JPH0450405Y2 - - Google Patents
Info
- Publication number
- JPH0450405Y2 JPH0450405Y2 JP1986010684U JP1068486U JPH0450405Y2 JP H0450405 Y2 JPH0450405 Y2 JP H0450405Y2 JP 1986010684 U JP1986010684 U JP 1986010684U JP 1068486 U JP1068486 U JP 1068486U JP H0450405 Y2 JPH0450405 Y2 JP H0450405Y2
- Authority
- JP
- Japan
- Prior art keywords
- rocker arm
- mounting hole
- spherical surface
- contact
- arm body
- 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.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001234 light alloy Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は、エンジンのロツカーアームに関す
るものである。[Detailed description of the invention] Industrial application field This invention relates to a rocker arm for an engine.
従来の技術
従来、ロツカーアーム本体及びプツシユロツド
等を有するエンジンにおいては、ロツカーアーム
本体のプツシユロツド等との当接部は面圧が大き
く、また、潤滑も不十分となりやすい部分であ
り、この当接部における摩耗軽減のために種々の
手段が講じられている。例えば、鋼製のロツカー
アーム本体においては、切削加工後に当接部を熱
処理したり、別個に形成した耐摩性部材を当接部
にねじ込み又は圧入している。軽合金製又はプラ
スチツクス製のロツカーアーム本体においては、
当接部に耐摩性部材をねじ込み、接着、圧入等し
ている。Conventionally, in an engine having a rocker arm body, a push rod, etc., the contact portion of the rocker arm body with the push rod, etc. has a large surface pressure, and the lubrication is likely to be insufficient, resulting in wear and tear at this contact portion. Various measures have been taken for mitigation. For example, in a rocker arm body made of steel, the contact portion is heat treated after cutting, or a separately formed wear-resistant member is screwed or press-fitted into the contact portion. For rocker arm bodies made of light alloy or plastic,
A wear-resistant member is screwed, glued, or press-fitted into the contact area.
考案が解決しようとする問題点
鋼製のロツカーアーム本体において、当接部を
熱処理した場合には、処理コストが高く、また、
加熱部と非加熱部との結晶組織の相違が破損の原
因となつている。別個に形成した耐摩性部材を当
接部にねじ込み又は圧入等した場合には、耐摩性
部材の製造コストが高く、また、ねじ込み、圧入
等のためのロツカーアーム本体のねじ穴加工等に
は高精度が必要であり、加工コストが高いという
欠点がある。Problems to be solved by the invention If the abutment part of the steel Rotsuker arm body is heat treated, the processing cost is high, and
The difference in crystal structure between the heated part and the non-heated part is the cause of the damage. If a separately formed wear-resistant member is screwed or press-fitted into the abutment part, the manufacturing cost of the wear-resistant member is high, and the machining of screw holes in the rocker arm body for screwing or press-fitting requires high precision. The disadvantage is that processing costs are high.
軽合金製又はプラスチツクス製のロツカーアー
ム本体において、耐摩性部材を当接部にねじ込み
等した場合には、上述の鋼製ロツカーアーム本体
の場合と同様に、耐摩性部材の製造コストが高
く、ねじ穴加工等に高精度を必要とするため加工
コストが高いという欠点がある。 When a wear-resistant member is screwed into the abutting part of a rocker arm body made of light alloy or plastic, the manufacturing cost of the wear-resistant member is high, and the screw hole The disadvantage is that the processing cost is high because high precision is required for processing.
さらに、耐摩性部材が比較的重量物であり、こ
の耐摩性部材を取付けることによつてバルブスプ
リングのサージ限界周波数が下がり、高速運転が
困難になるという欠点がある。 Furthermore, the wear-resistant member is relatively heavy, and the provision of this wear-resistant member lowers the surge limit frequency of the valve spring, making high-speed operation difficult.
この考案は、このような点に鑑みなされたもの
で、製造コスト及び加工コストが安価で軽量であ
り、かつ、組立が容易なエンジンのロツカーアー
ムを得ることを目的とする。 This invention was made in view of the above points, and the object is to obtain a rocker arm for an engine that is low in manufacturing cost and processing cost, lightweight, and easy to assemble.
問題点を解決するための手段
ロツカーアーム本体の一端側に段差部を有する
円形の取付け穴を形成し、プツシユロツドの凸球
面部が当接する凹球面部と放射状に形成された複
数のスリツトとを有し外形寸法が前記取付け穴の
内径寸法より大きい板状部材による当接部材を形
成し、この当接部材を前記取付け穴に弾発的には
め込んだものである。Means to Solve the Problem A circular mounting hole with a stepped portion is formed on one end side of the rocker arm body, and has a concave spherical surface portion that the convex spherical surface portion of the push rod comes into contact with, and a plurality of radially formed slits. A contact member is formed of a plate-like member whose outer dimension is larger than the inner diameter of the mounting hole, and this contact member is elastically fitted into the mounting hole.
