JPH0450407Y2 - - Google Patents
Info
- Publication number
- JPH0450407Y2 JPH0450407Y2 JP1983114405U JP11440583U JPH0450407Y2 JP H0450407 Y2 JPH0450407 Y2 JP H0450407Y2 JP 1983114405 U JP1983114405 U JP 1983114405U JP 11440583 U JP11440583 U JP 11440583U JP H0450407 Y2 JPH0450407 Y2 JP H0450407Y2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic tappet
- valve
- locking hole
- hydraulic
- tappet
- 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
- 230000005484 gravity Effects 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は油圧タペツト構造に係り、特にエンジ
ン製造時やメンテナンス時の組付作業性を改善で
きる構造簡単な油圧タペツト構造に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hydraulic tappet structure, and more particularly to a hydraulic tappet structure with a simple structure that can improve assembly workability during engine manufacturing and maintenance.
［従来の技術］
一般に内燃機関の動弁機構は、摩耗や熱膨張の
影響を受け易く、運転中のタペツトクリアランス
が変化する。このようなタペツトクリアランスの
変化を適正に補正するための装置として、従来油
圧タペツトが知られており、通常カムからバルブ
ステムの間に介設されている。ところで本出願人
は、この油圧タペツトを改良し、タペツトクリア
ランスの補正機能のみならず、可変気筒機関のポ
ンピングロスを排除する弁停止機構として機能さ
せ得る油圧タペツトを提案した（後に略述する）。
この提案の実施上、第３図に示すように油圧タペ
ツトａ…は、上端側がエンジン本体ｂの上蓋たる
ハウジングｃ内に摺動自在に収容され、下端側が
ロツカーアームｄを介してエンジン本体ｂ内のカ
ム、バルブステム等の動弁機構ｅ上に重力方向に
フローテイング状態で支持される。[Prior Art] Generally, the valve mechanism of an internal combustion engine is susceptible to wear and thermal expansion, and the tappet clearance changes during operation. A hydraulic tappet is conventionally known as a device for appropriately correcting such changes in tappet clearance, and is usually interposed between the cam and the valve stem. By the way, the present applicant has improved this hydraulic tappet and proposed a hydraulic tappet that can function not only as a tappet clearance correction function but also as a valve stop mechanism to eliminate pumping loss of a variable cylinder engine (described briefly later). .
In implementing this proposal, as shown in Fig. 3, the upper end of the hydraulic tappet a is slidably housed in the housing c, which is the top cover of the engine body B, and the lower end is housed inside the engine body B via the rocker arm d. It is supported in a floating state in the direction of gravity on a valve mechanism e such as a cam and a valve stem.
ところで従来、エンジンの製造時やメンテナン
ス時等、各気筒の吸排気弁それぞれに油圧タペツ
トａを組付けるに際しては、ハウジングｃを上下
逆にして油圧タペツトａを落とし込んで挿入し、
爾後第４図に示すように、ハウジングｃを反転さ
せて動弁機構ｅ上に支持させるようにしていた。
ところが油圧タペツトａは動弁機構ｅ上で初めて
支持されるものあるから、ハウジングｃを反転す
ると自由に落下してしまい、組付け難いという問
題があつた。エンジン本体ｂを逆に吊つて組付け
ることは非常に面倒な作業となり好ましくなかつ
た。 By the way, conventionally, when assembling the hydraulic tappet a to each intake and exhaust valve of each cylinder during engine manufacturing or maintenance, the housing c is turned upside down and the hydraulic tappet a is dropped and inserted.
Thereafter, as shown in FIG. 4, the housing c was inverted and supported on the valve mechanism e.
However, since the hydraulic tappet (a) is supported for the first time on the valve train (e), when the housing (c) is turned over, it falls freely and is difficult to assemble. Assembling the engine body b by hanging it upside down is a very troublesome task, which is not desirable.
