Research on the Influence of the Ratio of Normal and Tangential Digging Resistance on the Stability against Leaning Forward of Backhoe Hydraulic Excavator

摘要

This paper begins with the essence how fore-rake happens, and followed by the analysis of the influence of different ratios of normal and tangential digging resistance (marked as X for short) on fore-rake stability of complete appliance, and we get curves describing how the fore-rake stability changes along with X. At the same time, we get a series of λ-K curves with different digging depth or bucket capability, through which we can study the influence of digging depth and bucket capability on λ-K. curves. Furthermore, we have studied the relationship between digging depth and the critical X when fore-rake instability phenomenon happens. The work in this paper has theory and application significance on the analysis of stability of excavator.