JPS61156659A - 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 contain 20 to 70% by weight of Pd and 3% Ag.
A brush made of 0 to 80% by weight alloy material, and Ag
- It is combined with a commutator or slip ring made of an alloy material containing 0.5 to 15% by weight of 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 contains 20 to 70% by weight of Pd.

A brush made of an alloy material containing 30 to 80% Ag by weight, and 0.5 to 5% C by weight in Ag and W, V, M.

A commutator or pickpocket ring made of a material to which 0.5 to 10% by weight of at least one of the above is added.

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 P d 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, W,
0.5 to 10% by weight of at least one of V and Mo
The reason for adding it is to increase the softening temperature during the rubbing action with the brush and improve wear resistance.If it is less than 0.5% by weight, this effect cannot be achieved, and if it exceeds 10% by weight, the oxide The amount of contact increases, the contact resistance increases, and it becomes unstable.

(Example and Conventional Example) Brush wires made of an alloy material of 60% by weight of Pd and 40% by weight of Ag, each having a wire diameter of 0.7 fl, were cut into lengths of 8 fl, and two wires were arranged in parallel with one end having a width of 10 n and a length of 10 n. sa13fi
A brush was made by welding to a 0.2 m thick composite material and bending a 2R arc-shaped contact part at the other end. On the other hand, a slip ring with a diameter of 5 (lfi) was made by punching out a plate material with a thickness of 0.5 fl made of the materials of the example and conventional example with the component compositions shown in the left column of the table below. A sliding contact device was made by combining each brush, each brush was brought into contact with the slip ring, and the slip ring was rotated forward and backward to conduct a sliding test under the following test conditions, and the wear amount and contact resistance of the brush and slip ring were measured. The results shown in the right column of the table below were obtained.

Test conditions Current 7 0.6A Voltage: DC12V Load: Resistance load Rotation speed: 1000rpm Circumferential speed 7 120-130m/min Contact crab
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 simply due to the fact that the materials constituting the slip rings of the sliding contact devices of Examples 1 to 4 suppress adhesion by C, and W, V, M
This is because the wear resistance is improved due to the increase in the softening temperature caused by the addition of at least one type of o, and the amount of oxide generated during the rubbing 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 10% by weight of at least one of W, V, and Mo. A sliding contact device consisting of a commutator or a slip ring made of a material with % additive.