本实施例中，限位部9与 第一壳体5分体设置，当然，限位部9与第一壳体5也可以一体设置，具体结构可参考电动泵的第四种实施方式和电动泵的第五种实施方式，在此就不一一赘述了。
参见图13至图14，图13和图14是本申请中电动泵的第二种实施方式的结构示意图，以下将对电动泵的第二种实施方式的结构进行详细介绍。
参见图13和图14，电动泵100’包括传导件8’，本实施例中，传导件8’的第一连接端81’与电控板组件4的参考地层电连接，传导件8’的第二连接端82’与图2和图3中铁芯靴部212的内周面2121接触，这里铁芯靴部212的内周面2121即为定子铁芯21的内周面；这样使得定子铁芯21、传导件8’以及电控板组件4的参考地层能够形成积累电荷的导电通路，由于定子铁芯21通过传导件8’与电控板组件4的参考地层连接，定子铁芯21与电控板组件4的表面形成电势差，这样有利于电控板组件4表面积累的电荷传导至定子铁芯21，从而有利于减小积累电荷对电控板组件4中的电子元器件的影响，进而有利于减小积累电荷对电动泵的影响，同时还有利于提高电动泵的电磁兼容性；此处的积累电荷包括静电以及电控板组件4本身产生的电磁干扰；参见图14，本实施例中，传导件8’为一个整体件，当然，传导件8’也可以包括由两个零部件或者两个以上的零部件组成，具体地，可以参考电动泵的第一种实施方式，在此就不一一赘述了。
参见图14，传导件8’为弹性元件，传导件8’包括倾斜段843’，倾斜段843’的前部与第二连接端82’连接，倾斜段843’与第二连接端82’一体设置，本实施例中，第二连接端82’呈竖直状，第二连接端82’与倾斜段843’呈角度设置，当然，第二连接端82’也可以呈倾斜状，并与倾斜段’843呈角度 设置；或者，第二连接端82’作为倾斜段843’的延长段并与倾斜段843平行设置，这里关于第二连接端82’的设置不仅仅局限于上述几种方式；倾斜段843’位于第一连接端81’和第二连接端82’之间，倾斜段843’比第一连接端81’更靠近第二连接端82’，倾斜段843’与定子铁芯21的铁芯靴部212的内周面2121呈角度设置，本实施例中，倾斜段843’的外侧面与隔离部7接触，这样使得隔离部7能够对倾斜段843’的外侧面产生作用力，由于倾斜段843’与定子铁芯21的铁芯靴部212的内周面2121呈角度设置，第二连接端82’与铁芯靴部的端面接触，从而有利于提高第二连接端82’与定子铁芯21的铁芯靴部212的内周面2121接触的可靠性。
与电动泵的第一种实施方式相比，本实施例中，传导件8’的第二连接端82’与图2和图3中铁芯靴部212的内周面2121接触，且传导件8’为一整体件；本实施例中的其他结构特征可参考电动泵的第一种实施方式，在此就不一一赘述了。
参见图15，图15是本申请中电动泵的第三种实施方式的结构示意图，以下将对电动泵的第三种实施方式的结构进行详细介绍。参见图15、图16和图22，电动泵100”包括传导件8”，本实施例中，传导件8”的第一连接端81”与电控板组件4的参考地层电连接，传导件8”的第二连接端82”与图3中铁芯轭部213的内周面2131接触，传导件8”的第二连接端82”位于相邻的两个铁芯颈部211之间；这样使得定子铁芯21、传导件8”以及电控板组件4的参考地层能够形成积累电荷的导电通路，从而有利于将积累电荷传导至定子铁芯21；由于定子铁芯与参考地层连接，定子铁芯与电控板组件的表面形成电势差，这样有利于电控板组件表面积累的电荷传导至 定子铁芯，从而有利于减小积累电荷对电控板组件4中的电子元器件的影响，进而有利于减小积累电荷对电动泵的影响，同时还有利于提高电动泵的电磁兼容性；此处的积累电荷包括静电以及电控板组件本身产生的电磁干扰；参见图15和图16，本实施例中，传导件8”为一整体件，当然，传导件8”也可以包括由两个零部件或者两个以上的零部件组成，具体地，可以参考电动泵的第一种实施方式，在此就不一一赘述了。
