WO2022016781A1 - 电子水泵和车辆 - Google Patents

电子水泵和车辆 Download PDF

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Publication number
WO2022016781A1
WO2022016781A1 PCT/CN2020/135040 CN2020135040W WO2022016781A1 WO 2022016781 A1 WO2022016781 A1 WO 2022016781A1 CN 2020135040 W CN2020135040 W CN 2020135040W WO 2022016781 A1 WO2022016781 A1 WO 2022016781A1
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WO
WIPO (PCT)
Prior art keywords
accommodating cavity
stator
water pump
electronic water
control board
Prior art date
Application number
PCT/CN2020/135040
Other languages
English (en)
French (fr)
Inventor
葛笑
孙国庆
孙田田
付威
刘琳
赵中森
徐浩扬
Original Assignee
安徽威灵汽车部件有限公司
广东威灵汽车部件有限公司
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 安徽威灵汽车部件有限公司, 广东威灵汽车部件有限公司 filed Critical 安徽威灵汽车部件有限公司
Publication of WO2022016781A1 publication Critical patent/WO2022016781A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • 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
    • 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
    • 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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • Embodiments of the present application relate to the technical field of electronic water pumps, and in particular, to an electronic water pump and a vehicle having the electronic water pump.
  • the shell strength of the electronic water pump is not high and the service life is short, which affects the performance of the electronic water pump, and because the volume of the stator assembly is relatively large, the volume of the electronic water pump is large, which is not conducive to the miniaturization and wide application of the electronic water pump.
  • the material cost of the electronic water pump in the related art is high, and therefore, there is a need for improvement.
  • the present application aims to solve one of the technical problems in the related art at least to a certain extent.
  • an embodiment of an aspect of the present application proposes an electronic water pump, which has a long service life, high performance, small size and low cost.
  • An embodiment of another aspect of the present application provides a vehicle having the electronic water pump.
  • An electronic water pump includes: a housing having a first accommodating cavity, a second accommodating cavity and a third accommodating cavity therein, the first accommodating cavity surrounding the second accommodating cavity On the outer side of the accommodating cavity, the second accommodating cavity and the third accommodating cavity are arranged at intervals in the axial direction of the housing, the second accommodating cavity opens towards a direction away from the third accommodating cavity, the The third accommodating cavity is opened in a direction away from the second accommodating cavity, the housing includes a top wall, a bottom wall, an outer peripheral wall and an inner peripheral wall, the top wall, the bottom wall, the outer peripheral wall and the The inner peripheral wall encloses the first accommodating cavity, the inner peripheral wall and the bottom wall enclose the second accommodating cavity, and the bottom wall and the outer peripheral wall enclose the third accommodating cavity; an end cover, The end cover is arranged at one end of the housing to close the third accommodating cavity; the stator assembly and the stator injection molding body are arranged in the first accommodating cavity, The stator injection molding body is formed by one injection
  • the stator injection molding body is formed by one injection to at least partially cover the stator assembly
  • the casing is formed by secondary injection molding to cover the stator injection molding body
  • the case has a first accommodating body for accommodating at least part of the stator assembly.
  • the cavity, the second accommodating cavity for accommodating the rotor assembly, and the third accommodating cavity spaced apart from the first and second accommodating cavities through the bottom wall can ensure the strength of the casing injection body by using the above-mentioned two injection molding methods.
  • stator injection body can be smaller, the injection molding time can be shortened, and the winding and other components inside the stator injection body can be prevented from being damaged during injection molding, thereby ensuring the performance reliability of the electronic water pump. Long service life , high performance, small size and low cost.
  • the bottom wall surface of the third accommodating cavity includes a first portion opposite to the first accommodating cavity in the axial direction of the casing and a first portion opposite to the second accommodating cavity in the casing
  • the axially opposite second part, the bottom wall is provided with an annular groove, the annular groove is recessed from the bottom wall surface of the third accommodating cavity toward the first accommodating cavity, and at least part of the annular groove is located in the first accommodating cavity. the first part.
  • the bottom wall includes a peripheral wall surface surrounding the annular groove
  • the peripheral wall surface includes a first wall surface and a second wall surface arranged at intervals
  • the first wall surface and the second wall surface are both and the projection of the first wall surface is located in the projection of the second wall surface on the projection plane orthogonal to the axial direction of the casing, the first wall surface is located in the first part, the The second wall surface is located on the first part or the second part.
  • the stator injection molded body is provided with a positioning hole at its first end in the axial direction, and the positioning hole extends from the first end of the stator injection molded body to the second end of the stator injection molded body , the positioning hole includes a first section and a second section arranged in sequence along its extending direction, the cross-sectional area of the first section gradually decreases along the extending direction of the positioning hole, and the cross-sectional area of the second section is The area is unchanged along the extending direction of the positioning hole;
  • the top wall is provided with a fitting portion, the top wall includes a first side surface adjacent to the bottom wall, and the fitting portion faces the bottom from the first side surface
  • the wall is protruding, and the fitting portion includes a first fitting portion and a second fitting portion arranged in sequence along its protruding direction, the first fitting portion is fitted in the first segment, and the second fitting portion is fitted in the In the second section, the cross-sectional area of the first matching portion gradually decreases along the protruding direction of the
  • the first segment is a conical hole
  • the second segment is a circular hole
  • the outer peripheral contour of the cross-section of the first matching portion and the outer peripheral contour of the cross-section of the second matching portion are both is circular.
  • the inner peripheral surface of the stator injection molding body is provided with a first groove extending along the axial direction of the stator injection molding body, and the outer peripheral surface of the inner peripheral wall is provided with a first groove extending along the axial direction of the housing. an extended protrusion that fits within the first groove.
  • the plurality of the first grooves are arranged at intervals along the circumferential direction of the injection molded body of the stator, the protrusions are a plurality, and the protrusions are a plurality of spaced along the circumference of the housing.
  • the stator assembly includes: a stator core; an insulating frame provided at an end portion of the stator core in the axial direction; a plurality of pins, the plurality of pins being spaced apart Arrangement, one end of at least some of the plurality of pins is connected to the insulating frame; windings, the windings are wound around the teeth of the stator core, and the lead wires of the windings are connected to the pins connected, the stator injection body covers one end of the pin, the winding, the insulating frame and the stator iron core; a fixing plate, the fixing plate is arranged on the insulating frame away from the stator iron On one side of the core, a part of the fixing plate is located in the casing, the other part of the fixing plate is located in the stator injection molding body, and the other ends of the plurality of pins pass through the stator injection molding body, the stator injection molding body, and the stator injection molding body.
  • the fixing plate and the bottom wall are connected with the control board
  • the fixing plate has a plurality of through holes penetrating the fixing plate along its thickness direction, and the plurality of through holes include a first through hole, a second through hole, a third through hole and a fourth through hole through holes, the plurality of pins include a first electrical connector, a second electrical connector, a third electrical connector and a grounding component, the first electrical connector passes through the fixing through the first through hole
  • the second electrical connection piece passes through the fixing board through the second through hole
  • the third electrical connection piece passes through the fixing board through the third through hole
  • the ground piece passes through the fixed board.
  • the fourth through hole passes through the fixing plate.
  • control board has a grounding portion, the grounding portion is in contact with the end cover, the end cover is a conductor, the outer peripheral surface of the stator core is provided with a mounting portion, and the grounding member The first end in the extending direction is connected to the mounting portion, the second end of the grounding member in the extending direction is connected to the control board, and the second end of the grounding member is spaced from the grounding portion arranged and connected through circuits on the control board.
  • the grounding member includes a first segment and a second segment arranged in sequence along the extending direction thereof, the first segment is connected to the mounting portion, and the second segment is connected to the grounding portion, The cross-sectional area of the second segment is smaller than the cross-sectional area of the first segment.
  • the end face of the second segment remote from the first segment is spaced from a side of the control board adjacent the end cap.
  • the grounding portion is provided with an elastic sheet that is a conductor, and the grounding portion abuts the end cap through the elastic sheet.
  • the electronic water pump further includes an overmolded body, the overmolded body is wrapped around the periphery of a part of the pin, the overmolded body and the bottom wall are far from the stator assembly
  • the sides of the casing are connected, and the overmolding body and the control board are spaced apart in the axial direction of the casing, and the casing and the overmolding body are integrally formed by injection molding.
  • the distance between the end surface of the control board adjacent to the bottom wall and the side surface of the bottom wall adjacent to the control board is A
  • the other end of the pin is connected to the control board by soldering.
  • the boards are connected, and the solder protrudes from the end surface of the control board adjacent to the bottom wall by a distance B, and the distance between the other end of the pin and the side surface of the bottom wall adjacent to the control board
  • the distance is H
  • the dimension of the overmolded body in the axial direction of the housing is h, and satisfies:
  • W is the end deflection of the other end of the pin
  • P is the load on the end of the other end of the pin
  • E is the elastic modulus
  • I is the moment of inertia of the section.
  • the bottom wall is provided with a mounting hole
  • the mounting hole extends from the bottom wall of the second accommodating cavity toward the third accommodating cavity
  • the electronic water pump further includes a shaft base
  • the At least part of the shaft base is arranged in the mounting hole, and the outer peripheral contour of the cross section of the shaft base is non-circular
  • the shaft base has a first hole facing the second accommodating cavity
  • the rotating shaft is located in the One end in the axial direction passes through the rotor assembly and fits into the first hole to be connected with the shaft base
  • the shaft base and the housing are integrally formed by injection molding.
  • a vehicle according to an embodiment of the second aspect of the present application includes the electronic water pump described in any one of the embodiments of the present application.
  • the electronic water pump of the vehicle has good performance and high structural strength.
  • FIG. 1 is a schematic structural diagram of an electronic water pump according to an embodiment of the present application.
  • FIG. 2 is a schematic view of the housing of FIG. 1 .
  • FIG. 3 is another schematic view of the housing of FIG. 1 .
  • FIG. 4 is a schematic view of the axle base in FIG. 3 .
  • FIG. 5 is another schematic view of the axle base in FIG. 3 .
  • FIG. 6 is an enlarged schematic view of part A in FIG. 3 .
  • FIG. 7 is another schematic structural diagram of an electronic water pump according to an embodiment of the present application.
  • FIG. 8 is a partial schematic view of the stator assembly of FIG. 7 .
  • FIG. 9 is a schematic diagram of the grounding member in FIG. 7 .
  • FIG. 10 is a schematic diagram of the pin of FIG. 7 .
  • FIG. 11 is a schematic view of the end cap of FIG. 1 .
  • FIG. 12 is a schematic diagram of the stator assembly of the embodiment of the present application.
  • FIG. 13 is another schematic diagram of the stator assembly of the embodiment of the present application.
  • FIG. 14 is a schematic view of the fixing plate in FIG. 12 .
  • FIG. 15 is a schematic view of the fixing plate in FIG. 13 .
  • FIG. 16 is another schematic diagram of the stator assembly of the embodiment of the present application.
  • FIG. 17 is yet another schematic view of the housing of FIG. 1 .
  • FIG. 18 is a top view of the housing of FIG. 17 .
  • FIG. 19 is a schematic view of the overmolded body in FIG. 1 .
  • FIG. 20 is an enlarged schematic view of part C in FIG. 19 .
  • FIG. 21 is a schematic view of the overmolded body in FIG. 20 .
  • FIG. 22 is another schematic view of the overmolded body of FIG. 20 .
  • FIG. 23 is a cross-sectional view of the overmolded body of FIG. 19 .
  • FIG. 24 is a schematic diagram of a clamping member of an electronic water pump according to an embodiment of the present application.
  • FIG. 25 is yet another schematic view of the housing of FIG. 3 .
  • FIG. 26 is yet another schematic view of the housing of FIG. 3 .
  • FIG. 27 is an enlarged schematic view of part B in FIG. 26 .
  • FIG. 28 is another schematic view of the housing of FIG. 26 .
  • FIG. 29 is an enlarged schematic view of part D in FIG. 28 .
  • first accommodating cavity 101 second accommodating cavity 102, third accommodating cavity 103, bottom wall 104, first part 1041, second part 1042, annular groove 1043, top wall 105, matching part 1051, first Matching portion 1052, second matching portion 1053, inner peripheral wall 106, protrusion 1061, outer peripheral wall 107, first hole 11, shaft base 12, first shaft hole 13, convex portion 14, base 15, boss 16,
  • end cap 20 fourth accommodating cavity 201, boss 21, flange 22, lug 221,
  • the stator assembly 30 the stator injection body 31, the positioning hole 311, the first section 3111, the second section 3112, the first groove 312, the stator core 32, the insulating frame 33, the pins 34, the first electrical connector 341, the first The second electrical connector 342, the third electrical connector 343, the grounding component 344, the first section 3441, the second section 3442, the main body 3401, the first part 3402, the first extension part 3403, the second extension part 3404, the second part 3405, winding 35, fixing plate 36, first through hole 361, second through hole 362, third through hole 363, fourth through hole 364,
  • the electronic water pump includes a housing 10 , an end cover 20 , a stator assembly 30 , a stator injection molded body 31 , a rotor assembly (not shown), a rotating shaft 50 and a control board 60 .
  • the housing 10 has a first accommodating cavity 101 , a second accommodating cavity 102 and a third accommodating cavity 103 , the first accommodating cavity 101 surrounds the outside of the second accommodating cavity 102 , and the second accommodating cavity 102 and the third accommodating cavity 103 are The housing 10 is arranged at intervals in the axial direction (up and down direction in FIG. 3 ).
  • the second accommodating cavity 102 is located at the center of the housing 10 , and the second accommodating cavity 102 extends in the up-down direction. 101 extends in the same direction as the second accommodating cavity 102 , and the second accommodating cavity 102 is spaced apart from the first accommodating cavity 101 in the radial direction of the housing 10 .
  • the third accommodating cavity 103 is formed below the second accommodating cavity 102 at intervals.
  • the housing 10 includes a top wall 105 , a bottom wall 104 , an outer peripheral wall 107 and an inner peripheral wall 106 , the top wall 105 , the bottom wall 104 , the outer peripheral wall 107 and the inner peripheral wall 106 enclose a first accommodation cavity 101 , the inner peripheral wall 106 and the bottom wall 104
  • the second accommodating cavity 102 is enclosed, and the third accommodating cavity 103 is enclosed by the bottom wall 104 and the peripheral wall 107 .
  • the bottom wall 104 is spaced apart from the first accommodating cavity 101 and the third accommodating cavity 103 in the up-down direction, and the bottom wall 104 is spaced apart from the second accommodating cavity 102 and the third accommodating cavity 103 in the up-down direction. .
  • the end cover 20 is provided at one end of the casing 10 (as shown in the lower end of the casing 10 in FIG. 7 ) to close the third accommodating cavity 103 .
  • the end cover 20 has a fourth accommodating cavity 201 that opens toward the housing 10 (upward in FIG. 7 ), and the fourth accommodating cavity 201 communicates with the third accommodating cavity 103 .
  • the stator injection molded body 31 is in the first accommodating cavity 101 , and the stator injection molded body 31 covers a part of the stator assembly 30 , that is, a part of the stator assembly 30 and the stator injection molded body 31 are set in the first accommodating cavity 101 .
  • the stator injection molding body 31 is formed by one injection to cover a part of the stator assembly 30
  • the casing 10 is formed by secondary injection molding to cover the stator injection molding body 31 .
  • the electronic water pump includes two injection processes, wherein the first injection process is to form the stator injection body 31 to cover a part of the stator assembly 30 , and the second injection process is to form the casing 10 to cover the stator injection body 31 .
