JP2007009951A - Inner ring for tapered roller bearing and tapered roller bearing - Google Patents

Inner ring for tapered roller bearing and tapered roller bearing Download PDF

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Publication number
JP2007009951A
JP2007009951A JP2005188606A JP2005188606A JP2007009951A JP 2007009951 A JP2007009951 A JP 2007009951A JP 2005188606 A JP2005188606 A JP 2005188606A JP 2005188606 A JP2005188606 A JP 2005188606A JP 2007009951 A JP2007009951 A JP 2007009951A
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Prior art keywords
inner ring
tapered roller
roller bearing
conical raceway
raceway surface
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JP2005188606A
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Japanese (ja)
Inventor
Hiroyuki Oshima
宏之 大島
Kanichi Kouda
寛一 耕田
Naoki Masuda
直樹 益田
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JTEKT Corp
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JTEKT Corp
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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
    • 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
    • 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
    • F16C2240/70—Diameters; Radii

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner ring for a tapered roller bearing capable of preventing an end of a collar face on a large diameter side of a conical raceway surface from being broken during conveyance before finishing and having excellent wear resistance and long service life and to provide the tapered roller bearing having the inner ring for the tapered roller bearing. <P>SOLUTION: Rockwell hardness of a surface of the inner ring 2 is set to 61 to 67. Chamfering of radius of curvature of 1.0 mm or more is applied to a corner of a tip in the outside in the radial direction of the collar face 17 of a large diameter collar part 10 on a large diameter side of the conical raceway surface 14 in a cross section including a central axis of the conical raceway surface 14 of the inner ring 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、円錐ころ軸受用内輪および円錐ころ軸受に関する。   The present invention relates to an inner ring for a tapered roller bearing and a tapered roller bearing.

従来、円錐ころ軸受用内輪としては、円錐軌道面の中心軸を含む断面において、円錐軌道面の大径側の鍔面の先端が鋭角をなすようにして、上記鍔面が円錐ころを抱く力を大きくすると共に、表面全面に熱処理を施すことにより、表面硬さを大きくして、耐摩耗性を向上させているものがある。   Conventionally, as an inner ring for a tapered roller bearing, in the cross section including the central axis of the conical raceway surface, the force that the above-described saddle surface holds the tapered roller so that the leading end of the large-diameter side of the conical raceway surface forms an acute angle. In some cases, the surface hardness is increased by applying heat treatment to the entire surface and the wear resistance is improved.

しかしながら、上記従来の円錐ころ軸受用内輪では、上記鍔面の先端が鋭角の角度を成している上に、表面硬さを大きくしているので、精密な研磨を行う仕上げ前の搬送中に、例えば、円錐ころ軸受用内輪をホッパからベルトに落下させた時や、多数の円錐ころ軸受用内輪を同一の箱に収容して運んでいる時等に、上記鍔面の先端が欠けたり割れたりすることがあり、円錐ころ軸受用内輪の歩留まりが低いという問題がある。
特開２０００−１６１３６３号公報 However, in the conventional inner ring for tapered roller bearings, the tip of the flange surface forms an acute angle and the surface hardness is increased, so that during polishing before finishing to perform precise polishing For example, when the inner ring for the tapered roller bearing is dropped from the hopper onto the belt, or when a large number of inner rings for the tapered roller bearing are carried in the same box, the tip of the flange surface is chipped or cracked. There is a problem that the yield of the inner ring for the tapered roller bearing is low.
JP 2000-161363 A

そこで、本発明の課題は、仕上げ前の搬送中に円錐軌道面の大径側の鍔面の先端が破損しにくく、かつ、耐摩耗性に優れて寿命が長い円錐ころ軸受用内輪、および、その円錐ころ軸受用内輪を有する円錐ころ軸受を提供することにある。   Therefore, the problem of the present invention is that the tip of the flange surface on the large diameter side of the conical raceway surface is not easily damaged during conveyance before finishing, and has an excellent wear resistance and a long life, and an inner ring for a tapered roller bearing, and An object of the present invention is to provide a tapered roller bearing having an inner ring for the tapered roller bearing.

