PROBLEM TO BE SOLVED: To provide a backlash adjustment mechanism capable of reducing backlash of a worm gear even in the state where abrasion of the worm wheel progressed.SOLUTION: A power steering device assists steering force by a driving force of an electric motor M, which is transmitted via a worm gear 10 constituted of a worm shaft 11 and a worm wheel 12, comprises: a slider 37 provided in a gear housing 9 which houses the worm gear so as to move on a flat surface substantially orthogonal to the worm shaft; a first sliding surface 30 provided for an outer peripheral side of ball bearings 25 which are press-fit into the worm shaft; and a second sliding surface 40 which is provided for the slider so as to slide with the first sliding surface, formed in an inclined shape with respect to a moving direction of the slider, and energizes the worm shaft in a direction approaching the worm wheel via a second coil spring 39 along with the sliding with the first sliding surface.SELECTED DRAWING: Figure 5

    【課題】ウォームホイールの摩耗が進行した状態にあってもウォームギヤのバックラッシュを低減し得るバックラッシュ調整機構を提供する。【解決手段】ウォームシャフト11とウォームホイール12により構成されるウォームギヤ10を介して伝達される電動モータMの駆動力をもって操舵力を補助するパワーステアリング装置において、ウォームシャフトとほぼ直交する平面上を移動するようにウォームギヤを収容するギヤハウジング9内に設けられたスライダ37と、ウォームシャフトに圧入されたボールベアリング25の外周側に設けられた第1摺動面30と、第1摺動面と摺動するようにスライダに設けられ、スライダの移動方向に対して傾斜状に形成されると共に、第1摺動面との摺動に伴って、ウォームシャフトをウォームホイールに近づく方向へ第2コイルばね39を介して付勢する第2摺動面40と、を備えた。【選択図】図5


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    Title :

    BACKLASH ADJUSTMENT MECHANISM, AND POWER STEERING DEVICE USING THE SAME


    Additional title:

    バックラッシュ調整機構及びこれを用いたパワーステアリング装置


    Contributors:

    Publication date :

    2016-04-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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