A kind of round structure and outer rotor motor of coiling

Abstract

The utility model discloses a kind of round stator structure and outer rotor motor, comprising: wire holder;Multiple cores, install in wire holder, be equipped with tooth portion, the end of tooth portion is equipped with yoke portion, the other end of tooth portion is equipped with boot portion, and butt joint structure is equipped on tooth portion, the yoke portion of adjacent two cores is mutually butted through butt joint structure, and the boot portion between adjacent two cores is connected through connecting bridge;The distance between the yoke portion of two adjacent cores on core is larger, winding equipment can easily pass through between yoke portion and wind, so that winding is more relaxed, winding efficiency is improved, since winding can be in larger distance between tooth portion, so that winding is more convenient and can more relaxedly improve winding slot fullness, and this winding mode no longer needs to pass through slot between boot portion, so slot between boot portion can be set smaller to reduce tooth slot torque.

Description

Technical Field

[0001] This utility model relates to the field of external rotor motors, and in particular to a rolled stator structure and an external rotor motor. Background Technology

[0002] An external rotor motor is a device that converts electrical energy into mechanical energy based on the principle of electromagnetic induction. It is widely used in industry, transportation, and home appliances. Its core function is to generate torque through the interaction of electromagnetic fields and electric current, thereby driving mechanical motion.

[0003] External rotor motors include internal rotor external rotor motors and external rotor external rotor motors. The core feature of internal rotor external rotor motors is that the rotor is located inside the stator and is usually composed of permanent magnets or electromagnets, while the stator is composed of winding coils. External rotor external rotor motors are a special type of external rotor motor in which the rotor is located outside the stator and the stator is fixed in the center position. The rotor is driven to rotate through magnetic field interaction.

[0004] The stator, the stationary part of an external rotor motor, typically consists of an iron core and windings. The iron core is made of laminated silicon steel sheets to reduce eddy current losses, and the windings generate a magnetic field when energized. In AC external rotor motors, the stator windings form a rotating magnetic field through three-phase currents; in DC external rotor motors, the stator may contain permanent magnets or electromagnets.

[0005] In conventional external rotor motor designs, the stator typically employs a solid circular core structure, composed of multiple adjacent teeth. Each tooth has a shoe at one end, forming a slot between adjacent shoes. To ensure smooth winding, a large slot space needs to be reserved between adjacent teeth to allow the winding equipment to pass through smoothly and complete the winding operation on the teeth. If the slot design is too narrow, it will lead to problems such as winding difficulties, reduced winding efficiency, and insufficient slot fill factor. However, an excessively large slot will cause an increase in cogging torque. Utility Model Content

[0006] In order to overcome the shortcomings of existing technology, which uses a whole round iron core, the iron core includes multiple adjacent teeth, one end of the teeth has a shoe, and there are slots between the shoes. In order to facilitate winding, a large slot is required between adjacent teeth. The winding equipment winds the wire on the teeth through the slot. If the slot is too narrow, it will cause winding difficulties, low winding efficiency, and low slot fill factor.

[0007] First aspect

[0008] This utility model provides a rolled stator structure, including:

[0009] Wireframe;

[0010] Multiple iron cores are installed inside the frame and have teeth. One end of the teeth has a yoke and the other end has a shoe. The teeth have a docking structure. The yokes of two adjacent iron cores are docked to each other through the docking structure, and the shoe of two adjacent iron cores are connected by a connecting bridge.

[0011] Optionally, the mating structure includes mortises and tenons, with mortises and tenons respectively located on both sides of the yoke, and the yokes of two adjacent iron cores are mated by the tenons and mortises.

[0012] Optionally, multiple iron cores are arranged in sequence, and the shoe parts of the first and last iron cores are welded and fixed according to the arrangement order.

[0013] Optionally, the thickness of the connecting bridge is 0.3-1mm.

[0014] Optionally, there is a groove between two adjacent boot sections, with a groove width of 0-2mm.

[0015] Optionally, the wire frame includes an upper frame and a lower frame, the upper frame and the lower frame are connected, and a receiving cavity is formed between the upper frame and the lower frame, with the teeth located in the receiving cavity.

[0016] Optionally, the upper sleeve is provided with a first limiting part and a second limiting part, which are located at both ends of the upper sleeve respectively. The first limiting part is provided with a PIN pin connection groove.

