A housing of an outer rotor motor and an outer rotor motor

Abstract

The utility model discloses a kind of shell of outer rotor motor and outer rotor motor, wherein, a kind of shell of outer rotor motor includes cylinder shell and cover plate, cylinder shell is hollow cylinder structure, the inner cylinder wall of cylinder shell is used for magnet adsorption, cover plate is set to two and respectively detachably set in the both ends of cylinder shell, cover plate is provided with the through hole being communicated with the inner cavity of cylinder shell, two through holes are oppositely arranged and its axis all coincide with the axis of cylinder shell. Through the above structure, on the one hand, by setting detachable cover plate at the both ends of shell, motor can be opened from any one end (or two ends simultaneously) Cover and maintain, therefore, the limitation problem that traditional two-part shell can only be single-end opened cover and maintained can be solved;On the other hand, the structure of two end cover plates is same, so a set of mould can be shared in production, therefore, mould type and development cost can be reduced;On the other hand, cylinder shell adopts cylinder structure, and the complexity of its stamping or casting mould is far lower than the complexity of producing traditional cylinder shell mould.

Description

Technical Field

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

[0002] External rotor motors are widely used not only in ceiling fans and other household appliances but also in industrial automation and many other fields. In existing technologies, the rotor housing of an external rotor motor is integrally formed through casting or forging. While this method ensures the integrity and rigidity of the housing structure, it still suffers from significant drawbacks such as complex manufacturing and high cost. To address this, a two-part housing design has emerged (referring to a housing comprising a cylindrical shell and a cover shell, such as the housing 1 and top cover 2 shown in CN203339825U, a DC motor for decorative ceiling fans). However, further research by the inventors revealed the following problems with the aforementioned two-part housing design: 1. The motor can only be inspected and repaired by opening the cover shell at one end, thus limiting maintenance capabilities; 2. The cylindrical shell and cover shell have varying and complex shapes, resulting in complex molds used in the production process and high mold investment costs (design costs), which affect production costs. 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 housing for an external rotor motor.

[0004] This utility model also proposes an external rotor motor having the outer casing of the external rotor motor.

[0005] According to a first aspect of the present invention, an outer casing of an external rotor motor includes a cylindrical shell and a cover plate. The cylindrical shell has a hollow cylindrical structure, and the inner wall of the cylindrical shell is used for magnetic attraction. The cover plate is provided in two parts and is detachably disposed at both ends of the cylindrical shell. The 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.

[0006] The housing of an external rotor motor according to an embodiment of the present invention has at least the following beneficial effects:

[0007] With the above structure, on the one hand, by setting detachable cover plates at both ends of the outer shell, the motor can be maintained from either end (or both ends simultaneously). Therefore, it can solve the limitation of traditional two-part outer shells that can only be maintained from one end, and improve the flexibility and convenience of motor maintenance. On the other hand, the cover plates at both ends have the same structure, so they can share a set of molds for production, thus reducing the types of molds and development costs. Furthermore, the cylindrical shell adopts a cylindrical structure, and the complexity of its stamping or casting molds is much lower than that of traditional cylindrical shell molds. Therefore, it can reduce mold investment costs (design costs) and reduce production costs.

[0008] 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.

[0009] According to some embodiments of the present invention, at least two of the stop block rings are evenly arranged along the axis of the through hole on the same cover plate.

[0010] According to some embodiments of the present invention, the cover plate is provided with a stop block, the stop block is in the form of a ring, the stop block abuts 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.

[0011] According to some embodiments of the present invention, the cover plate is stamped with the stop block.

[0012] According to some embodiments of this utility model, the thickness of the cylindrical shell is H, wherein 4mm≤H≤10mm.

[0013] According to some embodiments of the present invention, the end of the cylindrical shell is provided with a first hole, the cover plate is provided with a second hole, and fasteners are inserted through the first hole and the second hole to make the cover plate and the cylindrical shell detachably connected.

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

[0015] The external rotor motor according to the embodiments of the present invention has at least the following beneficial effects: the above structure can reduce the limitations of maintenance and reduce production costs.

[0016] 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

[0017] 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:

[0018] Figure 1 This is a structural diagram of an embodiment of the external rotor motor of this utility model;

[0019] Figure 2 for Figure 1 A cross-sectional view of the external rotor motor shown;

[0020] Figure 3 for Figure 1 The diagram shows a partial exploded view of the housing of the external rotor motor.

