JP5050954B2 - Camshaft bearing device - Google Patents

Camshaft bearing device Download PDF

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JP5050954B2
JP5050954B2 JP2008080599A JP2008080599A JP5050954B2 JP 5050954 B2 JP5050954 B2 JP 5050954B2 JP 2008080599 A JP2008080599 A JP 2008080599A JP 2008080599 A JP2008080599 A JP 2008080599A JP 5050954 B2 JP5050954 B2 JP 5050954B2
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camshaft
peripheral surface
housing member
rings
cap member
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JP2009236162A (en
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義孝 早稲田
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JTEKT Corp
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JTEKT Corp
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Priority to JP2008080599A priority Critical patent/JP5050954B2/en
Priority to US12/292,735 priority patent/US20090133528A1/en
Priority to EP10015693A priority patent/EP2302241B1/en
Priority to EP08020443A priority patent/EP2065603B1/en
Publication of JP2009236162A publication Critical patent/JP2009236162A/en
Priority to US13/064,353 priority patent/US8539860B2/en
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この発明はカムシャフトの軸受装置に関する。   The present invention relates to a bearing device for a camshaft.

従来、カムシャフトの軸受装置においては、例えば、特許文献１に開示されているように、複数のカム駒が軸方向に配置されたカムシャフトを、ハウジング部材とキャップ部材との間にすべり軸受に代えてころ軸受を採用してトルク損失を低減するようにしたものがある。
これにおいては、ころ軸受の外輪が二分割されて、ハウジング部材の円弧凹部と、キャップ部材の円弧凹部にそれぞれ組み込まれる。
また、多数のころを保持する保持器には、その周方向の一箇所に割れ目が形成され、カムシャフトの外周から保持器が組み付けられる。
また、カムシャフトには、ころ軸受の軸方向への移動を規制する段差軸部が形成されている。
特開２００７−２４７８７５号公報 Conventionally, in a camshaft bearing device, for example, as disclosed in Patent Document 1, a camshaft in which a plurality of cam pieces are arranged in an axial direction is used as a sliding bearing between a housing member and a cap member. Instead, a roller bearing is used to reduce torque loss.
In this case, the outer ring of the roller bearing is divided into two parts and incorporated into the arc recess of the housing member and the arc recess of the cap member.
In addition, a crack is formed at one place in the circumferential direction of the cage that holds a large number of rollers, and the cage is assembled from the outer periphery of the camshaft.
Further, the camshaft is formed with a step shaft portion that restricts movement of the roller bearing in the axial direction.
JP 2007-247875 A

ところで、前記した従来のカムシャフトの軸受装置におては、ころ軸受の外輪を二分割し、保持器の周方向の一箇所に割れ目を形成し、カムシャフトに段差軸部を形成しなければならず、構造が複雑化する。   By the way, in the conventional camshaft bearing device described above, the outer ring of the roller bearing must be divided into two parts, a crack should be formed at one place in the circumferential direction of the cage, and the step shaft portion should not be formed on the camshaft. Rather, the structure becomes complicated.

この発明の目的は、前記問題点に鑑み、構造が簡単で組付性に優れるカムシャフトの軸受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 camshaft bearing device that is simple in structure and excellent in assembly.

