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：US20020039949A1

公开(公告)日：2002-04-04

申请号：US09972234

申请日：2001-10-05

Applicant: NSK Ltd.

Inventor： Hiroyuki Itoh ,  Takashi Imanishi ,  Nobuo Goto ,  Yasuo Murakami ,  Tomonobu Yoshikawa

IPC: F16H015/38

CPC classification number: F16H15/38 ,  F16C19/10 ,  F16C33/585 ,  F16C33/64 ,  F16C2240/54 ,  F16C2361/65 ,  Y02T10/865

Abstract: A power roller bearing of a toroidal-type continuously variable transmission unit that is used for a transmission of an automobile or the like comprises a power roller, an outer race, balls, a retainer, etc. Annular raceway grooves are formed individually on the respective opposite end faces of the outer race and the power roller. Treated-surface layers for enhancing the endurance of the power roller bearing are formed individually on the respective surfaces of the raceway grooves. The treated-surface layers include super-finished surfaces with the surface roughness of 0.05 Ra or less, formed individually on the raceway grooves, and low-friction layers formed individually on the super-finished surfaces. Alternatively, the treated-surface layers include residual compression stress layers formed on the respective surface layer portions of the raceway grooves by shot-peening.

Abstract translation: 用于汽车等的变速器的环形无级变速器单元的动力滚子轴承包括动力辊，外圈，球，保持器等。环形滚道槽分别形成在各自的上方 外圈和动力辊的相对端面。 用于提高动力滚子轴承的耐久性的处理表面层分别形成在滚道槽的各个表面上。 经处理的表面层包括单独形成在滚道槽上的表面粗糙度为0.05Ra以下的超表面，以及分别形成在超表面上的低摩擦层。 或者，经处理的表面层包括通过喷丸处理在轨道槽的各个表面层部分上形成的残余压缩应力层。

公开(公告)号：US20020028033A1

公开(公告)日：2002-03-07

申请号：US09910069

申请日：2001-07-23

Applicant: NSK LTD

Inventor： Hiromichi Takemura ,  Yasuo Murakami

IPC: F16C019/50

CPC classification number: F16H55/36 ,  F16C13/006 ,  F16C2361/63

Abstract: An insulative resin coating film 9 of the range of 10 to 40 nullm thick is formed, by electrodeposition coating, on the outer surface of a pulley 2 inclusive of an outer surface 2E of the iron pulley 2 which is in sliding contact with a belt 3 and an inner surface 2I fit to a rotary shaft 4. With formation of the insulative resin coating film, an electrical resistance after 10 hours of the unit running is 1Mnull or larger. A static electricity caused by a friction between the pulley 2 and the belt 3 is null1kV or lower. As a result, a potential difference between the rolling element and the race ring (outer ring or inner ring) is 1V or lower.

Abstract translation: 在皮带轮2的外表面上形成厚度为10〜40μm的绝缘树脂涂膜9，其中包括与带3滑动接触的铁皮轮2的外表面2E 并且内表面2I与旋转轴4相配合。通过形成绝缘性树脂涂膜，单元运行10小时后的电阻为1MOMEGA以上。 由皮带轮2与皮带3之间的摩擦引起的静电为-1kV以下。 结果，滚动体与座圈（外圈或内圈）之间的电位差为1V以下。

公开(公告)号：US20020121141A1

公开(公告)日：2002-09-05

申请号：US10024708

申请日：2001-12-21

Applicant: NSK LTD.

Inventor： Akihiro Kiuchi ,  Yoichi Matsumoto ,  Yasuo Murakami

IPC: G01N029/00

CPC classification number: F16C33/64 ,  F16C33/585 ,  F16C2240/54 ,  G01N2291/0234 ,  G01N2291/044 ,  G01N2291/2696 ,  Y10S148/906

Abstract: A surface to serve as a surface under ultrasonic inspection has a roughness of 0.4 nullmRa or less, and wherein all imperfections existing a controlled volume X corresponding to all cross sections of a raceway ring 1 assume a length of 0.2 mm or less as represented by the square root of areas of the imperfections. Accordingly, it is possible to provide a rolling bearing which does not become short-lived and obviates a concern about occurrence of cracking even when used in a harsh environment.

Abstract translation: 在超声波检查下用作表面的表面具有0.4mumRa或更小的粗糙度，并且其中存在对应于滚道环1的所有横截面的受控体积X的所有缺陷假定为0.2mm或更小的长度，如 平方根的不完整区域。 因此，可以提供一种不会变得短暂的滚动轴承，即使在恶劣的环境下使用也能够避免出现裂纹的担忧。

公开(公告)号：US20020086767A1

公开(公告)日：2002-07-04

申请号：US09981748

申请日：2001-10-19

Applicant: NSK LTD.

