CN216599368U

CN216599368U - Three-armature motor

Info

Publication number: CN216599368U
Application number: CN202123189168.6U
Authority: CN
Inventors: 陈晓森; 蔡易霖; 张家旺
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-05-24
Anticipated expiration: 2031-12-17

Abstract

The utility model provides a three-armature motor which comprises a stator assembly and a rotor assembly, wherein the stator assembly comprises an outer stator iron core and an inner stator iron core, the rotor assembly comprises a rotating shaft and a magnetic ring, the magnetic ring comprises an inner magnetic ring and an outer magnetic ring which are connected into a whole, the magnetic ring is sleeved in a magnetic conduction shell, a first armature is formed between the outer circumference side of the outer stator iron core and the outer magnetic ring, the inner magnetic ring is positioned in a gap formed between the outer stator iron core and the inner stator iron core, a second armature is formed between the inner circumference side of the outer stator iron core and the inner magnetic ring, and a third armature is formed between the outer circumference side of the inner stator iron core and the inner magnetic ring. According to the utility model, the inner ring surface and the outer ring surface of the inner magnetic ring are utilized by the outer stator iron core and the inner stator iron core, so that the utilization area of the permanent magnetic material is increased, the efficiency and the power density of the motor are improved, meanwhile, as the inner magnetic ring and the outer magnetic ring are connected into a whole, the three armatures simultaneously provide magnetic field force for the rotor, and the torque output of the motor is greatly improved.

Description

Three-armature motor

Technical Field

The utility model belongs to the technical field of motor manufacturing, and particularly relates to a three-armature motor.

Background

At present, a permanent magnet motor generally consists of a stator and a rotor, namely, the permanent magnet motor is driven by a single armature, for a surface-mounted magnetic shoe or a magnetic ring rotor, only the outer circular surface of a permanent magnet material is utilized by the stator, and the service area of the permanent magnet material is low, so that the efficiency and the power density of the motor are limited; moreover, it is difficult for the single-armature driving motor to satisfy the requirements of low-speed large torque and high-speed operation capability at the same time, and in order to achieve large torque output, the size of the motor is generally increased to increase the electromagnetic force, which increases the cost and the requirement of the motor on the installation space.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a three-armature motor, which can overcome the contradiction between the output torque of the motor and the volume of the motor in the related technology, namely the motor with larger output torque has larger volume, and the output torque is smaller when the motor has smaller volume.

In order to solve the above problems, the present invention provides a three-armature motor, including a stator assembly and a rotor assembly, wherein the stator assembly includes an outer stator core and an inner stator core, the rotor assembly includes a rotating shaft and a magnetic ring, the magnetic ring includes an inner magnetic ring and an outer magnetic ring connected as a whole, the magnetic ring is sleeved in a magnetic conductive housing, a first armature is formed between an outer circumference side of the outer stator core and the outer magnetic ring, the inner magnetic ring is located in a gap formed between the outer stator core and the inner stator core, a second armature is formed between an inner circumference side of the outer stator core and the inner magnetic ring, and a third armature is formed between the outer circumference side of the inner stator core and the inner magnetic ring.

In some embodiments, the magnetic conductive shell and the magnetic ring are in an interference fit, and the magnetic conductive shell and the rotating shaft are in an interference fit.

In some embodiments, the magnetic conductive shell and the rotating shaft are in interference fit through a through hole, the axial length of the fit between the hole wall of the through hole and the rotating shaft is L, the diameter of the interference fit position of the rotating shaft and the through hole is D, and L is greater than or equal to D/2.

In some embodiments, a connection ring is arranged between the inner magnetic ring and the outer magnetic ring, and a concave-convex connection structure is arranged at the matching connection position of the connection ring and the magnetic conductive shell.

In some embodiments, the connection ring is configured with a first guide hole, and the mating connection of the magnetically permeable housing and the connection ring is also configured with a second guide hole, the first guide hole corresponding to the position of the second guide hole.

In some embodiments, the first stator teeth having a tooth length on the outer circumferential side of the outer stator core is shorter than the second stator teeth having a tooth length on the inner circumferential wall of the outer stator core; and/or the tooth length of the third stator tooth arranged on the outer circumferential wall of the inner stator core is longer than the tooth length of the second stator tooth arranged on the inner circumferential wall of the outer stator core.