上記課題を解決するため、この発明の円錐ころ軸受用内輪は、
円錐軌道面の大径側に鍔部を有する円錐ころ軸受用内輪において、
表面のロックウェル硬さが６１〜６７であり、
上記円錐軌道面の中心軸を含む断面において、上記鍔部の鍔面の径方向外方の先端の角に、曲率半径が１.０ｍｍ以上の面取りが施されていることを特徴としている。 In order to solve the above problems, an inner ring for a tapered roller bearing according to the present invention is:
In the inner ring for a tapered roller bearing having a flange on the large diameter side of the conical raceway surface,
The surface Rockwell hardness is 61-67,
In a cross section including the central axis of the conical raceway surface, a chamfer having a radius of curvature of 1.0 mm or more is performed at a corner of a radially outer tip of the collar surface of the collar portion.

本発明によれば、表面のロックウェル硬さが６１〜６７であり、表面のロックウェル硬さが、高炭素クロム軸受鋼（ＳＵＪ２）の内輪や浸炭焼入を行ったＳＡＥ５１２０鋼の内輪と比較して大きいので、耐摩耗性を向上させることができて、寿命を長くすることができる。   According to the present invention, the surface Rockwell hardness is 61 to 67, and the surface Rockwell hardness is compared with the inner ring of high carbon chrome bearing steel (SUJ2) and the inner ring of SAE5120 steel subjected to carburizing and quenching. Therefore, the wear resistance can be improved and the life can be extended.

また、本発明によれば、上記円錐軌道面の中心軸を含む断面において、上記鍔部の鍔面の径方向外方の先端の角に、曲率半径が１.０ｍｍ以上の面取りが施されているので、上記鍔面の径方向外方の先端の角が従来と比較して滑らかになって、精密な研磨を行う仕上げ前の搬送中に、ホッパからベルトに落下させたり、多数の内輪を同一の箱に収容して運んだりしても、上記鍔面の先端が欠けたり割れたりすることを抑制できる。したがって、歩留まりを大きくすることができる。   Further, according to the present invention, in the cross section including the central axis of the conical raceway surface, a chamfer having a radius of curvature of 1.0 mm or more is applied to a corner of a radially outer tip of the flange surface of the flange portion. As a result, the corners on the radially outer tip of the collar surface are smoother than conventional ones. Even if it is accommodated in the same box and carried, it is possible to suppress the tip of the collar surface from being chipped or cracked. Therefore, the yield can be increased.

また、一実施形態の円錐ころ軸受用内輪は、上記円錐軌道面の大径側の端部の軸方向外方の端面における径方向外方の角に、曲率半径が１.５ｍｍ以上の面取りが施されている。   Further, the inner ring for the tapered roller bearing of one embodiment has a chamfer with a radius of curvature of 1.5 mm or more at a radially outer corner of an end surface on the outer side in the axial direction of the end portion on the large diameter side of the conical raceway surface. It has been subjected.

上記実施形態によれば、上記円錐軌道面の大径側の端部の端面における径方向外方の角に、曲率半径が１.５ｍｍ以上の面取りが施されているので、上記円錐軌道面の大径側の端部の端面における径方向外方の角が、欠けたり割れたりすることを抑制できる。   According to the above embodiment, the chamfer with a radius of curvature of 1.5 mm or more is applied to the radially outer corner of the end surface of the large diameter end of the conical raceway surface. It can suppress that the corner of the diameter direction outside in the end face of the end part by the side of a large diameter is chipped or broken.

また、一実施形態の円錐ころ軸受用内輪は、上記円錐軌道面の小径側の端部の軸方向外方の端面における径方向外方の角に、曲率半径が１.５ｍｍ以上の面取りが施されている。   Also, the inner ring for tapered roller bearing of one embodiment is chamfered with a radius of curvature of 1.5 mm or more at the radially outer corner of the end surface on the small diameter side of the conical raceway surface. Has been.

