CN220732446U - Injection molding structure for motor stator of compressor, stator winding and electric compressor - Google Patents

Abstract

The application provides a compressor motor stator structure of moulding plastics, stator winding and electric compressor, compressor motor stator structure of moulding plastics includes stator core and integral type insulating skeleton, and integral type insulating skeleton moulds plastics in stator core, and the tip of stator core is stretched out respectively at the both ends of integral type insulating skeleton. The design of this stator injection structure can simplify the assembly step, improves assembly efficiency, increases groove effective area, improves overall structure's stability and reliability.

Description

Injection molding structure for motor stator of compressor, stator winding and electric compressor

Technical Field

The utility model relates to the field of compressors, in particular to a compressor motor stator injection molding structure, a stator winding and an electric compressor.

Background

With the great popularization of new energy automobiles, the electric compressor is widely applied. The enameled wire in the compressor stator and the stator core are required to be separated by insulating materials, so that insulation failure is prevented. The conventional design is that skeleton fixing holes are formed at two ends of a stator core and used for installing an upper insulating skeleton and a lower insulating skeleton, then a positioning groove is formed on the stator core, and groove insulating paper is inserted into the positioning groove, so that the insulation purpose is achieved.

The inventor researches find that the existing motor of the electric compressor has at least the following disadvantages:

the upper insulating framework and the lower insulating framework are inserted into slots on the stator core, and the assembly is complicated; the upper insulating framework and the lower insulating framework are in clearance fit with the slot, and the effective area of the slot is small; the upper insulating framework and the lower insulating framework are two independent components, and are assembled into the stator core, a gap is formed between the upper insulating framework and the lower insulating framework, so that the reliability is poor.

Disclosure of Invention

The utility model aims to provide a compressor motor stator injection molding structure, a stator winding and an electric compressor, which can enhance the structural compactness, increase the effective area of a groove and improve the stability and the reliability.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides a compressor motor stator injection molding structure comprising:

stator core and integral type insulating skeleton, integral type insulating skeleton mould plastics in stator core, just the both ends of integral type insulating skeleton stretch out respectively stator core's tip.

In an alternative embodiment, the stator core includes an integrated outer ring and a plurality of inner support bars, the plurality of inner support bars are all located in an area surrounded by the outer ring, and adjacent inner support bars have a space in the circumferential direction of the outer ring; the integral insulating framework covers the inner peripheral surface of the outer ring and part of the surface of the inner supporting bar.

In an alternative embodiment, a thickened portion is arranged on one side, away from the inner peripheral surface of the outer ring, of the inner support bar, the thickened portion is provided with two side surfaces and an inner end surface, the two side surfaces are arranged at intervals in the circumferential direction of the outer ring, the inner end surface and the two side surfaces are exposed out of the integral insulation framework.

In an alternative embodiment, the outer ring and the adjacent inner support bar together define a gradual change type slot, and the integral insulation skeleton is embedded in the gradual change type slot.

In an alternative embodiment, a plurality of through grooves are provided on the outer circumferential surface of the stator core, the plurality of through grooves being arranged at intervals in the circumferential direction of the stator core.

In an alternative embodiment, a plurality of grooves for accommodating the wire harness are formed at both ends of the integral insulation skeleton.

In an alternative embodiment, a positioning protrusion or a positioning groove is arranged on the end face of the stator core, and the integral insulation framework is mutually meshed with the positioning protrusion or the positioning groove through injection molding.

In an alternative embodiment, the positioning protrusion is a circular protrusion, or the positioning groove is a circular groove.

In a second aspect, the present utility model provides a stator winding comprising:

the injection molded compressor motor stator structure of any one of the preceding embodiments.

In a third aspect, the present utility model provides an electric compressor comprising:

the injection molding structure of the compressor motor stator according to the foregoing embodiment.

The embodiment of the utility model has the beneficial effects that:

to sum up, the injection molding structure of the compressor motor stator provided by the embodiment directly injects the integrated insulation framework on the stator core, the stator core is tightly matched with the integrated insulation framework, gaps are basically not present, the effective area of the groove is increased, and meanwhile, the reliability and the stability are improved. In addition, the integral insulating framework and the stator core are injection molded into an integral structure, joints are not present, assembly steps are simplified, and assembly efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a compressor motor stator injection molding structure according to an embodiment of the present utility model;

fig. 2 is an exploded view of an injection molding structure of a stator of a compressor motor according to an embodiment of the present utility model.