前記目的を達成するために、この発明の請求項１に係るカムシャフトの軸受装置は、複数のカム駒が軸方向に配置されたカムシャフトを、ハウジング部材の円弧凹部とキャップ部材の円弧凹部との間にころ軸受を介して回転可能に支持するカムシャフトの軸受装置であって、
前記カムシャフトの外周面には、同カムシャフトとは別個に形成された環状の第１、第２の規制リングが前記ころ軸受の軸方向両側部に位置してそれぞれ圧入固定され、
前記第１、第２の規制リングの相対する面を滑り面として、これら滑り面が前記ハウジング部材と前記キャップ部材とのそれぞれの両側面に接触することで軸方向の荷重を受ける構成にし、
前記第１、第２の規制リングの外径寸法は、前記ハウジング部材及び前記キャップ部材との間に潤滑油が流入可能な隙間Ｓ１、Ｓ２を隔てるように設定され、
前記隙間Ｓ１は、前記ハウジング部材の円弧凹部の両側に形成された肩部の内周面と前記第１、第２の規制リングの外周面との間に設定され、
前記隙間Ｓ２は、前記キャップ部材の円弧凹部の両側に形成された肩部の内周面と前記第１、第２の規制リングの外周面との間に設定されていることを特徴とする。 In order to achieve the above object, a camshaft bearing device according to claim 1 of the present invention includes a camshaft having a plurality of cam pieces arranged in an axial direction, an arc recess of a housing member, and an arc recess of a cap member. A camshaft bearing device rotatably supported via a roller bearing,
On the outer peripheral surface of the camshaft, annular first and second restricting rings formed separately from the camshaft are respectively press-fitted and fixed on both axial sides of the roller bearing,
With the opposing surfaces of the first and second regulating rings as sliding surfaces, these sliding surfaces are configured to receive axial loads by contacting the both side surfaces of the housing member and the cap member ,
The outer diameter dimensions of the first and second regulating rings are set so as to separate gaps S1 and S2 through which lubricating oil can flow between the housing member and the cap member,
The gap S1 is set between an inner peripheral surface of a shoulder formed on both sides of an arc recess of the housing member and an outer peripheral surface of the first and second regulating rings,
The gap S2 is set between an inner peripheral surface of a shoulder formed on both sides of an arc recess of the cap member and an outer peripheral surface of the first and second regulating rings .

前記構成によると、カムシャフトの外周面の所要とする位置に、ころ軸受と第１、第２の規制リングとをそれぞれ配設する場合、カムシャフトの軸端から第１の規制リングが圧入され、次に、ころ軸受が嵌挿され、最後に第２の規制リングが圧入される。
これによって、カムシャフトの外周面に、ころ軸受と、第１、第２の規制リングとを容易に配置することができる。
そして、ハウジング部材の円弧凹部に、カムシャフト上のころ軸受が設置され、ハウジング部材にキャップ部材が締め付けられることによって、カムシャフトがハウジング部材とキャップ部材との両円弧凹部の間にころ軸受を介して回転可能に組み付けられる。
カムシャフトの組み付け状態において、カムシャフト上の第１、第２の規制リングの相対する滑り面がハウジング部材とキャップ部材とのそれぞれの両側面に接近する。
また、外周面にころ軸受と第１、第２の規制リングとを配置したカムシャフトを運搬したり、あるいは、ハウジング部材に組み付ける際、カムシャフト上のころ軸受の軸方向への過大な移動を第１、第２の規制リングによって止めることができる。このため、ハウジング部材にカムシャフトを組み付ける作業が容易となる。
また、カムシャフトの組み付け状態において、第１、第２の規制リングの相対する滑り面がハウジング部材とキャップ部材とのそれぞれの両側面に接触することで軸方向の荷重を受けることができる。
前記したように、カムシャフトの軸端からころ軸受と第１、第２の規制リングとを所定順に嵌挿して組み付ける簡単な構造によってカムシャフトの軸方向の荷重を受けることができると共に、従来と異なり、ころ軸受の外輪を二分割したり、保持器の周方向の一箇所に割れ目を形成したり、カムシャフトに段差軸部を形成する必要がなく、組み付け性にも優れる。
また、ハウジング部材の円弧凹部の両側に形成された肩部の内周面と第１、第２の規制リングの外周面との間に設定された隙間Ｓ１と、キャップ部材の円弧凹部の両側に形成された肩部の内周面と第１、第２の規制リングの外周面との間に設定された隙間Ｓ２から潤滑油が流入される。 According to the above configuration, when the roller bearing and the first and second restriction rings are respectively disposed at required positions on the outer peripheral surface of the camshaft, the first restriction ring is press-fitted from the shaft end of the camshaft. Next, the roller bearing is inserted and finally the second restriction ring is press-fitted.
Thereby, the roller bearing and the first and second regulating rings can be easily arranged on the outer peripheral surface of the camshaft.
A roller bearing on the camshaft is installed in the arc recess of the housing member, and the cap member is tightened on the housing member, so that the camshaft is interposed between the arc recesses of the housing member and the cap member via the roller bearing. And can be rotated.
In the assembled state of the camshaft, the opposing sliding surfaces of the first and second regulating rings on the camshaft approach both side surfaces of the housing member and the cap member.
In addition, when transporting a camshaft having a roller bearing and first and second restriction rings arranged on the outer peripheral surface or assembling the camshaft to a housing member, excessive movement of the roller bearing on the camshaft in the axial direction is caused. It can be stopped by the first and second restriction rings. For this reason, the operation | work which attaches a cam shaft to a housing member becomes easy.
Further, in the assembled state of the camshaft, the opposing sliding surfaces of the first and second regulating rings come into contact with both side surfaces of the housing member and the cap member, so that an axial load can be received.
As described above, the load in the axial direction of the camshaft can be received by a simple structure in which the roller bearing and the first and second restriction rings are inserted and assembled in a predetermined order from the shaft end of the camshaft. Unlikely, it is not necessary to divide the outer ring of the roller bearing into two parts, to form a crack at one place in the circumferential direction of the cage, or to form a stepped shaft portion on the camshaft, which is excellent in assemblability.
Further, a clearance S1 set between the inner peripheral surface of the shoulder portion formed on both sides of the arc concave portion of the housing member and the outer peripheral surfaces of the first and second regulating rings, and on both sides of the arc concave portion of the cap member. Lubricating oil flows in from the gap S2 set between the inner peripheral surface of the formed shoulder and the outer peripheral surfaces of the first and second regulating rings.