なお関連技術として実開昭58−32111号公報に
は油圧タペツトを挿入する収容部の手前側にリン
グ収容溝を形成し、この収容部に収容した溝用リ
ングによつて油圧タペツトを支承するように構成
した提案が、特開昭57−129211号公報には断面円
形のバネ素材をリング状に成形して成る圧縮ばね
を油圧タペツトの外周に設け、この圧縮ばねを油
圧タペツト収容部の上縁に係止されることによつ
て油圧タペツトを吊架するようにした提案が開示
されている。 As a related technology, Japanese Utility Model Application Publication No. 58-32111 discloses a method in which a ring housing groove is formed on the front side of a housing part into which a hydraulic tappet is inserted, and the hydraulic tappet is supported by the groove ring housed in this housing part. JP-A-57-129211 proposes a compression spring formed by molding a spring material with a circular cross section into a ring shape on the outer periphery of the hydraulic tappet, and this compression spring is attached to the upper edge of the hydraulic tappet accommodating part. A proposal has been disclosed in which a hydraulic tappet is suspended by being locked to.
［考案が解決しようとする課題］
上記提案を採用すると油圧タペツトは固定側に
形成されたタペツト収容部に落下なく係止される
ようになる。しかし、これらの提案の溝用リング
及び圧縮ばねは、その取付けにおいて、変形を防
止するために専用の工具が必要になりまた細心の
注意を払つて取付ける必要があることや、作業
性、メンテナンス及び係脱の信頼性において未だ
改良の余地がある。[Problems to be Solved by the Invention] If the above proposal is adopted, the hydraulic tappet will be locked in the tappet accommodating portion formed on the stationary side without falling. However, these proposed groove rings and compression springs require special tools to prevent deformation, require careful installation, and have problems with workability, maintenance, and maintenance. There is still room for improvement in the reliability of engagement and disengagement.
本考案の目的は、油圧タペツトの挿入側先端に
一体的に油圧タペツトを係脱自在に係止して吊架
しておくためのストツパを設け、特別な工具を必
要とせずにその係脱を可能とすると共に、油圧タ
ペツトをその収容位置においてガタ付きなく保持
してメンテナンスや組付け時の作業性を改善でき
る構成の油圧タペツト構造を提供するにある。 The purpose of the present invention is to provide a stopper integrally at the insertion end of the hydraulic tappet for releasably locking the hydraulic tappet and suspending it, so that it can be locked and disconnected without the need for special tools. It is an object of the present invention to provide a hydraulic tappet structure capable of improving workability during maintenance and assembly by holding the hydraulic tappet in its storage position without wobbling.
［課題を解決するための手段］
本考案は上記目的を達成するために、カム、バ
ルブステム等の動弁機構に支持されて重力方向下
方に臨んで固定側に垂設され、油圧力によりロツ
カシヤフトを支承する油圧タペツトと、この油圧
タペツトを抜差し自在に収容すべく上記固定側に
圧入されたスリーブと、固定側、スリーブ及び油
圧タペツトに同軸的に形成された一連の弁案内孔
と、スリーブ及び油圧タペツト天井部の弁案内孔
を拡径して形成した係止孔と、スリーブ直上の弁
案内孔を上記係止孔より大きく拡径して形成され
た第１筒状係合部と、油圧タペツトの天井部直下
を上記係止孔より大きく拡径して形成された第２
筒状係合部と、これら第１、第２筒状係合部に係
合して固定側に油圧タペツトを吊架するためのス
トツパとを備え、上記ストツパは、上記係止孔と
係合する外径、軸長で筒状に形成されると共にそ
の両端に上記第１、第２筒状係合部と夫々係合す
るバルジ部を有し、これらバルジ部にその弾性的
な拡・縮を許容する切欠きを円周方向に間隔をお
いて形成したものである。[Means for Solving the Problems] In order to achieve the above object, the present invention is supported by a valve mechanism such as a cam and a valve stem, is vertically installed on a stationary side facing downward in the direction of gravity, and is mounted on a locking shaft by hydraulic pressure. a hydraulic tappet that supports the hydraulic tappet; a sleeve press-fitted into the stationary side to removably accommodate the hydraulic tappet; a series of valve guide holes coaxially formed in the stationary side, the sleeve, and the hydraulic tappet; A locking hole formed by enlarging the diameter of the valve guide hole in the ceiling of the hydraulic tappet; a first cylindrical engagement portion formed by expanding the valve guide hole directly above the sleeve to a larger diameter than the locking hole; A second hole is formed with a diameter larger than that of the above-mentioned locking hole just below the ceiling of the tapepet.
a cylindrical engaging portion; and a stopper that engages with the first and second cylindrical engaging portions to suspend the hydraulic tappet on the fixed side; the stopper engages with the locking hole; It is formed into a cylindrical shape with an outer diameter and axial length of Notches are formed at intervals in the circumferential direction to allow this.
