CN216390655U - Injection molding stator and plastic packaging motor comprising same - Google Patents

Abstract

The utility model provides an injection molding stator and a plastic package motor comprising the same. The stator of moulding plastics includes: the stator assembly comprises a wound stator and a circuit board electrically connected with the wound stator; the injection molding machine comprises an injection molding shell, wherein a stator cavity is formed in the injection molding shell, a stator assembly is located in the stator cavity, and the stator assembly and the injection molding shell form an integral injection molding structure. The utility model forms the injection molding shell through integrated injection molding, integrates the stator cavity, the magnetic ring cavity and the bearing seat, and simultaneously, the stator component is integrally injected into the injection molding shell, so that the strong and weak current common-plate circuit board is arranged in the injection molding shell.

Description

Injection molding stator and plastic packaging motor comprising same

Technical Field

The utility model relates to the technical field of plastic package motors, in particular to an injection molding stator and a plastic package motor comprising the same.

Background

In recent years, with the continuous expansion of the market of household air conditioners, plastic-packaged motor products are used as important accessories of the whole machine, and the plastic-packaged motor products have larger and wider application fields and wider application.

The existing plastic package motor industry technology mainly adopts structural modes such as strong and weak current circuit separation, strong current built-in injection molding, PG Hall circuit external assembly, end cover interference assembly and the like, and the existing technology has the following defects:

1. the whole machine has various assembly parts, complex assembly process, low production efficiency and automation degree and higher labor and material cost.

2. The injection molding stator and the end cover are assembled in an interference manner, and the interference size fluctuation easily causes the quality hidden troubles such as the loosening of the end cover or the cracking of the plastic packaging material; meanwhile, the motor is not integrally formed, the concentricity of an end cover bearing chamber and an injection molding stator is enlarged, and the electromagnetic noise of the motor is easily induced due to the eccentricity of a mechanical structure.

3. The winding stator is completely wrapped by the plastic package material in an injection molding mode, and heat is required to be transferred to the air through the plastic package material to dissipate heat in the operating state of the motor, so that the effective heat dissipation area is small, the temperature of the motor is increased, and the motor is easy to insulate, age and even burn.

4. The PG Hall circuit is independently assembled externally, and the assembly process is increased; the PG Hall plate leads out a signal wire through a wire outlet formed by the end cover and the PG wire passing groove, an assembly gap exists between the lead and the wire outlet, and in a specific warm and humid environment, foreign matters such as micro organisms such as ants and dust easily enter an inner cavity of the motor from the gap, so that hidden dangers such as motor jamming and circuit burning are caused.

5. The shaft head has no effective protection measure, water and dust easily enter the inner cavity of the motor directly from the shaft outlet hole and the Hall wire outlet, so that the protection is invalid, and the popularization and application occasions of the plastic package motor are greatly limited.

In order to overcome the defects of the prior art, the utility model provides an integrated injection molding stator assembly and a high-protection plastic package motor using the same.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an injection stator and a plastic package motor including the same, which are used for at least solving the technical problems of complex assembly and poor protection performance of the injection stator in the prior art, and specifically comprise the following steps:

in a first aspect, the present invention provides an injection molded stator comprising:

the stator assembly comprises a wound stator and a circuit board electrically connected with the wound stator;

the injection molding shell is internally provided with a stator cavity, the stator assembly is positioned in the stator cavity,

the stator assembly and the injection molding shell form an integral injection molding structure.

Further optionally, the injection-molded housing includes a side peripheral wall and first and second bottom walls formed at both ends of the side peripheral wall,

the first bottom wall is formed with a rotor mounting hole for mounting a rotor into the wound stator,

the bearing seat is formed by protruding outwards along the axial direction of the second bottom wall, a magnetic ring cavity is formed between the bearing seat and the stator cavity, and the magnetic ring cavity is communicated with the stator cavity and the bearing seat.

Further optionally, a first reinforcing rib is arranged on the outer side surface of the second bottom wall, a groove is formed between every two adjacent first reinforcing ribs, and the groove is inclined from the bearing seat to the edge of the second bottom wall.

Further optionally, a second reinforcing rib is arranged on the outer peripheral wall of the bearing seat, and the second reinforcing rib is parallel to the axis of the bearing seat and is arranged in a plurality of circumferential directions of the bearing seat.

