JPS61171943A - Automatic tensile device for connector transmitting member in internal-combustion engine - Google Patents
Automatic tensile device for connector transmitting member in internal-combustion engineInfo
- Publication number
- JPS61171943A JPS61171943A JP60013192A JP1319285A JPS61171943A JP S61171943 A JPS61171943 A JP S61171943A JP 60013192 A JP60013192 A JP 60013192A JP 1319285 A JP1319285 A JP 1319285A JP S61171943 A JPS61171943 A JP S61171943A
- Authority
- JP
- Japan
- Prior art keywords
- lock mechanism
- hydraulic lock
- support member
- transmission
- oil reservoir
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/022—Chain drive
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L2001/0537—Double overhead camshafts [DOHC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/08—Endless member is a chain
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/18—DOHC [Double overhead camshaft]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0859—Check valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、機関本体に支持されるクランク軸および動弁
カム軸間を巻掛伝動部材を介して連結した内燃機関にお
いて、巻掛伝動部材を常に緊張状態に保持する自動緊張
装置に関する。Detailed Description of the Invention "Field of Industrial Application" The present invention relates to an internal combustion engine in which a crankshaft supported by an engine body and a valve drive camshaft are connected via a wrapped transmission member. This invention relates to an automatic tensioning device that constantly maintains tension.
「従来の技術およびその問題点」
この種自動緊張装置では、カムチェーン等巻掛伝動部材
の外周に摺接するテンショナスリッパを、同伝動部材の
内方へ付勢するとともに、テンショナスリッパの同方向
への移動を許容し、かつその逆方向の移動のみを規制す
る手段に、油圧ロック機構を利用するものがある。"Prior art and its problems" In this type of automatic tensioning device, a tensioner slipper that slides on the outer periphery of a winding transmission member such as a cam chain is biased inwardly of the transmission member, and the tensioner slipper is biased in the same direction. There is a method that utilizes a hydraulic lock mechanism as a means for allowing movement of the object and restricting only movement in the opposite direction.
このように油圧ロック機構を利用するものの場合、通常
、油圧ロック機構にオイルを補給するため、油溜室を必
要とするが、例えば特願昭５８−８１１８２号に記載さ
れたものでは、部品点数の削減並びに占有スペースの狭
小化を図るため、油溜室を、鋳造によりつくられる油圧
ロック機構支持部材に一体的に設け、この支持部材を上
下の被固定部で機関本体側に固定する構造とされている
。In the case of a device that uses a hydraulic lock mechanism in this way, an oil reservoir chamber is usually required to supply oil to the hydraulic lock mechanism, but for example, in the device described in Japanese Patent Application No. 58-81182, the number of parts is In order to reduce the amount of noise and the space occupied, the oil sump chamber is provided integrally with the hydraulic lock mechanism support member made by casting, and this support member is fixed to the engine body using the upper and lower fixed parts. has been done.
ところが、このような構造の油溜室では、鋳造によって
つくられるがために、壁部がある程度厚くなっており、
上部開口面積を広く採り難く、たとえ上部開口面積を広
くしようとして、カムチェーン室にあわせて細長い形状
にしたとしても、所望する開口面積を得ることは難しく
、このため油圧ロック機構へのオイル補給がうまく行な
われなくなるおそれがあり、ひいては油圧ロック機構の
円滑な作動が望めなくなるという不都合があった。However, because the oil storage chamber with this type of structure is made by casting, the walls are somewhat thick.
It is difficult to obtain a wide upper opening area, and even if you try to widen the upper opening area by making it elongated to fit the cam chain chamber, it is difficult to obtain the desired opening area, which makes it difficult to supply oil to the hydraulic lock mechanism. There is a risk that the locking mechanism will not operate properly, and as a result, the hydraulic locking mechanism cannot be expected to operate smoothly.
また前記支持部材を、板金を加工したものでつ°′°“
＜＄Ｌ ；ｆＬ４”°゛°°ゝ０゛″： ｉ ＊ ｔｇ
ｘ 、。Further, the supporting member is made of processed sheet metal.
<$L ; fL4”°゛°°ゝ0゛″: i * tg
x.
部によって機関本体側に固定する際に、リベット等固定
手段の締付力によって油溜室が変形し、これにともない
下方被固定部近傍にある油圧ロック機構もその影響を受
けるため、同油圧ロック機構の円滑な作動が望めなくな
るおそれが生じる。When the oil reservoir is fixed to the engine body side by the part, the oil reservoir chamber is deformed by the tightening force of the fixing means such as rivets, and the hydraulic lock mechanism near the lower part to be fixed is also affected by this, so the hydraulic lock There is a possibility that the mechanism will not operate smoothly.
