SWING SYSTEM AND CONSTRUCTION MACHINERY OR VEHICLE COMPRISING A SWING SYSTEM

摘要

The invention relates to a swing system (100) for a construction machinery (200) or vehicle, particularly an excavator or a crane, comprising a swing brake (32a) for blocking or unblocking a rotational movement of a first portion (202) of the vehicle (200) relative to a chassis portion (204) of the vehicle (200), and comprising a swing pump (10) and a swing motor (12) provided for performing the rotational movement. The swing pump (10) can be positioned in a neutral position where no rotational movement of the first portion (202) takes place. At least one brake control actuator (34, 42) is provided for automatically engaging the brake (32a) when the swing pump (10) is in its neutral position. The swing system (100) provides an improved control of the swing movement on a slope and an improved comfort during operation of the swing movement.