根据起重机械和平面连杆机构等工作原理,提出了旋臂式电动升降机、叉车式起重机和四杆式液压升降机 3 种可适用于受限工作空间的车载升降装置设计方案。 主要研究了这 3 种方案完成预定运动和动力要求的执行机构部分,并基于系统运动方案设计原则,分析比较了 3 种方案的工作特点,确定了最佳的可行方案。

According to the working principle of lifting machinery and planar linkage etc, three design schemes for the vehicular lifting device suitable for use in restricted spaces were put forward, including whirling arm electric hoist, forklift type crane, and four-bar type hydraulic elevator. The actuators of the three schemes were studied, which can complete the expectant motion and power requirements. The working characteristics of the three schemes were analyzed and compared, and the optimal scheme was determined.