200912123 九、發明說明： 【發明所屬之技術領域】 本發明係關於-種引擎，且更特定言之，係關於—種用 於確定閥驅動機構之搖臂之位置的結構。 【先前技術】 用於確定閥驅動機構之搖臂之位置的結構係已知的，諸 如JP-A-2006-348820中所描述之結構。在此文獻中，搖臂 由設置於汽缸頭中之搖臂軸可搖動地支撐。另外，搖臂之 位置係藉由安裝於搖臂軸上之彈簧之彈性力來確定。= 外，抵抗彈簧之彈性力而調節搖臂之移動的移動調 设置於汽缸頭蓋甲。 [專利文獻 1] JP-A-2006-348820 【發明内容】 [本發明將解決之問題] 如亦在】ρ·α_2__3488财所描述的，在用於使 於搖臂轴上之彈菁之彈性力來確定搖臂之位置的結構中裝 引擎#作時的振動等可引起搖臂沿著搖臂㈣動。因此， 執行搖臂之維護工作之簡易性 ^ ^ y J又到負面地影響，因為確 疋搖#之位置之力由於彈簧負載增加而變大。 移：：，上述文獻描述了抵抗彈簧之彈性力而調節搖臂之 :動㈣動調節構件設置於汽缸頭蓋中的結構。在此結構 了在不使彈簧之強度如此大之情況下抑制由引擎摔作 等引起的搖臂之移動，，在此結構中|擎= 見疋位於特定位置中之搖臂與移動調節構件之間存 I33I75.doc 200912123 在微小間隙。因此，引擎操作時的振動等可引起搖臂在搖 孑軸之軸向上振盪。若搖臂振盪，則有可能將由於搖臂撞 擊移動調節構件或其類似物而產生敲擊聲。 本發明提議一種用於確定搖臂之位置之全新結構，該結 構有助於維護。 [用於解決問題之方式] 根據本發明之引擎具有具備閥驅動機構之汽缸頭。該間 驅動機構包括裝配至該汽紅頭之搖臂輛、裝配至該搖臂抽 以便可在軸向上移動之搖臂，及附接至汽紅頭之上部部分 之上部配置構件。上部配置構件具備導引構件，該導引構 件在上部配置構件附接至汽叙頭時與搖臂喃合且 引至搖臂軸上之特定位置。 貪導 附：1 卜、:：引構件可與搖臂唾合’使得在上部配置構件已 位置處之上部部分時將搖臂固持在搖臂軸上之特定 [本發明之優點] 根據該引擎，當汽缸頭蓋 搖臂導引至搖臂軸 位心頭時’導引構件將 時，可改變搖此外’當移除汽缸頭蓋 改變搖#之位置，且因此易於維護。 此外，當使用在上部配置構件已附接 ::導引構件喷合搖臂且將搖臂固持在二: 軸向上之移動，且可抑制異常噪音之 【實施方式】 ° 133175.doc 200912123 在下文中’將參看諸圖式描述根據本發明之實施例之引 擎。注意’在諸圖式中，具有相同功能之結構構件或部分 用相同參考數字來表示，且在此基礎上給出說明。此外， 本發明不限於以下實施例。200912123 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to an engine, and more particularly to a structure for determining the position of a rocker arm of a valve drive mechanism. [Prior Art] A structure for determining the position of the rocker arm of the valve drive mechanism is known, for example, as described in JP-A-2006-348820. In this document, the rocker arm is rockably supported by a rocker shaft disposed in the cylinder head. In addition, the position of the rocker arm is determined by the spring force of the spring mounted on the rocker shaft. = In addition, the movement adjustment of the movement of the rocker arm against the spring force of the spring is set on the cylinder head cover. [Patent Document 1] JP-A-2006-348820 [Disclosure] [Problems to be Solved by the Invention] As described in ρ·α_2__3488, the elasticity of the elastic body used on the axis of the rocker arm The force to determine the position of the rocker arm in the engine # when the vibration or the like can cause the rocker arm to move along the rocker arm (four). Therefore, the ease of performing the maintenance work of the rocker arm ^ ^ y J is negatively affected because the force of the position of the shaker # becomes larger due to the increase in the spring load. Shift::, the above document describes the adjustment of the rocker arm against the elastic force of the spring: the structure of the moving (four) moving adjustment member is disposed in the cylinder head cover. In this configuration, the movement of the rocker arm caused by the engine fall or the like is suppressed without making the strength of the spring so large, and in this structure, the engine and the moving adjustment member are located in a specific position. Intermittent I33I75.doc 200912123 in a small gap. Therefore, vibration or the like during engine operation can cause the rocker arm to oscillate in the axial direction of the rocking shaft. If the rocker arm oscillates, it is possible to generate a knocking sound due to the rocker arm striking the movement regulating member or the like. The present invention proposes a completely new structure for determining the position of the rocker arm that facilitates maintenance. [Method for Solving the Problem] The engine according to the present invention has a cylinder head having a valve drive mechanism. The drive mechanism includes a rocker arm fitted to the steam red head, a rocker arm fitted to the rocker arm for axial movement, and an upper disposition member attached to the upper portion of the steam red head. The upper arranging member is provided with a guiding member that is halved with the rocker arm and guided to a specific position on the rocker shaft when the upper arranging member is attached to the steam head. Greedy Attachment: 1 Bu,:: The lead member can be sprinkled with the rocker arm' to hold the rocker arm on the rocker arm shaft when the upper portion of the upper portion is disposed at the position of the upper arm portion [Advantages of the present invention] According to the engine When the cylinder head rocker arm is guided to the rocker shaft center, the 'guide member will change the position when the cylinder head cover is changed, and thus it is easy to maintain. In addition, when the use of the upper configuration member has been attached: the guiding member sprays the rocker arm and holds the rocker arm in two: axial movement, and can suppress abnormal noise [Embodiment] ° 133175.doc 200912123 In the following 'An engine according to an embodiment of the present invention will be described with reference to the drawings. Note that, in the drawings, structural members or portions having the same functions are denoted by the same reference numerals, and an explanation is given on the basis of the same. Further, the present invention is not limited to the following embodiments.
在此實施例中，如圖2所示，引擎1〇〇包括汽缸頭113， 閥驅動機構400設置於汽缸頭113中。閥驅動機構4〇〇具備 附接至汽缸頭11 3之搖臂軸4 14 ' 41 5、裝配至搖臂軸414、 415以便能夠在軸向上移動之搖臂412、413，及附接至汽 缸頭113之汽缸頭蓋114(上部配置構件）。汽缸頭蓋114具備 導引構件731、732，導引構件731、732在汽缸頭蓋114附 接至汽缸頭113時與搖臂412、413嚙合，且將搖臂412、 413導引至搖臂軸414、415上之特定位置。 在引擎1〇〇中，當汽缸頭蓋114附接至汽缸頭113時，導 引構件731、732將搖臂412、413導引至搖臂軸414、415上 之特定位置"匕外，當移除汽缸頭蓋114時，有可能改變 搖臂412、4"之位置’且因此易於維護。接下來，將詳細 地描述引擎100。 圖1中所展示之速克 擎單元101内。引擎 動臂之傳動箱200。 該實施例之引擎100併入於（例如）如 達摩托車1000(跨坐型車輛）之擺動型弓丨 單元101具備單缸引擎100及亦用作擺 自動傳動裝置， 引擎100傳動至 在此實施例中，傳動箱200容納V形皮帶型 且經由V形皮帶型自動傳動裝置將驅動力自 後輪300。 汽缸體 引擎100(如可自圖2所見）包括曲柄轴箱^ 133175.doc 200912123 ii2、汽缸頭113及汽缸頭蓋114。 曲柄軸箱111與傳動箱200形成為整體單元，且容納曲柄 軸121。活塞123經由連接桿122而連接至曲柄軸ΐ2ι。在此 實施例中，汽缸體112為鑄造組件，單缸124形成於其中。 連接至曲柄軸121之活塞123容納於汽缸124中。汽缸頭113 附接至汽缸124之頭側處之開口。 在此實施例中，如圖2及圖3所示，汽缸頭113在面對汽 缸124之表面中具有凹座125。燃燒室形成於凹座ι25與活 塞123之間。汽缸頭11 3具備向燃燒室開放之一對進氣口 126、127(圖2及圖3中僅展示一進氣口），及向燃燒室開放 之單一排氣口 128。 進氣口 126 (127)及排氣口 128(如圖3所示）包括各別閥座 126a (127a)及 128a、閥導 126b (127b)及 128b。閥座 126a (127a)、128a為用於搁置下文中所描述之進氣閥13ι (132) 及排氣閥133之閥頭部分301 (302)、303之構件。閥導126b (127b)、128b為導引進氣閥131 (132)及排氣閥133之構 件，且藉由下文中所描述之進氣閥131 (132)及排氣閥133 之閥桿311 (312)及313插入穿過其中之插入孔而形成。此 外，彈簧座l26c (me)及128c設置於閥導126b (mb)、 1 28b之外側開口之周邊中。下文中所描述之進氣閥13 1 (132)及排氣閥133之閥彈簧321 (322)、擱置於彈簧座 126c (127c) 、 128c上。 進氣閥131 (132)及排氣閥133分別具備閥頭部分301 (302)及 3 03、閥桿 311 (3 12)及 313、閥彈簧 321 (322)及 133175.doc 200912123 3 23，及閥扣件 33 1 (332)及 333。 閥頭部分301至303為執行如裴配至每一口 126至128之閥 座126a (127a)、128a之閥的功能的構件。閥桿311至SB為 支樓閥頭部分301至303之軸。每一閥13丨至133具有一結 構：閥桿311至313自汽缸頭113之口 126至128中之一特定 者插入閥導126b (127b)、128b中。當閥頭部分3〇1至3〇3裝 配抵靠閥座126a (127a)、128a時，閥桿311至313自閥導 126b (127b)、128b突出於汽缸頭113上方確定距離。閥彈 簧321至323附接至突出至汽缸頭113之外側之閥桿3ιι至 313。閥彈簧32〗至323擱置於設置於汽缸頭113中之彈箬座 126c (127c)、128〇上。此外，閥扣件331至333附接至閥桿 3 11至313之末端部分，其中閥彈簧321至323處於壓縮狀態 中。閥彈簧321至323以壓縮狀態附接於閥扣件331至333與 彈簧座 126c (127c)、128c之間。 藉由閥彈簧321至323之彈性反作用力而將每一閥131至 1 3 3自A缸頭11 3上推。在此狀態中，閥頭部分3 〇 1至3裝 配至每一口 126至128之閥座126a (127a) ' 128a，且每一口 12 6至12 8閉合。若由於任何種類之外力而將閥桿3丨丨至33 向下推，則閥頭部分301至3〇3與每一口 126至128之閥座 126a (127a)、128a分離開’且每一口 126至128打開。此 外’當將閥桿3 11至3 13向下推之外力停止時，閥彈簧3 21 至323之彈性反作用力將閥扣件331至333向上推。