上記実施形態によれば、上記円錐軌道面の小径側の端部の端面における径方向外方の角に、曲率半径が１.５ｍｍ以上の面取りが施されているので、上記円錐軌道面の小径側の端部の端面における径方向外方の角が、欠けたり割れたりすることを抑制できる。   According to the above-described embodiment, the chamfering with a radius of curvature of 1.5 mm or more is applied to the radially outer corner of the end surface on the small diameter side of the conical raceway surface. It can suppress that the corner of the diameter direction outer side in the end surface of the side edge part is chipped or broken.

また、一実施形態の円錐ころ軸受は、本発明の円錐ころ軸受用内輪を備えている。   Moreover, the tapered roller bearing of one Embodiment is provided with the inner ring | wheel for tapered roller bearings of this invention.

本発明によれば、本発明の円錐ころ軸受用内輪を備えるので、内輪の耐摩耗性を大きくすることができて内輪の寿命を長くすることができる。また、精密な研磨を行う仕上げ前の搬送中に、内輪の円錐軌道面の大径側の鍔面の径方向外方の先端が欠けたり割れたりすることを抑制できるので、内輪の歩留まりを大きくできる。   According to the present invention, since the inner ring for tapered roller bearings of the present invention is provided, the wear resistance of the inner ring can be increased and the life of the inner ring can be extended. In addition, it is possible to prevent the radially outer tip of the flange surface on the large diameter side of the conical raceway surface of the inner ring from being chipped or cracked during the pre-finishing conveyance that performs precise polishing, thereby increasing the yield of the inner ring. it can.

本発明の円錐ころ軸受用保持器によれば、表面のロックウェル硬さが６１〜６７であり、表面のロックウェル硬さが、高炭素クロム軸受鋼（ＳＵＪ２）の内輪や浸炭焼入を行ったＳＡＥ５１２０鋼の内輪と比較して大きいので、耐摩耗性を大きくすることができて、寿命を長くすることができる。   According to the tapered roller bearing retainer of the present invention, the surface Rockwell hardness is 61 to 67, and the surface Rockwell hardness is obtained by performing inner ring or carburizing and quenching of high carbon chromium bearing steel (SUJ2). Further, since it is larger than the inner ring of SAE5120 steel, the wear resistance can be increased and the life can be extended.

また、本発明の円錐ころ軸受用保持器によれば、上記円錐軌道面の中心軸を含む断面において、上記鍔部の鍔面の径方向外方の先端の角に、曲率半径が１.０ｍｍ以上の面取りが施されているので、上記鍔面の上記先端の角が従来と比較して滑らかになって、精密な研磨を行う仕上げ前の搬送中に、上記鍔面の先端が欠けたり割れたりすることを抑制できる。したがって、歩留まりを大きくすることができる。   Further, according to the tapered roller bearing retainer of the present invention, in a cross section including the central axis of the conical raceway surface, a radius of curvature is 1.0 mm at a corner of a radially outer tip of the flange surface of the flange portion. Since the above chamfering has been applied, the corner of the tip of the flange surface becomes smoother than before, and the tip of the flange surface is chipped or cracked during transport before finishing to perform precise polishing. Can be suppressed. Therefore, the yield can be increased.

以下、本発明を図示の形態により詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the drawings.

図１は、本発明の一実施形態の円錐ころ軸受の軸方向の断面図である。   FIG. 1 is an axial sectional view of a tapered roller bearing according to an embodiment of the present invention.

この円錐ころ軸受は、外輪１と、本発明の一実施形態の円錐ころ軸受用内輪（以下、内輪という）２と、円錐ころ３とを備える。   The tapered roller bearing includes an outer ring 1, an inner ring (hereinafter referred to as an inner ring) 2 for a tapered roller bearing according to an embodiment of the present invention, and a tapered roller 3.

