JPH056771B2 - - Google Patents

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, commutator, or slip ring that constitute the sliding contact device. Conventional sliding contact device is made of Au8~12wt%, Pt8
A brush composed of an alloy material of ~12% by weight, Pd33-37% by weight, Ag28-32% by weight, Cu12-16% by weight, Zn0.1-2% by weight, and Ag-Cd0.5-15% by weight.
This is a combination of a commutator or a slip ring made of an alloy material. By the way, since the brush of this sliding contact device is made of the above-mentioned alloy material, when it slides with the commutator or the slip ring, abrasion powder is likely to be generated, resulting in unstable contact resistance. On the other hand, the commutator or slip spring is
It was composed of an alloy material containing 0.5 to 15% by weight of Ag-Cd, and had high stickiness and poor abrasion resistance when sliding with a brush. The present invention has been made in order to eliminate such drawbacks, and provides a sliding contact device with improved wear resistance and contact resistance characteristics of the brush and improved wear resistance of the commutator or spring. It is something to do. The sliding contact device of the present invention has a composition ratio of Au8 to 12% by weight, Pt8 to 12% by weight, Pd33 to 37% by weight, Ag28
~32wt%, Cu12~16wt%, Zn0.1~2wt%
Au-Pt-Pd-Ag-Cu-Zn is 95-99.5% by weight
and the remainder is at least one of Si and Zr in total
A combination of a brush made of an alloy material of 0.5 to 5.0% by weight and a commutator or slip ring made of an alloy material of 3 to 12% by weight of Ag-Cu or 3 to 12% of Ag-Cu - 5% by weight of Cd. It consists of In the sliding contact device of the present invention, the composition ratio of the brush is 8 to 12% by weight of Au, 8 to 12% by weight of Pt, and 33 to 37% by weight of Pd.
Weight%, Ag28~32wt%, Cu12~16wt%,
Au-Pt-Pd-Ag-Cu-Zn with Zn0.1~2wt%
The reason why the alloy material is composed of 95 to 99.5% by weight and the balance being at least one of Si and Zr and a total of 0.5 to 5.0% by weight is because of the contact resistance of the Au-Pt-Pd-Ag-Cu-Zn alloy material. This is to improve adhesion resistance in order to improve properties and wear resistance, and to improve at least one of Si and Zr, and the effect cannot be achieved if the total amount of at least one of Si and Zr is less than 0.5% by weight. First, if it exceeds 5% by weight, the amount of oxides generated increases, contact resistance increases, and furthermore, it becomes unstable. Ag-
The reason why it is made of an alloy material of 3 to 12% by weight of Cu or 3 to 12% of Ag-Cu to 5% by weight of Cd is to suppress the stickiness when sliding with the brush and improve wear resistance. If the Cd content is less than 3% by weight, the effect cannot be obtained, and if it exceeds 12% by weight, the amount of oxide generated during sliding becomes too large, resulting in high contact resistance and instability. If it exceeds % by weight, when it becomes oxidized Cd, the contact resistance will increase,
Abrasion resistance deteriorates. Therefore, the content of Cu is 3 to 12% by weight, and the content of Cd is 5% by weight.
It was designed not to exceed. Next, specific embodiments and conventional examples of the sliding contact device according to the present invention will be described. Brush wire rods with a wire diameter of 0.7 mm made of alloy materials of the example and conventional example shown in the left column of Table 1 below were each cut into lengths of 8 mm, and two wire rods were placed in parallel with one end having a width of 10 mm and a length of 8 mm. A brush was made by welding it to a base material with a length of 13 mm and a thickness of 0.2 mm, and a 2R arc-shaped contact part was curved at the other end. On the other hand, slip rings with a diameter of 50 mm were made by punching out 0.5 mm thick plates made of alloy materials having the compositions shown in the right column of Table 1 below. However, 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 sliding test under the following test conditions. The wear amount and contact resistance of the slip ring were measured and shown in Table 2 below.
The results were obtained as shown in . Test conditions Current: DC 0.6A Voltage: 12V Load: Resistance load Rotation speed: 1000 rotations/divided speed: 130 to 120m/min Contact pressure: 100g Contact time: 7 hours

【table】

[Table] As is clear from Table 2 above, the brushes and slip rings of the sliding contact devices of Examples 1 to 8 have a greater amount of wear than the brushes and slip rings of the sliding contacts of Conventional Examples 1 and 2, respectively. It can be seen that the contact resistance is significantly lower and the contact resistance is even lower and more stable. This is because the alloy material constituting the brush of the sliding contact device of Examples 1 to 8 suppresses softening during sliding due to Si, Zr, etc. and improves adhesion, resulting in wear resistance. This is because it improves your sexuality. Moreover, Examples 1 to 8
This is because the slip ring of the sliding contact device is made of Cu, which is an alloy material, which 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 has contact resistance. It is also much lower and more stable, so it can be said to be an epoch-making device that can replace conventional sliding contact devices.

Claims (1)

[Claims] 1 Composition ratio: Au8-12% by weight, Pt8-12% by weight,
Au-Pt-Pd-Ag-Cu with Pd33~37wt%, Ag28~32wt%, Cu12~16wt%, Zn0.1~2wt%
- A brush composed of an alloy material containing 95 to 99.5% by weight of Zn and the balance of at least one of Si and Zr in a total of 0.5 to 5.0% by weight, and 3 to 12% by weight of Ag-Cu or
A sliding contact device consisting of a commutator or slip ring made of an alloy material containing Ag-Cu3 to 12% by weight and Cd 5% by weight or less.