200403385 (1) 玖、發明說明 【發明所屬之技術領域】200403385 (1) 发明. Description of the invention [Technical field to which the invention belongs]
本發明有關於：在於具備有：設有可連通於燃燒室之 吸氣口及排氣口之氣缸頭，及爲了分別開閉吸氣及排氣口 ’使之可實施直線的開閉動作，而配置於上述氣缸頭之吸 氣閥及排氣閥，及旋轉可能地支承於上於氣缸頭之凸輪軸 ’以及分別介裝於該凸輪軸以及上述吸氣閥及排氣閥間之 吸氣側搖臂及排氣側搖臂。 上述凸輪軸係被配置於比上述吸氣閥及排氣閥與上述 吸氣側及排氣側搖臂之連動，連結點而靠近於上述燃燒室 之引擎。 【先前技術】 以往此種引擎係例如在於日本專利公報實開平3 -321 04號就已習知。在此種引擎中，由於將凸輪軸配置於 ’比吸氣閥及排氣閥與吸氣側排氣側搖桿之連動連結點而 靠近於燃燒室，因此可以使氣缸頭在於沿著氣缸軸線之方 向而小型化。 【發明內容】 惟依上述先前者時，吸氣閥及排氣閥係挾著凸輪軸而 分別左右配置成V字形，所以吸氣閥及排氣閥與吸氣側及 排氣側搖臂之連動，連結點係互相地離開，致使氣缸頭之 寬度比較的變大。 -5- (2) (2)200403385 本發明係鑑於上述之情形所創作，提供一種一方面可 以使氣缸頭之寬度窄狹化，同時在於沿著氣缸軸線之方向 而可以使氣缸頭更小型化之引擎爲目的。 爲了達成上述目的申請專利範圍第1項之發明係： 在於具備有：設有可連通於燃燒室之吸氣口及排氣口 之氣缸頭，及爲了分別開閉吸氣及排氣口，使之可實施直 線的開閉動作，而配置於上述氣缸頭之吸氣閥及排氣閥， 及旋轉可能地支承於上於氣缸頭之凸輪軸，以及分別介裝 於該凸輪軸以及上述吸氣閥及排氣閥間之吸氣側搖臂及排 氣側搖臂， 上述凸輪軸係被配置於比上述吸氣閥及排氣閥與上述 吸氣側及排氣側搖桿之連動，連結點而靠近於上述燃燒室 之引擎中， 上述吸氣閥及排氣閥係將該開閉動作方向爲平行地配 設於上述氣缸頭，上述吸氣口及排氣口之一方之特定之口 係，在於對於直交於上述凸輪軸之軸線之平面之投影圖上 ，以至少疊合於該凸輪軸之一部份地，在於從上凸輪軸之 軸方向之一端離開之位置地設置於上述氣缸頭爲其特徵。 依上述申請專利範圍第1項所述之發明之構成時，吸 氣閥及排氣閥之開閉動作方向爲互相平行，且由於得將吸 氣閥及排氣閥與吸氣閥側及排氣閥側搖臂之連動。連結點 配置於互相近之位置以資窄狹氣缸頭之寬度。並且在於直 交於凸輪軸之軸線之平面之投影圖上，至少疊合凸輪軸之 一部份狀地，從上述凸輪軸之軸方向一端離開之位置上地 -6- (3) (3)200403385 ，在於氣缸頭上，設置吸氣口及排氣口之一方’所以得將 凸輪軸更靠近於燃燒室側地予以配置，結果在於沿著氣缸 軸線之方向而更可以使氣缸頭小型化也。 又，本發明申請專利範圍第2項所述之發明係在申請 專利範圍第1項之構成加上，上述特定之口係吸氣口’上 述吸氣口及上述排氣口之對於燃燒室之開口端係配置於’ 與上述凸輪軸之軸線成平行之一直線上爲其特徵。依此構 成時得在於燃燒室發生漩渦而提高燃燒效率。 如申請專利範圍第3項所述之發明乃在於申請專利範 圍第1項或第2項所述之發明之構成，加上具有：對於共同 地包含上述吸氣閥及排氣閥之軸線之平面而形成銳角之軸 線之點火塞係安裝於上述氣缸頭爲其特徵，依此構成時’ 可以避免在於點火塞之附近配置有關於吸氣閥及排氣閥之 零件，而可以確保充分之空的空間，由而使點火塞充分獲 得冷卻風，有效的冷卻點火塞。 再者申請專利範圍第4項之發明乃在上述申請專利範 圍第2項所述之發明之構成加上，上述吸氣口係，對於共 同地支承上述吸氣側搖臂及上述排氣側搖臂之搖桿軸，與 直交於氣缸軸線（C )之平面之投影圖上，成交叉狀地 設置於氣缸頭爲其特徵。而依此構成時，得沿著搖桿軸之 軸線之方向，可以使氣缸頭小型化。 【實施方式】 下面依據附圖所示之本發明之實施例說明本發明之實 -7- (4) (4)200403385 施形態。 第1圖乃至第12圖表示本發明之第1實施例。第1圖 係第1實施例之機車之側面圖。第2圖係沿第1圖2-2線之 機車之後部橫斷平面圖。第3圖係機車之後部放大側面圖 。第4圖係第3圖之4-4線剖面圖。第5圖係第4圖之前部放 大圖。第6圖係引擎主體之前部放大切開側面圖。乃第7圖 之沿6 - 6線之剖面圖。第7圖係第6圖之7 - 7線之剖面圖。第 8圖係第7圖之8-8線之剖面圖。第9圖係第5圖之要部放大 圖。第10圖係第4圖之後部放大圖。第11圖係第3圖之11-1 1線放大剖面圖。第12圖係第3圖之12-12線剖面圖。 首先在於第1圖中，附腳踏板之機車之車體台架15係 具備有，其前端設有頭管1 6而朝後方向低地傾斜之主機架 17，及成一體地連設於主機架17之後部而延伸於上方之椅 柱18，及被形成爲開口於前方之略U字狀’且兩端係固著 於上述椅柱18之支承支柱28，及分別連結支承支柱28， .........之左右兩側及椅柱1 8間地從椅柱1 8而延伸於朝後昇 高之補構件29，.........。 在於頭管16上，操向自如地支承有前叉19 ’在於該前 叉19之下端軸支有前輪WF。在於前叉19之上端設置桿狀 之操向把手20。換言之，前叉19及操向把手20係由頭管16 而操向可能地予以支承。 在於操向把手2 0之左右兩端’分別操作可能地配設有 煞車桿21。這些煞車桿21，.........之操作力係被輸入於配 置於頭管16之前方且支承於該頭管16之平衡器22 °該平衡 -8 - Γ (5) (5)200403385 器22乃被構成爲不管操作左右任一煞車桿21，.........均能 對於裝著於前輪WF之前輪用煞車BF ’以及裝著於後輪WR 之後輪用煞車BR可以傳達煞車操作力地被構成。 又在於設於前叉19之上部及操向把手20間之貨籃支承 構件23將支承，配置於操向把手20及頭管16之前方之貨籃 24，及配置於該貨籃24之下方之頭燈25。 一倂參照第2圖及第3圖。在於椅柱18上，從上方插入 在該上端具備駕駛者之乘座之用之鞍狀之座椅26之座椅支 承管27，該座椅支承管27係使上下位置調節自如地固定於 椅柱1 8。 在於上下支承支柱28上，支承有配置於上下座椅26之 後方斜下位置之燃料箱3 0，在於該燃料箱3 0之下面’安裝 用於控制載置於車體台架1 5之引擎E之運轉之電子控制組 成3卜 又在支承支柱28之後部，安裝有左右一對之後方向燈 3 2、3 2，以及配置於這些之後方向燈3 2、3 2間之後燈3 3。 在於第4圖，引擎E力具有延伸於車體台架15之左右方 向之曲柄軸37之單氣缸空冷式之引擎。該引擎主體38係具 備有，旋轉自如地支承曲柄軸37之機匣39，及備有從該機 匣39微小地延伸於前上昇方向之氣缸軸線C，且結合於機 匣39之氣缸體40，及結合於氣缸體40之氣缸頭41，以及在 於氣缸體40之相反側而結合於氣缸體41之頭蓋42，並且在 於氣缸體40及氣缸頭41之外面，分別複數片地凸設有冷卻 散熱片 40a ’ .........4 1 a 5 .........。 (6) (6)200403385 滑動自如地嵌合於設於氣缸體40之氣缸孔43之活塞44 係介著連桿45及曲柄梢46而連結於曲柄軸37。該曲柄軸37 係介著一對於滾珠軸承47、48而旋轉自如地支承於機匣39 〇 另外在於比一方之滾珠軸承4 7之外方，在於曲柄軸3 7 及機匣39間介裝環狀之封密構件49。 並且，在於曲柄軸37之一端部，沿著機車之進行方向 之右側而從機匣39突出固定於曲柄軸37之一端之轉子50及 收容於該轉子50內之定子51而構成AC發電機52。該AC發 電機52係以結合於機匣39及氣缸體40之右引擎蓋53所覆罩 ，上述定子51係固定於機匣39。 一倂參照第5圖乃至第8圖。在於氣缸頭41上設置有， 臨接於上述活塞44之頂部，形成於氣缸體40及氣缸頭41之 間，可連通於燃燒室55之吸氣口 56及排氣口 57。同時配設 有分別開閉上述吸氣口 56及排氣口 57之吸氣閥58及排氣閥 59 ° ' 吸氣閥58及排氣閥59係藉由設置於氣缸頭41之導筒60 、6 1所引導直線的實施開閉動作。 設置於從各導筒60、61之吸氣閥58及排氣閥59之端部 之保持器62、63以及氣缸頭41間分別設置有閥簧64、65。 吸氣閥58及排氣閥59係分別藉由各閥簧64、65分別以彈簧 彈撥於門閥方向。 並且上述各導筒60、61乃，該共同地包含這些導筒 、61之平面P1係與包含曲柄軸37之軸線及氣缸軸線C之平 r y r：； 10- (7) (7)200403385 面P2成銳角而交叉狀地，具有互相平行之朝前方上昇之軸 線狀地地設置於氣缸頭41。於是吸氣閥58及排氣閥59乃可 以動作成互相平行之開閉動作方向狀地配設於氣缸頭4 1。 在於氣缸頭4 1及頭蓋42間形成有動閥室66。開閉驅動 該分別以彈簧彈撥於閉閥方向之上述吸氣閥5 8及排氣閥5 9 之動閥裝置67係收容於該動閥室66。 動閥裝置67係具備：具有與曲柄軸37平行之軸線而旋 轉自如地支承於氣缸頭41之凸輪軸68，及具有與該凸輪軸 68平行之軸線，固定地支承於氣缸頭41之搖桿軸69 (搖臂 軸），及擺動可能地支承於該搖桿軸69且介裝於上述凸輪 軸6 8及上述吸氣閥58間之吸氣側搖臂70，以及與該吸氣側 搖臂70—齊擺動自如地支承於上述搖桿軸69且介裝於上述 凸輪軸68及上述排氣閥59之間之排氣側搖臂71。 在於凸輪軸68分別設有吸氣側凸輪72及排氣側凸輪73 。又在其一端具備有滑接於吸氣側凸輪72之凸輪滑塊70a 之，吸氣側搖臂70之另一端係可以調節其進退位置地螺合 有，抵接於吸氣閥58之端部之挺桿螺栓74。 又，在其一端具備有滑接於排氣凸輪73之凸輪滑塊 7 1 a之排氣側搖臂7 1之另一端部係可以調節其進退位置地 螺合有抵接於排氣閥5 9之端部之挺桿螺栓7 5。 按凸輪軸68係配置於比，吸氣側及排氣側搖臂70、7 1 與吸氣閥5 8及排氣閥5 9之連動·連結點。換言之，比挺桿 螺栓74、75之吸氣閥58及排氣閥59之接觸點而靠近於燃燒 室5 5地被配置者。在本實施例中，係配置於比吸氣閥58及 -11 - (8) (8)200403385 排氣閥59之上方地配置了凸輪軸68。 並且，吸氣口 5 6乃在於直交於凸輪軸68之軸線之投影 圖（參照第8圖）上，至少疊合於凸輪軸68之一部份（本 實施例係圖示一部份）地配置於從凸輪軸6 8之軸方向一端 離開之位置上，同時，在於直交於氣缸軸線c之平面之投 影圖（參照第7圖）上，即與凸輪軸69成交叉狀地設置於 氣缸頭4 1。 吸氣口 5 6及排氣口 5 7之對於燃燒室5 5之開口端係如明 示於第7圖，配置在與凸輪軸68及搖桿軸69之軸線成平行 之一直線上。吸氣口 5 6之外端係開口於氣缸頭4 1之上部側 壁，排氣口 5 7之外端係開口於氣缸頭4 1之下部側壁。 又，對於共同地包含具有將吸氣閥58及排氣閥59之軸 線之平面P1而成爲銳角α之點火塞76係面臨於燃燒室55狀 地安裝於氣缸頭4 Γ。 在於凸輪軸68與曲柄軸37之間，將設置將曲柄軸37之 旋轉動力之1 /2之減速比地傳遞於凸輪軸6 8之定時傳動機 構77 (調時傳動機構77 )。該定時傳動機構77係具備有， 在於比上述滾珠軸承48之外方而固定於曲柄軸37之驅動鏈 輪78，及固定於凸輪軸68之另一端部之被動鏈輪79。捲架 於驅動及被驅動鏈輪78、79之無端狀之鏈條80。從機匣39 經過氣缸體40及氣缸頭41到頭蓋42之部份，在於該引擎主 體3 8上將形成爲了使上述凸輪鏈條80行走用之凸輪鏈條室 8 1 〇 在於第9圖上，氣缸頭41上，以同軸地設置：用於收 -12 - (9) (9)200403385 容凸輪軸68之一端部之圓形之第1支承凹部82’及用於貫 穿凸輪軸68之第1支承孔83°第1支承孔83乃被形成爲可以 插通，設置於凸輪軸68之吸氣側凸輪72及排氣側凸輪73程 度之大的直徑。並且在於上述第1支承凹部82之內面及凸 輪軸68之一端部外面間’介裝有滾珠軸承84。而上述第1 支承孔83之內面及凸輪軸68之另一端側外面間亦介裝滾珠 軸承85，而且在於上述滾珠軸承85之外方之凸輪軸68之另 一端，以複數之螺栓86，.........而將被動鏈輪79固定於同 軸。 在於上述氣缸頭4 1之一側壁（在本實施例係朝著機車 之進行方向狀態，而在氣缸頭4 1之左側壁）設有，從該左 側壁側將上述凸輪軸68組配於氣缸頭4 1，同時對於該凸輪 軸68可以安裝上述被動鏈輪79之用之第1組配用開口部87 。該開口部87係具有比第1支承孔83大直徑之直徑地予以 設置，此第1組配用開口部87係藉第1蓋構件88來封閉者。 對於設置於第1組配用開口部87之母螺牙89螺合由而第1蓋 材88係固定於氣缸頭41，在於第1組配用開口部87之外端 及第1蓋構件88間將挾置環狀之封密構件90。 並且在於第1蓋構件8 8之外面，沿著一直徑線地形成 有當欲旋轉操作第1蓋構件88時用於卡合工具用之卡合溝 91。再者’第1蓋構件88之內面，凸設有凸出於被動鏈輪 側7 9側之限制凸部92，由於被動鏈輪79之滑接於此限制凸 部92 ’由而可以防止凸輪軸68之拔出於第]組配用開口部 8 7側。 -13- (10) (10)200403385 在於氣缸頭41上，同軸地設有，用於嵌合搖桿軸69之 一端部而支承之圓形之第2支承凹部95，及插通搖桿軸69 之另一端而予以支承之第2支承孔96。對應於第2支承孔96 之部份之氣缸頭4 1及搖桿軸69上’螺合了螺栓9.7，就可以 將搖桿軸69固定地支承於氣缸頭41。 在於上述氣缸頭41之左側壁，以具有與第2支承孔96 大致上同直徑之直徑地設置有，爲了從左側壁側而可以將 上述搖桿軸69組配於氣缸41用之第2組配用開口部98，第2 組配用開口部98係使用第2蓋構件99來封閉者，第2蓋 構件99係以阻止軸方向內方側之移動地氣密地嵌合於第2 組配用開口部98。換言之，在其外端備有卡合於第2組配 用開口部98之外端周緣之凸緣部99a之第2蓋構件99係， 在其外周裝著環狀之封密構件100之後，嵌合於第2組配用 開□部9 8。 並且在於凸緣部99a上設有，第1蓋構件88之一部份 之可以從外方側卡合於第2蓋構件99用之切開部99b。於 是第2蓋構件99之嵌合於第2組配用開口部98之後，對於 第1組配用開口部87螺合第1蓋構件88，由而第1蓋構件 88之固定於氣缸頭41之同時也完成第2蓋構件99之固定 於氣缸頭4 1。 在開口於氣缸頭4 1之上部側面之吸氣口 5 6上，介著氣 化器102連接有，配置於動力組成P之上方之由該動力組 成P所支承之空氣濾淸器101。 又’連接於開口於氣缸頭4 1之下部側面之排氣口 5 7且 -14 - (11) (11)200403385 延伸於後方側之排氣管103之後端，連接有配置於後輪WR 之右側之排氣消音器104。 按，對於排氣口 5 7將供給排氣淨化用之二次空氣者’， 在於引擎主體38之頭蓋42之右側前部設置有簧片閥105， 該簧片閥105之上游側係介著不圖示之軟管而連接於空氣 濾淸器1 〇 1，在於簧片閥1 〇5之下游側係介著二次空氣供給 路而連接於排氣口 5 7。 上述簧片閥1〇5之閥殼體1〇8係由：與頭蓋42成一體地 設置之殻體主部109’及固定於該殻體主部109之蓋110所 構成。在殼體主部1〇9及蓋110間’挾持有將閥殼體108內 劃分爲，蓋1 10側之上游側之上游室1 1 1與殼體主部1〇9側 之下游室1 1 2用之閥座板1 1 3。在於該閥座板1 1 3設有連結 上游室Π 1及下游室1 1 2間之閥孔11 4。 在於面臨於閥座板Η 3之下游室1 1 2側之面之臨於上述 閥孔1 1 4之部份，以共同鎖固地固定有，與閥座板1 1 3之間 設有間隔之擋止器板1 1 5以及封閉上述閥孔1 1 4狀地可抵接 於閥座板1 1 3之簧片1 1 6之一端。 成一體地設於上述蓋11〇之連接管部ll〇a上將連接不 圖示之軟管之下游端，而該軟管之上游端係連接於空氣濾 淸器1 〇 1。 二次空氣供給路107乃，將連通於上述下游室112而設 於頭蓋42之第1通路部107a，及連通於排氣口 57而設於氣 缸頭41之第2通路部107b之連接於將其外面曝露於外氣 之二次空氣供給路μ 7而構成者。換言之二次空氣供給路 -15· (12) (12)200403385 1 〇 7之一部份係由上述二次空氣供給路1 1 7所形成。 在形成排氣口 57之部份中之氣缸頭41之一部份’形成 有凸出於下方之凸出部41b。而對應於此氣缸頭41之凸出 部4 1 b地，頭蓋4 2之下部係被形成爲從氣缸頭4 1之頭蓋4 2 側側面而朝向下方凸出狀。並且在於頭蓋4 2上形成有第1 通路部l〇7a，該第1通路部l〇7a乃將該上游端連通於簧片 閥105之下游室，且將該下游端朝向上述氣缸頭41之凸出 部41b地予以開口。而第2通路部107b係將對向於第1通路 部1 〇7a之下游側開口端地將該上游端予以開口，同時將下 游端開口於排氣口 5 7狀地形成於氣缸頭4 1之上述凸出部 4 1 b 〇 二次空氣供給路117係挾持於氣缸頭41之上述凸出部 4 lb及上述頭蓋42之下部間者。二次空氣供給管1 17之兩端 係嵌合於上述第1通路部107a之下游開口部及第2通路部 1 0 7 b之上游端開口部。 在於二次空氣供給管1 1 7之兩端外面，與引擎主體3 8 之頭蓋42及氣缸頭41之間，換言之第1通路部107a之下游 端開口部內面與第2通路部107b之上游開口部內面之間分 別介裝有〇形環1 1 8、1 1 9。在於二次空氣供給管1 1 7之兩 端部分別形成將上述Ο形環1 1 8、1 19挾持於頭蓋42與氣缸 頭4 1之間用之擴徑部1 1 7a、1 17b。 按’引擎主體38乃，將上述二次空氣供給管1 17面臨 於機車之行走方向之前方，並且連接簧片閥105及連接該 簧片閥105與二次空氣供給管】17間地設於頭蓋42之第！通 -16 - (13) (13)200403385 路部107a面臨於機車之行走方向之前方之姿勢地載置於機 車上者。爲了行走風之有效地接觸於二次空氣供給管1 1 7 起見，本實施例乃將二次空氣供給管1 1 7配置於引擎主 體38之前部下方狀地將引擎主體載置於車體機架15也。 又，如第4圖及第5圖所示，在於滾珠軸承48之近傍之 機匣39中，結合有從機匣39內之下部泵上機油之油泵123 之泵殻體124。而與此油泵123之輸入軸125成一體地設置 之被動齒輪126將嚙合與上述定時傳動機構77之驅動鏈輪 78成一體地設置之驅動齒輪127。換言之油泵123係隨應於 曲柄軸3 7之旋轉地實施泵送動作。 在此油泵123之吐出口 128乃連通有，從機匣39而介著 氣缸體40及氣缸頭41到頭蓋42之（機）油通路129。爲了 潤滑搖桿軸69與吸氣側及排氣側搖臂70、7 1之間，在於氣 缸頭41及搖桿軸69上將設置通於上述（機）油通路129之 通路 1 3 0、1 3 1。 再者，在於頭蓋42上，可通至上述（機）油通路129 之下游端地，設有對於吸氣側及排氣側凸輪72、73及吸氣 側及排氣側搖臂70、71之凸輪滑塊70a、71 a之滑接部而噴 出機油用之複數之機油噴出孔132，.........。 再者，在於頭蓋42上，面臨於機油通路129之下游部 地安裝有安裝有，做爲代表引擎溫度之溫度而檢測出上述 機油之溫度之溫度感測器1 3 3，在於第1蓋構件8 8之後方 側而在於氣缸體40上裝卸自如地配設有對於機匣39內供給 機油之給油蓋1 3 4。 -17- (14) (14)200403385 參照第10圖，動力傳達裝置T係具備有，將從曲柄軸 37 輸出之動力，自動的且無階段地變速之V形皮帶型自 動變速機135，以及設於該V形皮帶型自動變速機135與後 輪WR之車軸137間之減速齒輪系136。 本動力傳達裝置Τ之殻體138係由：沿著機車之進行方 向之左側而結合於機匣39及氣缸體40，延伸至後輪WR之 左側之殼體主體1 3 9，及以覆罩該殼體主體1 3 9之左側地結 合於殼體主體139之左側殻體140，及以覆罩殻體主體之後 部右側地結合於殼體主體1 3 9之右側殻體1 4 1所構成者，在 於殼體主體139與左側殼體140之間形成第1傳動室142，而 於殼體主體139之後部及右側殼體141間形成第2傳動室143 〇 並且在於殼體主體139上，成一體地設置，與上述油 泵外殻124協同動作而旋轉自如地支承機油泵123之輸入軸 125之筒狀之軸承箱144。設於上述輸入軸125之被動齒輪 126乃挾持於油泵箱124與軸承箱144之間。 V形皮帶型自動變速機135係收容於第1傳動室142者 。具備有：裝著於曲柄軸37之另一端部之驅動帶箱145’ 及具有與曲柄軸37平行之軸線而旋轉自如地支承於殼體主 體139及右側殼體141之被（驅）動軸146，以及裝著於該 被（驅）動軸146之被動帶輪147，以掛搭於驅動帶輪145 及被動帶輪147之無端狀之V形皮帶148。 驅動帶輪145乃由，固定於曲柄軸37之另一端部之固 定帶輪半體149，及對於固定帶輪半體149可以實施接近· -18- (15) (15)200403385 離開，且滑動可能地支承於曲柄軸37之可動帶輪半體150 ，及隨應於曲柄軸37之旋轉數之增加而發揮將可動帶輪半 體1 5 0推壓於固定帶輪半體1 4 9側之力量之灕心機構1 5 1所 構成。 被（驅）動軸146係介著滾珠軸承152、153而旋轉自 如地支承於右側殼體141及殼體主體139。被（驅）動帶輪 147係由：對於被（驅）動軸146而以軸線方向之位置爲一 定的相對旋轉可能地支承之固定帶輪半體1 5 4，及對於固 定帶輪半體1 54可能接近·離開地，滑動自如又相對旋轉 自如地支承於固定帶輪半體154。