Coil assembly easy and convenient to assemble

Abstract

The utility model relates to the technical field of water pumps, and discloses a coil assembly easy and convenient to assemble, which comprises a coil framework, a winding, a first insertion piece, a second insertion piece, a third insertion piece and a thermal protector, the first insertion piece, the second insertion piece and the third insertion piece are fixed on one side of the coil framework at intervals, and a first end pin is arranged at the bottom of the first insertion piece. The second inserting piece is provided with a first folding piece, the third inserting piece is provided with a second folding piece, the bottom of the third inserting piece is provided with a second end pin, the top of the first folding piece and the top of the second folding piece are respectively provided with a clamping groove, the winding is arranged on the coil framework, one end of the winding is in conductive connection with the first end pin, and the other end of the winding is in conductive connection with the second end pin. The heat protector is fixed on one side of the winding and provided with two pins, one pin is connected with the clamping groove of the second folding piece in a clamped mode, and the other pin is connected with the clamping groove of the first folding piece in a clamped mode. According to the utility model, connection between the pins and the insertion sheets is realized through clamping, and assembling is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to a coil assembly that is easy to assemble. Background Technology

[0002] Currently, coil assemblies, widely used in the stator of motor drives in drain pumps of electrical appliances such as washing machines, dishwashers, vegetable washers, bottle washers, foot baths, and massage bathtubs, generate a rotating magnetic field through energization, driving a permanent magnet rotor to rotate an impeller within the pump chamber. This causes water entering through the inlet to generate centrifugal force due to the high-speed rotation of the impeller, ultimately discharging pressurized water through the outlet hole on the pump cover and its connected drain pipe. This coil assembly is a critical component, therefore a thermal protector must be installed in its circuit for overheating trip protection. However, in the current assembly process of coil assemblies, the pins and contacts of the thermal protector are connected by solder, which is inconvenient and prone to problems such as incomplete soldering and cold solder joints. Excessive soldering time can also melt the coil frame's insertion holes, causing the contacts to shift after soldering, making it difficult to install in the mold during injection molding and potentially damaging the contacts. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a coil assembly that is easy to assemble by connecting the pins and inserts of a thermal protector through snap-fit.

[0004] To solve the above-mentioned technical problems, this utility model provides a coil assembly that is easy to assemble, including a coil frame, a winding, a first insert, a second insert, a third insert, and a thermal protector. The first insert, the second insert, and the third insert are fixed to one side of the coil frame at intervals. The bottom of the first insert has a first end foot, the second insert has a first fold, and the third insert has a second fold. The bottom of the third insert has a second end foot. The top of the first fold and the top of the second fold are respectively provided with slots. The winding is disposed on the coil frame. One end of the winding is electrically connected to the first end foot, and the other end of the winding is electrically connected to the second end foot. The thermal protector is fixed to one side of the winding. The thermal protector has two pins, one of which engages with the slot of the second fold, and the other pin engages with the slot of the first fold.

[0005] As a preferred embodiment of this utility model, the bottom of the slot and the side away from the coil frame are both open, and the two sides of the pin are respectively provided with a locking slot that cooperates with the two sides of the slot.

[0006] As a preferred embodiment of this utility model, the card slot is provided with a funnel-shaped guide opening on the side away from the coil frame.

[0007] As a preferred embodiment of the present invention, the side of the coil frame is provided with a first slot, a second slot and a third slot, the first insert is interference-fitted with the first slot, the second insert is interference-fitted with the second slot and the third insert is interference-fitted with the third slot.

[0008] As a preferred embodiment of the present invention, the first end foot is provided with a first groove on each of its opposite sides, and a first connecting part is formed between the two first grooves. The second end foot is provided with a second groove on each of its two pairs of sides, and a second connecting part is formed between the two second grooves. One end of the winding is wound on the first connecting part, and the other end of the winding is wound on the second connecting part.

[0009] As a preferred embodiment of this utility model, the winding consists of two coils connected in series, and the thermal protector is fixed to the side of one of the coils.

[0010] As a preferred embodiment of this utility model, the coil assembly further includes a plastic encapsulated shell, which encapsulates the coil frame, winding, thermal protector, first insert, first end pin, second insert, first folded piece, third insert, second folded piece, and second end pin. The side of the first insert away from the coil frame and the side of the second insert away from the coil frame extend out of the plastic encapsulated shell.