参见图15至图20，本实施例中，至少以图2中的定子组件2为嵌件注塑形成第一注塑件10，具体地，本实施例中，以图2中的定子组件2和泵轴3为嵌件注塑成形第一注塑件10，这里的“注塑成形”可以是一次注塑，也可以是两次注塑或者两次以上的注塑；参见图15至图20，第一注塑件10包括第一壳体5”、隔离部7”以及限位部9”，也就是说第一壳体5”、隔离部7”以及限位部9”一体设置，这样只需要一套模具即可，从而有利于节省成本。
参见图18至图22，第一注塑件10包括孔部13，孔部13沿着第一注塑件10的轴向延伸，孔部13的腔体与图15中的第二腔90连通；沿着定子组件2的圆周方向，相邻的两个绕组23之间设置有至少一个上述孔部13；由于在注塑过程和/或注塑后和/或使用过程中中，第一注塑件10的塑料部分可能会受温度影响发生热胀冷缩，而发生热胀冷缩的塑料部分可能会挤压绕组23中的漆包线，进而有可能使得绕组23中漆包线的绝缘漆层由于受到相互之间的挤压力而受到损坏，而通过设置孔部23能够给塑料部分发生热胀冷缩时预留一定的空间，从而有利于使得第一注塑件10的塑料部分能够朝向孔部23的腔体发生形变，进而有利于减小第一注塑件10的 塑料部分对绕组23的挤压力，这样有利于防止绕组中漆包线的绝缘漆层由于受到第一注塑件10的塑料部分的挤压力而受到损坏。
参见图18、图19和图22，本实施例中，相邻的两个绕组23之间设置有一个孔部13，孔部13沿着定子组件的圆周方向均匀分布；当然，相邻的两个绕组23之间也可以设置两个或者多个孔部13。
参见图20和图22，沿着第一注塑件10的轴向方向，孔部13的轴向深度与绕组23的轴向长度至少部分重合；具体地，参见图18至图22，本实施例中，孔部13为盲孔，孔部13包括一个开口130，开口130背向图15中的叶轮12；沿着电动泵100”的轴向，孔部13的底壁134比定子铁芯21的上端面210更靠近图15中的叶轮12，孔部13的开口130比定子铁芯21的下端面214更靠近图15中的电控板组件4，也就是说，孔部13的轴向深度大于定子铁芯21的轴向高度，这样有利于相对减小孔部13底壁134的厚度，进而使得孔部13在底壁134处的壁厚与孔部13在孔部各周侧壁处的壁厚相对均匀，进而有利于防止第一注塑件在注塑过程中形成气孔；这里的“相对均匀”是指孔部13在底壁134处的壁厚与孔部13在孔部各周侧壁处的壁厚相等或者壁厚相差值的绝对值小于等于2mm。
参见图21至图23，沿着垂直于定子组件2中心轴线的方向对第一注塑件10做截面，在第一注塑件10的截面中，针对其中一个孔部13以及与孔部13相邻的两个铁芯颈部211，定义其中一个铁芯颈部为第一铁芯颈部2111，定义另外一个铁芯颈部为第二铁芯颈部2112，孔部13的周侧壁包括第一侧壁131、第二侧壁132和第三侧壁133，第一侧壁131与铁芯轭部213的部分内周面2131重合，也就是说，铁芯轭部213的部分内周面2131 构成第一侧壁131，第二侧壁132比第三侧壁133更靠近第一铁芯颈部2111，第二侧壁132与第一铁芯颈部2111中距离第二侧壁132最近的侧壁2113平行，第三侧壁133与第二铁芯颈部2112中距离第三侧壁133最近的侧壁2114平行；这里的“平行”为理论平行，而实际在加工过程中可能会存在加工误差，所有在加工误差范围内的平行度均在本申请所保护的范围内；另外，本实施例中，在第一铁芯颈部2111和第二铁芯颈部2112之间设置有一个孔部13，第一铁芯颈部2111和第二铁芯颈部2112关于孔部的中心面对称分布。
参见图23，本实施例中，第一侧壁131的第一端与第二侧壁132的第一端连接，第一侧壁131的第二端与第三侧壁133的第一端连接，第二侧壁132的第二端与第三侧壁122的第二端连接，这里的“连接”可以是直接连接，也可以是间接连接，具体地，参见图，本实施例中，第一侧壁131、第二侧壁132以及第三侧壁133相互之间间接连接从而围成封闭图形；当然，第一侧壁131、第二侧壁132以及第三侧壁133相互之间也可以直接连接，当第一侧壁131、第二侧壁132以及第三侧壁133相互之间直接连接时，两者之间的连接处可通过圆弧平滑过渡连接，从而形成横截面为类三角形的孔部。
