Water pump and vehicle having the same

Abstract

The present invention discloses a water pump and a vehicle equipped with the water pump. The water pump includes a housing, a stator assembly, a control panel, a plastic overmolding, and a plurality of pins. The housing includes a casing and an end cover, the end cover being disposed at one axial end of the casing. The casing includes a bottom wall, the stator assembly being disposed within the housing, and the control panel being disposed within the housing. The plurality of pins are spaced apart, extending axially along the casing and extending from the stator assembly into the end cover. One end of the pin is connected to the stator assembly, and the other end of the pin passes through the bottom wall and is connected to the control panel. The plastic overmolding covers a portion of the outer periphery of the pin, is connected to the side of the bottom wall away from the stator assembly, and is spaced axially from the control panel of the casing. The pins in the water pump of the present invention are not easily deformed or even damaged, reducing the risk of quality accidents.

Description

Technical Field

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

[0002] Pins are crucial components for connecting the pump wiring to the controller, conducting current. Because pins are much longer than they are thick and slender, they are prone to deformation during processing, transportation, and assembly. This deformation can cause inaccurate positioning and damage to the pins or other components, leading to serious quality issues. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of one aspect of the present invention provides a water pump, in which the pins are not easily deformed or even damaged, thereby reducing the risk of quality accidents.

[0005] According to another aspect of the present invention, a vehicle is provided.

[0006] The water pump according to an embodiment of the first aspect of the present invention is characterized in that it includes: a housing, the housing including a casing and an end cover, the end cover is arranged at one end of the casing in the axial direction, and the casing includes a bottom wall; a stator assembly, the stator assembly is arranged in the housing, a control board, the control board is arranged in the housing, a plurality of pins, the plurality of pins are arranged at intervals, the pins extend along the axial direction of the casing and extend from the stator assembly into the end cover, one end of the pin is connected to the stator assembly, and the other end of the pin passes through the bottom wall and is connected to the control board; a plastic overmolding body, the plastic overmolding body covering the outer circumference of a portion of the pin, the plastic overmolding body is connected to the side of the bottom wall away from the stator assembly, and the plastic overmolding body and the control board are spaced apart in the axial direction of the casing.

[0007] In a water pump according to an embodiment of the present invention, a plastic overmolding is positioned around the outer periphery of the pins, which is connected to the upper surface of the bottom wall. This secures the pins and reduces the likelihood of deformation or damage during processing, transport, and assembly. The plastic overmolding is spaced axially from the control board within the housing. This prevents interference between the plastic overmolding and the control board, facilitates soldering of the pins to the control board, and improves soldering quality.

[0008] In some embodiments, the housing and the overmolded body are integrally formed by injection molding.

[0009] In some embodiments, the overmolded body has a through hole therein, a portion of the pin fits in the through hole, and a distance between an inner wall surface of the through hole and an outer peripheral surface of the overmolded body is greater than 0 mm and less than or equal to 5 mm.

[0010] In some embodiments, the overmolded body has an axial dimension greater than 10 mm.

[0011] In some embodiments, a distance between an end surface of the overmolded body adjacent to the control board and an end surface of the control board adjacent to the overmolded body is greater than or equal to 1 mm.

[0012] In some embodiments, a distance between an end surface of the overmolded body adjacent to the control board and an end surface of the control board adjacent to the overmolded body is greater than or equal to 1 mm and less than or equal to 3 mm.

[0013] In some embodiments, the distance between the end face of the control board adjacent to the bottom wall and the side face of the bottom wall adjacent to the control board is A, the other end of the pin is connected to the control board via solder, the distance that the solder protrudes from the end face of the control board adjacent to the bottom wall is B, the distance between the end of the other end of the pin and the side face of the bottom wall adjacent to the control board is H, the dimension of the overmolded body in the axial direction of the housing is h, and the following conditions are satisfied: Wherein 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, and I is the section moment of inertia.

