A magnet baffle device for an electric motor rotor

Abstract

This application discloses a magnetic baffle device for a motor rotor, belonging to the field of motor rotor technology. It mainly includes: a rotor and a rotating shaft penetrating the rotor's inner cavity; a magnetic baffle assembly is provided on the outer surface of the rotor. By fixing all the crystalline magnetic steel bodies to one side of a circular plate, all the magnetic steel bodies can be simultaneously installed and fixed in the magnetic steel track. The outer surface of the magnetic steel bodies is exposed, increasing the heat conduction area and thus improving heat transfer efficiency. This makes installation quick and solves the problem of adhesive melting at high temperatures. The magnetic steel mounting mechanism is fixed to the outer surface of the rotor body. A cylindrical heat dissipation mechanism is then installed on the outer surface of the magnetic steel mounting mechanism. Pressure is applied simultaneously to one end of the cylindrical heat dissipation mechanism and the other end of the magnetic steel mounting mechanism, causing the cylindrical heat dissipation plate to deform. This causes the snap-fit ​​protrusion to engage with the snap-fit ​​groove, forming a snap-fit ​​structure, completely fixing the magnetic steel mounting mechanism and the cylindrical heat dissipation mechanism.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor technology, specifically to a magnetic baffle device for a motor rotor. Background Technology

[0002] During motor stator operation, the energy conversion losses generated by the stator magnets cannot be dissipated in time, causing heat to accumulate in and around the magnets. This leads to an increase in magnet temperature, which can then have a reciprocating effect on motor components, resulting in even more heat generation and creating a vicious cycle. Excessive temperature can cause various harms to motor performance, lifespan, and safety. Currently, the common method for fixing magnets on the market is to apply gel to the steel surface for adhesion. However, the gel melts at high temperatures, causing the magnets to separate from the rotor. Therefore, it is necessary to improve the installation method of magnets and enhance heat dissipation efficiency.

[0003] For example, the patent with publication number CN202420693896.5 specifically discloses a magnet baffle device for a motor rotor. By setting up a fixing component, threaded hole, bolt, fixing plate, positioning strip, positioning groove, heat dissipation component, heat dissipation plate, and heat dissipation hole, it avoids the high temperature generated by the motor rotor body during rotation from evaporating the moisture in the glue, thus solving the problem of the magnet separating from the rotor during long-term rotation of the motor rotor body.

[0004] However, the above-mentioned patent still has shortcomings. For example, the heat sink of the above-mentioned patent is rectangular in shape and evenly arrayed on the outer surface, which will affect the rotor speed, causing the rotor to work under overload and damage the rotor. Moreover, each magnet body is installed and fixed independently, and the installation process is too cumbersome. Therefore, it is necessary to design a magnet baffle device for motor rotor to solve the above problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a magnet baffle device for a motor rotor, which solves the problems of the above-mentioned patent's heat sink being rectangular in shape and uniformly arrayed on the outer surface, which would affect the rotor speed, causing the rotor to overload and damage the rotor, and the installation process being too cumbersome because each magnet body is installed and fixed independently.

[0007] The technical solution adopted by this application to solve its technical problem is: a magnetic steel baffle device for an electric motor rotor, including a rotor and a rotating shaft passing through the inner cavity of the rotor, wherein a magnetic steel baffle assembly is provided on the outer surface of the rotor;

[0008] The magnetic steel baffle assembly includes a magnetic steel mounting mechanism and a cylindrical heat dissipation mechanism that engages with the outer surface of the magnetic steel mounting mechanism.

[0009] Furthermore, the rotor includes a rotor body and a magnetic steel track formed on the outer surface of the rotor body.

[0010] Furthermore, the magnet mounting mechanism includes a circular plate and magnet bodies uniformly fixed to one side of the circular plate.

[0011] Furthermore, the outer surface of the circular plate is provided with snap-fit ​​protrusions.

[0012] Furthermore, the cylindrical heat dissipation mechanism includes a cylindrical heat dissipation plate and heat dissipation holes formed on the outer surface of the cylindrical heat dissipation plate.