  • the rotor assembly is arranged in the second accommodating cavity 102 , and one end of the shaft 50 in the axial direction (the lower end of the shaft 50 in FIG. 3 ) is connected to the bottom wall 104 through the rotor assembly.
  • the control board 60 is located in the third accommodating cavity 103 or the end cover 20 , and another part of the stator assembly 30 penetrates through the bottom wall 104 to be connected with the control board 60 .
  • the control board 60 is arranged in the fourth accommodating cavity 201 , and another part of the stator assembly 20 passes through the first accommodating cavity 101 through the third accommodating cavity 103 and extends into the fourth accommodating cavity 104 to be connected with the control board 60 .
  • the electronic water pump according to the embodiment of the present application includes two injection processes, the stator injection body is formed by one injection to at least partially cover the stator assembly, the casing is formed by secondary injection to cover the stator injection body, and the casing has a structure for accommodating at least part of the stator.
  • the first accommodating cavity of the assembly, the second accommodating cavity accommodating the rotor assembly, and the third accommodating cavity separated from the first and second accommodating The strength of the shell injection body can also save material costs, and the volume of the stator injection body can be smaller, and the injection molding time can be shortened. During injection molding, it can avoid damage to the windings and other components inside the stator injection body, thereby ensuring the performance of the electronic water pump. Reliability Long service life, high performance, small size and low cost.
  • the sides of the bottom wall 104 facing away from the first accommodating cavity 101 and the second accommodating cavity 102 form the bottom wall surface of the third accommodating cavity 103 , and the third accommodating cavity
  • the bottom wall surface of 103 includes a first part 1041 and a second part 1042, wherein the first part 1041 is opposite to the first accommodating cavity 101 in the axial direction of the housing 10 (up and down direction in FIG. 1 ), and the second part 1042 is opposite to The second accommodating cavity 102 is opposite to each other in the axial direction of the housing 10 .
  • the bottom wall 104 is provided with an annular groove 1043 , the annular groove 1043 is recessed from the bottom wall surface of the third accommodating cavity 103 toward the first accommodating cavity 101 , and at least part of the annular groove 1043 is located at the first portion 1041 .
  • the bottom wall 104 is provided with an annular groove 1043.
  • the annular groove 1043 may be integrally provided in the first portion 1041, or may be partially provided in the first portion 1041, and the other portion may be provided in the first portion 1041.
  • Inside the second part 1042 Therefore, it can be ensured that there is a throttling gap between the annular groove 1043 and the lower side surface of the first accommodating cavity 101 , so as to adjust the flow rate of materials flowing into the outer periphery of the first accommodating cavity 101 .
  • An annular groove 1043 is formed on the first portion 1041 and is recessed upward, and there is a gap between the bottom wall of the annular groove 1043 and the lower side surface of the first accommodating cavity 101 .
  • the pouring port can be reasonably set according to the setting position of the annular groove 1043, so that when the filling material flows to the outer circumference of the first accommodating cavity 101, the filling material is suitable for flowing through the bottom wall of the annular groove 1043. the gap with the lower side of the first accommodating cavity 101 .
  • the sprue is provided in the second part 1042 and located at the center of the second part 1042 .
  • the air gap of the motor is small, and the motor efficiency is high.
  • the gap between the accommodating cavities is small.
  • the gap has a large resistance to the flow of the material in it, which leads to the problem that the material is easily insufficiently filled.
  • the flow velocity in the gap between them is small, and the filling time is long, and the material is easy to collect in the gap and form a weld line, resulting in a decrease in the strength of the shell.
  • the annular groove is provided on the bottom wall, and the bottom wall is located in the annular groove.
  • the wall thickness of the cavity is reduced, and the gap at the corresponding position during the injection molding process is small, which increases the material flow resistance to throttle the filling material flowing to the outer periphery of the first accommodating cavity, so that the filling material is preferentially filled in the first accommodating cavity.
  • the bottom wall 104 includes a peripheral wall surface surrounding the annular groove 1043 , and the peripheral wall surface includes first wall surfaces (the inner wall surface of the annular groove 1043 shown in FIG. 3 ) and spaced apart in the radial direction of the housing 10 , and The second wall surface (the outer wall surface of the annular groove 1043 shown in FIG. 3 ), the first wall surface and the second wall surface are both annular surfaces.
  • the second wall surface is located at the first part 1041
  • the first wall surface is located at the first part 1041 or the second part 1042 . As shown in FIG. 3 and FIG.
  • the outer wall surface of the annular groove 1043 is located at the first part 1041
  • the inner wall surface of the annular groove 1043 may be located at the first part 1041 (as shown in FIG. 3 )
  • the inner wall surface of the annular groove 1043 may also be located at the first part 1041 (as shown in FIG. 3 ).
  • the second portion 1042 (shown in Figure 25).
  • the annular space between the first wall surface and the second wall surface is the annular groove 1043.
  • the entire annular groove is located in the first part, and the second wall surface is located in the first part.
  • a part of the annular groove 1043 is located at the first part, and the other part of the annular groove is located at the second part. Therefore, under this technical solution, it can be ensured that at least part of the annular groove is located in the first part, so that a throttle gap exists between the annular groove and the lower side surface of the first accommodating cavity.
  • the wall thickness of the top wall 105 is d1
  • the wall thickness of the inner peripheral wall 106 is d2
  • the wall thickness of the outer peripheral wall 107 is d3, and d2 ⁇ d1, d2 ⁇ d3.
  • the inner peripheral wall 106 is thinner, so that the motor efficiency can be improved
  • the top wall 105 and the outer peripheral wall 107 are thicker, so that the structural strength of the housing 10 can be improved.
  • the distance between the bottom surface of the annular groove 1043 and the bottom wall surface of the first accommodating cavity 101 in the up-down direction of the housing 10 is d4, and d4 ⁇ d2. It can be understood that, in the process of forming the inner peripheral wall 106 and the outer peripheral wall 107 , a part of the material injected from the gate flows between the first accommodating cavity 101 and the second accommodating cavity 102 to form the inner peripheral wall 106 , and the other part of the material flows Pass through the gap between the bottom surface of the annular groove 1043 and the bottom wall surface of the first accommodating cavity 101 to flow toward the outer periphery of the first accommodating cavity 101 and form the outer peripheral wall 107 .
  • the gap resistance between the bottom surface of the annular groove and the bottom wall surface of the first accommodating cavity can be greater than the gap resistance between the first accommodating cavity and the second accommodating cavity, so that the material preferentially moves toward the first accommodating cavity.
  • the gap between the first accommodating cavity and the second accommodating cavity flows to form an inner peripheral wall that can completely fill the gap, and the material can flow through the gap relatively quickly, so that the materials will not converge in the gap, thereby avoiding welding
  • the head is formed on the inner peripheral wall.
  • the distance between the bottom surface of the annular groove 1043 and the bottom wall surface of the first accommodating cavity 101 in the longitudinal direction of the casing 10 is d4, and 0.6 ⁇ d4/d2 ⁇ 0.1.
  • this technical solution by setting 0.6 ⁇ d4/d2 ⁇ 0.1, the material flow tendency can be adjusted to preferentially form the inner peripheral wall, and the strength of the shell can be ensured.
  • the filling material is suitable for flowing into the outer circumference of the first accommodation cavity through the gap between the annular groove and the lower side surface of the first accommodation cavity to form the outer peripheral wall.
  • the size relationship between d4 and d3 will affect the formation of the outer peripheral wall. , the inventor found that when d4/d3 is less than 0.2, the relative resistance of the annular groove is too large, the filling material for forming the outer peripheral wall is insufficient, and the wall thickness of the casing at the annular groove is thin, and the strength of the casing is low.
  • the inventor also found that when d4/d1 is too small, the filling material preferentially flows to the top of the first accommodating cavity through the gap between the first accommodating cavity and the second accommodating cavity, and the filling speed of the material to form the top wall is faster than that of the outer peripheral wall. At a high speed, the material will eventually collect on the outer periphery of the first accommodating cavity, resulting in the formation of weld lines on the outer peripheral wall, affecting the appearance of the casing.
  • the filling material preferentially flows to the top of the first receiving cavity through the outer circumference of the first receiving cavity, and the speed of filling the material to form the top wall is greater than the speed of forming the inner peripheral wall, and the material will eventually flow. It will gather between the first accommodating cavity and the second accommodating cavity, resulting in the formation of weld lines on the inner peripheral wall and affecting the structural strength of the inner peripheral wall.
  • the material flow trend can be adjusted to preferentially form the inner peripheral wall, and the weld line can be formed on the top wall without affecting the appearance of the shell.
  • d4 cannot be too small, and d4 is too small.
  • the blocking effect is good, the filling of the peripheral wall is too slow, and finally the weld line is formed on the peripheral wall, which affects the appearance and strength of the shell.
  • the blocking effect is not obvious enough, the outer peripheral wall is filled quickly, the inner peripheral wall is filled slowly, and it is easy to form weld marks at the inner peripheral wall, and even the filling is not satisfied.
  • annular groove 1043 of the present application is not limited to the form in which the annular groove 1043 is at least partially located in the first part 1041 , for example, in other embodiments, the annular groove 1043 is located in the second part 1042 .
  • the annular groove 1043 is provided on the second portion 1042 of the bottom wall 104 and is disposed adjacent to the first accommodating cavity 101 in the radial direction of the housing 10 , and the bottom surface of the annular groove 1043 is at The vertical direction is higher than the bottom wall surface of the first accommodating cavity 101 . Since the bottom surface of the annular groove 1043 and the inner wall surface of the first accommodating cavity 101 are spaced apart in the inner and outer directions to form a gap channel, when the filling material flowing in through the pouring port flows from the inside to the outside, the filling material is suitable to flow through the gap channel.
  • annular groove 1043 when the annular groove 1043 is provided, it is not limited to configure that the bottom surface of the annular groove 1043 is higher than the bottom wall surface of the first accommodating cavity 101 in the up-down direction. When the walls are flush, the flow blocking effect of the annular groove 1043 remains unchanged.
  • the flow resistance between the first accommodating cavity 101 and the second accommodating cavity 102 can make the filling material preferentially fill in the space between the first accommodating cavity 101 and the second accommodating cavity 101 .
  • the flow blocking effect is better.
  • d5/d2 when d5/d2 is too large, the flow blocking effect of the annular groove 1043 is reduced, and the material cannot effectively fill the inner circle of the shell (that is, the filling material for forming the inner peripheral wall is insufficient), resulting in an airtight shell.
  • d5/d2 is too small, the material flow will be insufficient, which will cause the outer circle of the product to be underfilled (that is, the filling material to form the outer peripheral wall is insufficient), and the wall thickness of the shell at the annular groove is thin, which is difficult to achieve.
  • the strength of the shell in view of the above technical problems, in this technical solution, by setting 0.6 ⁇ d5/d2 ⁇ 0.1, the material flow tendency can be adjusted to preferentially form the inner peripheral wall, and the strength of the shell can be ensured.
  • the relative relationship between d5 and the wall thickness d3 of the outer peripheral wall 107 also affects the flow blocking effect of the annular groove 1043 . Further, when 0.2 ⁇ d5/d3 ⁇ 0.5 is satisfied, the flow blocking effect is better.
  • the filling material is suitable for flowing into the outer circumference of the first accommodation cavity through the gap between the outer wall surface of the annular groove 1043 and the inner wall surface of the first accommodation cavity 101 to form the outer peripheral wall. It can be understood that the size relationship between d5 and d3 It will affect the formation of the peripheral wall.
  • d5/d3 is greater than 0.5, the relative resistance of the annular groove is too small, the filling material to form the inner peripheral wall is insufficient, and the flow of the material between the first accommodating cavity and the second accommodating cavity is slow, resulting in Weld lines are formed on the inner peripheral wall, resulting in poor structural strength and reduced airtightness of the inner peripheral wall. Therefore, when 0.1 ⁇ d5/d3 ⁇ 0.3 is satisfied, the injection molding effect is good and the shell strength is high.
  • the arrangement of the annular groove 1043 is not limited to the form shown in FIG. 26 and FIG. 27.
  • the bottom surface of the annular groove 1043 is lower than the first A bottom wall surface of the accommodating cavity 101
  • the annular groove 1043 is generally located obliquely below the first accommodating cavity 101
  • the connection between the inner wall surface of the first accommodating cavity 101 and the bottom surface of the first accommodating cavity 101 and the outer wall surface of the annular groove 1043 and the annular A gap channel is formed between the joints of the bottom surfaces of the grooves 1043 , and when the filling material flows toward the outer periphery of the first accommodating cavity 101 , the filling material is suitable for flowing through the gap channel.
  • the annular groove has a good flow blocking effect.
  • the inventor found that under this technical solution, when d6/d2 is too large, the flow blocking effect of the annular groove 1043 is reduced, and the material cannot effectively fill the inner circle of the casing (that is, the filling material for forming the inner peripheral wall is insufficient), resulting in an airtight casing. If d6/d2 is too small, the material flow will be insufficient, which will cause the outer circle of the product to be underfilled (that is, the filling material to form the outer peripheral wall is insufficient), and the wall thickness of the shell at the annular groove is thin, it is difficult to Ensure the strength of the shell.
  • this technical solution by setting 0.6 ⁇ d6/d2 ⁇ 0.1, the material flow tendency can be adjusted to preferentially form the inner peripheral wall, and the strength of the shell can be ensured.
  • the filling material is adapted to flow into the outer periphery of the first accommodating cavity through the gap between the connection between the inner wall surface of the first accommodating cavity and the bottom surface of the first accommodating cavity and the junction between the outer wall surface of the annular groove and the bottom surface of the annular groove.
  • the size relationship between d6 and d3 will affect the formation of the peripheral wall. The inventor found that when d6/d3 is less than 0.2, the relative flow resistance of the annular groove is too large, and the filling material for forming the peripheral wall is insufficient. , and the wall thickness of the casing at the annular groove is relatively thin, and the strength of the casing is low.
  • the annular groove 1043 in the housing of the electronic water pump is annular.
  • the annular groove 1043 should be understood in a broad sense.
  • the annular groove 1043 may be a complete (continuous) ), or the multi-segment arc-shaped grooves may be arranged at intervals, and the outer peripheral contour enclosed by the multi-segment arc-shaped grooves and their connecting segments is annular.
  • the distance between the multi-segment arc-shaped grooves is less than or equal to the thickness d2 of the inner peripheral wall 106 .
  • the first end of the stator injection body 31 in the axial direction is provided with a positioning hole 311 , and the positioning hole 311 extends from the first end of the stator injection body 31 .
  • One end surface extends toward the second end of the stator injection molded body 31 (the lower end of the stator injection molded body 31 in FIG. 16 ).
  • the positioning hole 311 includes a first segment 3111 and a second segment 3112 arranged in sequence along its extending direction. The extending direction of the hole 311 does not change.
  • the top wall 105 is provided with a fitting portion 1051 , the top wall 105 includes a first side surface adjacent to the bottom wall 104 (the lower side surface of the top wall 105 in FIG. 17 ), and the fitting portion 1051 faces the bottom from the first side surface
  • the wall 104 is convex.
  • the matching portion 1051 includes a first matching portion 1052 and a second matching portion 1053 arranged in sequence along its protruding direction (up and down direction in FIG. 17 ). 1053 fits within the second segment 3112.
  • the cross-sectional area of the first matching portion 1052 gradually decreases along the protruding direction of the matching portion 1051 , and the cross-sectional area of the second matching portion 1053 does not change along the protruding direction of the matching portion 1051 .
  • the positioning can be completed through the insert and the positioning hole 311 .
