A7 305012 _ B7 五、發明説明（1 ) [發明所屬之技術領域] 本發明係關於一種内燃機之起動系構造，更詳细地說， 係關於一種規定將起動馬達安裝於曲柄箱内的位置關係及 介於起動馬達和曲柄軸之間的減速齒輪安裝位置關係之起 動系。 [習知技術] 圖1 2及圖1 3顯示習知内燃機之起動系構造的一例（特公 平5 - 6 8 3 9 8號公報）。 此為具備單體擺動內燃機的二輪機車例，圖12為內燃機 的概略側截面圖，圖13為顯示起動糸要部的構造，為沿著 圖12之X m-x m線切斷的截面圖。 曲柄軸0 2左右水平配設於曲柄箱也兼作一部分的單體擺 動箱01前部中央，使汽缸04延出上方而設置内燃機03。 雖然圖未示，但後輪軸支於單體擺動箱01後部，曲柄軸 的驅動透過皮帶傳動機構傳到後輪。 從單體擺動箱01前壁起*懸掛支架05突設於前方，其前 端為樞軸06所支承於車體骨架上，Μ同樞軸06為中心，單 體擺動箱01可和後輪共同上下搖動，媛衝機構介裝於單體 擺動箱01後端和其上方的車體骨架間。 起動馬達07在單體擺動箱01前部，在和曲柄袖02之曲柄 銷02a相同左右方向位置（曲柄中心C)，在曲柄銷02a前方 ，在汽缸04和支持支架05之間，使驅動軸07a和曲柄軸02 成為平行，安裝於單體擺動箱01。 起動馬達07從曲柄中心C側（右側）安裝於單體擺動箱01 前部，形成於起動馬達07之驅動袖〇7a的驅動齒輪010嚙合 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -4 ---------^ -裝------訂-----4線 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 經濟部中央標準局員工消費合作杜印製 305012 A7 B7 五、發明説明（2 ) 於與架設於單體搌動箱01和左側箱蓋08之間的減速齒輪軸 09轉動自如地嵌合的減速齒輪011之大徑齒輪〇lla，減速 齒輪011之小徑齒輪011b嚙合於曲柄軸02側的起動系齒輪 0 12° 馬達支架015嵌入起動馬達07之驅動袖07a側，同馬達支 架015形成K驅動轴073為中心的圓筒狀嵌合部015a，在他 方單體搌動箱01前部形成與圓筒狀嵌合部〇15a對應的圓開 口 Ola，將圓筒狀嵌合部015a嵌入同圓開口 Ola内而將起動 馬達07定位固定於單體搌動箱01上。 袖支和同起動馬達07的驅動軸07a之驅動齒輪010_合的 減速齒輪011之減速齒輪軸09，一端支持於單體搌動箱01 側的軸承孔01b，他端支持於左側箱蓋08側的袖承孔08a， 中途貫通袖環016而將減速齒輪011定位。 [發明欲解決之課題] 上述公報所載之例形成如上的起動糸構造，對於單體攞 動箱01，起動馬達07係透過馬達支架015使画苘嵌合部015a 與圓開口 Ola嵌合而定位固定。減速齒輪蚰09架設於單體 振動箱01和左側蓋08之軸承孔01b、08a之間。該结果，不 能期待減速齒輪袖09之袖承對準高的組裝精度，並且減速 齒輪011的組裝精度也不佳。 此外，在單體搌動箱01方面，嵌合支持起動馬達07的圓 開口 Ola和支持減速齒輪軸09的袖承孔01b個別加工，所Μ 加工工數多，同時提高加工對準精度困難。 特別是減速齒輪軸09，由於一端支持於左側蓋08之軸承 本紙張尺度適用中國國家標準（CNS ) Α4規格（210 X 297公釐） -5 _ ---------Λ_ 裝------訂-----(線 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（3 ) 孔08a，所Μ若在單體搌動箱01和左側蓋08之間產生偏移 ，減速齒鞴軸09的軸線就傾斜了。 此外*當然不能將左側箱蓋08形成浮動支持構造，振動 減低效果不能期待。 於是，提出Μ另外準備減速齒輪軸一端的專用托架支持 之例（實公平2-12306號），但零件件數變多，同時起動馬 達的支持和減速齒輪的支持個別形成，未解除前述課題。 再者，如Μ上，起動馬達07配設於曲柄中心C，所Μ和 汽缸04或曲柄箱片閥式時的吸氣糸機構及其他排氣糸機構 左右方向的位置相同。因此，關於這種内燃機基本功能的 機構在起動馬達的配置受到限制而限定配置的自由度。 