Electronic water pump and vehicle having the same

Abstract

The present invention discloses an electronic water pump and a vehicle having the electronic water pump, wherein the electronic water pump comprises a housing, a stator assembly, a control panel and an end cover, wherein the end cover is arranged at the end of the housing, the control panel is arranged in the housing and adjacent to the end cover, or the control panel is arranged in the end cover, the control panel has a grounding portion, and the grounding portion abuts against the end cover, and the stator assembly comprises: a stator core and a grounding member, wherein the stator core is arranged in the housing, a mounting portion is arranged on the outer peripheral surface of the stator core, the grounding member extends along the axial direction of the stator core and extends from the housing into the end cover, the first end of the grounding member in the extension direction thereof is connected to the mounting portion, and the second end of the grounding member in the extension direction thereof is connected to the control panel. The grounding method of the electronic water pump of the present invention requires few parts and components, is easy to implement, can effectively reduce electromagnetic interference during operation, and the grounding member is reliably fixed and not easy to fall off.

Description

Technical Field

[0001] The present invention relates to the technical field of water pumps, and in particular to an electronic water pump and a vehicle having the electronic water pump. Background Art

[0002] Electronic water pumps are widely used due to their advantages of precise control and high efficiency. The control board of the electronic water pump controls the water pump motor to provide coolant for the cooling system by outputting and adjusting control signals. The motor will be interfered by electromagnetic radiation when working. In order to ensure that the electronic water pump can work reliably and stably, the electromagnetic interference of the electronic water pump should be reduced as much as possible or the anti-interference ability of the water pump motor should be improved. For this reason, the method of motor grounding is adopted in the related art. However, the method in the related art has disadvantages and needs to be improved. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0004] The grounding method mentioned in document CN209855982U is to set a grounding pattern on the control board and connect it to the metal pump cover through a spring to achieve the purpose of grounding. However, this grounding method cannot effectively reduce the electromagnetic interference when the electronic water pump is working.

[0005] The grounding method mentioned in document CN210518026U is to set a connector with a compressible curved section between the stator assembly and the circuit board, and one end of the connector has a spring sheet that engages with the socket on the end face of the stator assembly. When vibration occurs, the connector uses elastic deformation to swing outward to continue to form a stable connection with the circuit board and the stator assembly. However, this grounding method requires more parts, the manufacturing process of the connector is more complicated, the installation requirements are high, and there is a risk of loosening of the spring sheet connection part of the grounding member in the case of long-term operation.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the present invention provides an electronic water pump, which requires fewer parts to achieve grounding, is easy to implement, can effectively reduce electromagnetic interference during operation, and the grounding piece is reliably fixed and not easy to fall off.

[0008] An embodiment of the present invention further provides a vehicle.

[0009] According to an embodiment of the first aspect of the present invention, an electronic water pump includes a casing, a stator assembly, a control board and an end cover which is a conductor, wherein the end cover is arranged at an end of the casing, the control board is located in the casing and adjacent to the end cover, or the control board is located in the end cover, the control board has a grounding portion, and the grounding portion abuts against the end cover, the stator assembly includes a stator core, the stator core is arranged in the casing, and a mounting portion is provided on the outer peripheral surface of the stator core; a grounding member, the grounding member extends along the axial direction of the stator core and extends from the casing into the end cover, the first end of the grounding member in the extension direction is connected to the mounting portion, and the second end of the grounding member in the extension direction is connected to the control board.

[0010] According to the electronic water pump of the embodiment of the present invention, by fitting one end of the grounding piece in the mounting portion of the stator core, the other end of the grounding piece is connected to the control board, and the grounding portion of the control board is connected to the end cover, the stator core and the end cover are connected to each other, so as to achieve the purpose of grounding the stator core. On the other hand, the electronic water pump of the embodiment of the present invention requires fewer parts to achieve grounding through the above-mentioned grounding method, is easy to install, and is reliable and not easy to fall off, thereby improving the reliability of the electronic water pump during operation.

[0011] In some embodiments, the second end of the grounding member is spaced apart from the grounding portion and is connected through a circuit on the control board.

[0012] In some embodiments, the grounding member includes a first section and a second section connected in sequence along its extension direction, the first section is connected to the mounting portion, the second section is connected to the grounding portion, and a cross-sectional area of ​​the second section is smaller than a cross-sectional area of ​​the first section.