  • the secondary injection material flows into the first section 3111, and when the secondary material fills the first section 3111 After the segment 3111, the insert starts to exit the second segment 3112.
  • the secondary injection material in the first segment 3111 naturally flows into the second segment 3112 of the positioning piece, effectively preventing air from entering the positioning member.
  • the secondary injection molding material can be prevented from being coagulated unevenly during coagulation, so as to generate fine cracks to increase the service life of the casing 10 .
  • the first section 3111 is a conical hole
  • the second section 3112 is a circular hole
  • the outer peripheral contour of the cross-section of the first matching portion 1052 and the cross-section of the second matching portion 1053 The outer peripheral contours of the cross-sections are all circular.
  • the first section 3111 and the second section 3112 can also be square holes with different cross-sectional sizes or holes of other shapes, and the first matching portion 1052 and the second matching portion 1053 are A cuboid or other shape solid combined with the first segment 3111 and the second segment 3112.
  • the first section 3111 is a conical hole
  • the second section 3112 is a circular hole
  • the outer peripheral contour of the cross-section of the first matching portion 1052 and the outer peripheral contour of the cross-section of the second matching portion 1053 are both circular.
  • the section 3111 is a conical hole and the second section 3112 is a round hole
  • the first section 3111 and the second section 3112 are easy to process and can make the secondary material flow from the first section 3111 into the second section 3112 more smoothly.
  • the cross-sectional area of the second section of one positioning hole is different from the cross-sectional area of the second section of the remaining positioning holes, which can be used for circumferential angle positioning, preventing the injection molding of the housing 10 Injection error during overmolding.
  • the inner peripheral surface of the stator injection molding body 31 is provided with a first groove 312 extending along the axial direction of the stator injection molding body 31 , and the outer peripheral surface of the inner peripheral wall 106 is provided along the housing 10 .
  • the axially extending protrusion 1061 is fitted in the first groove 312 .
  • the first groove 312 can increase the amount of over-molding
  • reduce the shear stress of the secondary injection molding material improve the internal stress of the secondary injection molding material at the inner circle of the product, thereby reducing the deformation risk of the secondary injection molding body due to large residual stress at the inner circle position.
  • the outer peripheral surface of the inner peripheral wall 106 of the housing 10 is formed with the stator injection molding body 31 on the outer peripheral surface.
  • the protrusions 1061 corresponding to the first grooves 312 on the inner peripheral surface strengthen the connection strength of the casing 10 and the stator injection body 31 and increase the thickness of the casing 10 at the first grooves 312, thereby increasing the thickness of the casing 10 at the first groove 312.
  • the overall strength of the body 10, and when the secondary injection material flows in the first groove 312, the cooling speed of the secondary injection material in the first groove 312 is slow, which can ensure the injection effect of the secondary injection material and prevent the secondary injection molding process. There is an underpayment.
  • the plurality of first grooves 312 are arranged at intervals along the circumference of the stator injection molded body 31 , and there are a plurality of protrusions 1061 , a plurality of protrusions 1061 are arranged at intervals along the circumferential direction of the housing 10 , and the plurality of protrusions 1061 are matched in the plurality of first grooves 312 in a one-to-one correspondence.
  • the thickness of the first groove can be further enhanced by providing a plurality of first grooves and protrusions, which increases the connection strength between the stator injection body and the casing, thereby increasing the overall strength and enhancing the product. service life.
  • the stator assembly 30 includes a stator core 32 , an insulating frame 33 , pins 34 , windings 35 and a fixing plate 36 .
  • the insulating frame 33 is provided at the end of the stator iron core 32 in the axial direction (up and down direction in FIG. 12 ), and the upper and lower ends of the stator iron core 32 are provided with the insulating frame 33 .
  • the plurality of pins 34 are arranged at intervals, at least some of the pins 34 are connected to the insulating frame 33 at one end, and the lower end of each pin 34 is connected to the insulating frame 33 at the upper end of the stator core 32 .
  • the winding 35 is wound around the teeth of the stator core 32 , the lead wire of the winding 35 is connected to the pin 34 , and the stator injection body 31 covers one end of the pin 34 , the winding 35 , the insulating frame 33 and the stator core 32 .
  • the fixing plate 36 is arranged on the side of the insulating frame 33 away from the stator iron core 32 , a part of the fixing plate 36 is located in the casing 10 , the other part of the fixing plate 36 is located in the stator injection body 31 , and the other ends of the plurality of pins 34 It is connected to the control board 60 through the stator injection body 31 , the fixing plate 36 and the bottom wall 104 .
  • the stator core 32 , the insulating frame 33 , the windings 35 and the plurality of pins 34 are formed by the stator injection body 31 , so that the connection strength between the pins 34 and the insulating frame 33 can be enhanced, thereby enhancing the winding 35
  • the stability of the connection with the pins 34 can protect the stator assembly 30 inside the overmolded body, preventing the pins 34 from being deformed and skewed due to impact during the overmolding process when the housing 10 is formed. .
  • the outer peripheral surface of the stator core 32 is provided with a second groove (not shown), and one end of one of the plurality of pins 34 is fitted in the second groove.
  • the second groove is matched with the above-mentioned one pin 34, so that the pin 34 is connected to the ground through the second groove, and at the same time, the second groove and the stator injection body 31 can be grounded.
  • the pin 34 is supported by the pin 34, the stability of the pin 34 is enhanced, and the pin 34 is prevented from being deformed.
  • the material of the stator injection body 31 is a thermosetting material
  • the material of the insulating frame 33 and the material of the fixing plate 36 are thermoplastics
  • the curing temperature of the thermosetting material is lower than the softening temperature of the thermoplastic material
  • the thermal decomposition temperature of the thermosetting material is higher than that of the casing. 10 injection temperature.
  • Using a thermosetting material with a curing temperature lower than the softening temperature of the thermoplastic material will not cause damage to components such as the winding 35 inside the stator injection body 31 during injection molding, thereby ensuring the performance reliability of the electronic water pump.
  • the shell strength and weather resistance requirements of electronic water pumps are relatively high.
  • High-strength engineering plastics are often used in production, and high-strength engineering plastics often have high molding temperatures and high costs.
  • the stator injection body 31 of the primary overmolded stator assembly 100 and the casing 10 of the secondary injection casing assembly can be formed of different plastics.
  • the casing 10 requires high strength and good weather resistance, and can be Thermoplastic engineering plastics with higher cost and lower strength required for the stator injection molded body 31 can use thermosetting plastics with lower cost, which not only ensures the strength of the casing 10 but also saves the material cost.
  • the stator core 32 , the insulating frame 33 , the windings 35 , the stator injection molded body 31 and the fixing plate 36 are provided inside the housing 10 , and a part of the pins 34 is located inside the housing 10 .
  • the high temperature and high pressure injection plastic is easy to impact the pins and the solder joints of the pins and the windings, the pins are easily deformed, and it is easy to cause the problems of false welding and open circuit between the pins and the windings. Therefore, in the present application, by setting a fixing plate, the fixing plate can fix the pins to avoid the deformation of the pins.
  • the fixing plate can also affect the flow of the injection plastic, so as to avoid the solder joints of the pins and the windings being affected by the injection plastic.
  • the frontal impact avoids the problems of virtual welding and open circuit between the pin and the winding, and improves the connection reliability of the pin and the winding.
  • the pins are matched with the insulating frame through the fixing plate, and the fixing plate can support and fix the pins to a certain extent, so that the plurality of pins can be stably connected to the insulating frame, thereby enhancing the insertion
  • the strength of the connection between the pin and the insulating frame prevents pin deformation.
  • the fixed plate can limit the position of the pins, which can effectively protect the solder joints between the pins and the windings, and avoid the solder joints between the pins and the windings due to high temperature and high pressure when the injection molded body is injection molded.
  • the resulting shock causes problems with soldering and open circuits.
  • the pins When entering the mold, since the pins are fixed by the fixing plate, the pins can assist the rapid positioning of the injection molded body and the corresponding position of the insert in the mold, so as to avoid the rubber material overflowing near the pins when the shell is formed and forming The residual burr can effectively improve production efficiency and reduce product defect rate.
  • the fixing plate 36 has a plurality of through holes, and the plurality of through holes 36 pass through the fixing plate 36 along the thickness direction of the fixing plate 36 .
  • the plurality of through holes include a first through hole 361 , a second through hole 362 , a third through hole 363 and a fourth through hole 364 .
  • the plurality of pins 34 include a first electrical connector 341 , a second electrical connector 342 , a third electrical connector 343 and a ground component 344 .
  • the first electrical connection piece 341 passes through the fixing plate 36 through the first through hole 361
  • the second electrical connection piece 342 passes through the fixing plate 36 through the second through hole 362
  • the third electrical connection piece 343 passes through the third through hole 363
  • the fixing plate 36 and the grounding member 344 pass through the fixing plate 36 through the fourth through hole 364 .
  • three pins 34 are provided on the fixing plate 36 , and the three pins 34 are respectively connected with the first through hole 361 , the second through hole 362 and the third through hole 363 one by one.
  • the three pins 34 are all phase pins.
  • four pins 34 are provided on the fixing plate 36 , and the four pins 34 are respectively connected to the first through hole 361 , the second through hole 362 , the third through hole 363 and the first through hole 361 , the second through hole 362 , and the third through hole 363 .
  • the four through holes 364 are in one-to-one correspondence, and three of the pins 34 are phase pins, and one pin 34 is a ground pin.
  • the fixing plate 36 is generally set as an arc-shaped plate, and the curvature of the arc-shaped curve of the arc-shaped plate is the same as that of the winding, so that the matching between the pins 34 and the fixing plate 36 is achieved. It is more convenient, and stabilizes the cooperation between the pin 34 and the fixing plate 36, avoids pin deformation, reduces pressure and impact when the stator injection body is injection molded, and avoids false welding and open circuit.
  • the fixing plate 36 includes a body and a first boss protruding upward on the body.
  • the first through hole 361 , the second through hole 362 , and the third through hole 363 face from the upper surface of the first boss toward The bottom penetrates the first boss and the body.
  • the first boss includes three circular truncated parts arranged at intervals and a connecting part connected between adjacent circular truncated parts.
  • the three circular truncated portions are respectively a first circular truncated portion 2621 , a second circular truncated portion 2622 and a third circular truncated portion 2623 .
  • the first connecting part 2624 connects the first circular truncated part 2621 and the second circular truncated part 2622;
  • the second circular truncated portion 2622 and the third circular truncated portion 2623 are two connecting parts, and the two connecting parts.
  • the first through hole 361 penetrates the first circular truncated portion and the body
  • the second through hole 362 penetrates the second circular truncated portion and the body
  • the third through hole 363 penetrates the third circular truncated portion and the body.
  • the stability of the connection between the fixing plate 36 and the pins 34 can be enhanced. , protect the main body and increase the service life of the fixed plate 36.
  • the connecting part By setting the connecting part, the overall strength of the circular truncated part is enhanced, thereby further strengthening the overall strength of the fixed plate 36 and increasing the service life of the product.
  • the body is generally an arc-shaped plate, a plurality of circular truncated portions are arranged at intervals along the length direction of the body, and the connecting portion generally extends along the length direction of the body.
  • the body is generally set as an arc-shaped plate, and the curvature of the arc-shaped curve of the arc-shaped plate is the same as that of the winding, so that the coordination between the pins 34 and the fixing plate 36 is more convenient.
  • the coordination between the pins 34 and the fixing plate 36 is stabilized, the deformation of the pins is avoided, the pressure and impact generated during the injection molding of the stator injection body can be reduced, and the occurrence of virtual welding and open circuit can be avoided.
  • the body includes a first end surface and a second end surface that are oppositely arranged in its length direction, the body includes a first side surface and a second side surface that are oppositely arranged in its width direction, and the first side surface of the body is provided with a protruding portion, The protruding portion is adjacent to the first end face of the body.
  • the fixing plate 36 further includes a second boss spaced apart from the first boss, the second boss is connected to the body and the protruding portion, and the fourth through hole 364 penetrates the second boss and the body and/or the protruding portion.
  • the second boss is provided at the connection between the body and the protruding portion, and the fourth through hole penetrates the second boss and the connection between the body and the protruding portion.
  • the present application is not limited to this.
  • the second boss is provided on the protruding portion, and the fourth through hole 364 passes through the second boss and the protruding portion; The through hole 364 penetrates through the second boss and the body.
  • the outer peripheral contour of the second boss is circular, and there is one second boss. Therefore, while the electronic water pump of the embodiment of the present application protects the body through the first boss, the stability of the connection between the phase pins close to the second end face and the fixing plate 36 is enhanced, and the While protecting the body and/or the protruding portion of the second end face, the stability of the connection between the grounding pin and the fixing plate 36 is enhanced.
  • the control board 60 has a grounding portion 61 , the grounding portion 61 abuts with the end cover 20 , the end cover 20 is a conductor, and the outer peripheral surface of the stator core 32 is provided with a mounting portion , the first end of the grounding member 344 in its extending direction (as shown in the upper end of the grounding member 344 in FIG. 4 ) is connected to the mounting portion, and the second end of the grounding member 344 in its extending direction (as shown in the upper end of the grounding member 344 in FIG. 4 ) The lower end) is connected to the control board 60. Specifically, the second end of the grounding member 344 is spaced apart from the grounding portion 61 and connected to the circuit on the control board 60 .
  • the end cap 20 and the grounding member 344 are both made of conductor material, the end cap 20 is provided at the end of the housing 10 , and the control board 60 is provided in the fourth accommodating cavity 201 , in other words, the control board 60 is provided in the end cap Inside of 20.
  • the control board 60 has a grounding portion 61 , and the grounding portion 61 is in contact with the end cap 20 .
  • the grounding portion 61 is in contact with the end cap 20 so that current can be conducted between the control board 60 and the end cap 20 .
  • the electronic water pump of the embodiment of the present application requires fewer components to realize grounding through the above-mentioned grounding method, is easy to install, and is reliable and not easy to fall off, which improves the reliability of the electronic water pump during operation.
  • the grounding member 344 includes a first segment 3441 and a second segment 3442 connected in sequence along its extending direction, the first segment 3441 is connected to the mounting portion, and the second segment 3442 is connected to the grounding portion 61 . Connected, the cross-sectional area of the second segment 3442 is smaller than the cross-sectional area of the first segment 3441 .
  • the cross-sectional area of the second section 3442 is smaller than the cross-sectional area of the first section 3441 , so that it is convenient for the operator to insert the grounding member 344 into the control board 60 to weld and fix the second section 3442 .
  • the end surface of the second segment 3442 away from the first segment 3441 (the lower end surface of the second segment 3442 as shown in FIG. 4 ) and a side of the control board 60 adjacent to the end cap 20 (the lower surface of the control board 60 as shown in FIG. 4 ) spaced apart.
  • the distance between the end surface of the second segment 3442 away from the first segment 3441 and a side surface of the control board 60 adjacent to the end cap 20 is greater than or equal to 0.5 mm. Therefore, the embodiment of the present application can prevent the lower end surface of the second section 3442 from being close to the control board 60, and the solder cannot be fully immersed into the insertion hole of the second section 3442, resulting in the problem of weak welding.
  • the lower end of the grounding member 344 is spaced apart from the grounding portion 61 and connected to the circuit on the control board 60 .
  • one end of the grounding member 344 connected to the control board 60 is not directly connected to the grounding portion 61
  • one end of the grounding member 344 connected to the control board 60 is connected to the grounding portion 61 through the circuit on the control board 60 . Therefore, the embodiments of the present application can reduce the electromagnetic interference of the electronic water pump to a certain extent, and facilitate the layout planning of the circuit on the control board 60 by technicians, thereby improving the space utilization rate inside the electronic water pump.
