This frog legs legs legs of activity in the fixed leg of the hinge, which launched the action is completed by a hydraulic cylinder, is characterized by simple structure, light weight, but little leg span is only applicable to small tonnage cranes .
H-leg of this leg is not commonly used in hydraulic lifts, there are two hydraulic cylinders. Legs stretched out after the event, the vertical leg stays at work, shaped like H named. Is characterized by a large outrigger span, better adaptability for the venue, has been widely adopted.
When the X-type legs that leg work, leg was X-type, space heavy activity larger than the H-type legs, so often, and H-type outriggers mixed use, before the formation of H, after X of the type.
Radiant legs to the center of rotation of the turntable as the center of the bowl-shaped frame from the frame down radially outwardly four legs. Is characterized by good stability when lifting operation is mainly used in some of the large crane.
This swinging leg during the lifting operation the legs, the legs under the effect of the hydraulic cylinder and the frame can be swung to a position perpendicular to the longitudinal axis of the upper; non-operating state, the legs can not be too long, so that the lateral support interval small.