[0014] In some embodiments, the pin includes a first section and a second section connected in sequence along its extension direction, one end of the first section is connected to the stator assembly, the other end of the first section passes through the bottom wall and is connected to one end of the second section, the other end of the second section is connected to the control board, and the plastic body is covered on the outer periphery of the first section.

[0015] In some embodiments, the overmolded body includes a first end face adjacent to the control board and a second end face away from the control board, the outer contour of the first end face is polygonal, circular or elliptical, the outer contour of the second end face is polygonal, circular or elliptical, and the outer contour of the first end face and the outer contour of the second end face are the same or different.

[0016] In some embodiments, the outer contour of the inclusion body is polygonal, circular, or elliptical.

[0017] In some embodiments, the cross-sectional area of ​​the overmolded body gradually decreases in a direction toward the control board, or the cross-sectional area of ​​the overmolded body remains unchanged along the axial direction of the housing.

[0018] In some embodiments, the stator assembly includes a stator core, an insulating frame and a winding, the insulating frame is at least partially provided at one end of the stator core in the axial direction, the insulating frame has a protrusion and a recess formed between adjacent protrusions, the winding is wound around the protrusion of the insulating frame, the plurality of pins include a phase pin, one end of the phase pin is fixed in the protrusion of the insulating frame and connected to the lead wire of the winding, and the other end of the phase pin passes through the bottom wall and is connected to the control board.

[0019] In some embodiments, a groove is provided on the outer peripheral surface of the stator core, and the plurality of pins further include a grounding pin, one end of the grounding pin fits in the groove, and the other end of the grounding pin passes through the bottom wall and is connected to the control board.

[0020] A vehicle according to an embodiment of the second aspect of the present invention includes the water pump described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of a water pump according to an embodiment of the present invention.

[0022] Figure 2 yes Figure 1 Enlarged view of C in the middle.

[0023] Figure 3 1 is a schematic structural diagram of a water pump according to an embodiment of the present invention.

[0024] Figure 4 yes Figure 3 Side view of the greywater pump.

[0025] Figure 5 2 is a schematic structural diagram of a water pump according to another embodiment of the present invention.

[0026] Figure 6 yes Figure 5 Side view of the greywater pump.

[0027] Figure 7 2 is a schematic structural diagram of a water pump according to another embodiment of the present invention.

[0028] Figure 8 yes Figure 7 Side view of the greywater pump.

[0029] Figure 9 2 is a schematic structural diagram of a water pump according to another embodiment of the present invention.

[0030] Figure 10 yes Figure 9 Side view of the greywater pump.

[0031] Figure 112 is a schematic structural diagram of a water pump according to another embodiment of the present invention.

[0032] Figure 12 yes Figure 11 Side view of the greywater pump.

[0033] Figure 13 2 is a schematic structural diagram of a water pump according to yet another embodiment of the present invention.

[0034] Figure 14 yes Figure 13 Side view of the greywater pump.

[0035] Figure 15 1 is a schematic diagram of the interior of a water pump according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 1. Shell; 11. Casing; 111. Bottom wall;

[0038] 2. Control panel;

[0039] 3. stator assembly; 31. stator core; 32. winding; 33. insulation frame; 331. convex portion; 332. concave portion;

[0040] 4. Pin; 41. First section; 42. Second section; 43. Phase pin; 44. Ground pin;

[0041] 5. Plastic package; 51. Through hole; 52. First end face; 53. Second end face. DETAILED DESCRIPTION

[0042] The 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.

[0043] Reference below Figures 1 to 15 A water pump and a vehicle having the water pump according to embodiments of the present invention are described.

[0044] like Figure 1 、 Figure 2 and Figure 15 As shown, the water pump according to the embodiment of the present invention includes a housing 1, a stator assembly 3, a control board 2, a pin 4 and a plastic package 5. The housing 1 includes a casing 11 and an end cover (not shown). The casing 11 includes a bottom wall 111. The end cover is provided in the axial direction of the casing 11 (as shown in FIG. Figure 1 The stator assembly 3 is provided in the housing 11. It can be understood that the end cover and the stator assembly 3 are respectively provided on opposite sides of the bottom wall 111 ( Figure 1The upper and lower sides of the middle bottom wall 111).

