PROBLEM TO BE SOLVED: To provide a power steering device which adjusts a preload between a worm and a worm wheel to a desired value regardless of manufacturing errors and assembly errors etc., and to provide a preload adjustment method.SOLUTION: A power steering device includes: a worm 130 driven by an assist motor 140; a worm wheel 120 rotatably attached to a pinion shaft 114 and meshed with the worm 130; a housing 20; a plug 23 having a male screw 24, which is configured to threadedly engage with a female screw 25 formed in the housing 20, on an outer peripheral surface; and an elastic member 50 in which one end is supported by the worm 130 and the other end is supported by the plug 23 in a biasing direction, the elastic member 50 configured to apply a preload to an area between the worm 130 and the worm wheel 120. The power steering device includes plug fixing means 80 which fixes the plug 23, which is positioned at a given screw tightening position so as to obtain a desired preload, to the housing 20 so that the plug 23 does not rotate relative to the housing 20.SELECTED DRAWING: Figure 2
【課題】製造誤差や組み付け誤差等に拘りなく、ウォームとウォームホイールとの間の予圧を所望の値に調整可能なパワーステアリング装置およびその予圧調整方法を提供する。【解決手段】アシスト用モータ140により駆動されるウォーム130と、ピニオン軸114に軸着され、ウォーム130に噛合するウォームホイール120と、ハウジング20と、ハウジング20に形成された雌ねじ25に螺合する雄ねじ24を外周面に有したプラグ23と、付勢方向において一端がウォーム130に支持され他端がプラグ23に支持されて、ウォーム130とウォームホイール120との間に予圧を付与する弾性部材50と、を備えたパワーステアリング装置であって、所望の予圧が得られるように任意のねじ締め位置に位置調整されたプラグ23を、ハウジング20に対し回転不能に固定するプラグ固定手段80を備える。【選択図】図2
POWER STEERING DEVICE AND PRELOAD ADJUSTMENT METHOD OF THE SAME
パワーステアリング装置およびその予圧調整方法
07.07.2016
Patent
Elektronische Ressource
Japanisch
Power steering apparatus and preload adjustment method thereof
Europäisches Patentamt | 2016
|POWER STEERING APPARATUS AND PRELOAD ADJUSTMENT METHOD THEREOF
Europäisches Patentamt | 2016
|Power steering apparatus and preload adjustment method thereof
Europäisches Patentamt | 2016
|Clearance and preload adjustment for steering mechanism using piezoelectric elements
Europäisches Patentamt | 2020
|