Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1985-02-26
1987-04-07
Braun, Leslie A.
Machine element or mechanism
Gearing
Directly cooperating gears
248606, 248638, F16H 112, F16H 120
Patent
active
046550992
ABSTRACT:
A mounting plate assembly has provisions for reducing the motor noise transmission from a DC stepper motor or the like that has an associated reducing gear assembly. The mounting plate assembly is formed of a front plate which provides the bushings for the shafts of the reducing gears and on which an output bearing is mounted for journalling an output shaft. A generally discoid inner mounting plate of a first diameter is affixed adjacent the front plate and serves as a mount for holding the retaining cup or the overall stepper motor and gear assembly. An outer mounting plate, which has a second diameter smaller than the first diameter, serves for mounting the overall assembly in place, and has an aperture, favorably provided with a sleeve, coaxial with the output bearing. In order to provide acoustic isolation, a layer of resilient rubber is vulcanized in place between the inner and outer mounting plates. A portion of the gasket fills the annulus between the output bearing and the sleeve. This structure reduces the output noise from about 50 dB to about 31 dB. In other embodiments a suitable pressure sensitive or thermal sensitive adhesive may be substituted for the layer of resilient rubber.
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Braun Leslie A.
Robinson, Jr. Lee C.
Tri-Tech, Incorporated
Wright D. M.
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