JPS61156653A - 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 composed of a commutator or a slip ring made of an alloy material of Ag-CdO, 5 to 15% by weight.

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 20 to 70% by weight of Pd.

A brush made of an alloy material containing 30 to 80% by weight of Ag, 0.5 to 5% by weight of C in Ag, and B, St, and Ge.

It is combined with a commutator or slip ring made of a material containing 0.5 to 10% by weight of at least one type of Tl.

In the sliding contact device of the present invention, the reason why the brush is made of the same alloy material as conventional brushes, which is 20 to 70% by weight of Pd and 30 to 80% by weight of Ag, 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, B,
At least one of S i, Ge, 7' 1 is 0
．． The reason for adding 5 to 10% by weight is to generate an appropriate amount of oxides that act as a lubricant to improve wear resistance during sliding action with the brush.If it is less than 0.5% by weight, the amount of oxides generated is If the amount is too low, it will not be effective as a lubricant, and if it exceeds 10 M%, a large amount of oxide will be generated, resulting in high contact resistance and instability.

(Example and Conventional Example) Brush wires made of an alloy material of 60% by weight of Pd and 40% by weight of Ag and each having a wire diameter of 0.7fl were cut into lengths of 8N, and
The books are lined up and one end has a width of 10cm, a length of 13fi, and a thickness of 0.
A brush was made by welding a 2 m long piece of composite material and bending a 2R arc-shaped contact part at the other end. On the other hand, the thickness Q is 5 m made of the materials of the example and conventional example of the component composition shown in the left column of the table below.
A slip ring with a diameter of 50w5 was made by punching out a 50w5 m 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 5 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 material constituting the slip ring of the sliding contact devices of Examples 1 to 5 has resistance due to the suppression of adhesion by C and the cleaning action of oxides of B, St, Ge, and Tl generated during the sliding action. This is because the wear resistance is improved and the amount of oxides generated during the scraping operation is balanced 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 5% of at least one of B, Si, Ge, and Tl.
A sliding contact device combined with a commutator or slip ring made of a material containing 10% by weight.