Patent ID: 8585383
Filing Date: 2013-11-19
Classification: F01C,F04C

Abstract:
1. A scroll fluid machine comprising: a casing; a rotary shaft having a hollow portion, the rotary shaft being provided inside the casing and supported at a bearing for rotation; a pivot shaft provided in the hollow portion of the rotary shaft and supported at a bearing eccentrically located from an axial center of the rotary shaft for orbital revolution; an orbiting scroll engaged with a leading end of the pivot shaft for orbital revolution while being prevented from self-rotating by a self-rotation prevention mechanism; and a fixed scroll provided opposite the orbiting scroll, which defines a work chamber with the orbiting scroll, the scroll fluid machine further comprising: a fixed portion on a bottom of the casing; a swing column between the fixed portion and the orbiting scroll, or between the fixed portion and the pivot shaft to withstand the thrust load; the fixed portion includes a bearing fitted to one end of the swing column; the orbiting scroll or the pivot shaft includes a bearing fitted to the other end of the swing column; the swing column includes convex or concave spherical surface at one end and the other end; the swing column further includes the oil passage which penetrates through the axis core to supply the oil to the portion where the bearing of the fixed portion is fitted to the one end of the swing column, and to further supply the oil to the portion where the bearing of the orbiting scroll or the bearing of the pivot shaft is fitted to the other end of the swing column; the means for supplying the oil to the swing column; the one end of the swing column fitted to the bearing of the fixed portion serves as a support point; and the other end of the swing column fitted to the bearing of the orbiting scroll or the bearing of the pivot shaft revolves while following the movement of the orbiting scroll or the pivot shaft.