A fixing structure of a stator magnet of a micro motor

Abstract

The utility model relates to a kind of fixing structure of micro motor stator magnet, it includes: annular magnet, clamping installation is in magnet holder, the magnet holder and the annular magnet are installed in shell;Carbon brush cover, clamping installation is on the magnet holder.By adopting multistage mechanical cooperation to replace traditional adhesive, the quick, reliable fixation of magnet is realized, avoid the risk such as glue aging, high temperature demagnetization, and the structure stability is high.

Description

Technical Field

[0001] This utility model relates to the field of micro motor manufacturing, specifically to a fixing structure for a micro motor stator magnet. Background Technology

[0002] Driven by applications in smart homes, new energy vehicles, and industrial robots, the market demand for micromotors continues to grow. Reliable fixation of the stator magnet is one of the key processes in micromotor manufacturing.

[0003] In related technologies, adhesive bonding is commonly used to fix magnets. This process has many drawbacks: the process is complex, the glue curing time is long (some require heating and baking), and the efficiency is low; prolonged heating may cause the magnets to demagnetize, affecting the performance of the motor; in addition, adhesive bonding is not conducive to automated production, and its reliability in extreme environments poses safety hazards. Summary of the Invention

[0004] Based on the above description, this utility model provides a fixing structure for the stator magnet of a micro motor to solve the problems of complex processes, low efficiency, impact on motor performance, and potential safety hazards in related technologies.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a fixing structure for a micro motor stator magnet, comprising: an annular magnet, snapped onto a magnet holder, the magnet holder and the annular magnet being installed inside a housing; and a carbon brush cover, snapped onto the magnet holder.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the annular magnet has a groove, and the magnet holder has a protrusion that matches the groove.

[0008] Furthermore, the groove is located on the top of the annular magnet, and the protrusion is located on the bottom of the magnet holder.

[0009] Furthermore, a shielding plate is provided at the top of the groove, and a stop block is provided on one side of the protrusion.

[0010] Furthermore, the magnet holder is provided with a positioning post, and the carbon brush cover is provided with a positioning groove that matches the positioning post.

[0011] Furthermore, the positioning post is located at the top of the magnet holder, and the positioning groove is located at the bottom of the carbon brush cover.

[0012] Furthermore, the two positioning posts are spaced apart along the circumference of the magnet holder.

[0013] Furthermore, the positioning post is plate-shaped and extends along the upper end face of the magnet holder.

[0014] Furthermore, the magnet retainer is interference-fitted into the housing.

[0015] Furthermore, a magnetic positioning block is provided on the inner wall of the housing.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: By using multi-stage mechanical bonding instead of traditional adhesives, the magnets are quickly and reliably fixed, avoiding risks such as glue aging and high-temperature demagnetization, resulting in high structural stability. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the fixing structure of the micro motor stator magnet provided in the embodiment of this utility model; Figure 2 A schematic diagram of the overall structure of the micro motor stator magnet fixing structure provided in another direction for an embodiment of this utility model; Figure 3 A schematic diagram of the structure of the ring magnet provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the magnet holder provided in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the protrusions and grooves provided in an embodiment of the present utility model; Figure 6 A schematic diagram of the casing provided in an embodiment of this utility model; Figure 7 This is a schematic diagram of the structure of the carbon brush cover provided in an embodiment of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Ring magnet; 101. Groove; 102. Shielding plate; 2. Magnet retainer; 201. Protrusion; 202. Positioning post; 203. Stop block; 3. Housing; 301. Magnet positioning block; 4. Carbon brush cover; 401. Positioning groove. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0020] This utility model provides a fixing structure for the stator magnet of a micro motor, which can solve the problems of complex processes, low efficiency, impact on motor performance, and potential safety hazards in related technologies.

[0021] See Figure 1 and Figure 2 As shown in the figure, a fixing structure for a micro-motor stator magnet provided by an embodiment of this utility model includes: an annular magnet 1, snap-fitted onto a magnet holder 2, wherein the magnet holder 2 and the annular magnet 1 are installed inside a housing 3; and a carbon brush cover 4, snap-fitted onto the magnet holder 2. In this embodiment, by using multi-stage mechanical cooperation to replace traditional adhesive bonding, the fixing structure is safe and reliable, avoiding risks such as glue aging and high-temperature demagnetization. The structure has high stability, is highly efficient and convenient, and the assembly process is simple, enabling instant positioning and fixing without waiting for glue to cure or additional baking, greatly improving production efficiency. The structural design is simple, the parts are easy to manufacture, the assembly process is efficient, and it can significantly reduce production costs and is easy to automate.

[0022] In some embodiments, the outer ring of the magnet holder 2 may have a pre-reserved glue groove for glue application as an optional process, providing multiple safeguards for structural safety and further enhancing safety under extreme working conditions.

[0023] See Figure 2 and Figure 3 As shown, in some embodiments, the annular magnet 1 is provided with a groove 101, and the magnet holder 2 is provided with a protrusion 201 that matches the groove 101. The protrusion 201 is precisely engaged with the magnet groove 101 to limit the radial movement or left-right swaying between the annular magnet 1 and the magnet holder 2.

