Mounting system for vibration isolation

• US 4,871,142 A
• Filed: 01/03/1989
• Issued: 10/03/1989
• Est. Priority Date: 01/03/1989
• Status: Expired due to Term

• Current Assignee: Perkinelmer Incorporated
• Original Assignee: Perkinelmer Incorporated
• Inventors: deMey, Charles F. II
• Primary Examiner(s): Ramirez, Ramon O.
• Application Number:
  US07/292,759
• Time in Patent Office: 273 Days
• Field of Search: 248/632, 248/560, 248/605, 248/634, 248/635, 248/638, 267/293, 267/153
• US Class Current: 248/632
• CPC Class Codes: F16F 15/08 with rubber springs grommet- or bushing-type resilient mountings F16F1/3732, F16F1/38; with springs made of rubber and metal arrangement of internal-combustion or jet-propulsion units B60K5/12; mounting of propulsion plants on vessels B63H21/30; mounting of vehicle drivers' cabs B62D33/0604
• CPC Class Codes: G12B 9/08 Supports; Devices for carrying

Abstract

A mounting system includes a carriage member section of an apparatus being isolated from external vibrations, and a bench member having three support assemblies thereon to support the apparatus. Each support assembly comprises an upwardly oriented pin affixed to the bench member, and an elastomer isolating ring with a central hole press fitted onto the pin. The carriage member has an aperture therein aligned with each support assembly. The aperture is shaped as a slot portion superimposed centrally on a circular hole portion press fitted over the isolating ring. The isolating ring thereby is retained in compression between the pin and the outer wall such that elastomer overfill of the isolating ring can expand into the slot portion sufficiently to compensate for tolerance misalignment between the support member and the aperture, without substantial thickening of the isolating ring. A clamping assembly with an elastomer isolation pad holds the carriage onto three upward protrusions over each support assembly. A clamping assembly with an elastomer isolation pad holds the carriage onto three upward protrusions over each support assembly.

Claims

1. A mounting system for isolating an apparatus from external vibrations, including a carriage member section of an apparatus being isolated from external vibrations, and a bench member having at least one support assembly thereon positioned to support the carriage member and thereby the apparatus;

the support assembly comprising a pin affixed perpendicularly to the bench member and an elastomer isolating ring with a central hole-press fitted onto the pin;

the carriage member having an aperture therein generally aligned with the support assembly, the aperture including a slot portion and a ring engagement portion, the ring engagement portion being defined by an outer wall, the outer wall being press fitted over the isolating ring with the slot portion being unfilled by the isolating ring wherein;

the isolating ring is retained in compression between the pin and the outer wall such that elastomer overfill of the isolating ring can expand into the slot portion sufficiently to compensate for tolerance misalignment between the support member and the aperture without substantial thickening of the isolating ring.

2. A mounting system according to claim 1 wherein the support assembly further comprises a boss protruding from the bench member, with the pin affixed to the boss, the boss having a diameter greater than that of the pin so that the isolating ring rests on the boss.

3. A mounting system according to claim 1 wherein the aperture is shaped as a slot portion superimposed centrally on a hole portion, the hole portion being defined by the outer wall and having a maximum hole dimension transverse to the slot portion with the slot portion having a width less than the hole dimension and a length greater than the hole dimension.

4. A mounting system according to claim 3 wherein the hole portion is a portion of a circular hole with the hole dimension being a hole diameter.

5. A mounting system according to claim 4 wherein the hole portion has a central axis with the outer wall extending arcuately about the central axis approximately 120°

on each side of the slot portion.

6. A mounting system according to claim 1 wherein the slot portion is formed as two legs extending diametrically opposite from the ring engagement section.

7. A mounting system according to claim 1 wherein the at least one support assembly comprises a plurality of support assemblies, and the at least one aperture comprises a corresponding plurality of apertures at locations corresponding to those of the support assemblies.

8. A mounting system according to claim 7 wherein the plurality of support assemblies and the plurality of apertures each comprise three in number.

9. A mounting system according to claim 8 wherein each support assembly is positioned to support one third of the weight of the apparatus.

10. A mounting system according to claim 7 wherein with the bench member generally horizontal the apparatus has a center of mass defining a location of a vertical axis, and the slots each have a longitudinal axis aligned on a radius extending from the vertical axis.

11. A mounting system according to claim 7 wherein, with the bench member generally horizontal, the apparatus has a center of mass defining a location of a vertical axis, with the support assemblies and corresponding apertures being equally spaced arcuately about the vertical axis.

12. A mounting system according to claim 7 further including a clamping assembly disposed between the support assemblies, the clamping assembly comprising the carriage member having a first central hole therein and a respective upward protrusion on the carriage member located over each support assembly, a disk member disposed on the respective protrusions and having a second central hole therein aligned with the first central hole, an elastomer isolation pad having a third central hole therein and being retained on the disk member with the third hole aligned with the first and second holes, and a clampdown screw extending through the first, second and third holes without contacting the disk member or the carriage member, the clampdown screw engaging the bench member such as to retain the pad and the disk member in compression.

13. A mounting system according to claim 12 wherein, with the bench member generally horizontal, the apparatus has a center of mass defining a location of a vertical axis, with the support assemblies and corresponding apertures being equally spaced arcuately about the vertical axis, and the clamping assembly is disposed proximate the vertical axis.

14. A mounting system for isolating an apparatus from external vibrations, including a carriage member section of an apparatus being isolated from external vibrations, and a bench member having three support assemblies thereon each being positioned under the carriage member to support one third of the weight of the apparatus;

each support assembly comprising a boss protruding upwardly from the bench member, an upwardly oriented pin centrally affixed to the boss, and a circular elastomer isolating ring with a central hole press fitted onto the pin, the boss having a diameter greater than that of the pin so that the isolating ring rests on the boss wherein;

the carriage member has three apertures each being generally aligned with a corresponding support assembly, each aperture being shaped as a slot portion superimposed centrally on a portion of a circular hole, defined by an outer wall, the outer wall being press fitted over the isolating ring with the slot portion being unfilled by the isolating ring, the hole portion further having a diameter dimension transverse to the slot portion, the slot portion having a width less than the diameter and a length greater than the diameter with the slot portion being unfilled by the isolating ring, the hole portion further having a central axis with the outer wall extending arcuately about the central axis approximately 120°

on each side of the slot portion;

with the slot portion formed as two legs extending diametrically opposite from the hole portion;

the apparatus has a center of mass defining a location of a vertical axis, with the support assemblies and corresponding apertures being equally spaced arcuately about the vertical axis, and with the slot portions of each aperture having a longitudinal axis aligned on a radius extending from the vertical axis;

the isolating ring is retained in compression between the pin and the outer wall such that elastomer overfill of the isolating ring can expand into the slot portion sufficiently to compensate for tolerance misalignment between the support member and the aperture, without substantial thickening of the isolating ring.