A structurally robust plastic magnetic rotor

Abstract

The utility model belongs to plastic magnetic rotor field especially relates to a plastic magnetic rotor of stable structure. The utility model provides a plastic magnetic rotor of stable structure, include: the axle core, the equal interval spacing fixed connection of outer circumferential surface of axle core along the axial direction has a plurality of annular boss, plastic magnetic ring, the inner circumferential surface of plastic magnetic ring is equipped with the annular recess of corresponding with annular boss one to one, mechanical occlusion mechanism, is located between annular boss and annular recess, is used for enhancing the mechanical occlusion force between annular boss and annular recess, further improves the stability of plastic magnetic rotor structure, through annular boss and recess cooperation and mechanical occlusion mechanism, enhance the connection stability of plastic magnetic ring and axle core, avoid the clearance produced because of the aging failure of glue, prevent plastic magnetic ring and axle core relative rotation or axial movement, reduce equipment vibration and noise, avoid rotor failure.

Description

Technical Field

[0001] This utility model belongs to the field of plastic magnetic rotors, and particularly relates to a plastic magnetic rotor with a stable structure. Background Technology

[0002] As a core component of equipment such as motors and pumps, the structural stability of plastic magnetic rotors directly affects the operating efficiency and service life of the equipment. Traditional plastic magnetic rotors typically consist of two parts: a shaft core and a plastic magnetic ring. The connection between the two mainly relies on adhesive bonding or a simple interference fit.

[0003] When using adhesive bonding, the adhesive is prone to aging and failure due to changes in ambient temperature and humidity. This can lead to gaps between the plastic magnetic ring and the shaft, resulting in relative rotation or axial movement, causing equipment vibration, increased noise, and even rotor failure due to friction and wear. Although a single interference fit can provide a certain circumferential constraint, under long-term high-frequency operation or load fluctuation conditions, the interference is prone to gradual decay due to material fatigue. In particular, the lack of effective positioning in the axial direction makes the plastic magnetic ring prone to sliding along the shaft, causing the overall rotor structure to loosen and affecting the stable operation of the equipment. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a structurally stable plastic magnetic rotor. Through the engagement of annular bosses and grooves and a mechanical interlocking mechanism, the connection stability between the plastic magnetic ring and the shaft core is enhanced, gaps are avoided due to glue aging and failure, relative rotation or axial movement of the plastic magnetic ring and the shaft core is prevented, equipment vibration and noise are reduced, and rotor failure is prevented.

[0005] In view of this, the present invention provides a structurally robust plastic magnetic rotor, comprising:

[0006] A shaft core, wherein multiple annular bosses are fixedly connected at equal intervals along the axial direction on the outer circumferential surface of the shaft core;

[0007] A plastic magnetic ring, wherein the inner circumferential surface of the plastic magnetic ring is provided with annular grooves corresponding one-to-one with the annular bosses;

[0008] The mechanical engagement mechanism is located between the annular boss and the annular groove to enhance the mechanical engagement force between the annular boss and the annular groove, thereby improving the stability of the plastic magnetic rotor structure.

[0009] In this technical solution, the connection stability between the plastic magnetic ring and the shaft is enhanced by the engagement of the annular boss and the groove and the mechanical interlocking mechanism, which avoids gaps caused by glue aging and failure, prevents relative rotation or axial movement between the plastic magnetic ring and the shaft, reduces equipment vibration and noise, and avoids rotor failure.

[0010] Furthermore, the mechanical engagement mechanism includes:

[0011] Multiple hemispherical protrusions are equidistantly fixedly connected to both ends of the annular boss;

[0012] Multiple hemispherical recesses are equidistantly formed on both sides of the inner cavity of the annular groove, and the multiple hemispherical recesses correspond to the positions of multiple hemispherical protrusions and are adapted in size.

[0013] In this technical solution, the engagement of the hemispherical protrusion and the recess enhances the circumferential and axial constraint forces of the annular boss and the annular groove, preventing the plastic magnetic ring from sliding along the shaft core, avoiding structural loosening, ensuring stable operation of the equipment, and enhancing structural stability.

[0014] Furthermore, the space between the annular boss and the annular groove is filled with magnetic powder adhesive.

[0015] In this technical solution, magnetic powder adhesive is used to fill the gaps, combined with mechanical interlocking, to improve the connection strength, reduce loosening caused by adhesive aging, and enhance overall stability.

