ARM REGENERATION DEVICE FOR CONSTRUCTION EQUIPMENT AND CONTROL METHOD

摘要

Disclosed are: an arm regeneration device for controlling hydraulic oil supplied to an arm cylinder during grading work by the combined movement of a boom and an arm; and a control method. According to the present invention, provided is the arm regeneration device for construction equipment, comprising: first and second hydraulic pumps and a pilot pump; an arm cylinder connected to the first hydraulic pump; a first control valve for controlling hydraulic oil flow supplied to the arm cylinder during switching; an arm operation lever; a boom cylinder connected to the second hydraulic pump; a second control valve for controlling hydraulic oil flow supplied to the boom cylinder during switching; a boom operation lever; an arm regeneration valve provided to a path between the meter-in-port of the first control valve and the hydraulic oil tank; an arm regeneration cut valve for releasing a regeneration function by switching the arm regeneration valve by the hydraulic oil supplied from the pilot pump during switching; a selection switch; and a controller for maintaining the regeneration function of the arm regeneration valve in a default state when releasing a grading mode by the operation of the selection switch, and for applying an electric signal to the arm regeneration cut valve so as to release the regeneration function of the arm regeneration valve when the grading mode is selected by the operation of the selection switch.