Hydraulic rolling combined guide rail unloading device

The invention relates to the technical field of large-sized machine tools, in particular to a hydraulic rolling combined guide rail unloading device, which comprises an upright post horizontal guide rail and a tool body vertical guide rail. The device is characterized in that spring clamping positioning units are arranged on the two sides of the upright post horizontal guide rail and the tool body vertical guide rail respectively; guide rail plates are fixedly arranged on horizontal planes at the two ends of the upright post horizontal guide rail respectively; at least three expansion link penetration holes are formed in the two sides of the horizontal planes of the upright post horizontal guide rail respectively; an unloading oil cylinder corresponding to the expansion link penetration holes is arranged on an upright post bottom surface; expansion links of the unloading oil cylinder penetrate through the upper ends of the expansion link penetration holes to be connected with rolling guide rail blocks; the upper part of the tool body vertical guide rail forms rolling contact with the rolling guide rail blocks; and an adjustable rolling guide rail block is arranged on an upright post on the lateral surface of the tool body vertical guide rail, and forms rolling contact with the lateral surface of the tool body vertical guide rail. The device has the advantages of novel structure, stable unloading, high machine tool accuracy, convenience for detection and the like.