JPH07208123A - Lubricating structure for cam follower - Google Patents
Lubricating structure for cam followerInfo
- Publication number
- JPH07208123A JPH07208123A JP6023692A JP2369294A JPH07208123A JP H07208123 A JPH07208123 A JP H07208123A JP 6023692 A JP6023692 A JP 6023692A JP 2369294 A JP2369294 A JP 2369294A JP H07208123 A JPH07208123 A JP H07208123A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- oil
- pin
- cam
- cam follower
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2810/00—Arrangements solving specific problems in relation with valve gears
- F01L2810/02—Lubrication
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、カムフォロワの潤滑構
造に係わり、特にディーゼルエンジン等内燃機関に好適
なカムフォロワの潤滑構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cam follower lubricating structure, and more particularly to a cam follower lubricating structure suitable for an internal combustion engine such as a diesel engine.
【０００２】[0002]
【従来の技術】カムフォロワは、カムの回転運動を上下
運動に変換するとともに、プッシュロッド等を介してエ
ンジンのバルブ開閉等を行っている。このカムフォロワ
内部、カムフォロワとカムとの接触部などの潤滑等のた
めに、従来、次のようなカムフォロワの潤滑構造が知ら
れている。図５に従来のカムフォロワの潤滑構造の要部
断面の平面図、図６に図５のＺ−Ｚ断面図であるカムフ
ォロワの潤滑構造の側面断面図を示す。カムフォロワ５
０は、ローラ５１、ピン５２およびフォロワレバー５３
から構成さる。2. Description of the Related Art A cam follower converts rotational movement of a cam into vertical movement, and also opens and closes a valve of an engine through a push rod or the like. In order to lubricate the inside of the cam follower, the contact portion between the cam follower and the cam, etc., the following lubrication structure of the cam follower has been conventionally known. FIG. 5 is a plan view of a cross section of a main part of a conventional cam follower lubricating structure, and FIG. 6 is a side cross-sectional view of the cam follower lubricating structure which is a ZZ sectional view of FIG. Cam follower 5
0 is a roller 51, a pin 52 and a follower lever 53
It consists of
【０００３】フォロワレバー５３は、プッシュロッド２
の球状端面と摺動可能な球面部を形成する耐摩耗部材５
３ａが固着され、他端側は、回動可能にシャフト５４に
取り付けられている。シャフト５４は、図示しないエン
ジンのシリンダブロック内壁に取り付けられ、内部には
供給油道５５が穿設される。フォロワレバー５３に穿設
される油穴５７は、供給油道５５と接続する油穴５６と
連通するとともに、ピン５２の外周部に形成される油溝
５８に開口している。また、フォロワレバー５３に固設
されるピン５２を軸として回動可能なローラ５１の内周
面と、ピン５２の外周面とは所定隙間のクリアランス部
６１を有し、さらに、ローラ５１の側面とフォロワレバ
ー５３との間にも所定隙間のクリアランス部６２が形成
され、共に油潤滑が可能な隙間となっている。The follower lever 53 is a push rod 2.
Abrasion resistant member 5 that forms a spherical portion that can slide with the spherical end surface of
3a is fixed and the other end is rotatably attached to the shaft 54. The shaft 54 is attached to the inner wall of a cylinder block of an engine (not shown), and a supply oil passage 55 is bored therein. The oil hole 57 formed in the follower lever 53 communicates with the oil hole 56 connected to the supply oil passage 55 and opens in the oil groove 58 formed in the outer peripheral portion of the pin 52. Further, the inner peripheral surface of the roller 51, which is rotatable around the pin 52 fixed to the follower lever 53, and the outer peripheral surface of the pin 52 have a clearance portion 61 with a predetermined gap, and further, the side surface of the roller 51. A clearance portion 62 having a predetermined gap is also formed between the follower lever 53 and the follower lever 53, both of which are oil-lubricating gaps.
