Axle assembly for a heavy goods vehicle, heavy goods vehicle comprising at least one axle assembly of this kind, and hydraulic arrangement, in particular for adjusting an adjustable unit that is formed as a cylinder-piston arrangement

An axle assembly which is designed and intended to be used in a heavy goods vehicle, the axle assembly comprising:

• a pivot bearing having a substantially vertically extending steering rotational axis (X),
• a wheel support that is arranged so as to be rotatable about the steering rotational axis (X) and comprises at least one wheel that is mounted thereon so as to be rotatable about a wheel rotational axis (Z), the wheel rotational axis (Z) extending substantially horizontally and, in the case of straight travel, transversely to a travel direction (V), and the wheel rotational axis (Z) being arranged behind the steering rotational axis (X), in the travel direction (V), in every deflection state of the axle assembly, during straight travel, and
• a unit that is adjustable about the steering rotational axis (X) when the wheel support is rotated,
• the adjustable unit being adjustable between two operating states, specifically a forwards travel operating state in which it influences the rotational movement of the wheel support about the steering rotational axis (X), and a reverse travel operating state in which it introduces a steering force, which steers the axle assembly, into the axle assembly, such that the axle assembly is operated as a positively steered axle assembly.