本発明は上記事情に鑑みてなされたもので、油圧ロック
機構の円滑な作動が望め、信頼性の向上が図れる内燃機
関における巻掛伝動部材自動緊張装置を提供することを
目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an automatic tensioning device for a wrapped transmission member in an internal combustion engine, which enables smooth operation of a hydraulic lock mechanism and improves reliability.
「問題点を解決するための手段」
上記目的を達成するために、本願第１発明では、油圧ロ
ック機構支持部材を、上部が開口された油溜室を有し、
かつ底部に前記油圧ロック機構のシリンダ外周部の段部
を嵌合保持する穴を有し、さらに該油溜室を画成する壁
部の上部が機関本体側に固定される構成とし、また本願
第２発明では、上記構成に加え、油圧ロック機構支持部
材を、機関本体側に固定される部材と同支持部材を保持
する部材とからなるテンショナハンガを介して、機関本
体に交換自在に固定する構成とした。"Means for Solving the Problem" In order to achieve the above object, the first invention of the present application provides a hydraulic locking mechanism support member having an oil reservoir chamber with an open upper part,
The bottom part has a hole for fitting and holding the stepped part of the cylinder outer periphery of the hydraulic lock mechanism, and furthermore, the upper part of the wall defining the oil reservoir chamber is fixed to the engine main body side, and the present application In the second invention, in addition to the above configuration, the hydraulic locking mechanism support member is exchangeably fixed to the engine body via a tensioner hanger consisting of a member fixed to the engine body side and a member holding the support member. The structure is as follows.
「作用 」
本願第１発明によれば、支持部材は底部で油圧ロック機
構を嵌合保持するとともに、壁部上部で撞開＋ｌ＋訓Ｉ
＋閘つ↓−プ↓−俵 砺Δ１−レープｈ／られる場合で
あっても、リベット等固定手段の締付力による変形が、
油圧ロック機構にまで影響をおよぼすことがない。この
結果、油溜室の上部開口面積を広く採ると同時に、油圧
ロック機構を変形させることなく保持することができ、
油圧ロック機構の円滑な作動が確保される。"Function" According to the first invention of the present application, the support member fits and holds the hydraulic lock mechanism at the bottom, and at the top of the wall, the support member engages and holds the hydraulic lock mechanism.
+ Deformation due to the tightening force of fixing means such as rivets,
It does not affect the hydraulic lock mechanism. As a result, the upper opening area of the oil reservoir chamber can be widened, and at the same time, the hydraulic lock mechanism can be held without deforming.
Smooth operation of the hydraulic locking mechanism is ensured.
また、本願第２発明によれば、上記作用に加え、本装置
を異なる種類の内燃機関に取り付ける場合、テンショナ
ハンガの機関本体側に固定される部材のみを変えるだけ
で、他の部材を共通部材として使用することができる。Further, according to the second invention of the present application, in addition to the above-described effects, when the present device is installed in a different type of internal combustion engine, only the member fixed to the engine body side of the tensioner hanger is changed, and the other members are replaced with the common member. It can be used as
「実施例」 以下、本発明の一実施例を図面を参照して説明する。"Example" Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図は本発明が適用された４サイクル内燃機関の要部
を示すもので、機関本体１にはクランク軸２および動弁
カム軸３が支承されている。モして両軸２．３には軸と
直交する方向に延在する動弁伝動室４においてスプロケ
ット５．６がそれぞれ固定されており、これらスプロケ
ット５．６にはカムチェーン（無端状巻掛伝動部材）７
が巻掛かられている。カムチェーン７は第１図において
右側が張り側７ａ、左側が暖み側７ｂとなっており、張
り側７ａの外側には、カムチェーン７の外側面に摺接す
るチェーンガイド８が配設されている。FIG. 1 shows the main parts of a four-stroke internal combustion engine to which the present invention is applied, in which an engine body 1 supports a crankshaft 2 and a valve drive camshaft 3. Sprockets 5.6 are respectively fixed to both shafts 2.3 in valve transmission chambers 4 extending perpendicularly to the shafts, and these sprockets 5.6 are fitted with cam chains (endless windings). Transmission member) 7
is wrapped around. The cam chain 7 has a tension side 7a on the right side and a warm side 7b on the left side in FIG. There is.
チェーンガイド８は中間部を機関本体ｌにねじ止めされ
るとともに、下端部を弾性部材を介して機関本体ｌの支
持部分９に支承されている。また、カムチェーン７の緩
み側７ｂには、カムチェーン７を常に緊張状態に保つ自
動緊張装置Ｔが設けられている。The chain guide 8 has an intermediate portion screwed to the engine body 1, and a lower end supported by a support portion 9 of the engine body 1 via an elastic member. Furthermore, an automatic tensioning device T is provided on the slack side 7b of the cam chain 7 to keep the cam chain 7 in a tensioned state at all times.
