Suspension apparatus and specialized vehicle including the same

A suspension apparatus comprising:

• a crankshaft fixed to a vehicle body;
• a housing rotatably connected to the crankshaft;
• a first damping portion provided in the housing and comprising a space for accommodating a damping fluid, a size of the space accommodating the damping fluid being adjusted according to an external force applied to the vehicle body;
• a second damping portion provided in the housing, the second damping portion being adjacent to the first damping portion, communicating with the first damping portion via a channel to share the damping fluid with the first damping portion, and comprising:
• a first chamber accommodating a compressed gas;
• and
• a second chamber accommodating the damping fluid, the first chamber and the second chamber facing each other;
• a rotational force applier provided in the housing and configured to apply a rotational force to the housing by adjusting an amount of a working fluid in the rotational force applier;
• and
• a plurality of directional control valves that are each configured to change a flow path of the damping fluid to or from the housing.

A specialized vehicle comprising:

• a vehicle body;
• a caterpillar track connected to the vehicle body, configured to move the vehicle body, and comprising:
• at least one road wheel;
• and
• a track surrounding the at least one road wheel;
• and
• a suspension apparatus provided in the vehicle body and connected to the at least one road wheel,
• wherein the suspension apparatus comprises:
• a crankshaft fixed to the vehicle body;
• a housing rotatably connected to the crankshaft;
• a first damping portion provided in the housing and having a first space to accommodate a damping fluid in the first damping portion;
• a second damping portion provided adjacent to the first damping portion in the housing, connected to the first damping portion to share the damping fluid with the first damping portion, and comprising:
• a second space accommodating a compressed gas in the second damping portion;
• and
• a third space accommodating the damping fluid in the second damping portion, an amount of the damping fluid in the first and second damping portions being adjusted according to an external force applied to the at least one road wheel;
• a rotational force applier provided adjacent to the second damping portion in the housing and configured to apply a rotational force to the housing by adjusting an amount of a working fluid in the rotational force applier;
• and
• a plurality of directional control valves that are each configured to change a flow path of the damping fluid to or from the housing.