JPS60138874A - 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 more particularly to improvements in the materials of the brush and inmitator or slip ring constituting the sliding contact device.

The conventional tM moving contact device is )) d 30~70% 1 company% + AI? It consists of a brush made of 30 to 70 weight percent alloy material and a commutator or slip-link made of Ag-CdO, 5 to 15 weight percent alloy material.

By the way, the flange of this sliding contact device has poor 1li4 abrasion resistance when sliding with a commutator or slip ring, and easily generates abrasion powder, causing noise.

On the other hand, the commutator or slip link is Δt(−C
It was composed of an alloy material containing dO, 5 to 15% by weight, and had high stickiness and poor abrasion resistance when moving with a brush for 18 hours.

The present invention has been made to eliminate such drawbacks, and provides a sliding contact device that improves the wear resistance of the brush and the wear resistance of the commutator or slip ring. That is.

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

A g 30 to 70% by weight of alloy material, Sb, 'l''e, Mo, Pb, Se, Δ without changing the composition ratio.
S.

A brush made of an alloy containing 0.5 to 10% of the market weight of at least one of Z'n, and 8g-Cu3 to 1
2% by weight or Ag-Cu3-12i amount% Cd5% by weight M%
It consists of a commutator or slip ring made of the following alloy.

Incidentally, sb is added to the alloy monthly rate that constitutes the flage.

Some of Te, Mo, Pb, Se, As, Zn, 0.0
Fe group elements (Fe, Co
, 'Ni>.

In the sliding contact device of the present invention, the brush has Pd30 to 7
0% by weight, Ag30-70% by weight, S b, “l” e, Mo
.

At least one of Pb, Se, As, and Zn (), 5~
The reason why it is made of an alloy material containing 10% by weight is as follows.
This is to generate an appropriate amount of oxides that serve as lubricants in order to improve the wear resistance of the alloy H material of p d - A g, and if it is less than 0.5% by weight, the amount of oxides generated is small and it is not suitable as a lubricant. If the amount exceeds 10% by weight, the amount of oxides generated increases, contact resistance becomes high, and it becomes unstable.

Commutator or slip ring, Ag-CIJ3
~12% by weight or A g Cu 3-12jli amount%
The reason why the alloy is composed of less than 5% by weight of Cd is to suppress the adhesion during sliding with the flange and improve the wear resistance, and if the Cu content is less than 3% by weight, the effect will be less than 3% by weight. 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 content exceeds 5F10IJ%, when it becomes oxidized Cd, the contact resistance increases and the wear resistance deteriorates. Therefore, the content of Cu is 3 to 12% by weight, C
The content of d is such that it does not exceed 5% by weight.

Therefore, Sb added to the alloy constituting the brush,
-a13 of Te, MO, Pb, Se, As, Zn, 0
．． Fe group elements (Fe, C
When substituted with 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 will not appear; If it exceeds 5% by weight, the oxide that acts as a lubricant becomes a hindrance.

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

Brush wire rods with a wire diameter of 0.7 mm made of the example and conventional alloys shown in the left column of Table 1 below are each cut into lengths of 8 wires, and two wires are placed in parallel and one end is cut in width. A brush was made by welding it to a material with a length of 13++* and a thickness of 0.2111N, and a 21N arc-shaped contact part was bent at the other end. - Thickness of the alloy materials of the embodiments and conventional examples with the composition shown in the right column of Table 1 below: O-5mm O)
I made a slip ring with a diameter of 50 openings, which I use every month. 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 the brush into contact with the slip ring and rotating the slip ring in forward and reverse directions. The table below shows the wear and contact resistance of the slip ring measured.
The results shown in 2 were obtained.

Test conditions Current: 0.6A Voltage: 12V Load: Resistance load Rotation speed: 1000rpm Circumferential speed: 120-130m/min - Contact force: 100g Sliding time Near 11 (Left below margin) Table-2 As is clear from Table 2 above, the brushes and slip rings of the sliding contact devices of Examples 1 to 8 are different from those of the conventional example 1. 2
It can be seen that the amount of wear is significantly less than that of the sliding contact plan and the slip ring, and the contact resistance is the same. This is simply because the alloy material constituting the brush of the sliding contact devices of Examples 1 to 8 has Sb, 'f''e, Mo,
Pb, Se, As.

Z r + Furthermore, oxides such as Ni are generated, and these oxides act as lubricants, improving wear resistance, and the amount of oxides generated during sliding is balanced with the amount of wear. No. In particular, the reason why the brush of the sliding contact device of Example 8 has much less wear compared to the brush of the sliding contact device of other examples is that the li'' e group element is added to the material constituting the brush. This is simply because the crystal grains are finely divided, which further improves wear resistance. In addition, the Cu alloy phase constituting the slip ring of the sliding contact devices of Examples 1 to 8 increases the tackiness during sliding and improves wear resistance. Nothing but.

- As described in detail, the sliding contact device of the present invention has significantly superior wear resistance of flushing and commuting or slip links compared to conventional sliding contact devices, and generates extremely little wear powder. , there is almost no noise generation, and the conventional Ji
It can be said that it is an epoch-making device that can replace the Li contact device.

Applicant Tanaka Kikinzoku Jogyo Co., Ltd.

Claims (1)

[Claims] 1) I) d30-70 car 11%, Ag30-70 market weight%
Sb,i'' is added to the alloy material 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 1% by weight of OUIf, and 3 to 12% by weight of Heg-cu or A'g-C.
A sliding contact device which is combined with a commutator or slip link made of alloy H having a stopping power of 3 to 12% - Cd5jli. 2) sb added to the alloy material constituting the flange. 'I''e, MO, Pb, Se, Δs, some of Zn are 0
2. The sliding contact device according to claim 1, wherein the sliding contact device is substituted with an element of the 1e group in a range of 01 to 0.5%.