| 摘要 |
A rock-splitting apparatus consists of a cylindrical block, in which a hydraulically actuatable piston is disposed to move in a longitudinal direction. The piston acts by way of a slider wedge which is connected to the rod of the piston on presser cheeks which can be inserted into drill holes and which have an obliquity which is complementary to that of the slider wedge, in which the presser cheeks are suspended from transverse pins by way of heads of these cheeks, so as to be axially fixed in position and capable of restricted lateral movement. That movement corresponds to the variation in width of the axially movable slider wedge; the piston rod is sealingly guided by a guide sleeve which is connected in an oil-tight manner with a casing.
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