Vehicle reinforcing member and vehicle

A vehicle reinforcing member for a vehicle body of a vehicle, the vehicle reinforcing member comprising:

• a cylinder;
• a first piston that sections an inside of the cylinder into a gas chamber and a main liquid chamber and is movable in an axial direction in the cylinder;
• a second piston that sections the main liquid chamber into a first sub-liquid chamber and a second sub-liquid chamber and is movable in the axial direction in the cylinder;
• a piston rod coupled to the second piston and extending to an outside of the cylinder through the second sub-liquid chamber;
• and
• an adjuster that adjusts a moving load through the second piston in the main liquid chamber;
• wherein
• gas is sealed in the gas chamber, and liquid is sealed in the first and second sub-liquid chambers;
• the piston rod is coupled to a first one of two locations on the vehicle body;
• the cylinder is coupled to a second one of the two locations on the vehicle body;
• at least one of the second piston and the piston rod includes a communication path that connects the first sub-liquid chamber to the second sub-liquid chamber;
• the adjuster adjusts the moving load by adjusting a moving amount of liquid in the communication path;
• the adjuster adjusts the moving amount of the liquid in the communication path by changing a cross sectional area through which the liquid passes in the communication path;
• the adjuster includes:
• a moving member including an insertion portion that is insertable into the communication path;
• and
• a driver that moves the moving member;
• the driver changes the cross sectional area through which the liquid passes in the communication path by moving the moving member to change a relative positional relationship between the communication path and the insertion portion;
• the second piston includes a through hole extending in the axial direction;
• the piston rod includes:
• a rod inserted into the through hole of the second piston;
• and
• a cap nut;
• a movement path of the rod extends in the axial direction, and a communication opening connects the movement path to the second sub-liquid chamber;
• a first end of the rod projects into the first sub-liquid chamber;
• the cap nut is attached to the first end of the rod;
• a communication hole in the cap nut connects the first sub-liquid chamber to the movement path of the rod;
• the moving member includes an adjusting rod movably inserted into the movement path of the rod;
• a tip end of the adjusting rod is positioned inside of the cap nut as the insertion portion;
• the communication path includes the communication hole of the cap nut, a clearance between an inner surface of the rod and an outer surface of the adjusting rod, and a communication opening of the rod;
• the driver changes a positional relationship between the communication hole of the cap nut and the insertion portion by moving the adjusting rod relative to the rod;
• the movement path of the rod and the adjusting rod respectively have circular or substantially circular cross-sections;
• and
• the driver includes:
• a first screw thread on an outer surface of the adjusting rod;
• a second screw thread on an inner surface of the rod and that engages with the first screw thread;
• and
• a rotator that rotates the adjusting rod and moves the adjusting rod in the movement path of the rod.