Patent ID: 8109351
Filing Date: 2012-02-07
Classification: B62D,E02F

Abstract:
1. A multi-link bridge in an undercarriage system, comprising: a center frame and a roller frame of the undercarriage system which are designed to move independently from each other; link connection brackets installed respectively at opposite side surfaces of the center frame and the roller frame; and a link bridge coupled to the link connection brackets, for connecting the center frame and the roller frame; wherein the movement of the roller frame is independent from the center frame in an up and down or vertical direction and a front and rear or longitudinal direction, wherein the link bridge is provided with a link housing having a body of which both side surfaces adjoining the center frame and the roller frame arc shaped in curved surface and two coupling holes which are formed in an inside of the body so as to pass through the body in parallel to each other and contain the connection pin for connecting to the center frame and the roller frame; and the link connection pins which are formed with a diameter enough to be inserted into the coupling holes of the link housing and rotatably couple each of the link connection brackets of the center frame and the roller frame to each of the coupling holes of the link housing, and wherein the coupling hole is formed with an inclined surface having a predetermined angle from a center portion of the housing of the link bridge toward an outside at an inner peripheral surface thereof, thereby enabling the roller frame connected to the center frame to rotates along the longitudinal direction of the frame by the inclined surface.