CN209748384U

CN209748384U - External rotor motor

Info

Publication number: CN209748384U
Application number: CN201920699146.8U
Authority: CN
Inventors: 方志财; 吕介龙
Original assignee: Heye Health Technology Co Ltd
Current assignee: Heye Health Technology Co Ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2019-12-06
Anticipated expiration: 2029-05-15

Abstract

The utility model provides an external rotor motor, which comprises a rotating shaft, a rotor structure and a stator structure, wherein the stator structure comprises a stator seat, a stator core arranged on the stator seat and a coil wound on the stator core; the rotor comprises a flywheel connected with the rotating shaft and a magnet arranged on the flywheel; the motor is characterized in that a first bearing is arranged between the flywheel and the rotating shaft, the flywheel is abutted to the outer ring of the first bearing, a second bearing is arranged between the stator seat and one end of the stator seat and the rotating shaft, and the other end of the stator seat supports the inner ring of the first bearing.

Description

External rotor motor

Technical Field

The utility model relates to the field of electric machines, especially, relate to an external rotor electric machine.

Background

Nowadays, the magnetic rotation technology is widely applied to the field of health care, a motor is generally adopted to drive a permanent magnet to rotate, blood microcirculation is promoted through a rotating magnetic field, blood flow is accelerated to achieve the effects of relaxing muscles and tendons, promoting blood circulation and removing blood stasis, and the effect which cannot be achieved by medicines is achieved. In the existing product, a plurality of gyromagnets are arranged on a motor rotating shaft according to requirements, and the motor drives the gyromagnets to rotate after being electrified. Because the motor structure is often installed on products such as massage chairs, magnetic therapy mattresses and the like, the volume of the motor structure is required to be as small as possible, and under the condition of a plurality of gyromagnets and magnetism isolating structures, the problems of poor structural stability and difficult installation exist. In addition, the inner rotor motor has the defects of less pole number, poor heat dissipation, difficult maintenance and the like compared with the outer rotor motor, and how to make the outer rotor motor as compact as possible under the condition of ensuring the stability is an important problem to meet the use requirements of different products.

SUMMERY OF THE UTILITY MODEL

The utility model provides an external rotor electric machine, this motor compact structure, with low costs.

In order to achieve the purpose, the utility model adopts the following technical scheme:

An external rotor motor comprises a rotating shaft, a rotor assembly and a stator assembly, wherein the stator assembly comprises a stator seat, a stator core arranged on the stator seat and a coil wound on the stator core; the rotor comprises a flywheel and a magnet arranged on the flywheel; and a first bearing is arranged between the flywheel and the rotating shaft, the flywheel is abutted against the outer ring of the first bearing, a second bearing is arranged between the stator seat and one end of the stator seat and the rotating shaft, and the other end of the stator seat supports the inner ring of the first bearing.

Preferably, the stator seat comprises an inner wall, an outer wall and a side wall connecting the inner wall and the outer wall, and the stator core is arranged on the inner wall.

Preferably, one end of the inner wall is provided with the second bearing, and the other end supports the first bearing.

Preferably, a shell is arranged on the outer side of the outer wall and comprises a limiting plate located on one side of the side wall, and the side wall is connected with the limiting plate.

Preferably, the flywheel includes a wheel disc, an annular protrusion is disposed on the wheel disc, and the first bearing is disposed between the annular protrusion and the stator seat.

preferably, the rotating shaft is provided with a magnetic rotator, and the magnetic rotator is arranged on one side or two sides of the rotor assembly.

Preferably, the magnetic rotator is of a cylindrical structure, and magnetic separation sheets are arranged at two ends of the magnetic rotator.

Preferably, a positioning pin is arranged between the magnetism isolating sheet close to one end of the stator assembly and the rotating shaft.

To sum up, compare with prior art, the utility model has the advantages of: the stator and the rotor form a nested structure, the stator component is arranged on the rotating shaft through the second bearing frame, and simultaneously supports the first bearing so as to install the rotor component, so that the motor has a compact structure, is convenient and fast to install and has low cost; the side wall of the stator assembly is fixed on the limiting plate, the stability of the stator in the working process is good, and the stability of the whole structure of the motor is guaranteed.

Drawings

FIG. 1 is a schematic view of a stator and rotor assembly construction;

FIG. 2 is a schematic structural diagram of a first embodiment of the motor;

Fig. 3 is a schematic structural diagram of a second embodiment of the motor.

the reference numbers in the figures are as follows:

1. The rotor assembly comprises a rotor assembly, 11, a flywheel, 111, a wheel disc, 112, an annular bulge, 12, a magnet, 2, a stator assembly, 21, a stator seat, 211, an inner wall, 212, an outer wall, 213, a side wall, 22, a stator core, 3, a rotating shaft, 31, a first bearing, 32, a second bearing, 4, a shell, 41, a limiting plate, 5, a magnetic rotator, 51, a magnetic separation sheet and 6 positioning pins.

Detailed Description

The invention will be further described with reference to the following examples in the drawings.

