Abstract: Through the comprehensive considerations of the use conditions and maintenance level, This article analyzes the support structure of ranging arm planetary mechanism of the traditional use and the current use, and proposes the new support structure of ranging arm planetary mechanism of thin coal seam shearer. this article discusses the key technology points of the new support structure of ranging arm planetary mechanism of thin coal seam shearer,and provides the technical basis of the new support structure of planetary mechanism, in order to achieve better use and promotion

Key words: thin coal seam shearer, ranging arm, planetary mechanism, support structure