[0045] The control board 2 is provided in the housing 1, and the pins 4 are provided in plurality and arranged at intervals. The pins 4 are arranged along the axial direction of the housing 11 ( Figure 1 The upper and lower directions in the figure) extend from the stator assembly 3 into the end cover, and one end of the pin 4 ( Figure 1 The lower end of the middle pin 4) is connected to the stator assembly 3, and the other end of the pin 4 ( Figure 1 The upper end of the middle pin 4 passes through the bottom wall 111 and is connected to the control board 2.

[0046] The plastic body 5 covers the outer periphery of a portion of the pin 4, and the plastic body 5 and the side of the bottom wall 111 away from the stator assembly 3 (such as Figure 2 The upper surface of the bottom wall 111 is connected to the housing 11, and the plastic body 5 and the control board 2 are spaced apart in the axial direction of the housing 11. Figure 1 and Figure 2 As shown, there is a certain distance between the upper surface of the overmolded body 5 and the lower surface of the control board 2. Specifically, the overmolded body 5 is formed by injection molding.

[0047] After research, the inventors discovered that the exposed length of pin 4 in the housing 11 is relatively long, and the exposed portion of pin 4 is unsupported, making it susceptible to deformation during subsequent transportation and assembly. Therefore, according to an embodiment of the present invention, pin 4 is secured by providing a plastic overmolding 5 around the periphery of pin 4 and connecting the plastic overmolding 5 to the upper surface of the bottom wall 111. On the one hand, the plastic overmolding 5 provides a fixed support for pin 4, thereby reducing the probability of deformation or damage to pin 4 during processing, transportation, and assembly. On the other hand, the plastic overmolding 5 is spaced axially from the control board 2 in the housing 11, thereby preventing interference between the plastic overmolding 5 and the control board 2, facilitating the operator's soldering of pin 4 to the control board 2, and improving the product's soldering performance.

[0048] In some embodiments, the housing 11 and the overmolded body 5 are integrally injection-molded. The inventors have discovered that during injection molding of the housing 11 and the overmolded body 5, the shape of the overmolded body 5 on the pins 4 is formed in the mold. A correspondingly shaped bell-shaped structure is provided in the mold. This structure facilitates guiding, shaping, and securing the pins 4 during mold closing, preventing deformation of the pins 4 and ensuring the circumferential positioning accuracy of the stator assembly 3 within the housing 11.

[0049] In some embodiments, as Figure 1 and Figure 2 As shown, the pin 4 includes a Figure 2 The first section 41 and the second section 42 are connected in sequence (in the up and down direction), and one end of the first section 41 (such as Figure 2 The lower end of the first section 41 in the middle) is connected to the stator assembly 3, and the other end of the first section 41 (such as Figure 2The upper end of the first section 41) passes through the bottom wall 111 and one end of the second section 42 (such as Figure 2 The lower end of the second section 42 is connected to the other end of the second section 42 (such as Figure 2 The upper end of the second section 42 is connected to the control board 2, wherein the plastic body 5 is covered on the outer periphery of the first section 41 extending upward from the bottom wall 111. In some embodiments, as Figures 3 to 14 As shown, the overmolded body 5 has a through hole 51 in which a portion of the pin 4 fits. The distance between the inner wall of the through hole 51 and the outer peripheral surface of the overmolded body 5 is greater than 0 mm and less than or equal to 5 mm.

[0050] like Figure 2 As shown, the through hole 51 passes through the upper and lower ends of the overmolded body 5 along the axial direction, and the through hole 51 passes through the upper and lower surfaces of the bottom wall 111 for the insertion of the pin 4. The lower end of the pin 4 is inserted into the through hole 51 and passes through the bottom wall 111 downward.