上記外輪１の外周面は、図示しない工作機械等のハウジングに嵌合固定されている一方、内輪２の内周面は、図示しない回転軸に嵌合固定されている。上記内輪２の円錐軌道面１４の大径側には、大径鍔部１０が形成され、内輪２の円錐軌道面１４の小径側には、小径鍔部１１が形成されている。また、上記円錐ころ３は、外輪１の円錐軌道面１３と内輪２の円錐軌道面１４との間に保持器５に保持された状態で、周方向に略等間隔に複数配置されている。   The outer circumferential surface of the outer ring 1 is fitted and fixed to a housing such as a machine tool (not shown), while the inner circumferential surface of the inner ring 2 is fitted and fixed to a rotating shaft (not shown). A large-diameter flange portion 10 is formed on the large-diameter side of the conical raceway surface 14 of the inner ring 2, and a small-diameter flange portion 11 is formed on the small-diameter side of the conical raceway surface 14 of the inner ring 2. A plurality of the tapered rollers 3 are arranged at substantially equal intervals in the circumferential direction while being held by the cage 5 between the conical raceway surface 13 of the outer ring 1 and the conical raceway surface 14 of the inner ring 2.

上記外輪１、内輪２および円錐ころ３の表面は、浸炭鋼から成り、かつ、表面から５０μｍまでの深さの表層部のマトリックス相中の炭素量が０.８重量％以上であり、かつ、表面硬さがロックウェル硬さで６３〜６７であり、かつ、表面残留オーステナイト量が２０％以上２５％未満に設定されている。   The surfaces of the outer ring 1, the inner ring 2 and the tapered roller 3 are made of carburized steel, and the amount of carbon in the matrix phase of the surface layer part having a depth of 50 μm from the surface is 0.8% by weight or more, and The surface hardness is 63 to 67 in terms of Rockwell hardness, and the surface retained austenite amount is set to 20% or more and less than 25%.

図２は、内輪２（円錐軌道面１４）の中心軸を含む軸方向の断面図である。図２において、Ｒ１は、円錐軌道面１４の大径側の鍔面１７における径方向外方の先端の角の面取りの曲率半径を示し、Ｒ２は、円錐軌道面１４の大径側の端部の軸方向外方の端面２０における径方向外方の角の面取りの曲率半径を示し、Ｒ３は、円錐軌道面１４の小径側の端部の軸方向外方の端面２１における径方向外方の角の面取りの曲率半径を示している。   FIG. 2 is a sectional view in the axial direction including the central axis of the inner ring 2 (conical raceway surface 14). In FIG. 2, R1 indicates the radius of curvature of the chamfer at the corner of the radially outer tip of the flange surface 17 on the large diameter side of the conical raceway surface 14, and R2 indicates the end of the cone raceway surface 14 on the large diameter side. The radius of curvature of the chamfer at the radially outer corner of the axially outer end face 20 of the axial direction is indicated by R3, and R3 is the radially outward end face 21 of the end of the conical raceway surface 14 on the small diameter side. The radius of curvature of the corner chamfer is shown.

図２に示すＲ１は、１.０ｍｍ以上２.０ｍｍ以下になっている。また、図２に示すＲ２は、１.５ｍｍ以上４.０ｍｍ以下になっており、図２に示すＲ３は、１.５ｍｍ以上３.０ｍｍ以下になっている。   R1 shown in FIG. 2 is not less than 1.0 mm and not more than 2.0 mm. Moreover, R2 shown in FIG. 2 is 1.5 mm or more and 4.0 mm or less, and R3 shown in FIG. 2 is 1.5 mm or more and 3.0 mm or less.

上記実施形態の内輪２によれば、内輪２の表面のロックウェル硬さが６３〜６７であり、表面のロックウェル硬さが、高炭素クロム軸受鋼（ＳＵＪ２）の内輪や浸炭焼入を行ったＳＡＥ５１２０鋼の内輪と比較して大きいので、耐摩耗性を大きくすることができると共に、内輪の表面の破損を抑制できて、寿命を長くすることができる。尚、内輪の表面のロックウェル硬さを６１〜６７に設定すれば、内輪の表面の耐摩耗性を大きくすることができると共に、内輪の表面の破損を抑制できて、内輪の寿命を大きくすることができる。   According to the inner ring 2 of the above embodiment, the Rockwell hardness of the surface of the inner ring 2 is 63 to 67, and the surface of the Rockwell hardness is the inner ring of high carbon chrome bearing steel (SUJ2) or carburized and quenched. Since it is larger than the inner ring of SAE5120 steel, it is possible to increase the wear resistance, to suppress the damage of the surface of the inner ring, and to extend the life. If the Rockwell hardness of the inner ring surface is set to 61 to 67, the wear resistance of the inner ring surface can be increased, the inner ring surface can be prevented from being damaged, and the inner ring life can be increased. be able to.

