Stator assembly and motor using it

Abstract

This utility model discloses a stator assembly and a motor using the same, relating to the technical field of motors and their components. It includes a stator support, a stator core, and a stator winding. The stator support is sleeved on the stator core to shield at least a portion of the stator core. The stator winding is wound around the stator core. The stator support includes at least an insulating cover plate. The insulating cover plate is fixedly disposed at the stator support for shielding at least a portion of the stator core and / or the stator winding. This utility model primarily addresses the problem of providing a reasonable and reliable shielding structure for the stator assembly. It reduces the likelihood of mechanical friction and collision between the stator core and / or the stator winding, thereby decreasing the possibility of mechanical damage. Furthermore, it isolates the stator core and / or the stator winding from liquid and moisture erosion to a certain extent, reducing the possibility of corrosion. It also prevents accidental contact by personnel.

Description

Technical Field

[0001] This utility model relates to the technical field of motors and their components, specifically a stator assembly and a motor using the same. Background Technology

[0002] An electric motor is an electromechanical device that converts electrical energy into mechanical energy. It comes in a wide variety of types and has a diverse range of applications, including industrial equipment, household appliances, and transportation vehicles. Among these, the brushless motor is an important type of motor.

[0003] The stator assembly is one of the core components of an electric motor. When a current of a specific waveform is passed through the stator assembly, a rotating magnetic field is generated, which magnetically drives the rotor assembly of the motor to rotate.

[0004] In the prior art, stator assemblies typically include a stator core and a stator winding formed by winding enameled wire on the stator core with a predetermined number of turns. In addition, some stator assemblies also have an insulating support (or insulating shell) at their stator core.

[0005] The stator assembly with the above-mentioned structure has an exposed stator core and stator windings. Firstly, this makes the stator core and / or stator windings susceptible to mechanical friction and collision, which may cause mechanical damage. Secondly, it makes the stator core and / or stator windings susceptible to corrosion by liquids and moisture, which may cause corrosion. Thirdly, it is prone to accidental contact by personnel, which may lead to injury or electric leakage accidents.

[0006] In conclusion, how to provide a reasonable and reliable shielding structure for stator assemblies has become one of the urgent problems to be solved. Utility Model Content

[0007] The purpose of this invention is to provide a stator assembly and a motor using the same, which can provide a reasonable and reliable shielding structure for the stator assembly.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a stator assembly, including a stator bracket, a stator core, and a stator winding; the stator bracket is sleeved on the stator core to shield at least a portion of the stator core; the stator winding is wound around the stator core; the stator bracket includes at least an insulating cover plate; the insulating cover plate is fixedly disposed on the stator bracket for shielding at least a portion of the stator core and / or the stator winding.

[0009] In the above technical solution, the stator core includes an annular yoke, a plurality of teeth formed in the inner ring of the yoke, and a boot formed at the free end of the teeth; the stator winding includes a winding body and an input / output structure; the winding body of the stator winding is wound around the teeth of the stator core, and the input / output structure of the stator winding is led out to the stator support.

[0010] In the above technical solution, the stator support includes an upper stator support and a lower stator support; the upper stator support includes an annular upper yoke cover plate, a plurality of upper tooth profile grooves formed in the inner ring of the upper yoke cover plate, and an upper boot profile groove formed at the free end of the upper tooth profile grooves; the upper yoke cover plate of the upper stator support abuts against the yoke of the stator core, the upper tooth profile groove of the upper stator support is sleeved on the teeth of the stator core, and the upper boot profile groove of the upper stator support... The slot is fitted onto the shoe portion of the stator core; the lower stator support includes an annular lower yoke cover plate, a plurality of lower tooth profile grooves formed in the inner ring of the lower yoke cover plate, and a lower shoe profile groove formed at the free end of the lower tooth profile grooves; the lower yoke cover plate of the lower stator support abuts against the yoke portion of the stator core, the lower tooth profile groove of the lower stator support is fitted onto the tooth portion of the stator core, and the lower shoe profile groove of the lower stator support is fitted onto the shoe portion of the stator core.

[0011] In the above technical solution, the insulating cover plate covers the end face of the lower stator support.