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４にしたがって説明する。
図１はこの発明の実施例１に係るカムシャフトの軸受装置を示す縦断面図である。図２は図１のＩＩ−ＩＩ線に基づく横断面図である。図３はカムシャフトにころ軸受と第１、第２の規制リングを組み付ける前の状態を示す説明図である。図４はハウジング部材とキャップ部材との間にカムシャフトを組み付ける前の状態を示す説明図である。 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 bearing device according to Embodiment 1 of the present invention. 2 is a cross-sectional view based on the line II-II in FIG. FIG. 3 is an explanatory view showing a state before the roller bearing and the first and second regulating rings are assembled to the camshaft. FIG. 4 is an explanatory view showing a state before the camshaft is assembled between the housing member and the cap member.

図１と図２に示すように、カムシャフトの軸受装置は、カムシャフト１１と、ころ軸受２０と、第１、第２の規制リング３０、３５と、ハウジング部材４０と、キャップ部材５０とを備えている。
カムシャフト１１の外周面の軸方向には複数のカム駒１４が配置されている。また、カムシャフト１１の外周面の隣接するカム駒１４の間には軸受（転がり軸受、又は滑り軸受）１５が必要に応じて配設される。 As shown in FIGS. 1 and 2, the camshaft bearing device includes a camshaft 11, a roller bearing 20, first and second restriction rings 30 and 35, a housing member 40, and a cap member 50. I have.
A plurality of cam pieces 14 are arranged in the axial direction of the outer peripheral surface of the camshaft 11. A bearing (rolling bearing or sliding bearing) 15 is disposed between the adjacent cam pieces 14 on the outer peripheral surface of the camshaft 11 as necessary.

図１に示すように、カムシャフト１１の一端寄り部分の外周面には、ころ軸受２０と、第１、第２の規制リング３０、３５が組み付けられる。
図１〜図４に示すように、ころ軸受（シェル形の針状ころ軸受も含む）２０は、外輪２１と、カムシャフト１１の外周面を内輪軌道面１２とする多数のころ（針状ころも含む）２５と、これら多数のころ２５を保持する保持器２６とを備えている。
そして、ころ軸受２０はカムシャフト１１の軸端からカムシャフト１１の外周面の所定位置まで嵌挿される。 As shown in FIG. 1, a roller bearing 20 and first and second regulating rings 30 and 35 are assembled on the outer peripheral surface of the camshaft 11 near one end.
As shown in FIGS. 1 to 4, a roller bearing (including a shell-shaped needle roller bearing) 20 includes an outer ring 21 and a number of rollers (needle rollers) having an outer peripheral surface of the camshaft 11 as an inner ring raceway surface 12. 25) and a cage 26 for holding these many rollers 25.
The roller bearing 20 is inserted from the shaft end of the camshaft 11 to a predetermined position on the outer peripheral surface of the camshaft 11.

