CN202127311U

CN202127311U - Permanent magnet rotor of direct-current motor

Info

Publication number: CN202127311U
Application number: CN2011201958467U
Authority: CN
Inventors: 许新甲; 余晓华; 许炜
Original assignee: Guangdong Chigo Air Conditioning Co Ltd
Current assignee: Guangdong Chigo Air Conditioning Co Ltd
Priority date: 2011-06-13
Filing date: 2011-06-13
Publication date: 2012-01-25
Anticipated expiration: 2021-06-13

Abstract

The utility model discloses a permanent magnet rotor of a direct-current motor, which comprises an iron core and a shaft. The shaft of the rotor is arranged in the shaft hole of the iron core. An injector is arranged outside the iron core. A plurality of sintered ferrite magnetic tiles is embedded in the injector and distributed at the periphery of the iron core around the central axis of the iron core. In the utility model, because the iron core of the rotor and the sintered ferrite magnetic tiles are molded integrally by adopting the injecting and molding method, and the shaft of the rotor is selected according to the need to be installed and used, the manufacturing of the permanent magnet rotor is not restricted by injecting and molding equipment, the permanent magnet rotor can be used as both a permanent magnet rotor of single long shaft extension and a permanent magnet rotor of two dual shaft extension, and the permanent magnet rotor has a wide range of application. In addition, because the sintered ferrite magnetic tiles have strong magnetic performance, the magnetic performance of the permanent magnet rotor can be further improved, and hereby the efficiency of the motor can be effectively improved.

Description

A kind of direct current machine p-m rotor

Technical field

The utility model relates to technical field of motors, particularly a kind of direct current machine p-m rotor.

Background technology

In traditional direct current machine (especially brshless DC motor), its p-m rotor comprises armature spindle and moulds the magnetic body, when the method for employing injection moulding becomes shape magnetic body; Itself and armature spindle are fixed together; The permanent magnet rotor structure of this structure is comparatively simple, but also has simultaneously the part defective: (1) is if when longer armature spindle of motor needs or twin shaft are stretched armature spindle, owing to the restriction that receives injection-moulding device; The p-m rotor production difficulty of this structure is bigger, so its application also is restricted; (2) the p-m rotor magnetic property of this structure is lower, is unfavorable for improving electric efficiency.

The utility model content

The purpose of the utility model is to overcome the deficiency of prior art, and a kind of simple in structure, direct current machine p-m rotor that range of application is wider is provided.

The technical scheme of the utility model is: a kind of direct current machine p-m rotor; Comprise rotor core and armature spindle; Armature spindle is located in the axis hole of rotor core; The rotor core outside is provided with injection molding body, and injection molding body is embedded with a plurality of ferrite sintered body magnetic shoes, and the rotate axis of sub-iron core of a plurality of ferrite sintered body magnetic shoes is uniformly distributed in the rotor core periphery.

Said injection molding body is embedded with 8 measure-alike ferrite sintered body magnetic shoes.

Said ferrite sintered body magnetic shoe is eccentric magnetic shoe.

Said armature spindle is that single shaft is stretched structure or twin shaft is stretched structure.

The material of said injection molding body is engineering plastics.

When this direct current machine p-m rotor is made; In the process of the method moulding injection molding body that adopts injection moulding; A plurality of ferrite sintered body magnetic shoes of arranging are embedded in the injection molding body simultaneously; Injection molding body packs tightly in the rotor core outside simultaneously, selects required armature spindle type then, and itself and rotor core mount are got final product.

The utility model has following beneficial effect with respect to prior art:

This direct current machine p-m rotor is owing to adopt the method for injection moulding that rotor core and ferrite sintered body magnetic shoe are shaped to one earlier; Select armature spindle to install and use again as required; Therefore, the manufacturing of p-m rotor is not limited by injection-moulding device, can be applicable to the long single shaft of armature spindle and stretches p-m rotor; Also can be applicable to twin shaft and stretch p-m rotor, its range of application is wider.Simultaneously, because the magnetic property of ferrite sintered body magnetic shoe is stronger, therefore also can further improves the magnetic property of p-m rotor, thereby effectively improve electric efficiency.

