Self-locking bolt capable of automatically locking and loosening

• Main Authors: ZHANG YONGSHENG, HUANG YUQIANG, PENG YUELI, CHEN ZIYIN, QI CHUNFENG
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2012
• 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 provides a self-locking bolt capable of automatically locking and loosening and relates to a self-locking bolt. A spring (5) is sleeved on a connecting rod (4); a thread head (11) at the upper end of the connecting rod (4) passes through an internal thread (3) at a screwing end (2) so as to be arranged in an upper dent (1); the upper end of the spring (5) props against a step of an unthreaded hole (6) at the lower part of the internal thread (3), and the lower end of the spring (5) props against the upper end surface of a conical block (10); the conical block (10) is inserted in the port part of the lower end of the unthreaded hole (6), and the width of a collapsible groove (9) is increased by virtue of the conical block (10) so as to form the expansion self-locking of an external thread (7). According to the self-locking bolt, the propping action of the conical block for the conical hole of a lower rod body is utilized, so that the external thread at the lower end of the rod body and a screw ho