作 用
当接部材は板状であるため、その加工と熱処理
が容易であり、また、軽量であり、しかも、放射
状に形成された複数のスリツトが形成されている
とともに外形寸法が取付け穴の内径寸法よりも大
きいため、取付け穴にはめ込んで弾発的に保持さ
せることができ、高い寸法精度を必要とすること
なくその組立を容易に行うことができるものであ
る。Function Since the abutting member is plate-shaped, it is easy to process and heat-treat, and is also lightweight.Moreover, it has multiple radially formed slits, and its external dimensions are similar to the inner diameter of the mounting hole. Since it is larger than the size, it can be fitted into a mounting hole and held elastically, and it can be easily assembled without requiring high dimensional accuracy.
実施例
この考案の一実施例を図面に基づいて説明す
る。シリンダヘツド１の上方には支軸２が軸支さ
れており、この支軸２の軸心回りに往復回動自在
にロツカーアーム本体３が取付けられている。ロ
ツカーアーム本体３の一端には段差部４を有する
取付け部である取付け穴５が形成され、ロツカー
アーム本体３の他端にはねじ穴６が形成され、こ
のねじ穴６に調整ねじ７が螺合されている。前記
シリンダヘツド１には燃焼室８に臨むバルブ９が
往復摺動自在に保持されている。また、このバル
ブ９はバルブスプリング１０によつて上方向きに
付勢され、バルブ９の上端部が前記調整ねじ７の
下端部に弾発的に当接されている。Embodiment An embodiment of this invention will be described based on the drawings. A support shaft 2 is pivotally supported above the cylinder head 1, and a rocker arm main body 3 is attached to be able to reciprocate around the axis of the support shaft 2. A mounting hole 5 is formed at one end of the rocker arm body 3 and is a mounting portion having a stepped portion 4. A screw hole 6 is formed at the other end of the rocker arm body 3, and an adjustment screw 7 is screwed into the screw hole 6. ing. A valve 9 facing a combustion chamber 8 is held in the cylinder head 1 so as to be slidable back and forth. Further, the valve 9 is urged upward by a valve spring 10, and the upper end of the valve 9 is resiliently abutted against the lower end of the adjusting screw 7.
前記取付け穴５には板状部材をプレス加工して
成形した凹球面部１１を有する当接部材１２が弾
発的にはめ込まれている。この当接部材１２は、
硬化処理が施されており、その外径寸法は取付け
穴５の内径寸法より少し大きく設定されている。
また、第２図において示すように、放射状に複数
個のスリツト１３が形成されている。 An abutment member 12 having a concave spherical surface 11 formed by pressing a plate-like member is elastically fitted into the mounting hole 5. This contact member 12 is
It has been hardened, and its outer diameter is set slightly larger than the inner diameter of the mounting hole 5.
Further, as shown in FIG. 2, a plurality of slits 13 are formed radially.
カム１４の回転により往復摺動するタペツト１
５と前記ロツカーアーム本体３の一端との間には
プツシユロツド１６が設けられ、プツシユロツド
１６の上端に形成された凸球面部１７が前記当接
部材１２の凹球面部１１に当接されている。 Tappet 1 that slides back and forth due to rotation of cam 14
A push rod 16 is provided between the rocker arm body 3 and one end of the rocker arm body 3, and a convex spherical surface 17 formed at the upper end of the push rod 16 abuts against the concave spherical surface 11 of the abutment member 12.
このような構成において、まず、プツシユロツ
ド１６、ロツカーアーム本体３等の連動関係につ
いて説明する。第１図に示す状態からカム１４が
矢印Ａ方向に回転すると、タペツト１５及びプツ
シユロツド１６が上昇し、プツシユロツド１６の
凸球面部１７が当接部材１２の凹球面部１１を押
圧してロツカーアーム本体３を支軸２の軸心回り
に矢印Ｂ方向に回動させる。この回動により調整
ねじ７がハルブ９を下方向きに押圧し、バルブ９
はバルブスプリング１０の付勢力に抗して下方に
押し下げられる。そして、バルブ９がバルブシー
ト１８から離反し、吸気又は排気が行なわれる。
カム１４がさらに回転してカム１４の短径部がタ
ペツト１５に当接する状態になると、バルブ９を
下方向きに押圧する力が解除され、バルブスプリ
ング１０の付勢力によつてバルブ９が上方に押し
上げられ、ロツカーアーム本体３は矢印B′方向
に回動する。この回動によりプツシユロツド１６
及びタペツト１５が押し下げられ、タペツト１５
とカム１４との当接状態が維持される。このよう
にして、プツシユロツド１６とタペツト１５及び
バルブ９の往復摺動とロツカーアーム本体３の往
復回動とが連動して行なわれる。 In such a configuration, first, the interlocking relationship between the push rod 16, the rocker arm body 3, etc. will be explained. When the cam 14 rotates in the direction of arrow A from the state shown in FIG. is rotated around the axis of the support shaft 2 in the direction of arrow B. Due to this rotation, the adjustment screw 7 presses the valve 9 downward, and the valve 9
is pushed down against the urging force of the valve spring 10. Then, the valve 9 separates from the valve seat 18, and intake or exhaust is performed.
