Permanent magnet motor stator core

Abstract

The utility model discloses a kind of permanent magnet motor stator core, belong to motor technical field.The utility model includes stator core body, and winding slot is annularly provided in stator core body, the top of each winding slot is provided with buckle, the both sides of each buckle are equipped with transverse piece, the top of stator core body is annularly provided with reserved slot, each winding slot is communicated with two adjacent reserved slots, and two transverse pieces are matched in corresponding reserved slot.The utility model is limited to coil by the detachable buckle of setting, and the transverse piece of the both sides of buckle is fixed in stator core reserved slot by bolt, so that buckle can stably compress winding coil, and the design effectively solves the problem that the compression force of traditional slot wedge fixing mode is uneven and difficult to disassemble and assemble, and modular design allows any buckle to be individually disassembled for partial repair, without the need for overall disassembly and assembly winding, and maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a permanent magnet motor stator core. Background Technology

[0002] In the field of permanent magnet motors, the stator core, as one of the core components, directly affects the overall performance and operational stability of the motor. The stator core typically has winding slots for winding coils, and the winding quality and fixing method of the coils are crucial to the motor's electromagnetic performance, heat dissipation, and service life. Currently, the fixing of the winding coils in permanent magnet motor stator cores on the market mainly relies on structures such as wire-fixing blocks installed within the winding slots.

[0003] In the prior art, such as the permanent magnet motor stator core disclosed in the Chinese authorized patent (publication number: CN202222699046.X), the T-shaped structure of the wire fixing block used in the patent can prevent the coil from falling off. However, during the operation of the motor, the winding coil is affected by factors such as electromagnetic force and centrifugal force, which can cause the coil to loosen easily. The wire fixing block has limited effect on the overall fixation of the coil in the winding slot. Especially when the motor runs for a long time or bears a large load, the coil may be displaced in the winding slot, which will affect the electromagnetic performance of the motor. Utility Model Content

[0004] The purpose of this invention is to provide a permanent magnet motor stator core that solves the problem of coil displacement by using a detachable buckle to limit the coil position.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model relates to a permanent magnet motor stator core, comprising a stator core body, a winding groove annularly formed within the stator core body, a buckle at the top of each winding groove, and cross plates mounted on both sides of each buckle. A reserved groove annularly formed at the top of the stator core body, wherein each winding groove is connected to two adjacent reserved grooves, and the two cross plates are fitted into the corresponding reserved grooves.

[0007] Furthermore, the horizontal plate has light holes, and bolts are fitted inside the light holes.

[0008] Furthermore, a threaded hole is provided on the top of the stator core body, which is connected to a reserved slot, and the bolt threads are engaged in the threaded hole.

[0009] Furthermore, a steel plate is provided at the bottom of the buckle, and a spring is provided between the steel plate and the buckle.

[0010] Furthermore, sliders are installed on both sides of the steel sheet, and grooves that match the sliders are opened on both sides of the buckle. A rubber pad is installed on the bottom of the steel sheet.

[0011] Furthermore, each winding slot is equipped with a T-shaped block.

[0012] This utility model has the following beneficial effects:

[0013] This utility model limits the coil by setting a detachable buckle. The horizontal pieces on both sides of the buckle are fixed in the reserved slot of the stator core by bolts, so that the buckle can stably press the winding coil. This design effectively solves the problems of uneven pressing force and difficult disassembly and assembly in the traditional slot wedge fixing method. Moreover, the modular design allows any buckle to be disassembled individually for local maintenance without disassembling the entire winding, thus improving maintenance efficiency.

[0014] This invention further restricts the coil by setting steel plates and springs. A sliding steel plate and spring combination structure is added to the bottom of the buckle, which improves the dynamic fixing effect of the winding. The spring provides continuous elastic pressure and automatically compensates for the size changes of the winding caused by thermal expansion and contraction or vibration, so that the fluctuation range of the clamping force is controlled within a certain range. The steel plate floats in the buckle groove by a slider, which adapts to the height difference of different winding layers.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the stator core;

[0017] Figure 2 for Figure 1 An enlarged structural diagram at point A in the middle;

[0018] Figure 3 This is a structural diagram of the buckle and the horizontal piece;

[0019] Figure 4 This is a schematic diagram of the structure of the buckle and the steel plate.

