A motor housing, an outer rotor motor and a fan

Abstract

The utility model discloses a motor shell, outer rotor motor and fan, wherein, a kind of motor shell includes cylinder shell and cover plate, cylinder shell is hollow cylinder structure, cover plate is set to two and respectively detachably set in the both ends of cylinder shell, cover plate is equipped with the through-hole being communicated with the inner chamber of cylinder shell, two through-holes are oppositely arranged and its axis all coincide with the axis of cylinder shell, at least one cover plate integrally formed with extension, and extension is used to be connected with fan blade. Through the above structure, integrally formed with extension on at least one cover plate, so that the extension directly undertakes the function of being connected with fan blade (replaces traditional split type leaf fork disc). Therefore, in the process of assembling fan, the part cost of independent leaf fork disc can be saved, while reducing assembly process and reducing assembly cost, so that the production cost of fan can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor equipment technology, and in particular to a motor housing, an external rotor motor, and a fan. Background Technology

[0002] External rotor motors are widely used not only in home appliances like fans but also in industrial automation and many other fields. To address the drawbacks of traditional two-part motor housings (comprising a cylindrical shell and a cover shell), such as the limitation that maintenance is restricted to only one end of the cover shell, the inventors designed a modular motor housing for easier production. However, further research revealed that the aforementioned motor housing, acting as the rotor, requires an additional blade fork to connect with the fan blades during fan assembly. This additional blade fork increases component and assembly costs, thus raising the overall production cost of the fan. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a motor housing.

[0004] This utility model also proposes an external rotor motor having the motor housing.

[0005] This utility model further proposes a fan having the external rotor motor.

[0006] According to a first aspect of the present invention, a motor housing includes a cylindrical shell and a cover plate. The cylindrical shell has a hollow cylindrical structure. Two cover plates are provided and are detachably disposed at both ends of the cylindrical shell. Each cover plate has a through hole communicating with the inner cavity of the cylindrical shell. The two through holes are arranged opposite to each other and their axes coincide with the axis of the cylindrical shell. At least one cover plate is integrally formed with an extension portion for connecting to a fan blade.

[0007] A motor housing according to an embodiment of the present utility model has at least the following beneficial effects:

[0008] With the above structure, on the one hand, an extension is integrally formed on at least one cover plate, allowing this extension to directly connect with the fan blades (replacing the traditional split blade fork disc). Therefore, during fan assembly, the cost of a separate blade fork disc can be eliminated, while reducing assembly steps and costs, thus lowering fan production costs. On the other hand, this application retains a three-part motor housing design, allowing the external rotor motor to be opened for maintenance from either end (or both ends simultaneously), overcoming the limitation of traditional two-part motor housings that can only be opened from one end for maintenance. Furthermore, the cylindrical housing structure reduces the complexity of its stamping or casting molds compared to traditional housing molds, thereby lowering mold design costs and motor housing production costs.

[0009] According to some embodiments of the present invention, the extension is disposed on the periphery of the corresponding cover plate.

[0010] According to some embodiments of the present invention, the extension portion has an annular plate-like structure.

[0011] According to some embodiments of the present invention, the cylindrical shell is provided with a first hole, the cover plate is provided with a second hole, and fasteners are provided through the first hole and two second holes located on different cover plates, so that the two cover plates are respectively detachably provided at both ends of the cylindrical shell.

[0012] According to some embodiments of the present invention, the cover plate is provided with at least two stop blocks, and the at least two stop blocks are arranged around the axis of the through hole on the same cover plate. The at least two stop blocks on the same cover plate abut against the inner wall of the cylinder shell to position the cover plate so that the axis of the through hole on the cover plate coincides with the axis of the cylinder shell.

[0013] According to some embodiments of the present invention, the cover plate is stamped with the stop block.

[0014] An external rotor motor according to a second aspect embodiment of the present invention includes a motor housing as described above.

[0015] The external rotor motor according to the present invention has at least the following beneficial effects: through the above structure, the cost of the independent blade fork disc can be eliminated during the assembly of the fan, and the assembly process can be reduced to lower the assembly cost, thereby reducing the production cost of the fan.

[0016] The fan according to a third aspect of the present invention includes an external rotor motor as described above.

[0017] The fan according to the present invention has at least the following beneficial effects: through the above structure, the cost of the independent blade fork disc can be eliminated during the assembly process of the fan, and the assembly process is reduced to lower the assembly cost, thereby reducing the production cost of the fan.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a structural diagram of an embodiment of the external rotor motor of this utility model;

[0021] Figure 2 for Figure 1 A partial exploded view of the external rotor motor shown;

[0022] Figure 3 for Figure 1 The diagram shows the structure of the external rotor motor connected to the fan blades.

[0023] Figure label:

[0024] Cylinder shell 100, first hole 110;

[0025] Cover plate 200, through hole 210, extension 220, second hole 230, stop block 240;

[0026] Fan blades 300;

[0027] Stator 400, connecting shaft 410. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In the description of this utility model, the use of terms such as first, second, third, fourth, and fifth is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0031] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Reference Figures 1 to 3 This utility model provides a motor housing, which includes a cylindrical shell 100 and a cover plate 200. The cylindrical shell 100 has a hollow cylindrical structure. There are two cover plates 200, which are detachably disposed at both ends of the cylindrical shell 100. The cover plate 200 has a through hole 210 communicating with the inner cavity of the cylindrical shell 100. The two through holes 210 are arranged opposite to each other and their axes coincide with the axis of the cylindrical shell 100. One of the cover plates 200 is integrally formed with an extension 220, which is used to connect with a fan blade 300.

[0033] Understandably, the through hole 210 is provided for the connecting shaft 410 of the stator 400 of the external rotor motor to pass through.