[0024] See Figure 2 and Figure 3 As shown, in some embodiments, the groove 101 is provided on the top of the annular magnet 1, and the protrusion 201 is provided on the bottom of the magnet holder 2, which facilitates assembly and enables the magnet to be quickly and reliably fixed.

[0025] See Figure 5 As shown, in some embodiments, a shielding plate 102 is provided on the top of the groove 101, and a stop block 203 is provided on one side of the protrusion 201. After the stop block 203 enters the groove 101, the shielding plate 102 plays a further limiting role, thereby achieving axial fixation of the magnet assembly.

[0026] See Figure 2 , Figure 4 and Figure 7As shown, in some embodiments, the magnet holder 2 is provided with a positioning post 202, and the carbon brush cover 4 is provided with a positioning groove 401 that matches the positioning post 202. The positioning post 202 and the corresponding positioning groove 401 at the bottom of the carbon brush cover 4 are inserted and engaged to form axial and radial limiting of the magnet assembly, thereby completing all-round fixation.

[0027] See Figure 2 and Figure 4 As shown, in some embodiments, the positioning post 202 is located on the top of the magnet holder 2, and the positioning groove 401 is located on the bottom of the carbon brush cover 4, which facilitates assembly and enables the magnet to be quickly and reliably fixed.

[0028] See Figure 6 As shown, in some embodiments, the magnet retainer 2 is interference-fitted into the housing 3, achieving initial fastening of the components and effectively preventing radial and axial movement of the magnet within the housing 3.

[0029] See Figure 4 As shown, in some embodiments, the two positioning posts 202 are arranged at circumferential intervals along the magnet holder 2, resulting in better fixing effect and higher magnet stability.

[0030] See Figure 4 As shown, in some embodiments, the positioning post 202 is plate-shaped and extends along the upper end face of the magnet holder 2, further reducing the swaying of the magnet holder 2.

[0031] See Figure 6 As shown, in some embodiments, a magnet positioning block 301 is provided on the inner side wall of the housing 3, which can press the assembled magnet and the retainer into the housing 3 as a whole into the magnet positioning block 301, so as to achieve quick and reliable fixation of the magnet.

[0032] During installation, first align the protrusion 201 at the lower end of the magnet holder 2 with and engage it with the groove 101 at the upper end of the annular magnet 1, completing the radial pre-positioning of both. Then, press the assembled magnet and holder as a whole into the housing 3 to the magnet mounting position. The outer ring of the magnet holder 2 and the inner wall of the housing 3 are interference fit. Finally, install the carbon brush cover 4, inserting the two positioning pins 202 on the upper end face of the magnet holder 2 into the corresponding positioning grooves 401 at the bottom of the carbon brush cover 4, forming secondary axial and radial limiting of the magnet assembly, making the overall structure more stable and reliable.

[0033] For a higher level of fixation, a small amount of glue can be injected through the glue inlet groove reserved on the outer ring of the magnet retainer 2 for a third reinforcement.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0035] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0036] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0037] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixing structure for a stator magnet of a micro motor, characterized in that, It includes: A ring magnet (1) is snapped into a magnet holder (2), and the magnet holder (2) and the ring magnet (1) are installed inside the housing (3); The carbon brush cover (4) is snapped onto the magnet holder (2).

2. The fixing structure for the stator magnet of the micro-motor according to claim 1, characterized in that: The annular magnet (1) has a groove (101), and the magnet holder (2) has a protrusion (201) that matches the groove (101).

3. The fixing structure for the micro-motor stator magnet according to claim 2, characterized in that: The groove (101) is located on the top of the annular magnet (1), and the protrusion (201) is located on the bottom of the magnet holder (2).

4. The fixing structure for the micro-motor stator magnet according to claim 3, characterized in that: The top of the groove (101) is provided with a shield (102), and the side of the protrusion (201) is provided with a stop (203).

5. The fixing structure for the stator magnet of the micro-motor according to claim 1, characterized in that: The magnet holder (2) is provided with a positioning post (202), and the carbon brush cover (4) is provided with a positioning groove (401) that matches the positioning post (202).

6. The fixing structure for the stator magnet of the micro-motor according to claim 5, characterized in that: The positioning post (202) is located at the top of the magnet holder (2), and the positioning groove (401) is located at the bottom of the carbon brush cover (4).

7. The fixing structure for the micro-motor stator magnet according to claim 6, characterized in that: The two positioning posts (202) are spaced apart along the circumference of the magnet holder (2).

8. The fixing structure for the micro-motor stator magnet according to claim 7, characterized in that: The positioning post (202) is plate-shaped and extends along the upper end face of the magnet holder (2).

9. The fixing structure for the stator magnet of the micro-motor according to claim 1, characterized in that: The magnet holder (2) is interference-fitted into the housing (3).

10. The fixing structure for the stator magnet of the micro-motor according to claim 1, characterized in that: The inner wall of the housing (3) is provided with a magnetic positioning block (301).

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