Patent ID: 6244125
Filing Date: 2001-06-12
Classification: B62D,F16H,Y10T

Abstract:
A movement transforming device, comprising:a moving shaft, supported inside a housing movably in the axial direction, having a thread groove formed on a circumferential surface thereof;a rotating cylinder, supported inside the housing rotatable on its axis, coaxially enclosing said moving shaft;three or more feed rings, having their axial centers inclined by an angle substantially equal with a lead angle of the thread groove, eccentrically held inside said rotating cylinder, each being engaged with the thread groove at a circumferential position of its inner circumferential surface;whereby rolling movement of said three or more feed rings along the thread groove transforms rotation of said rotating cylinder axial into movement of said moving shaft or the axial movement of said moving shaft into rotary movement of said rotating cylinder, andwherein said three or more feed rings are arranged along the axial direction of said rotating cylinder,the two of said three or more feed rings on both ends are fitted into mounting portions, which are formed on both end surfaces of said rotating cylinder so as to have circular openings corresponding to axial cross sectional shapes of the two feed rings, via the respective openings,the rest of the feed rings is fitted into a mounting portion, which is formed in a halfway portion of the circumferential wall of said rotating cylinder so as to have a slit-shaped opening corresponding to a side elevational shape of said rest of the feed rings, via the opening.