JP2009127803A - Shaft device with bearing - Google Patents

Shaft device with bearing Download PDF

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Publication number
JP2009127803A
JP2009127803A JP2007305789A JP2007305789A JP2009127803A JP 2009127803 A JP2009127803 A JP 2009127803A JP 2007305789 A JP2007305789 A JP 2007305789A JP 2007305789 A JP2007305789 A JP 2007305789A JP 2009127803 A JP2009127803 A JP 2009127803A
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Prior art keywords
shaft
bearing
inner ring
outer diameter
diameter surface
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Yoshitaka Waseda
義孝 早稲田
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JTEKT Corp
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JTEKT Corp
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Priority to JP2007305789A priority Critical patent/JP2009127803A/en
Publication of JP2009127803A publication Critical patent/JP2009127803A/en
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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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • 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
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • 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
    • F16C2360/00—Engines or pumps
    • F16C2360/18—Camshafts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Gears, Cams (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft device with a bearing manufacturable at low cost by easily assembling block bodies such as cam blocks and the inner ring of a rolling bearing onto the outer diameter surface of a shaft in the axial direction. <P>SOLUTION: This shaft device includes the shaft 12, the block bodies 16, and the rolling bearing 31. The block bodies 16 and the inner ring 32 of the rolling bearing 31 are axially fitted to the outer diameter surface of the shaft 12 in this order and disposed at predetermined intervals. A rotation stop part 20 for stopping the rotation of the inner ring 32 of the rolling bearing 31 around the axis of the shaft 12 by the engagement thereof is formed between the outer diameter surface of the shaft 12 and the inner ring 32 of the rolling bearing 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、シャフトと、駒体と、転がり軸受とを備えた軸受付きシャフト装置に関する。   The present invention relates to a bearing-equipped shaft device including a shaft, a piece, and a rolling bearing.

シャフトと、駒体と、転がり軸受とを備えた軸受付きシャフト装置としては、例えば、内燃機関のシリンダヘッド部に回転可能に組み付けられる軸受付きカムシャフト装置がある。
軸受付きシャフト装置が軸受付きカムシャフト装置である場合、シャフトと、所定数のカム駒（駒体に相当する）と、シャフトの外径面の一部を内輪軌道面とする転がり軸受がそれぞれ個別に製作された後、シャフトの外径面の軸方向に、カム駒と転がり軸受とが所定の間隔を保って所定順に嵌合されて配置される。
また、特許文献１に開示されているように、シャフトの外径面の軸方向に所定数のカム駒が配置された状態において、分割構成された転がり軸受がシャフトの外径面の半径方向外側から組み付けられる構造の軸受付きカムシャフト装置が知られている。
特開２００７−１９２３１５号公報 As a shaft device with a bearing provided with a shaft, a frame, and a rolling bearing, for example, there is a cam shaft device with a bearing that is rotatably assembled to a cylinder head portion of an internal combustion engine.
When the shaft device with a bearing is a camshaft device with a bearing, each of the shaft, a predetermined number of cam pieces (corresponding to a piece), and a rolling bearing in which a part of the outer diameter surface of the shaft is an inner ring raceway surface is individually provided. Then, the cam piece and the rolling bearing are fitted and arranged in a predetermined order at a predetermined interval in the axial direction of the outer diameter surface of the shaft.
In addition, as disclosed in Patent Document 1, in a state where a predetermined number of cam pieces are arranged in the axial direction of the outer diameter surface of the shaft, the divided rolling bearings are radially outward of the outer diameter surface of the shaft. There is known a camshaft device with a bearing having a structure assembled from the above.
JP 2007-192315 A

