QUARRY EXCAVATOR BUCKET TOOTH ASSEMBLY Russian patent published in 2019 - IPC E02F9/28 E21C35/19 

FIELD: excavating equipment.

SUBSTANCE: invention relates to the excavating equipment. Quarry excavator bucket tooth with the wedge-shaped working part, massive transitional part and the tail part with a socket, open from back and covering the bucket front wall seating surfaces, is made solid cast with ribs on the working part front and rear faces. Working part is formed by a convex upper and concave lower curvilinear faces formed by mating cylindrical surfaces, and has a rounded cutting edge offset downwards relative to the tooth longitudinal axis, and the tail section socket is formed by the upper and lower walls, also provided with stiffeners from above and below. Tooth working and transitional parts width is for 20–80 mm more, than the tail part width, the cylindrical surface radius forming the working part lower edge for the teeth with a length of 1450–1500 mm is equal to R₁ = 1150–1250 mm, and the cylindrical surfaces radii, forming the front face and ribs thereon, are taken in the proportion R₂ = (1.6–2.0) ⋅ R₁. Ribs on the working part back face are made taller than on the front face. In the tooth transitional part symmetrically to the longitudinal axis, stepped in width inner cavity is made; in longitudinal section its shape corresponds to the shape of this part outer surface.

EFFECT: technical result is increased durability and service life, reducing the sudden failures likelihood.

1 cl, 8 dwg