因此， 閥頭部分301至303摘置於每一口 126至128之閥座126a (127a)、128a上，且每一口 126至128再次閉合。 133175.doc -10- 200912123 在此實施例中，藉由下文中所描述之搖臂412、4i3將閥 桿311至313向下推。填隙片341 (342)、343附接至閥桿3ΐι 至3 13之尖端部分，且調整每一填隙片341至343之厚度以 便將搖臂41 2、41 3與閥桿3 π至3 13之間的空隙調整至適當 值。 接下來，將說明搖臂。 在此實施例中，搖臂412、413使用滚輪搖臂（搖桿滾 輪），其具備在接觸部分處與凸輪451、452接觸且減小與 凸輪451、452之接觸阻力，藉此改良燃料效率之滚輪476 (486)。 搖臂412、413設置於形成於汽缸頭113中之閥動機構室 600 中。 汽缸頭113(如圖3所示）包括劃分開形成進氣口 126 (127) 及排氣口（128)之部分的底部分割壁61〇。此外，如圖3至圖 5所示，閥動機構室600藉由突出至汽缸體112之相對側的 四個外壁611至614而形成於底部分割壁61〇之外側。閥動 機構室600圍繞孔中心線，孔中心線〇1為汽缸124之中 心線之延長。在此實施例中，藉由支撐壁615將閥動機構 室600劃分成兩個子腔室。支撐壁615設置於彼此面對之第 一外壁611與第二外壁612之間’且自閥動機構室6〇〇之底 部分割壁610突出。支撐壁615之—側與第三外壁613鄰 接。在此實施例中，閥動機構室6〇〇之開口末端由可附接 且可移除之汽缸頭蓋114覆蓋。 如可自圖3及圖4所見，上文所描述之閥131至133中之每 133175.doc 200912123 的閥杯311至313突出至在第一外壁611與支樓壁615之 1的第腔至601中。又，如圖3所示，閥彈簧321至323及 閥扣件331至333安置於第一腔室6〇1中。 圖3中所展示之進氣閥131 (132)及排氣閥133之閥導12化 U27b)、128b在第一腔室6〇1 (其在第一外壁611與支撐壁 615之間，如圖4所示）中打開，且每一閥131至133之閥桿 311、312、313突出至第一腔室6〇1中。 閥動機構至600谷納閥驅動機構4〇〇，閥驅動機構4〇〇驅 動進氣閥131、132及排氣閥133以使其打開及閉合。閥驅 動機構400具備凸輪軸411、用於進氣用途之第一搖臂 用於排氣用途之第二搖臂413、車由向地支撐第一搖臂 412之第一搖臂軸414，及軸向地支撐第二搖臂413之第二 搖臂軸41 5。 凸輪轴411(如圖5所示）經由各別軸承42ι、422而由汽缸 頭113之第一外壁611及支撐壁615支撐。注意，為了使該 圖更易於理解，圖5中省略了搖臂412、413及搖臂軸414、 415。 凸輪轴411經提供以相對於孔中心線〇1成直角延伸。凸 輪軸411(如圖4所示）穿過支撐壁615且突出至在汽缸頭U3 之支樓壁615與第二外壁612之間的第二腔室602中。鏈輪 423附接至該犬出部分。鍵條424懸掛於鍵輪423與曲柄車由 1 21 (參看圊2)之間。鏈條424用以將旋轉驅動力輸入至凸輪 轴411 ’且使凸輪軸411以一旋轉速度旋轉’該旋轉速度與 曲柄軸121之旋轉對齊且為曲柄軸121之速度的—半。 133175.doc -12- 200912123 如可自圖3及圖5所見，凸輪軸411具備進氣凸輪451及排 氣凸輪452。進氣凸輪451及排氣凸輪452設置於在軸向上 遠離凸輪軸411確定距離之位置處以便分別與用於進氣用 途之第一搖臂412及用於排氣用途之第二搖臂413對應。注 意’在此實施例中’供油通道453形成於凸輪軸41丨中，且 將潤滑油供應至進氣凸輪45丨及排氣凸輪452之凸輪表面。 接下來，將說明搖臂412、413。 軸向地支撐第一搖臂412之第一搖臂軸414及軸向地支撐 第二搖臂413之第二搖臂軸41 5(如圖3所示）平行於凸輪軸 411而配置於自凸輪軸411對角移位至上側之位置處。更具 體言之，第一搖臂軸414及第二搖臂軸415(如圖4所示）具有 裝配至設置於閥動機構室6〇〇側的汽缸頭！ 13之第一外壁 611中的軸承構件461、462的一末端，及裝配至穿過支撐 壁61 5之軸承孔463、464之另一末端。 用於進氣用途之第一搖臂412具備圓柱形突起構件471、 滾輪支撐構件472，及一對臂構件473、474。第一搖臂軸 414插入穿過其中之軸承孔475形成於突起構件471中，且 第一搖臂轴414插入軸承孔475中以使得其可在軸向及圓周 方向上滑動。 滾輪支禮構件472在凸輪軸411之向上方向上自突起構件 471之外周邊表面延伸，且可旋轉地支撐滚輪476。滾輪 476(如圖3所示）與凸輪軸411之進氣凸輪451之外周邊表面 (凸輪輪廓）滚動接觸。 另一方面，第一搖臂412之臂構件473、474(如圖4所示） 133175.doc •13- 200912123 自突起構件471之外周邊表面朝著滾輪支撐構件472之相對 側突出。臂構件473、474分成兩個分支，且臂構件473、 474之尖端遠離且面對設置於汽缸頭113中之兩個進氣閥 131 (132)之閥桿311、312的尖端而定位。臂構件473、474 之尖端（如圖3所示）具備擠壓各別進氣閥131、n2之閥桿 3 11 (3 12)之頭部的擠壓部分477、478。 用於排氣用途之弟二搖臂413具備圓柱形突起構件481、 滾輪支撐構件482 ,及臂構件483。第二搖臂軸415插入穿 過其中之軸承孔485形成於突起構件481申，且第二搖臂轴 41 5插入牙過軸承孔4 8 5以使得其可在軸向及圓周方向上滑 動。 滚輪支撐構件482自突起構件48 1之外周邊表面突出，且 可旋轉地支撐滾輪486。滾輪486(如圖3所示）與凸輪軸411 之進氣凸輪451之外周邊表面（凸輪輪廓）滾動接觸。另一方 面，第二搖臂413之臂構件483自突起構件481之外周邊表 面朝著滾輪支撐構件482之相對侧突出。臂構件483之尖端 具備擠壓排氣閥133之閥桿311至313之尖端的擠壓部分 487 ° 在此實施例中，如可自圖3及圖4所見，具有特定厚度之 填隙片341至343附接至閥桿311至313 t之每一者的上部部 分。調整填隙片341至343之厚度以將搖臂412、413與閥桿 3 11至3 1 3之間的空隙調整至適當值。在相對於閥桿3 11至 3 13之頭部之位置移位搖臂412、413的情況下執行此操 作，如圖6及圖7所示。以此方式，自使閥驅動機構4〇〇之 133175.doc • 14· 200912123 «周整及維濩更容易的觀點看，較佳可相對於閥桿311至3 ^ 3 之頭部之位置容易地移位搖臂412、413。此外，自允許閥 驅動機構400正常地起作用之觀點看，採納一結構：確定 搖臂412、413在搖臂軸414、415上之位置在適當位置處， 在该適當位置處，搖臂412、413定位於相對於閥桿311至 31 3之特定位置處。 在此實施例中，第一搖臂412之突起構件471由第一榣臂 軸414支撐以使得其可在軸向上滑動。更具體言之，第一 搖臂412(如圖4所示）在第一搖臂軸414之軸向上在第一位置 與第二位置之間滑動。在第一位置處，臂構件473 (474)之 擠壓構件477 (478)面對閥桿311 (312)之尖端，且在第二位 置處，如圖6所示，臂構件473 (474)之擠壓構件477 (478) 自閥桿3 11 (312)之尖端偏移至側面。 另一方面，第二搖臂413之突起構件481由第二搖臂軸 4 1 5支標以使得其可在軸向上滑動。更具體言之，第二搖 臂413(如圖3所示）在第二搖臂軸415之軸向上在第一位置與 第二位置之間滑動。在第一位置處，臂構件483之擠壓構 件487面對閥桿313之尖端，且在第二位置處’如圖7所 示，臂構件483之擠壓構件487自閥桿313之尖端移位至側 面。 在此實施例中，如圖4所示，在各別第一位置處，第一 搖臂412鄰接設置於閥動機構室6〇〇側處之第一外壁6丨丨中 的軸承構件461 ’且第二搖臂413鄰接支樓臂615。 此外，臂構件473、474、483中之每一者之擠壓構件 133175.doc -15- 200912123 4 7 7、4 7 8、4 8 7的位置經確定以使得其分別面對各別閥桿 311至313之尖端。此時，當朝著該等各別位置之移動發生 時，第一搖臂412及第二搖臂413在軸向上於相對方向上在 各別第一搖臂軸414及第二搖臂軸415上移動。 此外，在此實施例中’墊圈501、502(環形構件）裝配至 搖臂軸414、415中之每一者。墊圈501、502裝配在自第一 位置偏離之側（第二位置側），在第一位置處，各別搖臂 412、413之臂構件473、474、483之擠壓構件477、478、 487面對閥桿311至313之尖端。 在此實施例中，如上所述，在附接閥驅動機構4〇〇之 後，如圖5所示，將板491附接至閥動機構室6〇〇之第一腔 室601之上部部分。如圖4所示，通孔6〇3形成於支撐壁615 及第一外壁611之上側部分中。板491(如圖5所示）藉由將螺 母604旋擰至自通孔603突出之柱螺栓（諸圖中未展示）之末 端而附接。板491(如圖8所示）延伸且固持於汽缸頭113之外 壁611與支撐壁615之間，且提供用於閥動機構室6〇〇之第 一腔室601之頂板部分的加強。又，板491具有開放中心部 分。上文所描述之搖臂412、413及搖臂軸414、415經由開 口 492而曝露。 在此實施例中，汽缸頭蓋Π4亦附接至汽缸頭113之頂板 部分。 &更特定言之，汽缸頭蓋114(如圖3所示）為經附接以覆蓋 汽缸頭113之構件。在此實施例中，i文所描述的汽缸頭 113之閥動機構室600由汽缸頭蓋114覆蓋。汽缸頭蓋 133175.doc -16- 200912123 114(如圖9所示）具有可覆蓋汽缸頭113之閥動機構室6〇〇的 頂板部分之開口的形狀，且螺栓孔701形成於與形成於外 壁611至614及支撐壁615中之螺栓孔6〇5(參看圖4)對應之位 置處。 此外，在此實施例中，汽缸頭蓋114(如圖9所示）包括在 汽缸頭蓋114附接至汽缸頭113之方向上突出的銷7ΐι。孔 712(設置於汽缸頭蓋114中之銷711裝配至該孔中）形成於汽 缸頭113之閥動機構室之外壁的上側部分中，如圖4及圖8 所示。在此實施例中，銷711設置於汽缸頭蓋114中之兩個 位置處，且對應於銷711之孔形成於汽缸頭113中。銷7ιι 及孔712確定汽缸頭蓋丨14附接至汽缸頭丨13時之附接方 向。此外，由於提供銷711及孔712，所以附接汽缸頭蓋 m時之鬆度得以減小，因此減小汽缸頭蓋ιΐ4之附接誤 差。 注意，在此實施例中，銷711設置於汽缸頭蓋ιΐ4中，且 孔712形成於汽缸頭⑴中。然而’以下為足夠的：銷川 設置於該等構件（亦即’汽紅頭蓋114及汽缸頭ιΐ3)中之— 者中’且孔設置於另—構件中。因此，雖然諸圖中未展 7Γ仁該等銷可叹置於汽缸頭(i 3中，且該等孔(設置於汽 缸頭⑴中之該等銷裝配至該等孔中）可形成於汽缸頭蓋 114 中。 此外，在此實施例中，如可自圖3及圖5所見，密封件 m附接至汽缸頭蓋114。更特定言之，如圖9所示，密封 件721裝配至形成於汽缸頭蓋ιΐ4之内侧表面中之凹槽⑵ 133175.doc 200912123 中。凹槽722形成於鄰接汽缸頭113之上側部分之部分中。 岔封件721為具有裝配至凹槽722中之形狀之環形密封件。 Ά缸頭蓋114 (如圖3及圖5所示）附接至汽紅頭11 3之上側部 分’其中密封件721裝配至凹槽722中。密封件721在汽缸 頭113之上側部分之整個圓周周圍提供氣密密封，且抑制 外來物質進入汽缸頭113之閥動機構室6〇〇中。 在此實施例中，搖臂412、413中之每一者藉由設置於汽 缸頭113之上部部分中之汽缸頭蓋丨14而導引至搖臂軸 414、415中之每一者上的特定位置。更特定言之，汽缸頭 蓋114(如圖9所示）具備導引構件731、732。導引構件^、 732在執行附接至汽缸頭113時與搖臂412、413唾合，且將 搖臂412、4Π導引至搖臂軸4丨4、415上之特定位置。 在此實施例中，導引構件731、732(如圖3及圖5所示）為 在汽缸頭蓋11 4附接至汽缸頭11 3之方向上突出的突起。更 特定言之，導引構件731、732分別自汽缸頭蓋114之内側 朝著設置於閥動機構室600中之第一搖臂412及第二搖臂 413所安置之位置突出。 在此實施例中，導引構件731、732(如圖9及圖1〇所示） 包括具有與搖臂軸414、415之外周邊表面對應之圓弧形狀 的凹座733 ' 734。當汽缸頭蓋114附接至汽缸頭113時，如 圖3所示，第一搖臂軸4丨4及第二搖臂軸4is裝配於凹座 733、734中。又，在此實施例中，導引構件731、732朝著 該對平行的搖臂軸414、415之外側延伸。傾斜表面735、 736設置於導引構件73 1、732之尖端處。 133175.doc -18· 200912123 在此實施例中，充當導引構件731、732之突起設置於偏 離搖臂軸414上之特定位置(第一位置)(當汽缸頭蓋ιΐ4附接 至汽缸頭113時’搖臂412、413經導引至該特定位置）之位 置處。此外，傾斜表面735、736之法線朝著第一位置定 向，該等第一位置確定搖臂412、413在搖臂軸414、415上 之位置。 更特疋。之，導引第一搖臂412之第一導引構件731設置 於第一搖臂軸414上，如圖9及圖u所示，在偏離第一位置 (在第一位置處，第一搖臂412之擠壓構件Ο? (478)面對閥 桿311 (3 12)之尖端）朝著第二位置之位置處。第一導引構 件731之傾斜表面735之法線^相對於汽缸頭蓋114附接至 >飞缸頭11 3之方向朝著第一位置定向，該第一位置確定第 一搖臂412在第一搖臂軸414上之位置。 此外’導引第二搖臂413之第二導引構件732設置於第二 搖臂軸415上，如圖9及圖12所示，在偏離第一位置（在第 一位置處，第二搖臂413之擠壓構件487面對閥桿313之尖 端）朝著第二位置之位置處。第二導引構件732之傾斜表面 736之法線h2相對於汽缸頭蓋114附接至汽缸頭113之方向 朝著第一位置定向，該第一位置確定第二搖臂413在第二 搖臂轴415上之位置。 在此實施例中’當汽缸頭蓋114附接至汽缸頭113時，導 引構件731、732之傾斜表面735、736鄰接（參看圖8)裝配至 搖臂軸414、415之墊圈501、502。又，當汽缸頭蓋114附 接至汽缸頭113時’搖臂412、413沿著搖臂軸414、415朝 133175.doc -19- 200912123 。一旦汽缸頭蓋 、732之側表面 著上文所描述的所確定之第一位置移動 Π4附接至汽缸頭113，則導引構件731 、413固持在搖臂 737、738鄰接塾圈501、502，且搖臂412 軸414、415上之第一位置處。 此外’在此實施例中，如圖9所示，汽缸頭蓋ιΐ4具備阻 擋構件74!、742 ’阻擋構件741、％在汽缸頭蓋&附接 至汽缸頭113且墊圈501、5〇2相對於導引構件乃！、在 與搖臂軸414、415上之第—位置之相對側處裝人時阻播塾 圈501、502。在此實施例中’ $引構件73ι、732在搖臂軸 414、415之第一位置之相對側上具備肋狀物741、742，且 肋狀物741、742充當上文所描述之阻擋構件。 當汽缸頭蓋114附接至汽缸頭113時，若墊圈5〇1、5〇2相 對於導引構件731、732在與搖臂軸414、415之第一位置之 相對側處裝入，則肋狀物741、742阻擋墊圈5〇1、5〇2以使 得不可將f气缸頭蓋114附接至汽缸頭113。因& ,可抑制由 於執仃組裝等之工人之疏忽而引起的錯誤，且可較有把握 地準確確定搖臂412、413之位置。 此外，在此實施例中，如圖4所示，該對搖臂軸414、 415平行地配置於汽缸頭113中。此外，搖臂412、413分別 裝配至搖臂軸414、415。又，第一搖臂412及第二搖臂413 經建構以使得當臂構件473、474、483之擠壓構件477、 478、48 7(參看圖3)分別朝著面對閥桿312、312、313之尖 端之特定位置移動時，第一搖臂412及第二搖臂413分別在 第搖’轴414及第二搖臂轴415之軸向上在相對方向上移 133175.doc •20- 200912123 動。 如圖9所示，導引第一搖臂412之導引構件731及導引第 二搖臂413之導引構件732分別設置於汽缸頭蓋114中。當 汽缸頭蓋114附接至汽缸頭113時，導引構件731、732引起 裝配至该對搖臂軸414、415之搖臂412、413在相反方向上 移動。 