Browse Prior Art Database

Noise Reducing Mounting System for Small Electric Motors

IP.com Disclosure Number: IPCOM000081480D
Original Publication Date: 1974-Jun-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Akers, AL: AUTHOR [+2]

Abstract

Most resilient ring mounting systems in common usage today for small electric motors, depend on a single ring of rubber acting in compression only for noise and vibration damping. The described system employs a single piece of rubber, acting both in compression and in shear for noise and vibration damping. Since rubber will absorb considerably more vibration energy in shear than in compression, greatly improved noise isolation and reduced vibration transmission can be realized.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 60% of the total text.

Page 1 of 2

Noise Reducing Mounting System for Small Electric Motors

Most resilient ring mounting systems in common usage today for small electric motors, depend on a single ring of rubber acting in compression only for noise and vibration damping. The described system employs a single piece of rubber, acting both in compression and in shear for noise and vibration damping. Since rubber will absorb considerably more vibration energy in shear than in compression, greatly improved noise isolation and reduced vibration transmission can be realized.

The grommet is arranged so that, at rest position, the weight W of the motor is tending to close the distance between the motor 1 and the base mount 10, in a downward direction. The grommet supports the motor 1 in place through two shear pads 6 acting against the supporting surfaces 7 on the base mount system, and through one compression pad 4 acting against a supporting surface 5 on the base mount system. The shear pads 6 provide good noise and vibration damping characteristics, while the compression pad 4 is necessary to maintain the position of the motor 1 about its nominal center.

When the motor 1 is put under load, a side force F is applied to the motor, tending to close the distance between the motor and base mount 10 in the direction of the force. This direction is normally in a direction perpendicular to the direction of the weight W. Again, the motor is supported in place by the two shear pads 6 acting against the support su...