JPS5853218Y2 - Composite contact wire - Google Patents

Description

[Detailed description of the invention] This invention is a composite contact wire, especially the main body is aluminum,
This invention relates to composite contact wires such as those whose sliding surfaces are made of stainless steel.

It has been experimentally confirmed that stainless steel has better wear resistance than copper trolleys.

This is due to the high hardness of stainless steel.

On the other hand, it is inferior to copper trolleys in terms of current collection characteristics, especially wire loss rate.

The reason for this is that stainless steel has a high hardness (even if it is soft, it has a Vickers hardness of 200), so when it slides with the current collector sliding plate,
This is because there is less wear and it is difficult to get acquainted.

On the other hand, a copper trolley is softer than stainless steel (even a hard material has a Pinkers hardness of 140), and the trolley itself is easily worn out by sliding on the sliding plate.

Therefore, it is necessary to improve the line separation characteristics of the stainless steel that forms the sliding surface.

The purpose of the present invention is to eliminate the drawbacks of the prior art described above and to provide a novel composite contact wire whose sliding surface is mainly a hard metal surface and has good wire release characteristics.

That is, the gist of the present invention is to provide a composite contact wire characterized in that the current collector sliding surface is made of stainless steel, and a thin metal layer having a conformability characteristic is integrally formed on the surface of the stainless steel. It's on the contact line.

The attached drawings show a cross section of the aluminum-stainless steel composite contact wire according to the present invention, and 1 is an aluminum metal body forming the main body of the contact wire, and 2 is the aluminum metal body 1.
3 shows a stainless steel plate layer integrally attached to the sliding contact side of the current collector, and 3 indicates a thin copper metal layer integrally attached to the surface of the stainless steel plate layer according to the present invention.

As a method for depositing the copper metal thin layer 3 on the stainless steel surface, a thin film layer can be easily formed by thermal spraying of steel or the like.

In addition to this, there is a method in which copper and stainless steel are pre-integrated into a composite material, and the desired object is obtained by press-welding it with an aluminum metal body.

Note that the copper metal thin layer used on the surface of the stainless steel may be pure copper or an alloy with good wear resistance such as a copper-tin alloy.
It is preferable to select a metal that has conformability properties and has soft properties similar to those of the above-mentioned steel, without being limited to an alloy that has particularly good wear resistance.

Since the contact wire of the present invention is constructed as described above, the copper layer is easily worn away due to the sliding of the current collector, and even if it comes into contact with stainless steel after that, the disconnection characteristics are the same as those of the copper layer. It was confirmed that the situation was the same as when they were in contact with each other.

The reasons for this are as follows.

That is, the copper trolley is made of a material that is compatible with the material, and as it slides, it gradually wears out and eventually a portion of the stainless steel surface is exposed.

Furthermore, as sliding continues, the exposed area of the stainless steel surface gradually increases, and eventually the entire surface becomes stainless steel.

However, the rate at which the exposed area of stainless steel increases is slow because it is a thin layer, and the area of stainless steel increases as it gradually adapts.

For this reason, even when the sliding surface is made entirely of stainless steel, it conforms well in shape and has good release characteristics.

In this way, it is possible to prevent the deterioration of wire separation characteristics that tends to occur in contact wires with good wear resistance characteristics, which is of great practical value.

[Brief explanation of the drawing]

The accompanying drawing shows a cross-sectional view of the composite contact wire of the present invention. 1 aluminum metal body, 2 stainless steel plate layer, 3:
Copper metal thin layer.

Claims (1)

[Scope of utility model registration request] 1. 1. A composite contact wire whose current collector sliding surface is made of stainless steel, characterized in that a thin metal layer having conformability characteristics is integrally formed on the surface of the stainless steel. 2. The composite contact wire according to claim 1, wherein the thin metal layer is made of copper or a copper alloy.