[0012] In the above technical solution, the insulating cover plate is fixed to the end face of the lower stator bracket by at least one of the following methods: snap fastening, screw locking, integral injection molding, and adhesive bonding.

[0013] In the above technical solution, the insulating cover is configured as a ring structure or a plate structure.

[0014] In the above technical solution, the stator support is provided with a wire-passing structure; the wire-passing structure is provided with a plurality of mutually isolated wire-passing slots; the stator winding's inlet and outlet wire structures are embedded in the wire-passing slots of the stator support.

[0015] In the above technical solution, the wire-passing structure is equipped with a vertically arranged wire-passing plate, and the wire-passing plate is equipped with a horizontally / inclined isolation rib; there is a gap between each isolation rib, which is the wire-passing groove; there is also a gap between the isolation rib and the end face of the stator support, which is also the wire-passing groove; the wire-passing plate of the wire-passing structure is provided with a plurality of wire-passing notches; each wire-passing notch is connected to at least one of the wire-passing grooves; the stator winding's inlet and outlet wire structures pass through the wire-passing notches of the wire-passing structure.

[0016] In the above technical solution, the outer ring surface of the yoke portion of the stator core is exposed to the upper stator support and the lower stator support; the inner ring surface of the shoe portion of the stator core is exposed to the upper stator support and the lower stator support.

[0017] An electric motor comprising the stator assembly described above.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The stator assembly and the motor using it of this utility model include at least an insulating cover plate for shielding at least a portion of the stator core and / or stator windings, providing a reasonable and reliable shielding structure for the stator assembly. By shielding the stator core and / or stator windings with the insulating cover plate, on the one hand, the stator core and / or stator windings are less prone to mechanical friction and collision, thereby reducing the possibility of mechanical damage to the stator core and / or stator windings. On the other hand, it isolates the stator core and / or stator windings from liquid and moisture erosion to a certain extent, thereby reducing the possibility of corrosion of the stator core and / or stator windings. It can also prevent accidental contact by personnel, thereby preventing injury or leakage accidents caused by the stator core and / or stator windings. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention.

[0020] Figure 2 This is an exploded view of the present invention.

[0021] Figure 3 This is an assembly structure view of the lower stator support and insulating cover plate in this utility model.

[0022] Figure 4 This is a perspective view of the upper stator support in this utility model.

[0023] Figure 5 This is a schematic diagram of the wire-passing structure in this utility model.

[0024] The attached figures are labeled as follows: 1. Stator support; 11. Upper stator support; 11a. Upper yoke cover plate; 11b. Upper tooth profile groove; 11c. Upper shoe profile groove; 12. Lower stator support; 12a. Lower yoke cover plate; 12b. Lower tooth profile groove; 12c. Lower shoe profile groove; 13. Wire guide structure; 13a. Wire guide groove; 13b. Wire guide upright plate; 13c. Isolation rib plate; 13d. Wire guide notch; 14. Insulating cover plate; 2. Stator core; 21. Yoke; 22. Tooth; 23. Shoe; 3. Stator winding; 31. Winding body; 32. Inlet and outlet wire structure. Detailed Implementation

[0025] 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.

[0026] This embodiment also provides a stator assembly that, when a current of a specific waveform is applied to it, can generate a rotating magnetic field, thereby magnetically coupling and driving the rotor assembly of the motor to rotate.

[0027] Please see Figures 1-5 The stator assembly in this embodiment includes a stator support 1, a stator core 2, and a stator winding 3.

[0028] The stator support 1 is a support-shaped component / assembly made of engineering plastic, while the stator core 2 is a solid metal component made of several stacked silicon steel sheets.

[0029] The stator support 1 is sleeved on the stator core 2 to shield at least a portion of the stator core 2, thereby providing the stator core 2 with a mechanical support structure and an electrical insulation structure.

[0030] Stator winding 3 is wound at stator core 2.

[0031] In order to provide a shielding structure for the stator assembly of this embodiment, the stator support 1 includes at least an insulating cover plate 14, wherein the insulating cover plate 14 is a plate-shaped component made of engineering plastic.

[0032] An insulating cover plate 14 is fixedly disposed at the stator support 1 to shield at least a portion of the stator core 2 and / or the stator winding 3.