この緊張装置Ｔの構造について説明すると、前記カムチ
ェーン７の緩み側７ｂの外側にはテンショナスリッパ１
０がカムチェーン７が存する平面内に揺動自在かつカム
チェーン７に摺接するように配設されている。そして、
このテンショナスリッパ１０の一端側および他端側には
、突出部１０ａ、 １０ｂがそれぞれカムチェーン７を
両側から挟むようにカムチェーン７の内側まで延びて設
けられている１２は、機関本体ｌにボルト１１を介して
着脱自在に取り付けられたテンショナハンガ１２であり
、このテンショナハンガ１２は、機関本体ｌにボルト止
めされるトップブリッジ１３（第３図参照）と、その下
部にリベット止めされたサイドプレート１４とがら構成
され、それらは、カムチェーン７の内側に配置されてい
る。トップブリッジ１３の下部中央には、カムチェーン
７から垂れてくるオイル飛沫を、後述する油圧ロック機
構Ｒの真上まで導く油通路１５が形成されている。To explain the structure of this tensioning device T, a tensioner slipper 1 is provided on the outside of the slack side 7b of the cam chain 7.
0 is disposed so as to be able to swing freely within the plane in which the cam chain 7 exists and to be in sliding contact with the cam chain 7. and,
Projections 10a and 10b are provided at one end and the other end of the tensioner slipper 10, respectively, extending to the inside of the cam chain 7 so as to sandwich the cam chain 7 from both sides. A tensioner hanger 12 is removably attached via a top bridge 11, and this tensioner hanger 12 is attached to a top bridge 13 (see Fig. 3) bolted to the engine body l, and a side plate riveted to the lower part of the top bridge 13 (see Fig. 3). 14, which are arranged inside the cam chain 7. An oil passage 15 is formed in the center of the lower part of the top bridge 13 to guide oil droplets dripping from the cam chain 7 to just above a hydraulic lock mechanism R to be described later.
前記サイドプレート１４の第１図中上部左側にはアーム
１６の一端がリベット１７を介して回動自在に連結され
ており、アーム１６の他端はピン１８を介して前記テン
ショナスリッパｌＯの一端側突出部１０ａに回動自在に
連結されている。ここで、テンショナスリツバ１０のピ
ン１８に支持される箇所はテンショナスリッパＩＯの揺
動支点となっている。また、サイＦ、ｊい−８１４゜１
□や□□Ｉ ＋、： ｉｔ ＜ ）Ｉｉ ９ 隻
ランク（可動腕）１９が、リベット２０を介して前記テ
ンショナスツバ１０の揺動方向と同方向に回動するよう
に取り付けられている。ベルクランク１９は、下方に延
びてその端部が前記テンショナスリッパ１０の他端側突
出部ｔａｂにピン２１を介して回動自在に連結される垂
直腕１９ａと、第１図中右側水平方向に延びてその端部
がロック機構Ｒに係合される水平腕＋９ｂとから構成さ
れている。また、このベルクランク１９もカムチェーン
７の内側に配置されている。One end of an arm 16 is rotatably connected to the upper left side of the side plate 14 in FIG. 1 via a rivet 17, and the other end of the arm 16 is connected via a pin 18 to one end of the tensioner slipper lO It is rotatably connected to the protrusion 10a. Here, the portion of the tensioner sliver 10 supported by the pin 18 serves as a swinging fulcrum for the tensioner slipper IO. Also, Sai F, j-814゜1
□, □□I +, : it < ) Ii 9 A ship rank (movable arm) 19 is attached via a rivet 20 so as to rotate in the same direction as the swinging direction of the tensioner collar 10. The bell crank 19 includes a vertical arm 19a which extends downward and whose end is rotatably connected to the other end side protrusion tab of the tensioner slipper 10 via a pin 21, and a vertical arm 19a which extends downward and is rotatably connected to the other end protrusion tab of the tensioner slipper 10 in the horizontal direction on the right side in FIG. It consists of an extending horizontal arm +9b whose end is engaged with the locking mechanism R. Further, this bell crank 19 is also arranged inside the cam chain 7.
