Novel stator structure

Abstract

The utility model provides a novel stator structure, and belongs to the field of motors. The problem that vibration noise is easily generated when an existing inner rotor rotates in a stator is solved. The novel stator structure comprises a stator body with a shaft hole, a plurality of opening type stator grooves are uniformly distributed in the inner circumference of the shaft hole in the circumferential direction, each groove body adopts a radial opening design, the stator body is divided into a plurality of independent stator winding blocks through the stator grooves distributed at intervals, and vibration buffering devices are arranged on the inner circumference surfaces of the shaft holes of the stator winding blocks. The vibration buffering device comprises a movable groove, an elastic protection plate and a rolling assembly, the movable groove is located in the inner circumferential surface of a shaft hole of the stator winding block, mounting pillow blocks are arranged on the two axial sides of the movable groove, and the inner arc face of the elastic protection plate and the shaft hole are kept concentric. And each pin roller is movably mounted in a T-shaped movable cavity formed by matching the elastic protection plate and the mounting plummer block through the bearing assemblies at the two ends. The shock absorber has the advantages of shock absorption and noise reduction.

Description

Technical Field

[0001] This utility model belongs to the field of electric motors and relates to a stator structure, particularly a novel stator structure. Background Technology

[0002] Internal rotor motors are a common type of motor. Their structural feature is that the rotor is located inside the motor, with stator windings arranged around it. The rotor is driven to rotate through electromagnetic induction. Due to their compact structure, high output torque, and fast dynamic response, these motors are widely used in industrial automation, new energy vehicles, aerospace, and other fields.

[0003] Currently, when an internal rotor motor is running at high speed, the gap between the outside of the rotor and the inside of the stator can cause eccentricity or uneven distribution of electromagnetic force during high-speed operation, which can easily lead to high-frequency vibration, resulting in excessive noise and making it difficult to meet the low noise requirements of precision equipment. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a novel stator structure to solve these problems.

[0005] The purpose of this utility model can be achieved through the following technical solution: a novel stator structure, including a stator body with a shaft hole, wherein a plurality of open stator slots are evenly distributed circumferentially along the inner circumference of the shaft hole, and each slot adopts a radial opening design. The stator body is divided into multiple independent stator winding blocks by the stator slots distributed at intervals. The stator winding block is characterized in that a damping device is provided on the inner circumferential surface of the shaft hole to reduce high-frequency vibration and reduce noise.

[0006] The vibration damping device includes a movable groove, an elastic guard plate, and a rolling assembly;

[0007] The movable groove is located on the inner circumferential surface of the shaft hole of the stator winding block, and mounting shaft platforms are provided on both sides of its axial direction. The elastic guard plate is detachably fixed to the mounting shaft platform by fastening bolts, and its inner arc surface is concentric with the shaft hole.

[0008] The rolling assembly includes at least one pair of rotatable damping rollers, each roller being movably mounted in a T-shaped movable cavity formed by the elastic guard plate and the mounting shaft via bearing assemblies at both ends.

[0009] In the aforementioned novel stator structure, the vibration damping rollers have drive shafts at both ends, which pass through the T-shaped movable cavity and are connected to the bearing assembly.

[0010] In the aforementioned novel stator structure, the vibration damping roller comprises a three-layer composite structure, consisting of a stainless steel mandrel, a silicone buffer layer, and a polyurethane elastic outer layer, from the inside out.

[0011] In the aforementioned novel stator structure, the damping rollers roll in close contact with the outer surface of the motor's inner rotor. When the inner rotor rotates at high speed, it can drive the damping rollers to rotate, effectively preventing eccentricity from occurring when the inner rotor rotates at high speed.

[0012] Compared with existing technologies, this novel stator structure has the following advantages:

[0013] 1. The vibration damping rollers utilize a three-layer composite structure, namely a stainless steel spindle, a silicone buffer layer, and a polyurethane outer layer, which combines rigidity and elasticity to effectively absorb high-frequency vibration energy and significantly reduce motor operating noise. The rolling contact between the rollers and the rotor avoids rigid friction, further reducing noise generation.

[0014] 2. The follow-up rotation of the vibration damping rollers can dynamically adjust the gap between the rotor and the stator, avoiding rotor eccentricity caused by centrifugal force during high-speed operation, thus improving operational stability and preventing rotor eccentricity.

[0015] 3. The elastic guard plate adopts a detachable design and is fixed by fastening bolts, which facilitates quick replacement of worn rollers or adjustment of clearance, reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the novel stator structure.

