Stator assembly and electronic water pump

Abstract

The utility model discloses a kind of stator assembly and electronic water pump in the technical field of electronic water pump, including insulating support, iron core, winding and pin, the top of insulating support is provided with the wiring area matched with the overbridge line of winding, the bottom of insulating support is provided with terminal cover, iron core is set on insulating support, winding is set on iron core and located between wiring area and terminal cover;Terminal cover is provided with the wire slot matched with the lead-out wire of winding, the top of pin is inserted in the inner cavity of terminal cover, and pin is electrically connected with lead-out wire.The utility model can avoid the influence of the deformation of the top of insulating support on the position degree of pin, and then make pin have higher position degree.

Description

Technical Field

[0001] This utility model relates to the field of electronic water pump technology, specifically to a stator assembly and an electronic water pump. Background Technology

[0002] The stator assembly is the core drive component of an electric water pump, directly affecting the pump's performance and operating efficiency.

[0003] The stator assembly consists of an insulating support, an iron core, and windings. The iron core is fixedly embedded in the insulating support, and the windings are wound around the iron core. For a three-phase electric water pump, the electronic assembly has up to 12 windings (U-phase winding, V-phase winding, and W-phase winding). Windings of the same type are connected by bridging wires, which are wound around the wiring area at the end of the insulating support to provide tension. Additionally, a pin is installed at the end of the insulating support; one end of this pin connects to the lead wire of the winding, electrically connecting the winding to the PCB board below the housing.

[0004] Patent document CN222339088U discloses a stator assembly and an electronic water pump. In this stator assembly, the bridging wire of the winding and the pin are set at the same end of the insulating support. When the winding is wound, the tension of the bridging wire of the winding will exert a radial force on the end of the insulating support and cause the end of the insulating support to deform. This will reduce the positional accuracy of the pin during installation, thereby affecting the electrical connection between the pin and the PCB board.

[0005] Therefore, how to improve the positioning accuracy of the pins has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of this utility model is to provide a stator assembly to address the above-mentioned technical problems.

[0007] The technical solution adopted by this utility model is as follows: a stator assembly, including: an insulating support, an iron core, a winding, and a pin. The top of the insulating support is provided with a routing area that cooperates with the bridging wire of the winding. The bottom of the insulating support is provided with a terminal cover. The iron core is disposed on the insulating support. The winding is disposed on the iron core and located between the routing area and the terminal cover. The terminal cover is provided with a wire groove that cooperates with the lead wire of the winding. The top of the pin is inserted into the inner cavity of the terminal cover, and the pin is electrically connected to the lead wire.

[0008] Preferably, the pin includes a plate body, the top of the plate body is provided with a wiring groove that is larger at the top and smaller at the bottom, the two side walls of the top of the wiring groove are provided with barbs, and the distance between the two barbs is smaller than the radial dimension of the lead wire, and the bottom of the plate body is provided with pin feet.

[0009] Preferably, the top of the plate is provided with two elastic arms that can move away from or close to each other, and a wiring groove is formed between the two elastic arms, and the width of the wiring groove gradually decreases from top to bottom.

[0010] Preferably, a buckle that mates with the inner wall of the wiring cover is provided on the side of the two elastic arms that are opposite to each other.

[0011] Preferably, there are two plates, which are arranged along the radial direction of the insulating support, and the elastic arms at the top of the two plates are fixedly connected one-to-one.

[0012] Preferably, the plate body is L-shaped as a whole, and a limiting stop surface is formed on one side of the plate body to cooperate with the lower end face of the wiring cover.

[0013] Preferably, the bottom end of the plate is fixedly connected to two pins, which are fisheye pins.

[0014] Preferably, the stator assembly further includes an isolation tank formed by injection molding. The isolation tank includes an upper end cover, a connecting cylinder, and a lower end cover. The upper end cover is plastic-coated on the top of the insulating support, the lower end cover is plastic-coated on the bottom of the insulating support, and the connecting cylinder is plastic-coated on the inner side of the insulating support. The connecting cylinder is fixedly connected between the upper end cover and the lower end cover.

[0015] Preferably, the upper end cap is provided with a liquid passage hole that communicates with the inner cavity of the connecting cylinder.