When the cam 14 rotates further and the short diameter part of the cam 14 comes into contact with the tappet 15, the force pressing the valve 9 downward is released, and the urging force of the valve spring 10 causes the valve 9 to move upward. The rocker arm body 3 is pushed up and rotated in the direction of arrow B'. Due to this rotation, the push rod 16
and the tappet 15 is pushed down, and the tappet 15
The state of contact between the cam 14 and the cam 14 is maintained. In this way, the reciprocating sliding movement of the push rod 16, tappet 15, and valve 9 and the reciprocating rotation of the rocker arm body 3 are performed in conjunction with each other.
つぎに、プツシユロツド１６の凸球面部１７が
当接される当接部材１２は板状部材をプレス加工
することにより成形されたものであり、加工コス
トが安く、板状で薄いために硬化処理を容易に行
なえる。また、当接部材１２は軽量であり、この
当接部材１２をロツカーアーム本体３に取付けた
場合にも重量の増加が少なく、このため、バルブ
スプリング１０のサージ限界周波数が上がり、高
速運転を行なえる。 Next, the contact member 12 that the convex spherical surface 17 of the push rod 16 comes into contact with is formed by pressing a plate-shaped member, and the processing cost is low, and since it is thin and plate-shaped, it cannot be hardened. Easy to do. In addition, the abutting member 12 is lightweight, and even when the abutting member 12 is attached to the rocker arm body 3, there is little increase in weight, which increases the surge limit frequency of the valve spring 10 and enables high-speed operation. .
さらに、当接部材１２の取付け穴５への取付け
を弾発的に行なつているため、取付け穴５の加工
に高精度を必要とせず、この取付け穴５の形成を
ドリル加工やダイカストにより容易に行なえる。
また、当接部材１２の取付け穴５への取付けが簡
単であり、しかも脱落しにくく、取付け穴５の上
方から押すことにより交換時の取外しを簡単に行
なえる。 Furthermore, since the contact member 12 is attached to the attachment hole 5 elastically, high precision is not required for machining the attachment hole 5, and the attachment hole 5 can be easily formed by drilling or die casting. can be done.
In addition, the abutment member 12 can be easily attached to the attachment hole 5, and does not easily fall off, and can be easily removed for replacement by pushing from above the attachment hole 5.
当接部材１２には複数個のスリツト１３が形成
されており、取付け穴５の上部から入り込んだ潤
滑油がこのスリツト１３を通して当接部材１２の
凹球面部１１と凸球面部１７との当接部分へ充分
に供給され、当接部材１２や凸球面部１７の摩耗
が低減される。 A plurality of slits 13 are formed in the abutting member 12, and the lubricating oil that enters from the upper part of the mounting hole 5 passes through the slits 13 and causes the concave spherical surface portion 11 and the convex spherical surface portion 17 of the abutment member 12 to come into contact with each other. The abrasion of the contact member 12 and the convex spherical surface portion 17 is reduced.
なお、本実施例においては、当接部材１２を摺
動部材であるプツシユロツド１６に当接させたも
のについて説明したが、この当接部材１２を摺動
部材であるバルブ９に当接する位置に設け、バル
ブ９の上端部に当接部材１２の凹球面部１１に当
接する凸球面部を形成してもよい。また、カムに
よりロツカーアームを直接駆動する形式の動弁機
構において、ロツカーアームの一端を支持するス
タツド式ラツシユアジヤスタの凸球面部との当接
部に用いてもよい。 In this embodiment, the abutting member 12 is brought into contact with the push rod 16, which is a sliding member. , a convex spherical surface portion that abuts the concave spherical surface portion 11 of the contact member 12 may be formed at the upper end portion of the bulb 9 . Further, in a valve operating mechanism in which a rocker arm is directly driven by a cam, the present invention may be used as a contact portion with a convex spherical portion of a stud type latch adjuster that supports one end of the rocker arm.
