A terminal and a coil assembly and an electric water pump using the same

Abstract

A terminal and a coil assembly and an electric water pump using the terminal are disclosed. The terminal includes a main body with a first recessed portion formed by a downward indentation on one side of its front end face; a plug-in portion, which is a plate-like body extending downward from the side of the main body without the first recessed portion; and a crimping portion, which extends downward from the side of the main body with the first recessed portion and is folded up, with a second recessed portion formed by a downward indentation on its end face facing the main body, the second recessed portion being opposite to the first recessed portion. This utility model discloses a terminal in which the main body and the crimping portion are respectively provided with a first recessed portion and a second recessed portion. When an enameled wire passes through the first recessed portion, the crimping portion is crimped and butt-welded towards the main body, thus housing the enameled wire within the first and second recessed portions to achieve a conductive connection between the terminal and the enameled wire. This solves the problem of difficulty in welding the terminal and the enameled wire or the easy detachment after welding, improving the stability of the connection between the terminal and the enameled wire while facilitating automated assembly of the terminal and the enameled wire.

Description

Technical Field

[0001] This utility model relates to a terminal, and more particularly to a coil assembly and an electric water pump using the terminal, which is classified as H01R 12 / 405 (2006.01). Background Technology

[0002] Existing electric water pump coil assemblies typically include an iron core, a coil frame fixed to the iron core, enameled wire wound around the coil frame, and terminals fixed to the coil frame. During assembly, the terminals are usually connected to the enameled wire by soldering. However, because the terminals are made of copper, when soldering them to aluminum enameled wire or copper-clad aluminum enameled wire, the two are difficult to weld together, or the welded parts easily detach and separate, leading to an open circuit. Currently, there is no good solution. Utility Model Content

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

[0004] A terminal is characterized in that it comprises: a plate-shaped main body portion having a first recessed portion formed by a downward indentation on one side of its front end face; a plug-in portion being a plate-shaped body extending downward from the side of the main body portion not having the first recessed portion; and a crimping portion being a portion extending downward from the side of the main body portion having the first recessed portion and folded up, having a second recessed portion formed by a downward indentation on its end face facing the main body portion, the second recessed portion being opposite to the first recessed portion.

[0005] This utility model discloses a terminal, wherein the main body and the crimping part are respectively provided with a first concave part and a second concave part. When the enameled wire passes through the first concave part, the crimping part is crimped and welded towards the main body to accommodate the enameled wire in the first concave part and the second concave part, so as to realize the conductive connection between the terminal and the enameled wire. This solves the problem that the terminal and the enameled wire are difficult to weld or are easy to fall off after welding. It improves the connection stability between the terminal and the enameled wire and facilitates the automated assembly of the terminal and the enameled wire.

[0006] Furthermore, the bottom surface of the first concave portion is provided with several recessed first grooves, and the bottom surface of the second concave portion is provided with several recessed second grooves.

[0007] Furthermore, when the crimped portion is pressed against the main body to be basically parallel, the second groove is misaligned with the first groove.

[0008] Furthermore, the main body also has a terminal block extending upwards on the end face opposite to the plug-in part.

[0009] Furthermore, the terminal block includes a connecting portion that extends backward away from the crimping portion and bends upward to form a connecting portion that extends upward at one end of the connecting portion to form a columnar contact portion.

[0010] Furthermore, the length of the first recess is greater than the length of the second recess, and the first recess is also provided with an inclined guide surface near the terminal block.

[0011] A coil assembly includes an iron core, a coil frame fixed on the iron core, and an enameled wire wound on the coil frame. The assembly is characterized by further including any of the aforementioned terminals, with the enameled wire passing through the terminals and at least partially accommodated in a first recess and a second recess. The depth of the first recess is h1, the depth of the second recess is h2, and the wire diameter of the enameled wire is φ, satisfying (h1+h2) / φ≥0.6.

[0012] Furthermore, the enameled wire is aluminum enameled wire.

[0013] Furthermore, if the width of the openings of both the first and second recesses is L, then φ is satisfied. 2 *π / 4*(h1+h2)≤L≤φ 2 / (h1+h2).

[0014] An electric water pump includes a pump body, a rotor assembly rotatably mounted on the pump body, and a pump cover on the pump body, characterized in that it further includes a coil assembly of any one of the above, the coil assembly being fixed to the pump body.