[0016] The second objective of this invention is to provide an electronic water pump, including the stator assembly described above.

[0017] The beneficial effects of this utility model are:

[0018] This utility model adopts a spatial division method. A wiring area is set at the top of the insulating bracket for the circumferential routing of the bridge wire between the two windings and to maintain a certain tension of the bridge wire. A terminal cover is set at the bottom of the insulating bracket, and a pin is inserted and connected inside the terminal cover. This makes the wiring area and the pin located at two independent positions on the insulating bracket, which can avoid the influence of the deformation of the top of the insulating bracket on the position accuracy of the pin, thereby giving the pin a high position accuracy. Attached Figure Description

[0019] Figure 1 This is one of the structural schematic diagrams of the stator assembly of this utility model;

[0020] Figure 2 This is the second structural schematic diagram of the stator assembly of this utility model;

[0021] Figure 3 This is a three-dimensional schematic diagram of the stator assembly of this utility model;

[0022] Figure 4 This is a 3D diagram of the pin;

[0023] Figure 5 This is a three-dimensional schematic diagram of the isolation tank;

[0024] Figure 6 This is a schematic diagram showing the connection between the pin and the junction box.

[0025] Explanation of the reference numerals in the figure:

[0026] 10. Insulating bracket; 11. Wiring area; 12. Wiring cover; 13. Cable tray;

[0027] 20. Iron core;

[0028] 30. Winding; 31. Bridge wire; 32. Lead wire;

[0029] 40. Pin; 41. Plate; 42. Wiring groove; 43. Spike; 44. Pin foot; 45. Elastic arm; 46. Inverted buckle; 47. Limiting stop surface;

[0030] 50. Isolation tank; 51. Upper end cover; 52. Connecting cylinder; 53. Lower end cover; 54. Liquid passage hole; 55. Weight reduction hole. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0032] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] Examples, such as Figures 1-6 As shown, a stator assembly includes: an insulating support 10, an iron core 20, a winding 30, and pins 40; a wiring area 11 is formed at the top of the insulating support 10 to cooperate with the bridging wire 31 of the winding 30, and a terminal cover 12 is formed at the bottom of the insulating support 10; the iron core 20 is embedded in the insulating support 10, the winding 30 is wound on the iron core 20, and in the axial direction, the winding 30 is located between the wiring area 11 and the terminal cover 12.

[0036] A wire groove 13 is provided on the wiring cover 12 to cooperate with the lead wire 32 of the winding 30. The top end of the pin 40 is inserted into the inner cavity of the wiring cover 12, and the pin 40 is electrically connected to the lead wire 32.

[0037] This utility model adopts a spatial division method. A wiring area 11 is provided at the top of the insulating bracket 10 for the wiring of the bridging wire 31 between the two windings 30 in the circumferential direction, and to maintain a certain tension of the bridging wire 31. A terminal cover 12 is provided at the bottom of the insulating bracket 10, and a pin 40 is inserted and connected in the terminal cover 12. This makes the wiring area 11 and the pin 40 located at two independent positions on the insulating bracket 10, which can avoid the influence of the deformation of the top of the insulating bracket 10 on the position accuracy of the pin 40, thereby giving the pin 40 a high position accuracy.

[0038] Specific embodiment 1, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, a stator assembly includes: an insulating support 10, an iron core 20, a winding 30, and a pin 40.

[0039] The insulating support 10 is generally ring-shaped, and multiple teeth are formed inside the insulating support 10. The multiple teeth are evenly distributed along the circumference of the insulating support 10. For example, the number of teeth is 12.

[0040] A wiring area 11 is formed at the top of the insulating support 10. This wiring area 11 can cooperate with the bridging wire 31 of the winding 30. That is, the bridging wire 31 between the same two windings 30 is wound around the outer wall of the wiring area 11, and the bridging wire 31 has appropriate tension. It should be noted that the specific configuration of the wiring area 11 is prior art and will not be described in detail here.

[0041] A wiring cover 12 is formed at the bottom of the insulating support 10. The bottom of the wiring cover 12 is open, and there are multiple wiring covers 12, such as three, which are distributed at intervals along the circumference of the insulating support 10.

[0042] The iron core 20 is embedded in the insulating support 10.

