【摘要】 本文对林用门式起重机型式、基本参数和工作级别标准的制订进行了分析和论证。林用门式起重机的型式按吊具类型分为吊钩式和抓具式两种。基本参数包括额定起重量、跨度、悬臂有效伸距、起升高度及工作速度等。更多还原

【Abstract】 The paper analyzed and demonstrated the types, basic parameters, working grades of gantry crane and the forms of the new standard of gantry crane in forestry. The type of gantry crane can be divided into two types of lifting hookts and log grapple’s. The basic parameters consist of rated lifting capacity, span, lifting range, working speed, effective length of cantilever and etc. Finally, it introduces the present situation and future of gantry crane in forestry.更多还原