Plastic magnetic rotor structure

Abstract

The invention relates to the technical field of rotor structures, and discloses a plastic magnetic rotor structure which comprises a plastic magnetic rotor body and a rotating shaft, the rotating shaft is provided with a mounting section, the mounting section is provided with an annular fixing groove and a plurality of rib carving grooves, and the rib carving grooves are circumferentially formed in the two sides of the annular fixing groove and communicate with the annular fixing groove. When the rotating shaft and the plastic magnetic rotor are assembled, the margins of the plastic magnetic rotor body are respectively extruded into the carved rib grooves and the fixing grooves, so that the rotating shaft and the plastic magnetic rotor body are mutually fixed. According to the plastic magnetic rotor, the mechanical meshing force between the rotating shaft and the plastic magnetic rotor can be increased through the design of the carved rib grooves and the fixing grooves, higher physical connection force is provided, and therefore dependence on glue bonding force is reduced, and the problem that the bonding strength is reduced due to glue aging or thermal expansion is solved. Meanwhile, tiny gaps between the plastic magnetic rotor body and the rotating shaft can be effectively reduced through the rib grooves and the fixing grooves, vibration and noise generated by loosening are reduced, and the working stability and comfort of the motor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor structures, and in particular to a plastic magnetic rotor structure. Background Art

[0002] Plastic magnetic rotors are widely used in various motors and equipment. As key moving components, they generate power through the interaction of magnetic fields and electric currents. Glue is often used as a bonding material to securely attach the plastic magnetic rotor to the shaft. While glue provides strong initial adhesion, it is susceptible to aging over time due to environmental factors such as temperature and humidity, leading to a gradual weakening of its bonding properties.

[0003] At the same time, during long-term motor operation, the temperature between the rotor and the shaft rises, causing the glue to expand, generating a thermal expansion effect. This expansion can create a tiny gap between the rotor and the shaft, which in turn causes vibration. This vibration not only affects the operational stability of the equipment but can also lead to poor contact between the plastic magnetic rotor and the shaft, further reducing stability. Prolonged vibration can also cause noise problems, affecting the overall performance and user comfort of the equipment. Therefore, how to overcome problems such as glue aging, thermal expansion, and vibration, and improve the assembly stability of plastic magnetic rotors, has become a pressing technical issue in this field. Summary of the Invention

[0004] The present invention aims to solve the shortcomings of the prior art and provides a plastic magnetic rotor structure.

[0005] In order to solve the above technical problems, the present invention is solved through the following technical solutions.

[0006] A plastic magnetic rotor structure includes a plastic magnetic rotor body and a rotating shaft. The rotating shaft is provided with a mounting section, and the mounting section is provided with an annular fixing groove and multiple ribbed grooves. The multiple ribbed grooves are circumferentially arranged on both sides of the annular fixing groove and are connected to the annular fixing groove. When the rotating shaft and the plastic magnetic rotor are assembled, the excess of the plastic magnetic rotor body is squeezed into the ribbed groove and the fixing groove respectively, so that the rotating shaft and the plastic magnetic rotor body are fixed to each other.

[0007] Preferably, an axial hole is provided in the plastic magnetic rotor body, and the diameter of the axial hole is smaller than the diameter of the rotating shaft.

[0008] Preferably, the number of the rib grooves is 6 or more.

[0009] Preferably, the annular fixing groove has a depth of 1±0.1 mm and a width of 3±0.1 mm.

[0010] Preferably, the depth of the groove is 0.5±0.1 mm, the width of the groove is 0.8±0.05 mm, and the length is 8±0.1 mm.

[0011] Preferably, the cross section of the groove is V-shaped.

[0012] By adopting the above technical solution, the present invention achieves significant technical benefits: The design of the ribbed and fixed grooves enhances the mechanical engagement between the rotating shaft and the plastic magnetic rotor, providing a stronger physical connection, thereby reducing reliance on glue adhesion and thus avoiding the problem of decreased bond strength due to glue aging or thermal expansion. Furthermore, the ribbed and fixed grooves effectively reduce the slight gap between the plastic magnetic rotor body and the rotating shaft, reducing vibration caused by looseness. This stable connection helps reduce instability during equipment operation, reduces noise caused by vibration, and improves the smoothness and comfort of the motor's operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the exploded structure of a plastic magnetic rotor structure of the present invention;

[0014] Figure 2 This is a schematic diagram of a top view of the assembly structure of a plastic magnetic rotor structure of the present invention;

[0015] Figure 3 This is a schematic diagram of the assembly cross-sectional structure of a plastic magnetic rotor structure of the present invention;

[0016] Figure 4 This is a structural schematic diagram of a rotating shaft in a plastic magnetic rotor structure of the present invention;

[0017] Figure 5 yes Figure 4 Schematic diagram of the cross section in the A direction.

