JPS60138881A - 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 link constituting the sliding contact device.

The conventional sliding contact device has a P d of 30 to 70% by weight, Δ
A brush made of an alloy material of 30 to 70% by weight;
A g-C d O. It is combined with a commutator or a slip ring made of 5 to 15% by weight alloy iron.

By the way, the brushes of this sliding contact device adhere to each other when sliding with the commutator or slip link, resulting in poor wear resistance and easy generation of abrasion powder, which causes noise generation.

On the other hand, the commutator or slip link is
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 of the brush is improved and the wear resistance of the commutator or slip link is improved. It is.

The sliding contact device of the present invention has Pd of 30 to 70% by market weight.

A g 30-70% by weight alloy JrA material, without changing the composition ratio, Si and Zr in total 0.5-IOf
A brush made of an alloy material containing fl [%];
AI! -Cu 3-12 city minimum father is Δg-CI” 3-1
It consists of a combination of a commutator or a slip ring made of an alloy material containing 5% by weight or less of double phosphor-Cd.

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

A part of Zr is Fe in a range of 0.01 to 0.5%
Substitution with group elements (li''e, CO, Nl) -( is also good.

In the sliding contact device of the present invention, the flange is I) d30
~70 wt%, Ag30~70 wt% alloy material, Si and Zr in total (), 5 without changing the composition ratio
The reason why the alloy material is made of an alloy material with ~10% addition is to suppress softening during sliding and prevent adhesion in order to improve the wear resistance of the d-A g alloy material mentioned above. for 0.5
If it is less than 10% by weight, the full effect cannot be exhibited, and if it exceeds 10% by weight, the amount of oxides generated increases, contact resistance becomes high, and it becomes unstable.

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

Therefore, St added to the alloy material constituting the flange,
A part of Zr is added in the range 1 to 0.01 to 0.5 m'lti%.
In the case of substituting with ISe group elements (Fe, Co, Ni), the crystal grains can be made finer and the wear resistance can be further improved. The effect of miniaturization does not appear, and even if the amount exceeds 0.5%, no further effect can be obtained (j4).

Next, we will discuss the specific capabilities of the sliding contact device according to the present invention! ! An example and a conventional example will be explained.

Brush wires 4A each having a wire diameter of 0.7 fins made of alloy materials of the embodiment and conventional example shown in the left column of Table 1 below were cut into lengths of 8 lengths, and two wires were placed in parallel and one end was cut. width 10 dragon 5
A brush with a length of 13 mm and a thickness was made by welding it to the base H of 1 and 2 fins and bending a 217 arc-shaped contact part at the other end.

On the other hand, slip rings with a diameter of 5 mm and 111 mm were punched out from a temporary phase having a thickness of 0.5 mm and made of alloy materials having the compositions of Examples and Conventional Examples not shown in the right column of Table 1 below. Therefore, a sliding contact device was made by combining these brushes and slip rings, and the brush was brought into contact with the slip ring, and the slip ring was rotated in forward and reverse directions under the following test conditions.
A ζIN dynamic test was conducted to measure the wear (1) and contact resistance of the furan and slip ring, and the results shown in Table 2 below were obtained.

Test conditions Current: 0.6A Voltage: 12■ Load: 1 resistive material Number of revolutions: 10 (lor pm) Circumferential speed: 120-130m/rn in contact crab 100g Sliding time Near h (margins below) Table 2 As is clear from Table 2 above, the flange and slip link of the sliding contact devices of Examples 1 to 3 have a greater amount of wear than the brush and slip ring of the sliding contact of Conventional Examples 1 and 2, respectively. It can be seen that the contact resistance is significantly lower and the contact resistance is the same.This is because the alloy monthly rate constituting the brushes of the sliding contact devices of Examples 1 to 3 is changed to liJ dynamic contact by the addition of Si and lr. This is because the adhesion resistance is improved by suppressing the oxides, and the amount of oxide generated during sliding is balanced with the amount of wear.Especially, the flange of the sliding contact device of Example 3 The reason why the amount of wear is much smaller than that of the flange of the sliding contact device of other embodiments is that the material constituting the brush is doped with elements of the 1-e group, and its crystal grains are divided into 11 particles. I&L
This is because the wear resistance is even higher than 1iil-1. Moreover, the alloy monthly rate of Cu constituting the slip ring of the sliding contact devices of Examples 1 to 3 is 1
11, the withering resistance is suppressed from increasing (this is due to improved abrasion resistance).

As mentioned above, the sliding contact device of the present invention is significantly superior to the conventional sliding contact device in terms of abrasion resistance of Bebraso, commutator, or slip link.
(, IY wear 1'5), the opening fl is extremely small, almost no noise is generated, and it can be said to be an epoch-making device that can replace conventional sliding contact devices.

Applicant [1 Chuukikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] 1) A total of 0.5 to 10% by weight of Si and Zr is added to an alloy material containing 30-70% Pd and 30-70% Ag without changing the composition ratio. A brush made of an alloy material made of 3 to 12% by weight of Ag-Cu or Ag-
A sliding contact device 9'' consisting of a commutator or a slip link made of an alloy material of 3 to 12 weight % Cu and 5 weight % Cd or less. 2) Si added to the alloy material constituting the brush. 7 , Fe in the range of 0.01 to 0.5% by weight as a part of r
The sliding contact device according to claim 1, characterized in that -ζ is substituted with a group element.