| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw capable of improving productivity, and reducing manufacturing cost. SOLUTION: This ball screw is provided with a screw shaft 2 having a spiral screw groove 4 in an outer circumferential surface, a nut 3 engaged with the screw shaft 2, and having a spiral screw groove in an inner circumferential surface, a plurality of balls contained in a rolling passage formed of both screw grooves facing each other, a return tube 5 exposed in an outer circumferential surface of the nut 3 to compose a ball circulation passage for the balls getting out of the rolling passage to return to the rolling passage, and a tube presser member 6 to fix the return tube 5 to the nut 3. A trunnion shaft part 10 is integrally formed with the tube presser member 6. COPYRIGHT: (C)2004,JPO
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