JP2014196824A5

JP2014196824A5 -

Info

Publication number: JP2014196824A5
Application number: JP2014033939A
Authority: JP
Filing date: 2014-02-25
Publication date: 2017-03-23
Anticipated expiration: 2034-02-25

Description

［実施の形態の第６例］
図１０は、請求項１、３に対応する、本発明の実施の形態の第６例を示している。本例の摩擦ローラ式減速機の場合、中間ローラ４ｆの軸方向両側面の中央部に、それぞれが円形の保持凹部６１ａ、６１ａを、互いに同心に形成している。そして、これら各保持凹部６１ａ、６１ａに、前記各中間ローラ４ｆと別体で、内周面にアンギュラ型の外輪軌道６０ａ、６０ａを形成した外輪６２ａ、６２ａを締り嵌めで内嵌している。又、揺動フレーム２８ｄを構成する１対の支持板部４０ｅ、４０ｆの互いに対向する内側面のうちで、前記各保持凹部６１ａ、６１ａに対向する部分に、自転軸７ｄ、７ｄをそれぞれ突設し、これら各自転軸７ｄ、７ｄの先端部外周面に、それぞれアンギュラ型の内輪軌道５８ａ、５８ａを、直接形成している。この様な本例の構造によれば、前述した実施の形態の第４例の様に、中間ローラ４ｄの軸方向両側面に設けた凹部６４、６４の内周面に外輪軌道６０ａ、６０ａを直接形成した場合と比較して、前記各中間ローラ４ｆの製造コストを抑えられる。
その他の部分の構成及び作用は、前述した実施の形態の第１例及び第４例と同様である。 [Sixth Example of Embodiment]
FIG. 10 shows a sixth example of an embodiment of the present invention corresponding to claims 1 and 3. In the case of the friction roller type speed reducer of this example, circular holding recesses 61a and 61a are formed concentrically with each other at the center of both side surfaces in the axial direction of the intermediate roller 4f. Outer rings 62a and 62a having angular outer ring raceways 60a and 60a formed on the inner peripheral surface are fitted into the holding recesses 61a and 61a separately from the intermediate rollers 4f. The rotation shafts 7d and 7d project from the inner surfaces facing each other of the pair of support plate portions 40e and 40f constituting the swing frame 28d at the portions facing the holding recesses 61a and 61a, respectively. The angular inner ring raceways 58a and 58a are directly formed on the outer peripheral surfaces of the tip ends of the rotation shafts 7d and 7d, respectively. According to the structure of this example, the outer ring raceways 60a and 60a are formed on the inner peripheral surfaces of the recesses 64 and 64 provided on both side surfaces in the axial direction of the intermediate roller 4d as in the fourth example of the embodiment described above. Compared to the case of direct formation, the manufacturing cost of each intermediate roller 4f can be suppressed.
The configuration and operation of the other parts are the same as those in the first example and the fourth example of the embodiment described above.