考案の効果
この考案は上述のように、ロツカーアーム本体
の一端側に段差部を有する円形の取付け穴を形成
し、プツシユロツドの凸球面部が当接する凹球面
部と放射状に形成された複数のスリツトとを有し
外形寸法が前記取付け穴の内径寸法より大きい板
状部材による当接部材を形成したので、当接部材
の加工と熱処理が容易であり、また、軽量である
ため、バルブスプリングのサージ限界周波数を上
げることができ、しかも、放射状に形成された複
数のスリツトが形成されているとともに外形寸法
が取付け穴の内径寸法よりも大きいため、取付け
穴にはめ込んで弾発的に保持させることが容易に
でき、高い寸法精度を必要とすることなくその組
立を容易に行うことができる等の効果を有するも
のである。Effects of the invention As described above, this invention forms a circular mounting hole with a stepped part on one end side of the rocker arm body, and has a concave spherical part that the convex spherical part of the push rod comes into contact with and a plurality of radially formed slits. Since the abutting member is formed of a plate-like member with an outer dimension larger than the inner diameter of the mounting hole, the abutting member is easy to process and heat-treat, and is lightweight, so it can reduce the surge limit of the valve spring. It can increase the frequency, and since it has multiple radially formed slits and its outer dimensions are larger than the inner diameter of the mounting hole, it is easy to fit into the mounting hole and hold it elastically. It has the advantage that it can be easily assembled without requiring high dimensional accuracy.
図面はこの考案の一実施例を示すもので、第１
図は縦断正面図、第２図は当接部材を拡大して示
す平面図、第３図はその縦断正面図である。
３……ロツカーアーム本体、５……取付け穴
（取付け部）、１１……凹球面部、１２……当接部
材、１７……凸球面部。
The drawing shows one embodiment of this invention.
The figure is a longitudinal sectional front view, FIG. 2 is a plan view showing an enlarged view of the abutting member, and FIG. 3 is a longitudinal sectional front view thereof. 3...Rotsuker arm main body, 5...Mounting hole (attachment part), 11...Concave spherical surface part, 12...Abutment member, 17...Convex spherical surface part.
Claims (1)
円形の取付け穴を形成し、プツシユロツドの凸球
面部が当接する凹球面部と放射状に形成された複
数のスリツトとを有し外形寸法が前記取付け穴の
内径寸法より大きい板状部材による当接部材を形
成し、この当接部材を前記取付け穴に弾発的には
め込んだことを特徴とするエンジンのロツカーア
ーム。 A circular mounting hole with a step is formed at one end of the rocker arm main body, and has a concave spherical surface against which the convex spherical surface of the push rod comes into contact, and a plurality of radially formed slits, the outer dimensions of which are the inner diameter of the mounting hole. A rocker arm for an engine, characterized in that an abutting member is formed of a plate-like member larger than the size of the abutting member, and the abutting member is elastically fitted into the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986010684U JPH0450405Y2 (en) | 1986-01-28 | 1986-01-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986010684U JPH0450405Y2 (en) | 1986-01-28 | 1986-01-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62124201U JPS62124201U (en) | 1987-08-07 |
| JPH0450405Y2 true JPH0450405Y2 (en) | 1992-11-27 |
Family
ID=30797206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986010684U Expired JPH0450405Y2 (en) | 1986-01-28 | 1986-01-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0450405Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5669410A (en) * | 1979-11-09 | 1981-06-10 | Ntn Toyo Bearing Co Ltd | Automatic lash adjuster for sealed-up valve and method of assembling said adjuster |
| JPS5929708A (en) * | 1982-08-10 | 1984-02-17 | Yanmar Diesel Engine Co Ltd | Valve arm device of internal combustion engine |
| US4440121A (en) * | 1982-04-30 | 1984-04-03 | General Motors Corporation | Locknut device for engine rocker arm adjustment |
-
1986
- 1986-01-28 JP JP1986010684U patent/JPH0450405Y2/ja not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5669410A (en) * | 1979-11-09 | 1981-06-10 | Ntn Toyo Bearing Co Ltd | Automatic lash adjuster for sealed-up valve and method of assembling said adjuster |
| US4440121A (en) * | 1982-04-30 | 1984-04-03 | General Motors Corporation | Locknut device for engine rocker arm adjustment |
| JPS5929708A (en) * | 1982-08-10 | 1984-02-17 | Yanmar Diesel Engine Co Ltd | Valve arm device of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62124201U (en) | 1987-08-07 |
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