[0011] This utility model provides a coil assembly that is easy to assemble. Compared with the prior art, its advantages are as follows: This utility model can achieve a fixed connection between the pin and the first or second flap by snapping the pin with the slot, without the need for soldering, thus simplifying assembly; one end of the winding is electrically connected to the first terminal, and the other end of the winding is electrically connected to the second terminal; one pin of the thermal protector is electrically connected to the second flap, and the other pin of the thermal protector is electrically connected to the first flap, thereby realizing the series connection between the winding and the thermal protector, ensuring that the thermal protector can protect the winding. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the present invention;

[0013] Figure 2 This is the front view of this utility model;

[0014] Figure 3 This is a structural diagram of the coil frame of this utility model;

[0015] Figure 4 This is a structural diagram of the first insert of this utility model;

[0016] Figure 5 This is a structural diagram of the second insert of this utility model;

[0017] Figure 6 This is a structural diagram of the third insert of this utility model;

[0018] Figure 7 This is a structural diagram of the thermal protector of this utility model;

[0019] Figure 8 This is the structure of the plastic-encapsulated shell of this utility model;

[0020] In the diagram, 1. Coil frame; 11. First slot; 12. Second slot; 13. Third slot; 2. Winding; 3. First insert; 31. First end pin; 311. First groove; 312. First connecting part; 4. Second insert; 41. First fold; 5. Third insert; 51. Second end pin; 511. Second groove; 512. Second connecting part; 52. Second fold; 6. Thermal protector; 61. Pin; 611. Bayonet; 7. Slot; 71. Guide opening; 8. Plastic encapsulated shell. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] like Figure 1-8As shown, a preferred embodiment of the present invention provides a coil assembly that is easy to assemble, including a coil frame 1, a winding 2, a first insert 3, a second insert 4, a third insert 5, and a thermal protector 6. The first insert 3, the second insert 4, and the third insert 5 are fixed to one side of the coil frame 1 at intervals. In this embodiment, the first insert 3, the second insert 4, and the third insert 5 are arranged side by side. The first insert 3 and the second insert 4 are respectively used for connection to a power source. The bottom of the first insert 3 is provided with a first end 31. Generally, the first end 31 is integrally formed with the first insert 3. The second insert 4 is provided with a first fold 41. Generally, the second insert 4 and the first fold 41 are integrally formed. The third insert 5 is provided with a second fold 52. The bottom of the third insert 5 is provided with a second end 51. Generally, the third insert 5, the second fold 52, and the second end 5 are integrally formed with a power source. The foot 51 is integrally formed. In this embodiment, the first fold 41 is located on the side of the second insert 4 near the third insert 5, and the second fold 52 is located on the side of the third insert 5 near the second insert 4. There is a gap between the first fold 41 and the second fold 52. The top of the first fold 41 and the top of the second fold 52 are respectively provided with slots 7. The winding 2 is located on the coil frame 1. One end of the winding 2 is electrically connected to the first end foot 31, and the other end of the winding 2 is electrically connected to the second end foot 51. The thermal protector 6 is fixed on one side of the winding 2. The thermal protector 6 is provided with two pins 61. One pin 61 is engaged with the slot 7 of the second fold 52, and the other pin 61 is engaged with the slot 7 of the first fold 41, so that one pin 61 is electrically connected to the second fold 52, and the other pin 61 is electrically connected to the first fold 41.

[0024] The assembly process of this embodiment is as follows: First, fix the first insert 3, the second insert 4 and the third insert 5 to the side of the coil frame 1 respectively. Then, wind the winding 2 on the coil frame 1, and connect one end of the winding 2 to the first end 31 and the other end of the winding 2 to the second end 51. Then, engage one pin 61 of the thermal protector 6 with the slot 7 on the first flap 41, engage the other pin 61 of the thermal protector 6 with the slot 7 on the second flap 52, and fix the thermal protector 6 to the side of the winding 2, such as by adhesive.

[0025] In this embodiment, the pin 61 is fixedly connected to the first flap 41 or the second flap 52 by snapping the pin 61 into the slot 7. This simplifies assembly, eliminates the need for soldering, and reduces costs. One end of the winding 2 is electrically connected to the first pin 31, meaning the first insert 3 is electrically connected to one end of the winding 2. The other end of the winding 2 is electrically connected to the second pin 51, meaning the other end of the winding 2 is electrically connected to the third insert 5. One pin 61 of the thermal protector 6 is electrically connected to the second flap 52, meaning the third insert 5 is electrically connected to one pin 61 of the thermal protector 6. The other pin 61 of the thermal protector 6 is electrically connected to the first flap 41, meaning the other pin 61 of the thermal protector 6 is electrically connected to the second insert 4. This achieves series connection between the winding 2 and the thermal protector 6, ensuring that the thermal protector 6 can protect the winding 2.

[0026] For example, the bottom of the slot 7 and the side away from the coil frame 1 are both open, and the pin 61 is provided with a latch 611 on both sides that mates with the two sides of the slot 7, which can prevent the pin 61 from moving up or down and ensure the stability of the connection.

