SCREW SHAFT CIRCULATION TYPE BALL SCREW DEVICE

摘要

PROBLEM TO BE SOLVED: To realize endless circulation of a ball with simple structure without using an externally fitting part such as a circulation top and without using a shielding member, and to reduce costs more.;SOLUTION: In this screw shaft circulation type ball screw device, a screw shaft 2 is provided with a circulation groove 6 forming a closed loop as an endless ball circulation route by communicating between outer screw grooves 1 adjacent to each other in the axial direction. A guide side wall 7 for a ball 5 is provided in both sides of the circulation groove 6 in the cross direction by pressing the circulation groove 6.;COPYRIGHT: (C)2005,JPO&NCIPI