Crusher for mineral materials or recycled materials

A crusher for mineral materials or recycled materials, comprising:

• a crusher unit including a first crusher body and a second crusher body, wherein a crushing gap is formed between the first crusher body and the second crusher body;
• a hydraulic cylinder including a cylinder and a piston guided in the cylinder, the hydraulic cylinder including a pressure chamber delimited by the piston;
• an overload triggering device coupled to one of the first and second crusher bodies to permit an evasive motion of the one of the first and second crusher bodies increasing a width of the crushing gap, the overload triggering device including a movable assembly and a valve;
• and
• wherein the valve is formed between two components of the movable assembly that are movable relative to each other to define an open position establishing a fluid-conveying connection between the pressure chamber and a compensation area, and to define a closed position blocking the fluid-conveying connection, one of the two components forming the valve being the cylinder or the piston;
• wherein the movable assembly includes an inertia piston coupled to the piston or the cylinder of the hydraulic cylinder, wherein the inertia piston is one of the two components forming the valve, and wherein the inertia piston includes a sealing piece;
• wherein the piston of the hydraulic cylinder includes a valve seat;
• and
• wherein in the closed position of the valve the sealing piece is seated on the valve seat to block the fluid-conveying connection between the pressure chamber and the compensation area.

A crusher for mineral materials or recycled materials, comprising:

• a crusher unit including a first crusher body and a second crusher body, wherein a crushing gap is formed between the first crusher body and the second crusher body;
• a hydraulic cylinder including a cylinder and a piston guided in the cylinder, the hydraulic cylinder including a pressure chamber delimited by the piston;
• an overload triggering device coupled to one of the first and second crusher bodies to permit an evasive motion of the one of the first and second crusher bodies increasing a width of the crushing gap, the overload triggering device including a movable assembly and a valve;
• and
• wherein the valve is formed between two components of the movable assembly that are movable relative to each other to define an open position establishing a fluid-conveying connection between the pressure chamber and a compensation area, and to define a closed position blocking the fluid-conveying connection, one of the two components forming the valve being the cylinder or the piston;
• wherein the movable assembly includes an inertia piston movable relative to the piston of the hydraulic cylinder, a mounting bolt extending through the inertia piston and threadedly connected to the piston of the hydraulic cylinder, the mounting bolt having a longitudinal axis parallel to a longitudinal axis of the cylinder, a spring element received about the mounting bolt and configured to bias the inertia piston toward the piston of the hydraulic cylinder, the inertia piston being movable from the closed position of the valve to the open position of the valve while increasing a preload of the spring.