Carbon brush and brush holder applied to small direct current motor

Abstract

The utility model provides a carbon brush and a brush holder applied to a small DC motor. The carbon brush and the brush holder comprise a carbon brush, a brush holder, a carbon tube and a spring. The carbon brush is located in the carbon tube, one end of the carbon brush extends outwards and abuts against the commutator, and the other end of the carbon brush is connected with the spring. The brush carrier is positioned on one side of the carbon tube and is fixedly connected with the carbon tube; the spring is positioned between the brush holder and the carbon brush, and two ends of the spring are fixedly connected with the carbon brush and the brush holder respectively; wherein the length of the carbon brush is two to three times of the width of the carbon brush. According to the carbon brush and the brush holder applied to the small direct current motor, the service life is prolonged by increasing the length of the carbon brush, in order to increase the length in the original space, the original bent brush holder is changed into the linear brush holder, and the carbon tube is used for bearing the carbon brush, so that the service life is further prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a carbon brush and brush holder applied to small direct current motor. BACKGROUND

[0002] At present, motor as common electrical appliance has been widely used in the market, is widely used in household appliances and automobile field, including dust catcher such as daily household appliances, therefore motor demand develops to smaller size, lighter weight and longer life.

[0003] Especially for the use of dust catcher, the direct current motor increases the service life of the motor as far as possible under the premise of not increasing the size of the motor, thereby improving the market share, and the traditional method cannot be considered, and although the length of the carbon brush can improve the service life, it means that the brush holder of the motor needs to be increased, which further leads to the increase of the space required by the motor, and the consideration cannot be made. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a carbon brush and brush holder applied to small direct current motor, improve the structure of carbon brush and brush holder, increase the length of carbon brush under the premise of not changing the size of traditional motor, improve the service life, increase the length of carbon brush in traditional space by increasing spring in brush holder, change the initial running-in mode of carbon brush and commutator, reduce the appearance of spark, and further improve the service life.

[0005] To solve the above problems, the utility model provides a carbon brush and brush holder applied to small direct current motor adopts the following technical scheme:

[0006] A carbon brush and brush holder applied to small direct current motor, including carbon brush, brush holder, carbon tube and spring, the carbon brush is located in the carbon tube, one end extends outward and is in contact with the commutator, and one end is connected with the spring, the brush holder is located on one side of the carbon tube and is fixedly connected with the carbon tube, the spring is located between the brush holder and the carbon brush, and both ends are fixedly connected with the carbon brush and the brush holder respectively,

[0007] The length of the carbon brush is two to three times of its width.

[0008] Further, the brush holder is "L" shaped, the spring is connected to the center position, and the two ends extending outward are provided with connecting holes for fixedly connecting the brush holder.

[0009] Further, the side of the brush holder is provided with a lug plate matched with the carbon tube for bearing the spring.

[0010] Further, one end of the carbon brush is provided with a contact arc surface, and the contact arc surface is in contact with the commutator.

[0011] Further, the abutting arc surfaces are arranged on the surface of one end of the carbon brush.

[0012] Further, the abutting arc surfaces are arranged on the surface of one end of the carbon brush.

[0013] Further, the carbon tube wraps the spring and the carbon brush, and one end of the carbon tube is exposed from the end surface of the carbon brush, and the fixing spring is arranged on one side surface of the carbon tube and used for limiting the position of the carbon tube.

[0014] Further, one end of the fixing spring is fixedly connected with the carbon tube, and the other end of the fixing spring extends upward and limits the position of the carbon tube through elastic deformation.

[0015] The carbon brush and the brush holder applied to the small direct current motor have the advantages that the service life is prolonged by increasing the length of the carbon brush, the original bending brush holder is changed into a linear brush holder in order to increase the length in the original space, the carbon tube is used to carry the carbon brush, the spring is used to ensure the abutment between the carbon brush and the commutator, the convex plate is added to the brush holder, the spring and the carbon brush can be carried in the limited space, the abutting arc surface of the end surface of the carbon brush is used to increase the initial running-in contact surface between the carbon brush and the commutator, the generation of sparks is reduced, and the service life is further prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] ATTACHED Figure 1 It is a structure schematic view of the carbon brush of the utility model.

[0017] ATTACHED Figure 2 It is a front view of the brush holder of the utility model.