[0015] 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

[0016] Figure 1 This is a three-dimensional structural diagram of the terminal of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the terminal and the enameled wire after spot welding of this utility model;

[0018] Figure 3 yes Figure 2 Sectional view of AA;

[0019] Figure 4 This is a three-dimensional structural schematic diagram of the coil assembly of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the electric water pump of this utility model;

[0021] in:

[0022] 10-Coil assembly, 20-Pump body, 30-Rotor assembly, 40-Pump cover, 100-Terminal, 110-Main body, 111-First recessed portion, 112-First groove, 113-Inclined surface, 120-Plug-in portion, 130-Crimping portion, 131-Second recessed portion, 132-Second groove, 140-Terminal post, 141-Connecting portion, 142-Electrical connection portion, 200-Iron core, 300-Coil frame, 400-Enameled wire 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] This utility model discloses a terminal, see Figure 1 and Figure 2 The terminal 100 includes a plate-shaped main body 110, a plate-shaped insertion portion 120 extending below the main body 110, and a crimping portion 130 folded up from the side of the main body 110. The main body 110 has a first recessed portion 111 formed by a downward indentation on one side of its front end face. Similarly, the crimping portion 130 has a second recessed portion 131 formed by a downward indentation on its end face facing the main body 110. After the crimping portion 130 is bent closer to the main body 110, the second recessed portion 131 is positioned opposite to the first recessed portion 111. It should be noted that after the crimping portion 130 is bent towards the main body 110, the second recessed portion 131 and the first recessed portion 111 being positioned opposite each other does not mean they are completely directly opposite. After the crimping portion 130 is bent towards the main body 110, when the terminal is projected to the left or right, more than half of the projected outline of the second recessed portion 131 should coincide with the projected outline of the first recessed portion 111.

[0025] The terminal of this utility model has a first recessed portion 111 and a second recessed portion 131 respectively on its main body 110 and crimping portion 10. When the enameled wire passes through the first recessed portion 111, the crimping portion 130 is crimped and welded towards the main body 110 to accommodate the enameled wire in the first recessed portion 111 and the second recessed portion 131, thereby realizing the conductive connection between the terminal 10 and the enameled wire. This solves the problem that the terminal 10 and the enameled wire are difficult to weld or are prone to falling off after welding, thereby improving the connection stability between the terminal 10 and the enameled wire and facilitating the automated assembly of the terminal and the enameled wire.

[0026] See Figure 1 and Figure 3The bottom surface of the first recessed portion 111 of the terminal 100 of this invention is further provided with several recessed first grooves 112, and the bottom surface of the second recessed portion 131 is further provided with several recessed second grooves 132. This design facilitates the interlocking and fixing of the enameled wire within the first grooves 111 and second grooves 131, further enhancing the connection strength between the terminal 100 and the enameled wire. Furthermore, to improve the airtightness of the terminal 100 and the enameled wire within the first grooves 111 and second grooves 131, and to reduce the possibility of external gas entering the first grooves 111 and second grooves 131 and contacting the enameled wire, causing oxidation and weakening the conductivity of the enameled wire, the second grooves 132 are offset from the first grooves 112 when the crimping portion 130 is pressed against the main body 110 to a substantially parallel position.

[0027] See Figure 2 In this invention, the terminal 100 has an upwardly extending terminal post 140 on the end face opposite to the insertion portion. Further, the terminal post 140 includes a connecting portion 141 formed by bending backward from the crimping portion 130 and upward, and a columnar contact portion 142 extending upward from one end of the connecting portion 141. This design facilitates connection of the terminal 100 to an external power source while reducing the radial space occupied by the device using the terminal 100, thus facilitating connection of the terminal 100 to external components and improving component layout of the device using the terminal 100. Furthermore, to reduce the contact length between the enameled wire and the terminal and prevent the enameled wire from being crushed, the length of the first recess 111 is greater than the length of the second recess 131, and the first recess 111 also has an inclined guide surface 113 near the terminal post 140.

