CN220156327U

CN220156327U - Permanent magnet outer rotor motor

Info

Publication number: CN220156327U
Application number: CN202321336332.8U
Authority: CN
Inventors: 钟正平
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-12-08
Anticipated expiration: 2033-05-29

Abstract

The utility model provides a permanent magnet outer rotor motor, and belongs to the technical field of motors. The novel motor comprises a stator, an outer rotor, a shell and a rotating shaft, wherein the shell comprises a front shell with an opening formed in one side, a rear end cover with a sealing opening is arranged on one side cover of the front shell, a stator sleeve is arranged in the middle of the rear end cover in an inward extending mode, the stator is sleeved on the outer wall of the stator sleeve, the rotating shaft penetrates through the front shell and the middle of the stator sleeve, the outer rotor is fixed on the rotating shaft between the front shell and the stator sleeve, the inner side wall of the outer rotor wraps the stator, a cable extending out of the side wall of the front shell is fixed on one side of the stator, a plurality of cooling fins are formed in the circumferential direction of the inner wall of the stator sleeve, and the rotating shaft is located in the center of the cooling fins. The utility model has the advantages of simple and reasonable structural design, strong heat dissipation effect, long service life and the like.

Description

Permanent magnet outer rotor motor

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to a permanent magnet outer rotor motor.

Background

The permanent magnet motor is excited by the permanent magnet, so that the motor structure is simpler, the processing and assembly cost is reduced, a collector ring and an electric brush which are easy to cause problems are omitted, and the operation reliability of the motor is improved; and because exciting current is not needed, exciting loss is avoided, and the efficiency and the power density of the motor are improved.

The permanent magnet motor comprises an outer rotor type permanent magnet motor, heat is converted by loss generated in a stator of the outer rotor type permanent magnet motor, the transmission mode is single, and the heat can be transmitted to the machine shell only through heat conduction, so that the outer rotor motor is slow in heat dissipation, and the service life is greatly reduced.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a permanent magnet outer rotor which is reasonable in structural design and strong in heat dissipation effect.

The purpose of the utility model is realized in the following way:

the utility model provides a permanent magnet external rotor motor, includes stator, external rotor, casing and pivot, the casing includes that one side shaping has open-ended preceding casing, and one side lid of preceding casing is equipped with sealed opening rear end cover, and the middle part of rear end cover inwards extends has stator sleeve, stator sleeve locates stator sleeve's outer wall, the pivot runs through preceding casing and stator sleeve's middle part, is fixed with in the pivot between preceding casing and the stator sleeve the external rotor, the inside wall parcel of external rotor the stator, one side of stator is fixed with the cable conductor that stretches out preceding casing lateral wall, and stator sleeve's inner wall circumference shaping has a plurality of fin, the pivot is located the center of a plurality of fin.

The utility model is further arranged that ball bearings are arranged between the rotating shaft and the front casing and between the rotating shaft and the stator sleeve.

The utility model is further characterized in that an oil seal is arranged between the rotating shaft and the front casing, and a shaft bracket for placing the ball bearing is formed on the inner wall of the stator sleeve.

The utility model is further arranged that the outer rotor comprises an outer rotor bracket fixed on the rotating shaft, a rotor shell wrapping the outer wall of the stator is fixed on the outer rotor bracket, and a plurality of magnets are uniformly distributed on the circumference of the inner wall of the rotor shell.

The utility model further provides that the magnet is Ru-Fe-B.

The utility model further provides that a fixing pin is fixed between the rotating shaft and the outer rotor bracket.

The utility model is further arranged that the stator is formed by overlapping a plurality of silicon steel sheets, and the silicon steel sheets are provided with enamelled wires connected with the cable wires.

The utility model is further characterized in that the front shell and the rear end cover are made of aluminum, and the rear end cover and the radiating fin are integrally formed.

Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

1. according to the permanent magnet outer rotor motor provided by the utility model, the formed stator sleeve is in large-area contact with the stator, and the radiating effect is further improved through the radiating fins, so that the stator in a long-time working state can be used for a long time, and the long-time use of the outer rotor motor is ensured.

2. According to the utility model, the ball bearing is arranged between the rotating shaft and the shell, so that friction is reduced, and an oil seal is arranged on one side, so that the tightness in the motor is ensured.

3. The outer rotor provided by the utility model is provided with the outer rotor bracket and the rotor, and is convenient to install.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is an exploded view of the present utility model;

reference numerals:

1-a stator; 10-enamelled wire;

2-outer rotor; 20-an outer rotor bracket; 21-a rotor housing; 22-magnet;

3-a housing; 30-a front housing; 31-a rear end cap; 32-stator sleeve; 33-heat sink;

4-rotating shaft; 40-ball bearings; 41-oil seal; 42-shaft support; 43-fixing pins;

5-cable line.

Detailed Description

The utility model is further described in the following embodiments with reference to the drawings, see fig. 1 and 2:

the utility model provides a permanent magnet external rotor motor, includes stator 1, external rotor 2, casing 3 and pivot 4, casing 3 includes that one side shaping has open-ended preceding casing 30, and one side lid of preceding casing 30 is equipped with sealed open-ended rear end cover 31, and the middle part of rear end cover 31 inwards extends has stator sleeve 32, stator 1 cover is located stator sleeve 32's outer wall, pivot 4 runs through preceding casing 30 and stator sleeve 32's middle part, be located the pivot 4 between preceding casing 30 and the stator sleeve 32 and be fixed with external rotor 2, the inside wall parcel of external rotor 2 stator 1, one side of stator 1 is fixed with the cable wire 5 that stretches out preceding casing 30 lateral wall, and stator sleeve 32's inner wall circumference shaping has a plurality of fin 33, pivot 4 is located the center of a plurality of fin 33.

