JPH09242511A - Thrust bearing structure for cam shaft - Google Patents

Thrust bearing structure for cam shaft

Info

Publication number
JPH09242511A
JPH09242511A JP4924496A JP4924496A JPH09242511A JP H09242511 A JPH09242511 A JP H09242511A JP 4924496 A JP4924496 A JP 4924496A JP 4924496 A JP4924496 A JP 4924496A JP H09242511 A JPH09242511 A JP H09242511A
Authority
JP
Japan
Prior art keywords
bearing member
flange
cam shaft
thrust bearing
sliding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4924496A
Other languages
Japanese (ja)
Inventor
Akira Iijima
章 飯島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Priority to JP4924496A priority Critical patent/JPH09242511A/en
Publication of JPH09242511A publication Critical patent/JPH09242511A/en
Pending legal-status Critical Current

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  • Valve-Gear Or Valve Arrangements (AREA)
  • Sliding-Contact Bearings (AREA)
  • Support Of The Bearing (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of vibration and noise due to a collision of a cam shaft, and to prevent the abrasion of a sliding part. SOLUTION: In the thrust bearing structure of a cam shaft, a pair of flanges 3, 4 are provided in a cam shaft 1, which is supported by a bearing member 2 so that the bearing member 2 is positioned between them, and the predetermined clearance 16 is provided between at least one of the flanges 3, 4 and the bearing member 2 along the longitudinal direction of the cam shaft. A thrust bearing member 17, which has fixation parts 18a, 18b fixed to the bearing member 2 and which has a thrust bearing member 17 having the fixation part 18a, 18b fixed to the bearing member 2 and which has a sliding part 21 having a sliding surface along the flange surfaces 3a, 4a of the flanged 3, 4 and which has spring parts 20a, 20b for connecting the fixation parts 18a, 18b and the sliding part 21 and for pushing the sliding surface to the flange surfaces 3a, 4a for surface contact, is provided.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、エンジンのカム軸
をその長手方向に支持するためのスラスト軸受構造に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust bearing structure for supporting a camshaft of an engine in its longitudinal direction.

【0002】[0002]

【従来の技術】図5は、従来のカム軸の支持部周辺を示
す縦断面図である。図示するようにカム軸aは、その長
手方向適宜間隔毎に軸受部材bによって回転可能に支持
される(一つのみ図示)。軸受部材bは、シリンダヘッ
ドcに一体的に設けられた軸受部dと、この上部にボル
ト締結されるベアリングキャップeとからなる。そして
これらでカム軸aを挟持するようにすれば、カム軸aが
挿通穴fに挿通されて支持されるようになる。
2. Description of the Related Art FIG. 5 is a longitudinal sectional view showing the periphery of a conventional cam shaft supporting portion. As illustrated, the cam shaft a is rotatably supported by bearing members b at appropriate intervals in the longitudinal direction (only one is shown). The bearing member b includes a bearing portion d that is integrally provided on the cylinder head c, and a bearing cap e that is bolted to the upper portion of the bearing portion d. If the cam shaft a is sandwiched by these, the cam shaft a is inserted into the insertion hole f and supported.

【0003】カム軸aは、軸受部材bを間に位置させて
一対のフランジ部g,hを有している。一方のフランジ
部gはカム軸a自身に一体成形され、他方のフランジ部
hは、カム軸aの端部にボルトで固定されたカムギヤi
によって形成されている。これらフランジ部g,hが、
特にベアリングキャップeを挟持するようにし、カム軸
aの長手方向(スラスト方向)への移動を規制すること
になる。
The cam shaft a has a pair of flange portions g and h with a bearing member b positioned therebetween. One flange part g is integrally formed with the cam shaft a itself, and the other flange part h is a cam gear i fixed to the end of the cam shaft a with a bolt.
Is formed by These flange parts g and h are
In particular, the bearing cap e is sandwiched so that the movement of the cam shaft a in the longitudinal direction (thrust direction) is restricted.

【0004】特に、カム軸長手方向に沿うフランジ部
g,h間の間隔は、軸受部dより幅広のベアリングキャ
ップeの幅より僅かながら(40μm程度)大きくされ、
これによって出来る僅かな隙間がカム軸aの円滑な回転
を可能とする。
In particular, the interval between the flange portions g and h along the longitudinal direction of the cam shaft is slightly larger (about 40 μm) than the width of the bearing cap e wider than the bearing portion d,
This allows a slight clearance to allow the cam shaft a to rotate smoothly.

