WO2020196342A1 - 円すいころ軸受 - Google Patents
円すいころ軸受 Download PDFInfo
- Publication number
- WO2020196342A1 WO2020196342A1 PCT/JP2020/012520 JP2020012520W WO2020196342A1 WO 2020196342 A1 WO2020196342 A1 WO 2020196342A1 JP 2020012520 W JP2020012520 W JP 2020012520W WO 2020196342 A1 WO2020196342 A1 WO 2020196342A1
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- WIPO (PCT)
- Prior art keywords
- tapered roller
- roller bearing
- tapered
- rolling
- side end
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
- F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
- F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
- F16C33/363—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces with grooves in the bearing-surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
- F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
- F16C33/366—Tapered rollers, i.e. rollers generally shaped as truncated cones
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/664—Retaining the liquid in or near the bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/02—Mechanical properties
- F16C2202/04—Hardness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/02—Mechanical treatment, e.g. finishing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/54—Surface roughness
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H48/42—Constructional details characterised by features of the input shafts, e.g. mounting of drive gears thereon
- F16H2048/423—Constructional details characterised by features of the input shafts, e.g. mounting of drive gears thereon characterised by bearing arrangement
Definitions
- the present invention relates to tapered roller bearings, and more particularly to tapered roller bearings used in vehicle transmissions and differentials.
- innumerable independent micro-concave-shaped dents are randomly formed on at least one of the surface of the rolling element or the raceway surface of the raceway ring to form a smooth smooth surface other than the dents.
- the area ratio of the dent is 14% or more and 21% or less
- the average area is 10 ⁇ m 2 or more and 30 ⁇ m 2 or less
- the maximum area is 300 ⁇ m 2 or more and 500 ⁇ m 2 or less
- the volume of the dent Specifies that it is 0.007 mm 3 / cm 2 or more and 0.010 mm 3 / cm 2 or less.
- the roller coefficient ⁇ is increased to 0.94 by reducing the roller pitch diameter, and innumerable small concave dents are randomly provided on the surface of the tapered roller.
- the surface roughness parameter Ryni of the surface provided with the recess is 0.4 ⁇ m ⁇ Ryni ⁇ 1.0 ⁇ m, the Sk value is ⁇ 1.6 or less, and the cage is made into a specific shape.
- the rolling contact portion between the rolling surface of the tapered roller and the raceway surface of the raceway ring is under dilute lubrication or has a low lubricating oil. It is considered that surface damage such as peeling can be suppressed by improving the oil film forming property of the rolling contact portion even if the viscosity is increased.
- the large-diameter side end face of the tapered roller and the large bearing portion the large-diameter side end face of the tapered roller has large irregularities, which is more than the effect of improving the oil film formability by improving the lubricating oil retention.
- the bearing rotation torque may be deteriorated or seizure may occur due to the increase in friction.
- the sliding contact portion between the large diameter side end face of the tapered roller and the large flange portion is not considered.
- the present invention defines the surface texture of tapered rollers by using parameters that more accurately indicate the surface properties of the tapered rollers, so that the surface damage at the rolling contact portion is not deteriorated under dilute lubrication or when the viscosity of the lubricating oil is reduced. It is an object of the present invention to provide a tapered roller bearing capable of both suppressing deterioration of bearing rotation torque and deterioration of seizure property of a sliding contact portion.
- a tapered roller bearing including a plurality of tapered rollers rotatably arranged between the inner ring and the outer ring.
- the surface roughness of at least the rolling surface and the large-diameter side end surface of each tapered roller is 0.02 to 0.17 ⁇ m for the protruding peak height Rpk and 0.12 to 0.21 ⁇ m for the core level difference Rk.
- a tapered roller bearing having a protruding valley height Rvk of 0.07 to 0.43 ⁇ m and an average area of recesses of 5 ⁇ m 2 or less in fine irregularities existing on the surface of the tapered rollers.
- the surface of each tapered roller is finished by barrel processing.
- the tapered roller bearing according to (1) wherein the hardness of the polar surface on the surface is 105% to 135% of the hardness of the surface before barrel processing.