また、上記実施形態の内輪２によれば、円錐軌道面１４の中心軸を含む断面において、大径鍔部１０の鍔面１７の径方向外方の先端の角に、曲率半径が１.０ｍｍ以上の面取りが施されているので、大径鍔部１０の鍔面１７の径方向外方の先端の角が従来と比較して滑らかになって、精密な研磨を行う仕上げ前の搬送中に、ホッパからベルトに落下させたり、多数の内輪２を同一の箱に収容して運んだりしても、鍔面１７の先端が欠けたり割れたりすることを抑制できる。したがって、歩留まりを大きくすることができる。尚、本実施形態のように、上記鍔面１７の径方向外方の先端の角の面取りの曲率半径Ｒ１を、２.０ｍｍ以下にすると、鍔面１７の面積が過小になることがなくて、当該鍔面と円錐ころ大端面の接触面圧が過大になることがない。このことから、鍔面１７および円錐ころ３に焼付が発生することを抑制できて好ましい。   Further, according to the inner ring 2 of the above embodiment, in the cross section including the central axis of the conical raceway surface 14, the radius of curvature is 1.0 mm at the corner of the radially outer tip of the flange surface 17 of the large diameter flange portion 10. Since the above chamfering is performed, the corner of the radially outer tip of the flange surface 17 of the large-diameter flange portion 10 becomes smoother than in the prior art, during the conveyance before finishing to perform precise polishing. Even if the belt is dropped from the hopper onto the belt or a large number of inner rings 2 are accommodated in the same box and carried, the tip of the flange surface 17 can be prevented from being broken or cracked. Therefore, the yield can be increased. As in this embodiment, when the radius of curvature R1 of the chamfer at the end of the radially outer end of the flange surface 17 is 2.0 mm or less, the area of the flange surface 17 does not become excessively small. The contact surface pressure between the flange surface and the tapered roller large end surface does not become excessive. This is preferable because seizure can be prevented from occurring on the flange surface 17 and the tapered roller 3.

また、上記実施形態の内輪２によれば、円錐軌道面１４の大径側の端部の軸方向外方の端面２０における径方向外方の角に、曲率半径が１.５ｍｍ以上の面取りが施されているので、端面２０における径方向外方の角が、欠けたり割れたりすることを抑制できる。尚、本実施形態のように、上記端面２０の径方向外方の角の面取りの曲率半径Ｒ２を、４.０ｍｍ以下にすると、大径鍔部１０の外周側に、円錐ころ３を組み込むのに問題がない広さを有する円筒面を形成できて好ましい。換言すると、円錐軌道面の大径側の軸方向の外方の端面の径方向外方の角の面取りの曲率半径Ｒ２を、４.０ｍｍよりも大きくすると、円錐軌道面の大径側の端部の径方向外方の円筒面の広さが過小になって、外輪と内輪との間に円錐ころを組み込みにくくなる。   Further, according to the inner ring 2 of the above-described embodiment, a chamfer having a radius of curvature of 1.5 mm or more is formed at the radially outer corner of the axially outer end surface 20 of the large-diameter end of the conical raceway surface 14. Since it is given, it can control that the corner of the end face 20 in the diameter direction outside is chipped or broken. As in this embodiment, when the radius of curvature R2 of the chamfer at the radially outer corner of the end face 20 is 4.0 mm or less, the tapered roller 3 is incorporated on the outer peripheral side of the large-diameter flange portion 10. It is preferable that a cylindrical surface having a width with no problem can be formed. In other words, when the radius of curvature R2 of the chamfer at the radially outer corner of the axially outer end surface of the conical raceway surface is larger than 4.0 mm, the end of the conical raceway surface on the large diameter side The width of the cylindrical surface on the radially outer side of the portion becomes excessively small, and it becomes difficult to incorporate the tapered roller between the outer ring and the inner ring.

