shock absorber

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shock absorber,

device for reducing the effect of a sudden shock by the dissipation of the shock's energy. On an automobile, springs and shock absorbers are mounted between the wheels and the frame. When the wheels hit a hole or a raised spot on a road, the springs absorb the resultant shock by expanding and contracting. To prevent the springs from shaking the frame excessively, their motion is restrained by shock absorbers, which are also known by the more descriptive term dampers. The type of shock absorber found on automobiles is usually a hydraulic type that has a casing consisting of two tubes, one telescoping into the other. In order for a spring to expand and contract, it must pull apart and push together the ends of this shock absorber. But the ends offer so much resistance that the motion of the spring quickly dies out. The ends are connected to a piston in an oil-filled chamber in the shock absorber's inner tube. The piston can only move if it forces oil past it through valves. This arrangement creates a large resistance to any motion by the piston and consequently by the ends. On some automobiles a type of hydraulic suspension is used to function both as a spring and as a shock absorber. It comprises a sealed spherical container filled with equal volumes of hydraulic fluid and gas under pressure. The compression of the gas, which absorbs the shock, is supplied by the vehicle's engine. Shock absorbers are used on aircraft to ease the impact upon landing. Some machines are mounted on resilient materials composed, e.g., of cork or rubber. The materials act as shock absorbers, isolating the vibrations of the machine from the surrounding area.

shock absorber

[′shäk əb‚zȯr·bər]
(mechanical engineering)
A spring, a dashpot, or a combination of the two, arranged to minimize the acceleration of the mass of a mechanism or portion thereof with respect to its frame or support.

shock absorber

A device built into the landing gear of an aircraft to absorb the shock that occurs when the aircraft touches down on landing and during a ground roll to decrease shock in the airframe. The most common form of shock absorber is an oleo (oil and gas) strut. See oleo leg.

shock absorber

any device designed to absorb mechanical shock, esp one fitted to a motor vehicle to damp the recoil of the suspension springs
References in periodicals archive ?
Powerdown supports the venture with over 33 years of experience and technical knowledge in the shock absorber industry, an established OEM and aftermarket distribution network, a foot print into new markets and an increasing overseas clientele base.
Using of the proposed designs of the adaptive shock absorbers and the elastic elements will allow the following:
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It is being employed in monotube shock absorbers for SUVs.
The modelling of all shock absorbers and processes is done repeatedly with different oil temperatures, different heat transfer coefficient from oil to body and heat transfer coefficient from atmosphere to body.
The problem of other than throttle-valve performances implementation remains still unsolved for the known hydraulic shock absorbers (lever-vane in particular).
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Knowing that the springs had been designed at Nottingham University during the early 1980s, he contacted the university but was told that the doctor who had invented the shock absorbers had passed away.
Shock absorbers do more than just protect the driver's health.
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The moderns concerns of the specialists regarding to the shock absorbers designs consist in the achievement of somes shock absorbers that has an optim damping characteristic in conformity with the functioning conditions.