- the average area of the recesses is as small as 5 ⁇ m 2 or less, at least as the surface texture of the rolling surface and the large-diameter side end surface, and Rpk, Rk, and Rvk are finer than defined in the above specific range.
- FIG. 1 It is sectional drawing which shows an example of a tapered roller bearing.
- (A) shows the three-dimensional surface roughness of the surface of the rolling surface of the tapered roller after grinding and finishing, and (b) is a polar coordinate graph showing the three-dimensional surface roughness by an angular spectrum.
- (A) shows the three-dimensional surface roughness of the surface of the rolling surface of the tapered roller after barrel processing, and (b) is a polar coordinate graph showing the three-dimensional surface roughness by an angular spectrum. It is a graph which shows the result of test 1. It is a graph which shows the result of the test 2. It is a graph which shows the result of the test 3.
- the tapered roller bearing 10 of the present embodiment is applied to a transmission or a differential of a vehicle used in a lubrication environment having poor oil film forming property such as dilute lubrication and low viscosity of lubricating oil.
- the tapered roller bearing 10 is rollable between an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, and an outer ring raceway surface 11a and an inner ring raceway surface 12a.
- a plurality of tapered rollers 13 arranged in the above and a cage 14 for holding the plurality of tapered rollers 13 at equal intervals in the circumferential direction are provided.
- the inner ring 12 has a small collar portion 15 provided at the small diameter side end portion of the inner ring raceway surface 12a, and a large collar portion 16 provided at the large diameter side end portion of the inner ring raceway surface 12a.
- the small flange portion 15 comes into contact with the small diameter side end surface 13a of the tapered roller 13, and the large flange portion 16 comes into contact with the large diameter side end surface 13b of the tapered roller 13.
- FIG. 2A shows the three-dimensional surface roughness measured by a three-dimensional surface roughness measuring instrument on the surface of the rolling surface 13c of the conical roller 13 immediately after the grinding finish
- FIG. 2B shows the three-dimensional surface roughness.
- the polar coordinate graph and the angle spectrum are defined in ISO 25178. In such streaky processing marks, the valleys are aligned in one direction, and the holding capacity of the lubricating oil is low.
- the entire surface including the rolling surface 13c, the small diameter side end surface 13a, and the large diameter side end surface 13b of each tapered roller 13 is subjected to barrel processing to give directionality to the entire surface. No, it forms a large number of fine irregularities specified below.
- the rolling surface 13c and the large diameter side end surface 13b of the tapered roller 13 are (A) The height Rpk of the protruding ridge is 0.02 to 0.17 ⁇ m, preferably 0.03 to 0.10 ⁇ m. (B) The level difference Rk of the core portion is 0.12 to 0.21 ⁇ m, preferably 0.12 to 0.19 ⁇ m.
- the height Rvk of the protruding valley is 0.07 to 0.43 ⁇ m, preferably 0.17 to 0.41 ⁇ m.
- the average area of the recesses is 5 ⁇ m 2 or less, preferably 1 ⁇ m 2 or less, and more preferably 0.8 ⁇ m 2 or less.
- Rpk, Rk, and Rvk are specified in ISO 13565-1 (JIS B 067-1-2).
- the average area of the recesses is the area of the tapered rollers 13 at the outermost surface position.
- the rolling surface 13c of the tapered roller 13 and the raceway surface 11a of the outer ring 11 or the inner ring 12 can be used even under dilute lubrication or to reduce the viscosity of the lubricating oil.
- Surface damage due to oil film breakage at the rolling contact portion with 12a can be suppressed, and bearing rotation torque and seizure deterioration of the sliding contact portion between the large diameter side end surface 13b of the tapered roller 13 and the large flange portion 16 are deteriorated. It can be suppressed, a good lubrication state can be maintained at each contact portion, and a tapered roller bearing 10 having a long life can be obtained.
- the hardness of the polar surface of the tapered roller 13 can be increased by barrel processing.
- the hardness of the polar surface after barrel processing varies depending on the steel type and heat treatment, but in the present embodiment, it is 105% to 135%, preferably 110 to 120% higher than that before barrel processing.
- the life can be improved by increasing the hardness of the polar surface.
