JPS60131779A - Slide contact unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sliding contact device, and in particular to a brush and a commutator or slip ring that constitute the sliding contact device.

Concerning the improvement of materials.

Conventional Φ sliding contact device body, Pd, 30-50% by weight, Ag
A brush made of an alloy material containing 2O to 40% by weight, Cu, and 20 to 40% by weight, h,, A g-, C, d 0
．． It is made by combining a commutator, a mata number, and a slip ring, which are made of an alloy material of 5 to 15% by weight and weight.

It's also 9.

By the way, the brush of this sliding contact bag device has poor abrasion resistance when sliding with commi-chie, pickpockets, and tubing, and is easily abraded and generates powder, resulting in unstable contact resistance. 1. .

J, Commutator or pre-rip ring is Ag-Cd0
．． It was composed of 5 to 15% by weight of an alloy paste material, and had high stickiness and poor abrasion resistance when sliding on a brush.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and provides a sliding material that improves the wear resistance and contact resistance characteristics of brushes and improves the wear resistance of commutators or slip rings. It is our pleasure to provide a moving contact device.

The sliding contact device of the present invention contains 30 to 50% by weight of Pd.

Sb, Te, Mo+ are added to the alloy material containing ~40% by weight of Ag2O and ~40% by weight of Cu2O without changing the composition ratio.
0.5 to 1 of at least one of Pb, Se, As, and Zn
A brush made of an alloy material containing 0% by weight;
It is combined with a commutator or a slip ring made of an alloy material containing 3-12% by weight of Ag-Cu or 3-12% by weight of Ag-Cu-5% by weight of Cd.

Incidentally, sb is added to the alloy material constituting the brush.

Some of Te, Mo, Pb, Se, As, Zn, 0.0
Fe group elements (Fe, Co
.

Ni) may be substituted.

In the sliding contact device of the present invention, the brush has Pd30 to 5
0% by weight, Ag2O~40% by weight, Cu 20~40
% by weight of the alloy material without changing its composition ratio.
, To, Mp, Pb, Se, As, and Z'n in an amount of 0.5 to 10% by weight. This is to generate an appropriate amount of oxide that becomes a lubricant to improve resistance characteristics and wear resistance.If it is less than 0.5% by weight, the amount of oxide generated is too small to be effective as a lubricant.
If it exceeds 0% by weight, the amount of oxide formed increases, the contact resistance becomes high, and furthermore, it becomes unstable.

Commutator or slip ring, Ag-Cu3~1
2% by weight or 3-12% by weight of Ag-Cu-5% by weight of Cd
The reason why it is made of the following alloy material is to suppress the adhesion during sliding with the brush and improve wear resistance.If the Cu content is less than 3% by weight, this effect cannot be obtained. If it exceeds 5% by weight, the amount of oxide generated during sliding will be too large, resulting in high contact resistance and instability.
If the amount exceeds % by weight, when it becomes oxidized Cd, the contact resistance becomes high and the wear resistance deteriorates. Therefore,
The content of Cu is 3 to 12% by weight, and the content of Cd is not more than 5% by weight.

Therefore, S added to the alloy material constituting the brush
b, “l”e, Mo, Pb, Ss, As,
When part of Zn is replaced with Fe group elements (Fe, Co, Ni) in the range of 0.01 to 0.5% by weight, the crystal grains can be made finer and the wear resistance can be further improved. If the amount is less than 0.01% by weight, no grain refining effect will be achieved, and if it exceeds 0.5% by weight, it will be a hindrance to the oxide that acts as a lubricant.

Next, specific embodiments and conventional examples of sliding contact devices based on fusaku will be described.

Brush wire rods with a wire diameter of 0.7N made of alloy materials of the example and conventional example shown in the left column of Table 1 below are each cut into lengths of 8 fins, and two fins are placed in parallel, with one end having a width of 10 fins. A brush was made by welding it to a composite material of Kasumi, length 13 mm, thickness 0.2 Tsuru, and bending a 2R arc-shaped contact part at the other end. On the other hand, a plate material having a thickness of 0.5 fins made of alloy materials of the embodiments and conventional examples having the compositions shown in the right column of Table 1 below is punched out to a diameter of 50 mm.
■I made a slip ring. Therefore, a sliding contact device was made by combining these brushes and slit ring, each brush was brought into contact with the slip ring, and the slip ring was rotated in forward and reverse directions to perform a sliding test under the following test conditions.
When the wear amount and contact resistance of the brush and slip ring were measured, the results shown in Table 2 below were obtained.

Test conditions Current: 0.6A Voltage: 12V Load: Resistance load ゛Rotation speed = 100Orpm Circumferential speed: 120~130m/min Contact crab 10
0g Sliding time j 7h (blank space below) Table 2 As is clear from Table 2 above, the brushes and slip rings of the sliding contact devices of Examples 1 to 8 are the same as those of conventional examples 1 and 2, respectively. It can be seen that the amount of wear is significantly lower than that of brushes and slip rings, and the contact resistance is lower and more stable. This is simply due to the fact that the alloy materials constituting the brushes of the sliding contact devices of Examples 1 to 8 are Sb, Te, M
o, Pb.

Oxides such as Se, As, Zn, and even Ni are generated, and these oxides act as lubricants, improving wear resistance, and because the oxides are soft, they are easily removed by sliding action.
This is because the contact surface of the brush is always clean and the contact resistance is further reduced. In particular, the brush of the sliding contact device of Example 8 wears more than the brush of the sliding contact device of other examples. The reason why there is less F is in the materials that make up the brush.
This is because the e-group element is added and its crystal grains are finely dispersed, improving wear resistance. This is because the alloy material Cu prevents the adhesive from increasing during sliding and improves wear resistance.

As detailed above, the sliding contact device of the present invention has significantly superior wear resistance of the brush and commutator or slip ring compared to conventional sliding contact devices, generates extremely little wear powder, and has contact resistance. It is also much lower and more stable, so it can be said to be an epoch-making device that can replace conventional sliding contact devices.

Applicant Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] 1) I) d 30-50% by weight, Ag2O-40
Sb, i'e1Mo', Pb, Se are added to the alloy material containing % by weight, Cu2O to 40M% without changing the composition ratio.
, As. A brush made of an alloy material containing 0.5 to 10% by weight of at least one type of Zn;
A sliding contact device comprising a commutator or a slip ring made of an alloy material of 3 to 12% by weight of Ag-Cu and 5% by weight of Cd or less. 2) sb added to the alloy material constituting the brush. Some of Te, Mo, Pb, Se, As, and Zn are 0.01
2. The sliding contact device according to claim 1, wherein the Fe group element is substituted in a range of 0.5% by weight.