【0005】[0005]

【発明が解決しようとする課題】ところで、カムギヤi
には噛合率を高めるためヘリカルギヤが採用されてお
り、このためカム軸aは駆動時にスラスト力を受け、上
記隙間の範囲内で移動するようになる。このため、フラ
ンジ部g,hがベアリングキャップeに衝突し、これに
基づく振動や騒音が発生する問題がある。
By the way, the cam gear i
A helical gear is used to increase the meshing ratio of the camshaft a, so that the camshaft a receives a thrust force during driving and moves within the range of the clearance. Therefore, there is a problem in that the flange portions g and h collide with the bearing cap e, which causes vibration and noise.

【0006】一方、実開昭62-705号公報においては、隙
間を比較的大きくしてそこに皿ばねを設け、スラスト力
を吸収しつつ直接衝突を防止するようにしている。しか
し、隙間が寸法公差やカム軸の移動に基づいて増減し、
これに応じて皿ばねが変形すると、図6に示すように、
皿ばねjが互いの摺動面k,lに対し線当たりとなり、
面圧が高くなって摩耗が顕著となる欠点がある。なお、
同公報に開示されているウェーブワッシャについても同
様である。
On the other hand, in Japanese Utility Model Laid-Open No. 62-705, a gap is made relatively large and a disc spring is provided there to absorb a thrust force and prevent a direct collision. However, the gap increases or decreases based on dimensional tolerances and camshaft movement,
When the disc spring is deformed accordingly, as shown in FIG.
The disc spring j comes into line contact with the sliding surfaces k and l of each other,
There is a drawback that the surface pressure becomes high and the wear becomes remarkable. In addition,
The same applies to the wave washer disclosed in the publication.

【0007】[0007]

【課題を解決するための手段】本発明に係るカム軸のス
ラスト軸受構造は、軸受部材に支持されたカム軸に、上
記軸受部材を間に位置させて一対のフランジ部を設け、
そのうち少なくとも一方のフランジ部と上記軸受部材と
の間に、カム軸長手方向に沿う所定間隔の隙間を設ける
と共に、この隙間に、上記軸受部材に固定される固定部
と、上記フランジ部のフランジ面に沿う摺動面を有した
摺動部と、上記固定部及び摺動部を連結して上記摺動面
を上記フランジ面に押圧し面接触させるばね部とを有す
るスラスト軸受部材を設けたものである。
In a thrust bearing structure for a cam shaft according to the present invention, a pair of flange portions are provided on a cam shaft supported by a bearing member with the bearing member positioned between them.
At least one of the flange portions and the bearing member are provided with a gap at a predetermined interval along the camshaft longitudinal direction, and in this gap, a fixing portion fixed to the bearing member and a flange surface of the flange portion. Provided with a thrust bearing member having a sliding portion having a sliding surface along with, and a spring portion that connects the fixed portion and the sliding portion to press the sliding surface against the flange surface to make surface contact. Is.

【0008】これによれば、スラスト軸受部材にあっ
て、ばね部がカム軸のスラスト力を弾性変形により吸収
し、直接衝突を防止する。一方摺動部の摺動面は、ばね
部に押圧されてフランジ面に面接触するので、これによ
って面圧を下げられ、摩耗を防止できる。
According to this, in the thrust bearing member, the spring portion absorbs the thrust force of the cam shaft by elastic deformation and prevents a direct collision. On the other hand, the sliding surface of the sliding portion is pressed by the spring portion and comes into surface contact with the flange surface, so that the surface pressure can be reduced and wear can be prevented.

【0009】[0009]

【発明の実施の形態】以下本発明の好適な実施の形態を
添付図面に基づいて詳述する。
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

【0010】図1は、本発明に係るカム軸のスラスト軸
受構造を示す縦断面図である。1はDOHCエンジンの
シリンダ列方向に延出された一方のカム軸で、図はカム
軸1の一端部における支持部周辺を示している。カム軸
1は、軸受部材2によって回転可能に支持されると共
に、この軸受部材2を間に位置させてカム軸長手方向に
離間された一対のフランジ部3,4を有している。図中
右側のフランジ部3はカム軸1に一体的に形成され、図
中左側のフランジ部4は、カム軸1の端面にボルト5及
びワッシャ6で取り付けられたカムギヤ7によって形成
される。カムギヤ7はヘリカルギヤからなり、シリンダ
ヘッド8に対し側方外部に露出されると共に、図示しな
いもう一方のカム軸のヘリカルギヤに噛合され、エンジ
ンのクランク軸出力により回転駆動されるようになって
いる。
FIG. 1 is a vertical sectional view showing a thrust bearing structure for a camshaft according to the present invention. Reference numeral 1 denotes one cam shaft extending in the cylinder row direction of the DOHC engine, and the drawing shows the periphery of a support portion at one end of the cam shaft 1. The cam shaft 1 is rotatably supported by a bearing member 2, and has a pair of flange portions 3 and 4 which are spaced from each other in the cam shaft longitudinal direction with the bearing member 2 therebetween. The flange portion 3 on the right side in the drawing is formed integrally with the cam shaft 1, and the flange portion 4 on the left side in the drawing is formed by a cam gear 7 attached to the end surface of the cam shaft 1 with bolts 5 and washers 6. The cam gear 7 is composed of a helical gear, is exposed to the outside laterally with respect to the cylinder head 8, is meshed with the helical gear of the other cam shaft (not shown), and is rotationally driven by the crankshaft output of the engine.

