Patent ID: 8556047

Claim:
An automobile hydraulic shock absorber comprising: a cylinder body including a first end portion defining one end portion in an axial direction, and a second end portion defining another end portion in the axial direction, the first end portion being connected to one of a vehicle body and a vehicle wheel; a piston arranged to divide an inside of the cylinder body into a first oil chamber on a side of the first end portion and a second oil chamber on a side of the second end portion; a shock absorber connecting portion connected to the other of the vehicle body and the vehicle wheel; a piston rod attached to the shock absorber connecting portion via a damping member, the piston rod passing through the second end portion of the cylinder body from the piston and protruding to an outside of the cylinder body; a volume adjustment mechanism arranged to push on operating oil using pressure of a high-pressure gas, thereby canceling out an excess and a deficiency of the operating oil corresponding to an increase or a decrease in volume of the piston rod during movement of the piston; a communicating passage arranged to communicate the first oil chamber and the second oil chamber via a diaphragm; and a pressure-applying mechanism including a compression coil spring having a first end and a second end, the first end being connected to the piston rod such that the compression coil spring pushes the piston rod toward the first end portion of the cylinder body with a pushing force, the pressure-applying mechanism being disposed outside the cylinder body, and movement of the second end of the pressure-applying mechanism being restricted by the shock absorber connecting portion.