[0013] In some embodiments, an end surface of the second segment away from the first segment is spaced apart from a side surface of the control plate adjacent to the end cap.

[0014] In some embodiments, the grounding portion is provided with a spring sheet which is a conductor, and the grounding portion is in contact with the end cover through the spring sheet.

[0015] In some embodiments, a grounding boss is provided on the inner side surface of the end cover adjacent to the control board, and the grounding boss abuts against the elastic sheet.

[0016] In some embodiments, the inner side surface of the end cover adjacent to the control board is also provided with a heat dissipation boss for facilitating heat dissipation of the control board. The heat dissipation boss is arranged at an interval with the grounding boss. The heat dissipation boss is provided with a matching hole, and the other end of the grounding piece in its length direction is matched in the matching hole.

[0017] In some embodiments, the mounting portion is a groove extending along the axial direction of the rotor core.

[0018] In some embodiments, the stator assembly further includes: an insulating frame, the insulating frame being arranged at the end of the stator core adjacent to the control board and being located in the casing, the insulating frame having a protrusion on the side away from the stator core, and a connecting portion being provided on the side of the protrusion away from the stator core; an electrical connector, the electrical connector extending along the axial direction of the stator core and extending from the casing into the end cover, one end of the electrical connector in the extension direction thereof cooperating with the connecting portion, and the other end of the electrical connector in the extension direction thereof being connected to the control board; a winding, the winding being wound on the teeth of the stator core, and the lead wire of the winding being connected to the electrical connector.

[0019] In some embodiments, the electrical connector includes: a body, which extends along the axial direction of the stator core and is connected to the control board; a first part, which is connected to one end of the body away from the control board; a first extension part and a second extension part, which both extend from the end surface of the first part away from the body in a direction away from the body, and the first extension part and the second extension part are arranged at intervals and cooperate with the connecting part; a second part, which includes a curved section and a straight section connected to each other, the curved section is connected to one end of the first part away from the body and is located between the first extension part and the second extension part, the straight section is opposite to the first part and is arranged at intervals, the lead wire of the winding passes through the gap between the first part and the straight section, and the end of the straight section away from the curved section is welded to the first part to fix the lead wire of the winding in the gap.

[0020] In some embodiments, a side surface of the second portion adjacent to the first portion is provided with a protrusion extending toward the first portion, and the protrusion is spaced apart from the first portion.

[0021] In some embodiments, the stator assembly also includes a fixing plate, which is arranged on a side of the insulating frame away from the stator core, and has a first through hole and a second through hole. The other end of the grounding member in the length direction passes through the first through hole and is welded to the control board, and the other end of the electrical connector in the length direction passes through the second through hole and is welded to the control board.

[0022] A vehicle according to an embodiment of the second aspect of the present invention includes the electronic water pump of any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of an electronic water pump according to an embodiment of the present invention.

[0024] Figure 2 Schematic diagram of the structure of the end cover of the electronic water pump according to an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the structure of a grounding member of an electronic water pump according to an embodiment of the present invention.

[0026] Figure 4 Schematic diagram of the structure of the insulating frame of the electronic water pump according to an embodiment of the present invention.

[0027] Figure 5 Schematic diagram of the structure of the electrical connector of the electronic water pump according to an embodiment of the present invention.

[0028] Figure 6 is a cross-sectional view of an electronic water pump according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1. stator assembly; 11. stator core; 111. groove; 12. stator injection molding; 13. housing injection molding; 131. outer peripheral wall; 132. inner peripheral wall;

[0031] 2. Control panel; 21. Grounding part;

[0032] 3. End cover; 31. Grounding boss; 32. Heat dissipation boss; 321. Matching hole; 33. Heat dissipation rib; 34. Flange; 341. Lug; 3411. Threaded hole;

[0033] 4. grounding piece; 41. first section; 42. second section; 43. plastic package;

[0034] 5. Insulation frame; 51. Protrusion; 511. Connecting portion; 5111. Mounting hole; 52. Concave portion;

[0035] 6. electrical connector; 61. body; 62. first portion; 63. first extension portion; 64. second extension portion; 65. second portion; 651. curved section; 652. straight section; 653. protrusion;

[0036] 7. Winding;

[0037] 8. Fixed plate; 81. First through hole; 82. Second through hole. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] Reference below Figures 1 to 5An electronic water pump and a vehicle having the same according to an embodiment of the present invention are described.