- the polar surface refers to a portion having a depth of up to 5 ⁇ m from the surface, and the hardness of the polar surface is the hardness when measured with a micro Vickers hardness measuring machine at a test force of 100 g.
- the three-dimensional surface roughness as shown in FIG. 3A and FIG. 3 A polar coordinate graph as shown in (b) can be obtained.
- the entire surface of the tapered roller 13 after barrel processing, including the rolling surface 13c, the small-diameter side end surface 13a, and the large-diameter side end surface 13b, is a non-directional surface (isotropic surface), and almost all of them.
- the angular spectrum is dispersed in the direction of. Further, it can be said that the peak height of the angle spectrum does not become particularly high only at a specific angle, and the unevenness is uniformly distributed in almost all directions.
- the surface texture aspect ratio Str defined by ISO 25178 is known. This Str is in the range of 0 to 1, and the closer it is to 1, the higher the "isotropy" is.
- the aspect ratio Str of the surface textures of the surfaces 13a, 13b, and 13c of the tapered rollers 13 is preferably 0.2 or more, more preferably 0.5 or more, and 0.7 or more. It is particularly preferable to have. If the Str is less than 0.2, the isotropic property of the unevenness is insufficient, the holding ability of the lubricating oil due to the unevenness is not sufficient, and the effect of improving the durability may not be sufficiently obtained.
- the effects of the present invention were confirmed by Tests 1 to 3 using Conventional Examples, Examples and Reference Examples.
- the steel material (SUJ2) was subjected to plastic working, grinding, and grinding to produce tapered rollers of a tapered roller bearing.
- the tapered rollers of the conventional example were further subjected to barrel processing to obtain the surface texture shown in Table 1.
- the tapered rollers of the conventional example were barrel-processed under conditions different from those of the examples to obtain the surface texture shown in Table 1.
- the number n of tapered rollers is set to 30, and Rpk, Rk, and Rvk represent the minimum and maximum values of n tapered rollers.
- Test 1 Low-viscosity oil (assumed to be ISO VG10 to VG15) is supplied as lubricating oil to the tapered roller bearings using each tapered roller of the conventional example and the embodiment in the same supply amount, and a durability test assuming dilute lubrication conditions is performed. went. In the durability test, a dynamic equivalent load of about 20000 N was applied, the bearing was rotated at a rotation speed of 4000 min -1 , and the rotation time until an abnormality occurred was measured.
- the seizure life was almost the same in both the conventional example and the example, but in the reference example, it was reduced to about 1/4 of these. It is probable that this is because the fine unevenness is larger in the reference example than in the example, and the heat generation is increased due to the increased friction between the large diameter side end face and the large collar portion.
- each surface texture has a protruding peak height Rpk of 0.02 to 0.17 ⁇ m, a core level difference Rk of 0.12 to 0.21 ⁇ m, and a protruding valley height Rvk of 0. It is good to use tapered roller bearings with a plurality of tapered rollers, which are 07 to 0.43 ⁇ m and have an average area of recesses of 0.8 ⁇ m 2 or less in the fine irregularities existing on the surface of the tapered rollers. It was confirmed that excellent durability, seizure resistance, and torque performance can be obtained.