また、上記実施形態の内輪２によれば、円錐軌道面１４の小径側の端部の軸方向外方の端面２１における径方向外方の角に、曲率半径が１.５ｍｍ以上の面取りが施されているので、端面２１における径方向外方の角が、欠けたり割れたりすることを抑制できる。尚、本実施形態のように、上記端面２１の径方向外方の角の面取りの曲率半径Ｒ３を、３.０ｍｍ以下にすると、小径鍔部１１の外周側に、円錐ころ３を組み込むのに問題がない広さを有する円筒面を形成できて好ましい。円錐軌道面１４の小径側の軸方向の外方の端面の径方向外方の角の面取りの曲率半径Ｒ３を、３.０ｍｍよりも大きくすると、円錐軌道面の小径側の端部の径方向外方の円筒面の広さが過小になって、外輪と内輪との間に円錐ころを組み込みにくくなる。   Further, according to the inner ring 2 of the above embodiment, chamfering with a radius of curvature of 1.5 mm or more is performed on the radially outer corner of the axially outer end surface 21 of the small diameter end of the conical raceway surface 14. Therefore, it is possible to prevent the radially outer corner of the end face 21 from being chipped or cracked. As in this embodiment, when the radius of curvature R3 of the chamfer at the radially outer corner of the end face 21 is 3.0 mm or less, the tapered roller 3 is incorporated on the outer peripheral side of the small-diameter flange portion 11. A cylindrical surface having a width with no problem can be formed, which is preferable. When the radius of curvature R3 of the chamfer at the radially outer corner of the axially outer end surface of the conical raceway surface 14 is larger than 3.0 mm, the radial direction of the end of the conical raceway surface on the small diameter side The area of the outer cylindrical surface becomes too small, and it becomes difficult to incorporate the tapered roller between the outer ring and the inner ring.

また、上記円錐ころ軸受によれば、上記実施形態の内輪２を有するので、内輪２の寿命を長くすることができ、また、精密な研磨を行う仕上げ前の搬送中に、内輪２の円錐軌道面１４の大径側の鍔面１７の径方向外方の先端が欠けたり割れたりすることを抑制できるので、内輪２の歩留まりを大きくすることができる。   Further, according to the tapered roller bearing, since the inner ring 2 of the above embodiment is provided, the life of the inner ring 2 can be extended, and the conical raceway of the inner ring 2 can be provided during conveyance before finishing to perform precise polishing. Since it is possible to prevent the radially outer tip of the flange surface 17 on the large diameter side of the surface 14 from being chipped or cracked, the yield of the inner ring 2 can be increased.

尚、上記実施形態の内輪２では、内輪２の表面は、浸炭鋼から成り、かつ、表面から５０μｍまでの深さの表層部のマトリックス相中の炭素量が０.８重量％以上であり、かつ、表面硬さがロックウェル硬さで６３〜６７であり、かつ、表面残留オーステナイト量が２０％以上２５％未満に設定されていた。   In the inner ring 2 of the above embodiment, the surface of the inner ring 2 is made of carburized steel, and the amount of carbon in the matrix phase of the surface layer portion having a depth of 50 μm from the surface is 0.8% by weight or more, And surface hardness was 63-67 in Rockwell hardness, and the surface retained austenite amount was set to 20% or more and less than 25%.

