Brushless outer rotor motor magnet fixing structure

Abstract

The utility model relates to a brushless outer rotor motor magnet fixing structure which comprises a machine shell, a magnet is arranged in the machine shell, a fixing step is arranged on the machine shell, one end of the magnet abuts against the fixing step, and a magnetic shoe clamp assembly used for fixing the magnet on the inner wall of the machine shell is further arranged in the machine shell. The magnetic shoe clamping assembly comprises at least one magnetic shoe clamping piece arranged in the axial direction of the machine shell, the end of the magnetic shoe clamping piece abuts against the magnet, a positioning hole is formed in the connecting position of the magnetic shoe clamping piece and the inner wall of the machine shell, a positioning rod is arranged at the position, corresponding to the magnetic shoe clamping piece, of the fixing step, and the end of the positioning rod is embedded into the positioning hole. According to the utility model, through the arrangement of the fixed step and the magnetic shoe assembly, the magnet can be rapidly fixed in the casing, the consistency of the magnet position is facilitated, and compared with gluing fixation, the magnet is firmer and is not easy to fall off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brushless motor, in particular to a brushless outer rotor motor magnet fixing structure. BACKGROUND

[0002] Motor refers to a kind of electromagnetic device that realizes the conversion or transmission of electric energy by electromagnetic induction law, or changes one form of electric energy into another form of electric energy.Electric motor is to convert electric energy into mechanical energy, and the main function of electric motor is to generate driving torque, as the power source of electric appliance or various machinery.

[0003] In the traditional brushless outer rotor motor, the magnet is fixed by gluing, which is not conducive to the fixation of the magnet, the position of the magnet is not easy to fix and the consistency is poor, the glue is easy to age, the magnet falls off, and the service life of the motor is reduced. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide a brushless outer rotor motor magnet fixing structure to overcome the defects mentioned in the background art.

[0005] The brushless outer rotor motor magnet fixing structure comprises a shell, a magnet is arranged in the shell, the shell is provided with a fixing step, one end of the magnet is in abutment with the fixing step, and a magnet shoe clamp assembly for fixing the magnet on the inner wall of the shell is further arranged in the shell, the magnet shoe clamp assembly comprises at least one magnet shoe clamp piece arranged in the axial direction of the shell, the end of the magnet shoe clamp piece is in abutment with the magnet, a positioning hole is arranged at the connection position of the magnet shoe clamp piece and the inner wall of the shell, a positioning rod is arranged at the position corresponding to the magnet shoe clamp piece of the fixing step, and the end of the positioning rod is embedded in the positioning hole.

[0006] As a preferred embodiment of the brushless outer rotor motor magnet fixing structure in the present application, the magnet shoe clamp piece comprises an abutment portion arranged in abutment with the inner wall of the shell, support portions are arranged at both ends of the abutment portion, the support portions are in abutment with the end of the magnet, and the abutment portion and the support portions are connected with each other through a transition portion.

[0007] As a preferred embodiment of the brushless outer rotor motor magnet fixing structure in the present application, the end of the magnet is provided with a chamfer matched with the support portion.

[0008] As a preferred embodiment of the brushless outer rotor motor magnet fixing structure in the present application, the positioning hole is in the shape of a hemisphere, and is arranged at the lower part of the abutment portion.

[0009] As a preferred embodiment of the brushless outer rotor motor magnet fixing structure in the present application, the positioning rod comprises a rod body, one end of the rod body is fixedly connected with the fixing step, and the other end of the rod body is provided with a hemispherical fixing block matched with the positioning hole.

[0010] As a preferred of the brushless outer rotor motor magnet fixing structure in the utility model, the distance between the rod body and the inner wall of the shell is same with the thickness of the abutting portion.

[0011] The utility model discloses the beneficial effects of:

[0012] The utility model discloses the layout of fixed step and magnetic tile subassembly can quickly fix the magnet to the inside of shell, and the consistency of magnet position is favorable, and compared with the more firm of gluing and fixing, and it is not easy to fall off.

[0013] The utility model discloses the layout of fixed step and magnetic tile subassembly can quickly fix the magnet to the inside of shell, and the consistency of magnet position is favorable, and compared with the more firm of gluing and fixing, and it is not easy to fall off. DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiment of the present application or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 It is the structure schematic view of fixed structure in the embodiment of the present application.

[0016] Figure 2 It is the sectional structure schematic view of fixed structure in the embodiment of the present application.

[0017] Figure 3 It is Figure 2 The enlarged structure schematic view of A in the embodiment of the present application.

[0018] Figure 4 It is the structure schematic view of magnetic tile clamp piece in the embodiment of the present application.

[0019] Figure 5 It is the structure schematic view of magnet in the embodiment of the present application.

[0020] Figure 6 It is the structure schematic view of positioning rod in the embodiment of the present application.

