Optimal design and experiment of self-propelled salix stubble machine
Aiming at the problems of poor copying effect,low stubble quality and fast feed speed of traditional stubble trimmer in complex terrain environment,a self-propelled sand willow stubble trimmer is designed.Firstly,a 5-degree-of-freedom copying cutting table which can adapt to complex terrain is designed by using floating four-link,rotating locking shaft and cutter with sliding palm.Secondly,based on the three-minute transfer box,the transmission mode and route of the whole machine are designed to ensure that the sawing,copying and walking systems have sufficient power supply and do not interfere with each other.Through ADAMS multi-body dynamic simulation test,the motion track of saw blade in the process of stubble trimming machine is analyzed,and the original length of the selected tension spring is 624 mm and the working tension is 840 N.The length of the connecting rod is 500 mm,and the upper and lower copying quantity is 342 mm.The driving speed of the machine is 0.36 km/h,and the swing Angle of the cutting table is 45°.Finally,three representative landforms with different gradients are selected to carry out the stubble leveling test of outdoor prototype.The results show that the designed stubble trimmer can achieve 0-10 km/h stepless speed regulation,and the stubble breaking rates are 1.2％,1.9％and 3.6％,respectively,and the stubble height unqualified rates are 0.7％,1.9％and 3.2％,respectively,which are lower than 5％,and meet the quality requirements of stubble operation.
万方数据
维普
