PROBLEM TO BE SOLVED: To provide a planetary roller screw-type linear motion mechanism which can switch a load conversion rate according to an axial load applied to an object from an outer ring member, and can easily finish a cylinder face with which a planetary roller at an external periphery of a rotating shaft contacts by polishing or the like.SOLUTION: In a planetary roller screw-type linear motion mechanism in which an outer ring member 5 moves to an axial line by the engagement of a spiral protrusion 16 of the outer ring member 5 at an internal periphery and a circumferential groove 17 of a planetary roller 13 at an external periphery, a carrier 14 is supported by an elastic member 35 so as to relatively move to a rotating shaft 8 by a reaction force to a rear side in the axial direction, a tapered face 38 which is friction-engaged with the carrier 14 in a state that the carrier 14 does not relatively move to the rotating shaft 8, and releases the friction engagement with the carrier 14 in a state that the carrier 14 relatively moves to the rotating shaft 8 is formed at an external periphery of the rotating shaft 8, and the tapered face 38 is arranged at the rear side in the axial direction with respect to the planetary roller 13.SELECTED DRAWING: Figure 2

    【課題】外輪部材から対象物に負荷する軸方向荷重に応じて荷重変換率を切り替えることが可能であり、しかも、回転軸の外周の遊星ローラが転がり接触する円筒面を研磨等によって容易に仕上げることが可能な遊星ローラねじ式直動機構を提供する。【解決手段】外輪部材5の内周の螺旋凸条16と遊星ローラ13の外周の円周溝17との係合によって外輪部材5が軸方向に移動する遊星ローラねじ式直動機構において、軸方向後方への反力によってキャリア14が回転軸8に対して相対移動するように弾性部材35で支持され、キャリア14が回転軸8に対して相対移動していない状態ではキャリア14と摩擦結合し、キャリア14が回転軸8に対して相対移動した状態ではキャリア14との摩擦結合を解除するテーパ面38が回転軸8の外周に設けられ、テーパ面38は、遊星ローラ13に対して軸方向後方に配置されている。【選択図】図2


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    Titel :

    PLANETARY ROLLER SCREW-TYPE LINEAR MOTION MECHANISM AND ELECTRIC BRAKE DEVICE


    Weitere Titelangaben:

    遊星ローラねじ式直動機構および電動ブレーキ装置


    Beteiligte:

    Erscheinungsdatum :

    2017-12-21


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    F16H Getriebe , GEARING / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen



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