External rotor motor

Abstract

The utility model discloses an external rotor motor, and belongs to the technical field of motors, the external rotor motor comprises a transmission member, an outer sleeve, a stator and a rotor, the rotor sleeves the periphery of the stator, the outer sleeve sleeves the circumferential surface of the rotor, a plurality of fan blades are regularly distributed on the circumferential surface of the outer sleeve, the transmission member comprises a shaft sleeve and a disc member, and the shaft sleeve sleeves the disc member. The shaft sleeve is located at the central axis of the stator, the disc piece is located at one end of the shaft sleeve and the rotor, the disc piece and the shaft sleeve are integrally formed, the disc is fixedly connected with the rotor, and the rotor rotates to drive the transmission piece and the fan to rotate synchronously. The structural design of the motor is optimized, the heat dissipation performance of a product is improved, and the motor has good torque.

Description

Technical Field

[0001] The present application relates to the technical field of electric machinery, and particularly to an outer rotor motor. Background Art

[0002] An electric machinery, commonly known as a motor, is an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. An electric machinery generally includes a stator and a rotor. The stator includes laminated cores and coil windings wound around the laminated cores. The rotor includes a rotating shaft and a rotor core sleeved on the rotating shaft, and permanent magnets are provided on the outer edge of the rotor core. The main function of the electric machinery in a circuit is to generate a driving torque and serve as a power source for electrical appliances or various machines.

[0003] The motor rotor is divided into two types: the inner rotor rotation mode and the outer rotor rotation mode. In the inner rotor rotation mode, the core in the middle of the motor is the rotating body, which outputs torque (for a motor) or receives energy (for a generator). In the outer rotor rotation mode, the outer body of the motor is the rotating body, and different modes facilitate the application in various scenarios.

[0004] Currently, the stator structure in an outer rotor motor includes an end cover, a stator core, coil windings, and an insulator. The coil windings are wound around the stator core, and insulators are installed on the coil windings exposed at both ends of the stator core. The stator with the installed insulators is then press-fitted with the end cover. Bearing chambers and screw holes are machined on the end cover. The bearing chambers are used to support the rotation of the motor, and the screw holes are used to install and fix the stator components. Related prior art such as the Chinese patent application "An Outer Rotor Motor", application number: CN201680013443.1; discloses a motor including a base, a stator assembly fixed on the base, and an outer rotor assembly rotatably buckled on the stator assembly. The lower edge of the outer rotor assembly is arranged close to the base. The stator assembly includes a core and coil windings wound around the stator core. A sealing insulation layer covers the surfaces of the stator core and the coil windings. A first dust-proof pad covering the surfaces of both the base and the outer rotor assembly is provided at the gap between the base and the outer rotor assembly.

[0005] In order to prevent the coil windings on the inner stator from overheating, the outer rotor motor also needs to be equipped with an independent fan to dissipate heat from the coil windings. This makes the volume of the outer rotor motor increase and further raises the cost of the outer rotor motor. Therefore, it has become a problem to be solved to reduce the cost of the outer rotor motor while ensuring its performance. Summary of the Utility Model

[0006] The technical problem to be solved by the present application is to provide an outer rotor motor, optimize the structural design of the motor, improve the heat dissipation performance of the product, and have good torque.

[0007] The technical solution adopted in this application is as follows: An outer-rotor motor includes a transmission member, an outer sleeve, a stator, and a rotor. The rotor is sleeved on the outer periphery of the stator, and the outer sleeve is sleeved on the circumferential surface of the rotor. A plurality of fan blades are regularly arranged on the circumferential surface of the outer sleeve. The transmission member includes a shaft sleeve and a disc member. The shaft sleeve is located at the central axis of the stator, and the disc member is located at one end of the shaft sleeve and the rotor. The disc member is integrally formed with the shaft sleeve, and the disc is fixedly connected to the rotor. The rotation of the rotor drives the transmission member and the fan to rotate synchronously.