[0051] The thickness of the outer wall of the overmolded body 5 adjacent to the control board 2 is greater than 0 mm and less than or equal to 5 mm, thereby improving the connection strength between the overmolded body 5 and the pin 4 and the control board 2, and reducing the probability of deformation or damage of the pin 4 during processing, transportation, and assembly.

[0052] In some embodiments, the plastic package 5 is arranged in the axial direction of the housing 11 (eg Figure 1 The dimension (in the vertical direction) is greater than 10 mm. This increases the length of the outer peripheral wall of the pin 4 covered by the plastic package 5, thereby improving the firmness of the connection of the pin 4.

[0053] Furthermore, the distance between the end surface of the plastic package 5 adjacent to the control board 2 and the end surface of the control board 2 adjacent to the plastic package 5 is greater than or equal to 1 mm. Figure 2 As shown, the gap between the upper end surface of the overmolding 5 and the lower end surface of the control board 2 is greater than or equal to 1 mm. Preferably, the gap between the upper end surface of the overmolding 5 and the lower end surface of the control board 2 is greater than or equal to 1 mm and less than or equal to 3 mm. Furthermore, during the soldering process, when the operator solders the pins 4 on the upper surface of the control board 2, the overmolding 5 on the lower surface of the control board 2 can block the molten solder, allowing the solder to remain as close to the solder holes as possible, ensuring a secure connection between the pins 4 and the control board 2.

[0054] In some embodiments, the distance between the end face of the control board 2 adjacent to the bottom wall 111 and the side face of the bottom wall 111 adjacent to the control board 2 is A, the other end of the pin 4 is connected to the control board 2 via solder, and the distance that the solder protrudes from the end face of the control board 2 adjacent to the bottom wall 111 is B, the distance between the other end of the pin 4 and the side face of the bottom wall 111 adjacent to the control board 2 is H, and the axial dimension of the overmolded body 5 in the housing 11 is h, and the following conditions are satisfied: Where W is the end deflection of the other end of the pin 4, P is the load applied to the end of the other end of the pin, E is the modulus of elasticity, and I is the moment of inertia of the cross-section.

[0055] Specifically, the outer peripheral contour of the cross-section of the pin 4 is rectangular. In the cross-section of the pin 4, the length of the pin 4 is b and the width is a. A through-hole is formed in the control board 2, and the other end of the pin 4 passes through the control board 2 through the through-hole. The through-hole is a circular hole with a diameter of d.

[0056] Before the pin 4 is welded into the through-hole, the pin 4 and the through-hole are in clearance fit, that is, the pin 4 can swing circumferentially in the through-hole. Since the length of the through-hole is b and the diameter of the through-hole is d, the offset value of the pin 4 swinging circumferentially in the through-hole does not exceed (d - b) / 2. When the pin 4 is welded into the through-hole, the pin 4 is a cantilever beam structure fixed at one end. Therefore, the deflection W of the fixed end of the pin 4 needs to be less than (d - b) / 2.

[0057] The calculation formula for the deflection of the cantilever beam is: W = PL Figure 13 , , Figure 14 , Figure 4 , ,

[0059] , Figure 3 , Figure 8 , , Figure 4 , Figure 7 ,

[0058] , Figure 7 , Figure 3 / (3EI). Where the length of the cantilever beam is L, that is, the length of the part of the pin 4 extending out of the plastic body 5 and adjacent to the control board 2 is L, and L = H - h. Therefore, L needs to satisfy: In other words, the dimension h of the plastic body 5 in the axial direction of the casing 11 needs to satisfy at least: to ensure that the pin 4 is within the specified deflection range to ensure the strength of the pin 4. On the other hand, the maximum dimension h of the plastic body 5 in the axial direction of the casing 11 needs to satisfy: h < A - B, that is, the dimension h of the plastic body 5 in the axial direction of the casing 11 cannot exceed the distance between the end face of the solder protruding from the control board 2 adjacent to the bottom wall 111 and the upper end face of the bottom wall 111 at most, otherwise it will affect the normal assembly and welding of the pin 4. Thus, the inventor has studied and obtained that the dimension h of the plastic body 5 in the axial direction of the casing 11 needs to satisfy:

[0058] In some embodiments, the outer peripheral contour of the plastic body 5 can be a polygon (such as Figure 3 and Figure 4 shown), circular (such as Figure 7 and Figure 8 shown) or oval. In other words, the cross-sectional area of the plastic body 5 can be a polygon, circular or oval.