In some embodiments, the outer stator core is wrapped with an outer skeleton, the inner stator core is wrapped with an inner skeleton, and the outer skeleton and the inner skeleton are made of one of nylon PA66, PBT or PET.

In some embodiments, the two axial end faces of the outer stator core wrapped around the outer frame and the two axial end faces of the inner stator core wrapped around the inner frame are connected into a whole through injection molding.

In some embodiments, the material of the injection molded part is a bulk molding compound.

In some embodiments, one axial end surface of the outer stator core has a first region that is not covered by the injection molded part, one axial end surface of the inner stator core has a second region that is not covered by the injection molded part, and the first region and the second region are on the same side of the stator assembly.

According to the three-armature motor provided by the utility model, the inner ring surface and the outer ring surface of the inner magnetic ring are utilized by the outer stator iron core and the inner stator iron core, so that the utilization area of a permanent magnetic material is increased, the efficiency and the power density of the motor are improved, meanwhile, as the inner magnetic ring and the outer magnetic ring are connected into a whole, the three armatures simultaneously provide magnetic field force for the rotor, and the torque output of the motor is greatly improved.

Drawings

Fig. 1 is an external structural view of a three-armature motor according to an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of FIG. 1;

fig. 3 is an assembly schematic view (axial projection) of the magnetic conductive housing, the magnetic ring, the outer stator core and the inner stator core in fig. 1;

fig. 4 is an exploded view of the three armature motor of fig. 1;

FIG. 5 is an exploded view of the stator assembly of FIG. 1;

fig. 6 is an exploded view of the magnetic ring and the magnetic conductive housing in fig. 1;

fig. 7 is an assembly diagram of the magnetic ring and the magnetic conductive housing in fig. 1.

The reference numerals are represented as:

1. a magnetically conductive housing; 1a, a groove; 2. a magnetic ring; 2a, an inner magnetic ring; 2b, an external magnetic ring; 2c, a first guide hole; 2d, a bulge; 3. a stator assembly; 3a, an outer stator core; 3b, an inner stator iron core; 3c, injection molding; 4. a rotating shaft; 5. a bearing; 6. an outer skeleton; 7. an inner skeleton; 8. and a wire passing structure.

Detailed Description

Referring to fig. 1 to 7 in combination, according to an embodiment of the present invention, there is provided a three-armature motor, including a stator assembly 3 and a rotor assembly, wherein, the stator assembly 3 comprises an outer stator core 3a and an inner stator core 3b, the rotor assembly comprises a rotating shaft 4 and a magnetic ring 2, the magnetic ring 2 comprises an inner magnetic ring 2a and an outer magnetic ring 2b which are connected into a whole, the magnetic ring 2 is sleeved in the magnetic conduction shell 1, a first armature is formed between the outer circumferential side of the outer stator core 3a and the outer magnetic ring 2b, the inner magnetic ring 2a is positioned in a gap formed between the outer stator core 3a and the inner stator core 3b, a second armature is formed between the inner circumferential side of the outer stator core 3a and the inner magnetic ring 2a, a third armature is formed between the inner ring 2a and the outer circumferential side of the inner stator core 3 b. In the technical scheme, the outer stator core 3b and the inner stator core 3a utilize the inner ring surface and the outer ring surface of the inner magnetic ring 2a, so that the utilization area of a permanent magnetic material is increased, the efficiency and the power density of the motor are improved, and meanwhile, as the inner magnetic ring 2a and the outer magnetic ring 2b are connected into a whole, the three armatures simultaneously provide magnetic field force for the rotor, and the torque output of the motor is greatly improved.

The magnetic conductive casing 1 is, for example, an iron shell, in some embodiments, the magnetic conductive casing 1 (in a specific embodiment, the iron shell) is in interference fit with the outer peripheral side of the outer magnetic ring 2b, the magnetic conductive casing 1 and the magnetic ring 2 are in interference fit, and the magnetic conductive casing 1 and the rotating shaft 4 are in interference fit, so that the magnetic conductive casing 1 can be used as both a magnetic circuit conduction medium of the magnetic ring 2, in particular, the outer magnetic ring 2b, and an output connection component for driving the motor to rotate. Furthermore, the magnetic conductive shell 1 and the rotating shaft 4 are in interference fit through a through hole, the axial length of the fit between the hole wall of the through hole and the rotating shaft 4 is L, the diameter of the interference fit position of the rotating shaft 4 and the through hole is D, and L is larger than or equal to D/2, so that the binding force between the magnetic conductive shell 1 and the rotating shaft 4 is ensured.

