Injection-molded stator assembly containing front or rear end cover and process thereof

Abstract

The invention is applicable to the technical field of motor manufacturing, and provides an injection-molded stator assembly containing a front end cover or a rear end cover and a process thereof, the injection-molded stator assembly comprises an integrated front end cover or an integrated rear end cover, a stator core and a stator winding are arranged in the integrated front end cover or the integrated rear end cover, and the integrated front end cover or the integrated rear end cover is formed by adopting a plastic material; wherein the stator winding is arranged in an assembling groove of the stator iron core, and when the stator winding is electrified, a variable magnetic field can be generated to interact with the stator iron core, so that the magnetic flux in the stator iron core is changed. The injection-molded stator assembly containing the front end cover or the rear end cover and the process thereof provided by the scheme have the conventional food stir-frying function and food frying function at the same time, and particularly can avoid the situation that the shape of food is easily damaged due to turning over in the frying process.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor manufacturing, and in particular relates to an injection-molded stator assembly including a front or rear end cover and a process thereof. Background Art

[0002] In the field of electric motor manufacturing, a stator assembly generally includes a stator core and windings, as well as a front cover and / or a rear cover.

[0003] Traditionally, the front and rear covers are usually made of metal materials and connected to the stator core and windings through fasteners such as screws after manufacturing. However, this late connection method not only complicates the manufacturing process, but also has a less compact structure, is usually larger in size than similar types, has poor sealing after assembly, and has a higher cost of use. Summary of the Invention

[0004] The present invention provides an injection-molded stator assembly including front or rear end covers and a process thereof, aiming to solve the problems that the current motor end covers are connected to the stator core and windings after production, resulting in an insufficiently compact overall structure, complex operation, and poor sealing.

[0005] The present invention is achieved as follows: an injection-molded stator assembly with a front or rear end cover includes: an integrated front end cover or an integrated rear end cover, wherein a stator core and a stator winding are disposed within the integrated front end cover or the integrated rear end cover, and the integrated front end cover or the integrated rear end cover is formed of a plastic material; wherein the stator winding is disposed within an assembly slot of the stator core, and when the stator winding is energized, a changing magnetic field is generated that interacts with the stator core, causing the magnetic flux in the stator core to change.

[0006] Preferably, the stator core is composed of a plurality of silicon steel sheets for generating and conducting a magnetic field, and the stator winding is a coil composed of a conductive wire and is placed in an assembly slot of the stator core.

[0007] Preferably, the integrated front end cover or the integrated rear end cover is formed into one piece by injection molding of a plastic material and tightly covers the stator core and the stator winding. The molded integrated front end cover or the integrated rear end cover fixes the extended part of the wire of the stator winding.

[0008] Preferably, the plastic material is thermosetting engineering plastic.

[0009] Preferably, the thermosetting engineering plastic is one or a combination of bulk molding compound (BMC), saturated polyester resin (UPR), epoxy resin (EP), silicone resin (SiR), polyurethane (PU), aminoplast (AMoY), and alkyd plastic (Alkyd).

[0010] Preferably, an assembly opening for installing the rotor is formed in the integrated front end cover or the integrated rear end cover and the stator core, and the assembly opening has a notch for installing a seal.

[0011] Preferably, the other three surfaces of the stator core except the inner ring surface are covered by the integrated front end cover or the integrated rear end cover.

[0012] Preferably, any one side and / or both sides of the integrated front end cover or the integrated rear end cover are provided with fastening notches for assembling accessories, and any one side and / or both sides of the integrated front end cover or the integrated rear end cover are planar structures and / or stepped structures.

[0013] The present invention also includes a manufacturing process for the above-mentioned injection-molded stator assembly including the front or rear end cover, comprising the following steps:

[0014] S1. Assemble the stator core and stator winding according to the process and place them in the mold;

[0015] S2, injecting plastic material for injection molding;

[0016] S3. Cooling, taking out the stator assembly, and trimming the formed stator assembly.

