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Patent Searching and Data


Title:
BALL SCREW
Document Type and Number:
Japanese Patent JP2005061608
Kind Code:
A
Abstract:

To provide a ball screw capable of preventing the occurrence of a step being caused by the occurrence of vibration to a boundary part between a ball load rolling path and a ball circulation path, without increasing so much precision of fitting-in between a through-hole for scooping up a nut ball or a through-hole for ball return and the cylindrical part of a ball circulation member.

A ball circulating member 17 to circulate a ball 15 has a cylindrical part 21 fitted in each of a through-hole 19 for scooping up a ball bored in a ball circulation member mounting surface 12a of a nut, and a through-hole for ball return. The cylindrical part 21 is provided with a protrusion part 30 engaged with a ball screw groove on the non-load zone side of a nut 12 to position the ball circulation member 17.


Inventors:
HAYASHI EIJI
Application Number:
JP2003000362838
Publication Date:
March 10, 2005
Filing Date:
October 23, 2003
Export Citation:
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Assignee:
NSK LTD
International Classes:
F16H25/22; (IPC1-7): F16H25/22
Attorney, Agent or Firm:
Tetsuya Mori
Yoshiaki Naito
Cui Shu Tetsu