Boom energy and swing energy recovery system for mobile-linked construction machinery

A boom energy and swing energy recovery system for mobile-linked construction machinery, which is installed in a construction machine to recover energy, wherein the construction machine comprises a boom cylinder comprising a rod raised and lowered by means of a flow of oil, a large chamber, and a small chamber formed on the large chamber, an engine configured to provide the flow of oil to the boom cylinder and connected at its shaft to a main pump, a boom driven up/down by the boom cylinder by means of the flow of oil, and a body installed on a drive unit of the construction machine to swing horizontally by driving of a swing motor, the boom energy and swing energy recovery system comprising:

• a main control valve connected to the boom cylinder to selectively control the flow of oil provided to the boom cylinder;
• a hydraulic motor assembly comprising a hydraulic motor connected to the engine to generate a rotational force by means of oil introduced thereinto and connected at its rotary shaft to the shaft of the engine for provision of the rotational force, and at least one pipe for inflow and outflow of oil therethrough;
• a boom energy recovery unit configured to recover oil wasted during boom-down by the boom cylinder;
• a swing energy recovery unit configured to recover oil wasted during swing of the body;
• a mobile device held by a user;
• and
• a controller linked to the mobile device and configured to control an operation of the construction machine based on an operation signal,
• wherein boom energy generated by means of the oil recovered by the boom energy recovery unit and swing energy generated by means of the oil recovered by the swing energy recovery unit are reused.