In some embodiments, a connection ring is arranged between the inner magnetic ring 2a and the outer magnetic ring 2b, and a concave-convex connection structure is arranged at a matching connection position of the connection ring and the magnetic conductive housing 1, so that a tangential bonding force between the magnetic ring 2 and the magnetic conductive housing 1 can be further increased, and the phenomenon that the magnetic ring 2 idles due to the reduction of interference caused by thermal expansion of the magnetic ring 2 and the magnetic conductive housing 1 when the motor is heated is effectively prevented. The concave-convex connection structure may be specifically a protrusion 2d disposed on the connection ring and a groove 1a disposed on the magnetic conductive housing 1, and in a preferred example, the inner magnetic ring 2a, the outer magnetic ring 2b and the connection ring connected therebetween are integrally formed by using the same material through a mold.

In order to facilitate the smooth alignment of the concave-convex connection structure between the magnetic ring 2 and the magnetic conductive housing 1, in some embodiments, the connection ring is configured with a first guide hole 2c, and the matching connection between the magnetic conductive housing 1 and the connection ring is also configured with a second guide hole (not shown in the figure), and the first guide hole 2c is adapted to the position of the second guide hole. Specifically, when the magnetic ring 2 and the magnetic conductive housing 1 are assembled, a pin is inserted into the first guide hole 2c and the second guide hole to position and guide the two.

In some embodiments, the tooth length of the first stator teeth provided on the outer circumferential side of the outer stator core 3a is shorter than the tooth length of the second stator teeth provided on the inner circumferential wall of the outer stator core 3 a; and/or, the tooth length of the third stator teeth provided on the outer circumferential wall of the inner stator core 3b is longer than the tooth length of the second stator teeth provided on the inner circumferential wall of the outer stator core 3a, which is advantageous in ensuring a larger slot area of each stator tooth portion.

In some embodiments, the outer stator core 3a is coated with an outer frame 6, the inner stator core 3b is coated with an inner frame 7, the material of the outer frame 6 and the inner frame 7 is one of nylon PA66, PBT or PET, and further, 10% to 30% of glass fiber can be properly added to enhance the frame strength. The outer framework 6 and the inner framework 7 mainly surround the iron core tooth part, a winding coil (not shown in the figure) is wound on the tooth part framework, and the framework separates the iron core from the coil to play an insulating role and prevent the coil from being leaked or scratched; the yoke framework is provided with the wire passing structure 8 which plays a role in guiding and fixing the lead, so that the coil is convenient to wind and the lead is prevented from being loosened and messy.

In some embodiments, the two axial end faces of the outer stator core 3a wrapped around the outer frame 6 and the two axial end faces of the inner stator core 3b wrapped around the inner frame 7 are connected into a whole through an injection molding piece 3c, and the injection molding piece 3c connects the outer stator core 3a and the inner stator core 3b into a whole, so that the assembly process of the motor can be simplified, and it can be understood that the injection molding piece 3c can also form a corresponding bearing chamber through injection molding, and then a corresponding bearing 5 is arranged in the bearing chamber to realize the connection between the rotating shaft 4 and the stator assembly. The injection molding piece 3c is made of Bulk Molding Compound (BMC) which is light in weight, low in price, high in strength, excellent in electrical performance, mechanical performance, heat resistance, chemical corrosion resistance and flame retardance, suitable for various molding processes and stable in product quality. It should be noted that the injection-molded part 3c in this solution is only located at the axial end of the stator core, and does not cover the teeth of the stator core, which can enhance the heat dissipation capability of the stator.

One axial end face of the outer stator core 3a has a first region, the first region is a region not covered by the injection molded part 3c, one axial end face of the inner stator core 3b has a second region, the second region is a region not covered by the injection molded part 3c, and the first region and the second region are on the same side of the stator assembly. The axial direction of the outer stator core 3a and the axial direction of the inner stator core 3b which are connected into a whole by injection molding can be positioned by reserving the first area and the second area. The first region and the second region are, for example, a ring exposure surface at an inner axial end of the outer stator core 3a and a ring exposure surface at an outer axial end of the inner stator core 3b, respectively, and a ring width of the ring exposure surface is not less than 0.5 mm.