【0011】軸受部材2は、シリンダヘッド8に設けら
れた軸受部9と、軸受部9の上部に固定されるベアリン
グキャップ10とから主に構成される。図2も参照し
て、ベアリングキャップ10は、カム軸1に対し図2の
右側と左側とでボルト11により固定される。なおここ
ではベアリングキャップ10のボルト取付部の高さが右
側(10a)と左側(10b)とで異なっている。
The bearing member 2 is mainly composed of a bearing portion 9 provided on the cylinder head 8 and a bearing cap 10 fixed to the upper portion of the bearing portion 9. Referring also to FIG. 2, the bearing cap 10 is fixed to the cam shaft 1 by bolts 11 on the right side and the left side of FIG. Here, the height of the bolt mounting portion of the bearing cap 10 is different between the right side (10a) and the left side (10b).

【0012】軸受部9とベアリングキャップ10とは、
互いに対向する断面半円状の溝12を有し、これら溝1
2同士を突き合わせることにより、カム軸1の支持部1
3を挿通させる挿通穴14を形成するようになってい
る。そして溝12の内面には比較的薄肉の滑り軸受15
が配設され、この滑り軸受15に実質的に支持されてカ
ム軸1は回転できるようになる。
The bearing portion 9 and the bearing cap 10 are
It has grooves 12 having a semicircular cross section that face each other.
The support portion 1 of the cam shaft 1 is formed by abutting the two.
An insertion hole 14 for inserting 3 is formed. The inner surface of the groove 12 has a relatively thin sliding bearing 15
Is provided and is substantially supported by the plain bearing 15, so that the cam shaft 1 can rotate.

【0013】軸受部9とベアリングキャップ10とは、
カム軸長手方向に沿う厚さがここでは同一に形成され、
カム軸1のフランジ部3,4間の距離はその厚さより大
きい。従って、軸受部9又はベアリングキャップ10と
フランジ部3,4との間には、カム軸長手方向に沿う所
定間隔の隙間16が形成されることになる。特に隙間1
6は、軸受部9又はベアリングキャップ10のカム軸長
手方向両側に設けられる。そしてこれら隙間16に、詳
しくはベアリングキャップ10とフランジ部3,4とが
なす上半分の隙間16に、後述するスラスト軸受部材1
7が配設されることとなる。
The bearing portion 9 and the bearing cap 10 are
The thickness along the longitudinal direction of the cam shaft is formed here in the same manner,
The distance between the flange portions 3 and 4 of the cam shaft 1 is larger than its thickness. Therefore, a gap 16 is formed between the bearing portion 9 or the bearing cap 10 and the flange portions 3 and 4 at a predetermined interval along the longitudinal direction of the cam shaft. Especially the gap 1
6 are provided on both sides of the bearing portion 9 or the bearing cap 10 in the longitudinal direction of the cam shaft. Then, in the gaps 16, more specifically, in the gaps 16 in the upper half formed by the bearing cap 10 and the flange portions 3 and 4, the thrust bearing member 1 described later is provided.
7 will be provided.

【0014】なお、以上の構成は、エンジンの各シリン
ダ間や他端部におけるカム軸支持部に対しても可能であ
る。ただし、他方の端部においてはカムギヤ7が設けら
れず、別のフランジ部(例えばワッシャによる)が設け
られることになる。また上述の構成においては、ベアリ
ングキャップ10を軸受部9と同一厚さに加工して、図
5に示した従来品を流用している。このことによって低
コスト化を図れ、既存のものへの適用も可能となる。
The above construction is also possible for the camshaft support portions between the cylinders of the engine and at the other end portion. However, the cam gear 7 is not provided at the other end portion, and another flange portion (for example, by a washer) is provided. Further, in the above-mentioned configuration, the bearing cap 10 is processed to have the same thickness as the bearing portion 9, and the conventional product shown in FIG. 5 is diverted. This makes it possible to reduce the cost and apply it to existing ones.

