JPS60138861A - 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, and p
, g-CdO, in combination with a commutator or slip ring made of an alloy material of 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 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 commutator or slip ring is improved. That is.

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

Sb, 're, Mo, Pb, Se, and As are 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 0.5 to IO weight percent of at least one of Zn, and Ag-Cu3 to 12
It 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 of Cd.

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

'I''e, Mo, Pb, Se, As, some of Zn, 0
．． Fe group elements (Fe, C
o.

Ni) may be substituted.

In the IN moving contact device of the present invention, the brush is Pd87~
Sb, "l"e, and Mo are added to an alloy material containing 93% by weight of Ru and 7 to 13% by weight of Ru without changing the composition ratio.

0.5 to 1 of at least one of Pb, Se, As, and Zn
The reason for using an alloy material containing 0% by weight is to generate an appropriate amount of oxide that acts as a lubricant to improve the wear resistance of the PdRu alloy material. If the amount of oxides generated is small, it cannot be effective as a lubricant, 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 A g -Cu 3-12% by weight - Cd5
The reason why it is made of alloy material of less than % by weight is to suppress stickiness when sliding with the brush and improve wear resistance.
If the u content is less than 3% by weight, the effect cannot be obtained, and 1
If the Cd content exceeds 2% by weight, the amount of oxide generated during sliding will be too large, resulting in high contact resistance and instability.If the Cd content exceeds 5% by weight, when this becomes oxidized CCt, the contact resistance will increase. becomes high, and wear resistance deteriorates. Therefore, the Cu content should not exceed 3 to 12% by weight, and the Cd content should not exceed 5% by weight.

Therefore, Sb added to the alloy material constituting the brush,
Some of Te, Mo, Pb, Se, As, Zn, 0.0
Fe group elements (Fe, Co,
When replaced with Ni), the crystal grains can be made finer and the wear resistance can be further improved, and the content is 0.01% by weight.
If it is less than 5% by weight, the effect of crystal grain refinement will not appear, and if it exceeds 5% by weight, it will become a hindrance to the oxide that acts as a wetting agent.

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 ms made of alloy materials of the example and conventional example shown in the left column of Table 1 below were each cut to a length of 811 m, and two wires were placed in parallel, with one end having a width of 10+.
+++, length 13 inches, thickness 0. A brush was made by welding it to the metal phase of HA and bending a 2R arc-shaped contact part at the other end.

On the other hand, a slip ring with a diameter of 50+ia was made by punching out a temporary phase having a thickness of 0.5111 mm and made of alloy materials of examples and conventional examples having the compositions shown in the right column of Table 1 below. Therefore, a sliding contact device was made by combining these brushes and slip rings, and a sliding test was conducted under the following test conditions by bringing each brush into contact with the slip ring and rotating the slip ring in forward and reverse directions. The wear amount and contact resistance were measured, and the results shown in Table 2 below were obtained.

Test conditions Current: 40.6A Voltage: 12V Negative: Resistance Negative rotation speed: 1ooOrprn Circumferential speed: 120~130rn/river in Contact crab: 100g Sliding time: 7h (blank below) Table-2 The above As is clear from Table 2, the brushes and slip rings of the sliding contact devices of Examples 1 to 8 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 materials constituting the brushes of the sliding contact devices of Examples 1 to 80 are Sb, Te, Mo, and P during sliding.
b, Se.

Oxides such as As, Zn, and even 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 brush contact is reduced. This is because the surface is always clean and the contact resistance is low. In particular, the reason why the brush of the sliding contact device of Example 8 has much less wear than the brushes of the sliding contact devices of other examples is because the Fe group element is added to the material constituting the brush. The crystal grains are finely dispersed,
This is because the wear resistance has further improved.

In addition, the Cu alloy material constituting the slip ring of the sliding contact devices of Examples 1 to 8 suppresses the increase in stickiness during sliding and improves wear resistance. None other than that.

As detailed above, the sliding contact device of the present invention has significantly superior secondary abrasion resistance of the brush, commutator, or slip ring compared to conventional sliding contact devices, and generates extremely little wear. 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.

Applicant: Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] 1) Sb and T are added to an alloy material containing 87 to 93% by weight of Pd and 7 to 13% by weight of Ru without changing the composition ratio.
e. At least one of Mo, Pb, Se, As, and Zn is added to 0.
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% of Ag-Cu.
A sliding contact device combined with a commutator or slip ring made of an alloy material of 2% by weight-5% by weight of Cd or less. 2) sb added to the alloy material constituting the brush. 'T' e, M o, P b, 3 e, 8s
, a part of Zn is 0. F in the range of f11 to 0.5% by weight
2. The sliding contact device according to claim 1, wherein the sliding contact device is substituted with an e-group element.