An open-pit coal mine coal mining device

Abstract

The invention discloses a coal excavation device for an open pit coal mine. The coal excavation device comprises a rotating wheel. A mounting hole is formed in the center of the rotating wheel. A mounting disc is arranged on the outer wall of the rotating wheel in a sleeving mode. A spline is arranged on the outer wall of the rotating wheel. A corresponding spline groove is formed in the inner wall of the mounting disc. The spline and the spline groove are matched mutually. First sliding grooves are evenly formed in the side wall of the mounting disc in the circumferential direction of the mounting disc. A second sliding groove is formed between every two first sliding grooves. Openings of the first sliding grooves are formed leftwards, and openings of the second sliding grooves are formedrightwards. The first sliding grooves and the second sliding grooves are both used for getting through the side wall of the mounting disc. According to the coal excavation device, the original mode that cutter teeth are directly and fixedly connected to the mounting disc is changed, the mode of connection between the cutter teeth is adopted, the cutter teeth bear most of cutting force, thus the mounting disc is effectively protected, the service life of the mounting disc is prolonged, meanwhile, the cutter teeth are convenient to dismount and replace, and the maintenance cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of coal mining and digging devices, in particular to a coal mining and digging device for an open-pit coal mine. Background technique [0002] When the ore seam is close to the surface, it is more economical to use surface mining. The soil above the deposit is called topsoil. Explosives are laid in the undeveloped topsoil, and the topsoil is then removed using equipment such as dredges, backhoes, and trucks. This topsoil is filled into previously mined pits. After the topsoil is removed, the ore seam is exposed; at this point the ore blocks are drilled or blasted and the ore is trucked to a coal preparation plant for further processing. When the ore is mined, repeat the same steps next door. However, the cutter teeth of the existing shearer are directly fixed on the mounting plate, and the cutter teeth are easily damaged. Repeated replacement of the cutter teeth will damage the mounting plate. The large...

AI Technical Summary

Problems solved by technology

However, the cutter teeth of the existing shearer are directly fixed on the mounting plate, and the cutter teeth are easily damaged. Repeated replacement of the cutter teeth will damage the mounting plate. The large cutting force deforms the mounting plate. Since the cost of the mounting plate is much higher than that of the cutter teeth, the damage of the mounting plate directly affects the use of the device and greatly increases the maintenance cost of the device.

Images