[0016] Furthermore, the outer circumferential surface of the plastic magnetic ring is provided with annular reinforcing ribs at equal intervals along the axial direction.

[0017] In this technical solution, the structural strength of the plastic magnetic ring is enhanced by annular reinforcing ribs, reducing its deformation caused by stress during operation and indirectly maintaining a stable connection with the shaft core.

[0018] Furthermore, the annular reinforcing rib and the plastic magnetic ring are integrally injection molded structures, and the cross-section of the annular reinforcing rib is an isosceles trapezoid.

[0019] In this technical solution, the overall rigidity and deformation resistance of the plastic magnetic ring are improved by integrally injection-molded isosceles trapezoidal reinforcing ribs, ensuring the long-term stability of the connection with the shaft core.

[0020] Furthermore, the shaft core is integrally formed with the plurality of annular bosses.

[0021] In this technical solution, the shaft core and the annular boss are integrally formed, which enhances the structural strength, prevents the boss from loosening, and provides a reliable foundation for a stable connection with the plastic magnetic ring.

[0022] The beneficial effects of this utility model are:

[0023] 1. This utility model enhances the connection stability between the plastic magnetic ring and the shaft core through the cooperation of the annular boss and the groove and the mechanical interlocking mechanism, avoids gaps caused by glue aging and failure, prevents relative rotation or axial movement between the plastic magnetic ring and the shaft core, reduces equipment vibration and noise, and avoids rotor failure.

[0024] 2. This utility model enhances the circumferential and axial constraint forces of the annular boss and annular groove through the interlocking of the hemispherical protrusion and the recess, preventing the plastic magnetic ring from sliding along the shaft core, avoiding structural loosening, ensuring stable operation of the equipment, and enhancing structural stability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0027] Figure 3 This is a schematic cross-sectional view of the plastic magnetic ring of this utility model;

[0028] Figure 4 This is a schematic diagram of the cross-sectional structure of the shaft core of this utility model.

[0029] In the diagram: 1. Shaft core; 11. Annular boss; 12. Hemispherical protrusion; 2. Plastic magnetic ring; 21. Annular groove; 22. Hemispherical pit; 3. Annular reinforcing rib. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0035] Example 1:

[0036] like Figure 1-4 As shown, this utility model provides a structurally robust plastic magnetic rotor, comprising:

[0037] Shaft core 1, with multiple annular bosses 11 fixedly connected at equal intervals along the axial direction on the outer circumferential surface of the shaft core 1;

[0038] The plastic magnetic ring 2 has an annular groove 21 on its inner circumferential surface that corresponds one-to-one with the annular boss 11.

[0039] A mechanical engagement mechanism is provided between the annular boss 11 and the annular groove 21 to enhance the mechanical engagement force between the annular boss 11 and the annular groove 21, thereby improving the stability of the plastic magnetic rotor structure.

[0040] The basic mechanical connection is formed by the engagement of the annular boss 11 and the annular groove 21. The mechanical engagement mechanism further enhances the engagement depth and contact area between the two. When the rotor is running, torque and axial force can be directly transmitted through the physical engagement relationship, avoiding gaps caused by the loss of adhesion due to aging when relying on glue. At the same time, compared with a single interference fit, the force can be distributed through multiple contact points, reducing the fit attenuation under long-term high-frequency operation or load fluctuations. This effectively prevents the relative rotation and axial movement of the plastic magnetic ring 2 and the shaft core 1, maintaining structural stability.

[0041] The mechanical engagement mechanism includes: a plurality of hemispherical protrusions 12, which are equidistantly fixedly connected to both ends of the annular boss 11; and a plurality of hemispherical recesses 22, which are equidistantly opened on both sides of the inner cavity of the annular groove 21, and the plurality of hemispherical recesses 22 correspond to the positions of the plurality of hemispherical protrusions 12 and are adapted in size.

[0042] After the plastic magnetic ring 2 is assembled with the shaft core 1, the hemispherical protrusion 12 is embedded in the hemispherical recess 22. In the circumferential direction, the protrusion and the arc-shaped wall of the recess abut against each other, which can generate radial constraint force through the arc contact, preventing the plastic magnetic ring 2 from rotating relative to the shaft core 1. In the axial direction, the spherical surface of the protrusion and the side wall of the recess form an axial limit, which can directly offset the axial force and prevent the plastic magnetic ring 2 from sliding along the shaft core 1. This solves the problem of insufficient axial positioning of a single interference fit. During long-term operation, the physical interlocking structure is not prone to fatigue failure and maintains a stable constraint force.

