JP5891873B2 - Roller follower - Google Patents

Roller follower Download PDF

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JP5891873B2
JP5891873B2 JP2012059932A JP2012059932A JP5891873B2 JP 5891873 B2 JP5891873 B2 JP 5891873B2 JP 2012059932 A JP2012059932 A JP 2012059932A JP 2012059932 A JP2012059932 A JP 2012059932A JP 5891873 B2 JP5891873 B2 JP 5891873B2
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diameter
inner ring
diameter step
small
roller follower
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JP2013194766A (en
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誠 藤波
誠 藤波
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NSK Ltd
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NSK Ltd
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Description

本発明は、鍔輪を装着したローラフォロアに関するものである。   The present invention relates to a roller follower equipped with a collar.

従来のローラフォロアにおいては、図５に示す様に、外周面をカム従動面とした外輪４１の内部に内輪４２を組み込み、外輪４１の内周面と内輪４２の外周面との間に、一定間隔で配置される複数の転動体４４を介在させ、内輪４２に対して外輪４１を回転自在に保持するとともに、上記外輪４１の両側に設けられた大径段部４５の内部に内輪４２の端部に圧入固定された一対の鍔輪４６、４６がローラフォロア４０の軸方向に対峙する様に配置されている。（特許文献１）   In the conventional roller follower, as shown in FIG. 5, an inner ring 42 is incorporated inside an outer ring 41 whose outer peripheral surface is a cam driven surface, and a constant distance is provided between the inner peripheral surface of the outer ring 41 and the outer peripheral surface of the inner ring 42. A plurality of rolling elements 44 arranged at intervals are interposed, and the outer ring 41 is rotatably held with respect to the inner ring 42, and the end of the inner ring 42 is placed inside the large-diameter step portion 45 provided on both sides of the outer ring 41. A pair of collars 46, 46 that are press-fitted and fixed to the part are arranged so as to face each other in the axial direction of the roller follower 40. (Patent Document 1)

特許文献１においては、一対の鍔輪４６，４６がローラフォロア軸方向両端に対峙するように配置されているので、ローラフォロアの転動体周辺に注入された潤滑剤の飛散、枯渇を防止するとともに、ローラフォロア外部からの異物の混入も防止している。   In Patent Document 1, since the pair of saddle wheels 46 and 46 are arranged so as to face both ends of the roller follower in the axial direction, it is possible to prevent the lubricant injected around the rolling elements of the roller follower from being scattered and depleted. In addition, foreign matter from outside the roller follower is prevented.

また、前記鍔輪４６の内輪４２への圧入に際しては、内輪４２の両側に小径段部４７を設けこれに鍔輪４６を圧入すると共に、内輪４２の小径段部内周面における径ｄ１を内輪内径Ｄ１よりも大径となるように形成している。このように小径段部内径ｄ１を内輪内径Ｄ１より大径とすることで、鍔輪４６圧入時の小径段部４７の変形空間を確保して、前記内輪４２に圧入される図示しない軸等への鍔輪圧入の影響を回避している。   Further, when press-fitting the inner ring 46 into the inner ring 42, small diameter step portions 47 are provided on both sides of the inner ring 42, and the inner ring 46 is press-fitted into the inner ring 42. It is formed to have a larger diameter than D1. Thus, by setting the small-diameter step portion inner diameter d1 to be larger than the inner ring inner diameter D1, a deformation space of the small-diameter step portion 47 at the time of press-fitting the saddle wheel 46 is secured, and the shaft is inserted into the inner ring 42 (not shown). The influence of the injection of the Minowa is avoided.

特開２００１−２０８０８６号公報Japanese Patent Laid-Open No. 2001-208086

しかしながら、特許文献１のローラフォロアでは、内輪への鍔輪圧入のために、内輪内径面すなわち小径段部内周面の一部を大径として圧入変形空間に活用している為、軸と内輪内周面との対向する面積の一部を前記鍔輪の圧入変形空間に割かねばならず、軸と内輪内周面の接触面積が減少し、軸摩耗促進の一因にもなっていた。   However, in the roller follower disclosed in Patent Document 1, the inner ring inner surface, that is, a part of the inner surface of the small-diameter step portion is used as a large diameter in the press-fit deformation space for press-fitting the inner ring into the inner ring. A part of the area facing the peripheral surface must be divided into the press-fit deformation space of the saddle wheel, and the contact area between the shaft and the inner peripheral surface of the inner ring is reduced, which also contributes to the promotion of shaft wear.

