| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To compact the construction of the compressor of an air-conditioner furthermore and suppress the cost upon enhancing the cooling efficiency of the air-conditioner. <P>SOLUTION: The shell-form outer ring 2a of a needle roller bearing 1a to support the main shaft 11 of the compressor is made from a steel plate of middle-high carbon content in which the carbon content is 0.3 mass % or more, and at least the raceway surface of the outer ring 2 formed through press working is subjected to high-frequency quenching. Thereby the strength from the surface to the inside of the outer ring 2a is heightened quickly using a simple heat treatment facility without requiring atmospheric adjustment, and the lifetime of the shell type needle roller bearing 1 depending upon a surface-originating exfoliation or an internally originating exfoliation is secured sufficiently, and compacting the compressor furthermore and suppressing the cost are accomplished upon enhancing the cooling efficiency of the air-conditioner. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