[0033] Specifically, the stator core 2 includes an annular yoke 21, a plurality of teeth 22 formed in the inner ring of the yoke 21, and a boot 23 formed at the free end of the teeth 22; in fact, the yoke 21, the teeth 22 and the boot 23 are integrally formed structures.

[0034] The stator winding 3 includes a winding body 31 and a lead-in / lead-out structure 32. The winding body 31 is a coil obtained by winding enameled wire with a predetermined number of turns, and the lead-in / lead-out structure 32 (i.e., lead-in structure and / or lead-out structure) is the end conductor segment of the winding body 31.

[0035] The winding body 31 of the stator winding 3 is wound on the tooth 22 of the stator core 2, and the input and output wire structure 32 of the stator winding 3 is led out to the stator support 1.

[0036] Please refer to the following in particular Figures 1-3Specifically, the stator support 1 includes an upper stator support 11 and a lower stator support 12, wherein both the upper stator support 11 and the lower stator support 12 are support-shaped components made of engineering plastic. The upper stator support 11 includes an annular upper yoke cover plate 11a, a plurality of upper tooth contour grooves 11b formed in the inner ring of the upper yoke cover plate 11a, and an upper boot contour groove 11c formed at the free end of the upper tooth contour grooves 11b. In fact, the upper yoke cover plate 11a, the upper tooth contour grooves 11b, and the upper boot contour groove 11c are integrally formed structures. The upper yoke cover plate 11a of the upper stator support 11 abuts against the yoke 21 of the stator core 2, the upper tooth contour grooves 11b of the upper stator support 11 are sleeved on the teeth 22 of the stator core 2, and the upper boot contour grooves 11c of the upper stator support 11 are sleeved on the teeth 22 of the stator core 2. The lower stator support 12 includes an annular lower yoke cover plate 12a, a plurality of lower tooth contour grooves 12b formed in the inner ring of the lower yoke cover plate 12a, and a lower boot contour groove 12c formed at the free end of the lower tooth contour grooves 12b. In fact, the lower yoke cover plate 12a, the lower tooth contour grooves 12b and the lower boot contour groove 12c are integrally formed structures. The lower yoke cover plate 12a of the lower stator support 12 abuts against the yoke 21 of the stator core 2, the lower tooth contour grooves 12b of the lower stator support 12 are sleeved on the teeth 22 of the stator core 2, and the lower boot contour grooves 12c of the lower stator support 12 are sleeved on the boot part 23 of the stator core 2. It can be understood that the upper stator support 11 and the lower stator support 12 can be fixedly connected to the stator core 2 by means of adhesive or buckle.

[0037] Specifically, the insulating cover 14 covers the end face of the lower stator support 12 to shield at least a portion of the stator core 2 and / or stator winding 3 from the end face position of the lower stator support 12.

[0038] More specifically, the insulating cover 14 is fixed to the end face of the lower stator support 12 by at least one of the following methods: snap-fit, screw fastening, integral injection molding, and adhesive bonding. In this embodiment, the insulating cover 14 is fixed to the end face of the lower stator support 12 by snap-fit, that is, the insulating cover 14 and the lower stator support 12 are respectively formed with snap-fit ​​structures (not shown in the figure), and the snap-fit ​​structure of the insulating cover 14 and the snap-fit ​​structure of the lower stator support 12 are interlocked, thereby realizing the mutual fixation of the insulating cover 14 and the lower stator support 12.

[0039] More specifically, the insulating cover 14 is configured as a ring structure or a plate structure. In this embodiment, the insulating cover 14 is configured as a ring structure.

[0040] In this embodiment, the annular insulating cover 14 can completely shield the stator core 2 and stator winding 3 from the end face of the lower stator support 12.

[0041] Please refer to the following in particular Figure 4 and Figure 5 Furthermore, the stator support 1 is provided with a wire-passing structure 13, which is a structural feature integrally injection molded on the stator support 1; the wire-passing structure 13 is provided with a plurality of mutually isolated wire-passing grooves 13a, which allow wires to be embedded therein; the stator winding 3’s inlet and outlet wire structure 32 is embedded in the wire-passing grooves 13a of the stator support 1.