第１、第２の規制リング３０、３５は、カムシャフト１１とは別個に、鋼鉄、非鉄、合成樹脂等より環状に形成され、カムシャフト１１の外周面のころ軸受２０の軸方向両側部に位置してそれぞれ圧入固定されている。
また、カムシャフト１１の外周面に圧入固定された第１、第２の規制リング３０、３５の相対する面の間隔寸法は、次に述べるハウジング部材４０の両側面４２の距離寸法（又はキャップ部材５０の両側面５２の距離寸法）よりも若干大きく設定されている。そして、第１、第２の規制リング３０、３５の相対する面を、ハウジング部材４０の両側面４２及びキャップ部材５０の両側面５２に対する滑り面３１、３６としている。
また、第１、第２の規制リング３０、３５の外径寸法は、これら第１、第２の規制リング３０、３５の外周面とハウジング部材４０及びキャップ部材５０との間に潤滑油が流入可能な隙間Ｓ１、Ｓ２を隔てるように設定されている（図１参照）。
なお、第１、第２の規制リング３０、３５は、鋼鉄製のシャフト１１に圧入傷を抑制するためにカムシャフト１１よりも硬度が小さい材料によって形成されることが望ましい。 The first and second regulating rings 30 and 35 are formed in an annular shape from steel, non-ferrous metal, synthetic resin, etc. separately from the camshaft 11, and are provided on both sides in the axial direction of the roller bearing 20 on the outer peripheral surface of the camshaft 11. It is positioned and press-fitted and fixed.
The distance between the opposing surfaces of the first and second regulating rings 30 and 35 press-fitted and fixed to the outer peripheral surface of the camshaft 11 is the distance between the two side surfaces 42 of the housing member 40 (or a cap member) described below. 50 is set to be slightly larger than the distance dimension of the two side surfaces 52. The opposing surfaces of the first and second regulating rings 30 and 35 are the sliding surfaces 31 and 36 with respect to both side surfaces 42 of the housing member 40 and both side surfaces 52 of the cap member 50.
Further, the outer diameter of the first and second regulating rings 30 and 35 is such that the lubricating oil flows between the outer peripheral surface of the first and second regulating rings 30 and 35 and the housing member 40 and the cap member 50. The gaps S1 and S2 are set as possible (see FIG. 1).
The first and second regulating rings 30 and 35 are preferably formed of a material having a hardness lower than that of the camshaft 11 in order to suppress press-fitting on the steel shaft 11.

一方、内燃機関のシリンダヘッド部をなすハウジング部材４０の上面のシャフト組付け部分は、軸方向の中央部が小径で両側が大径の段差凹円弧をなし、その中央部内面には、ころ軸受２０の外輪２１の外径とほぼ同じ大きさの半円弧をなす円弧凹部４１が形成され、両側の肩部４５の内周面と第１、第２の規制リング３０、３５の外周面との間には前記した隙間Ｓ１が設定されている。
さらに、図４に示すように、シャフト組付け部分には円弧凹部４１の両端部に位置してキャップ部材５０を締め付けるためのボルト６０がねじ込まれる雌ねじ４７が形成されている。 On the other hand, the shaft assembly portion on the upper surface of the housing member 40 that forms the cylinder head portion of the internal combustion engine forms a stepped concave arc having a small central diameter in the axial direction and a large diameter on both sides. A circular arc recess 41 having a semicircular arc having the same size as the outer diameter of the outer ring 21 is formed, and the inner peripheral surface of the shoulder 45 on both sides and the outer peripheral surfaces of the first and second regulating rings 30 and 35 are formed. The above-described gap S1 is set between them.
Furthermore, as shown in FIG. 4, female threads 47 are formed in the shaft assembly portion, which are positioned at both ends of the arc recess 41 and into which bolts 60 for tightening the cap member 50 are screwed.

