Anti-falling rotor assembly and motor

Abstract

The utility model provides an anti-drop rotor assembly and a motor, the rotor assembly comprises a rotor iron core, limiting ribs, dovetail grooves, rotor magnets and a winding wire, the periphery of the rotor iron core is uniformly provided with a plurality of limiting ribs, a dovetail groove is formed between every two adjacent limiting ribs, the rotor magnets are installed in the dovetail grooves in a self-axial propulsion manner, and the winding wire is wound on the rotor iron core. The winding wire is wound on the outer side of the rotor iron core, the rotor magnet is pressed in the dovetail groove, structural adhesive is smeared on the contact portion of the rotor magnet and the dovetail groove, and high-temperature-resistant glue is smeared on the winding wire. According to the utility model, the dovetail groove is arranged on the periphery of the rotor iron core, the rotor magnet is pushed and installed in the dovetail groove from the axial direction, and the winding wire is wound on the outer side of the rotor iron core to press the rotor magnet, so that the holding force is increased, the fixing strength of the rotor iron core is improved, and the rotor magnet is effectively prevented from being separated from the rotor iron core in the high-speed rotation process; the utility model has the advantages of simple structure and simple manufacturing and assembling procedures.

Description

Technical Field

[0001] This utility model relates to the field of motor structure technology, specifically to an anti-fall-off rotor assembly and a motor. Background Technology

[0002] During operation, motors need to rotate at high speeds. The rotor magnets inside the motor are usually fixed to the slots of the rotor core with structural adhesive, so that the rotor magnets and the rotor core remain relatively fixed in the direction of rotation. However, the disadvantages of this structure are also very obvious. It cannot guarantee the bonding strength between the rotor magnets and the rotor core. During long-term high-speed rotation, when the centrifugal force of the rotor magnets exceeds the adhesive force of the structural adhesive, the rotor magnets are prone to detaching radially, resulting in failure of the rotor assembly structure and motor failure. Utility Model Content

[0003] To solve the above and other problems, this utility model is achieved through the following technical solution: an anti-fall-off rotor assembly, comprising: a rotor core; limiting ribs, the limiting ribs being uniformly arranged on the outer periphery of the rotor core; a dovetail groove, the dovetail groove being located between two adjacent limiting ribs; a rotor magnet, the rotor magnet being placed in the dovetail groove; and a winding wire, the winding wire being wound around the outside of the rotor core, pressing the rotor magnet tightly into the dovetail groove.

[0004] In one embodiment, the included angle θ between the two sides of the dovetail groove is an acute angle.

[0005] In one embodiment, the included angle θ between the two sides of the dovetail groove ranges from 10° to 30°.

[0006] In one embodiment, structural adhesive is applied to the contact area between the dovetail groove and the rotor magnet.

[0007] In one embodiment, the surface of the wound thread is coated with adhesive.

[0008] In one embodiment, the winding thread is carbon fiber thread or Kevlar thread.

[0009] This utility model also provides a motor, including any of the above-described anti-fall-off rotor assemblies.

[0010] In one embodiment, the motor further includes a housing, a rotating shaft, and a stator assembly. The rotating shaft, the rotor assembly, and the stator assembly are installed inside the housing. The rotating shaft passes through the housing and extends outward. The rotor assembly is fitted onto the rotating shaft, and the stator assembly is fitted onto the outside of the rotor assembly.

[0011] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model sets a dovetail groove on the outer periphery of the rotor core, and the rotor magnet is pushed into the dovetail groove from the axial direction and installed in the dovetail groove. The rotor magnet is pressed by winding wire around the outside of the rotor core, which increases the clamping force and improves the fixing strength of the rotor core, effectively preventing the rotor magnet from separating from the rotor core during high-speed rotation. This utility model has a simple structure and simple manufacturing and assembly procedures. Attached Figure Description

[0012] Figure 1 The diagram shown is an overall schematic of the motor of this utility model;

[0013] Figure 2 The diagram shown is a cross-sectional view of the motor of this utility model;

[0014] Figure 3 The diagram shown is a schematic of the rotor assembly of this utility model;

[0015] Figure 4 The diagram shown is a cross-sectional view of the rotor assembly of this utility model.