[0042] It should be noted that, in this embodiment, the wire-passing structure 13 is formed on the end face of the upper yoke cover plate 11a of the upper stator support 11.

[0043] Specifically, a vertically arranged wire guide plate 13b is provided at the wire guide structure 13. The wire guide plate 13b is an integral injection molded plate-shaped structure formed on the stator support 1 and stands vertically. Furthermore, a horizontally / inclined isolation rib 13c is provided at the wire guide plate 13b. The isolation rib 13c is an integral injection molded plate-shaped structure formed on the wire guide plate 13b and is horizontally / inclined. In this embodiment, all isolation ribs 13c are horizontally arranged. There is a gap between each isolation rib 13c, which is a wire guide groove 13a. There is also a gap between the isolation rib 13c and the end face of the stator support 1, which is also a wire guide groove 13a.

[0044] Furthermore, the wire-passing structure 13 has several wire-passing notches 13d at the wire-passing upright plate 13b. In fact, the wire-passing notch 13d is an integral injection-molded notch-shaped structural feature at the wire-passing upright plate 13b. Each wire-passing notch 13d is connected to at least one wire-passing groove 13a. That is, each wire-passing notch 13d has a different extension length, allowing the wire-passing notch 13d to extend to different wire-passing grooves 13a. The wire-passing notch 13d allows the wire to pass through. This configuration makes it easy for the wire to cross the wire-passing upright plate 13b.

[0045] Furthermore, the height h of the wire groove 13a is 1mm to 5mm, so that the wire groove 13a has a reasonable limiting size, thereby making it difficult for the wire to dislodge in the wire groove 13a.

[0046] Furthermore, the outer ring surface of the yoke 21 of the stator core 2 is exposed to the upper stator support 11 and the lower stator support 12 to improve the heat dissipation performance of the stator core 2; the inner ring surface of the shoe portion 23 of the stator core 2 is exposed to the upper stator support 11 and the lower stator support 12 to improve the magnetic conductivity and / or heat dissipation performance of the stator core 2.

[0047] In this embodiment, the stator assembly first assembles the upper stator support 11 and the lower stator support 12 of the stator support 1 with the stator core 2. Then, enameled wire is wound onto the teeth 22 of the stator core 2 with a predetermined number of turns (at this time, the teeth 22 of the stator core 2 are shielded by the upper stator support 11 and the lower stator support 12) to obtain the winding body 31. The end conductor segment is led out from the winding body 31, which is the stator winding 3's input / output structure 32. The input / output structure 32 passes through the wire passage notch 13d of the wire passage structure 13, and according to the different phases of the stator winding 3, the input / output structure 32 is embedded in the different wire passage slots 13a of the wire passage structure 13. In this way, the stator winding 3 can achieve physical isolation between the input and output structures 32 of different phases. That is, the input and output structures 32 of different phases are isolated by the isolation ribs 13c, thereby achieving phase-to-phase insulation performance and a certain electromagnetic shielding performance. In addition, the wire groove 13a can provide mechanical support and mechanical protection structure for the input and output structures 32 of the stator winding 3, effectively avoiding dislocation and wear of the input and output structures 32. Finally, the snap-fit ​​structure of the insulating cover plate 14 and the snap-fit ​​structure of the lower stator support 12 are fastened together, thereby achieving mutual fixation between the insulating cover plate 14 and the lower stator support 12, thus completing the assembly process of the stator assembly in this embodiment.

[0048] This embodiment also provides an electric motor, which includes the stator assembly described above.

[0049] In this embodiment, the stator support 1, stator assembly, and motor using it are provided with a plurality of mutually isolated wire passage slots 13a at the wire passage structure 13. The wire passage slots 13a allow wires to be embedded therein. The stator support 1 has the characteristics of reasonable and compact structure and low manufacturing cost. According to the different phases of the stator winding 3, the input and output wire structures 32 are embedded in different wire passage slots 13a of the wire passage structure 13, so that the input and output wire structures 32 of the stator winding 3 in different phases can be physically isolated. In addition, the wire passage slots 13a can provide mechanical support structure and mechanical protection structure for the input and output wire structures 32 of the stator winding 3, effectively avoiding the dislocation and wear of the input and output wire structures 32.

