The TD bucket hoist adopts excavation loading, and the soybean enters continuously from top to bottom from the feed port and fills the base of the feed device at the same time, the continuous operation of the dustpan, its front eaves and side eaves continuously extract the material and the vertical lifting motion. Soybean hoist by digging feed, dustpan in the process of feeding the soybean force mainly occurs in the front eaves, side eaves and front wall (dustpan outer wall), the force nature is divided into extrusion pressure, impact, friction and shear force, these forces with Dustpan location, dustpan and material contact position changes, Is dynamic and complex.
Through the analysis of the structure, movement characteristics and feeding process of dustpan, it is found that the dustpan front eaves turning radius the largest, the movement speed is also the highest, in the process of feeding into the material depth is large, after a certain period of work dustpan the front eaves belong to the blunt blade, the force of the material can be considered as extrusion pressure. According to the analysis, the TD bucket hoist is loaded by digging, and the damage caused by dustpan to soybean mainly occurs in dustpan front eaves. Soybean grain from the feed port continuously into the bottom of the body, dustpan at the bottom from low to high to dig the material, due to the high feed mouth, resulting in high height of bean heap accumulation, the upper part of the bean heap will produce a greater pressure on the bottom soybean grain, due to the anti-force effect, in the process of dustpan picking, Dustpan front eaves will be the bottom of the soybean grain to produce a larger shear force Ft, in the process of dustpan reciprocating motion extraction, dustpan front wall to the front eaves will produce friction Ff to bean, easy to cause soybean damage. At the same time, the dustpan running speed is large during the excavation loading process, according to the impulse theorem, the impact force size is proportional to the speed difference before and after the impact, when the high-speed operation of Dustpan in contact with the bean of the moment, dustpan front eaves will produce a greater impact bean effect on FV, easy to produce damage,
Therefore, the purpose of reducing the transmission damage can be achieved by reducing the dustpan running speed.
