Motor rotor pole structure

Abstract

This utility model relates to the field of motor technology, and in particular to a motor rotor magnetic pole structure, including a rotor core, magnetic pole cores, and a magnetic yoke assembly. The rotor core has a mounting groove. The end of the magnetic pole core closer to the rotor core is the inner end, and the end farther from the rotor core is the outer end. The inner end of the magnetic pole core matches the mounting groove, and the magnetic pole core is fitted into the mounting groove. The magnetic pole core includes an outer end assembly and an inner end assembly that matches the outer end assembly. The outer end assembly and the inner end assembly are fitted together. The magnetic yoke assembly is fitted onto the middle of the magnetic pole core. This design separates the rotor into the rotor core, magnetic pole core, and magnetic yoke assembly for manufacturing, reducing processing difficulty and cost. The magnetic yoke assembly or magnetic poles can be replaced individually without disassembling the rotor core. The fitted connection simplifies the assembly process and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor rotor magnetic pole structure. Background Technology

[0002] Traditional motor rotor magnetic poles mostly adopt an integrated magnetic pole core structure, with the yoke coil directly wound on the integral iron core. This type of integral magnetic pole requires high-precision machining, which is costly and prone to scrap due to dimensional errors. When the yoke coil is damaged, the entire rotor needs to be disassembled, which may even damage the iron core structure, making repair difficult. The yoke and iron core need to be assembled in the narrow space of the rotor, which is inconvenient to operate and has low assembly efficiency. During operation, the magnetic poles are prone to displacement due to vibration, resulting in uneven air gap, affecting motor performance and poor vibration resistance. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the problem that the traditional motor rotor magnetic poles in the prior art mostly adopt an integrated magnetic pole core structure, with the magnetic yoke coil directly wound on the integral iron core, the integral magnetic poles of this structure require high-precision processing, which is costly and prone to scrap due to dimensional errors, so a motor rotor magnetic pole structure is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a motor rotor magnetic pole structure, including a rotor core, magnetic pole cores, and a magnetic yoke assembly. The rotor core has an installation groove. The end of the magnetic pole core closer to the rotor core is the inner end, and the end of the magnetic pole core farther from the rotor core is the outer end. The inner end of the magnetic pole core matches the installation groove, and the magnetic pole core is fitted into the installation groove. The magnetic pole core includes an outer end assembly and an inner end assembly that matches the outer end assembly. The outer end assembly and the inner end assembly are fitted together. The magnetic yoke assembly is fitted onto the middle of the magnetic pole core. The rotor is divided into the rotor core, magnetic pole cores, and magnetic yoke assembly for separate manufacturing, reducing processing difficulty and cost. The magnetic yoke assembly or magnetic poles can be replaced individually without disassembling the rotor core. The fitted connection simplifies the assembly process and improves production efficiency.

[0005] To address the issues of loosening or inaccurate positioning of the separate connections, the assembly further includes an outer end assembly comprising an outer end limiting part and an outer end connecting part, wherein the outer end limiting part and the outer end connecting part are fixedly connected, and a fitting groove is provided on the outer end connecting part.

[0006] The inner end assembly includes an inner end limiting part and an inner end connecting part. The inner end limiting part and the inner end connecting part are fixedly connected. The inner end connecting part is provided with a fitting block that matches the fitting groove. The fitting block is fitted into the fitting groove.

[0007] To address the issue of easy displacement of the inner end assembly within the groove, a mounting groove is further included to accommodate the inner end limiting part and part of the inner end connecting part.

[0008] To address the problem of short circuits caused by directly winding the coil around the iron core, the magnetic yoke assembly further includes an insulating frame and a coil wound around the outside of the insulating frame. The insulating frame is fitted onto the outer end connection and inner end connection of the magnetic pole iron core.

[0009] To address the issue of magnetic leakage or interference caused by improper yoke dimensions, the method further includes a design where the length of the insulating frame in the radial direction of the rotor core is less than the length of the inner end connection in the radial direction of the rotor core, and the length of the insulating frame in the radial direction of the rotor core is greater than the length of the outer end connection in the radial direction of the rotor core.

[0010] To address the issue of magnetic pole loosening or air gap changes caused by vibration, a further improvement is made by providing an installation cavity on the insulating frame, with a stabilizing component arranged inside the installation cavity.

