Four-link door seat machine

タイトルまたは説明

The bridge is a type of crane supported on the ground track or foundation by the legs on both sides. It runs along the ground track and can pass railway vehicles or other ground vehicles below.
A type of boom crane with a rotatable lifting device (referred to as the rotating part) installed on a portal frame. The four legs of the portal frame form four "doorways" for railway vehicles and other vehicles to pass through. Most portal cranes run along the crane track on the ground or on buildings to carry out lifting and loading and unloading operations. A semi-portal crane is a crane with one side of its running track set on the ground and the other side set on a building above the ground.
Structural composition:
The portal crane has lifting, slewing, luffing and running mechanisms. The first three mechanisms are installed on the rotating part and participate in the operation in each cycle. The rotating part is also equipped with a tilting single arm or combined arm and a driver's cab that can pitch. The operating mechanism is installed at the bottom of the portal seat to adjust the working position of the crane. The portal crane with bucket is also equipped with additional equipment such as telescopic funnel and belt conveyor to improve the productivity of the portal crane when loading and unloading bulk materials with grab bucket. In addition to the electrical protection device, it is also equipped with safety devices such as lifting weight or lifting torque limiter and crane rail clamp.