前記サイドプレート１４の下部には油圧ロック機構Ｒを
支持する支持部材２２がリベット２３を介して固定され
ている。該支持部材２２は、板金を加工することにより
つくられる中空構造のもので、上部に長方形状に拡径す
る開口を有するとともに、底部に円状に縮径する穴２２
ａを有しており、支持部材２２の底部穴２２ａには油圧
ロック機構Ｒが、同支持部材２２を貫通するようにかつ
両リベット２３の間に位置して嵌装されている（第４図
参照）。また、この支持部材は、上部開口の長手方向が
動弁伝動室４の長手方向すなわちカムチェーン７の存す
る方向に沿うように配置され、かつ内部に画成される空
間は油溜室２４として機能する。そして、支持部材２２
は、油溜室２４を画成する左右両壁部の上部が、間にカ
ラー２５をはさんだ状態で前記リベット２３に挿通され
ることにより、前記サイドプレート１４に支持されてい
る。また支持部材２２および油圧ロック機構Ｒは、前記
テンションハンガ１２、ベルクランク１９と同様カムチ
ェーン７の内側に配置されている。A support member 22 for supporting the hydraulic lock mechanism R is fixed to the lower part of the side plate 14 via a rivet 23. The support member 22 has a hollow structure made by processing sheet metal, and has an opening with a rectangular shape increasing in diameter at the top and a hole 22 having a circular diameter decreasing in the bottom.
a, and a hydraulic locking mechanism R is fitted into the bottom hole 22a of the support member 22 so as to pass through the support member 22 and positioned between both rivets 23 (Fig. 4). reference). Further, this support member is arranged such that the longitudinal direction of the upper opening is along the longitudinal direction of the valve transmission chamber 4, that is, the direction in which the cam chain 7 exists, and the space defined inside functions as an oil reservoir chamber 24. do. And the support member 22
is supported by the side plate 14 by inserting the upper portions of the left and right walls defining the oil reservoir chamber 24 into the rivet 23 with a collar 25 sandwiched therebetween. Further, the support member 22 and the hydraulic lock mechanism R are arranged inside the cam chain 7, like the tension hanger 12 and the bell crank 19.
油圧ロック機構Ｒは、特公昭５８−８１１７８号に記載
されているものと略同様の構成であり、これについて説
明すると、外周に設けられた段部３１ａが前記支持部材
２２に嵌合保持されるシリンダ３１には、プランジャ３
２が摺動自在に嵌装され、プランジャ３２の上端には前
記ベルクランク１９の水平腕１９ｂ先端を下方から押圧
するプラグ３３がピン嵌合されている。そして、このプ
ラグ３３はプランジャ３２と一体的にスプリング３４に
よって上方へ付勢されている。前記プランジャ３２はシ
リンダ３１との間に油圧室３５を画成し、またプランジ
ャ３２の内部には補給油室３６が画成されている。補給
油室３６は、プランジャ３２およびシリンダ３１を貫通
する油路３７を介して支持部材２２の内部油溜室２４に
連通し、またプランジャ３２の上部貫通孔を介して大気
と連通し、さらにプランジャ３２の底部を貫通する弁孔
を介して油圧室３５に連通している。また。前記油圧室
３５にはプランジャ３２の弁孔を開閉操作する一方向弁
３８がバルブケージ３９に保持されて配設されている。The hydraulic lock mechanism R has approximately the same configuration as that described in Japanese Patent Publication No. 58-81178, and to explain this, a stepped portion 31a provided on the outer periphery is fitted and held by the support member 22. The cylinder 31 has a plunger 3
2 is slidably fitted in the plunger 32, and a plug 33 that presses the tip of the horizontal arm 19b of the bell crank 19 from below is pin-fitted to the upper end of the plunger 32. The plug 33 is integrally urged upward with the plunger 32 by a spring 34. A hydraulic chamber 35 is defined between the plunger 32 and the cylinder 31, and a replenishment oil chamber 36 is defined inside the plunger 32. The replenishment oil chamber 36 communicates with the internal oil reservoir chamber 24 of the support member 22 via an oil passage 37 passing through the plunger 32 and the cylinder 31, and communicates with the atmosphere via an upper through hole of the plunger 32. It communicates with the hydraulic chamber 35 via a valve hole penetrating the bottom of the hydraulic chamber 32 . Also. A one-way valve 38 for opening and closing a valve hole of the plunger 32 is disposed in the hydraulic chamber 35 and is held by a valve cage 39 .
ここで、油圧ロック機構Ｒを支持する前記支持部材２２
には、シリンダ３１に形成された油路３７よりも下方に
、鉄粉、スケール等のゴミを油溜室２４から排出させる
ための孔４０が設けられている。Here, the support member 22 that supports the hydraulic lock mechanism R
A hole 40 is provided below the oil passage 37 formed in the cylinder 31 for discharging dust such as iron powder and scale from the oil reservoir chamber 24.
次に、この実施例の作用を説明する。Next, the operation of this embodiment will be explained.
