JPS60131780A - 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.

Conventional sliding contact device: Pd 30-50% by weight, Ag
, 20 to 40% by weight; C, u, 20 to 40% by weight, and A g, -Cd 0.5 to 40% by weight.
It consists of a 15% by weight alloy material combined with a commutator or slip ring having a ζ configuration.

By the way, the brush of this sliding contact device is commitake or slip! J-songs tend to adhere when sliding, resulting in poor abrasion resistance, easy generation of abrasion particles, and unstable contact paper resistance. Yam,.

On the other hand, commitake or slip rings are Ag-, C
It was composed of an alloy material with a weight of 0.5 to 15% by weight, and had high adhesion when sliding with a brush, and poor wear resistance and purity. The present invention has been made in order to eliminate such drawbacks, and provides a sliding contact device that improves the abrasion resistance and contact resistance characteristics of the brush and improves the abrasion resistance of the commutator or slip ring. That is.
, 1 The sliding contact device of the present invention contains 30 to 50% by weight of Pd.

An alloy material made by adding a total of 0.5 to 10 weight % of Si and Zr to an alloy material of 20 to 40 weight % of A g, , C,, 740 weight % of μ2G without changing the composition ratio. The configured brush □ and Ag-=Cu3-12% by weight
The support is combined with a commutator or slip ring made of an alloy material containing 3 to 12% by weight of Ag-Cu and 5% by weight or less of Cd.

Note that Si is added to the alloy material constituting the brush.

A part of Z' may be replaced with an Fe group element (Fe, Co, Ni) in a range of 0.01 to 0.5% by weight.

In the sliding contact device of the present invention, the brush is Pd'30~
50% by weight, Ag2O ~ 40% by weight, Cu2O ~ 40% by weight alloy material, without changing the composition ratio, add St and Zr in a total of 0.5 ~ 10% by weight to create an alloy material consisting of "ζ" The reason for this structure is to increase adhesion resistance in order to improve the wear resistance of the Pd-Ag-Cu alloy material.
If it is less than 5% by weight, the effect cannot be exhibited, and if it exceeds 10% by weight, the amount of oxides generated increases, the contact resistance becomes high, and it becomes unstable.

Commutator or slip ring, Ag-Cu3~1
2-fold view% or Ag-Cu3-12wt%-Cd5wt%
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 will be reduced. If it exceeds 12% 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, 3i added to the alloy material constituting the brush,
A portion of Zr is in the range of 0.01 to 0.5% by weight.

When substituted with F6 group elements (Fe, Co, 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 grain refinement is not effective. Therefore, even if it exceeds 0.5% by weight, no further effect can be obtained.

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

Brush wire rods with a wire diameter of 0.7+U made of alloy materials of the examples and conventional examples with the compositions shown in the left column of Table 1 below were each cut into lengths of 8 mm, and two wires were placed in parallel with one end having a width of 10 mm. ,
A brush was made by welding it to a composite material with a length of 13 mm and a thickness of 0.2 um, and a 2R arc-shaped contact part was bent at the other end. On the other hand, a slip ring with a diameter of 50 m5 was made by punching out a 0.5 mm thick plate made of alloy materials having the compositions shown in the right column of Table 1 below. Therefore, by combining these brushes and slip rings, a Pa moving contact device is made, and each brush is brought into contact with the slip ring,
A sliding test was conducted under the following test conditions by rotating the slip ring forward and backward, and the wear amount and contact resistance of the brush and slip ring were measured, and the results shown in Table 2 below were obtained.

Test conditions Current: 0.6A Voltage: 12v Load: Resistance load Rotation speed: 1000rpm Circumferential speed: 120-130m/min Contact crab 10
0g Sliding time = 7h (blank space below) Table 2 As is clear from Table 2 of -1-, the brushes and slip rings of the sliding contact devices of Examples 1 to 3 are the same as those of the conventional example 1.
It can be seen that the amount of wear is significantly less than that of the brush and slip ring of the sliding contact in . This is simply because the addition of Si and Zr to the alloy material constituting the brushes of the sliding contact devices of Examples 1 to 3 prevents adhesion during sliding and improves wear resistance. . In particular, the reason why the brush of the sliding contact device of Example 3 has less wear compared to the brush of the sliding contact device of other examples is that Fe group elements are added to the material constituting the brush, and the crystals of This is because the particles are finely dispersed, which improves wear resistance. Also, Example 1~
This is because the alloy material Cu that constitutes the slip ring of the sliding contact device No. 3 suppresses the increase in stickiness 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) Pd 30-50% by weight, Ag2O-40% by weight, C
A brush made of an alloy material containing 0.5 to 10% by weight of Si and Zr in total without changing the composition ratio to an alloy material containing 40% by weight of U2O, and
A sliding contact device combined with a commutator or slip ring made of an alloy material of 12% by weight or less than 3 to 12% by weight of Ag-Cu and 5% by weight. 2) Si added to the alloy material constituting the brush. Zr(7) partially contains Fe in a range of 0.01 to 0.5% by weight
2. The sliding contact device according to claim 1, wherein the sliding contact device is substituted with a group element.