ところで、常温の状態で、シャフトの外径面の軸方向に、その外径面の一部を内輪軌道面とする転がり軸受と、カム駒とを所定の間隔を保って嵌合すると、シャフトの外径面にカム駒による圧入傷が発生し、転がり軸受としての機能が悪化される。このため、シャフトの外径面を熱処理等によって所望する硬度に表面処理した後、冷し嵌合めによって転がり軸受と、カム駒とを所定の間隔を保って嵌合する必要があり、コスト高なる。
また、特許文献１においては、転がり軸受を分割構成してシャフトの外径面の半径方向外側から組み付けなければならず、転がり軸受の製作や、組み付けが厄介となる。 By the way, when the rolling bearing having a part of the outer diameter surface in the axial direction of the outer diameter surface of the shaft and the cam piece is fitted at a predetermined interval in the axial direction of the outer diameter surface of the shaft, A press-fitting due to a cam piece occurs on the outer diameter surface, and the function as a rolling bearing is deteriorated. For this reason, after the outer diameter surface of the shaft is surface-treated to a desired hardness by heat treatment or the like, it is necessary to cool and fit the rolling bearing and the cam piece at a predetermined interval, which increases the cost. Become.
In Patent Document 1, the rolling bearing must be divided and assembled from the outside in the radial direction of the outer diameter surface of the shaft, which makes it difficult to manufacture and assemble the rolling bearing.

この発明の目的は、前記問題点に鑑み、シャフトの外径面の軸方向に、カム駒等の駒体と、転がり軸受とを容易に組み付けることができ、コスト低減を図ることができる軸受付きシャフト装置を提供することである。   In view of the above problems, an object of the present invention is to provide a bearing with which a frame body such as a cam frame and a rolling bearing can be easily assembled in the axial direction of the outer diameter surface of the shaft, and the cost can be reduced. A shaft device is provided.

前記目的を達成するために、この発明の請求項１に係る軸受付きシャフト装置は、シャフトと、駒体と、転がり軸受とを備えた軸受付きシャフト装置であって、
前記シャフトの外径面の軸方向に、前記駒体と、前記転がり軸受の内輪とが順次に嵌合されて所定の間隔を保って配置され、
前記シャフトの外径面と前記転がり軸受の内輪との間には、相互に係合して前記シャフトの軸回りに対する前記転がり軸受の内輪の回転を阻止する回止め部が設けられていることを特徴とする。 In order to achieve the object, a bearing-equipped shaft device according to claim 1 of the present invention is a shaft-equipped bearing device comprising a shaft, a piece, and a rolling bearing,
In the axial direction of the outer diameter surface of the shaft, the piece and the inner ring of the rolling bearing are sequentially fitted and arranged at a predetermined interval,
Between the outer diameter surface of the shaft and the inner ring of the rolling bearing, there is provided a locking portion that engages with each other and prevents rotation of the inner ring of the rolling bearing relative to the shaft axis. Features.

前記構成によると、シャフトの外径面の軸方向に駒体と転がり軸受とを所定順に所定の間隔を保って嵌合して配置すると共に、シャフトの外径面と転がり軸受の内輪との間に設けられた回止め部を相互に係合させてシャフトの軸回りに転がり軸受の内輪を回り止めする。
これによって、シャフトの外径面に転がり軸受の内輪を大きい締め代をもって嵌合（圧入）する必要性を解消することができ、この分だけ組付けが容易となる。
言い換えると、回止め部の係合によって、シャフトの軸回りに対し転がり軸受の内輪を回り止めすることができるため、シャフトの外径面の軸方向に転がり軸受の内輪が不測に位置ずれすることがない程度の小さい締め代をもってシャフトの外径面に転がり軸受の内輪を容易に嵌合して組み付けることができる。
また、シャフトの外径面の一部を内輪軌道面とする針状ころ軸受と異なり、シャフトとは別体の転がり軸受の内輪がシャフトの軸回りに回り止めされて配置される構造上、転がり軸受の内輪軌道面にカム駒による圧入傷が発生する不具合を解消することができる。
このため、従来と異なり、シャフトの外径面を熱処理等によって表面処理した後、冷し嵌合めによって転がり軸受と、カム駒とを嵌合する必要性を解消することができ、コスト低減において効果が大きい。 According to the above configuration, the frame body and the rolling bearing are fitted and arranged in a predetermined order at a predetermined interval in the axial direction of the outer diameter surface of the shaft, and between the outer diameter surface of the shaft and the inner ring of the rolling bearing. The rotation stoppers provided on the shaft are engaged with each other to prevent the inner ring of the rolling bearing from rotating about the shaft axis.
As a result, it is possible to eliminate the need to fit (press-fit) the inner ring of the rolling bearing to the outer diameter surface of the shaft with a large tightening allowance, and assembling is facilitated accordingly.
In other words, since the inner ring of the rolling bearing can be prevented from rotating around the shaft axis by engaging the locking part, the inner ring of the rolling bearing is unintentionally displaced in the axial direction of the outer diameter surface of the shaft. The inner ring of the rolling bearing can be easily fitted and assembled to the outer diameter surface of the shaft with such a small tightening allowance.
In addition, unlike needle roller bearings in which a part of the outer diameter surface of the shaft is the inner ring raceway surface, the inner ring of a rolling bearing separate from the shaft is arranged around the shaft axis so that it is rolling. It is possible to eliminate a problem that a press-fitting due to a cam piece occurs on the inner ring raceway surface of the bearing.
For this reason, unlike the conventional case, after the outer diameter surface of the shaft is surface-treated by heat treatment or the like, it is possible to eliminate the necessity of fitting the rolling bearing and the cam piece by cooling and fitting. Great effect.

