Method for producing threaded shaft for power steering device, and power steering device

Provided is a power steering device comprising a rack shaft (7) obtained by joining a first member on which rack teeth are formed and a second member (7b) serving as a ball screw shaft on which a shaft-side ball screw groove (42a) is formed, wherein: the shaft-side ball screw groove (42a) is ground...

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Bibliographische Detailangaben
Hauptverfasser:	YOSHIDA OSAMU, KAGAMI KENJI, ABE MITSUAKI, SATO ATSUSHI, KITAMURA KEISUKE, YONEZAWA TETSUYA, MARUYAMA TATSUYOSHI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING DRESSING OR CONDITIONING OF ABRADING SURFACES ENGINEERING ELEMENTS AND UNITS FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GRINDING HEATING LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS LIGHTING MACHINE TOOLS MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR MOTOR VEHICLES PERFORMING OPERATIONS POLISHING THERMAL INSULATION IN GENERAL THREAD CUTTING TRAILERS TRANSPORTING WEAPONS WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTIONTHEREWITH
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Beschreibung
Zusammenfassung:	Provided is a power steering device comprising a rack shaft (7) obtained by joining a first member on which rack teeth are formed and a second member (7b) serving as a ball screw shaft on which a shaft-side ball screw groove (42a) is formed, wherein: the shaft-side ball screw groove (42a) is ground into the second member (7b) by having a grindstone (51) spin and revolve around the second member (7b) while causing the second member (7b) to spin about an axis (Z) thereof as the axis of rotation so as to fulfill a machining condition 'g/(5*p) < w < g/p', where w is the rotational speed of the second member (7b) during the grinding of the shaft-side ball screw groove (42a), g is the rotational speed of the grindstone (51) during the grinding of the shaft-side ball screw groove (42a), and p isthe length of one circumference around the axis of rotation of the shaft-side ball screw groove (42a). 动力转向装置具有齿条轴(7)，所述齿条轴是将形成有齿条齿的第部件与形成有轴侧滚珠丝杠槽(42a)的作为滚珠丝杠轴的第二部件(7b)接合而成的，在将磨削轴侧滚珠丝杠槽(42a)时的第二部件(7b)的旋转速度设为w，将磨削轴侧滚珠丝杠槽(42a)时