[0050] In this embodiment, the stator assembly and the motor using it include a stator bracket 1 that includes at least an insulating cover plate 14 for shielding at least a portion of the stator core 2 and / or stator winding 3, providing a reasonable and reliable shielding structure for the stator assembly. By shielding the stator core 2 and / or stator winding 3 with the insulating cover plate 14, on the one hand, the stator core 2 and / or stator winding 3 are less prone to mechanical friction and collision, thereby reducing the possibility of mechanical damage to the stator core 2 and / or stator winding 3. On the other hand, it isolates the stator core 2 and / or stator winding 3 from liquid and moisture erosion to a certain extent, thereby reducing the possibility of corrosion of the stator core 2 and / or stator winding 3. It can also prevent accidental contact by personnel, thereby preventing injury or leakage accidents caused by the stator core 2 and / or stator winding 3.

[0051] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stator assembly, comprising a stator support, a stator core, and stator windings; The stator bracket is sleeved on the stator core to shield at least a portion of the stator core; The stator winding is wound around the stator core; Its features are, The stator support includes at least an insulating cover plate; The insulating cover is fixedly disposed at the stator support and is used to shield at least a portion of the stator core and / or the stator winding.

2. The stator assembly according to claim 1, characterized in that, The stator core includes an annular yoke, a plurality of teeth formed in the inner ring of the yoke, and a boot formed at the free end of the teeth. The stator winding includes a winding body and an input / output wire structure; The stator winding body is wound around the teeth of the stator core, and the stator winding's input and output wire structures are led out to the stator support.

3. The stator assembly according to claim 2, characterized in that, The stator support includes an upper stator support and a lower stator support; The upper stator support includes an annular upper yoke cover plate, a plurality of upper tooth profile grooves formed in the inner ring of the upper yoke cover plate, and an upper boot profile groove formed at the free end of the upper tooth profile grooves. The upper yoke cover plate of the upper stator bracket abuts against the yoke of the stator core, the upper tooth groove of the upper stator bracket is sleeved on the tooth of the stator core, and the upper shoe groove of the upper stator bracket is sleeved on the shoe of the stator core. The lower stator support includes an annular lower yoke cover plate, a plurality of lower tooth profile grooves formed in the inner ring of the lower yoke cover plate, and a lower boot profile groove formed at the free end of the lower tooth profile grooves. The lower yoke cover plate of the lower stator support abuts against the yoke of the stator core, the lower tooth profile groove of the lower stator support is sleeved on the tooth of the stator core, and the lower shoe profile groove of the lower stator support is sleeved on the shoe of the stator core.

4. The stator assembly according to claim 3, characterized in that, The insulating cover plate covers the end face of the lower stator support.

5. The stator assembly according to claim 4, characterized in that, The insulating cover plate is fixed to the end face of the lower stator bracket by at least one of the following methods: snap fastening, screw locking, integral injection molding, and adhesive bonding.

6. The stator assembly according to any one of claims 1-5, characterized in that, The insulating cover is configured as a ring structure or a plate structure.

7. The stator assembly according to any one of claims 2-5, characterized in that, The stator support is equipped with a wire-passing structure; The wire-passing structure is provided with several mutually isolated wire-passing slots; The stator winding's input and output wire structure is embedded in the wire passage slot of the stator bracket.

8. The stator assembly according to claim 7, characterized in that, The wire-passing structure is provided with a vertically arranged wire-passing plate, and the wire-passing plate is provided with a horizontally arranged / inclined isolation rib. There is a gap between each of the isolation ribs, and this gap is the wire passage groove; There is also a gap between the isolation rib and the end face of the stator bracket, which is also the wire passage groove; The cable guide structure has several cable guide notches at the cable guide plate. Each of the aforementioned wire-passing gaps is connected to at least one of the aforementioned wire-passing slots; The stator winding's input / output wire structure passes through the wire passage gap in the wire passage structure.

9. The stator assembly according to any one of claims 3-5, characterized in that, The outer ring surface of the yoke of the stator core is exposed outside the upper stator support and the lower stator support; The inner annular surface of the shoe portion of the stator core is exposed outside the upper stator support and the lower stator support.

10. An electric motor, characterized in that, It includes the stator assembly as described in any one of claims 1-9.

Images