Swing mechanism comprises an axial piston motor with cushion valve and a planetary gcear reducer.Fully sealed singlerow ball swing ring with monobloc internal teeth,grease bathed.

• 带有缓冲阀的轴向柱塞马达与行星齿轮减速机组成的回转机构，单列球型整体内齿式全密封回转支承，油脂润滑。