高減速比フェースギヤに関する研究（第1報，かみ合い解析）

摘要

An analyzing method for applying to various types of face gears is proposed. Equations to calculate the profile of the face gear generated by the pinion as a profile on a cylinder are derived, and the tooth surface of the face gear was expressed by a series of profiles on each cylinder with a different radius. The envelope curve was calculated using the element removal method that simulates a metal removal process by a tool. The obtained results as follows: (1) A meshing condition diagram that reveals a whole aspect of meshing of the face gears with consideration of two kinds of interferences and tip pointing caused on the gear flanks is proposed. (2) Face gear pairs can be designed in compact size by an appropriate offset between the pinion and gear shafts. (3) By using a worm-like pinion under an appropriate offset, there is some possibility of designing the high reduction face gear pair.%車載用などの小型アクチュエータ用減速機は，大き な減速比が容易に得られること，食い違い軸であるた めに設置に場所をとらないことなどの理由により ウオーム歯車が多用される場合が多い．しかし，ウオー ム歯車は，動力伝達効率が低く，ウオームの首下寸法 が大きくなるほか，ホイールをウオームに包絡させた 歯面とする場合，加工に射出成形が利用できないとい う問題がある．本研究では，これらの問題を解決する ために，ウオーム状のピニオンをもつフェースギヤに 着目し，安価で効率の高い小型アクチュエータ用減速 機の関発を目指す．