Stator structure of external rotor motor

Abstract

The utility model relates to the technical field of motors, and discloses a stator structure of an external rotor motor, which comprises a protective shell, the left side and the right side of the inner wall of the protective shell are fixedly connected with a plurality of bearing seats, the inner wall of each bearing seat is provided with a connecting groove, and the inner wall of each connecting groove is clamped with a stator iron core. A plurality of stator windings are fixedly connected to the inner wall of the stator core, a ball bearing is fixedly connected to the inner wall of the middle of the bearing seat, a rotating shaft is fixedly connected to the inner wall of the ball bearing, a connecting column is fixedly connected to the middle of the outer wall of the rotating shaft, and a rotor core is fixedly connected to the outer wall of the connecting column. According to the utility model, the bearing seat and the stator core are in interference fit to eliminate a gap, accurate alignment is realized, the ball bearing is used for reducing resistance, the connecting column is used for connecting the rotor core, the rotor winding and the stator winding, the operation is good, additional processing is avoided, the cost is reduced, the environment is improved, the production efficiency and the product quality are improved, and the enterprise requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a stator structure of outer rotor motor. BACKGROUND

[0002] The outer rotor motor is a kind of motor type, and its rotor rotates outside the motor, while the stator is located inside the motor. The stator structure of the outer rotor motor is mainly composed of a stator core and a stator winding. The stator core is made of silicon steel sheets and provides a magnetic circuit for the motor. The stator winding generates a magnetic field through electric current, which interacts with the outer rotor to produce torque and drive the motor to operate. This stator structure is widely used in many fields and has the characteristics of compact structure, high power density and large torque.

[0003] In the design and manufacture of the outer rotor motor, in order to ensure the stability and efficiency of the motor operation, it is necessary to keep the outer circle of the stator core highly concentric with the bearing chamber. The main problem faced by the current industry is that a large amount of waste and environmental pollution will be generated in the process of achieving this goal through existing machining methods. In order to achieve this goal, the industry's approach is to precisely cut and grind the stator core to meet the high-precision requirements.

[0004] After searching, Chinese patent publication No. CN219918550U discloses a stator structure of an outer rotor motor, which includes a winding stator, a center shaft and PIN needles. The winding stator is disc-shaped. The center shaft is arranged at the center of the winding stator. A plurality of PIN needles are arranged on the disc surface of the winding stator, and the metal needle heads of each PIN needle are insulated from the winding stator. The PIN needles designed in this scheme can be directly connected to the winding stator and used as the connection head of the coil, which can facilitate the winding of the enameled wire. When the winding machine is used to wind the coil, the mechanical action of the winding machine can be used to realize the winding after the coil is wound. After the laser ablation of the insulating layer of the enameled wire, the automatic welding machine can be used to melt the solder wire on the metal needle head of the PIN needle to weld the electronic wire, enameled wire and PIN needle together. This design avoids the loosening of the lead-out end in the metal needle head. However, the above structure does not consider the large amount of metal dust generated in the grinding process of the existing technology. These dust not only seriously affects the working environment inside the factory, but also puts pressure on environmental protection. Moreover, this method also increases the cost, reduces the efficiency, endangers the safety of personnel, and reduces the quality of products. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a stator structure of an outer rotor motor, which aims to improve the problems of increasing cost, reducing efficiency, endangering personnel safety and reducing product quality in the prior art.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: A stator structure of outer rotor motor, including protection shell, the inner wall left and right sides of protection shell are all fixedly connected with a plurality of bearing seat, the inner wall of bearing seat is opened with connecting groove, the inner wall of connecting groove is clamped with stator core, the inner wall of stator core is all fixedly connected with a plurality of stator winding, the middle part inner wall of bearing seat is fixedly connected with ball bearing, the inner wall of ball bearing is fixedly connected with the shaft, the outer wall middle part of the shaft is fixedly connected with connecting column, the outer wall of connecting column is fixedly connected with rotor core, the outer wall of rotor core is all wound with a plurality of rotor winding, the left side of protection shell is provided with heat dissipation mechanism, and the heat dissipation mechanism is used to provide heat dissipation function and play the protection effect.