[0018] ATTACHED Figure 3 It is a structure schematic view of the brush holder of the utility model.

[0019] Wherein: 1. carbon brush, 2. brush holder, 3. carbon tube, 4. spring, 5. convex plate, 6. abutting arc surface, 7. fixing spring, the width of the carbon brush is a, and the length is b. DETAILED DESCRIPTION

[0020] In order to more clearly understand the technical scheme provided by the utility model, the utility model will be further described in combination with the drawings and specific embodiments.

[0021] As shown in the drawings, the utility model provides a kind of carbon brush and brush holder applied to small direct current motor, including carbon brush 1, brush holder 2, carbon tube 3 and spring 4;The carbon brush 1 is located in the carbon tube 3 inside, one end extends outward, and the commutator is in contact, one end is connected with the spring 4;The brush holder 2 is located in the carbon tube 3 side, and is fixedly connected with the carbon tube 3;The spring 4 is located between the brush holder 2 and carbon brush 1, and two ends are fixedly connected with the carbon brush 1 and brush holder 2 respectively;

[0022] Wherein the length b of the carbon brush 1 is two to three times of its width a.

[0023] Further, the brush holder 2 is "L" type appearance, and the center position is connected with the spring 4, and the two ends extending outward are provided with connecting holes for fixedly connecting the brush holder 2.

[0024] Further, the brush holder 2 is provided with a lug 5 on the side, which cooperates with the carbon tube 3, and is used to bear the spring 4.

[0025] Further, one end of the carbon brush 1 is provided with a contact arc surface 6, and the contact arc surface 6 is in contact with the commutator.

[0026] Further, the contact arc surface 6 is provided with a plurality of, and is evenly arranged on the surface of one end of the carbon brush 1.

[0027] Further, the arrangement direction of the contact arc surface 6 is in the width direction of the carbon brush 1.

[0028] Further, the carbon tube 3 wraps the spring 4 and carbon brush 1, one end exposes the end surface of the carbon brush 1, and is provided with a fixed spring piece 7, the fixed spring piece 7 is located on the side surface of the carbon tube 3, and is used to limit the position of the carbon tube 3.

[0029] Further, one end of the fixed spring piece 7 is fixedly connected with the carbon tube 3, and one end extends upward, and the position of the carbon tube 3 is limited by elastic deformation.

Claims

1. A carbon brush and brush holder for use in a small DC motor, characterized in that, It includes carbon brush, brush holder, carbon tube and spring; the carbon brush is located inside the carbon tube, one end extends outward and contacts with the commutator, one end is connected with the spring; the brush holder is located on one side of the carbon tube and is fixedly connected with the carbon tube; the spring is located between the brush holder and the carbon brush and is fixedly connected with the carbon brush and the brush holder at both ends. The length of the carbon brush is two to three times of its width.

2. A carbon brush and brush holder for use in a small DC motor according to claim 1, characterized in that, The brush holder is "L" shaped in appearance, the center is connected with the spring, and the two ends extending outward are provided with connecting holes for fixedly connecting the brush holder.

3. A carbon brush and brush holder for use in a small DC electric motor according to claim 2, characterised in that, The side of the brush holder is provided with a lug which cooperates with the carbon tube and is used for bearing the spring.

4. A carbon brush and brush holder for use in small DC electric machines according to claim 1, characterized in that, One end of the carbon brush is provided with a contact arc surface which contacts with the commutator.

5. A carbon brush and brush holder for use in a small DC electric motor according to claim 4, wherein The contact arc surface is provided with a plurality of arc surfaces which are uniformly arranged on the surface of one end of the carbon brush.

6. A carbon brush and brush holder for use in a small DC electric motor according to claim 5, wherein The arrangement direction of the contact arc surface is in the width direction of the carbon brush.

7. A carbon brush and brush holder for use in small DC electric machines according to claim 1, characterized in that, The carbon tube wraps the spring and the carbon brush, one end of which exposes the end surface of the carbon brush, and is provided with a fixed spring piece on the surface of one side of the carbon tube for limiting the position of the carbon tube.

8. A carbon brush and brush holder for use in a small DC electric motor according to claim 7, characterized in that, One end of the fixed spring piece is fixedly connected with the carbon tube, and the other end extends upward to limit the position of the carbon tube through elastic deformation.

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