[0017] Preferably, during the injection molding process, the plastic material surrounds the stator core and the stator winding and forms an integrated front end cover or an integrated rear end cover.

[0018] Compared with related technologies, the injection-molded stator assembly with front or rear end covers and the process thereof provided by the present invention have the following beneficial effects:

[0019] Compared with the existing technology, the injection molding stator assembly with front or rear end cover and the process thereof provided by this solution have the following advantages:

[0020] 1. One-step injection molding, compact structure, small size, simple motor assembly, low cost and excellent performance;

[0021] 2. The stator winding gap is densely filled, and the winding heat dissipation is good, which is conducive to reducing temperature rise and improving efficiency;

[0022] 3. Injection molding makes the stator core stack more compact, the motor has less vibration and low noise;

[0023] 4. The one-step injection molding winding has high insulation strength, which is beneficial to extend the life of the motor;

[0024] 5. BMC is the preferred thermosetting molding material. As a good insulating material, BMC can eliminate the shaft current caused by the magnetic field asymmetry that is difficult to overcome in the motor, eliminate the electrical corrosion caused by the shaft current on the bearing, and greatly extend the service life of the bearing;

[0025] 6. The injection molded stator assembly has excellent sealing, making it easy to make a high waterproof grade motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the main cross-sectional structure of an injection-molded front end cover stator assembly provided by the present invention;

[0027] Figure 2 This is a left-side perspective structural diagram of an injection-molded front end cover provided by the present invention;

[0028] Figure 3 This is a right-side perspective structural diagram of an injection-molded front end cover provided by the present invention;

[0029] Figure 4 This is a schematic diagram of the main cross-sectional structure of an injection-molded rear end cover stator assembly provided by the present invention;

[0030] Figure 5 This is a left-side perspective structural diagram of an injection-molded rear end cover provided by the present invention;

[0031] Figure 6 It is a right-side stereoscopic structural schematic diagram of an injection-molded rear end cover provided by the present invention.

[0032] Reference numerals: 1. integrated front end cover; 2. integrated rear end cover; 3. stator core; 4. stator winding. DETAILED DESCRIPTION

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0034] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] The embodiment of the present invention provides a stator assembly including a front or rear end cover and a process thereof for injection molding, such as Figure 1-6As shown, the injection-molded stator assembly with a front or rear end cover includes: an integrated front end cover 1 or an integrated rear end cover 2, wherein a stator core 3 and a stator winding 4 are provided in the integrated front end cover 1 or the integrated rear end cover 2, and the integrated front end cover 1 or the integrated rear end cover 2 is formed of a plastic material; wherein the stator winding 4 is placed in an assembly groove of the stator core 3, and when the stator winding 4 is energized, a changing magnetic field can be generated to interact with the stator core 3, causing the magnetic flux in the stator core to change, and this changing magnetic flux will further generate an induced current in the stator winding 4, and this induced current interacts with the original current to generate an enhanced magnetic field. This process is continuously repeated, causing the rotor of the motor to rotate.

[0036] In this embodiment, injection molding the stator assembly including the front or rear end cover has the following advantages:

[0037] 1. Through one-time injection molding, a stator assembly with compact structure, small size, simple assembly, low cost and excellent performance can be obtained;

[0038] 2. The stator winding 4 is placed in the assembly slot of the stator core 3. When the stator winding 4 is energized, it can generate a changing magnetic field that interacts with the stator core 3, causing the magnetic flux in the stator core 3 to change. This changing magnetic flux will further generate an induced current in the stator winding 4. This induced current interacts with the original current to generate an enhanced magnetic field. This process is repeated continuously, causing the motor rotor to rotate. This method can improve the efficiency of the motor, reduce temperature rise, and enhance the performance and life of the motor.