この発明の請求項２に係る軸受付きシャフト装置は、請求項１に記載の軸受付きシャフト装置であって、
回止め部は、シャフトの外径面の軸方向に延びる凹溝と、転がり軸受の内輪の内径面から中心側に向けて突出され、かつ前記凹溝に係合して回り止めをなす突起とを有して構成されていることを特徴とする。
前記構成によると、シャフトの外径面の軸方向に複数の転がり軸受を配置する場合においては、これら複数の転がり軸受の各内輪の突起をシャフトの外径面の軸方向に延びる凹溝にそれぞれ係合させることによって、複数の転がり軸受の各内輪を良好に回り止めすることができる。 A shaft device with a bearing according to claim 2 of the present invention is the shaft device with a bearing according to claim 1,
The anti-rotation portion includes a groove extending in the axial direction of the outer diameter surface of the shaft, a protrusion protruding toward the center from the inner diameter surface of the inner ring of the rolling bearing, and a protrusion that engages with the groove and forms a detent. It is characterized by having.
According to the above configuration, in the case where a plurality of rolling bearings are arranged in the axial direction of the outer diameter surface of the shaft, the protrusions of the inner rings of the plurality of rolling bearings are respectively recessed grooves extending in the axial direction of the outer diameter surface of the shaft. By engaging, each inner ring of the plurality of rolling bearings can be prevented from rotating well.

次に、この発明を実施するための最良の形態を実施例にしたがって説明する。   Next, the best mode for carrying out the present invention will be described with reference to examples.

（実施例１）
この発明の実施例１を図１〜図３にしたがって説明する。
図１はこの発明の実施例１に係る軸受付きカムシャフト装置を示す縦断面図である。図２は軸受付きカムシャフト装置のシャフトの外径面の軸方向にカム駒と針状ころ軸受とが配置された状態を拡大して示す縦断面図である。図３は針状ころ軸受の内輪を示す縦断面図である。図４は図３のＩＶ−ＩＶ線に基づく横断面である。図５は針状ころ軸受の内輪を示す斜視図である。 (Example 1)
A first embodiment of the present invention will be described with reference to FIGS.
1 is a longitudinal sectional view showing a camshaft device with a bearing according to Embodiment 1 of the present invention. FIG. 2 is an enlarged longitudinal sectional view showing a state in which the cam piece and the needle roller bearing are arranged in the axial direction of the outer diameter surface of the shaft of the camshaft device with a bearing. FIG. 3 is a longitudinal sectional view showing an inner ring of the needle roller bearing. 4 is a cross-sectional view based on the line IV-IV in FIG. FIG. 5 is a perspective view showing an inner ring of the needle roller bearing.

図１に示すように、この実施例１においては、軸受付きシャフト装置が内燃機関のシリンダヘッド部に組み付けられる軸受付きカムシャフト装置（カムシャフトユニット）１１である場合を例示する。
軸受付きカムシャフト装置１１は、シャフト１２と、駒体としての複数のカム駒１６と、転がり軸受としての複数のシェル形の針状ころ軸受３１とを一体状に備えてユニット化されている。
また、図２に示すように、針状ころ軸受３１は、内輪３２と、外輪（シェル）３５と、これら内輪３２と、外輪３５の間に転動可能に配設された複数の転動体としての針状ころ３８と、これら針状ころ３８を保持する保持器３９とを備えている。 As shown in FIG. 1, the first embodiment exemplifies a case where the shaft device with bearing is a camshaft device with bearing (camshaft unit) 11 assembled to a cylinder head portion of an internal combustion engine.
The camshaft device 11 with a bearing is unitized with a shaft 12, a plurality of cam pieces 16 as a frame body, and a plurality of shell-shaped needle roller bearings 31 as a rolling bearing.
2, the needle roller bearing 31 includes an inner ring 32, an outer ring (shell) 35, and a plurality of rolling elements disposed between the inner ring 32 and the outer ring 35 so as to be capable of rolling. Needle rollers 38 and a retainer 39 for holding these needle rollers 38.

