CN216625438U

CN216625438U - External rotor motor

Info

Publication number: CN216625438U
Application number: CN202122423111.1U
Authority: CN
Inventors: 龙兴佐; 马云
Original assignee: Zhongshan Puyang Electronic And Technology Co ltd
Current assignee: Zhongshan Puyang Electronic And Technology Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-05-27
Anticipated expiration: 2031-10-08

Abstract

The utility model discloses an external rotor motor, which comprises an upper end cover and a lower end cover which are arranged at an interval from top to bottom, wherein a stator assembly is arranged in the upper end cover, a rotor assembly is arranged in the lower end cover, the rotor assembly is sleeved outside the stator assembly, a rotating shaft is arranged at the axis of the lower end cover, the rotating shaft upwards penetrates through the upper end cover and extends upwards, a circuit board is also arranged in the upper end cover above the stator assembly, the circuit board is electrically connected with the stator assembly, a first extending part which protrudes upwards is arranged on the upper end surface of the upper end cover, a second extending part which extends downwards is arranged on the lower end surface of the upper end cover, the second extending part and the first extending part are respectively arranged coaxially with the rotating shaft, a shaft hole which penetrates through the second extending part and the first extending part from top to bottom is arranged in each other, and a bearing is arranged in the shaft hole, the rotating shaft is inserted into the inner ring of the bearing, and the stator assembly is fixedly sleeved on the outer wall of the second extending part.

Description

External rotor motor

Technical Field

The utility model relates to an outer rotor motor.

Background

The existing external rotor motor is internally installed through a stator, and a rotor is externally installed through a shell and a rotating shaft to realize the rotor, but the existing external rotor motor has poor stability of the whole structure, so that the installation stability of the rotating shaft of the motor cannot be guaranteed, and the situations of eccentricity and the like are easy to occur in the long-term use process;

therefore, an outer rotor motor with good stability is urgently needed to solve the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an outer rotor motor with good stability;

the outer rotor motor comprises an upper end cover and a lower end cover which are arranged at an interval from top to bottom, wherein a stator assembly is arranged in the upper end cover, a rotor assembly is arranged in the lower end cover, the rotor assembly is sleeved outside the stator assembly, a rotating shaft is arranged at the axis of the lower end cover, the rotating shaft penetrates through the upper end cover upwards and extends upwards, a circuit board is further arranged in the upper end cover above the stator assembly, and the circuit board is electrically connected with the stator assembly;

the upper end face of the upper end cover is provided with a first extending part protruding upwards, the lower end face of the upper end cover is provided with a second extending part extending downwards, the second extending part and the first extending part are coaxially arranged with the rotating shaft respectively, shaft holes penetrating up and down are formed in the second extending part and the first extending part, a bearing is arranged in each shaft hole, the rotating shaft is inserted into an inner ring of the bearing, and the stator assembly is fixedly sleeved on the outer wall of the second extending part;

preferably, the rotating shaft and the lower end cover are of an integral injection molding structure;

preferably, the rotor assembly comprises a magnetic ring, a shielding cover is fixedly sleeved on the outer wall of the magnetic ring, the upper opening and the lower opening of the shielding cover are arranged, and the shielding cover is fixed on the inner wall of the lower end cover;

preferably, convex ribs are uniformly distributed on the inner wall of the lower end cover along the circumference;

preferably, two mounting lug seats are respectively arranged on the left side and the right side of the outer wall of the upper end cover, and the mounting lug seats are longitudinally arranged;

preferably, the outer wall of the upper end cover is also provided with a threading groove;

the utility model has the advantages of simple and reasonable structure and good stability, compared with the prior art, the upper end surface of the upper end cover is provided with the first extending part which protrudes upwards, the lower end surface of the upper end cover is provided with the second extending part which extends downwards, and the mounting distance of the two bearings can be lengthened through the upper extending part and the lower extending part, so that the stability of the rotating shaft is improved, and the use requirement is met.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a second exploded view of the present invention;

fig. 4 is a schematic perspective view of the second embodiment of the present invention.

