To stably secure engagement accuracy of a worm 2 and a worm wheel 1.SOLUTION: A backlash adjustment mechanism 30 includes: a holder 31 which holds a second bearing 11 rotatably supporting a tip side of the worm 2; and a spring 70 which biases the second bearing 11 in a direction in which the worm 2 and the worm wheel 1 are engaged. The holder 31 has a first holder 40 and a second holder 60. The second holder 60 has guide parts 62 which support an outer peripheral surface of the second bearing 11 and guide the movement of the second bearing 11 to the worm wheel 1. The guide part 62 has a planar guide surface 160 including a slide area 161 in which the second bearing 11 slides. On each guide surface 160, a protrusion 169 protruding to the second bearing 11 is provided along a direction intersecting with a biasing direction of the spring 70. The protrusion 169 is located at the outer side of the slide area 161.SELECTED DRAWING: Figure 14

    【課題】ウォーム2とウォームホイール1との噛み合い精度を安定して確保する。【解決手段】バックラッシ調整機構30は、ウォーム2の先端側を回転自在に支持する第2軸受11を保持するホルダ31と、第2軸受11をウォーム2とウォームホイール1とが噛み合う方向へ付勢するスプリング70と、を備える。ホルダ31は、第1ホルダ40と第2ホルダ60とを有する。第2ホルダ60は、第2軸受11の外周面を支持し、ウォームホイール1へ向かう第2軸受11の移動を案内するガイド部62を有する。ガイド部62は、第2軸受11が摺動する摺動領域161を含む平面状の案内面160を有する。案内面160には、スプリング70の付勢方向に交差する方向に沿って、第2軸受11に向かって突出する突条169が設けられ、この突条169は、摺動領域161の外側に位置している。【選択図】図14


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    Title :

    BACKLASH ADJUSTMENT MECHANISM AND POWER STEERING DEVICE INCLUDING THE SAME


    Additional title:

    バックラッシ調整機構及びこれを備えるパワーステアリング装置


    Contributors:

    Publication date :

    2019-12-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16H Getriebe , GEARING / B62D MOTOR VEHICLES , Motorfahrzeuge / F16C SHAFTS , Wellen



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