図１に示すように、複数のカム駒１６と、針状ころ軸受３１の内輪３２は、シャフト１２の外径面の軸方向に順次に嵌合されて所定の間隔を保って配置されている。
また、複数のカム駒１６の内径寸法は、シャフト１２の軸上に所要とする締め代をもって嵌合（圧入）して固定できるようにシャフト１２の外径寸法よりも小さく設定されている。
また、針状ころ軸受３１の内輪３２の内径寸法は、シャフト１２の外径面の軸方向に内輪３２が不測に位置ずれすることがない程度の小さい締め代をもって嵌合できるようにシャフト１２の外径寸法と略同じ又は僅かに小さく設定されている。 As shown in FIG. 1, the plurality of cam pieces 16 and the inner ring 32 of the needle roller bearing 31 are sequentially fitted in the axial direction of the outer diameter surface of the shaft 12 and arranged at a predetermined interval. .
Further, the inner diameter dimensions of the plurality of cam pieces 16 are set to be smaller than the outer diameter dimension of the shaft 12 so that the cam pieces 16 can be fixed (fitted) with a required tightening margin on the shaft 12.
Further, the inner diameter of the inner ring 32 of the needle roller bearing 31 is such that the inner ring 32 can be fitted with a small tightening allowance so that the inner ring 32 is not displaced in the axial direction of the outer diameter surface of the shaft 12. It is set to be substantially the same as or slightly smaller than the outer diameter.

図２に示すように、シャフト１２の外径面と針状ころ軸受３１の内輪３２との間には、相互に係合してシャフト１２の軸回りに対する内輪３２の回転を阻止する回止め部２０が設けられている。
この実施例１において、回止め部２０は、図３と図４に示すように、シャフト１２の外径面の軸方向全長に延びる単数条又は複数条の凹溝１３と、図３〜図５に示すように、内輪３２の一端縁の内径面から中心側に向けて直角状に曲げられて凹溝１３に突入されて係合する単数又は複数の突起３４とを有して構成されている。 As shown in FIG. 2, between the outer diameter surface of the shaft 12 and the inner ring 32 of the needle roller bearing 31, a rotation stop portion that engages with each other to prevent the rotation of the inner ring 32 around the axis of the shaft 12. 20 is provided.
In the first embodiment, as shown in FIG. 3 and FIG. 4, the anti-rotation portion 20 includes a single or a plurality of concave grooves 13 extending along the entire axial length of the outer diameter surface of the shaft 12, and FIGS. As shown in FIG. 1, the inner ring 32 is configured to have one or a plurality of protrusions 34 that are bent at a right angle from the inner diameter surface of the one end edge toward the center side and are inserted into the groove 13 to be engaged. .

上述したように構成されるこの実施例１に係る軸受付きカムシャフト装置１１において、シャフト１２の外径面の軸方向に複数のカム駒１６と針状ころ軸受３１とを所定順に所定の間隔を保って嵌合して配置することによって軸受付きカムシャフト装置１１が構成される。
この際、複数のカム駒１６は、シャフト１２の軸上に所要とする締め代をもって圧入固定される。
また、複数の針状ころ軸受３１の各内輪３２は、これら内輪３２の突起３４がシャフト１２の凹溝１３内に突入された状態でシャフト１２の外径面の軸方向に、カム駒１６よりも小さい締め代をもって嵌合される。
そして、凹溝１３と突起３４との係合によってシャフト１２の軸回りに対し各内輪３２が回り止めされる。 In the camshaft device 11 with a bearing according to the first embodiment configured as described above, a plurality of cam pieces 16 and needle roller bearings 31 are arranged at predetermined intervals in a predetermined order in the axial direction of the outer diameter surface of the shaft 12. The camshaft device 11 with a bearing is configured by being fitted and arranged.
At this time, the plurality of cam pieces 16 are press-fitted and fixed on the shaft 12 with a required tightening allowance.
In addition, each inner ring 32 of the plurality of needle roller bearings 31 is provided by the cam piece 16 in the axial direction of the outer diameter surface of the shaft 12 with the projections 34 of the inner rings 32 being inserted into the recessed grooves 13 of the shaft 12. Are fitted with a small tightening allowance.
Each inner ring 32 is prevented from rotating about the axis of the shaft 12 by the engagement of the concave groove 13 and the protrusion 34.