[0021] DRAWINGS

[0022] 1, shell;

[0023] 2, magnet;

[0024] 3, fixed step;

[0025] 4, magnetic tile clamp piece;41, abutting portion;42, support portion;43, transition portion;44, positioning hole;

[0026] 5, positioning rod; 51, rod body; 52, fixed block. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It is to be understood that the application is not limited in its application to the details set forth in the description below.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In addition, the terms "first", "second", "third" and the like are used only for descriptive purposes and should not be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0030] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] Example

[0034] This embodiment provides a brushless outer rotor motor magnet fixing structure, such as Figures 1 to 3 As shown, it includes a housing 1, in which four magnets 2 are evenly spaced. The housing 1 includes an upper portion and a lower portion connected to each other, the upper portion being in the shape of a hollow cylinder, and the lower portion being in the shape of a hollow cone. The connection between the upper and lower portions forms an inwardly protruding fixing step 3 for limiting and fixing the magnets 2. The magnetic tile clamp assembly includes four magnetic tile clamps 4, which are arranged between adjacent magnets 2. The ends of the magnetic tile clamps 4 are elastic and abut against the ends of the magnets 2 to fix the magnets 2 to the inner wall of the housing 1. The lower portion of the magnetic tile clamps 4 is provided with a positioning hole 44 at the connection between the inner wall of the housing 1. A positioning rod 5 is provided at the position corresponding to the fixing step 3 and the magnetic tile clamps 4, and the end of the positioning rod 5 is embedded in the positioning hole 44.

[0035] like Figure 4 As shown, the magnetic tile clip 4 includes an abutment portion 41, which is arc-shaped. The abutment portion 41 is arranged to abut against the inner wall of the casing 1. Support portions 42 are provided at both ends of the abutment portion 41. The support portion 42 is L-shaped. The end of the magnet 2 abuts against one limb of the support portion 42, and the other limb abuts against the interior of the casing 1. The abutment portion 41 and the support portion 42 are connected to each other through an arc-shaped transition portion 43.

[0036] like Figure 5 As shown, the end of the magnet 2 is provided with a 130-degree cut angle to facilitate matching with the limb plate of the support portion 42. This structure ensures the strength of the magnet 2 and the stability of its connection with the magnetic tile clip 4.

[0037] In the embodiment, the positioning hole 44 is semispherical, which is arranged at the lower part of the abutting part 41. Figure 6 As shown, the positioning rod 5 comprises a rod body 51, one end of which is fixedly connected with the fixed step 3, and the other end is provided with a semispherical fixed block 52 matched with the positioning hole 44. The positioning hole 44 cooperates with the positioning rod 5, so as to facilitate the fixation of the magnetic tile clamp 4 in the shell 1.

[0038] In the embodiment, the distance between the rod body 51 and the inner wall of the shell 1 is the same as the thickness of the abutting part 41, and the bottom of the abutting part 41 is provided with a slope, so as to facilitate the insertion between the rod body 51 and the shell 1.

[0039] The utility model discloses a fixed step 3 and the layout of the magnetic tile assembly, which can quickly fix the magnet 2 in the shell 1, is favorable for the consistency of the magnet position, is more firm compared with the fixed glue, and is not easy to fall off.

[0040] Embodiment 2

[0041] The difference between the embodiment and the embodiment 1 is that the lower part of the positioning hole 44 is provided with a fan-shaped guide groove, the fan-shaped center of the fan-shaped guide groove coincides with the positioning hole 44, so as to facilitate the installation of the magnetic tile clamp 4.

[0042] Embodiment 3

[0043] The difference between the embodiment and the embodiment 1 is that the inner part of the shell 1 is provided with a glue groove at the position corresponding to the magnet 2, the glue groove is filled with fixing glue, and after the installation of the magnet 2 and the magnetic tile clamp 4, the fixing glue is filled into the glue groove, which can further enhance the stability of the magnet 2 and reduce the probability of falling off.

[0044] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the description.

[0045] The above-mentioned embodiments only express several implementation manners of the application, the description is more specific and detailed, but it should not be understood as the limitation of the patent application scope. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which all belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A brushless outer rotor motor magnet fixing structure, comprising a casing, wherein a magnet is arranged in the casing, and characterized in that: The shell is provided with a fixed step, one end of the magnet abuts against the fixed step, and the shell is further provided with a magnet tile clamp assembly for fixing the magnet on the inner wall of the shell, the magnet tile clamp assembly comprises at least one magnet tile clamp piece arranged axially along the shell, the end of the magnet tile clamp piece abuts against the magnet, the connection between the magnet tile clamp piece and the inner wall of the shell is provided with a positioning hole, and the fixed step is provided with a positioning rod at a position corresponding to the magnet tile clamp piece, and the end of the positioning rod is embedded into the positioning hole. ​ 2. The brushless outer rotor motor magnet fixing structure according to claim 1, characterized by, The magnet tile clamp piece comprises an abutting portion which abuts against the inner wall of the shell, both ends of the abutting portion are provided with support portions, the support portions abut against the end of the magnet, and the abutting portion and the support portion are connected with each other through a transition portion.

3. The brushless outer rotor motor magnet fixing structure according to claim 1, characterized by, The end of the magnet is provided with a chamfered corner matched with the support portion.

4. The brushless outer rotor motor magnet fixing structure according to claim 1, characterized by, The positioning hole is in a semispherical shape and is arranged at the lower part of the abutting portion.

5. The brushless outer rotor motor magnet fixing structure according to claim 1, characterized by, The positioning rod comprises a rod body, one end of the rod body is fixedly connected with the fixed step, and the other end of the rod body is provided with a semispherical fixing block matched with the positioning hole.

6. The brushless outer rotor motor magnet fixing structure according to claim 5, characterized by The spacing between the rod body and the inner wall of the shell is the same as the thickness of the abutting portion.

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