因此’當汽虹頭蓋114附接至汽缸頭1丨3時，可達成相對 於移動搖臂412、413所必需之力的偏移效應。因此，附接 汽缸頭蓋114所必需之力得以減小。 此外，在此實施例中，導引構件73 1、732(如上所述）朝 著汽缸頭蓋114之内側突出。凹座在形成導引構件73 i、 732之部分處形成於汽缸頭蓋} 14之外側，且因此改良可鍛 性並促進重量減小。 以此方式，汽缸頭蓋114具備導引構件731、732，導弓丨 構件731、732在汽缸頭蓋114附接至汽缸頭113時與搖臂 412、413嚙合，且將搖臂412、413導引至搖臂轴414、415 上之特定位置（第一位置）。 在引擎1〇〇中，當汽缸頭蓋114附接至汽缸頭113時，由 於設有導引構件731、732，所以搖臂412、413經導引至搖 臂軸4丨4、415上之特定位置（第一位置）。此外，當移除汽 缸頭蓋114時，可改變搖臂412、413之位置。 此外’在此實施例中，不使用如Jp_A_2〇〇6_34882〇中所 描述之技術中的將搖臂412、413推動至搖臂軸414、415上 之特疋位置之彈貫。因此，當移除汽缸頭蓋114時，可容 133175.doc -21 · 200912123 易地改變搖臂412、413之位 作。 且可谷易地執行維護工 又在此實施例中，一旦汽缸頭蓋ιΐ4 之上部部分，導引構件73 眩挖辟丨’、徭澤412、413嚙合且 ^臂2、413固持在搖臂軸414、化上之料位置處。 此，即使引擎_動，亦可調節搖臂412、川在搖臂 軸之軸向上之移動，且可抑制異常噪纟之產生。 此外，在此實施例中，搖臂412、413具有—結構：設置 於汽缸頭蓋m中之導引構件731、732鄰接震配至搖臂軸 川、415之墊圈5G1、5G2。墊圈5Qi、5G2内插於設置於汽 缸頭蓋U4中之導引構件731 ' 732與搖臂412、413之間。 因此，導引構件73^732並不與在使用期間強烈搖動之搖 臂412、413直接接觸，且因此可減小汽缸頭蓋ιΐ4中之振 動及磨損之產生。此外，由於將墊圈5〇1、5〇2内插於設置 於汽缸頭蓋114中之導引構件731、732與搖臂412、413之 間，所以當將汽缸頭蓋H4組裝至汽缸頭113時，來自導引 構件、732之作用於塾圈5〇1、5〇2上之力經由塾圈 5〇1、502而作用於搖臂412、413上。因此，因為軸向力作 用於搖漳4 12、413上，所以亦可減小將汽缸頭蓋丨丨4組裝 至汽缸頭113時的阻力。因此，以下為有利的：墊圈5〇1、 5〇2具有所需之強度’且具有使得表面處理允許減小磨損 之表面結構。可將複數個墊圈501、502内插於搖臂412、 41 3與導引構件731、732之間。 此外，在此實施例中，導引構件73 1、732(如圖5及圖9 133175.doc -22- 200912123 所示）具備在汽缸頭蓋114附接至汽缸頭113時導引搖臂 412、413之傾斜表面735、736。設置傾斜表面735、736允 許導引搖臂412、413，且因此因為當將汽缸頭蓋114組裝 至汽缸頭113時可以連續漸進方式導引搖臂412、413，所 以將汽缸頭蓋114組裝至汽缸頭113時之阻力得以減小且 使得組裝操作更容易。In this embodiment, as shown in FIG. 2, the engine 1A includes a cylinder head 113, and the valve drive mechanism 400 is disposed in the cylinder head 113. The valve drive mechanism 4A has a rocker shaft 4 14 ' 41 5 attached to the cylinder head 11 3 , rocker arms 412 , 413 assembled to the rocker shafts 414 , 415 so as to be movable in the axial direction, and attached to the cylinder The cylinder head cover 114 of the head 113 (upper configuration member). The cylinder head cover 114 is provided with guiding members 731, 732 that mesh with the rocker arms 412, 413 when the cylinder head cover 114 is attached to the cylinder head 113, and guide the rocker arms 412, 413 to the rocker shaft 414 , 415 on a specific location. In the engine 1 导引, when the cylinder head cover 114 is attached to the cylinder head 113, the guiding members 731, 732 guide the rocker arms 412, 413 to a specific position on the rocker shafts 414, 415. When the cylinder head cover 114 is removed, it is possible to change the position of the rocker arms 412, 4" and thus it is easy to maintain. Next, the engine 100 will be described in detail. In the engine unit 101 shown in FIG. Engine The gearbox 200 of the boom. The engine 100 of this embodiment is incorporated in, for example, a swing type bow unit 101 such as a motorcycle 1000 (a straddle type vehicle) having a single cylinder engine 100 and also used as a pendulum automatic transmission, the engine 100 being driven thereto. In the embodiment, the transmission case 200 accommodates a V-belt type and drives the driving force from the rear wheel 300 via a V-belt type automatic transmission. The cylinder block engine 100 (as can be seen from Figure 2) includes a crankcase ^ 133175.doc 200912123 ii2, a cylinder head 113 and a cylinder head cover 114. The crankcase 111 and the transmission case 200 are formed as an integral unit and accommodate the crank shaft 121. The piston 123 is coupled to the crankshaft ΐ2ι via a connecting rod 122. In this embodiment, the cylinder block 112 is a cast component in which a single cylinder 124 is formed. A piston 123 connected to the crankshaft 121 is housed in the cylinder 124. The cylinder head 113 is attached to an opening at the head side of the cylinder 124. In this embodiment, as shown in Figs. 2 and 3, the cylinder head 113 has a recess 125 in the surface facing the cylinder 124. The combustion chamber is formed between the recess ι25 and the piston 123. The cylinder head 11 has a pair of intake ports 126, 127 (only one of which is shown in Figs. 2 and 3) open to the combustion chamber, and a single exhaust port 128 that is open to the combustion chamber. Inlet port 126 (127) and exhaust port 128 (shown in Figure 3) include respective valve seats 126a (127a) and 128a, valve guides 126b (127b) and 128b. The valve seat 126a (127a), 128a is a member for resting the valve head portion 301 (302), 303 of the intake valve 13 (132) and the exhaust valve 133 described hereinafter. The valve guides 126b (127b), 128b are members for guiding the intake valve 131 (132) and the exhaust valve 133, and by the intake valve 131 (132) and the valve stem 311 of the exhaust valve 133 described hereinafter. (312) and 313 are formed by inserting an insertion hole therethrough. Further, spring seats l26c (me) and 128c are provided in the periphery of the opening of the outer side of the valve guides 126b (mb), 1 28b. The intake valve 13 1 (132) and the valve spring 321 (322) of the exhaust valve 133 described hereinafter are placed on the spring seats 126c (127c), 128c. The intake valve 131 (132) and the exhaust valve 133 are respectively provided with a valve head portion 301 (302) and 303, a valve stem 311 (3 12) and 313, a valve spring 321 (322), and 133175.doc 200912123 3 23, and Valve fasteners 33 1 (332) and 333. The valve head portions 301 to 303 are members that perform the function of a valve such as a valve seat 126a (127a), 128a fitted to each of the ports 126 to 128. The valve stems 311 to SB are the shafts of the branch valve head portions 301 to 303. Each of the valves 13A to 133 has a structure in which the valve stems 311 to 313 are inserted into the valve guides 126b (127b), 128b from one of the ports 126 to 128 of the cylinder head 113. When the valve head portions 3〇1 to 3〇3 are fitted against the valve seats 126a (127a), 128a, the valve stems 311 to 313 protrude from the valve guides 126b (127b), 128b above the cylinder head 113 to determine the distance. The valve springs 321 to 323 are attached to the valve stems 3 to 313 which protrude to the outer side of the cylinder head 113. The valve springs 32 001 to 323 rest on the magazine seats 126c (127c), 128A provided in the cylinder head 113. Further, the valve fasteners 331 to 333 are attached to the end portions of the valve stems 3 11 to 313 in which the valve springs 321 to 323 are in a compressed state. The valve springs 321 to 323 are attached in a compressed state between the valve fasteners 331 to 333 and the spring seats 126c (127c), 128c. Each of the valves 131 to 13 3 is pushed up from the A cylinder head 11 3 by the elastic reaction force of the valve springs 321 to 323. In this state, the valve head portions 3 〇 1 to 3 are fitted to the valve seats 126a (127a) ' 128a of the respective ports 126 to 128, and each of the ports 12 6 to 12 8 is closed. If the valve stems 3丨丨 to 33 are pushed down due to any kind of external force, the valve head portions 301 to 3〇3 are separated from the valve seats 126a (127a), 128a of each of the ports 126 to 128' and each port 126 Open to 128. Further, when the force is stopped by pushing the valve stems 3 11 to 3 13 downward, the elastic reaction forces of the valve springs 3 21 to 323 push up the valve fasteners 331 to 333. Therefore, the valve head portions 301 to 303 are taken up on the valve seats 126a (127a), 128a of each of the ports 126 to 128, and each of the ports 126 to 128 is closed again. 