【０００４】かかる構成により、作動時において、カム
１の矢印６５方向への回転に伴い、カム１と接触するロ
ーラ５１は矢印６６方向へ回転する。一方、油はシャフ
ト５４の供給油道５５から、油穴５６、５７を経てピン
５２外周部の油溝５８に給油される。この油は、ローラ
５１の回転に巻き込まれるようにしてクリアランス部６
１を矢印６７方向に給油され、ローラ５１の内周面とピ
ン５２の外周面との潤滑を行っている。また、クリアラ
ンス部６２を流れる油は、矢印６８方向に流れつつ、油
滴流６９のように落下し、カム１とローラ５１の外周面
との潤滑を行っている。With this structure, when the cam 1 rotates in the direction of arrow 65 during operation, the roller 51 in contact with the cam 1 rotates in the direction of arrow 66. On the other hand, oil is supplied from the oil supply passage 55 of the shaft 54 through the oil holes 56 and 57 to the oil groove 58 on the outer peripheral portion of the pin 52. This oil is caught in the rotation of the roller 51 so that the clearance 6
1 is lubricated in the direction of arrow 67 to lubricate the inner peripheral surface of the roller 51 and the outer peripheral surface of the pin 52. Further, the oil flowing through the clearance 62 drops in the direction of arrow 68 and drops like an oil drop stream 69 to lubricate the cam 1 and the outer peripheral surface of the roller 51.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来技術には次のような問題点がある。すなわち、図５お
よび図６において、ローラ５１の内周面とピン５２の外
周面との間での潤滑については、ピン５２外周部の油溝
５８からクリアランス部６１を矢印６７方向に流れ、負
荷が最大となり易い高負荷部Ｐ1 まで到達する距離が長
く、特に、エンジンの急加速時等には、高負荷部Ｐ1 へ
の給油が遅れて潤滑不足となり、焼き付き等の問題を生
じやすい。また、カム１とローラ５１の外周面との間で
の潤滑については、負荷が最大となる高負荷部Ｐ2 に対
し、高負荷部Ｐ2 通過後のカム１、ローラ５１に給油す
るので、高負荷部Ｐ2 への油の巻き込みが少なく、潤滑
不足が生じやすい。However, the above-mentioned prior art has the following problems. That is, in FIGS. 5 and 6, regarding the lubrication between the inner peripheral surface of the roller 51 and the outer peripheral surface of the pin 52, the oil flows from the oil groove 58 of the outer peripheral portion of the pin 52 through the clearance 61 in the direction of the arrow 67 to load Is long enough to reach the high load portion P 1 , and particularly when the engine is rapidly accelerated, lubrication to the high load portion P 1 is delayed, resulting in insufficient lubrication, and problems such as seizure are likely to occur. Regarding the lubrication between the cam 1 and the outer peripheral surface of the roller 51, since the high load portion P 2 where the load is maximum is lubricated to the cam 1 and the roller 51 after passing through the high load portion P 2 , There is little oil entrapment in the high load portion P 2, and insufficient lubrication easily occurs.
【０００６】本発明は、上記従来技術の問題点に着目
し、ローラの内周面とピンの外周面との間の高負荷部、
カムとローラの外周面との間の高負荷部への給油を効率
よく行うことにより、良好な潤滑状態を確保するととも
に、接触面等の耐久性向上が可能なカムフォロワの潤滑
構造を提供することを目的とする。In the present invention, focusing on the problems of the above-mentioned prior art, the high load portion between the inner peripheral surface of the roller and the outer peripheral surface of the pin,
To provide a lubricating structure for a cam follower capable of ensuring a good lubrication state and efficiently improving the durability of a contact surface by efficiently supplying oil to a high load portion between the cam and the outer peripheral surface of the roller. With the goal.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明に係わるカムフォロワの潤滑構造において、
第１発明は、カムと接触し回動可能なローラと、前記ロ
ーラを支持するピンと、一端側に前記ピンを備え、他端
側が回動可能にシャフトに取り付けられるフォロワレバ
ーとから構成されるカムフォロワであって、前記シャフ
ト内部に供給油道を形成するとともに、ローラの内周と
ピンの外周との回動部、並びに、ローラの側面とフォロ
ワレバーとの間に、給油可能な隙間を形成するカムフォ
ロワの潤滑構造において、前記ピンを貫通する油穴を形
成し、前記油穴の一端が前記フォロワレバーを経由して
前記供給油道に連通し、かつ、前記油穴の他端が前記ロ
ーラとの回動部に開口することを特徴とする。In order to achieve the above object, in a cam follower lubricating structure according to the present invention,
A first aspect of the present invention is a cam follower including a roller that is in contact with a cam and is rotatable, a pin that supports the roller, and a follower lever that has the pin on one end side and is rotatably attached to a shaft on the other end side. The oil supply passage is formed inside the shaft, and an oil refillable gap is formed between the inner periphery of the roller and the outer periphery of the pin, and between the side surface of the roller and the follower lever. In a lubrication structure for a cam follower, an oil hole penetrating the pin is formed, one end of the oil hole communicates with the supply oil passage via the follower lever, and the other end of the oil hole is connected to the roller. It is characterized in that it is opened in the rotating part of the.
