JPS60121629A - 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 +A components of a plan, commutator, or slip ring constituting the sliding contact device.

The conventional sliding contact device has an A u of 60.5 to 64.5 and a weight of 1%.

A brush made of an alloy material containing 27 to 31% by weight of Ag and 6.5 to 10.5% by weight of Cu, and A g -Cd
It is composed of a commutator or a slip ring made of an alloy material containing 5 to 15% by weight of O.

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

On the other hand, commitake 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 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 ring is improved. .

The sliding contact device of the present invention has an A u of 60.5 to 64.5
Weight %, Ag 27-31 weight %, Cu 6.5-10
．． A brush made of an alloy material in which Si and Zr are added at a total δ1 of 0.5 to 10% by weight without changing the composition ratio, and Ag-Cu3 to 12% by weight. Amount of insects! u3-12jli amount%-case for I6 or Ag-
It is a combination of a retainer or a slip ring made of an alloy material with a weight of % or more.

Incidentally, Si is added to the alloy material constituting the bracket.

A part of Z' may be replaced with Fe group elements (1'e, Co, Ni) in a range of 0.01 to 0.5% by weight.

In the sliding contact device of the present invention, the brush is made of Au60.5.
-64.5m Lt%, Δg27-31 car 11%, Cu
A total of 0.5 to 10mkt% of Si and Zr is added to the alloy material of 6.5 to 1005% without changing the composition ratio.
The reason why it is made of an alloy material made by adding the above-mentioned Au-
This is to make the wear resistance of the 8g-Cu alloy material as hard as possible.If it is less than 0.5i (91%, it will not be able to achieve its full effect, and if it exceeds 10%, the amount of oxides generated will increase.) becomes more,
The contact resistance becomes high and, moreover, it becomes unstable.

Commutator or slip ring, Ag-Cu3~1
2% by weight or Ag-cu, 3-12Jtjt%-Cd
The reason why it is made of 5% by weight or less of alloy material is as shown in section 9. and. This is to suppress stickiness during sliding and improve wear resistance.
If the Cu content is less than 3% by weight, the effect cannot be obtained,
If the Cd content exceeds 12% by weight, the amount of oxide generated during sliding increases and the contact resistance becomes too high and becomes unstable.If the Cd content exceeds 5% by weight, when this becomes oxidized Cd,
Contact resistance increases 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.

However, St added to the alloy material constituting the brush,
When part of Zr is replaced with Fe group elements (Fe, Go, Ni) in the range of 0.01 to 0.5% by weight, the crystal grains can be made finer and the wear resistance can be further improved. If it is less than 0.01% by weight, no grain refining effect will be obtained, and if it exceeds 0.5% by weight, no further effect will be obtained.

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

Brush wire with a wire diameter of 0.7II11 made of the alloy material of the example and conventional example of the composition shown in the left column of Table 1 below) 4
WiL, two wires were cut in length 8m11, placed in parallel, one end was welded to a base material with width 1 (lag, length 131. thickness 0.2), and a circular arc-shaped contact part of 21mm was attached to the other end. A brush was made by bending it.Meanwhile, a slip ring with a diameter of 50 m5 was made by ladleping out a plate material with a thickness of 0.51 made of the alloy material of the example and conventional example with the composition shown in the right column of Table 1 above. A sliding contact device was made by combining these brushes and slip rings, and a sliding test was carried out under the following test conditions by bringing each plan into contact with the slip ring, and rotating the slip ring in forward and reverse directions. The wear amount and contact resistance of the brush and slip ring were measured, and the results were 1M as shown in Table 2 below.

Test conditions Current: +0.6A Voltage: 12v Load: Resistance load Rotation speed: 1000rpm Circumferential speed: 120-130m/min Contact force
:100g Sliding time Near h (Hereinafter, blank space) Table 2 As is clear from Table 2 above, the brushes and slip rings of the sliding contact devices of Examples 1 to 4 were the same as those of Conventional Examples 1 and 2, respectively. It can be seen that the amount of wear is significantly lower than that of the contact brush and slip ring, and the contact resistance is low and stable. This is because the alloy material constituting the brushes of the sliding contact devices of Examples 1 to 4 becomes hard due to the addition of St and Zr, improves adhesion resistance, and also reduces oxides generated during sliding. This is because the amount is in balance with the amount of wear. In particular, the amount of wear of the flan of the sliding contact device of Example 3.4 is even smaller than that of the brushes of the sliding contact devices of other examples because the brush is composed of + A material ζ I Pae group element This is because the crystal grains are finely divided and the wear resistance is further improved. In addition, the alloy material 011 constituting the slip ring of the sliding contact devices of Examples 1 to 4 suppresses the increase in stickiness during sliding and improves wear resistance. None other than that.

As described in detail in 1.1, the sliding contact device of the present invention has significantly superior wear resistance of the brush and commutator or slip ring compared to the conventional 177 moving contact device, and has abrasion resistance of 15).
There are very few generated goods, and there is almost no noise generation.
Furthermore, since the contact resistance is 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) A u 60.5-64.5ffiit%, A
g27-31i amount%. A brush made of an alloy material containing Cu6.5 to 10.5% by weight, with a total of 0.5 to 10% by weight of Si and Zr added without changing the composition ratio; Ag
A sliding contact device which is combined with a commutator or slip ring made of an alloy material containing 3 to 12flX amount of Cu or Ag-Cu3-12tf of 5% by weight or less. 2) Si added to the alloy material constituting the brush. Part of Zr is 0. 2. The IN dynamic contact device according to claim 1, wherein O is substituted with an Fe group element in an amount of 1 to 0.5 N.