Ball screw device having lubricating structure

Details Ball screw device having lubricating structure Ball screw device having lubricating structure

2007-06-26

2007-06-26

Ridley, Richard (Department: 3682)

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

C074S424830, C074S424870

Reexamination Certificate

active

11274568

ABSTRACT:
A ball screw device includes a ball nut having an inner thread formed by a number of helical groove portions, a screw shaft having an outer thread formed by a number of helical groove portions, for threading with the inner thread of the ball nut, and a number of rolling members engaged in the helical groove portions of the ball nut and the screw shaft, for facilitating a movement of the ball nut relative to the screw shaft. One or more guide members are engaged in the helical groove portions of the screw shaft, and each has an oil retaining member for suitably absorbing oil and for continuously applying the oil onto the screw shaft. A tube may couple two of the helical groove portions of the ball nut together, to form an endless ball rolling passage and to receive the rolling members.

REFERENCES:
patent: 2979071 (1961-04-01), Herring et al.
patent: 3661030 (1972-05-01), Gagne
patent: 5014568 (1991-05-01), Schlenker
patent: 5168767 (1992-12-01), Morita
patent: 6023991 (2000-02-01), Yabe et al.
patent: 6216821 (2001-04-01), Namimatsu et al.
patent: 6247556 (2001-06-01), Chen
patent: 6451744 (2002-09-01), Chang
patent: 2005/0252324 (2005-11-01), Kato et al.

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