[0040] like Figure 1 As shown, the electronic water pump according to the embodiment of the present invention includes a housing, a stator assembly 1 , a control board 2 and an end cover 3 , wherein the stator assembly 1 includes a stator core 11 and a grounding member 4 .

[0041] Specifically, the end cover 3 and the grounding member 4 are both made of a conductive material, the end cover 3 is disposed at the end of the housing, the control board 2 is located in the housing and adjacent to the end cover 3, or the control board 2 may be located in the end cover 3. The control board 2 has a grounding portion 21, and the grounding portion 21 abuts against the end cover 3. The abutment of the grounding portion 21 with the end cover 3 allows current to be conducted between the control board 2 and the end cover 3.

[0042] The stator core 11 is located in the housing, and a mounting portion is provided on the outer circumference of the stator core. The grounding member 4 extends along the axial direction of the stator core 11 and extends from the housing into the end cover 3, wherein the first end of the grounding member 4 (such as Figure 1 The upper end of the grounding member 4 is installed in the installation part, and the second end of the grounding member 4 (such as Figure 1 The lower end of the middle grounding piece 4 is connected to the control board 2.

[0043] like Figure 1 As shown, when the electronic water pump has a leakage fault, the current in the winding 7 can flow through the electronic iron core, the grounding member 4, the control board 2 and the end cover 3 in sequence, and finally be introduced into the earth through the grounding wire connected to the end cover 3 to achieve grounding protection for the electronic water pump. On the other hand, the electronic water pump of the embodiment of the present invention requires fewer parts to achieve grounding through the above-mentioned grounding method, is easy to install, and is reliably installed and not easy to fall off, thereby improving the reliability of the electronic water pump during operation.

[0044] In some embodiments, the second end of the grounding member (eg Figure 1 The lower end of the grounding member 4 is arranged at intervals with the grounding portion 21 and is connected through the circuit on the control board 2. In other words, the end of the grounding member 4 connected to the control board 2 is not directly connected to the grounding portion 21, and the end of the grounding member 4 connected to the control board 2 is connected to the grounding portion 21 through the circuit on the control board 2. This can reduce the electromagnetic interference of the electronic water pump when it is working to a certain extent, and facilitate the layout planning of the circuit on the control board 2 by the technicians, thereby improving the space utilization inside the electronic water pump.

[0045] In some embodiments, the mounting portion is a groove 111 extending along the axial direction of the stator core 11. In other words, the outer peripheral surface of the stator core 11 is provided with a groove 111 extending along the axial direction of the stator core 11 (such as Figure 1 The groove 111 extends in the vertical direction to allow one end of the grounding member 4 (such as Figure 1The upper end of the middle grounding piece 4 is inserted into the groove to connect the grounding piece 4 to the stator core 11.

[0046] In some embodiments, Figure 1 and Figure 3 As shown, the grounding member 4 includes a first section 41 and a second section 42, which are sequentially connected along their extension direction and parallel to the axial direction of the stator core 11. The first section 41 is installed in the groove 111, for example, the first section 41 can be fixed in the groove 111 by interference fit, or the first section 41 can be fixed in the groove 111 by welding, bonding or other fixing methods. Further, before the first section 41 is fixed to the groove 111, the first section 41 can be slid in the groove 111 along the axial direction of the stator core 11 to adjust the installation distance between the second section 42 and the control board 2, thereby improving the convenience of installing the electronic water pump. The second section 42 can be installed on the control board 2 by welding, and is connected to the grounding portion 21 through the circuit on the control board 2. Preferably, the cross-sectional area of ​​the second section 42 is smaller than the cross-sectional area of ​​the first section 41, so that it is convenient for the operator to insert the grounding member 4 into the control board 2, thereby welding and fixing the second section 42.

[0047] In some embodiments, the end surface of the second section 42 away from the first section 41 is spaced apart from a side surface of the control board 2 adjacent to the end cap 3. Preferably, the distance between the end surface of the second section 42 away from the first section 41 and a side surface of the control board 2 adjacent to the end cap 3 is greater than or equal to 0.5 mm. Figure 1 As shown, the distance between the lower surface of the second section 42 and the lower surface of the control board 2 is greater than or equal to 0.5 mm, thereby preventing the end surface of the second section 42 adjacent to the first section 41 from being tightly attached to the control board 2, causing the solder to be unable to fully penetrate into the plug hole of the second section 42, resulting in a problem of loose welding.

