Stator outgoing line structure, stator assembly and motor

Abstract

The utility model discloses a stator leading-out wire structure, a stator assembly and a motor, the stator leading-out wire structure is assembled on the stator assembly, the stator leading-out wire structure comprises a bottom box and a box cover which are mutually matched and connected, the bottom box and the box cover are matched to form an accommodating chamber, a wiring harness assembly is arranged in the accommodating chamber, and the wiring harness assembly comprises a plurality of groups of wiring harness terminals and leading-out wires which are mutually connected; the bottom box is provided with a plurality of wire harness terminal grooves, and the wire harness terminals are connected with enameled wire terminals of the stator assembly through the wire harness terminal grooves. The bottom box is provided with at least one ventilation slot, and the ventilation slot is located at one side, close to the outgoing line, of the wire harness terminal slot and is communicated with the wire harness terminal slot. According to the utility model, the plurality of ventilation slots communicated with the wiring harness terminal slots are arranged at the positions, close to the wiring harness terminals, of the bottom box, so that convective heat exchange is realized, formation of water vapor on the surfaces of the wiring harness terminals due to temperature difference is avoided, the reliability of the three-phase terminals is improved, and the use safety of the whole washing machine is improved.

Description

Technical Field

[0001] This utility model relates to the field of external rotor direct drive motor technology, specifically to a stator lead wire structure, stator assembly and motor. Background Art

[0002] External rotor direct-drive motors are high-efficiency, compact electric motors characterized by their external rotor position and direct load drive, playing a crucial role in numerous industrial applications. The stator lead structure, as a key component, is critical to the stable and reliable operation of the entire motor system.

[0003] Traditional stator lead wire structures use a design that combines a base box and a cover. Typically, the base box is first fixed to the stator coil assembly, then the motor wiring harness terminals are inserted into the corresponding enameled wire terminals, and finally the cover is secured. Taking an external rotor direct-drive motor for a drum washing machine as an example, this design has the following drawbacks in actual operation and maintenance:

[0004] These types of external rotor direct drive motors are typically installed on the outer drum of a drum washing machine. During operation, due to factors such as the activation of the washing water heating function, the increased friction from the rotating inner drum bearings, and the self-heating of the motor stator coils, the surface temperature of the stator can be significantly higher than the ambient temperature. After the washing machine finishes its cycle, a significant temperature difference exists between the stator and its surrounding structure, causing condensation on the stator surface. Furthermore, the relatively enclosed structure inside the washing machine hinders the dissipation of moisture, especially in the complex terminal slots where moisture is even more difficult to escape. Over time, this accumulation can easily lead to corrosion and short circuits between the three-phase terminals, posing a safety hazard. Utility Model Content

[0005] The technical problem this invention aims to solve is how to prevent water vapor condensation on the surface of the motor stator caused by temperature differences.

[0006] In a first aspect, to solve the above-mentioned technical problems, this utility model provides a stator lead wire structure, assembled in a stator assembly, comprising:

[0007] A base box and a cover are connected to each other, forming a receiving chamber. A wire harness assembly is provided in the receiving chamber, and the wire harness assembly includes several sets of interconnected wire harness terminals and leads.

[0008] The bottom box is provided with a plurality of wire harness terminal slots, and the wire harness terminals are connected to the enameled wire terminals of the stator assembly through the wire harness terminal slots; the bottom box is provided with at least one ventilation slot, which is located on the side of the wire harness terminal slot near the lead wire and is in communication with the wire harness terminal slot.

[0009] Furthermore, the lid is provided with at least one ventilation hole, which can form air convection with the ventilation slot.

[0010] Furthermore, the ventilation hole penetrates the surface of the box cover and is positioned directly opposite the ventilation slot.

[0011] Furthermore, the orthographic projection of the ventilation hole on the bottom box covers the ventilation slot and also covers a portion of the wire harness terminal slot.

[0012] Furthermore, the bottom box is provided with multiple ventilation slots, which are arranged parallel to each other along the width direction of the bottom box.

[0013] Furthermore, it also includes a drain outlet, which is disposed on the side wall where the bottom box and the box cover mate, and the drain outlet and the ventilation groove are located on opposite sides of the wire harness terminal groove.

[0014] Furthermore, it also includes a vent, which is located on the side wall where the cover and the bottom box mate, and the vent is connected to the drain outlet.

