PLANETARY GEAR MECHANISM AND SPEED REDUCER INCLUDING THE SAME

• Main Authors: SASAOKA EIJI, NINOMIYA KAI, ISHIGURE KIMIHIRO, TANAKA HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 06.06.2024
• 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 provide a technology which enables reduction of the number of components of a planetary gear mechanism to achieve simplification of the planetary gear mechanism.SOLUTION: A planetary gear mechanism 10 includes: a first ring gear 11 and a second ring gear 12; a planetary gear 2; and a carrier 3 and these may rotate around a first axis X1 relative to each other. The number of teeth of the first ring gear 11 is different from the number of teeth of the second ring gear 12. The planetary gear 2 includes: first gear parts 21 configured to mesh with the first ring gear 11; and second gear parts 22 configured to mesh with the second ring gear 12. The first gear part 21 and the second gear part 22 are supported on a planetary shaft 4 disposed on a second axis X2 so as to rotate around the second axis X2 integrally. The carrier 3 includes a shaft support part 31 supporting the planetary shaft 4. The shaft support part 31 includes: a shaft insertion part 32 into which the planetary shaft 4 is inserted; and an elastic member 33 which presses a portion, which is inserted into the shaft insertion part 32, of the planetary shaft 4 to the radial outer side R2.SELECTED DRAWING: Figure 1 【課題】遊星歯車機構の部品数を少なく抑え、遊星歯車機構を簡素な構成とすることが可能な技術を提供する。【解決手段】遊星歯車機構１０は、第１リングギヤ１１及び第２リングギヤ１２と、遊星ギヤ２と、キャリヤ３と、を備え、それらは第１軸心Ｘ１回りに相対回転自在であり、第１リングギヤ１１と第２リングギヤ１２とは歯数が異なり、遊星ギヤ２は、第１リングギヤ１１に噛み合う第１ギヤ部２１と、第２リングギヤ１２に噛み合う第２ギヤ部２２と、を備え、第１ギヤ部２１と第２ギヤ部２２とは、第２軸心Ｘ２回りに一体的に回転するように、第２軸心Ｘ２上に配置された遊星軸４に支持され、キャリヤ３は、遊星軸４を支持する軸支持部３１を備え、軸支持部３１は、遊星軸４が挿入される軸挿入部３２と、遊星軸４における軸挿入部３２に挿入された部分を径方向外側Ｒ２に押圧する弾性部材３３と、を備えている。【選択図】図１