Quick-detachable pin shaft structure for connecting guide holder with pedestal of large-size drilling machine

• Main Authors: ZHANG LIANGFU, WU YUE, ZHOU YUEYANG, ZHANG JIAN
• Format: Patent
• Language: Chinese; English
• Published: 01.06.2016
• Subjects: BLASTING; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

The invention relates to a quick-detachable pin shaft structure for connecting a guide holder with a pedestal of a large-size drilling machine. The quick-detachable pin shaft structure comprises a base, a screw shaft and a male seat connected with the guide holder. The male seat is located inside the base. The screw shaft transversely penetrates through an inner hole of the base and an inner hole of the male seat. A female connector shaft sleeve is installed in the inner hole of the base and located on the two sides of the male seat. A male connector shaft sleeve is installed in the inner hole of the male seat. Threads in the different directions are arranged in outer circle faces of the two ends of the screw shaft, and nut shaft sleeves with the outer sides being tightly attached to the female connector shaft sleeve and the male connector shaft sleeve are symmetrically connected to the outer circle faces of the two ends of the screw shaft through the threads. The outer side wall of each nut shaft sleeve is i