【0015】次に、図3はかかるスラスト軸受部材17
を示し、(a)は平面図、(b)は正面図、(c)は側
面図である。なお図3(b)において、紙面手前側を前
側、紙面奥側を後側、左側及び右側をそれぞれ左側及び
右側というものとする。
Next, FIG. 3 shows such thrust bearing member 17
Is a plan view, (b) is a front view, and (c) is a side view. In FIG. 3B, the front side of the paper surface is the front side, the back side of the paper surface is the rear side, and the left side and the right side are the left side and the right side, respectively.

【0016】図示するように、スラスト軸受部材17
は、比較的弾性に富むばね材料等の金属板により一体成
形されている。スラスト軸受部材17は、ベアリングキ
ャップ10のボルト取付部10a,10bに、上記ボル
ト11で共締めされる一対の固定部18a,18bを有
している。各固定部18a,18bは各ボルト取付部1
0a,10bに対応して高さが異なっており、各固定部
18a,18bにはボルト11を挿通させるための穴1
9a,19bがそれぞれ形成される。また各固定部18
a,18bの前後側端縁部はそれぞれ下方に折曲され、
これによって各固定部18a,18bは上記各ボルト取
付部10a,10bの上面部に被さって係合し、確実に
位置決めされるようになっている。
As shown, the thrust bearing member 17
Is integrally formed of a metal plate such as a spring material having a relatively high elasticity. The thrust bearing member 17 has a pair of fixing portions 18a and 18b, which are fastened together with the bolts 11, on the bolt mounting portions 10a and 10b of the bearing cap 10. Each fixing portion 18a, 18b is a bolt mounting portion 1
0a and 10b have different heights, and holes 1 for inserting the bolts 11 are inserted into the respective fixing portions 18a and 18b.
9a and 19b are formed, respectively. In addition, each fixed portion 18
The front and rear edges of a and 18b are bent downward,
As a result, the fixing portions 18a and 18b cover and engage with the upper surface portions of the bolt mounting portions 10a and 10b, respectively, and the positioning is ensured.

【0017】各固定部18a,18bの前後側端縁部か
らは、脚状のばね部20a,20bが前後側に開くよう
にして斜め下方に延出されている。そして前後側それぞ
れにおいて、ばね部20a,20bの下端同士を結ぶ摺
動部21が設けられる。つまりばね部20a,20b
は、各固定部18a,18bと摺動部21とを連結して
いる。なお左側のばね部20bは、摺動部21を避ける
ようにクランク状に湾曲されている。
Leg-shaped spring portions 20a and 20b extend obliquely downward from the front and rear side edge portions of the fixed portions 18a and 18b so as to open to the front and rear sides. A sliding portion 21 that connects the lower ends of the spring portions 20a and 20b is provided on each of the front and rear sides. That is, the spring portions 20a, 20b
Connects the fixed portions 18a and 18b to the sliding portion 21. The left spring portion 20b is curved in a crank shape so as to avoid the sliding portion 21.

【0018】摺動部21は上方に向かう半環状に形成さ
れ、斜めのばね部20a,20bから垂直ないし鉛直方
向に起こされると共に、その前方或いは後方に臨む面が
上記フランジ部3,4と摺動する所定面積を有した摺動
面22となる。詳しくは図1に示すように、フランジ部
3,4は、それら対向面が環状のフランジ面3a,4a
となっており、摺動面22は、それらフランジ面3a,
4aの上半分の部分に沿って半環状に延出されている。
The sliding portion 21 is formed in a semi-annular shape directed upward, is raised vertically or vertically from the oblique spring portions 20a, 20b, and its front or rear surface slides on the flange portions 3, 4. The sliding surface 22 has a predetermined area to move. More specifically, as shown in FIG. 1, the flange portions 3 and 4 are such that their opposing surfaces are annular flange surfaces 3a and 4a.
And the sliding surface 22 is the flange surface 3a,
A semi-annular shape extends along the upper half of 4a.

【0019】図3に戻って、摺動部21の下端縁部は前
後側に閉じるように折曲され、この折曲部分により、詳
しくは後述するが、摺動面22及びフランジ面3a,4
a間に潤滑油を迎え入れるための傾斜部23a,23b
が形成される。そして摺動部21の上端縁部にも、潤滑
油を貯留するための半円状の凹部24が形成される。次
にかかる形態の作用について説明する。
Returning to FIG. 3, the lower end edge of the sliding portion 21 is bent so as to close to the front and rear sides, and due to this bent portion, the sliding surface 22 and the flange surfaces 3a, 4 will be described in detail later.
Inclined portions 23a and 23b for receiving the lubricating oil between a and
Is formed. A semi-circular recess 24 for storing lubricating oil is also formed on the upper edge of the sliding portion 21. Next, the operation of this mode will be described.

