Browse Prior Art Database

Dual Anti-Vibration Mount

IP.com Disclosure Number: IPCOM000037235D
Original Publication Date: 1989-Dec-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Gray, DJ: AUTHOR [+2]

Abstract

A non-linear mount is described having a capability of protecting against severe shocks and also giving isolation from very low vibration levels. This is achieved by two stiff mounts of different characteristics acting in series with each other, between which the file is suspended. One mount includes clamping grommets to accommodate sway, and the other mount surrounds a low friction rod allowing the grommets to act. Total movement of the file is controlled by the clearance between two stops and the other mount.

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Dual Anti-Vibration Mount

A non-linear mount is described having a capability of protecting against severe shocks and also giving isolation from very low vibration levels. This is achieved by two stiff mounts of different characteristics acting in series with each other, between which the file is suspended. One mount includes clamping grommets to accommodate sway, and the other mount surrounds a low friction rod allowing the grommets to act. Total movement of the file is controlled by the clearance between two stops and the other mount.

When a resilient mount is required to isolate a piece of equipment against vibration, it is usually desirable to have a low stiffness, which gives a low natural frequency. It is also an advantage to have high damping properties to ensure that the amplitude does not reach excessive levels, when it is driven by an external force which oscillates at the natural frequency.

If the mount is also required to arrest the motion of the equipment in a limited distance, when it is subjected to a shock load, the mount will need to have a relatively high stiffness. The two requirements can be met simultaneously by the use of a mount having non-linear characteristics, which can be achieved by the shape of the resilient elements.

The general arrangement is shown in the figure. The mass is supported by the two large mounts 1 and 2, which are stiff mounts capable of a relatively large deflection. The stiffness and deflection determine how much ener...