Icon:

100-stator core; 110-an outer ring; 111-positioning grooves; 112-through slots; 120-inner support bar; 130-thickening; 131-side; 132-inner end face; 140-gradual slot; 200-an integral insulating framework.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the prior art, the stator core 100, the upper insulating framework and the lower insulating framework are independent components, the stator core 100 is provided with a slot, the upper insulating framework and the lower insulating framework are respectively inserted into the slot from two ends of the stator core 100, the upper insulating framework and the lower insulating framework are in clearance fit with the stator core 100, the reliability is poor, and the effective area of the slot is small. In addition, the upper insulating framework and the lower insulating framework are required to be matched with the stator core 100 in a plugging manner step by step, the steps are complex, the assembly efficiency is low, and the assembly cost is high.

In view of this, the designer provides a compressor motor stator injection molding structure that can simplify assembly steps, improve assembly efficiency, increase slot effective area, and improve overall structure stability and reliability.

Referring to fig. 1-2, in the embodiment, the injection molding structure of the compressor motor stator includes a stator core 100 and an integral insulation framework 200, the integral insulation framework 200 is injection molded on the stator core 100, and two ends of the integral insulation framework 200 respectively extend out of the ends of the stator core 100.

Based on above-mentioned technical scheme, the compressor motor stator injection structure that this application provided has following advantage at least:

this compressor motor stator structure of moulding plastics directly moulds plastics integral type insulating skeleton 200 on stator core 100, and stator core 100 and integral type insulating skeleton 200 close fit do not basically have the clearance, and the groove effective area increases, has improved reliability and stability simultaneously. In addition, the integral insulating framework 200 and the stator core 100 are injection molded into an integral structure, no seam exists, and the stability is high. Compared with the prior art, the assembly method has the advantages that the step-by-step splicing assembly is needed, the assembly steps are simplified, the assembly efficiency is improved, and the assembly cost is reduced.

The following examples illustrate the details of injection molded structures for compressor motor stators provided herein.

In this embodiment, alternatively, the stator core 100 includes an outer ring 110 and a plurality of inner support bars 120 integrally formed. The inner support bars 120 are located in the area surrounded by the outer ring 110, the inner support bars 120 are uniformly distributed at intervals in the circumferential direction of the outer ring 110, and adjacent inner support bars 120 have intervals in the circumferential direction of the outer ring 110 to form gradual change type slots 140 for assembling the integrated insulation framework 200, and the outer contour of the gradual change type slots 140 is approximately fan-shaped. That is, the outer ring 110 and the adjacent two inner support bars 120 are matched to form the gradual change type slots 140, the number of the gradual change type slots 140 is set according to the requirement, and the integral insulation skeleton 200 is injection-molded in the gradual change type slots 140. Meanwhile, the outer ring 110 has two end surfaces in the axial direction thereof, a plurality of positioning protrusions or positioning grooves 111 which are uniformly arranged at intervals in the circumferential direction of the outer ring 110 can be arranged on each end surface, the positioning protrusions can be circular protrusions, the positioning grooves 111 can be circular grooves, and the design is such that after the integral insulation framework 200 is injection-molded on the stator core 100, the integral insulation framework 200 can form a concave-convex occlusion structure with the positioning protrusions or the positioning grooves 111, so that the stability and reliability of the integral structure are improved. Because the positioning protrusion is a circular protrusion, the positioning groove 111 is a circular groove, the integrated insulation framework 200 can form a groove matched with the positioning protrusion and a protrusion matched with the positioning groove 111, and the positioning protrusion is a circular surface matched, so that the situation of stress concentration is not easy to exist, and the stability is high.

Alternatively, a plurality of through grooves 112 are provided on the outer circumferential surface of the outer ring 110, and the plurality of through grooves 112 are uniformly spaced apart in the circumferential direction of the stator core 100. Each through slot 112 may be a rectangular slot to facilitate disassembly and assembly of the stator core 100.

Further, the inner support bar 120 has a thickened portion 130 at a side far from the inner circumferential surface of the outer ring 110, the thickened portion 130 has two side surfaces 131 arranged at intervals in the circumferential direction of the outer ring 110 and an inner end surface 132 located between the two side surfaces 131, and both the inner end surface 132 and the two side surfaces 131 are exposed to the outside of the integrated insulation skeleton 200. That is, after the integral insulation frame 200 is injection-molded to the stator core 100, the integral insulation frame 200 covers the inner circumferential surface of the outer ring 110 and a portion of the surface of the inner support bar 120, exposing the inner end surface 132 and the both side surfaces 131 of the inner support bar 120, facilitating the assembly of the stator core 100 with other components. After the integral insulation framework 200 is injection molded with the stator core 100, the parts inserted into the gradual change slots 140 of the stator core 100 are also connected into a whole, and the whole integral insulation framework 200 has high stability, high reliability and long service life.