[0013] Furthermore, the inner wall of the cylindrical heat sink is provided with a snap-fit ​​groove evenly distributed around one end, and the snap-fit ​​protrusion and the snap-fit ​​groove are offset by 0.01 mm to 0.05 mm.

[0014] The beneficial effects of this application are as follows: The magnetic steel baffle device for a motor rotor provided by this application improves heat transfer efficiency and speeds up installation by setting up the magnetic steel body, circular plate and magnetic steel track. It solves the problem of glue melting at high temperature. The magnetic steel mounting mechanism and the cylindrical heat dissipation mechanism are completely fixed by setting up the rotor body, cylindrical heat dissipation mechanism, magnetic steel mounting mechanism, cylindrical heat dissipation plate, snap-fit ​​protrusion and snap-fit ​​groove to form a snap-fit ​​structure.

[0015] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2 This utility model Figure 1 Overall exploded view;

[0019] Figure 3 This is a three-dimensional structural diagram of the magnetic steel baffle assembly of this utility model;

[0020] Figure 4 This is a side view of the magnetic steel baffle assembly of this utility model;

[0021] Figure 5 For the present utility model Figure 4 Enlarged view of point A.

[0022] The following are the labeling elements in the figure:

[0023] 1. Rotor; 11. Rotor body; 12. Magnet rail; 2. Rotating shaft; 3. Magnet baffle assembly; 31. Magnet mounting mechanism; 311. Circular plate; 312. Magnet body; 313. Snap-fit ​​protrusion; 32. Cylindrical heat dissipation mechanism; 321. Cylindrical heat dissipation plate; 322. Heat dissipation hole; 323. Snap-fit ​​groove. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] like Figure 1 As shown, a magnetic baffle device for an electric motor rotor includes a rotor 1 and a rotating shaft 2 that passes through the inner cavity of the rotor 1. The rotor 1 rotates, causing the rotating shaft 2 to rotate. A magnetic baffle assembly 3 is provided on the outer surface of the rotor 1.

[0027] The magnet baffle assembly 3 includes a magnet mounting mechanism 31 and a cylindrical heat dissipation mechanism 32 that engages with the outer surface of the magnet mounting mechanism 31. The magnet mounting mechanism 31 is configured to simplify the installation of the magnet, and the cylindrical heat dissipation mechanism 32 is configured to protect and fix the magnet mounting mechanism 31.

[0028] like Figure 2 As shown, the rotor 1 includes a rotor body 11 and a magnet rail 12 formed on the outer surface of the rotor body 11. The magnet rail 12 is configured to limit and fix the magnet mounting mechanism 31.

[0029] like Figure 2 and Figure 3 As shown, the magnet mounting mechanism 31 includes a circular plate 311 and magnet bodies 312 uniformly fixed on one side of the circular plate 311. The circular plate 311 is configured to fix all magnet bodies 312, so as to realize the installation of all magnet bodies 312 at one time.

[0030] like Figure 4 and Figure 5 As shown, the outer surface of the circular plate 311 is provided with a snap-fit ​​protrusion 313. The snap-fit ​​protrusion 313 is provided to form a snap-fit ​​structure between the magnet mounting mechanism 31 and the cylindrical heat dissipation mechanism 32, thereby fixing the magnet mounting mechanism 31 and the cylindrical heat dissipation mechanism 32.

[0031] The cylindrical heat dissipation mechanism 32 includes a cylindrical heat dissipation plate 321 and heat dissipation holes 322 opened on the outer surface of the cylindrical heat dissipation plate 321. The cylindrical heat dissipation plate 321 is configured to absorb the heat generated by the magnet body 312 and increase the heat dissipation area. At the same time, the heat dissipation holes 322 can also promote the loss of heat.

[0032] In this application, by fixing all the crystal magnet bodies 312 on one side of the circular plate 32, and the inner diameter of the magnet track 12 being the same as the outer diameter of the magnet body 312, all the magnet bodies 312 can be installed and fixed in the magnet track 12 at the same time. The outer surface of the magnet body 312 is exposed, which increases the heat conduction area and thus makes the heat transfer efficiency higher. This makes the installation quick and solves the problem of glue melting at high temperatures.

