Abstract: A test bench to evaluate the operation of a brake or shock absorber for bucket doors of excavators or electric shovels that allows simulating real operating conditions of the bucket doors, which includes a brake support that allows installing and fixing the brake to be evaluated, said brake comprising, a body with an axis that is connected to the end of an arm in a pivotal manner and its other end is used for connection with the bucket door; a pendulum to simulate the loads received by the brake due to the opening and/or closing movement of the bucket door, comprising a pendulum arm comprising an upper end with a lateral edge comprising at least one opening to be fixedly connected to the free end of the brake arm, an inner side pivotally connected to a pendulum support, arranged in front of the brake support, allowing rotational movement of the pendulum, and an outer side comprising a plurality of openings defining a predefined inclination; and a lower end comprising a known mass; a locking device on one side

Abstract: Modeling process and structural repair of a railway or metal car to assemble a hopper with a self-supporting body different from the original hopper that is formed from steel plates on the structure of the car.

Abstract: A snubber for an excavator bucket door that permanently controls deformation due to the effect of working pressures during operation, improving braking performance.

Abstract: A cover made of an elastomer material to act as protection for a steel hopper of very heavy-duty trucks and train cars. The cover protects the metallic hopper or cars from shocks from boulders and material of varied granulometry, in addition to providing protection against abrasion, unloading and corrosion. Fastening elements prevent the cover from loosing as a result of the dragging generated by the unloading of materials from the hopper. The protection provided by the cover increases equipment availability and decreases stopping time during repairs.

Abstract: A cover made of an elastomer material to act as protection for a steel hopper of very heavy-duty trucks and train cars. The cover protects the metallic hopper or cars from shocks from boulders and material of varied granulometry, in addition to providing protection against abrasion, unloading and corrosion. Fastening elements prevent the cover from loosing as a result of the dragging generated by the unloading of materials from the hopper. The protection provided by the cover increases equipment availability and decreases stopping time during repairs.