[0008] Compared with the prior art, the advantages of this application are as follows: First, as the name implies, the shaft sleeve is used to connect to the transmission shaft to output power. In this application, the transmission shaft is integrally formed with the disc member, meeting the requirements of bonding strength and dimensional accuracy, thus simplifying the process and reducing costs. Second, in this application, the disc is designed to be fixedly connected to the rotor, thereby driving the rotation of the entire rotating member. The outer sleeve provided with fan blades is also connected to the rotor, and the rotation of the rotor drives the rotation of the fan blades. The rotating fan blades achieve heat dissipation for the equipment. In this application, the outer sleeve and the shaft sleeve are of a split structure, so that the motor can increase torque and reduce the forming difficulty of the product.

[0009] In some embodiments of this application, five fan blades are regularly arranged on the outer peripheral surface of the outer sleeve. The fan blades are of an arc-shaped sheet structure, and the fan blades penetrate the entire outer sleeve along the axial direction of the outer sleeve. The above is the preferred structural solution of this application, which can achieve good heat dissipation function. Further, the fan blades are of an arc-shaped sheet structure that bends towards the side of the disc member.

[0010] In some embodiments of this application, a plurality of air flow holes are regularly arranged on the disc member, and the air flow holes are arranged corresponding to the stator. Specifically, five air flow holes are arranged around the central axis on the disc member, and the self-rotation of the rotor forms a turbulent flow to achieve heat dissipation for the stator armature.

[0011] In some embodiments of this application, the stator includes a plurality of coil windings, an inner ring member, and a plurality of stator teeth arranged on the outer periphery of the inner ring member. The plurality of stator teeth are evenly arranged on the outer peripheral surface of the inner ring member at a predetermined interval, and the stator teeth are arranged radially along the inner ring member. The coil windings are respectively wound around the outer periphery of each stator tooth.

[0012] In some embodiments of this application, a plurality of permanent magnets are regularly installed on the inner wall surface of the rotor, and the number of permanent magnets corresponds to the number of stator teeth.

[0013] In some embodiments of this application, skeletons are provided on both end faces of the stator in its axial direction, and the coil windings are wound outside the skeletons. In this application, by adding skeletons, the enameled wire of the coil windings is not easily worn, extending the service life. At the same time, the skeletons also play a role in regularizing the coil windings.

[0014] In some embodiments of the present application, the skeleton includes an embedding frame embedded in the stator, and the embedding frame is attached to the outer wall surface of the inner ring member and the side wall surface of the stator teeth. In the present application, the stable and reliable installation of the skeleton is achieved through the embedding frame.

[0015] In some embodiments of the present application, the skeleton includes a bottom sheet, and the bottom sheet is connected to the embedding frame and is attached to the end surface of the stator teeth. That is, it has a good protective effect on the corners of the coil winding.

[0016] In some embodiments of the present application, the skeleton includes an inner retaining ring and an outer retaining piece. The inner retaining ring is arranged on the inner ring member and is higher than the bottom sheet. The outer retaining piece is arranged on the circumference of the stator teeth, and both the inner retaining ring and the outer retaining piece are higher than the bottom sheet. In the present application, through the structural arrangement of the inner retaining ring and the outer retaining piece, the coil winding is further blocked, thereby regularizing the winding of the coil winding.

[0017] On the basis of conforming to the common knowledge in the art, the above embodiments can be combined arbitrarily. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be used as a limitation to the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 Structural schematic of the present application Figure 1 ;

[0020] Figure 2 Structural schematic of the present application Figure 2 ;

[0021] Figure 3 Exploded structural schematic diagram of the present application;

[0022] Figure 4 Cross-sectional view of the present application.

[0023] Among them, the specific descriptions of the reference numerals are as follows: 1, transmission member; 11, shaft sleeve; 12, disc member; 2, outer sleeve; 3, stator; 31, coil winding; 32, inner ring member; 33, stator teeth; 4, rotor; 5, fan blade; 6, air flow hole; 7, permanent magnet; 8, skeleton; 81, embedding frame; 82, bottom sheet; 83, inner retaining ring; 84, outer retaining piece; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present application will be described in detail below in conjunction with the drawings.