[0033] like Figure 5 As shown, a snap-fit ​​groove 323 is evenly provided around one end of the inner wall of the cylindrical heat sink 321. The snap-fit ​​groove 323 is configured to form a snap-fit ​​structure with the snap-fit ​​protrusion 313, thereby fixing the cylindrical heat sink mechanism 32 and the magnet mounting mechanism 31 together. The magnet body 312 is inserted into the inner side of the cylindrical heat sink 321. The snap-fit ​​protrusion 313 and the snap-fit ​​groove 323 are misaligned by 0.01 mm to 0.05 mm, so that when the magnet body 312 is installed with the cylindrical heat sink 321, one end of the cylindrical heat sink 321 will deform within the range of 0.01 to 0.05 mm, so that the snap-fit ​​protrusion 313 is tightly snapped into the inner cavity of the snap-fit ​​groove 323.

[0034] In this application, by setting the overall shape of the cylindrical heat dissipation mechanism 32 to be cylindrical, the resistance encountered by the rotor during rotation is reduced. The magnet body 312 is inserted into the magnet track 12, and the magnet mounting mechanism 31 is fixed to the outer surface of the rotor body 11. The cylindrical heat dissipation mechanism 32 is then installed on the outer surface of the magnet mounting mechanism 31. Pressure is applied to one end of the cylindrical heat dissipation mechanism 32 and the other end of the magnet mounting mechanism 31 at the same time, causing the cylindrical heat dissipation plate 322 to deform. This causes the snap-fit ​​protrusion 313 to snap into the snap-fit ​​groove 323 to form a snap-fit ​​structure, thus completely fixing the magnet mounting mechanism 31 and the cylindrical heat dissipation mechanism 32.

[0035] In summary: the arrangement of the magnet body 312, the circular plate 311, and the magnet track 12 improves heat transfer efficiency and speeds up installation, solving the problem of glue melting at high temperatures. The rotor body 11, the cylindrical heat dissipation mechanism 32, the magnet mounting mechanism 31, the cylindrical heat dissipation plate 321, the snap-fit ​​protrusion 313, and the snap-fit ​​groove 323 form a snap-fit ​​structure, which completely fixes the magnet mounting mechanism and the cylindrical heat dissipation mechanism.

[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A magnet baffle device for an electric motor rotor, comprising a rotor (1) and a rotating shaft (2) penetrating the inner cavity of the rotor (1), characterized in that: The outer surface of the rotor (1) is provided with a magnetic steel baffle assembly (3); The magnetic steel baffle assembly (3) includes a magnetic steel mounting mechanism (31) and a cylindrical heat dissipation mechanism (32) that engages with the outer surface of the magnetic steel mounting mechanism (31).

2. The magnet baffle device for a motor rotor according to claim 1, characterized in that: The rotor (1) includes a rotor body (11) and a magnetic steel track (12) formed on the outer surface of the rotor body (11).

3. The magnet baffle device for a motor rotor according to claim 1, characterized in that: The magnet mounting mechanism (31) includes a circular plate (311) and a magnet body (312) uniformly fixed to one side of the circular plate (311).

4. The magnet baffle device for a motor rotor according to claim 3, characterized in that: A snap-fit ​​protrusion (313) is fixedly installed on the outer surface of the circular plate (311).

5. The magnet baffle device for a motor rotor according to claim 1, characterized in that: The cylindrical heat dissipation mechanism (32) includes a cylindrical heat dissipation plate (321) and heat dissipation holes (322) opened on the outer surface of the cylindrical heat dissipation plate (321).

6. The magnet baffle device for a motor rotor according to claim 5, characterized in that: The cylindrical heat sink (321) has a snap-fit ​​groove (323) evenly distributed around one end of its inner wall. The snap-fit ​​protrusion (313) and the snap-fit ​​groove (323) are offset by 0.01 mm to 0.05 mm.

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