Inner rotor permanent magnet motor convenient to assemble

Abstract

The utility model discloses an inner rotor permanent magnet motor convenient to assemble. The inner rotor permanent magnet motor comprises an end cover, a stator, a rotor and a mounting rack, the spigot end of the end cover is provided with at least two first positioning pin holes, and the stator is provided with second positioning pin holes corresponding to the first positioning pin holes. The rotor is fixedly arranged in the stator, the end cover and the stator are concentrically arranged and are matched and positioned with the first positioning pin hole and the second positioning pin hole through positioning pins, and the mounting frame is rotationally connected with the rotor and is fixed on the end cover. According to the utility model, the first positioning pin hole and the second positioning pin hole are correspondingly arranged at the seam allowance of the end cover and on the stator, and one end of the positioning pin is fixedly arranged in the first positioning pin hole on the end cover and the other end of the positioning pin is matched with the second positioning pin hole on the stator during assembly, so that rapid installation of the end cover and the stator is completed; the problem that the eccentric assembly of the stator is difficult due to the influence of magnetic pulling force during installation is solved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of motor assembly technology, specifically relating to an internal rotor permanent magnet motor that is easy to assemble. Background Technology

[0002] An inner rotor motor is a common motor structure characterized by a rotor located inside the motor, while the stator windings are fixed to an external stator. In existing inner rotor motors, the rotor is primarily designed with coil excitation, avoiding assembly difficulties caused by the magnetic pull of permanent magnets. However, to increase power density, the rotor needs to be changed to permanent magnet excitation. After conversion, due to magnetic pull, the rotor tends to adhere to the inner circle of the stator and deviate from the center. Since the stator and end cover are concentrically mounted, the stator deviates from the end cover due to magnetic pull, leading to assembly difficulties. Therefore, there is an urgent need for an inner rotor permanent magnet motor that is easier to assemble. Utility Model Content

[0003] To address the aforementioned shortcomings, the purpose of this utility model is to provide an internal rotor permanent magnet motor that is easy to assemble, thus solving the problem in the prior art where the stator of a permanent magnet motor deviates from the stop due to the influence of magnetic pull during assembly, leading to assembly difficulties.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] An easy-to-assemble internal rotor permanent magnet motor includes an end cover, a stator, a rotor, and a mounting bracket. The end cover has at least two first positioning pin holes on its stop end. The stator has a second positioning pin hole corresponding to the first positioning pin hole. The rotor is fixedly installed inside the stator. The end cover and the stator are concentrically installed and positioned by positioning pins that cooperate with the first positioning pin hole and the second positioning pin hole. The mounting bracket is rotatably connected to the rotor and fixed on the end cover.

[0006] By adopting the above structural design, a first positioning pin hole is provided on the end cover, and a corresponding second positioning pin hole is provided on the stator. During assembly, one end of the positioning pin is fixedly installed in the first positioning pin hole on the end cover, and the other end is engaged with the second positioning pin hole on the stator, thereby completing the quick installation of the end cover and the stator. This solves the problem of difficult assembly caused by the stator deviating from the stop due to the influence of magnetic pull during installation.

[0007] Preferably, a cooling fan is coaxially connected to one end of the stator and rotor, and the cooling fan is located inside the end cover.

[0008] With the above structural design, the cooling fan helps to reduce the heat generated by the rotor inside the motor, lowers the operating temperature of the motor, prevents overheating and damage, and improves the service life of the motor.

[0009] Preferably, the outer edge of the stator is provided with a protrusion, and the two ends of the protrusion are formed to form the second positioning pin hole. A limiting groove is provided at the first positioning pin hole to cooperate with the protrusion.

[0010] With the above structural design, the protrusion is designed to open the second positioning pin hole to avoid affecting the strength of the stator itself. At the same time, the corresponding limiting grooves on the protrusion and end cover can further play a limiting role during assembly, improving the convenience and accuracy of assembly.

[0011] Preferably, the first positioning pin hole, the second positioning pin hole, and the positioning pin are in two sets, with the first positioning pin hole symmetrically arranged on the stop end of the end cover, and the second positioning pin hole symmetrically arranged on both sides of the stator.

[0012] With the above structural design, the positioning pins are set in two symmetrical sets, which makes it easier to limit the position during installation and makes the system more stable after installation, and less prone to vibration and misalignment.