しかしながら、この発明では、内輪の表面の材質として、以下の（１）〜（３）の特徴を有する材質を使用しても良い。（１）炭素０.１５〜０.３重量％を含む鋼材に、浸炭処理を含む熱処理を施すことによって形成されている。（２）最表面を基準として０〜５０μｍの深さの部分において、炭素量が１.０〜１.５重量％、ロックウェル硬さが６４〜６６、圧縮残留応力が１５０〜２０００ＭＰａ、最大炭化物径が３μｍ以下、および、炭化物面積率が１０〜２５％である。（３）有効硬化層深さをａ［μｍ］としたとき、５０〜ａ／５μｍの深さの部分において、炭素量が０．７５〜１．３重量％、圧縮残留応力が１５０〜１０００ＭＰａ、残留オーステナイト量が２５〜４５％、最大炭化物径が１μｍ以下、および、炭化物面積率が１５％以下である。   However, in the present invention, a material having the following characteristics (1) to (3) may be used as the material of the inner ring surface. (1) It is formed by subjecting a steel material containing 0.15 to 0.3% by weight of carbon to heat treatment including carburizing treatment. (2) The carbon content is 1.0 to 1.5% by weight, Rockwell hardness is 64 to 66, compressive residual stress is 150 to 2000 MPa, maximum carbide at a depth of 0 to 50 μm based on the outermost surface. The diameter is 3 μm or less, and the carbide area ratio is 10 to 25%. (3) When the effective hardened layer depth is a [μm], the carbon content is 0.75 to 1.3% by weight and the compressive residual stress is 150 to 1000 MPa in a portion having a depth of 50 to a / 5 μm. The amount of retained austenite is 25 to 45%, the maximum carbide diameter is 1 μm or less, and the carbide area ratio is 15% or less.

また、内輪の表面の材質として、以下の（４）の特徴を有する材質を使用しても良い。（４）高炭素鋼系材料に浸炭窒化または窒化を施して表面部に浸炭窒化物または窒化物を形成すると共に、表面部基質を内部より高炭素、高窒素として焼入れした後、２００〜２５０℃の範囲の温度で焼き戻しして形成されている。   Moreover, you may use the material which has the following characteristics (4) as a material of the surface of an inner ring | wheel. (4) Carbonitriding or nitriding is performed on the high carbon steel material to form carbonitride or nitride on the surface portion, and after quenching the surface portion substrate as high carbon and high nitrogen from the inside, 200 to 250 ° C. It is formed by tempering at a temperature in the range of.

また、内輪の表面の材質として、以下の（５）の特徴を有する材質を使用しても良い。（５）高炭素鋼系材料に浸炭窒化または窒化を施して表面部に浸炭窒化物または窒化物を形成すると共に、表面部基質を内部より高炭素、高窒素として焼入れした後、サブゼロ処理を行うと共に、１５０〜２００℃の範囲の温度で焼き戻しして形成されている。   Moreover, you may use the material which has the following characteristics (5) as a material of the surface of an inner ring | wheel. (5) Carbonitriding or nitriding a high carbon steel material to form carbonitride or nitride on the surface, and quenching the surface substrate as high carbon and high nitrogen from the inside, followed by subzero treatment At the same time, it is formed by tempering at a temperature in the range of 150 to 200 ° C.

本発明の一実施形態の円錐ころ軸受の軸方向の断面図である。It is sectional drawing of the axial direction of the tapered roller bearing of one Embodiment of this invention. 本発明の一実施形態の内輪の中心軸を含む軸方向の断面図である。It is sectional drawing of the axial direction containing the central axis of the inner ring | wheel of one Embodiment of this invention.

符号の説明Explanation of symbols

１ 外輪
２ 内輪
３ 円錐ころ
５ 保持器
１０ 大径鍔部
１１ 小径鍔部
１３,１４ 円錐軌道面
１７ 鍔面
２０,２１ 端面 DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Tapered roller 5 Cage 10 Large-diameter collar part 11 Small-diameter collar part 13,14 Conical raceway surface 17 Collar surface 20,21 End surface

Claims (4)