133175.doc -10- 200912123 In this embodiment, the valve stems 311 to 313 are pushed down by the rocker arms 412, 4i3 described hereinafter. The shim 341 (342), 343 is attached to the tip end portions of the valve stems 3ΐ to 3 13 and the thickness of each shim 341 to 343 is adjusted to connect the rocker arms 41 2, 41 3 with the valve stem 3 π to 3 The gap between 13 is adjusted to an appropriate value. Next, the rocker arm will be explained. In this embodiment, the rocker arms 412, 413 use a roller rocker arm (rocker roller) that is in contact with the cams 451, 452 at the contact portion and reduces the contact resistance with the cams 451, 452, thereby improving fuel efficiency. Roller 476 (486). The rocker arms 412, 413 are disposed in a valve mechanism chamber 600 formed in the cylinder head 113. The cylinder head 113 (shown in Figure 3) includes a bottom dividing wall 61A that divides a portion that forms an inlet 126 (127) and an exhaust port (128). Further, as shown in Figs. 3 to 5, the valve mechanism chamber 600 is formed on the outer side of the bottom partition wall 61〇 by the four outer walls 611 to 614 projecting to the opposite sides of the cylinder block 112. The valve mechanism chamber 600 surrounds the centerline of the bore, and the bore centerline 〇1 is the extension of the centerline of the cylinder 124. In this embodiment, the valve mechanism chamber 600 is divided into two sub-chambers by a support wall 615. The support wall 615 is disposed between the first outer wall 611 and the second outer wall 612 facing each other and protrudes from the bottom partition wall 610 of the valve mechanism chamber 6〇〇. The side of the support wall 615 is adjacent to the third outer wall 613. In this embodiment, the open end of the valve mechanism chamber 6 is covered by an attachable and removable cylinder head cover 114. As can be seen from Figures 3 and 4, the valve cups 311 to 313 of each of the valves 131 to 133 described above are protruded to the first cavity of the first outer wall 611 and the branch wall 615 to 601. Further, as shown in Fig. 3, the valve springs 321 to 323 and the valve fasteners 331 to 333 are disposed in the first chamber 6〇1. The intake valve 131 (132) shown in FIG. 3 and the valve guide 12 (U27b), 128b of the exhaust valve 133 are in the first chamber 〇1 (which is between the first outer wall 611 and the support wall 615, such as Opened in Fig. 4, and the valve stems 311, 312, 313 of each of the valves 131 to 133 protrude into the first chamber 6〇1. The valve mechanism is driven to the 600-nano valve drive mechanism 4, and the valve drive mechanism 4 drives the intake valves 131, 132 and the exhaust valve 133 to open and close. The valve drive mechanism 400 includes a cam shaft 411, a second rocker arm 413 for exhausting the first rocker arm for air intake use, and a first rocker arm shaft 414 for supporting the first rocker arm 412 to the ground, and The second rocker shaft 41 5 of the second rocker arm 413 is axially supported. The cam shaft 411 (shown in Fig. 5) is supported by the first outer wall 611 of the cylinder head 113 and the support wall 615 via respective bearings 42i, 422. Note that in order to make the figure easier to understand, the rocker arms 412, 413 and the rocker shafts 414, 415 are omitted in FIG. Camshaft 411 is provided to extend at right angles to the centerline 〇1 of the bore. A camshaft 411 (shown in Figure 4) passes through the support wall 615 and projects into a second chamber 602 between the wall 615 of the cylinder head U3 and the second outer wall 612. A sprocket 423 is attached to the canine portion. The key strip 424 is suspended between the key wheel 423 and the crank wheel 1 21 (see 圊 2). The chain 424 is for inputting a rotational driving force to the cam shaft 411 ' and rotating the cam shaft 411 at a rotational speed' which is aligned with the rotation of the crank shaft 121 and is a half of the speed of the crank shaft 121. 133175.doc -12- 200912123 As can be seen from Figs. 3 and 5, the cam shaft 411 is provided with an intake cam 451 and an exhaust cam 452. The intake cam 451 and the exhaust cam 452 are disposed at positions spaced apart from the cam shaft 411 in the axial direction so as to correspond to the first rocker arm 412 for air intake use and the second rocker arm 413 for exhaust use, respectively. . Note that the oil supply passage 453 is formed in the cam shaft 41A in this embodiment, and the lubricating oil is supplied to the cam surfaces of the intake cam 45丨 and the exhaust cam 452. Next, the rocker arms 412, 413 will be explained. The first rocker arm shaft 414 axially supporting the first rocker arm 412 and the second rocker arm shaft 41 5 (shown in FIG. 3 ) axially supporting the second rocker arm 413 are disposed in parallel with the cam shaft 411 The cam shaft 411 is angularly displaced to the position of the upper side. More specifically, the first rocker shaft 414 and the second rocker shaft 415 (shown in Figure 4) have a cylinder head that fits to the side of the valve mechanism chamber 6! One end of the bearing members 461, 462 in the first outer wall 611 of 13 is fitted to the other end of the bearing holes 463, 464 passing through the support wall 615. The first rocker arm 412 for air intake use is provided with a cylindrical projecting member 471, a roller support member 472, and a pair of arm members 473, 474. A bearing hole 475 through which the first rocker arm shaft 414 is inserted is formed in the projecting member 471, and the first rocker arm shaft 414 is inserted into the bearing hole 475 so that it can slide in the axial direction and the circumferential direction. The roller support member 472 extends from the outer peripheral surface of the protruding member 471 in the upward direction of the cam shaft 411, and rotatably supports the roller 476. The roller 476 (shown in Fig. 3) is in rolling contact with the outer peripheral surface (cam profile) of the intake cam 451 of the cam shaft 411. On the other hand, the arm members 473, 474 of the first rocker arm 412 (shown in Fig. 4) 133175.doc • 13-200912123 protrude from the outer peripheral surface of the projecting member 471 toward the opposite side of the roller supporting member 472. The arm members 473, 474 are divided into two branches, and the tips of the arm members 473, 474 are positioned away from and facing the tips of the valve stems 311, 312 of the two intake valves 131 (132) provided in the cylinder head 113. The tips of the arm members 473, 474 (shown in Fig. 3) are provided with pressing portions 477, 478 for pressing the heads of the stems 3 11 (3 12) of the respective intake valves 131, n2. The second rocker arm 413 for exhausting use has a cylindrical projecting member 