CN201726018U

CN201726018U - Double carbon brush structure of brushed motor

Info

Publication number: CN201726018U
Application number: CN2010201999212U
Authority: CN
Inventors: 吕飞剑
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-24
Filing date: 2010-05-24
Publication date: 2011-01-26
Anticipated expiration: 2020-05-24

Abstract

The utility model discloses a double carbon brush structure of a brushed motor, which comprises a motor commutator, a first carbon brush, a second brush, a first elastic part, a second elastic part, a pin shaft and a poking button, wherein the first carbon brush and the second carbon brush are arranged side by side along axial direction. The pin shaft is installed between the first carbon brush and the second carbon brush. One end of the poking button is movably installed on the pin shaft, and the other end is hung in the air. The front end surface of the first carbon brush contacts the motor commutator under the action of the first elastic part. The front end of the second carbon brush supports one side of the floating end of the poking button under the action of the second elastic part. The other side of the floating end of the poking button supports the lateral surface of the first carbon brush. The double carbon brush structure is provided with two carbon brushes which work in turn and contact the different surfaces of the motor commutator when in use. As a result, the frequency to replace the carbon brush and many troubles caused by the replacement can be reduced on one hand, and on the other hand, the problem of surface asperity caused by the frequent contact with the same surface can be solved, thereby effectively prolonging the service life of the motor.

Description

A kind of two carbon brush structures of brush motor

Technical field:

The utility model relates to machine field, particularly a kind of two carbon brush structures of brush motor.

Background technology:

Existing brush motor generally only has a carbon brush, during work, carbon brush contacts with engine commutator and constantly wearing and tearing, after having worn and torn, this carbon brush must change another new carbon brush, the shortcoming of this structure is that carbon brush is changed relatively frequent, many troubles have been brought thus, and since each when changing carbon brush carbon brush be installed in same position, this just makes carbon brush contact with the same surface of engine commutator all the time when work, cause the contact-making surface roughening easily after time is long and accelerate the rate of wear of carbon brush, thereby had a strong impact on the useful life of motor.

The utility model content:

Goal of the invention of the present utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of and can reduce two carbon brush structures that carbon brush is changed frequency, improved the brush motor in motor useful life.

In order to realize the foregoing invention purpose, the utility model has adopted following technical scheme:

A kind of two carbon brush structures of brush motor, comprise engine commutator, first carbon brush, second carbon brush, first elastic component, second elastic component, bearing pin and toggle, wherein, first carbon brush and second carbon brush are axially and are arranged side by side, bearing pin is installed between first carbon brush and second carbon brush, toggle one end is movably arranged on the bearing pin, the other end is unsettled, first carbon brush its front end face under the effect of first elastic component contacts with engine commutator, second carbon brush side of its front end and toggle free end under the effect of second elastic component is replaced, and the side of the opposite side of toggle free end and first carbon brush is replaced.

The effective length of described second carbon brush is shorter than described first carbon brush.

The side that the described toggle free end and the second carbon brush front end are replaced is provided with a protuberance, and this protuberance is replaced on the front end face of described second carbon brush.

Also comprise the first carbon brush chamber and the second carbon brush chamber, it is indoor that described first carbon brush and second carbon brush are installed in this two carbon brush respectively.

Described first elastic component and second elastic component are disc spring, and the both is installed on the disc spring frame, and both free ends are replaced with the tail end of first carbon brush and second carbon brush respectively.

The utility model has following advantage with respect to prior art:

Because two carbon brush that connect the work of passing are installed, be that one of them carbon brush contacts work with engine commutator earlier, after this elder generation's contact carbon brush has worn and torn, another carbon brush contacts with engine commutator and works on, after also having worn and torn, back contact carbon brush just needs to change again new carbon brush, prolong the service time of carbon brush behind each replacing carbon brush for this reason significantly, and then also reduced the frequency that carbon brush changes and many troubles of bringing thus.And since two carbon brush be axially and be arranged side by side, contact with the different surfaces of engine commutator respectively during its work, thereby can solve same surface because of contacting the rough surface problem that frequently causes, make the carbon brush wearing and tearing be tending towards normal wear, and then effectively improve the useful life of motor.

Description of drawings:

Fig. 1 is the schematic perspective view of the two carbon brush structures of the utility model brush motor.

Fig. 2 is the local enlarged diagram at A place among Fig. 1.