此外，起動馬達07安裝於單體摒動箱01外側，所Μ對於 行駛時的泥水，需要充分的保護構造，0形環或襯墊、馬 達內油紂等零件件數變多。 本例之起動糸構造，由於係減速齒輪軸09架設於單體播 動箱01和左側箱蓋08之間的構造，所Μ不能將左側箱蓋08 形成浮動構造。 如將起動馬達07 S3置於單體搌動箱01下側，則必須更嚴 密地形成防水構造，同時也會影響二輪機車的傾斜角。 雖然也提出將起動馬達配置於單體振動箱内之例（特公 平1-31036號公報），但同例傳動系為鏈條方式，在曲柄軸 和後方減速機構之間有充裕空間，配設於此空間，和皮帶 傳動方式不同。 而且，同例使起動馬達之驅動軸大致指向前後方向，因 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -6 - ------；---ΛI ------訂-----( 線--^ (請先閱讀背面之注意事項再填寫本頁) 五、發明説明（4 ) 此為變 此外 不能將 課題。 本發 在内燃 而可使 部的加 裝構造 換動力 ，減速 左側箱 明係鑑 機之起 減速齒 工容易 本發明之第 供一種翮於内 A7 B7 經濟部中央標準局員工消費合作社印製 外形成特別的防水構 護，零件件數少的單 [解決課題之手段] 為了達成上述第一 ，係利用一體緊固於 定支持於曲柄箱，將 動系齒輪連接内燃機 機之起動系構造 方 持減速齒輪軸一端的 嵌合部形成於前述支 持前述減速齒輪袖他 支架側嵌合部，一方 承周圍者。 方向而零件件數變多。 齒輪袖架設於單髖攞動箱和左側箱蓋之間， 蓋形成浮動檇造等具有和前述習知例相同的 於這種點所完成的，本發明之第一目的*係 動系構造方面，提供一種特別不要專用托架 輪的組裝精度及組裝作業提高，軸承及嵌合 且可提高加工精度的起動馬達之減速齒輪安 二目的，係在内燃機之起動系構造方面，提 燃機基本性能之機構配置自由度大*不必另 造，對於行駛時的泥水可做充分的保 體播動内燃機之起動馬t令裝構造。 目的，本發 起動馬達的 起動馬達之 之曲柄軸的 面，其特徵 支架側袖承 架側軸承周 端的箱側袖 嵌入他3的箱 明之内燃機之起 馬達支架將該起 驅動軸透過減速 構造。本發明係 在於：在馬達支 ，在該馬達支架 圍，在前述曲柄 承，€较曲柄箱將 側嵌合部形公前 動系構造 動馬達固 齒輪及起 在此内燃 絮設f支 將支架側 箱設置支 對於前述 述箱側軸 ------r--A —裝------訂-----(線 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） 7 - 7 305012 A7 B7五、發明説明（5 ) 經濟部中央標準局員工消費合作社印製 及圍，合組 周加 支 狀曲徑形架合 機輪曲裝。輪 架周上嵌 Μ 承求 動 筒述外由支嵌 燃動和安者動 支承箱的所 軸謀 浮 圓前部藉達工 内主袖置造主 達軸 柄部， 之可 的 或將合，馬加 述之動位構之 馬同曲合輪 袖， 蓋 狀，嵌承及時 上構驅圔的構 的於於嵌齒 輪部 成 柱承側軸箱同 在機其周内機 體成定兩速 齒合 形 圓軸架側柄地 係動使外箱動 一形固因減 速嵌 可 成側支箱曲易 明傳係輪柄傳 達部位準裝 減工 ， 形架述述，容 發帶達動曲帶 馬合定對組 在加 架 部支前前造可 本皮馬主於皮 動嵌達承時 都時。托 合述於置構時。，：動之設的 起的馬袖同 方同高用。嵌前等設裝工高的於起構配心 和方動的且 雙可提專果側置略心安加提目在述機而中 於他起軸並。架時的要效架設有中輪承加二徵前動蓋柄 設入將輪，高支工度需低支心具孔齒袖更第特，傳覆曲 承嵌合齒度提達加精不減的中成画速之度述其上帶所開 軸方嵌速精業馬承工承動側部形同減軸精上，軸皮蓋離 之一的減裝作及袖加軸振架合部在之輪 Η 成面 f 在箱於 _ 將部之組裝箱，和之待支嵌合 * 達齒加達方之，為設 輪，合裝的組柄部減軸期達側嵌孔馬速使了 造機行，配 齒方嵌組高，曲合削輪可馬架^ 圓動減可為構燃平内達 速雙兩時待少，嵌的齒，述支的的起於時，糸内為箱馬 減箱用同期數外成數速造前同側徑述都同者動於成柄動 將柄利 Μ 可工此形工減構將在箱內上方，再起定軸曲起 曲，所而裝 圍工 持 ，柄之 成雙部 之 固柄於 ----------{—裝------訂-----(線 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） 8 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（6 ) 外周圍位置，所Μ不會干擾内燃機之汽缸或吸氣糸機構， 闞於這種内燃機基本性能之機構配置自由度大。 