CN210780253U - Plastic package stator and plastic package motor using same - Google Patents

Abstract

The utility model discloses a plastic package stator and plastic package motor using the same, which comprises a stator core, an end insulation, a coil winding and a plastic package body, wherein the stator core comprises a yoke part and a plurality of tooth parts protruding from the inner side of the yoke part, a slot embedding groove is formed between two adjacent tooth parts, a slot insulation strip is installed in the slot embedding groove and is used for shielding the slot opening of the slot embedding groove on the motor, the slot insulation strip comprises an insulation top plate and a plurality of insulation sheets, the top parts of the insulation sheets are connected with the bottom surface of the insulation top plate, the insulation sheets are distributed along the top plate at intervals and are inserted in the slot embedding groove, an arc-shaped groove is arranged on the inner side surface of the insulation sheet, the arc-shaped groove faces to the slot opening of the slot embedding groove, the plastic package body permeates into the arc-shaped groove when in injection molding, the thickness between the insulation sheets and the slot, effectively prevent to have the hidden danger bad with stator core notch creepage distance after the enameled wire receives the impact of moulding plastics.

Description

A plastic-encapsulated stator and its application in a plastic-encapsulated motor

Technical field:

The utility model relates to a plastic-encapsulated stator and an applied plastic-encapsulated motor.

Background technique:

Existing plastic-encapsulated motors have a relatively high slot full rate for motors with high power. The enameled wire near the slot is easily swept away by the greater impact force of the BMC at the feed port, resulting in copper exposure. Due to the manufacturing process of the plastic-encapsulated motor It is determined that the enameled wire will squeeze each other after being injected with high temperature BMC fluid. Once squeezed, it is easy to expose copper and cause defects.

In the related art in the art, in order to solve the above problems, for a copper wire or aluminum wire plastic-encapsulated motor with a high slot full rate, a slot insulating strip is used at the position of the feed port and placed at the slot position. However, this solution has the following disadvantages: during injection molding, the BMC material between the notch and the notch insulation strip is too thin, which leads to easy falling off, or there will be creepage between the enameled wire and the stator core notch after being impacted by BMC. The danger of poor distance.

Utility model content:

The purpose of the utility model is to provide a plastic-encapsulated stator and a plastic-encapsulated motor applied thereto, which solves the problem that the BMC material between the notch and the notch insulation strip in the prior art is too thin, which leads to easy falling off, and the enameled wire is impacted by the BMC. There is a technical problem of the hidden danger of poor creepage distance with the slot of the stator core.

The purpose of this utility model is achieved through the following technical solutions.

The purpose of this utility model is to provide a plastic-encapsulated stator, which includes a stator iron core, an end insulation installed on the stator iron core, a coil winding wound on the end insulation, and a plastic encapsulation body. The stator iron core includes a yoke and a slave yoke. There are several teeth protruding from the inner side of the groove, a wire slot is formed between two adjacent teeth, the inner side of the teeth is surrounded by an inner hole, and a slot insulation strip is installed in the wire slot. The slot of the wire slot is shielded, and the stator core, the end insulation, the coil winding and the slot insulation strip are injection-molded into a whole by the plastic body. The top of the insulating sheet is connected to the bottom surface of the insulating top plate. Several insulating sheets are distributed along the top plate. The insulating top plate is supported on the end insulation. The insulating sheet is inserted into the wire slot. The groove is facing the slot of the wire-embedding groove, and the plastic body penetrates into the arc groove during injection molding.

The insulating top plate is provided with a plurality of exhaust holes, the outer side of the insulating sheet is provided with a first exhaust groove, and the exhaust holes are communicated with the first exhaust groove.

A number of protrusions protrude from the bottom surface of the insulating top plate, and a gap is formed between the protrusions and the insulating sheet. The inner side surface of the protrusion is provided with a second exhaust groove, and the second exhaust groove is communicated with the exhaust hole.

The raised outer side is a bevel.

The number of several insulating sheets is 2 or 4.

The insulating top plate is a flat plate, the insulating top plate is arc-shaped, and a plurality of grooves are arranged on the outer side wall of the insulating top plate, and the grooves are located between the two insulating sheets.

The bottom of the insulating sheet is tapered.

The first vent groove and the second vent groove are semicircular grooves.

Coil windings are wound on the yoke.

