Leveling device null of rear biaxial easasupenshiyon

摘要

PURPOSE:To raise extricability of a large-sized bus and the like fallen in a cavity on the ground, by constituting a levelling device for the large-sized bus so that a levelling valve is provided on the rear shaft side, in the same way as on the front shaft side, and connecting a feed/exhaust port of the levelling valve on the rear shaft side to an air exhaust port of the levelling valve on the front shaft side. CONSTITUTION:When a front wheel R1 falls in a cavity 9 on the ground, a lever 4 of a levelling valve 3 on the front shaft 1a side, descends. Accordingly, an air exhaust port 8 of the levelling valve 3 opens, and air in bellows 2a, 2b flows from the exhaust port 8 into a levelling valve 3a on the rear shaft 1b side. However, as a lever 4a of the levelling valve 3a on the rear shaft 1a side, ascends for closing an air feed port 6a, it is prevented that air of the bellows 2a, 2b is discharged into the atmosphere, and consequently, the wheel load of the front wheel R1 does not vanish. Accordingly, running ability for coming out of the cavity 9, can be insured.