[0059] Optionally, the plastic body 5 includes a first end face 52 adjacent to the control board 2 and a second end face 53 away from the control board 2. The outer peripheral contour of the first end face 52 can be a polygon (such as Figure 3 and Figure 4 shown, such as Figure 13 and Figure 14 shown), circular (such as Figure 7 and Figure 8 As shown) or elliptical, the outer peripheral contour of the second end face 53 can be polygonal (as shown) Figure 3 and Figure 4 , Figure 9 and Figure 10 As shown), round (as Figures 5 to 8 as shown) or oval (as Figure 11 and 12 As shown), the outer contour of the first end face 52 and the outer contour of the second end face 53 may be the same (as shown Figure 3 and Figure 4 ,like Figures 7 to 10 ), or different (as shown in Figure 5 and Figure 6 , Figure 11 and Figure 12 shown).

[0060] In some embodiments, the cross-sectional area of ​​the overmolded body 5 is along the direction toward the control board 2 (eg Figure 2 Alternatively, the cross-sectional area of ​​the plastic package 5 remains unchanged along the axial direction of the housing 11 (e.g. Figure 3 and Figure 4 In other words, the cross-sectional area of ​​the plastic body 5 can be constant or variable along its axial direction. Preferably, the cross-sectional area of ​​the plastic body 5 is constant along the direction toward the control board 2 (as shown in FIG. Figure 2 The angle (in the upper portion) gradually decreases, creating a smooth and uniform transition from smaller at the top to larger at the bottom, resulting in a defined angle between the overmolded body 5 and the lower end surface of the control board 2. During the injection molding process, this structure of the overmolded body 5 creates a trumpet-shaped cavity within the mold, namely, an inverted cone. This structure facilitates guiding, shaping, and securing the pins 4 during mold closing, preventing deformation and ensuring the circumferential positioning accuracy of the stator assembly 3 within the housing 11.

[0061] In some embodiments, as Figure 15 As shown, the stator assembly 3 includes a stator core 31, an insulating frame 33 and a winding 32. The insulating frame 33 is at least partially provided at one end of the stator core 31 in the axial direction (e.g., Figure 1 The upper end of the stator core 31 shown in FIG), the insulating frame 33 is away from the side of the stator core 31 (as shown in FIG. Figure 1 The upper end of the insulating frame 33 shown in FIG. 3 has a convex portion 331 and a concave portion 332 formed between adjacent convex portions 331. The winding 32 is wound around the convex portion 331 of the insulating frame 33. Optionally, there may be a plurality of convex portions 331, and the plurality of convex portions 331 are arranged at intervals along the circumference of the stator core 31.

[0062] Further, if Figure 15As shown, the plurality of pins 4 include a phase pin 43 and a ground pin 44, wherein one end of the phase pin 43 (as shown in FIG. Figure 2 The lower end of the phase pin 43 is fixed in the convex portion 331 of the insulating frame 33 and is connected to the lead wire of the winding 32. Figure 2 The upper end of the PCB is connected to the control board 2 through the bottom wall 111.

[0063] The outer circumference of the stator core 31 is provided with a groove (not shown), which runs through the upper and lower ends of the stator core 31. One end of the ground pin 44 (such as Figure 3 The lower end of the ground pin 44 can be fitted into the groove by interference fit or welding, and the other end of the ground pin 44 (such as Figure 3 The upper end of the stator core 31 (the upper end of the stator core 31) passes through the bottom wall 111 and connects to the control board 2. In the event of a leakage fault in the stator core 31, the stator core 31 can be connected to the control board 2 and the end cap along the grounding pin 44, directing the current to the ground, ensuring the safety of personnel and equipment. Specifically, the outer periphery of the phase pin 43 and the grounding pin 44 is coated with a plastic overcoat 5, thereby securing the phase pin 43 and the grounding pin 44 and reducing the probability of deformation or damage during processing, transportation, and assembly.

