CN102447367A

CN102447367A - Brushed motor

Info

Publication number: CN102447367A
Application number: CN2010105012204A
Authority: CN
Inventors: 刘力生; 刘宝廷; 方传惠; 关亮
Original assignee: Johnson Electric Shenzhen Co Ltd
Current assignee: Guangdong Dechang Motor Co.,Ltd.
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2012-05-09
Anticipated expiration: 2030-09-30
Also published as: CN102447367B

Abstract

The invention relates to a brushed motor comprising a stator and a rotor. The rotor comprises a circular bracket, an iron core fixed at periphery of a bracket and a winding fixed on surface of the iron core. The stator comprises a shell, a magnet fixed on the shell and an electric brush assembly fixed relatively to the shell. The electric brush assembly comprises several electric brushes. The magnet is faced to the winding. The electric brushes and the winding are in slidable contact for reversing the winding. In the motor of the invention, each turn of coil of the winding is a component with small reversing potential to have best reversing effect. Component number (turn number) between two poles is large, that is to say, the voltage between commutator strips is small to have small potential or current pulsation. A commutator is saved, thus the motor structure is simpler, the axial size is more compact, the weight is light and the cost is low.

Description

Brush motor

Technical field

The present invention relates to a kind of brush motor.

Background technology

Motor has brush and brushless branch.

Shown in Figure 7 is present general a kind of brush motor, and it comprises stator and rotor.Rotor comprises rotating shaft 11, be fixed in iron core 12 and commutator 13 in the rotating shaft 11, be wound in the winding (figure does not show) on unshakable in one's determination 12, and winding is electrically connected with commutator 13, and iron core and winding winding and commutator 13 on it axially is arranged side by side along rotating shaft.Stator comprises iron-clad 14, be fixed to the magnet 15 of iron-clad 14 inner surfaces, be fixed to some carbon brush (figure does not show) of stator end cap, thereby carbon brush is used for and the commutator sliding contact realizes switching-over.

Yet, above-mentioned brush motor commonly used, winding and commutator 13 unshakable in one's determination and that twine on it axially are arranged side by side the rotor axial longer dimension along rotating shaft; And commutator is made complicated, and cost is high, when same brush contacts adjacent commutator segment, causes two adjacent commutator segment short circuits, produces bigger commutation spark.

The present invention aims to provide a kind of novel brush motor.

Summary of the invention

The present invention provides a kind of brush motor; Comprise stator and rotor; Said rotor comprises ring-shaped core and is fixed in lip-deep conductor unshakable in one's determination, and said stator comprises housing, is fixed in magnet and the fixing brush assembly of electric of relative housing on the housing, and said brush assembly of electric comprises some brushes; Said magnet is towards conductor, and said brush is used for contacting with conductors slide.

Preferably, said magnet comprises some magnetic poles that circumferentially are provided with at interval along motor, establishes the gap between the adjacent pole, and said brush is arranged at respectively in the corresponding gap.

Preferably, be provided with an elastic device in each gap and be used for the location between magnetic pole.

Preferably, said housing is established some radial direction through hole and is passed through for brush.

Preferably, said brush assembly of electric comprises the fixing installing rack of relative housing, the brush box of plurality of fixed to installing rack, and said each brush carrier is mounted to the respective through hole place of housing, and each brush is contained in the corresponding brush box.

Preferably, said stator comprises that also two are fixed to the end cap at housing two ends respectively, and said installing rack is held between the end of wherein an end cap and housing.

Preferably, said conductor is the winding by the lead coiled of tape insulation layer.

Preferably, said winding comprises interior outer double-layer structure.

Preferably, said motor is an inner-rotor-type, and said rotor also comprises a ring support, and said iron core is fixed to the outer surface of said support.

Preferably, said motor is an external-rotor-type, and said rotor also comprises a ring support, and said iron core is fixed to the inner surface of said support.

Embodiment that the present invention lifts has following beneficial effect: every circle coil of winding is an element, and minimum commutating potential is arranged, thereby has best switching-over effect; Two interpolar parts numbers (number of turn) are more, and it is very little to be equivalent to commutator segment voltage; Very little electromotive force or current pulsation are arranged; Omitted commutator, thus simple in structure, axial dimension is compacter, in light weight, cost is low.

In order further to understand characteristic of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet institute's accompanying drawing only provide reference and the explanation usefulness, be not to be used for the present invention is limited.

Description of drawings

In the accompanying drawing:

Fig. 1 is the exploded perspective view of the brush motor of one embodiment of the invention;

Fig. 2 is the assembling sketch map of brush motor shown in Figure 1;

Fig. 3 is the sketch map after brush motor shown in Figure 2 is removed stator case and end cap;

Fig. 4 is the schematic perspective view of the stator case of brush motor shown in Figure 2;

Fig. 5 is the sketch map after brush motor shown in Figure 2 is removed stator case, end cap and magnet;

Fig. 6 is the part exploded perspective view of brush motor shown in Figure 2;

Shown in Figure 7 is a kind of brush motor of prior art.

Embodiment

Below in conjunction with accompanying drawing, describe in detail through specific embodiments of the invention, will make technical scheme of the present invention and other beneficial effects obvious.

Fig. 1 is the exploded perspective view of the brush motor of one embodiment of the invention; Fig. 2 is the assembling sketch map of brush motor shown in Figure 1.

Please refer to Fig. 1 to Fig. 3, brush motor 20 of the present invention comprises stator 30, rotor 50.

