HYDRAULIC CIRCUIT

摘要

A hydraulic circuit (100), comprising a hydraulic cylinder (22), a hydraulic pump (31) driven by a drive source (15) to force-feed a hydraulic oil to the hydraulic cylinder, an operation selector valve (32) disposed between the hydraulic cylinder and the hydraulic pump and switching the operation of the hydraulic cylinder, a hydraulic pressure regulating mechanism (37) regulating a difference between the pressure of the hydraulic pump on the delivery port (31a) side and the pressure of the hydraulic cylinder on the supply port side to a specified value on both sides of the operation selector valve, and a regenerating pipe (36) feeding the hydraulic oil returned from the delivery port of the hydraulic cylinder to the operation selector valve to the hydraulic pump. The hydraulic circuit can recover the energy of the hydraulic oil by a simple structure.