A worm-rack type transmission device

In a worm-rack type transmission device (1), a curved side portion (6) is provided on rack teeth (2a) of a linear rack (2) in a manner to form a part of an ellipsoidal surface (E) and twisted by a changing rate (¸ ) of a torsional manner a toothed streak (5) of a worm wheel (3). The worm wheel (3) b...

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Bibliographic Details
Main Author IMASE, KENJI
Format Patent
LanguageEnglish
French
German
Published 31.08.2011
Subjects
BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HAULING
HEATING
HOISTING
HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDEDFOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCEDIRECTLY TO THE SURFACE OF A LOAD
LIFTING
LIGHTING
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
THERMAL INSULATION IN GENERAL
TRANSPORTING
WEAPONS
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Summary:In a worm-rack type transmission device (1), a curved side portion (6) is provided on rack teeth (2a) of a linear rack (2) in a manner to form a part of an ellipsoidal surface (E) and twisted by a changing rate (¸ ) of a torsional manner a toothed streak (5) of a worm wheel (3). The worm wheel (3) brings the toothed streak (5) into engagement with the curved side portion (6) in a line-to-line contact, enabling to a self-locking property and strengthening a transmission power to insure a high transmission efficiency with a least friction loss so as effectuate a linear drive for an extended distance travel with a high precision.
Bibliography:Application Number: EP20090250476