Further optionally, the end of the bearing seat is provided with a sealing structure, the sealing structure forms an annular convex structure along the circumferential direction of the bearing seat,

the inner peripheral wall of the seal structure is a tapered surface formed by tapering in a direction toward the bearing seat.

Further optionally, the stator assembly further comprises an outlet clamp, a portion of the outlet clamp is integrally injection molded within the injection molded housing,

and the circuit of the circuit board penetrates out through the wire outgoing clamp.

Further optionally, the circuit board is integrally injection molded in the injection molded housing,

and the circuit board is provided with a Hall circuit and a Hall element.

In a second aspect, the utility model provides a plastic package motor, which comprises the injection molding stator.

In a third aspect, the utility model provides a plastic package motor, comprising the injection molding stator,

the plastic package motor also comprises a rotor component, the rotor component comprises a rotor and a motor shaft which is arranged on the rotor in a penetrating way,

the motor shaft is also provided with a front end bearing, a rear end bearing and a magnetic ring, the front end bearing and the rear end bearing are respectively arranged on two sides of the rotor, and the magnetic ring is positioned between the front end bearing and the rotor;

the rotor is rotatably arranged on the inner side of the winding stator, the front end bearing is fixedly arranged in the bearing seat, and the magnetic ring is positioned in the magnetic ring cavity;

the plastic package motor further comprises a rear end cover, the rear end cover covers the rotor mounting hole, and a rear end bearing is fixedly arranged in the rear end cover.

Further optionally, a protective cover is further arranged on the motor shaft, and the protective cover covers the end of the bearing seat.

Further optionally, the plastic package motor further includes:

the front damping ring is sleeved on the outer side of the bearing block; and/or the presence of a gas in the gas,

and the rear damping ring is sleeved on the outer side of the rear end cover.

The utility model forms the injection molding shell through integrated injection molding, integrates the stator cavity, the magnetic ring cavity and the bearing seat, and simultaneously, the stator component is integrally injected into the injection molding shell, so that the strong and weak current common-plate circuit board is arranged in the injection molding shell.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.

FIG. 1 shows a schematic view of an injection molded stator structure according to an embodiment of the utility model;

FIG. 2 shows a schematic cross-sectional view of an injection molded stator of an embodiment of the present invention;

FIG. 3 illustrates a structural schematic view of a stator assembly of an embodiment of the present invention;

fig. 4 shows a schematic structural diagram of a plastic package motor according to an embodiment of the utility model;

fig. 5 is a schematic cross-sectional view of a plastic package motor according to an embodiment of the present invention;

FIG. 6 shows an enlarged view at A in FIG. 5;

FIG. 7 is a schematic structural view illustrating a front suspension ring according to an embodiment of the present invention;

fig. 8 shows a schematic structural diagram of a protective cover according to an embodiment of the utility model.

In the figure:

1. injection molding the housing; 11. a first bottom wall; 12. a second bottom wall; 121. a first reinforcing rib; 13. a side peripheral wall; 14. a bearing seat; 141. a second reinforcing rib; 142. a sealing structure; 15. a magnetic ring cavity; 2. a stator assembly; 21. a wound stator; 22. a circuit board; 221. a Hall IC; 23. a wire outlet clip; 4. a motor shaft; 41. a protective cover; 5. a front end bearing; 6. a rear end bearing; 7. a rear end cap; 8. a front damping ring; 9. a rear damping ring; 10. a magnetic ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

The traditional plastic package PG motor has the following technical problems:

1. the motor has the advantages that the number of parts is large, a plurality of parts are assembled (the end cover is pressed and the Hall plate is externally arranged and assembled), the structure is suitable for dismounting and repairing of the motor, and the maintenance cost is low; but the assembly process is complex, and the processing precision of the process is greatly influenced by the fluctuation of equipment molds;

2. the protection grade is low, the protection grade of the plastic package PG motor for the wall hanging machine of the air conditioner on the market is only IP20, and the plastic package PG motor cannot be popularized and applied to severe working condition environments such as haze, humidity, high temperature and the like;

