JPS60138862A - 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 devices have P d of 87-93% by weight, R
A brush made of an alloy material containing u7 to 13% by weight;
g-CdO, in combination with a commutator or slip link made of an alloy material containing 5 to 15% by weight.

By the way, the brush of this sliding contact device has poor abrasion resistance when sliding with a commutator or slip ring, tends to generate abrasion powder, and has unstable contact resistance.

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 provides 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. That is.

The sliding contact device of the present invention has a Pd of 87 to 93% by weight.

At least one of B, Si, Ge, and TI is added to an alloy material containing 7 to 13% by weight of Ru without changing the composition ratio.
A brush made of an alloy material containing 5 to 10% by weight of Ag-Cu and 3 to 12% by weight of Ag-Cu or 3 to 1% by weight of Ag-Cu.
It is combined with a commutator or sling ring made of an alloy material containing 2% by weight-5% by weight of Cd or less.

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

Part of Si, Ge, and TI may be replaced with Fe group elements (Fe, Go, Ni) in a range of 0.01 to 0.5% by weight.

In the sliding contact device of the present invention, the brush I) d87
An alloy material made by adding 0.5 to 10 weight % of at least one of B, Si, Ge, and TI to an alloy material of ~93 weight % and Ru 7 to 13 weight % without changing the composition ratio. The reason for the configuration is the above-mentioned P d -1? This is to generate an appropriate amount of oxide that becomes a lubricant in order to improve the wear resistance of the alloy material of u.If it is less than 0.5% by weight, the amount of oxide generated is small and cannot be effective as a lubricant. If the weight exceeds 10 weight, the amount of oxides generated will increase, contact resistance will increase, and furthermore, it will become 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. If the Cd content 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.

However, B and S added to the alloy material constituting the brush
Part of i, Ge, TI, o, ot ~ o, sw amount%
When substituted with Fe group elements (Fe, Co, Ni) in the range of If no effect is exhibited and the amount exceeds 0.5% of heavy chains, the oxide that acts as a lubricant will become a nuisance.

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

Brush wire rods of wire diameter O9- made of alloy materials of the example and conventional example shown in the left column of Table 1 below are each cut to a length of 8 mm, arranged in a row of two wires, and one end is cut into a width of 1 (bn). A brush was made by welding a composite material with a length of 13+am and a thickness of 0.2mm, and a 2R arc-shaped contact part was bent at the other end.Meanwhile, the component composition shown in the right column of Table 1 below A slip ring with a diameter of 50mm was made by punching out a 0.51mm thick plate made of the alloy material of the embodiment and the conventional example.Sliding contact devices were made by combining these brushes and sliprings, respectively. The brush was brought into contact with the slip ring, the slip ring was rotated forward and backward, and a sliding test was conducted under the following test conditions, and the wear amount and contact resistance of the brush and slip ring were measured, as shown in Table 2 below. I got similar results.

Test conditions Current: 0.6A Voltage: 12v Load: Resistance load Rotation speed: 1000rpm Circumferential speed: 120-130m/rn in contact crab 100g Sliding time Near h (blank below) Table 2 Above As is clear from Table 2, the brushes and slip rings of the sliding contact devices of Examples 1 to 5 have significantly less wear than the brushes and slip rings of the sliding contact devices of Conventional Examples 1 and 2, respectively. It can be seen that the resistance is low and stable. This is simply due to the fact that the alloy material constituting the brush of the sliding contact devices of Examples 1 to 5 is
In addition, oxides such as Ni are generated, and these oxides act as lubricants, improving wear resistance.Also, since the oxides are soft, they are easily removed by sliding action, so the brush contact surface This is because the brushes of the sliding contact device of Example 5 are always clean and the contact resistance is low.In particular, the amount of wear on the brushes of the sliding contact device of Example 5 is even less than that of the sliding contact devices of other examples. This is because Fe group elements are added to the material constituting the material, and its crystal grains are finely dispersed, further improving the wear resistance.Also, Example 1
This is because the Cu alloy material constituting the slip ring of the sliding contact device No. 5 to 5 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 contator or slip ring compared to conventional sliding contact devices, generates extremely little wear powder, and Since the contact resistance is also low and stable, it can be said to be an epoch-making device that can replace conventional sliding contact devices.

Claims (1)

[Claims] 1) B and Si are added to an alloy material containing P d 87 to 93% by weight and Ru 7 to 13% by weight without changing the composition ratio.
. A brush made of an alloy material containing 0.5 to 10% by weight of at least one of Ge and TI, and Ag-Cu3
~12 wt.% or Ag-Cu3-12 wt.%-Cd5
A sliding contact device consisting of a commutator or slip link made of an alloy material of less than % by weight. 2) B added to the alloy material that makes up the brush. Part of Si, Ge, TI (7) is 0.01 to 0.5% by weight
The sliding contact device according to claim 1, characterized in that the Fe group element is substituted within the range of .