[0021] Figure label:

[0022] Cylinder shell 100, first hole 110;

[0023] Cover plate 200, through hole 210, stop block 220, second hole 230;

[0024] Stator 300, connecting shaft 310. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Reference Figures 1 to 3 This utility model provides an outer casing for an external rotor motor, comprising a cylindrical shell 100 and a cover plate 200. The cylindrical shell 100 has a hollow cylindrical structure, and the inner wall of the cylindrical shell 100 is used for magnet adsorption. The cover plate 200 is provided in two 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.

[0030] It is understandable that the through hole 210 is provided for the connecting shaft 310 of the stator 300 of the power supply motor to pass through.

[0031] It is understandable that due to production and assembly errors, the coincidence of axes includes situations where two axes are parallel or nearly parallel to each other, and the distance between the two axes is within the preset error range.

[0032] With the above structure, on the one hand, by setting detachable cover plates 200 at both ends of the outer shell, the motor can be maintained from either end (or both ends simultaneously). Therefore, it can solve the limitation of traditional two-part outer shells that can only be maintained from one end, and improve the flexibility and convenience of motor maintenance. On the other hand, the structures of the cover plates 200 at both ends are the same, so they can be produced using a single set of molds, thus reducing the types of molds and development costs. Furthermore, the cylindrical shell 100 adopts a cylindrical structure, and the complexity of its stamping or casting molds is much lower than that of traditional cylindrical shell molds. Therefore, it can reduce mold investment costs (design costs) and reduce production costs.

[0033] In this embodiment, refer to Figure 2 and Figure 3 The cover plate 200 is formed by stamping and has five stop blocks 220. The five stop blocks 220 are evenly arranged around the axis of the through hole 210 on the same cover plate 200. The five stop blocks 220 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.

[0034] With the above structure, on the one hand, the five stop blocks 220 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 220 is a small protrusion structure, which is realized by simple stamping and does not require high-cost precision machining.

[0035] In some embodiments, the cover plate 200 is stamped with three stop blocks 220, and the three stop blocks 220 are arranged around the axis of the through hole 210 on the same cover plate 200.

[0036] In some embodiments, the cover plate 200 is provided with a stop block 220, 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.

[0037] In this embodiment, the thickness of the shell 100 is H, where H = 5.8 mm, in order to effectively reduce the occurrence of magnetic leakage.

[0038] In some embodiments, H = 6.8 mm.

[0039] The cover plate 200 is detachably disposed at the end of the cylindrical shell 100, as detailed in the following document. Figure 3 The end of 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 inserted through the first hole 110 and the second hole 230 to allow the cover plate 200 and the cylindrical shell 100 to be detachably connected. The first hole 110 is a threaded hole, the second hole 230 is a through hole, and the fasteners are bolts.

[0040] This invention also proposes an external rotor motor, which includes the aforementioned housing of the external rotor motor. This structure reduces maintenance limitations and lowers production costs.

[0041] 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 housing for an external rotor motor, characterized in that: The device includes a shell (100) and a cover plate (200). The shell (100) is a hollow cylindrical structure. The inner wall of the shell (100) is used for magnet adsorption. There are two cover plates (200) which are detachably provided at both ends of the shell (100). The cover plate (200) is provided with 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).

2. The housing of an external rotor motor according to claim 1, characterized in that: The cover plate (200) is provided with at least two stop blocks (220). The at least two stop blocks (220) are arranged around the axis of the through hole (210) on the same cover plate (200). The at least two stop blocks (220) 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).

3. The housing of an external rotor motor according to claim 2, characterized in that: At least two of the stop blocks (220) are evenly arranged around the axis of the through hole (210) on the same cover plate (200).

4. The housing of an external rotor motor according to claim 1, characterized in that: The cover plate (200) is provided with a stop block (220), which has an annular structure. The stop block (220) abuts 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).

5. The housing of an external rotor motor according to claim 2 or 4, characterized in that: The cover plate (200) is stamped with the stop block (220).

6. The housing of an external rotor motor according to claim 1, characterized in that: The thickness of the cylindrical shell (100) is H, where 4mm≤H≤10mm.

7. The housing of an external rotor motor according to claim 1, characterized in that: The end of 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 inserted through the first hole (110) and the second hole (230) to allow the cover plate (200) and the cylindrical shell (100) to be detachably connected.

8. An external rotor motor, characterized in that: The housing of an external rotor motor as described in any one of claims 1-7.

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