In order to realize the teaching purpose of the basic mechanical design,stimulate students'interest in learning,reduce the difficulty of learning,and innovative teaching methods,so as to solve the problem effectively of determining the axial force direction of worm,based on the force analysis of worm drive,the tangential force direction of worm is determined,judging from the determining of gear tangential force direction,combined with the simulation of worm rotation based on SolidWorks Motion,according to the analysis of worm teeth motion time sequence,the feeling motion direction of gear is determined,it is concluded that the axial force direction of worm is opposite to the axial component of its feeling motion direction,finally,a method to determine the direction of worm axial force based on feeling motion is proposed,and it is verified by a comparative example based on"left and right hand rule".The method was applied to the teaching of Industrial Design specialty in 2017 and Automotive Service Engineering specialty in 2020,the average score of the students remained basically unchanged relative to 2016 grade,the excellent rate increased,and the failed students'number decreased,the average score of gear force analysis have been improved,the course practice has played a good teaching effect,the research provides a reference for the innovation of teaching methods of basis mechanical design course.
关键词
机械设计基础/蜗杆传动/受力分析/运动分析/Solidworks/Motion/感觉运动
Key words
fundamentals of mechanical design/worm drive/force analysis/motion analysis/SolidWorks Motion/feeling motion
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