Browse Prior Art Database

Shock Mount Assembly

IP.com Disclosure Number: IPCOM000121107D
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Dance, WG: AUTHOR [+2]

Abstract

Shock mounting grommets each require an internal cylindrical liner bush to support the central mounting screw. Disclosed is a design which molds the bush to the grommet. Overall tolerance bands associated with separate parts, assembly problems and part numbers are all reduced by molding together the rubber bush, its liner bush and a flexible spring in situ .

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Shock Mount Assembly

      Shock mounting grommets each require an internal
cylindrical liner bush to support the central mounting screw.
Disclosed is a design which molds the bush to the grommet.  Overall
tolerance bands associated with separate parts, assembly problems and
part numbers are all reduced by molding together the rubber bush, its
liner bush and a flexible spring in situ .

      Conventionally, shock mounts have threaded studs molded into
them or two single-sided bushes are used for each shock mount, or
loose cylindrical sleeves are pressed into grommets for use with
standard flat washers.  This alternative method requires fewer parts
per shock mount, has lower tolerances and avoids the falling out of
separate headed bushes during assembly.

      With reference to the figure, a liner bush 1, made in one piece
of an appropriate metal, such as zinc, is positioned concentrically
with respect to a laminated metal spring assembly 2 and in alignment
with fixing holes 3 in the flexible mounting spring 2.  A bush 4 made
of an elastic material, such as rubber, is then molded in a suitable
molding tool that precisely locates the inner 1 and outer 2
components within their relative positions.  The molding tool
accurately controls the positions of all components to suit the
application.

      In the design as shown, a bolt (not shown) would pass through
bush 1 to some apparatus, while the shock mounting would be attached
via holes 3 to a support stru...