一方、キャップ部材５０においても、ハウジング部材４０のシャフト組付け部分と同様にして軸方向の中央部が小径で両側が大径の段差凹円弧をなし、その中央部内面には、ころ軸受２０の外輪２１の外径とほぼ同じ大きさの半円弧をなす円弧凹部５１が形成され、両側の肩部５５の内周面と第１、第２の規制リング３０、３５の外周面との間には前記した隙間Ｓ２が設定されている。
また、図４に示すように、キャップ部材５０には、その円弧凹部５１の両端部にボルト６０が挿通される貫通孔５７を有する取付片５６が形成されている。 On the other hand, in the cap member 50, similarly to the shaft assembly portion of the housing member 40, a stepped concave arc having a small central diameter in the axial direction and a large diameter on both sides is formed. A circular arc recess 51 having a semicircular arc having the same size as the outer diameter of the outer ring 21 is formed, and between the inner peripheral surface of the shoulder 55 on both sides and the outer peripheral surfaces of the first and second regulating rings 30 and 35. Is set with the above-described gap S2.
As shown in FIG. 4, the cap member 50 is formed with attachment pieces 56 having through holes 57 through which the bolts 60 are inserted at both ends of the circular arc recess 51.

上述したように構成されるこの実施例１に係るカムシャフトの軸受装置において、図３に示すように、カムシャフト１１とは別個に形成された第１、第２の規制リング３０、３５ところ軸受２０とをカムシャフト１１の外周面の所要とする位置に配設する場合、カムシャフト１１の軸端から第１の規制リング３０が圧入され、次に、ころ軸受２０が嵌挿され、最後に第２の規制リング３５が圧入される。
なお、カムシャフト１１の軸上には、予め複数のカム駒１４が配置される。 In the camshaft bearing device according to the first embodiment configured as described above, as shown in FIG. 3, first and second regulating rings 30 and 35 are formed separately from the camshaft 11. 20 is disposed at a required position on the outer peripheral surface of the camshaft 11, the first restriction ring 30 is press-fitted from the shaft end of the camshaft 11, and then the roller bearing 20 is inserted, and finally The second restriction ring 35 is press-fitted.
A plurality of cam pieces 14 are arranged on the camshaft 11 in advance.

前記したように、外周面の所定位置に、複数のカム駒１４と、ころ軸受２０と、第１、第２の規制リング３０、３５とを配置してユニット化されたカムシャフト１１を、ハウジング部材４０とキャップ部材５０との間に回転可能に組み付ける場合、先ず、ハウジング部材４０の円弧凹部４１に、カムシャフト１１上のころ軸受２０がその外輪２１において設置される（図２及び図４参照）。
ここで、ハウジング部材４０にキャップ部材５０がボルト６０によって締め付けられることによって、カムシャフト１１がハウジング部材４０とキャップ部材５０との両円弧凹部４１、５１の間にころ軸受２０を介して回転可能に組み付けられる。 As described above, the camshaft 11, which is unitized by arranging the plurality of cam pieces 14, the roller bearing 20, and the first and second restriction rings 30 and 35 at predetermined positions on the outer peripheral surface, In the case where the member 40 and the cap member 50 are rotatably assembled, first, the roller bearing 20 on the camshaft 11 is installed on the outer ring 21 in the circular arc recess 41 of the housing member 40 (see FIGS. 2 and 4). ).
Here, when the cap member 50 is fastened to the housing member 40 by the bolt 60, the camshaft 11 is rotatable between the circular arc concave portions 41 and 51 of the housing member 40 and the cap member 50 via the roller bearing 20. Assembled.

図１に示すように、カムシャフト１１の組み付け状態において、カムシャフト１１上の第１、第２の規制リング３０、３５の相対する滑り面３１、３６がハウジング部材４０の両側面４２とキャップ部材５０の両側面５２に接近して配置される。
また、複数のカム駒１４と、ころ軸受２０と、第１、第２の規制リング３０、３５とを配置してユニット化されたカムシャフト１１を運搬したり、あるいは、ハウジング部材４０に組み付ける際、カムシャフト１１のころ軸受２０の軸方向への過大な移動を第１、第２の規制リング３０、３５によって止めることができる。このため、ハウジング部材４０にカムシャフト１１を組み付ける作業が容易となる。 As shown in FIG. 1, in the assembled state of the camshaft 11, the opposed sliding surfaces 31, 36 of the first and second regulating rings 30, 35 on the camshaft 11 are formed on both side surfaces 42 of the housing member 40 and the cap member. 50 is arranged close to both side surfaces 52.
Further, when the camshaft 11 unitized by arranging the plurality of cam pieces 14, the roller bearings 20, and the first and second restriction rings 30 and 35, or when assembled to the housing member 40 The excessive movement of the camshaft 11 in the axial direction of the roller bearing 20 can be stopped by the first and second regulating rings 30 and 35. For this reason, the operation | work which assembles the cam shaft 11 to the housing member 40 becomes easy.