[0039] 3. The integrated front cover 1 or the integrated rear cover 2 is formed of a plastic material, which can obtain good insulation effect and high temperature resistance, which is beneficial to extend the life of the motor;

[0040] 4. One-time injection molding can obtain a stator component with a smooth and beautiful appearance, and at the same time, a stator component with good sealing performance can be obtained, which is conducive to the production of motors with high waterproof grades;

[0041] 5. The stator winding gap is densely filled, the winding heat dissipation is good, which is conducive to reducing the temperature rise. The reasons are as follows:

[0042] Filling the stator winding gaps tightly can effectively reduce air circulation, thereby reducing the efficiency of heat convection and heat conduction. In this way, even if heat is generated during motor operation, it can be effectively limited to a certain range to avoid excessive heat accumulation;

[0043] Good winding heat dissipation performance can further help reduce the temperature. The stator winding is usually made of copper wire or aluminum wire. These materials have good thermal conductivity. When the winding generates heat, the heat can be conducted to the surrounding air through the copper or aluminum wire, thereby reducing the temperature of the winding.

[0044] Combining the above two points, densely filled stator winding gaps and good winding heat dissipation performance can effectively reduce the temperature of the motor, thereby improving the efficiency and life of the motor.

[0045] In summary, the injection-molded stator assembly with the front or rear end cover of this embodiment has multiple advantages, can meet the requirements of different motors, and is an ideal motor manufacturing method.

[0046] In a further preferred embodiment of the present invention, the stator core 3 is composed of multiple silicon steel sheets for generating and conducting a magnetic field, and the stator winding 4 is a coil composed of conductive wires and is placed in an assembly slot of the stator core 3 .

[0047] In this embodiment, as described above, the stator core 3 is composed of multiple silicon steel sheets, which are used to generate and conduct the magnetic field. The silicon steel sheets are excellent magnetic conductive materials and can form a strong magnetic field. This magnetic field can be enhanced and controlled by the current generated by the stator winding 4.

[0048] The stator winding 4 is a coil of wire placed in the assembly slot of the stator core 3. When energized, these coils generate their own magnetic field, which interacts with the magnetic field of the stator core 3 to drive the motor's rotor to rotate.

[0049] This design method is beneficial to improving the efficiency and life of the motor;

[0050] First, due to the close fit between the stator core 3 and the stator winding 4, the motor can rotate more smoothly, reducing vibration and noise;

[0051] Secondly, due to the high magnetic conductivity of the silicon steel sheet and the good heat dissipation performance of the stator winding 4, the heat generated by the motor during operation can be effectively dissipated, avoiding the impact of overheating on the motor performance;

[0052] Finally, due to the strong combination of the stator core 3 and the stator winding 4, the durability of the motor can be improved and its service life can be extended.

[0053] In a further preferred embodiment of the present invention, the integrated front end cover 1 or the integrated rear end cover 2 is injection molded into one piece with a plastic material and tightly covers the stator core 3 and the stator winding 4. The molded integrated front end cover 1 or the integrated rear end cover 2 fixes the extended part of the wire of the stator winding 4.

[0054] In this embodiment, the integrated front cover 1 or the integrated rear cover 2 is integrally formed by injection molding of a plastic material to tightly cover the stator core 3 and the stator winding 4. This injection molding method can provide a fast and efficient production method, while also providing protection for the stator core 3 and the stator winding 4, preventing them from mechanical damage or environmental influences during operation of the motor.

[0055] The formed integrated front end cover 1 or integrated rear end cover 2 fixes the extended portion of the stator winding 4. This fixing method can ensure the stable position of the stator winding 4, preventing it from loosening or shifting during the operation of the motor, which would affect the performance and life of the motor. At the same time, this fixing method can also improve the vibration and noise resistance of the motor, making the motor run more smoothly.

[0056] In general, this embodiment improves the production efficiency, protection effect, performance and life of the motor through injection molding of plastic materials and fixation of stator winding wires.

[0057] In a further preferred embodiment of the present invention, the plastic material is thermosetting engineering plastic.

