In the paper, the authors introduce the constitution of the convey system of the bearing race residual heat annealing production line with roller hearth furnace, with special attention to the structure and working principle of skip uncharging mechanism as well as the load performance of hydraulic cylinder. 介绍了轴承套圈余热退火辊底炉生产线炉外运输系统的组成,重点分析了翻卸料机构的结构特点、工作原理及液压缸的负载特性。