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1. (WO2018142909) BALL REDUCTION GEAR

Pub. No.:    WO/2018/142909    International Application No.:    PCT/JP2018/000888
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Wed Jan 17 00:59:59 CET 2018
IPC: F16H 1/32
F16H 25/06
Applicants: ENPLAS CORPORATION
株式会社エンプラス
Inventors: KAJIWARA, Yasushi
梶原 靖
Title: BALL REDUCTION GEAR
Abstract:
[Problem] To provide a ball reduction gear which has a simple structure and for which the machining workload is low. [Solution] A ball reduction gear 1 is provided with an eccentric disk cam 4 that rotates integrally with input-side rotating bodies 2, 3, a swinging body 5 that is swung by the eccentric disk cam 4, a plurality of balls 6 supported by the swinging body 5, a fixed member 7 positioned radially outward from the swinging body 5, a first output-side rotating body 8A that faces one side surface of the fixed member 7, and a second output-side rotating body 8B that faces the other side surface of the fixed member 7 and is fixed to the first output-side rotating body 8A. A plurality of radial grooves that guide the balls 6 along the radial direction are formed in the fixed member 7. A waveform groove 40 that guides the balls 6 in a waveform shape along the circumferential direction is formed so as to straddle the first output-side rotating body 8A and the second output-side rotating body 8B. The depth of the waveform groove 40 at the crest of the wave is greater than that at the trough of the wave, in an alternating manner on the first output-side rotating body 8A side and the second output-side rotating body 8B side.