MOVEMENT GUIDE DEVICE, BALL SCREW, AND METHOD OF PRODUCING BALL RACEWAY GROOVE

WIPO Patent Application WO/2004/044444

A1

A movement guide device whose load capacity is increased without nearing a curvature radius of ball rolling grooves to a radius of balls. Ball rolling grooves are formed in a raceway rail and moving block of a linear guide, the ball rolling grooves serving as raceways where balls interposed between a raceway member and a moving member roll. Elastically deformable lines of ridges extending in the direction in which the ball rolling grooves extend are formed in the vicinity of contact points of the ball rolling grooves with which points the balls are in contact. This results that the balls and the lines of ridges are in contact by a load acting on the balls. The load to the balls is distributed to each point of the ridges so that high stress concentration at a specific point can be prevented from occurring. As a result, load capacity of the device can be increased without nearing a curvature radius of ball rolling grooves to a radius of the balls.

WO/1983/002418	METHOD OF MANUFACTURING BEARING UNIT FOR AUTOMOBILE WHEEL
JP5895360	Manufacturing method of outer ring for bearing

SHIRAI TAKEKI
TACHIKAKE YUUJI

PCT/JP2003/014253

May 27, 2004

November 10, 2003

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THK CO LTD (JP)

B24B19/06; F16C19/06; F16C19/16; F16C19/50; F16C29/00; F16C29/04; F16C29/06; F16C31/04; F16C33/58; F16C33/64; F16H25/22; (IPC1-7): F16C33/58; B24B5/04; F16C29/06; F16C33/64; F16H25/22

JPH0647729U	1994-06-28
JP2002276765A	2002-09-25
JPH0388653U	1991-09-10
JPH03107518U	1991-11-06
JP2002039190A	2002-02-06

Ishikawa, Yasuo (17-11 Shiba 2-chom, Minato-ku Tokyo, JP)

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