また、カムシャフト１１の軸受け回転時等において、第１、第２の規制リング３０、３５の両滑り面３１、３６がハウジング部材４０の両側面４２並びにキャップ部材５０の両側面５２に接触することで軸方向の荷重（スラスト荷重）を受けることができる。   Further, when the bearing of the camshaft 11 is rotated, the sliding surfaces 31 and 36 of the first and second regulating rings 30 and 35 are in contact with both side surfaces 42 of the housing member 40 and both side surfaces 52 of the cap member 50. Can receive axial load (thrust load).

（実施例２）
次に、この発明の実施例２を図５にしたがって説明する。
図５はこの発明の実施例２に係るカムシャフトの軸受装置を示す縦断面図である。
図５に示すように、この実施例２においては、ハウジング部材１４０の上面のシャフト組付け部分の軸方向の中央部に形成された円弧凹部１４１の両側部に中心側に突出する環状壁１４５が形成されている。
一方、キャップ部材１５０においても、軸方向の中央部の円弧凹部１５１の両側部に中心側に突出する環状壁１５５が形成されている。
ころ軸受１２０と第１、第２の規制リング１３０、１３５は実施例１と同様にしてカムシャフト１１１の外周面に組み付けられる。
そして、図５に示すように、ハウジング部材１４０にカムシャフト１１１が組み付けられた状態においては、カムシャフト１１１上の第１、第２の規制リング１３０、１３５の相対する滑り面１３１、１３６がハウジング部材１４０の両環状壁１４５の側面１４２とキャップ部材１５０の両環状壁１５５の側面１５２に接近して配置される。
したがって、この実施例２においても、実施例１と同様の作用効果を奏する。 (Example 2)
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a longitudinal sectional view showing a camshaft bearing device according to Embodiment 2 of the present invention.
As shown in FIG. 5, in the second embodiment, annular walls 145 projecting toward the center are formed on both side portions of the circular arc recess 141 formed in the center portion in the axial direction of the shaft assembly portion on the upper surface of the housing member 140. Is formed.
On the other hand, in the cap member 150, annular walls 155 that protrude toward the center are formed on both sides of the circular arc recess 151 in the central portion in the axial direction.
The roller bearing 120 and the first and second regulating rings 130 and 135 are assembled to the outer peripheral surface of the camshaft 111 in the same manner as in the first embodiment.
As shown in FIG. 5, when the camshaft 111 is assembled to the housing member 140, the sliding surfaces 131 and 136 facing each other of the first and second regulating rings 130 and 135 on the camshaft 111 are the housing. The side surfaces 142 of both annular walls 145 of the member 140 and the side surfaces 152 of both annular walls 155 of the cap member 150 are disposed close to each other.
Therefore, also in this Example 2, there exists an effect similar to Example 1. FIG.

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。   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.

この発明の実施例１に係るカムシャフトの軸受装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the bearing apparatus of the camshaft which concerns on Example 1 of this invention. 同じく図１のＩＩ−ＩＩ線に基づく横断面図である。It is a transverse cross section similarly based on the II-II line of FIG. 同じくカムシャフトにころ軸受と第１、第２の規制リングを組み付ける前の状態を示す説明図である。It is explanatory drawing which shows the state before attaching a roller bearing and a 1st, 2nd control ring to a camshaft similarly. 同じくハウジング部材とキャップ部材との間にカムシャフトを組み付ける前の状態を示す説明図である。It is explanatory drawing which shows the state before a camshaft is similarly assembled | attached between a housing member and a cap member. この発明の実施例２に係るカムシャフトの軸受装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the camshaft bearing apparatus which concerns on Example 2 of this invention.