[0048] In some embodiments, the grounding portion 21 is provided with a spring (not shown), and the grounding portion 21 abuts against the end cover 3 through the spring. The spring is elastic and made of a conductive material. During the rotation of the stator assembly 1, even if there is a slight vibration, the grounding portion 21 and the end cover 3 can still maintain contact. Further, the inner side of the end cover 3 adjacent to the control board 2 is provided with a grounding boss 31, such as Figure 2 The grounding boss 31 abuts against the spring sheet to facilitate the mutual conduction between the control board 2 and the end cover 3 .

[0049] In some embodiments, Figure 2 As shown, the outer peripheral surface of the end cover 3 and the outer side surface of the end cover 3 away from the control board 2 (such as Figure 2The lower side of the end cover 3 shown in the figure is provided with a plurality of heat dissipation ribs 33, and the plurality of heat dissipation ribs 33 are arranged at intervals along the circumference of the end cover 3. Furthermore, a heat dissipation boss 32 is also provided on the inner side of the end cover 3 adjacent to the control board 2 to assist in the heat dissipation of the control board 2. Specifically, a plurality of heat dissipation bosses 32 are provided and of different sizes, and the plurality of heat dissipation bosses 32 are arranged at intervals with the grounding boss 31, and a matching hole 321 is opened on one of the heat dissipation bosses 32, and one end of the grounding member 4 adjacent to the control board 2 extends into the matching hole 321 to avoid interference between the grounding member 4 and the end cover 3.

[0050] Furthermore, a flange 34 extending outward is provided at the circumference of one end of the end cover 3 adjacent to the control board 2, and a plurality of lugs 341 are provided at the outer edge of the flange 34, and the lugs 341 are arranged at intervals along the circumference of the flange 34, and a plurality of lugs 341 are provided with threaded holes 3411 for threaded connection with the housing. In order to improve the sealing performance of the electronic water pump, a sealing gasket may be provided at the connection between the flange 34 and the housing, or a sealant may be filled to improve the dustproof and waterproof performance of the connection between the end cover 3 and the housing.

[0051] In some embodiments, Figure 1 and Figure 4 As shown, the stator assembly 1 further includes an insulating frame 5, an electrical connector 6 and a winding 7. The insulating frame 5 is disposed at the end of the stator core 11 adjacent to the control board 2 (eg Figure 1 The lower end of the stator core 11) is located inside the housing, and the insulating frame 5 is away from the side of the stator core 11 (such as Figure 1 The lower side of the middle insulating frame 5 has a convex portion 51 and a concave portion 52 formed between adjacent convex portions 51. There may be multiple convex portions 51, and the multiple protrusions 653 are arranged at intervals along the circumferential direction of the stator core 11. The convex portion 51 is away from one side of the stator core 11 (such as Figure 1 A connecting portion 511 is provided on the lower side of the middle convex portion 51.

[0052] The electrical connector 6 extends along the axial direction of the stator core 11 and extends from the housing into the end cover 3. The electrical connector 6 has one end (eg Figure 1 The upper end of the electrical connector 6) cooperates with the connecting portion 511, and the other end of the electrical connector 6 in its extending direction (such as Figure 1 The lower end of the electric connector 6 in the middle is connected to the control board 2. The winding 7 is wound on the teeth of the stator core 11, and the lead wires of the winding 7 are connected to the electric connector 6. In other words, the three-phase lead wires of the winding 7 are respectively connected to the three electric connectors 6, and are connected to the control board 2 through the three electric connectors 6.

[0053] In some embodiments, Figure 1 and Figure 5As shown, the electrical connector 6 includes a body 61, a first portion 62, a first extension portion 63, a second extension portion 64, and a second portion 65. The body 61 extends along the axial direction of the stator core 11, and the body 61 is away from one end of the control board 2 (such as Figure 1 The upper end of the middle body 61 is connected to the first part 62, and the body 61 is adjacent to one end of the control board 2 (such as Figure 1 The lower end of the middle body 61 is connected to the control board 2. The first extension portion 63 and the second extension portion 64 are both extended from the end surface of the first portion 62 away from the body (such as Figure 1 The upper end surface of the first portion 62 in the middle is along the direction away from the main body 61 (such as Figure 1 The first extension portion 63 and the second extension portion 64 are arranged at intervals and cooperate with the connecting portion 511.