同時，朝向固定帶輪半 體154側彈簧彈撥之可動帶輪半體155所構成。 並且在於固定帶輪半體154與被（驅）動軸146間，設 置有隨著固定帶輪半體154之旋轉數之增加而連接固定帶 輪半體154與被（驅）動軸146間之離心離合器156。 減速齒輪系136係被收容於第2傳動室143內。由：兩 端部係旋轉自如地支承於右側殼體1 4 1及殼體主體1 3 9之中 間軸159，及設於被（驅）動軸146之第1齒輪160，及嚙合 於第1齒輪160而設於中間軸159之第2齒輪161，及設於 中間軸159之第3齒輪162，以及嚙合於第3齒輪162之第 4 齒輪163所構成。在於後輪WR之車軸137與第4 齒輪 1 63間，介裝第1單向離合器164。 按，當機車之朝向進行方向之前方之狀態之機匣39之 右側壁固定（繫結）有，延伸到後輪WR之右側之車軸支 承構件1 6 5。 (16) (16)200403385 後輪WR之車軸137係旋轉自如地支承於’設於該車軸 支承構件165之後部之支承筒部166，動力傳達裝置T之殼 體138之右側殼體Ml，以及上述殼體138之殼體主體139。 換言之車軸137係旋轉自如地貫穿上述支承筒部166及 右側殼體141而突入於第2傳動室143。在於支承筒部166 及車軸1 3 7間介裝有滾珠軸承1 67，在於右側殼體1 4 1與車 軸137間介裝滾珠軸承168，在於殻體主體139與車軸137間 介裝滾珠軸承157也。 又對於從支持筒部166之外方之車軸137之突出端部介 著第2單向離合器而裝著有被（驅）動鏈輪170。 在於第11圖中，在於車體台架15之主機架17之後部固 著有延伸於下方之左右一對之機架側托架1 7 1、1 7 1 °在於 設於兩機架側托架1 7 1、1 7 1間之支承筒1 72上，介著滾珠 軸承174、174而旋轉自如地支承有，具有與後輪WR之車 軸137成平行之軸線且貫穿支承筒172之腳踏板軸173之兩 端部，而從支承筒172所突出之腳踏板軸173之兩端將固著 曲柄型腳踏板34，.........。 在於右側之曲柄型腳踏板34與上述支承筒172間，對 於腳踏板軸173將固定驅動鏈輪175。又在於車軸137之下 方配置有，支承於，與該車軸1 3 7成平行之軸線爲中心而 可以迴旋地支承於上述車軸支承構件165之支承臂176，而 在此支承臂1 7 6上，旋轉自如地支承一對之鏈輪1 7 7、1 7 8 〇 於是，對於上述驅動鏈輪175，及上述車軸137側之被 -20- (17) (17)200403385 (驅）動鏈輪170’及上述兩鏈輪177、178上搭架無端狀 之鏈條179，上述支承臂176係藉由彈簧而被彈撥於使鏈條 179緊張之方向。又由外側覆罩上述鏈條179之鏈條蓋180 係支承於車體台架1 5。 詳述之，對於後輪WR之車軸137，一方面介著動力傳 達裝置T而可以傳達來自引擎E之動力’同時腳踏曲柄型 腳踏板34所發生之動力也可以傳達。藉由第1及第2單向離 合器164、169之作用，來自引擎E之動力與來自腳踏板34 ，.........之動力之中，旋轉數高之動力係可傳達於車軸137 。但是如爬坡等而旋轉後輪WR所需之負載變局時’得由 引擎E及腳踏板34，.........之兩方而對於車軸137傳達動力 也。 按，後輪用煞車BR係包含有固著於相對旋轉不能地 結合於車軸137之車軸筒181之煞車鼓輪182之鼓輪式煞車 〇 後輪WR係由，固定於上述煞車鼓輪182之轂183，同 軸地圍繞轂183之輪緣184，及裝著於輪緣184之輪胎185， 以及設於轂183及輪緣184間之複數之鋼絲輪輻186，......... 所構成。 轂183係由，藉熔接而固著於煞車鼓輪182之外周之圓 筒部183a，及成一體地設於該圓筒部183之兩端部之一對 之凸緣183b、183b所構成。在於兩凸緣i83b、183b分別設 置用於卡合各鋼絲輪輻186b，.........之內端之複數之連結 孑L 1 8 7。 (18) (18)200403385 以如上述具備成一體地連結複數之鋼絲輪輻1 86， ；........之一對凸緣183b，183b地構成轂183之結果，與以複 數之構件而構成轂者做比較時，得於解消，對於複數搆件 之接合面而由水之浸入所致之銹之發生之問題。並且轂 U3係藉一體成形所製，因此將兩凸緣183b、183b熔接於 煞車鼓輪1 8 2時之熔接工模乃，只要對於轂1 8 3之定位就可 以’因此加工工數很小就可完成。並且由於將轂1 8 3予以 一體成形，由而在於車軸137之軸線方向相互面向地很容 易地確保設於兩凸緣1 8 3 b、1 8 3 b之連結孔1 8 7，.........之位 置精度。又前輪WF亦與後輪WR同樣地被構成。 動力組成P之前部係介著防振連桿1 8 8而上下擺動自如 地支承於車體台架1 5者。 防振連桿188乃具備有：自車體中心線BC而偏倚於左 側之位置而設於動力組成P之殼體主體1 3 9之靠前方下部位 置之左右一對之引擎側托架189、189，及固著於車體台架 15之主機架17之左右一對之機架側托架171、171，及配置 於上述兩引擎側托架189、189間之圓筒狀之擺動筒190， 及擺動自如地支承該擺動筒190地，設於兩引擎側托架189 、189間之連結軸191，及被形成爲其橫斷面呈矩形之筒狀 而其一端固著於上述擺動筒190之連桿構件192，及配置於 上述兩機架側托架171、171間，同時上述連桿構件192之 另一端之被固著之圓筒狀之外筒193，及同軸地配置於該 外筒193內之圓筒狀之內筒194，及對於其內周分別紅套於 內筒194之兩端部同時壓入於上述外筒193之兩端部之圓筒 -22- (19) (19)200403385 狀之殼體195，分別燒結其外周之橡膠襯套196，.........。 及以擺.動可能地支承上述內筒1 9 4地設於上述兩機架側托 架171、171間之擺動支軸197及固著於上述外筒193之軸 方向中間部而延伸於前方之臂198，以及將裝著·於臂198之 前端之擋止器橡膠199。 上述擋止器橡膠199乃，令該被抵接體200之上下內面 可接觸擋止器橡膠199之上下兩面地插入於固著於設於兩 機架側托架171、171間之支承筒172之筒狀之被抵接體200 內。 並且被抵接體200及擋止器橡膠199係被配置於自車體 中心線BC而更偏倚於上述引擎側托架189、189及上述連 桿構件192更左側之位置。 在此種構成之防振連桿188乃，該由動力組成P之引擎 E而作用於擺動支軸197之負載係由橡膠襯套196，.........之 彈性變形所吸收，同時由擋止器橡膠1 99之被壓接於被抵 接體200之上下內面所致之彈性變形所吸收，並且藉擋止 器橡膠199之抵接於被抵接體200之上下內面而被限定動力. 組成P之上下擺動範圍也。 一倂參照第1 2圖，動力組成P之上部及車體台架1 5間 係以使動力組成P之上下擺動可能地，以非伸縮性之支承 構件201來連結。並且在本第1實施例乃，在於自車體中 心線B C而偏倚於左側之位置，而在於動力組成P之殼體主 體139之靠前方上部設置托架202。又自車體中心線BC而 偏倚於左側之位置而在於車體台架1 5之支承支柱2 8與左側 -23- (20) (20)200403385 之補強構件29間係設置有托架203。 形成於中實之圓柱狀之支承構件201之上端係，介著 橡膠襯套2〇4，及具有與防振連桿188之擺動支軸197成平 行之連結軸205而擺動自如地連結於車體台架15側之托架 203 ° 又支承構件201之下端係介著橡膠襯套206，及具有與 上述連結軸205平行之連結軸207而擺動自如地連結於動力 組成P側之托架202。 並且在於上述兩托架202、203係，於後輪WR之前方 而兩托架202、203之介著支承構件201而可以連結地分別 設置於動力組成P及車體台架15。 接著說明本實施例之作用。在於引擎E上’凸輪軸68 乃配置於，比吸氣閥58及排氣閥59與吸氣側及排氣側搖臂 70、71之連動.連結點而靠近於燃燒室，且吸氣閥58及排 氣閥59乃以其開閉動作方向爲平行地配設於氣缸頭41 ° 因此將開閉動作方向爲互相平行之吸氣閥5 8及排氣閥 5 9，及將吸氣側及排氣側搖臂70、7 1之連動·連結點互相 配置於近的位置，由而可以縮小氣缸頭4 1之寬度。 再者，該吸氣口 56及排氣口 57之一方之吸氣口 56係在 於直交於凸輪軸68之軸線之平面之投影圖上而至少該凸輪 軸68之一部份會疊合狀地，且從凸輪軸68之軸方向一端而 離開之位置地設置於氣缸頭4 1。所以更能使凸輪軸6 8配 置於更接近於燃燒室5 5側之位置，由而在於沿著氣缸軸線 之方向地更能氣缸頭4 1小型化。 -24- (21) (21)200403385 並且在於與凸輪軸68之軸線平行之一直線上，配置了 該吸氣口 56及排氣口 57之對於燃燒室55之開口端，所以得 於在燃燒室5 5內發生漩渦，以資提高燃燒效率。 再者將該對於共同地包含吸氣閥58及排氣閥59之軸線 之平面P1具有呈顯銳角α之軸線之點火塞76安裝於氣缸頭 4 1。 所以可以避免在於點火塞76之周圍配置吸氣閥58及排 氣閥59之關連之零件，由而可以確保充分之空白空間，由 而使點火塞7 6容易受到冷卻風。可以做到點火塞7 6之有效 率的冷卻。 又，對應於凸輪軸68之第1組配用開口部87，及對應 於搖桿軸69之第2組配用開口部98乃互相獨立地設置於氣 缸頭41之一側壁，閉合第2組配用開口部98之第2蓋構件 9 9係被阻止其軸方向內方之移動地嵌合於第2組配用開口 部98，而第1蓋構件88係卡合於第2蓋構件99之外面地 ，例如以螺合而固定於氣缸頭4 1。 所以第2蓋構件99乃不需要在於第2組配用開口部98 之周圍確保爲了將它安裝於氣缸頭41之空間，於是藉由較 小地設定凸輪軸68與搖桿軸69之軸間距離由而對於氣缸頭 4 1之小型化有所貢獻。 並且由氣缸頭41之一側，同一方向地可以實施：爲了 組配凸輪軸68用之第2支承凹部95及第2支承孔96之孔加工 ，所以不需要煩雜之作業，充分的可以提高加工精度，減 少加工工數。 -25- (22) (22)200403385 再者，對於排氣口 5 7供給二次空氣之一次空氣供給部 107乃連接於設在引擎主體38之頭蓋42之簧片閥105 ’而該 二次空氣供給管107之一部份係由其外面曝曬於外氣狀， 兩端連接於引擎主體38之二次空氣供給管1 17所形成。 因此藉由空氣冷卻二次空氣供給管1 1 7 ’而可以抑制 熱之傳遞於簧片閥1 〇 5側。所以藉由將簧片閥1 0 5設置於頭 蓋42，由而一方面縮短簧片閥1〇5與排氣口 57間之二次空 氣供給管107之長度，雖然引擎E係氣冷式仍然可以減少熱 之對於簧片閥105之不良影響也° 並且二次空氣供給管1 1 7之兩端係挾持於互相結合之 氣缸頭4 1與頭蓋42之間者，所以不需要將二次空氣供給管 117 連接於引擎主體38用之扣帶或挾子等之連接構件， 由而達成減少零件件數及減低組配用工數，由而減低成本 ，並且不須考慮配置連接用零件之空間，由而增大設計自 由度。 又，在於二次空氣供給管117之兩端外面，與頭蓋42 及氣缸頭4 1之間分別介裝有Ο形環1 1 8、1 1 9，所以不需要 提高二次空氣供給管1 1 7之兩端之加工精度，利用〇形環 118、119之彈撥力而可以提高二次空氣供給管117之兩端 對於頭蓋42及氣缸頭4 1之連接部之封密性。可以減少加工 工數而減低成本，且與使用扣帶或挾子者等之連接構件時 相比組裝作業更爲容易。 並且引擎主體38係使二次空氣供給管1 17面臨於行走 方向前方側之姿勢地載置於機車。所以得由機車行走時之 r r r -26- (23) (23)200403385 行走風而更有效果的冷卻該二次空氣供給管也。 又，引擎主體38係，一方面將簧片閥105面臨於機車 之行走方向前方，同時將該連結簧片閥105與二次空氣供 給管117間而設於頭蓋42之第1通路部107a係面臨於機車之 行走方向之前方狀之姿勢地載置於機車，所以藉由行走風 之冷卻效果而更可以減少由熱所致之不良之影響之波及於 簧片閥105也。 再者，包含引擎E，及變速該引擎E之輸出而傳達於 後輪WR之動力傳達裝置T之動力組成P之前部乃，介著防 振連桿188而上下擺動自如地支承於車體台架15。而在於 該防振連桿1 8 8設有，彈撥地接觸於設置於車體台架1 5之 被抵接體200以資限制動力組成P之上下擺動範圍之擋止器 橡膠199，在於動力組成P之上部及車體台架15間，設置有 容許動力組成P之上下擺動，且連結動力組成P與車體台架 1 5之非伸縮性之支承構件20 1。 所以替代先前之後緩衝器，而以非伸縮性之支承構件 201而將動力組成P支承於車體台架15，由而可以達成小型 化、輕量化以及低成本化。並且動力組成P之上下擺動範 圍乃由彈撥性地接觸於車體台架1 5側之被抵接體200之擋 止器橡膠199之撓變量所決定，所以得將動力組成P之上下 擺動範圍限定於比較狹窄之範圍由而提高空間效率。使車 體台架1 5側及動力組成P側均可以使內外裝用零件之配置 之設計容易化，增大包含新式樣設計之各設計之自由度。 再者，在於後輪WR之前方，由支承構件201來連結動 -27- (24) (24)200403385 力組成P之上部與車體台架1 5之後部，所以可以縮短支承 構件20 1，更可以達成輕量化以及低成本化，並且支承構 件201之一端係連結於：其兩端固著於椅柱18之支承支柱 2 8，及分別連結於支承支柱2 8之左右兩側及椅柱1 8間狀地 從椅柱1 8而朝後方上方地延伸之補強構件2 9，.........之一 方之間之托架2 03，所以雖然簡單的構造仍然可以牢固地 支承動力組成P也。 再者，做爲本發明之第2 實施例而如第13圖所示， 將支承構件2 0 1 ’形成爲中空之筒狀亦可以。如此就更能使 將動力組成P支承於車體台架5之構造更能輕量化及低成本 化也。 又，做爲本發明之第3實施例而如第1 4圖所示，對 於固著於椅柱18之托架203’，連結支承構件201或201’也 可以。如此方式即得以簡單的構造而能牢固地支承動力組 成P也。 上面具體的說明了本發明之實施例，惟本發明並不侷 限於上述實施例，不逸脫記述於申請專利範圍之本發明地 仍然可以實施種種之設計之變更也。 (發明之效果） 依上述申請專利範圍第1項所述之發明時，得將吸氣 閥及排氣閥與吸氣側及排氣側搖臂之連動·連結點互相配 置於近的位置而可以使氣缸頭之寬度窄狹化，並且將凸輪 軸更接近於燃燒室側地予以配置，由而在於沿著氣缸軸線 (25) (25)200403385 之方向地更能使氣缸頭小型化也。 依上述申請專利範圍第2項所述之發明時，在於燃燒 室內發生漩渦而提高燃燒效率也。 依申請專利範圍第3項所述之發明诗，在於點火塞之 周圍可以避免配置關於吸氣閥及排氣閥之零件，由#司* & 確保充分之空白空間，由而使冷卻風容易接觸於點X _， 而可以達成點火塞之有效率的冷卻。 再者，依上述申請專利範圍第4項所述之發明時，在 於沿著搖桿軸之軸線之方向而可以使氣缸頭更爲小型化也 【圖式簡單說明】 第1圖係第1實施例之機車之側面圖。 第2圖係沿第1圖之2 - 2線之機車之後部橫斷平面圖。 第3圖係機車之後部放大側面圖。 第4圖係第3圖之4-4線剖面圖。 第5圖係第4圖之前部放大圖。 第6圖係引擎主體之前部放大切開側面圖。乃第7圖之 沿6 · 6線之剖面圖。 第7圖係第6圖之7-7線之剖面圖。 第8圖係第7圖之8-8線之剖面圖。 第9圖係第5圖之要部放大圖。 第10圖係第4圖之後部放大圖。 第1 1圖係第3圖之1 1 · 1 1線放大剖面圖。 ms -29- (26) (26)200403385 第1 2圖係第3圖之1 2 -1 2線剖面圖。 第1 3圖係第2實施例之對應於第1 2圖之剖面圖。 第1 4圖係第3實施例之對應於第1 2圖之剖面圖。 【符號說明】 15 車體台架 16 頭管 17 主機架 18 椅柱 19 前叉 2 0 操向把手 21 煞車桿 22 平衡器 23 貨籃支承構件 24 貨籃 25 頭燈 ' 26 座椅 27 座椅支承管 28 支承支柱 29 補強構件 30 燃燒箱 3 1 電子控制組成 3 2 後方向燈 3 3 尾燈 -30- (27)200403385 34 曲柄型腳踏板 3 7 曲柄軸 3 8 引擎主體 3 9 機匣 4 0 氣紅 4 1 缸頭The present invention relates to a cylinder head provided with an intake port and an exhaust port which can be communicated with a combustion chamber, and provided with a linear opening and closing operation for opening and closing the intake and exhaust ports, respectively. An intake valve and an exhaust valve on the cylinder head, and a camshaft rotatably supported on the cylinder head, and an intake side rocker interposed between the camshaft and the intake valve and the exhaust valve, respectively Arm and exhaust side rocker. The camshaft system is arranged closer to the engine of the combustion chamber than the suction valve and the exhaust valve are linked to the suction side and the exhaust side rocker, and the connection point is closer to the combustion chamber. [Prior Art] Such engines are conventionally known, for example, in Japanese Patent Publication Shikaihei 3 -321 04. In this type of engine, since the camshaft is arranged closer to the combustion chamber than the linkage connection point between the intake valve and the exhaust valve and the intake side exhaust side rocker, the cylinder head can be positioned along the cylinder axis Direction and miniaturization. [Summary of the Invention] However, according to the former, the suction valve and the exhaust valve are respectively arranged in a V shape on the left and right sides of the camshaft. Therefore, the suction valve and the exhaust valve are connected to the suction side and the exhaust side of the swing arm. Interlocking, the connecting points are separated from each other, causing the width of the cylinder head to become larger. -5- (2) (2) 200403385 The present invention was created in view of the above circumstances, and provides a cylinder head that can be narrowed in width on the one hand, and the cylinder head can be made smaller in the direction along the cylinder axis. Engine for the purpose. In order to achieve the above-mentioned object, the invention of the scope of patent application No. 1 is that it is provided with a cylinder head provided with an intake port and an exhaust port which can be connected to the combustion chamber, and opened and closed the intake and exhaust