| 摘要 |
FIELD: mining industry, particularly, machines for blasthole drilling, mainly, in development workings rectangular and trapezoidal in cross- section. SUBSTANCE: blasthole machine has drilling unit provided with ram for vertical bracing and vertical bracing device, both interconnected by connecting unit. The latter is made in form of folding lever mechanism. Lever mechanism has hinges for turning in horizontal and vertical planes and limiters of mutual motion in vertical plane of drilling unit and device for vertical bracing for provision of gap between mine working floor during their alternating reinstallation. EFFECT: simplified design, reduced weight, maneuverability and improved operating conditions in underground workings. 4 dwg
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