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Abstract
Description
また、特許文献2に記載の円すいころ軸受においても、円すいころの大径側端面と大鍔部との間の滑り接触部分について考慮されていない。
(1) 内輪及び外輪と、
該内輪及び外輪間に転動自在に配置される複数の円すいころと、を備える円すいころ軸受であって、
前記各円すいころの、少なくとも転動面及び大径側端面の表面粗さは、突出山部高さRpkが0.02~0.17μm、コア部のレベル差Rkが0.12~0.21μm、突出谷部高さRvkが0.07~0.43μmであり、該円すいころの表面に存在する微細な凹凸における、凹部の平均面積が5μm2以下である、円すいころ軸受。
(2) 前記各円すいころの表面はバレル加工によって仕上げ加工されており、
前記表面における、極表面の硬さは、前記バレル加工前の表面に対して、105%~135%の硬さを有する、(1)に記載の円すいころ軸受。
(3) 前記各円すいころの表面性状のアスペクト比Strが0.2以上である、(1)又は(2)に記載の円すいころ軸受。
(a)突出山部高さRpkを0.02~0.17μm、好ましくは0.03~0.10μm
(b)コア部のレベル差Rkを0.12~0.21μm、好ましくは0.12~0.19μm
(c)突出谷部高さRvkを0.07~0.43μm、好ましくは0.17~0.41μm
(d)凹部の平均面積を5μm2以下、好ましくは1μm2以下、より好ましくは0.8μm2以下
とする。なお、Rpk、Rk、Rvkは、ISO 13565-1(JIS B 0671-2)に規定されている。また、凹部の平均面積は、円すいころ13の最表面位置での面積である。
なお、従来例では、鋼材(SUJ2)に、塑性加工、研削加工、研削仕上げ加工を施して、円すいころ軸受の円すいころを作製した。また、実施例では、従来例の円すいころに、更にバレル加工を施して、表1に示す表面性状とした。さらに、参考例では、従来例の円すいころに、実施例と異なる条件で、バレル加工を施して、表1に示す表面性状とした。なお、表1の参考例及び実施例では、円すいころの個数nを30とし、Rpk、Rk、Rvkは、n個の円すいころの最小値と最大値を表している。
従来例、実施例の各円すいころを用いた円すいころ軸受に対して、潤滑油として低粘度油(ISO VG10~VG15想定)を同じ供給量で供給し、希薄潤滑下条件を想定した耐久試験を行った。耐久試験では、動等価荷重20000N程度を負荷し、回転速度4000min-1にて軸受を回転させ、異常が発生するまでの回転時間を測定した。
つぎに、従来例、実施例及び参考例の各円すいころを用いた円すいころ軸受に対して、試験開始前に軸受に潤滑油としてISO VG32相当の汎用油を塗布し、試験中は潤滑油を供給することなく、アキシアル荷重4000Nを負荷し、回転速度4000min-1にて軸受を回転させ、滑り摩擦が主である大径側端面と大鍔部との間が焼付きに至るまでの回転時間(焼付き寿命)を測定した、
さらに、従来例、実施例及び参考例の各円すいころを用いた円すいころ軸受に対して、試験2と同様の潤滑油を供給しながら、軸受の回転数を変化させ、アキシアル荷重3000Nを負荷し、回転速度毎の軸受回転トルクを測定した。
11 外輪
12 内輪
13 円すいころ
13b 大径側端面
13c 転動面
Claims (3)
- 内輪及び外輪と、
該内輪及び外輪間に転動自在に配置される複数の円すいころと、を備える円すいころ軸受であって、
前記各円すいころの、少なくとも転動面及び大径側端面の表面粗さは、突出山部高さRpkが0.02~0.17μm、コア部のレベル差Rkが0.12~0.21μm、突出谷部高さRvkが0.07~0.43μmであり、該円すいころの表面に存在する微細な凹凸における、凹部の平均面積が5μm2以下である、円すいころ軸受。 - 前記各円すいころの表面はバレル加工によって仕上げ加工されており、
前記表面における、極表面の硬さは、前記バレル加工前の表面に対して、105%~135%の硬さを有する、請求項1に記載の円すいころ軸受。 - 前記各円すいころの表面性状のアスペクト比Strが0.2以上である、請求項1又は2に記載の円すいころ軸受。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN202080024174.5A CN113631821B (zh) | 2019-03-25 | 2020-03-19 | 圆锥滚子轴承 |
KR1020217031183A KR102647465B1 (ko) | 2019-03-25 | 2020-03-19 | 원추 롤러 베어링 |
US17/441,933 US11846317B2 (en) | 2019-03-25 | 2020-03-19 | Tapered roller bearing |
EP20776638.7A EP3951196B1 (en) | 2019-03-25 | 2020-03-19 | Tapered roller bearing |
JP2021509352A JP7120447B2 (ja) | 2019-03-25 | 2020-03-19 | 円すいころ軸受 |
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JP2019-056970 | 2019-03-25 | ||
JP2019056970 | 2019-03-25 |
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US (1) | US11846317B2 (ja) |
EP (1) | EP3951196B1 (ja) |
JP (1) | JP7120447B2 (ja) |
