针对ＹＺ３５型牙轮钻机主机构在使用过程中存在的问题，应用国际上最新的无链加压技术对其结构进行改造。改进后的新型无链加压提升主机构具有钻进效率高、维护简单、故障率低等特点 In view of the problems existing in the use of main structure of YZ35 type cone drill rig, the structure of the main structure of YZ35 type roller rig is modified with the latest chainless pressurization technology in the world. The improved new chain-free pressurized main structure has the advantages of high drilling efficiency, simple maintenance and low failure rate