[0058] In this embodiment, the thermosetting engineering plastic has excellent electrical insulation properties, high temperature resistance and mechanical properties, and is therefore suitable for use in manufacturing motor components;

[0059] By using thermosetting engineering plastics as the plastic material, the following beneficial effects can be achieved:

[0060] Excellent electrical insulation properties: Thermosetting engineering plastics have high insulation resistance and low dielectric constant, which can effectively prevent electrical breakdown and electrochemical corrosion, ensuring the safe operation of the motor.

[0061] High temperature resistance: Thermosetting engineering plastics can maintain the stability of their physical and mechanical properties at high temperatures, allowing the motor to operate stably for a long time in high temperature environments.

[0062] Good mechanical properties: Thermosetting engineering plastics have high tensile strength, flexural strength and impact toughness, which can withstand the vibration and impact during motor operation and ensure the service life of the motor.

[0063] Easy to process and shape: Thermosetting engineering plastics can be processed and shaped by injection molding, extrusion, etc., with high production efficiency and suitable for large-scale production.

[0064] In summary, the use of thermosetting engineering plastics as plastic materials can obtain motor components with excellent performance and improve the efficiency and life of the motor.

[0065] In a further preferred embodiment of the present invention, the thermosetting engineering plastic is one or a combination of bulk molding compound (BMC), saturated polyester resin (UPR), epoxy resin (EP), silicone resin (SiR), polyurethane (PU), aminoplast (AMoY), and alkyd plastic (Alkyd).

[0066] In this embodiment, the thermosetting engineering plastic is preferably bulk molding compound (BMC). BMC is a molded intermediate material for manufacturing glass fiber reinforced thermosetting products by a semi-dry process. It has high tensile strength, flexural strength and impact toughness, can withstand vibration and impact during motor operation, is a good insulating material, can eliminate the shaft current caused by the magnetic field asymmetry that is difficult to overcome in the motor, eliminates the electrical corrosion of the bearing caused by the shaft current, and greatly extends the service life of the bearing.

[0067] In other embodiments, the thermosetting engineering plastic may also be made of other single materials, such as the following:

[0068] Saturated polyester resin (UPR): UPR is a strong and impact-resistant thermosetting engineering plastic with high tensile strength, flexural strength and impact toughness. UPR also has excellent chemical and oil resistance and is suitable for manufacturing motor components used in chemical and oil environments.

[0069] Epoxy resin (EP): EP has high heat resistance, electrical insulation and mechanical strength, and is suitable for manufacturing motor components used under high temperature, high pressure and high frequency. EP also has good adhesion and corrosion resistance, and can be firmly bonded to metal, glass, ceramics and other materials.

[0070] Silicone resin (SiR): SiR has excellent heat resistance and cold resistance, and can maintain the stability of its physical and mechanical properties in high and low temperature environments. SiR also has excellent electrical insulation properties and chemical resistance, and is suitable for manufacturing motor components used in harsh environments such as high temperature, high humidity, and chemicals.

[0071] Polyurethane (PU): PU has excellent wear resistance and elasticity and can effectively absorb vibration and impact. PU also has good oil resistance and chemical resistance and is suitable for manufacturing motor components used in environments such as oil and chemicals.

[0072] Aminoplast (AMoY): AMoY has high heat resistance and electrical insulation properties, making it suitable for manufacturing motor components used under high temperature, high pressure, and high frequency conditions. AMoY also has good mechanical strength and wear resistance, and can withstand vibration and impact during motor operation.

[0073] Alkyd plastic (Alkyd): Alkyd has excellent oil and chemical resistance and is suitable for manufacturing motor components used in environments such as oil and chemicals. Alkyd also has good mechanical strength and wear resistance and can withstand vibration and impact during motor operation.

[0074] In summary, selecting suitable thermosetting engineering plastics or combining multiple materials according to specific needs can produce motor components with excellent performance.

