公开(公告)号：US3613811A

公开(公告)日：1971-10-19

申请号：US3613811D

申请日：1969-07-30

Applicant: TEXTRON INC

Inventor： BRANDLI RONALD I ,  KLEMA LAWRENCE E ,  REESE GERALD D

IPC: B62D55/108 ,  B62M27/02

CPC classification number: B62D55/108 ,  B62M2027/026

Abstract: A suspension system for a tracked vehicle is shown, having a unitary suspension frame including a pair of relatively flexible slide rails for engagement with the lower run of the drive track. Idler means mounted on the rear end of the frame support the rear end of the track. Front and rear pairs of sloping support arms are pivotally connected to the body at their upper ends and are connected to the frame at their lower ends by pivotable link members that accommodate limited relative longitudinal movements between the frame and the body. Front and rear suspension spring means are mounted between the body and the frame. Rearwardly and downwardly sloping control arm means are pivotally connected between the body and the front end portion of the frame so that the pivotal movements thereof force the frame away from the body when the frame moves forwardly with respect to the body, thereby forcing the drive track into tighter engagement with the ground. The front pair of support arms limits the pivotal movements of the control arm means.