TWM484856U - External-rotor motor - Google Patents

Description

External motor

The present invention relates to an externally-rotating motor, and more particularly to an externally-rotating motor in which a stator is fixed to a front cover.

A motor is a device that converts electrical energy into mechanical energy. It is widely used in the mechanical structure of daily life. There are many types of DC motors, which are roughly classified into an internal rotation motor and an external rotation motor.

The externally-rotating motor comprises a rotor and a stator. The rotor mainly comprises an integral part of a shaft core and a magnet, and the stator mainly comprises a winding group, a circuit, an insulating frame and the like. The outer casing of the prior art external rotation motor is formed by fastening the front cover and the rear cover, and the winding of the stator is fixed in the inner cavity of the rear cover, and the product manufacturing process is complicated and is not easy to dissipate heat. However, the structure of the prior art motor occupies more positions in the overall volume, the structure is more complicated, and the manufacturing process is more complicated, resulting in an increase in cost.

In view of this, the purpose of the present invention is to provide an externally-rotating motor in which the winding of the stator is fixedly mounted on the front cover of the motor, which simplifies the structure, simplifies the manufacturing process, saves costs, and can also contribute to Cooling.

The main technical means for achieving the above purpose is that the external rotation motor comprises: a front cover having a first hollow column, the first hollow column protruding from the center of the front cover; a hollow column and fixed to the hollow column; a rotor comprising an iron shell and a rubber magnet, the rubber magnet being disposed in the iron shell, the iron shell being matchedly sleeved on the periphery of the stator, the rubber magnet being disposed around the stator; a back cover fixed a front cover; a first bearing coupled to the front cover; a second bearing forming a coaxial configuration with the first bearing; and a rotating shaft sequentially passing through the first bearing, the first hollow post, the The stator, the iron shell and the second bearing are fixed to the iron shell, and the rotor rotates when the rotor rotates.

The advantage of the present invention is that the stator is fixed to the front cover of the motor by punching, instead of the structure in which the stator of the conventional externally-rotating motor is fixed to the rear cover of the motor, so that the overall structure of the motor is simpler, and thus the motor can be eliminated. The process of assembling the stator on the back cover simplifies the process of product production, reduces the production cost, and is provided in the front cover system to help dissipate heat. At the same time, according to the cost of the product, different bearings can be selected locally, and the ball bearing or the copper bearing can be replaced at any time to make the product more flexible. The motor of this creation is suitable for household electric fans, household exhaust fans, industrial exhaust fans, ceiling fans, air purifiers, air conditioners, and the like.

3‧‧‧Fixed buckle

9‧‧‧ bolt

10‧‧‧ front cover

11‧‧‧ bottom

12‧‧‧ first through hole

13‧‧‧ week side wall

14‧‧‧The first hollow column

15‧‧‧Front

16‧‧‧Installation holes

17‧‧‧Bottom flange

18‧‧‧Inner hole

20, 20A, 20B‧‧‧ back cover

22, 22A, 22B‧‧‧ fourth through hole

23‧‧‧Bulge

24, 24A, 24B‧‧‧ screw holes

27‧‧‧ Protrusion

30‧‧‧ Stator

31‧‧‧Insulation frame

32‧‧‧Second through hole

33‧‧‧Winding

35‧‧‧ boards

40‧‧‧Rotor

42‧‧‧ iron shell

44‧‧‧Rubber magnet

50‧‧‧First bearing

60, 60A‧‧‧second bearing

70‧‧‧ shaft

80‧‧‧Deceleration Module

90‧‧‧Positioning column

100‧‧‧External motor

421‧‧‧ bottom

422‧‧‧ center hole

423‧‧‧ week side wall

424‧‧‧Second hollow column

425‧‧‧ Positioning Department

426‧‧‧ third through hole

1 is a perspective view of an embodiment of an externally-rotating motor of the present invention.

Fig. 2 is an exploded perspective view of Fig. 1;

Fig. 3 is an exploded perspective view showing an embodiment of a rotor of an externally-rotating motor.

Figure 4 is a cross-sectional view of Figure 1.

Fig. 5 is a perspective view showing another embodiment of the rear cover of the externally-rotating motor.

Fig. 6 is a perspective view showing another embodiment of the rear cover of the externally-rotating motor.

Fig. 7 is an exploded perspective view showing another embodiment of the externally-rotating motor of the present invention.

Figure 8 is a cross-sectional view showing another embodiment of the externally-rotating motor of the present invention.

Referring to FIG. 1 and FIG. 2 , the external rotary motor 100 mainly includes a front cover 10 , a rear cover 20 , a stator 30 , a rotor 40 , a first bearing 50 , a second bearing 60 , and a first bearing 50 . Rotary shaft 70.

