Stator assembly of an external rotor electric machine and external rotor electric machine

Abstract

The utility model discloses a kind of stator assembly of outer rotor motor and outer rotor motor, wherein, a kind of stator assembly of outer rotor motor includes stator core and fixed frame, stator core includes yoke part and multiple tooth parts, yoke part is circular ring structure, multiple tooth parts are ringed in the outside of yoke part, tooth part is set along the radial of yoke part, wire slot is equipped between two tooth parts along the circumferential of yoke part, fixed frame is worn in the inner hole of yoke part, and the both ends of yoke part are clamped.Through the above structure, on the one hand, the yoke part of stator core is optimized from traditional disc to hollow circular ring structure, the redundant silicon steel material of yoke part central region can be reduced, so that the use amount of silicon steel can be reduced, the production cost of stator assembly is reduced;On the other hand, circular ring yoke part can realize the lightweight design of stator core under the premise of guaranteeing mechanical strength, to realize the lightweight design of stator assembly even motor, so it can be beneficial to improve motor efficiency and reduce transportation cost.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a stator assembly 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, some external rotor motor stator assemblies include a connected stator core and a mounting frame. The yoke of the stator core has a disc-shaped structure (the stator core is made of multiple stacked stator laminations of silicon steel). However, through further production research, the inventors discovered that the production of the aforementioned stator core requires a large amount of silicon steel, which increases the production cost of the stator assembly and also increases the overall weight of the stator assembly. 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 stator assembly for an external rotor motor.

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

[0005] According to a first aspect of the present invention, a stator assembly of an external rotor motor includes a stator core and a fixing frame. The stator core includes a yoke and a plurality of teeth. The yoke has an annular structure. The plurality of teeth are arranged around the outside of the yoke. The teeth are arranged radially along the yoke. A groove is provided between two adjacent teeth along the circumference of the yoke. The fixing frame passes through the inner hole of the yoke and clamps both ends of the yoke.

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

[0007] Through the above structure, on the one hand, optimizing the yoke of the stator core from the traditional disc shape to a hollow annular structure can reduce redundant silicon steel material in the central area of ​​the yoke, thereby reducing the amount of silicon steel used and lowering the production cost of the stator assembly; on the other hand, the annular yoke can achieve lightweight design of the stator core while ensuring mechanical strength, thus enabling lightweight design of the stator assembly and even the motor, which is beneficial to improving motor energy efficiency and reducing transportation costs; furthermore, the fixing bracket passes through the inner hole of the yoke and clamps its two ends to form a double-end-face constraint structure, ensuring the deformation resistance of the annular yoke.

[0008] According to some embodiments of this utility model, it further includes two fixing plates, which are respectively located at both ends of the stator core. Each fixing plate includes a connected yoke and a tooth. The yoke abuts against the yoke portion and has a first clearance hole corresponding to the inner hole of the yoke portion. The tooth is configured as a plurality of teeth and is arranged around the outer side of the yoke. The plurality of teeth abut against the plurality of teeth portions one by one. A second clearance hole is provided between two adjacent teeth along the circumferential direction of the yoke. The plurality of second clearance holes are provided in a one-to-one correspondence with the plurality of wire grooves. The edge of the second clearance hole has an extension portion extending to the corresponding wire groove. The extension portion abuts against the groove wall of the corresponding wire groove. The fixing bracket passes through the first clearance hole and the inner hole of the yoke portion and abuts against the two yokes to clamp the two ends of the yoke portion.

[0009] According to some embodiments of the present invention, the fixing frame includes two connecting cylinders, one end of the connecting cylinder is provided with a first folded edge, and the other end is provided with a connecting plate. The connecting cylinder passes through the inner hole of the yoke, the two connecting plates abut and connect, the two first folded edges are respectively clamped at both ends of the yoke, and the connecting plate is used for the installation shaft to pass through.

[0010] According to some embodiments of the present invention, an insulating member is provided at one end of the connecting cylinder, and the insulating member is covered with the corresponding first folded edge.

[0011] According to some embodiments of the present invention, the connecting plate has a hollow first cylindrical portion in the middle, which is used for the installation shaft to pass through.

[0012] According to some embodiments of the present invention, one of the connecting plates is provided with a connecting hole, and the other connecting plate is provided with a second cylindrical portion. One end of the second cylindrical portion is provided with a second folded edge. The second cylindrical portion passes through the connecting hole, and the second folded edge and the other connecting plate together clamp one of the connecting plates.

[0013] According to some embodiments of the present invention, the second cylindrical portion has a hollow structure.

