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Harmonic Drive is a strain wave gear which can improve certain characteristics compared to traditional gearing systems. ''Harmonic Drive'' is trademarked by the Harmonic Drive company. The strain wave gear was invented in 1957 by C.W. Musser. The advantages include: no backlash, compactness and light weight, high gear ratios, reconfigurable ratios within a standard housing, good resolution and excellent repeatability (linear representation) when repositioning inertial loads, high torque capability, and coaxial input and output shafts.〔 High gear reduction ratios are possible in a small volume (a ratio from 30:1 up to 320:1 is possible in the same space in which planetary gears typically only produce a 10:1 ratio). They are typically used in industrial motion control, machine tool, printing machine, robotics and aerospace, for gear reduction but may also be used to increase rotational speed, or for differential gearing. ==History== The basic concept of strain wave gearing (SWG) was introduced by C.W. Musser in his 1957 patent. It was first used successfully in 1960 by USM Co. and later by Hasegawa Gear Works, Ltd. under license of USM. Later, Hasegawa Gear Works, Ltd. became Harmonic Drive Systems Inc. located in Japan and USM Co. Harmonic Drive division became Harmonic Drive Technologies Inc.〔(Harmonic Drive Systems Company Information )〕 The electrically-driven wheels of the Apollo Lunar Rover included strain wave gears in their gearing. Also, the winches used on Skylab to deploy the solar panels were powered using strain wave gears. Both of these system were developed by The Harmonic Drive Division of United Shoe Machinery Corp. On January 1, 2006, Harmonic Drive Technologies/Nabtesco of Peabody, MA and HD Systems of Hauppauge, NY, merged to form a new joint venture, Harmonic Drive LLC.〔 〕 HD Systems, Inc. was a subsidiary company of Harmonic Drive System, Inc. Offices are maintained in Peabody, MA, Hauppauge, NY, San Jose, CA and Oak Park, IL. Harmonic Drive Systems, Inc., Japan is headquartered in Tokyo with its primary manufacturing location in Hotaka, Japan. Harmonic Drive AG has its European headquarters and manufacturing in Limburg/Lahn,Germany. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Harmonic drive」の詳細全文を読む スポンサード リンク
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