IMPACT ENERGY ABSORBER AND FABRICATION METHOD THEREOF

• Main Authors: UEOKA TOSHITSUGU, MURASE KENJI, NISHIGUCHI KATSUYA, YAMAMOTO KENICHI
• Format: Patent
• Language: English
• Published: 11.02.2010
• Subjects: BLASTING; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; COMBINED OPERATIONS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MACHINE TOOLS; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; POWDER METALLURGY; SHOCK-ABSORBERS; SPRINGS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; UNIVERSAL MACHINE TOOLS; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WEAPONS

A main body of an impact energy absorber is formed by integrally molding a deformable portion and a plurality of deformation controlling portions which are adapted to control the direction of plastic deformation of the deformable portion. The deformation controlling portions have such a configuration and shape that, when a compression load equal to or greater than a predetermined value is input to the main body in a tube axis direction, the deformable portion undergoes plastic deformation in at least one of a radially outward direction and a radially inward direction of the main body concurrently with the compressive plastic deformation in the tube axis direction.