［作用］
油圧タペツトを組み付ける際は、まずストツパ
の下部側のバルジ部を、プランジヤの係止孔に挿
入する。弁案内孔の反力により、切欠によつて独
立的に区分された下側のバルジ部はそれぞれ弾性
変形を起こし縮径される。下部側のバルジ部は係
止孔の通過後、縮径によつて蓄えた弾発力を一気
に解放して第２筒状係合部内で復元して係合す
る。この結果、油圧タペツトとストツパとは一体
化する。[Operation] When assembling the hydraulic tappet, first insert the lower bulge portion of the stopper into the locking hole of the plunger. Due to the reaction force of the valve guide hole, the lower bulge portions independently divided by the notches are elastically deformed and reduced in diameter. After passing through the locking hole, the lower bulge part releases the resilient force accumulated by the diameter reduction at once, and is restored and engaged within the second cylindrical engaging part. As a result, the hydraulic tappet and stopper become integrated.
次にストツパを一体的に有した油圧タペツト
を、スリーブ内に挿入する。すると今度は上端側
のバルジ部がスリーブの係止孔に嵌合し係止孔の
反力により弾性的に縮径される。下部側のバルジ
部は係止孔の通過後、縮径によつて蓄えた弾発力
を一気に解放して第１筒状係合部内で復元し係合
する。この結果、第２筒状係合部に上方のバルジ
部が係合され下方のバルジ部に油圧タペツトが吊
架されようになり、これらバルジ部によつて上記
係止孔を形成する部分が弾性的に挟み込まれるよ
うになる。油圧タペツトを取外す際は、油圧タペ
ツトの引抜きによつて第１筒状係合部から下側の
バルジ部を離脱させる。 A hydraulic tappet with an integral stop is then inserted into the sleeve. Then, the bulge portion on the upper end side fits into the locking hole of the sleeve and is elastically reduced in diameter by the reaction force of the locking hole. After passing through the locking hole, the lower bulge part releases the elastic force accumulated by the diameter reduction at once, and returns to its original state and engages within the first cylindrical engaging part. As a result, the upper bulge part is engaged with the second cylindrical engaging part, and the hydraulic tappet is suspended from the lower bulge part, and the part forming the locking hole is made elastic by these bulge parts. become trapped. When removing the hydraulic tappet, the lower bulge portion is separated from the first cylindrical engagement portion by pulling out the hydraulic tappet.
［実施例］
以下に本考案の好適一実施例を添付図面に基づ
いて説明する。[Embodiment] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
まず、タペツトクリアランスの補正機能と可変
気筒機関の弁停止機構としての機能を第１図に基
づいて詳述しておく。 First, the tappet clearance correction function and the valve stop mechanism function of the variable cylinder engine will be explained in detail with reference to FIG.
既知のように動弁機構１は、主にカム２、バル
ブステム３、バルブスプリング４、ロツカアーム
５及びロツカシヤフト６とから構成され、回動さ
れるカム２の突上力とバルブスプリング４の付勢
力とでロツカアーム５がロツカシヤフト６回りに
揺動されて弁が開閉動される。 As is known, the valve mechanism 1 is mainly composed of a cam 2, a valve stem 3, a valve spring 4, a rocker arm 5, and a rocker shaft 6, and the thrust force of the rotated cam 2 and the biasing force of the valve spring 4 are As a result, the rocker arm 5 is swung around the rocker shaft 6, and the valve is opened and closed.