  • the grounding portion 61 is provided with an elastic sheet (not shown) that is a conductor, and the grounding portion 61 abuts with the end cap 20 through the elastic sheet.
  • the dome has elasticity and the dome is made of conductive material. During the rotation of the stator assembly 30, even if slight vibration occurs, the contact between the grounding portion 61 and the end cover 20 can still be maintained.
  • a grounding boss 21 is provided on the inner side of the end cover 20 adjacent to the control board 60 .
  • one end of the end cover 20 adjacent to the control board 60 is provided with a flange 22 extending outward in the circumferential direction, and the outer edge of the flange 22 is provided with a plurality of lugs 221,
  • the lugs 221 are arranged at intervals along the circumferential direction of the flange 22.
  • the plurality of lugs 221 are provided with first threaded holes, and the housing 10 is provided with second threaded holes corresponding to the first threaded holes on the lugs 221.
  • the fastener connects the housing 10 and the lug 221 through the first threaded hole and the second threaded hole.
  • a gasket may be provided at the connection between the flange 22 and the casing 10 , or a sealant may be filled to improve the dustproof and waterproof performance of the connection between the end cover 20 and the casing 10 .
  • the pins 34 extend along the axial direction of the stator core 32 , and the pins 34 extend from the housing 10 into the end cover 20 , and the pins 34 extend in the direction of extension.
  • the upper end is matched with the insulating frame 33 , and the lower end of the pin 34 in the extending direction is connected with the control board 60 .
  • the windings 35 are wound on the teeth of the stator core 32 , and the lead wires of the windings 35 are connected to the pins 34 .
  • the three-phase lead wires of the winding 35 are respectively connected to the three pins 34 and are connected to the control board 60 through the three pins 34 .
  • the pin 34 includes a body 3401 , a first portion 3402 , a first extension portion 3403 , a second extension portion 3404 and a second portion 3405 .
  • the body 3401 extends along the axial direction of the stator core 32 , the upper end of the body 3401 is connected to the first part 3402 , and the lower end of the body 3401 is connected to the control board 60 .
  • the first extension portion 3403 and the second extension portion 3404 both extend from the upper end surface of the first portion 3402 in a direction away from the body 3401 .
  • the electronic water pump further includes an overmolded body 40 , the overmolded body 40 is wrapped around a part of the outer periphery of the pin 34 , and the overmolded body 40 is away from the stator from the bottom wall 104 .
  • the sides of the assembly 30 are connected, and the overmolding body 40 and the control board 60 are spaced apart in the axial direction of the housing 10 , and the housing 10 and the overmolding body 40 are integrally formed by injection molding.
  • the overmolding body 40 is provided on the outer periphery of the pin 34 and the overmolding body 40 is connected to the upper surface of the bottom wall 104 to fix the pin 34.
  • the overmolding body 40 acts as a fixed support for the pin 34, which can reduce the probability of deformation or damage of the pin 34 during processing, transportation and assembly.
  • the overmolding body 40 and the control board 60 are spaced apart in the axial direction of the housing 10 , which can avoid interference between the overmolding body 40 and the control board 60 and facilitate the operator to weld the pins 34 to the control board. 60, to improve the welding effect of the product.
  • the overmolding body 40 has a through hole 41, a part of the pin 34 is fitted in the through hole 41, and the distance between the inner wall surface of the through hole 41 and the outer peripheral surface of the overmolding body 40 is greater than 0 mm and less than or equal to 5mm.
  • the through holes 41 penetrate the upper and lower ends of the overmolding body 40 along the axial direction of the overmolding body 40 , and the through holes 41 penetrate the upper and lower surfaces of the bottom wall 104 for the pins 34 to pass through.
  • the lower end of the pin 34 is inserted into the through hole 41 and penetrates downward out of the bottom wall 101 .
  • the distance between the end surface of the overmolded body 40 adjacent to the control plate 60 and the distance between the end surface of the control plate 60 adjacent to the overmolded body 40 is greater than or equal to 1 mm and less than or equal to 3 mm. Therefore, the embodiments of the present application can improve the connection strength of the overmolded body 40 with the pins 34 and the control board 60 , and reduce the probability of deformation or damage of the pins 34 during processing, transportation, and assembly.
  • the outer peripheral contour of the overmolded body 40 may be a polygon, a circle or an ellipse.
  • the cross-sectional area of the overmolded body 40 may be polygonal, circular or elliptical.
  • the overmolded body 40 includes an upper end surface and a lower end surface
  • the outer peripheral contour of the upper end surface of the overmolded body 40 may be a polygon, a circle or an ellipse
  • the outer peripheral contour of the lower end surface of the overmolded body 40 may be a polygon, a circle shape or oval.
  • the cross-sectional area of the overmolded body 40 gradually decreases in the direction toward the control board 60 , or the cross-sectional area of the overmolded body 40 is constant along the axial direction of the housing 10 .
  • the cross-sectional area of the overmolded body 40 may be constant or variable along its axial direction.
  • the cross-sectional area of the overmolded body 40 is gradually reduced in the direction toward the control board 60 , that is, a smooth and uniform transition is made in the form of a small top and a large bottom, so that the lower end surface of the overmolded body 40 and the control board 60 form a certain angle.
  • a trumpet-shaped mold cavity that is, an inverted conical mold cavity, can be formed in the mold.
  • This structure is beneficial to guide, shape and fix the pins 34 during the mold clamping process, prevent the pins 34 from being deformed, and ensure the positioning accuracy of the stator assembly 30 in the circumferential direction of the housing 10 .
  • the bottom wall 104 is provided with a mounting hole 11 , and the mounting hole 11 extends from the bottom wall 104 of the second accommodating cavity 102 toward the third accommodating cavity 103 , and the shaft base 12 At least part of it is arranged in the mounting hole 11, and the outer peripheral contour of the cross section of the shaft base 12 is non-circular, the shaft base 12 has the first shaft hole 13 facing the second accommodating cavity 102, and the shaft 50 is in its axial direction.
  • One end passes through the rotor assembly and fits into the first rotating shaft hole 13 to be connected with the shaft base 12 .
  • the shaft base 12 is one piece with the housing 10 .
  • the shaft base 12 and the housing 10 can be formed by injection molding by passing the injection plastic into the corresponding injection mold.
  • the electronic water pump according to the embodiment of the present application has two injection molding processes in the manufacturing process, one injection molding process is to form a stator injection body to cover the stator assembly 30, and the secondary injection process is to inject the housing 10 and the shaft.
  • the base 12 is injection-molded into one piece to cover the stator injection-molded body 31 .
  • the cross-section of the shaft base 12 has a non-circular outer peripheral contour, and as shown in FIG. Specifically, as shown in FIG. 1 , the first shaft hole 13 penetrates the shaft base 12 in the up-down direction.
  • the lower end of the shaft 50 in the axial direction is fitted in the first shaft hole 13 to connect the shaft 50 and the shaft base 12 .
  • the rotating shaft 50 and the shaft base 12 cannot rotate relative to each other.
  • the rotating shaft 50 and the first rotating shaft hole 13 are in interference fit to prevent rotation between the rotating shaft 50 and the shaft base 12.
  • the matching manner of the rotating shaft 50 and the shaft base 12 in the present application is not limited to this, for example, the rotating shaft 50 is welded to the shaft base 12 and other fastening connections to prevent rotation between the two.
  • the shaft base 12 is used for installing the rotating shaft 50 to connect the rotating shaft 50 on the bottom wall 104 of the housing 11 .
  • the shaft and the casing are connected by the shaft base, and the shaft base and the casing are integrally formed by injection molding, and the cross-section of the shaft base has a non-circular outer peripheral contour, which avoids the direct injection molding of the rotating shaft and the casing. Therefore, the direct contact between the metal structure and the non-metal structure is small and the contact area is small, and the rotating shaft is not easy to rotate and fall off, which prolongs the service life of the shell assembly and the electronic water pump.
  • the electronic water pump of the embodiment of the present application is formed by one-time injection molding of the stator injection body, and then the casing component is injection-molded for a second time to achieve a self-sealing effect with the rotor, eliminating the need for an isolation sleeve between the stator component and the rotor air gap, reducing the cost of
  • the material cost of the shell assembly simplifies the assembly process of the electronic water pump, and improves the rigidity of the stator assembly, which is beneficial to the improvement of the noise of the electronic water pump and improves the reliability of the operation of the electronic water pump.
  • the lower end surface of the shaft base 12 is provided with a plurality of convex portions 14 , and the plurality of convex portions 14 are arranged at intervals along the circumference of the shaft base 12 on the outer circumference of the first rotating shaft hole 13 .
  • the convex portion 14 is used to cooperate with the concave portion on the housing 10 .
  • the lower end surface of the shaft base 12 is provided with a plurality of concave portions (not shown), and the plurality of concave portions are arranged at intervals along the circumferential direction of the shaft base 12.
  • the concave portions are used for connecting with the housing 10 Match the protrusions on the top.
  • the shaft base 12 includes a base body 15 and a boss 16.
  • One end face of the base body 15 (the lower side of the base body 15 as shown in Figures 4-5) is connected to the bottom wall 104, and the boss 16 extends from the other end face of the base body 15 (as shown in Figure 4).
  • the upper side of the base body 15 in FIG. 5 protrudes outward, and the outer end surface of the boss 16 (the upper side of the boss 16 in FIGS.
  • the outer peripheral contour of the base body 15 is circular
  • the outer peripheral contour of the boss 16 is non-circular
  • at least part of the outer peripheral contour of the boss 16 is located on the base body 15. inside the peripheral outline.
  • the present application is not limited to the projection plane orthogonal to the longitudinal direction of the shaft base 12 , and the boss 16 includes the form of a straight edge.
  • the position corresponding to the straight edge may also be in other forms such as a curved segment.
  • the electronic water pump further includes a clamping member 70 , and the clamping member 70 is used to fix the control board 60 .
  • the clamping piece 70 includes a clamping body 71 , a transition section 72 and a clamping boss 73 .
  • the transition section 72 is provided on the end surface of the clamping body 71 and the cross-sectional area of the transition section 72 perpendicular to the up-down direction is smaller than the cross-sectional area of the clamping body 71 perpendicular to the up-down direction.
  • the transition section 72 passes through the control plate 60 .
  • the clamping member 70 has a clamping groove 74, and the clamping groove 74 extends through the clamping boss 73 and the transition section 72 to the clamping body 71 in the up-down direction, so that the clamping groove 74 is in the clamping boss.
  • the upper end surface of the clamping member 73 is opened, and the clamping groove 74 is opened at the outer peripheral surface of the clamping member 70 .
  • the transition section and the clamping boss pass through the control board and the control board is fixed between the clamping boss and the clamping body, the control board is limited by the transition section, and the control board is limited by the transition section.
  • the clamping boss and the clamping body can fix the control board, which makes the installation of the control board more stable, effectively protects the control board, and prolongs the service life of the control board.
  • the distance between the end surface of the control board 60 adjacent to the bottom wall 104 and the side surface of the bottom wall 104 adjacent to the control board 60 is A, and the other end of the pin 34 (the lower end of the pin 34 in FIG. 19 )
  • the control board 60 is connected to the control board 60 by soldering, and the solder protrudes from the end surface of the control board 60 adjacent to the bottom wall 104 by a distance B, and the end of the other end of the pin 34 (the upper end of the pin 34 in FIG. 19 ) is connected to the bottom wall 104
  • the distance between the sides adjacent to the control board 60 is H, the dimension of the overmolded body 40 in the axial direction of the housing 10 is h, and satisfies:
  • W is the end deflection of the other end of the pin
  • P is the load on the end of the other end of the pin
  • E is the elastic modulus
  • I is the moment of inertia of the section.
  • the outer peripheral contour of the cross section of the pin 34 is a rectangle
  • the control board 60 is provided with a through hole
  • the lower end of the pin 34 passes through the control board 60 through the through hole.
  • the pin 34 When the pin 34 is not welded into the through hole, the pin 34 and the through hole are in clearance fit, that is, the pin 34 can swing circumferentially in the through hole.
  • the pin 34 When the pin 34 is welded into the through hole, the pin 34 is A cantilever beam structure fixed at one end.
  • the maximum dimension h of the overmolded body 40 in the axial direction of the housing 10 needs to satisfy: h ⁇ AB, that is, the maximum dimension h of the overmolded body 40 in the axial direction of the housing 10 cannot exceed the solder protrusion control
  • a vehicle according to an embodiment of the present application includes the electronic water pump described in the above embodiment.
  • the vehicles may be new energy vehicles, fuel vehicles, etc., wherein new energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, and the like.
  • the vehicle according to the present application can reduce the vibration amplitude of the electronic water pump during operation, and the rotating shaft is not easy to rotate and fall off, thereby prolonging the service life of the electronic water pump, thereby improving the performance of the vehicle.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plurality means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified.
  • installed installed
  • connected connected
  • fixed a detachable connection
  • it can be a mechanical connection or an electrical connection or can communicate with each other
  • it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified.
  • the specific meanings of the above terms in this application can be understood according to specific situations.
  • a first feature "on” or “under” a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary get in touch with.
