Expansion bar

• Main Author: LIU HAIHUI
• Format: Patent
• Language: Chinese; English
• Published: 08.09.2017
• 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 utility model relates to an expansion bar, including outer tube, the interior body of rod, locking Assembly and expansion driving piece. The body of rod was outside including outer tube slidable ground cover was established. The locking Assembly cover is established inside the outer tube, and locking Assembly includes base and two above clamping pieces that link to each other with the base. The base is equipped with the screw hole. The clamping piece has elasticity, and the clamping piece is the annular and arranges the one end at the base. The expansion driving piece include with the screw rod of the corresponding setting of screw hole, and the expansion section that links to each other with the screw rod. The screw rod is installed in the screw hole. The external diameter of expanding the section is crescent on keeping away from the direction of screw rod, and the expansion section sets up between the clamping piece, just contradicts with the clamping piece, and the expansion section links to each other