一种四速电钻的变速箱设计

摘要

介绍一种电钻用4速变速箱，说明了逆止器工作原理、换挡方式、各级变速的方法、传动比的计算和该种变速箱的优势。%This paper introduces a drill gearbox with 4-speed and illustrates backstop principle, shift way, method of variable speed, calculation of transmission ratio and the advantages of the gearbox.