Winding holder for a brushless motor

Abstract

The utility model discloses a winding frame of brushless motor, including a plurality of circumferential uniform arrangement stator tooth, be equipped with the main winding groove that line core line surrounds on stator tooth, still be equipped with first line containing groove, second line containing groove and third line containing groove to one end of stator tooth, first line containing groove contains the first phase overbridge line of three phase winding of brushless motor, second line containing groove contains the second phase overbridge line of three phase winding of brushless motor, third line containing groove contains the third phase overbridge line of three phase winding of brushless motor. The utility model discloses a winding frame of brushless motor can improve brushless motor interphase insulation, improve operating stability, prolong the life.

Description

Technical Field

[0001] This utility model relates to a brushless motor, and more particularly to a winding frame for a brushless motor. Background Technology

[0002] like Figure 1 As shown, in a conventional brushless motor with a stator tooth structure of 200, the A, B, and C phase bridging wires are not separated during winding, causing them to overlap. If the enameled wire is damaged during winding, such as by abrasions or pinholes, it can easily lead to problems like inter-turn withstand voltage failure or phase-to-phase short circuits, shortening the stability and lifespan of the brushless motor. Utility Model Content

[0003] The purpose of this invention is to provide a winding frame for a brushless motor that can improve the interphase insulation, enhance operational stability, and extend the service life of the brushless motor.

[0004] To achieve the above objectives, this utility model provides a winding frame for a brushless motor, comprising a plurality of stator teeth evenly arranged circumferentially. Each stator tooth has a main winding groove for the winding core wire to be wound around. One end of each stator tooth is further provided with a first winding groove, a second winding groove, and a third winding groove. The first winding groove accommodates the first phase bridging wire of the three-phase winding of the brushless motor; the second winding groove accommodates the second phase bridging wire of the three-phase winding of the brushless motor; and the third winding groove accommodates the third phase bridging wire of the three-phase winding of the brushless motor. Compared with the prior art, this utility model sets three wire slots on the stator teeth to accommodate the bridge wires of the three-phase windings of the brushless motor, so that the three bridge wires will not overlap. This avoids the problems caused by the paint wear or pinholes of the bridge wires, such as failure of inter-turn withstand voltage or phase-to-phase short circuit. In this way, it effectively improves the phase-to-phase insulation of the brushless motor, improves the operational stability, and extends the service life.

[0005] Preferably, the first phase bridging line, the second phase bridging line, and the third phase bridging line are arranged at intervals between each other.

[0006] Preferably, the first, second, and third cable trays are arranged sequentially from the outside in. This allows the three cable trays to be separated from each other, thus ensuring that the three bridge cables are spaced apart and do not interfere with each other.

[0007] Preferably, the first, second, and third cable trays are arranged sequentially from low to high. This allows the three cable trays to be separated from each other, thus ensuring that the three bridge cables are spaced apart and do not interfere with each other.

[0008] Specifically, one end surface of the stator tooth is provided with a first step surface, a second step surface and a third step surface from low to high. The first step surface is provided with a first protrusion, and a first groove is formed between the first protrusion and the sidewall of the second step. The second step surface is provided with a second protrusion, and a second groove is formed between the second protrusion and the sidewall of the third step. The third step surface is provided with a third protrusion and a fourth protrusion, and a third groove is formed between the third protrusion and the fourth protrusion. Attached Figure Description

[0009] Figure 1 This is a diagram showing the state where the three bridge lines on the existing stator teeth are superimposed.

[0010] Figure 2 This is a diagram showing the state of the three bridge wires of the winding frame of this utility model being arranged separately on the stator teeth. Detailed Implementation

[0011] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0012] Please see Figure 2 The winding frame of the brushless motor of this utility model includes a plurality of circumferentially evenly arranged stator teeth 1. Each stator tooth 1 is provided with a main winding groove 11 for the winding core wire to be wound around. One end of each stator tooth 1 is also provided with a first wire-receiving groove 12, a second wire-receiving groove 13, and a third wire-receiving groove 14. The first wire-receiving groove 12 accommodates the first phase bridging wire 2 of the three-phase winding of the brushless motor; the second wire-receiving groove 13 accommodates the second phase bridging wire 3 of the three-phase winding of the brushless motor; and the third wire-receiving groove 14 accommodates the third phase bridging wire 4 of the three-phase winding of the brushless motor. The first phase bridging wire 2, the second phase bridging wire 3, and the third phase bridging wire 4 are arranged at intervals between each other.

[0013] The first cable tray 12, the second cable tray 13, and the third cable tray 14 are arranged sequentially from the outside to the inside. This allows the three cable trays to be separated from each other, thus ensuring that the three bridge cables are set apart and do not interfere with each other.

[0014] The first wire receiving groove 12, the second wire receiving groove 13, and the third wire receiving groove 14 are arranged sequentially from low to high. This allows the three wire receiving grooves to be separated from each other, thus ensuring that the three bridge wires are set apart and do not interfere with each other. Specifically, one end surface of the stator tooth 1 is provided with a first step surface 15, a second step surface 16, and a third step surface 17 from low to high. The first step surface 15 has a first protrusion 151 extending upward, and the first protrusion 151 and the side wall of the second step form a first wire receiving groove 12; the second step surface 16 has a second protrusion 161 extending upward, and the second protrusion 161 and the side wall of the third step form a second wire receiving groove 13; the third step surface 17 has a third protrusion 171 and a fourth protrusion 172 extending upward, and the third protrusion 171 and the fourth protrusion 172 form a third wire receiving groove 14.

[0015] Compared with the prior art, this utility model sets three wire slots on the stator tooth 1 to accommodate the bridge wires of the three-phase winding of the brushless motor, so that the three bridge wires will not be mixed together. This avoids the adverse phenomena such as failure of inter-turn withstand voltage or phase-to-phase short circuit caused by paint wear or pinhole damage to the bridge wires. In this way, it effectively improves the phase-to-phase insulation of the brushless motor, improves the operational stability, and extends the service life.

[0016] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A winding frame for a brushless motor, characterized in that: The device includes several stator teeth evenly arranged circumferentially. Each stator tooth has a main winding groove for the core wire to be wound around. One end of each stator tooth is also provided with a first wire receiving groove, a second wire receiving groove, and a third wire receiving groove. The first wire receiving groove accommodates the first phase bridging wire of the three-phase winding of the brushless motor; the second wire receiving groove accommodates the second phase bridging wire of the three-phase winding of the brushless motor; and the third wire receiving groove accommodates the third phase bridging wire of the three-phase winding of the brushless motor.

2. The winding frame of the brushless motor according to claim 1, characterized in that: The first phase bridge line, the second phase bridge line, and the third phase bridge line are arranged at intervals between each other.

3. The winding frame of the brushless motor according to claim 1, characterized in that: The first, second, and third wire slots are arranged sequentially from the outside to the inside.

4. The winding frame of the brushless motor according to claim 1, characterized in that: The first, second, and third wire slots are arranged sequentially from low to high.

5. The winding frame of the brushless motor according to claim 4, characterized in that: One end surface of the stator tooth is provided with a first step surface, a second step surface and a third step surface from low to high. A first protrusion is provided on the first step surface, and a first groove is formed between the first protrusion and the side wall of the second step. A second protrusion is provided on the second step surface, and a second groove is formed between the second protrusion and the side wall of the third step. A third protrusion and a fourth protrusion are provided on the third step surface, and a third groove is formed between the third protrusion and the fourth protrusion.

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