【0020】図1,図2に示すように、上記スラスト軸
受部材17は、前述したように各固定部18a,18b
をベアリングキャップ10上に被せてボルト11で固定
し、摺動部21及びばね部20a,20bを、ベアリン
グキャップ10とフランジ部3,4とがなす上半分の隙
間16に挿入して使用される。こうすると、ばね部20
a,20bがベアリングキャップ10を跨ぐようにな
り、摺動部21はばね部20a,20bの弾発力により
フランジ部3,4に押圧され、摺動面22はフランジ面
3a,4aに完全に面接触するようになる。そして両フ
ランジ部3,4が受ける押圧力で、カム軸1は、フラン
ジ部3,4の中間位置と軸受部材2の幅中心位置が一致
するよう、スラスト方向に自ずと位置決めされる。
As shown in FIGS. 1 and 2, the thrust bearing member 17 includes the fixed portions 18a and 18b as described above.
Used by inserting the sliding portion 21 and the spring portions 20a and 20b into the upper half gap 16 formed by the bearing cap 10 and the flange portions 3 and 4 by covering the bearing cap 10 with bolts 11. . In this way, the spring portion 20
a, 20b straddle the bearing cap 10, the sliding portion 21 is pressed against the flange portions 3 and 4 by the elastic force of the spring portions 20a and 20b, and the sliding surface 22 is completely against the flange surfaces 3a and 4a. It comes into surface contact. Then, the cam shaft 1 is naturally positioned in the thrust direction by the pressing force received by the flange portions 3 and 4 so that the intermediate position of the flange portions 3 and 4 and the width center position of the bearing member 2 coincide with each other.

【0021】さらに、ばね部20a,20bは、カムギ
ヤ7の駆動時にカム軸1が発生するスラスト力以上の弾
発力を発生し、これによってカム軸1はスラスト方向へ
の移動ができなくなる。これによって、フランジ部3,
4と軸受部材2との衝突は完全に防止され、これに起因
する振動や騒音を完全に防止することができる。
Further, the spring portions 20a and 20b generate an elastic force more than the thrust force generated by the cam shaft 1 when the cam gear 7 is driven, which prevents the cam shaft 1 from moving in the thrust direction. Thereby, the flange portion 3,
The collision between the bearing 4 and the bearing member 2 is completely prevented, and the vibration and noise resulting from this can be completely prevented.

【0022】また、カム軸1の回転に伴い、回転するフ
ランジ面3a,4aに対し摺動面22が静止状態で摺動
するようになるが、このときにおいても摺動面22がフ
ランジ面3a,4aに常時面接触し、且つ比較的大きい
接触面積を有するため、これにより面圧を下げられ、摺
動部分の摩耗を防止でき、耐久性を大巾に向上すること
ができる。
Further, as the camshaft 1 rotates, the sliding surface 22 comes to slide in a stationary state against the rotating flange surfaces 3a and 4a. Even at this time, the sliding surface 22 also slides on the flange surface 3a. , 4a are always in surface contact with each other and have a relatively large contact area, so that the surface pressure can be reduced, wear of sliding parts can be prevented, and durability can be greatly improved.

【0023】さらに、軸受部材2の両側に隙間16を設
け、共通の固定部18a,18bに摺動部21及びばね
部20a,20bを一対ずつ設けて両隙間16に挿入す
るようにしたため、組立てが非常に容易であると共に、
いずれの方向のスラスト力も吸収できるようになり、衝
突防止を促進し、位置の安定度を増すことができる。
Further, the gaps 16 are provided on both sides of the bearing member 2, and the sliding portions 21 and the spring portions 20a, 20b are provided in pairs on the common fixed portions 18a, 18b so that they can be inserted into both the gaps 16. Is very easy and
The thrust force in either direction can be absorbed, collision prevention can be promoted, and position stability can be increased.

【0024】また、環状のフランジ面3a,4aに沿っ
て摺動面22を半環状に形成したため、接触面積を大き
くとれ、摩耗の抑制に効果的である。
Further, since the sliding surface 22 is formed in a semi-annular shape along the annular flange surfaces 3a, 4a, a large contact area can be obtained, and it is effective in suppressing wear.