(1) タペツトクリアランスの補正機能について
固定側を構成するハウジング７にはスリーブ８
が圧入嵌装され、このスリーブ８には動弁機構１
に支持されるべく重力方向下方に臨んで油圧タペ
ツト９が垂設される。この油圧タペツト９は、ス
リーブ８に摺動自在に挿入されたリフタ１０と、
これらリフタ１０とスリーブ８とによつて区画形
成された油室１１内を区画してリフタ１０との間
に圧力室１２を形成すべくリフタ１０に摺接され
たプランジヤ１３と、プランジヤ１３の下端に開
放され圧力室１２と油室１１とを連通させる圧給
排口１４を開閉するためのチエツクボール１５と
から主に構成される。油室１１には、作動油供給
路が連結される。プランジヤ１３はリフタ１０と
の間に介設されたバネ１６でスリーブ８の天井部
８ａに当接される。チエツクボール１５は、圧力
室１２側から圧給排口１４を囲繞するリテーナ１
７内に収容され、チエツクボールバネ１８の付勢
力を受けて圧給排口１４を閉成するように構成さ
れる。リテーナ１７には、作動油を流通させる通
孔１７ａ…が形成される。リフタ１０の下部には
ロツカシヤフト６を回転自在に支持するサポート
ブラケツト１９が連接される。(1) About the tapepet clearance correction function The housing 7 that constitutes the fixed side has a sleeve 8.
is press-fitted into the sleeve 8, and the valve mechanism 1 is press-fitted into the sleeve 8.
A hydraulic tappet 9 is vertically disposed facing downward in the direction of gravity to be supported by the tappet. This hydraulic tappet 9 includes a lifter 10 slidably inserted into the sleeve 8;
A plunger 13 slidingly contacts the lifter 10 to partition the oil chamber 11 defined by the lifter 10 and the sleeve 8 and form a pressure chamber 12 between the lifter 10 and the lower end of the plunger 13. It is mainly composed of a check ball 15 for opening and closing a pressure supply/discharge port 14 which is opened to the pressure chamber 12 and the oil chamber 11 and communicates with each other. A hydraulic oil supply path is connected to the oil chamber 11 . The plunger 13 is brought into contact with the ceiling portion 8a of the sleeve 8 by a spring 16 interposed between the plunger 13 and the lifter 10. The check ball 15 is attached to the retainer 1 surrounding the pressure supply/discharge port 14 from the pressure chamber 12 side.
7, and is configured to close the pressure supply/discharge port 14 by receiving the biasing force of the check ball spring 18. The retainer 17 is formed with through holes 17a through which hydraulic oil flows. A support bracket 19 that rotatably supports the rocker shaft 6 is connected to the lower part of the lifter 10.
このように構成された油圧タペツト９は動弁機
構１上に重力方向にフローテイング状態で支持さ
れる。 The hydraulic tappet 9 thus constructed is supported on the valve train 1 in a floating state in the direction of gravity.
閉弁時にあつては、チエツクボール１５が圧給
排口１４を閉じており、作動油が充満された圧力
室１２の油圧力が保持されている。この油圧力
は、プランジヤ１３を介してハウジング７側に反
力をとつてリフタ１０を押し下げロツカアーム５
をカム２とバルブステム３に押し付けるようにし
てロツカシヤフト６を支承している。カムリフト
が開始されるとその突上力が圧力室１２の内圧を
順次高める。このとき作動油はプランジヤ１３と
リフタ１０との摺接面から僅かにリークしリフタ
１０、ロツカシヤフト６が若干上昇するも突上力
はロツカアーム５を揺動させて弁を開作動させ
る。上記リークは弁リフトロスとして閉弁時の弁
着座を確実にさせる。爾後バルブスプリング４に
復帰されて閉弁されると、バネ１６が弁リフトロ
ス分だけ上方へ摺動したリフタ１０を押し下げる
ことになりチエツクボール１５が圧給排口１４を
開く。そして新たな作動油が圧力室１２内に供給
され次の弁リフトに備える。 When the valve is closed, the check ball 15 closes the pressure supply/discharge port 14, and the hydraulic pressure in the pressure chamber 12 filled with hydraulic oil is maintained. This hydraulic pressure exerts a reaction force on the housing 7 side via the plunger 13 to push down the lifter 10 and the rocker arm 5.
The rock shaft 6 is supported by being pressed against the cam 2 and the valve stem 3. When the cam lift is started, the upward force increases the internal pressure of the pressure chamber 12 one after another. At this time, the hydraulic oil slightly leaks from the sliding surface between the plunger 13 and the lifter 10, and the lifter 10 and the rocker shaft 6 rise slightly, but the upward force causes the rocker arm 5 to swing and open the valve. The above leak acts as a valve lift loss and ensures that the valve is seated when the valve is closed. When the valve is then returned to its original state by the valve spring 4 and the valve is closed, the spring 16 pushes down the lifter 10 which has been slid upward by the valve lift loss, and the check ball 15 opens the pressure supply/discharge port 14. New hydraulic fluid is then supplied into the pressure chamber 12 in preparation for the next valve lift.
