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 ?
And in the last section we investigate operating characteristics of the units of our developed suspension, such as, a lockable adaptive shock absorber and an elastic element with a nonlinear characteristic on the different modes of work.
(2) The shock absorber is equivalent to a mass-spring-damping system, ignoring the geometry of the shock absorber and the inhomogeneity of the mass distribution.
The Shock Latch will provide hydraulic shock absorbers with the necessary protection to prevent wear and tear.
During the third stage, the estimation of shock absorber's body alloy influence on the thermal conductivity through the wall of the shock absorber's body and its transfer from the wall to the atmosphere, is made.
In quality of a the basic unit whose functionality is expected to expand, we consider a known lever-vane shock absorber (Fig.
It is necessary to prevent these loads reaching dangerous levels by providing for shock absorbers to be installed from an early stage of the design.
This research focuses on an electromagnetic shock absorber due to its advantage compared to other absorbers used in such fields as energy management.
BEAK/OUTER CASE: Just as the woodpecker's beak is rigid and strong, so is the shock absorber's steel casing.
The move includes the closure of its Toronto original equipment shock absorber operation, and its Chickasha, Okla., packaging and distribution center.
And that ability to infinitely vary the damping force within the jounce and rebound parameters of a shock absorber not only fundamentally changes the ride-handling compromise by increasing the suspension's effective bandwidth, it offers automakers the opportunity to standardize a platform's specification while customizing each model's feel.
In a conventional shock absorber, oil is forced around the piston as it progresses down the bore, the space between piston and bore governing the response rate and damping behavior of the shock absorber.
The fund has been a significant "shock absorber" between reinsurers and the storm damage in Florida this year, said Paul Karon, president and chief operating officer of reinsurance broker Benfield plc's North American operations.