[0025] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] An outer rotor motor, as shown in Embodiment 1 Figures 1 to 4 as follows: It includes a transmission member 1, an outer sleeve 2, a stator 3 and a rotor 4. The rotor 4 is sleeved on the outer periphery of the stator 3, and the outer sleeve 2 is sleeved on the circumferential surface of the rotor 4. A plurality of fan blades 5 are regularly arranged on the circumferential surface of the outer sleeve 2. The transmission member 1 includes a shaft sleeve 11 and a disc member 12. The shaft sleeve 11 is located at the central axis of the stator 3, and the disc member 12 is located at one end of the shaft sleeve 11 and the rotor 4. The disc member 12 and the shaft sleeve 11 are integrally formed to meet the bonding strength and dimensional accuracy, thereby simplifying the process and reducing costs. The disc is fixedly connected to the rotor 4, and the rotation of the rotor 4 drives the transmission member 1 and the fan to rotate synchronously. The rotating fan blades 5 achieve heat dissipation for the equipment. In the present application, the outer sleeve 2 and the shaft sleeve 11 are of a split structure, so that the motor can increase torque and reduce the molding difficulty of the product.

[0027] Embodiment 2, as Figures 1 to 3 shown, five fan blades 5 are regularly arranged on the outer peripheral surface of the outer sleeve 2. The fan blades 5 are of an arc-shaped sheet structure, and the fan blades 5 penetrate through the entire outer sleeve 2 along the axial direction of the outer sleeve 2. The above is the preferred structural solution of the present application, which can achieve good heat dissipation function. Further, the fan blades 5 are of an arc-shaped sheet structure bent towards the disc member 12.

[0028] A plurality of air flow holes 6 are regularly arranged on the disc member 12, and the air flow holes 6 are arranged corresponding to the stator 3. Specifically, five air flow holes 6 are arranged around the central axis on the disc member 12, and the self-rotation of the rotor 4 is used to form a turbulent flow to achieve heat dissipation for the armature of the stator 3.

[0029] The other contents of Embodiment 2 are the same as those of Embodiment 1.

[0030] Embodiment 3, as Figures 1 to 3 shown, the stator 3 includes a plurality of coil windings 31, an inner ring member 32, and a plurality of stator teeth 33 arranged on the outer periphery of the inner ring member 32. The plurality of stator teeth 33 are evenly arranged on the outer peripheral surface of the inner ring member 32 at a predetermined interval, the stator teeth 33 are arranged radially along the inner ring member 32, and the coil windings 31 are respectively wound around the outer peripheries of the respective stator teeth 33.

[0031] A plurality of permanent magnets 7 are regularly installed at the inner wall surface of the rotor 4, and the number of the permanent magnets 7 corresponds to the number of the stator teeth 33.

[0032] The stator 3 is provided with a skeleton 8 on both end faces in its axial direction, and the coil winding 31 is wound outside the skeleton 8. In this application, by adding the skeleton 8, the enameled wire of the coil winding 31 is not easily worn, and the service life is extended. At the same time, the skeleton 8 also plays a role in regularizing the coil winding 31.

[0033] The skeleton 8 includes an embedding frame 81 embedded in the stator 3, and the embedding frame 81 is attached to the outer wall surface of the inner ring member 32 and the side wall surface of the stator tooth 33. In this application, the stable and reliable installation of the skeleton 8 is realized through the embedding frame 81.

[0034] The skeleton 8 includes a bottom plate 82, and the bottom plate 82 is connected to the embedding frame 81, and the bottom plate 82 is attached to the end face of the stator tooth 33. That is, it has a good protective effect on the corners of the coil winding 31.

