ELECTRIC POWER STEERING DEVICE

To provide an electric power steering device capable of achieving dimensional stability by forming a resin tooth of a driven gear from predetermined environment-friendly polyamide resin composition and capable of concurrently maintaining excellent fatigue resistance and achieving high reliability to...

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Bibliographische Detailangaben
Hauptverfasser:	HONDA SHINTARO, YABE SHUNICHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ENGINEERING ELEMENTS AND UNITS FUELS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS LIGHTING LUBRICANTS LUBRICATING COMPOSITIONS MECHANICAL ENGINEERING METALLURGY MOTOR VEHICLES ORGANIC MACROMOLECULAR COMPOUNDS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE THEIR PREPARATION OR CHEMICAL WORKING-UP THERMAL INSULATION IN GENERAL TRAILERS TRANSPORTING USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WEAPONS
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Beschreibung
Zusammenfassung:	To provide an electric power steering device capable of achieving dimensional stability by forming a resin tooth of a driven gear from predetermined environment-friendly polyamide resin composition and capable of concurrently maintaining excellent fatigue resistance and achieving high reliability together with maintained lubricity by using grease using poly-α-olefin oil as base oil.SOLUTION: An electric power steering device, structured to transmit an auxiliary power by an electric motor 39 to a steering mechanism of a vehicle through a driving gear 11 and a driven gear 9 constituting a reduction gear mechanism 13 and using the driven gear 9 having a resin tooth 3 on an outer-peripheral surface, has the resin tooth 3 constituted of a polyamide resin composition comprised of polyamide 56 resin and reinforcement material with a content of 10-40 wt.%.SELECTED DRAWING: Figure 3 【課題】従動歯車の樹脂歯を、環境にやさしい所定のポリアミド樹脂組成物で形成し、寸法安定性を達成すると共に、優れた耐疲労性を維持し、ポリα-オレフィン油を基油とするグリースを用いても、潤滑性の維持を両立した、高信頼性を有する電動パワーステアリング装置を提供する。【解決手段】電動モータ３９による補助動力を、減速歯車機構１３を構成する駆動歯車１１と従動歯車９を介して車両のステアリング機構に伝達するように構成され、前記従動歯車９が外周面に樹脂歯３を有する電動パワーステアリング装置において、前記樹脂歯３を、ポリアミド５６樹脂と、含有量１０～４０重量％とした強化材と、からなるポリアミド樹脂組成物で形成する。【選択図】図３