Steering system and method for manufacturing the same

A steering system includes a steering operation shaft, a lower shaft, an upper shaft, and an intermediate shaft. The intermediate shaft includes a tubular member including a hollow portion; and a shaft member. An oil groove that retains lubricating oil is provided in a predetermined range in an axia...

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Bibliographische Detailangaben
Hauptverfasser:	Takimoto, Gaku, Kamitani, Yasunori
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS LIGHTING MECHANICAL ENGINEERING MOTOR VEHICLES PERFORMING OPERATIONS THERMAL INSULATION IN GENERAL TRAILERS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A steering system includes a steering operation shaft, a lower shaft, an upper shaft, and an intermediate shaft. The intermediate shaft includes a tubular member including a hollow portion; and a shaft member. An oil groove that retains lubricating oil is provided in a predetermined range in an axial direction of the intermediate shaft on at least one of an outer peripheral surface of the shaft member at a part housed in the hollow portion and an inner peripheral surface of the hollow portion of the tubular member. A sectional area of the oil groove in an upper shaft-side part of the predetermined range is larger than a sectional area of the oil groove in a lower shaft-side part of the predetermined range, the upper shaft-side part being located on a side of the upper shaft, and the lower shaft-side part being located on a side of the lower shaft.