The analysis of structure and principle of operating of cardan shafts between transmission boxes and starting generators of Beijing locomotives reveals the main reasons of scrapping of cardan shafts.

• 通过分析北京型机车传动箱和起动发电机之间的万向轴的结构及在机车运用中的动作原理,确认造成万向轴报废的主要原因,结合实际调查,阐明修复工艺及修复效果。