[0007] Through the above technical scheme: protection shell is solid cylindrical structure, is made of high-strength material, can provide reliable protection for each component in the motor, these bearing seats are connected closely with the inner wall of protection shell through firm welding mode, the size of connecting groove is accurately designed, can be clamped closely with stator core, ensures that stator core keeps stable position during the operation of motor, stator core is made of a piece of silicon steel sheet and is laminated, has good magnetic conductivity, these stator windings are made of high-quality conductive material, provide power for the operation of motor, the inner ring of ball bearing is closely matched with the shaft, so that the shaft can rotate smoothly in bearing seat, the shaft has good mechanical properties, connecting column can bear the huge torque generated during the operation of motor, rotor core is made of magnetic material, can rotate under the action of magnetic field generated by stator winding, these rotor windings interact with stator winding, and the operation of motor is jointly promoted, the main function of heat dissipation mechanism is to provide heat dissipation function for motor, and the effect of protecting motor is played.

[0008] Further describe the above technical scheme as follows:

[0009] The heat dissipation mechanism includes a shell, the right side of the shell is fixedly connected with the left side of the protection shell, a plurality of air holes are formed in the outer wall of the shell, the right side of the protection shell is fixedly connected with a second shell, a plurality of heat dissipation holes are formed in the outer wall of the second shell, a heat dissipation fan is fixedly connected to the outer wall of the right side edge of the shaft, and a plurality of air holes are formed in the outer wall of the bearing seat.

[0010] Through the technical scheme, the heat dissipation mechanism is formed by the shell one, the right side of the shell one is firmly connected to the left side of the protective shell, a plurality of air holes are uniformly distributed on the outer surface of the shell one to ensure good air circulation, the right side of the protective shell is fixedly connected with the shell two, the outer surface of the shell two is also provided with a plurality of heat dissipation holes to further enhance the heat dissipation effect, the right edge of the rotating shaft is fixedly installed with a heat dissipation fan, the operation of the heat dissipation fan will effectively promote air flow and improve heat dissipation efficiency, the outer wall of the bearing seat is designed with a plurality of air holes, and the air holes, the air holes and the heat dissipation holes cooperatively form a complete heat dissipation structure to ensure the stability and safety of the equipment during long-time operation.

[0011] Further description of the above technical scheme is as follows:

[0012] The outer wall of the protective shell is fixedly connected with a plurality of decorative strips, and the decorative strips are uniformly arranged.

[0013] Through the above technical scheme, the outer wall of the protective shell is fixedly connected with a plurality of decorative strips, and the arrangement between the decorative strips is uniform and orderly.

[0014] Further description of the above technical scheme is as follows:

[0015] The outer wall of the rotating shaft is provided with a mounting hole on the left side, and the bottom of the protective shell is fixedly connected with a connecting frame.

[0016] Through the above technical scheme, a mounting hole is designed on the left side of the outer wall of the rotating shaft for the installation of specific components, and a connecting frame is fixedly connected to the bottom of the protective shell for connecting other equipment.

[0017] Further description of the above technical scheme is as follows:

[0018] The outer wall of the connecting frame is provided with a plurality of connecting holes, and the connecting holes are symmetrically distributed in the corners.

[0019] Through the above technical scheme, the outer wall of the connecting frame is uniformly provided with a plurality of connecting holes, and the connecting holes are symmetrically distributed in the corners for stable connection and fixation.

[0020] Further description of the above technical scheme is as follows:

[0021] The right side of the connecting frame is fixedly connected with an electric wire, and the electric wire is composed of a high-conductivity material.

[0022] Through the above technical scheme, the electric wire is fixedly connected to the right side of the connecting frame, and the electric wire is composed of a high-conductivity material to ensure the efficiency of current transmission.

[0023] Further description of the above technical scheme is as follows:

[0024] The other end of the electric wire is fixedly connected with a plug, and the outer wall of the plug is covered with rubber material.

[0025] Through the above technical scheme, the other end of the electric wire is fixedly connected with the plug, and the outer wall of the plug is covered with rubber material, which aims to provide additional protection and insulation effect.

[0026] Further description of the above technical scheme:

[0027] The bearing seat is made of silicon steel sheets, and the rotor winding is composed of multiple layers of coils.

