Rolling friction or suspension friction impact excavating method and antiabrasion impact excavator for implementing the same

Abstract

The invention relates to a rolling friction or suspension friction impact excavating method and an antiabrasion impact excavator for implementing the same. The antiabrasion impact excavator includes a reciprocating impact part, which consists of an impact drive device, a rolling reciprocating device and an impact head. The rolling reciprocating device comprises a friction body, a friction body support, an impact guide element and a limit structure. The friction body is arranged between the friction body support and the impact guide element and is disposed at the limit structure to form a rolling guide. The impact drive device is equipped with an anti-breakoff mechanism. The excavator is also provided with a rotary power buffering device and a structure buffering device, so that the impact head can make rolling friction or suspension friction reciprocating motion under support of the impact guide element, the damage caused by an anti-breakoff force to a power drive device and a rolling path guiding device can be prevented, and the influence of a reciprocating impact part's impact shock on the excavator body and other parts can be avoided. Therefore, stability of the whole excavator can be improved, and the service life can be prolonged.

Description

technical field [0001] The invention belongs to the field of machinery, and is particularly suitable for a rolling friction or suspension friction impact mining method in the mining field and an anti-wear impact mining machine implementing the method. Background technique [0002] Roadheaders and shearers are mainly used in the excavation of bridges, culverts and tunnels of railways and highways, as well as mechanized mining of mineral materials. The existing widely used mining equipment is mostly drilling-milling cutting-type roadheaders and rolling-milling shearers. The principle is to drill and mill or roll mill the coal seam or rock formation through the pick teeth arranged on the outer surface of the front part of the cutting head. Since the cutting head produces a large rotational force during drilling and milling or rolling milling, it will have a greater impact on the rotating shaft. Large twisting force will cause serious damage to the rotating shaft and reduce the ...

AI Technical Summary

Problems solved by technology

The power part adopts a hydraulic cylinder, in which there is sliding friction between the piston and the cylinder body, and the frictional resistance is large, which causes severe wear of the sealing plug and increases the gap between the piston and the cylinder body, thereby increasing the leakage, and at the same time Increased energy consumption affects the performance of the equipment; in this invention, a hydraulic cylinder is used to drive the working parts to impact, and the impact frequency is low and the speed is slow, so it cannot achieve the effect of using a mechanical transmission mechanism, such as a crank mechanism with high frequency impact; its working parts Installed at the end of the hydraulic cylinder, when the hydraulic cylinder drives the working parts to extend or retract along its axial direction, there are still problems such as swaying or swaying of the working parts, which affects the impact effect; since the hydraulic cylinder rod has no auxiliary guide device, it is powerful during mining. The impact reaction force makes the working parts seriously separate from the hydraulic cylinder, so that the sliding friction is concentrated on the local wear of the hydraulic cylinder, causing serious damage to the hydraulic cylinder and making the equipment unable to operate normally

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