[0017] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0018] In the figure, 1. Stator body; 2. Shaft hole; 3. Stator winding block; 4. Movable groove; 5. Elastic guard plate; 6. Vibration damping roller; 7. Fastening bolt; 8. Mounting shaft platform; 9. T-shaped movable chamber; 10. Drive shaft; 11. Bearing assembly. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2As shown, this novel stator structure includes a stator body 1 with a shaft hole 2. Several open stator slots are evenly distributed circumferentially around the inner circumference of the shaft hole 2. Each slot adopts a radial opening design. The stator body 1 is divided into multiple independent stator winding blocks 3 by the stator slots distributed at intervals. The inner circumferential surface of the shaft hole 2 of the stator winding block 3 is provided with a damping device that can reduce high-frequency vibration and noise. The damping device includes a movable groove 4, an elastic guard plate 5, and a rolling assembly. The movable groove 4 is located on the inner circumferential surface of the shaft hole 2 of the stator winding block 3. Mounting shaft platforms 8 are provided on both axial sides of the movable groove 4. The elastic guard plate 5 is detachably fixed to the mounting shaft platform 8 by fastening bolts 7. Its inner arc surface is concentric with the shaft hole 2. The rolling assembly includes at least one pair of rotatable damping rollers 6. Each roller is movably mounted in a T-shaped movable chamber 9 formed by the elastic guard plate 5 and the mounting shaft platform 8 through bearing assemblies 11 at both ends. The design of the T-shaped movable chamber 9 ensures that the roller can move flexibly in both the axial and radial directions to adapt to dynamic changes at different speeds.

[0021] The vibration-damping roller 6, with its three-layer composite structure (stainless steel spindle + silicone buffer layer + polyurethane outer layer), combines rigidity and elasticity, effectively absorbing high-frequency vibration energy and significantly reducing motor operating noise. The rolling contact between the roller and the rotor avoids rigid friction, further reducing noise generation. The follow-up rotation of the vibration-damping roller 6 can dynamically adjust the gap between the rotor and the stator, preventing rotor eccentricity caused by centrifugal force during high-speed operation, improving operational stability and preventing rotor eccentricity. The elastic guard plate 5 adopts a detachable design and is fixed by fastening bolts 7, facilitating quick replacement of worn rollers or adjustment of the gap, reducing maintenance costs.

[0022] The vibration damping roller 6 has drive shafts 10 at both ends. The drive shafts 10 pass through the T-shaped movable chamber 9 and are connected to the bearing assembly 11. The vibration damping roller 6 has a three-layer composite structure, consisting of a stainless steel core shaft, a silicone buffer layer, and a polyurethane elastic outer layer from the inside out. The vibration damping roller 6 rolls and fits against the outer surface of the inner rotor of the motor. When the inner rotor rotates at high speed, it can drive the vibration damping roller 6 to rotate, effectively preventing the inner rotor from becoming eccentric during high-speed operation. The stainless steel core shaft provides support strength, while the silicone layer and polyurethane layer are responsible for buffering and wear resistance, respectively, extending the service life of the device.

[0023] The core of this new stator structure lies in its ability to suppress high-frequency vibrations and noise during motor operation through a vibration damping device. The specific working principle is as follows:

[0024] Rolling contact of the damping roller 6: The damping roller 6 rolls and fits against the outer surface of the inner rotor of the motor. When the inner rotor rotates at high speed, the rollers counteract the centrifugal force of the rotor through their own rotation, thus preventing the rotor from becoming eccentric.

[0025] The cushioning effect of elastic materials: The polyurethane elastic outer layer and silicone buffer layer of the rollers can absorb high-frequency vibration energy and reduce the vibration transmission to the stator body 1.

[0026] Dynamic balance adjustment: The bearing assembly 11 in the T-shaped movable chamber 9 allows the rollers to rotate freely, and the dynamic load of the rotor is balanced by rolling inertia, further reducing the vibration amplitude.

[0027] Removable design: The elastic guard plate 5 is fixed by fastening bolts 7, which facilitates disassembly, maintenance or replacement of worn parts, and improves the maintainability of the device.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0029] Although this document uses a lot of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any kind of additional limitation would contradict the spirit of this invention.

Claims

1. A novel stator structure, comprising a stator body (1) having a shaft hole (2), wherein a plurality of open stator slots are uniformly distributed circumferentially along the inner circumference of the shaft hole (2), each slot being radially open, and the stator body (1) is divided into multiple independent stator winding blocks (3) by the spaced stator slots, characterized in that, The inner circumferential surface of the shaft hole (2) of the stator winding block (3) is provided with a vibration damping device that can reduce high-frequency vibration and reduce noise. The vibration damping device includes a movable groove (4), an elastic guard plate (5), and a rolling assembly; The movable groove (4) is located on the inner circumferential surface of the shaft hole (2) of the stator winding block (3), and mounting shaft platforms (8) are provided on both sides of its axial direction. The elastic guard plate (5) is detachably fixed to the mounting shaft platform (8) by fastening bolts (7), and its inner arc surface is concentric with the shaft hole (2). The rolling assembly includes at least one pair of rotatable damping rollers (6), each roller being movably mounted in a T-shaped movable chamber (9) formed by the elastic guard plate (5) and the mounting shaft (8) via bearing assemblies (11) at both ends.

2. The novel stator structure according to claim 1, characterized in that, The vibration damping roller (6) has a drive shaft (10) at both ends. The drive shaft (10) passes through the T-shaped movable chamber (9) and is connected to the bearing assembly (11).

3. A novel stator structure according to claim 1, characterized in that, The vibration damping roller (6) comprises a three-layer composite structure, consisting of a stainless steel mandrel, a silicone buffer layer, and a polyurethane elastic outer layer, from the inside out.

4. A novel stator structure according to claim 1, characterized in that, The damping roller (6) rolls and fits against the outer side of the inner rotor of the motor. When the inner rotor rotates at high speed, it can drive the damping roller (6) to rotate, effectively preventing the inner rotor from becoming eccentric when it rotates at high speed.

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