Hydraulische Antriebsvorrichtung für eine Baumaschine

Details

Veröffentlichungs-Nr.

EP4722545

Anmeldetag

8. August 2024

Veröffentlichung

3. April 2025

Rechtsraum

EP

IPC

F15B21/14, E02F9/22

Abstract

A hydraulic drive device (101) for a construction machine (100) includes a hydraulic pump (22) that discharges hydraulic fluid, a hydraulic cylinder (8) that includes a head side chamber (8H) and a rod side chamber (8R), a first passage (31) that connects the hydraulic pump (22) and the head side chamber (8H), a second passage (32) that is connected to the rod side chamber (8R), a third passage (33) that connects the first passage (31) and the second passage (32), and a regeneration control valve (53) arranged in the third passage (33). The regeneration control valve (53) includes a spool capable of being switched between a regeneration position for allowing hydraulic fluid released from the rod side chamber (8R) to flow from the second passage (32) into the first passage (31) and return to the head side chamber (8H), and a meter-in position for allowing hydraulic fluid discharged from the hydraulic pump (22) to flow from the first passage (31) into the second passage (32) and be supplied to the rod side chamber (8R).

Anmelder

Firma

KOBELCO CONSTRUCTION MACHINERY CO., LTD.

Land

🇯🇵 Japan

Fachgebiete