This paper deals with size selection of four linkages mechanism in step, calculating push force of closed cylinder and strength of grab arm in hydraulic timber grabs. And also it provides a practical method for grab designing.
She Xiaotao.
A STUDY ON SOME PROBLEMS IN DESIGNING HYDRAULIC TIMBER GRABS[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 1993, 17(04): 66-69 https://doi.org/10.3969/j.jssn.1000-2006.1993.04.014