CN111865002A

CN111865002A - Injection molding stator and outer rotor motor

Info

Publication number: CN111865002A
Application number: CN202010621066.8A
Authority: CN
Inventors: 漆凌君; 杨赛; 陈东锁
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2020-10-30

Abstract

The invention discloses an injection molding stator and an outer rotor motor, wherein the injection molding stator comprises a winding, an iron core, a control panel, a mounting bracket and a plastic package shell, the winding is wound on the iron core, one end of the mounting bracket is inserted into an inner hole of the iron core, the other end of the mounting bracket is matched with the control panel, the plastic package shell comprises a flange cover, an upper fixing cylinder and a lower fixing cylinder, the flange cover is sleeved outside the mounting bracket, the control panel is arranged inside the flange cover, the upper end of the upper fixing cylinder is connected with the flange cover into a whole, the lower end of the upper fixing cylinder is sleeved outside the upper end of the winding, and the upper end of the lower fixing cylinder is sleeved outside the lower end of the winding. An external rotor motor comprises the injection molding stator. The control panel is arranged inside the plastic package shell, so that the control panel is protected, and the service life is prolonged; the structure of the mounting bracket is simplified, the functions of the mounting bracket are reduced, and the manufacturing cost and the precision requirement are reduced; thereby improving the overall quality and prolonging the service life.

Description

Injection molding stator and outer rotor motor

Technical Field

The invention relates to the technical field of external rotor motors, in particular to an injection molding stator and an external rotor motor.

Background

The direct current brushless motor in the industry of household appliance fans and warm air blowers generally adopts an outer rotor motor (as shown in the figure I), and the outer rotor motor comprises an inner stator part, a rotor part and a control panel part. The winding of the inner stator of the motor is wound on the iron core, and the bearing support and the control plate are pressed into the inner hole of the iron core after being pressed together, so that the inner stator part is completed. The rotor part of the motor is processed as follows: the magnetic material is pressed into the inner wall of the metal end cover in a ring shape, the small bearing is sleeved into one end of the rotating shaft, the large bearing is sleeved into the other end of the rotating shaft, the rotating shaft with the bearing is inserted into the middle hole of the bearing support, and finally the inner hole of the metal end cover and the rotating shaft are pressed into a whole. Although the structure is simple, the control panel is easy to be damaged after being exposed for a long time, and the damage is serious especially in the wet electric appliances in the use environment such as a bathroom warm air blower.

The bearing support is shown as a second drawing, the bearing support is a supporting part of the whole motor, the two ends of the bearing support are bearing chambers, the precision requirement of the inner diameter of the two bearing chambers of the bearing support is high, general metal materials cannot meet the precision requirement through pouring, special materials need to be selected or a lathe is added for finish machining, the precision requirement can be met, otherwise, the bearing noise is high, and the precision requirement is high, so that the cost of the whole bearing support is too high.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the injection molding stator and the outer rotor motor, the control board is arranged inside the plastic package shell, the protection of the control board is realized, and the service life is prolonged; the structure of the mounting bracket is simplified, the functions of the mounting bracket are reduced, and the functions are replaced by other structures, so that the processing convenience of the mounting bracket is improved, and the manufacturing cost and the precision requirement are reduced; thereby improving the overall quality and prolonging the service life.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a stator of moulding plastics, includes winding, iron core, control panel, installing support and plastic envelope casing, the winding twines in the iron core, during the one end of installing support inserted the iron core hole, the other end and the control panel cooperation of installing support, the plastic envelope casing includes the blind flange, goes up solid fixed cylinder and solid fixed cylinder down, the blind flange overlaps the outside at the installing support, the inside of blind flange is located to the control panel, the upper end of going up solid fixed cylinder is even as an organic whole with the blind flange, goes up the lower extreme overcoat of solid fixed cylinder in the upper end of winding, the upper end cover of solid fixed cylinder is in the lower extreme of winding down.

Preferably, the installing support is of a cylindrical structure, a fixing column is arranged on one side of the installing support, a shaft hole is formed in the middle of the control panel, a fixing groove is formed in the inner wall of the shaft hole, and the fixing groove is matched with the fixing column.

Preferably, the lateral wall of installing support is equipped with outer boss, one side that outer boss orientation control panel is equipped with the locking post, be equipped with on the control panel with locking post complex connecting hole.

An external rotor motor comprises the injection molding stator.

Preferably, the middle part of the injection molding stator is provided with a rotating shaft, the outer part of the injection molding stator is sleeved with a shell, the inner wall of the shell is provided with a permanent magnet, and the permanent magnet is sleeved outside the iron core.

Preferably, large bearings are arranged between the rotating shaft and the flange cover and between the lower fixed cylinder and the bearing.

Preferably, the shell and the rotating shaft are connected into a whole through an injection molding disc.

Preferably, a large bearing is arranged between the rotating shaft and the flange cover, small bearings are arranged between the lower fixing barrel and the bearings, and the shell and the rotating shaft are fixed through compression joint.