[0064] The following describes some specific examples of water pumps according to the present invention with reference to the accompanying drawings.

[0065] like Figures 1 to 15 As shown, the water pump includes a housing 1, a stator assembly 3, a control board 2, pins 4 and a plastic overmolding body 5. The housing 1 includes a casing 11 and an end cover, and the end cover is provided at the upper end of the casing 11 to close the casing 11. The stator assembly 3 is provided in the casing 11, and a bottom wall 111 is installed in the casing 11, and the bottom wall 111 is provided at the upper end of the stator assembly 3. The control board 2 is provided above the bottom wall 111 and installed on the lower side of the end cover. There are multiple pins 4 and they are arranged at intervals. The multiple pins 4 all pass through the bottom wall 111 upward from the stator assembly 3 and extend into the end cover. The plastic overmolding body 5 is integrally formed with the casing 11 by injection molding, and the plastic overmolding body 5 is connected to the upper surface of the bottom wall 111. The plastic overmolding body 5 wraps the portion of the outer peripheral wall of the pin 4 located on the upper side of the bottom wall 111 to fix the pin 4.

[0066] Specifically, the overmolded body 5 has a through hole 51 extending vertically therethrough. The pin 4 includes a first section 41 and a second section 42 extending in the vertical direction, with the first section 41 located below the second section 42. The lower end of the first section 41 passes through the through hole 51 and the bottom wall 111 and is connected to the stator assembly 3. The overmolded body 5 covers the outer peripheral wall of the first section 41. The upper end of the second section 42 is inserted into the controller and secured by welding. Specifically, the thickness of the outer peripheral wall on the lower side of the overmolded body 5 is greater than 0 mm and less than or equal to 5 mm, thereby improving the connection strength between the overmolded body 5, the pin 4, and the control board 2. The vertical dimension of the overmolded body 5 is greater than 10 mm to increase the length of the outer peripheral wall of the pin 4 covered by the overmolded body 5. The gap between the upper end surface of the overmolded body 5 and the lower end surface of the control board 2 is greater than or equal to 1 mm and less than or equal to 3 mm, ensuring the firmness of the welding of the pin 4 to the control board 2.

[0067] like Figure 15 As shown, the stator assembly 3 includes a stator core 31, an insulating frame 33, and windings 32. The insulating frame 33 is disposed at the upper end of the stator core 31. Both the insulating frame 33 and the stator core 31 are located below the bottom wall 111. The upper end of the insulating frame 33 has protrusions 331 and recesses 332 formed between adjacent protrusions 331. The windings 32 are wound around the protrusions 331 of the insulating frame 33. There are multiple protrusions 331, and the multiple protrusions 331 are arranged at intervals along the circumference of the stator core 31.

[0068] Specifically, the multiple pins 4 include three phase pins 43 and one ground pin 44. The lower ends of the three phase pins 43 are mounted within the protrusions 331 of the insulating frame 33 and are respectively connected to the three-phase lead wires of the winding 32. The upper ends of the three phase pins 43 extend upward through the bottom wall 111 and are secured to the control board 2 by welding. The outer circumference of the stator core 31 is provided with grooves that extend through the upper and lower ends of the stator core 31. The lower end of the ground pin 44 is welded within the grooves, while the upper end of the ground pin 44 extends upward through the bottom wall 111 and is secured to the control board 2 by welding. Accordingly, the outer circumferences of the phase pins 43 and the ground pin 44 are both coated with a plastic coating 5 to secure them and reduce the probability of deformation or damage during processing, transportation, and assembly.

[0069] The overmolded body 5 includes a first end surface 52 adjacent to the control board 2 and a second end surface 53 away from the control board 2 .

