CN202276051U

CN202276051U - Motor brush holder

Info

Publication number: CN202276051U
Application number: CN2011204083626U
Authority: CN
Inventors: 张铁军; 陈宏伟
Original assignee: SHANDONG BETTER MOTOR CO Ltd
Current assignee: SHANDONG BETTER MOTOR CO Ltd
Priority date: 2011-10-24
Filing date: 2011-10-24
Publication date: 2012-06-13
Anticipated expiration: 2021-10-24

Abstract

The utility model relates to a brush holder device used on a series-wound motor. The utility aims to provide a motor brush holder which has the advantages of simple structure and favorable ventilation/heat dissipation effect and prevents the choking phenomenon between the carbon brush and the brush holder. The motor brush holder comprises a brush holder body in a box body structure with an opening at one end, wherein the brush holder body is provided with a plurality of vent holes. The carbon brush directly contacts the outside air through the vent holes in the brush holder body, so that the carbon brush can be cooled instantly and can not be choked due to expansion caused by overhigh temperature. As an improvement, the side wall on the brush holder body near the outlet end of the carbon brush is provided with a cambered part which protrudes outwards. By adopting the cambered structure which protrudes outwards, the contact area of the electric brush and the brush holder is reduced on the premise that the brush holder body does not influence the matching of the electric brush and the brush holder, thereby lowering the choking risk due to carbon brush deformation at the brush holder outlet.

Description

The motor brush carrier

Technical field

The utility model relates to a kind of brush-holding device that is used on the series-wound motor.

Background technology

The structure of common in the market series-wound motor brush-holding device; Except the carbon brush exit, remainder is the closed chamber body structure, like Fig. 1, shown in Figure 2; The thermal coefficient of expansion of carbon brush 4 ' that is positioned at brush carrier 1 ' cavity when using is greater than the thermal coefficient of expansion of metal brush carrier 1 '; Thereby temperature raises behind carbon brush 4 ' work certain hour, and the carbon brush 4 ' of high temperature expands at brush carrier 1 ' inner chamber and causes the generation of " stuck " phenomenon easily, thereby has increased the risk of " burning machine "; In addition; Carbon brush 4 ' exit 3 ' is linear structure on the above-mentioned brush carrier 1 ' inner chamber; Causing exit 3 ' intensity to be hanged down is prone to deform; Also can cause carbon brush 4 ' " stuck " phenomenon even " burning machine " to take place moving to brush carrier 1 ' exit position 3 ' when locating, thereby the motor reliability of operation is lower.

The utility model content

The technical problem that the utility model will solve provide a kind of simple in structure, result of ventilating heat dissipation good, prevent the motor brush carrier that carbon brush and brush carrier " stuck " phenomenon take place.

The utility model motor brush carrier comprises the brush carrier main body of the body structure of an end opening offering some ventilation holes on the said brush carrier main body.

The utility model motor brush carrier; On the brush carrier main body, offer after some ventilation holes; After carbon brush was fit in the brush carrier main body inner chamber, carbon brush was in the energising course of work, because the extraneous air air communication is crossed the ventilation hole of offering on the brush carrier main body and directly contacted with carbon brush; Thereby can lower the temperature to carbon brush, thereby make carbon brush be unlikely to expand " stuck " even cause the problem of motor " burning machine " because of working temperature is too high in the very first time.

The utility model motor brush carrier, the sidewall near the carbon brush port of export on the wherein said brush carrier main body is provided with the curved portions to outer lug.Adopt this curved portions structure to outer lug; Make the brush carrier main body not influence the contact area that has reduced brush and brush carrier under brush and the prerequisite that brush carrier cooperates; And curved portions is adding man-hour because flow harden makes its intensity increase; Thereby increased brush carrier export department or even the distortion-free ability of whole brush carrier, be out of shape the risk that causes " stuck " because of carbon brush thereby further reduced the brush carrier exit.

Be described further below in conjunction with the motor brush carrier of accompanying drawing the utility model.

Description of drawings

Fig. 1 is the front view of motor brush carrier of the prior art;

Fig. 2 among Fig. 1 along the cutaway view (position of carbon brush illustrates in the drawings during use) of A-A line direction;

Fig. 3 is the front view of the utility model motor brush carrier;

Fig. 4 is the upward view of the utility model motor brush carrier;

Fig. 5 is along the cutaway view of B-B direction among Fig. 3;

The master that Fig. 6 cooperates with carbon brush for the utility model motor brush carrier looks cutaway view.

Embodiment

The utility model motor brush carrier; As shown in Figure 3; The brush carrier main body 1 that comprises the body structure of an end opening; Offer some ventilation holes 2 on the brush carrier main body 1, in conjunction with Fig. 4, shown in Figure 5, the sidewall near carbon brush 4 (the combining shown in Figure 6) port of export on the brush carrier main body 1 is provided with the curved portions 3 to outer lug.

The utility model motor brush is held in when using, and is as shown in Figure 6, after brush carrier main body 1 one ends are fixing; Carbon brush 4 is installed in brush carrier main body 1 inner chamber through the compression spring, and during motor work, stator current flows to carbon brush 4; Contact with commutator copper bar 5 through carbon brush 4, electric current flows to commutator copper bar 5 again, because commutator copper bar 5 runs up and electric current makes carbon brush 4 heatings when flowing through carbon brush 4; The temperature of carbon brush 4 raises, but owing on brush carrier main body 1 inner chamber, offered some ventilation holes 2, thereby make carbon brush 4 directly contact with extraneous air; The very first time is aeration-cooling to carbon brush 4, makes the temperature of carbon brush 4 be unlikely to too high and in brush carrier main body 1 exit " stuck "; In addition; The utility model also is provided with the curved portions 3 to outer process on a pair of opposing sidewalls of carbon brush 4 exit positions on the brush carrier main body 1 when implementing; The prerequisite that is provided with of curved portions 3 is not influence cooperating of carbon brush 4 and brush carrier main body 1; Because this curved portions 3 flow harden when punch process, thereby the increase of the intensity of curved portions 3, thereby also make the anti-deformation ability of brush carrier exit position strengthen; Further reduced the generation of " stuck " phenomenon that the brush carrier exit position causes because of carbon brush 4 distortion; And owing to be provided with the curved portions 3 to outer lug, thereby air can also have been strengthened the cooling anti-deformation to carbon brush 4 to a certain extent from curved portions 3 circulations on carbon brush 4 port of export positions.

Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technical scheme of the utility model all should fall in the definite protection range of the utility model claims.

Claims

1. motor brush carrier comprises it is characterized in that the brush carrier main body of the body structure of an end opening: offer some ventilation holes on the said brush carrier main body.

2. motor brush carrier according to claim 1 is characterized in that: the sidewall near the carbon brush port of export on the said brush carrier main body is provided with the curved portions to outer lug.