【０００８】第２発明は、第１発明において、前記油穴
の前記他端は、前記ピンの外周に形成される油溝に開口
する。第３発明は、第２発明において、前記油溝の位置
は、前記カムと前記ローラとの接触部に対して、前記ロ
ーラの回動方向における手前で、かつ近い位置である。
本発明に係わるカムフォロワの潤滑構造は、以上の構成
とした。In a second aspect based on the first aspect, the other end of the oil hole opens into an oil groove formed on the outer periphery of the pin. In a third aspect based on the second aspect, the position of the oil groove is a position near and in front of the contact portion between the cam and the roller in the rotation direction of the roller.
The lubricating structure of the cam follower according to the present invention has the above-mentioned configuration.
【０００９】[0009]
【作用】上記構成による本発明の作用を説明する。本発
明は、シャフト内部に形成される供給油道から給油され
る油が、シャフト内部の油穴、フォロワレバー内部の油
穴を経由して、ピンを貫通する油穴からローラとの回動
部のローラ回転方向における手前に充分に給油されるの
で、ピン外周とローラ内周との接触面の高負荷部、カム
外周とローラ内周との接触面の高負荷部への距離が短く
なり、焼き付き等の問題を生じやすい高負荷部でも良好
な潤滑が得られる。また、ピンを貫通する油穴の先端部
のピンの外周に油溝を形成するので、ピン外周とローラ
内周との接触面全域でさらに潤滑性が向上する。さらに
は、この油溝の位置を、カム外周とローラ外周との高負
荷部に対し、ローラ回転方向における手前でかつ近い位
置とするので、この高負荷部への油の巻き込みが多くな
り、高負荷部での潤滑がより良好となる。The operation of the present invention having the above construction will be described. According to the present invention, the oil supplied from the oil supply passage formed inside the shaft passes through the oil hole inside the shaft and the oil hole inside the follower lever, and from the oil hole penetrating the pin, the rotation part with the roller. Since oil is sufficiently supplied to the front in the roller rotation direction of, the distance to the high load portion of the contact surface between the pin outer circumference and the roller inner circumference and the high load portion of the contact surface between the cam outer circumference and the roller inner circumference is shortened, Good lubrication can be obtained even in a high load portion where problems such as seizure are likely to occur. Further, since the oil groove is formed on the outer circumference of the pin at the tip of the oil hole penetrating the pin, the lubricity is further improved over the entire contact surface between the outer circumference of the pin and the inner circumference of the roller. Furthermore, since the position of this oil groove is located in front of and close to the high load portion of the cam outer periphery and the roller outer periphery in the roller rotation direction, the amount of oil entrained in this high load portion increases, Lubrication in the load section becomes better.
【００１０】[0010]
【実施例】以下に、本発明に係るカムフォロワの潤滑構
造の実施例につき、図面を参照しつつ詳述する。図１
に、カムフォロワの潤滑構造の適用例であるディーゼル
エンジンのユニットインジェクタ駆動装置の要部断面図
を示す。ユニットインジェクタ駆動装置は、エンジン回
転と同期して回転するカム１、シリンダブロック７の内
壁に摺動部材を介して回動可能に取り付けられると共
に、カム１の回転運動を上下運動に変換するカムフォロ
ワ１０、カムフォロワ１０の上下運動をロッカアーム３
に伝達するプッシュロッド２、プッシュロッド２の上方
向の力により端部３ａを押し上げられることにより端部
３ｂが下方向に揺動するロッカアーム３、ロッカアーム
３の揺動による押し付け力により、スプリングホルダ４
を下方向に押し付け、スプリング５を縮めてスプリング
ホルダ４の下方位置にある燃料噴射プランジャ（図示せ
ず）で高圧の燃料を噴射するユニットインジェクタ６か
ら構成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a cam follower lubricating structure according to the present invention will be described below in detail with reference to the drawings. Figure 1
FIG. 1 is a sectional view of a main part of a unit injector drive device for a diesel engine, which is an application example of a cam follower lubrication structure. The unit injector drive device is rotatably attached to an inner wall of a cam 1 and a cylinder block 7 that rotate in synchronization with engine rotation via a sliding member, and a cam follower 10 that converts rotational movement of the cam 1 into vertical movement. , Up and down movement of cam follower 10 rocker arm 3
The push rod 2 transmitted to the push rod 2, the end portion 3a is pushed up by the upward force of the push rod 2, and the end portion 3b swings downward.