[0070] In some embodiments, as Figure 3 and Figure 4As shown, the outer contours of the first end face 52 and the second end face 53 are both polygonal. The sidewalls of the overmolded body 5 are polyhedral. The cross-sectional area of ​​the overmolded body 5 decreases gradually and evenly from bottom to top. The cross-sectional area of ​​the first end face 52 of the overmolded body 5 is equal to the cross-sectional area of ​​the pin 4. The angle between the side surface of the overmolded body 5 and the bottom wall 111 is 60°.

[0071] In other embodiments, Figure 5 and Figure 6 As shown, the outer contour of the first end face 52 is polygonal, the outer contour of the second end face 53 is circular, and the sidewall of the overmolded body 5 is a polyhedron. The cross-sectional area of ​​the overmolded body 5 gradually decreases and transitions evenly from bottom to top. The cross-sectional area of ​​the first end face 52 of the overmolded body 5 is equal to the cross-sectional area of ​​the pin 4. The angle between the side surface of the overmolded body 5 and the bottom wall 111 is 60°.

[0072] In other embodiments, Figure 7 and Figure 8 As shown, the outer contour of the first end surface 52 is circular, the outer contour of the second end surface 53 is also circular, and the sidewall of the overmolded body 5 is a conical structure. The cross-sectional area of ​​the overmolded body 5 gradually decreases and transitions evenly from bottom to top. The cross-sectional area of ​​the first end surface 52 of the overmolded body 5 is larger than the cross-sectional area of ​​the pin 4. The angle between the conical surface of the overmolded body 5 and the bottom wall 111 is 60°.

[0073] In other embodiments, Figure 9 and Figure 10 As shown, the outer contours of the first end face 52 and the second end face 53 are polygons of equal size. The sidewalls of the overmolded body 5 are polyhedrons. The cross-sectional area of ​​the overmolded body 5 is constant from bottom to top, and the cross-sectional area of ​​the first end face 52 of the overmolded body 5 is greater than the cross-sectional area of ​​the pin 4. The side surfaces of the overmolded body 5 are perpendicular to the bottom wall 111.

[0074] In other embodiments, Figure 11 and Figure 12 As shown, the outer contour of the first end face 52 is polygonal, the outer contour of the second end face 53 is elliptical, and the sidewall of the overmolded body 5 is a polyhedron. The cross-sectional area of ​​the overmolded body 5 gradually decreases and transitions evenly from bottom to top. The cross-sectional area of ​​the first end face 52 of the overmolded body 5 is equal to the cross-sectional area of ​​the pin 4. The angle between the side surface of the overmolded body 5 and the bottom wall 111 is 60°.

[0075] In other embodiments, Figure 11 and Figure 12As shown, the outer contour of the first end face 52 is polygonal, the outer contour of the second end face 53 is elliptical, and the sidewall of the overmolded body 5 is a polyhedron. The cross-sectional area of ​​the overmolded body 5 gradually decreases and transitions evenly from bottom to top. The cross-sectional area of ​​the first end face 52 of the overmolded body 5 is equal to the cross-sectional area of ​​the pin 4. The angle between the side surface of the overmolded body 5 and the bottom wall 111 is 60°.

[0076] In other embodiments, Figure 13 and Figure 14 As shown, the outer contours of the first end face 52 and the second end face 53 are both polygonal. The sidewalls of the overmolded body 5 are polyhedral. The cross-sectional area of ​​the overmolded body 5 decreases gradually and evenly from bottom to top. The cross-sectional area of ​​the first end face 52 of the overmolded body 5 is larger than the cross-sectional area of ​​the pin 4. The angle between the side surface of the overmolded body 5 and the bottom wall 111 is 60°.

[0077] A vehicle according to an embodiment of the present invention includes a water pump according to an embodiment of the present invention.

[0078] According to the vehicle of the embodiment of the present invention, the pin 4 in the water pump is not easily deformed or even damaged, which reduces the risk of quality accidents and improves the reliability of the water pump during operation.

