Hydraulic shock absorber

A hydraulic shock absorber in which a vehicle body side tube and a wheel side tube are slidably fitted to each other;

• a hollow rod mounted to the vehicle body side tube is inserted into an operating oil chamber inside the wheel side tube,
• a piston that slidably moves in the operating oil chamber is provided at a tip portion of the hollow rod,
• the operating oil chamber is partitioned by the piston on both sides of the piston into a rod side oil chamber that houses the hollow rod and a piston side oil chamber that does not house the hollow rod;
• and a suspension spring is arranged in the piston side oil chamber inside the wheel side tube,
• the hydraulic shock absorber comprising a spring load adjusting device that adjusts a spring load of the suspension spring, wherein
• stopper means for restricting a maximum tension stroke is provided around the hollow rod inside the vehicle body side tube and the wheel side tube, and
• the spring load adjusting device is configured such that an adjuster is provided at an upper end portion of the vehicle body side tube,
• a push rod that is moved up and down by the adjuster is penetrated into a hollow portion of the hollow rod,
• the suspension spring is pressurized by the push rod that protrudes from the hollow portion of the hollow rod into the piston side oil chamber, and
• the spring load of the suspension spring can be adjusted by the up-and-down motion of the push rod caused by the adjuster.

A hydraulic shock absorber in which an inner tube that is a wheel side tube is slidably fitted into an outer tube that is a vehicle body side tube;

• a partition wall member is provided on an inner circumference of the inner tube such that an operating oil chamber is defined below the partition wall member and an oil reservoir chamber is defined above the partition wall member;
• a hollow rod mounted to the outer tube is penetrated through the partition wall member and inserted into the operating oil chamber,
• a piston that slidably moves in the operating oil chamber is provided at a tip portion of the hollow rod, and the operating oil chamber is partitioned by the piston on both sides of the piston into a rod side oil chamber that houses the hollow rod and a piston side oil chamber that does not house the hollow rod;
• and a suspension spring is arranged in the piston side oil chamber inside the inner tube, the hydraulic shock absorber comprising a spring load adjusting device that adjusts a spring load of the suspension spring, wherein
• stopper means is provided around the hollow rod in the rod side oil chamber inside the inner tube so that, upon maximum tension, the stopper means provided around the hollow rod abuts the partition wall member to thereby enable a maximum tension stroke to be restricted, and
• the spring load adjusting device is configured such that an adjuster is provided at an upper end portion of the outer tube,
• a push rod that is moved up and down by the adjuster is penetrated into a hollow portion of the hollow rod,
• the suspension spring is pressurized by the push rod that protrudes from the hollow portion of the hollow rod into the piston side oil chamber, and
• the spring load of the suspension spring can be adjusted by the up-and-down motion of the push rod caused by the adjuster.

A hydraulic shock absorber in which a vehicle body side tube and a wheel side tube are slidably fitted to each other;

• a hollow rod mounted to the vehicle body side tube is inserted into an operating oil chamber of a damper cylinder erected in the wheel side tube,
• a piston that slidably moves in the piston on both sides of the piston into a rod side oil chamber that houses the hollow rod and a piston side oil chamber that does not house the hollow rod;
• and a suspension spring is arranged in the piston side oil chamber inside the damper cylinder,
• the hydraulic shock absorber comprising a spring load adjusting device that adjusts a spring load of the suspension spring, wherein
• stopper means is provided around the hollow rod in the rod side oil chamber inside the damper cylinder so that, upon maximum tension, the stopper means provided around the hollow rod abuts a rod guide of the damper cylinder to thereby enable a maximum tension stroke to be restricted, and
• the spring load adjusting device is configured such that an adjuster is provided at an upper end portion of the vehicle body side tube,
• a push rod that is moved up and down by the adjuster is penetrated into a hollow portion of the hollow rod,
• the suspension spring is pressurized by the push rod that protrudes from the hollow portion of the hollow rod to the inside of the wheel side tube, and
• the spring load of the suspension spring can be adjusted by the up-and-down motion of the push rod caused by the adjuster.