本発明はこのような実情に鑑みてなされたもので、ローラフォロア内輪への鍔輪圧入に際しても、内輪変形による軸への干渉を防止しつつ、内輪と軸間の軸摩耗を抑制できるローラフォロアの提供を目的としている。   The present invention has been made in view of such circumstances, and a roller follower capable of suppressing shaft wear between the inner ring and the shaft while preventing interference with the shaft due to deformation of the inner ring even when the inner ring is press-fitted into the roller follower inner ring. The purpose is to provide.

前記課題を解決するための第一の発明は、軸方向両端に大径段部を備えた外輪と、軸方向両端に肩部を備えた内輪と、外輪と内輪間に介在した複数の転動体と、前記大径段部と前記肩部との間にあって、前記肩部に圧入固定された環状の鍔部とを備えたローラフォロアにおいて、前記鍔部における前記肩部側の肉厚ｔと前記大径段部側の肉厚Ｔとの関係が、Ｔ＞ｔとなるよう鍔部肉厚の断面形状を段付き形状とするとともに、前記内輪内径において内輪内径Ｄと、前記内輪の前記肩部において、前記鍔部の肩部側肉厚ｔの範囲で前記内輪内周面を内径ｄに拡径した拡径部を備えたことを特徴とする。   A first invention for solving the above problems includes an outer ring having large-diameter stepped portions at both ends in the axial direction, an inner ring having shoulder portions at both ends in the axial direction, and a plurality of rolling elements interposed between the outer ring and the inner ring. And a roller follower provided with an annular flange that is between the large-diameter stepped portion and the shoulder and is press-fitted and fixed to the shoulder. The cross-sectional shape of the collar thickness is a stepped shape so that the relationship with the thickness T on the large-diameter step portion side is T> t, and the inner ring inner diameter D and the shoulder portion of the inner ring at the inner ring inner diameter In the above, the present invention is characterized in that a diameter-enlarged portion is formed by enlarging the inner peripheral surface of the inner ring to an inner diameter d within a range of the shoulder-side thickness t of the collar portion.

また、第二の発明は、軸方向両端に大径段部を備えた外輪と、軸方向両端に小径段部を備えた内輪と、外輪と内輪間に介在した複数の転動体と、前記大径段部と前記小径段部との間にあって、前記小径段部に圧入固定された環状の鍔部とを備えたローラフォロアにおいて、前記鍔部における前記小径段部側の肉厚ｔと前記大径段部側の肉厚Ｔとの関係が、Ｔ＞ｔとなるよう鍔部肉厚の断面形状を段付き形状とし、鍔部と小径段部とを突き当て鍔部の位置決めを行うとともに、前記内輪内径において内輪内径Ｄと、前記内輪の前記小径段部において、前記鍔部の小径段部側肉厚ｔの範囲で前記内輪内周面を内径ｄに拡径した拡径部を備えたことを特徴とする。   The second invention includes an outer ring having large-diameter stepped portions at both ends in the axial direction, an inner ring having small-diameter stepped portions at both ends in the axial direction, a plurality of rolling elements interposed between the outer ring and the inner ring, In a roller follower provided with an annular flange between the diameter step and the small diameter step and press-fitted and fixed to the small diameter step, the thickness t on the small diameter step side of the flange and the large The cross-sectional shape of the collar portion thickness is a stepped shape so that the relationship with the thickness T on the diameter step side becomes T> t, and the collar portion and the small diameter step portion are abutted to position the collar portion, In the inner ring inner diameter, the inner ring inner diameter D and the smaller diameter step portion of the inner ring are provided with a diameter-enlarged portion in which the inner ring inner peripheral surface is expanded to an inner diameter d in the range of the small diameter step portion side wall thickness t of the flange portion. It is characterized by that.

本発明によれば、鍔部の内輪への圧入部分の肉厚を薄肉にし、かつ鍔部の圧入部分に対応する肩部の内径のみを内輪内径より大径としているので、鍔部の圧入による内輪変形を吸収できると共に、軸と内輪内径との接触面積を増加させることが出来、軸摩耗を抑制したローラフォロアの提供が可能となる。   According to the present invention, the thickness of the press-fitted portion of the collar portion into the inner ring is made thin, and only the inner diameter of the shoulder corresponding to the press-fit portion of the collar portion is larger than the inner ring inner diameter. It is possible to absorb the inner ring deformation, increase the contact area between the shaft and the inner ring inner diameter, and provide a roller follower that suppresses shaft wear.