[0034] With the above structure, on the one hand, an extension 220 is integrally formed on one of the cover plates 200, allowing the extension 220 to directly connect with the fan blades 300 (replacing the traditional split blade fork disc). Therefore, during fan assembly, the cost of the independent blade fork disc can be eliminated, and assembly steps can be reduced to lower assembly costs, thereby reducing the production cost of the fan. On the other hand, this application retains the three-part motor housing design, allowing the external rotor motor to be opened for maintenance from either end (or both ends simultaneously), thus overcoming the limitation of traditional two-part motor housings that can only be opened for maintenance from one end. Furthermore, the cylindrical housing 100 adopts a cylindrical structure, and the complexity of its stamping or casting molds is far lower than the complexity of molds for producing traditional cylindrical housing 100, thereby reducing mold design costs and the production cost of the motor housing.

[0035] In this embodiment, refer to Figure 1 and Figure 2The extension 220 is disposed on the periphery of the corresponding cover plate 200, and the extension 220 has an annular plate structure. The cover plate 200 body and the extension 220 can be integrally formed by stamping.

[0036] In some embodiments, the extension 220 is disposed on the periphery of the corresponding cover plate 200, and the extension 220 is configured as at least three and all of them are protrusion structures. The at least three extensions 220 are evenly spaced along the circumference of the corresponding cover plate 200, and the at least three extensions 220 are used to provide fan blades 300 one to one.

[0037] Two cover plates 200 are detachably mounted at both ends of the cylindrical shell 100. For details, refer to... Figure 1 and Figure 2 The cylindrical shell 100 has a first hole 110, and the cover plate 200 has a second hole 230. Fasteners are inserted through the first hole 110 and the two second holes 230 located on different cover plates 200, so that the two cover plates 200 are detachably mounted on both ends of the cylindrical shell 100. The fasteners can be configured as bolt and nut assemblies, that is, including a bolt and a nut. The shank of the bolt passes through the first hole 110 and the two second holes 230 located on different cover plates 200. The head of the bolt and the nut respectively abut against the two cover plates 200 to clamp the two cover plates 200 on both ends of the cylindrical shell 100.

[0038] In this embodiment, refer to Figure 1 and Figure 2 The cover plate 200 is formed by stamping and has five stop blocks 240. The five stop blocks 240 are arranged around the axis of the through hole 210 on the same cover plate 200. The five stop blocks 240 on the same cover plate 200 abut against the inner wall of the cylinder shell 100 to position the cover plate 200 so that the axis of the through hole 210 on the cover plate 200 coincides with the axis of the cylinder shell 100.

[0039] With the above structure, on the one hand, the five stop blocks 240 are evenly arranged around the axis of the through hole 210, which together form a "discrete positioning ring" and make multiple contacts with the inner wall of the cylinder shell 100 to forcibly constrain the radial displacement of the cover plate 200, so as to ensure the coaxial accuracy of the cover plate 200 and the cylinder shell 100; on the other hand, the stop block 240 is a small protrusion structure, which is realized by simple stamping and does not require high-cost precision machining.

[0040] In some embodiments, the cover plate 200 is stamped with four stop blocks 240, and the four stop blocks 240 are arranged around the axis of the through hole 210 on the same cover plate 200.

[0041] In some embodiments, the cover plate 200 is provided with a stop block 240, which is annular and abuts against the inner wall of the shell 100 to position the cover plate 200 so that the axis of the through hole 210 on the cover plate 200 coincides with the axis of the shell 100.

[0042] This invention also proposes an external rotor motor, which includes the aforementioned motor housing. With this structure, the cost of an independent blade fork disc can be eliminated during fan assembly, while reducing assembly steps and costs, thereby lowering the fan's production cost.

[0043] This utility model further proposes a fan that includes the aforementioned external rotor motor. Through the above structure, the cost of independent blade fork discs can be eliminated during the assembly process of the fan, while reducing assembly steps and lowering assembly costs, thereby reducing the production cost of the fan.

[0044] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A motor housing, characterized in that: The device includes a shell (100) and a cover plate (200). The shell (100) is a hollow cylindrical structure. There are two cover plates (200) which are detachably disposed at both ends of the shell (100). The cover plate (200) has a through hole (210) communicating with the inner cavity of the shell (100). The two through holes (210) are arranged opposite to each other and their axes coincide with the axis of the shell (100). At least one cover plate (200) is integrally formed with an extension (220) for connecting with a fan blade (300).

2. The motor housing according to claim 1, characterized in that: The extension (220) is provided on the periphery of the corresponding cover plate (200).

3. The motor housing according to claim 2, characterized in that: The extension (220) has an annular plate-like structure.

4. The motor housing according to claim 1, characterized in that: The cylindrical shell (100) is provided with a first hole (110), and the cover plate (200) is provided with a second hole (230). Fasteners are provided through the first hole (110) and the two second holes (230) located on different cover plates (200) so that the two cover plates (200) are respectively detachably provided at both ends of the cylindrical shell (100).

5. A motor housing according to claim 1, characterized in that: The cover plate (200) is provided with at least two stop blocks (240). The at least two stop blocks (240) are arranged around the axis of the through hole (210) on the same cover plate (200). The at least two stop blocks (240) on the same cover plate (200) abut against the inner wall of the cylindrical shell (100) to position the cover plate (200) so that the axis of the through hole (210) on the cover plate (200) coincides with the axis of the cylindrical shell (100).

6. The motor housing according to claim 5, characterized in that: The cover plate (200) is stamped with the stop block (240).

7. An external rotor motor, characterized in that: Includes a motor housing as described in any one of claims 1-6.

8. A fan, characterized in that: Including an external rotor motor as described in claim 7.

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