[0075] In addition to the above implementation methods, this solution uses the following methods when selecting several materials to make the motor housing:

[0076] In the above embodiments, one or more of bulk molding compound (BMC), saturated polyester resin (UPR), epoxy resin (EP), silicone resin (SiR), polyurethane (PU), aminoplast (AMoY), and alkyd plastic (Alkyd) have been mentioned as materials. The synthesis steps, methods, and proportions of the various materials will be described in detail below.

[0077] First of all, the material suitable for producing motor housing should have the following properties:

[0078] Good electrical insulation properties to prevent electrical breakdown and electrochemical corrosion;

[0079] High heat resistance and cold resistance to adapt to temperature changes during motor operation;

[0080] Excellent mechanical strength and impact toughness to withstand vibration and impact during motor operation;

[0081] Good chemical resistance and oil resistance to adapt to use in various environments.

[0082] According to the above performance requirements, we can choose the following materials for mixing:

[0083] Bulk molding compound (BMC): It has high mechanical strength, impact toughness and electrical insulation properties and can be used as one of the main materials.

[0084] Saturated polyester resin (UPR): has high heat resistance and electrical insulation properties, and can be used in combination with BMC to improve the heat resistance of the material.

[0085] Epoxy resin (EP): has high heat resistance and electrical insulation properties and can be used in combination with BMC to improve the heat resistance of the material.

[0086] Silicone resin (SiR): has excellent heat resistance and electrical insulation properties and can be used in combination with BMC to improve the heat resistance of the material.

[0087] Polyurethane (PU): has excellent wear resistance and elasticity, and can be used in combination with BMC to improve the impact toughness of the material.

[0088] Aminoplast (AMoY): It has high heat resistance and electrical insulation properties and can be used in combination with BMC to improve the heat resistance of the material.

[0089] Alkyd plastic: It has excellent oil resistance and chemical resistance and can be used in combination with BMC to improve the material's chemical resistance.

[0090] Here is a possible deployment plan:

[0091] Mixing bulk molding compound (BMC) and polyurethane (PU) in a mass ratio of 6-10:1.5-3;

[0092] The mixed raw materials are added to the extruder and heated to melt;

[0093] The molten raw material is extruded through a die and cooled and solidified to obtain a new material;

[0094] The new material is injection molded into the shape of the motor housing.

[0095] The advantages of this new material are:

[0096] It has good electrical insulation properties and can effectively prevent electrical breakdown and electrochemical corrosion;

[0097] It has high heat resistance and cold resistance and can adapt to temperature changes during motor operation;

[0098] It has excellent mechanical strength and impact toughness and can withstand vibration and impact during motor operation;

[0099] It has good chemical resistance and oil resistance and can adapt to use in various environments.

[0100] In addition, this new material has high production efficiency, low production cost, and is easy to process and shape, making it suitable for large-scale production. At the same time, due to the use of a combination of multiple materials, various excellent performance combinations can be obtained to meet the needs of different types of motors.

[0101] In addition to the above methods, the various materials listed in this plan can be used in combination.

[0102] In a further preferred embodiment of the present invention, an assembly opening for installing the rotor is formed in the integrated front end cover 1 or the integrated rear end cover 2 and the stator core 3, and the assembly opening has a notch for installing a seal.

[0103] In this embodiment, this design facilitates installation and removal of the rotor, and also improves the sealing performance of the motor, preventing pollutants such as dust and moisture from entering the motor, thereby extending the service life of the motor.

[0104] By providing the assembly opening and the corresponding notch, the rotor can be easily installed on or removed from the stator core 3;

[0105] At the same time, the groove of the assembly port can be used to install seals, such as O-rings or lip seals, to further improve the sealing performance of the motor. This can effectively protect the components inside the motor from damage such as pollution and wear while ensuring the normal operation of the motor, thereby improving the reliability and service life of the motor.