本発明の実施形態のローラフォロアを示す断面図である。It is sectional drawing which shows the roller follower of embodiment of this invention. 本発明の第二の実施形態のローラフォロアを示す断面図である。It is sectional drawing which shows the roller follower of 2nd embodiment of this invention. 本発明の第二の実施形態のローラフォロアの変形例を示す断面図である。It is sectional drawing which shows the modification of the roller follower of 2nd embodiment of this invention. 従来のローラフォロアを示す断面図である。It is sectional drawing which shows the conventional roller follower.

以下、本発明の実施形態について説明する。
本実施形態は、図１に示すように、内輪３と、外輪２と、前記内輪３と前記外輪２間に配置される複数の転動体４と、前記内輪３と前記外輪２間にあって、転動体を外部より隔離する一対の鍔部６，６とを備えたローラフォロア１となっている。 Hereinafter, embodiments of the present invention will be described.
As shown in FIG. 1, the present embodiment includes an inner ring 3, an outer ring 2, a plurality of rolling elements 4 disposed between the inner ring 3 and the outer ring 2, and the inner ring 3 and the outer ring 2. The roller follower 1 includes a pair of flanges 6 and 6 that isolate the moving body from the outside.

ローラフォロアの外輪２は、ローラフォロア軸方向両端に一対の大径段部５を備えており、内輪２は、ローラフォロア軸方向両端に一対の肩部７を備えている。   The outer ring 2 of the roller follower includes a pair of large diameter step portions 5 at both ends in the roller follower axial direction, and the inner ring 2 includes a pair of shoulder portions 7 at both ends in the roller follower axial direction.

鍔部６は円環状の部材であり、外径の肉厚Ｔよりも内径の肉厚ｔが薄くなっており、前記鍔部６の断面形状においては段付き形状を成している。そして、この鍔部６は、ローラフォロア内輪２の肩部７に圧入され内輪２と一体的に保持されている。   The flange portion 6 is an annular member, and the inner wall thickness t is thinner than the outer diameter wall thickness T. The cross-sectional shape of the flange portion 6 has a stepped shape. The flange 6 is press-fitted into the shoulder 7 of the roller follower inner ring 2 and is held integrally with the inner ring 2.

このとき、内輪２の内周面は、図示しない直径Ｄの軸を圧入固定するために内径Ｄの円筒形状を成しているが、内輪２の肩部７の内径においては、前記鍔部の内径肉厚寸法ｔの範囲内で前記内径Ｄより拡径した内径ｄとなる拡径部８を備えている。これにより、前記肩部７のｔ寸法分だけ薄肉となることで鍔部の圧入作業性が容易になる一方、内輪２への鍔部６圧入により肩部７に変形が生じた際においても、内輪２に圧入された軸の外周面と前記拡径部８間に生じた隙間によって肩部７の変形を吸収し軸への干渉を防止できる。また、軸と接触しない拡径部８は、鍔部肉厚寸法ｔの範囲内だけに限定しているため、軸外周面と内輪内周面との接触面積を極力増やすことができるので、軸面圧の分散が図られて軸摩耗の抑制に寄与することができる。また、内輪内径の拡径部８長さを圧入に必要な長さの範囲に抑えることで、内輪全体の剛性も向上し、鍔部６の圧入による内輪軌道面変形への影響も低減できる。   At this time, the inner peripheral surface of the inner ring 2 has a cylindrical shape with an inner diameter D in order to press-fit and fix a shaft having a diameter D (not shown), but the inner diameter of the shoulder 7 of the inner ring 2 is Within the range of the inner diameter thickness dimension t, an enlarged diameter portion 8 is provided which becomes an inner diameter d larger than the inner diameter D. Thereby, while the thickness of the shoulder portion 7 becomes thin, the press-fit workability of the heel portion is facilitated, but also when the shoulder portion 7 is deformed by the press-fit of the heel portion 6 to the inner ring 2, The gap formed between the outer peripheral surface of the shaft press-fitted into the inner ring 2 and the enlarged diameter portion 8 can absorb the deformation of the shoulder portion 7 and prevent interference with the shaft. Moreover, since the enlarged diameter part 8 which does not contact a shaft is limited only within the range of the flange thickness dimension t, the contact area between the shaft outer peripheral surface and the inner ring inner peripheral surface can be increased as much as possible. The dispersion of the surface pressure can be achieved, which can contribute to the suppression of shaft wear. Further, by suppressing the length of the enlarged diameter portion 8 of the inner ring inner diameter to a range of the length necessary for press-fitting, the rigidity of the entire inner ring can be improved, and the influence on the inner ring raceway surface deformation due to the press-fitting of the flange portion 6 can be reduced.