481, a roller support member 482, and an arm member 483. A bearing hole 485 through which the second rocker arm shaft 415 is inserted is formed in the projecting member 481, and the second rocker arm shaft 41 5 is inserted into the tooth bearing hole 485 so that it can slide in the axial direction and the circumferential direction. The roller support member 482 protrudes from the outer peripheral surface of the protruding member 48 1 and rotatably supports the roller 486. The roller 486 (shown in FIG. 3) is in rolling contact with the outer peripheral surface (cam profile) of the intake cam 451 of the camshaft 411. On the other hand, the arm member 483 of the second rocker arm 413 protrudes from the outer peripheral surface of the projecting member 481 toward the opposite side of the roller support member 482. The tip end of the arm member 483 is provided with a pressing portion 487 which presses the tip end of the valve stems 311 to 313 of the exhaust valve 133. In this embodiment, as can be seen from Figs. 3 and 4, the shim 341 having a specific thickness. Up to 343 is attached to the upper portion of each of the valve stems 311 to 313t. The thickness of the shims 341 to 343 is adjusted to adjust the gap between the rocker arms 412, 413 and the valve stems 3 11 to 3 1 3 to an appropriate value. This operation is performed with the rocker arms 412, 413 displaced relative to the heads of the valve stems 3 11 to 3 13 as shown in Figs. 6 and 7. In this way, since the valve drive mechanism 4 is 133175.doc • 14· 200912123 «the circumference is easier and the angle is easier, it is better to position the head relative to the valve stem 311 to 3 ^ 3 The rocker arms 412, 413 are displaced. Moreover, from the standpoint of allowing the valve drive mechanism 400 to function normally, a configuration is employed that the position of the rocker arms 412, 413 on the rocker shafts 414, 415 is determined to be at an appropriate position at which the rocker arms 412 are located. , 413 is positioned at a specific position relative to the valve stems 311 to 31 3 . In this embodiment, the protruding member 471 of the first rocker arm 412 is supported by the first arm shaft 414 such that it can slide in the axial direction. More specifically, the first rocker arm 412 (shown in Figure 4) slides between the first position and the second position in the axial direction of the first rocker shaft 414. At the first position, the pressing member 477 (478) of the arm member 473 (474) faces the tip end of the valve stem 311 (312), and at the second position, as shown in Fig. 6, the arm member 473 (474) The pressing member 477 (478) is offset from the tip end of the valve stem 3 11 (312) to the side. On the other hand, the projecting member 481 of the second rocker arm 413 is supported by the second rocker arm shaft 4 1 5 so that it can slide in the axial direction. More specifically, the second rocker arm 413 (shown in Fig. 3) slides between the first position and the second position in the axial direction of the second rocker arm shaft 415. At the first position, the pressing member 487 of the arm member 483 faces the tip end of the valve stem 313, and at the second position ' as shown in FIG. 7, the pressing member 487 of the arm member 483 moves from the tip end of the valve stem 313 Bit to the side. In this embodiment, as shown in FIG. 4, at the respective first positions, the first rocker arm 412 abuts the bearing member 461' disposed in the first outer wall 6丨丨 at the side of the valve mechanism chamber 6 And the second rocker arm 413 is adjacent to the branch arm 615. Further, the positions of the pressing members 133175.doc -15- 200912123 4 7 7 , 4 7 8 , 4 8 7 of each of the arm members 473, 474, 483 are determined such that they respectively face the respective valve stems The tip of 311 to 313. At this time, when the movement toward the respective positions occurs, the first rocker arm 412 and the second rocker arm 413 are axially opposite to each other on the first rocker shaft 414 and the second rocker shaft 415 in the opposite direction. Move on. Further, in this embodiment, the 'gaskets 501, 502 (annular members) are fitted to each of the rocker shafts 414, 415. The washers 501, 502 are fitted on the side (second position side) offset from the first position, and at the first position, the pressing members 477, 478, 487 of the arm members 473, 474, 483 of the respective rocker arms 412, 413 Facing the tips of the valve stems 311 to 313. In this embodiment, as described above, after attaching the valve driving mechanism 4, as shown in Fig. 5, the plate 491 is attached to the upper portion of the first chamber 601 of the valve mechanism chamber 6''. As shown in FIG. 4, a through hole 6〇3 is formed in the upper side portion of the support wall 615 and the first outer wall 611. Plate 491 (shown in Figure 5) is attached by screwing nut 604 to the end of a stud (not shown) protruding from through hole 603. A plate 491 (shown in Figure 8) extends and is retained between the outer wall 611 of the cylinder head 113 and the support wall 615 and provides reinforcement for the top plate portion of the first chamber 601 of the valve mechanism chamber 6'. Also, the plate 491 has an open center portion. The rocker arms 412, 413 and the rocker shafts 414, 415 described above are exposed via the opening 492. In this embodiment, the cylinder head cover 4 is also attached to the top plate portion of the cylinder head 113. & More specifically, the cylinder head cover 114 (shown in Figure 3) is a member that is attached to cover the cylinder head 113. In this embodiment, the valve mechanism chamber 600 of the cylinder head 113 described in the above is covered by the cylinder head cover 114. The cylinder head cover 133175.doc -16- 200912123 114 (shown in FIG. 9) has a shape that can cover the opening of the top plate portion of the valve operating mechanism chamber 6 of the cylinder head 113, and the bolt hole 701 is formed in and formed on the outer wall 611. To 614 and the corresponding position of the bolt hole 6〇5 (see FIG. 4) in the support wall 615. Further, in this embodiment, the cylinder head cover 114 (shown in Fig. 9) includes a pin 7ΐ protruding in the direction in which the cylinder head cover 114 is attached to the cylinder head 113. A hole 712 (in which the pin 711 provided in the cylinder head cover 114 is fitted) is formed in the upper side portion of the outer wall of the valve mechanism chamber of the cylinder head 113, as shown in Figs. 4 and 8. In this embodiment, the pin 711 is disposed at two positions in the cylinder head cover 114, and a hole corresponding to the pin 711 is formed in the cylinder head 113. The pin 7 ι and the hole 712 determine the attachment direction when the cylinder head cover 附 14 is attached to the cylinder head 丨 13. Further, since the pin 711 and the hole 712 are provided, the looseness when the cylinder head cover m is attached is reduced, thereby reducing the attachment error of the cylinder head