(2) 可変気筒機関の弁停止機構としての機能につ
いて
停止すべき気筒に備えられた電磁ソレノイドを
励磁すると弁ロツド２０が進み出てチエツクボー
ル１５を押し下げ圧給排口１４が常開される。従
つて圧力室１２は油圧力を保持できなくなり、カ
ム２の突上力はロツカシヤフト６、リフタ１０の
上昇移動力に費やされ、爾後ロツカアーム５はバ
ルブステム３に係合する一端を支点として往復揺
動され弁作動が断たれて閉弁状態が維持される。
尚、リフタ１０の下方移動はバネ１６の付勢力に
よる。(2) Regarding the function as a valve stop mechanism for a variable cylinder engine When the electromagnetic solenoid provided in the cylinder to be stopped is energized, the valve rod 20 advances and pushes down the check ball 15, so that the pressure supply/discharge port 14 is normally opened. Therefore, the pressure chamber 12 is no longer able to hold the hydraulic pressure, and the thrusting force of the cam 2 is used for the upward movement force of the rocker shaft 6 and lifter 10, and the rocker arm 5 then reciprocates using the one end that engages with the valve stem 3 as a fulcrum. The valve is oscillated, the valve operation is cut off, and the valve is maintained in the closed state.
Note that the downward movement of the lifter 10 is due to the biasing force of the spring 16.
ところで本考案の特長とするところは上述した
ような作動を確保すべくハウジング７内に摺動自
在に重力方向下方に臨んで垂設され、かつ動弁機
構１上にフローテイグ状態で支持される油圧タペ
ツト９を、その機能を阻害することなく容易かつ
迅速に組み付け得るストツパ２１にある。 By the way, the feature of the present invention is that in order to ensure the above-mentioned operation, the hydraulic pressure is slidably installed vertically in the housing 7 facing downward in the direction of gravity, and is supported in a floating state on the valve mechanism 1. The stopper 21 allows the tappet 9 to be easily and quickly assembled without interfering with its function.
第１図に示すように本考案に係るストツパは、
油圧タペツト９の機能上昇降作動されるリフタ１
０でなく、油圧室１２内のバネ１６に付勢されて
固定的なプランジヤ１３の上端部に設けられる。 As shown in Fig. 1, the stopper according to the present invention is
Lifter 1 operated to raise and lower the function of hydraulic tappet 9
0, and is biased by a spring 16 in the hydraulic chamber 12 and provided at the upper end of the fixed plunger 13.
弁ロツド２０の挿入用としてスリーブ８の天井
部８ａ及びプランジヤ１３の天井部１３ｂにそれ
ぞれ形成された弁案内孔８ｆ，８ｇは、径大に拡
径されて１つの係止孔８ｄを構成している。一方
ハウジング７の弁案内孔８ｅは天井部８ａ直上部
分が上記係止孔８ｄより大きく半径方向に拡径さ
れて筒状の凹陥部７ａを構成している。この凹陥
部７ａと油室１１との間に本考案に係るストツパ
２１が設けられる。 Valve guide holes 8f and 8g formed in the ceiling part 8a of the sleeve 8 and the ceiling part 13b of the plunger 13, respectively, for insertion of the valve rod 20 are enlarged in diameter to form one locking hole 8d. There is. On the other hand, a portion of the valve guide hole 8e of the housing 7 directly above the ceiling portion 8a is expanded in diameter in the radial direction to be larger than the locking hole 8d, thereby forming a cylindrical recessed portion 7a. A stopper 21 according to the present invention is provided between the concave portion 7a and the oil chamber 11.
