JPS61153969A - 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 (Field of Industrial Application) The present invention relates to a sliding contact device, and particularly to a combination of a brush material and a commutator or slip ring material constituting the same.

(Prior art and problems) Conventional sliding contact devices contain 30 to 50% by weight of Au, A
A brush made of an alloy material containing 20 to 40% by weight of g, 20 to 40% by weight of Pd, and 0.5 to 15% by weight of Ag-Cd.
This is a combination of a commutator or a sling ring made of an alloy material.

However, this sliding contact device exhibits high stickiness during sliding operation and has poor abrasion resistance.

(Object of the Invention) The present invention has been made to eliminate such drawbacks, and aims to provide a sliding contact device that suppresses brush wear and improves the wear resistance of the commutator or slip ring. be.

(Structure of the invention) The sliding contact device of the present invention contains 30 to 50% by weight of Au.

A brush made of an alloy material containing 20 to 40% by weight of Ag, 20 to 40% by weight of Pd, and 0.5 to 15% by weight of Cd oxide in Ag, Sb, Te, Pb, Se, and As.

It is combined with a commutator or a slip ring made of a material in which 0.5 to 10% by weight of at least one Zn oxide is uniformly and finely dispersed.

In the sliding contact device of the present invention, the brush is made of 30 to 50% by weight of Au and 20 to 40% by weight of Ag, the same as the conventional brush.
The reason why it is made of an alloy material containing 20 to 40% by weight of Pd is as follows.
This is to take advantage of its excellent corrosion resistance.

In addition, in the composition of the commutator or slip ring material, the reason why 0.5 to 15% by weight of Cd oxide is uniformly and finely dispersed in Ag is to increase the lubricity and improve the wear resistance of Ag. If it is less than 0.5% by weight, it has no effect, and if it exceeds 15% by weight, the contact resistance becomes high and unstable. Furthermore, Sb, Te, Pb, Se, As
, 0.5 to 10% by weight of at least one oxide of Zn
The reason for uniformly and finely dispersing is to increase the softening temperature and suppress adhesion during the rubbing operation to improve wear resistance.
If it is less than 5% by weight, the effect will be weak, and if it exceeds 10% by weight, processing will become difficult.

(Example and conventional example) Au 40% by weight - Ag 30% by weight - P d 30% by weight
Brush wire rods made of an alloy material with a wire diameter of 0.7B were each cut into lengths of 8fl, and two wires were placed in parallel with one end having a width of 10fi.

Welded to a composite material with a length of 13fl and a thickness of 0.2N, and a
A brush was made by bending the arc-shaped contact part of R.

On the other hand, a thickness of 0.5 mm made of the materials of the example (by internal oxidation method) and the conventional example of the component composition shown in the left column of the table below.
I made a slip ring with a diameter of 5o by punching out the fin board. Therefore, a sliding contact device was made by combining these brushes and slip rings, each brush was brought into contact with the slip ring, and the slip ring was rotated in forward and reverse directions to conduct a friction test under the following test conditions to determine the wear of the brushes and slip rings. When the amount and contact resistance were measured, the results shown in the right column of the table below were obtained.

Test conditions Current: 0.6A Voltage: DC12V Load: Resistance load Rotation speed: IQOO rpm Peripheral speed: 120-130 m/min Contact crab 100g Sliding time near time (The following margins are clear in the table above) As shown, the brushes and slip rings of the sliding contact devices of Examples 1 to 7 have less wear than the brushes and slip rings of the sliding contact devices of Conventional Examples 1 and 2, respectively, and the contact resistance is low and equally stable. This is because the material constituting the slip ring of the sliding contact devices of Examples 1 to 7 has the lubricating effect of Cd oxide and the S
b, Te.

Abrasion resistance is improved by suppressing adhesion by oxides of Pb, Se, As, and Zn, and these oxides are uniformly and finely dispersed and do not accumulate, resulting in low and stable contact resistance. No.

(Effects of the Invention) As detailed above, the sliding contact device of the present invention has less wear on the brush, commutator, or slip ring than conventional sliding contact devices, and the contact resistance is equally low and stable. , it can be said that it can replace the conventional sliding contact device.

Claims (1)

[Claims] Au30-50% by weight, Ag20-40% by weight, Pd2
A brush made of 0 to 40% by weight alloy material, and Ag
0.5 to 15% by weight of Cd oxide and Sb, Te,
At least one of the oxides of Pb, Se, As, and Zn is
．． A sliding contact device consisting of a commutator or a slip ring made of a material in which 5 to 10% by weight is uniformly and finely dispersed.