【0025】加えて、特に一方の傾斜部23aが、摺動
面22及びフランジ面3a,4a間に潤滑油を迎え入れ
るため、摩耗の一層の防止を図ることができる。
In addition, in particular, since the one inclined portion 23a receives the lubricating oil between the sliding surface 22 and the flange surfaces 3a and 4a, further wear can be prevented.

【0026】即ち、図2を参照して、カム軸1の回転方
向は矢示する通りであり、摺動部21においては図中右
側の傾斜部23aが回転方向後方側の端部、左側の傾斜
部23bが回転方向前方側の端部となる。図4に示すよ
うに、フランジ面4a(及び3a)には動弁系潤滑のた
めの潤滑油が付着しており、これが傾斜部23aによっ
て塞き止められ或いは迎え入れられ、フランジ面3a,
4aの移動とともに摺動面間にひきずり込まれる。これ
によって摺動面間の潤滑が達成され、摩耗防止を図るこ
とができる。
That is, referring to FIG. 2, the rotation direction of the cam shaft 1 is as shown by the arrow, and in the sliding portion 21, the inclined portion 23a on the right side in the drawing is the end portion on the rear side in the rotation direction and the left side portion. The inclined portion 23b is an end portion on the front side in the rotation direction. As shown in FIG. 4, the lubricating oil for valve train lubrication adheres to the flange surface 4a (and 3a), which is blocked or welcomed by the inclined portion 23a, so that the flange surface 3a,
4a is moved and dragged between the sliding surfaces. As a result, lubrication between the sliding surfaces is achieved and wear can be prevented.

【0027】ここで、一方の傾斜部23aにおいては、
フランジ面3a,4aが対向方向から向かってくるた
め、潤滑油を迎え入れるような迎え角を有することにな
るが、他方の傾斜部23bにおいては、フランジ面3
a,4aが離れるように移動するため、そのような潤滑
油を迎え入れる効果がない。よって、少なくとも回転方
向後方側の傾斜部23aがあればよいが、他方の傾斜部
23bは回転方向が逆の場合に後方側となるので、これ
を設けておくと回転方向が逆のカム軸に適用することが
でき、便利である。また、これら傾斜部23a,23b
は同時に成形できるので製作が容易である。
Here, in the one inclined portion 23a,
Since the flange surfaces 3a, 4a come from the opposite direction, the angle of attack is such that the lubricating oil is received, but at the other inclined portion 23b, the flange surface 3 is formed.
Since a and 4a move away from each other, there is no effect of receiving such lubricating oil. Therefore, at least the inclined portion 23a on the rear side in the rotation direction is required, but the other inclined portion 23b is on the rear side when the rotation direction is opposite. Therefore, if this is provided, the cam shaft with the opposite rotation direction can be provided. It can be applied and is convenient. Also, these inclined portions 23a, 23b
Since they can be molded at the same time, they are easy to manufacture.

【0028】そして同様に、凹部24も、フランジ面3
a,4aに付着する潤滑油を貯留し、且つフランジ面3
a,4aの移動によって摺動面間にひきずり込ませる。
よってさらなる潤滑が可能となって、摩耗防止を促進す
ることができる。なお、凹部24は摺動部21の端縁部
のどこに設けてもよく、どの位置においても、フランジ
面3a,4aの潤滑油を貯留してひきずり込ませること
ができる。ただし、本形態の如く凹部24を上端位置に
設けると、回転方向からの潤滑油に加え、上方から流下
してきた潤滑油をも貯留し、且つそれを重力によっても
ひきずり込ませることができ、有利である。
Similarly, the recess 24 also has a flange surface 3
a, 4a are stored in the lubricating oil, and the flange surface 3
It is dragged between the sliding surfaces by the movement of a and 4a.
Therefore, further lubrication is possible and wear prevention can be promoted. The recess 24 may be provided anywhere on the edge of the sliding portion 21, and the lubricating oil of the flange surfaces 3a and 4a can be stored and dragged into the sliding surface at any position. However, when the recess 24 is provided at the upper end position as in the present embodiment, in addition to the lubricating oil from the rotation direction, the lubricating oil flowing down from above can be stored and dragged by gravity, which is advantageous. Is.

【0029】他、かかるスラスト軸受部材17は一体成
形品であるため、低コストで量産可能で高い信頼性を発
揮できるメリットもある。
In addition, since the thrust bearing member 17 is an integrally molded product, it has an advantage that it can be mass-produced at low cost and exhibits high reliability.

【0030】次に、本発明に係る他の形態としては次の
ようなものも考えられる。
Next, the following can be considered as another embodiment of the present invention.