[0028] See Figure 4 This utility model also discloses a coil assembly 10, which includes an iron core 200, a coil frame 300 fixed on the iron core 200, an enameled wire 400 wound on the coil frame 300, and the aforementioned terminal 100. During assembly, the enameled wire 400 passes through the terminal 100 and is at least partially accommodated in the first recess 111 and the second recess 131. Further, to ensure the connection strength between the terminal 100 and the enameled wire 400 while preventing the enameled wire 400 from being crushed during the spot welding connection process with the terminal 100, the depth dimension of the first recess 111 of the terminal 100 is h1, the depth dimension of the second recess 131 is h2, and the wire diameter of the enameled wire 400 is φ, thus satisfying (h1+h2) / φ≥0.6.

[0029] Furthermore, see Figure 2 To ensure sufficient contact area between terminal 100 and enameled wire 400 and to prevent breakage of enameled wire 400 during spot welding, this embodiment designs the first recess 111 and the second recess 131 with equal opening widths, and both opening widths are L, thus satisfying φ2 *π / 4*(h1+h2)≤L≤φ 2 / (h1+h2).

[0030] Furthermore, to reduce the weight of the coil assembly 10 and facilitate its lightweight design, the enameled wire 400 in this embodiment is an aluminum enameled wire.

[0031] See Figure 5 This utility model also discloses an electric water pump, which includes a pump body 20, a rotor assembly 30 rotatably mounted on the pump body 20, a pump cover 40 covering the pump body 20, and the aforementioned coil assembly 10, wherein the coil assembly 10 is fixed to the pump body 20. The electric water pump designed above can reduce the occurrence of open-circuit failures in the coil assembly and improve the operational stability of the electric water pump.

Claims

1. A terminal, characterized in that, include, The plate-shaped main body (110) has a first recessed portion (111) formed by a downward indentation on one side of its front end face; The insertion part (120) is a plate-shaped body that extends downward from the side of the main body part (110) where the first recess (111) is not provided; The crimping portion (130) extends downward and folds up on the side of the main body portion (110) where the first concave portion (111) is provided, and its end face facing the main body portion (110) is provided with a second concave portion (131) formed by a downward indentation, the second concave portion (131) being opposite to the first concave portion (111).

2. The terminal according to claim 1, characterized in that: The bottom surface of the first concave portion (111) is provided with several recessed first grooves (112), and the bottom surface of the second concave portion (131) is provided with several recessed second grooves (132).

3. The terminal according to claim 2, characterized in that: When the crimping part (130) is pressed against the main body part (110) until it is basically parallel, the second groove (132) is misaligned with the first groove (112).

4. The terminal according to claim 1, characterized in that: The main body (110) also has a terminal post (140) extending upward from the end face opposite to the plug-in part (120).

5. The terminal according to claim 4, characterized in that: The terminal block (140) includes a connecting portion (141) that moves backward away from the crimping portion (130) and bends upward, and a columnar electrical contact portion (142) that extends upward from one end of the connecting portion (141).

6. The terminal according to claim 4, characterized in that: The length of the first recess (111) is greater than the length of the second recess (131), and the first recess (111) is also provided with an inclined guide surface (113) on the side near the terminal (140).

7. A coil assembly, comprising an iron core (200), a coil frame (300) fixed on the iron core (200), and enameled wire (400) wound on the coil frame (300), characterized in that: It also includes a terminal (100) as described in any one of claims 1-6, wherein the enameled wire (400) passes through the terminal (100) and is at least partially accommodated in a first recess (111) and a second recess (131), wherein the depth dimension of the first recess (111) is h1, the depth dimension of the second recess (131) is h2, and the wire diameter of the enameled wire (400) is φ, then (h1+h2) / φ≥0.

6.

8. The coil assembly according to claim 7, characterized in that: The enameled wire (400) is an aluminum enameled wire.

9. The coil assembly according to claim 7 or 8, characterized in that: The width dimension of the openings of the first concave portion (111) and the second concave portion (131) is L, thus satisfying φ 2 *π / 4*(h1+h2)≤L≤φ 2 / (h1+h2).

10. An electric water pump, comprising a pump body (20), a rotor assembly (30) rotatably mounted on the pump body (20), and a pump cover (40) covering the pump body (20), characterized in that: It also includes the coil assembly as described in any one of claims 7 to 9, the coil assembly being fixed to the pump body (20).

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