Novel steering knuckle supporting shaft

The utility model relates to the technical field of steering knuckle supporting shafts, in particular to a novel steering knuckle supporting shaft which comprises an installation pipe shaft piece, a steering shaft piece is installed in the installation pipe shaft piece, a circular pipe piece is detachably connected to the installation pipe shaft piece, the circular pipe piece corresponds to the steering shaft piece, and the steering shaft piece is installed on the installation pipe shaft piece. A first connecting hole piece is formed in the middle of the upper end of the round pipe piece, a first oil filling hole piece is formed in the upper end of the round pipe piece and located on one side of the first connecting hole piece, and a sleeve piece is arranged on the round pipe piece in a penetrating mode. Lubricating oil can completely enter the mounting pipe shaft part conveniently through the correspondence of the second oil filling hole part and the first oil filling hole part, the steering shaft part can b