TWISTING PREVENTION STRUCTURE OF THROUGH BOLT

PROBLEM TO BE SOLVED: To provide a twisting prevention structure of a through bolt, preventing the occurrence of twisting in the through bolt and loosening of the fastened through bolt in a breaker body of a hydraulic breaker. SOLUTION: In the breaker body 1 of the hydraulic breaker, the twisting pr...

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Bibliographische Detailangaben
Hauptverfasser:	AYANO MASAKI, FUKUI NOBUYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HAND TOOLS HEATING LIGHTING MANIPULATORS MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERCUSSIVE TOOLS PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a twisting prevention structure of a through bolt, preventing the occurrence of twisting in the through bolt and loosening of the fastened through bolt in a breaker body of a hydraulic breaker. SOLUTION: In the breaker body 1 of the hydraulic breaker, the twisting prevention structure of the through bolt is so constructed that a front head 12, a cylinder 14 and a back head 16 are integrated with each other by the through bolt 26 and fastening nuts 36f, 36b. A key groove 24 is formed in a bolt hole 22b of the back head 16, a key 44 mounted in the key groove 24 is abutted on a cutout surface 34 of the through bolt 26 so that a contact surface 40 formed by cutting out the outer periphery of the fastening nut 36f is abutted on a support surface 20 of a cutout 18 of the front head 12. Thus, twisting of the through bolt 26 can be prevented to prevent turning of the fastening nut 36f. COPYRIGHT: (C)2006,JPO&NCIPI