[0054] Preferably, the first extension portion 63 and the second extension portion 64 are parallel to each other, and the connecting portion 511 is provided with a mounting hole 5111 for plugging the first extension portion 63 and the second extension portion 64. The first extension portion 63 and the second extension portion 64 are respectively inserted into the corresponding mounting holes 5111, so that the electrical connector 6 and the connecting portion 511 are detachably connected, thereby facilitating the installation and replacement of the electrical connector 6.

[0055] Specifically, the second part 65 includes a curved section 651 and a straight section 652 connected to each other, wherein the curved section 651 is connected to one end of the first part 62 away from the main body 61, and the curved section 651 is located between the first extension part 63 and the second extension part 64, and the straight section 652 is opposite to the first part 62 and arranged at intervals, and the lead wire of the winding 7 passes through the gap between the first part 62 and the straight section 652, and one end of the straight section 652 away from the curved section 651 is welded to the first part 62 to fix the lead wire of the winding 7 in the gap.

[0056] Furthermore, if Figure 1 and Figure 5 As shown, a protrusion 653 extending toward the first portion 62 is provided on the side of the straight section 652 adjacent to the first portion 62, and the protrusion 653 is spaced apart from the first portion 62, that is, the protrusion 653 does not abut against the first portion 62. When the lead wire of the winding 7 passes through the gap between the first portion 62 and the straight section 652, solder can be applied to the protrusion 653 to fix the lead wire in the gap, thereby reducing the melting amount of the solder; on the other hand, the protrusion 653 cooperates with the first portion 62 and the second portion 65 to form a hook-shaped structure, so as to fix the lead wire.

[0057] In some embodiments, Figure 1As shown, the stator assembly 1 further includes a fixing plate 8 for fixing the grounding member 4 and the electrical connector 6. The fixing plate 8 is disposed on a side of the insulating frame away from the stator core 11, and the fixing plate 8 has a first through hole 81 and a second through hole 82 for the grounding member 4 and the electrical connector 6 to pass through. Specifically, there is one first through hole 81, and there are three electrical connectors 6. The other end of the grounding member 4 in the length direction passes through the first through hole 81 and is welded to the control board 2, and the other ends of the three electrical connectors 6 connected with the three-phase lead wires in the length direction pass through the three second through holes 82 and are welded to the control board 2.

[0058] In some embodiments, Figure 6 As shown, the electronic water pump also includes a stator injection molded body 12 and a casing injection molded body 13. The stator injection molded body 12 is formed by one-time injection molding, a portion of the stator injection molded body 12 is coated on the outer peripheral wall 131 of the stator assembly 1, and the cross section of the stator injection molded body 12 is annular. On the other hand, the casing injection molded body 13 is formed by secondary injection molding, and the casing injection molded body 13 covers the stator injection molded body 12, wherein the casing injection molded body 13 includes an outer peripheral wall 131 and an inner peripheral wall 132, and the stator injection molded body 12 is located between the outer peripheral wall 131 and the inner peripheral wall 132. In other words, the stator injection molded body 12 is located inside the casing injection molded body 13, thereby improving the strength of the electronic water pump and the reliability during use.

[0059] Furthermore, if Figure 6 As shown, the outer periphery of the grounding member 4 and the electrical connector 6 is coated with a plastic body 43, the plastic body 43 is connected to the stator core 11, and the plastic body 43 is spaced apart from the control board 2 in the axial direction of the housing. There is a certain distance between the lower surface of the plastic body 43 and the upper surface of the control board 2. By coating the grounding member 4 and the electrical connector 6 inside the plastic body 43, the grounding member 4 and the electrical connector 6 can be fixed and supported to reduce the probability of deformation or damage of the grounding member 4 and the electrical connector 6 during processing, transportation, and assembly. On the other hand, the plastic body 43 is spaced apart from the control board 2 in the axial direction of the housing, which can avoid interference between the plastic body 43 and the control board 2, and facilitate the operator to weld the grounding member 4 and the electrical connector 6 to the control board 2, thereby improving the welding effect of the product.