符号の説明Explanation of symbols

１１、１１１ カムシャフト
１２ 内輪軌道面
１４ カム駒
２０、１２０ ころ軸受
２１ 外輪
２５ ころ
３０、１３０ 第１の規制リング
３１、１３１ 滑り面
３５、１３５ 第２の規制リング
３６、１３６ 滑り面
４０、１４０ ハウジング部材
４１、１４１ 円弧凹部
４２、１４２ 側面
５０、１５０ キャップ部材
５１、１５１ 円弧凹部
５２、１５２ 側面
DESCRIPTION OF SYMBOLS 11, 111 Camshaft 12 Inner ring raceway surface 14 Cam piece 20, 120 Roller bearing 21 Outer ring 25 Roller 30, 130 First regulating ring 31, 131 Sliding surface 35, 135 Second regulating ring 36, 136 Sliding surface 40, 140 Housing member 41, 141 Arc recess 42, 142 Side surface 50, 150 Cap member 51, 151 Arc recess 52, 152 Side surface

Claims (1)

複数のカム駒が軸方向に配置されたカムシャフトを、ハウジング部材の円弧凹部とキャップ部材の円弧凹部との間にころ軸受を介して回転可能に支持するカムシャフトの軸受装置であって、
前記カムシャフトの外周面には、同カムシャフトとは別個に形成された環状の第１、第２の規制リングが前記ころ軸受の軸方向両側部に位置してそれぞれ圧入固定され、
前記第１、第２の規制リングの相対する面を滑り面として、これら滑り面が前記ハウジング部材と前記キャップ部材とのそれぞれの両側面に接触することで軸方向の荷重を受ける構成にし、
前記第１、第２の規制リングの外径寸法は、前記ハウジング部材及び前記キャップ部材との間に潤滑油が流入可能な隙間Ｓ１、Ｓ２を隔てるように設定され、
前記隙間Ｓ１は、前記ハウジング部材の円弧凹部の両側に形成された肩部の内周面と前記第１、第２の規制リングの外周面との間に設定され、
前記隙間Ｓ２は、前記キャップ部材の円弧凹部の両側に形成された肩部の内周面と前記第１、第２の規制リングの外周面との間に設定されていることを特徴とするカムシャフトの軸受装置。 A camshaft bearing device that rotatably supports a camshaft having a plurality of cam pieces arranged in an axial direction via a roller bearing between an arc recess of a housing member and an arc recess of a cap member,
On the outer peripheral surface of the camshaft, annular first and second restricting rings formed separately from the camshaft are respectively press-fitted and fixed on both axial sides of the roller bearing,
With the opposing surfaces of the first and second regulating rings as sliding surfaces, these sliding surfaces are configured to receive axial loads by contacting the both side surfaces of the housing member and the cap member ,
The outer diameter dimensions of the first and second regulating rings are set so as to separate gaps S1 and S2 through which lubricating oil can flow between the housing member and the cap member,
The gap S1 is set between an inner peripheral surface of a shoulder formed on both sides of an arc recess of the housing member and an outer peripheral surface of the first and second regulating rings,
The gap S2 is set between an inner peripheral surface of a shoulder portion formed on both sides of an arc recess of the cap member and an outer peripheral surface of the first and second restricting rings. Shaft bearing device.
JP2008080599A 2007-11-27 2008-03-26 Camshaft bearing device Expired - Fee Related JP5050954B2 (en)

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JP2008080599A JP5050954B2 (en) 2008-03-26 2008-03-26 Camshaft bearing device
US12/292,735 US20090133528A1 (en) 2007-11-27 2008-11-25 Shaft apparatus with bearing
EP10015693A EP2302241B1 (en) 2007-11-27 2008-11-25 Shaft apparatus with roller bearing
EP08020443A EP2065603B1 (en) 2007-11-27 2008-11-25 Shaft apparatus with roller bearing
US13/064,353 US8539860B2 (en) 2007-11-27 2011-03-21 Shaft apparatus with bearing

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