CN2398747Y

CN2398747Y - Rolling electric brush

Info

Publication number: CN2398747Y
Application number: CN 99246037
Authority: CN
Inventors: 魏超
Original assignee: ANPULI BIOTECHNOLOGY Co Ltd XIAMEN
Current assignee: ANPULI BIOTECHNOLOGY Co Ltd XIAMEN
Priority date: 1999-09-30
Filing date: 1999-09-30
Publication date: 2000-09-27
Anticipated expiration: 2009-09-30

Abstract

The utility model relates to a rolling electric brush, which belongs to the technical field of electrical conduction and is suitable for DC motor with a brush. The utility model is composed of a hollow cylindrical carbon brush body, a copper sleeve and a rolling bearing, wherein, the hollow cylindrical carbon brush body is fixed and sheathed on the copper sleeve in which the rolling bearing is arranged. The rolling electric brush overcomes the defect of low reliability and short service life of the DC motor with a brush, has other excellent performances of a DC motor with no brushes, and improves the performance / cost ratio.

Description

Roller brushes

The utility model belongs to the conductivity technical field, relates to a kind of roller brushes, and it has been applicable to the brush DC motor.

Conventional DC motor must have commutator and brush, be the brush motor, the fit structure of its commutator and brush as shown in Figure 3, brush is a rectangle carbon brush body 1 ', be arranged on the brush carriage 4, contact with commutator 7 by the contact of spring 5, use the commutation that realizes each element of armature winding.Because for sliding friction, promptly the two produces relative displacement in the conductivity process between commutator and the brush, the wearing and tearing that produce are big each other, and institute is so that the shortening in useful life of brush; Simultaneously, also because sliding friction produces relative displacement, if use or during the high rotating speed of motor, very easily accumulate heat for a long time, so, reduced the reliability of use; In a word, the wearing and tearing between commutator and the brush are the main causes that have the brush motor to break down easily.

Current, people have developed brushless DC motor, it is to adopt semiconductor switch device to realize electronic commutation, mechanical commutator and brush have been cancelled, overcome the shortcoming that brush DC motor reliability is low, the life-span is short has been arranged, and have often maintenance and repair, do not have electric contact sparking, mechanicalness noise is low, can work in high vacuum and impedance dielectric environment, premium properties such as can work under high rotating speed, but, it must with certain supporting use of electronic commutation circuit, overall cost height, the ratio of performance to price is low.

The purpose of this utility model is to provide a kind of roller brushes, to have overcome the shortcoming that brush DC motor reliability is low, the life-span is short is arranged, and has other many premium properties that brushless DC motor has concurrently, improves the ratio of performance to price.

For achieving the above object, solution of the present utility model is:

Roller brushes is made up of hollow cylinder carbon brush body, copper sheathing and rolling bearing, and hollow cylinder carbon brush body fixedly is nested with on copper sheathing, and rolling bearing is arranged in the copper sheathing.

After adopting said structure, the utility model roller brushes is that the rotating shaft by rolling bearing mounts on brush carriage.

In the conductivity process, particularly motor commutator is subjected in the electric process, be rolling friction between commutator and the utility model roller brushes, produce relative displacement hardly, the wearing and tearing that produce are very little each other, so prolonged the useful life of brush, under identical operational environment, the utility model roller brushes is than the common long 5-10 of brush life times that the brush motor is arranged.Simultaneously, rolling friction produces heat hardly, so, improved the reliability of using.In addition, because roller brushes increases often maintenance and repair useful life.

In sum, the utility model has only changed the fixing basic structure of brush, promptly comes into operation.It has not only overcome the shortcoming that brush DC motor reliability is low, the life-span is short, and has other plurality of advantages that brushless DC motor has, and overall performance is near brushless motor, and the ratio of performance to price is considerably beyond brushless motor.

Below in conjunction with drawings and Examples, the utility model done describing in further detail.

Fig. 1 is the utility model perspective view;

Fig. 2 is the utility model user mode figure;

Fig. 3 commonly uses product user mode figure.

See also shown in Figure 1ly, the utility model roller brushes is made up of hollow cylinder carbon brush body 1, copper sheathing 2 and rolling bearing 3.

Hollow cylinder carbon brush body 1 fixedly is nested with on copper sheathing 2, and rolling bearing 3 is arranged in the copper sheathing 2.

Cooperate shown in Figure 2ly, roller brushes is that the rotating shaft 31 by rolling bearing 3 mounts on the carriage 41, thereby is fixed on the brush carriage 4.Carriage 41 is connected with lead-out wire 6.

Roller brushes contacts with commutator 7 by the contact of spring 5, uses the commutation that realizes each element of armature winding.

Claims

1, roller brushes is characterized in that: be made up of hollow cylinder carbon brush body, copper sheathing and rolling bearing, hollow cylinder carbon brush body fixedly is nested with on copper sheathing, and rolling bearing is arranged in the copper sheathing.