JPS61101980A - 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 (Industrial Application Field) The present invention relates to a sliding contact device, and particularly to materials for a brush, a commutator, or a slip ring constituting the sliding contact device.

(Prior art and problems) Conventional sliding contact devices have A u of 30 to 50% by weight, A
A brush composed of an alloy material containing g20 to 40% by weight and Pd 20 to 40% by weight, and a brush composed of an alloy material containing 20 to 40% by weight of Ag-Cu3 to 12ii by weight.
It is combined with a commutator or slip ring made of an alloy material containing 15 to 5% by weight of CdO.

However, in this sliding contact device, the brushes tend to wear out when sliding with the commutator or slip ring, causing noise generation.

On the other hand, commutators or slip rings have high stickiness and poor wear resistance when sliding with brushes.

(Object of the Invention) The present invention has been made in order to eliminate such drawbacks, and it is an object of the present invention to provide a sliding contact device that suppresses the wear of the brush and improves the wear resistance of the commutator or slide ring. It is something to do.

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

A brush made of an alloy material containing Ag2O to 40% by weight and Pd to 20 to 40% by weight, 3 to 12% by weight of Cu and 0.5 to 5% by weight of Cd in Ag, 3b, Te, and Pb.

Se, As, 7. It is combined with a commutator or a slip ring made of an alloy material to which 0.5 to 10% by weight of at least one type of n is added.

Note that a part of the elements added to the alloy material constituting the commutator or slip ring may be replaced with Fe group elements (Fe, Co, Ni) in a range of 0.01 to 0.5% by weight. .

In the sliding contact device of the present invention, the brushes are made of 30 to 50% by weight of Au and 20 to 40% by weight of Ag, the same as conventional brushes.
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.

3 to 12 commutators or slip rings in Ag
Besides adding wt % Cu and 0.5-5 wt % Cd S b r T e + P b , S e ,
0.5 to 10% by weight of at least one type of ASIZn
The reason why the alloy material was added was to generate an appropriate amount of oxide that acts as a lubricant to suppress stickiness when sliding with the brush and improve wear resistance, and 0.5% by weight. If it is less than 10% by weight, the amount of oxide generated is small and it cannot be effective as a lubricant, and if it exceeds 10% by weight, the amount of oxide generated is large, resulting in high contact resistance and instability. .

Therefore, some of the elements added to the alloy material constituting the commutator or slip ring include Fe group elements (Fe, Co, etc.) in a range of 0.01 to 0.5% by weight.

When substituted with Ni), the crystal grains can be made finer and the wear resistance can be further improved. If it is less than 0.01% by weight, the effect of grain refinement will not appear, and if it exceeds 0.5% by weight, the effect of grain refinement will not appear. This is a hindrance to oxides that act as lubricants.

(Example and conventional example) Au 40% by weight - Ag 30% by weight - Pd 30% by weight
Each brush wire with a wire diameter of 0.7- is made of an alloy material of
Cut one piece into 8 lengths, line them up and make one end 10 pieces wide.

Welded to a composite material with length 13 and thickness 0.2n, and 2 at the other end.
A brush was made by bending the arc-shaped contact part of R.

On the other hand, slip rings with a diameter of 50 nm were made by punching out plates with a thickness of 0.5 mm made of alloy materials having the compositions shown in the left column of the table 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. When we measured the amount of wear and contact resistance, we obtained the results shown in the right column of the table below.

Test conditions Current: 0.6A Voltage: 12cm Load: Resistance load Rotation speed: 11000rp Peripheral speed: 120-130m/min Contact crab 1
00g Sliding time Near time (blank below) As is clear from the table above, the brushes and slip rings of the sliding contact devices of Examples 1 to 7 are the same as 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 less than that of a ring, and the contact resistance is equally low and stable. This is simply due to the fact that the alloy material constituting the slip ring of the sliding contact devices of Examples 1 to 7 is Sb, 'l'e, and
, Pb, Se.

Oxides such as As, Zn, and even Ni are generated, and these oxides become /rJ lubricants, improving wear resistance.Since the oxides are soft, they are easily removed during sliding action, and the contact of the slip ring is improved. This is because the surface is always clean and the contact resistance is low and stable.

In particular, the reason why the slip ring of the sliding contact device of Example 7 has less wear compared to the slip rings of other sliding contact devices is that Fe group elements are added to the material constituting the slip ring. This is because the crystal grains are finely dispersed, which improves wear resistance.

(Effects of the Invention) As detailed above, the sliding contact device of the present invention has less wear on the brush and commutator or slip ring compared to conventional sliding contact devices, generates almost no noise, and has no contact Since the resistance is equally low and stable, it can be said to be an epoch-making device that can replace conventional sliding contact devices.

Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. too

Claims (1)

[Claims] 1) 30 to 50% by weight of Au, 20 to 40% by weight of Ag,
A brush made of an alloy material containing 20 to 40% by weight of Pd, 3 to 12% by weight of Cu in Ag, and 0.5 to 5% of Cd.
% by weight and a commutator or slip ring made of an alloy material containing 0.5 to 10% by weight of at least one of Sb, Te, Pb, Se, As, and Zn. . 2) Some of the elements added to the alloy material constituting the commutator or slip ring are 0.01 to 0.5% by weight.
The sliding contact device according to claim 1, characterized in that the Fe group element is substituted within the range of .