Locking screw part

• Main Authors: TOZAWA SHUNJI, OKAMURA YOUSUKE, MORI SHIGETO
• Format: Patent
• Language: Chinese; English
• Published: 07.08.2013
• 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 purpose of the present invention is to provide a novel locking screw part configured in such a manner that, without the use of a locking agent, the engaged portion of the locking screw part can be reliably prevented from loosening, that the locking screw part can be tightened with high strength, and that the locking screw part can be used repeatedly. The present invention is configured in such a manner that a male screw thread has provided on the clearance flank surface thereof a clearance-side protrusion protruding outward in the radial direction toward the clearance flank surface of a female screw thread, the clearance-side protrusion being configured in such a manner that the crest thereof interferes with the clearance flank surface of the female screw thread while the pressure flank surface of the male screw thread is in contact with the clearance flank surface of the female screw thread, and also in such a manner that, during screw tightening operation, the crest of the clearance-side protrusion is p