[0035] The skeleton 8 includes an inner retaining ring 83 and an outer retaining piece 84. The inner retaining ring 83 is arranged on the inner ring member 32, the inner retaining ring 83 is arranged higher than the bottom plate 82, the outer retaining piece 84 is arranged on the circumference of the stator tooth 33, and both the inner retaining ring 83 and the outer retaining piece 84 are arranged higher than the bottom plate 82. In this application, through the structural arrangement of the inner retaining ring 83 and the outer retaining piece 84, the coil winding 31 is further blocked, so as to regularize the winding of the coil winding 31.

[0036] The other contents of Embodiment 3 are the same as those of Embodiment 1 or Embodiment 2. Outer retaining piece 84

[0037] The above has introduced this application in detail. In this article, specific examples are used to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand this application and its core idea. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An outer rotor motor, characterized in that: The invention comprises a transmission member (1), an outer sleeve (2), a stator (3) and a rotor (4); the rotor (4) is sleeved on the outer circumference of the stator (3); the outer sleeve (2) is sleeved on the circumferential surface of the rotor (4); a plurality of fan blades (5) are regularly arranged on the circumferential surface of the outer sleeve (2); the transmission member (1) comprises a shaft sleeve (11) and a disc member (12); the shaft sleeve (11) is located at the central axis of the stator (3); the disc member (12) is located at one end of the shaft sleeve (11) and the rotor (4); the disc member (12) and the shaft sleeve (11) are integrally formed; the disc member is fixedly connected to the rotor (4); the rotor (4) rotates, driving the transmission member (1) and the fan to rotate synchronously.

2. An outer rotor motor according to claim 1, characterized in that: Five fan blades (5) are regularly arranged on the outer peripheral surface of the outer jacket (2); the fan blades (5) are arc-shaped sheet structures; and the fan blades (5) penetrate the entire outer jacket (2) along the axial direction of the outer jacket (2).

3. An outer rotor motor according to claim 2, characterized in that: The fan blade (5) is an arc-shaped sheet structure that is bent toward one side of the disc member (12).

4. The outer rotor motor according to claim 1, characterized in that: The disc member (12) is provided with a plurality of air flow holes (6) in a regular arrangement, and the air flow holes (6) are arranged corresponding to the stator (3).

5. The outer rotor motor according to claim 1, characterized in that: The stator (3) comprises a plurality of coil windings (31), an inner ring member (32), and a plurality of stator teeth (33) arranged on the outer periphery of the inner ring member (32); the plurality of stator teeth (33) are evenly arranged on the outer periphery of the inner ring member at predetermined intervals; the stator teeth (33) are arranged along the radial direction of the inner ring member (32); and the coil windings (31) are respectively wound around the outer periphery of each stator tooth (33).

6. An outer rotor motor according to claim 1 or 5, characterized in that: A plurality of magnetic steels (7) are regularly installed on the inner wall surface of the rotor (4), and the number of the magnetic steels (7) corresponds to the number of the stator teeth (33).

7. The outer rotor motor according to claim 5, characterized in that: The stator (3) is provided with a frame (8) on both side end faces of the stator (3) in the axial direction, and the coil winding (31) is wound around the outside of the frame (8).

8. An outer rotor motor according to claim 7, characterized in that: The skeleton (8) comprises an embedding frame (81) embedded in the stator (3), and the embedding frame (81) is attached to the outer wall surface of the inner ring (32) and the side wall surface of the stator teeth (33).

9. The outer rotor motor according to claim 8, characterized in that: The frame (8) comprises a bottom plate (82), the bottom plate (82) being connected to the embedding frame (81), and the bottom plate (82) being attached to the end surface of the stator tooth (33).

10. An outer rotor motor according to claim 9, characterized in that: The skeleton (8) comprises an inner retaining ring (83) and an outer retaining plate (84); the inner retaining ring (83) is arranged on the inner ring member (32); the inner retaining ring (83) is arranged higher than the bottom plate (82); the outer retaining plate (84) is arranged on the circumference of the stator teeth (33); and both the inner retaining ring (83) and the outer retaining plate (84) are arranged higher than the bottom plate (82).

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