cover ι4. Note that in this embodiment, the pin 711 is disposed in the cylinder head cover ι 4, and the hole 712 is formed in the cylinder head (1). However, the following is sufficient: Pinatsu is disposed in the members (i.e., 'the red head cover 114 and the head ι 3') and the holes are disposed in the other member. Therefore, although the pins are not shown in the figures, the pins are placed in the cylinder head (i 3 and the holes (the pins provided in the cylinder head (1) are fitted into the holes) may be formed in the cylinder Further, in this embodiment, as can be seen from Figures 3 and 5, the seal m is attached to the cylinder head cover 114. More specifically, as shown in Figure 9, the seal 721 is assembled to be formed in A groove (2) in the inner surface of the cylinder head cover ΐ4 is 133175.doc 200912123. A groove 722 is formed in a portion adjacent to the upper side portion of the cylinder head 113. The dam seal 721 is an annular seal having a shape fitted into the groove 722. The cylinder head cover 114 (shown in Figures 3 and 5) is attached to the upper side portion ' of the steam red head 133' in which the seal 721 fits into the groove 722. The seal 721 is entirely over the upper side portion of the cylinder head 113. A hermetic seal is provided around the circumference, and foreign matter is inhibited from entering the valve mechanism chamber 6 of the cylinder head 113. In this embodiment, each of the rocker arms 412, 413 is disposed above the cylinder head 113. The cylinder head cover 14 in the section is guided to each of the rocker shafts 414, 415 A particular position on one. More specifically, the cylinder head cover 114 (shown in Figure 9) is provided with guiding members 731, 732. The guiding members ^, 732 are coupled to the rocker arm 412 when performing attachment to the cylinder head 113, 413 is spouted and the rocker arms 412, 4A are guided to specific positions on the rocker shafts 4, 4, 415. In this embodiment, the guiding members 731, 732 (shown in Figures 3 and 5) are A protrusion protruding in the direction in which the cylinder head cover 11 4 is attached to the cylinder head 113. More specifically, the guide members 731, 732 are respectively from the inner side of the cylinder head cover 114 toward the first one disposed in the valve mechanism chamber 600 The position where the rocker arm 412 and the second rocker arm 413 are disposed protrudes. In this embodiment, the guiding members 731, 732 (shown in Figures 9 and 1B) include outer periphery with the rocker shafts 414, 415. The surface corresponds to the arc-shaped recess 733 '734. When the cylinder head cover 114 is attached to the cylinder head 113, as shown in FIG. 3, the first rocker shaft 4丨4 and the second rocker shaft 4is are fitted to the recess 733, 734. Further, in this embodiment, the guiding members 731, 732 extend toward the outside of the pair of parallel rocker shafts 414, 415. The inclined surface 735, 736 is disposed at the tip end of the guiding members 73 1 and 732. 133175.doc -18· 200912123 In this embodiment, the protrusions serving as the guiding members 731, 732 are disposed at a specific position offset from the rocker shaft 414 (first Position) (at the position where the rocker arms 412, 413 are guided to the specific position when the cylinder head cover ι 4 is attached to the cylinder head 113. Further, the normal to the inclined surfaces 735, 736 is oriented toward the first position, The first position determines the position of the rocker arms 412, 413 on the rocker shafts 414, 415. More special. The first guiding member 731 guiding the first rocker arm 412 is disposed on the first rocker arm shaft 414, as shown in FIG. 9 and FIG. u, in a deviation from the first position (at the first position, the first rocking The pressing member 臂 of the arm 412 (478) faces the position of the stem 311 (3 12) toward the second position. The normal line of the inclined surface 735 of the first guiding member 731 is oriented toward the first position with respect to the direction in which the cylinder head cover 114 is attached to the head cylinder 113, the first position determining that the first rocker arm 412 is at the The position on the rocker shaft 414. In addition, the second guiding member 732 guiding the second rocker arm 413 is disposed on the second rocker arm shaft 415, as shown in FIG. 9 and FIG. 12, in the first position (at the first position, the second shaking) The pressing member 487 of the arm 413 faces the tip end of the valve stem 313 toward the second position. The normal line h2 of the inclined surface 736 of the second guiding member 732 is oriented toward the first position relative to the direction in which the cylinder head cover 114 is attached to the cylinder head 113, the first position determining that the second rocker arm 413 is on the second rocker axis The location on the 415. In this embodiment, when the cylinder head cover 114 is attached to the cylinder head 113, the inclined surfaces 735, 736 of the guide members 731, 732 abut (see Fig. 8) the washers 501, 502 fitted to the rocker shafts 414, 415. Also, when the cylinder head cover 114 is attached to the cylinder head 113, the rocker arms 412, 413 are directed toward the 133175.doc -19-200912123 along the rocker shafts 414, 415. Once the side surface of the cylinder head cover 732 is attached to the cylinder head 113 with the determined first position movement 上文4 described above, the guiding members 731, 413 are held by the rocker arms 737, 738 adjacent the turns 501, 502, And the rocker arm 412 is at a first position on the shafts 414, 415. Further, in this embodiment, as shown in FIG. 9, the cylinder head cover ΐ4 is provided with the blocking members 74!, 742 'the blocking member 741, the % at the cylinder head cover & attached to the cylinder head 113 and the washers 501, 5〇2 with respect to The guiding member is! The loops 501, 502 are blocked when mounted on the opposite side of the first position on the rocker shafts 414, 415. In this embodiment the 'pushing members 73, 732 are provided with ribs 741, 742 on opposite sides of the first position of the rocker shafts 414, 415, and the ribs 741, 742 serve as the blocking members described above. . When the cylinder head cover 114 is attached to the cylinder head 113, if the washers 5〇1, 5〇2 are mounted with respect to the guiding members 731, 732 at opposite sides from the first position of the rocker shafts 414, 415, the ribs The 741, 742 blocks the washers 5〇1, 5〇2 such that the f cylinder head cover 114 cannot be attached to the cylinder head 113. The & can suppress errors caused by the negligence of the workers such as the assembly, and can accurately determine the position of the rocker arms 412, 413 with certainty. Further, in this embodiment, as shown in FIG. 4, the pair of rocker shafts 414, 415 are disposed in parallel in the cylinder head 113. Further, rocker arms 412, 413 are attached to the rocker shafts 414, 415, respectively. Further, the first rocker