A shock mount or isolation mount is a mechanical fastener that connects two parts elastically. They are used for shock and vibration isolation.
Isolation mounts allow a piece of equipment to be securely mounted to a foundation and/or frame and, at the same time, allow it to float independently from the substrate.
Shock mounts can be found in a wide variety of applications.
Shock mounts can be used to isolate the foundation or substrate from the dynamics of the mounted equipment. This is vital on submarines where silence is critical to mission success. Yachts also use shock mounts to dampen the noise (mainly the one transmitted throughout the structure) and increase the comfort. This is usually done through elastic supports and transmission couplings.
Another common example of this are the motor and transmission mounts that are used in virtually every automobile manufactured today. Without isolation mounts, the interior noise and comfort level in today's vehicles would be significantly different than what we have grown accustomed to. In this case, shock and vibration isolation mounts are often chosen by the nature of the dynamics produced by the equipment and the weight of the equipment.
Shock mounts can be used to isolate sensitive equipment from undesirable dynamics of the foundation or substrate. Sensitive laboratory equipment needs to be isolated from handling shocks and ambient vibration. Military equipment and ships need to be able to withstand nearby explosions. Shock mounts are found in some disc drives and compact disc players, in which soft bushings are all that mechanically hold the disk and reading assembly, thereby isolating it from outside vibrations and from other outside loads such as torsion. In this case, isolation mounts are often chosen by the sensitivity of the equipment to shock (fragility) and vibration (natural frequency) and the weight of the equipment. This and nature of the input shock and vibration must be matched.
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Vibration () is a mechanical phenomenon whereby oscillations occur about an equilibrium point. The oscillations may be periodic, such as the motion of a pendulum, or random, such as the movement of a tire on a gravel road. Vibration can be desirable: for example, the motion of a tuning fork, the reed in a woodwind instrument or harmonica, a mobile phone, or the cone of a loudspeaker. In many cases, however, vibration is undesirable, wasting energy and creating unwanted sound.
Package cushioning is used to protect items during shipment. Vibration and impact shock during shipment and loading/unloading are controlled by cushioning to reduce the chance of product damage. Cushioning is usually inside a shipping container such as a corrugated box. It is designed to absorb shock by crushing and deforming, and to dampen vibration, rather than transmitting the shock and vibration to the protected item. Depending on the specific situation, package cushioning is often between thick.
Vibration isolation is the process of isolating an object, such as a piece of equipment, from the source of vibrations. Vibration is undesirable in many domains, primarily engineered systems and habitable spaces, and methods have been developed to prevent the transfer of vibration to such systems. Vibrations propagate via mechanical waves and certain mechanical linkages conduct vibrations more efficiently than others. Passive vibration isolation makes use of materials and mechanical linkages that absorb and damp these mechanical waves.
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