Kinematic Characteristics Analysis and Parametric Solving of Snow Melting Agent Throwing Mechanism with Variable Crank Length  

作　　者：Wenwu Liu Nianli Lu Hongxin Liu 

机构地区：[1]Engineering College,Northeast Agriculture University,Harbin 150030,China [2]School of Electro-Mechanical Engineering,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2021年第4期60-66,共7页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the Young Talents Project of Northeast Agriculture Scholars Program(Grant No.54971412);the National Key R&D Program of China(Grant No.2017YFD0700105-2).

摘　　要：Variable crank length cam⁃linkage mechanism has attracted much attention due to its compact overall structure when realizing complex motion laws.According to the special trajectory requirements,the kinematic characteristics and parameters of the mechanism have been analyzed and solved,which lays foundation for the implementation of the variable crank length snow melting agent throwing mechanism designed in this paper.Based on the trajectory equation of the point,the mathematical model of the throwing mechanism was established,and the theoretical trajectory of the end point of the throwing mechanism was obtained by programming.The parametric modeling and trajectory drawing were carried out by computer aided three⁃dimensional interactive application(CATIA),and the correctness of the mathematical model was verified by comparison.The regional trajectory distribution characteristics of the end points of the throwing mechanism were studied by using the trajectory region location method,and the influence of various parameters on the trajectory was investigated by using the numerical cycle comparison method.The human⁃computer interaction system of snow melting agent throwing mechanism with variable crank length was constructed by using Microsoft Visual Basic(VB)software.Based on the restriction conditions,the optimum combination of structural adjustment parameters and operational parameters suitable for Harbin first⁃class roads was obtained by using orthogonal test table,which provides an effective method to solve the parameters of the variable crank length cam mechanism with smooth impulse trajectory.

关 键 词：throwing mechanism variable crank length cam mechanism mathematical model kinematic characteristics parametric solving 

分 类 号：TH132.2[机械工程—机械制造及自动化]