[0013] Preferably, the diameter of the locating pin is 0.1-0.3 mm larger than the diameter of the first locating pin hole and the second locating pin hole to form a clearance fit, and the two ends of the locating pin are chamfered or rounded.

[0014] With the above structural design, the positioning pin and the first positioning pin hole and the second positioning pin hole adopt a clearance fit, which improves the stability of the assembly. At the same time, the end of the positioning pin adopts a chamfer or rounded design, which can play a guiding role during assembly and improve the convenience of assembly.

[0015] Preferably, the mounting bracket and the end cap are provided with corresponding fixing holes, and are connected and fixed by bolts passing through the fixing holes.

[0016] Preferably, one end of the locating pin is installed in the first locating pin hole by thread or interference fit, and the other end is higher than the stop end face.

[0017] By adopting the above structural design, one end of the locating pin is first fixedly connected to the end cover during assembly, and then the stator is installed, which improves assembly efficiency.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model provides a solution by opening a first positioning pin hole and a second positioning pin hole at the stop of the end cover and on the stator respectively. During assembly, one end of the positioning pin is fixedly installed in the first positioning pin hole on the end cover, and the other end is engaged with the second positioning pin hole on the stator, thereby completing the quick installation of the end cover and the stator. This solves the problem of difficult stator assembly due to the influence of magnetic pull during installation and improves work efficiency.

[0020] 2. The protruding strip of this utility model is designed to open the second positioning pin hole to avoid affecting the strength of the stator itself. At the same time, the corresponding limiting groove on the protruding strip and the end cover can play a limiting role during assembly, thereby further improving the convenience and accuracy of assembly. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 yes Figure 1 Exploded view;

[0024] Figure 3 yes Figure 2 Enlarged view at point A;

[0025] Figure 4 This is a structural schematic diagram of the present invention from another angle.

[0026] In the picture:

[0027] 1. End cap, 2. Stator, 3. Rotor, 4. Mounting bracket, 5. First positioning pin hole, 6. Second positioning pin hole, 7. Positioning pin, 8. Cooling fan, 9. Protrusion, 10. Limiting groove, 11. Fixing hole. Detailed Implementation

[0028] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0029] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Please see Figures 1 to 4 An easy-to-assemble internal rotor permanent magnet motor includes an end cover 1, a stator 2, a rotor 3, and a mounting bracket 4. The rotor 3 is fixedly installed inside the stator 2 to form an integral structure, saving assembly time during later assembly. The end cover 1 has at least two first positioning pin holes 5 on its stop end, and the stator 2 has second positioning pin holes 6 corresponding to the first positioning pin holes 5. The end cover 1 and the stator 2 are concentrically installed and positioned by positioning pins 7 engaging with the first positioning pin holes 5 and the second positioning pin holes 6, completing the installation and engagement of the stator 2 and the stop end of the end cover 1. The mounting bracket 4 is rotatably connected to the other end of the rotor 3 via a bearing and fixed to the end cover 1. In this embodiment, the mounting bracket 4 and the end cover 1 have corresponding fixing holes 11, and are connected and fixed by bolts passing through the fixing holes 11, making disassembly and assembly more convenient.

[0031] Please continue reading. Figure 2 and Figure 3 Furthermore, a cooling fan 8 is coaxially connected to one end of the stator 2 and the rotor 3, and the cooling fan 8 is located inside the end cover 1. The two ends of the cooling fan 8 are spaced a certain distance from the inner wall of the end cover 1 and the rotor 3, respectively, to avoid mutual interference.

[0032] Furthermore, the outer edge of the stator 2 is provided with a protruding strip 9, and the two ends of the protruding strip 9 are formed to form the second positioning pin hole 6. A limiting groove 10 is correspondingly provided at the first positioning pin hole 5 to cooperate with the protruding strip 9. Therefore, during installation, not only do the positioning pin 7 and the first positioning pin hole 5 and the second positioning pin hole 6 play a limiting role, but the limiting groove 10 and the protruding strip 9 can also play a limiting role, thereby improving the assembly efficiency and the stability after assembly.

