Rolled ball screw and method for rolling ball screw groove

Details Rolled ball screw and method for rolling ball screw groove Rolled ball screw and method for rolling ball screw groove

2005-04-19

2005-04-19

Bucci, David A. (Department: 3682)

Machine element or mechanism

Gearing

Directly cooperating gears

C074S424810, C072S083000, C072S098000

Reexamination Certificate

active

06880421

ABSTRACT:
A rolled ball screw has a screw shaft having a ball screw groove so as to engaging with rolling elements of a ball screw, the screw shaft is formed by rolling while a thread rolling die is pressed against a cylindrical bar-shaped member to thereby roll the ball screw groove, wherein the number of waves per circumference per lead of said ball screw groove is set different from the integer multiples of the number of said rolling elements per lead of said ball screw groove.

REFERENCES:
patent: 1989611 (1935-01-01), Dall et al.
patent: 2937547 (1960-05-01), Moeltzner
patent: 4221137 (1980-09-01), Futaba
patent: 6708544 (2004-03-01), Sannomiya

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