The front cover 10 has a cylindrical shape and has a bottom portion 11 and a side wall 13 . The bottom portion 11 has a disk shape. The peripheral side wall 13 is disposed around the bottom portion 11. A first through hole 12 is formed at the center of the bottom portion 11 , and a first hollow portion is formed. The column 14 extends outward from the bottom 11 parallel to the peripheral side wall 13, and the inner peripheral wall of the first hollow column 14 is disposed around the first through hole 12, and the first hollow column 14 may be integrally formed with the bottom portion 11. Further, a flange 15 is formed at the edge of the peripheral side wall 13, and four mounting holes 16 are formed in the flange 15.

The rear cover 20 includes a circular frame. The two U-shaped projection frames 23 are disposed to be intersected and connected to the frame, and a vent hole is formed between the two U-shaped protrusion frames 23. A fourth through hole 22 is formed in two U-shapes. The protruding frame 23 has four protrusions 27 at the periphery of the frame, and a screw hole 24 is formed in each of the protrusions 27, and the screw hole 24 corresponds to the mounting hole 16 of the front cover 10. In the present embodiment, the back cover 20 may be made of a plastic material.

The stator 30 includes an insulating frame 31, a plurality of windings 33, and a circuit board 35. The windings 33 are disposed on the insulating frame 31. The circuit board 35 is connected to the insulating frame 31, and a second through hole 32 is formed in the center of the insulating frame 31.

Referring to FIGS. 2 and 3, the rotor 40 includes a cylindrical iron shell 42 and a rubber magnet 44. The iron shell 42 has a cylindrical shape with a bottom portion 421 and a peripheral side wall 423. The bottom portion 421 has a disk shape, and the peripheral side wall 423 is disposed around the bottom portion 421. A center hole 422 is formed at the center of the bottom portion 421 and is adjacent to the peripheral side wall 423. An annular positioning portion 425 is formed. A second hollow column 424 is disposed on the bottom portion 421 and extends perpendicular to the bottom portion 421 and parallel to the circumferential side wall 423. A third through hole 426 is formed in the second hollow column 424. The post 424 may be integrally formed with the iron shell 42 or may be riveted or die cast. The rubber magnet 44 is wound into a cylindrical shape and placed in the iron case 42, and the outer peripheral wall of the rubber magnet 44 abuts against the inner side of the peripheral side wall 423 and is in close contact with the peripheral side wall 423 by the restoring tension of the material itself, and the rubber magnet 44 The edge bears against the positioning portion 425.

Referring to FIG. 4 , the first bearing 50 is disposed in the first through hole 12 , and one side of the first through hole 12 bears against the bottom flange 17 of the first through hole 12 , and the other side is fixed by the fixed buckle 3 . The formation is coaxial with the first through hole 12. The second bearing 60 is disposed coaxially with the first bearing 50 and fixed by riveting.

The second through hole 32 of the stator 30 is sleeved on the first hollow column 14 and the first hollow column 14 is fixed to the inner peripheral wall of the second through hole 32 by punching. The iron shell 42 of the rotor 40 is coupled to the rotating shaft 70 by the second hollow column 424 and the iron shell 42 is fixedly coupled with the rotating shaft 70 by riveting, and the second hollow column 424 is in contact with the rotating shaft 70, and is combined with the conventional stamping. Aluminum blocks and iron blocks are more material-saving and simplify the process than copper blocks. The iron shell 42 is sleeved around the stator 30 and the rubber magnet 44 is disposed around the winding 33 of the stator. The rotating shaft 70 passes through the first bearing 50, the first positioning post 14, the third through hole 426, and the second bearing 60, respectively. The screw hole 9 is threaded through the mounting hole 16 and screwed into the screw hole 24 of the rear cover 20, so that the rear cover 20 is coupled to the front cover 10 to form an accommodation space for accommodating the stator 30 and the rotor 40, and the rotating shaft 70 passes through the rear cover 20 at the same time. The fourth through hole 22. When current passes through the windings 33 of the stator 30, the exciting action causes the rotor 40 to rotate while causing the rotating shaft 70 to rotate.

The rotating shaft 70 can also be connected to a speed reducing module 80, and the rotational speed outputted by the rotating shaft 70 can be changed. In addition, an inner screw hole 18 is formed in the peripheral side wall 13 of the front cover 10, and a positioning post 90 can be screwed to the inner screw hole 18 to achieve the effect of positioning and mounting.

Referring to FIG. 5, FIG. 5 shows another embodiment of the rear cover of the externally-rotating motor of the present invention. Similar to the embodiment of FIGS. 1 to 4, the rear cover 20A also forms ventilation between the two U-shaped projections. The hole is formed with a fourth through hole 22A at the center, four screw holes 24A are formed at the edge, and four studs are formed on the frame. Corresponding to the two U-shaped protrusion frames, the back cover 20A of the present embodiment is made of an aluminum alloy. In the present embodiment, the second bearing 60 may be mounted in the fourth through hole 22A.