Said stator 30 comprises cylindrical housings 32, is fixed in the magnet 34 of housing 32 inwalls and the brush assembly of electric 36 that relative housing 32 is fixed, and said brush assembly of electric 36 comprises some brushes 362 (seeing also Fig. 5).

Said rotor 50 rotatably is contained in the stator 30, comprise ring support 52, be fixed in support 52 outer surfaces ring-shaped core 54, be located at conductor 56 on 54 outer surfaces unshakable in one's determination, the fixing rotating shaft 58 of support 52 relatively.Said support 52 central authorities establish through hole and pass through for rotating shaft 58.Preferably, said conductor 56 is a winding, and said winding 56 comprises interior outer double-layer structure, can be by being bent into double-deck arcuate structure again behind the continuous coiled of the lead of a tape insulation layer, and then be fixed on unshakable in one's determination 54 the outer surface, the coiling process is easy.

Said magnets of stator 34 is towards rotor winding 56, but has radial air gap between the two so that the rotation of rotor relative stator, and said brush 362 is used for and winding 56 sliding contacts, to realize switching-over.

Preferably, said magnet 34 comprises the magnetic pole that some edges circumferentially are provided with at interval, establishes gap 38 (see figure 1)s between the adjacent pole, and said brush 362 is arranged at respectively in the corresponding gap 38.Particularly, in the present embodiment, said motor comprises 6 magnetic poles and 6 brushes.

See also Fig. 3, be provided with an elastic device 39 in each gap 38 and be used for the circumferential location between magnetic pole like the U-shaped shell fragment.

See also Fig. 4, said housing 32 is established some radial direction through hole 322 and is passed through for brush.Preferably, said through hole 322 is for being arranged at the breach of housing 32 feather edges, and the breach number is corresponding with the brush number.

Said stator 30 also comprises two end cap 40,42 (see figure 1)s, is mounted to two axial ends of cylindrical housings 32 respectively.Preferably, establish bayonet socket 402,422 on the said

end cap

40,42, fixture block 324,326 is established at housing 32 two ends, snaps in respectively in the bayonet socket 402,422 of end cap 40,42.Can establish fluting on the fixture block 326, accommodate to bayonet socket 422, thereby can its flexural deformation fixed end cap 42 and housing 32 in fluting place punching press fixture block 326 at fixture block 326.

See also Fig. 5 and Fig. 6, said brush assembly of electric 36 comprise annular installing rack 364, plurality of fixed to installing rack 364 brush box 366, be installed in the brush 362 in each brush box 366.Said installing rack 364 is held between the axial end of wherein an end cap 40 and housing 32 and is fixed.Be contained in the corresponding magnetic pole gap 38 after the respective through hole 322 of each brush box 366 through housing 32.One elastic device can be arranged between brush 362 ends and the brush box 366, is used to impel the front end contact-making surface of brush 362 to contact with winding.

The brush motor that the front is described is an inner-rotor-type, that is: rotor is positioned at stator.Be appreciated that ground; Brush motor of the present invention also can be external-rotor-type, that is: stator is positioned at stator, at this moment; The adjustable positions of rotor critical piece is whole to be: magnets of stator is fixed in the outer surface of housing; The inner surface of annular pivoted frame is fixed in rotor core, and winding is fixed in inner surface unshakable in one's determination, and the periphery that is centered around magnet is also relative with it.

Brush motor of the present invention can be applicable to various occasions, especially axial dimension is required relatively harsher occasion, as can be used as the cooling fan motor of automobile engine.

The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims

1. brush motor; Comprise stator and rotor, it is characterized in that said rotor comprises ring-shaped core and is located at lip-deep conductor unshakable in one's determination; Said stator comprises housing, is fixed in magnet and the fixing brush assembly of electric of relative housing on the housing; Said brush assembly of electric comprises some brushes, and said magnet is towards conductor, and said brush is used for contacting with conductors slide.

2. brush motor as claimed in claim 1 is characterized in that, said magnet comprises some magnetic poles that circumferentially are provided with at interval along motor, establishes the gap between the adjacent pole, and said brush is arranged at respectively in the corresponding gap.

3. brush motor as claimed in claim 2 is characterized in that, is provided with an elastic device in each gap and is used for the location between magnetic pole.

4. brush motor as claimed in claim 1 is characterized in that said housing is established some radial direction through hole and passed through for brush.

5. brush motor as claimed in claim 4; It is characterized in that; Said brush assembly of electric comprises the fixing installing rack of relative housing, the brush box of plurality of fixed to installing rack, and said each brush carrier is mounted to the respective through hole place of housing, and each brush is contained in the corresponding brush box.

6. brush motor as claimed in claim 5 is characterized in that, said stator comprises that also two are fixed to the end cap at housing two ends respectively, and said installing rack is held between the end of wherein an end cap and housing.

7. brush motor as claimed in claim 1 is characterized in that, said conductor is the winding by the lead coiled of tape insulation layer.

8. brush motor as claimed in claim 7 is characterized in that said winding comprises interior outer double-layer structure.

9. like each described brush motor of claim 1 to 8, it is characterized in that said motor is an inner-rotor-type, said rotor also comprises a ring support, and said iron core is fixed to the outer surface of said support.

10. like each described brush motor of claim 1 to 8, it is characterized in that said motor is an external-rotor-type, said rotor also comprises a ring support, and said iron core is fixed to the inner surface of said support.