ホブ切りされた円すい形インボリュート歯車の歯形

概要

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A conical involute gear, which resembles in shape a spur gear-shaper cutter, is generated by feeding the cutter along any element of the cone. There is no question about the way of generating a gear with a rack cutter or a spur gear-shaper cutter.　Now speaking of generating a conical gear, the way of using a hob is practically much commoner and easier than that of using a rack cutter or a gear-shaper cutter. Cutting the gear with a hob comes to the same result with cutting it with a rack cutter set obliquely to the pitch circle of the gear, as the hob is shaped into a screw-like form. Asymmetric teeth are obtained by feeding a rack cutter set obliquely to the pitch circle of the gear along any element of the cone.　We show in detail the process of generating a conical gear with a hob and the difference between both the normal pitches of the right and the left profiles of a gear tooth. If the conical gears are mounted on the two parallel shafts, they rotate smoothly, but if they are mounted on the two intersecting shafts in place of the bevel gears, their mesh is not conjugate theoretically.
山形大学の論文
1976-02-20