JPH0324808Y2 - - Google Patents
Info
- Publication number
- JPH0324808Y2 JPH0324808Y2 JP1983201649U JP20164983U JPH0324808Y2 JP H0324808 Y2 JPH0324808 Y2 JP H0324808Y2 JP 1983201649 U JP1983201649 U JP 1983201649U JP 20164983 U JP20164983 U JP 20164983U JP H0324808 Y2 JPH0324808 Y2 JP H0324808Y2
- Authority
- JP
- Japan
- Prior art keywords
- push rod
- spherical surface
- roller tappet
- concave spherical
- convex spherical
- 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
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000002265 prevention 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〕
本考案は内燃機関の動弁用プツシユロツド装置
に関し、さらに具体的には、ローラタペツトによ
る動弁機構をもつた内燃機関のプツシユロツド装
置で、アジヤストスクリユーとの接触面が偏摩耗
しないプツシユロツド装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a push rod device for a valve train of an internal combustion engine, and more specifically, it is a push rod device for an internal combustion engine having a valve train mechanism using a roller tappet. This invention relates to a push rod device whose contact surface with a screw does not wear unevenly.
第５図に一例を縦断面図で示す従来のローラタ
ペツト１を使用した動弁機構においては、カム２
に従動するローラタペツト１が回転することを防
ぐ、回り止め用突起３をシリンダヘツド４側に設
け、この突起の一部をローラタペツト１の案内溝
５内に挿入してあるが、ローラタペツト１の穴１
Ａ内に下端を挿入したプツシユロツド６は、ロツ
カアーム７に支持したアジヤストスクリユー８及
びローラタペツト１と同一軸線上に配置してあ
る。
In a valve mechanism using a conventional roller tappet 1, an example of which is shown in a longitudinal cross-sectional view in FIG.
A rotation prevention protrusion 3 is provided on the cylinder head 4 side to prevent the driven roller tappet 1 from rotating, and a part of this protrusion is inserted into the guide groove 5 of the roller tappet 1.
A push rod 6 whose lower end is inserted into A is arranged on the same axis as an adjusting screw 8 supported on a rocker arm 7 and a roller tappet 1.
従来の装置では、カム２に従動してカムの１回
転ごとに上下動されるプツシユロツド６はローラ
タペツト１及びアジヤストスクリユー８と常に同
じ部分で摺接することになつて摺接部分が比較的
短い時間で摩耗するという問題点があつた。
In the conventional device, the push rod 6, which is driven by the cam 2 and moves up and down with each rotation of the cam, always makes sliding contact with the roller tappet 1 and the adjuster screw 8 at the same part, so the sliding contact part is relatively short. The problem was that it wore out over time.
本考案の目的はローラタペツトを使用した動弁
機構におけるプツシユロツド装置の前記問題点を
解消することにある。 An object of the present invention is to solve the above-mentioned problems of a push rod device in a valve train using a roller tappet.
本考案のプツシユロツド装置はプツシユロツド
の上端に凹球面を形成し、アジヤストスクリユー
の下端にこの凹球面の径よりも小径の凸球面を形
成し、プツシユロツドの軸線とアジヤストスクリ
ユーの軸線とをロツカアーム軸の軸線に平行な方
向に偏心させてプツシユロツドの上端の凹球面に
よりアジヤストスクリユーの凸球面を支持し、プ
ツシユロツドの下端を凸球面に形成して、この下
端をローラタペツトの穴内に挿入し、この凸球面
の径よりも大径の凹球面をローラタペツトの内底
面に形成し、この凹球面によりプツシユロツドを
支持してなることを特徴とする。
The push rod device of the present invention has a concave spherical surface formed at the upper end of the push rod, and a convex spherical surface smaller in diameter than the concave spherical surface at the lower end of the adjusting screw, so that the axis of the push rod and the axis of the adjusting screw are The convex spherical surface of the adjuster screw is supported by the concave spherical surface of the upper end of the push rod eccentrically in a direction parallel to the axis of the locking arm shaft, the lower end of the push rod is formed into a convex spherical surface, and this lower end is inserted into the hole of the roller tappet. A concave spherical surface having a diameter larger than that of the convex spherical surface is formed on the inner bottom surface of the roller tappet, and the push rod is supported by this concave spherical surface.
第１図は本考案装置の実施例の縦断側面図を示
し、第２図ａは第１図−線視断面図を示し、
第３図は第１図−線視断面図を示し、第４図
は第３図−線視拡大断面図を示す。
FIG. 1 shows a longitudinal side view of an embodiment of the device of the present invention, FIG. 2a shows a line sectional view taken from FIG. 1,
FIG. 3 shows a sectional view taken from FIG. 1, and FIG. 4 shows an enlarged sectional view taken from FIG. 3.