[0018] In the figure: 1 - plastic magnetic rotor body, 2 - rotating shaft, 3 - mounting section, 4 - annular fixing groove, 5 - ribbed groove, 6 - shaft hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] Example 1

[0021] like Figures 1 to 4The figure shows a plastic magnetic rotor structure provided by an embodiment of the present application, comprising a plastic magnetic rotor body 1 and a rotating shaft 2. The rotating shaft 2 is provided with a mounting section 3, which is provided with an annular fixing groove 4 and multiple ribbed grooves 5. The multiple ribbed grooves 5 are circumferentially arranged on both sides of the annular fixing groove 4 and are interconnected with the annular fixing groove 4. When the rotating shaft 2 and the plastic magnetic rotor are assembled, the excess of the plastic magnetic rotor body 1 is squeezed into the ribbed grooves 5 and the fixing grooves, respectively, to secure the rotating shaft 2 and the plastic magnetic rotor body 1 to each other. In this embodiment, the provision of the ribbed grooves 5 and the fixing grooves ensures closer contact between the rotating shaft 2 and the plastic magnetic rotor body 1, helping to maintain structural stability in high-temperature environments. Even if the glue expands or degrades due to temperature increases, the mechanical locking between the plastic magnetic rotor body 1 and the rotating shaft 2 maintains the stability of the assembly, preventing loosening due to glue degradation. The interlocking design effectively shares the load between the plastic magnetic rotor body 1 and the rotating shaft 2, reducing damage or wear caused by glue failure, thereby extending the overall service life of the device.

[0022] The plastic magnetic rotor body 1 is provided with an axial hole 6, the diameter of which is smaller than that of the rotating shaft 2. In this embodiment, an interference fit is employed in combination with the design of a ribbed groove 5 and a fixing groove. Interference fit is a mechanical connection method. Plastic magnetic rotors are typically made of plastic or other polymer materials. Because the material itself has a certain degree of elasticity, some plastics, in particular, can withstand a certain degree of deformation when subjected to force and can return to their original shape after the external force is removed. During the assembly process of the plastic magnetic rotor body 1 and the rotating shaft 2, if there is a certain interference fit or contact force between the rotating shaft 2 and the plastic magnetic rotor body 1, the elasticity of the plastic material may be exerted to accommodate this assembly situation. During installation, the rotating shaft 2 and the plastic magnetic rotor are tightly connected by mutual compression, ensuring that the fitting force between the two is greater than zero, thereby enhancing the connection strength. This design can provide stronger tensile and torsional resistance than a conventional fit, making the connection between the rotating shaft 2 and the plastic magnetic rotor body 1 more stable and reliable, and preventing loosening due to vibration or external forces.

[0023] The number of ribbed grooves 5 is six or more, with six being used in this embodiment. The specific number can be adjusted based on the size of the plastic magnetic rotor. The provision of ribbed grooves 5 effectively suppresses relative motion between the plastic magnetic rotor body 1 and the rotating shaft 2, reducing friction and vibration, thereby improving system stability and reducing vibration noise caused by a loose connection. Furthermore, the coordinated design of the ribbed grooves 5 and the fixing grooves provides a tighter fit between the plastic magnetic rotor body 1 and the rotating shaft 2, further enhancing vibration resistance.

[0024] In this embodiment, the depth of the annular fixing groove 4 is 1±0.1mm, the width is 3±0.1mm, the depth of the rib groove 5 is 0.5±0.1mm, the slot width is 0.8±0.05mm, and the length is 8±0.1mm. The dimensional difference between the rotating shaft 2 and the plastic magnetic rotor body 1 is precisely controlled, which can improve the accuracy of the entire assembly system, ensure the accurate docking and position fixation of the components, and thus improve the performance and reliability of the entire equipment.