ports, respectively. The linear opening and closing operation can be performed, and the intake valve and exhaust valve arranged on the cylinder head, and the cam shaft that is rotatably supported on the cylinder head, and the cam shaft and the intake valve and The camshaft system is arranged on the suction-side rocker arm and the exhaust-side rocker arm between the exhaust valves, and is connected to the suction-side and exhaust-side rockers in conjunction with the suction valve and the exhaust valve. In the engine close to the combustion chamber, the intake valve and the exhaust valve are arranged in parallel with the opening and closing operation directions on the cylinder head, and a specific port system of one of the intake port and the exhaust port is The projection of the plane orthogonal to the axis of the camshaft is provided on the above-mentioned cylinder head so as to be superimposed on at least a part of the camshaft at a position separated from one end in the axial direction of the upper camshaft. feature. According to the structure of the invention described in item 1 of the aforementioned patent application scope, the opening and closing directions of the suction valve and the exhaust valve are parallel to each other, and because the suction valve and the exhaust valve must be connected to the suction valve side and the exhaust Linkage of the valve side rocker. The connection points are arranged close to each other to narrow the width of the cylinder head. And it lies on a projection plane orthogonal to the axis of the camshaft, at least partially overlapping the camshaft, and at a position separated from one end in the axial direction of the camshaft. Since one of the intake port and the exhaust port is provided on the cylinder head, it is necessary to arrange the camshaft closer to the combustion chamber side. As a result, the cylinder head can be miniaturized along the direction of the cylinder axis. In addition, the invention described in item 2 of the scope of patent application of the present invention is in addition to the structure of item 1 of the scope of patent application, in addition, the above-mentioned specific port is the suction port 'the suction port and the exhaust port to the combustion chamber. The open end is characterized by being disposed on a straight line parallel to the axis of the camshaft. In this configuration, the combustion chamber is vortexed to improve the combustion efficiency. The invention described in item 3 of the scope of patent application is the structure of the invention described in item 1 or 2 of the scope of patent application, plus a plane having: for the plane that collectively includes the above-mentioned suction valve and exhaust valve axis The characteristic of the ignition plug forming the axis of the acute angle is that it is installed on the cylinder head. According to this structure, it can be avoided that the parts about the intake valve and the exhaust valve are arranged near the ignition plug, and a sufficient empty space can be ensured. Space, so that the ignition plug fully obtains cooling air and effectively cools the ignition plug. Furthermore, the invention in the fourth scope of the patent application is based on the structure of the invention described in the second scope of the patent application, and the intake port system supports the intake side swing arm and the exhaust side swing in common. It is characteristic that the rocker shaft of the arm is arranged on the cylinder head in a cross shape on a projection view of a plane orthogonal to the cylinder axis (C). With this structure, the cylinder head can be downsized along the axis of the rocker shaft. [Embodiment] The following describes the embodiment of the present invention with reference to the embodiment of the present invention as shown in the accompanying drawings. (4) (4) 200403385 Application form. 1 to 12 show a first embodiment of the present invention. Fig. 1 is a side view of the locomotive of the first embodiment. Figure 2 is a cross-sectional plan view of the rear portion of the locomotive along line 2-2 of Figure 1. Figure 3 is an enlarged side view of the rear portion of the locomotive. Figure 4 is a sectional view taken along line 4-4 of Figure 3. Figure 5 is an enlarged front view of Figure 4. Figure 6 is an enlarged cut-away side view of the front of the engine body. It is a sectional view taken along line 6-6 in FIG. 7. Figure 7 is a sectional view taken along line 7-7 in Figure 6. Fig. 8 is a sectional view taken along line 8-8 in Fig. 7; FIG. 9 is an enlarged view of a main part of FIG. 5. Figure 10 is an enlarged view of the rear part of Figure 4. Fig. 11 is an enlarged sectional view taken along line 11-1 of Fig. 3; Figure 12 is a sectional view taken along line 12-12 in Figure 3. Firstly, in the first figure, a body frame 15 of a locomotive with a foot pedal is provided. The front end is provided with a head tube 16 and a main frame 17 which is inclined low in the rear direction and is integrally connected to the main frame. The rear part of the frame 17 extends above the chair post 18, and is formed into a slightly U-shaped opening that opens to the front, and the two ends are fixed to the support posts 28 of the chair post 18, and the support posts 28 are respectively connected. . . . . . . . . The left and right sides and the chair post 18 extend from the chair post 18 to the rearwardly rising supplementary member 29. . . . . . . . . . A front fork 19 is supported on the head pipe 16 in a freely operable manner, and a front wheel WF is pivotally supported at the lower end of the front fork 19. A lever-shaped steering handle 20 is provided on the upper end of the front fork 19. In other words, the front fork 19 and the steering handle 20 are supported by the head pipe 16 in the direction possible. The brake levers 21 are provided at the left and right ends of the steering handle 20, respectively. These brake levers 21, . . . . . . . . The operating force is input to the balancer 22 arranged in front of the head pipe 16 and supported by the head pipe 16 ° The balance -8-Γ (5) (5) 200403385 The device 22 is configured regardless of the operation Brake lever 21 ,. . . . . . . . . Both can be configured to transmit the brake operation force to the front wheel brake BF 'mounted on the front wheel WF and the rear wheel brake BR mounted to the rear wheel WR. In addition, a basket support member 23 provided between the upper part of the front fork 19 and the steering handle 20 is supported, and is arranged below the steering basket 20 and the head tube 16, and below the basket 24. Headlight 25. Refer to Figure 2 and Figure 3 at a glance. On the seat post 18, a seat support tube 27 having a saddle-shaped seat 26 for the driver's seat on the upper end is inserted from above, and the seat support tube 27 is fixed to the chair freely to adjust the up-down position Column 1 8. A fuel tank 30 is arranged on the upper and lower support pillars 28 and is arranged at an obliquely lower position behind the upper and lower seats 26, and the fuel tank 30 is installed below the fuel tank 30 to control the engine mounted on the vehicle body rack 15 The electronic control component 3 of the E operation is provided at the rear of the support pillar 28, and a pair of left and right rear direction indicators 3 2 and 3 2 are installed, and rear direction indicators 3 2 and 3 2 are arranged between these rear direction indicators 3 3. In Figure 4, the engine E is a single-cylinder air-cooled engine having a crankshaft 37 extending in the left-right direction of the body frame 15. The engine body 38 is provided with a casing 39 that rotatably supports a crank shaft 37, and a cylinder axis C that is slightly extended from the casing 39 in the front raising direction and is connected to the cylinder block 40 of the casing 39 And a cylinder head 41 coupled to the cylinder block 40, and a head cover 42 coupled to the cylinder block 41 on the opposite side of the cylinder block 40, and a plurality of pieces of cooling are protruded from the outer surfaces of the cylinder block 40 and the cylinder head 41, respectively. Heat sink 40a '. . . . . . . . . 4 1 a 5. . . . . . . . . . (6) (6) 200303385 A piston 44 slidably fitted in a cylinder bore 43 provided in a cylinder block 40 is connected to a crank shaft 37 via a connecting rod 45 and a crank tip 46. The crank shaft 37 is rotatably supported by the case 39 via the ball bearings 47 and 48. The crank shaft 37 is located outside the one ball bearing 4 7 and includes a mounting ring between the crank shaft 37 and the case 39.状 的 封 封 件 49。 