ローラタペツト１がカム２に従動し、回り止め
用突起３をシリンダヘツド４側に設け、突起３を
ローラタペツト１の案内溝５に挿入してある点に
おいては従来と同様である。 The roller tappet 1 is driven by a cam 2, a rotation preventing protrusion 3 is provided on the cylinder head 4 side, and the protrusion 3 is inserted into the guide groove 5 of the roller tappet 1, which is the same as the conventional one.
本考案の装置は、プツシユロツド６の下端を凸
球面６Ａに形成し、この凸球面６Ａの径よりも大
径の凹球面９Ａに内底面を形成したローラタペツ
トの穴９内にプツシユロツド６の下端を挿入し、
ローラタペツト１の凹球面９Ａによりプツシユロ
ツド６の凸球面６Ａを支持する。 In the device of the present invention, the lower end of the push rod 6 is formed into a convex spherical surface 6A, and the lower end of the push rod 6 is inserted into a hole 9 of a roller tappet whose inner bottom surface is formed into a concave spherical surface 9A having a diameter larger than that of the convex spherical surface 6A. death,
The concave spherical surface 9A of the roller tappet 1 supports the convex spherical surface 6A of the push rod 6.
プツシユロツド６の上端に凹球面６Ｂを形成
し、かつ、アジヤストスクリユー８の下端にプツ
シユロツド６の上端の凹球面６Ｂよりも小径の凸
球面８Ａを形成し、アジヤストスクリユー８はロ
ツクアーム７に螺着し、ナツト１０によつてゆる
み止めしてある。第２図ａにおいて、プツシユロ
ツド６の軸線ａとアジヤストスクリユー８の軸線
ｂとはロツカアーム軸１１の軸線に平行な方向に
偏心量ｍだけ偏心させて、プツシユロツド６の上
端の凹球面６Ｂがアジヤストスクリユー８の凸球
面８Ａを支持している。凹球面６Ｂと凸球面８Ａ
との接触点O2は凹球面６Ｂの中心O1から距離ｎ
だけ離れている（第２図ｂ）。 A concave spherical surface 6B is formed at the upper end of the push rod 6, and a convex spherical surface 8A having a smaller diameter than the concave spherical surface 6B at the upper end of the adjusting screw 8 is formed at the lower end of the adjusting screw 8. It is screwed on and secured with a nut 10. In FIG. 2a, the axis a of the push rod 6 and the axis b of the adjuster screw 8 are eccentric by an eccentric amount m in a direction parallel to the axis of the rocker arm shaft 11, so that the concave spherical surface 6B at the upper end of the push rod 6 is aligned with the axis b of the adjusting screw 8. The convex spherical surface 8A of the strike screw 8 is supported. Concave spherical surface 6B and convex spherical surface 8A
The contact point O 2 is at a distance n from the center O 1 of the concave spherical surface 6B.
(Figure 2b).
ローラタペツト１の穴９の開口端面には支持リ
ング１２を固着してあり、この支持リングの内縁
には先端縁がプツシユロツド６に接触するほぼ三
角形断面のゴム片１３，１３を取付けてある（第
４図）。ゴム片１３，１３の先端縁は第１図にお
いて紙面に平行する方向としてあり、傾動するプ
ツシユロツド６の左右方向の揺動を可能にしてい
る。 A support ring 12 is fixed to the open end surface of the hole 9 of the roller tappet 1, and rubber pieces 13, 13 of approximately triangular cross section are attached to the inner edge of this support ring, the tip edges of which contact the push rod 6 (fourth rubber piece). figure). The tip edges of the rubber pieces 13, 13 are oriented parallel to the plane of the drawing in FIG. 1, allowing the tilting push rod 6 to swing in the left-right direction.
なお、ゴム片１３はプツシユロツド６の周面に
取付け、ローラタペツト側にガイドとなる部材を
取付けてもよい。あるいは、ゴム片１３，１３は
シリンダヘツド側に取付けてもよい。 The rubber piece 13 may be attached to the circumferential surface of the push rod 6, and a member serving as a guide may be attached to the roller tappet side. Alternatively, the rubber pieces 13, 13 may be attached to the cylinder head side.
本考案のプツシユロツド装置は上記の構成から
なるので、カム２が回転するにつれてプツシユロ
ツド６が上下方向に移動せしめられると、プツシ
ユロツド６はアジヤストスクリユー８の先端から
力を加えられる。プツシユロツド６とアジヤスト
スクリユー８との接触点O2は凹球面６Ｂの中心
O1から距離ｎだけ離れているので、中心O1の周
りにモーメントが生じる。このモーメントによつ
てプツシユロツド６は僅かに回動せしめられる。 Since the push rod device of the present invention has the above structure, when the push rod 6 is moved in the vertical direction as the cam 2 rotates, a force is applied to the push rod 6 from the tip of the adjusting screw 8. The contact point O2 between the push rod 6 and the adjusting screw 8 is the center of the concave spherical surface 6B.
Since it is a distance n away from O 1 , a moment is created around the center O 1 . This moment causes the push rod 6 to rotate slightly.