[0015] Furthermore, the bottom box is also provided with several limiting structures that cooperate with the wire harness assembly, the lead wire is placed in the limiting structure, and the ventilation groove extends from the wire harness terminal groove to the limiting structure.

[0016] In a second aspect, this utility model provides a stator assembly comprising a stator coil assembly, characterized in that the stator coil assembly comprises an insulating frame and the stator lead wire structure.

[0017] A third aspect of this utility model provides an electric motor, including the aforementioned stator assembly.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention achieves convective heat transfer by setting several ventilation slots connected to the wire harness terminal slots near the bottom box, avoiding the formation of water vapor on the surface of the wire harness terminals due to temperature differences, increasing the reliability of the three-phase terminals, and improving the overall safety of the washing machine. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the stator assembly disclosed in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the bottom box disclosed in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the box lid disclosed in an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the wire harness assembly disclosed in an embodiment of the present utility model.

[0024] In the picture:

[0025] 00. Stator coil completed;

[0026] 10. Base box; 11. Ventilation slot; 12. Drain outlet; 13. Wiring harness terminal slot;

[0027] 20. Box lid; 21. Ventilation hole; 22. Ventilation opening;

[0028] 30. Wire harness assembly; 31. Wire harness terminal; 31a. Plug-in part; 31b. Connecting part; 32. Lead wire. Detailed Implementation

[0029] To make the technical solutions and effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0030] The first aspect of this utility model aims to provide a stator lead wire structure with heat convection. By setting several ventilation slots that communicate with the wire harness terminal slots at the position of the bottom box near the wire harness terminal, convective heat exchange is achieved, avoiding the formation of water vapor on the wire harness assembly due to temperature difference. At the same time, small areas of condensation that may occasionally form can be discharged in time, increasing the reliability of the three-phase terminals and improving the overall safety of the washing machine.

[0031] Please see Figure 1 The stator lead wire structure provided in this embodiment is assembled on the stator coil and mainly includes a housing with a receiving chamber and a ventilation mechanism disposed in the housing.

[0032] First, the box body in this embodiment will be described.

[0033] The housing includes a base box 10 and a cover 20 that are connected to each other. The base box 10 and the cover 20 cooperate to form a receiving chamber, in which a wire harness assembly 30 is disposed. The wire harness assembly 30 includes several sets of interconnected wire harness terminals 31 and lead wires 32. The base box 10 is provided with several wire harness terminal slots 13, and the wire harness terminals 31 are connected to the enameled wire terminals of the stator assembly 00 through the wire harness terminal slots 13.

[0034] Please see Figure 4The wire harness terminal 31 includes a plug-in portion 31a that corresponds to the enameled wire terminal of the stator coil and a connecting portion 31b that is circumferentially connected to the outer circumference of the lead wire 32. The connecting portion 31b can be provided to wrap around the outer circumference of the lead wire 32, and a generally annular boss structure is formed on the outer circumference of the connecting portion 31b.

[0035] Those skilled in the art further explain that the bottom box 10 is fixed to the stator coil assembly 00 by screws; the three wire harness terminals 31 of the wire harness assembly 30 are sequentially inserted into the three enameled wire terminals on the stator coil assembly 00; the three lead wires 32 of the wire harness assembly 30 are then locked with cable ties; and finally, the box cover 20 is fixed to the bottom box 10 by screws.

[0036] Next, the ventilation mechanism in this embodiment will be described.

[0037] The bottom box 10 and the cover 20 are equipped with ventilation mechanisms for heat convection at corresponding positions. The ventilation mechanisms are located close to the wire harness terminals 31 because the wire harness terminals 31 generate heat during operation. The ventilation mechanisms can achieve convection heat exchange and also discharge the water vapor accumulated in the complex terminal slot area, so that there is no water vapor condensation on the surface of the wire harness terminals 31.

[0038] In a further embodiment, the ventilation mechanism includes several ventilation slots 11 and drain outlets 12 disposed in the bottom box 10, as well as ventilation holes 21 and ventilation openings 22 disposed in the box cover 20.

[0039] Ventilation slots 11 are located on the side of the wire harness terminal slot 13 near the lead wire 32 and are connected to the wire harness terminal slot 13. Multiple ventilation slots 11 are provided on the bottom wall of the base box 10 and are arranged parallel to each other along the width direction of the base box 10. Preferably, the ventilation slots 11 are located near the connection portion 31b of the wire harness terminal 31. In one example, there are three wire harness terminal slots 13 and three ventilation slots 11, and each ventilation slot 11 is connected to one wire harness terminal slot 13.