前記したように、シャフト１２の軸回りに対し針状ころ軸受３１の内輪３２を回り止めすることができるため、シャフト１２の外径面の軸方向に内輪３２が不測に位置ずれすることがない程度の小さい締め代をもってシャフト１２の外径面に内輪３２を容易に嵌合して組み付けることができる。
また、シャフトの外径面の一部を内輪軌道面とする従来の針状ころ軸受と異なり、シャフト１２とは別体の針状ころ軸受３１の内輪３２がシャフト１２の軸回りに回り止めされて配置される構造上、内輪３２の外径面の軌道面３３にカム駒１６による圧入傷が発生する不具合を解消することができる。
このため、従来と異なり、シャフト１２の外径面を熱処理等によって表面処理した後、冷し嵌合めによって針状ころ軸受３１と、カム駒１６とを嵌合する必要性を解消することができ、コスト低減において効果が大きい。 As described above, since the inner ring 32 of the needle roller bearing 31 can be prevented from rotating around the axis of the shaft 12, the inner ring 32 is not unintentionally displaced in the axial direction of the outer diameter surface of the shaft 12. The inner ring 32 can be easily fitted and assembled to the outer diameter surface of the shaft 12 with a small allowance.
Further, unlike a conventional needle roller bearing in which a part of the outer diameter surface of the shaft is an inner ring raceway surface, the inner ring 32 of the needle roller bearing 31 that is separate from the shaft 12 is prevented from rotating around the axis of the shaft 12. Therefore, it is possible to eliminate the problem that the press-fitting due to the cam piece 16 occurs on the raceway surface 33 of the outer diameter surface of the inner ring 32.
For this reason, unlike the conventional case, after the outer diameter surface of the shaft 12 is surface-treated by heat treatment or the like, it is possible to eliminate the necessity of fitting the needle roller bearing 31 and the cam piece 16 by cooling and fitting. This is effective in reducing costs.

また、この実施例１において、シャフト１２の外径面の軸方向全長に延びる凹溝１３に複数の針状ころ軸受３１の各内輪３２の突起３４をそれぞれ突入させて係合させることによって、各内輪３２を良好に回り止めすることができる。  Further, in the first embodiment, the protrusions 34 of the inner rings 32 of the plurality of needle roller bearings 31 are respectively inserted into and engaged with the concave grooves 13 extending along the entire axial length of the outer diameter surface of the shaft 12. The inner ring 32 can be prevented from rotating well.

