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 type slewing device of a coal mining tunneling machine, which belongs to the technical field of design and manufacture of parts of coal mining equipment in underground coal mines. Background technique [0002] The cantilever coal mining roadheader is one of the most commonly used mining equipment in large and medium-sized coal mines. Because it operates in the harsh environment of coal mines, its cutting mechanism, slewing mechanism, walking mechanism, and loading mechanism are all designed with explosion-proof design. [0003] The slewing mechanism is the basic device for the reciprocating operation of the cantilever mining cutting head and the mining operation. It plays the role of linking up and down. The slewing mechanism will directly affect the rotation angle and mining area of ​​the coal mining operation. [0004] At present, most of the slewing devices of cantilever roadheaders use push-pull cylinders and s...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the shortcomings of the background technology, to improve the structure of the rotary mechanism of the coal mining roadheader, and to adopt ultra-high molecular weight polyethylene plane support, built-in hydraulic oil cylinder, and rack-and-pinion large-angle rotation to overcome the weak bearing capacity, The shortcomings of large slewing torque and poor stability can greatly improve the impact resistance, shock resistance, load bearing and slewing traction steering ability of the slewing mechanism of the roadheader

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