The shape of the sealed member 49. In addition, an AC generator 52 is formed at one end of the crank shaft 37 along the right side of the locomotive in a projecting manner from the casing 39 and fixed to the rotor 50 at one end of the crank shaft 37 and the stator 51 housed in the rotor 50. . The AC generator 52 is covered with the casing 39 and the right hood 53 of the cylinder block 40. The stator 51 is fixed to the casing 39. Refer to Figures 5 to 8 at a glance. The cylinder head 41 is provided adjacent to the top of the piston 44 and is formed between the cylinder block 40 and the cylinder head 41. The cylinder head 41 can communicate with the intake port 56 and the exhaust port 57 of the combustion chamber 55. At the same time, an intake valve 58 and an exhaust valve 59 which respectively open and close the above-mentioned intake port 56 and exhaust port 57 are provided. The intake valve 58 and the exhaust valve 59 are provided by a guide cylinder 60 provided at the cylinder head 41, 6 1 Opens and closes the guided straight line. Valve springs 64 and 65 are respectively provided between the retainers 62 and 63 and the cylinder head 41 provided at the ends of the intake valve 58 and the exhaust valve 59 of the guide cylinders 60 and 61, respectively. The intake valve 58 and the exhaust valve 59 are respectively spring-biased in the direction of the gate valve by springs 64 and 65, respectively. And each of the guide cylinders 60 and 61 mentioned above, the plane P1 which collectively includes these guide cylinders, 61 and the plane ryr including the axis of the crank shaft 37 and the cylinder axis C: 10- (7) (7) 200403385 plane P2 The cylinder head 41 is arranged at an acute angle so as to intersect with each other, and has an axis which is parallel to each other and rises forward. Thus, the intake valve 58 and the exhaust valve 59 are arranged on the cylinder head 41 in a manner that they can open and close in parallel with each other. A moving valve chamber 66 is formed between the cylinder head 41 and the head cover 42. Opening and closing driving The above-mentioned moving valve device 67 for the intake valve 58 and the exhaust valve 59 which are spring-biased in the valve closing direction are housed in the moving valve chamber 66. The valve valve device 67 includes a cam shaft 68 having an axis parallel to the crank shaft 37 and rotatably supported by the cylinder head 41, and a rocker having an axis parallel to the cam shaft 68 and fixedly supported by the cylinder head 41. A shaft 69 (rocker arm shaft), and an intake-side rocker arm 70 swingably supported by the rocker shaft 69 and interposed between the cam shaft 68 and the intake valve 58, and swinging with the intake side The arm 70 is an exhaust-side rocker arm 71 that is rotatably supported by the rocker shaft 69 and is interposed between the cam shaft 68 and the exhaust valve 59. The camshaft 68 is provided with an intake-side cam 72 and an exhaust-side cam 73, respectively. A cam slider 70a slidingly connected to the intake-side cam 72 is provided at one end, and the other end of the intake-side rocker arm 70 is screwed together to adjust its advancing and retracting position, and abuts against the end of the intake valve 58.部 之 挺杆 拳 74。 74. In addition, one end of the exhaust side rocker arm 7 1 is provided with a cam slider 7 1 a slidingly contacting the exhaust cam 73, and the other end portion thereof is screwed into contact with the exhaust valve 5 so as to adjust its advance and retreat position. 9 of the end of the tappet bolt 7 5. The cam shaft 68 is arranged at a ratio of the linkage and connection points between the intake and exhaust rocker arms 70 and 7 1 and the intake valve 58 and the exhaust valve 59. In other words, it is located closer to the combustion chamber 55 than the contact point of the intake valve 58 and the exhaust valve 59 of the tappet bolts 74 and 75. In this embodiment, a camshaft 68 is disposed above the air intake valve 58 and the exhaust valve 59 (8) (8) 200403385. In addition, the suction port 56 is located on a projection (refer to FIG. 8) orthogonal to the axis of the camshaft 68, and is superimposed on at least a part of the camshaft 68 (a part of the figure shown in this embodiment). It is placed at a position away from one end in the axial direction of the camshaft 68, and at the same time, it is on a projection (see Fig. 7) of a plane orthogonal to the cylinder axis c, that is, it is arranged on the cylinder head in a cross shape with the camshaft 69 4 1. The open ends of the intake port 5 6 and the exhaust port 5 7 with respect to the combustion chamber 55 are shown in Fig. 7 and are arranged on a straight line parallel to the axes of the cam shaft 68 and the rocker shaft 69. The outer end of the suction port 56 is open to the upper side wall of the cylinder head 41, and the outer end of the exhaust port 57 is open to the lower side wall of the cylinder head 41. The ignition plug 76, which includes the plane P1 having the axis of the intake valve 58 and the exhaust valve 59 in common and forms an acute angle α, is mounted on the cylinder head 4 Γ facing the combustion chamber 55. Between the camshaft 68 and the crankshaft 37, a timing transmission mechanism 77 (time-adjusting transmission mechanism 77) for transmitting a reduction ratio of 1/2 of the rotational power of the crankshaft 37 to the camshaft 68 is provided. The timing transmission mechanism 77 includes a driving sprocket 78 fixed to the crank shaft 37 and a passive sprocket 79 fixed to the other end of the cam shaft 68 than the ball bearing 48. Roller An endless chain 80 for driving and driven sprocket 78,79. A portion from the casing 39 through the cylinder block 40 and the cylinder head 41 to the head cover 42 is a cam chain chamber 8 1 formed on the engine body 38 so that the cam chain 80 can move. In FIG. 9, the cylinder The head 41 is coaxially arranged: a first supporting recess 82 ′ for receiving a circular end of the cam shaft 68 and a first supporting recess 82 ′ for receiving -12-(9) (9) 200403385 Hole 83 ° The first support hole 83 is formed so as to be able to be inserted therethrough, and is provided to a large diameter of the intake-side cam 72 and the exhaust-side cam 73 of the cam shaft 68. A ball bearing 84 is interposed between the inner surface of the first support recess 82 and the outer surface of one end portion of the cam shaft 68 '. A ball bearing 85 is also interposed between the inner surface of the first support hole 83 and the outer surface of the other end side of the cam shaft 68, and the other end of the cam shaft 68 outside the ball bearing 85 is provided with a plurality of bolts 86. . . . . . . . . . The passive sprocket 79 is fixed to the same axis. One of the side walls of the cylinder head 41 (in the present embodiment is in a state of moving toward the locomotive, but on the left side wall of the cylinder head 41) is provided, and the camshafts 68 are assembled from the left side wall to the cylinder. At the same time, the first set of matching openings 87 for the above-mentioned passive sprocket 79 can be installed on the cam shaft 68. The opening portion 87 is provided with a diameter larger than that of the first support hole 83. The first pair of opening portions 87 is closed by a first cover member 88. The first screw 88 is fixed to the cylinder head 41 by screwing the female screw teeth 89 provided in the first pair of matching openings 87 at the outer end of the first pair of matching openings 87 and the first cover member 88. A ring-shaped sealing member 90 will be placed in between. Further, on the outer surface of the first cover member 88, an engagement groove 91 for an engaging tool is formed along a diameter line when the first cover member 88 is to be rotated. Furthermore, the inner surface of the first cover member 88 is provided with a restricting convex portion 92 protruding from the side of the passive sprocket 7-9. As the passive sprocket 79 slides on the restricting convex portion 92, it can be prevented. The camshaft 68 is pulled out from the opening portion 87 side of the first group. -13- (10) (10) 200403385 It is coaxially provided on the cylinder head 41, and the second second support recess 95 for circularly supporting and fitting to one end of the rocker shaft 69 is inserted into the rocker shaft. 69 is a second support hole 96 supported at the other end. The cylinder head 41 and the rocker shaft 69 corresponding to the part of the second support hole 96 are screwed with bolts 9. 7. The rocker shaft 69 can be fixedly supported on the cylinder head 41. The left side wall of the cylinder head 41 is provided with a diameter substantially the same as the diameter of the second support hole 96. The rocker shaft 69 group can be arranged in the second group for the cylinder 41 from the left wall side. Matching openings 98, 2nd group Matching openings 98 are closed with a second cover member 99, and the second cover member 99 is air-tightly fitted to the second group to prevent movement inward in the axial direction.配 用 口 部 98。 