5Jose Ignacio Amasorrain, Xabier Sagartzazu. Load distribu- tion in a four contact-point slewing bearing [ J ]. Mechanism and Machine Theory,2003, (38) :479 - 496.
6Gao X H, Huang X D, Wang H. Modelling of ball-raceway contacts in a slewing bearing with non-linear springs [ J ]. Proceedings of the Institution of Mechanical Engineers Part, 2011 (225) :827 - 831.
7Liu Hongbin, Li Jishun, Xue Yujun. Study on load distribu- tion calculating method of slewing bearing with the link ele- ments [ J ]. Advanced Science Letters, 2011 (4) : 8 - 10.