油圧ロック機構Ｒ支持部材２２の内部油溜室２４並びに
油圧ロック機構Ｒの補給油室３６、油圧室３５にはカム
チェーン７の潤滑油と同じ油が予め注入されるが、特に
油溜室２４には、機関の運転中にカムチェーン７を潤滑
し終えた潤滑油の一部がトップブリッジ１３の油通路１
５に導かれた後、そこから落下して貯留される。The same oil as the lubricating oil for the cam chain 7 is injected in advance into the internal oil reservoir chamber 24 of the hydraulic lock mechanism R support member 22, the replenishment oil chamber 36, and the hydraulic chamber 35 of the hydraulic lock mechanism R. During engine operation, some of the lubricating oil that has finished lubricating the cam chain 7 flows into the oil passage 1 of the top bridge 13.
After being led to 5, it falls from there and is stored.
油圧ロック機構Ｒはスプリング３４の弾発力によってプ
ラグ３３を押し上げてベルクランク１９をピン２０の回
りに第１図中時計方向に回動するよう付勢し、テンショ
ナスリッパｌＯを介してカムチェ−ン７の緩み側７ｂを
内方に押圧付勢し、これによってカムチェーン７に常時
一定の緊張力を与える。The hydraulic lock mechanism R pushes up the plug 33 by the elastic force of the spring 34, urges the bell crank 19 to rotate clockwise in FIG. The loose side 7b of the cam chain 7 is pressed inward, thereby always applying a constant tension force to the cam chain 7.
いま、カムチェーン７が伸びて緩むと、第１図中２点鎖
線で示す如く、テンショナスリッパｌＯがカムチェーン
７の内方へ移動し、その緩みを吸収する。その際、プラ
ンジャ３２が上動して油圧室３５が減圧し、これと同時
に補給油室３６との圧力差により一方向弁３８がプラン
ジャ３２底部の弁孔を開き、補給油室３６から弁孔を通
して油圧室３５に油が補給される。Now, when the cam chain 7 stretches and loosens, the tensioner slipper lO moves inward of the cam chain 7 to absorb the slack, as shown by the two-dot chain line in FIG. At that time, the plunger 32 moves upward and the pressure in the hydraulic chamber 35 is reduced, and at the same time, the one-way valve 38 opens the valve hole at the bottom of the plunger 32 due to the pressure difference with the replenishment oil chamber 36, and the valve hole is opened from the replenishment oil chamber 36. Oil is supplied to the hydraulic chamber 35 through the passage.
そして、一旦油圧室３５に所要量の油が補給されると、
一方向弁３８の作用によりプランジャ３２をその位置に
保持することができ、トルク変動によりカムチェーン７
の緩み側７ｂに引張力が作用する場合でも、その引張力
に対抗してベルクランク１９Ｉを介してテンショナスリ
ッパＩＯのカムチェーン７外方への移動を阻止すること
ができる。Once the required amount of oil is supplied to the hydraulic chamber 35,
The plunger 32 can be held in that position by the action of the one-way valve 38, and the cam chain 7
Even if a tensile force acts on the slack side 7b of the tensioner slipper IO, the tensioner slipper IO can be prevented from moving outward from the cam chain 7 via the bell crank 19I against the tensile force.
ここで、前記油圧ロック機構支持部材２２は、板金によ
りつくられているため、壁部肉厚を薄く採ることができ
、その分向支持部材２２に一体に設けた油溜室２４の上
部開口面積を広く採ることができる。しかも油溜室２４
は動弁伝動室４の長手方向に沿って細長い形状に形成さ
れているため、他の部材と干渉することなく開口面積を
広く採ることができる。Here, since the hydraulic lock mechanism support member 22 is made of sheet metal, the wall thickness can be made thin, and the upper opening area of the oil reservoir chamber 24 provided integrally with the support member 22. can be widely adopted. Moreover, oil sump chamber 24
Since it is formed in an elongated shape along the longitudinal direction of the valve transmission chamber 4, a wide opening area can be taken without interfering with other members.
また、支持部材２２をテンショナハンガ１２に取り付け
る際、壁部上部はリベット２３の締付力により若干変形
されるが、この変形は油圧ロック機構Ｒを保持する底部
穴２２ａにまでおよぶことがない。Further, when attaching the support member 22 to the tensioner hanger 12, the upper part of the wall portion is slightly deformed by the tightening force of the rivet 23, but this deformation does not reach the bottom hole 22a that holds the hydraulic lock mechanism R.
このため、油圧ロック機構Ｒの円滑な作動は損なわれな
い。Therefore, the smooth operation of the hydraulic lock mechanism R is not impaired.
