JPH0785937A - Slider brush - Google Patents

Abstract

PURPOSE:To stabilize the contacting performance of a brush for sliding motions and nullify the condition of non-current feeding for enhanced reliability by structuring the brush so that the length of brushes is varied one by one through provision of steps from slit to slit between brushes, eliminating risk of resonance of the brushes at the time of rotation vibration, and preventing the brushes from separating simultaneously from the rotor as mating party. CONSTITUTION:A contact material 6 0.08mm thick consisting of 10%Au, 10%Pt, 35%Pd, 30%Ag, 14%Cu, and 1%Zn is inlay jointed with one end of a plate member 5 for example 0.08mm thick and 18mm wide consisting of CuNiSn. This clad material jointed is subjected to a press process to form slits 8, and a combteeth form brush 10 for sliding motions is accomplished which has three brushes 9, wherein the slits 8 between the brushes are equipped with steps bit by so that the length of brushes 9 varies one by one. This gives different resonant frequencies to the brushes 9. Accordingly the brushes 9 are free from resonances even though the brush 10 makes rotational vibration during service and are not separated simultaneously from the rotor as mating party, so that contacting takes place in good performance and there is no risk of generating non-current feed state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding brush used in motors, encoders and the like.

[0002]

2. Description of the Related Art A conventional sliding brush for the above-mentioned use is shown in FIG.
As shown in (1), the plate material is a comb-teeth-shaped product, and the slits 2 between the brushes 1 have the same length, and therefore the brushes 1 have the same length. By the way, since the sliding brush 3 having such a structure has the same length as the brush 1,
At the same time, it may be separated from the rotating body of the other party by the rotational vibration, and may be in a non-energized state.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention is to provide a sliding brush in which each brush does not resonate during rotational vibration and does not separate from the other rotating body at the same time.

[0004]

A sliding brush according to the present invention for solving the above-mentioned problems is a comb-shaped sliding brush that has been press-pressed, in which slits between brushes are sequentially provided with steps. The feature is that the length of the brush is sequentially changed.

[0005]

As described above, in the sliding brush according to the present invention, the slits between the brushes are sequentially provided with steps, and the lengths of the brushes are sequentially changed. Therefore, the resonance frequencies of the brushes are different. Therefore, during rotational vibration during use, the brushes do not resonate and do not separate from the other rotating body at the same time, so the contact is stable and there is no non-energized state.

[0006]

EXAMPLE An example of the sliding brush of the present invention will be described with reference to the drawing. As shown in FIG. % -Pt 10% -Pd 35% -Ag 30% -Cu 14%-
The clad material 7 to which the contact material 6 made of Zn 1% was inlaid was made by punching out the slits 8 as shown in FIG. The slits 8 in between are provided with steps in order, and the length of the brush 9 is sequentially changed. Incidentally, each of the brushes 9 of this embodiment has a width of 0.3 mm and a length of 2.0 mm,
It is 2.5mm and 3.0mm. The slits 8 each have a width of 0.25 mm.

The above embodiment is a sliding brush brush 10 made of the clad material 7. This sliding brush 10 is used by welding the base end portion to the terminal 11 as shown in FIG.
Au 62.5% -Ag 29% -having spring characteristics as shown in
When a solid material 12 made of Cu 8.5% is punched out as shown in FIG. 5 to make a sliding brush 10 'having the same dimensions as in the above embodiment, the tip portion is bent at a right angle to form the contact portion 13. It is formed, and the base end is directly attached to the component without using the terminal 11 for use.

As described above, the sliding brush 10 of each embodiment,
10 'sequentially provides steps in the slit 8 between the brushes 9,
Since the lengths of the brushes 9 are sequentially changed, the resonance frequencies of the brushes 9 are different. Therefore, the sliding brushes 10 and 10 ′ do not resonate with each other even if they rotate and vibrate during use, and do not separate from the mating rotor at the same time.
The contact is stable and there is no non-energized state.

[0009]

As described above, according to the sliding brush of the present invention, each brush does not resonate during rotation vibration during use, does not separate from the other rotating body at the same time, has stable contact, and is in a non-energized state. Reliability is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a clad material which is a material of an embodiment of a sliding brush of the present invention.

FIG. 2 is a plan view showing an example of a sliding brush of the present invention obtained by press-pressing the clad material of FIG.

FIG. 3 is a view showing a state in which the base end portion of the sliding brush of FIG. 2 is welded to a terminal when in use.

FIG. 4 is a view showing a solid material which is a material of another embodiment of the sliding brush of the present invention.

5 is a perspective view of another embodiment of the sliding brush of the present invention in which the solid material of FIG. 4 is punched out and the tip portion is bent at a right angle to form a contact portion.

FIG. 6 is a plan view showing a conventional sliding brush.

[Explanation of symbols]

 8 Slit 9 Brush 10 Sliding brush 10 'Sliding brush

Claims (1)

[Claims] 1. A sliding brush having a comb-teeth shape that has been press-pressed, characterized in that slits between the brushes are sequentially provided with steps so that the lengths of the brushes are sequentially changed.