[0060] The electronic water pumps according to some specific examples of the present invention are described below with reference to the accompanying drawings.

[0061] like Figure 1-Figure 5As shown, the electronic water pump includes a housing, a stator assembly 1, a control board 2 and an end cover 3, wherein the stator assembly 1 includes a stator core 11, a grounding member 4, an insulating frame 5, an electrical connector 6, a winding 7 and a fixing plate 8. The end cover 3, the grounding member 4 and the electrical connector 6 are all made of conductive materials, such as metals or alloy materials such as aluminum and copper. The stator assembly 1 is arranged in the housing, the end cover 3 is arranged at the lower end of the housing, the control board 2 is located in the housing and adjacent to the end cover 3, or the control board 2 can also be located in the end cover 3. The insulating frame 5 is arranged at the lower end of the stator core 11. A fixing plate 8 is arranged between the insulating frame 5 and the control board 2.

[0062] Specifically, Figure 1 and Figure 2 As shown, the control board 2 has a grounding portion 21, and the upper side of the end cover 3 is provided with a grounding boss 31. The grounding portion 21 and the grounding boss 31 are abutted by a spring sheet, so that the control board 2 and the end cover 3 can conduct current. Figure 1 The stator core 11 has a groove 111 extending in the vertical direction, and the groove 111 passes through the upper and lower ends of the stator core 11, the upper end of the grounding member 4 fits in the groove 111, and the lower end of the grounding member 4 is connected to the control board 2. The lower end of the grounding member 4 is spaced apart from the grounding portion 21. In other words, the lower end of the grounding member 4 is not directly connected to the grounding portion 21, and the end of the grounding member 4 connected to the control board 2 is connected to the grounding portion 21 through the circuit on the control board 2.

[0063] Furthermore, if Figures 1 to 3 As shown, the grounding member 4 includes a first section 41 and a second section 42, which are sequentially connected along their extension direction and parallel to the axial direction of the stator core 11. The first section 41 is fixed in the groove 111 by welding. The cross-sectional area of ​​the second section 42 is smaller than that of the first section 41. The second section 42 is plugged into the control board 2 and fixed to the control board 2 by welding. The upper side of the end cover 3 is also provided with a plurality of heat dissipation bosses 32, and a matching hole 321 is opened on the upper side of one of the heat dissipation bosses 32 to prevent the second section 42 from being inserted downward into the end of the control board 2, thereby avoiding interference between the grounding member 4 and the end cover 3.

[0064] Furthermore, a flange 34 extending outward is provided at the circumference of one end of the end cover 3 adjacent to the control board 2, and a plurality of lugs 341 are provided at the outer edge of the flange 34, and the lugs 341 are arranged at intervals along the circumference of the flange 34, and a plurality of lugs 341 are provided with threaded holes 3411 for threaded connection with the housing. In order to improve the sealing performance of the electronic water pump, a sealing gasket may be provided at the connection between the flange 34 and the housing, or a sealant may be filled to improve the dustproof and waterproof performance of the connection between the end cover 3 and the housing.

[0065] The distance between the end face of the second section 42 away from the first section 41 and the side face of the control board 2 adjacent to the end cover 3 is greater than or equal to 0.5 mm. This can prevent the end face of the lower end of the first section 41 from being close to the control board 2, which would cause the solder to not be fully immersed in the plug hole of the second section 42, resulting in a problem of weak welding. The fixing plate 8 is provided with a first through hole 81, and the grounding member 4 passes downward through the first through hole 81 to be connected to the control board 2, thereby further fixing the grounding member 4.

[0066] like Figure 1 and Figure 4 As shown, the insulating frame 5 has a convex portion 51 and a concave portion 52 formed between adjacent convex portions 51 on one side away from the stator core 11. The convex portions 51 and the concave portions 52 are provided in plurality and are arranged at intervals along the circumference of the stator core 11. The outer side surface of the convex portion 51 is provided with a connecting portion 511. There are three electrical connectors 6, which extend downward and extend from the housing into the end cover 3. The upper end of the electrical connector 6 cooperates with the connecting portion 511, and the lower end of the electrical connector 6 is connected to the control board 2. The winding 7 is wound on the teeth of the stator core 11, and the lead wires of the winding 7 are connected to the electrical connector 6. In other words, the three-phase lead wires of the winding 7 are respectively connected to the three electrical connectors 6, and are connected to the control board 2 through the three electrical connectors 6.