[0106] In a further preferred embodiment of the present invention, the three surfaces of the stator core 3 except the inner ring surface are covered by the integrated front end cover 1 or the integrated rear end cover 2 .

[0107] In this embodiment, this design can further improve the protection capability of the motor and protect the stator core 3 from external mechanical damage or environmental factors;

[0108] Since the integrated front end cover 1 or the integrated rear end cover 2 covers three sides of the stator core 3, the stator core 3 can be effectively protected from external mechanical damage such as impact and collision.

[0109] At the same time, since the integrated front end cover 1 or the integrated rear end cover 2 also fixes the stator winding 4, the winding can be further protected from vibration and mechanical damage;

[0110] In addition, since the integrated front end cover 1 or the integrated rear end cover 2 also has the function of preventing pollutants such as dust and moisture from entering the interior of the motor, it can further protect the components inside the motor from damage such as pollution and corrosion, thereby improving the reliability and service life of the motor.

[0111] In a further preferred embodiment of the present invention, any side and / or both sides of the integrated front end cover 1 or the integrated rear end cover 2 are provided with fastening notches for assembling accessories, and any side and / or both sides of the integrated front end cover 1 or the integrated rear end cover 2 are planar structures and / or stepped structures.

[0112] In this embodiment, this design method can further improve the assembly efficiency and convenience of the motor, and at the same time can adjust the structure and assembly method of the motor as needed.

[0113] By providing fastening notches for assembling accessories, accessories such as the stator core 3 and the stator winding 4 can be easily assembled into the motor. At the same time, the various components can be fastened and fixed during the operation of the motor. This design can shorten the assembly time of the motor and improve production efficiency.

[0114] In addition, the design of any one side and / or both sides of the integrated front end cover 1 or the integrated rear end cover 2 as a planar structure and / or a stepped surface structure can adjust the structural form and assembly method of the motor as needed. For example, if the heat dissipation performance of the motor needs to be increased, one side can be designed as a planar structure to increase the heat dissipation area; if the sealing performance of the motor needs to be improved, both sides can be designed as a stepped surface structure to increase the sealing effect. This design method provides greater flexibility for the structural design and performance optimization of the motor.

[0115] The present invention also includes a manufacturing process for the above-mentioned injection-molded stator assembly including the front or rear end cover, comprising the following steps:

[0116] S1, assemble the stator core 3 and the stator winding 4 according to the process and place them in the mold;

[0117] S2, injecting plastic material for injection molding;

[0118] S3. Cooling, taking out the stator assembly, and trimming the formed stator assembly.

[0119] In this embodiment, the present invention also includes the above-mentioned injection molding manufacturing process of the stator assembly including the front or rear end cover, which enables efficient manufacture of a motor with excellent performance;

[0120] In step S1, the stator core 3 and the stator winding 4 are assembled according to the process and placed in a mold. This is a key step in motor manufacturing, which ensures that the main parts of the motor are correctly assembled together;

[0121] In step S2, a plastic material is injected for injection molding. This step utilizes a mold and thermoplastic material to encapsulate the stator assembly in the plastic material, thereby forming a stable and protective structure.

[0122] In step S3, the stator assembly is cooled and removed, and trimmed to achieve its final shape and size.

[0123] In a further preferred embodiment of the present invention, during the injection molding process, the plastic material surrounds the stator core 3 and the stator winding 4 and forms an integrated front end cover 1 or an integrated rear end cover 2 .

[0124] In this embodiment, during the injection molding process, the plastic material surrounds the stator core 3 and the stator winding 4 and forms an integrated front cover 1 or an integrated rear cover 2. In this way, the stator assembly is fully protected during the injection molding process, effectively preventing the components inside the motor from being damaged by the external environment.

[0125] This manufacturing process not only efficiently produces stator components, but also improves product quality, reduces production costs, and improves product durability and reliability through injection molding.

