Crane Boom Raising Assist Structure for Stability

A stabilizing member (outrigger) is introduced as an intermediary element between the crane carbody and the ground. This stabilizing member extends forward from the carbody and contacts the ground at a point forward of the front fulcrum, creating an additional support point that prevents the crane from tipping forward when raising long, heavy booms. The stabilizing member acts as a mediator that transfers the stabilizing function from the ground contact point to a more forward position, thereby increasing the crane's ability to handle longer booms without compromising stability.

The stabilizing member is deployed in advance before the boom raising operation begins. By establishing the additional ground contact point beforehand, the crane creates a more favorable stability condition that allows it to safely handle heavier booms that would otherwise exceed structural capability limits. The preliminary deployment of the stabilizing member prepares the crane system to accommodate greater boom weights without overloading critical structural components.

The stabilizing function is extracted from the external assist crane system and integrated directly into the crane itself through the stabilizing member. Instead of requiring a separate assist crane to provide the additional support, the crane incorporates its own stabilizing member that extends forward and contacts the ground. This extraction eliminates the need for external assistance and reduces operational complexity while maintaining the ability to raise long, heavy booms.

The stabilizing member provides a dynamic solution that adapts to different operational requirements. During setup operations with long booms, the stabilizing member is deployed to create additional forward support, enabling easy raising of the boom. When not needed, the stabilizing member can be retracted or positioned differently. This dynamic adjustment allows the crane to easily raise long booms during setup while maintaining its maximum load capacity design, resolving the contradiction between design capacity and setup ease.