A stator assembly with an improved coil carrier structure for an electric water pump

Abstract

The utility model provides a kind of improved stator assembly of coil support structure and motor water pump, the stator assembly includes core, several coil supports and enameled wire being arranged on core, coil support includes cladding main body part and first isolation part, the first limiting portion and the second limiting portion in the radial inner wall surface inside yoke portion are respectively equipped in the left and right sides of first isolation part, core is strip, after being rolled, the first limiting portion and the second limiting portion of adjacent coil support mutually abut along the circumference direction.This improved stator assembly of coil support structure, when enameled wire is wound up, the first limiting portion and the second limiting portion on coil support will gradually close along with the process of core rolling and realize mutually abutting along the circumference direction after rolling, prevent the equipment of applying the stator assembly from the condition of electric leakage due to enameled wire sliding and contacting with core in use process, and its overall result is stable and reliable.

Description

Technical Field

[0001] This utility model relates to a stator assembly with an improved coil frame structure, and more particularly to an electric water pump using the improved coil frame structure, with IPC classification number F04D 13 / 06 (2006.01). Background Technology

[0002] Existing electric water pump stator assemblies typically include an iron core, a coil frame fixed to the iron core, and enameled wire wound around the coil frame. The iron core is usually a chain-like structure. During stator assembly, the coil frame is first fixed to the chain-like iron core, then the enameled wire is wound around it, and finally the chain-like iron core is rolled into a ring-shaped stator assembly. In existing stator assemblies, after the iron core is rolled, the enameled wire easily slips off the coil frame and comes into direct contact with the iron core, posing a significant risk of leakage. Therefore, there is a need for improvement. Utility Model Content

[0003] To address the problems described in the background section, this utility model provides the following technical solution:

[0004] An improved stator assembly with coil frame structure includes an iron core, several coil frames disposed on the iron core, and enameled wire wound on the coil frames. The coil frame includes a main body portion covering the teeth of the iron core and a first isolation portion connected to the main body portion and located inside the yoke portion of the iron core to isolate the iron core from the enameled wire. The first isolation portion is characterized in that: a first limiting portion and a second limiting portion are respectively provided on the left and right sides of the first isolation portion, located within the radial inner wall surface of the yoke portion; the iron core is strip-shaped, and after being rolled into a circle, the first limiting portion and the second limiting portion of adjacent coil frames abut against each other circumferentially.

[0005] The stator assembly with the improved coil frame structure of this utility model has a coil frame with a first limiting part and a second limiting part on its iron core. When the enameled wire is wound and the iron core is rolled into a circle, the first limiting part and the second limiting part on the coil frame will gradually approach each other as the iron core is rolled into a circle and achieve circumferential contact after the circle is completed. This prevents leakage caused by the enameled wire slipping and contacting the iron core during the use of the equipment using this stator assembly, thereby improving the stability of the equipment using this stator assembly.

[0006] Furthermore, the first limiting part and the second limiting part are columnar bodies that are symmetrical about each other along the central axis plane M of the main body.

[0007] Furthermore, the outer surfaces of the first limiting part and the second limiting part are respectively provided with a first arc surface and a second arc surface, and the first arc surface and the second arc surface abut against each other in the circumferential direction.

[0008] Furthermore, the first limiting part is a columnar column, and the second limiting part is an inner groove that is adapted to the first limiting part.

[0009] Furthermore, the coil frame is injection molded onto the iron core.

[0010] Furthermore, when projected radially, the axial contours of the yoke do not exceed the axial contours of the first limiting portion and the second limiting portion.

[0011] An electric water pump is characterized by comprising a pump body, a rotor assembly rotatably mounted on the pump body, and a stator assembly with any of the above-mentioned improved coil frame structures, wherein the stator assembly is fixedly mounted on the pump body.

[0012] The more specific design and technical effects of this utility model are further explained in conjunction with the accompanying drawings in the specific embodiments. Attached Figure Description

[0013] Figure 1 This is a top view of the stator assembly of this utility model;

[0014] Figure 2 yes Figure 1 A magnified view of part A in the diagram;

[0015] Figure 3 This is a top view of the iron core coil of this utility model.

[0016] Figure 4 yes Figure 3 A magnified view of part B in the diagram;

[0017] Figure 5 yes Figure 3 A magnified view of part of C;

[0018] Figure 6 This is a front view of the iron core of this utility model;

[0019] Figure 7 yes Figure 6 A magnified view of part of D;

[0020] Figure 8 This is a cross-sectional view of the water pump of this utility model;

[0021] in:

[0022] 21-First limiting part, 22-Second limiting part, 23-First arc surface, 24-Second arc surface, 100-Pump body, 200-Stator assembly, 210-Iron core, 212-Yoke, 213-Shoe part, 220-Coil frame, 221-Main body, 222-First isolation part, 223-Second isolation part, 230-Enameled wire, 300-Rotor assembly Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] See Figures 1 to 5 This utility model discloses an improved stator assembly 200 with an improved coil frame structure. The stator assembly 200 includes an iron core 210, several coil frames 220 fixed on the iron core 210, and enameled wire 230 wound on the coil frames 220. The iron core 210 is strip-shaped and includes teeth (not shown), a yoke 212 connected to the teeth 210 and located radially outward of the teeth, and a boot 213 connected to the teeth 210 and located radially inward of the teeth. The coil frames 220 include a fixed... The stator assembly comprises a columnar main body 221 fixed on the toothed portion, an arc-shaped first isolation portion 222 connected to the main body 221 and located inside the yoke portion 212 of the iron core to isolate the iron core 210 from the enameled wire 230, and an arc-shaped second isolation portion 223 connected to the main body 221 and located outside the boot portion 213 of the iron core to isolate the iron core 210 from the enameled wire 230. Further, the first isolation portion 222 has a first limiting portion 21 and a second limiting portion 22 located within the radial inner wall surface of the yoke portion 212 on its left and right sides, respectively. During stator assembly, a coil frame 220 is first fixed on the iron core 210, and then the enameled wire 230 is wound around the coil frame 220. After winding the enameled wire 230, the iron core 210 is rolled into a circle. After the iron core 210 is rolled into a circle, the adjacent first limiting portions 21 and second limiting portions 22 abut against each other circumferentially.