[0067] like Figure 5 As shown, the electrical connector 6 includes a body 61, a first portion 62, a first extension portion 63, a second extension portion 64, and a second portion 65. Figure 1 As shown, the body 61 extends in the up-down direction, the upper end of the body 61 is connected to the first portion 62, and the lower end of the body 61 is connected to the control board 2. The first extension portion 63 and the second extension portion 64 both extend vertically upward from the upper end surface of the first portion 62, and the first extension portion 63 and the second extension portion 64 are arranged parallel to each other. The connecting portion 511 is provided with a mounting hole 5111 for plugging the first extension portion 63 and the second extension portion 64. The first extension portion 63 and the second extension portion 64 are respectively inserted into the corresponding mounting holes 5111, so that the electrical connector 6 is connected to the connecting portion 511, thereby facilitating the installation and replacement of the electrical connector 6.

[0068] Furthermore, if Figure 5As shown, the second part 65 includes a curved section 651 and a straight section 652 connected to each other, wherein the curved section 651 is connected to the upper end of the first part 62, and the curved section 651 is located between the first extension part 63 and the second extension part 64, and the straight section 652 is opposite to the first part 62 and arranged at intervals. The side of the straight section 652 adjacent to the first part 62 is provided with a protrusion 653 extending toward the first part 62, and the protrusion 653 is spaced apart from the first part 62, that is, the protrusion 653 does not abut against the first part 62. The protrusion 653 cooperates with the first part 62 and the second part 65 to form a gap of a hook-shaped structure. When the lead wire of the winding 7 passes through the gap between the first part 62 and the straight section 652, solder can be applied to the protrusion 653 to fix the lead wire in the gap, thereby reducing the melting amount of the solder and facilitating the fixing of the lead wire. Furthermore, three second through holes 82 are formed on the fixing plate 8 , and the three electrical connectors 6 pass through the three second through holes 82 respectively to be connected to the control board 2 , thereby further fixing the electrical connectors 6 .

[0069] like Figure 6 As shown, the electronic water pump also includes a stator injection-molded body 12 and a casing injection-molded body 13. The stator injection-molded body 12 is formed by one-time injection molding, and a portion of the stator injection-molded body 12 is coated on the outer peripheral wall 131 of the stator assembly 1, and the cross-section of the stator injection-molded body 12 is annular. On the other hand, the casing injection-molded body 13 is formed by secondary injection molding, and the casing injection-molded body 13 coats the stator injection-molded body 12, wherein the casing injection-molded body 13 includes an outer peripheral wall 131 and an inner peripheral wall 132, and the stator injection-molded body 12 is located between the outer peripheral wall 131 and the inner peripheral wall 132. In other words, the stator injection-molded body 12 is located inside the casing injection-molded body 13, thereby improving the strength of the electronic water pump and its reliability during use. Further, as Figure 6 As shown, a plastic package 43 can be provided on the periphery of the grounding member 4 and the electrical connector 6, and the plastic package 43 is connected to the stator core 11, and the plastic package 43 is spaced apart from the control board 2 in the axial direction of the housing. There is a certain distance between the lower surface of the plastic package 43 and the upper surface of the control board 2. By covering the grounding member 4 and the electrical connector 6 inside the plastic package 43, the grounding member 4 and the electrical connector 6 can be fixed and supported to reduce the probability of deformation or damage of the grounding member 4 and the electrical connector 6 during processing, transportation, and assembly. On the other hand, the plastic package 43 is spaced apart from the control board 2 in the axial direction of the housing, which can avoid interference between the plastic package 43 and the control board 2, and facilitate the operator to weld the grounding member 4 and the electrical connector 6 to the control board 2, thereby improving the welding effect of the product.

[0070] A vehicle according to an embodiment of the present invention includes an electronic water pump according to an embodiment of the present invention.

[0071] Optionally, the vehicle having the electronic water pump may be a pure electric vehicle, an extended-range electric vehicle, a hybrid electric vehicle, a fuel cell electric vehicle, a hydrogen engine vehicle, etc.