プツシユロツド６の軸線ａとアジヤストスクリ
ユー８の軸線ｂとはロツカアーム軸１１の軸線に
平行な方向に偏心量ｍだけ偏心させてあることに
基づき、プツシユロツド６が上下方向に移動する
たびにプツシユロツド６は僅かに回動せしめら
れ、プツシユロツド６とアジヤストスクリユー８
との接触点O2は不規則的に変わるので、プツシ
ユロツド６とアジヤストスクリユー８との当たり
面に偏摩耗が生じるのを防止することができる。
Based on the fact that the axis a of the push rod 6 and the axis b of the adjuster screw 8 are eccentric by an eccentric amount m in a direction parallel to the axis of the rocker arm shaft 11, the push rod 6 moves upwardly and downwardly. is rotated slightly, and the push rod 6 and adjustment screw 8 are rotated slightly.
Since the contact point O 2 with the push rod 6 changes irregularly, it is possible to prevent uneven wear on the contact surface between the push rod 6 and the adjuster screw 8.
第１図は本考案装置の実施例の縦断側面図、第
２図ａは第１図−線視断面図、第２図ｂはプ
ツシユロツドとアジヤストスクリユーの当り面を
示す説明用の平面図、第３図は第１図−線視
断面図、第４図は第３図−線視拡大断面図、
第５図は従来の装置の縦断正面図を示す。
１……ローラタペツト、６……プツシユロツ
ド，６Ａ……プツシユロツドの下端の凸球面、６
Ｂ……プツシユロツドの上端の凹球面、８……ア
ジヤストスクリユー、８Ａ……アジヤストスクリ
ユーの凸球面、９……ローラタペツトの穴、９Ａ
……ローラタペツトの内底面の凹球面、１１……
ロツカアーム軸、ａ……プツシユロツドの軸線、
ｂ……アジヤストスクリユーの軸線。
FIG. 1 is a longitudinal sectional side view of an embodiment of the device of the present invention, FIG. 2 a is a cross-sectional view taken from the line of FIG. 1, and FIG. , FIG. 3 is a sectional view taken from FIG. 1, and FIG. 4 is an enlarged sectional view taken from FIG.
FIG. 5 shows a longitudinal sectional front view of a conventional device. 1...Roller tappet, 6...Push rod, 6A...Convex spherical surface at the lower end of the push rod, 6
B... Concave spherical surface at the upper end of the push rod, 8... Adjusting screw, 8A... Convex spherical surface of adjusting screw, 9... Hole in roller tappet, 9A
...Concave spherical surface of the inner bottom surface of the roller tappet, 11...
Locker arm axis, a... Axis of push rod,
b...Axis of the adjustment screw.
Claims (1)
し、アジヤストスクリユー８の下端にこの凹球面
６Ｂの径よりも小径の凸球面８Ａを形成し、プツ
シユロツド６の軸線ａとアジヤストスクリユー８
の軸線ｂとをロツカアーム軸１１の軸線に平行な
方向に偏心させてプツシユロツド６の上端の凹球
面６Ｂによりアジヤストスクリユー８の凸球面８
Ａを支持し、プツシユロツド６の下端を凸球面６
Ａに形成して、この下端をローラタペツト１の穴
９内に挿入し、この凸球面６Ａの径よりも大径の
凹球面９Ａをローラタペツト１の内底面に形成
し、この凹球面９Ａによりプツシユロツド６を支
持してなるプツシユロツド装置。 A concave spherical surface 6B is formed at the upper end of the push rod 6, and a convex spherical surface 8A having a smaller diameter than the concave spherical surface 6B is formed at the lower end of the adjusting screw 8.
The concave spherical surface 6B of the upper end of the push rod 6 causes the convex spherical surface 8 of the adjuster screw 8 to be eccentric in a direction parallel to the axis of the rocker arm shaft 11.
A is supported, and the lower end of the push rod 6 is connected to the convex spherical surface 6.
A, the lower end is inserted into the hole 9 of the roller tappet 1, a concave spherical surface 9A having a diameter larger than the diameter of the convex spherical surface 6A is formed on the inner bottom surface of the roller tappet 1, and the push rod 6 is A push rod device that supports the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20164983U JPS60112606U (en) | 1983-12-29 | 1983-12-29 | push rod device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20164983U JPS60112606U (en) | 1983-12-29 | 1983-12-29 | push rod device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60112606U JPS60112606U (en) | 1985-07-30 |
| JPH0324808Y2 true JPH0324808Y2 (en) | 1991-05-30 |
Family
ID=30763640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20164983U Granted JPS60112606U (en) | 1983-12-29 | 1983-12-29 | push rod device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60112606U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020015116A (en) * | 2000-08-21 | 2002-02-27 | 이계안 | Gap adjusting instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56145606U (en) * | 1980-04-01 | 1981-11-02 |
-
1983
- 1983-12-29 JP JP20164983U patent/JPS60112606U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60112606U (en) | 1985-07-30 |
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