[0017] Optionally, the lower sleeve is provided with a third limiting part and a fourth limiting part, which are located at both ends of the upper sleeve, respectively.

[0018] Second aspect

[0019] This utility model provides an external rotor motor, including: the rolled stator structure described in the first aspect.

[0020] The beneficial effects of this utility model are as follows: Before winding, multiple iron cores are connected by a connecting bridge, and the yokes of the iron cores are not butted together. The multiple iron cores are arranged in parallel with a large gap between them. The iron cores can be wound onto the wire frame by entering the gap between the iron cores from one side of the iron core yoke, without having to pass through the slots between the shoe parts. Since the iron cores are not butted together, the gap between two adjacent yokes on the iron core is large, and the winding device can easily pass through the gaps between the yokes to wind the wire, making the winding easier and improving the winding efficiency. Since the wire can be wound between the teeth with a larger gap, the winding is more convenient and the winding slot fill factor can be improved more easily. Moreover, this winding method no longer needs to pass through the slots between the shoe parts, so the slots between the shoe parts can be set to be smaller to reduce the cogging torque. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 These are schematic diagrams of the stator structure before it is rolled up in some embodiments;

[0023] Figure 2 These are schematic diagrams of structures formed by winding on the stator structure before rolling in some embodiments;

[0024] Figure 3 These are structural breakdown diagrams of the rolled stator structure in some embodiments;

[0025] Figure 4 These are schematic diagrams of the core structure in some embodiments;

[0026] Figure 5 yes Figure 4 Enlarged view of section A;

[0027] Figure 6 These are schematic diagrams of the wire frame structure in some embodiments;

[0028] Figure 7 These are schematic diagrams of the stator structure after rolling in some embodiments;

[0029] Figure 8 These are schematic diagrams of the stator structure after BMC plastic coating in some embodiments;

[0030] Figure 9 These are schematic diagrams of the BMC plastic-coated stator structure after machining in some embodiments;

[0031] Figure 10 These are schematic diagrams of the stator structure inside the housing after machining in some embodiments.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Wire frame; 2. Iron core; 201. Toothed part; 202. Yoke part; 203. Boot part; 204. Connecting bridge; 205. Mortise; 206. Tenon; 207. Slot; 101. Upper frame sleeve; 102. Lower frame sleeve; 103. First limiting part; 104. Second limiting part; 105. PIN pin connecting slot; 106. Third limiting part; 107. Fourth limiting part; 3. Winding. Detailed Implementation

[0034] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0035] This utility model provides a rolled stator structure, including: a wire frame 1; a plurality of iron cores 2 installed in the wire frame 1, each having a toothed portion 201, a yoke portion 202 at one end of the toothed portion 201, and a boot portion 203 at the other end of the toothed portion 201. The toothed portion 201 has a mating structure, and the yoke portions 202 of two adjacent iron cores 2 are mated together by the mating structure. The boot portions 203 of two adjacent iron cores 2 are connected by a connecting bridge 204.

[0036] In implementation, multiple iron cores 2 are connected by connecting bridges 204. A wire frame 1 is mounted on the iron cores 2, placing the iron cores 2 within the wire frame 1. Before winding, the multiple iron cores 2 are arranged in parallel. A winding device passes through the gaps between the yokes 202 of the iron cores 2 and winds enameled wire onto the wire frame 1 at the position corresponding to each iron core 2. After winding, the multiple iron cores 2 are wound into a circle using tooling. The yokes 202 of the wound iron cores 2 are then connected to each other via a butt joint structure. The shoe portion 203 of the iron core 2 is located on the outer periphery of the wound structure, and the connecting bridge 204 is located on the outermost side. After winding and forming, the stator structure needs to undergo Bulk Molding (BMC) treatment. Compound (molded plastic) coating process is used to coat the entire stator structure, forming an outer shell. The outermost connecting bridge 204 is then machined to form the complete stator structure. Before winding, multiple iron cores 2 are connected by the connecting bridge 204. The yokes 202 of the iron cores 2 are not butted together, and the multiple iron cores 2 are arranged in parallel with a large gap between them. The winding equipment can enter from one side of the yoke 202 of the iron core 2 through the gap between the iron cores 2 to wind the enameled wire onto the wire frame 1, without needing to pass through... Since the slots 207 between the shoe parts 203 are not connected iron core 2, the distance between two adjacent yokes 202 on the iron core 2 is relatively large. The winding equipment can easily pass through the yokes 202 for winding, making winding easier and improving winding efficiency. Since winding can be performed between the teeth 201 with a larger spacing, winding is more convenient and the winding slot fill factor can be improved more easily. Moreover, this winding method no longer needs to pass through the slots 207 between the shoe parts 203, so the slots 207 between the shoe parts 203 can be set to be smaller to reduce the cogging torque.