KR (1) | KR102647465B1 (ja) |
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KR102647465B1 (ko) * | 2019-03-25 | 2024-03-13 | 닛본 세이고 가부시끼가이샤 | 원추 롤러 베어링 |
JP7032469B2 (ja) * | 2020-03-26 | 2022-03-08 | 大同メタル工業株式会社 | 摺動部材 |
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JP2019056970A (ja) | 2017-09-19 | 2019-04-11 | カシオ計算機株式会社 | 情報処理装置、人工知能選択方法及び人工知能選択プログラム |
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JP4465895B2 (ja) * | 2000-05-22 | 2010-05-26 | 日本精工株式会社 | ころ軸受 |
EP1260723B1 (en) * | 2001-05-16 | 2007-01-31 | JTEKT Corporation | Roller bearing having streaked grinding trail on the rollers end faces and on the flange guide surface |
JP2004183783A (ja) * | 2002-12-03 | 2004-07-02 | Nsk Ltd | 転がり軸受 |
JP2004308665A (ja) * | 2003-04-01 | 2004-11-04 | Fuji Heavy Ind Ltd | 歯車 |
JP2011196543A (ja) * | 2010-02-23 | 2011-10-06 | Nsk Ltd | ころ軸受およびその製造方法 |
US20130170780A1 (en) | 2010-02-23 | 2013-07-04 | Nsk Ltd. | Roller Bearing and Method for Manufacturing the Same |
JP5920221B2 (ja) * | 2010-11-12 | 2016-05-18 | 日本精工株式会社 | 作動装置の製造方法 |
KR102647465B1 (ko) * | 2019-03-25 | 2024-03-13 | 닛본 세이고 가부시끼가이샤 | 원추 롤러 베어링 |
JP6885491B2 (ja) * | 2019-04-26 | 2021-06-16 | 日本精工株式会社 | 摺動部材の摩擦設計方法および表面粗さ管理方法並びに摺動機構の製造方法 |
DE112020004434T5 (de) * | 2019-09-19 | 2022-06-23 | Ntn Corporation | Kegelrollenlager |
WO2021054281A1 (ja) * | 2019-09-19 | 2021-03-25 | Ntn株式会社 | 円すいころ軸受 |
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JP2002187049A (ja) * | 2000-12-22 | 2002-07-02 | Toyoda Mach Works Ltd | 研削加工方法 |
JP2003269468A (ja) * | 2002-03-13 | 2003-09-25 | Koyo Seiko Co Ltd | ころ軸受 |
JP4754234B2 (ja) | 2005-02-17 | 2011-08-24 | Ntn株式会社 | 転がり軸受 |
JP4994638B2 (ja) | 2005-10-28 | 2012-08-08 | Ntn株式会社 | 円すいころ軸受 |
JP2008057478A (ja) * | 2006-08-31 | 2008-03-13 | Nippon Piston Ring Co Ltd | シリンダライナとピストンリングの組み合わせ |
JP2015094402A (ja) * | 2013-11-11 | 2015-05-18 | 日本精工株式会社 | ころ軸受 |
JP2017082977A (ja) * | 2015-10-30 | 2017-05-18 | 日野自動車株式会社 | 有摺接面部材及び有摺接面部材の製造方法 |
JP2019056970A (ja) | 2017-09-19 | 2019-04-11 | カシオ計算機株式会社 | 情報処理装置、人工知能選択方法及び人工知能選択プログラム |
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CN113631821A (zh) | 2021-11-09 |
EP3951196A1 (en) | 2022-02-09 |
US11846317B2 (en) | 2023-12-19 |
JPWO2020196342A1 (ja) | 2020-10-01 |
JP7120447B2 (ja) | 2022-08-17 |
US20220196065A1 (en) | 2022-06-23 |
KR20210130797A (ko) | 2021-11-01 |
CN113631821B (zh) | 2024-03-19 |
KR102647465B1 (ko) | 2024-03-13 |
EP3951196A4 (en) | 2022-05-25 |
EP3951196B1 (en) | 2023-05-24 |
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