With openings 98. In other words, the second cover member 99 is provided on its outer end with a flange portion 99a engaged with the peripheral edge of the outer end of the second set of openings 98, and after the ring-shaped sealing member 100 is mounted on its outer periphery, Fit to the second set of openings 9 8. Further, the flange portion 99a is provided with a cut-out portion 99b for a part of the first cover member 88 that can be engaged with the second cover member 99 from the outer side. Then, after the second cover member 99 is fitted into the second group matching opening portion 98, the first group matching opening portion 87 is screwed into the first cover member 88, and the first cover member 88 is fixed to the cylinder head 41. At the same time, the second head member 99 is fixed to the cylinder head 41. An air inlet 101, which is open on the side of the upper part of the cylinder head 41, is connected via the gasifier 102, and an air filter 101 supported by the power component P is arranged above the power component P. It is also connected to the exhaust port 5 7 and -14 which are open at the side of the lower part of the cylinder head 41. (11) (11) 200403385 The rear end of the exhaust pipe 103 extending to the rear side is connected to the rear wheel WR. Exhaust muffler 104 on the right. For those who will supply exhaust air purification secondary air to the exhaust ports 57, a reed valve 105 is provided on the right front part of the head cover 42 of the engine body 38, and the upstream side of the reed valve 105 is connected A hose (not shown) is connected to the air filter 1 〇1, and the downstream side of the reed valve 105 is connected to the exhaust port 57 through a secondary air supply path. The valve housing 108 of the reed valve 105 is composed of a housing main portion 109 'provided integrally with the head cover 42 and a cover 110 fixed to the housing main portion 109. Between the housing main portion 109 and the cover 110, the inside of the valve housing 108 is divided into an upstream chamber 1 1 1 on the upstream side of the cover 1 10 side and a downstream chamber 1 on the 10 9 side of the housing main portion. 1 2 The valve seat plate 1 1 3. The valve seat plate 1 1 3 is provided with a valve hole 11 4 connecting the upstream chamber Π 1 and the downstream chamber 1 12. The part facing the downstream side 1 1 2 of the valve seat plate Η 3 facing the valve hole 1 1 4 is fixed with a common lock, and a space is provided from the valve seat plate 1 1 3 The stopper plate 1 1 5 and the above-mentioned valve hole 1 1 4 can abut one end of the reed 1 1 6 of the valve seat plate 1 1 3. The downstream end of a hose (not shown) is integrally provided on the connecting pipe portion 110a of the cover 110, and the upstream end of the hose is connected to the air filter 101. The secondary air supply path 107 connects the first passage portion 107 a provided in the head cover 42 to the downstream chamber 112 and the second passage portion 107 b provided in the cylinder head 41 to the exhaust port 57. A secondary air supply path μ 7 whose outside is exposed to outside air is constituted. In other words, a part of the secondary air supply path -15 · (12) (12) 200403385 1 07 is formed by the above-mentioned secondary air supply path 1 17. A portion 41 'of the cylinder head 41 among the portions forming the exhaust port 57 is formed with a protruding portion 41b protruding downward. Corresponding to the protruding portion 4 1 b of the cylinder head 41, the lower portion of the head cover 42 is formed to project downward from the side surface of the head cover 4 2 of the cylinder head 41. A first passage portion 107a is formed on the head cover 42. The first passage portion 107a communicates the upstream end with the downstream chamber of the reed valve 105, and the downstream end faces the cylinder head 41. The projection 41b is opened. The second passage portion 107b is formed to open the upstream end of the first passage portion 107a downstream of the first passage portion 107a, and at the same time, the downstream end is opened to the exhaust port 57 in the cylinder head 41. The above-mentioned protruding portion 4 1 b 〇 The secondary air supply path 117 is held between the above-mentioned protruding portion 4 lb of the cylinder head 41 and the lower portion of the head cover 42. Both ends of the secondary air supply pipe 1 17 are fitted to the downstream opening portion of the first passage portion 107a and the upstream end opening portion of the second passage portion 107a. It is outside the two ends of the secondary air supply pipe 1 1 7 and between the head cover 42 and the cylinder head 41 of the engine body 3 8, in other words, the inner surface of the downstream end opening of the first passage portion 107 a and the upstream opening of the second passage portion 107 b O-rings 1 18 and 1 19 are respectively interposed between the inner surfaces of the part. The two ends of the secondary air supply pipe 1 1 7 are respectively formed with enlarged diameter portions 1 1 7a and 1 17b for holding the above-mentioned O-rings 1 1 8 and 1 19 between the head cover 42 and the cylinder head 41. According to the engine main body 38, the secondary air supply pipe 1 17 is faced in front of the running direction of the locomotive, and the reed valve 105 is connected to connect the reed valve 105 and the secondary air supply pipe] 17. No. 42 in the head cover! Tong -16-(13) (13) 200403385 The road section 107a is placed on the locomotive in a posture facing the direction of travel of the locomotive. In order for the walking wind to effectively contact the secondary air supply pipe 1 1 7, in this embodiment, the secondary air supply pipe 1 1 7 is arranged below the front part of the engine body 38 and the engine body is placed on the vehicle body. The rack 15 also. As shown in FIGS. 4 and 5, a casing 39 of an oil pump 123 for pumping oil from the lower portion of the casing 39 is coupled to the casing 39 near the ball bearing 48. The driven gear 126 integrally provided with the input shaft 125 of the oil pump 123 will mesh with the drive gear 127 integrally provided with the drive sprocket 78 of the timing transmission mechanism 77 described above. In other words, the oil pump 123 performs a pumping operation in response to the rotation of the crank shaft 37. Here, the outlet 128 of the oil pump 123 is communicated, and the (machine) oil passage 129 is connected from the casing 39 through the cylinder block 40 and the cylinder head 41 to the head cover 42. In order to lubricate between the rocker shaft 69 and the suction-side and exhaust-side rocker arms 70 and 71, the cylinder head 41 and the rocker shaft 69 will be provided with a path 1 3 0, which passes through the (oil) oil passage 129, 1 3 1. In addition, the head cover 42 can be connected to the downstream end of the (machine) oil passage 129, and is provided with suction-side and exhaust-side cams 72 and 73 and suction-side and exhaust-side rocker arms 70 and 71. The cam slider 70a, 71 a of the sliding contact portion and the plurality of oil spray holes 132 for spraying oil, . . . . . . . . . Further, a temperature sensor 1 3 3 is installed on the head cover 42 facing the downstream portion of the oil passage 129, and detects the temperature of the oil as a temperature representing the engine temperature, which is the first cover member. On the rear side, the cylinder block 40 is detachably provided with an oil supply cap 1 3 4 for supplying engine oil in the casing 39. -17- (14) (14) 200403385 Referring to FIG. 10, the power transmission device T is equipped with a V-belt type automatic transmission 135 that automatically and steplessly shifts the power output from the crank shaft 37, and A reduction gear train 136 is provided between the V-belt type automatic transmission 135 and the axle 137 of the rear wheel WR. The housing 138 of the power transmission device T is composed of: a housing body 39 and a cylinder block 40 which are coupled to the left side of the locomotive in the direction of travel of the locomotive, and extend to the left side of the rear body WR of the housing main body 1 3 9; The left side of the case body 1 39 is connected to the left case 140 of the case body 139, and the right side case 1 41 is connected to the right side of the case body 1 39 to cover the rear part of the case body. The first transmission chamber 142 is formed between the case main body 139 and the left side case 140, and the second transmission chamber 143 is formed between the rear portion of the case main body 139 and the right side case 141, and is located on the case main body 139. A cylindrical bearing housing 144 is integrally provided and supports the input shaft 125 of the oil pump 123 rotatably in cooperation with the oil pump housing 124. The passive gear 126 provided on the input shaft 125 is held between the oil pump case 124 and the bearing case 144. The V-belt type automatic transmission 135 is housed in the first transmission room 142. It is provided with a drive belt box 145 'mounted on the other end of the crank shaft 37 and a driven (driven) shaft having an axis parallel to the crank shaft 37 and rotatably supported by the case body 139 and the right case 141 146, and a passive pulley 147 mounted on the driven (driven) shaft 146 to hang on the endless V-belt 148 of the driving pulley 145 and the passive pulley 147. The driving pulley 145 is a fixed pulley half 149 fixed to the other end of the crank shaft 37, and the fixed pulley half 149 can be approached. -18- (15) (15) 200403385 to