  • the first feature being “above”, “over” and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
  • the terms “one embodiment,” “some embodiments,” “example,” “specific example,” or “some examples,” etc. mean the specific features, structures, materials, or characteristics described in connection with the embodiment or example. Features are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

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Abstract

一种电子水泵和车辆，电子水泵包括壳体（10）、端盖（20）、定子组件（30）、定子注塑体（31）、转子组件、转轴（50）和控制板（60），壳体（10）内具有第一容纳腔（101）、第二容纳腔（102）和第三容纳腔（103），端盖（20）设在壳体（10）的一端以封闭第三容纳腔（103），定子注塑体（31）和定子组件（30）的一部分设在第一容纳腔（101）内，定子注塑体（31）一次注塑形成以至少部分包覆定子组件（30），壳体（10）二次注塑形成以包覆定子注塑体（31），转子组件设在第二容纳腔（102）内，转轴（50）在其轴向上的一端穿过转子组件与底壁（104）相连，控制板（60）位于第三容纳腔（103）内或端盖（20）内，定子组件（30）的另一部分穿出底壁（104）以与控制板（60）相连。该电子水泵使用寿命长，性能高，体积小，成本低。

Description

电子水泵和车辆
相关申请的交叉引用
本申请要求申请号为202010722680.3、申请日为2020年7月24日的中国专利申请的优先权和权益，上述中国专利申请的全部内容在此通过引用并入本申请。
技术领域
本申请的实施例涉及电子水泵技术领域，具体地，涉及一种电子水泵和具有该电子水泵的车辆。
背景技术
电子水泵因具有控制精确、效率高的优势而得到广泛应用。
相关技术中，电子水泵的壳体强度不高，使用寿命短，影响电子水泵的性能，且由于定子组件的体积相对较大，电子水泵的体积大，不利于电子水泵的小型化和广泛应用。此外相关技术中电子水泵的材料成本高，因此，存在改进的需求。
申请内容
本申请旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本申请的一方面的实施例提出了一种电子水泵，该电子水泵的使用寿命长，性能高，体积小，成本低。
本申请的另一方面的实施例提出了一种具有该电子水泵的车辆。
根据本申请的第一方面的实施例的电子水泵包括：壳体，所述壳体内具有第一容纳腔、第二容纳腔和第三容纳腔，所述第一容纳腔环绕在所述第二容纳腔的外侧，所述第二容纳腔和所述第三容纳腔在所述壳体的轴向上间隔布置，所述第二容纳腔朝向背离所述第三容纳腔的方向开口，所述第三容纳腔朝向背离所述第二容纳腔的方向开口，所述壳体包括顶壁、底壁、外周壁和内周壁，所述顶壁、所述底壁、所述外周壁和所述内周壁围成所述第一容纳腔，所述内周壁和所述底壁围成所述第二容纳腔，所述底壁和所述外周壁围成所述第三容纳腔；端盖，所述端盖设在所述壳体的一端以封闭所述第三容纳腔；定子组件和定子注塑体，所述定子注塑体和所述定子组件的一部分设在所述第一容纳腔内，所述定子注塑体一次注塑形成以包覆一部分所述定子组件，所述壳体二次注塑形成以包覆所述定子注塑体；转子组件，所述转子组件设在所述第二容纳腔内；转轴，所述转轴在其轴向上的一 端穿过所述转子组件与所述底壁相连；控制板，所述控制板位于所述第三容纳腔内或所述端盖内，所述定子组件的另一部分穿出所述底壁以与所述控制板相连。
根据本申请实施例的电子水泵，通过定子注塑体一次注塑形成以至少部分包覆定子组件，壳体二次注塑形成以包覆定子注塑体，且壳体具有容纳至少部分定子组件的第一容纳腔、容纳转子组件的第二容纳腔以及与第一容纳腔和第二容纳腔通过底壁间隔开的第三容纳腔，利用上述两次注塑成型的方式，既可以保证机壳注塑体的强度，也可以节省材料成本，而且定子注塑体的体积可以较小，注塑成型时间缩短，注塑时，可以避免对定子注塑体内部的绕组等部件造成损坏，从而确保电子水泵的性能可靠性使用寿命长，性能高，体积小，成本低。
在一些实施例中，所述第三容纳腔的底壁面包括与所述第一容纳腔在所述壳体的轴向上相对的第一部和与所述第二容纳腔在所述壳体的轴向上相对的第二部，所述底壁设有环形槽，所述环形槽从第三容纳腔的底壁面朝向所述第一容纳腔凹入，且所述环形槽的至少部分位于所述第一部。
在一些实施例中，所述底壁包括围成所述环形槽的周壁面，所述周壁面包括间隔布置的第一壁面和第二壁面，所述第一壁面和所述第二壁面均为环形，且在正交于所述壳体的轴向的投影面上，所述第一壁面的投影位于所述第二壁面的投影内，所述第一壁面位于所述第一部，所述第二壁面位于所述第一部或所述第二部。
在一些实施例中，所述定子注塑体在其轴向上的第一端设有定位孔，所述定位孔从所述定子注塑体的第一端面向所述定子注塑体的第二端延伸，所述定位孔包括沿其延伸方向依次布置的第一段和第二段，所述第一段的横截面积沿所述定位孔的延伸方向逐渐减小，所述第二段的横截面积沿所述定位孔的延伸方向不变；所述顶壁设有配合部，所述顶壁包括邻近所述底壁的第一侧面，所述配合部从所述第一侧面朝向所述底壁凸出，所述配合部包括沿其凸出方向依次布置的第一配合部和第二配合部，所述第一配合部配合在所述第一段内，所述第二配合部配合在所述第二段内，所述第一配合部的横截面积沿所述配合部的凸出方向逐渐减小，所述第二配合部的横截面积沿所述配合部的凸出方向不变。
在一些实施例中，所述第一段为圆锥孔，所述第二段为圆孔，所述第一配合部的横截面的外周轮廓和所述第二配合部的横截面的外周轮廓均为圆形。
在一些实施例中，所述定位孔为多个，其中一个所述定位孔的第二段的横截面积与其余所述定位孔的第二段的横截面积不同。
在一些实施例中，所述定子注塑体的内周面设有沿所述定子注塑体的轴向延伸的第一凹槽，所述内周壁的外周面设有沿所述壳体的轴向延伸的凸起，所述凸起配合在所述第一凹槽内。
在一些实施例中，所述第一凹槽为多个，多个所述第一凹槽沿所述定子注塑体的周向间隔布置，所述凸起为多个，多个所述凸起沿所述壳体的周向间隔布置。
在一些实施例中，所述定子组件包括：定子铁芯；绝缘框架，所述绝缘框架设在所述定子铁芯的轴向上的端部；多个插针，多个所述插针间隔布置，多个所述插针中的至少部分插针的一端与所述绝缘框架相连；绕组，所述绕组缠绕于所述定子铁芯的齿部，所述绕组的引出线与所述插针相连，所述定子注塑体包覆所述插针的一端、所述绕组、所述绝缘框架和所述定子铁芯；固定板，所述固定板设在所述绝缘骨架的远离所述定子铁芯的一侧，所述固定板的一部分位于所述壳体内，所述固定板的另一部分位于所述定子注塑体内，多个所述插针的另一端穿过所述定子注塑体、所述固定板和所述底壁与所述控制板相连。
在一些实施例中，所述固定板具有多个沿其厚度方向贯通所述固定板的通孔，多个所述通孔包括第一通孔、第二通孔、第三通孔和第四通孔，多个所述插针包括第一电连接件、第二电连接件、第三电连接件和接地件，所述第一电连接件通过所述第一通孔穿过所述固定板，所述第二电连接件通过所述第二通孔穿过所述固定板，所述第三电连接件通过所述第三通孔穿过所述固定板，所述接地件通过所述第四通孔穿过所述固定板。
在一些实施例中，所述控制板具有接地部，所述接地部与所述端盖抵接，所述端盖为导体，所述定子铁芯的外周面设有安装部，所述接地件在其延伸方向上的第一端与所述安装部相连，所述接地件在其延伸方向上的第二端与所述控制板相连，所述接地件的第二端与所述接地部间隔布置且通过所述控制板上的电路相连。
在一些实施例中，所述接地件包括沿其延伸方向依次布置的第一段和第二段，所述第一段与所述安装部相连，所述第二段与所述接地部相连，所述第二段的横截面积小于所述第一段的横截面积。
在一些实施例中，所述第二段的远离所述第一段的端面与所述控制板的邻近所述端盖的一侧面间隔开。
在一些实施例中，所述接地部设有为导体的弹片，所述接地部通过所述弹片与所述端盖抵接。
在一些实施例中，所述的电子水泵还包括包塑体，所述包塑体包覆在所述插针的一部分的外周，所述包塑体与所述底壁的远离所述定子组件的侧面相连，且所述包塑体与所述控制板在所述壳体的轴向上间隔开，所述壳体和所述包塑体一体注塑形成。
在一些实施例中，所述控制板邻近所述底壁的端面与所述底壁的邻近所述控制板的侧面之间的距离为A，所述插针的另一端通过焊锡与所述控制板相连，所述焊锡凸出所述控制板的邻近所述底壁的端面的距离为B，所述插针的另一端的端部与所述底壁的邻近所述控制板的侧面之间的距离为H，所述包塑体在所述壳体的轴向上的尺寸为h，且满足：
Figure PCTCN2020135040-appb-000001
其中W为所述插针的另一端的端部挠度，P为所述插针的另一端的端部所受载荷，E为弹性模量，I为截面惯矩。
在一些实施例中，所述底壁设有安装孔，所述安装孔从所述第二容纳腔的底壁面朝向所述第三容纳腔延伸，所述的电子水泵还包括轴底座，所述轴底座的至少部分设在所述安装孔内，且所述轴底座的横截面的外周轮廓为非圆形，所述轴底座具有朝向所述第二容纳腔的第一孔，所述转轴在其轴向上的一端穿过所述转子组件配合在所述第一孔内以与所述轴底座相连，所述轴底座与所述壳体一体注塑形成。
根据本申请的第二方面的实施例的车辆包括本申请任一项实施例中所述的电子水泵。
根据本申请实施例的车辆通过采用上述电子水泵，车辆的电子水泵性能好，结构强度高。
附图说明
图1是根据本申请实施例的电子水泵的一个结构示意图。
图2是图1中壳体的一个示意图。
图3是图1中壳体的另一个示意图。
图4是图3中轴底座的一个示意图。
图5是图3中轴底座的另一个示意图。
图6是图3中局部A的放大示意图。
图7是根据本申请实施例的电子水泵的另一个结构示意图。
图8是图7中定子组件的部分示意图。
图9是图7中接地件的示意图。
图10是图7中插针的示意图。
图11是图1中端盖的示意图。
图12是本申请实施例的定子组件的一个示意图。
图13是本申请实施例的定子组件的另一个示意图。
图14是图12中固定板的示意图。
图15是图13中固定板的示意图。
图16是本申请实施例的定子组件的又一个示意图。
图17是图1中壳体的又一个示意图。
图18是图17中壳体的俯视图。
图19是图1中包塑体的示意图。
图20是图19中局部C的放大示意图。
图21是图20中包塑体的一个示意图。
图22是图20中包塑体的另一个示意图。
图23是图19中包塑体的剖视图。
图24是根据本申请实施例的电子水泵的卡紧件的示意图。
图25是图3中壳体的再一个示意图。
图26是图3中壳体的又一个示意图。
图27是图26中局部B的放大示意图。
图28是图26中壳体的另一个示意图。
图29是图28中局部D的放大示意图。
附图标记：
壳体10，第一容纳腔101，第二容纳腔102，第三容纳腔103，底壁104，第一部1041，第二部1042，环形槽1043，顶壁105，配合部1051，第一配合部1052，第二配合部1053，内周壁106，凸起1061，外周壁107，第一孔11，轴底座12，第一转轴孔13，凸部14，基体15，凸台16，
端盖20，第四容纳腔201，凸台21，凸缘22，凸耳221，
定子组件30，定子注塑体31，定位孔311，第一段3111，第二段3112，第一凹槽312，定子铁芯32，绝缘框架33，插针34，第一电连接件341，第二电连接件342，第三电连接件343，接地件344，第一段3441，第二段3442，本体3401，第一部3402，第一延伸部3403，第二延伸部3404，第二部3405，绕组35，固定板36，第一通孔361，第二通孔362，第三通孔363，第四通孔364，
包塑体40，贯通孔41，转轴50，控制板60，接地部61，卡紧件70，卡紧本体71，过渡段72，卡紧凸台73，卡紧凹槽74。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。
如图1-图24所示，根据本申请实施例的电子水泵包括壳体10、端盖20、定子组件30、定子注塑体31、转子组件(未示出)、转轴50和控制板60。
壳体10内具有第一容纳腔101、第二容纳腔102和第三容纳腔103，第一容纳腔101环绕在第二容纳腔102的外侧，第二容纳腔102和第三容纳腔103在壳体10的轴向(图3中上下方向)上间隔布置，第二容纳腔102朝向背离第三容纳腔103的方向开口，第三容 纳腔103朝向背离第二容纳腔102的方向开口。
如图3所示，第二容纳腔102位于壳体10的中心处，且第二容纳腔102沿上下方向延伸，第一容纳腔101环设在第二容纳腔102外周，且第一容纳腔101与第二容纳腔102同向延伸，第二容纳腔102与第一容纳腔101在壳体10的径向上间隔开。第三容纳腔103间隔形成在第二容纳腔102的下方。
壳体10包括顶壁105、底壁104、外周壁107和内周壁106，顶壁105、底壁104、外周壁107和内周壁106围成第一容纳腔101，内周壁106和底壁104围成第二容纳腔102，底壁104和外周壁107围成第三容纳腔103。
如图3所示，底壁104在上下方向上间隔第一容纳腔101和第三容纳腔103，且底壁104在上下方向上间隔第二容纳腔102和第三容纳腔103。。
端盖20设在壳体10的一端(如图7中壳体10的下端)以封闭第三容纳腔103。如图7所示，端盖20具有朝向壳体10(图7中向上)开口的第四容纳腔201，第四容纳腔201与第三容纳腔103连通。
如图2所示，定子注塑体31在第一容纳腔101内，定子注塑体31包覆一部分定子组件30，即定子组件30的一部分和定子注塑体31设在第一容纳腔101内。具体地，定子注塑体31一次注塑形成以包覆一部分定子组件30，壳体10二次注塑形成以包覆定子注塑体31。换言之，电子水泵包括两次注塑过程，其中第一次注塑过程是形成定子注塑体31以包覆一部分定子组件30，第二次注塑过程是形成壳体10以包覆定子注塑体31。
转子组件设在第二容纳腔102内，转轴50在其轴向上的一端(如图3中转轴50的下端)穿过转子组件与底壁104相连。
控制板60位于第三容纳腔103内或端盖20内，定子组件30的另一部分穿出底壁104以与控制板60相连。优选地，控制板60设在第四容纳腔201内，定子组件20的另一部分穿出第一容纳腔101经过第三容纳腔103伸入第四容纳腔104内以与控制板60相连。
根据本申请实施例的电子水泵包括两次注塑过程，通过定子注塑体一次注塑形成以至少部分包覆定子组件，壳体二次注塑形成以包覆定子注塑体，且壳体具有容纳至少部分定子组件的第一容纳腔、容纳转子组件的第二容纳腔以及与第一容纳腔和第二容纳腔通过底壁间隔开的第三容纳腔，利用上述两次注塑成型的方式，既可以保证机壳注塑体的强度，也可以节省材料成本，而且定子注塑体的体积可以较小，注塑成型时间缩短，注塑时，可以避免对定子注塑体内部的绕组等部件造成损坏，从而确保电子水泵的性能可靠性使用寿命长，性能高，体积小，成本低。