A plastic-encapsulated motor, comprising a plastic-encapsulated stator, is characterized in that: the plastic-encapsulated stator is the above-mentioned plastic-encapsulated stator.

Compared with the prior art, the utility model has the following effects:

1) The utility model includes a stator core, an end insulation installed on the stator core, a coil winding and a plastic sealing body wound on the end insulation, and the stator core includes a yoke and a number of teeth protruding from the inside of the yoke. A wire slot is formed between two adjacent tooth parts, the inner side of the tooth part is surrounded by an inner hole, a slot insulation strip is installed in the wire slot, and the slot insulation strip is used to block the slot of the wire insertion slot on the motor. , the stator core, end insulation, coil windings and slot insulation strips are injected into a whole through the plastic sealing body, which is characterized in that: the slot insulation strips include an insulating top plate and a number of insulating sheets, the tops of the several insulating sheets and the bottom surface of the insulating top plate Connection, a number of insulating sheets are spaced along the top plate, the insulating top plate is supported on the end insulation, the insulating sheet is inserted into the wire slot, the inner side of the insulating sheet is provided with an arc slot, and the arc slot faces the slot of the wire slot. It can increase the thickness between the insulating sheet and the slot of the wire-embedding slot, and improve the bonding force between the slot insulating strip and the stator core after injection molding, and the overall structural strength is high. Effectively prevent the hidden danger of poor creepage distance from the stator core slot after the enameled wire is impacted by injection molding;

2) Other advantages are described in detail in specific embodiments.

Description of drawings:

1 is a perspective view of Embodiment 1 of the present invention;

2 is an exploded perspective view of Embodiment 1 of the present invention;

3 is a perspective view of the stator core in Embodiment 1 of the present invention;

Fig. 4 is the front view of the first embodiment of the present utility model;

Fig. 5 is the sectional view of AA in Fig. 4;

Fig. 6 is the partial enlarged view of B in Fig. 5;

7 is a perspective view of a slot insulating strip in Embodiment 1 of the present invention;

Fig. 8 is another perspective view of the notch insulating strip in the first embodiment of the present invention;

9 is a schematic structural diagram of a slot insulating strip in Embodiment 1 of the present invention;

Figure 10 is a front view of the notch insulating strip in the first embodiment of the present invention;

FIG. 11 is a cross-sectional view taken along CC in FIG. 10 .

Detailed ways:

The present utility model will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

Example 1:

As shown in FIG. 1 to FIG. 11 , this embodiment provides a plastic-encapsulated stator, which includes a stator core 1 , an end insulation 2 mounted on the stator core 1 , and a coil wound on the end insulation 2 The winding 3 and the plastic package, the stator core 1 includes a yoke 11 and a plurality of teeth 12 protruding from the inner side of the yoke 11, a wire insertion slot 13 is formed between two adjacent teeth 12, and the inner side of the teeth 12 is surrounded by Inner hole 14, slot insulation strip 4 is installed in wire insertion slot 13, slot insulation strip 4 is used to block slot 131 of wire insertion slot 13 on the motor, stator core 1, end insulation 2, coil winding 3 and The slotted insulating strip 4 is molded into a whole by a plastic body, and is characterized in that: the slotted insulating strip 4 includes an insulating top plate 41 and a plurality of insulating sheets 42, the tops of the insulating sheets 42 are connected with the bottom surface 411 of the insulating top plate 41, and the insulating sheets 42 are distributed at intervals along the top plate 41, the insulating top plate 41 is supported on the end insulation 2, the insulating sheet 42 is inserted into the wire insertion groove 13, and the inner side 421 of the insulating sheet 42 is provided with an arc-shaped groove 422, and the arc-shaped groove 422 faces The slot 131 of the wire-embedding slot 13 penetrates into the arc-shaped slot 422 when the plastic body is injected, which can increase the thickness between the insulating sheet 42 and the slot 131 of the wire-inserting slot 42, and increase the slot insulation strip 4 and the stator core. 1. The bonding force after injection molding and the overall structural strength are high, which can effectively prevent the hidden danger of poor creepage distance between the enameled wire and the slot of the stator core after being impacted by injection molding.

The insulating top plate 41 is provided with a number of exhaust holes 412, and the outer side surface 422 of the insulating sheet 42 is provided with a first exhaust slot 423. The exhaust hole 412 is in communication with the first exhaust slot 423, which is convenient for exhausting when injection molding BMC. .