[0025] The stator assembly with the improved coil frame structure of this utility model has a coil frame with a first limiting part and a second limiting part on its iron core. When the enameled wire is wound and the iron core is rolled into a circle, the first limiting part and the second limiting part on the coil frame will gradually approach each other as the iron core is rolled into a circle and achieve circumferential contact after the circle is completed. This prevents leakage caused by the enameled wire slipping and contacting the iron core during the use of the equipment using this stator assembly, thereby improving the stability of the equipment using this stator assembly.

[0026] Furthermore, see Figures 3 to 5In this invention, the first limiting part 21 and the second limiting part 22 are columnar bodies symmetrically arranged along the central axis plane M of the main body 221. This design reduces the occurrence of glue shortage during the manufacturing of the coil frame 220, thereby improving the overall pass rate of water pump production. Of course, as another embodiment, the first limiting part can be designed as a columnar column, and the second limiting part can be designed as an inner groove located on the first isolation part 222 and adapted to the columnar column of the first limiting part, which can also achieve the above-mentioned effect.

[0027] Furthermore, see Figure 4 and Figure 5 In this invention, the first limiting part 21 of the first isolation part 222 is provided with a first arc surface 23, and the second limiting part 22 is provided with a second arc surface 24. The first arc surface 23 and the second arc surface 24 are symmetrically arranged, and after the iron core 210 is rolled, the adjacent first arc surface 23 and the second arc surface 24 abut against each other circumferentially. This design reduces the risk of breakage due to collision between the first and second limiting parts during iron core rolling, thus improving the overall yield rate of water pump production.

[0028] Furthermore, see Figure 3 To ensure that the coil frame 220 is accurately fixed on the iron core 210 and to prevent the coil frame 220 from moving or being improperly positioned during the rolling of the iron core 210, which could lead to a collision between the first limiting part 21 and the second limiting part 22, the coil frame 220 of this utility model is injection molded onto the iron core 210.

[0029] See Figure 6 and Figure 7 To prevent the enameled wire 230 from crossing the first limit 21 and the second limit 11 and contacting the iron core 210 when the iron core 210 is rolled, and to further improve the stability of the water pump operation, the axial contour of the yoke 212 of the stator assembly of this utility model does not exceed the axial contour of the first limit 21 and the second limit 22 when the radial projection is made.

[0030] See Figure 8 This utility model discloses an electric water pump, which includes a pump body 100, the aforementioned stator assembly 200, and a rotor assembly 300 rotatably mounted on the pump body 100. By optimizing the stator assembly 200, this utility model reduces the possibility of leakage during operation and improves the stability of the electric water pump.

Claims

1. A stator assembly with an improved coil frame structure, comprising an iron core (210), a plurality of coil frames (220) disposed on the iron core (210), and enameled wire (230) wound on the coil frames (220), wherein the coil frame (220) comprises a main body portion (221) covering the teeth of the iron core and a first isolation portion (222) connected to the main body portion (221) and located inside the yoke portion (212) of the iron core to isolate the iron core (210) from the enameled wire (230), characterized in that: The first isolation part (222) is provided with a first limiting part (21) and a second limiting part (22) on the left and right sides respectively located within the radial inner wall surface of the yoke part (212). The iron core (210) is strip-shaped. After being rolled into a circle, the first limiting part (21) and the second limiting part (22) of the adjacent coil frame (220) abut against each other in the circumferential direction.

2. The stator assembly with the improved coil frame structure according to claim 1, characterized in that: The first limiting part (21) and the second limiting part (22) are columnar bodies that are symmetrical about each other along the central axis plane M of the main body part (221).

3. The stator assembly with the improved coil frame structure according to claim 2, characterized in that: The outer surfaces of the first limiting part (21) and the second limiting part (22) are respectively provided with a first arc surface (23) and a second arc surface (24), and the first arc surface (23) and the second arc surface (24) abut against each other in the circumferential direction.

4. The stator assembly with the improved coil frame structure according to claim 1, characterized in that: The first limiting part (21) is a columnar column, and the second limiting part (22) is an inner groove that is adapted to the first limiting part (21).

5. The stator assembly with the improved coil frame structure according to any one of claims 1-4, characterized in that: The coil frame (220) is injection molded onto the iron core (210).

6. The stator assembly with the improved coil frame structure according to any one of claims 1-4, characterized in that: When projected radially, the axial contours of the yoke (212) do not exceed the axial contours of the first limiting part (21) and the second limiting part (22).

7. An electric water pump, characterized in that: It includes a pump body (100), a rotor assembly (300) rotatably mounted on the pump body (100), and a stator assembly with an improved coil frame structure as described in any one of claims 1-6, the stator assembly being fixedly mounted on the pump body (100).

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