Please refer to FIG. 6. FIG. 6 shows another embodiment of the rear cover of the externally-rotating motor of the present invention. The rear cover 20B is integrally covered without a venting hole, and the center forms a fourth through hole 22B. Hole 24B. The back cover 20B of this embodiment is made of a ferrous material. As in the embodiment of Fig. 5, in the present embodiment, the second bearing 60 can be mounted in the fourth through hole 22B.

In another embodiment, referring to FIG. 7 and FIG. 8 , the second bearing 60A can also be mounted in the first hollow column 14 and formed coaxially with the first bearing 50 .

The advantage of the present invention is that the stator is fixed to the front cover of the motor by punching, instead of the structure in which the stator of the conventional externally-rotating motor is fixed to the rear cover of the motor, so that the overall structure of the motor is simpler, and thus the motor can be eliminated. The process of assembling the stator on the back cover simplifies the process of product production and reduces production costs. At the same time, according to the cost of the product, different bearings can be selected locally, and the ball bearing or the copper bearing can be replaced at any time to make the product more flexible. This motor is suitable for household electric fans, household exhaust fans, industrial exhaust fans, ceiling fans, air purifiers, air conditioners, etc.

The present invention is disclosed in the above embodiments, but it is not intended to limit the scope of the present invention. Anyone skilled in the art can make some changes and refinements without departing from the spirit of the present invention. The scope of protection is subject to the definition of the scope of the patent application attached.

3‧‧‧Fixed buckle

10‧‧‧ front cover

11‧‧‧ bottom

12‧‧‧ first through hole

13‧‧‧ week side wall

14‧‧‧The first hollow column

17‧‧‧Bottom flange

18‧‧‧Inner hole

20‧‧‧ Back cover

22‧‧‧4th through hole

30‧‧‧ Stator

33‧‧‧Winding

40‧‧‧Rotor

42‧‧‧ iron shell

44‧‧‧Rubber magnet

50‧‧‧First bearing

60‧‧‧second bearing

70‧‧‧ shaft

80‧‧‧Deceleration Module

90‧‧‧Positioning column

422‧‧‧ center hole

424‧‧‧Second hollow column

426‧‧‧ third through hole

Claims (15)

An externally-rotating motor includes: a front cover having a first hollow column protruding from a center of the front cover; a stator disposed on the first hollow column and fixed to the first hollow a rotor, comprising an iron shell and a rubber magnet, the rubber magnet being disposed in the iron shell, the iron shell being matchedly sleeved on the periphery of the stator, so that the rubber magnet is disposed around the stator; a cover fixed to the front cover; a first bearing coupled to the front cover; a second bearing forming a coaxial configuration with the first bearing; and a rotating shaft passing through the first bearing, the first hollow column, The stator, the iron shell and the second bearing are fixed to the iron shell, and the rotor rotates when the rotor rotates. An external rotary motor according to claim 1, wherein a center of a bottom surface of the iron shell has a center hole, and an inner peripheral wall of a second hollow column surrounds the center hole and protrudes from an edge of the center hole and is perpendicular to the iron shell A bottom surface is formed on the second hollow column, and the center hole extends toward the inner diameter of the second hollow column. The external rotary motor according to claim 2, wherein the second hollow column is integrally formed with the iron casing. The outer-rotating motor according to any one of claims 1 to 3, wherein the edge of the rear cover has a plurality of protruding screw holes, and the front cover has a plurality of protruding mounting holes, and the mounting holes correspond to In the screw holes, a plurality of bolts are threaded through the mounting holes to be screwed to the screw holes. A rotary motor as claimed in claim 4, wherein the first bearing is a ball bearing or a copper bearing. A rotary motor as claimed in claim 4, wherein the second bearing is a ball bearing or a copper bearing. The rotary motor of claim 1, wherein the front cover has a first through hole formed in a center of the front cover, and an inner peripheral wall of the first hollow column surrounds the first through hole And protruding from an edge of the first through hole, the first bearing system is mounted on the first through hole. The external rotary motor according to claim 7, wherein the stator has a second through hole, and the inner peripheral wall of the second through hole is sleeved on the hollow column and fixed on the first hollow column. . The external rotary motor according to claim 8, wherein the iron casing has a third through hole formed in a center of the iron casing, and the rotating shaft passes through the third through hole. The external rotary motor according to claim 9, wherein the rear cover has a fourth through hole formed at a center of the rear cover, and the rotating shaft passes through the fourth through hole. The externally-rotated motor of claim 10, wherein the second bearing is mounted to the fourth through hole. The externally-rotated motor of any one of claims 7 to 10, wherein the second bearing is disposed in the first hollow column. The externally-rotated motor according to any one of claims 1 to 3, wherein the rear cover is made of a plastic material or an aluminum alloy material or a ferrous material. The external rotary motor according to claim 1, further comprising a shifting module, wherein the shifting module is fixed to the rear cover. The rotary motor according to claim 1, further comprising a positioning post, wherein the outer peripheral wall of the front cover is provided with an inner screw hole, and the positioning post is screwed to the inner screw hole.