Detailed Description

The utility model is further described with reference to the drawings and the embodiments;

referring to fig. 1 to 4, an outer rotor motor includes an upper end cover 10 and a lower end cover 20 which are arranged at an upper and lower interval, a stator assembly 40 is arranged in the upper end cover 10, a rotor assembly 30 is arranged in the lower end cover 20, the rotor assembly 30 is sleeved outside the stator assembly 40, a rotating shaft 210 is arranged at an axis of the lower end cover 20, the rotating shaft 210 upwardly penetrates through the upper end cover 10 and upwardly extends, a circuit board 50 is further arranged in the upper end cover 10 above the stator assembly 40, and the circuit board 50 is electrically connected with the stator assembly 40;

a first extending part 120 protruding upwards is arranged on the upper end face of the upper end cover 10, a second extending part 140 extending downwards is arranged on the lower end face of the upper end cover 10, the second extending part 140 and the first extending part 120 are coaxially arranged with the rotating shaft 210 respectively, shaft holes penetrating up and down are arranged in the second extending part 140 and the first extending part 120, bearings 130 are arranged in the shaft holes, the rotating shaft 210 is inserted into inner rings of the bearings 130, the stator assembly 40 is fixedly sleeved on the outer walls of the second extending part 140, that is, the mounting distances of the two bearings can be increased through the upper and lower extending parts, so that the stability of the rotating shaft is improved, and the use requirements are met;

the first extension part 120 is a conical column with a small upper part and a large lower part, so that better stress can be exerted, the overall strength can be ensured, and the overall stability can be enhanced;

specifically, the rotating shaft 210 and the lower end cover 20 are of an integrated injection molding structure, and the injection molding integrated structure can not only improve the production efficiency, but also enhance the overall strength and prolong the service life of the product;

further, the rotor assembly 30 includes a magnetic ring 310, a shielding cover 320 is fixedly sleeved on the outer wall of the magnetic ring 310, the shielding cover 320 is provided with an upper opening and a lower opening, the shielding cover 320 is fixed on the inner wall of the lower end cover 20, when assembling, the magnetic ring 310 is pressed into the shielding cover 320, and then the shielding cover 320 and the magnetic ring 310 are pressed into the lower end cover 20, so that the structure is simple, the assembling is convenient, and the use requirements are met;

furthermore, the inner wall of the lower end cover 20 is uniformly provided with the ribs 220 along the circumference, and the ribs 220 can enhance the overall strength of the lower end cover 20 and enhance the stability of the connection between the lower end cover 20 and the rotor assembly 30;

furthermore, two mounting ear seats 110 are respectively arranged on the left and right sides of the outer wall of the upper end cover 10, the mounting ear seats 110 are longitudinally arranged, and the longitudinally arranged mounting ear seats 110 can facilitate assembly, so that the convenience of assembly is improved;

further, a threading groove is also formed in the outer wall of the upper end cover 10;

in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for the convenience of description and simplicity of description, rather than to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model, the terms "first" and "second" are used for descriptive purposes only, but not as indicating or implying relative importance or implicitly indicating the number of technical features indicated;

the foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. An external rotor electric machine characterized in that: the motor comprises an upper end cover (10) and a lower end cover (20) which are arranged at an upper interval and a lower interval, wherein a stator assembly (40) is arranged in the upper end cover (10), a rotor assembly (30) is arranged in the lower end cover (20), the rotor assembly (30) is sleeved on the outer side of the stator assembly (40), a rotating shaft (210) is arranged at the axis of the lower end cover (20), the rotating shaft (210) upwards penetrates through the upper end cover (10) to extend upwards, a circuit board (50) is further arranged in the upper end cover (10) above the stator assembly (40), and the circuit board (50) is electrically connected with the stator assembly (40);

a first extending part (120) protruding upwards is arranged on the upper end face of the upper end cover (10), a second extending part (140) extending downwards is arranged on the lower end face of the upper end cover (10), the second extending part (140) and the first extending part (120) are respectively arranged coaxially with the rotating shaft (210), shaft holes penetrating up and down are formed in the second extending part (140) and the first extending part (120), a bearing (130) is arranged in the shaft holes, the rotating shaft (210) penetrates through an inner ring of the bearing (130), and the stator assembly (40) is fixedly sleeved on the outer wall of the second extending part (140);

the outer wall of the upper end cover (10) is also provided with a threading groove.

2. The external rotor electric machine according to claim 1, wherein: the rotating shaft (210) and the lower end cover (20) are of an integrated injection molding structure.

3. The external rotor electric machine according to claim 1, wherein: the rotor assembly (30) comprises a magnetic ring (310), a shielding cover (320) is fixedly sleeved on the outer wall of the magnetic ring (310), the upper opening and the lower opening of the shielding cover (320) are arranged, and the shielding cover (320) is fixed on the inner wall of the lower end cover (20).

4. The external rotor electric machine according to claim 1, wherein: and convex ribs (220) are uniformly distributed on the inner wall of the lower end cover (20) along the circumference.

5. The external rotor electric machine according to claim 1, wherein: two mounting lug seats (110) are arranged on the left side and the right side of the outer wall of the upper end cover (10) respectively, and the mounting lug seats (110) are arranged longitudinally.

6. The external rotor electric machine according to claim 1, wherein: the first extension part (120) is a conical column with a small upper part and a big lower part.