[0043] The space between the annular boss 11 and the annular groove 21 is filled with magnetic powder adhesive.

[0044] After curing, the magnetic powder adhesive enhances the connection between the annular boss 11 and the annular groove 21 through its own adhesive force, and also utilizes the magnetic adsorption of the magnetic powder to form additional bonding force, creating a synergistic effect between the mechanical interlocking structure and the magnetic bonding. It is unaffected by changes in ambient temperature and humidity, unlike ordinary adhesives which age and fail, and it can fill the tiny gaps between the two, preventing loosening due to gaps and improving the long-term durability of the structure.

[0045] The outer circumferential surface of the plastic magnetic ring 2 is provided with annular reinforcing ribs 3 at equal intervals along the axial direction.

[0046] The annular reinforcing rib 3 can increase the radial cross-sectional stiffness of the plastic magnetic ring 2. When the rotor is running at high speed, it can resist the radial expansion deformation caused by centrifugal force, and avoid the increase of the fit clearance between the inner circumferential surface and the annular boss 11 due to deformation of the plastic magnetic ring 2. This maintains the tight fit between the two, prevents structural loosening caused by deformation of the plastic magnetic ring 2, and ensures the overall operational stability of the rotor.

[0047] The annular reinforcing rib 3 and the plastic magnetic ring 2 are integrally injection molded structures, and the cross section of the annular reinforcing rib 3 is an isosceles trapezoid.

[0048] The ring-shaped reinforcing rib 3 and the plastic magnetic ring 2 are integrated by injection molding to form a seamless whole, avoiding stress concentration points caused by assembly connection. When under force, the force can be evenly transmitted along the whole structure. The isosceles trapezoidal cross section of the reinforcing rib and the plastic magnetic ring 2 has a larger connection surface, which can disperse the radial force generated by the plastic magnetic ring 2 during operation, enhance the resistance to deformation, and ensure that the rib is not prone to breakage or deformation during long-term high-frequency operation, thus maintaining the structural integrity of the plastic magnetic ring 2.

[0049] The shaft core 1 is integrally formed with the plurality of annular bosses 11.

[0050] The integral molding structure makes the shaft core 1 and the annular boss 11 a continuous whole without any assembly gap. When transmitting torque and bearing axial force, the force can be directly transmitted from the shaft core 1 to the annular boss 11, avoiding force transmission loss or local stress concentration caused by separate connection. It also prevents relative displacement between the annular boss 11 and the shaft core 1, thereby ensuring the long-term stability of the fit accuracy between the annular boss 11 and the annular groove 21 and avoiding rotor failure caused by loose fit.

[0051] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A structurally robust plastic magnetic rotor, characterized in that, include: The shaft core (1) has multiple annular bosses (11) fixedly connected at equal intervals along the axial direction on its outer circumferential surface. Plastic magnetic ring (2), the inner circumferential surface of the plastic magnetic ring (2) is provided with an annular groove (21) corresponding to the annular boss (11). The mechanical engagement mechanism is located between the annular boss (11) and the annular groove (21) to enhance the mechanical engagement force between the annular boss (11) and the annular groove (21), thereby improving the stability of the plastic magnetic rotor structure.

2. The structurally robust plastic magnetic rotor according to claim 1, characterized in that, The mechanical engagement mechanism includes: Multiple hemispherical protrusions (12) are fixedly connected at equal intervals to both ends of the annular boss (11); Multiple hemispherical recesses (22) are equidistantly provided on both sides of the inner cavity of the annular groove (21). The multiple hemispherical recesses (22) correspond to the positions of multiple hemispherical protrusions (12) and are adapted in size.

3. A structurally robust plastic magnetic rotor according to claim 1, characterized in that, The space between the annular boss (11) and the annular groove (21) is filled with magnetic powder adhesive.

4. A structurally robust plastic magnetic rotor according to claim 1, characterized in that, The outer circumferential surface of the plastic magnetic ring (2) is provided with annular reinforcing ribs (3) at equal intervals along the axial direction.

5. A structurally robust plastic magnetic rotor according to claim 4, characterized in that, The annular reinforcing rib (3) and the plastic magnetic ring (2) are integrally injection molded structures, and the cross section of the annular reinforcing rib (3) is an isosceles trapezoid.

6. A structurally robust plastic magnetic rotor according to claim 1, characterized in that, The shaft core (1) is integrally formed with the plurality of annular bosses (11).

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