[0079] In the description of the present invention, it should 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" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0081] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0082] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0083] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0084] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A water pump, characterized in that: include: A housing, the housing comprising a casing and an end cover, the end cover being provided at one axial end of the casing, and the casing comprising a bottom wall; a stator assembly, the stator assembly being arranged in the housing, a control panel, the control panel being arranged in the housing, a plurality of pins arranged at intervals, the pins extending axially along the housing and extending from the stator assembly into the end cover, one end of the pin connected to the stator assembly, and the other end of the pin passing through the bottom wall and connected to the control board; an overmolded body, the overmolded body covering a periphery of a portion of the pin, the overmolded body being connected to a side of the bottom wall away from the stator assembly, and the overmolded body being spaced apart from the control board in the axial direction of the housing; The distance between the end face of the control board adjacent to the bottom wall and the side face of the bottom wall adjacent to the control board is A. The other end of the pin is connected to the control board via solder. The distance that the solder protrudes from the end face of the control board adjacent to the bottom wall is B. The distance between the end of the other end of the pin and the side face of the bottom wall adjacent to the control board is H. The dimension of the overmolded body in the axial direction of the housing is h, and the following conditions are satisfied: Wherein 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, and I is the section moment of inertia.

2. The water pump according to claim 1, characterized in that The housing and the overmolded body are integrally formed by injection molding.

3. The water pump according to claim 1, characterized in that The overmolded body has a through hole therein, a portion of the pin fits in the through hole, and a distance between an inner wall surface of the through hole and an outer peripheral surface of the overmolded body is greater than 0 mm and less than or equal to 5 mm.

4. The water pump according to claim 1, characterized in that The size of the overmolded body in the axial direction of the housing is greater than 10 mm.

5. The water pump according to claim 1, characterized in that A distance between an end surface of the overmolded body adjacent to the control board and an end surface of the control board adjacent to the overmolded body is greater than or equal to 1 mm.

6. The water pump according to claim 5, characterized in that A distance between an end surface of the overmolded body adjacent to the control board and an end surface of the control board adjacent to the overmolded body is greater than or equal to 1 mm and less than or equal to 3 mm.

7. The water pump according to any one of claims 1 to 6, characterized in that: The pin includes a first section and a second section connected in sequence along its extension direction, one end of the first section is connected to the stator assembly, the other end of the first section passes through the bottom wall and is connected to one end of the second section, the other end of the second section is connected to the control board, and the plastic body is covered on the outer periphery of the first section.

8. The water pump according to any one of claims 1 to 6, characterized in that: The overmolded body includes a first end face adjacent to the control board and a second end face away from the control board. The outer contour of the first end face is polygonal, circular or elliptical, and the outer contour of the second end face is polygonal, circular or elliptical. The outer contour of the first end face and the outer contour of the second end face are the same or different.

9. The water pump according to any one of claims 1 to 6, characterized in that: The outer contour of the inclusion body is polygonal, circular or elliptical.

10. The water pump according to any one of claims 1 to 6, characterized in that: The cross-sectional area of ​​the overmolded body gradually decreases in a direction toward the control board, or the cross-sectional area of ​​the overmolded body remains unchanged in an axial direction of the housing.

11. The water pump according to any one of claims 1 to 6, characterized in that: The stator assembly includes a stator core, an insulating frame, and a winding. The insulating frame is at least partially provided at one end of the stator core in the axial direction. The insulating frame has a convex portion and a concave portion formed between adjacent convex portions. The winding is wound around the convex portion of the insulating frame. The plurality of pins include a phase pin, one end of which is fixed in the protrusion of the insulating frame and connected to the lead wire of the winding, and the other end of which passes through the bottom wall and is connected to the control board.

12. The water pump according to claim 11, characterized in that The outer peripheral surface of the stator core is provided with a groove, and the plurality of pins further include a grounding pin, one end of the grounding pin is fitted in the groove, and the other end of the grounding pin passes through the bottom wall and is connected to the control board.

13. A vehicle, characterized in that: The water pump comprises the water pump according to any one of claims 1 to 12.

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