ストツパ２１は上記係止孔８ｄと係合する外形
寸法で筒体状に形成され、第２図にも示す如く上
記係止孔８ｄに係合されてその係止孔８ｄと同等
の軸長寸法の筒部を除く上下端側が樽状にバルジ
加工されて形成されている。そしてこれらバルジ
部２１ｃ…には、その円周方向において適宜切欠
き２１ｄ…が入れられ、切欠き２１ｄによつて区
分された各バルジ部２１ｃ…がそれぞれ径方向に
独立して弾発性を発揮し得るように成型されてい
る。これに対しプランジヤ１３の上端部内周壁に
は、上記弁案内孔８ｇ直下の部位が上記係止孔８
ｄより大きく筒状に拡径されて形成され、下方の
バルジ部２１ｃを収容しつつこのバルジ部２１ｃ
にプランジヤ１３を係止させるための環状の係止
端１３ｂを形成すべく筒状溝１３ｃが設けられて
いる。つまりストツパ２１は、上方のバルジ部２
１ｃがプランジヤ１３の天井部８ａに着脱自在に
係合支持され、下方のバルジ部２１ｃで油圧タペ
ツト９を係止してその落下を規正するように形成
されている。なお実施例において上記凹陥部７ａ
が第１筒状係合部となり、筒状溝１３ｃが第２筒
状係合部となる。また、バルジ部２１ｃ…の両端
は、脱着の容易性が図られるべくテーパ状に形成
されている。２３はスナツプリングであり、リフ
タ１０をプランジヤ１３に摺動自在に係止させ油
圧タペツト９を一体化するためのものである。 The stopper 21 is formed into a cylindrical shape with an external dimension that engages with the locking hole 8d, and as shown in FIG. The upper and lower ends, excluding the cylindrical portion, are bulged into a barrel shape. These bulge portions 21c are provided with appropriate notches 21d in the circumferential direction, and each bulge portion 21c divided by the notches 21d exhibits elasticity independently in the radial direction. It is molded so that it can be used. On the other hand, on the inner circumferential wall of the upper end of the plunger 13, the portion directly below the valve guide hole 8g is located at the locking hole 8.
It is formed into a cylindrical shape with a larger diameter than d, and accommodates the lower bulge part 21c.
A cylindrical groove 13c is provided to form an annular locking end 13b for locking the plunger 13. In other words, the stopper 21
1c is removably engaged with and supported by the ceiling portion 8a of the plunger 13, and is formed so as to lock the hydraulic tappet 9 at the lower bulge portion 21c to prevent it from falling. Note that in the embodiment, the recessed portion 7a
becomes the first cylindrical engaging portion, and the cylindrical groove 13c becomes the second cylindrical engaging portion. Further, both ends of the bulge portions 21c are formed into a tapered shape for ease of attachment and detachment. Numeral 23 is a snap ring, which is used to slidably lock the lifter 10 to the plunger 13 and integrate the hydraulic tappet 9.
次に油圧タペツト９とストツパ２１の取付けに
ついて説明する。 Next, the installation of the hydraulic tappet 9 and the stopper 21 will be explained.
油圧タペツト９を組み付ける際は、まずストツ
パ２１の下部側のバルジ部２１ｃを、プランジヤ
１３の弁案内孔８ｇに挿入する。この挿入により
下部側のバルジ部２１ｃは弁案内孔８ｇの反力に
より弾性的に縮径される。下部側のバルジ部２１
ｃは弁案内孔８ｇの通過後、縮径によつて蓄えた
弾発力を一気に解放して筒状溝１３ｃ内で復元す
る。この結果油圧タペツト９とストツパ２１とは
一体化する。 When assembling the hydraulic tappet 9, first insert the lower bulge portion 21c of the stopper 21 into the valve guide hole 8g of the plunger 13. By this insertion, the diameter of the lower bulge portion 21c is elastically reduced by the reaction force of the valve guide hole 8g. Lower bulge part 21
After c passes through the valve guide hole 8g, the resilient force accumulated by the diameter reduction is released all at once, and the valve returns to its original state within the cylindrical groove 13c. As a result, the hydraulic tappet 9 and the stopper 21 are integrated.
