BUCKET OF MINE EXCAVATOR Russian patent published in 2017 - IPC E02F9/02 

FIELD: mining.

SUBSTANCE: method is performed by optimizing the design of the front wall and the teeth, using wear resistant materials, appying stable braking operation mechanisms and opening of the bucket bottom. This allows using the bucket for stripping operations on frozen and rocky soil, in faces with high-density and abrasive rock. This task is achieved by making the mine excavator bucket's rear, side, and front walls with the cutting edge and the bottom wall in the form of a wear-resistant cast steel slab with reinforcement ribs; closing and braking mechanisms of the bucket bottom. The cutting edge of the front wall has teeth, the bucket bottom closing mechanism is comprised of a bolt bar with guides and a lever system, the braking mechanism consists of discs with an adjustment spring. The cutting edge of the front wall of the bucket is arch-shaped with÷ a curve of 0.17-0.1 m^-1; reinforcing patches of wear-resistant steel are installed between the teeth in the form of a truncated pyramid with the base located on the inside surface of the front wall and the height equal to a quarter of the front wall's thickness. Side edges of the front wall are fitted with detachable U-shaped plates made of wear-resistant steel. The teeth are of the tetrahedral prism shape with congruent side faces; the outer face of the teeth is coplanar with the front wall and the inside face at the top of the teeth forms an angle 10≤15 with the symmetry axis of the front wall. The teeth are installed in the slots of the front wall and secured with pins. The rear wall is provided with two pairs of bracing rings made of wear-resistant steel located on its outer surface, and the bottom of the rear wall has lugs for mounting the axle fixing the bottom of the bucket. The detachable braking mechanism of the bucket bottom is installed on the outer side of the lugs, which turns on the levers and friction discs mounted on hollow shafts with adjusting springs, blown-out holes and adjusting nuts are installed at the ends of the axles. Rib stiffeners on the bottom of the bucket are placed symmetrically from the ends of the bolt to side edges of the bottom, at an angle of 60°÷90°, rib stiffeners on the hole in the bolt contain a lever which is fixed yet movable on one side, and limited by the stop block on the other. Plates between the teeth of the front wall are removable. This invention can contribute to manufactufing of a reliable and highly durable mine excavator. Reinforcement of the bucket structure in areas most prone to abrasive wear and shock, as well as the design of the teeth, the use of the proposed detachable protection and opening and braking mechanisms of the bottoms allow to reduce the time and simplify repairs and replacement of units and parts, which will ultimately increase service life of the bucket.

EFFECT: reliable, highly durable bucket of a mine excavator.

2 cl, 5 dwg