Is pressed downward, the spring 5 is contracted, and a high-pressure fuel is injected by a fuel injection plunger (not shown) located below the spring holder 4 to form a unit injector 6.
【００１１】次に、図２に示す本実施例に係るカムフォ
ロワ１０の潤滑構造の要部断面の平面図、図３に示す図
２のＸ−Ｘ断面図であるカムフォロワ１０の潤滑構造の
側面断面図で、さらに詳述する。カムフォロワ１０は、
外周がカム１と接しつつ回動可能なローラ１１、ローラ
１１と回動可能でかつローラ１１の支軸であるピン１
２、ピン１２を支持するフォロワレバー１３から構成さ
る。Next, FIG. 2 is a plan view of a cross section of a main part of the lubricating structure of the cam follower 10 according to the present embodiment, and FIG. 3 is a sectional view taken along the line XX of FIG. Further details will be given with reference to the drawings. The cam follower 10
A roller 11 that is rotatable while its outer periphery is in contact with the cam 1, and a pin 1 that is rotatable with the roller 11 and is a support shaft of the roller 11.
2, a follower lever 13 that supports the pin 12.
【００１２】フォロワレバー１３は、一端側の上部には
プッシュロッド２の球状端面と摺動可能な球面部を形成
する耐摩耗部材１３ａが固着され、フォロワレバー１３
の他端側は、回動可能にシャフト１４に取り付けられて
いる。シャフト１４は、エンジンのシリンダブロック７
（図１参照）の内壁に取り付けられ、内部には供給油道
１５が穿設されている。この供給油道１５は、シャフト
１４に穿設される油穴１６と連通し、更にはフォロワレ
バー１３に穿設される油穴１７とも連通している。ピン
１２を直径方向に貫通する油穴１８は、一端で油穴１７
と連通すると共に、他端はピン１２の外周に形成される
油溝１９に開口している。また、ピン１２を軸として回
動可能なローラ１１の内周面と、ピン１２の外周面とは
所定隙間のクリアランス部２１を有し、さらに、ローラ
１１の側面とフォロワレバー１３との間にも所定隙間の
クリアランス部２２が形成され、共に油潤滑が可能な隙
間となっている。The follower lever 13 has a wear-resistant member 13a fixed to the upper end on the one end side thereof and forming a spherical portion slidable with the spherical end surface of the push rod 2.
The other end of the shaft is rotatably attached to the shaft 14. The shaft 14 is the cylinder block 7 of the engine.
It is attached to the inner wall (see FIG. 1) and a supply oil passage 15 is bored inside. The oil supply passage 15 communicates with an oil hole 16 formed in the shaft 14, and also communicates with an oil hole 17 formed in the follower lever 13. The oil hole 18 penetrating the pin 12 in the diameter direction has an oil hole 17 at one end.
The other end is open to an oil groove 19 formed on the outer periphery of the pin 12. Further, the inner peripheral surface of the roller 11 rotatable about the pin 12 and the outer peripheral surface of the pin 12 have a clearance portion 21 with a predetermined clearance, and further, between the side surface of the roller 11 and the follower lever 13. Also, a clearance portion 22 having a predetermined clearance is formed, and both are clearances that allow oil lubrication.