次にストツパ２１を一体的に有した油圧タペツ
ト９を、スリーブ８内に挿入する。すると今度は
上端側のバルジ部２１ｃがスリーブ８の弁案内孔
８ｆに嵌合し弁案内孔８ｆの反力により弾性的に
縮径される。下部側のバルジ部２１ｃは弁案内孔
８ｆの通過後、縮径によつて蓄えた弾発力を一気
に解放して凹陥部７ａ内で復元する。この結果、
凹陥部７ａに上方のバルジ部２１ｃが係合され下
方のバルジ部２１ｃに油圧タペツト９が吊架され
ようになる。油圧タペツト９を取外す際は、油圧
タペツト９の引抜きによつて環状溝１３ｃから下
側のバルジ部２１ｃを離脱させる。 The hydraulic tappet 9 with the integral stopper 21 is then inserted into the sleeve 8. Then, the bulge portion 21c on the upper end side fits into the valve guide hole 8f of the sleeve 8, and is elastically reduced in diameter by the reaction force of the valve guide hole 8f. After the lower bulge portion 21c passes through the valve guide hole 8f, the resilient force accumulated by the diameter reduction is released all at once, and the bulge portion 21c returns to its original state within the concave portion 7a. As a result,
The upper bulge portion 21c is engaged with the recessed portion 7a, and the hydraulic tappet 9 is suspended from the lower bulge portion 21c. When removing the hydraulic tappet 9, the lower bulge portion 21c is removed from the annular groove 13c by pulling out the hydraulic tappet 9.
このように本考案ではストツパ２１の係脱にお
いて実開昭58−32111号公報等とは異なつて特種
な工具を必要とせず、また通常のスナツプリング
的なものと比較して係脱を繰返してもへたりがな
く寿命的に有利となる。 In this way, the present invention does not require any special tools for engaging and disengaging the stopper 21, unlike in Japanese Utility Model Application Publication No. 58-32111, etc., and it does not require repeated engagement and disengagement compared to a normal snap spring type. It does not wear out and is advantageous in terms of lifespan.
［考案の効果］
以上説明したことから明らかなように本考案に
よれば次の如き優れた効果を発揮する。[Effects of the Invention] As is clear from the above explanation, the present invention provides the following excellent effects.
(1) 筒状のストツパの両端に係止孔と係脱するバ
ルジ部を形成し、それらバルジ部に円周方向に
間隔をおいて切欠きを形成し、そしてこれらバ
ルジ部間の筒部が係止孔と係合するようにし、
切欠によつて独立した弾性を発揮する両バルジ
部により係止孔を挟み込むことができるように
構成したので、正規の位置（完全収容位置）に
油圧タペツトをガタつきなく保持でき、ロツカ
シヤフトに対する組付作業性を大巾に改善でき
る。(1) A bulge portion that engages and disengages from the locking hole is formed at both ends of a cylindrical stopper, notches are formed in the bulge portions at intervals in the circumferential direction, and a cylindrical portion between these bulge portions is formed. so that it engages with the locking hole,
Since the locking hole is constructed so that the locking hole can be sandwiched between the two bulge parts that exhibit independent elasticity due to the notch, the hydraulic tappet can be held in the normal position (fully housed position) without wobbling, and it is easy to assemble to the rock shaft. Work efficiency can be greatly improved.
(2) バルジ部に円周方向に間隔をおいて複数の切
欠きを形成したので、切欠きによつて区分され
たバルジ部が独立して弾性を発揮するようにな
り、係脱機能の向上と、係脱の信頼性を著しく
改善できる。(2) Since multiple notches are formed in the bulge part at intervals in the circumferential direction, the bulge parts divided by the notches can exert elasticity independently, improving the engagement and disengagement function. , the reliability of engagement and disengagement can be significantly improved.
(3) エンジンの組立で時やメンテナンス時の作業
性を大巾に改善できる。(3) Workability during engine assembly and maintenance can be greatly improved.
(4) ストツパの剛性が高いので信頼性を向上でき
る。(4) High rigidity of the stopper improves reliability.
第１図は本考案の好適一実施例を示す断面図、
第２図は本考案に係るストツパを示す斜視図、第
３図は従来例を示す概略側面図、第４図は従来の
組付け状態を示す概略側面図である。
図中、２はカム、３はバルブステム、６ロツカ
シヤフト、７ａは第１筒状係合部たる凹陥部、８
はスリーブ、８ｄは係止孔、９は油圧タペツト、
８ｅ，８ｆ，８ｇは弁案内孔、１３ｃは第２筒状
係合部たる筒状溝、２１はストツパ、２１ｃはバ
ルジ部、２１ｄは切欠きである。
FIG. 1 is a sectional view showing a preferred embodiment of the present invention;
FIG. 2 is a perspective view showing a stopper according to the present invention, FIG. 3 is a schematic side view showing a conventional example, and FIG. 4 is a schematic side view showing a conventional assembled state. In the figure, 2 is a cam, 3 is a valve stem, 6 is a rocker shaft, 7a is a concave portion that is a first cylindrical engagement portion, and 8
is a sleeve, 8d is a locking hole, 9 is a hydraulic tappet,
8e, 8f, and 8g are valve guide holes, 13c is a cylindrical groove serving as a second cylindrical engagement portion, 21 is a stopper, 21c is a bulge portion, and 21d is a notch.