加えて、支持部材２２を、機関本体に固定される側の部
材であるトップブリッジ１３と油圧ロック機構支持部材
２２を保持する側の部材であるサイドプレート１４との
２部材からなるテンションハンガ１２によって支持して
いるため、本装置を異なる種類の内燃機関に取り付ける
場合、テンショナハンガ＋’）／７’ｌ應明十漬油目−
田常士釦ス纂愈オ十むｈ狐トップブリッジ１３のみを変
えればよく、他の部材は共通部材として使用することが
できる。In addition, the support member 22 is supported by a tension hanger 12 that is made up of two members: a top bridge 13 that is a member that is fixed to the engine body, and a side plate 14 that is a member that holds the hydraulic lock mechanism support member 22. When installing this device in a different type of internal combustion engine, the tensioner hanger is
Only the top bridge 13 needs to be changed, and the other members can be used as common members.
なお、本実施例では、テンショナスリッパ１０を作動さ
“せるのに、ベルクランク１９を介して作動させている
が、ベルクランク１９を介することなく油圧ロック機構
Ｒにより直接作動させるようにしてもよい。In this embodiment, the tensioner slipper 10 is actuated via the bell crank 19, but it may be actuated directly by the hydraulic lock mechanism R without using the bell crank 19. .
「発明の効果」
本願第１発明によれば、油圧ロック機構支持部材を、上
部が開口された油室を有し、かつ底部材に油圧ロック機
構を嵌合保持する穴を有し、さらに油溜室を画成する壁
部の上部が機関本体側に固定される構成としたから、同
支持部材を板金によってつくることにより、油溜室の上
部開口面積を広く採ると同時に油圧ロック機構を変形さ
せることなく保持しうる。この結果、油圧ロック機構の
円滑な作動が確保でき、信頼性の向上を図ることができ
る。"Effects of the Invention" According to the first invention of the present application, the hydraulic lock mechanism support member has an oil chamber with an open top, a hole in the bottom member for fitting and holding the hydraulic lock mechanism, and Since the upper part of the wall that defines the oil reservoir is fixed to the engine body side, by making the supporting member from sheet metal, the upper opening area of the oil reservoir can be widened and at the same time the hydraulic lock mechanism can be modified. It can be maintained without causing any damage. As a result, smooth operation of the hydraulic lock mechanism can be ensured, and reliability can be improved.
また、本願第２発明によれば、第１発明の構成に加えて
、油圧ロック機構支持部材を、機関本体側に固定される
部材と支持部材を保持する部材とからなるテンションハ
ンガを介して、機関本体に交換自在に固定する構成とし
たから、本装置を異なる種類の内燃機関に取り付ける場
合、テンションハンガの機関本体側に固定される部材の
みを変えるだけで、他の部材を共通部材として使用する
ことができ、量産するに際し、大幅なコストダウンが図
れる等の効果を奏する。Further, according to the second invention of the present application, in addition to the configuration of the first invention, the hydraulic lock mechanism support member is connected to the engine body through a tension hanger consisting of a member fixed to the engine body side and a member holding the support member. Since it is configured to be fixed to the engine body in a replaceable manner, when installing this device to a different type of internal combustion engine, only the member fixed to the engine body side of the tension hanger needs to be changed, and the other members can be used as common parts. This has the effect of significantly reducing costs during mass production.
第１図は本発明に係る内燃機関の要部の横断側面図、第
２図はその一部切欠正面図、第３図はトップブリッジの
斜視図、第４図は第１図の■−■線に沿う断面図である
。
！・・・・・・機関本体、２・・・・・・クランク軸、
３・・・・・・動弁カム軸、４・・・・・・動弁伝動室
、７・・・・・・カムチェーン（巻掛伝動部材）、１０
・・・・・・テンショナスリッパ、１２・・・・・・テ
ンショナハンガ、１３・・・・・・トップブリッジ、１
４・・・・・・サイドプレート、２２・・・・・・ロッ
ク機構支持部材、２２ａ穴、２３・・・・・・リベット
、２４・・・・・・油溜室、Ｔ・・・・・・緊張装置、
Ｒ・・・・・・ロック機構手続ネｍ正書（自発）
圃Fig. 1 is a cross-sectional side view of the main parts of an internal combustion engine according to the present invention, Fig. 2 is a partially cutaway front view thereof, Fig. 3 is a perspective view of the top bridge, and Fig. 4 is a - - - - of Fig. 1. It is a sectional view along a line. ! ... Engine body, 2 ... Crankshaft,
3...Valve drive camshaft, 4...Valve drive transmission chamber, 7...Cam chain (wrapped transmission member), 10
...Tensioner slipper, 12...Tensioner hanger, 13...Top bridge, 1
4... Side plate, 22... Lock mechanism support member, 22a hole, 23... Rivet, 24... Oil reservoir chamber, T...・Tension device,
R・・・・・・Lock mechanism procedure manual (spontaneous) Field
Claims (3)
軸を、これら軸と直交する方向に延在する動弁伝動室に
おいて無端状巻掛伝動部材により連結した内燃機関であ
って、前記巻掛伝動部材の外周に摺接されるテンショナ
スリッパと、該テンショナスリッパを巻掛伝動部材内方
へ付勢するとともにテンショナスリッパの同内方への移
動を許容し、かつその逆方向の移動を規制する油圧ロッ
ク機構と、機関本体側に固定されて該油圧ロック機構を
支持する油圧ロック機構支持部材とを備えてなり、前記
支持部材は、上部が開口された油溜室を有し、かつ底部
に前記油圧ロック機構のシリンダ外周部の段部を嵌合保
持する穴を有し、更に該油溜室を画成する壁部の上部が
機関本体側に固定される構成であることを特徴とする内
