CRAWLER TRACTOR SUSPENSION Russian patent published in 1994 - IPC

FIELD: tractor engineering. SUBSTANCE: semirigid suspension has spring hinge-connected in its middle part with tractor frame resting by ends on rigid beam which, in its turn, rests by ends on bodies. Clearance is provided in middle between spring and rigid beam. Beam is secured to tractor frame in middle part through flexible members. When tractor operates as bulldozer, clearance is taken up under action of soil wedge, and suspension operates as rigid suspension which increases its grading properties. At recoiling suspension provides good damping of vibrations and higher speed. EFFECT: increased capacity of bulldozer at working and idling conditions. 2 dwg