Inventor： Tomonobu Yoshikawa ,  Yasuo Murakami

IPC: F16H015/38

CPC classification number: F16H55/32 ,  F16H15/38 ,  F16H2055/325 ,  Y10S384/912

Abstract: In the thus structured toroidal-type continuously variable transmission, at least one of the concave surface of the input side disk, the concave surface of the output side disk, the convex surfaces of the power rollers, the raceway surfaces of the inner races of the power roller bearings, and the raceway surfaces of the outer races of the power roller bearings is, after heat treatment, subjected to grinding, superfinishing and shot-peening and then superfinishing again, and the resultant surface residual compression stress is in the range from null780 to null1800 MPa.

Abstract translation: 在如此构造的环形无级变速器中，输入侧盘的凹面，输出侧盘的凹面，动力辊的凸面，内圈的内圈的滚道面中的至少一个 动力滚子轴承，动力滚子轴承外圈的滚道表面经热处理后经过研磨，超精加工和喷丸处理，再次进行超精加工，结果表面残余压缩应力范围为 - 780至-1800MPa。

公开(公告)号：US20030181287A1

公开(公告)日：2003-09-25

申请号：US10412798

申请日：2003-04-11

Applicant: NSK Ltd.

Inventor： Hiroyuki Itoh ,  Takashi Imanishi ,  Nobuo Goto ,  Yasuo Murakami ,  Tomonobu Yoshikawa

IPC: F16H015/38

CPC classification number: F16H15/38 ,  F16C19/10 ,  F16C33/585 ,  F16C33/64 ,  F16C2240/54 ,  F16C2361/65 ,  Y02T10/865

Abstract: A power roller bearing of a toroidal-type continuously variable transmission unit that is used for a transmission of an automobile or the like comprises a power roller, an outer race, balls, a retainer, etc. Annular raceway grooves are formed individually on the respective opposite end faces of the outer race and the power roller. Treated-surface layers for enhancing the endurance of the power roller bearing are formed individually on the respective surfaces of the raceway grooves. The treated-surface layers include super-finished surfaces with the surface roughness of 0.05 Ra or less, formed individually on the raceway grooves, and low-friction layers formed individually on the super-finished surfaces. Alternatively, the treated-surface layers include residual compression stress layers formed on the respective surface layer portions of the raceway grooves by shot-peening.

Abstract translation: 用于汽车等的变速器的环形无级变速器单元的动力滚子轴承包括动力辊，外圈，球，保持器等。环形滚道槽分别形成在各自的上方 外圈和动力辊的相对端面。 用于提高动力滚子轴承的耐久性的处理表面层分别形成在滚道槽的各个表面上。 经处理的表面层包括单独形成在滚道槽上的表面粗糙度为0.05Ra以下的超表面，以及分别形成在超表面上的低摩擦层。 或者，经处理的表面层包括通过喷丸处理在轨道槽的各个表面层部分上形成的残余压缩应力层。

公开(公告)号：US20030123770A1

公开(公告)日：2003-07-03

申请号：US10310900

申请日：2002-12-06

Applicant: NSK Ltd.

Inventor： Sinji Fujita ,  Youicih Matsumoto ,  Yasuo Murakami ,  Nobuaki Mitamura ,  Shigeru Okita

IPC: F16C033/58

CPC classification number: F16C33/30 ,  F16C33/62

Abstract: A rolling bearing intended for longer life by improving seizure resistance and wear resistance in the circumstance with slip contact or in the circumstance where lubricant tends to be exhausted, which is manufactured by applying carburization or carbonitridation to an Si-added material to disperse and precipitate carbides or carbonitrides containing Si or SinullX (Xnullone or more of Mn, Mo, and Cr) thereby improving the seizure resistance and the wear resistance by the self-lubrication effect thereof, the size of the carbides or carbonitrides being preferably 10 nullm or less for preventing flaking, and the area ratio for the carbides or carbonitrides being preferably 1.0-30% for obtaining sufficient self-lubrication effect.

Abstract translation: 一种滚动轴承，用于通过在滑移接触的情况下或在润滑剂倾向于排出的情况下改善耐咬合性和耐磨性而延长使用寿命，这是通过对添加Si的材料进行渗碳或碳氮化来制造的，以分散和沉淀碳化物 或含有Si或Si-X的碳氮化物（X = Mn，Mo和Cr中的一种或多种），由此通过其自润滑效果提高耐咬合性和耐磨性，碳化物或碳氮化物的尺寸优选为10μm 以下，为了获得足够的自润滑效果，优选为1.0〜30％的碳化物或碳氮化物的面积比。

公开(公告)号：US20030015262A1

公开(公告)日：2003-01-23

申请号：US10246449

申请日：2002-09-19

Applicant: NSK Ltd.