円錐軌道面の大径側に鍔部を有する円錐ころ軸受用内輪において、
表面のロックウェル硬さが６１〜６７であり、
上記円錐軌道面の中心軸を含む断面において、上記鍔部の鍔面の径方向外方の先端の角に、曲率半径が１.０ｍｍ以上の面取りが施されていることを特徴とする円錐ころ軸受用内輪。 In the inner ring for a tapered roller bearing having a flange on the large diameter side of the conical raceway surface,
The surface Rockwell hardness is 61-67,
A tapered roller characterized in that, in a cross section including the central axis of the conical raceway surface, a chamfer having a radius of curvature of 1.0 mm or more is applied to a corner of a radially outer tip of the collar surface of the collar portion. Bearing inner ring. 請求項１に記載の円錐ころ軸受用内輪において、
上記円錐軌道面の大径側の端部の軸方向外方の端面における径方向外方の角に、曲率半径が１.５ｍｍ以上の面取りが施されていることを特徴とする円錐ころ軸受用内輪。 In the inner ring for tapered roller bearings according to claim 1,
For tapered roller bearings, wherein a chamfer with a radius of curvature of 1.5 mm or more is applied to a radially outward corner of an end surface on the axially outer side of the end portion on the large diameter side of the conical raceway surface. Inner ring. 請求項１または２に記載の円錐ころ軸受用内輪において、
上記円錐軌道面の小径側の端部の軸方向外方の端面における径方向外方の角に、曲率半径が１.５ｍｍ以上の面取りが施されていることを特徴とする円錐ころ軸受用内輪。 In the inner ring for tapered roller bearings according to claim 1 or 2,
An inner ring for a tapered roller bearing, characterized in that a chamfer with a radius of curvature of 1.5 mm or more is applied to a radially outer corner of an end surface on the axially outer side of the end portion on the small diameter side of the conical raceway surface. . 請求項１乃至３のいずれか１つに記載の円錐ころ軸受用内輪を備えることを特徴とする円錐ころ軸受。
A tapered roller bearing comprising the inner ring for a tapered roller bearing according to any one of claims 1 to 3.
JP2005188606A 2005-06-28 2005-06-28 Inner ring for tapered roller bearing and tapered roller bearing Pending JP2007009951A (en)

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JP2008223973A (en) * 2007-03-15 2008-09-25 Jtekt Corp Tapered roller bearing device
US8259601B2 (en) 2007-10-16 2012-09-04 Mediatek Inc. Interference measurement mechanism for frequency reuse in cellular OFDMA systems
WO2017073325A1 (en) * 2015-10-29 2017-05-04 Ntn株式会社 Method for manufacturing bearing ring, and multi-row tapered roller bearing and manufacturing method therefor
WO2017073326A1 (en) * 2015-10-29 2017-05-04 Ntn株式会社 Method for manufacturing bearing ring and method for manufacturing multi-row tapered roller bearing
US20220120316A1 (en) * 2017-09-28 2022-04-21 Ntn Corporation Tapered roller bearing

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Publication number Priority date Publication date Assignee Title
JP2008223973A (en) * 2007-03-15 2008-09-25 Jtekt Corp Tapered roller bearing device
US9051964B2 (en) 2007-03-15 2015-06-09 Jtekt Corporation Tapered roller bearing apparatus and hub unit
US8259601B2 (en) 2007-10-16 2012-09-04 Mediatek Inc. Interference measurement mechanism for frequency reuse in cellular OFDMA systems
WO2017073325A1 (en) * 2015-10-29 2017-05-04 Ntn株式会社 Method for manufacturing bearing ring, and multi-row tapered roller bearing and manufacturing method therefor
WO2017073326A1 (en) * 2015-10-29 2017-05-04 Ntn株式会社 Method for manufacturing bearing ring and method for manufacturing multi-row tapered roller bearing
CN108350945A (en) * 2015-10-29 2018-07-31 Ntn株式会社 Method for producing bearer ring and the method for producing double-row conical bearing
CN108350944A (en) * 2015-10-29 2018-07-31 Ntn株式会社 Produce method, double-row conical bearing and the method for producing double-row conical bearing of bearer ring
EP3369954A4 (en) * 2015-10-29 2019-04-03 NTN Corporation Method for manufacturing bearing ring and method for manufacturing multi-row tapered roller bearing
EP3369953A4 (en) * 2015-10-29 2019-06-19 NTN Corporation Method for manufacturing bearing ring, and multi-row tapered roller bearing and manufacturing method therefor
US10718377B2 (en) 2015-10-29 2020-07-21 Ntn Corporation Method for producing bearing ring, double row tapered roller bearing, and method for producing double row tapered roller bearing
US20220120316A1 (en) * 2017-09-28 2022-04-21 Ntn Corporation Tapered roller bearing
US11668343B2 (en) * 2017-09-28 2023-06-06 Ntn Corporation Tapered roller bearing

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