燃機関における巻掛伝動部材自動緊張装置。(1) An internal combustion engine in which a crankshaft and a valve drive camshaft supported by an engine body are connected by an endless wrapped transmission member in a valve transmission chamber extending in a direction perpendicular to these axes, wherein the A tensioner slipper that slides on the outer periphery of the hanging transmission member, and urges the tensioner slipper inward to the hanging transmission member, allows the tensioner slipper to move inward, and restricts movement in the opposite direction. and a hydraulic lock mechanism support member that is fixed to the engine body side and supports the hydraulic lock mechanism, and the support member has an oil reservoir chamber that is open at the top and has an oil reservoir chamber that is open at the bottom. has a hole into which a stepped portion of the cylinder outer circumference of the hydraulic lock mechanism is fitted and held, and the upper part of the wall defining the oil reservoir chamber is fixed to the engine main body side. automatic tensioning device for wrapped transmission members in internal combustion engines.
弁伝動室の偏平方向に沿って細長に形成されていること
を特徴とする特許請求の範囲第１項記載の内燃機関にお
ける巻掛伝動部材自動緊張装置。(2) The oil reservoir chamber of the hydraulic lock mechanism support member is formed to be elongated along the flat direction of the valve transmission chamber. Automatic tensioning device for hanging transmission members.
軸を、これら軸と直交する方向に延在する動弁伝動室に
おいて無端状巻掛伝動部材により連結した内燃機関であ
って、前記巻掛伝動部材の外周に摺接されるテンショナ
スリッパと、該テンショナスリッパを巻掛伝動部材内方
へ付勢するとともにテンショナスリッパの同内方への移
動を許容し、かつその逆方向の移動を規制する油圧ロッ
ク機構と、機関本体側に固定されて該油圧ロック機構を
支持する支持部材とを備え、前記支持部材は、上部が開
口された油溜室を有し、かつ底部に前記油圧ロック機構
のシリンダ外周部の段部を嵌合保持する穴を有し、さら
に該油溜室を画成する壁部の上部が機関本体側に固定さ
れる構成とされ、該油圧ロック機構支持部材は、機関本
体側に固定される部材と同油圧ロック機構支持部材を保
持する部材とからなるテンショナハンガを介して、機関
本体側に交換自在に固定されていることを特徴とする内
燃機関における巻掛伝動部材自動緊張装置。(3) An internal combustion engine in which a crankshaft and a valve drive camshaft supported by an engine body are connected by an endless wrapped transmission member in a valve transmission chamber extending in a direction perpendicular to these axes, wherein the A tensioner slipper that slides on the outer periphery of the hanging transmission member, and urges the tensioner slipper inward to the hanging transmission member, allows the tensioner slipper to move inward, and restricts movement in the opposite direction. a hydraulic lock mechanism, and a support member fixed to the engine body side to support the hydraulic lock mechanism, the support member having an oil reservoir chamber opened at the top, and having the hydraulic lock mechanism at the bottom. The hydraulic locking mechanism support member has a hole that fits and holds a stepped portion on the outer circumference of the cylinder, and is configured such that the upper part of the wall defining the oil reservoir chamber is fixed to the engine main body side. A wrap transmission in an internal combustion engine, characterized in that the transmission is replaceably fixed to the engine body through a tensioner hanger, which is made up of a member fixed to the engine body and a member holding the hydraulic lock mechanism support member. Automatic member tensioning device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60013192A JPS61171943A (en) | 1985-01-26 | 1985-01-26 | Automatic tensile device for connector transmitting member in internal-combustion engine |
| US06/821,166 US4741299A (en) | 1985-01-26 | 1986-01-21 | Internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60013192A JPS61171943A (en) | 1985-01-26 | 1985-01-26 | Automatic tensile device for connector transmitting member in internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61171943A true JPS61171943A (en) | 1986-08-02 |
Family
ID=11826294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60013192A Pending JPS61171943A (en) | 1985-01-26 | 1985-01-26 | Automatic tensile device for connector transmitting member in internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61171943A (en) |
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|---|---|---|---|---|
| US10130810B2 (en) | 2013-03-29 | 2018-11-20 | Neurometrix, Inc. | Transcutaneous electrical nerve stimulator with user gesture detector and electrode-skin contact detector, with transient motion detector for increasing the accuracy of the same |