leave and slide Possibly supported by the movable pulley half 150 on the crank shaft 37, and exerts the movable pulley half 1 50 on the fixed pulley half 1 4 9 side as the rotation number of the crank shaft 37 increases. The power of Lixin is composed of 151. The driven shaft 146 is rotatably supported by the right case 141 and the case main body 139 via ball bearings 152 and 153. The driven (pulled) pulley 147 is composed of: a fixed pulley half 1 5 4 which can be supported by the (driven) shaft 146 with a certain relative position in the axial direction, and a fixed pulley half 1 54 may approach and leave the ground, and is supported on the fixed pulley half 154 by sliding and rotating relatively freely. At the same time, a movable pulley half 155 spring-pulled toward the side of the fixed pulley half 154 is formed. And between the fixed pulley half 154 and the driven (driven) shaft 146, a connection between the fixed pulley half 154 and the driven (driven) shaft 146 is provided as the number of rotations of the fixed pulley half 154 increases. Of centrifugal clutch 156. The reduction gear train 136 is housed in the second transmission chamber 143. By: Both ends are rotatably supported on the intermediate shaft 159 of the right case 1 41 and the case body 1 39, and the first gear 160 provided on the driven (driven) shaft 146, and the first gear 160 is meshed with the first The gear 160 includes a second gear 161 provided on the intermediate shaft 159, a third gear 162 provided on the intermediate shaft 159, and a fourth gear 163 meshed with the third gear 162. A first one-way clutch 164 is interposed between the axle 137 of the rear wheel WR and the fourth gear 163. Press the right side wall of the case 39 when the direction of the locomotive is in the forward direction. The axle support member 165 extends to the right of the rear wheel WR. (16) (16) 200403385 The axle 137 of the rear wheel WR is rotatably supported by a support tube portion 166 provided at the rear portion of the axle support member 165, a right case M1 of a case 138 of the power transmission device T, and The casing body 139 of the casing 138. In other words, the axle 137 is rotatably penetrated through the support tube portion 166 and the right case 141 and protrudes into the second transmission chamber 143. A ball bearing 1 67 is interposed between the support cylinder 166 and the axle 1 3 7, a ball bearing 168 is interposed between the right case 1 4 1 and the axle 137, and a ball bearing 157 is interposed between the housing main body 139 and the axle 137. and also. A sprocket 170 is mounted on the protruding end of the axle 137 outside the support cylinder 166 via a second one-way clutch. In FIG. 11, the rear side of the main frame 17 of the vehicle body frame 15 is fixed with a pair of left and right rack side brackets 1 7 1 and 1 7 1 ° which are located on the two side racks. The support cylinders 1 72 between the frames 1 7 1 and 1 71 are rotatably supported via ball bearings 174 and 174, and have pedals running parallel to the axle 137 of the rear wheel WR and penetrating the support cylinder 172. Both ends of the plate shaft 173, and both ends of the foot pedal shaft 173 protruding from the support cylinder 172 will be fixed to the crank-type foot pedal 34 ,. . . . . . . . . . Between the crank-type foot pedal 34 on the right side and the above-mentioned support cylinder 172, a sprocket 175 is fixedly driven to the pedal shaft 173. Also disposed below the axle 137 is a support arm 176 supported on the axle support member 165 rotatably supported by an axis parallel to the axle 137 as the center, and on this support arm 176, A pair of sprocket wheels 1 7 7 and 17 8 can be rotatably supported. Therefore, for the driving sprocket 175 and the 137 side of the axle -20- (17) (17) 200403385 (drive) driving sprocket 170 'And the two endless chain 179 are erected on the two sprocket wheels 177 and 178, and the support arm 176 is spring-pulled in a direction to tension the chain 179. A chain cover 180 which covers the above-mentioned chain 179 on the outside is supported on the vehicle body frame 15. In detail, the axle 137 of the rear wheel WR can transmit the power from the engine E through the power transmission device T. At the same time, the power generated by the pedal crank 34 can also be transmitted. By the function of the first and second one-way clutches 164, 169, the power from the engine E and the pedal 34, . . . . . . . . Among the powers, a power system with a high number of rotations can be transmitted to the axle 137. However, when the load required to rotate the rear wheel WR such as climbing a hill is changed, the engine E and the pedal 34 are required. . . . . . . . . Both sides transmit power to the axle 137 as well. The brake BR for rear wheels includes a drum-type brake that is fixed to a brake drum 182 of an axle cylinder 181 of the axle 137 and cannot be relatively rotated. The rear wheel WR is fixed to the brake drum 182. Hub 183, coaxially surrounding the rim 184 of the hub 183, and the tire 185 mounted on the rim 184, and a plurality of steel wire spokes 186 provided between the hub 183 and the rim 184, . . . . . . . . Made up. The hub 183 is composed of a cylindrical portion 183a fixed to the outer periphery of the brake drum 182 by welding, and flanges 183b and 183b integrally provided on one pair of both ends of the cylindrical portion 183. The two flanges i83b and 183b are respectively provided for engaging the respective steel spokes 186b. . . . . . . . . Plural connection of inner ends 端 L 1 8 7 (18) (18) 200403385 As described above, the plurality of steel wire spokes 1 86 are integrally connected; . . . . . . . One of the results of forming the hub 183 with one pair of flanges 183b and 183b can be eliminated when compared with the case where the hub is composed of a plurality of members, and the occurrence of rust caused by the infiltration of water into the joint surfaces of the plurality of members Problem. And the hub U3 is made by one-piece molding. Therefore, the welding mold when the two flanges 183b and 183b are welded to the brake drum 1 8 2 is only required for the positioning of the hub 1 8 3. Therefore, the number of processing is small It can be done. And because the hub 1 8 3 is integrally formed, the axial direction of the axle 137 faces each other so that it is easy to ensure the connection holes 1 8 7 provided in the two flanges 1 8 3 b and 1 8 3 b. . . . . . . . . Position accuracy. The front wheel WF is also configured similarly to the rear wheel WR. The front part of the power component P is swingably supported by the vehicle body stand 15 through a vibration-proof link 1 8 8. The anti-vibration link 188 is provided with a pair of left and right engine-side brackets 189, which are located on the left and right side of the housing main body 1 39 of the power composition P from the centerline BC of the vehicle body and lean to the left. , 189, and a pair of rack-side brackets 171 and 171 fixed to the left and right pairs of the main frame 17 of the vehicle body rack 15 and a cylindrical swinging cylinder arranged between the two engine-side brackets 189 and 189 190, and oscillatingly supports the oscillating cylinder 190, a connecting shaft 191 provided between the two engine side brackets 189, 189, and formed into a cylindrical shape with a rectangular cross section and one end fixed to the oscillating The link member 192 of the cylinder 190 and the cylindrical outer cylinder 193 fixed at the other end of the link member 192 at the other end are arranged coaxially between the two frame-side brackets 171 and 171. The cylindrical inner cylinder 194 in the outer cylinder 193 and the cylinders -22- (19 ) (19) 200403385-like shell 195, respectively sintered the outer periphery of the rubber bushing 196 ,. . . . . . . . . . And swing. The swing support shaft 197 provided between the two frame-side brackets 171 and 171 and the arm 198 fixed to the middle portion in the axial direction of the outer tube 193 may be supported by the inner tube 194, And a stopper rubber 199 to be mounted on the front end of the arm 198. The above-mentioned stopper rubber 199 is such that the upper and lower inner surfaces of the abutted body 200 can contact the upper and lower sides of the stopper rubber 199 and are inserted into a support tube fixed between two rack-side brackets 171 and 171 Inside the cylindrical abutment body 200 of 172. In addition, the abutted body 200 and the stopper rubber 199 are disposed on the center line BC of the own vehicle body, and are more biased toward the left side of the engine-side brackets 189 and 189 and the link member 192. In this structure of the anti-vibration link 188 is, the engine E composed of power P and the load acting on the swing support 197 is a rubber bush 196 ,. . . . . . . . . It is absorbed by the elastic deformation of the stopper rubber 1 99, and at the same time is absorbed by the elastic deformation caused by the stopper rubber 1 99 being pressed against the upper and lower inner surfaces of the abutment body 200. The power