The assembling process of the motor comprises the following steps: laminating an inner stator iron core 3b and an outer stator iron core 3 a; secondly, injection molding frameworks (namely the inner framework 7 and the outer framework 6) of the inner stator iron core 3b and the outer stator iron core 3 a; thirdly, winding; positioning the inner stator core 3b and the outer stator core 3a, and then injecting a plastic injection molding piece 3 c; fifthly, pressing the magnetic ring 2 into the magnetic conduction shell 1; sixthly, pressing a bearing at the shaft outlet end into the rotating shaft 4; seventhly, the rotating shaft 4 penetrates through the stator assembly, and a bearing at the shaft outlet end is arranged in a bearing chamber; pressing another bearing into the rotating shaft 4 and placing the bearing into a corresponding bearing chamber; and ninthly, pressing the magnetic conduction shell 1 into the rotating shaft 4.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A three-armature motor is characterized by comprising a stator assembly (3) and a rotor assembly, wherein the stator assembly (3) comprises an outer stator core (3a) and an inner stator core (3b), the rotor component comprises a rotating shaft (4) and a magnetic ring (2), the magnetic ring (2) comprises an inner magnetic ring (2a) and an outer magnetic ring (2b) which are connected into a whole, the magnetic ring (2) is sleeved in a magnetic conduction shell (1), a first armature is formed between the outer circumferential side of the outer stator core (3a) and the outer magnetic ring (2b), the inner magnetic ring (2a) is in a gap formed between the outer stator core (3a) and the inner stator core (3b), a second armature is formed between the inner circumferential side of the outer stator core (3a) and the inner magnetic ring (2a), a third armature is formed between the inner ring magnet (2a) and the outer circumferential side of the inner stator core (3 b).

2. A three-armature motor according to claim 1, wherein the magnetically conductive housing (1) is in interference fit with the magnet ring (2), and the magnetically conductive housing (1) is in interference fit with the rotating shaft (4).

3. The three-armature motor according to claim 2, wherein the magnetic conductive housing (1) and the rotating shaft (4) are in interference fit through a through hole, the axial length of the fit between the hole wall of the through hole and the rotating shaft (4) is L, the diameter of the interference fit position of the rotating shaft (4) and the through hole is D, and L is greater than or equal to D/2.

4. A three-armature motor according to claim 2, characterized in that a connecting ring is arranged between the inner magnetic ring (2a) and the outer magnetic ring (2b), and the matching connection position of the connecting ring and the magnetic conductive shell (1) is provided with a concave-convex connection structure.

5. A three armature machine according to claim 4, characterized in that the connection ring is configured with a first guide hole (2c), and the cooperating connection of the magnetically conductive housing (1) and the connection ring is also configured with a second guide hole, the first guide hole (2c) being adapted to the position of the second guide hole.

6. A three-armature motor according to claim 1, wherein the tooth length of the first stator teeth provided on the outer circumferential side of the outer stator core (3a) is shorter than the tooth length of the second stator teeth provided on the inner circumferential wall of the outer stator core (3 a); and/or the tooth length of the third stator teeth on the outer circumferential wall of the inner stator core (3b) is longer than the tooth length of the second stator teeth on the inner circumferential wall of the outer stator core (3 a).

7. A three-armature motor according to claim 6, wherein the outer stator core (3a) is over-molded with an outer bobbin (6), the inner stator core (3b) is over-molded with an inner bobbin (7), and the outer bobbin (6) and the inner bobbin (7) are made of one of nylon PA66, PBT or PET.

8. The three-armature motor according to claim 7, wherein both axial end faces of the outer stator core (3a) wrapped around the outer bobbin (6) and both axial end faces of the inner stator core (3b) wrapped around the inner bobbin (7) are connected as a single body by an injection molding (3 c).

9. A three-armature machine according to claim 8, characterized in that the material of the injection-molded part (3c) is bulk molding compound.

10. A three armature electrical machine according to claim 8, wherein one axial end face of the outer stator core (3a) has a first region which is a region not covered by the injection molded piece (3c), and one axial end face of the inner stator core (3b) has a second region which is a region not covered by the injection molded piece (3c), the first region being on the same side of the stator assembly as the second region.