Fresh corn harvest operation at the beginning,corn directly hit the bottom of the ear box will produce serious mechanical damage,in order to reduce the damage at this stage,with the ear box design of an impairment ear box cover,the box cover was mainly composed of loss plate,four-bar drive mechanism,buffer spring.Through the kinetic energy a-nalysis of a single corn in the fresh corn harvester operating without cover,the minimum damage deformation energy of a single corn operating without cover was obtained,and the damage in the subsequent operation with cover was compared and analyzed.The four-bar dynamic mechanism of ear box cover was designed to satisfy the operation effect.The maxi-mum load of the buffer spring was obtained by analyzing the force of the buffer spring,so as to determine the parameters of the buffer spring.The theoretical deformation energy of fresh corn touching the bottom of the box was calculated by an-alyzing the falling collision motion of fresh corn with cover.The deformation energy at this time was much less than that of the operation without cover,which proved the possibility of loss in the process of harvesting fresh corn with cover.The design of fresh corn ear box cover was verified in the field.The results of the field test showed that the ear box cover had obvious protection effect on fresh corn at the beginning of harvest.Meanwhile,the damage degree of the middle position of the ear box bottom was lower than that of the edge position,which met the expected loss reduction effect of the ear box cover.
国家科技期刊平台
NSTL
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