An external rotor motor as shown in fig. 1 to 3 includes a rotating shaft 3, a rotor assembly 1, and a stator assembly 2, wherein the stator assembly 2 includes a stator base 21, a stator core 22 disposed on the stator base 21, and a coil wound on the stator core 22. The rotor assembly 2 includes a flywheel 11 connected to the rotating shaft 3 and a magnet 12 provided on the flywheel 11, and the stator core 22 is disposed opposite to the magnet 12. A first bearing 31 is arranged between the flywheel 11 and the rotating shaft 3, the flywheel 11 is abutted against the outer ring of the first bearing 31, a second bearing 32 is arranged between one end of the stator seat 21 and the rotating shaft 3, and the other end of the stator seat is arranged between the first bearing 31 and the rotating shaft 3 so as to support the inner ring of the first bearing 31.

the stator holder 21 includes an inner wall 211 and an outer wall 212, and a side wall 213 connecting the inner wall 211 and the outer wall 212, and the inner wall 211 is provided with the stator core 22 on a side facing the magnet 12. The inner wall 211 has a second bearing 32 at one end and a first bearing 31 at the other end. Stator module 2 constitutes nested structure with rotor subassembly 1, and stator module 2 passes through second bearing 32 frame on pivot 3, and stator module 2 supports first bearing 31 simultaneously to installation rotor subassembly 1 makes motor compact structure, and it is convenient to install.

The outer side of the outer wall 212 is provided with a housing 4, the housing 4 includes a position-limiting plate 41 located on one side of the sidewall 213, and the sidewall 213 is connected to the position-limiting plate 41 through a screw. Stator module 2's lateral wall 213 is fixed on limiting plate 41, and the load of first bearing 31 inner circle effect on stator seat 21 is transmitted to limiting plate 41 on, and then transmits to the installation location structure of motor through casing 4 on, and stator module 2's in the course of the work stability is good, and then has guaranteed motor overall structure's stability. The flywheel 11 comprises a wheel disc 111, an annular bulge 112 is arranged on the wheel disc 111, the first bearing 31 is arranged between the annular bulge 112 and the stator seat 211, and the annular bulge 112 is sleeved on the outer ring of the first bearing 31 to support the flywheel 11, so that the flywheel 11 and the rotating shaft 3 can rotate relative to the stator. The wheel disc 111 and the rotating shaft 3 can be connected through a key.

The rotating shaft 3 is provided with one or two magnetic rotors 5, and the magnetic rotors 5 are arranged on one side or two sides of the rotor assembly 1. The gyromagnetic body 5 is of a cylindrical structure, and two ends of the gyromagnetic body 5 are provided with magnetic separation sheets 51. The magnetism isolating sheet 51 concentrates the magnetic induction line of the magnetic rotator 5 in the radial direction thereof to improve the utilization rate. A positioning pin 6 is arranged between the magnetism isolating sheet 51 close to one end of the stator assembly 2 and the rotating shaft 3. The magnetism isolating sheet 51 is magnetically adsorbed on the end face of the gyromagnetic body, the positioning pin 6 abuts against the end face of the gyromagnetic body 5 to limit the gyromagnetic body, the magnetism isolating sheet 51 on the inner side is fixed, and the magnetism isolating sheet 51 and the gyromagnetic body 5 are attracted through magnetic force and drive the gyromagnetic body 5 to rotate. One end of the magnetic rotator 5 is positioned by the positioning pin 6, the outer end of the magnetic isolation sheet 51 at the other end is abutted against the bush, and the bush is abutted against the inner ring of the bearing at the inner side of the motor end cover so as to position the magnetic rotator 5.

The above description is only for explaining the present invention, so that the person skilled in the art can completely implement the present invention, but not for limiting the present invention, and after reading the present specification, the person skilled in the art can make modifications to the present embodiment as required without inventive contribution, which are all modifications without inventive contribution, but are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides an external rotor electric machine, includes pivot (3) and rotor subassembly (1) and stator module (2), its characterized in that: the stator assembly (2) comprises a stator seat (21), a stator core (22) arranged on the stator seat (21) and a coil wound on the stator core (22); the rotor assembly (1) comprises a flywheel (11) and a magnet (12) arranged on the flywheel (11); a first bearing (31) is arranged between the flywheel (11) and the rotating shaft (3), the flywheel (11) is abutted to the outer ring of the first bearing (31), and a second bearing (32) and the other end of the stator seat (21) are arranged between one end of the stator seat (21) and the rotating shaft (3) to support the inner ring of the first bearing (31).

2. The external rotor electric machine according to claim 1, wherein: stator seat (21) include inner wall (211), outer wall (212) and connect inner wall (211) with lateral wall (213) of outer wall (212), be equipped with on inner wall (211) stator core (22).

3. The external rotor electric machine according to claim 2, wherein: one end of the inner wall (211) is provided with the second bearing (32), and the other end of the inner wall supports the first bearing (31).

4. The external rotor electric machine according to claim 2, wherein: the outer wall (212) outside is equipped with casing (4), casing (4) are including being located limiting plate (41) of lateral wall (213) one side, lateral wall (213) with limiting plate (41) are connected.

5. The external rotor electric machine according to claim 1, wherein: the flywheel (11) comprises a wheel disc (111), an annular bulge (112) is arranged on the wheel disc (111), and the first bearing (31) is arranged between the annular bulge (112) and the stator seat (21).

6. The external rotor electric machine according to claim 1, wherein: the rotor assembly is characterized in that a magnetic rotation body (5) is arranged on the rotating shaft (3), and the magnetic rotation body (5) is arranged on one side or two sides of the rotor assembly (1).

7. The external rotor electric machine according to claim 6, wherein: the magnetic rotation body (5) is of a cylindrical structure, and magnetic separation sheets (51) are arranged at two ends of the magnetic rotation body (5).

8. The external rotor electric machine according to claim 7, wherein: and a positioning pin (6) is arranged between the magnetism isolating sheet (51) close to one end of the stator assembly (2) and the rotating shaft (3).