The conical rubber ring vibration mounts

A form of the conical rubber vibration mounts design is given again in Figure 1. It is described as a machine suspension and is used to isolate vibrations of heavy machine tools, e.g. eccentric presses becuase the specific energy storage of rubber vibration mounts is greater than that of steel ring . The machine support absorbs vertical force very softly but at the same time is sufficiently stiff to cope with horizontal forces. It thus meet the requirements it will prevent any undersirable floating of the suspended machine that would arise with compression loaded elastic rubber vibration mounts. Furthermore the low overall height and full protection of the rubber from oil leaks are worth emphasising as well as the complete freedom from maintenance and the great durability, which is where a machine support derives most benefit from the favourable combination of shear and compressive stresses in the rubber vibration mounts.

Figure 1 conical rubber ring vibration mount

The flat rubber mounts

The flat rubber sandwich mounts both the loaded face and the rubber cross section are rectangular. As with circular sandwich rubber pads it is possible to have a pure compressive stress or a pure shear stress or a combination of both. Two flat rubber mounts shear springs would be used which are preloaded in compression to avoid possible tensile strain. The rubber layer is intentionally narrowed by 5 to 10% using compression. In this way it is possible to choose a shear loading three times higher than that for a flat rubber mounts without compression.

Flat rubber mounts of greater length are called rubber strips or mats. They are avilable in lengths up to 2,000 mm and are specially suitable for isolating the vibration of heavy machines.

Rubber strips are delivered in stock lengths, but can also be cut to any required length. The metal parts are sufficiently thick for holes to be drilled and tapped later for mounting purposes.

Installation example of flat rubber mounts are shown in Figure 1.

Figure 1 Example of flat rubber mounts sub-assemblies