また、第二の実施形態を図２に示す。第一の実施形態と同じ構成は同一の符号を付してある。本実施形態では、内輪１２に小径段部１７を設けてある。この小径段部１７の一端に鍔部６を圧入し、小径段部１７の縦壁と、転動体４に対向する鍔部６の縦壁とを突き当てて、ローラフォロア軸方向にて鍔部６の位置決めしている。その他の構成は第一の実施形態と同様である。これにより、内輪１２への鍔部６圧入による小径段部１７に変形が生じた際にも、内輪１２に圧入された軸の外周面と拡径部８間に生じた隙間によって小径段部１７の変形を吸収し軸への干渉を防止できる。また、軸と接触しない拡径部８は、鍔部肉厚寸法ｔの範囲内だけに限定しているため、軸外周面と内輪内周面との接触面積を極力増やすことができるので、軸面圧の分散が図られて軸摩耗の抑制に寄与することができる。また、内輪内径の拡径部８長さを圧入に必要な長さの範囲に抑えることで、内輪全体の剛性も向上し、鍔部６の圧入による内輪軌道面変形への影響も低減できる。   A second embodiment is shown in FIG. The same components as those in the first embodiment are denoted by the same reference numerals. In the present embodiment, the inner ring 12 is provided with a small diameter step portion 17. The flange portion 6 is press-fitted into one end of the small-diameter step portion 17, the vertical wall of the small-diameter step portion 17 and the vertical wall of the flange portion 6 facing the rolling element 4 are abutted, and the flange portion in the roller follower axial direction. 6 positioning. Other configurations are the same as those of the first embodiment. As a result, even when the small-diameter step portion 17 is deformed due to the press-fitting of the flange portion 6 into the inner ring 12, the small-diameter step portion 17 is formed by the gap generated between the outer peripheral surface of the shaft press-fitted into the inner ring 12 and the enlarged-diameter portion 8. It is possible to absorb the deformation of the shaft and prevent interference with the shaft. Moreover, since the enlarged diameter part 8 which does not contact a shaft is limited only within the range of the flange thickness dimension t, the contact area between the shaft outer peripheral surface and the inner ring inner peripheral surface can be increased as much as possible. The dispersion of the surface pressure can be achieved, which can contribute to the suppression of shaft wear. Further, by suppressing the length of the enlarged diameter portion 8 of the inner ring inner diameter to a range of the length necessary for press-fitting, the rigidity of the entire inner ring can be improved, and the influence on the inner ring raceway surface deformation due to the press-fitting of the flange portion 6 can be reduced.

また、第二の実施形態の変形例を図３に示す。第一の実施形態、第二の実施形態と同じ構成は同一の符号を付してある。本実施形態では、内輪２２に小径段部２７を設けてある。この小径段部２７の一端に鍔部１６を圧入し、小径段部２７の縦壁と鍔部１６の段部１６ａとを突き当てて、ローラフォロア軸方向にて鍔部１６の位置決めしている。その他の構成は第一の実施形態、第二の実施形態と同様である。これにより、内輪２２への鍔部１６圧入による小径段部２７に変形が生じた際にも、内輪２２に圧入された軸の外周面と拡径部８間に生じた隙間によって小径段部２７の変形を吸収し軸への干渉を防止できる。また、軸と接触しない拡径部８は、鍔部肉厚寸法ｔの範囲内だけに限定しているため、軸外周面と内輪内周面との接触面積を極力増やすことができるので、軸面圧の分散が図られて軸摩耗の抑制に寄与することができる。また、内輪内径の拡径部８長さを圧入に必要な長さの範囲に抑えることで、内輪全体の剛性も向上し、鍔部６の圧入による内輪軌道面変形への影響も低減できる。   A modification of the second embodiment is shown in FIG. The same components as those in the first embodiment and the second embodiment are denoted by the same reference numerals. In the present embodiment, a small diameter step portion 27 is provided on the inner ring 22. The flange portion 16 is press-fitted into one end of the small-diameter step portion 27, the vertical wall of the small-diameter step portion 27 and the step portion 16a of the flange portion 16 are abutted, and the flange portion 16 is positioned in the roller follower axial direction. . Other configurations are the same as those of the first embodiment and the second embodiment. Thereby, even when the small diameter step portion 27 is deformed by the press fitting of the flange portion 16 to the inner ring 22, the small diameter step portion 27 is formed by the gap generated between the outer peripheral surface of the shaft press-fitted into the inner ring 22 and the enlarged diameter portion 8. It is possible to absorb the deformation of the shaft and prevent interference with the shaft. Moreover, since the enlarged diameter part 8 which does not contact a shaft is limited only within the range of the flange thickness dimension t, the contact area between the shaft outer peripheral surface and the inner ring inner peripheral surface can be increased as much as possible. The dispersion of the surface pressure can be achieved, which can contribute to the suppression of shaft wear. Further, by suppressing the length of the enlarged diameter portion 8 of the inner ring inner diameter to a range of the length necessary for press-fitting, the rigidity of the entire inner ring can be improved, and the influence on the inner ring raceway surface deformation due to the press-fitting of the flange portion 6 can be reduced.

