| 摘要 |
PURPOSE: A rock splitting power jack is provided to simplify a joint structure of a hydraulic pipe and to improve durability of a rubber tube. CONSTITUTION: A rock splitting power jack comprises two thrust members(1) placed toward a groove of a V-shaped section, a rubber tube(3) placed to a hollow part forming the groove axially, two wedges placed on both sides of the rubber tube(3), a hole part(4B) for interposing one end of the rubber tube(3), a joint pipe(4) with a connector(4A) of a hydraulic pipe connected to the hole part(4B), a flange(8) formed on the outer circumference of the joint pipe(4), a disk-shaped pressure plate(7) fitted to the outer circumference of a rubber tube(3), a conic concave part(8A) formed on the flange(8) toward the pressure plate(7), a ring member(9) attached to the outer circumference of the rubber tube(3) and fitted between the concave part(8A) and the pressure plate(7), and a guide groove(1B) formed on the thrust member(1) to guide the thrust member(1) toward the crossing direction of a shaft when the rubber tube(3) expands by fitting to the flange(8) and the pressure plate(7).
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