SEAT SUSPENSION STRUCTURE OF OPERATING MACHINE

PROBLEM TO BE SOLVED: To structure a seat suspension structure of an operating machine to have high durability while obtaining favorable seating comfort regardless of the size of a seating load, in which a driver's seat is supported vertically movably via a link mechanism above a seat support table, and lifted and energized by the elastic force of a suspension spring arranged between the driver's seat and the seat support stand having its shaft center set in a lateral posture. SOLUTION: This seat suspension structure is provided with a cam member 21 displaced vertically along with the vertical movement of the driver's seat 7, and a cam follower 22 displaced in the shaft center direction of the suspension spring 24 along with the vertical displacement of this cam member 21. One end of the suspension spring 24 is supported in the cam follower 22, and is configured to be displaced in an elastic force increasing direction along with the downward movement of the driver's seat 7. COPYRIGHT: (C)2008,JPO&INPIT