Preferably, be equipped with big bearing between blind flange and the pivot, link as an organic wholely through moulding plastics dish between shell and the pivot, the inboard of plastic dish is equipped with the plastic cover of cover outside the pivot, plastic cover and plastic dish position an organic whole structure.

Preferably, a small bearing is arranged between the rotating shaft and the mounting bracket.

Compared with the prior art, the invention has the beneficial effects that:

the control panel is arranged inside the plastic package shell, so that the control panel is protected, and the service life is prolonged; the mounting bracket replaces the existing bearing bracket, the structure of the mounting bracket is simplified, the functions of the mounting bracket are reduced, and the functions are replaced by other structures, so that the processing convenience of the mounting bracket is improved, and the manufacturing cost and the precision requirement are reduced; thereby improving the overall quality and prolonging the service life.

Drawings

Fig. 1 is a schematic structural diagram of a dc brushless external rotor motor in the prior art;

FIG. 2 is a schematic structural diagram of a conventional bearing support;

FIG. 3 is a schematic structural view of an injection molded stator;

fig. 4 is a schematic structural view of an outer rotor motor according to a first embodiment;

fig. 5 is a schematic structural view of an outer rotor motor according to a second embodiment;

fig. 6 is a schematic structural view of an outer rotor motor according to a third embodiment;

fig. 7 is a schematic structural view of an outer rotor motor according to a fourth embodiment;

fig. 8 is a schematic structural view of an outer rotor motor according to a fifth embodiment;

fig. 9 is a schematic structural view of an outer rotor motor according to a sixth embodiment;

FIG. 10 is a schematic view of the mounting bracket;

fig. 11 is a schematic structural diagram of the control board.

In the figure: 1-winding; 2-iron core; 3-an inner hole of the iron core; 4-a bearing support; 5-a small bearing; 6-a housing; 7-a rotating shaft; 8-big bearing; 9-a control panel; 901-fixed slots; 902-shaft hole; 903-connecting hole; 10-a bearing chamber; 11-mounting a bracket; 1101-fixed columns; 1102-outer boss; 1103 — locking post; 12-plastic packaging a shell; 1201-flange cover; 1202-upper fixed cylinder; 1203-lower fixed cylinder; 13-with a magnet; 14-plastic disc; 1401-plastic sheath.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 3-4, an injection molding stator includes a winding 1, an iron core 2, a control plate 9, a mounting bracket 11, and a plastic package casing 12, where the iron core 2 is formed by laminating steel sheets, the winding 1 is wound around the iron core 2, one end of the mounting bracket 11 is inserted into an inner hole 3 of the iron core, the other end of the mounting bracket 11 is matched with the control plate 9, the plastic package casing 12 includes a flange cap 1201, an upper fixing cylinder 1202, and a lower fixing cylinder 1203, the flange cap 1201 is sleeved outside the mounting bracket 11, the control plate 9 is disposed inside the flange cap 1201, the upper end of the upper fixing cylinder 1202 is connected with the flange cap 1201 into a whole, the lower end of the upper fixing cylinder 1202 is sleeved outside the winding 1, and the upper end of the lower fixing cylinder 1203 is sleeved outside the lower end of the winding 1.

As shown in fig. 10 to 11, the mounting bracket 11 is a cylindrical structure, one side of the mounting bracket 11 is provided with 1 to 4 fixing columns 1101, the middle part of the control board 9 is provided with a shaft hole 902, the inner wall of the shaft hole 902 is provided with fixing grooves 901, the number of the fixing grooves 901 is 3, and the fixing grooves 901 are matched with the fixing columns 1101. The size of the inner hole of the control panel 9 is smaller than the outer diameter of the mounting bracket 11, one end of the mounting bracket is pressed into the inner hole 3 of the iron core, the control panel 9 is sleeved from the other end of the mounting bracket 11 and is placed on one side of the mounting bracket 3, and the fixing grooves 901 of the control panel 9 and the three fixing columns 1101 of the mounting bracket are just clamped and positioned to prevent the control panel from moving radially relative to the mounting bracket.

Further, an outer boss 1102 is arranged on the side wall of the mounting bracket 11, a locking column 1103 is arranged on one side, facing the control plate 9, of the outer boss 1102, and a connecting hole 903 matched with the locking column 1103 is arranged on the control plate 9. The control plate 9 is fixed to the mounting bracket 11 by staking the outer boss 1102 to prevent axial movement of the control plate 9 relative to the mounting bracket 11. Or the connecting hole 903 on the control plate 9 is eliminated, and the locking column 1103 is directly propped by the thimble arranged on the shell of the die, so that the mounting bracket 11 can be axially fixed.

Wherein, the material of installation directness can be metal material or hard plastic material.

And after finishing the winding 1, the iron core 2, the control panel 9 and the mounting bracket 11, putting the windings 1, the iron core 2, the control panel 9 and the mounting bracket 11 into an injection mold, injecting the windings 1, the iron core 2, the control panel 9 and the mounting bracket 11 into a whole by using high-molecular plastic packaging materials, and forming two bearing chambers at two ends of the plastic package stator by using the plastic packaging materials to form the plastic package stator.

In the first embodiment, the first step is,

as shown in fig. 5, the external rotor motor comprises the injection-molded stator.