[0043] The winding 30 is wound on the iron core 20, that is, the winding 30 is wound on the teeth of the insulating support 10, and in the axial direction, the winding 30 is located between the wiring area 11 and the terminal cover 12; the bridging wire 31 of the two identical windings 30 is located at the top of the insulating support 10, and the lead wire 32 of the winding 30 is located at the bottom of the insulating support 10.

[0044] A wire groove 13 is formed at the bottom of the wiring cover 12. The wire groove 13 extends horizontally through the wiring cover 12 along its width direction, that is, the wire groove 13 is set approximately in the circumferential direction and communicates with the inner cavity of the wiring cover 12. The lead wire 32 of the winding 30 passes through the wire groove 13, and the groove width dimension of the wire groove 13 is equal to the radial dimension of the lead wire 32, so that the lead wire 32 can be fixed in the radial direction of the insulating bracket 10.

[0045] The top end of the pin 40 is inserted into the inner cavity of the wiring cover 12. The pin 40 includes a plate body 41. A wiring groove 42 with a larger top and a smaller bottom is provided at the top of the plate body 41. Bars 43 are provided on the two side walls of the top of the wiring groove 42. The distance between the two bars 43 is less than the radial dimension of the lead wire 32, so that when the pin 40 is inserted into the wiring cover 12, the two bars 43 can pierce the enameled wire on the outside of the lead wire 32 and make the pin 40 clamp and fix the lead wire 32, that is, the pin 40 is electrically connected to the lead wire 32. A pin 44 is provided at the bottom end of the plate body 41 for electrically connecting the pin 40 to the PCB board.

[0046] Preferred, such as Figure 4 and Figure 6As shown, the pin 40 includes a plate 41, elastic arms 45, and pins 44. The ratio of the number of plate 41 to elastic arms 45 is 1:2, and the two elastic arms 45 are symmetrically arranged on the left and right sides of the top of the plate 41. The bottom end of the elastic arm 45 is integrally formed with the plate 41, and the top ends of the two elastic arms 45 can move away from or close to each other, so that a wiring groove 42 with a variable groove width is formed between the two elastic arms 45. From top to bottom, the groove width of the wiring groove 42 gradually decreases, so that the two elastic arms 45 can clamp and fix the lead wire 32, thereby realizing the electrical connection between the lead wire 32 and the pin 40.

[0047] There are two plates 41, each arranged radially along the insulating support 10, and each plate 41 has two pins 44 fixedly connected to its bottom end, preferably fisheye pins. The two plates 41 of the pin 40 are arranged in parallel, and the two elastic arms 45 at the top of the two plates 41 are fixedly connected one-to-one. The plate 41 is generally L-shaped, and a limiting stop surface 47 is formed on one side of the plate 41 to cooperate with the lower end face of the wiring cover 12, so as to limit the insertion depth of the pin 40 in the wiring cover 12 by the stopping cooperation between the upper limit stop surface 47 of the plate 41 and the lower end face of the wiring cover 12.

[0048] More preferably, a buckle 46 is provided on the side of the two elastic arms 45 that are opposite to each other, which cooperates with the inner wall of the wiring cover 12, so as to improve the stability of the connection between the pin 40 and the wiring cover 12 through the frictional cooperation between the buckle 46 and the inner wall of the wiring cover 12.

[0049] Examples, such as Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a stator assembly includes: an insulating support 10, an iron core 20, a winding 30, a pin 40, and an isolation tank 50.

[0050] A wiring area 11 is formed at the top of the insulating bracket 10 to cooperate with the bridging wire 31 of the winding 30, and a wiring cover 12 is formed at the bottom of the insulating bracket 10.

[0051] The iron core 20 is embedded in the insulating support 10.

[0052] The winding 30 is wound on the iron core 20 and located between the wiring area 11 and the terminal cover 12.

[0053] A wire groove 13 is provided on the wiring cover 12 to cooperate with the lead wire 32 of the winding 30. The top end of the pin 40 is inserted into the inner cavity of the wiring cover 12, and the pin 40 is electrically connected to the lead wire 32.