[0016] 1-Motor; 11-Housing; 12-Shaft; 13-Rotor assembly; 131-Rotor core; 132-Shaft hole; 133-Limiting rib; 134-Dovetail groove; 135-Rotor magnet; 136-Winding wire; 14-Stator assembly. Detailed Implementation

[0017] Please see Figures 1 to 4 The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0018] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "left," "right," "upper," "lower," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0019] In this utility model, for clarity, the following description is provided: [The observer faces the attached...] Figure 1Observation is performed, with the direction along the axis of rotation designated as "axial" and the direction perpendicular to the axis of rotation designated as "radial". The above description is only for the purpose of clearly describing this utility model, and is not intended to indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Please combine Figure 1 and Figure 2 An electric motor 1 includes a housing 11, a rotating shaft 12, a rotor assembly 13, and a stator assembly 14. The rotating shaft 12, the rotor assembly 13, and the stator assembly 14 are installed inside the housing 11. The rotating shaft 12 passes through the housing 11 and extends outward. The rotor assembly 13 is fitted onto the rotating shaft 12, and the stator assembly 14 is fitted onto the outside of the rotor assembly 13.

[0021] Please combine Figure 3 and Figure 4 The rotor assembly 13 includes a rotor core 131, a shaft hole 132, limiting ribs 133, a dovetail groove 134, a rotor magnet 135, and a winding wire 136. The shaft hole 132 is formed at the center of the rotor core 131, and the shaft hole 132 is used to pass through and install the rotor shaft 12. A plurality of limiting ribs 133 are evenly arranged on the outer periphery of the rotor core 131. The dovetail groove 134 is located between two adjacent limiting ribs 133, and the gap between two limiting ribs 133 forms the dovetail groove 134. The rotor magnet 135 is placed in the dovetail groove 134. The rotor magnet 135 is tile-shaped and conforms to the shape of the dovetail groove 134. The dovetail groove 134 restricts the rotor magnet 135. With 5 radial degrees of freedom, the rotor magnet 135 is axially pushed into the dovetail groove 134, and structural adhesive is applied at the contact position between the rotor magnet 135 and the dovetail groove 134 to make the rotor magnet 135 and the dovetail groove 134 fit tightly together. When the structural adhesive fails, the rotor magnet 135 separates from the rotor core 131 and tends to come off in the radial direction. At this time, the dovetail groove 134 holds the side of the rotor magnet 135. The winding wire 136 is wound around the outside of the rotor core 131, pressing the rotor magnet 135 tightly into the dovetail groove 134. At the same time, the winding wire 136 hugs the rotor magnet 135, generating a hugging force so that the rotor magnet 135 will not separate from the rotor core 131 when running at high speed.

[0022] Specifically, the included angle θ between the two sides of the dovetail groove 134 is an acute angle.

[0023] Furthermore, the included angle θ between the two sides of the dovetail groove 134 ranges from 10° to 30°.

[0024] Specifically, the winding 136 is carbon fiber wire, Kevlar wire or other corresponding materials, and is wound around the outside of the rotor core 131 by corresponding equipment.

[0025] Furthermore, the winding thread 136 is coated with high-temperature resistant adhesive to prevent the winding thread 136 from loosening after winding.

[0026] In summary, this utility model increases the clamping force and improves the fixing strength of the rotor core by setting a dovetail groove on the outer periphery of the rotor core, pushing the rotor magnet into the dovetail groove from the axial direction, and wrapping the rotor magnet with wire on the outside of the rotor core to press it. This effectively prevents the rotor magnet from detaching from the rotor core during high-speed rotation. The structure of this utility model is simple and the manufacturing and assembly process is easy.

[0027] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A retainer-escape rotor assembly, comprising: The application relates to a rotor assembly. The rotor assembly comprises a rotor core, a limiting rib uniformly arranged on the outer periphery of the rotor core, a dovetail groove between two adjacent limiting ribs, a rotor magnet placed in the dovetail groove, and a winding wire wound on the outer side of the rotor core to press the rotor magnet in the dovetail groove. The included angle theta between the two side faces of the dovetail groove is an acute angle. The included angle theta between the two side faces of the dovetail groove ranges from 10 to 30 degrees. The contact position between the dovetail groove and the rotor magnet is coated with structural adhesive. The surface of the winding wire is coated with glue.

2. A retainer-protected rotor assembly as set forth in claim 1 wherein, The winding wire is carbon fiber wire or Kevlar wire.

3. A retainer-protected rotor assembly as set forth in claim 2 wherein, The application further relates to a motor comprising the anti-falling rotor assembly.

4. A retainer-protected rotor assembly as set forth in claim 2 wherein: The motor further comprises a shell, a rotating shaft and a stator assembly, the rotating shaft, the rotor assembly and the stator assembly are installed in the shell, the rotating shaft passes through the shell and extends out, the rotor assembly is sleeved on the rotating shaft, and the stator assembly is sleeved on the outer side of the rotor assembly.

5. A retainer-protected rotor assembly as set forth in claim 4 wherein, ​ 6. A retainer-protected rotor assembly as set forth in claim 4 wherein, ​ 7. An electric machine characterized by ​ 8. The electric machine of claim 7, wherein, ​

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