在一些实施例中，底壁104的背离第一容纳腔101和第二容纳腔102的侧面(如图1中底壁104的下侧面)形成第三容纳腔103的底壁面，第三容纳腔103的底壁面包括第一 部1041和第二部1042，其中，第一部1041与第一容纳腔101在壳体10的轴向(图1中的上下方向)上相对，第二部1042与第二容纳腔102在壳体10的轴向上相对。
底壁104设有环形槽1043，环形槽1043从第三容纳腔103的底壁面朝向第一容纳腔101凹入，且环形槽1043的至少部分位于第一部1041。
如图2和图3所示，底壁104上设有环形槽1043，环形槽1043可以整体设在第一部1041内，也可以部分设在第一部1041内，另一部份设在第二部1042内。由此可以保证环形槽1043与第一容纳腔101的下侧面之间存在节流间隙，以调整流入第一容纳腔101外周的物料流量。
环形槽1043形成在第一部1041上且朝向上方凹陷，环形槽1043的底壁与第一容纳腔101的下侧面之间具有间隙。
需要说明的是，在该技术方案中，浇注口可以根据环形槽1043的设置位置合理设置，以满足填充物料流向第一容纳腔101的外周时，填充物料适于流经环形槽1043的底壁与第一容纳腔101的下侧面之间的间隙。优选地，浇注口设置在第二部1042且位于第二部1042的中心处。
在电子水泵的常规设计中，当注塑形成在第一容纳腔与第二容纳腔之间的部分壳体壁厚较小时，电机气隙小，电机效率高，但是由于第一容纳腔与第二容纳腔之间的间隙较小，在注塑时，该间隙对物料在其内的流动具有较大阻力，导致出现物料容易填充不足的问题，另外，由于物料在第一容纳腔与第二容纳腔之间的间隙内流速小，填充时间较长，物料最终容易在该间隙内汇集并形成熔接痕，导致壳体强度下降。
根据本申请实施例的壳体，由于在对壳体径向注塑成形过程中，浇筑口大体对应第三容纳腔的底壁面的中心位置，通过在底壁上设置环形槽，底壁在环形槽处的壁厚减小，注塑过程中该处对应位置的间隙小，增大了物料流动阻力，以对流向第一容纳腔外周的填充物料进行节流，从而使填充物料优先填充在第一容纳腔与第二容纳腔之间的间隔空间内，既可以避免物料在第一容纳腔与第二容纳腔之间的间隙内填充不良，又可以避免在该间隔空间内形成熔接痕，进而提高壳体的强度及电子水泵的性能。
在一些实施例中，底壁104包括围成环形槽1043的周壁面，周壁面包括在壳体10的径向上间隔布置的第一壁面(如图3所示的环形槽1043的内壁面)和第二壁面(如图3所示的环形槽1043的外壁面)，第一壁面和第二壁面均为环形面，在正交于壳体10的轴向的投影面上，第一壁面的投影位于第二壁面的投影内，第二壁面位于第一部1041，第一壁面位于第一部1041或第二部1042。如图3和图25所示，环形槽1043的外壁面位于第一部1041，环形槽1043的内壁面可以位于第一部1041(如图3所示)，环形槽1043的内壁面也可以位于第二部1042(如图25所示)。
可以理解的是，第一壁面与第二壁面之间的环形间隔空间即为环形槽1043，第一壁面和第二壁面均位于第一部时，则环形槽的整体都位于第一部，第一壁面位于第二部，第二壁面位于第一部时，则环形槽1043的一部分位于第一部，环形槽的另一部分位于第二部。由此，在该技术方案下，可以保证至少部分环形槽位于第一部，从而使环形槽与第一容纳腔的下侧面之间存在节流间隙。
进一步地，如图3、图6和图25-图29所示，顶壁105的壁厚为d1，内周壁106的壁厚为d2，外周壁107的壁厚为d3，且d2＜d1，d2＜d3。换言之，内周壁106较薄，从而可以提高电机效率，顶壁105和外周壁107较厚，从而可以提高壳体10的结构强度。
其中，在图3、图6和图25所示的实施例中，环形槽1043的底面与第一容纳腔101的底壁面在壳体10的上下方向上的距离为d4，且d4＜d2。可以理解的是，在内周壁106和外周壁107形成的过程中，从浇口注入的物料一部分朝向第一容纳腔101与第二容纳腔102之间流动以形成内周壁106，另一部分物料流过环形槽1043的底面与第一容纳腔101的底壁面之间的间隙，以朝向第一容纳腔101的外周流动并形成外周壁107。
由此，通过设置d4＜d2，可以使环形槽的底面与第一容纳腔的底壁面之间的间隙阻力大于第一容纳腔与第二容纳腔之间的间隙阻力，从而使物料优先朝向第一容纳腔与第二容纳腔之间的间隙流动，以形成能够完全填充该间隙的内周壁，且物料能够较快的流过该间隙，以使物料不会在该间隙内汇合，从而避免熔接头形成在内周壁上。
环形槽1043的底面与第一容纳腔101的底壁面在壳体10的长度方向上的距离为d4，且0.6＜d4/d2＜0.1。
发明人发现，在该技术方案下，d4/d2过大时，则环形槽1043的阻流效果下降，物料不能有效填充壳体内圆(即形成内周壁的填充物料不足)，导致壳体气密不良，进而影响水泵电机性能，d4/d2过小时，物料流量不足，会造成产品外圆欠注(即形成外周壁的填充物料不足)，且壳体在环形槽处的壁厚较薄，难以保证壳体的强度。针对上述技术问题，在该技术方案中，通过设置0.6＜d4/d2＜0.1，既可以调节物料流动趋势以优先形成内周壁，又可以保证壳体的强度。
进一步地，填充物料适于经环形槽与第一容纳腔下侧面之间的间隙流入第一容纳腔的外周以形成外周壁，可以理解的是，d4与d3的大小关系会影响外周壁的形成，发明人发现，当d4/d3小于0.2，环形槽相对阻流作用过大，形成外周壁的填充物料不足，且壳体在环形槽处的壁厚较薄，壳体的强度较低，当d4/d3大于0.5时，环形槽相对阻流作用过小，形成内周壁的填出物料不足，且物流在第一容纳腔与第二容纳腔之间流动较慢，导致熔接痕形成在内周壁上，导致内周壁结构强度差且气密性下降。由此，满足0.1＜d4/d3＜0.3时，注塑效果好，壳体强度高。
另外，发明人还发现，d4/d1过小时，填充物料优先经第一容纳腔与第二容纳腔之间的间隙流向第一容纳腔的上方，且物料填充形成顶壁的速度大于外周壁形成的速度，物料最终会汇集在第一容纳腔的外周，从而导致熔接痕形成在外周壁上，影响壳体外观。
d4/d1过大时，环形槽的阻流效果下降，填充物料优先经第一容纳腔的外周流向第一容纳腔的上方，且物料填充形成顶壁的速度大于内周壁形成的速度，物料最终会汇集在第一容纳腔与第二容纳腔之间，导致熔接痕形成在内周壁上，影响内周壁的结构强度。针对上述问题，当0.3＜d4/d1＜0.5，既可以调节物料流动趋势以优先形成内周壁，又可以使熔接痕形成在顶壁上，不影响壳体的外观。
由此可知d4不能太小，d4太小时，虽然阻流效果好，但外周壁填充过慢，最后熔接痕形成于外周壁，影响壳体外观和强度，d4也不能太大，d4太大时，阻流效果不够明显，外周壁填充快，内周壁填充慢，易在内周壁处形成熔接痕，甚至填充不满。
可以理解的是，本申请的环形槽1043并不限于至少部分位于第一部1041的形式，例如在另一些实施例中，环形槽1043位于第二部1042。
在如图26和图27所示的实施例中，环形槽1043设在底壁104的第二部1042上且在壳体10的径向上邻近第一容纳腔101设置，环形槽1043的底面在上下方向上高于第一容纳腔101的底壁面。由于环形槽1043的底面与第一容纳腔101的内壁面在内外方向上间隔开以形成间隙通道，通过浇筑口流入的填充物料从内向外流动时，填充物料适于流经该间隙通道。可以理解的是，在设置环形槽1043时，不限于构造环形槽1043的底面在上下方向上高于第一容纳腔101的底壁面，例如，环形槽1043的底面与第一容纳腔101的底壁面平齐时，环形槽1043阻流效果不变。
发明人发现，通过设置环形槽1043的外壁面与第一容纳腔101的内壁面之间的距离d5小于内周壁的厚度d2，填充物料在该间隙通道内的流动阻力大于物料在第一容纳腔101与第二容纳腔102之间的流动阻力，从而可以使填充物料优先填充在第一容纳腔101与第二容纳腔101之间的间隔空间内。
优选地，0.6＜d5/d2＜1时，阻流效果更好。发明人发现，在该技术方案下，d5/d2过大时，则环形槽1043的阻流效果下降，物料不能有效填充壳体内圆(即形成内周壁的填充物料不足)，导致壳体气密不良，进而影响水泵电机性能，d5/d2过小时，物料流量不足，会造成产品外圆欠注(即形成外周壁的填充物料不足)，且壳体在环形槽处的壁厚较薄，难以保证壳体的强度。针对上述技术问题，在该技术方案中，通过设置0.6＜d5/d2＜0.1，既可以调节物料流动趋势以优先形成内周壁，又可以保证壳体的强度。
另外，d5与外周壁107的壁厚d3的相对关系也会影响到环形槽1043的阻流效果。进一步地，当满足0.2＜d5/d3＜0.5时，阻流效果较佳。
进一步地，填充物料适于经环形槽1043的外壁面与第一容纳腔101的内壁面之间的间隙流入第一容纳腔的外周以形成外周壁，可以理解的是，d5与d3的大小关系会影响外周壁的形成，发明人发现，当d5/d3小于0.2，环形槽相对阻流作用过大，形成外周壁的填充物料不足，且壳体在环形槽处的壁厚较薄，壳体的强度较低，当d5/d3大于0.5时，环形槽相对阻流作用过小，形成内周壁的填出物料不足，且物流在第一容纳腔与第二容纳腔之间流动较慢，导致熔接痕形成在内周壁上，导致内周壁结构强度差且气密性下降。由此，满足0.1＜d5/d3＜0.3时，注塑效果好，壳体强度高。
可以理解的是，环形槽1043的设置不限于如图26和图27所示的形式，例如，在图28和图29所示的实施例中，环形槽1043的底面在上下方向上低于第一容纳腔101的底壁面，环形槽1043大体位于第一容纳腔101的斜下方，第一容纳腔101的内壁面和第一容纳腔101的底面的连接处与环形槽1043的外壁面和环形槽1043的底面的连接处之间形成间隙通道，填充物料流向第一容纳腔101的外周时，填充物料适于流经该间隙通道。
发明人发现，通过设置第一容纳腔的内壁面和第一容纳腔的底面的连接处与环形槽的外壁面和环形槽的底面的连接处之间的距离d6小于等于内周壁的厚度d2，则物料在该间隙通道内的流动阻力大于物料在第一容纳腔与第二容纳腔之间的流动阻力，从而可以使填充物料优先填充在第一容纳腔与第二容纳腔之间的间隔空间内。
进一步地，0.6＜d6/d2＜1，环形槽阻流效果好。发明人发现，在该技术方案下，d6/d2过大时，则环形槽1043的阻流效果下降，物料不能有效填充壳体内圆(即形成内周壁的填充物料不足)，导致壳体气密不良，进而影响水泵电机性能，d6/d2过小时，物料流量不足，会造成产品外圆欠注(即形成外周壁的填充物料不足)，且壳体在环形槽处的壁厚较薄，难以保证壳体的强度。针对上述技术问题，在该技术方案中，通过设置0.6＜d6/d2＜0.1，既可以调节物料流动趋势以优先形成内周壁，又可以保证壳体的强度。
发明人经过研究发现，d6与外周壁107的壁厚d3的相对关系也会影响到环形槽1043的阻流效果。进一步地，0.2＜d6/d3＜0.5，阻流效果较佳。
进一步地，填充物料适于经第一容纳腔的内壁面和第一容纳腔的底面的连接处与环形槽的外壁面和环形槽的底面的连接处之间的间隙流入第一容纳腔的外周以形成外周壁，可以理解的是，d6与d3的大小关系会影响外周壁的形成，发明人发现，当d6/d3小于0.2，环形槽相对阻流作用过大，形成外周壁的填充物料不足，且壳体在环形槽处的壁厚较薄，壳体的强度较低，当d6/d3大于0.5时，环形槽相对阻流作用过小，形成内周壁的填出物料不足，且物流在第一容纳腔与第二容纳腔之间流动较慢，导致熔接痕形成在内周壁上，导致内周壁结构强度差且气密性下降。由此，满足0.1＜d6/d3＜0.3时，注塑效果好，壳体强度高。
其中，根据本发明实施例中的电子水泵的壳体中环形槽1043为环形，对此，需要说明的是，环形槽1043中的环形应做广义理解，例如环形槽1043可以为一个完整(连续)的环形，也可以是多段弧形槽间隔布置，且多段弧形槽及其连接段围成的外周轮廓为环形。优选地，多段弧形槽之间的间距小于等于内周壁106的厚度d2。
在一些实施例中，如图16所示，定子注塑体31在其轴向(图16所示的上下方向)上的第一端设有定位孔311，定位孔311从定子注塑体31的第一端面(如图16中定子注塑体31的上端面)向定子注塑体31的第二端(如图16中定子注塑体31的下端)延伸。
定位孔311包括沿其延伸方向依次布置的第一段3111和第二段3112，第一段3111的横截面积沿定位孔311的延伸方向逐渐减小，第二段3112的横截面积沿定位孔311的延伸方向不变。
如图17所示，顶壁105设有配合部1051，顶壁105包括邻近底壁104的第一侧面(如图17中顶壁105的下侧面)，配合部1051从该第一侧面朝向底壁104凸出。配合部1051包括沿其凸出方向(如图17中的上下方向)依次布置的第一配合部1052和第二配合部1053，第一配合部1052配合在第一段3111内，第二配合部1053配合在第二段3112内。第一配合部1052的横截面积沿配合部1051的凸出方向逐渐减小，第二配合部1053的横截面积沿配合部1051的凸出方向不变。
根据本发明实施例的电子水泵，在对壳体注塑体进行二次注塑时，当与定位孔311大小相匹配的嵌件进入定位孔311后，通过嵌件和定位孔311，能够完成定位。在二次注塑过程中，由于第一段3111的第一端横截面积大于第一段3111第二端的横截面积，二次注塑物料流入第一段3111中，当二次物料填满第一段3111后，嵌件开始退出第二段3112，当嵌件完全退出第二段3112时，第一段3111中的二次注塑物料自然流入定位件的第二段3112中，有效防止空气进入定位孔311的第二段3112中，避免二次注塑物料在凝结时凝结不均匀以产生细微裂缝以增加壳体10的使用寿命。
在一些实施例中，如图16和图17所示，第一段3111为圆锥孔，第二段3112为圆孔，第一配合部1052的横截面的外周轮廓和第二配合部1053的横截面的外周轮廓均为圆形。
根据本申请实施例的电子水泵，根据嵌件形状，第一段3111和第二段3112还能为截面大小不同的方孔或其他形状的孔，第一配合部1052和第二配合部1053为与第一段3111和第二段3112相结合的长方体或其他形状立体。优选地，第一段3111为圆锥孔，第二段3112为圆孔，第一配合部1052的横截面的外周轮廓和第二配合部1053的横截面的外周轮廓均为圆形，当第一段3111为圆锥孔，第二段3112为圆孔时，第一段3111和第二段3112加工简单且能够使二次物料从第一段3111流入第二段3112时更加流畅。
在一些实施例中，如图16和图17所示，定位孔311为多个，其中一个定位孔311的 第二段3112的横截面积与其余定位孔311的第二段3112的横截面积不同。
根据本申请实施例的电子水泵，其中一个定位孔的第二段的横截面积与其余定位孔的第二段的横截面积不同，能够用于周向角度定位，防止壳体10的注塑体二次注塑时注塑错误。
在一些实施例中，如图18所示，定子注塑体31的内周面设有沿定子注塑体31的轴向延伸的第一凹槽312，内周壁106的外周面设有沿壳体10的轴向延伸的凸起1061，凸起1061配合在第一凹槽312内。