[0037] Furthermore, the iron core 2 is formed by stamping and riveting silicon steel sheets. The iron core 2 is divided into a toothed part 201, a yoke part 202, and a boot part 203. The yoke part 202 and the boot part 203 are located at both ends of the toothed part 201, respectively. The cross-sectional area of ​​the yoke part 202 is larger than that of the toothed part 201, and the cross-sectional area of ​​the boot part 203 is also larger than that of the toothed part 201, so that a groove is formed in the middle of the iron core 2. The wire frame 1 is sleeved on the surface of the toothed part 201. The wire frame 1 includes multiple frames corresponding to the shape of the toothed part 201, and each toothed part 201 is located in each frame.

[0038] In some embodiments, the mating structure includes a mortise 205 and a tenon 206. The mortise 205 and the tenon 206 are respectively disposed on both sides of the yoke 202. The yokes 202 of two adjacent iron cores 2 are mated with the mortise 205 through the tenon 206.

[0039] In practice, each yoke 202 has a mortise 205 and a tenon 206 on both sides. After the multiple iron cores 2 are rolled and joined together, the tenons 206 and mortises 205 of two adjacent yokes 202 are joined together. The tenons 206 are inserted into the mortises 205, and finally a closed loop is formed. All yokes 202 are joined together to form a circular structure. The connection of the yokes 202 can be made more stable by joining the tenons 206 and mortises 205.

[0040] In some cases, the mating structure can also be the teeth on both sides of the yoke 202. Two adjacent yokes 202 can be mated by the mutual cooperation of the teeth, which can also make the yokes 202 mated stably.

[0041] In some embodiments, a plurality of iron cores 2 are arranged in sequence, and the boot portion 203 of the first iron core 2 and the boot portion 203 of the last iron core 2 are welded and fixed according to the arrangement order.

[0042] During implementation, the multiple iron cores 2 after docking are arranged in sequence, with the first iron core 2 docking with the last iron core 2. The yokes 202 of the two iron cores 2 are docked through a docking structure, and the boots 203 of the two iron cores 2 are fixed by welding after docking, thereby ensuring the overall stability after rolling.

[0043] Furthermore, the shoe part of the first iron core and the shoe part of the last iron core are provided with welding strips that meet each other. That is, the first iron core 2 is provided with welding strips, and the last iron core 2 is also provided with welding strips. The first iron core 2 and the last iron core 2 are fixed together by welding strips.

[0044] In some embodiments, the thickness of the connecting bridge 204 is 0.3-1 mm.

[0045] During implementation, the thickness of the connecting bridge 204 is set to 0.3-1mm to ensure the structural stability of the connecting bridge 204 when it follows the rolling and bending of the iron core 2, that is, to ensure that it can be easily bent and will not be broken.

[0046] Furthermore, the connecting bridge 204 is integrally formed with the iron core 2. Both the connecting bridge 204 and the iron core 2 are formed by stamping and riveting silicon steel sheets. The connecting bridge 204 is formed by stamping two adjacent shoe parts 203 of the iron core 2.

[0047] In some embodiments, a slot 207 is provided between two adjacent boot parts 203, and the width of the slot 207 is 0-2mm.

[0048] During implementation, the iron core 2 is formed by stamping and riveting silicon steel sheets. There is a slot 207 between the shoe parts 203 of adjacent iron cores 2. The width of the slot 207 is 0-2mm. The small slot 207 can reduce the cogging torque.

[0049] In some embodiments, the wire frame 1 includes an upper frame sleeve 101 and a lower frame sleeve 102, the upper frame sleeve 101 and the lower frame sleeve 102 are connected, a receiving cavity is formed between the upper frame sleeve 101 and the lower frame sleeve 102, and the tooth 201 is located in the receiving cavity.

