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Title:
ELECTRIC MOTOR/HYDRAULIC PUMP ASSEMBLY WITH NOISE REDUCTION FEATURE
Document Type and Number:
Japanese Patent JPH0771390
Kind Code:
A
Abstract:

PURPOSE: To suppress radiation of noises from a motor/pump housing into the atmosphere and suppress vibration directly transmitted from the motor housing to an underlying pump/motor assembly supporting structure by embodying both of noise reducing enclosure and an insulation fit for a motor mounting leg.

CONSTITUTION: A supporting leg 50 is fixed to a motor housing 12 by a bolt 52, and an assembly unit is mounted on an underlying supporting structure. A ferrule 60 formed out of rubber or other elastic vibration absorption material surrounds the frame of the bolt 52 in the radial direction within respective support leg openings. The ferrule 60 isolates the supporting leg 50 from vibratory energy of the motor housing 12 to prevent vibratory noise from being transmitted to the underlying supporting structure. The supporting leg mounting bolt 52 and the ferrule 60 are placed in a noise reducing enclosure 48 to prevent the radiation of airborne noise from the motor housing at a jointed portion of supporting leg/housing into the atmosphere.


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Inventors:
ARUBIN JIEI NIIMIIKU
JIYOOJI EMU RATSUSERU
RONARUDO BII SHIYUUEIGAA
OTSUTOO PII RANGOTSUSHIYU
Application Number:
JP10237694A
Publication Date:
March 14, 1995
Filing Date:
May 17, 1994
Export Citation:
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Assignee:
VICKERS INC
International Classes:
F04C29/04; F01C21/00; F04B17/03; F04B53/08; F04C11/00; F04C29/06; F04D29/66; (IPC1-7): F04C29/06; F04C29/04
Attorney, Agent or Firm:
Kaoru Furuya (2 outside)