Importance

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Abstract

A terbo gear is provided for efficient use in a worm gear set, using more than one quarter of the worm's diameter as an effective work area. Each tooth on the terbo gear engages the helical thread of the drive worm just below the centerline of the worm, which reduces run-out deflection of the worm and greatly enhances the contact area of every tooth during rotational thrust. A configuration with a worm sandwiched between two terbo gears greatly reduces climb-out deflection of the worm as well, for high load applications. A small, low-power motor can thus create a massive output torque at a very low RPM through the use of a worm gear. The worm gear may be manufactured efficiently and inexpensively by riveting together pre-stamped laminated washers of various sizes to form a blank. Blanks may then be roll-form cut, for example by using either a mandrel with roll-form inserts or a roll-form tap.

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First Claim