[0025] Example 2

[0026] like Figure 5 As shown, Example 2 is substantially similar to Example 1, differing in that the cross-section of the rib groove 5 is V-shaped. Due to the geometry of the V-shaped rib groove 5, the contact area between the plastic magnetic rotor body 1 and the rotating shaft 2 is increased, helping to strengthen the stability of the connection and prevent the plastic magnetic rotor body 1 from slipping or loosening on the rotating shaft 2. The V-shaped rib groove 5 design can effectively enhance the engagement force between the rotating shaft 2 and the plastic magnetic rotor body 1, particularly in environments with high rotational speeds or high vibration. It also helps to more evenly distribute the stress applied to the rotating shaft 2 and the plastic magnetic rotor body 1. Compared to grooves of other shapes, the V-shaped rib groove 5 can reduce stress concentration under load, thereby reducing material damage or cracking caused by localized excessive stress, thereby improving the durability and service life of the entire assembly system.

[0027] When the plastic magnetic rotor body 1 and the rotating shaft 2 are initially assembled, the V-shaped ribs 5 help the plastic magnetic rotor body 1 automatically locate itself in the proper position, ensuring a more precise connection between the rotating shaft 2 and the plastic magnetic rotor body 1. Even if there are slight errors during assembly, the V-shaped ribs 5 can compensate for these deviations to a certain extent, ensuring good contact and fit.

[0028] During operation, it can usually withstand a larger axial force because the structure of the V-shaped rib groove 5 can provide a larger contact area. When the axial force is applied, the force can be transmitted more evenly, thereby avoiding excessive local force and improving the reliability of the connection, especially in applications that need to transmit larger torque or load.

[0029] Compared to smoother or straight grooves, the V-shaped grooves 5 can reduce friction between the shaft 2 and the plastic magnetic rotor body 1, particularly during high-speed operation. The groove geometry allows for smoother contact between the shaft 2 and the plastic magnetic rotor body 1, reducing wear and extending the life of the assembly.

[0030] The design of the ribbed grooves 5 and the fixing grooves increases the mechanical engagement between the rotating shaft 2 and the plastic magnetic rotor, providing a stronger physical connection. This reduces reliance on the adhesive strength of the glue, thus preventing the loss of adhesive strength due to glue aging or thermal expansion. Furthermore, the ribbed grooves and fixing grooves effectively reduce the slight gap between the plastic magnetic rotor body 1 and the rotating shaft 2, reducing vibration caused by looseness. This stable connection helps reduce instability during equipment operation, reduces noise caused by vibration, and improves the smoothness and comfort of the motor's operation.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements are inherent to the elements. In the absence of further restrictions, the elements limited by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. In addition, the above-mentioned technical solutions provided in the embodiments of the present application are not described in detail in accordance with the corresponding technical solutions in the prior art to achieve the same principle, so as to avoid excessive elaboration.

[0032] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic magnetic rotor structure, characterized in that: The invention comprises a plastic magnetic rotor body (1) and a rotating shaft (2); a mounting section (3) is provided on the rotating shaft (2); an annular fixing groove (4) and a plurality of ribbed grooves (5) are provided on the mounting section (3); the plurality of ribbed grooves (5) are circumferentially arranged on both sides of the annular fixing groove (4) and are connected to the annular fixing groove (4); when the rotating shaft (2) and the plastic magnetic rotor are assembled, the excess of the plastic magnetic rotor body (1) is squeezed into the ribbed grooves (5) and the fixing grooves respectively, so that the rotating shaft (2) and the plastic magnetic rotor body (1) are fixed to each other.

2. The plastic magnetic rotor structure according to claim 1, characterized in that: An axial hole (6) is provided in the plastic magnetic rotor body (1), and the diameter of the axial hole (6) is smaller than the diameter of the rotating shaft (2).

3. The plastic magnetic rotor structure according to claim 1, characterized in that: The number of the rib grooves (5) is 6 or more.

4. The plastic magnetic rotor structure according to claim 1, characterized in that: The depth of the annular fixing groove (4) is 1±0.1 mm, and the width is 3±0.1 mm.

5. The plastic magnetic rotor structure according to claim 1, characterized in that: The depth of the rib groove (5) is 0.5±0.1 mm, the width of the groove is 0.8±0.05 mm, and the length is 8±0.1 mm.

6. The plastic magnetic rotor structure according to claim 1, characterized in that: The cross section of the groove (5) is V-shaped.

Images