[0011] The stabilizing assembly includes a connecting rod, an elastic element, two movable sleeves, and two abutments. The connecting rod is fixedly connected to the insulating frame. The connecting rod is located between the two movable sleeves. The end of the connecting rod is slidably connected to the movable sleeve on its side. The movable sleeves and abutments correspond one-to-one. The end of the movable sleeve away from the connecting rod is rotatably connected to its corresponding abutment. The elastic element is located between the two movable sleeves. The end of the elastic element abuts against the movable sleeve on its side. One abutment abuts against the outer end limiting part, and the other abutment abuts against the rotor core.

[0012] The beneficial effects of this utility model are: the motor rotor magnetic pole structure provided by this utility model divides the rotor into rotor core, magnetic pole core and magnetic yoke assembly for separate manufacturing, which reduces the processing difficulty and cost, and allows the magnetic yoke assembly or magnetic pole to be replaced separately without disassembling the rotor core. The interlocking connection simplifies the assembly process and improves production efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a utility model Figure 1 A magnified structural diagram of point A in the middle.

[0016] In the diagram: 1. Rotor core, 11. Mounting slot, 2. Magnetic pole core, 21. Outer end limiting part, 22. Outer end connecting part, 221. Fitting slot, 23. Inner end limiting part, 24. Inner end connecting part, 241. Fitting block, 3. Magnetic yoke assembly, 31. Insulating frame, 311. Mounting cavity, 32. Coil, 33. Connecting rod, 34. Elastic element, 35. Movable sleeve, 36. Abutment joint. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0018] like Figure 1 This is a schematic diagram of the structure of this utility model, a motor rotor magnetic pole structure, including a rotor core 1, magnetic pole cores 2, and a magnetic yoke assembly 3. The rotor core 1 has a mounting groove 11 that encloses an inner end limiting part 23 to prevent radial and circumferential movement. The end of the magnetic pole core 2 closest to the rotor core 1 is the inner end, and the end of the magnetic pole core 2 furthest from the rotor core 1 is the outer end. The inner end of the magnetic pole core 2 matches the mounting groove 11, which is used to accommodate the inner end limiting part 23 and part of the inner end connection. Part 24, the magnetic pole core 2 is fitted into the mounting groove 11. The magnetic pole core 2 includes an outer end assembly and an inner end assembly that matches the outer end assembly. The outer end assembly and the inner end assembly are fitted together. The magnetic yoke assembly 3 is fitted onto the middle part of the magnetic pole core 2. The rotor is divided into rotor core 1, magnetic pole core 2 and magnetic yoke assembly 3 for separate manufacturing, which reduces the processing difficulty and cost. The magnetic yoke assembly 3 or the magnetic pole can be replaced separately without disassembling the rotor core. The fitted connection simplifies the assembly process and improves production efficiency.

[0019] like Figure 2 As shown, the outer end assembly includes an outer end limiting part 21 and an outer end connecting part 22. The outer end limiting part 21 and the outer end connecting part 22 are fixedly connected, and the outer end connecting part 22 is provided with a fitting groove 221.

[0020] The inner end assembly includes an inner end limiting part 23 and an inner end connecting part 24. The inner end limiting part 23 and the inner end connecting part 24 are fixedly connected. The inner end connecting part 24 is provided with a fitting block 241 that matches the fitting groove 221. The fitting block 241 is fitted into the fitting groove 221. The fitting groove 221 and the fitting block 241 ensure connection strength and precise alignment.

[0021] like Figure 2 As shown, the magnetic yoke assembly 3 includes an insulating frame 31 and a coil 32 wound around the outside of the insulating frame 31. The insulating frame 31 is fitted onto the outer end connection portion 22 and the inner end connection portion 24 of the magnetic pole core 2. The insulating frame 31 provides reliable electromagnetic isolation and ensures electrical safety.

[0022] like Figure 2 As shown, the length of the insulating frame 31 in the radial direction of the rotor core 1 is less than the length of the inner end connection 24 in the radial direction of the rotor core 1, and the length of the insulating frame 31 in the radial direction of the rotor core 1 is greater than the length of the outer end connection 22 in the radial direction of the rotor core 1. The length of the insulating frame 31 is adapted to the outer end connection 22 and the inner end connection 24, which optimizes the magnetic circuit and avoids structural conflicts.

[0023] like Figure 2 As shown, an installation cavity 311 is provided on the insulating frame 31, and a stabilizing component is arranged in the installation cavity 311.