[0028] Through the above technical scheme, the bearing seat is made of silicon steel sheets through precise lamination process, which not only ensures the stability of the structure, but also optimizes the electromagnetic performance, and the rotor winding is composed of multiple layers of fine coils, each layer of coil is carefully arranged to realize effective conversion between electric energy and mechanical energy.

[0029] The utility model has the advantages of the following beneficial effects:

[0030] 1. In the utility model, the bearing seat and the stator core are in interference fit to eliminate the gap, realize accurate alignment, the inner wall has a ball bearing to reduce resistance, the connecting column connects the rotor core, the rotor winding and the stator winding interact, ensure good operation, avoid additional processing, reduce cost, improve environment, improve production efficiency and product quality, meet enterprise demand.

[0031] 2. In the utility model, the protective shell is provided with the shell one and the shell two on both sides to form a closed structure, the air holes and the heat dissipation holes are arranged on the outer walls of the shell one and the shell two, the air holes are arranged on the outer wall of the bearing seat, and the air flow cavity is formed, the rotating shaft drives the heat dissipation fan to exhaust hot air and introduce cold air, realize heat dissipation, the structure is simple and easy to maintain, the energy is well used, the equipment life is prolonged, the resources are saved, and the heat dissipation demand is met. DRAWINGS

[0032] Figure 1 A front side perspective view of a protective shell of a stator structure of an outer rotor motor is provided for the utility model;

[0033] Figure 2 A partial structure split drawing of a bearing seat of a stator structure of an outer rotor motor is provided for the utility model;

[0034] Figure 3 A partial structure drawing of a stator core of a stator structure of an outer rotor motor is provided for the utility model;

[0035] Figure 4 A partial structure display drawing of a heat dissipation fan of a stator structure of an outer rotor motor is provided for the utility model;

[0036] Figure 5 A partial structure schematic view of a stator structure connecting frame of an outer rotor motor is provided in the utility model.

[0037] Legend:

[0038] 1, protective shell; 2, heat dissipation mechanism; 201, shell one; 202, air hole; 203, shell two; 204, heat dissipation hole; 205, heat dissipation fan; 206, air hole; 3, bearing seat; 4, connecting groove; 5, stator core; 6, stator winding; 7, ball bearing; 8, rotating shaft; 9, connecting column; 10, rotor core; 11, rotor winding; 12, decorative strip; 13, mounting hole; 14, connecting frame; 15, connecting hole; 16, electric wire; 17, plug. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0040] Please refer to the drawings of the embodiments of the utility model Figure 1 , the drawings of the embodiments of the utility model Figure 2 and the drawings of the embodiments of the utility model Figure 3 , the utility model provides an embodiment: a stator structure of an outer rotor motor, including protective shell 1, the inner wall left and right sides of protective shell 1 are fixedly connected with multiple bearing seats 3, the inner wall of bearing seat 3 is provided with connecting groove 4, the inner wall of connecting groove 4 is clamped with stator core 5, the inner wall of stator core 5 is fixedly connected with multiple stator windings 6, the middle inner wall of bearing seat 3 is fixedly connected with ball bearing 7, the inner wall of ball bearing 7 is fixedly connected with rotating shaft 8, the outer wall middle part of rotating shaft 8 is fixedly connected with connecting column 9, the outer wall of connecting column 9 is fixedly connected with rotor core 10, the outer wall of rotor core 10 is wound with multiple rotor windings 11, the left side of protective shell 1 is provided with heat dissipation mechanism 2, and heat dissipation mechanism 2 is used to provide heat dissipation function and play a protective role;

[0041] Specifically, the protective shell 1 is in a solid cylindrical structure, made of high-strength material, which can provide reliable protection for various components inside the motor, the bearing seat 3 is tightly connected with the inner wall of the protective shell 1 by firm welding, the size of the connecting groove 4 is accurately designed to tightly engage with the stator core 5, ensuring that the stator core 5 maintains a stable position during the operation of the motor, the stator core 5 is made of a piece of silicon steel sheet, which has good magnetic conductivity, the stator winding 6 is made of high-quality conductive material, which provides power for the operation of the motor, the inner ring of the ball bearing 7 is tightly matched with the rotating shaft 8, so that the rotating shaft 8 can rotate smoothly in the bearing seat 3, the rotating shaft 8 has good mechanical properties, the connecting column 9 can withstand the huge torque generated during the operation of the motor, the rotor core 10 is made of magnetic material and can rotate under the action of the magnetic field generated by the stator winding 6, the rotor winding 11 interacts with the stator winding 6 to jointly drive the operation of the motor, and the heat dissipation mechanism 2 mainly provides heat dissipation function for the motor and plays a protective role.