（実施例２）
次に、この発明の実施例２を図６〜図８にしたがって説明する。
図６はこの発明の実施例２に係る軸受付きシャフト装置としての軸受付きカムシャフト装置のシャフトの外径面の軸方向に駒体としてのカム駒と転がり軸受としての針状ころ軸受とが配置状態を拡大して示す縦断面図である。図７は図６のＶＩＩ−ＶＩＩ線に基づく横断面図である。図８は針状ころ軸受の内輪を示す斜視図である。
図６〜図８に示すように、この実施例２においては、シャフト１１２の外径面と針状ころ軸受１３１の内輪１３２との間に設けられる回止め部１２０の形状及び数を変更したものであり、シャフト１１２の外径面には、その軸方向全長に延びる複数条（図では二条）の凹溝１１３がそれぞれ形成されている。
一方、内輪１３２の両端縁に中心側に向けて突出する横断面略Ｖ字状の複数（図では各二つ）の突起１３４がそれぞれ形成されている。
この実施例２のその他の構成は、実施例１と同様にして構成されるため、その説明は省略する。 (Example 2)
Next, a second embodiment of the present invention will be described with reference to FIGS.
FIG. 6 shows a cam piece as a piece and a needle roller bearing as a rolling bearing in the axial direction of the outer diameter surface of the shaft of the camshaft device with bearing as the shaft device with bearing according to Embodiment 2 of the present invention. It is a longitudinal cross-sectional view which expands and shows a state. FIG. 7 is a cross-sectional view based on the line VII-VII in FIG. FIG. 8 is a perspective view showing an inner ring of the needle roller bearing.
As shown in FIGS. 6 to 8, in the second embodiment, the shape and number of the rotation stoppers 120 provided between the outer diameter surface of the shaft 112 and the inner ring 132 of the needle roller bearing 131 are changed. On the outer diameter surface of the shaft 112, a plurality of (two in the figure) concave grooves 113 extending in the entire axial direction are formed.
On the other hand, a plurality of (two in the drawing) protrusions 134 each having a substantially V-shaped cross section projecting toward the center side are formed at both end edges of the inner ring 132.
Since other configurations of the second embodiment are configured in the same manner as the first embodiment, the description thereof is omitted.

したがって、この実施例２においても、シャフト１１２の軸回りに対し針状ころ軸受１３１の内輪１３２を回り止めすることができるため、シャフト１１２の外径面の軸方向に内輪１３２が不測に位置ずれすることがない程度の小さい締め代をもってシャフト１１２の外径面に内輪１３２を容易に嵌合して組み付けることができ、内輪１３２の外径面の軌道面１３３にカム駒による圧入傷が発生する不具合を解消することができる。
このため、従来と異なり、シャフト１１２の外径面を熱処理等によって表面処理した後、冷し嵌合めによって針状ころ軸受１３１と、カム駒とを嵌合する必要性を解消することができ、コスト低減において効果が大きい。 Therefore, also in the second embodiment, the inner ring 132 of the needle roller bearing 131 can be prevented from rotating around the axis of the shaft 112, and therefore the inner ring 132 is unexpectedly displaced in the axial direction of the outer diameter surface of the shaft 112. The inner ring 132 can be easily fitted and assembled to the outer diameter surface of the shaft 112 with such a small tightening allowance that it does not occur. Trouble can be solved.
For this reason, unlike the conventional case, the need to fit the needle roller bearing 131 and the cam piece by cooling and fitting after the outer diameter surface of the shaft 112 is surface-treated by heat treatment or the like can be eliminated. Great effect in cost reduction.

なお、この発明は、前記実施例１及び２に限定されるものではなく、この発明の要旨を逸脱しない範囲内において、種々の形態で実施可能である。
例えば、前記実施例１及び２においては、軸受付きシャフト装置が軸受付きカムシャフト装置１１である場合を例示したが、例えば、駒体としてウエート体を有する軸受付きバランサーシャフト装置であってもよく、クランクシャフト装置等であってもよい。 In addition, this invention is not limited to the said Example 1 and 2, In the range which does not deviate from the summary of this invention, it can implement with a various form.
For example, in the first and second embodiments, the case where the shaft device with bearing is the camshaft device 11 with bearing is exemplified. However, for example, it may be a balancer shaft device with bearing having a weight body as a frame, It may be a crankshaft device or the like.

この発明の実施例１に係る軸受付きカムシャフト装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the camshaft apparatus with a bearing which concerns on Example 1 of this invention. 同じく軸受付きカムシャフト装置のシャフトの外径面の軸方向にカム駒と針状ころ軸受とが配置された状態を拡大して示す縦断面図である。It is a longitudinal cross-sectional view which expands and shows the state by which the cam piece and the needle roller bearing are similarly arrange | positioned in the axial direction of the outer diameter surface of the shaft of the cam shaft apparatus with a bearing. 同じく針状ころ軸受の内輪を示す縦断面図である。It is a longitudinal cross-sectional view which similarly shows the inner ring | wheel of a needle roller bearing. 同じく図３のＩＶ−ＩＶ線に基づく横断面である。It is a cross section based on the IV-IV line of FIG. 3 similarly. 同じく針状ころ軸受の内輪を示す斜視図である。It is a perspective view which similarly shows the inner ring | wheel of a needle roller bearing. この発明の実施例２に係る軸受付きカムシャフト装置のシャフトの外径面の軸方向にカム駒と針状ころ軸受とが配置状態を拡大して示す縦断面図である。It is a longitudinal cross-sectional view which expands and shows a cam piece and a needle roller bearing in the axial direction of the outer diameter surface of the shaft of the camshaft device with a bearing concerning Example 2 of this invention. 同じく図６のＶＩＩ−ＶＩＩ線に沿う横断面図である。It is a cross-sectional view which similarly follows the VII-VII line of FIG. 同じく針状ころ軸受の内輪を示す斜視図である。It is a perspective view which similarly shows the inner ring | wheel of a needle roller bearing.