根据本申请实施例的电子水泵，在二次注塑壳体10时，二次注塑物料沿着定子注塑体31内周面的第一凹槽312流动时，第一凹槽312能够增加二次注塑物料在定子注塑体31内周面的横截面积，进而降低二次注塑物料在定子注塑体31内周面的流动速度、降低二次注塑物料在定子注塑体31内周面的注塑压力的损失和降低二次注塑物料的剪切应力，改善二次注塑物料在产品内圆处的内应力，从而降低二次注塑体在内圆位置因较大应力残余而导致的变形风险。
同时，由于第一凹槽312使得二次注塑物料与定子注塑体31内周面的接触面积增大，在二次注塑时，壳体10的内周壁106的外周面上形成与定子注塑体31内周面上的第一凹槽312相对应的凸起1061，加强了壳体10和定子注塑体31的连接强度的同时增加了壳体10在第一凹槽312处的厚度，增加了壳体10整体强度，而且二次注塑物料在第一凹槽312内流动时，第一凹槽312内的二次注塑物料冷却速度慢，能够保证二次注塑物料注塑效果，防止在二次注塑过程中出现欠注的情况。
在一些实施例中，如图18所示，第一凹槽312为多个，多个第一凹槽312沿定子注塑体31的周向间隔布置，凸起1061为多个，多个凸起1061沿壳体10的周向间隔布置，多个凸起1061一一对应地配合在多个第一凹槽312内。
根据本申请实施例的电子水泵，通过设置多个第一凹槽和凸起能够进一步增强第一凹槽处的厚度，增加了定子注塑体与壳体的连接强度，进而增加整体强度，增强产品使用寿命。
在一些实施例中，如图12-图20所示，定子组件30包括定子铁芯32、绝缘框架33、插针34、绕组35和固定板36。
绝缘框架33设在定子铁芯32的轴向(如图12中上下方向)上的端部，定子铁芯32的上端和下端均设有绝缘框架33。
多个插针34间隔布置，多个插针34中的至少部分插针34的一端与绝缘框架33相连，每个插针34的下端与定子铁芯32的上端的绝缘框架33连接。
绕组35缠绕于定子铁芯32的齿部，绕组35的引出线与插针34相连，定子注塑体31 包覆插针34的一端、绕组35、绝缘框架33和定子铁芯32。
固定板36设在绝缘骨架33的远离定子铁芯32的一侧，固定板36的一部分位于壳体10内，固定板36的另一部分位于定子注塑体31内，多个插针34的另一端穿过定子注塑体31、固定板36和底壁104与控制板60相连。
根据本申请实施例的电子水泵，通过定子注塑体31将定子铁芯32、绝缘框架33、绕组35和多个插针34，能够增强插针34与绝缘框架33的连接强度，进而增强绕组35与插针34连接的稳定性，并且能够对二次注塑体内部的定子组件30进行保护，防止在二次注塑过程中，壳体10成型时，插针34因受到冲击发生形变、歪斜等现象。
在一些实施例中，定子铁芯32的外周面设有第二凹槽(未示出)，多个插针34中一个插针34的一端配合在第二凹槽内。
根据本申请实施例的电子水泵，通过第二凹槽与上述一个插针34配合，使该插针34通过第二凹槽接地连接，在同时通过第二凹槽和定子注塑体31能够对接地的插针34进行支撑，增强插针34的稳定性，防止插针34发生变形。
优选地，定子注塑体31的材料为热固性材料，绝缘框架33的材料和固定板36的材料为热塑性塑料，热固性材料的固化温度低于热塑性材料的软化温度，热固性材料的热分解温度大于壳体10的注塑温度。采用固化温度低于热塑性材料的软化温度的热固性材料，注塑时不会对定子注塑体31内部的绕组35等部件造成损坏，从而确保电子水泵的性能可靠性。电子水泵的壳体强度以及耐候性要求较高，生产中往往采用高强度的工程塑料，而高强度的工程塑料往往具有高的成型温度且成本高。利用二次注塑成型方式，一次包塑定子组件100的定子注塑体31和二次注塑壳体组件的壳体10就可以采用不同塑料成型，壳体10要求的强度高、耐候性好，可以采用成本较高的热塑性工程塑料，而定子注塑体31要求的强度低，则可以采用成本较低的热固性塑料，这样的方式既保证了壳体10的强度，又节省了材料成本。
具体地，如图12和图13所示，定子铁芯32、绝缘框架33、绕组35、定子注塑体31和固定板36设在壳体10内部，插针34的一部分位于壳体10的内部。
发明人经过研究发现，电子水泵在制作过程中进行两次注塑，一次注塑是形成定子注塑体，二次注塑是形成壳体，且至少部分插针与绕组的引出线是焊接在一起的，在进行二次注塑形成壳体的过程中，高温高压的注塑料容易对插针以及插针和绕组的焊点进行冲击，插针容易变形，且容易造成插针与绕组虚焊和断路的问题，为此，本申请通过设置固定板，固定板可以对插针进行固定，避免插针变形，而且，固定板还可以使得注塑料在流动受到影响，避免注塑料对插针和绕组的焊点进行正面冲击，避免了插针与绕组虚焊和断路的问题，提高了插针和绕组连接可靠性。
根据本申请的实施例的电子水泵，将插针通过固定板与绝缘框架的配合，固定板能够对插针进行一定支撑与固定，使多个插针能够稳固地与绝缘框架连接，进而增强插针与绝缘框架之间的连接强度，避免插针变形。
在生产流程中固定板能够对插针的位置进行限定，进而能够有效的保护插针与绕组之间的焊点，避免在对注塑体进行注塑时，因高温高压对插针与绕组的焊点产生的冲击造成虚焊和断路问题。
在入模时，由于插针被固定板固定，插针能够辅助注塑体在模具内与相对应位置的嵌件快速定位，避免壳体而成成型时，胶料在插针附近溢料、形成余料毛刺，能够有效提高生产效率，降低产品不良率。
在一些实施例中，如图12-图15所示，固定板36具有多个通孔，多个通孔36沿其固定板36的厚度方向贯通固定板36的。多个通孔包括第一通孔361、第二通孔362、第三通孔363和第四通孔364。多个插针34包括第一电连接件341、第二电连接件342、第三电连接件343和接地件344。第一电连接件341通过第一通孔361穿过固定板36，第二电连接件342通过第二通孔362穿过固定板36，第三电连接件343通过第三通孔363穿过固定板36，接地件344通过第四通孔364穿过固定板36。
具体的，如图12所示的实施例中，固定板36上设置3个插针34，3个插针34分别与第一通孔361、第二通孔362和第三通孔363一一对应且该3个插针34均为相插针。
具体的，如图13所示的实施例中，固定板36上设置4个插针34，4个插针34分别与第一通孔361、第二通孔362、第三通孔363和第四通孔364一一对应，且其中3个插针34为相插针，一个插针34接地插针。
根据本申请的实施例的电子水泵，通过将固定板36大体设置为弧形板，弧形板的弧形曲线的曲率与绕组的曲线曲率相同，使插针34与固定板36之间的配合更加便捷的同时，使得插针34与固定板36之间的配合稳定，避免插针变形且能够减小在定子注塑体注塑时，产生的压强和冲击，避免虚焊和断路的产生。
在一些实施例中，固定板36包括本体和在本体上向上凸出的第一凸台，第一通孔361、第二通孔362、第三通孔363从第一凸台的上表面向下贯通第一凸台和本体。
具体地，第一凸台包括三个间隔布置的圆台部和连接在相邻圆台部之间的连接部。三个圆台部分别为第一圆台部2621、第二圆台部2622和第三圆台部2623。连接部为两个，且两个连接部分别为第一连接部2624和第二连接部2625，第一连接部2624连接第一圆台部2621和第二圆台部2622，第二连接部2625连接第二圆台部2622和第三圆台部2623。
第一通孔361贯穿第一圆台部和本体，第二通孔362贯通第二圆台部和本体，第三通孔363贯通第三圆台部和本体。
本申请的实施例的电子水泵通过在固定板36上设置第一凸台，能够加强固定板36与插针34之间连接的稳定性，同时由于第一凸台的设置，能够在一定程度上，保护本体，增加固定板36的使用寿命，通过设置连接部，增强了圆台部的整体强度，从而进一步加强了固定板36的整体强度，增加产品的使用寿命。
在一些实施例中，本体大体为弧形板，多个圆台部沿本体的长度方向间隔布置，连接部大体沿本体的长度方向延伸。
根据本申请的实施例的电子水泵，通过将本体大体设置为弧形板，弧形板的弧形曲线的曲率与绕组的曲线曲率相同，使插针34与固定板36之间的配合更加便捷的同时，使得插针34与固定板36之间的配合稳定，避免插针变形且能够减小在定子注塑体注塑时，产生的压强和冲击，避免虚焊和断路的产生。
进一步地，本体包括在其长度方向上相对布置的第一端面和第二端面，本体包括在其宽度方向上相对布置的第一侧面和第二侧面，本体的第一侧面设有凸出部，凸出部邻近本体的第一端面。
固定板36还包括与第一凸台间隔布置的第二凸台，第二凸台与本体和凸出部相连，第四通孔364贯穿第二凸台以及本体和/或凸出部。具体地，第二凸台设在本体和凸出部的连接处，第四通孔贯通第二凸台以及本体和凸出部的连接处。可以理解的是，本申请并不限于此，例如第二凸台设在凸出部，第四通孔364贯通第二凸台和凸出部；还例如第二凸台设在本体，第四通孔364贯通第二凸台和本体。
优选地，第二凸台的外周轮廓为圆形，且第二凸台为一个。由此，本申请的实施例的电子水泵通过第一凸台对本体进行保护的同时，加强靠近第二端面的相插针与固定板36之间连接的稳定性，通过第二凸台对靠近第二端面的本体和/或凸出部进行保护的同时，加强接地插针与固定板36之间连接的稳定性。
在一些实施例中，如图4-图11所示，控制板60具有接地部61，接地部61与端盖20抵接，端盖20为导体，定子铁芯32的外周面设有安装部，接地件344在其延伸方向上的第一端(如图4中接地件344的上端)与安装部相连，接地件344在其延伸方向上的第二端(如图4中接地件344的下端)与控制板60相连。具体地，接地件344的第二端与接地部61间隔布置且通过控制板60上的电路相连。
具体地，端盖20和接地件344均由导体材料制成，端盖20设在壳体10的端部，控制板60设在第四容纳腔201内，换言之，控制板60设在端盖20的内侧。控制板60具有接地部61，且接地部61与端盖20抵接。通过接地部61与端盖20抵接使得控制板60与端盖20之间可以导通电流。
当电子水泵出现漏电故障时，绕组35内的电流可以依次流过定子铁芯32、接地件344、 控制板60和端盖20，最后经由连接于端盖20的接地线导入至大地，以实现对电子水泵的接地保护。另一方面，本申请实施例的电子水泵，通过上述接地方式实现接地所需的零部件较少，安装方便，并且安装可靠不易脱落，提高了电子水泵工作时的可靠性。
在一些实施例中，如图9所示，接地件344包括沿其延伸方向依次相连的第一段3441和第二段3442，第一段3441与安装部相连，第二段3442与接地部61相连，第二段3442的横截面积小于第一段3441的横截面积。
优选地，第二段3442的横截面积小于第一段3441的横截面积，从而方便操作人员将接地件344插入控制板60内，从而对第二段3442进行焊接固定。
在一些实施例中，如图4所示，第二段3442远离第一段3441的端面(如图4所示的第二段3442的下端面)与控制板60的邻近端盖20的一侧面(如图4所示的控制板60的下表面)间隔开。
优选地，第二段3442远离第一段3441的端面与控制板60的邻近端盖20的一侧面之间的距离大于或等于0.5mm。由此，本申请的实施例可以避免第二段3442的下端面紧贴控制板60，而造成焊锡不能全部浸入至第二段3442的插接孔内，导致焊接不牢固的问题。
接地件344的下端与接地部61间隔布置且通过控制板60上的电路相连。换言之，接地件344与控制板60相连的一端未直接与接地部61连接，接地件344与控制板60相连的一端和接地部61通过控制板60上的电路连通。由此，本申请的实施例可以一定程度上减少电子水泵工作时的电磁干扰，并且方便技术人员对控制板60上的电路进行布局规划，提高了电子水泵内部的空间利用率。
在一些实施例中，接地部61设有为导体的弹片(未示出)，接地部61通过弹片与端盖20抵接。优选地，弹片具有弹性且弹片由导体材料制成。在定子组件30在转动的过程中，即使出现轻微的振动，接地部61与端盖20之间仍可以保持接触。
进一步地，如图11所示，端盖20邻近控制板60的内侧面设有接地凸台21，接地凸台21与弹片抵接，以方便控制板60与端盖20相互导通。
优选地，端盖20邻近控制板60的一端(如图11所示端盖20的上端)的周向设有向外延伸的凸缘22，凸缘22的外沿设有多个凸耳221，凸耳221沿凸缘22的周向间隔布置，多个凸耳221上均设有第一螺纹孔，壳体10上设有与凸耳221上的第一螺纹孔对应的第二螺纹孔，紧固件穿过第一螺纹孔和第二螺纹孔连接壳体10和凸耳221。为了提高电子水泵的密封性能，可以在凸缘22与壳体10的连接处设置密封垫，或者填充密封胶，以提高端盖20与壳体10连接处的防尘和防水性能。
优选地，如图7和图10所示，插针34沿定子铁芯32的轴向延伸，且插针34从壳体10内伸入端盖20内，插针34在其延伸方向上的上端与绝缘框架33配合，插针34在其延 伸方向上的下端与控制板60相连。绕组35缠绕在定子铁芯32的齿部上，且绕组35的引出线与插针34相连。换言之，绕组35的三相引出线分别与三个插针34相连，并通过这三个插针34与控制板60相连。
插针34包括本体3401、第一部3402、第一延伸部3403、第二延伸部3404和第二部3405。其中，本体3401沿定子铁芯32的轴向延伸，本体3401的上端与第一部3402相连，本体3401的下端与控制板60相连。第一延伸部3403和第二延伸部3404均从第一部3402的上端面沿远离本体3401的方向延伸，第一延伸部3403和第二延伸部3404间隔布置且与绝缘框架33配合。
在一些实施例中，如图19-图24所示，电子水泵还包括包塑体40，包塑体40包覆在插针34的一部分的外周，包塑体40与底壁104的远离定子组件30的侧面相连，且包塑体40与控制板60在壳体10的轴向上间隔开，壳体10和包塑体40一体注塑形成。
发明人经过研究发现，插针34在壳体10中外露长度较长，插针34外露部分无支撑，容易在后续周转运输以及上线装配过程中容易发生变形。为此，根据本申请的实施例，通过将包塑体40设在插针34的外周，且包塑体40与底壁104的上表面相连的方式固定插针34，一方面，包塑体40对插针34起固定支撑作用，可以减小插针34在加工、转运、装配过程中变形或损坏的概率。另一方面，包塑体40与控制板60在壳体10的轴向上间隔开，可以避免包塑体40与控制板60之间形成干涉，且方便操作人员将插针34焊接到控制板60上，提高产品的焊接效果。
发明人经过研究发现，壳体10和包塑体40注塑成型时，插针34上的包塑体40的形状在模具部成型，模具上开设相应形状的类似喇叭口式结构，这种结构有利于在合模过程中对插针34进行导向、整形和固定，防止插针34变形，并保证定子组件30在壳体10内的周向上定位精度。
在一些实施例中，包塑体40具有贯通孔41，插针34的一部分配合在贯通孔41内，贯通孔41的内壁面与包塑体40的外周面之间的距离大于0毫米小于等于5毫米。
如图19和图20所示，贯通孔41沿包塑体40的轴向贯穿包塑体40的上下两端，并且贯通孔41贯穿底壁104的上下表面，以供插针34穿过。插针34的下端插入至贯通孔41内部且向下穿出底壁101。
在一些实施例中，包塑体40的邻近控制板60的端面与控制板60的邻近包塑体40的端面之间的距离之间的距离大于等于1毫米且小于等于3毫米。由此，本申请的实施例可以提高包塑体40与插针34和控制板60的连接强度，减少插针34在加工、转运、装配过程中变形或损坏的概率。