| US10159835B2 (en) | 2013-03-29 | 2018-12-25 | Neurometrix, Inc. | Detecting cutaneous electrode peeling using electrode-skin impedance |
| USD837394S1 (en) | 2017-07-11 | 2019-01-01 | Neurometrix, Inc. | Transcutaneous electrical nerve stimulation (TENS) device |
| US10279179B2 (en) | 2013-04-15 | 2019-05-07 | Neurometrix, Inc. | Transcutaneous electrical nerve stimulator with automatic detection of user sleep-wake state |
| US10293159B2 (en) | 2011-11-15 | 2019-05-21 | Neurometrix, Inc. | Measuring the “on-skin” time of a transcutaneous electrical nerve stimulator (TENS) device in order to minimize skin irritation due to excessive uninterrupted wearing of the same |
| US10335595B2 (en) | 2011-11-15 | 2019-07-02 | Neurometrix, Inc. | Dynamic control of transcutaneous electrical nerve stimulation therapy using continuous sleep detection |
| US10384063B2 (en) | 2014-04-15 | 2019-08-20 | Neurometrix, Inc. | Apparatus and method for automated compensation of transcutaneous electrical nerve stimulation for temporal fluctuations such as circadian rhythms |
| USD861903S1 (en) | 2018-05-15 | 2019-10-01 | Neurometrix, Inc. | Apparatus for transcutaneous electrical nerve stimulation |
| USD865986S1 (en) | 2017-09-21 | 2019-11-05 | Neurometrix, Inc. | Transcutaneous electrical nerve stimulation device strap |
| US10780269B2 (en) | 2011-11-15 | 2020-09-22 | Neurometrix, Inc. | Apparatus and method for relieving pain using transcutaneous electrical nerve stimulation |
| US10864365B2 (en) | 2011-11-15 | 2020-12-15 | Neurometrix, Inc. | Transcutaneous electrical nerve stimulation using novel unbalanced biphasic waveform and novel electrode arrangement |
| US10940311B2 (en) | 2013-03-29 | 2021-03-09 | Neurometrix, Inc. | Apparatus and method for button-free control of a wearable transcutaneous electrical nerve stimulator using interactive gestures and other means |
| US11058877B2 (en) | 2017-05-30 | 2021-07-13 | Neurometrix, Inc. | Apparatus and method for the automated control of transcutaneous electrical nerve stimulation based on current and forecasted weather conditions |
| US11235142B2 (en) | 2016-12-23 | 2022-02-01 | Neurometrix, Inc. | “Smart” electrode assembly for transcutaneous electrical nerve stimulation (TENS) |
| US11247052B2 (en) | 2013-04-15 | 2022-02-15 | Neurometrix, Inc. | Transcutaneous electrical nerve stimulator with automatic detection of user sleep-wake state |
| US11247040B2 (en) | 2011-11-15 | 2022-02-15 | Neurometrix, Inc. | Dynamic control of transcutaneous electrical nerve stimulation therapy using continuous sleep detection |
| US11259744B2 (en) | 2011-11-15 | 2022-03-01 | Neurometrix, Inc. | Transcutaneous electrical nerve stimulator with automatic detection of leg orientation and leg motion for enhanced sleep analysis, including enhanced transcutaneous electrical nerve stimulation (TENS) using the same |
| US11883661B2 (en) | 2018-12-07 | 2024-01-30 | Neurometrix, Inc. | Intelligent determination of therapeutic stimulation intensity for transcutaneous electrical nerve stimulation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS469517Y1 (en) * | 1968-01-31 | 1971-04-03 |
-
1985
- 1985-01-26 JP JP60013192A patent/JPS61171943A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS469517Y1 (en) * | 1968-01-31 | 1971-04-03 |
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|---|---|---|---|---|
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| US11717682B2 (en) | 2011-11-15 | 2023-08-08 | Neurometrix, Inc | Apparatus and method for relieving pain using transcutaneous electrical nerve stimulation |
| US11247040B2 (en) | 2011-11-15 | 2022-02-15 | Neurometrix, Inc. | Dynamic control of transcutaneous electrical nerve stimulation therapy using continuous sleep detection |
| US11259744B2 (en) | 2011-11-15 | 2022-03-01 | Neurometrix, Inc. | Transcutaneous electrical nerve stimulator with automatic detection of leg orientation and leg motion for enhanced sleep analysis, including enhanced transcutaneous electrical nerve stimulation (TENS) using the same |
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