变力激振式香榧手持采摘设备的设计与试验OA

In order to solve the problem of low maturity consistency of mechanized harvesting,a variable force excitation handheld picking equipment was designed.According to the agronomic characteristics and mechanical characteristics of the results of Torreya grandis'Merrillii'Hu,the working principle of the variable force excitation picking equipment was determined,and a biaxial variable force adjustment crank was designed,which was adapted to the picking conditions of different kinds by adjusting the radial position of the deflection block,and the drop of the fruit was realized when the ex-citation force generated by the crank movement was greater than the binding force of the fruit stalk.The static structure and modal analysis of the picking head frame were carried out by ANSYS finite element software,the appropriate excita-tion frequency and crank parameters were determined by single factor test,and the three-factor and three-level combina-tion test was carried out by Design-Expert13.According to the analysis of variance of the experimental results,the pa-rameter optimization was based on the maximum picking rate of ripe fruit,the minimum picking rate of immature fruit,and the minimum mispicking rate of young fruit,the optimized parameters was obtained:the vibration radius of 120 mm,the crank speed of 1,500 r/min and the eccentric mass of 1,000 g,the picking rate of ripe fruit,the picking rate of im-mature fruit and the mispicking rate of young fruit were 86.46%,6.37%and 2.59%,respectively.The results could provide a reference for the subsequent mechanized harvesting of Torreya grandis 'Merrillii' Hu.