[0054] The isolation tank 50 is formed on the outside of the entire stator assembly by injection molding. The isolation tank 50 includes an upper end cover 51, a connecting cylinder 52 and a lower end cover 53. The upper end cover 51 is plastic-coated on the top of the insulating support 10 and covers the outside of the wiring area 11. The lower end cover 53 is plastic-coated on the bottom of the insulating support 10. The connecting cylinder 52 is plastic-coated on the inside of the insulating support 10 and is fixedly connected between the upper end cover 51 and the lower end cover 53.

[0055] This design is based on the fact that: after the stator assembly is plastic-coated, the copper wires and iron core of the stator assembly can be better cooled, and the air gap of the motor can be reduced to 0.5mm-1.5mm, which helps to reduce the radial dimension of the motor, thereby reducing the size of the electric water pump.

[0056] Preferably, the upper end cover 51 is provided with a liquid passage hole 54 communicating with the inner cavity of the connecting cylinder 52. This liquid passage hole 54 can be used as a cooling circuit to cool the rotor in the inner cavity of the stator assembly. At the same time, a bearing made of graphite is fixedly connected to the middle of the upper end cover 51 to increase the torque and force of the radial and axial engagement of the bearing and to facilitate injection molding.

[0057] More preferably, weight-reducing holes are provided on the upper end cover 51 and the lower end cover 53 to reduce the weight of the electric water pump.

[0058] An example is an electronic water pump that includes the stator assembly described above.

[0059] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A stator assembly, characterized in that, include: The components include an insulating bracket (10), an iron core (20), a winding (30), and a pin (40). The top of the insulating bracket (10) is provided with a wiring area (11) that cooperates with the bridging wire (31) of the winding (30). The bottom of the insulating bracket (10) is provided with a wiring cover (12). The iron core (20) is mounted on the insulating bracket (10). The winding (30) is mounted on the iron core (20) and located between the wiring area (11) and the wiring cover (12). The wiring cover (12) is provided with a wire groove (13) that cooperates with the lead wire (32) of the winding (30). The top of the pin (40) is inserted into the inner cavity of the wiring cover (12), and the pin (40) is electrically connected to the lead wire (32).

2. A stator assembly according to claim 1, characterized in that, The pin (40) includes a plate (41), the top of the plate (41) is provided with a wiring groove (42) that is larger at the top and smaller at the bottom, and barbs (43) are provided on the two side walls of the top of the wiring groove (42), and the distance between the two barbs (43) is smaller than the radial dimension of the lead wire (32). The bottom of the plate (41) is provided with a pin (44).

3. A stator assembly according to claim 2, characterized in that, The top of the plate (41) is provided with two elastic arms (45) that can move away from or close to each other, and a wiring groove (42) is formed between the two elastic arms (45), and the width of the wiring groove (42) gradually decreases from top to bottom.

4. A stator assembly according to claim 3, characterized in that, An undercut (46) is provided on one side of the two elastic arms (45) that are opposite to each other, which cooperates with the inner wall of the wiring cover (12).

5. A stator assembly according to claim 4, characterized in that, There are two plates (41), which are arranged along the radial direction of the insulating support (10), and the elastic arms (45) at the top of the two plates (41) are fixedly connected one-to-one.

6. A stator assembly according to claim 2, characterized in that, The plate (41) is L-shaped in general, and a limiting stop surface (47) is formed on one side of the plate (41) to cooperate with the lower end face of the wiring cover (12).

7. A stator assembly according to claim 2, characterized in that, The bottom end of the plate (41) is fixedly connected to two pins (44), which are fish-eye pins.

8. A stator assembly according to any one of claims 2-7, characterized in that, The stator assembly also includes an injection-molded isolation tank (50), which includes an upper end cover (51), a connecting cylinder (52), and a lower end cover (53). The upper end cover (51) is plastic-coated on the top of the insulating support (10), the lower end cover (53) is plastic-coated on the bottom of the insulating support (10), and the connecting cylinder (52) is plastic-coated on the inner side of the insulating support (10). The connecting cylinder (52) is fixedly connected between the upper end cover (51) and the lower end cover (53).

9. A stator assembly according to claim 8, characterized in that, The upper end cap (51) is provided with a liquid passage hole (54) that communicates with the inner cavity of the connecting cylinder (52).

10. An electronic water pump, characterized in that, Includes a stator assembly as described in any one of claims 1-9.

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