１ ローラフォロア
２ 外輪
３ 内輪
４ 転動体
５ 大径段部
６ 鍔部
７ 肩部
８ 拡径部
１７、２７ 小径段部 DESCRIPTION OF SYMBOLS 1 Roller follower 2 Outer ring 3 Inner ring 4 Rolling element 5 Large diameter step part 6 Gutter part 7 Shoulder part 8 Wide diameter part 17, 27 Small diameter step part

Claims (2)

軸方向両端に大径段部を備えた外輪と、軸方向両端に肩部を備えた内輪と、外輪と内輪間に介在した複数の転動体と、前記大径段部と前記肩部との間にあって、前記肩部に圧入固定された環状の鍔部とを備えたローラフォロアにおいて、前記鍔部における前記肩部側の肉厚ｔと前記大径段部側の肉厚Ｔとの関係が、Ｔ＞ｔとなるよう鍔部肉厚の断面形状を段付き形状とするとともに、前記内輪内径において内輪内径Ｄと、前記内輪の前記肩部において、前記鍔部の肩部側肉厚ｔの範囲で前記内輪内周面を内径ｄに拡径した拡径部を備えたことを特徴とするローラフォロア。   An outer ring having large-diameter stepped portions at both axial ends, an inner ring having shoulder portions at both axial ends, a plurality of rolling elements interposed between the outer ring and the inner ring, and the large-diameter stepped portion and the shoulder portion. In a roller follower having an annular flange that is press-fitted and fixed to the shoulder, the relationship between the thickness t on the shoulder and the wall thickness T on the large diameter step is , T> t so that the cross-sectional shape of the buttock thickness is a stepped shape, the inner ring inner diameter D at the inner ring inner diameter, and the shoulder side wall thickness t of the buttock at the shoulder of the inner ring. A roller follower comprising a diameter-enlarged portion in which the inner circumferential surface of the inner ring is expanded to an inner diameter d. 軸方向両端に大径段部を備えた外輪と、軸方向両端に小径段部を備えた内輪と、外輪と内輪間に介在した複数の転動体と、前記大径段部と前記小径段部との間にあって、前記小径段部に圧入固定された環状の鍔部とを備えたローラフォロアにおいて、前記鍔部における前記小径段部側の肉厚ｔと前記大径段部側の肉厚Ｔとの関係が、Ｔ＞ｔとなるよう鍔部肉厚の断面形状を段付き形状とし、鍔部と小径段部とを突き当て鍔部の位置決めを行うとともに、前記内輪内径において内輪内径Ｄと、前記内輪の前記小径段部において、前記鍔部の小径段部側肉厚ｔの範囲で前記内輪内周面を内径ｄに拡径した拡径部を備えたことを特徴とするローラフォロア。   An outer ring having large diameter step portions at both axial ends, an inner ring having small diameter step portions at both axial ends, a plurality of rolling elements interposed between the outer ring and the inner ring, the large diameter step portion and the small diameter step portion A roller follower provided with an annular flange that is press-fitted and fixed to the small-diameter step portion, and a wall thickness t on the small-diameter step portion side and a wall thickness T on the large-diameter step portion side of the flange portion. The cross-sectional shape of the collar part thickness is a stepped shape so that T> t, and the collar part is positioned by abutting the collar part and the small-diameter step part. The roller follower is characterized in that the small-diameter step portion of the inner ring includes a large-diameter portion in which the inner peripheral surface of the inner ring is expanded to an inner diameter d in the range of the wall thickness t on the small-diameter step portion side of the flange portion.
JP2012059932A 2012-03-16 2012-03-16 Roller follower Active JP5891873B2 (en)

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JP2001003932A (en) * 1999-06-17 2001-01-09 Nsk Ltd Rolling bearing
JP2009063116A (en) * 2007-09-07 2009-03-26 Nsk Ltd Rolling bearing

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