Double revolution surface quadric enveloping worm gear pairs and its production method

Abstract

It relates to a dual return curve face secondary enveloping ring worm sub and its manufacturing method. A plane curve AB as the disk tool, with the return curve formed by AB and the mid plane symmetrically formed A'B'return curve as the disk tool's dual generation planes, getting first enveloping ring worm spiral gear plane at both side of the ring worm gear groove, using spiral plane as the tool generating plane, processing turbine gear plane, spiral gear plane No.1 teething with turbine gear plane resulted from No.2, realizing secondary enveloping ring plane worm sub of the dual return curve. It is simple in structure, operation time saving, easy to ensure high precision, convex and concave teething, flexible to realize failure modification.

Description

technical field [0001] The invention belongs to the technical field of secondary enveloping toroidal worm drive devices. In particular, it relates to a double-revolving curved surface quadratic enveloping toroidal worm pair and a manufacturing method thereof. Background technique [0002] Among the existing double-enveloping toroidal worm drives, the plane two-pack and the single-cone and double-cone two-pack are more mature. Their common advantages are large carrying capacity, high transmission efficiency and long service life. The disadvantage is that when the worm has more heads (Z 1 >6) or the speed ratio is small (i 12 <10), undercutting or sharpening of side tooth tops are likely to occur with two-pack planes; the tooth profiles on both sides of the two-pack worm tooth grooves on plane two-pack or single-cone two-pack need to be ground separately, so the structure of the tool seat and the adjustment of the machine tool are relatively difficult. Complicated, l...

AI Technical Summary

Problems solved by technology

The disadvantage is that when the worm has more heads (Z 1 >6) or the speed ratio is small (i 12 <10), undercutting or sharpening of side tooth tops are likely to occur with two-packs on the plane; the tooth profiles on both sides of the two-packs on the plane or single-cone two-packs worm need to be ground separately, so the structure of the tool seat and the adjustment of the machine tool are relatively difficult. Complicated, long auxiliary time, reducing machining accuracy; compared with flat two-pack, the instantaneous contact line of double-cone two-pack is dense, the total contact area is reduced, and as the number of worm heads increases, the microscopic meshing quality decreases (Dong Xuezhu, Design and modification of toroidal worm drive, Beijing: Mechanical Industry Press, 2004)

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