[0020] In the diagram: 1. Stator core body; 101. Winding groove; 102. T-block; 104. Reserved groove; 105. Threaded hole; 2. Buckle; 201. Slide groove; 3. Bolt; 4. Steel sheet; 5. Spring sheet; 6. Slider; 7. Rubber pad; 8. Horizontal piece; 801. Open hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a permanent magnet motor stator core, including a stator core body 1, with a winding groove 101 annularly formed inside the stator core body 1. Each winding groove 101 is provided with a T-shaped block 102, which provides bottom positioning for the winding and forms a double fixation with the top buckle 2. Each winding groove 101 is provided with a buckle 2 at the top, and each buckle 2 has a horizontal piece 8 on both sides. The horizontal piece 8 has a light hole 801, and a bolt 3 is fitted inside the light hole 801. The top of the stator core body 1 has a threaded hole 105, which is connected to a reserved slot 104. The bolt 3 is threaded into the threaded hole 105. The top of the stator core body 1 has a reserved slot 104 annularly formed at the top, and each winding groove 101 is connected to two adjacent reserved slots 104. The two horizontal pieces 8 are fitted into the corresponding reserved slots 104.

[0023] When bolt 3 is screwed into the threaded hole 105 corresponding to the top of stator core body 1, a downward locking force is generated. This force is transmitted to the main body of buckle 2 through cross plate 8, causing the entire buckle 2 to displace vertically downward, and finally applying pressure to the winding coil. The connection design between threaded hole 105 and reserved slot 104 ensures that bolt 3 can directly act on cross plate 8, forming a complete force transmission chain and facilitating the installation of buckle 2. When the motor is running, the rigid structure of buckle 2 restricts the overall displacement. When maintenance is required, simply loosen bolt 3 corresponding to specific winding slot 101, and the rebound force of spring plate 5 will automatically lift buckle 2 to a certain height, making it convenient for operators to remove the damaged coil. After replacing the new coil, tighten bolt 3 again to restore the fixed state. The whole process does not require disassembling adjacent windings or using special tools.

[0024] A steel plate 4 is provided at the bottom of the buckle 2, and sliders 6 are installed on both sides of the steel plate 4. Slide grooves 201 are opened on both sides of the buckle 2 to cooperate with the sliders 6. A rubber pad 7 is installed at the bottom of the steel plate 4, and a spring piece 5 is provided between the steel plate 4 and the buckle 2. The combination of the steel plate 4 and the spring piece 5 at the bottom of the buckle 2 forms an elastic clamping. The cooperation between the sliders 6 on both sides of the steel plate 4 and the slide grooves 201 on both sides of the buckle 2 allows the steel plate 4 to float to a limited extent in the vertical direction. When the buckle 2 is installed, the pre-tightening force of the spring piece 5 can make the rubber pad 7 at the bottom of the steel plate 4 contact the winding surface first. As the bolt 3 continues to tighten, the spring piece 5 is further compressed, which not only ensures the accuracy of the initial positioning, but also automatically adjusts the final clamping force according to the winding height. The rubber pad 7 increases the coefficient of friction to prevent the coil from slipping, and avoids direct metal contact that could damage the insulation layer. The change in winding size caused by temperature changes is automatically compensated by the elastic deformation of the spring piece 5 to maintain a stable clamping force.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A permanent magnet motor stator core, comprising a stator core body (1), characterized in that: The stator core body (1) has a winding groove (101) in a ring shape inside. Each winding groove (101) has a buckle (2) at the top and a cross piece (8) is installed on both sides of each buckle (2). The top of the stator core body (1) is provided with a reserved slot (104) in an annular shape. Each winding slot (101) is connected to two adjacent reserved slots (104), and the two horizontal pieces (8) are fitted in the corresponding reserved slots (104).

2. A permanent magnet motor stator core according to claim 1, characterized in that, The transverse piece (8) has a light hole (801) and a bolt (3) is fitted inside the light hole (801).

3. A permanent magnet motor stator core according to claim 2, characterized in that, The top of the stator core body (1) is provided with a threaded hole (105), which is connected to the reserved slot (104), and the bolt (3) is threadedly fitted in the threaded hole (105).

4. A permanent magnet motor stator core according to claim 1, characterized in that, A steel sheet (4) is provided at the bottom of the buckle (2), and a spring sheet (5) is provided between the steel sheet (4) and the buckle (2).

5. A permanent magnet motor stator core according to claim 4, characterized in that, The steel sheet (4) is equipped with sliders (6) on both sides, and the buckle (2) is provided with grooves (201) on both sides to match the sliders (6). The bottom of the steel sheet (4) is equipped with a rubber pad (7).

6. A permanent magnet motor stator core according to claim 1, characterized in that, Each of the winding slots (101) is provided with a T-shaped block (102).

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