符号の説明Explanation of symbols

１１ 軸受付きカムシャフト装置（軸受付きシャフト装置）
１２、１１２ シャフト
１３、１１３ 凹溝
１６ カム駒（駒体）
２０、１２０ 回止め部
３１、１３１ 針状ころ軸受（転がり軸受）
３２、１３２ 内輪
３３、１３３ 軌道面
３４、１３４ 突起 11 Camshaft device with bearing (shaft device with bearing)
12, 112 Shaft 13, 113 Groove 16 Cam piece (frame)
20, 120 Non-rotating part 31, 131 Needle roller bearing (rolling bearing)
32, 132 Inner ring 33, 133 Raceway surface 34, 134 Protrusion

Claims (2)

シャフトと、駒体と、転がり軸受とを備えた軸受付きシャフト装置であって、
前記シャフトの外径面の軸方向に、前記駒体と、前記転がり軸受の内輪とが順次に嵌合されて所定の間隔を保って配置され、
前記シャフトの外径面と前記転がり軸受の内輪との間には、相互に係合して前記シャフトの軸回りに対する前記転がり軸受の内輪の回転を阻止する回止め部が設けられていることを特徴とする軸受付き中空シャフト装置。 A shaft device with a bearing including a shaft, a piece body, and a rolling bearing,
In the axial direction of the outer diameter surface of the shaft, the piece and the inner ring of the rolling bearing are sequentially fitted and arranged at a predetermined interval,
Between the outer diameter surface of the shaft and the inner ring of the rolling bearing, there is provided a locking portion that engages with each other and prevents rotation of the inner ring of the rolling bearing relative to the shaft axis. A featured hollow shaft device with a bearing. 請求項１に記載の軸受付き中空シャフト装置であって、
回止め部は、シャフトの外径面の軸方向に形成された凹溝と、転がり軸受の内輪の内径面から中心側に向けて突出され、かつ前記凹溝に係合して回り止めをなす突起とを有して構成されていることを特徴とする軸受付き中空シャフト装置。 A hollow shaft device with a bearing according to claim 1,
The rotation-preventing portion protrudes from the inner diameter surface of the inner ring of the rolling bearing toward the center side and engages with the concave groove to form a detent in the axial direction of the outer diameter surface of the shaft. A hollow shaft device with a bearing, characterized by comprising a protrusion.
JP2007305789A 2007-11-27 2007-11-27 Shaft device with bearing Pending JP2009127803A (en)

Priority Applications (1)

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JP2007305789A JP2009127803A (en) 2007-11-27 2007-11-27 Shaft device with bearing

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JP2007305789A JP2009127803A (en) 2007-11-27 2007-11-27 Shaft device with bearing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140033860A1 (en) * 2011-04-22 2014-02-06 Jtekt Corporation Balancer shaft device
US12018721B2 (en) 2020-01-27 2024-06-25 Volvo Truck Corporation Rotational lock in inner ring of outboard bearing to avoid lock washer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140033860A1 (en) * 2011-04-22 2014-02-06 Jtekt Corporation Balancer shaft device
EP2700841A1 (en) * 2011-04-22 2014-02-26 JTEKT Corporation Balancer shaft device
EP2700841A4 (en) * 2011-04-22 2014-12-17 Jtekt Corp Balancer shaft device
US9057418B2 (en) * 2011-04-22 2015-06-16 Jtekt Corporation Balancer shaft device
US12018721B2 (en) 2020-01-27 2024-06-25 Volvo Truck Corporation Rotational lock in inner ring of outboard bearing to avoid lock washer

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