JPS61156656A - Slide contactor - 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 have P d of 20 to 70% by weight, A
A brush made of an alloy material of 30 to 80% by weight;
It is combined with a commutator or slip ring made of an alloy material containing 0.5 to 15% by weight of Ag-Cd.

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 has a Pd of 20 to 70% by weight.

A brush made of an alloy material containing 30 to 80% by weight of Ag and 0.5 to 5% of C in Ag. ! Amount % and At, Ga.

It is combined with a commutator or a slip ring made of a material to which 0.5 to 10ffi of at least one type of Mn is added.

In the sliding contact device of the present invention, the brushes are made of the same Pd 20-70 weight 1% and Ag 30-
The reason why it is made of an alloy material containing 80% Li is to take advantage of its excellent corrosion resistance.

In addition, the reason why 0.5 to 5% by weight of C was added to Ag in the composition of the commutator or slip ring material was as follows.
This is to improve wear resistance by suppressing adhesion during scraping operations, and if it is less than 0.5% by weight, this effect will not be apparent, and if it exceeds 5% by weight, processing will become difficult. Furthermore, AI
The reason for adding 0.5 to 10% by weight of at least one of , Ga, and Mn is to increase the softening temperature during rubbing action with the brush and improve wear resistance. If the amount exceeds 10% by weight, the amount of oxides generated increases, contact resistance becomes high, and furthermore, it becomes unstable.

(Example and Conventional Example) Brush wire rods made of an alloy material of 60% by weight of Pd and 40% by weight of Ag and each having a wire diameter of 0.7 fl are cut into lengths of 8 fl, and two wires are arranged in parallel, with one end having a width of 10 mm and a length of 10 mm. Sa13f1. A brush was made by welding it to a composite material with a thickness of 0.2 mm and bending a 2R arc-shaped contact portion at the other end. On the other hand, the thickness 0 is made of the materials of the embodiments and conventional examples of the composition shown in the left column of the table below.
．． A slip ring with a diameter of 50t was made by punching out a 5mm plate. 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: 1000rpm Circumferential speed: 120~130m/min Contact cuff
100g Near sliding time (blank below) As is clear from the table above, the brushes and slip rings of the sliding contact devices of Examples 1 to 4 are different from the brushes and slip rings of the sliding contact devices of Conventional Examples 1 and 2, respectively. It can be seen that the amount of wear is small and the contact resistance is low and stable. This is because the materials constituting the slip rings of the sliding contact devices of Examples 1 to 4 are made of C to suppress adhesion, and Al, Ga, etc.
This is because the wear resistance is improved due to the increase in the softening temperature due to the addition of a small amount of Mn and Mn, and the amount of oxide generated during the rubbing operation is in balance with the amount of wear.

(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 the conventional sliding contact device, and the contact resistance is low and stable. It can be said that it can replace the sliding contact device.

Claims (1)

[Claims] A brush made of an alloy material containing 20 to 70% by weight of Pd and 30 to 80% by weight of Ag, 0.5 to 5% by weight of C in Ag, and 0.5 to 10% of at least one of Al, Ga, and Mn.
A sliding contact device consisting of a commutator or a slip ring made of a material containing % by weight.