Rocker arm structure of short-body coal mining machine with wide mining range

Abstract

The invention relates to a rocker arm structure of a short-body coal mining machine with a wide mining range. A transmission input interface structure and a transmission output interface structure are respectively arranged at the free end of a left-right extension section and the free end of a front-back extension section of an L-shaped transmission box body of an arm frame shell; a front support arm and a back support arm which extend left and right are respectively arranged in front of and behind the left-right extension section of the transmission box body; the front support arm and the back support arm are both cantilever structures of which one ends are connected to the transmission box body; a front hinge interface structure and a back hinge interface structure are respectively arranged on the front support arm and the back support arm; and the hinge axis of the front hinge interface structure, the hinge axis of the back hinge interface structure and the rotation axis of the transmission input interface structure are overlapped, and extend in the front-back direction like the rotation axis of the transmission output interface structure. The rocker arm structure is more reliably connected with a fixed reduction gearbox, is lower in lower mining limit and higher in upper mining limit, and is suitable for mining thin or extremely thin coal seams.

Description

technical field [0001] The invention relates to a rocker arm of a shearer, especially suitable for a shearer with a short fuselage. After the application, the mining range of the corresponding shearer can be increased, and it can be adapted to the coal and rock working face with more complex geological conditions. Mining of thin coal seams and extremely thin coal seams. Background technique [0002] Early hydraulic shearers (such as MG300-W) used a fixed reduction box with cutting power and a rocker arm without cutting power to obtain a complete cutting function. Swing the rocker arm. The shearer with this structure can adapt to the coal seam with a relatively thin mining limit, but the force of the root of the rocker arm connecting the cylinder with this structure is usually large, which is prone to problems such as fracture, and this structure generally adopts a longer The connection of the support arm of the oil cylinder is not suitable for the mining of the mining heig...

AI Technical Summary

Problems solved by technology

The shearer with this structure can adapt to the coal seam with a relatively thin mining limit, but the force of the root of the rocker arm connecting the cylinder with this structure is usually large, which is prone to problems such as fracture. At the same time, this structure generally adopts a longer The connection of the support arm of the oil cylinder is not suitable for the mining height below the thin coal seam. At present, this structure has basically been eliminated.

[0003] In the existing improved connection structure that can adapt to thinner coal seams, since the force point of the drum is on the side of the force point of the jib support, which is a cantilever structure, the greater force on the drum will affect the reliable connection of the force point of the jib support sex

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