[0040] Ventilation hole 21 penetrates the surface of cover 20 and is positioned directly opposite ventilation slot 11. Preferably, the orthogonal projection of ventilation hole 21 on bottom box 10 covers ventilation slot 11 and a portion of wire harness terminal slot 13. Preferably, ventilation hole 21 is a strip shape with a length ranging from 2.0 to 4.2 cm. This design facilitates better air convection, improves heat dissipation, and prevents moisture from forming near wire harness terminal 31 due to temperature differences.

[0041] Drain 12 is located on the side wall where the bottom box 10 and the cover 20 mate. Drain 12 and ventilation slot 11 are located on opposite sides of the wire harness terminal slot 13, and are used to drain condensate that accumulates near the plug-in portion 31a under gravity. Preferably, ventilation slot 11 and drain 12 are located on the same horizontal line, which helps to form a good air circulation path.

[0042] Ventilation opening 22 is located on the side wall where the cover 20 and the bottom box 10 mate, and the ventilation opening 22 is connected to the drain outlet 12. The size of the ventilation opening 22 is not specifically limited, as long as it is connected to the drain outlet 12.

[0043] Those skilled in the art further explain that the bottom box 10 is also provided with several limiting structures 14 that cooperate with the wire harness assembly 30, the lead wire 32 is placed in the limiting structure 14, and the ventilation groove 11 extends from the wire harness terminal groove 13 to the limiting structure 14.

[0044] A second aspect of this utility model aims to provide a stator assembly including a stator coil assembly 00, the stator coil assembly 00 including an insulating frame and the stator lead wire structure with heat convection disclosed above.

[0045] A third aspect of this invention aims to provide an electric motor comprising the stator lead structure with heat convection disclosed above.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stator lead wire structure, assembled in a stator assembly (00), characterized in that, include: A base box (10) and a cover (20) are connected to each other. The base box (10) and the cover (20) cooperate to form a receiving chamber. A wire harness assembly (30) is provided in the receiving chamber. The wire harness assembly (30) includes several sets of interconnected wire harness terminals (31) and lead wires (32). The bottom box (10) is provided with a plurality of wire harness terminal slots (13), and the wire harness terminal (31) is connected to the enameled wire terminal of the stator assembly (00) through the wire harness terminal slots (13); the bottom box (10) is provided with at least one ventilation slot (11), the ventilation slot (11) is located on the side of the wire harness terminal slot (13) near the lead wire (32), and communicates with the wire harness terminal slot (13).

2. The stator lead wire structure according to claim 1, characterized in that, The cover (20) is provided with at least one ventilation hole (21), and the ventilation hole (21) and the ventilation slot (11) can form air convection.

3. The stator lead wire structure according to claim 2, characterized in that, The ventilation hole (21) penetrates the surface of the cover (20) and is positioned directly opposite the ventilation slot (11).

4. The stator lead wire structure according to claim 3, characterized in that, The orthographic projection of the ventilation hole (21) on the bottom box (10) covers the ventilation slot (11) and a portion of the wire harness terminal slot (13).

5. The stator lead wire structure according to claim 1, characterized in that, The bottom box (10) is provided with a plurality of ventilation slots (11), and the ventilation slots (11) are arranged in parallel at intervals along the width direction of the bottom box (10).

6. The stator lead wire structure according to claim 1, characterized in that, It also includes a drain outlet (12), which is located on the side wall of the bottom box (10) that mates with the box cover (20). The drain outlet (12) and the ventilation groove (11) are located on opposite sides of the wire harness terminal groove (13).

7. The stator lead wire structure according to claim 6, characterized in that, It also includes a vent (22), which is located on the side wall where the cover (20) and the bottom box (10) fit together, and the vent (22) is connected to the drain (12).

8. According to claim 1, the stator lead wire structure is further provided with a plurality of limiting structures (14) that cooperate with the wire harness assembly (30) on the bottom box (10), the lead wire (32) is placed in the limiting structure (14), and the ventilation groove (11) extends from the wire harness terminal groove (13) to the limiting structure (14).

9. A stator assembly comprising a stator coil assembly (00), characterized in that, The stator coil assembly (00) includes an insulating frame and a stator lead wire structure as described in any one of claims 1-8.

10. An electric motor, characterized in that, Includes the stator assembly as described in claim 9.

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