is limited above and below the body 200. Composition P also has a range of up and down swings. As shown in FIG. 12, the upper part of the power component P and the vehicle body frame 15 are connected so that the power component P can swing up and down, and is connected by a non-stretchable support member 201. In the first embodiment, a bracket 202 is provided on the front upper portion of the housing main body 139 of the power component P from the center line B C of the vehicle body, which is biased to the left side. A bracket 203 is provided between the support post 28 of the vehicle body platform 15 and the reinforcement member 29 of the left side (-23) (20) (20) 200403385 from the center line BC of the vehicle body. Formed on the upper end of the solid cylindrical support member 201, it is freely connected to the vehicle via a rubber bushing 204 and a connecting shaft 205 parallel to the swing support shaft 197 of the anti-vibration link 188 The bracket 203 on the side of the body table 15 and the lower end of the supporting member 201 are interposed with a rubber bush 206 and a connecting shaft 207 parallel to the above-mentioned connecting shaft 205 and swingably connected to the bracket 202 on the power component P side. . The two brackets 202 and 203 are arranged in front of the rear wheel WR, and the two brackets 202 and 203 are connected to the power component P and the vehicle body frame 15 via a support member 201, respectively. Next, the effect of this embodiment will be described. Lies on the engine E 'camshaft 68 is arranged in the linkage of the intake side and exhaust side rocker arms 70, 71 than the intake valve 58 and exhaust valve 59. The connection point is close to the combustion chamber, and the intake valve 58 and the exhaust valve 59 are arranged on the cylinder head 41 in parallel with their opening and closing operation directions. Therefore, the opening and closing operation directions are parallel to each other. The air valve 59 and the linkage and connection points of the intake-side and exhaust-side rocker arms 70 and 71 are arranged near each other, so that the width of the cylinder head 41 can be reduced. In addition, one of the air inlet 56 and the air outlet 57 is located on a projection plane perpendicular to the plane of the axis of the cam shaft 68, and at least a part of the cam shaft 68 is superimposed. And is provided on the cylinder head 41 at a position separated from one end in the axial direction of the cam shaft 68. Therefore, the camshaft 68 can be arranged closer to the combustion chamber 55 side, so that the cylinder head 41 can be miniaturized in the direction along the cylinder axis. -24- (21) (21) 200403385 It is located on a straight line parallel to the axis of the camshaft 68, and the open ends of the suction port 56 and the exhaust port 57 to the combustion chamber 55 are arranged, so it is obtained in the combustion chamber A vortex occurs within 5 to improve combustion efficiency. Furthermore, the ignition plug 76 having an axis having a significant acute angle α with respect to the plane P1 which includes the axes of the intake valve 58 and the exhaust valve 59 in common is mounted on the cylinder head 41. Therefore, it is possible to avoid arranging the related parts of the intake valve 58 and the exhaust valve 59 around the ignition plug 76, so that a sufficient blank space can be ensured, and the ignition plug 76 is vulnerable to cooling air. Effective cooling of the ignition plug 76 can be achieved. In addition, the first group of matching openings 87 corresponding to the camshaft 68 and the second group of matching openings 98 corresponding to the rocker shaft 69 are independently provided on one side wall of the cylinder head 41 to close the second group The second cover member 9 9 with the opening portion 98 is fitted into the second group of opening portions 98 while being prevented from moving in the axial direction, and the first cover member 88 is engaged with the second cover member 99. The outer surface is fixed to the cylinder head 41 by, for example, screwing. Therefore, the second cover member 99 does not need to secure the space for mounting the cylinder head 41 around the second pair of openings 98, so the shaft between the cam shaft 68 and the rocker shaft 69 is set smaller. The distance thus contributes to the miniaturization of the cylinder head 41. In addition, one side of the cylinder head 41 can be implemented in the same direction: in order to assemble the second support recess 95 and the second support hole 96 for the camshaft 68, no complicated work is required, and processing can be improved sufficiently. Precision, reducing the number of processing workers. -25- (22) (22) 200403385 Furthermore, the primary air supply unit 107 for supplying the secondary air to the exhaust port 5 7 is connected to the reed valve 105 ′ provided on the head cover 42 of the engine body 38 and the secondary A part of the air supply pipe 107 is formed by a secondary air supply pipe 1 17 whose outside is exposed to the outside air and whose both ends are connected to the engine body 38. Therefore, the secondary air supply pipe 1 1 7 ′ is cooled by the air, so that the transfer of heat to the reed valve 105 can be suppressed. Therefore, by installing the reed valve 105 on the head cover 42, the length of the secondary air supply pipe 107 between the reed valve 105 and the exhaust port 57 is shortened. Although the engine E type is still air-cooled, It can reduce the adverse effect of heat on the reed valve 105, and the two ends of the secondary air supply pipe 1 1 7 are held between the combined cylinder head 41 and the head cover 42, so there is no need to make the secondary air The supply pipe 117 is connected to a connecting member such as a buckle or a raccoon for the engine main body 38, so as to reduce the number of parts and the number of assembly labor, thereby reducing the cost, and it is not necessary to consider the space for the connection parts. This increases design freedom. In addition, O-rings 1 1 8 and 1 1 9 are interposed between the two ends of the secondary air supply pipe 117 and the head cover 42 and the cylinder head 41 respectively, so it is not necessary to increase the secondary air supply pipe 1 1 The machining accuracy of both ends of 7 can improve the tightness of the ends of the secondary air supply pipe 117 to the connection portions of the head cover 42 and the cylinder head 41 by using the plucking force of the o-rings 118 and 119. The number of processing steps can be reduced and the cost can be reduced, and the assembling work is easier than when a connection member such as a buckle or a tassel is used. The engine body 38 is mounted on the locomotive so that the secondary air supply pipe 1 17 faces the front side in the running direction. Therefore, it is necessary to cool the secondary air supply pipe more effectively by the r r r -26- (23) (23) 200403385 when the locomotive is traveling. In addition, the engine main body 38 faces the reed valve 105 forward in the running direction of the locomotive, and at the same time, connects the reed valve 105 and the secondary air supply pipe 117 to the first passage portion 107a of the head cover 42. It is placed on the locomotive in a square shape in front of the direction of travel of the locomotive, so the cooling effect of the walking wind can further reduce the adverse effect of heat on the reed valve 105. In addition, the front part of the power component P including the engine E and the power transmission device T that transmits the output of the engine E and is transmitted to the rear wheels WR is supported on the vehicle body table via a vibration-proof link 188 and swings up and down.架 15。 Frame 15. The anti-vibration link 1 8 8 is provided with a stopper rubber 199 that is plucked into contact with the abutted body 200 provided on the body frame 15 to limit the power swing range P above and below the power. The upper part of the component P and the body frame 15 are provided with non-stretchable support members 201 that allow the power component P to swing up and down and connect the power component P and the body frame 15. Therefore, instead of the bumper before and after, the power component P is supported on the vehicle body stand 15 with a non-stretchable support member 201, thereby achieving miniaturization, weight reduction, and cost reduction. And the dynamic range of the power composition P is determined by the deflection of the stopper rubber 199 of the abutment body 200 that is in contact with the abutted body 200 on the 15 side of the body frame. Limited to a relatively narrow range to improve space efficiency. Making both the side of the body frame 15 and the side of the power component P facilitate the design of the components for interior and exterior installation, and increase the freedom of each design including the new design. In addition, in front of the rear wheel WR, the supporting member 201 is used to connect the -27- (24) (24) 200403385 force to the upper part P and the rear part of the vehicle body frame 15, so the supporting member 201 can be shortened. The weight and cost reduction of the support member 201 can be achieved, and one end of the support member 201 is connected to the support pillars 28 fixed to the chair post 18 at both ends, and to the left and right sides of the support pillar 28 and the chair post, respectively. 