[0024] The stabilizing assembly includes a connecting rod 33, an elastic element 34, two movable sleeves 35, and two abutment joints 36. The connecting rod 33 is fixedly connected to the insulating frame 31. The connecting rod 33 is located between the two movable sleeves 35. The end of the connecting rod 33 is slidably connected to the movable sleeve 35 on its side. The movable sleeves 35 and abutment joints 36 correspond one-to-one. The end of the movable sleeve 35 away from the connecting rod 33 is rotatably connected to its corresponding abutment joint 36. The elastic element 34 is located between the two movable sleeves 35. The end of the elastic element 34 abuts against the movable sleeve 35 on its side. One abutment joint 36 abuts against the outer end limiting part 21, and the other abutment joint 36 abuts against the rotor core 1. The elastic element 34 elastically abuts to automatically compensate for tolerances and vibrations, thereby improving dynamic stability.

[0025] Assembly process: The coil 32 is wound on the insulating frame 31. The insulating frame 31 is fitted into the middle of the magnetic pole core 2 (i.e., the inner end connection part 24). The fitting groove 221 of the outer end connection part 22 is aligned with the fitting block 241 of the inner end connection part 24 and pressed together. The magnetic yoke assembly 3 is moved so that the magnetic yoke assembly 3 moves towards the outer end limiting part 21. The inner end limiting part 23 and the inner end connection part 24 are embedded into the mounting groove 11 of the rotor core. After installation, the abutment 36 abuts against the outer end limiting part 21 and the rotor core 1 respectively to achieve bidirectional elastic support.

[0026] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric machine rotor pole structure, characterized by The device includes a rotor core (1), a magnetic pole core (2), and a magnetic yoke assembly (3). The rotor core (1) has an installation groove (11). The end of the magnetic pole core (2) closer to the rotor core (1) is the inner end, and the end of the magnetic pole core (2) further away from the rotor core (1) is the outer end. The inner end of the magnetic pole core (2) matches the installation groove (11), and the magnetic pole core (2) is fitted into the installation groove (11). The magnetic pole core (2) includes an outer end assembly and an inner end assembly that matches the outer end assembly. The outer end assembly and the inner end assembly are fitted together. The magnetic yoke assembly (3) is fitted onto the middle part of the magnetic pole core (2).

2. The motor rotor pole structure of claim 1, wherein: The outer end assembly includes an outer end limiting part (21) and an outer end connecting part (22), the outer end limiting part (21) and the outer end connecting part (22) are fixedly connected, and the outer end connecting part (22) is provided with a fitting groove (221); The inner end assembly includes an inner end limiting part (23) and an inner end connecting part (24). The inner end limiting part (23) and the inner end connecting part (24) are fixedly connected. The inner end connecting part (24) is provided with a fitting block (241) that matches the fitting groove (221). The fitting block (241) is fitted into the fitting groove (221).

3. The motor rotor pole structure of claim 2, wherein: The mounting groove (11) is used to accommodate the inner end limiting part (23) and part of the inner end connecting part (24).

4. The motor rotor magnetic pole structure as described in claim 2, characterized in that: The magnetic yoke assembly (3) includes an insulating frame (31) and a coil (32) wound around the outside of the insulating frame (31). The insulating frame (31) is fitted onto the outer end connection part (22) and the inner end connection part (24) of the magnetic pole core (2).

5. The motor rotor magnetic pole structure as described in claim 4, characterized in that: The length of the insulating frame (31) in the radial direction of the rotor core (1) is less than the length of the inner end connection (24) in the radial direction of the rotor core (1), and the length of the insulating frame (31) in the radial direction of the rotor core (1) is greater than the length of the outer end connection (22) in the radial direction of the rotor core (1).

6. The motor rotor magnetic pole structure as described in claim 4, characterized in that: The insulating frame (31) has an installation cavity (311) and a stabilizing component is arranged in the installation cavity (311); The stabilizing assembly includes a connecting rod (33), an elastic element (34), two movable sleeves (35), and two abutments (36). The connecting rod (33) is fixedly connected to the insulating frame (31). The connecting rod (33) is located between the two movable sleeves (35). The end of the connecting rod (33) is slidably connected to the movable sleeve (35) on its side. The movable sleeve (35) and the abutment (36) correspond one-to-one. The end of the movable sleeve (35) away from the connecting rod (33) is rotatably connected to its corresponding abutment (36). The elastic element (34) is located between the two movable sleeves (35). The end of the elastic element (34) abuts against the movable sleeve (35) on its side. One abutment (36) abuts against the outer end limiting part (21), and the other abutment (36) abuts against the rotor core (1).

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