3. the end cover assembly difficulty is high, and the interference size fluctuation easily causes the quality hidden troubles such as end cover loosening or plastic package material cracking; meanwhile, the motor is not integrally formed, the concentricity of an end cover bearing chamber and an injection molding stator is enlarged, and the electromagnetic noise of the motor is easily induced due to the eccentricity of a mechanical structure;

4. an external Hall circuit board needs to be added with an assembly process; meanwhile, due to the assembly gap caused by the outgoing line of the Hall circuit board, in a specific warm and humid environment, foreign matters such as micro organisms such as ants and dust easily enter the inner cavity of the motor from the gap, so that hidden dangers such as motor jamming and circuit burn are caused;

5. the working temperature rise of the motor is reduced, and the measures for effectively improving the heat dissipation effect are few; such as high thermal conductive plastic packaging material, heat dissipation coating, and the like, require additional expensive material cost and labor cost.

The utility model forms the injection molding shell through integrated injection molding, integrates the stator cavity, the magnetic ring cavity and the bearing seat, and simultaneously, the stator component is integrally injected into the injection molding shell, so that the strong and weak current common-plate circuit board is arranged in the injection molding shell. The utility model is described in detail below with reference to specific examples:

as shown in fig. 1, 2, and 3, the present invention provides an injection-molded stator, including:

the stator assembly 2, the stator assembly 2 includes the wound stator 21, the circuit board 22 in connection with electricity of wound stator 21;

an injection molding shell 1, a stator cavity is formed inside the injection molding shell 1, a stator component 2 is positioned in the stator cavity,

stator module 2 forms whole injection structure with the shell 1 that moulds plastics, and stator module 2 is integrative to be moulded plastics inside the shell 1 that moulds plastics promptly.

Specifically, the injection-molded housing 1 is integrally injection-molded and includes a side peripheral wall 13 and a first bottom wall 11 and a second bottom wall 12 formed at both ends of the side peripheral wall 13, the side peripheral wall 13 covers the outer peripheral wall of the wound stator 21, and the first bottom wall 11 and the second bottom wall 12 respectively cover both end walls of the wound stator 21, thereby completely covering the outer wall of the wound stator 21. The bearing seat 14 formed in one step through the injection molding process reduces the material consumption of the end cover, cancels the corresponding press mounting process of the end cover, reduces the material consumption, simplifies the assembly process, solves the quality problems of cracking of the plastic package material, out-of-concentricity and the like caused by the press mounting process of the end cover of the traditional plastic package structure, effectively improves the concentricity of the inner cavity of the injection molding stator assembly 2 through the precision control of the injection mold, and weakens the electromagnetic noise of the motor caused by mechanical eccentricity.

The first bottom wall 11 is formed with a rotor mounting hole for mounting a rotor into a wound stator 21, the second bottom wall 12 is formed with a bearing seat 14 protruding outwards along the axial direction, a magnetic ring cavity 15 is formed between the bearing seat 14 and the stator cavity, and the magnetic ring cavity 15 is communicated with the stator cavity and the bearing seat 14. Preferably, the circuit board 22 is disposed on one side of the wound stator 21 and is integrally molded in the second bottom wall 12, so that the process of separately assembling the circuit board 22 is reduced, and the circuit board 22 is also molded in the second bottom wall 12, thereby improving the reliability and protection level of the installation of the circuit board 22, and making the performances of dust prevention, water prevention and the like better. The circuit board 22 is internally provided with injection molding, a PG Hall circuit assembly procedure is omitted, an assembly gap caused by the outgoing line of the circuit board 22 cannot be formed, and the quality hidden trouble that the motor is blocked and the motor is burnt due to the fact that tiny organisms or dust particle foreign matters invade into the inner cavity of the motor is eliminated.

Be provided with first strengthening rib 121 on the lateral surface of second diapire 12, preferably, first strengthening rib 121 along the radial setting of second diapire 12 and along circumference evenly distributed a plurality ofly, setting up of first strengthening rib 121 has improved the holistic structural strength of shell 1 of moulding plastics, and simultaneously, first strengthening rib 121 has still increased the area of contact of shell 1 and the air of moulding plastics, makes its radiating effect better, reduces the radiating problem of winding work, promotes motor ageing resistance.