【００１３】かかる構成による作動において、先ずカム
１の矢印２５方向への回転に伴い、カム１と接触するロ
ーラ１１は矢印２６方向へ回転する。一方、潤滑油等の
油はシャフト１４の供給油道１５から、油穴１６、１
７、１８を経てピン１２外周部の油溝１９に給油され
る。この油は、ローラ１１の回転に巻き込まれるように
してクリアランス部２１を矢印２７方向に給油される
が、油溝１９と、クリアランス部２１で負荷が最大とな
り易い高負荷部Ｐ1 との距離が短いので、高負荷部Ｐ1
への給油が迅速に行われ、良好な潤滑状態となり、特
に、従来技術では生じ易かったエンジンの急加速時など
での焼き付き等の問題を生じることは無い。これによ
り、ローラ１１の内周面とピン１２の外周面の接触面
（クリアランス部２１）は全域で良好な潤滑が得られる
ので、良い耐久性が得られる。In the operation of the above structure, first, as the cam 1 rotates in the direction of arrow 25, the roller 11 contacting the cam 1 rotates in the direction of arrow 26. On the other hand, oil such as lubricating oil is supplied from the oil supply passage 15 of the shaft 14 to the oil holes 16, 1
The oil is supplied to the oil groove 19 on the outer peripheral portion of the pin 12 via 7 and 18. This oil is supplied to the clearance portion 21 in the direction of the arrow 27 so as to be caught in the rotation of the roller 11, but the distance between the oil groove 19 and the high load portion P 1 where the load is likely to be maximized in the clearance portion 21 is reduced. Since it is short, the high load part P 1
The oil is quickly supplied to the vehicle, and a good lubrication state is achieved, and there is no problem such as seizure during rapid acceleration of the engine, which is particularly likely to occur in the prior art. As a result, since good lubrication can be obtained in the entire contact surface (clearance portion 21) between the inner peripheral surface of the roller 11 and the outer peripheral surface of the pin 12, good durability can be obtained.
【００１４】また、クリアランス部２２を流れる油は、
矢印２８方向に流れつつ、油滴流２９のように落下し、
カム１とローラ１１の外周面とを良好に潤滑する。この
油滴流２９の落下位置は、カム１とローラ１１の外周面
との間で負荷が最大となる高負荷部Ｐ2 に対し、回転方
向の矢印２５、２６の手前で、かつ近傍であり、高負荷
部Ｐ2 への効率のよい給油が可能になり、カム１とロー
ラ１１の外周との接触面の耐久性が向上する。The oil flowing through the clearance 22 is
While flowing in the direction of the arrow 28, it drops like an oil drop stream 29,
The cam 1 and the outer peripheral surface of the roller 11 are satisfactorily lubricated. The drop position of the oil drop flow 29 is before and in the vicinity of the arrows 25 and 26 in the rotation direction with respect to the high load portion P 2 where the load is maximum between the cam 1 and the outer peripheral surface of the roller 11. Therefore, it is possible to efficiently supply oil to the high load portion P 2 , and the durability of the contact surface between the cam 1 and the outer periphery of the roller 11 is improved.
【００１５】次に、本発明に係る別の実施例であるカム
フォロワ３０の潤滑構造の要部断面の平面図を図４に示
す。カムフォロワ３０の基本構成はカムフォロワ１０と
同じであり、ピンの構造が異なる。なお、図２及び図３
と同一部品・同一機能部には同一符号を付して説明は省
略する。カムフォロワ３０は、ローラ１１、ローラ１１
と回動可能でかつローラ１１の支軸であるピン３２、ピ
ン３２を支持するフォロワレバー１３から構成さる。ピ
ン３２内部を斜めに横断し貫通する油穴３８は、一端で
油穴１７と連通すると共に、他端はローラ１１との回動
部に開口し、開口位置は回動部軸方向のほぼ中央であ
る。Next, FIG. 4 is a plan view of a cross section of a main part of a lubricating structure for a cam follower 30 according to another embodiment of the present invention. The basic structure of the cam follower 30 is the same as that of the cam follower 10, but the pin structure is different. 2 and 3
The same parts and the same functional parts as those in FIG. The cam follower 30 includes a roller 11 and a roller 11.
And a follower lever 13 that supports the pin 32. The pin 32 is rotatable and supports the roller 11. An oil hole 38 diagonally traversing the inside of the pin 32 communicates with the oil hole 17 at one end, and the other end is opened at a rotating portion with the roller 11, and the opening position is substantially the center in the rotating portion axial direction. Is.
