Rack-and-pinion type slewing equipment of coal-excavating development machine

Abstract

The invention relates to a rack-and-pinion rotator for a coal cutting development machine, mainly comprising a revolving body, a revolving gear, a left revolving rack, a right revolving rack, an upper support ring, a lower support ring, a built-in oil cylinder, a gear bearing and an articulated frame, wherein, large-scale high-power workpieces are adopted in the aspect of a structure; the plane support rings adopt ultrahigh molecular weight polyethylene materials; the revolving gear and the revolving rack adopt large-scale design; the modulus is 32; the pressure angle is 28 DEG; the gyration half angle is 26 DEG; the gyration integrated angle is 52 DEG; a high-power hydraulic built-in oil cylinder is adopted for power transmission. The rack-and-pinion rotator for the coal cutting development machine has the advantages of reasonable design, compact structure, large bearing capacity, and strong pressure-proof, shock-proof, shock-absorbing and impact resistant capacities; the impact resistance can rise two to three times compared with the prior art; the workpieces are difficult to damage; moreover, the rack-and-pinion rotator has long service life, is safe, stable and reliable, and is an extremely ideal rack-and-pinion rotator for the coal cutting development machine.

Description

technical field [0001] The invention relates to a rack-and-pinion rotary device of a coal mining roadheader, which belongs to the technical field of design and manufacture of underground coal mining equipment parts in coal mines. Background technique [0002] Cantilever coal mining roadheader is one of the most commonly used mining equipment in large and medium-sized coal mines. Because it works in the harsh environment of coal mines, its cutting mechanism, slewing mechanism, traveling mechanism and loading mechanism are all explosion-proof designed. [0003] The slewing mechanism is the basic device for the reciprocating operation of the cantilever mining cutting head and the coal mining operation. [0004] At present, most of the slewing devices of cantilever roadheaders are driven by push-pull cylinders and slewing bearings. Because in coal mining operations, the slewing mechanism bears the huge axial and radial loads and overturning moments of the cutting mechanism, the ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to improve the structure of the rotary mechanism of the coal mining roadheader in view of the deficiency of the background technology, adopting ultra-high molecular weight polyethylene plane support, built-in hydraulic Oil cylinder, rack and pinion type large-angle rotation, overcome the defects of weak bearing capacity, large rotation torque, and poor stability, so as to greatly improve the impact resistance, earthquake resistance, load bearing and rotation traction steering ability of the rotary mechanism of the roadheader

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