arm 412 and the second rocker arm 413 are constructed such that when the pressing members 477, 478, 48 7 of the arm members 473, 474, 483 (see FIG. 3) face the valve stems 312, 312, respectively. When the specific position of the tip of the 313 is moved, the first rocker arm 412 and the second rocker arm 413 are respectively moved in the opposite directions in the axial direction of the first rocker shaft 414 and the second rocker arm shaft 415 by 133175.doc • 20-200912123 move. As shown in Fig. 9, the guiding member 731 guiding the first rocker arm 412 and the guiding member 732 guiding the second rocker arm 413 are respectively disposed in the cylinder head cover 114. When the cylinder head cover 114 is attached to the cylinder head 113, the guiding members 731, 732 cause the rocker arms 412, 413 assembled to the pair of rocker shafts 414, 415 to move in opposite directions. Therefore, when the steam head cover 114 is attached to the cylinder head 1丨3, the offset effect with respect to the force necessary to move the rocker arms 412, 413 can be achieved. Therefore, the force necessary to attach the cylinder head cover 114 can be reduced. Further, in this embodiment, the guiding members 73 1, 732 (described above) protrude toward the inner side of the cylinder head cover 114. The recess is formed on the outer side of the cylinder head cover 14 at a portion where the guide members 73 i, 732 are formed, and thus the forgeability is improved and the weight reduction is promoted. In this manner, the cylinder head cover 114 is provided with guiding members 731, 732 that engage the rocker arms 412, 413 when the cylinder head cover 114 is attached to the cylinder head 113, and guide the rocker arms 412, 413 To a specific position (first position) on the rocker shafts 414, 415. In the engine 1A, when the cylinder head cover 114 is attached to the cylinder head 113, the rocker arms 412, 413 are guided to the rocker shafts 4, 4, 415 by the guiding members 731, 732. Location (first position). In addition, the position of the rocker arms 412, 413 can be changed when the cylinder head cover 114 is removed. Further, in this embodiment, the rocker arms 412, 413 are pushed to the ballast positions on the rocker shafts 414, 415 in the technique described in Jp_A_2 〇〇 6_34882. Therefore, when the cylinder head cover 114 is removed, the position of the rocker arms 412, 413 can be easily changed by 133175.doc -21 · 200912123. And in the embodiment, once the upper part of the cylinder head cover ιΐ4, the guiding member 73 is stunned, the shovel 412, 413 is engaged and the arm 2, 413 is held on the rocker shaft 414. At the position of the material. Therefore, even if the engine is moving, the movement of the rocker arm 412 and the river in the axial direction of the rocker arm shaft can be adjusted, and the occurrence of abnormal noise can be suppressed. Further, in this embodiment, the rocker arms 412, 413 have a structure in which the guide members 731, 732 provided in the cylinder head cover m are adjacent to the washers 5G1, 5G2 that are mated to the rocker shafts, 415. The washers 5Qi, 5G2 are interposed between the guide members 731' 732 and the rocker arms 412, 413 provided in the cylinder head cover U4. Therefore, the guiding members 73^732 are not in direct contact with the rocker arms 412, 413 which are strongly shaken during use, and thus the occurrence of vibration and wear in the cylinder head cover ι 4 can be reduced. Further, since the washers 5〇1, 5〇2 are interposed between the guide members 731 and 732 provided in the cylinder head cover 114 and the rocker arms 412 and 413, when the cylinder head cover H4 is assembled to the cylinder head 113, The force acting on the turns 5〇1, 5〇2 from the guiding members 732 acts on the rocker arms 412, 413 via the turns 5, 1, 502. Therefore, since the axial force acts on the rockers 4 12, 413, the resistance when assembling the cylinder head cover 4 to the cylinder head 113 can also be reduced. Therefore, it is advantageous that the gaskets 5〇1, 5〇2 have the required strength' and have a surface structure that allows surface treatment to reduce wear. A plurality of washers 501, 502 can be interposed between the rocker arms 412, 41 3 and the guiding members 731, 732. Moreover, in this embodiment, the guiding members 73 1 , 732 (shown in FIGS. 5 and 9 133175 . doc -22- 200912123) are provided with guiding rocker arms 412 when the cylinder head cover 114 is attached to the cylinder head 113, The inclined surfaces 735, 736 of 413. Providing the inclined surfaces 735, 736 allows the rocker arms 412, 413 to be guided, and thus because the rocker arms 412, 413 can be guided in a continuous progressive manner when the cylinder head cover 114 is assembled to the cylinder head 113, the cylinder head cover 114 is assembled to the cylinder head The resistance at 113 o'clock is reduced and the assembly operation is made easier.
在上文中，描述了根據本發明之實施例之引擎。然而， 根據本發明之引擎不限於上文所描述之實施例。 舉例而言，在上述實施例中作為實例加以描述之引擎 (且特定言之，閥驅動機構等之結構）僅為應用本發明之實 施例之-實例。然而，本發明不限於上文所描述之實施 例。引擎(且特定言之’閥驅動機構等之結構)可應用於各 種結構。 此外，在上述實例中，安置於汽虹頭113之上部部分處 且具備導引構件73!、732之上部配置構件為覆蓋汽缸頭 ⑴之頂部部分之汽缸頭蓋114。然而，上部配置構件不限 於為汽缸頭蓋U4。只要上部配置構件為安置於汽缸頭ιΐ3 之上部部分處且具有如上文所描述之導引構件之導引構件 731、732的構件，上部配置構件即可為支撐_動機構之 凸輪構件之構件（如凸輪载體、凸輪固持器等）。 此外，在上文描述中，描述可鄰接搖臂之塾圈裝配至搖 臂轴之結構。然而，可使用未設置㈣且搖臂直接鄰接導 引構件之結構。在此狀況下’以下為有利的：對搖臂與導 引構件接觸之部分應用表面處理以便抑制磨損。 I33175.doc •23· 200912123 此外，裝配至搖臂軸之構件不限於塾圈。可使用具有環 形形狀之任何構件°注意，以下為特別有利的··環形構件 具有所需之強度、材料等以達成與上文所描述之塾圈相同 之效應。 上文所描述之引擎可用作（例如）安裝於跨坐型車柄（如速 克達摩托車）中之引擎。此外，上文所描述的引擎之結構 不僅可有利地用於上文所描述之類型的引擎令，而且可用 於各種其他類型之引擎中。 【圖式簡單說明】 圖1為展示配備有根據本發明之實施例之引擎的摩托車 之一實例的側視圖。 圖2為根據本發明之實施例的引擎之部分的橫截面圖。 圖3為與根據本發明之實施例之引擎的閥驅動機構有關 的檢戴面圖，且其展示凸輪轴、打開及閉合進氣閥之第一 搖#及打開及閉合排氣閥之第二搖臂的位置關係。 圖4為根據本發明之實施例的引擎之汽缸頭的平面圖， 八示第及第二搖臂分別固持在第一位置處時的狀態。 圖5為包括根據本發明之實施例之引擎的凸輪軸之汽缸 頭的撗截面圖。 圖6為根據本發明之實施例的引擎之汽把頭的平面圖， 其展不第一搖臂已移動至第二位置時的狀態。 圖7為根據本發明之實施例的引擎之汽缸頭的平面圖， 其展示第二搖臂已移動至第二位置時的狀態。 圖8為根據本發明之實施例的引擎之汽缸頭的平面圖， 133175.doc -24- 200912123 其展示移除汽缸頭蓋時的狀態。 圖9為根據本發明之實施例的引擎之汽缸頭蓋 圖。 圖10為沿著圖9中之箭頭F之方向的橫截面圖， 置於根據本發明之實施例的引擎之汽缸頭蓋中 件。 圖11為沿著圖9中之箭頭Η之方向的橫截面圖， 置於根據本發明之實施例的引擎之汽缸頭蓋中的 構件。 圖12為沿著圖9中之箭頭G之方向的橫截面圖， 置於根據本發明之實施例的引擎之汽缸頭蓋中的 構件。 