| 摘要 |
A helical guide is provided to improve structure of the helical guide to perform precise movement with a small error, thereby minimizing wearing of the helical guide. A helical guide comprises an outer guide(3), a sliding core(4), and a rotary shaft(5). The outer guide has a mounting hole(31) vertically passing through a center of the guide, and a mounting threshold(32) formed at its upper end. The sliding core is formed of a cylindrical carbon material, inserted into the mounting hole of the outer guide, and has four spiral grooves(41) extending along an inner periphery with a certain twist angle. The rotary shaft includes a slider(52), a hooking part(53), a mounting part(54), and a pinion mounting part(55). The slider has four gear teeth corresponding to the spiral grooves. The hooking part integrally extends from an upper part of the slider. The mounting part is installed at a vertical shaft of a gear manufacturing apparatus. The pinion mounting part mounts a pinion thereon to machine a helical gear.
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