JPS60133606A - 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.

The conventional sliding contact device has A u 18-22M amount%, p
t3-7% by weight, Pd43-47% by weight, Ag28-3
A brush made of 2% by weight alloy material and Ag-Cd
It is combined with a commutator or slip ring made of an alloy material of 0.5 to 15% by weight.

By the way, the brush of this sliding contact device tends to adhere and generate abrasion powder when sliding with a commutator or slip ring, causing noise.

On the other hand, the commutator or slip ring is Ag-, C
It was composed of an alloy material containing d0.5 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 A'ulB ~22% by weight.

Pt3-7% by weight, Pd43-47% by weight, Ag28-
A brush made of an alloy material in which 0.5 to 10% by weight of at least one of W, V, and Ta is added to a 32% by weight alloy material without changing the composition ratio, and Ag-Cu.
3-12% by weight or Ag-Cu3-12% by weight-Cd5
It is combined with a commutator or slip ring made of an alloy material of less than % by weight.

Note that W is added to the alloy material constituting the brush.

V, a part of Ta is F in the range of 0.01 to 0.5% by weight.
It may be replaced with an e-group element ('Fe, Co, Ni).

In the sliding contact device of the present invention, the brush is made of Au18-2
2 wt%, 'Pt3~7 wt%, P wt%-Pd43~
47g 28-32% by weight of alloy material, without changing the composition ratio, at least one of W, V, Ta from 0.5 to 0.5%
The reason why it is made of an alloy material with 10% addition by weight is as follows.
This is to increase the softening temperature in order to improve the adhesion resistance of the Au-PL-Pd-Ag alloy material. If it is less than 0.5% by weight, the effect cannot be exhibited, and if it exceeds 10% by weight, the oxide The amount of contact increases, the contact resistance increases, and it becomes 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 adhesion when sliding with the brush and improve wear resistance, but 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 and unstable contact resistance.If the Cd content exceeds 5% by weight, when this becomes oxidized Cd, the contact resistance will increase. This increases the wear resistance and deteriorates the wear resistance. Therefore, C
The content of u is 3 to 12% by weight, and the content of Cd is 5% by weight.
It was designed not to exceed.

Therefore, W and V added to the alloy material constituting the brush
, a part of Ta is mixed with Fe in a range of 0.01 to 0.5% by weight.
When substituted with group elements (Fe, Co, Ni), the crystal grains can be made finer and the wear resistance can be further improved, but if it is less than 0.01% by weight, the effect of grain refinement will not appear. , even if it exceeds 0.5% by weight, no further effect can be obtained.

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

Brush wires with a wire diameter of 0.7 mm made of alloy materials of the example and conventional example shown in the left column of Table 1 below are each cut into lengths of 31 m, and two wires are placed in parallel, with one end having a width of 10 m (
A brush was made by welding to a base material with a length of 13 mm and a thickness of 0.211 m, and a 2R arc-shaped contact portion was bent at the other end. On the other hand, a slip ring with a diameter of 50 mm was made by punching out a plate material having a thickness of 0.5+U and made of an alloy material having the composition 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: o, e A Voltage = 12 ■ Load: Resistance load Rotation speed: 1000 rpm Circumferential speed: 120-130 m/min Contact cuff 100 g Sliding time Near h (margins below) Table 2 As is clear from Table 2 above, the brushes and slip rings of the sliding contact devices of Examples 1 to 4 have significantly less wear than the brushes and slip rings of the sliding contact devices of Conventional Example 1.2, respectively. It can be seen that the contact resistance is equally low and stable. This is because the softening temperature of the alloy material constituting the brush of the sliding contact devices of Examples 1 to 4 is increased by the addition of at least one of W, V, and Ta, and the adhesion resistance is improved. This is also because the amount of oxide generated during sliding is balanced with the amount of wear. In particular, the reason why the brush of the sliding contact device of Example 4 has less wear compared to the brush of the sliding contact device of other examples is that Fe group elements are added to the material constituting the brush, and the crystals of This is because the particles are finely dispersed, which improves wear resistance.

In addition, this is because the Cu alloy material 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. .

As detailed above, the sliding contact device of the present invention has significantly superior wear resistance of the brush and commutator or slip ring compared to conventional sliding contact devices, generates extremely little wear powder, and generates no noise. 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) Au18-22% by weight, pt3-7% by weight, Pd4
3 to 47% by weight, Ag 28 to 32% by weight alloy material,
A brush made of an alloy material in which 0.5 to 10% by weight of at least one of W, V, and Ta is added without changing the composition ratio, and 3 to 12% by weight of Ag-Cu or Ag-
A sliding contact device comprising a commutator or a slip ring made of an alloy material containing 3 to 12% by weight of Cu and 5% by weight or less of Cd. 2) W added to the alloy material constituting the brush. The sliding contact device according to claim 1, wherein a part of V, "I"a is substituted with a p' e group element in a range of 0.01 to 0.5% by weight. .