PROGRESSIVE RATE SUSPENSION FOR AGRICULTURAL VEHICLE

摘要

A suspension apparatus connected to a wheel of a vehicle and includes a first linkage, a second linkage, a third linkage, a bell crank, and a shock absorber. The first linkage connects to the wheel. The second linkage includes a first portion that is pivotally connected to a second portion of the first linkage. The third linkage includes a first portion that is pivotally connected to a second portion of the second linkage. The bell crank includes opposed first and second arms and a central pivot connection to the third linkage, wherein the first arm is pivotally connected to a first portion of the first linkage. The shock absorber has a variable length and includes a first portion that is pivotally connected to the first portion of the third linkage and wherein a second portion of the shock absorber is pivotally connected to the second arm of the bell crank.