CAJ | 학술논문

针对现有挖拔式木薯收获机夹持输送机构出现夹持掉带掉薯、夹持对中困难及木薯茎秆难以进入夹持输送机构等问题，研究设计了夹持输送机构。该机构采用拉簧安装在移动杆凹槽内，移动杆与机架间为移动副连接的方式夹紧木薯茎秆，并将其与摇杆与机架间为转动副连接的方式进行了对比分析。结果表明：移动副连接使拉簧的拉力全部提供为夹持力，无拉力损失，夹持力最大；同时，自动调节带间距，夹持牢固。根据土薯生物环境特性，设计了夹持轮、带轮、夹持带、张紧装置和导向装置等主要结构，并对各结构进行了分析，确定了主要结构参数。根据木薯块根拔起时的速度分解图，建立了块根拔起时的力学模型，且通过分析推导得到了夹持输送机构对块根的拔起力和对茎秆的夹持力计算公式。该研究对于快速拔出、输送薯块、减少薯块损失、降低伤薯率、提高挖拔式木薯收获机整机性能具有重要意义。
침대현유알발식목서수획궤협지수송궤구출현협지도대도서、협지대중곤난급목서경간난이진입협지수송궤구등문제，연구설계료협지수송궤구。해궤구채용랍황안장재이동간요조내，이동간여궤가간위이동부련접적방식협긴목서경간，병장기여요간여궤가간위전동부련접적방식진행료대비분석。결과표명：이동부련접사랍황적랍력전부제공위협지력，무랍력손실，협지력최대；동시，자동조절대간거，협지뢰고。근거토서생물배경특성，설계료협지륜、대륜、협지대、장긴장치화도향장치등주요결구，병대각결구진행료분석，학정료주요결구삼수。근거목서괴근발기시적속도분해도，건립료괴근발기시적역학모형，차통과분석추도득도료협지수송궤구대괴근적발기력화대경간적협지력계산공식。해연구대우쾌속발출、수송서괴、감소서괴손실、강저상서솔、제고알발식목서수획궤정궤성능구유중요의의。
Aiming at the existing problems of dropping off during clamping,dropping off of cassava,difficulty to clamp in the middle point,difficulty to feed cassava stem to clamping-conveying mechanism of digging-pulling cassava harvest,a kind of clamping-conveying mechanism is designed.Tension-spring is installed inside a shift rod groove.The cassava stem is clamped tightly between wheels being installed the shifting rod and frame.The shifting rod can shift on the frame by shifting pair.Compare with the revolving pair between the rocker and frame,the shifting pair make the power of ten-sion-spring turn to clamping-power fully,no any loss,get maximum clamping force.At the same time the spacing of two belts can be adjusted automatically,and the cassava stem may be clamped firmly.According to the biological and environ-mental characteristics of cassava,main structure such as clamping-wheel,belt-wheel,clamping-belt,tensile mechanism and guiding mechanism are designed.Each structure are analyzed, and some main structure parameters are determined. According to the speed decomposing diagram of pulling cassava roots,the mechanism model is established,and the calcu-lation formula of pulling force to root and clamping force to stem were got.This research has great significance of high-speed pulling root and conveying stem,decreasing roots loss,reducing the injury rate of cassava,improving performance of digging-pulling cassava harvester.