Patent ID: 7431254

Claim:
An axle mechanism capable of adjusting an elevation, comprising: a support member, being a rectangular board and having a board stand protruded from upper and lower portions on both sides of said support member, and said each board stand having a circular axle hole; a lower hinge device, installed at the bottom of said support member by two axles and having a fixing rod passing through a lower axle hole, three transversally arranged shaft rings, a vertical stand ring of a lower support stand, at least one resilient member and coupled to said fixing rod by an end plug, such that said support member produces a turning, a retardation and a positioning with respect to two lower support stands; an upper hinge device, installed at the top of said support member by two axles and having a movable rod passing through a vertical base ring of an upper support stand, three transversally arranged shaft rings, an upper axle hole, and at least one resilient member, and coupled to said movable rod by an end plug, such that said two upper support stands can produce a turning, a retardation or a positioning with respect to said support member; a dual link rod module, disposed on an external side of said support member and said each link rod module having two parallel pulling plates, and said two pulling plates having a bent section and a straight section disposed at opposite diagonal corners respectively, an axle bolt transversally extended from said each section and included by three shaft rings at the top and bottom and correspondingly coupled to ring holes disposed along the radial direction of said shaft rings, and a relay bolt which is not pivotally coupled between said two shaft rings pivotally coupled to said adjacent ring holes, and said shaft rings at the top and bottom being passed through by a fixing rod and a movable rod; such that when said support member is adjusted for its elevation and front and back distance, the turning radius of a dual link rod module is used as a moving range of said support member, and two sets of said pulling plates at the top can produce a pushing action and a pulling action for driving said shaft rings on both sides at the top to rotate synchronously, and driving said two movable rods to turn, without changing the original angle of said two upper stands, wherein said axle hole receives an axle sheathe and has a frictional plate disposed on an external side of said axle hole.