参见图22和图23，本实施例中，沿着定子组件2的径向，孔部13设置于铁芯轭部213的外周面2132和铁芯靴部212的外周面2122之间，这样使得孔部13相对靠近绕组23设置；具体地，这里有三种情况，第一种情况是：参见图22和图23，在位于相邻的两个铁芯颈部211之间的铁芯轭部213的内周面2131中，有部分内周面2131无注塑层，无注塑层的铁 芯轭部的内周面构成第一侧壁131，也就是说，第一侧壁131无注塑层，第一侧壁131处的定子铁芯的裸露，第二侧壁132以及第三侧壁122均为注塑层，此时在注塑形成第一注塑件的过程中，一方面可以以第一侧壁131为模具的定位基准面，这样模具可以通过伸入孔部与第一侧壁131接触；另一方面，结合图15和图16，传导件8”的第二连接端82’伸入孔部13并与第一侧壁131接触，也就是说，传导件8”的第二连接端82”与铁芯轭部213的内周面2131接触，这样使得电控板组件4的参考地层通过传导件8”与定子铁芯能够进行电传导；第二种情况是：第一侧壁131、第二侧壁132、第三侧壁133均为注塑层，此时铁芯轭部213的外周面2132至少部分无注塑层，这样当以定子组件为嵌件注塑形成注塑件时，可以以铁芯轭部213的无注塑层的外周面2132作为模具的定位基准面；第三种情况是：第一侧壁131、第二侧壁132、第三侧壁133均为注塑层，此时铁芯靴部的至少部分内周面无注塑层，这样当以定子组件为嵌件注塑形成注塑件时，可以以铁芯靴部的无注塑层的内周面作为模具的定位基准面，具体地，可参见下文中电动泵的第四种实施方式。
与电动泵的第一种实施方式相比，本实施方式中，以定子组件2和泵轴3为嵌件注塑形成第一注塑件10，且第一注塑件10包括孔部13，孔部13为盲孔，相较于电动泵的第一种实施方式，本实施方式中的第一注塑件10包括第一壳体5”、隔离部7”以及限位部9”，也就是说第一壳体5”、隔离部7”以及限位部9”一体设置，这样只需要一套模具即可，有利于相对节省成本，本实施方式中的其他结构可参考电动泵的第一种实施方式，在此就不一一赘述了。
参见图24，图24是本申请中电动泵的第四种实施方式的结构示意图，以下将对电动泵的第四种实施方式的结构进行详细介绍。
参见图24至图26，本实施例中，以定子组件2为嵌件注塑成形第一注塑件10’，这里的“注塑成形”可以是一次注塑，也可以是两次注塑或者两次以上的注塑；参见图25至图26，本实施例中，第一注塑件10’成形有第一壳体5”’和限位部9”’，也就是说第一壳体5”’和限位部9”’一体设置，另外，本实施例中，隔离部7”’分体设置，这里的“分体设置”是指单独加工呈一个零部件。
参见图24至图26，本实施例中，孔部13’沿着第一注塑件10’的轴向延伸，孔部13’为通孔；孔部13’包括第一开口135’和第二开口136’，第一开口135’朝向叶轮，第二开口136’背向叶轮，第一开口135’比第二开口136’更靠近隔离部7’，第一开口135’位于第一壳体5’上端面51’的下方，这样有利于防止第一开口135’对第一壳体5’和隔离部7’的连接造成干涉；另外，参见图13，本实施例中，第一开口135’位于绕组顶部注塑层231’的下方。
与电动泵的第一种实施方式相比，本实施方式中，以定子组件2为嵌件注塑形成第一注塑件10’，且第一注塑件10’包括孔部13’，孔部13’为通孔，相较于电动泵的第一种实施方式，本实施方式中的电动泵便于组装，本实施方式中的其他结构可参考电动泵的第一种实施方式和第四种实施方式，在此就不一一赘述了。
需要说明的是：以上实施例仅用于说明本申请而并非限制本申请所描述的技术方案，尽管本说明书参照上述的实施例对本申请已进行了详细的说明，但是，本领域的普通技术人员应当理解，所属技术领域的技术人员 仍然可以对本申请进行修改或者等同替换，而一切不脱离本申请的精神和范围的技术方案及其改进，均应涵盖在本申请的权利要求范围内。

Claims (11)

  1. 一种电动泵，包括定子组件和电控板组件，所述定子组件与所述电控板组件电连接；其特征在于：所述电动泵还包括传导件，所述传导件能够导电；所述定子组件包括定子铁芯，所述传导件电连接所述电控板组件的参考地层与所述定子铁芯。