在一些具体实施例中，如图1-图24所示，包塑体40的外周轮廓可以为多边形、圆形 或椭圆形。换言之，包塑体40的横截面积可以为多边形、圆形或椭圆形。
可选地，包塑体40包括上端面和下端面，包塑体40的上端面的外周轮廓可以为多边形、圆形或椭圆形，包塑体40的下端面的外周轮廓可以为多边形、圆形或椭圆形。
包塑体40的横截面积沿朝向控制板60的方向逐渐减小，或者，包塑体40的横截面积沿壳体10的轴向不变。换言之，包塑体40的横截面积沿其轴向可以是恒定的也可以是变化的。优选地，包塑体40的横截面积沿朝向控制板60的方向逐渐减小，即通过上小下大的方式光滑均匀的过渡，使得包塑体40和控制板60的下端面形成一定的夹角。在对包塑体40进行注塑的工序中，通过采用这种结构的包塑体40，使得模具内可以形成类似喇叭状的模具腔，即倒锥形的模具腔。这种结构有利于在合模过程中对插针34进行导向、整形和固定，防止插针34变形，并保证定子组件30在壳体10内的周向上定位精度。
在一些实施例中，如图1-图6所示，，底壁104设有安装孔11，安装孔11从第二容纳腔102的底壁104面朝向第三容纳腔103延伸，轴底座12的至少部分设在安装孔11内，且轴底座12的横截面的外周轮廓为非圆形，轴底座12具有朝向第二容纳腔102的第一转轴孔13，转轴50在其轴向上的一端(如图3中转轴50的下端)穿过转子组件配合在第一转轴孔13内以与轴底座12相连。换言之，轴底座12与壳体10为一体件。具体地，将注塑料通入相应的注塑模具内即可注塑形成轴底座12与壳体10。
可以理解的是，根据本申请实施例的电子水泵在制作过程中具有两次注塑过程，一次注塑过程是注塑形成定子注塑体以包覆定子组件30，二次注塑过程是将壳体10和轴底座12注塑成一体件以包覆定子注塑体31。
轴底座12的横截面具有非圆形的外周轮廓，如图2所示轴底座12具有沿壳体11的轴向(图1中的上下方向)延伸的第一转轴孔13。具体地，如图1所示，第一转轴孔13沿上下方向贯穿轴底座12。
转轴50在其轴向上的下端配合在第一转轴孔13内以连接转轴50与轴底座12。其中转轴50与轴底座12之间不能相对转动。具体地，转轴50与第一转轴孔13过盈配合以防止转轴50与轴底座12之间转动，可以理解的是，本申请中转轴50与轴底座12的配合方式并不限于此，例如转轴50与轴底座12焊接等其他紧固连接，以防止二者之间转动。可以理解的是，轴底座12用于安装转轴50以将转轴50连接在壳体11的底壁104上。
根据本申请实施例的电子水泵，通过轴底座连接转轴和壳体，且轴底座与壳体一体注塑形成，轴底座的横截面具有非圆形的外周轮廓，避免了转轴与壳体直接注塑成型以使金属结构件与非金属结构件直接接触及接触面积小的问题，且转轴不易转动及脱落，延长了壳体组件和电子水泵的使用寿命。
本申请实施例的电子水泵，将定子注塑体一次注塑而成，再将壳体组件二次注塑成型， 与转子实现自密封作用，省去了定子组件和转子气隙间的隔离套，降低了壳体组件的材料成本，同时简化了电子水泵的装配工艺，并使得定子组件的刚度提升，有利于电子水泵噪音的改善，提高了电子水泵运行的可靠性。
优选地，轴底座12的下端面设有多个凸部14，多个凸部14沿轴底座12的周向间隔布置在第一转轴孔13的外周。凸部14用于与壳体10上的凹部相配合。可以理解的是，本申请并不限于此，例如轴底座12的下端面设有多个凹部(未示出)，多个凹部沿轴底座12的周向间隔布置，凹部用于与壳体10上的凸部相配合。
轴底座12包括基体15和凸台16，基体15的一个端面(如图4-图5中基体15的下侧面)与底壁104相连，凸台16从基体15的另一个端面(如图4-图5中基体15的上侧面)向外凸出，且凸台16的外端面(如图4-图5中凸台16的上侧面)与底壁104在壳体11的轴向上间隔开，在正交于轴底座12的纵向的投影面上，基体15的外周轮廓为圆形，凸台16的外周轮廓为非圆形，且凸台16的外周轮廓的至少部分位于基体15的外周轮廓内。
可以理解的是，本申请并不限于在正交于轴底座12的纵向的投影面上，凸台16包括直边的形式。例如，对应直边的位置，还可以为弯曲段等其他形式。
在一些具体实施例中，如图23-24所示，电子水泵还包括卡紧件70，卡紧件70用于固定控制板60。
卡紧件70包括卡紧本体71、过渡段72和卡紧凸台73，过渡段72设在卡紧本体71，且过渡段72的横截面积小于卡紧本体71的横截面积。过渡段72设在卡紧本体71的端面上且过渡段72在正交于上下方向上的截面上面积小于卡紧本体71在正交于上下方向上的截面上的截面积。过渡段72穿过控制板60。
卡紧件70具有卡紧凹槽74，卡紧凹槽74沿上下方向依次贯穿卡紧凸台73和过渡段72延伸至卡紧本体71内，以使卡紧凹槽74在卡紧凸台73的上端面开口，且卡紧凹槽74在卡紧件70的外周面开口。
根据本申请的实施例的卡紧件，过渡段与卡紧凸台穿过控制板并且控制板被固定在卡紧凸台与卡紧本体之间，通过过渡段对控制板进行限位，通过卡紧凸台与卡紧本体对控制板实现固定，使控制板的安装更加稳定，有效保护控制板，延长了控制板的使用寿命。
在一些实施例中，控制板60邻近底壁104的端面与底壁104的邻近控制板60的侧面之间的距离为A，插针34的另一端(如图19中插针34的下端)通过焊锡与控制板60相连，焊锡凸出控制板60的邻近底壁104的端面的距离为B，插针34的另一端(如图19中插针34的上端)的端部与底壁104的邻近控制板60的侧面之间的距离为H，包塑体40在壳体10的轴向上的尺寸为h，且满足：
Figure PCTCN2020135040-appb-000002
其中W为插针的另一端的端部挠度，P为插针的另一端的端部所受载荷，E为弹性模量，I为截面惯矩。具体地，如图19-图20所示，插针34的横截面的外周轮廓为矩形，控制板60上开设有贯通孔，插针34的下端通过贯通孔穿过控制板60。
在插针34未焊接到贯通孔内时，插针34与贯通孔为间隙配合，即插针34能够在贯通孔内周向晃动，在插针34焊接到贯通孔内时，插针34为一端固定的悬臂梁结构。
悬臂梁挠度的计算公式为：W＝PL 3/(3EI)。其中悬臂梁的长度为L，即插针34伸出包塑体40且邻近控制板60的部分的长度为L，且L＝H-h。因此，L需满足：
Figure PCTCN2020135040-appb-000003
换言之，包塑体40在壳体10的轴向上的尺寸h至少需要满足：
Figure PCTCN2020135040-appb-000004
才能保证插针34在规定的挠度范围内，以保证插针34的强度。另一方面，包塑体40在壳体10的轴向上的尺寸h最大需要满足：h<A-B,即包塑体40在壳体10的轴向上的尺寸h最大不能超过焊锡凸出控制板60的邻近底壁104的端面至底壁104的上端面之间的距离，否则将影响插针34的正常装配和焊接。由此，发明人通过研究得出，包塑体40在壳体10的轴向上的尺寸h需满足：
Figure PCTCN2020135040-appb-000005
根据本申请的实施例的车辆包括上述实施例所述的电子水泵。其中，车辆可以为新能源车、燃油车等，其中新能源车包括纯电动车、增程式电动车、混合动力车、燃料电池电动车、氢发动机车等。
根据本申请的车辆可以减小了电子水泵在运行过程中的振动幅度，且转轴不易转动及脱落，延长了电子水泵的使用寿命，进而提高了车辆性能。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申 请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或彼此可通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本申请中，术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。

Claims (18)

  1. 一种电子水泵，其特征在于，包括：
    壳体，所述壳体内具有第一容纳腔、第二容纳腔和第三容纳腔，所述第一容纳腔环绕在所述第二容纳腔的外侧，所述第二容纳腔和所述第三容纳腔在所述壳体的轴向上间隔布置，所述第二容纳腔朝向背离所述第三容纳腔的方向开口，所述第三容纳腔朝向背离所述第二容纳腔的方向开口，所述壳体包括顶壁、底壁、外周壁和内周壁，所述顶壁、所述底壁、所述外周壁和所述内周壁围成所述第一容纳腔，所述内周壁和所述底壁围成所述第二容纳腔，所述底壁和所述外周壁围成所述第三容纳腔；
    端盖，所述端盖设在所述壳体的一端以封闭所述第三容纳腔；
    定子组件和定子注塑体，所述定子注塑体和所述定子组件的一部分设在所述第一容纳腔内，所述定子注塑体一次注塑形成以包覆一部分所述定子组件，所述壳体二次注塑形成以包覆所述定子注塑体；
    转子组件，所述转子组件设在所述第二容纳腔内；
    转轴，所述转轴在其轴向上的一端穿过所述转子组件与所述底壁相连；
    控制板，所述控制板位于所述第三容纳腔内或所述端盖内，所述定子组件的另一部分穿出所述底壁以与所述控制板相连。
  2. 根据权利要求1所述的电子水泵，其特征在于，所述第三容纳腔的底壁面包括与所述第一容纳腔在所述壳体的轴向上相对的第一部和与所述第二容纳腔在所述壳体的轴向上相对的第二部，所述底壁设有环形槽，所述环形槽从第三容纳腔的底壁面朝向所述第一容纳腔凹入，且所述环形槽的至少部分位于所述第一部。
  3. 根据权利要求2所述的电子水泵，其特征在于，所述底壁包括围成所述环形槽的周壁面，所述周壁面包括间隔布置的第一壁面和第二壁面，所述第一壁面和所述第二壁面均为环形，且在正交于所述壳体的轴向的投影面上，所述第一壁面的投影位于所述第二壁面的投影内，所述第一壁面位于所述第一部，所述第二壁面位于所述第一部或所述第二部。
  4. 根据权利要求1所述的电子水泵，其特征在于，所述定子注塑体在其轴向上的第一端设有定位孔，所述定位孔从所述定子注塑体的第一端面向所述定子注塑体的第二端延伸，所述定位孔包括沿其延伸方向依次布置的第一段和第二段，所述第一段的横截面积沿所述定位孔的延伸方向逐渐减小，所述第二段的横截面积沿所述定位孔的延伸方向不变；
    所述顶壁设有配合部，所述顶壁包括邻近所述底壁的第一侧面，所述配合部从所述第一侧面朝向所述底壁凸出，所述配合部包括沿其凸出方向依次布置的第一配合部和第二配合部，所述第一配合部配合在所述第一段内，所述第二配合部配合在所述第二段内，所述第一配合部的横截面积沿所述配合部的凸出方向逐渐减小，所述第二配合部的横截面积沿 所述配合部的凸出方向不变。
  5. 根据权利要求4所述的电子水泵，其特征在于，所述第一段为圆锥孔，所述第二段为圆孔，所述第一配合部的横截面的外周轮廓和所述第二配合部的横截面的外周轮廓均为圆形。
  6. 根据权利要求4所述的电子水泵，其特征在于，所述定位孔为多个，其中一个所述定位孔的第二段的横截面积与其余所述定位孔的第二段的横截面积不同。
  7. 根据权利要求1所述的电子水泵，其特征在于，所述定子注塑体的内周面设有沿所述定子注塑体的轴向延伸的第一凹槽，所述内周壁的外周面设有沿所述壳体的轴向延伸的凸起，所述凸起配合在所述第一凹槽内。
  8. 根据权利要求7所述的电子水泵，其特征在于，所述第一凹槽为多个，多个所述第一凹槽沿所述定子注塑体的周向间隔布置，所述凸起为多个，多个所述凸起沿所述壳体的周向间隔布置。
  9. 根据权利要求1-8中任一项所述的电子水泵，其特征在于，所述定子组件包括：
    定子铁芯；
    绝缘框架，所述绝缘框架设在所述定子铁芯的轴向上的端部；
    多个插针，多个所述插针间隔布置，多个所述插针中的至少部分插针的一端与所述绝缘框架相连；
    绕组，所述绕组缠绕于所述定子铁芯的齿部，所述绕组的引出线与所述插针相连，所述定子注塑体包覆所述插针的一端、所述绕组、所述绝缘框架和所述定子铁芯；
    固定板，所述固定板设在所述绝缘骨架的远离所述定子铁芯的一侧，所述固定板的一部分位于所述壳体内，所述固定板的另一部分位于所述定子注塑体内，多个所述插针的另一端穿过所述定子注塑体、所述固定板和所述底壁与所述控制板相连。
  10. 根据权利要求9所述的电子水泵，其特征在于，所述固定板具有多个沿其厚度方向贯通所述固定板的通孔，多个所述通孔包括第一通孔、第二通孔、第三通孔和第四通孔，多个所述插针包括第一电连接件、第二电连接件、第三电连接件和接地件，所述第一电连接件通过所述第一通孔穿过所述固定板，所述第二电连接件通过所述第二通孔穿过所述固定板，所述第三电连接件通过所述第三通孔穿过所述固定板，所述接地件通过所述第四通孔穿过所述固定板。
  11. 根据权利要求10所述的电子水泵，其特征在于，所述控制板具有接地部，所述接地部与所述端盖抵接，所述端盖为导体，所述定子铁芯的外周面设有安装部，所述接地件在其延伸方向上的第一端与所述安装部相连，所述接地件在其延伸方向上的第二端与所述控制板相连，所述接地件的第二端与所述接地部间隔布置且通过所述控制板上的电路相连。
  12. 根据权利要11所述的电子水泵，其特征在于，所述接地件包括沿其延伸方向依次布置的第一段和第二段，所述第一段与所述安装部相连，所述第二段与所述接地部相连，所述第二段的横截面积小于所述第一段的横截面积。
  13. 根据权利要求12所述的电子水泵，其特征在于，所述第二段的远离所述第一段的端面与所述控制板的邻近所述端盖的一侧面间隔开。
  14. 根据权利要求11所述的电子水泵，其特征在于，所述接地部设有为导体的弹片，所述接地部通过所述弹片与所述端盖抵接。
  15. 根据权利要求9所述的电子水泵，其特征在于，还包括包塑体，所述包塑体包覆在所述插针的一部分的外周，所述包塑体与所述底壁的远离所述定子组件的侧面相连，且所述包塑体与所述控制板在所述壳体的轴向上间隔开，所述壳体和所述包塑体一体注塑形成。
  16. 根据权利要求15所述的电子水泵，其特征在于，所述控制板邻近所述底壁的端面与所述底壁的邻近所述控制板的侧面之间的距离为A，所述插针的另一端通过焊锡与所述控制板相连，所述焊锡凸出所述控制板的邻近所述底壁的端面的距离为B，所述插针的另一端的端部与所述底壁的邻近所述控制板的侧面之间的距离为H，所述包塑体在所述壳体的轴向上的尺寸为h，且满足：
    Figure PCTCN2020135040-appb-100001
    其中W为所述插针的另一端的端部挠度，P为所述插针的另一端的端部所受载荷，E为弹性模量，I为截面惯矩。
  17. 根据权利要求1-16中任一项所述的电子水泵，其特征在于，所述底壁设有安装孔，所述安装孔从所述第二容纳腔的底壁面朝向所述第三容纳腔延伸，所述电子水泵还包括轴底座，所述轴底座的至少部分设在所述安装孔内，且所述轴底座的横截面的外周轮廓为非圆形，所述轴底座具有朝向所述第二容纳腔的第一孔，所述转轴在其轴向上的一端穿过所述转子组件配合在所述第一孔内以与所述轴底座相连，所述轴底座与所述壳体一体注塑形成。
  18. 一种车辆，其特征在于，包括如权利要求1-17中任一项所述的电子水泵。
PCT/CN2020/135040 2020-07-24 2020-12-09 电子水泵和车辆 WO2022016781A1 (zh)

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