Fig. 3 is the end view of the two carbon brush structures of the utility model brush motor.

Fig. 4 is the schematic perspective view after first carbon brush has worn and torn in the two carbon brush structures of the utility model brush motor.

Embodiment:

Referring to Fig. 1 to Fig. 4, the two carbon brush structures of the brush motor that provides according to the utility model, comprise engine commutator 1, first carbon brush 2, second carbon brush 3, the first carbon brush chamber 8, the second carbon brush chamber 9, first elastic component 4, second elastic component 5, bearing pin 6 and toggle 7, wherein, first carbon brush 2 and second carbon brush 3 are and axially are arranged side by side and are installed in first respectively, the second carbon brush chamber 8, in 9, bearing pin 6 is installed between first carbon brush 2 and second carbon brush 3, toggle 7 one ends are movably arranged on the bearing pin 6, the other end is unsettled, first carbon brush 2 its front end face under the effect of first elastic component 3 contacts with engine commutator 1, second carbon brush 3 side of its front end and toggle 7 free ends under the effect of second elastic component 5 is replaced, and the opposite side of toggle 7 free ends and the side of first carbon brush 2 are replaced.

The effective length of described second carbon brush 3 is shorter than described first carbon brush 2, and the side that toggle 7 free ends and second carbon brush, 3 front ends are replaced is provided with a protuberance 71, and this protuberance 71 is replaced on the front end face of second carbon brush 3.

Described first elastic component 4 and second elastic component 5 are disc spring, and the both is installed on the disc spring frame 10, and both free ends replace with the tail end of first carbon brush 2 and second carbon brush 3 respectively, thus the active force that first carbon brush 2 and second carbon brush 3 are formed forward.

Operation principle of the present utility model is: during work, at first be that first carbon brush 2 contacts with engine commutator 1, make electrical power work, at this moment, second carbon brush 3 can not contact with engine commutator 1 owing to stopping of toggle 7, after work proceeds to the regular hour, first carbon brush 2 can be worn and torn by engine commutator 1, when the curtailment of first carbon brush 2 to block the moment of toggle 7, toggle 7 can be because the indirectly-acting power of second elastic component 5, rotate around bearing pin 6, and second carbon brush 3 is also owing to the active force of second elastic component 5 contacts with engine commutator 1.In this process, because first carbon brush 2 contacts with the different surfaces of engine commutator 1 respectively with second carbon brush 3, being equivalent to a motor has two secondary carbon brush to use, and the effective length of the second secondary carbon brush is short slightly, so, this structure can be under the prerequisite that increases a small amount of cost, the useful life of effectively improving motor 50～70%.

Claims

1. two carbon brush structures of a brush motor, comprise engine commutator (1), it is characterized in that: also comprise first carbon brush (2), second carbon brush (3), first elastic component (4), second elastic component (5), bearing pin (6) and toggle (7), wherein, first carbon brush (2) and second carbon brush (3) are axially and are arranged side by side, bearing pin (6) is installed between first carbon brush (2) and second carbon brush (3), toggle (7) one ends are movably arranged on the bearing pin (6), the other end is unsettled, first carbon brush (2) its front end face under the effect of first elastic component (3) contacts with engine commutator (1), second carbon brush (3) side of its front end and toggle (7) free end under the effect of second elastic component (5) is replaced, and the opposite side of toggle (7) free end and the side of first carbon brush (2) are replaced.

2. two carbon brush structures of brush motor according to claim 1, it is characterized in that: the effective length of described second carbon brush (3) is shorter than described first carbon brush (2).

3. two carbon brush structures of brush motor as claimed in claim 1 or 2, it is characterized in that: the side that described toggle (7) free end and second carbon brush (3) front end are replaced is provided with a protuberance (71), and this protuberance (71) is replaced on the front end face of described second carbon brush (3).

4. two carbon brush structures of brush motor as claimed in claim 1 or 2, it is characterized in that: also comprise the first carbon brush chamber (8) and the second carbon brush chamber (9), it is indoor that described first carbon brush (2) and second carbon brush (3) are installed in this two carbon brush respectively.

5. two carbon brush structures of brush motor as claimed in claim 1 or 2, it is characterized in that: described first elastic component (4) and second elastic component (5) are disc spring, the both is installed on the disc spring frame (10), and both free ends are replaced with the tail end of first carbon brush (2) and second carbon brush (3) respectively.