【００１６】かかる構成により、油はシャフト１４の供
給油道１５から、油穴１６、１７、３８を経て、ピン３
２の外周面とローラ１１の外周面とのクリアランス部２
１に給油される。この油は、上述の実施例と同様に、ロ
ーラ１１の回転に巻き込まれるようにしてクリアランス
部２１を矢印２７（図３参照）方向に流れ、油穴３８か
ら短距離に位置する高負荷部Ｐ1 に迅速に給油し、良好
な潤滑を行う。また、油穴３８から給油される油は矢印
３９方向にも流れ、クリアランス部２２を矢印２８方向
に流れて油滴流２９（図３参照）となり、カム１とロー
ラ１１の外周面との間の高負荷部Ｐ2 の手前近傍に落下
し、高負荷部Ｐ2 への効率のよい給油を行う。以上によ
り、上述の実施例と同様に、良好な潤滑を可能とし、接
触面の耐久性を向上している。With this structure, oil is supplied from the oil supply passage 15 of the shaft 14 through the oil holes 16, 17, and 38 to the pin 3
2 between the outer peripheral surface of the roller 2 and the outer peripheral surface of the roller 11
Refueled to 1. This oil flows through the clearance portion 21 in the direction of the arrow 27 (see FIG. 3) so as to be caught in the rotation of the roller 11 as in the above-described embodiment, and the high load portion P located at a short distance from the oil hole 38. 1. Quickly refuel and provide good lubrication. Further, the oil supplied from the oil hole 38 also flows in the direction of arrow 39 and flows in the clearance portion 22 in the direction of arrow 28 to form an oil drop flow 29 (see FIG. 3), which is between the cam 1 and the outer peripheral surface of the roller 11. high load portion falls to short of the vicinity of the P 2 of performing efficient oil supply to the high-load portion P 2. As described above, similar to the above-described embodiment, good lubrication is possible and the durability of the contact surface is improved.
【００１７】以上、本発明に係るカムフォロワの潤滑構
造に関し詳述したが、実施例に限定されるものではな
い。油穴１８の油溝１９および油穴３８の開口部の位置
は、高負荷部Ｐ1 、Ｐ2 の良好な潤滑状態を得るために
設定されるものであり、例えば、図３において、ピン１
２内部を貫通する油穴１８は左下がりにして、開口部に
油溝１９を形成してもよい。また、油穴は２箇所以上に
並列して形成してもよい。さらに、油溝１９は軸方向以
外の方向に形成してよい。Although the lubrication structure of the cam follower according to the present invention has been described in detail above, it is not limited to the embodiments. The positions of the oil groove 19 of the oil hole 18 and the opening of the oil hole 38 are set in order to obtain a good lubrication state of the high load parts P 1 and P 2. For example, in FIG.
The oil hole 18 penetrating the inside of the container 2 may be left-downward, and an oil groove 19 may be formed in the opening. Further, the oil holes may be formed in parallel at two or more places. Furthermore, the oil groove 19 may be formed in a direction other than the axial direction.
【００１８】[0018]
【発明の効果】本発明は、以上説明したように構成され
ているので、以下に記載されるような効果を奏する。充
分な量の油が供給される油溝・ピンを貫通する油穴の位
置は、回転を考慮した距離がピン外周とローラ内周との
間の高負荷部に近いので、迅速な給油が可能となり、エ
ンジン急加速時でも良好な潤滑状態が得られ、接触面の
耐久性が向上する。また、カム外周とローラ外周との接
触部となる高負荷部へ、効率のよい給油が可能であるの
で、良好な潤滑が得られ、接触面の耐久性が向上する。
したがって、効率のよい潤滑状態を可能とし、優れた耐
久性を有するカムフォロワおよびカムが得られる。Since the present invention is constructed as described above, it has the following effects. The oil groove that supplies a sufficient amount of oil and the position of the oil hole that penetrates the pin have a distance considering rotation that is close to the high load part between the pin outer circumference and the roller inner circumference, so quick oil supply is possible. As a result, good lubrication can be obtained even during sudden engine acceleration, and the durability of the contact surface is improved. Further, since it is possible to efficiently supply oil to the high load portion which is the contact portion between the outer circumference of the cam and the outer circumference of the roller, good lubrication is obtained and the durability of the contact surface is improved.
Therefore, a cam follower and a cam that enable efficient lubrication and have excellent durability can be obtained.
【図１】本発明に係るカムフォロワの潤滑構造の適用例
であるディーゼルエンジンのユニットインジェクタ駆動
装置の要部断面図である。FIG. 1 is a cross-sectional view of a main part of a unit injector drive device for a diesel engine, which is an application example of a lubrication structure for a cam follower according to the present invention.
【図２】本発明に係る実施例のカムフォロワの潤滑構造
の要部断面の平面図である。FIG. 2 is a plan view of a cross section of a main part of a lubricating structure for a cam follower according to an embodiment of the present invention.
