09-07-2015 дата публикации
Номер: KR101534219B1
Принадлежит:
JUNG, UN SUB
The present invention relates to a rock crushing apparatus using a hinge expansion method. The rock crushing apparatus using a hinge expansion method is installed in an insertion hole formed in rock to expand the insertion hole to crush the rock, and comprises: a cylinder mounted on a front end of a movable operation device and provided with a rod which protrudes therefrom and moves forward and backward according to a movement of a piston disposed therein; a hollow shaft inserted into the insertion hole, whose one end is fixed on an end of the cylinder, and in which the rod is disposed; a core bar whose one end is connected to an end of the rod and provided with an inclined surface whose outer diameter becomes smaller towards the other end thereof; and an expansion block disposed on an end of the hollow shaft, whose one side is fixed by a hinge, and whose the other side contacts the inclined surface when the core bar moves forward from an outer diameter smaller than an outer diameter of ...
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