[0126] In summary, compared with the related art, the present invention has the following advantages:

[0127] 1. One-step injection molding, compact structure, small size, simple motor assembly, low cost and excellent performance;

[0128] 2. The stator winding gap is densely filled, and the winding heat dissipation is good, which is conducive to reducing temperature rise and improving efficiency;

[0129] 3. Injection molding makes the stator core stack more compact, the motor has less vibration and low noise;

[0130] 4. The one-step injection molding winding has high insulation strength, which is beneficial to extend the life of the motor;

[0131] 5. BMC is the preferred thermosetting molding material. As a good insulating material, BMC can eliminate the shaft current caused by the magnetic field asymmetry that is difficult to overcome in the motor, eliminate the electrical corrosion caused by the shaft current on the bearing, and greatly extend the service life of the bearing;

[0132] 6. The injection molded stator assembly has excellent sealing, making it easy to make a high waterproof grade motor.

[0133] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative.

[0134] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope of protection of the present invention.

Claims

1. An injection molded stator assembly with a front or rear end cover, characterized in that: include: An integrated front end cover (1) or an integrated rear end cover (2), wherein a stator core (3) and a stator winding (4) are provided in the integrated front end cover (1) or the integrated rear end cover (2), and the integrated front end cover (1) or the integrated rear end cover (2) is formed of a plastic material; The stator winding (4) is placed in the assembly slot of the stator core (3). When the stator winding (4) is energized, it can generate a changing magnetic field that interacts with the stator core (3), causing the magnetic flux in the stator core to change.

2. The injection molded stator assembly with front or rear end cover according to claim 1, characterized in that: The stator core (3) is composed of a plurality of silicon steel sheets and is used to generate and conduct a magnetic field. The stator winding (4) is a coil composed of conductive wires and is placed in an assembly slot of the stator core (3).

3. The injection molded stator assembly with front or rear end cover according to claim 1, characterized in that: The integrated front end cover (1) or the integrated rear end cover (2) is formed into one piece by injection molding of a plastic material and then tightly covers the stator core (3) and the stator winding (4); the molded integrated front end cover (1) or the integrated rear end cover (2) fixes the extended portion of the wire of the stator winding (4).

4. The injection molded stator assembly with front or rear end cover according to claim 2, characterized in that: The plastic material is thermosetting engineering plastic.

5. The injection molded stator assembly with front or rear end cover according to claim 4, characterized in that: The thermosetting engineering plastic is one or a combination of bulk molding compound (BMC), saturated polyester resin (UPR), epoxy resin (EP), silicone resin (SiR), polyurethane (PU), aminoplast (AMoY), and alkyd plastic (Alkyd).

6. The injection molded stator assembly with front or rear end cover according to claim 1, characterized in that: An assembly opening for installing the rotor is formed in the integrated front end cover (1) or the integrated rear end cover (2) and the stator core (3), and the assembly opening has a notch for installing a sealing member.

7. The injection molded stator assembly with front or rear end cover according to claim 1, characterized in that: The three surfaces of the stator core (3) except the inner ring surface are all covered by the integrated front end cover (1) or the integrated rear end cover (2).

8. The injection molded stator assembly with front or rear end cover according to claim 1, characterized in that: Any one side and / or both sides of the integrated front end cover (1) or the integrated rear end cover (2) are provided with fastening notches for assembling accessories, and any one side and / or both sides of the integrated front end cover (1) or the integrated rear end cover (2) are in a planar structure and / or a stepped surface structure.

9. The manufacturing process of the injection-molded stator assembly including the front or rear end cover according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, assembling the stator core (3) and the stator winding (4) according to the process and placing them in a mold; S2, injecting plastic material for injection molding; S3. Cooling, taking out the stator assembly, and trimming the formed stator assembly.

10. The manufacturing process of the injection-molded stator assembly including the front or rear end cover according to claim 9, characterized in that: During the injection molding process, the plastic material surrounds the stator core (3) and the stator winding (4) and forms an integrated front end cover (1) or an integrated rear end cover (2).

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