[0014] An external rotor motor according to a second aspect of the present invention includes a stator assembly 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 production costs and reduce the overall weight of the motor.

[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 stator assembly of the external rotor motor of this utility model;

[0019] Figure 2 for Figure 1 The cross-sectional view of the stator assembly shown in the image after removing an insulating component;

[0020] Figure 3 for Figure 2 A partial exploded view of the stator assembly shown;

[0021] Figure 4 for Figure 3 The diagram shows the structure of the fixing plate.

[0022] Figure label:

[0023] Stator core 100, yoke 110, tooth 120, slot 130;

[0024] Fixing frame 200, connecting cylinder 210, first folded edge 211, connecting plate 212, first cylinder 212A, connecting hole 212B, second cylinder 212C, second folded edge 212C1;

[0025] Fixed plate 300, yoke 310, first clearance hole 311, tooth 320, second clearance hole 330, extension 331;

[0026] Insulating component 400. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Reference Figures 1 to 4 This utility model provides a stator assembly for an external rotor motor, which includes a stator core 100 and a fixing frame 200.

[0032] The stator core 100 includes a yoke 110 and a plurality of teeth 120. The yoke 110 has a ring-shaped structure, and the plurality of teeth 120 are arranged around the outside of the yoke 110. The teeth 120 are arranged radially along the yoke 110. A groove 130 is provided between two adjacent teeth 120 along the circumference of the yoke 110. A fixing bracket 200 passes through the inner hole of the yoke 110 and clamps both ends of the yoke 110. The fixing bracket 200 is used for mounting shafts to pass through.

[0033] Understandably, the stator core 100 is made of multiple stator laminations made of silicon steel.

[0034] Through the above structure, on the one hand, the yoke 110 of the stator core 100 is optimized from a traditional disc shape to a hollow annular structure, which can reduce the redundant silicon steel material in the central area of ​​the yoke 110, thereby reducing the amount of silicon steel used and lowering the production cost of the stator assembly; on the other hand, the annular yoke 110 can achieve a lightweight design of the stator core 100 while ensuring mechanical strength, thereby achieving a lightweight design of the stator assembly and even the motor, which can help improve the energy efficiency of the motor and reduce transportation costs; furthermore, the fixing bracket 200 passes through the inner hole of the yoke 110 and clamps its two ends to form a double-end-face constraint structure, ensuring the deformation resistance of the annular yoke 110 and providing stable support for the mounting shaft.

[0035] In this embodiment, refer to Figures 2 to 4It also includes two fixing plates 300, which are located at both ends of the stator core 100. Each fixing plate 300 includes a connected yoke 310 and teeth 320. The yoke 310 abuts against the yoke portion 110 and has a first clearance hole 311 corresponding to the inner hole of the yoke portion 110. Multiple teeth 320 are arranged around the outside of the yoke 310, and the multiple teeth 320 abut against multiple teeth 120 in a one-to-one correspondence, circumferentially opposite each other along the yoke 310. A second clearance hole 330 is provided between two adjacent toothed plates 320. Multiple second clearance holes 330 and multiple wire grooves 130 are provided in a one-to-one correspondence. The edge of the second clearance hole 330 is provided with an extension 331 extending to the corresponding wire groove 130. The extension 331 abuts against the groove wall of the corresponding wire groove 130. The fixing bracket 200 passes through the first clearance hole 311 and the inner hole of the yoke 110, and abuts against the two yokes 310 to clamp the two ends of the yoke 110.

[0036] It is understandable that the yoke 310 has a ring-shaped structure, and the inner hole of the yoke 310 is the aforementioned first clearance hole 311.

[0037] With the above structure, on the one hand, the two fixing plates 300 respectively clamp the two ends of the stator core 100. The fixing plates 300 abut against the end face of the yoke 110 via the yoke 310 and against the end face of the toothed portion 120 via the tooth 320, thus forming a covering clamping structure to enhance the structural stability of the stator core 100. On the other hand, the extension 331 is embedded in the wire groove 130 and abuts against its groove wall (e.g., ...). Figure 4 The U-shaped extension 331 shown in the diagram can mechanically lock the side wall of the wire groove 130, reducing the working condition of deformation of the tooth 120; on the other hand, the second clearance hole 330 and the extension 331 form a clearance channel to ensure that the winding tool can enter and exit the wire groove 130 to complete the winding work.