Form the recess between two adjacent first strengthening ribs 121, the recess is the slope form to the edge of second diapire 12 from bearing frame 14, and the recess is along the radial setting of second diapire 12 promptly to reduce gradually from bearing frame 14 position to the edge of second diapire 12 and form the slope form, realize the drainage of the stator terminal surface of moulding plastics, can not cause the extrusion of water and invade the quality hidden danger of the stator inner chamber of moulding plastics.

The outer peripheral wall of the bearing seat 14 is provided with a plurality of second reinforcing ribs 141, the second reinforcing ribs 141 are parallel to the axis of the bearing seat 14 and are arranged along the circumferential direction of the bearing seat 14, and the structural strength and the heat dissipation effect of the injection molding shell 1 are further improved due to the arrangement of the second reinforcing ribs 141.

Preferably, the end of the bearing seat 14 is provided with a sealing structure 142, the sealing structure 142 forms an annular convex structure along the circumferential direction of the bearing seat 14, and the inner circumferential wall of the sealing structure 142 is a tapered surface formed to be tapered in a direction toward the bearing seat 14. The sealing structure 142 cooperates with the protective cover 41 to form a sealing fit at the end of the bearing seat 14 to prevent water, dust, etc. from entering the injection molded housing 1.

The stator assembly 2 further comprises an outlet clamp 23, a part of the outlet clamp 23 is integrally molded in the injection molding shell 1, and a line of the circuit board 22 passes through the outlet clamp 23, preferably, the outlet clamp 23 is partially located in the injection molding shell 1 and partially located outside the injection molding shell 1, and a power supply or control line on the circuit board 22 can extend out of the injection molding shell 1 through the outlet clamp 23.

The circuit board 22 is integrally molded in the injection molding shell 1, preferably, the circuit board 22 is a strong and weak electric co-plate circuit board 22, a hall circuit and a hall element are arranged on the circuit board 22, specifically, the hall circuit and the hall IC221 are arranged on the circuit board 22, a rotor cavity is formed in the winding stator 21 and used for accommodating a squirrel cage rotor, the fixed position of the hall IC221 is close to the inner wall of the cavity, the protection circuit board 22 is not exposed outside, and meanwhile, the magnetic pole signal of the magnetic ring 10 in the magnetic ring cavity 15 is effectively induced.

As shown in fig. 4, 5, and 6, the utility model further provides a plastic package motor, which includes the injection molding stator, and a rotor assembly including a rotor and a motor shaft 4 penetrating the rotor.

The motor shaft 4 is also provided with a front end bearing 5, a rear end bearing 6 and a magnetic ring 10, the front end bearing 5 and the rear end bearing 6 are respectively arranged at two sides of the rotor, and the magnetic ring 10 is positioned between the front end bearing 5 and the rotor;

the rotor is rotatably arranged at the inner side of the winding stator 21, the front end bearing 5 is fixedly arranged in the bearing seat 14, and the magnetic ring 10 is positioned in the magnetic ring cavity 15;

the plastic package motor further comprises a rear end cover 7, the rear end cover 7 covers the rotor mounting hole, and a rear end bearing 6 is fixedly arranged in the rear end cover 7.

As shown in fig. 6 and 8, the motor shaft 4 is further provided with a protective cover 41, the protective cover 41 covers the end of the bearing seat 14, and the protective cover 41 and the sealing structure 142 on the bearing seat 14 form a sealing fit, so that waterproof and dustproof effects can be achieved. No matter under motor shaft 4 to the horizontal installation or the condition of perpendicular installation, effectively prevent foreign matters such as water, dust from invading the motor inner chamber from the shaft hole, improved the waterproof dustproof ability of plastic envelope motor. Specifically, when the motor shaft 4 is installed in a vertical state, the protective cover 41 is in sealing contact with the sealing structure 142 to prevent water, dust and the like from entering; when 4 horizontal state installations of motor shaft, seal structure 142's outer wall and protection casing 41 cooperation prevent that outside water or dust from getting into, and the inner wall bevel connection structure of seal structure 142 conical surface can direct discharge ponding, prevents that the ponding from pressing the invasion motor inner chamber and leading to the protection inefficacy.