【図３】図２のＸ−Ｘ断面図である。FIG. 3 is a sectional view taken along line XX of FIG.
【図４】本発明に係る別の実施例のカムフォロワの潤滑
構造の要部断面の平面図である。FIG. 4 is a plan view of a cross section of a main part of a lubricating structure for a cam follower according to another embodiment of the present invention.
【図５】従来技術に係るカムフォロワの潤滑構造の要部
断面の平面図である。FIG. 5 is a plan view of a cross section of a main part of a lubrication structure for a cam follower according to a conventional technique.
【図６】図５のＺ−Ｚ断面図である。6 is a sectional view taken along line ZZ in FIG.
１ カム、１０、３０ カムフォロワ、１１ ローラ、
１２、３２ ピン、１３ フォロワレバー、１４ シャ
フト、１５ 供給油道、１６、１７、１８、３８ 油
穴、１９ 油溝、２１、２２ クリアランス部、２９
油滴流、Ｐ1 、Ｐ2 高負荷部。1 cam, 10 and 30 cam followers, 11 rollers,
12, 32 pin, 13 follower lever, 14 shaft, 15 oil supply passage, 16, 17, 18, 38 oil hole, 19 oil groove, 21, 22 clearance part, 29
Oil drop flow, P 1 , P 2 high load part.
Claims (3)
ローラを支持するピンと、一端側に前記ピンを備え、他
端側が回動可能にシャフトに取り付けられるフォロワレ
バーとから構成されるカムフォロワであって、前記シャ
フト内部に供給油道を形成するとともに、ローラの内周
とピンの外周との回動部、並びに、ローラの側面とフォ
ロワレバーとの間に、給油可能な隙間を形成するカムフ
ォロワの潤滑構造において、前記ピンを貫通する油穴を
形成し、前記油穴の一端が前記フォロワレバーを経由し
て前記供給油道に連通し、かつ、前記油穴の他端が前記
ローラとの回動部に開口することを特徴とするカムフォ
ロワの潤滑構造。1. A cam follower composed of a roller that is in contact with a cam and is rotatable, a pin that supports the roller, and a follower lever that is provided with the pin at one end side and is rotatably attached to a shaft at the other end side. The oil supply passage is formed inside the shaft, and an oil refillable gap is formed between the inner periphery of the roller and the outer periphery of the pin, and between the side surface of the roller and the follower lever. In a cam follower lubricating structure, an oil hole penetrating the pin is formed, one end of the oil hole communicates with the supply oil passage via the follower lever, and the other end of the oil hole is connected to the roller. A lubrication structure for a cam follower, characterized in that it is opened in the rotating part of the.
に形成される油溝に開口する請求項１記載のカムフォロ
ワの潤滑構造。2. The lubricating structure for a cam follower according to claim 1, wherein the other end of the oil hole opens into an oil groove formed on the outer periphery of the pin.
ラとの接触部に対して、前記ローラの回動方向における
手前で、かつ近い位置である請求項２記載のカムフォロ
ワの潤滑構造。3. The lubricating structure for a cam follower according to claim 2, wherein the position of the oil groove is a position near and in front of a contact portion between the cam and the roller in a rotation direction of the roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6023692A JPH07208123A (en) | 1994-01-25 | 1994-01-25 | Lubricating structure for cam follower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6023692A JPH07208123A (en) | 1994-01-25 | 1994-01-25 | Lubricating structure for cam follower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07208123A true JPH07208123A (en) | 1995-08-08 |
Family
ID=12117483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6023692A Pending JPH07208123A (en) | 1994-01-25 | 1994-01-25 | Lubricating structure for cam follower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07208123A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2326694B (en) * | 1997-06-23 | 2000-05-10 | Daido Metal Co | Roller supporting device |
| KR20140134608A (en) * | 2013-05-14 | 2014-11-24 | 캐터필라 모토렌 게엠베하 운트 코. 카게 | Flexible cam technology |
-
1994
- 1994-01-25 JP JP6023692A patent/JPH07208123A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2326694B (en) * | 1997-06-23 | 2000-05-10 | Daido Metal Co | Roller supporting device |
| KR20140134608A (en) * | 2013-05-14 | 2014-11-24 | 캐터필라 모토렌 게엠베하 운트 코. 카게 | Flexible cam technology |
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