Feed hopper

A feed hopper for a material processing machine with multiple hopper walls, each of which is movably mounted in a working position, in which the hopper walls are arranged to enable the receiving and feeding of material to be processed, and a transport position, in which the hopper walls are arranged on the material processing machine in a compact, folded-away manner for transport,

• wherein each of the hopper walls is assigned at least one hopper wall adjusting device,
• wherein the at least one hopper wall adjusting device has at least one frame, a drive device movably mounted on the at least one frame, and a lever system designed to move the associated hopper wall, which lever system is movably mounted on the at least one frame in a self-locking position and a folding position,
• wherein the drive device is connected to the lever system in a movement-coupled manner and the drive device is designed to move the lever system into the self-locking position and/or into the folding position, and
• wherein in the working position of the hopper wall, the lever system is arranged in the self-locking position and the lever system is designed to hold the hopper wall in the working position in a self-locking manner.