Design and physical model experiment of an attitude adjustment device for a crawler tractor in hilly and mountainous regions  

作　　者：Jingbin Sun Chong Meng Yazhou Zhang Guoping Chu Yanjie Zhang Fuzeng Yang Zhijie Liu 

机构地区：[1]College of Mechanical and Electronic Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China [2]Scientific Observing and Experimental Station of Agricultural Equipment for the Northern China Ministry of Agriculture,PR China,Yangling,Shaanxi 712100,China [3]State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau,Yangling,Shaanxi 712100,China

出　　处：《Information Processing in Agriculture》2020年第3期466-478,共13页农业信息处理（英文）

基　　金：This research was conducted at the College of Mechanical and Electronic Engineering,Northwest A&F University and was supported by the National Key Research and Development Plan Program(2016YFD0700503).

摘　　要：To address the problems of difficult leveling and poor stability of hill crawler tractors,an attitude adjustment device based on a parallel four-bar mechanism was designed,and the mechanical reasons for the sideslip instability of hill crawler tractors were analyzed.On this basis,a posture adjustment mechanism based on a parallel four-bar mechanism was proposed,and the structure of the complete attitude adjustment device was designed.To ensure that this device meets the strength requirements during operation,a mechanical analysis of the key components(active rocker and slave rocker)was carried out to accommodate the load during leveling.Based on ANSYS software,a finite element simulation analysis was used to determine the maximum stress position of the active and slave rockers.Finally,to verify the accuracy of the above simulation analysis results and determine the influence rules of the lateral slope angle,longitudinal slope angle and loading quality on the abovementioned maximum stress,a physical model test bench of the attitude adjustment device was built.An orthogonal regression experiment was carried out with the maximum stresses of the active and slave rockers as the test indices.The experimental data were analyzed by Design-Expert 10 software,and the results show that the order of the primary and secondary factors influencing the maximum stress of the active rocker was the loading mass,lateral slope angle and longitudinal slope angle.The order of the factors influencing the maximum stress of the slave rocker was the longitudinal slope angle,lateral slope angle and loading mass.The active and slave rockers meet the strength requirements.This work provides technical support for the production of hill crawler tractor physical prototypes.

关 键 词：Hill crawler tractor Attitude adjustment Mechanical analysis Physical model experiment 

分 类 号：S22[农业科学—农业机械化工程]