And, after the injection molding of integral insulation skeleton 200 and stator core 100, the both ends of integral insulation skeleton 200 form the recess that supplies the pencil to wind and establish, avoid the pencil to deviate from stator core 100's center, improve the stability that the pencil was wound and established.

In this embodiment, there are at least the following disadvantages compared to the existing stator windings:

1. compared with the prior art, the integral injection molding reduces the assembly procedures of the upper insulating framework, the lower insulating framework and the stator core 100, simplifies the steps and improves the assembly efficiency.

2. The effective area of the groove is increased, the groove filling rate is reduced, the winding difficulty is reduced, and the method is as follows:

the prior art comprises the following steps: in order to ensure the insulation frame injection molding and strength requirements, the thickness of the frame slot must be above 0.5mm, and in order to simplify assembly and prevent plastic deformation, the slots of the frame slot and the stator core 100 are in clearance fit (the clearance needs to be above 0.1 mm), so that the slot effective area of the motor assembly after fit is reduced.

The technical proposal of the application is as follows: the thickness of the integrally injection molded skeleton groove can be ensured to be below 0.3 mm. Compared with the prior art, the effective area of the stator slot is increased, the same winding slot is small in filling rate, and winding is easier.

3. The assembly gap of the upper and lower insulating frameworks is eliminated, and the reliability is improved, specifically as follows:

the prior art comprises the following steps: because the length tolerance of the stator core 100 is more than 0.5mm, and the injection molding tolerance of the upper and lower insulating frameworks is large (0.1 mm), gaps are left after the upper and lower insulating frameworks are assembled, if the length of the stator core 100 is short, the upper and lower insulating frameworks are raised after being assembled, and the insulating frameworks have the risk of fragmentation after winding; the winding wire winding process can cause the possibility of too close or contact between the winding and the iron core, so that the electrical performance of the motor is not satisfactory.

The technical scheme of the application is as follows: the integral insulating framework 200 wraps part of the surface of the stator core 100 by adopting integral injection molding, and the plastic can completely isolate the winding from the stator core 100, thereby avoiding the contact between the winding and the stator core 100 and increasing the reliability.

The embodiment also provides a stator winding, which comprises the injection molding structure of the stator of the compressor motor.

The present embodiment also provides an electric compressor including the stator winding mentioned in the above embodiment.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A compressor motor stator injection molding structure, comprising:

stator core (100) and integral type insulating skeleton (200), integral type insulating skeleton (200) mould plastics in stator core (100), just the both ends of integral type insulating skeleton (200) stretch out respectively the tip of stator core (100).

2. The injection molded compressor motor stator structure of claim 1, wherein:

the stator core (100) comprises an integrated outer ring (110) and a plurality of inner support bars (120), wherein the inner support bars (120) are all positioned in an area surrounded by the outer ring (110), and adjacent inner support bars (120) have intervals in the circumferential direction of the outer ring (110); the integral insulation skeleton (200) covers an inner circumferential surface of the outer ring (110) and a part of the surface of the inner support bar (120).

3. The injection molded compressor motor stator structure of claim 2, wherein:

one side of the inner support bar (120) far away from the inner peripheral surface of the outer ring (110) is provided with a thickening part (130), the thickening part (130) is provided with two side surfaces (131) which are arranged at intervals in the circumferential direction of the outer ring (110) and an inner end surface (132) which is positioned between the two side surfaces (131), and the inner end surface (132) and the two side surfaces (131) are exposed out of the integrated insulating framework (200).

4. The injection molded compressor motor stator structure of claim 2, wherein:

the outer ring (110) and the adjacent inner support bars (120) jointly define a gradual change type slot (140), and the integral insulation framework (200) is embedded into the gradual change type slot (140).

5. The injection molded compressor motor stator structure of claim 1, wherein:

a plurality of through grooves (112) are formed in the outer peripheral surface of the stator core (100), and the through grooves (112) are arranged at intervals in the circumferential direction of the stator core (100).

6. The injection molded compressor motor stator structure of claim 1, wherein:

two ends of the integrated insulation framework (200) are provided with a plurality of grooves for accommodating wire harnesses.

7. The injection molded compressor motor stator structure of claim 1, wherein:

the end face of the stator core (100) is provided with a positioning protrusion or a positioning groove (111), and the integral insulation framework (200) is in injection molding engagement with the positioning protrusion or the positioning groove (111).

8. The injection molded compressor motor stator structure of claim 7 wherein:

the positioning protrusion is a circular protrusion, or the positioning groove (111) is a circular groove.

9. A stator winding, the stator winding comprising:

the compressor motor stator injection molding structure of any one of claims 1-8.

10. An electric compressor, characterized in that it comprises:

the compressor motor stator injection molding structure of claim 9.