Patent ID: 7380824
Filing Date: 2008-06-03
Classification: B60B,B62B,Y10S

Abstract:
1. A side frame assembly for an electric wheelchair suspension characterized by: a supporting frame unit including a rider-supporting frame, and a pivot portion connected fixedly to and disposed below said rider-supporting frame; a front caster assembly including a front caster frame disposed in front of said first frame unit, and a front caster disposed rotatably on said front caster frame; an upper link unit including an upper link having a front end connected pivotally to said front caster frame; a lower link unit including a lower link that is disposed under said upper link and that has a front end, which is connected pivotally to said front caster frame and which is disposed under said front end of said upper link; a drive wheel assembly including a drive wheel frame having a front lower end connected pivotally to said pivot portion of said supporting frame unit, and a rear upper end, a drive wheel disposed rotatably on said drive wheel frame, and a driving unit operable to rotate said drive wheel; and a connecting frame having an upper pivot portion connected pivotally to a rear end of said upper link, a lower pivot portion disposed under said upper pivot portion and connected pivotally to a rear end of said lower link, and a rear pivot portion that is disposed behind said upper and lower pivot portions, that is connected pivotally to said rear upper end of said drive wheel frame, and that is disposed under said rider-supporting frame of said supporting frame unit.