Claims (1)
重力方向下方に臨んで固定側に垂設され、油圧力
によりロツカシヤフトを支承する油圧タペツト
と、該タペツトを抜差し自在に収容すべく上記固
定側に圧入されたスリーブと、固定側、スリーブ
及び油圧タペツトに同軸的に形成された一連の弁
案内孔と、スリーブ及び油圧タペツト天井部の弁
案内孔を拡径して形成した係止孔と、スリーブ直
上の弁案内孔を上記係止孔より大きく拡径して形
成された第１筒状係合部と、油圧タペツトの天井
部直下を上記係止孔より大きく拡径して形成され
た第２筒状係合部と、これら第１、第２筒状係合
部に係合して固定側に油圧タペツトを吊架するた
めのストツパとを備え、上記ストツパは、上記係
止孔と係合する外径、軸長で筒状に形成されると
共にその両端に上記第１、第２筒状係合部と夫々
係合するバルジ部を有し、これらバルジ部にその
弾性的な拡・縮を許容する切欠きを円周方向に間
隔をおいて形成したことを特徴とする油圧タペツ
ト構造。 A hydraulic tappet is supported by a valve mechanism such as a cam and a valve stem, and is vertically installed on the fixed side facing downward in the direction of gravity, and supports the rocker shaft by hydraulic pressure, and a hydraulic tappet is installed on the fixed side to accommodate the tappet so that it can be freely inserted and removed. A press-fitted sleeve, a series of valve guide holes formed coaxially on the fixed side, the sleeve and the hydraulic tappet, a locking hole formed by expanding the diameter of the valve guide hole in the sleeve and the ceiling of the hydraulic tappet, and the sleeve. A first cylindrical engaging portion formed by expanding the diameter of the valve guide hole directly above the locking hole to a larger diameter than the locking hole, and a second cylindrical engaging portion formed by expanding the diameter of the valve guide hole directly below the ceiling portion of the hydraulic tappet to a larger diameter than the locking hole. A cylindrical engaging portion, and a stopper for suspending the hydraulic tappet on the fixed side by engaging with the first and second cylindrical engaging portions, the stopper engaging with the locking hole. It is formed into a cylindrical shape with an outer diameter and axial length of A hydraulic tappet structure characterized in that notches are formed at intervals in the circumferential direction to allow for.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11440583U JPS6023201U (en) | 1983-07-25 | 1983-07-25 | hydraulic tappet structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11440583U JPS6023201U (en) | 1983-07-25 | 1983-07-25 | hydraulic tappet structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6023201U JPS6023201U (en) | 1985-02-18 |
| JPH0450407Y2 true JPH0450407Y2 (en) | 1992-11-27 |
Family
ID=30264474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11440583U Granted JPS6023201U (en) | 1983-07-25 | 1983-07-25 | hydraulic tappet structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6023201U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4731521B2 (en) * | 2007-06-04 | 2011-07-27 | 株式会社オティックス | Rash adjuster and retainer assembly method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57129211A (en) * | 1980-12-22 | 1982-08-11 | Stanadyne Inc | Self-compensation liquid pressure drive adjuster |
| JPS5832111B2 (en) * | 1977-07-07 | 1983-07-11 | 日産自動車株式会社 | Strain prevention structure of molded corrugated board |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5832111U (en) * | 1981-08-28 | 1983-03-02 | 日鍛バルブ株式会社 | Valve mechanism of internal combustion engine |
-
1983
- 1983-07-25 JP JP11440583U patent/JPS6023201U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5832111B2 (en) * | 1977-07-07 | 1983-07-11 | 日産自動車株式会社 | Strain prevention structure of molded corrugated board |
| JPS57129211A (en) * | 1980-12-22 | 1982-08-11 | Stanadyne Inc | Self-compensation liquid pressure drive adjuster |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6023201U (en) | 1985-02-18 |
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