[0042] Please refer to the attached Figure 1 , attached Figure 2 and attached Figure 4 , the heat dissipation mechanism 2 comprises an outer shell 201, the right side of the outer shell 201 is fixedly connected with the left side of the protective shell 1, a plurality of air holes 202 are formed in the outer wall of the outer shell 201, the right side of the protective shell 1 is fixedly connected with an outer shell 203, a plurality of heat dissipation holes 204 are formed in the outer wall of the outer shell 203, a heat dissipation fan 205 is fixedly connected with the outer wall of the right side edge of the rotating shaft 8, and a plurality of air holes 206 are formed in the outer wall of the bearing seat 3.

[0043] Specifically, the heat dissipation mechanism 2 is composed of an outer shell 201, the right side of the outer shell 201 is firmly connected to the left side of the protective shell 1, a plurality of air holes 202 are uniformly distributed on the outer surface of the outer shell 201 to ensure good air circulation, the right side of the protective shell 1 is fixedly connected with an outer shell 203, the outer surface of the outer shell 203 is also provided with a plurality of heat dissipation holes 204 to further enhance the heat dissipation effect, a heat dissipation fan 205 is fixedly installed at the right side edge of the rotating shaft 8, the operation of the heat dissipation fan 205 will effectively promote air flow and improve heat dissipation efficiency, and a plurality of air holes 206 are designed on the outer wall of the bearing seat 3, which cooperates with the above-mentioned air holes 202 and heat dissipation holes 204 to form a complete heat dissipation structure, ensuring the stability and safety of the equipment during long-time operation.

[0044] Please refer to the attached Figure 1 , attached Figure 2 and attached Figure 5The outer wall of the protective shell 1 is fixedly connected with a plurality of decorative strips 12, the decorative strips 12 are arranged uniformly, the outer wall of the rotating shaft 8 is provided with a mounting hole 13 on the left side, the bottom of the protective shell 1 is fixedly connected with a connecting frame 14, the outer wall of the connecting frame 14 is provided with a plurality of connecting holes 15, and the connecting holes 15 are symmetrically distributed at the corners;

[0045] Specifically, the outer wall of the protective shell 1 is fixedly connected with a plurality of decorative strips 12, the decorative strips 12 are arranged uniformly, the outer wall of the rotating shaft 8 is provided with a mounting hole 13 on the left side, the bottom of the protective shell 1 is fixedly connected with a connecting frame 14, the outer wall of the connecting frame 14 is provided with a plurality of connecting holes 15, and the connecting holes 15 are symmetrically distributed at the corners;

[0046] Please refer to the accompanying Figure 1 , the accompanying Figure 2 and the accompanying Figure 3 , the right side of the connecting frame 14 is fixedly connected with an electric wire 16, the electric wire 16 is composed of a high-conductivity material, the other end of the electric wire 16 is fixedly connected with a plug 17, the outer wall of the plug 17 is protected by rubber material, and the bearing seat 3 is composed of silicon steel sheets through lamination;

[0047] Specifically, the right side of the connecting frame 14 is fixedly connected with an electric wire 16, the electric wire 16 is composed of a high-conductivity material, the other end of the electric wire 16 is fixedly connected with a plug 17, the outer wall of the plug 17 is protected by rubber material, and the bearing seat 3 is composed of silicon steel sheets through lamination;

