一、前言 近年来,我厂先后设计,研制了东方红-60、40A、50(65)、小四轮拖拉机和东方红-90履带拖拉机等新型拖拉机。为了加快样机的改进、定型过程,必须采用台架快速强化试验,以弥补田间使用试验周期长,费用高,试验条件难以控制等缺点。其中液压悬挂系统综合试验台在研制过程中,注意到了当前国内外拖拉机液压悬挂系统及元件 I. Introduction In recent years, our factory has designed and developed new tractors such as Dongfanghong-60, 40A, 50 (65), small four-wheel tractor and Dongfanghong-90 crawler tractor. In order to speed up the improvement of the prototype, the process of setting up must adopt the rapid strengthening test of the bench to make up for the disadvantage of the field using long test period, high cost, difficult test conditions and so on. One hydraulic suspension system test bed in the development process, noticed the current domestic and international tractor hydraulic suspension system and components