Description of drawings

Fig. 1 is the structural representation of the p-m rotor of embodiment one.

Fig. 2 is the structural representation of the p-m rotor of embodiment two.

Fig. 3 is the structural representation of single ferrite sintered body magnetic shoe.

Fig. 4 is that A among Fig. 3 is to view.

Fig. 5 is the structural representation of rotor core.

Fig. 6 is the B-B view among Fig. 5.

Fig. 7 is the structural representation after rotor core and the injection mo(u)lding of ferrite sintered body magnetic shoe.

Fig. 8 is that C-C among Fig. 7 is to view.

Embodiment

Below in conjunction with embodiment and accompanying drawing, the utility model is done further to specify, but the execution mode of the utility model is not limited thereto.

Embodiment one

A kind of direct current machine p-m rotor of present embodiment; Its structure is as shown in Figure 1, comprises rotor core 1 and armature spindle 2, and armature spindle 2 is located in the axis hole of rotor core 1; Rotor core 1 outside is provided with injection molding body 3; Injection molding body 3 is embedded with a plurality of ferrite sintered body magnetic shoes 4, and like Fig. 7 or shown in Figure 8, the rotate axis of sub-iron core 1 of a plurality of ferrite sintered body magnetic shoes 4 is uniformly distributed in rotor core 1 periphery.

As shown in Figure 3, injection molding body 1 is embedded with 8 measure-alike ferrite sintered body magnetic shoes 4.

Ferrite sintered body magnetic shoe 4 is eccentric magnetic shoe, its concrete structure such as Fig. 3 or shown in Figure 4.The concrete structure of rotor core such as Fig. 5 or shown in Figure 6.

In the present embodiment, armature spindle 2 is stretched structure for single shaft, and the p-m rotor of this structure can be applicable to the situation that motor needs longer armature spindle.

The material of injection molding body 3 is engineering plastics.

When this direct current machine p-m rotor is made; In the process of the method moulding injection molding body 3 that adopts injection moulding; A plurality of ferrite sintered body magnetic shoes 4 of arranging are embedded in the injection molding body 3 simultaneously; Injection molding body 3 packs tightly in rotor core 1 outside simultaneously, selects required armature spindle 2 types then, and itself and rotor core 1 mount are got final product.

Embodiment two

A kind of direct current machine p-m rotor of present embodiment, its structure is as shown in Figure 2, compares with embodiment one, and its difference is that armature spindle 2 is stretched structure for twin shaft, and the p-m rotor of this structure can be applicable to motor needs twin shaft to stretch the situation of armature spindle.

As stated, can realize preferably that just the utility model, the foregoing description are merely the preferred embodiment of the utility model, be not the practical range that is used for limiting the utility model; Be that all equalizations of being done according to the utility model content change and modification, all contained by the utility model claim scope required for protection.

Claims

1. direct current machine p-m rotor; Comprise rotor core and armature spindle; Armature spindle is located in the axis hole of rotor core, it is characterized in that, the rotor core outside is provided with injection molding body; Injection molding body is embedded with a plurality of ferrite sintered body magnetic shoes, and the rotate axis of sub-iron core of a plurality of ferrite sintered body magnetic shoes is uniformly distributed in the rotor core periphery.

2. according to the said a kind of direct current machine p-m rotor of claim 1, it is characterized in that said injection molding body is embedded with 8 measure-alike ferrite sintered body magnetic shoes.

3. according to the said a kind of direct current machine p-m rotor of claim 1, it is characterized in that said ferrite sintered body magnetic shoe is eccentric magnetic shoe.

4. according to the said a kind of direct current machine p-m rotor of claim 1, it is characterized in that said armature spindle is that single shaft is stretched structure or twin shaft is stretched structure.

5. according to the said a kind of direct current machine p-m rotor of claim 1, it is characterized in that the material of said injection molding body is engineering plastics.