Patent ID: 6361296
Filing Date: 2002-03-26
Classification: F04C

Abstract:
A scroll-type compressor comprising a closed housing having a gas inlet and outlet; a support frame fixed in said closed housing; a scroll-type compressing mechanism which has a fixed scroll and an orbiting scroll disposed above said support frame and engaging with each other, wherein said fixed scroll is fastened to said support frame, and said orbiting scroll is supported by and in slidable contact with said support frame; a rotating shaft which is disposed below said scroll-type compressing mechanism, extends upward by penetrating said support frame and is fitted in a boss of said orbiting scroll at an eccentric pin portion at the upper end via an eccentric bush and a bearing; a motor for driving said orbiting scroll via said rotating shaft; and an oil pump provided at the lower end of said rotating shaft,said rotating shaft and said eccentric pin portion being formed with an oil supply hole, which communicates with said oil pump and is open at an upper end face of said eccentric pin portion, so that lubricating oil is provided through said oil supply hole in response to said oil pump being driven and at least some of the lubricating oil flowing out of said oil supply hole is supplied to said bearing, wherein a gap is formed between an outer peripheral surface of said eccentric pin portion and an inner peripheral surface of said eccentric bush, and said scroll-type compressor further comprises an annular flat plate member positioned between a lower end face of said eccentric bush and an upper end face of said rotating shaft so as to substantially cover a lower end of said gap.