The middle part of the injection molding stator is provided with a rotating shaft 7, the outer part of the injection molding stator is sleeved with a shell 6, the inner wall of the shell 6 is provided with a permanent magnet 13, and the permanent magnet 13 is sleeved outside the iron core 2.

The processing process of the rotor part comprises the following steps: the permanent magnet 13 is pressed into the metal shell 6, the rotating shaft 7 and the shell 6 are connected and injected into a whole by plastic (plastic disc 14), and the rotor is magnetized.

The motor final assembly process: the rotor is sleeved in the stator, the rotating shaft 7 is out of the end face of the stator, and bearings are assembled at the two ends of the stator.

In the second embodiment, the first embodiment of the method,

as shown in fig. 6, the output shaft direction of this embodiment is opposite to that of the second embodiment, and the rest of the structure is the same.

In the third embodiment, the first step is that,

an external rotor motor comprises the injection molding stator.

As shown in fig. 6, the middle of the injection molding stator is provided with a rotating shaft 7, the outer part of the injection molding stator is sleeved with a shell 6, the inner wall of the shell 6 is provided with a permanent magnet 13, and the permanent magnet 13 is sleeved outside the iron core 2.

And large bearings 8 are arranged between the rotating shaft 7 and the flange cover 1201 and between the lower fixing cylinder 1203 and the bearings.

The shell 6 and the rotating shaft 7 are connected into a whole through an injection molding disc.

In the fourth embodiment, the first step is that,

an external rotor motor comprises the injection molding stator.

As shown in fig. 7, a large bearing 8 is disposed between the rotating shaft 7 and the flange cover 1201, small bearings 5 are disposed between the lower fixing cylinder 1203 and the bearings, and the housing 6 and the rotating shaft 7 are fixed by crimping.

In the fifth embodiment, the first step is,

an external rotor motor comprises the injection molding stator.

As shown in fig. 8, a large bearing 8 is disposed between the flange cap 1201 and the rotating shaft 7, the housing 6 and the rotating shaft 7 are connected into a whole through an injection molding disc, a plastic disc 1401 sleeved outside the rotating shaft 7 is disposed inside the plastic disc 14, and the plastic disc 1401 and the plastic disc 14 are integrated into a whole.

EXAMPLE six

As shown in fig. 9, in this embodiment, on the basis of the fifth embodiment, a small bearing 5 is arranged between the rotating shaft 7 and the installation.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An injection molded stator characterized by: including winding, iron core, control panel, installing support and plastic envelope casing, the winding twines in the iron core, the one end of installing support inserts in the iron core hole, the other end and the control panel cooperation of installing support, the plastic envelope casing includes the blind flange, goes up solid fixed cylinder and solid fixed cylinder down, the blind flange cover overlaps the outside at the installing support, the inside of blind flange is located to the control panel, go up solid fixed cylinder's upper end and blind flange even as an organic whole, go up solid fixed cylinder's lower extreme overcoat in the upper end of winding, gu fixed cylinder's upper end overlaps in the lower extreme that the winding is in down.

2. An injection molded stator as claimed in claim 1 wherein: the mounting bracket is of a tubular structure, a fixing column is arranged on one side of the mounting bracket, a shaft hole is formed in the middle of the control panel, a fixing groove is formed in the inner wall of the shaft hole, and the fixing groove is matched with the fixing column.

3. An injection molded stator according to claim 2 wherein: the lateral wall of the mounting bracket is provided with an outer boss, one side of the outer boss facing the control panel is provided with a locking column, and the control panel is provided with a connecting hole matched with the locking column.

4. An external rotor electric machine characterized in that: comprising an injection moulded stator according to any of claims 1-3.

5. An external rotor electric machine as claimed in claim 4, wherein: the middle part of the injection molding stator is provided with a rotating shaft, the outer part of the injection molding stator is sleeved with a shell, the inner wall of the shell is provided with a permanent magnet, and the permanent magnet is sleeved outside the iron core.

6. An external rotor electric machine as claimed in claim 5, wherein: big bearings are arranged between the rotating shaft and the flange cover and between the lower fixed cylinder and the bearing.

7. An external rotor electric machine as claimed in claim 6, wherein: the shell and the rotating shaft are connected into a whole through an injection molding disc.

8. An external rotor electric machine as claimed in claim 6, wherein: the bearing fixing device is characterized in that a large bearing is arranged between the rotating shaft and the flange cover, small bearings are arranged between the lower fixing barrel and the bearings, and the shell and the rotating shaft are fixed in a compression joint mode.

9. An external rotor electric machine as claimed in claim 5, wherein: the novel plastic disc is characterized in that a large bearing is arranged between the flange cover and the rotating shaft, the shell and the rotating shaft are connected into a whole through an injection molding disc, a plastic sleeve sleeved outside the rotating shaft is arranged on the inner side of the plastic disc, and the plastic sleeve and the plastic disc are of an integrated structure.

10. An external rotor electric machine as claimed in claim 9, wherein: and a small bearing is arranged between the rotating shaft and the mounting bracket.