公开(公告)号：US20020037120A1

公开(公告)日：2002-03-28

申请号：US09867636

申请日：2001-05-31

Applicant: NSK LTD.

Inventor： Susumu Tanaka ,  Hiroyuki Ito

IPC: F16C033/32 ,  F16C033/62 ,  F16C033/34

CPC classification number: C23C8/32 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  C23C8/22 ,  C23C8/34 ,  C23C22/24 ,  C23C22/50 ,  F16C33/62 ,  Y10S148/906 ,  Y10S384/912 ,  Y10S428/926

Abstract: The material of inner ring, outer ring and rolling element is formed by a steel material having a chromium (Cr) content of 5% by weight or more. The material is then subjected to cutting. Thereafter, the material thus cut is subjected to heat treatment so that the surface hardness HRC of the worked material is 58 or more. Subsequently, the worked material is subjected to grinding. A working denatured layer present on the surface of the worked material is then removed. Subsequently, an oxide film comprising chromium atom and iron atom at a ratio (Cr/Fe) of 0.5 or more is formed on the surface of the worked material. Accordingly, it is possible to provide a rolling bearing excellent in corrosion resistance and fretting resistance.

Abstract translation: 内圈，外圈和滚动体的材料由铬（Cr）含量为5重量％以上的钢材形成。 然后对材料进行切割。 然后，将如此切割的材料进行热处理，使得加工材料的表面硬度HRC为58以上。 随后，对被加工材料进行研磨。 然后去除存在于加工材料表面上的工作变性层。 随后，在加工材料的表面上形成包含铬原子和铁原子的比例（Cr / Fe）为0.5以上的氧化膜。 因此，可以提供耐腐蚀性和耐磨性优异的滚动轴承。

公开(公告)号：US20010048781A1

公开(公告)日：2001-12-06

申请号：US09864455

申请日：2001-05-25

Applicant: NSK LTD.

Inventor： Hisashi Kawamura ,  Yukio Ohura ,  Manabu Ohori ,  Susumu Tanaka

IPC: F16C033/58

CPC classification number: F16C33/4629 ,  F16C33/3806 ,  F16C33/385 ,  F16C33/4605 ,  F16C33/64 ,  F16C2326/43 ,  F16C2360/23 ,  F16C2361/61

Abstract: A fine nitride layer comprising a compound layer and a diffusion hardened layer of hardness being Hv900 or higher is formed, through a low temperature nitriding method at temperature in the range of 300 to 400null C., in a guiding part. The guiding part guides the circumferential surfaces of retainers 7a to 7c and is formed at any one part of inner ring raceways 3a to 3c and outer ring raceways 4a to 4c as well as the inner circumferential surfaces of the outer rings 5a to 5c, to thereby realize such rolling bearings at low cost, having excellent abrasion resistance, and good corrosion resistance, if needed.

Abstract translation: 在引导部分中，通过低温氮化法在300〜400℃的温度范围内形成包含化合物层和硬度为Hv900以上的扩散硬化层的细小氮化物层。 引导部分引导保持器7a至7c的圆周表面，并且形成在内圈滚道3a至3c和外圈滚道4a至4c以及外圈5a至5c的内圆周表面的任何一部分上，从而 实现这种低成本的滚动轴承，具有优异的耐磨性，并且如果需要，具有良好的耐腐蚀性。

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：US20030219178A1

公开(公告)日：2003-11-27

申请号：US10410342

申请日：2003-04-10

Applicant: NSK LTD.

Inventor： Susumu Tanaka ,  Nobuaki Mitamura ,  Hiromichi Takemura ,  Yoshitaka Hayashi ,  Yasuo Murakami

IPC: F16C019/00 ,  F16C033/00

CPC classification number: F16C33/62 ,  C21D9/36 ,  C21D9/40 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  F16C33/30 ,  F16C33/6688 ,  F16C2361/63 ,  F16C2361/65 ,  Y10S148/906 ,  Y10S384/912

Abstract: A rolling bearing for belt-type continuously variable transmission with a metal belt including pieces has an inner ring; an outer ring; and rolling elements, wherein at least one of the inner ring, the outer ring and the rolling element is made of an iron alloy having a chromium content of from 2.5 to 20.0% by weight.

Abstract translation: 带式无级变速器用滚动轴承，带金属带包括内圈; 外圈; 和滚动元件，其中内圈，外圈和滚动元件中的至少一个由铬含量为2.5至20.0重量％的铁合金制成。

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）。

公开(公告)号：US20020064326A1

公开(公告)日：2002-05-30

申请号：US09940609

申请日：2001-08-29

Applicant: NSK LTD.

Inventor： Susumu Tanaka

IPC: F16C033/32

CPC classification number: F16C33/62

Abstract: In a rolling bearing 1 comprising an outer ring 2, an inner ring 3, and a plurality of rolling elements 4 rollably provided interposed between the outer ring 2 and the inner ring 3, the outer ring 2 and the inner ring 3 are formed by an austenite-based stainless steel. Further, the outer ring 2 and the inner ring 3 are subjected to plastication attaining a percent area reduction of equal or more than 25% to have a surface hardness HRC of equal or more than 35.

Abstract translation: 在外圈2和内圈3之间设置有包围外圈2，内圈3以及可滚动地设置的多个滚动体4的滚动轴承1中，外圈2和内圈3由 奥氏体不锈钢。 而且，外圈2和内圈3的表面硬度HRC等于或大于35，进行达到等于或大于25％的百分比面积减小的塑化。

公开(公告)号：US20020061150A1

公开(公告)日：2002-05-23

申请号：US09983914

申请日：2001-10-26

Applicant: NSK LTD.

Inventor： Kiyotoshi Ueda ,  Yukio Ohura ,  Susumu Tanaka

IPC: F16C033/62

CPC classification number: F16C33/62 ,  F16C33/32 ,  F16C2240/54 ,  F16C2326/47

Abstract: To provide a rolling bearing for a man-made satellite which is free from the damages, e.g., formation of the band mark on the surfaces of the rolling elements, and the losing of the luster of the surfaces thereof. There is provided a rolling bearing, which is used mainly for a man-made satellite, includes an outer ring, an inner ring, and rolling elements. The parent material of those components is martensitic stainless steel. Of those components, at least the rolling elements are processed to have nitride surface layers formed over their surfaces. A hardness of the nitride surface layer is Hv1200 to 1500.

Abstract translation: 提供一种人造卫星的滚动轴承，其不受损伤，例如在滚动体的表面上形成带状物，以及其表面光泽的丧失。 提供了主要用于人造卫星的滚动轴承，包括外圈，内圈和滚动元件。 这些部件的母材是马氏体不锈钢。 在这些部件中，至少滚动元件被加工成在其表面上形成有氮化物表面层。 氮化物表面层的硬度为Hv1200〜1500。