Rolling friction or suspension friction impact mining method and wear-resistant impact mining machine using said method

Abstract

A rolling friction or suspension friction impact mining method and a wear-resistant impact mining machine using said method. The mining machine comprises a reciprocating impact part (3). The reciprocating impact part comprises an impact drive device (4), a rolling reciprocating device, and an impact head (6). The rolling reciprocating device comprises a rubbing body (38), a rubbing body support (39), an impact guiding element (5.1), and a position-limiting mechanism. The rubbing body (5.3) are disposed between the robbing body support (39) and the impact guiding element (5.1), and inside of the position-limiting mechanism to form rolling guiding. The impact drive device is disposed with a damage-prevention mechanism, a rotary power buffer device, and a structural buffer device, such that the impact head reciprocatingly move and have rolling or suspending friction under the support of the impact guiding element, thereby preventing the damage-prevention force to damage a power drive device and a rolling channel guiding device, and preventing the impact vibration caused by the reciprocating impact part to affect the machine body and other parts. The overall stability is therefore enhanced, and the service life is extended.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The present invention belongs to the mechanical field, and is especially applicable to a rolling friction or suspension friction impact mining method in the mining field and a wear-resistant impact mining machine using said method.BACKGROUND OF THE INVENTION[0002]Tunneling machines and coal mining machines are mainly applied to excavation of railways, bridges and culverts of roads and tunnels and mechanical mining of ore materials. Most mining machines broadly applied at present are drilling and milling cutting-type tunneling machines and rolling milling cutting-type mining machines and the working principle is to drill and cut or mill and cut in a rolling manner a coalbed or a rockbed through picks arranged on the outer surface at a front part of a cutting head. Since a relatively large rotating damage force is generated by the cutting head during drilling and milling or rolling milling and cutting, a relatively large twisting force will be gen...

AI Technical Summary

Benefits of technology

The patent is for a wear-resistant efficient impact mining machine with high structural strength and space utilization. It has a multi-point support impact head structure that supports the impact head through multiple points to centralize the impact direction, strengthening centralization and controlling the impact direction, preventing damage to the impact drive device and extending its service life. The impact guiding element is supported by the rubbing body to reciprocate with rolling friction or suspension friction, changing the original sliding friction structure and reducing running resistance, improving the impact mining machine's performance, efficiency, and service life.

Problems solved by technology

Since a relatively large rotating damage force is generated by the cutting head during drilling and milling or rolling milling and cutting, a relatively large twisting force will be generated to a rotating shaft, thus causing heavy damage to the rotating shaft and shortening the equipment service life.

The crushing efficiency of a drilling milling or milling cutting mining method is relatively high with extremely high energy consumption, and low production efficiency and lumpiness especially when tunneling crushing and ore material mining are performed at a pressure stress.

During the mining process, a large amount of dust will be further generated, which results in a poor mining environment and potential risks.

When a material is impacted and fallen, since the cutting head of the mining machine is heavy in weight and large in volume, a head handle of the cutting head is seriously damaged from an impact guiding mechanism, thus leading to damage on a drive system and a machine body, massive maintenance of the whole machine and a short service life.

However, if the cutting head is narrow and small, the production efficiency will be largely reduced.

There is sliding friction between a piston in the hydraulic cylinder and the cylinder body with large friction resistance, thus causing serious wear to a sealing plug and increasing a gap between the piston and the cylinder body to increasing leakage while increasing energy consumption and affecting the operational performance of the equipment.

When the hydraulic cylinder drives the working component to extend out or retract along an axial direction of the hydraulic cylinder, problems including swinging and oscillation etc. of the working component are further caused to affect the impact effect.

Since a hydraulic cylinder rod is not provided with an auxiliary guiding device, the working component is seriously damaged from the hydraulic cylinder by a powerful impact reactive force generated during mining.

Thus, a sliding frictional force is focused on the hydraulic cylinder to cause partial wear, which results in heavy damage on the hydraulic cylinder and affects normal operation of the equipment.

Images