[0033] In this embodiment, the first positioning pin hole 5, the second positioning pin hole 6, and the positioning pin 7 are in two sets, with the first positioning pin hole 5 symmetrically arranged on the stop end of the end cover 1, and the second positioning pin hole 6 symmetrically arranged on both sides of the stator 2. This embodiment is only a preferred embodiment, but the solution of this application is not limited to the number of sets and the arrangement positions of the first positioning pin hole 5, the second positioning pin hole 6, and the positioning pin 7.

[0034] In this embodiment, the diameter of the locating pin 7 is 0.1-0.3 mm larger than the diameter of the first locating pin hole 5 and the second locating pin hole 6 to form a clearance fit, and both ends of the locating pin 7 are chamfered or rounded. One end of the locating pin 7 is installed in the first locating pin hole 5 by thread or interference fit, and the other end is higher than the stop end face to ensure that the other end of the locating pin 7 is fixedly connected to the stator 2.

[0035] The working principle of this utility model is as follows:

[0036] During assembly, the rotor 3 is first installed inside the stator 2 to form a certain structure. Then, one end of the positioning pin 7 is fixedly installed in the first positioning pin hole 5 on the end cover 1. Next, the second positioning pin hole 6 on the stator 2 is aligned with the positioning pin 7 and inserted for fixation. At this time, the positioning pin 7 can act as a positioning and guide post, allowing the stator 2 to be smoothly pushed in and fixedly connected to the stop end of the end cover 1. Finally, the mounting bracket 4 is coaxially rotatably connected to the rotor 3, and the mounting bracket 4 is fixed to the end cover 1 with bolts. Therefore, the installation of the stator 2 can be completed quickly by fixing the positioning pin 7 on the end cover 1, solving the problem of difficult stator assembly due to stator eccentricity caused by magnetic pull, and improving assembly efficiency.

[0037] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model. Other devices that are the same as or similar to these devices are all within the protection scope of this utility model.

Claims

1. A convenient assembly of the inner rotor permanent magnet motor, including end cover (1), stator (2), rotor (3) and mounting frame (4), characterized in that, The end cover (1) is provided with at least two first positioning pin holes (5) on the end of the mouth, the stator (2) is provided with corresponding second positioning pin holes (6) with the first positioning pin holes (5), the rotor (3) is fixedly arranged in the stator (2), and the end cover (1) is concentrically arranged with the stator (2) and is positioned by the first positioning pin holes (5) and the second positioning pin holes (6) through the positioning pin (7), the mounting frame (4) is rotatably connected with the rotor (3) and is fixed on the end cover (1).

2. A flux concentrated interior permanent magnet motor with ease of assembly as claimed in claim 1, wherein The stator (2) and the rotor (3) are coaxially connected with a cooling fan (8) at one end, and the cooling fan (8) is located in the end cover (1).

3. A flux concentrated interior permanent magnet motor with ease of assembly as claimed in claim 1 wherein, The outer side of the stator (2) is provided with a convex strip (9) outwardly, both ends of the convex strip (9) are penetrated to form the second positioning pin holes (6), and a limiting groove (10) is correspondingly arranged at the first positioning pin holes (5) to cooperate with the convex strip (9).

4. A flux-enciente interior rotor permanent magnet electric motor of claim 1, wherein, The first positioning pin holes (5), the second positioning pin holes (6) and the positioning pin (7) are two groups, the first positioning pin holes (5) are symmetrically arranged on the end of the mouth of the end cover (1), and the second positioning pin holes (6) are symmetrically arranged on both sides of the stator (2).

5. A flux-enciente interior rotor permanent magnet electric machine of claim 1, wherein, The diameter of the positioning pin (7) is larger than the hole diameter of the first positioning pin holes (5) and the second positioning pin holes (6) by 0.1-0.3mm to form a gap fit, and both ends of the positioning pin (7) are chamfered or rounded.

6. A flux-enciente interior rotor permanent magnet electric machine of claim 1, wherein, The mounting frame (4) and the end cover (1) are correspondingly provided with fixing holes (11), and are connected and fixed by bolts passing through the fixing holes (11).

7. A flux-enciente interior rotor permanent magnet electric machine of claim 1, wherein, One end of the positioning pin (7) is arranged in the first positioning pin hole (5) through thread or interference fit, and the other end is higher than the end face of the mouth.

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