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Browse Prior Art Database

Acoustically Isolated Motor Support

IP.com Disclosure Number: IPCOM000050861D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Burns, PG: AUTHOR [+3]

Abstract

Motor mounts which are employed to bias a motor against a driven gear are conventionally formed of a material such as spring steel. Mile spring steel is effective, it also serves as an excellent transmitter of vibrations and noise, while tying the holder electrically to the remainder of the machine. The bracket or mount described herein is formed of a molded plastic with an integral cantilever-type spring which not only insures electrical isolation from the machine frame but provides acoustical isolation from the machine side plate while providing a biasing of gears against each other to effect zero backlash. Moreover, the use of an injection molded plastic removes the requirement for heat treating a thin steel spring with its attendant problems of warping.

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Acoustically Isolated Motor Support

Motor mounts which are employed to bias a motor against a driven gear are conventionally formed of a material such as spring steel. Mile spring steel is effective, it also serves as an excellent transmitter of vibrations and noise, while tying the holder electrically to the remainder of the machine. The bracket or mount described herein is formed of a molded plastic with an integral cantilever- type spring which not only insures electrical isolation from the machine frame but provides acoustical isolation from the machine side plate while providing a biasing of gears against each other to effect zero backlash. Moreover, the use of an injection molded plastic removes the requirement for heat treating a thin steel spring with its attendant problems of warping. Accordingly, this leads to processing economies (lower scrap rates in production, fewer production steps, etc.).

Referring now to the drawing, a typical motor 10 incorporating a molded cantilever spring segment 11 and molded flexural pivot 12 is illustrated therein. The molded flexural pivot may be connected to the end housing of the motor and provide, in conjunction with the cantilever spring arrangement, pressure of the end gear 13 on the motor shaft against the driven gear 14 to eliminate backlash between the gears 13 and 14. Moreover, the molded flexural pivot and cantilever spring arrangement permits acoustic isolation of the motor from the side plate 15 to which the c...