Carbon brush for automobile window motor

Abstract

The utility model provides a carbon brush for an automobile window motor, which comprises a brush body and a lead fixed on the brush body, the brush body is in a columnar shape with a rhombic cross section, one end of the brush body is provided with an inwards sunken cambered surface, and an arc line in the circumferential direction of the cambered surface is parallel to a diagonal line of the rhombic cross section of the brush body. The design of the diamond structure of the brush body can reduce jumping of the carbon brush and suppress electromagnetic noise. In addition, the structure can reduce the generation of electric sparks of the motor, so that the contact friction between the carbon brush and the commutator is more stable, and the service life of the carbon brush is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of motor carbon brushes, in particular to a carbon brush for a car window motor. Background Art

[0002] As people's living standards continue to improve, cars are becoming more and more popular in every family in modern society, and people have higher and higher requirements for various parts of cars. The noise comfort of car window and sunroof parts has also become the focus of people's attention when buying a car. Such structural parts are generally powered by a 9-27V low-voltage DC brushed motor through rotation to achieve corresponding actions. The window noise is mostly generated by the friction between the internal carbon brush and the commutator when the motor is running.

[0003] At present, the brush bodies of carbon brushes used in this type of motors are mostly tiny rectangular blocks with carbon brush wires extending from the top surface. The structure is relatively simple. This type of carbon brush can basically meet the requirements of motor operation in the automotive industry. However, when the motor rotates at high speed, the carbon brush will jump, the contact stability between the carbon brush and the commutator will decrease, the current fluctuates greatly, and electromagnetic noise is easily generated, giving the driver a poor driving experience. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a carbon brush for an automobile window motor, comprising a brush body and a wire fixed to the brush body, the brush body being in the shape of a column with a rhombus-shaped cross section, one end of the brush body being provided with an inwardly concave arc surface, the arc line in the circumferential direction of the arc surface being parallel to the diagonal line of the rhombus-shaped cross section of the brush body.

[0005] Preferably, four edges of the brush body are contracted inwardly to form platforms, and the four platforms make the cross section of the brush body octagonal.

[0006] Preferably, the arc surface is provided with a plurality of convex edges arranged along the circumferential direction.

[0007] Preferably, both the top and the bottom of the arc surface are provided with inwardly recessed terraces.

[0008] The beneficial effects of the utility model are as follows: the diamond-shaped structure design of the brush body can reduce the vibration of the carbon brush and suppress electromagnetic noise; in addition, the structure can also reduce the generation of electric sparks in the motor, making the contact friction between the carbon brush and the commutator more stable, thereby extending the service life of the carbon brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the overall structure diagram of the utility model;

[0010] Figure 2 This is a structural diagram of the utility model from the top perspective;

[0011] Figure 3 This is a structural diagram of the utility model with a concave platform. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0013] See also Figure 1-Figure 3 The utility model provides a carbon brush for a car window motor, comprising a brush body 1 and a wire 2 fixed on the brush body 1, the brush body 1 is in a columnar shape with a rhombus cross section, one end of the brush body 1 is provided with an inwardly concave arc surface, and the arc line in the circumferential direction of the arc surface is parallel to the diagonal line of the rhombus cross section of the brush body 1.

[0014] The diamond-shaped structure design of the brush body 1 can reduce the vibration of the carbon brush and suppress electromagnetic noise; in addition, the structure can also reduce the generation of electric sparks in the motor, making the contact friction between the carbon brush and the commutator more stable, thereby extending the service life of the carbon brush.

[0015] Furthermore, four edges of the brush body 1 are contracted inwardly to form platforms 3, and the four platforms 3 make the cross section of the brush body 1 octagonal.

[0016] By setting the platform 3, the brush body 1 can be more easily formed when using a mold for production, and a safe distance can be ensured when the mold is closed to prevent mold collision; and during installation, the brush body 1 can be more easily matched with the installation hole, so that the brush body 1 can avoid burrs, bends and other defects on the installation hole.

[0017] Furthermore, the arc surface is provided with convex ridges 4 arranged along the circumferential direction.

[0018] The arrangement of the convex ridge 4 enables the arc surface to better position itself with the matching components on the motor when it cooperates with the matching components, making the operation process smoother and reducing the operating noise.

[0019] Furthermore, the top and the bottom of the arc surface are both provided with inwardly recessed platforms 5 .

[0020] By providing the concave platform 5, the contact area between the arc surface and the matching component is reduced, the matching error probability is reduced, the arc surface and the matching component are matched more accurately, the smoothness of operation is improved, and the noise is reduced.

[0021] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A carbon brush for a car window motor, comprising a brush body (1) and a wire (2) fixed to the brush body (1), characterized in that: The brush body (1) is in the shape of a column with a rhombus cross section. One end of the brush body (1) is provided with an inwardly concave arc surface, and the arc line in the circumferential direction of the arc surface is parallel to the diagonal line of the rhombus cross section of the brush body (1).

2. The carbon brush for automobile window motor according to claim 1, characterized in that: The four edges of the brush body (1) are contracted inwardly to form platforms (3), and the four platforms (3) make the cross section of the brush body (1) octagonal.

3. The carbon brush for automobile window motor according to claim 1, characterized in that: The arc surface is provided with a plurality of convex edges (4) arranged along the circumferential direction.

4. The carbon brush for automobile window motor according to claim 1, characterized in that: The top and bottom of the arc surface are both provided with inwardly recessed concave platforms (5).

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