As shown in fig. 4 and 7, the plastic package motor further includes: the front damping ring 8 is sleeved on the outer side of the bearing seat 14, and/or the rear damping ring 9 is sleeved on the outer side of the rear end cover 7. Preferably, the internal perisporium of preceding damper ring 8 is provided with spacing recess, and further, the quantity and the position of spacing recess correspond with the spacing muscle of second on bearing frame 14, and second strengthening rib 141 imbeds spacing recess in the time of preceding damper ring 8 suit on bearing frame 14, can be spacing preceding damper ring 8 in circumference. Further, similar limit structures may be provided on the outer peripheral wall of the rear end cap 7 and the inner peripheral wall of the rear cushion ring 9.

The utility model has the advantages that each part comprises an injection molding shell 1, a circuit board 22 (strong and weak current common board), a wire outgoing clamp 23, a power wire and a winding stator 21 to form an integrated structure, wherein the injection molding shell 1 is provided with a plurality of functional structures such as a bearing seat 14, a magnetic ring cavity 15 chamber, a stator cavity chamber, a reinforcing rib, a diversion trench and the like, each functional structure is formed by one-time injection molding, compared with the traditional plastic packaging PG motor, two procedures of Hall circuit board assembly and end cover press mounting are reduced, and the labor cost is reduced.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (11)

1. An injection molded stator, comprising:

the stator assembly comprises a wound stator and a circuit board electrically connected with the wound stator;

the injection molding shell is internally provided with a stator cavity, the stator assembly is positioned in the stator cavity,

the stator assembly and the injection molding shell form an integral injection molding structure.

2. The injection molded stator of claim 1 wherein the injection molded housing comprises a side peripheral wall and a first bottom wall and a second bottom wall formed at both ends of the side peripheral wall,

the first bottom wall is formed with a rotor mounting hole for mounting a rotor into the wound stator,

the bearing seat is formed by protruding outwards along the axial direction of the second bottom wall, a magnetic ring cavity is formed between the bearing seat and the stator cavity, and the magnetic ring cavity is communicated with the stator cavity and the bearing seat.

3. The injection-molded stator according to claim 2, wherein the second bottom wall has first ribs on an outer side surface thereof, and a groove is formed between two adjacent first ribs, and the groove is inclined from the bearing holder to an edge of the second bottom wall.

4. An injection-molded stator according to claim 2, wherein a second reinforcing rib is provided on the outer peripheral wall of the bearing housing, and the second reinforcing rib is provided in plurality in parallel with the axis of the bearing housing and in the circumferential direction of the bearing housing.

5. An injection moulded stator according to claim 2 wherein the end of the bearing housing is provided with a sealing arrangement forming an annular raised formation along the circumference of the bearing housing,

the inner peripheral wall of the seal structure is a tapered surface formed by tapering in a direction toward the bearing seat.

6. The injection molded stator of any of claims 2-5, wherein the stator assembly further comprises an outlet clip, a portion of the outlet clip being integrally injection molded within the injection molded housing,

and the circuit of the circuit board penetrates out through the wire outgoing clamp.

7. An injection molded stator according to claim 6 wherein said circuit board is integrally injection molded within said injection molded housing,

and the circuit board is provided with a Hall circuit and a Hall element.

8. A plastic encapsulated motor, characterized in that it comprises an injection molded stator according to any of claims 1 to 7.

9. A plastic package motor, characterized in that, comprises the injection molding stator of any one of claims 2 to 7,

the plastic package motor also comprises a rotor component, the rotor component comprises a rotor and a motor shaft which is arranged on the rotor in a penetrating way,

the motor shaft is also provided with a front end bearing, a rear end bearing and a magnetic ring, the front end bearing and the rear end bearing are respectively arranged on two sides of the rotor, and the magnetic ring is positioned between the front end bearing and the rotor;

the rotor is rotatably arranged on the inner side of the winding stator, the front end bearing is fixedly arranged in the bearing seat, and the magnetic ring is positioned in the magnetic ring cavity;

the plastic package motor further comprises a rear end cover, the rear end cover covers the rotor mounting hole, and a rear end bearing is fixedly arranged in the rear end cover.

10. The plastic package motor of claim 9, wherein a protective cover is further disposed on the motor shaft, and the protective cover covers an end of the bearing seat.

11. A plastic package motor according to claim 10, further comprising:

the front damping ring is sleeved on the outer side of the bearing block; and/or the presence of a gas in the gas,

and the rear damping ring is sleeved on the outer side of the rear end cover.

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