[0072] According to the vehicle of the embodiment of the present invention, the electronic water pump of the vehicle requires fewer parts to achieve grounding, is easy to install, and is reliably installed and not easy to fall off, thereby improving the reliability of the electronic water pump during operation.

[0073] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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 higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0077] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An electronic water pump, characterized in that: The invention comprises a housing, a stator assembly, a control board and an end cover which is a conductor, wherein the end cover is arranged at the end of the housing, the control board is located in the housing and adjacent to the end cover, or the control board is located in the end cover, the control board has a grounding portion, and the grounding portion abuts against the end cover, and the stator assembly comprises: A stator core, the stator core is arranged in the housing, and a mounting portion is provided on the outer circumference of the stator core; A grounding member, the grounding member extending along the axial direction of the stator core and extending from the housing into the end cover, the first end of the grounding member in the extending direction is connected to the mounting portion, and the second end of the grounding member in the extending direction is connected to the control board; The grounding member comprises a first section and a second section connected in sequence along its extension direction, the first section is connected to the mounting portion, the second section is connected to the grounding portion, and the cross-sectional area of ​​the second section is smaller than the cross-sectional area of ​​the first section; The mounting portion is a groove extending along the axial direction of the stator core.

2. The electronic water pump according to claim 1, characterized in that: The second end of the grounding member is spaced apart from the grounding portion and is connected through a circuit on the control board.

3. The electronic water pump according to claim 1, characterized in that: An end surface of the second section away from the first section is spaced apart from a side surface of the control board adjacent to the end cover.

4. The electronic water pump according to claim 1, characterized in that: The grounding portion is provided with a spring sheet which is a conductor, and the grounding portion is in contact with the end cover through the spring sheet.

5. The electronic water pump according to claim 4, characterized in that: A grounding boss is provided on the inner side surface of the end cover adjacent to the control board, and the grounding boss abuts against the elastic sheet.

6. The electronic water pump according to claim 5, characterized in that: The inner side surface of the end cover adjacent to the control board is also provided with a heat dissipation boss for facilitating heat dissipation of the control board. The heat dissipation boss is arranged at an interval with the grounding boss. The heat dissipation boss is provided with a matching hole, and the second end of the grounding member is matched in the matching hole.

7. The electronic water pump according to any one of claims 1 to 6, characterized in that: The stator assembly further comprises: An insulating frame, the insulating frame is arranged at an end of the stator core adjacent to the control board and is located in the housing, the insulating frame has a convex portion on a side away from the stator core, and a connecting portion is provided on a side of the convex portion away from the stator core; An electrical connector, the electrical connector extending along the axial direction of the stator core and extending from the housing into the end cover, one end of the electrical connector in the extending direction thereof being matched with the connecting portion, and the other end of the electrical connector in the extending direction thereof being connected to the control board; The winding is wound on the teeth of the stator core, and the lead wire of the winding is connected to the electrical connector.

8. The electronic water pump according to claim 7, characterized in that: The electrical connector comprises: A body, the body extending along the axial direction of the stator core, the body being connected to the control board; a first part connected to an end of the body away from the control panel; a first extending portion and a second extending portion, wherein the first extending portion and the second extending portion both extend from an end surface of the first portion away from the body in a direction away from the body, and the first extending portion and the second extending portion are arranged at intervals and cooperate with the connecting portion; The second part includes a curved section and a straight section connected to each other, the curved section is connected to the end of the first part away from the main body and is located between the first extension part and the second extension part, the straight section is opposite to the first part and arranged at intervals, the lead wire of the winding passes through the gap between the first part and the straight section, and the end of the straight section away from the curved section is welded to the first part to fix the lead wire of the winding in the gap.

9. The electronic water pump according to claim 8, characterized in that: A protrusion extending toward the first portion is provided on one side of the second portion adjacent to the first portion, and the protrusion is spaced apart from the first portion.

10. The electronic water pump according to claim 7, characterized in that: The stator assembly also includes a fixing plate, which is arranged on a side of the insulating frame away from the stator core, and has a first through hole and a second through hole. The other end of the grounding member in the length direction passes through the first through hole and is welded to the control board, and the other end of the electrical connector in the length direction passes through the second through hole and is welded to the control board.

11. A vehicle, characterized in that: It comprises the electronic water pump as claimed in any one of claims 1 to 10.

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