On January 28, 2022, a semi-trailer with a rear folding dump truck in the middle compartment
The present invention relates to a self loading and unloading device for a container flatbed semi-trailer, characterized in that: a fixed subframe and a docked flip subframe are installed on the semi-trailer chassis connected to the tractor, the fixed subframe is fixed on the front half of the semi-trailer chassis, the flip subframe is hinged at the rear of the semi-trailer chassis, and several rollers supporting the container pallet are installed on both outer sides of the front fixed subframe and the rear flip subframe. Two parallel telescopic oil cylinders are installed inside the fixed subframe, with two movable pulleys installed on the piston ends of the two telescopic oil cylinders. Guiding grooves for the movable pulleys are installed on the inner sides of the fixed subframe. Two fixed pulleys are installed at the front and rear ends of the fixed subframe, and a traction fixed pulley is installed vertically at the front end of the fixed subframe. The front and rear ends of the flip subframe and the semi-trailer chassis are vertically installed with fixed pulleys corresponding to the traction fixed pulleys. Not only does it reduce the weight of the flip subframe, but it also greatly lowers the height of the flip subframe during flipping, improving its stability; In addition, the reduction in the height of the subframe flip also reduces the tilt angle during container loading and unloading