【0031】例えば、隙間を片側のみとし、そこに片側
相当のばね部と摺動部のみを有するスラスト軸受部材を
設けるようにしてもよい。また、スラスト軸受部材にあ
って、固定部をボルト止めせず溝等に係合させる方法で
固定してもよいし、二分割でなく一つのものとしてもよ
い。さらに、ばね部をカム軸のスラスト力で変形し得る
ようにし、カム軸に衝突を生じさせない範囲で若干のス
ラスト方向の移動を許容するようにしてもよい。このと
きにおいては、スラスト力によってばね部が弾性変形
し、摺動部をフランジ部と常に平行になるよう移動さ
せ、互いの面接触を常時維持することとなる。そしてま
た、摺動部乃至摺動面は半環状に限らず、面接触に十分
な面積を有していれば他の形状、例えば完全な環状とす
ることも可能である。さらに摺動面の一部を凹状に窪ま
せ、これに作動油を貯留させるようにしてもよい。
For example, the gap may be provided only on one side, and a thrust bearing member having only one side corresponding to the spring portion and the sliding portion may be provided therein. Further, in the thrust bearing member, the fixing portion may be fixed by a method of engaging with a groove or the like without being bolted, or may be one instead of being divided into two. Further, the spring portion may be deformed by the thrust force of the cam shaft, and a slight movement in the thrust direction may be permitted within a range in which the cam shaft does not collide. At this time, the spring portion elastically deforms due to the thrust force, and the sliding portion is moved so as to be always parallel to the flange portion, so that mutual surface contact is always maintained. Further, the sliding portion or the sliding surface is not limited to the semi-annular shape, and may have another shape such as a perfect annular shape as long as it has an area sufficient for surface contact. Further, a part of the sliding surface may be recessed to store the hydraulic oil therein.

【0032】このように、他の形態は様々考えられ、本
発明は上記形態に限定されるものではない。
As described above, various other modes are conceivable, and the present invention is not limited to the above modes.

【0033】[0033]

【発明の効果】本発明は次の如き優れた効果を発揮す
る。
The present invention exhibits the following excellent effects.

【0034】(1) カム軸の衝突による振動や騒音を
防止でき、併せて摺動部分の摩耗を防止でき、耐久性を
大巾に向上することができる。
(1) Vibration and noise due to the collision of the camshaft can be prevented, and at the same time, abrasion of the sliding portion can be prevented, and the durability can be greatly improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るカム軸のスラスト軸受構造を示す
縦断面図である。
FIG. 1 is a vertical sectional view showing a thrust bearing structure of a camshaft according to the present invention.

【図2】図1のA−A線断面図である。FIG. 2 is a sectional view taken along line AA of FIG.

【図3】スラスト軸受部材を示し、(a)は平面図、
(b)は正面図、(c)は側面図である。
FIG. 3 shows a thrust bearing member, (a) is a plan view,
(B) is a front view, (c) is a side view.

【図4】傾斜部における潤滑油導入の様子を示す図であ
る。
FIG. 4 is a diagram showing how lubricating oil is introduced into the inclined portion.

【図5】従来のカム軸のスラスト軸受構造を示す縦断面
図である。
FIG. 5 is a vertical sectional view showing a conventional thrust bearing structure for a camshaft.

【図6】従来の皿ばねが線当たりする様子を示す拡大断
面図である。
FIG. 6 is an enlarged cross-sectional view showing how a conventional disc spring hits a wire.

【符号の説明】[Explanation of symbols]

1 カム軸 2 軸受部材 3,4 フランジ部 3a,4a フランジ面 16 隙間 17 スラスト軸受部材 18a,18b 固定部 20a,20b ばね部 21 摺動部 22 摺動面 23a,23b 傾斜部 24 凹部 1 Camshaft 2 Bearing member 3,4 Flange part 3a, 4a Flange surface 16 Gap 17 Thrust bearing member 18a, 18b Fixed part 20a, 20b Spring part 21 Sliding part 22 Sliding surface 23a, 23b Inclined part 24 Recessed part