[0050] During implementation, the upper frame sleeve 101 is installed above the toothed part 201, and the lower frame sleeve 102 is installed below the toothed part 201. The upper frame sleeve 101 and the lower frame sleeve 102 are connected to each other to form a receiving cavity. The toothed part 201 is located in the receiving cavity. The upper frame sleeve 101 and the lower frame sleeve 102 serve to support the iron core 2 and provide insulation.

[0051] Furthermore, the upper sleeve 101 has a receiving groove at the bottom and the lower sleeve 102 has a receiving groove at the top. The receiving groove of the upper sleeve 101 and the receiving groove of the lower sleeve 102 are connected to form a receiving cavity.

[0052] In some embodiments, the upper sleeve 101 is provided with a first limiting part 103 and a second limiting part 104, the first limiting part 103 and the second limiting part 104 are respectively located at both ends of the upper sleeve 101, and the first limiting part 103 is provided with a PIN pin connection groove 105.

[0053] In implementation, a first limiting part 103 and a second limiting part 104 are respectively provided at both ends of the upper frame sleeve 101. The first limiting part 103 and the second limiting part 104 play a limiting role on the wound enameled wire. When the stator structure provided in this application is installed in the outer rotor motor, the outer rotor motor has a PCB board. Usually, the PCB board is provided with PIN pins. The PIN pins are used to electrically connect with the stator structure. A PIN pin connecting groove 105 is provided on the first limiting part 103, and the PIN pin connecting groove 105 is connected to the PIN pin.

[0054] In some embodiments, the lower sleeve 102 is provided with a third limiting part 106 and a fourth limiting part 107, the third limiting part 106 and the fourth limiting part 107 are respectively located at both ends of the upper sleeve 101, and the third limiting part 106 is provided with a PIN pin connection groove 105.

[0055] During implementation, a third limiting part 106 and a fourth limiting part 107 are respectively provided at both ends of the lower frame sleeve 102. The third limiting part 106 and the fourth limiting part 107 play a limiting role on the enameled wire after winding.

[0056] This utility model also provides an external rotor motor, characterized in that it includes: the rolled stator structure mentioned in the above embodiments, the detailed structure of which has been described in the above embodiments. It will not be repeated here, but it should be noted that the assembled stator structure 1 described in the embodiments of this invention is applied to an external rotor motor.

[0057] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A rolled stator structure, characterized in that, include: Wireframe; Multiple iron cores are installed inside the frame and have teeth. One end of the teeth has a yoke and the other end has a shoe. The teeth have a docking structure. The yokes of two adjacent iron cores are docked to each other through the docking structure, and the shoe of two adjacent iron cores are connected by a connecting bridge.

2. The rolled stator structure according to claim 1, characterized in that, The mating structure includes mortises and tenons, which are respectively located on both sides of the yoke. The yokes of two adjacent iron cores are mated by the tenons and mortises.

3. The rolled stator structure according to claim 1, characterized in that, Multiple iron cores are arranged in sequence, and the shoe parts of the first and last iron cores are welded and fixed according to the arrangement order.

4. The rolled stator structure according to claim 3, characterized in that, The shoe section of the first iron core and the shoe section of the last iron core are provided with interlocking welding strips.

5. The rolled stator structure according to claim 1, characterized in that, The thickness of the connecting bridge is 0.3-1mm.

6. The rolled stator structure according to claim 1, characterized in that, There is a groove between two adjacent boot sections, and the width of the groove is 0-2mm.

7. The rolled stator structure according to claim 1, characterized in that, The wire frame includes an upper frame and a lower frame, which are connected together. A receiving cavity is formed between the upper frame and the lower frame, and the teeth are located in the receiving cavity.

8. The rolled stator structure according to claim 7, characterized in that, The upper shelf sleeve is provided with a first limiting part and a second limiting part, which are located at both ends of the upper shelf sleeve respectively. The first limiting part is provided with a PIN pin connection groove.

9. The rolled stator structure according to claim 7, characterized in that, The lower frame is provided with a third limiting part and a fourth limiting part, which are located at both ends of the upper frame, respectively.

10. An external rotor motor, characterized in that, include: The rolled stator structure according to any one of claims 1 to 9.

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