[0048] Working principle: the gap between the bearing seat 3 and the stator core 5 is eliminated by forming an interference fit between the inner diameter of the bearing seat 3 and the outer diameter of the stator core 5, and the required accurate alignment is directly realized by relying on close physical contact, the inner wall of the bearing seat 3 is also provided with a ball bearing 7 to reduce resistance, the connecting column 9 connects the ball bearing 7 through the connecting rotating shaft 8, and then fixedly connects the rotor core 10, and the rotor core 10 is uniformly distributed with the rotor winding 11, and good running effect is realized through the action between the rotor winding 11 and the stator winding 6, so that further processing of the stator core 5 is not required, cost is saved, air quality and personnel health are improved, production efficiency is improved, product quality is improved, and enterprise demand is met;

[0049] The product is closed by installing the shell one 201 and the shell two 203 on the left and right sides of the protection shell 1, air holes 202 are arranged on the outer wall of the shell one 201, heat dissipation holes 204 are arranged on the outer wall of the shell two 203, and air holes 206 are arranged on the outer wall of the bearing seat 3, the three form an air circulation cavity, the rotation of the rotating shaft 8 drives the heat dissipation fan 205 arranged on the outer wall at the same time when the product is running, so that hot air is discharged from the end of the shell two 203, then enters relatively cold air, and the heat dissipation effect is realized, the structure is simple, maintenance is convenient, energy is utilized, the service life of the equipment is improved, resources are saved, and the heat dissipation demand is met.

[0050] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A stator structure of an outer rotor motor, comprising a protective shell (1), characterized in that: The left and right sides of the inner wall of the protective shell (1) are fixedly connected to a plurality of bearing seats (3), the inner wall of the bearing seat (3) is provided with a connecting groove (4), the inner wall of the connecting groove (4) is engaged with a stator core (5), the inner wall of the stator core (5) is fixedly connected to a plurality of stator windings (6), the middle inner wall of the bearing seat (3) is fixedly connected to a ball bearing (7), the inner wall of the ball bearing (7) is fixedly connected to a rotating shaft (8), the middle part of the outer wall of the rotating shaft (8) is fixedly connected to a connecting column (9), the outer wall of the connecting column (9) is fixedly connected to a rotor core (10), the outer wall of the rotor core (10) is wound with a plurality of rotor windings (11), and a heat dissipation mechanism (2) is provided on the left side of the protective shell (1), the heat dissipation mechanism (2) is used to provide heat dissipation function and play a protective role.

2. The stator structure of an outer rotor motor according to claim 1, characterized in that: The heat dissipation mechanism (2) comprises a shell 1 (201), the right side of the shell 1 (201) is fixedly connected to the left side of the protective shell (1), the outer wall of the shell 1 (201) is provided with a plurality of air holes (202), the right side of the protective shell (1) is fixedly connected to the shell 2 (203), the outer wall of the shell 2 (203) is provided with a plurality of heat dissipation holes (204), a heat dissipation fan (205) is fixedly connected to the right edge of the outer wall of the rotating shaft (8), and the outer wall of the bearing seat (3) is provided with a plurality of air holes (206).

3. The stator structure of an outer rotor motor according to claim 1, characterized in that: The outer wall of the protective shell (1) is fixedly connected with a plurality of decorative strips (12), and the decorative strips (12) are evenly arranged.

4. The stator structure of an outer rotor motor according to claim 1, characterized in that: A mounting hole (13) is provided on the left side of the outer wall of the rotating shaft (8), and a connecting frame (14) is fixedly connected to the bottom of the protective shell (1).

5. The stator structure of an outer rotor motor according to claim 4, characterized in that: The outer wall of the connecting frame (14) is provided with a plurality of connecting holes (15), and the connecting holes (15) are symmetrically distributed at the corners.

6. The stator structure of an outer rotor motor according to claim 4, characterized in that: The right side of the connecting frame (14) is fixedly connected with an electric wire (16), and the electric wire (16) is made of a highly conductive material.

7. The stator structure of an outer rotor motor according to claim 6, characterized in that: The other end of the electric wire (16) is fixedly connected to a plug (17), and the outer wall of the plug (17) is protected by a rubber material.

8. The stator structure of an outer rotor motor according to claim 1, characterized in that: The bearing seat (3) is formed by stacking silicon steel sheets, and the rotor winding (11) is composed of multiple layers of coils.

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