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 軸受部材に支持されたカム軸に、上記軸
受部材を間に位置させて一対のフランジ部を設け、その
うち少なくとも一方のフランジ部と上記軸受部材との間
に、カム軸長手方向に沿う所定間隔の隙間を設けると共
に、該隙間に、上記軸受部材に固定される固定部と、上
記フランジ部のフランジ面に沿う摺動面を有した摺動部
と、上記固定部及び摺動部を連結して上記摺動面を上記
フランジ面に押圧し面接触させるばね部とを有するスラ
スト軸受部材を設けたことを特徴とするカム軸のスラス
ト軸受構造。
1. A cam shaft supported by a bearing member is provided with a pair of flange portions with the bearing member positioned therebetween, and a cam shaft longitudinal direction is provided between at least one of the flange portions and the bearing member. And a fixed portion fixed to the bearing member, a sliding portion having a sliding surface along the flange surface of the flange portion, the fixed portion and the slide. A thrust bearing member for a camshaft, comprising: a thrust bearing member having a spring portion that connects the portions and presses the sliding surface against the flange surface to bring it into surface contact.
【請求項2】 上記隙間が、それぞれの上記フランジ部
と上記軸受部材との間に設けられ、上記スラスト軸受部
材が、共通の上記固定部と、それぞれの上記隙間に対応
した一対ずつの上記摺動部及びばね部とを有する請求項
1記載のカム軸のスラスト軸受構造。
2. The gap is provided between each of the flange portions and the bearing member, and the thrust bearing member has a common fixed portion and a pair of the slides corresponding to the respective gaps. The thrust bearing structure for a camshaft according to claim 1, further comprising a moving portion and a spring portion.
【請求項3】 上記フランジ面が環状に形成され、上記
摺動面が半環状に形成された請求項1又は2記載のカム
軸のスラスト軸受構造。
3. The thrust bearing structure for a camshaft according to claim 1, wherein the flange surface is formed in an annular shape and the sliding surface is formed in a semi-annular shape.
【請求項4】 上記摺動部が、そのカム軸回転方向後方
側の端部に、上記フランジ面及び上記摺動面間に潤滑油
を迎え入れるための傾斜部を有する請求項1乃至3いず
れかに記載のカム軸のスラスト軸受構造。
4. The slidable portion has an inclined portion at the rear end in the camshaft rotation direction for accepting lubricating oil between the flange surface and the sliding surface. The camshaft thrust bearing structure described in.
【請求項5】 上記摺動部が、潤滑油を貯留するための
凹部を有する請求項1乃至4いずれかに記載のカム軸の
スラスト軸受構造。
5. The thrust bearing structure for a camshaft according to claim 1, wherein the sliding portion has a recess for storing lubricating oil.
JP4924496A 1996-03-06 1996-03-06 Thrust bearing structure for cam shaft Pending JPH09242511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4924496A JPH09242511A (en) 1996-03-06 1996-03-06 Thrust bearing structure for cam shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4924496A JPH09242511A (en) 1996-03-06 1996-03-06 Thrust bearing structure for cam shaft

Publications (1)

Publication Number Publication Date
JPH09242511A true JPH09242511A (en) 1997-09-16

Family

ID=12825455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4924496A Pending JPH09242511A (en) 1996-03-06 1996-03-06 Thrust bearing structure for cam shaft

Country Status (1)

Country Link
JP (1) JPH09242511A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1865156A1 (en) * 2006-06-07 2007-12-12 Ford Global Technologies, LLC A camshaft system for an internal combustion engine
JP2009236162A (en) * 2008-03-26 2009-10-15 Jtekt Corp Bearing device for camshaft
WO2011136394A1 (en) 2010-04-30 2011-11-03 Dow Corning Toray Co., Ltd. Powder treatment agent comprising sugar alcohol -modified organopolysiloxane
KR101154393B1 (en) * 2006-09-08 2012-06-15 현대자동차주식회사 Dynamic camshaft mounting device with variable valve lift system
US8539860B2 (en) 2007-11-27 2013-09-24 Jtekt Corporation Shaft apparatus with bearing
JP2015031231A (en) * 2013-08-06 2015-02-16 株式会社クボタ Bearing device of rotating shaft of engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1865156A1 (en) * 2006-06-07 2007-12-12 Ford Global Technologies, LLC A camshaft system for an internal combustion engine
US8511269B2 (en) 2006-06-07 2013-08-20 Ford Global Technologies Camshaft system for internal combustion engine
KR101154393B1 (en) * 2006-09-08 2012-06-15 현대자동차주식회사 Dynamic camshaft mounting device with variable valve lift system
US8539860B2 (en) 2007-11-27 2013-09-24 Jtekt Corporation Shaft apparatus with bearing
JP2009236162A (en) * 2008-03-26 2009-10-15 Jtekt Corp Bearing device for camshaft
WO2011136394A1 (en) 2010-04-30 2011-11-03 Dow Corning Toray Co., Ltd. Powder treatment agent comprising sugar alcohol -modified organopolysiloxane
JP2015031231A (en) * 2013-08-06 2015-02-16 株式会社クボタ Bearing device of rotating shaft of engine

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