POWER TRANSMISSION DEVICE

• Main Author: IGI TAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 27.12.2022
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

To reduce backlash in a power transmission device at low cost.SOLUTION: A speed reducer 1 comprises: an input member 10 having first rolling element engaging grooves 13 in side surfaces on both sides in an axial direction; a pair of fixing members 5 having second rolling element engaging grooves 16; a plurality of balls 4 engaged with the first rolling element engaging grooves 13 and the second rolling element engaging grooves 16; and a pair of output members 31, 32 having a plurality of pockets 17 for holding the plurality of balls 4 in a circumferential direction. The first rolling element engaging groove 13 is formed along a circle having a center of curvature eccentric from a rotation center X. The second rolling element engaging groove 16 is formed along a wavy curve that alternately intersects with a pitch circle having a center of curvature on the rotation center X. An elastic member 35 for imparting elastic force in the circumferential direction to both the output members 31, 32 is interposed between the pair of output members 31, 32.SELECTED DRAWING: Figure 1 【課題】動力伝達装置内部のバックラッシを低コストに低減させる。【解決手段】減速装置１は、軸方向両側の側面に第１の転動体係合溝１３を有する入力部材１０と、第２の転動体係合溝１６を有する一対の固定部材５と、第１の転動体係合溝１３と第２の転動体係合溝１６に係合する複数のボール４と、複数のボール４を周方向に保持する複数のポケット１７を有する一対の出力部材３１，３２とを備える。第１の転動体係合溝１３は、回転中心Ｘから偏心した曲率中心を有する円に沿って形成される。第２の転動体係合溝１６は、回転中心Ｘ上に曲率中心を有するピッチ円に対して交互に交差する波状曲線に沿って形成される。一対の出力部材３１，３２の間に、両出力部材３１，３２に円周方向の弾性力を付与する弾性部材３５を介在させる。【選択図】図１