[0038] In this embodiment, refer to Figure 2 and Figure 3 The fixing frame 200 includes two connecting cylinders 210. One end of the connecting cylinder 210 is provided with a first folded edge 211, and the other end is provided with a connecting plate 212. The connecting cylinder 210 passes through the first clearance hole 311 and the inner hole of the yoke 110. The two connecting plates 212 abut and connect. The two first folded edges 211 abut against the two yokes 310 respectively to clamp the two ends of the yoke 110. The connecting plate 212 is used for the installation shaft to pass through.

[0039] In this embodiment, refer to Figure 2 and Figure 3 An insulating element 400 is provided at one end of the connecting cylinder 210, and the insulating element 400 is covered with a corresponding first folded edge 211.

[0040] Connecting plate 212 is used for mounting shafts to pass through; for details, refer to [reference needed]. Figure 2 and Figure 3 The connecting plate 212 has a hollow first cylindrical part 212A in the middle, which is used for the installation shaft to pass through.

[0041] The two connecting plates 212 are connected. For details, please refer to [link / reference]. Figure 2 and Figure 3 One of the connecting plates 212 has a connecting hole 212B, and the other connecting plate 212 has a second cylindrical portion 212C. One end of the second cylindrical portion 212C has a second flange 212C1. The second cylindrical portion 212C passes through the connecting hole 212B, and the second flange 212C1 and the other connecting plate 212 together clamp one of the connecting plates 212. The second cylindrical portion 212C has a hollow structure.

[0042] This invention also proposes an external rotor motor, which includes the stator assembly of the aforementioned external rotor motor. This structure reduces production costs and the overall weight of the motor.

[0043] 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 stator assembly for an external rotor motor, characterized in that: include The stator core (100) includes a yoke (110) and a plurality of teeth (120). The yoke (110) has a ring-shaped structure, and the plurality of teeth (120) are arranged around the outside of the yoke (110). The teeth (120) are arranged radially along the yoke (110), and a groove (130) is provided between two adjacent teeth (120) along the circumference of the yoke (110). A fixing bracket (200) is inserted through the inner hole of the yoke (110) and clamps both ends of the yoke (110).

2. The stator assembly of an external rotor motor according to claim 1, characterized in that: It also includes two fixing plates (300), which are located at both ends of the stator core (100). Each fixing plate (300) includes a connected yoke (310) and teeth (320). The yoke (310) abuts against the yoke portion (110) and has a first clearance hole (311) corresponding to the inner hole of the yoke portion (110). The teeth (320) are arranged in multiples and are arranged around the outside of the yoke (310). 0) A second clearance hole (330) is provided between two adjacent teeth (320) along the circumferential direction of the yoke (310), and the second clearance holes (330) are provided in a one-to-one correspondence with the multiple wire grooves (130). The edge of the second clearance hole (330) is provided with an extension (331) extending to the corresponding wire groove (130), and the extension (331) abuts against the groove wall of the corresponding wire groove (130). The fixing bracket (200) passes through the first clearance hole (311) and the inner hole of the yoke (110), and abuts against the two plate yokes (310) to clamp the two ends of the yoke (110).

3. The stator assembly of an external rotor motor according to claim 1, characterized in that: The fixing frame (200) includes two connecting cylinders (210). One end of the connecting cylinder (210) is provided with a first folded edge (211), and the other end is provided with a connecting plate (212). The connecting cylinder (210) passes through the inner hole of the yoke (110). The two connecting plates (212) abut and connect. The two first folded edges (211) are respectively clamped at both ends of the yoke (110). The connecting plate (212) is used for the installation shaft to pass through.

4. The stator assembly of an external rotor motor according to claim 3, characterized in that: An insulating element (400) is provided at one end of the connecting cylinder (210), and the insulating element (400) covers the corresponding first folded edge (211).

5. The stator assembly of an external rotor motor according to claim 3, characterized in that: The connecting plate (212) has a hollow first cylindrical part (212A) in the middle, which is used for the installation shaft to pass through.

6. The stator assembly of an external rotor motor according to claim 3, characterized in that: One of the connecting plates (212) is provided with a connecting hole (212B), and the other connecting plate (212) is provided with a second cylindrical part (212C). One end of the second cylindrical part (212C) is provided with a second flange (212C1). The second cylindrical part (212C) passes through the connecting hole (212B). The second flange (212C1) and the other connecting plate (212) together clamp one of the connecting plates (212).

7. The stator assembly of an external rotor motor according to claim 6, characterized in that: The second cylindrical section (212C) has a hollow structure.

8. An external rotor motor, characterized in that: Includes a stator assembly of an external rotor motor as described in any one of claims 1-7.

Images