Inventor： Hiromichi Takemura ,  Yasuo Murakami ,  Youichi Matumoto ,  Seiji Sato

IPC: C21D009/40

CPC classification number: C21D9/40 ,  C22C38/18 ,  C22C38/22 ,  C23C8/18 ,  F16C19/06 ,  F16C33/30 ,  F16C33/62 ,  F16C33/6603 ,  F16C2202/04 ,  F16C2206/42 ,  F16C2240/60 ,  Y10T29/49705 ,  Y10T29/49707

Abstract: In a rolling bearing put under a working circumstance in which water tends to intrude into lubricants, it has been known such a phenomenon that hydrogen ions formed by decomposition of the lubricants are adsorbed to raceway surfaces and accumulated as hydrogen atoms in highly strained sites (in the vicinity of the position for maximum shearing stress), to cause stress corrosion cracking type peeling. The present invention provides a rolling bearing in which an oxide layer of an iron/chromium oxide series is formed at a thickness of from 1 to 1000 nm to at least one of raceway surfaces of bearing rings or rolling contact surfaces of rolling elements and a manufacturing method thereof. The oxide layer can inhibit hydrogen formed by decomposition of water incorporated in the lubricants from intruding into the matrix of the bearing members, thereby preventing early peeling for the raceway surfaces of the bearing rings or the rolling contact surfaces of the rolling elements and, thus, greatly improving the rolling life. The oxide layer can be formed simply by merely tempering the bearing member and then applying a re-heating treatment in air at a temperature lower than the tempering temperature.

Abstract translation: 在滚动轴承处于水倾向于侵入润滑剂的工作环境中的情况下，已经知道这样的现象，即通过润滑剂分解形成的氢离子被吸附在滚道表面上并且作为氢原子聚集在高应变位置（在 最大剪切应力位置附近），引起应力腐蚀开裂型剥离。 本发明提供一种滚动轴承，其中将铁/铬氧化物系列的氧化物层形成为1至1000nm的厚度至滚动元件的轴承圈或滚动接触表面的滚道表面中的至少一个，以及制造 方法。 氧化物层可以抑制由润滑剂中所含的水分解而形成的氢气侵入到轴承部件的基体中，从而防止滚动体的轴承圈或滚动面的滚道表面的早期剥离， 大大提高滚动寿命。 氧化物层可以简单地通过仅回火轴承构件，然后在低于回火温度的温度下在空气中进行再加热处理而形成。

公开(公告)号：US20020082133A1

公开(公告)日：2002-06-27

申请号：US09987080

申请日：2001-11-13

Applicant: NSK LTD.

Inventor： Tomonobu Yoshikawa ,  Yasuo Murakami

IPC: F16H015/38

CPC classification number: F16C33/62 ,  F16C19/10 ,  F16H15/38 ,  F16H55/32

Abstract: The toroidal-type continuously variable transmission comprises an input shaft rotatably supported, an input side disk, an output side disk, a plurality of trunnions, a plurality of power rollers, and a plurality of thrust rolling bearings 32, in which the mutually opposed inner surfaces of the input side and output side disks are respectively formed as concave surfaces each having an arc-shaped section, the peripheral surfaces of the power rollers are formed as spherical-shaped convex surfaces, and the peripheral surfaces of the power rollers are contacted with the inner surfaces of the input side and output side disks. In the thus structured toroidal-type continuously variable transmission, each of the thrust rolling bearings 32 is made of high carbon chromium bearing steel and is also carbonitrided.

Abstract translation: 环形无级变速器包括可旋转地支撑的输入轴，输入侧盘，输出侧盘，多个耳轴，多个动力辊和多个推力滚动轴承32，其中相互相对的内部 输入侧和输出侧盘的表面分别形成为具有弧形部分的凹面，动力辊的周面形成为球形凸面，并且动力辊的周面与 输入侧和输出侧盘的内表面。 在这样构造的环形无级变速器中，每个推力滚动轴承32由高碳铬轴承钢制成，也是碳氮共渗的。

公开(公告)号：US20020046012A1

公开(公告)日：2002-04-18

申请号：US09940510

申请日：2001-08-29

Applicant: NSK LTD

Inventor： Hiromichi Takemura ,  Yasuo Murakami

IPC: G06F017/10

CPC classification number: F16C19/00 ,  G01M13/04 ,  G07C3/00

Abstract: A dynamic equivalent load P is calculated from data information of a rolling bearing. Next, a reliability coefficient a1 is determined, a lubrication parameter aL corresponding to a used lubricant is calculated, and a contamination degree coefficient ac is determined in consideration of a material coefficient. A fatigue limit load Pu is calculated on the basis of the data information. Thereafter, a load parameter null(PnullPu)/Cnullnull1/ac is calculated. On the basis of the lubrication parameter aL and the load parameter null(PnullPu)/Cnullnull1/ac, a life correction coefficient aNSK is calculated with reference to a life correction coefficient calculation map. The bearing life LA is calculated by LAnulla1nullaNSKnull(C/P)p.

Abstract translation: 根据滚动轴承的数据信息计算动态等效载荷P. 接下来，确定可靠性系数a1，计算与所使用的润滑剂对应的润滑参数aL，并且考虑材料系数来确定污染度系数ac。 基于数据信息计算疲劳极限载荷Pu。 此后，计算负载参数{（P-Pu）/ C} .1 / ac。 基于润滑参数aL和负载参数{（P-Pu）/ C} .1 / ac，参考寿命校正系数计算图计算寿命校正系数aNSK。 轴承寿命LA由LA = a1.aNSK计算（C / P）p。