[0027] For example, the slot 7 has a flared guide opening 71 on the side away from the coil frame 1, which can serve as a guide to facilitate the insertion of the pin 61 into the slot 7.

[0028] For example, the side of the coil frame 1 is provided with a first slot 11, a second slot 12 and a third slot 13. The first insert 3 is interference-fitted with the first slot 11, the second insert 4 is interference-fitted with the second slot 12 and the third insert 5 is interference-fitted with the third slot 13. By inserting the first insert 3 into the first slot 11, the second insert 4 into the second slot 12 and the third insert 5 into the third slot 13, the first insert 3, the second insert 4 and the third insert 5 can be fixed on the coil frame 1, which is simple to assemble.

[0029] For example, the first end foot 31 has a first groove 311 on each of its opposite sides, and a first connecting portion 312 is formed between the two first grooves 311. The second end foot 51 has a second groove 511 on each of its two pairs of sides, and a second connecting portion 512 is formed between the two second grooves 511. One end of the winding 2 is wound around the first connecting portion 312. The first groove 311 helps to position and wind one end of the winding 2 around the first connecting portion 312, and also prevents one end of the winding 2 from separating from the first connecting portion 312 (from the bottom end of the first end foot 31). The other end of the winding 2 is wound around the second connecting portion 512. The second groove 511 helps to position and connect the other end of the winding 2 to the second connecting portion 512, and also prevents the other end of the winding 2 from separating from the second connecting portion 512.

[0030] For example, winding 2 consists of two coils connected in series, i.e., one end of one coil is connected to the first terminal 31, the other end of the coil is connected to one end of another coil, and the other end of the other coil is connected to the second terminal 51. Thermal protector 6 is fixed to the side of one of the coils.

[0031] For example, the coil assembly also includes a plastic encapsulation shell 8, which encapsulates the coil frame 1, winding 2, thermal protector 6, first insert 3, first end 31, second insert 4, first flap 41, third insert 5, second flap 52, and second end 51, thereby providing protection. The side of the first insert 3 away from the coil frame 1 and the side of the second insert 4 away from the coil frame 1 extend out of the plastic encapsulation shell 8, that is, the plastic encapsulation shell 8 partially encapsulates the first insert 3 and the second insert 4. The connection points of the first insert 3 and the second insert 4 with the coil frame 1 are encapsulated by the plastic encapsulation shell 8 to ensure the stability of their connection. The side of the first insert 3 away from the coil frame 1 and the side of the second insert 4 away from the coil frame 1 extending out of the plastic encapsulation shell 8 facilitates their connection to the power supply.

[0032] 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 coil assembly that is easy to assemble, characterized in that: The device includes a coil frame, a winding, a first insert, a second insert, a third insert, and a thermal protector. The first, second, and third inserts are fixed to one side of the coil frame at intervals. The first insert has a first end foot at its bottom, the second insert has a first fold, and the third insert has a second fold and a second end foot at its bottom. The tops of the first and second folds are respectively provided with slots. The winding is disposed on the coil frame, with one end of the winding electrically connected to the first end foot and the other end of the winding electrically connected to the second end foot. The thermal protector is fixed to one side of the winding and has two pins, one of which engages with the slot of the second fold and the other pin engages with the slot of the first fold.

2. The easily assembled coil assembly according to claim 1, characterized in that: The bottom of the slot and the side away from the coil frame are both open, and the pins are respectively provided with slots that cooperate with the two sides of the slot.

3. The easily assembled coil assembly according to claim 2, characterized in that: The slot has a flared guide opening on the side away from the coil frame.

4. The easily assembled coil assembly according to claim 1, characterized in that: The coil frame is provided with a first slot, a second slot and a third slot on its side. The first insert is interference-fitted with the first slot, the second insert is interference-fitted with the second slot and the third insert is interference-fitted with the third slot.

5. The easily assembled coil assembly according to claim 1, characterized in that: The first end foot has a first groove on each of its opposite sides, and a first connecting part is formed between the two first grooves. The second end foot has a second groove on each of its two pairs of sides, and a second connecting part is formed between the two second grooves. One end of the winding is wound on the first connecting part, and the other end of the winding is wound on the second connecting part.

6. The easily assembled coil assembly according to claim 1, characterized in that: The winding consists of two coils connected in series, and the thermal protector is fixed to the side of one of the coils.

7. The easily assembled coil assembly according to claim 1, characterized in that: It also includes a plastic encapsulation shell, which encapsulates the coil frame, winding, thermal protector, first insert, first lead, second insert, first fold, third insert, second fold, and second lead. The side of the first insert away from the coil frame and the side of the second insert away from the coil frame extend out of the plastic encapsulation shell.

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