公开(公告)号：US20030221502A1

公开(公告)日：2003-12-04

申请号：US10411329

申请日：2003-04-11

Applicant: NSK LTD.

Inventor： Shigeru Okita ,  Hideyuki Uyama ,  Susumu Tanaka ,  Kenichi Iso

IPC: F16H025/22

CPC classification number: F16C33/3706 ,  F16C29/06 ,  F16C33/32 ,  F16H25/2238 ,  F16H2025/2242 ,  F16H2025/249 ,  Y10T74/19777

Abstract: A ball screw (1) as a linear motion device according to the invention has retaining pieces (21) each having two concave surfaces (23) facing adjacent ones of rolling elements (9) respectively. Each of the retaining pieces (21) is disposed between adjacent ones of the rolling elements (9). A carbonitrided layer containing residual austenite of 15-40% by volume is provided in the surface layer of each of the rolling elements (9).

Abstract translation: 作为根据本发明的直线运动装置的滚珠丝杠（1）具有分别具有面向相邻滚动体（9）的两个凹面（23）的保持片（21）。 每个保持片（21）设置在相邻的滚动元件（9）之间。 在各滚动体（9）的表面层设置含有15〜40体积％的残留奥氏体的碳氮共渗层。

公开(公告)号：US20040005103A1

公开(公告)日：2004-01-08

申请号：US10414308

申请日：2003-04-16

Applicant: NSK LTD.

Inventor： Susumu Tanaka ,  Shinji Fujita ,  Hideyuki Uyama ,  Nobuaki Mitamura

IPC: F16C033/32 ,  F16C033/62 ,  F16C033/58

CPC classification number: F16C33/64 ,  C21D9/36 ,  C21D9/40 ,  C22C38/04 ,  C22C38/18 ,  C23C8/20 ,  C23C8/30 ,  F16C33/32 ,  F16C2204/64 ,  F16C2240/54 ,  F16C2240/76 ,  F16C2361/63 ,  F16C2361/65 ,  Y10S384/913

Abstract: A rolling bearing has the radius of curvature of the raceway on an inner ring and an outer ring is from not smaller than 50.1% to not greater than 51.9% of the diameter of the balls, and at least one of the compositions of the bearing is obtained by forming an alloy steel having a carbon (C) content of from not smaller than 0.50% to not greater than 0.90%, a chromium (Cr) content of from not smaller than 3.0% to not greater than 15.0%, a manganese (Mn) content of from not smaller than 0.10% to not greater than 2.0%, a silicon (Si) content of from not smaller than 0.10% to not greater than 2.0%, a molybdenum (Mo) content of zero or not greater than 2.0% by weight, and a vanadium (V) content of zero or not greater than 2.0%, by weight.

Abstract translation: 滚动轴承在内圈上具有滚道的曲率半径，外圈的直径不小于球的直径的50.1％至不大于51.9％，并且轴承的组成中的至少一种为 通过形成碳（C）含量为0.50〜0.90％以下，铬（Cr）含量为3.0％以上且15.0以下的合金钢，得到的锰（ Mn）含量为0.10％以上且2.0％以下，硅（Si）含量为0.10％以上且2.0％以下，钼（Mo）含量为0以上且2.0以下 重量％，钒（V）含量为零或不大于2.0％（重量）。