CONSTRUCTION AND CIVIL ENGINEERING MACHINE WITH FIBER REINFORCED ACCUMULATOR

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive and energy-saving quiet construction and civil engineering machine for solving a problem that noise and vibration in a construction and civil engineering machine are large during work especially at a high load, regulation in noise and vibration has been required by residents, and performance and energy efficiency of the machine have been temporarily deteriorated due to a silencer or the like for reducing noise.;SOLUTION: A conventional hydraulic closed circuit using a variable capacity pump directly coupled to a prime mover is eliminated, and as a fundamental solution of noise reduction, a light-weight fiber reinforced accumulator and a constant capacity pump are adopted to prevent an increase in noise during the high rotation of a hydraulic pump at an overload and to save energy. The accumulator formed of precipitation-hardened stainless steel that can be casted is adopted, and by reinforcing fibers, a fatigue life is extended by a self-tightening process, and the cost and weight are reduced.;COPYRIGHT: (C)2007,JPO&INPIT