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Sliding member, rotating machine, and sliding member manufacturing method

A technology of sliding parts and manufacturing methods, which can be applied to contact manufacturing, electric components, brush manufacturing, etc., and can solve problems such as high temperature

Active Publication Date: 2017-02-22
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, the brushes and commutator become hot due to resistive losses and sliding contact (friction)

Method used

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  • Sliding member, rotating machine, and sliding member manufacturing method
  • Sliding member, rotating machine, and sliding member manufacturing method
  • Sliding member, rotating machine, and sliding member manufacturing method

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other Embodiment approach

[0139] In addition, in the above-mentioned embodiment, although this invention is applied to the motor which converts electric energy into rotational energy (rotational force), it is not limited to this. In practice, for example, it can also be applied to a generator that converts rotational energy (rotational force) into electrical energy.

[0140] In addition, in the present embodiment, the first metal is a pure metal composed of Sn, but it is not limited thereto. In practice, the first metal may be an alloy containing Sn.

[0141] In addition, in the above-mentioned embodiment, the second metal is a CuNi alloy, but it is not limited thereto. In practice, the second metal may be CuMn alloy, AgPd alloy, CuAl alloy or CuCr alloy. For example, when the second metal is a CuMn alloy, an intermetallic compound containing at least two selected from Cu, Mn, and Sn is generated by the reaction of molten Sn (first metal) and CuMn alloy (second metal).

[0142] In addition, in the a...

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Abstract

A motor device is equipped with a casing, a permanent magnet, a rotor, and a brush (7). The rotor has a commutator electrically connected to an armature and an armature coil and provided on a rotating shaft rotatably supported inside the casing. The brush (7) is equipped with an arm portion (51), a fixed portion (60), and a sliding contact portion (20). The sliding contact portion (20) of the brush (7) has a sliding contact surface (71) involved in the rotation of the rotor (3). The brush (7) always slidingly contacts the commutator and has a function of supplying current to the armature coil. The brush (7) and the commutator reach a high temperature due to ohmic loss and sliding contact. The sliding contact portion (20) is constituted by including an intermetallic compound phase produced by a chemical reaction between a first metal and a second metal.

Description

technical field [0001] The present invention relates to a sliding member having a sliding contact surface related to rotation, a rotating machine including the sliding member, and a method for manufacturing the sliding member. Background technique [0002] Conventionally, motors and dynamos have been widely used as rotating machines that convert electric energy and rotational energy. The rotating machine includes a sliding member having a sliding contact surface involved in rotation. The sliding parts are brushes or commutators. [0003] For example, in a motor, the brush has the function of always slidingly contacting the commutator so that the current flows in the coil. In addition, the brushes and commutator become high temperature due to resistive losses and sliding contact (friction). Therefore, the life of the motor largely depends on the durability of the brushes. Therefore, Patent Documents 1 to 6 disclose brushes excellent in durability. [0004] Patent Documen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K13/00H01R39/20H01R43/16
CPCC22C9/06C22C9/00H01R39/20H01R43/12H02K5/145H01R43/16
Inventor 野口真纯
Owner MURATA MFG CO LTD