Sliding member, rotary device, and method for manufacturing sliding member

Patent metadata

Field	Value
Publication number	US-10505328-B2
Application number	US-201615364772-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Jun 20, 2014
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A slide-contact portion of a motor has a slide-contact face that contacts a rotating rotor. The slide-contact portion is composed of a material containing an intermetallic compound phase produced by chemical reaction between a first metal which is Sn or an alloy including Sn and a second metal which is a CuNi alloy, a CuMn alloy, an AgPd alloy, a CuAl alloy, or a CuCr alloy.

First claim

The invention claimed is:

1. A sliding member for a rotary device, the sliding member comprising:
a slide-contact portion having a slide-contact face that contacts a rotating object, wherein
the slide-contact face that contacts the rotating object contains an intermetallic compound that is an alloy containing one of (1) at least two selected from a first group consisting of Sn, Cu and Ni, and (2) at least two selected from a second group consisting of Sn, Cu, and Mn.

2. The sliding member according to claim 1 , wherein the intermetallic compound is the result of a reaction between a first metal which is Sn or an alloy including Sn and a second metal which is a CuNi alloy, a CuMn alloy, an AgPd alloy, a CuAl alloy, or a CuCr alloy.

3. The sliding member according to claim 2 , further comprising an arm section composed of a third metal bonded to the slide-contact portion with an alloy layer composed of the first metal and the third metal interposed therebetween.

4. The sliding member according to claim 1 , wherein the intermetallic compound is a CuNiSn alloy.

5. The sliding member according to claim 1 , wherein the intermetallic compound is one of Cu 6 Sn 5 , Ni 3 Sn 4 and Cu 2 NiSn.

6. The sliding member according to claim 1 , wherein the slide-contact portion is a portion of a commutator or a brush.

7. The sliding member according to claim 1 , wherein the slide-contact portion further contains carbon.

8. The sliding member according to claim 1 , wherein the slide-contact portion is a porous material.

9. The sliding member according to claim 8 , wherein the slide-contact portion has a porosity of 0.1 to 60%.

10. The sliding member according to claim 1 , further comprising an arm section bonded to the slide-contact portion with a conductive bonding material.

11. A rotary device comprising:
the slide-contact portion according to claim 1 ; and
a rotor contacting the slide-contact portion.

Assignees

• Murata Manufacturing Co

Inventors

• Noguchi Masumi

Classifications

• C22C9/00

  Alloys based on copper · CPC title

• H02K5/145

  Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes · CPC title

• H01R43/12

  Manufacture of brushes · CPC title

• H01R39/20 Primary

  characterised by the material thereof · CPC title

• C22C9/06

  with nickel or cobalt as the next major constituent · CPC title