18 Reinforcing members 2 9 extending from the chair post 18 to the rear and upwards. . . . . . . . . Since the bracket 2 03 is located on one side, the power component P can be firmly supported despite the simple structure. Furthermore, as the second embodiment of the present invention, as shown in FIG. 13, the support member 2 0 1 ′ may be formed into a hollow cylindrical shape. In this way, the structure for supporting the power component P on the vehicle body stand 5 can be made more lightweight and cost-effective. Further, as the third embodiment of the present invention, as shown in Fig. 14, the support member 201 or 201 'may be connected to the bracket 203' fixed to the chair post 18. In this way, a simple structure can be used to firmly support the power component P. The embodiments of the present invention have been specifically described above, but the present invention is not limited to the above embodiments, and it is unavoidable that the design of the present invention described in the scope of patent application can still implement various design changes. (Effects of the Invention) According to the invention described in item 1 of the above-mentioned patent application scope, the linkage and connection points of the suction valve and the exhaust valve and the suction side and exhaust side swing arms may be arranged near each other. The width of the cylinder head can be narrowed, and the camshaft can be arranged closer to the combustion chamber side, so that the cylinder head can be made more compact in the direction of the cylinder axis (25) (25) 200403385. According to the invention described in the second item of the above patent application scope, the swirling occurs in the combustion chamber to improve the combustion efficiency. According to the invention poem described in item 3 of the scope of the patent application, the parts of the intake valve and the exhaust valve can be avoided around the ignition plug, and a sufficient blank space is ensured by # 司 * & By contacting point X_, efficient cooling of the ignition plug can be achieved. In addition, according to the invention described in item 4 of the above-mentioned patent application scope, the cylinder head can be made more compact along the axis of the rocker shaft. [Simplified description of the drawing] Figure 1 is the first implementation Example of a side view of a locomotive. Figure 2 is a plan view of the rear section of the locomotive along line 2-2 of Figure 1. Figure 3 is an enlarged side view of the rear portion of the locomotive. Figure 4 is a sectional view taken along line 4-4 of Figure 3. Figure 5 is an enlarged view of the front part of Figure 4. Figure 6 is an enlarged cut-away side view of the front of the engine body. It is a sectional view taken along line 6 · 6 in Fig. 7. Figure 7 is a sectional view taken along line 7-7 in Figure 6. Fig. 8 is a sectional view taken along line 8-8 in Fig. 7. FIG. 9 is an enlarged view of a main part of FIG. 5. Figure 10 is an enlarged view of the rear part of Figure 4. Fig. 11 is an enlarged cross-sectional view taken along line 1 1 · 11 in Fig. 3. ms -29- (26) (26) 200403385 Figure 12 is a sectional view taken along line 1 2-12 in Figure 3. Fig. 13 is a sectional view corresponding to Fig. 12 of the second embodiment. Fig. 14 is a sectional view corresponding to Fig. 12 of the third embodiment. [Symbol description] 15 Car body stand 16 Head tube 17 Main frame 18 Seat post 19 Front fork 2 0 Steering handle 21 Brake lever 22 Balancer 23 Cargo basket support member 24 Cargo basket 25 Headlight '26 Seat 27 Seat Support tube 28 Support pillar 29 Reinforcing member 30 Combustion box 3 1 Electronic control composition 3 2 Rear direction indicator light 3 3 Tail light -30- (27) 200403385 34 Crank type pedal 3 7 Crank shaft 3 8 Engine body 3 9 Casing 4 0 gas red 4 1 cylinder head
4 1 a冷卻散熱片 4 1 b凸出部 42 頭蓋 4 3 氣缸孔 44 活塞 4 5 連桿 46 曲柄梢 47 ^ 48 滾珠軸承 49 包密構件4 1 a Cooling fin 4 1 b Projection 42 Head cover 4 3 Cylinder bore 44 Piston 4 5 Connecting rod 46 Crank tip 47 ^ 48 Ball bearing 49 Enclosing member
50 轉子 5 1 固定子 52 AC發電機 53 引擎蓋 5 5 燃燒室 56 吸氣口 57 排氣口 5 8 吸氣閥 59 排氣閥 -31 - (28)200403385 60、 6 1 導 筒 62、 63 保 持器 64、 65 閥 簧 66 動 閥 室 67 動 閥 裝 置 68 凸 輪 軸 69 搖 桿 軸 70 吸 氣 側 搖臂 70a 凸 輪 滑 塊 71 排 氣 側 搖臂 7 1a 凸 輪 滑 塊 72 吸 氣 側 凸輪 73 排 氣 側 凸輪 74、 75 挺 桿螺栓 76 點 火 塞 77 定 時 傳 動機構 78 驅 動 鏈 輪 79 被 動 鏈 輪 80 凸 輪 鏈 條 8 1 凸 輪 鏈 條室 82 第 1支承凹部 83 第 1支承孔 84 滾 珠 軸 承 87 第 1組配用開口部50 Rotor 5 1 Holder 52 AC generator 53 Hood 5 5 Combustion chamber 56 Intake port 57 Exhaust port 5 8 Intake valve 59 Exhaust valve -31-(28) 200403385 60, 6 1 Guide cylinder 62, 63 Holder 64, 65 Valve spring 66 Actuating valve chamber 67 Acting valve device 68 Camshaft 69 Rocker shaft 70 Suction side rocker arm 70a Cam slider 71 Exhaust side rocker arm 7 1a Cam slider 72 Suction side cam 73 Row Air cam 74, 75 Tappet bolt 76 Ignition plug 77 Timing transmission mechanism 78 Drive sprocket 79 Passive sprocket 80 Cam chain 8 1 Cam chain chamber 82 First support recess 83 First support hole 84 Ball bearing 87 First matching With an opening
-32- (29)200403385 88 第1蓋構件 89 母螺牙 90 封密構件 9 1 卡合溝 92 限制凸部 95 第2支承凹部 9 6 第2支承孔-32- (29) 200403385 88 1st cover member 89 female screw 90 sealing member 9 1 engagement groove 92 restricting protrusion 95 second support recess 9 6 second support hole
97 螺栓 98 第2組配用開口部 99 第2蓋材 99a凸緣部 99b切開部 100封密構件 1 〇 1空氣濾淸器 1 0 2氣化器97 Bolt 98 Opening part for the second group 99 Second cover material 99a Flange part 99b Cut-out part 100 Sealing member 1 〇 1 Air filter 1 0 2 Vaporizer
1 0 3排氣管 104排氣消音器 105簧片閥 107二次空氣供給路 l〇7a 第1通路部 l〇7b 第2通路部 108閥殼體 109殼體主部 1 10蓋 -33· (30) (30)200403385 1 l〇a連接管部 1 1 1上游室 1 1 2下游室 1 1 3閥座板 1 1 4閥座孔 1 1 5擋止器板 1 16簧片 1 1 7二次空氣供給管 1 1 7 a、b擴徑部 1 1 7、1 1 8 〇 形環 123油泵 124油泵外殼 125輸入軸 1 2 6被動齒輪 1 2 7驅動齒輪 1 2 8吐出口（油泵） 129 (機）油通路 130 > 131 通路 132 (機）油噴出孔 1 3 3溫度感測器 1 3 4給油蓋 135 V形皮帶型自動變速機 1 3 6減速齒輪系 137車軸 -34- (31) (31)200403385 138動力傳達裝置T之殼體 139外殼主體 140左側殻體 1 4 1右側殼體 1 4 2第1傳動室 1 4 3第2傳動室 1 4 4軸承箱 1 4 5驅動帶輪 146、147 被動帶輪 148 V形皮帶 149固定帶輪半體 1 5 0可動帶輪半體 1 5 1離心機構 1 5 2、1 5 3滾珠軸承 154固定帶輪半體 155可動帶輪半體 1 5 6離心離合器 1 5 9中間軸 160第1齒輪 161第2 齒輪 162第3 齒輪 163第4 齒輪 164第一單向離合器 1 65車軸支承得件 -35- (32) (32)200403385 1 66支承筒部 167、168 滾珠軸承 169第2單向離合器 1 7 0被動鏈輪 1 7 1機架側托架 1 72支承筒 173腳踏板軸 1 7 4滾珠軸承 1 7 5驅動鏈輪 176支承臂 1 77 > 178 鏈輪 1 7 9鏈條 1 8 0鏈條蓋 1 8 2煞車鼓輪 1 8 3轂 18 3a 圓筒部 183b 凸緣 1 8 4輪緣 1 8 5輪胎 1 8 6鋼絲輪輻 1 8 7連結孔 1 8 8防振連桿 189引擎側托架 1 9 0擺動筒 -36- (33) (33)200403385 1 9 1連結軸 192連桿構件 1 9 3外筒 1 94內筒 1 9 5外殼 196橡膠襯套 1 97擺動支軸 198臂 199擋止器橡膠 2 0 0被抵接體 201支承構件 202 、 203 托架 204橡膠襯套 2 0 5連結軸 206橡膠襯套 20 7連結軸 C 氣缸軸線 BC 車體中心線 E 引擎 P1 平面 P2 平面1 0 3 exhaust pipe 104 exhaust muffler 105 reed valve 107 secondary air supply path 107a first passage portion 107b second passage portion 108 valve housing 109 housing main portion 1 10 cover -33 · (30) (30) 200 403 385 1 l〇a connecting pipe 1 1 1 upstream chamber 1 1 2 downstream chamber 1 1 3 valve seat plate 1 1 4 valve seat hole 1 1 5 stopper plate 1 16 reed 1 1 7 Secondary air supply pipe 1 1 7 a, b Expansion part 1 1 7, 1 1 8 O-ring 123 oil pump 124 oil pump housing 125 input shaft 1 2 6 driven gear 1 2 7 drive gear 1 2 8 discharge port (oil pump) 129 (machine) oil passage 130 > 131 passage 132 (machine) oil ejection hole 1 3 3 temperature sensor 1 3 4 oil supply cap 135 V-belt type automatic transmission 1 3 6 reduction gear train 137 axle -34- ( 31) (31) 200 403 385 138 Housing of the power transmission device T 139 Housing main body 140 Left housing 1 4 1 Right housing 1 4 2 1st transmission room 1 4 3 2nd transmission room 1 4 4 Bearing box 1 4 5 Drive Pulleys 146, 147 Passive pulleys 148 V-belt 149 Fixed pulley half 1 5 0 Movable pulley half 1 5 1 Centrifugal mechanism 1 5 2, 1 5 3 Ball bearings 154 Fixed pulley half 155 Movable pulley Half body 1 5 6 Centrifugal clutch 1 5 9 Intermediate shaft 160 1st gear 161 2nd gear 162 3rd gear 163 4th gear 164 1st one-way clutch 1 65 axle support parts -35- (32) (32) 200403385 1 66 support tube 167, 168 ball bearing 169 2nd one-way clutch 1 7 0 passive sprocket 1 7 1 frame side bracket 1 72 support tube 173 foot pedal shaft 1 7 4 ball bearing 1 7 5 drive sprocket 176 support arm 1 77 > 178 sprocket 1 7 9 chain 1 8 0 chain cover 1 8 2 brake drum wheel 1 8 3 hub 18 3a cylindrical portion 183b flange 1 8 4 rim 1 8 5 tire 1 8 6 wire spoke 1 8 7 connection hole 1 8 8 Vibration link 189 Engine side bracket 1 9 0 Swing tube -36- (33) (33) 200 403 385 1 9 1 Connecting shaft 192 link member 1 9 3 Outer tube 1 94 Inner tube 1 9 5 Outer casing 196 Rubber bushing 1 97 swing support shaft 198 arm 199 stopper rubber 2 0 0 abutted body 201 support member 202, 203 bracket 204 rubber bushing 2 0 5 coupling shaft 206 rubber bushing 20 7 coupling shaft C cylinder axis BC body center Line E engine P1 plane P2 plane