In the implementation process, the stator is firstly installed on the stator sleeve of the rear end cover 31, then the rotating shaft assembled with the outer rotor is installed, finally the front casing is sleeved, the cable connected to the stator stretches out of the front casing, the rear end cover is fastened and matched with the front casing through the bolts, the sealing ring is added between the rear end cover and the front casing, and the sealing performance is enhanced.

In the use, the stator generates heat under the operating condition, and the stator sleeve 32 that contacts with the stator realizes the heat dissipation function to add the fin, further promote the radiating effect, ensure the timely heat dissipation of the stator that generates heat, increase of service life.

Preferably, ball bearings 40 are disposed between the rotating shaft 4 and the front housing 30 and between the rotating shaft and the stator sleeve 32.

In the implementation process, the rotor drives the rotating shaft to rotate, and in order to reduce friction, a ball bearing is arranged at the contact part of the rotating shaft and the shell, so that the rotating is ensured to be smoother.

Preferably, an oil seal 41 is disposed between the rotating shaft 4 and the front casing 30, and a shaft bracket 42 for placing the ball bearing 40 is formed on the inner wall of the stator sleeve 32.

The sealing performance between the front shell and the rotating shaft is improved by the aid of the further oil seal, and the shaft support 42 prevents the ball bearing from being transversely offset in the rotating process of the rotating shaft.

Preferably, the outer rotor 2 includes an outer rotor bracket 20 fixed on the rotating shaft 4, a rotor shell 21 wrapping the outer wall of the stator is fixed on the outer rotor bracket 20, and a plurality of magnets 22 are uniformly distributed on the inner wall of the rotor shell 21 in the circumferential direction. Wherein the magnets are fixed to the inner wall of the rotor housing 21 by means of a special glue.

Preferably, the magnet 22 is Ru-Fe-B.

In the implementation process, the outer rotor is of a split structure, so that convenience is brought to installation, and meanwhile, the rotor shell can be adjusted, so that overhaul and adjustment are facilitated.

Preferably, a fixing pin 43 is fixed between the rotating shaft 4 and the outer rotor bracket 20. The fixing pin is convenient for fixing the rotor bracket.

Preferably, the stator 1 is formed by overlapping a plurality of silicon steel sheets, and the silicon steel sheets are provided with enamelled wires 10 connected with the cable wires.

Preferably, the front housing 30 and the rear cover 31 are made of aluminum, and the rear cover 31 and the heat sink 33 are integrally formed. The aluminum shell is light in weight and remarkable in heat dissipation effect.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. The utility model provides a permanent magnet external rotor motor, includes stator (1), external rotor (2), casing (3) and pivot (4), its characterized in that, casing (3) are including one side shaping has open-ended preceding casing (30), and one side lid of preceding casing (30) is equipped with sealed open-ended rear end cover (31), and the middle part of rear end cover (31) inwards extends has stator sleeve (32), the outer wall of stator sleeve (32) is located in stator (1) cover, pivot (4) run through preceding casing (30) and the middle part of stator sleeve (32), are located be fixed with on pivot (4) between preceding casing (30) and stator sleeve (32) external rotor (2), the inside wall parcel of external rotor (2) stator (1), one side of stator (1) is fixed with cable conductor (5) that stretches out preceding casing (30) lateral wall, and the inner wall circumference shaping of stator sleeve (32) has a plurality of fin (33), pivot (4) are located the center of a plurality of fin (33).

2. A permanent magnet external rotor motor according to claim 1, characterized in that ball bearings (40) are arranged between the rotating shaft (4) and the front housing (30) and between the rotating shaft and the stator sleeve (32).

3. A permanent magnet outer rotor motor according to claim 2, characterized in that an oil seal (41) is arranged between the rotating shaft (4) and the front casing (30), and a shaft bracket (42) for placing the ball bearing (40) is formed on the inner wall of the stator sleeve (32).

4. The permanent magnet outer rotor motor according to claim 1, wherein the outer rotor (2) comprises an outer rotor support (20) fixed on the rotating shaft (4), a rotor shell (21) wrapping the outer wall of the stator is fixed on the outer rotor support (20), and a plurality of magnets (22) are uniformly distributed on the circumference of the inner wall of the rotor shell (21).

5. The permanent magnet outer rotor motor according to claim 4, wherein the magnet (22) is a ru-iron-boron.

6. A permanent magnet outer rotor motor according to claim 4, characterized in that a fixing pin (43) is fixed between the rotating shaft (4) and the outer rotor bracket (20).

7. The permanent magnet outer rotor motor according to claim 1, wherein the stator (1) is formed by overlapping a plurality of silicon steel sheets, and enameled wires (10) connected with the cable wires are arranged on the silicon steel sheets.

8. The permanent magnet outer rotor motor according to claim 1, wherein the front casing (30) and the rear end cover (31) are made of aluminum, and the rear end cover (31) and the cooling fin (33) are integrally formed.