A number of protrusions 413 protrude from the bottom surface 411 of the insulating top plate 41, and a gap 410 is formed between the protrusions 413 and the insulating sheet 42. The inner side surface 414 of the protrusion 413 is provided with a second exhaust groove 415. The second exhaust groove 415 It is communicated with the vent hole 412, which is convenient for venting during injection molding of BMC.

The outer side surface 416 of the protrusion 413 is an inclined surface, so as to avoid breaking the enamel skin of the enameled wire when assembling the notch insulating strip 4 .

The number of the insulating sheets 42 is two or four.

The insulating top plate 41 is a flat plate, the insulating top plate 41 is arc-shaped, and a plurality of grooves 418 are provided on the outer side wall surface 417 of the insulating top plate 41. The raised tabs on the end insulation are interfering.

The bottom of the insulating sheet 42 is tapered, which is convenient for the insulating sheet 42 to be inserted into the wiring slot 13 .

The first exhaust groove 423 and the second exhaust groove 415 are semicircular grooves.

The coil winding 3 is wound on the yoke 11 .

Embodiment 2:

A plastic-encapsulated motor, comprising a plastic-encapsulated stator, is characterized in that: the plastic-encapsulated stator is the plastic-encapsulated stator described in the first embodiment.

The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention shall be The replacement modes that are equivalent are all included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a plastic envelope stator, including stator core (1), install tip insulation (2) on stator core (1), coil winding (3) and the plastic envelope body around on tip insulation (2), stator core (1) include yoke portion (11) and from yoke portion (11) inboard convex a plurality of tooth portion (12), form rule groove (13) between two adjacent tooth portion (12), hole (14) are enclosed into to the inboard of tooth portion (12), install notch insulating strip (4) in rule groove (13), notch insulating strip (4) are used for sheltering from notch (131) of rule groove (13), stator core (1), tip insulation (2), coil winding (3) and notch insulating strip (4) are moulded plastics into a whole through the plastic envelope body, its characterized in that: notch insulating strip (4) are including insulating roof (41) and a plurality of insulating piece (42), the top of a plurality of insulating pieces (42) is connected with bottom surface (411) of insulating roof (41), roof (41) interval distribution is followed in a plurality of insulating pieces (42), insulating roof (41) support on tip is insulating (2), insulating piece (42) cartridge is in rule groove (13), be equipped with arc wall (422) on medial surface (421) of insulating piece (42), arc wall (422) are towards notch (131) of rule groove (13), infiltration is in arc wall (422) when the plastic-sealed body is moulded plastics.

2. The plastic package stator according to claim 1, wherein: a plurality of exhaust holes (412) are formed in the insulating top plate (41), a first exhaust groove (423) is formed in the outer side face (422) of the insulating sheet (42), and the exhaust holes (412) are communicated with the first exhaust groove (423).

3. The plastic package stator according to claim 1 or 2, wherein: a plurality of bulges (413) protrude from the bottom surface (411) of the insulating top plate (41), a gap (410) is formed between each bulge (413) and the corresponding insulating sheet (42), a second exhaust groove (415) is formed in the inner side surface (414) of each bulge (413), and the second exhaust groove (415) is communicated with the exhaust holes (412).

4. The plastic package stator according to claim 3, wherein: the outer side surface (416) of the protrusion (413) is an inclined surface.

5. The plastic package stator according to claim 4, wherein: the number of the insulating sheets (42) is 2 or 4.

6. The plastic package stator according to claim 5, wherein: the insulating top plate (41) is a flat plate, the insulating top plate (41) is arc-shaped, a plurality of grooves (418) are arranged on the outer side wall surface (417) of the insulating top plate (41), and the grooves (418) are positioned between the two insulating sheets (42).

7. The plastic package stator according to claim 6, wherein: the bottom of the insulation sheet (42) is conical.

8. The plastic package stator according to claim 3, wherein: the first exhaust groove 423 and the second exhaust groove 415 are semicircular grooves.

9. The plastic package stator according to claim 3, wherein: the coil winding (3) is wound around the yoke (11).

10. The utility model provides a plastic envelope motor, includes plastic envelope stator, its characterized in that: the plastic stator is the plastic stator according to any one of claims 1 to 9.

Images