JPS60138877A - 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 The present invention relates to a sliding contact device, and particularly to improvements in the materials of the brush and commutator or slip ring that constitute the same.

Conventional IN moving contact devices have a P d of 30 to 70% by weight,
This is a combination of a brush made of an alloy material containing 30 to 70% Ag by weight, and a commutator or a slip ring made of an alloy material containing 0.5 to 5% Ag-Cd.

By the way, the flange of this sliding contact device wears when sliding with a commutator or slip ring, resulting in poor wear resistance and easy generation of abrasion powder, causing noise.

On the other hand, the commutator or slip ring is Ag-Cd
It was composed of an alloy material of 0.5 to 15% by weight, and had high adhesiveness and poor abrasion resistance when sliding with a brush.

The present invention has been made to eliminate such drawbacks, and aims to provide a sliding contact device in which the wear resistance of the brush is improved and the wear resistance of the commutator or slip ring is improved. .

The sliding contact device of the present invention has a Pd of 30 to 70%.

At least one of AI, Ga, Mn, and Ni is added to the alloy material weighing 30 to 70% by weight without changing the composition ratio.
A brush made of an alloy material containing 0.5 to 10% by weight of seeds, and 3 to 12% by weight of Ag-Cu or Ag-C.
It is combined with a commutator or a sulino pring made of an alloy material containing 3 to 12% by weight of U and 5% by weight of Cd or less.

In the sliding contact device of the present invention, the brush is l) d30
-70% by weight of AI, Ga, and Mn in an alloy material of 30-70% by weight of Ag without changing the composition ratio.

The reason why the composite material is constructed by adding 0.5 to 10% of at least one type of Ni is because of the softening during sliding to improve the wear resistance of the d-8 alloy material mentioned above. This is to prevent adhesion by suppressing the amount of oxide, and if it is less than 0.5% by weight, the effect cannot be achieved, and if it exceeds 10% by weight, the amount of oxide generated increases, contact resistance becomes high, and it becomes unstable. This is the result.

Commutator or slip ring, Ag(,:u3~
The reason why it is made of an alloy material of less than 12% by weight or Ag-Cu3-12% by weight-5% by weight of Cd is to suppress the stickiness during sliding with the brush and improve wear resistance.
If the content is less than 3% by weight, the effect cannot be obtained;
If the Cd content exceeds 5% by weight, the amount of oxide generated during sliding will be too large, resulting in high and unstable contact resistance, and if the Cd content exceeds 5% by weight, when this becomes oxidized Cd, the contact resistance will increase. This increases the wear resistance and deteriorates the wear resistance. Therefore, the content of Cu is 3 to 12% by weight, and the content of Cd is not more than 5% by weight.

Next, specific embodiments and conventional examples of the sliding contact device according to the present invention will be described.

Furan wire rods with a wire diameter of 0.7+ua made of alloy materials of the examples and conventional examples of composition not shown in the left column of Table 1 below were each cut into lengths of 8 pieces, and two pieces were placed in parallel. Width 10 at one end
1. A brush was made by welding a metal layer with a length of 13 mm, a thickness of Q, and 2 ss, and a 2R arc-shaped contact hole at the other end.

On the other hand, a slip knob ring with a diameter of 50 mm was made by subtracting the pseudophase with a thickness of 0.5 + s made of the alloy material of the example and the conventional example having the composition shown in the right column of Table 1 below. Therefore, a sliding contact device was made by combining these brushes and slip rings, and one writhing test was conducted under the following test conditions by bringing each brush into contact with the slip ring and rotating the slip knob ring in forward and reverse directions. When we measured the wear and contact resistance of the pickpocket ring, we obtained the results shown in Table 2 below.

Test conditions Current: 0.6A Voltage: 12V Load - Resistance load Rotation speed: 1000rpm Circumferential speed: 120-130m/min Contact crab 100g Sliding time = 7h (Left below blank) Table 2 As is clear from Table 2 below, the flange and slip ring of the sliding contact devices of Examples 1 to 4 are different from those of Conventional Examples 1 and 2, respectively.
It can be seen that the amount of wear is significantly lower than that of the sliding contact brush and slip ring, and the contact resistance is the same. This is because the alloy material constituting the brush of the sliding contact devices of Examples 1 to 4 is A1. This is because the addition of at least one of Ga, Mn, and Nt suppresses J13100 softening and improves secondary adhesion, and the amount of oxide generated during sliding is balanced with the amount of wear. Also, fruit
This is because the Cu alloy material forming the slip links of the sliding contact devices I to 4 suppresses the increase in stickiness during sliding and improves wear resistance.

As detailed above, the sliding contact device of the present invention has significantly superior wear resistance of the brush and commutator or slip ring compared to conventional sliding contact devices, generates extremely little wear powder, and generates no noise. It can be said to be an epoch-making device that can replace conventional sliding contact devices.

Applicant Tanaka Kikinzoku Kogyo Co., Ltd. (Company

Claims (1)

[Claims] AI and Ga are added to an alloy material containing 30 to 70% by weight of P d and 30 to 70% by weight of Ag without changing the composition ratio thereof. A brush made of an alloy material containing 0.5 to 10% by weight of at least one of Mn and Ni, and Ag-cu3
~12m1t% or A g -Cu' 3~12mff
f+ consisting of a commutator or slip ring made of an alloy material containing 1%-Cd 5% by weight or less.
J #J contact device.