【主要元件符號說明】 100 引擎 101 擺動型引擎單元 111 曲柄軸箱 112 汽缸體 113 汽紅頭 114 汽缸頭蓋 121 曲柄轴 122 連接桿 123 活塞 124 單缸/汽虹 125 凹座 133175.doc 的底面視 其展不设 的導引構 其展示設 第一導引 其展示設 第二導引 •25· 200912123In the above, an engine according to an embodiment of the present invention has been described. However, the engine according to the present invention is not limited to the embodiments described above. For example, the engine (and in particular, the structure of the valve drive mechanism, etc.) described as an example in the above embodiment is merely an example of an embodiment to which the present invention is applied. However, the invention is not limited to the embodiments described above. The engine (and in particular the structure of the valve drive mechanism, etc.) can be applied to various structures. Further, in the above example, the upper portion of the steam head 113 is disposed and provided with the guide members 73, 732, and the upper portion is a cylinder head cover 114 covering the top portion of the cylinder head (1). However, the upper disposition member is not limited to the cylinder head cover U4. The upper disposing member may be a member of the cam member supporting the movable mechanism as long as the upper disposing member is a member disposed at an upper portion of the cylinder head ιΐ3 and having the guiding members 731, 732 of the guiding member as described above ( Such as cam carrier, cam holder, etc.). Further, in the above description, a structure in which the collar of the rocker arm can be attached to the rocker shaft is described. However, a structure in which (four) is not provided and the rocker arm directly abuts the guide member can be used. In this case, it is advantageous to apply a surface treatment to the portion where the rocker arm is in contact with the guide member in order to suppress wear. I33175.doc •23· 200912123 In addition, the components assembled to the rocker shaft are not limited to the ring. Any member having a toroidal shape can be used. Note that the following is particularly advantageous. The annular member has the required strength, material, etc. to achieve the same effect as the one described above. The engine described above can be used, for example, as an engine mounted in a straddle-type handle such as a Scooter. Moreover, the structure of the engine described above can be advantageously used not only for engine commands of the type described above, but also for various other types of engines. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view showing an example of a motorcycle equipped with an engine according to an embodiment of the present invention. 2 is a cross-sectional view of a portion of an engine in accordance with an embodiment of the present invention. 3 is a view of a check-up relating to a valve drive mechanism of an engine according to an embodiment of the present invention, and showing a camshaft, a first rocker that opens and closes the intake valve, and a second that opens and closes the exhaust valve. The positional relationship of the rocker arm. 4 is a plan view of a cylinder head of an engine according to an embodiment of the present invention, in which the eighth and second rocker arms are respectively held at the first position. Figure 5 is a cross-sectional view of a cylinder head including a camshaft of an engine in accordance with an embodiment of the present invention. Figure 6 is a plan view of a steamer head of an engine showing a state in which the first rocker arm has moved to the second position, in accordance with an embodiment of the present invention. 7 is a plan view of a cylinder head of an engine showing a state in which the second rocker arm has moved to the second position, in accordance with an embodiment of the present invention. Figure 8 is a plan view of a cylinder head of an engine in accordance with an embodiment of the present invention, 133175.doc -24- 200912123 which shows the state when the cylinder head cover is removed. Figure 9 is a view of a cylinder head cover of an engine in accordance with an embodiment of the present invention. Figure 10 is a cross-sectional view along the direction of arrow F in Figure 9, placed in the cylinder head cover of the engine in accordance with an embodiment of the present invention. Figure 11 is a cross-sectional view in the direction of the arrow Η in Figure 9, placed in a cylinder head of an engine according to an embodiment of the present invention. Figure 12 is a cross-sectional view in the direction of arrow G in Figure 9, placed in a cylinder head cover of an engine according to an embodiment of the present invention. [Main component symbol description] 100 engine 101 swing type engine unit 111 crank axle box 112 cylinder block 113 steam red head 114 cylinder head cover 121 crank shaft 122 connecting rod 123 piston 124 single cylinder / steam rainbow 125 recess 133175.doc bottom surface The guides that are not set up in the exhibition will be the first guide to display the second guide. 25· 200912123
126 進氣口 126a 閥座 126b 閥導 126c 彈簧座 127 進氣口 127a 閥座 127b 閥導 127c 彈簧座 128 排氣口 128a 閥座 128b 閥導 128c 彈簧座 131 進氣閥 132 進氣閥 133 排氣閥 200 傳動箱 300 後輪 301 閥頭部分 302 閥頭部分 303 閥頭部分 311 閥桿 312 閥桿 313 閥桿 321 閥彈簧 133175.doc •26 200912123 322 閥彈簧 323 閥彈簣 331 閥扣件 332 閥扣件 333 閥扣件 341 填隙片 342 填隙片 343 填隙片 400 閥驅動機構 411 凸輪軸 412 第一搖臂 413 第二搖臂 414 第一搖臂軸 415 第二搖臂軸 421 軸承 422 軸承 423 鏈輪 424 鏈條 451 凸輪 452 凸輪 453 供油通道 461 軸承構件 462 軸承構件 463 軸承孔 133175.doc •27 200912123126 Air inlet 126a Seat 126b Valve guide 126c Spring seat 127 Air inlet 127a Seat 127b Valve guide 127c Spring seat 128 Vent 128a Seat 128b Valve guide 128c Spring seat 131 Intake valve 132 Intake valve 133 Exhaust Valve 200 Gearbox 300 Rear wheel 301 Valve head portion 302 Valve head portion 303 Valve head portion 311 Valve stem 312 Valve stem 313 Valve stem 321 Valve spring 133175.doc • 26 200912123 322 Valve spring 323 Valve magazine 331 Valve fastener 332 Valve Fastener 333 valve fastener 341 shims 342 shims 343 shims 400 valve drive mechanism 411 camshaft 412 first rocker arm 413 second rocker arm 414 first rocker shaft 415 second rocker shaft 421 bearing 422 Bearing 423 Sprocket 424 Chain 451 Cam 452 Cam 453 Oil supply passage 461 Bearing member 462 Bearing member 463 Bearing hole 133175.doc •27 200912123
464 軸承孔 471 突起構件 472 滚輪支撐構件 473 臂構件 474 臂構件 475 轴承孔 476 滾輪 477 擠壓構件 478 擠壓構件 481 突起構件 482 滚輪支撐構件 483 臂構件 485 軸承孔 486 滾輪 487 擠壓構件 491 板 492 開口 501 墊圈（環形構件） 502 墊圈（環形構件） 600 閥動機構室 601 第一腔室 602 第二腔室 603 通孔 604 螺母 133175.doc -28- 200912123 605 610 611 612 613 614 615 701 711 712 721 722 731 732 733 734 735 736 737 738 741 742 1000 hi 螺栓孔 底部分割壁 外壁/第·一外壁 外壁/第二外壁 外壁/第三外壁 外壁 支撐壁 螺栓孔 銷 孔 密封件 凹槽 第一導引構件（突起部） 第二導引構件（突起部） 凹座 凹座 傾斜表面 傾斜表面 導引構件之側表面 導引構件之側表面 肋狀物（阻擋構件） 肋狀物（阻擋構件） 摩托車（車輛） 傾斜表面之法線 133175.doc -29- 200912123 h2 傾斜表面之法線 01 孔中心線 C ί -30- 133175.doc464 bearing hole 471 protruding member 472 roller supporting member 473 arm member 474 arm member 475 bearing hole 476 roller 477 pressing member 478 pressing member 481 protruding member 482 roller supporting member 483 arm member 485 bearing hole 486 roller 487 pressing member 491 plate 492 opening 501 washer (annular member) 502 washer (annular member) 600 valve mechanism chamber 601 first chamber 602 second chamber 603 through hole 604 nut 133175.doc -28- 200912123 605 610 611 612 613 614 615 701 711 712 721 722 731 732 733 734 735 736 737 738 741 742 1000 hi Bolt hole bottom partition wall outer wall / first outer wall outer wall / second outer wall outer wall / third outer wall outer wall support wall bolt hole pin hole seal groove first guide Leading member (protrusion) second guiding member (protrusion) recessed recess inclined surface inclined side surface guiding member side surface guiding member side surface rib (barrier member) rib (blocking member) motorcycle Car (vehicle) normal to the inclined surface 133175.doc -29- 200912123 h2 normal to the inclined surface 01 hole center line C ί -30- 133175.doc