  2. 根据权利要求1所述的电动泵，其特征在于：所述传导件包括第一连接端和第二连接端，所述第一连接端与所述电控板组件的参考地层连接，所述第二连接端与所述定子铁芯抵接。
  3. 根据权利要求2所述的电动泵，其特征在于：至少部分所述定子铁芯的表面与所述电控板组件的表面位于同一个腔内，至少部分所述定子铁芯的表面与所述电控板组件的表面之间预设有空气通道。
  4. 根据权利要求2所述的电动泵，其特征在于：所述电动泵还包括导电件，所述导电件电连接所述定子铁芯与所述电控板组件的表面。
  5. 根据权利要求3或4所述的电动泵，其特征在于：所述电控板组件包括基板和设置在所述基板上的电子元器件；所述基板包括第一面和第二面，所述第一面比所述第二面更靠近所述定子组件；所述电控板组件还包括抵接部，所述抵接部位于所述第一面，所述抵接部与所述电控板组件的参考地层电连接，所述第一连接端与所述抵接部接触设置并与所述抵接部电连接。
  6. 根据权利要求5所述的电动泵，其特征在于：所述传导件为弹性元 件，所述传导件包括倾斜段，所述倾斜段的前部与所述第二连接端连接，所述倾斜段与所述第二连接端一体设置，所述倾斜段比所述第一连接端更靠近所述第二连接端；所述电动泵包括第一壳体，至少部分所述第一壳体位于所述定子组件的外周，至少部分所述倾斜段位于所述第一壳体和所述定子铁芯的外周面之间，所述倾斜段与所述定子铁芯的外周面呈角度设置，所述第二连接端与所述定子铁芯外周面抵接。
  7. 根据权利要求5所述的电动泵，其特征在于：所述传导件为弹性元件，所述传导件包括倾斜段，所述倾斜段的前部与所述第二连接端连接，所述倾斜段与所述第二连接端一体设置，所述倾斜段比所述第一连接端更靠近所述第二连接端；所述电动泵包括隔离部，至少部分所述隔离部位于所述定子组件的内周，至少部分所述倾斜段位于所述隔离部和所述定子铁芯的内周面之间，所述倾斜段与所述定子铁芯的内周面呈角度设置，所述第二连接端与所述定子铁芯的内周面抵接。
  8. 根据权利要求5所述的电动泵，其特征在于：至少以所述定子组件为嵌件注塑形成第一注塑件，所述第一注塑件包括注塑部，所述注塑部包覆于所述定子组件的部分外表面；所述注塑部包括孔部，所述孔部沿着所述第一注塑件的轴向延伸，所述孔部的至少一个开口朝向所述电控板组件；沿着所述定子组件的圆周方向，相邻的两个所述绕组之间设置有至少一个所述孔部，所述铁芯轭部的内周面构成所述孔部的第一侧壁，所述第二连接端伸入所述孔部的腔体并所述第一侧壁接触。
  9. 根据权利要求6至8任一项所述的电动泵，其特征在于：所述传导 件包括第一导电部和第二导电部，所述第一导电部和所述第二导电部分体设置；所述第一连接端成形于所述第一导电部的第一端，所述第二连接端成形于所述第二导电部的第一端，所述第一导电部的第二端与所述第二导电部的第二端接触。
  10. 根据权利要求9所述的电动泵，其特征在于：至少所述第一导电部和所述第二导电部之一为弹性元件，所述第二导电部包括所述倾斜段；定义当所述第一导电部的第一端与所述电控板组件的参考地层电连接、所述第一导电部的第二端与所述第二导电部的第二端接触时所述第一导电部的长度为使用高度，所述第一导电部的使用高度小于所述第一导电部在自然状态下的高度。
  11. 根据权利要求10所述的电动泵，其特征在于：所述电动泵包括限位部，所述限位部位于所述电控板组件和所述定子铁芯之间；所述限位部包括第一限位槽，所述第一限位槽沿着所述限位部的轴向延伸，所述第一限位槽包括大槽部和缺口部，所述大槽部和所述缺口部连通，所述大槽部的宽度大于所述缺口部的宽度；所述传导件还包括第一限位段和弯折段，所述第一限位段和所述弯折段连接并一体设置，所述第一限位段和所述弯折段位于所述第一连接端和所述第二连接端之间，所述第一限位段比所述弯折段更靠近所述第一连接端，所述第一限位段至少部分伸入所述大槽部，所述第一限位段的宽度大于所述缺口部的宽度，至少部分所述弯折段位于所述缺口部。
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