目前压路机转向机构的连接方式主要有键连接式和焊缝连接式2种。本文介绍的焊接连接有着结构简单、制造成本低、传动无间隙并可靠等优点.应用比较广泛。焊接连接不可拆卸、损坏修复困难,对焊缝的质量要求较高。如图1所示,这种焊接连接转向机构最容易出现的故障是连接焊缝开裂。保证焊缝质量是这种机 At present, the connection of the road roller steering mechanism mainly includes two kinds of key connection type and weld connection type. This article describes the welding connection has the advantages of simple structure, low manufacturing cost, no gap and reliable transmission, etc. It is widely used. Welding connection is not removable, damage repair difficult, the higher the quality of the weld. Shown in Figure 1, this kind of welding connection steering mechanism is the most prone to failure of the weld seam cracking. To ensure the quality of the weld is this machine