PROBLEM TO BE SOLVED: To obtain a structure which can further effectively suppress the generation of tooth hammering noise at an engagement part between wheel teeth and worm teeth.SOLUTION: An inside-diameter side cam part 31 which becomes large as an outside diameter progresses toward one side in a peripheral direction is arranged at a portion located at a side opposite to a worm wheel side with respect to a radial direction out of an external peripheral face of an inside-diameter side holder 25, and an outside-diameter side cam part whose inside diameter becomes large as progressing toward one side in the peripheral direction, and in which a curvature radius of the inside diameter is smaller than a curvature radius of an outside diameter of the inside-diameter side cam part 31 is arranged at a portion opposing the inside-diameter side cam part 31 out of an internal peripheral face of the outside-diameter side holder 26. Then, the inside-diameter side holder 25 is elastically pressed against the outside-diameter side holder 26 in a direction in which the inside-diameter side holder is rotated toward the other side in the peripheral direction by an elastic force of a torsion coil spring 28.SELECTED DRAWING: Figure 8

    【課題】ホイール歯とウォーム歯との噛合部での歯打ち音の発生をより効果的に抑える事ができる構造を実現する。【解決手段】内径側ホルダ25の外周面のうち、径方向に関してウォームホイール側と反対側に位置する部分に、外径が周方向一方に向かう程大きくなる内径側カム部31を設け、外径側ホルダ26の内周面のうち、この内径側カム部31に対向する部分に、周方向一方に向かう程内径が大きくなり、且つ、この内径の曲率がこの内径側カム部31の外径の曲率よりも小さい外径側カム部を設ける。そして、捩りコイルばね28の弾力により、前記内径側ホルダ25を前記外径側ホルダ26に対し、周方向他側に向けて回転させる方向に弾性的に押圧する。【選択図】図8


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    Title :

    WORM REDUCTION GEAR


    Additional title:

    ウォーム減速機


    Contributors:
    SEGAWA TORU (author) / MURATA RYOTA (author)

    Publication date :

    2018-08-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16H Getriebe , GEARING / B62D MOTOR VEHICLES , Motorfahrzeuge



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