JPS6093787A - 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 particularly to improvements in the materials of the brush and commutator or slip ring that constitute the same.

The conventional sliding contact device has an Au of 60.5 to 64.5% by weight.

A brush made of an alloy material containing 5.5 to 9.5% by weight of Ag and 2B to 32% by weight of Cu, and A g -Cd.
It is composed of a commutator or a slip ring made of an alloy material containing 5 to 15% by weight of O.

By the way, since the brush of this sliding contact device is made of the above-mentioned alloy material, it has poor abrasion resistance when sliding with a commutator or slip ring, easily generates abrasion powder, and has poor contact resistance. It was stable.

On the other hand, the commutator or slip ring is Ag-Cd
It was composed of an alloy material of 0.5 to 15% by weight, and had high adhesiveness and poor abrasion resistance when sliding with a brush.

The present invention has been made in order to eliminate such drawbacks, and aims to provide a sliding contact device in which the wear resistance and contact resistance characteristics of the brush are improved, and the wear resistance of the commitake or slip ring is improved. It's a cheat.

The sliding contact device of the present invention has an A u of 60.5 to 64.5
Weight%, Ag5.5-9.5% by weight, Cl328-32
3b by weight of the alloy material without changing its composition ratio.
.

i''e, M o, P b, S e, A
A brush composed of an alloy H material containing 0.5 to 10% by weight of at least one of It is constructed by combining a commutator or a pickpocket ring made of an alloy material.

In addition, sb is added to the alloy monthly rate that constitutes the brush.

Part of Te, Mo, Pb, Se, As, o, oi~0
．． l in the range of 5% by weight? Group 6 elements (F (1, Co,
N , i ) may be substituted.

In a part of the sliding contact device of the present invention, the brush is made of Au60.
5-64.5% by weight, A g 5.5-9.5 fl
Sb, Te, Mo, Pb, Se, A without changing the composition ratio to the alloy material containing 28 to 32 weight % of Cu.
The reason why it is made of an alloy material containing 065 to 10% by weight of at least one of the following is ljl liL! A u
-A This is to generate an appropriate amount of oxide that becomes a lubricant in order to improve the contact resistance characteristics and wear resistance of the g-Cu alloy material. If it is less than 0.5% by weight, the amount of oxide generated is small and it becomes a lubricant. If the amount exceeds 10% by weight, the amount of oxides generated increases, 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 stickiness when sliding with the brush and improve wear resistance.If the Cu content is less than 3% by weight, this effect cannot be obtained. , 12m
If it exceeds 1%, the amount of oxide generated during sliding will be large (too much, resulting in high contact resistance and instability, and if the Cd content is 5%).
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, Sb added to the alloy material constituting the brush,
Some of Te, Mo, Pb, S, e, As, from 0.01 to
Fe group element within 0.5% by weight! 3 (Fe, Co.

When substituted with Ni), the crystal grains can be made finer and the wear resistance can be further improved.If it is less than 0.01% by weight, the effect of making the grains finer appears.
If it exceeds this amount, it becomes a hindrance to the oxide that acts as a lubricant.

Next, a specific example and a conventional example of the sliding contact device according to the present invention will be described.

The #M diameter 0.7mm brush wires made of alloy materials of Examples 1 to 11 and the conventional example having the composition shown in the left column of Table 1 below were each cut into 8 length pieces, and two wires were cut in parallel. Then, one end was welded to a composite material having a width of 1 (1++a, length 13u+, thickness 0.-), and a 2R arc-shaped contact portion was curved at the other end to make a lash. On the other hand, I"t made of the alloy materials of the embodiments and conventional examples having the composition shown in the right side of Table 1 below.
Punch out a 0.5 inch plate and make a 50 mm diameter snout.
I made J. Of course these brushes and pickpocket knobs.

A sliding contact device is made by combining the rings, each brush is brought into contact with the slip ring, and a tie test is performed under the following test conditions by rotating the screw 17 and the knob IJ in the forward and reverse directions to determine the wear of the brushes and slip ring. When the amount and contact resistance were measured, the results shown in Table 2 below were obtained.

Test conditions Current: 0.6A Voltage: 12V Load: Resistance load Rotation speed: 1000rpm Circumferential speed: 130-120m/min Contact pressure
: 100g Contact time = 7H (blank space below) Table 2 As is clear from Table 2 above, the brushes and slip rings of Examples 1 to 80) tg moving contact device were those of Conventional Example 1,
It can be seen that the amount of wear is significantly lower than that of the brush and slip ring of the sliding contact in No. 2, and the contact resistance is much lower and more stable. This is simply due to the fact that the alloy material constituting the brush of the sliding contact devices of Examples 1 to 8 is Sb, T, etc. during sliding.
Oxides such as e, Mo, Pb3e, As, and even Nr are generated, and these oxides act as lubricants, improving wear resistance.
In addition, since the oxide is soft, it is easily removed by the sliding action, so the contact surface of the brush is always clean and the contact resistance is further reduced. In particular, the fact that the brush of the sliding contact device of Example 7.8 has even less wear compared to the brush of the sliding contact device of other examples is because the material making the flange contains Fe group elements. added,
This is because the crystal grains are finely dispersed and the wear resistance is unparalleled. In addition, 1 of Examples 1 to 8
This is remarkable because the Cu alloy material that constitutes the slip ring of the 11j moving contact device suppresses the increase in stickiness during sliding and improves the 14ff abrasion resistance.

As detailed above, the 71 moving 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 the conventional TG moving contact device.

Applicant: Tanaka Metal Metal Industry Co., Ltd.

Claims (1)

[Claims] 1) A u 60.5-64.5% by weight, 8g 5
．． Sb, Te, Mo, P are added to the alloy material containing 5 to 9.5% by weight and Cu2B to 32% by weight without changing the composition ratio.
b, Se. A brush made of an alloy material containing 0.5 to 10% by weight of at least one type of As, and Ag Cu3 to 12
A sliding contact device which is combined with a commutator or a slip ring made of an alloy material having a weight percent of 3 to 12 percent by weight of Ag-Cu and 5 percent by weight of Cd or less. 2) Sb added to the alloy material constituting the brush. Te, Mo, Pb, Se, some of the 8S are 0.01 to 0
．． The sliding contact device according to claim 1, characterized in that the p-6 group element is substituted in a range of 5% by weight.