此外，起動馬達安裝於曲柄箱内，為箱蓋所覆蓋而配設 於曲柄箱内，所Μ即使不另外構成特別的防水構造，也可 以充分保護免行駛時的泥水，同時不要使起動馬達防水的 特別零件，可減少零件件數。 起動馬達使其驅動軸和曲柄軸成為平行，所以無需改變 動力方向，可減少傳動的零件件數。 即使驅動軸和曲柄袖平行，起動馬達為箱蓋所覆蓋，也 不會使左右寬度增加，收容於曲柄箱内，不會給與當作二 輪車的傾斜角影響。 前述起動馬達一面將減速齒輪袖支於和曲柄箱之間，一 面從開方側安裝於曲柄箱上，前述起動馬達之驅動軸透過 前述減速齒輪而齒輪連接從前述主動輪起在内側有的起動 系齒輪，藉由形成上述内燃機之起動馬達安裝配置構造， 不必使減速齒輪袖支持於左側箱蓋，因此可將箱蓋形成浮 動吏_構造，同時起動系構造的組裝作業容易。 [發明之實腌形態] Μ下，就圖1至圖10圖示的本發明實施一形態加Μ說明。 圖1為具備闞於本發明之單體搌動内燃機的速克達型二 輪機車1側面圖。 透過低的地板部4連接車體前部2和車體後部3，形成車 體骨骼的車體骨架5在車體前部下降後分支成兩支，在地 板部4下方向後方延伸，接著在車體後部3向上方旦後方延 本紙張尺度適用中國國家標準（CNS〉八4規格（2丨0Χ297公釐） -q - --I-------^ 丨 ------訂-----( 線-J__ (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（7 ) 長0 座椅6設於車髅後部3上部，具備手柄7的轉向節叉8設於 該前方車體前部2上部。 透過前叉9，前輪10懸掛於車體前部2，為手柄7所轉向。 而且，支架11左右都立設於向車體骨架5後部斜上方起 立的傾斜部上方位置，在兩支架11、11間架設樞軸12，將 一端支承於同樞軸12的連桿13他端透過樞袖18連接突設於 搌動單體15之單體攞動箱16前部上方的左右一對懸掛支架 17，擺動單體15將前部支持於連桿13，上下搖動自如，同 時從連桿13起在後方，後減振器19介裝於和車體骨架5之 間。 在搌動單體15前部一體設置内燃機20，在後部軸支後輪 21，内燃機20的動力為附有自動變速功能的皮帶傳動機構 2 2所傳到後輪2 1。 燃料箱23在地板部4下部固定裝載於車體骨架5上。 内燃機20為二行程内燃機，汽缸25從單體搌動箱16前部 若干向上突出前方，同汽缸25從前述連稈13在下方貫通左 右車體骨架5間。 此外，該內燃機20採用片閥26設於曲柄箱部的曲柄箱片 閥方式，吸氣管27從單體搌動箱16之曲柄箱部的上部延出 ，連接汽化器28，從裝載於單體搌動箱16後部的空氣濾清 器29將空氣導入汽化器28。 從内燃機20之汽缸25下部延出下方的排氣管30在曲柄箱 部下方句後方且向右側迂迺，連接配設於車體右側的消音器 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ ι〇 _ --------{—裝------訂-----(線 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（8 ) 31 〇 又，在車體骨架5之地板部4的後部，支架32突設於後方 ，站立脚架33支承於位於搌動單體15前部下方的支架32前 端。 圖2為將攞動單體15沿著圖1之大概E - I線切斷展開的 截面圖。 曲柄箱也兼作一部分的單體搌動箱16在前側曲柄箱部16a 分割成左側單體箱16L和右側單體箱16R，Μ螺栓35緊固兩 箱 16L ' 16R ° 這種單體攞動箱16前部相當於曲柄箱部16a，汽缸25突 設於其前部。 在曲柄箱部16a内，曲柄軸36旋轉&如地支持於裝在右 箱16R上的主軸承37R和裝在左側單體箱16L上的主袖承37L ，向左右方向延伸，其兩端從曲柄箱部16a突出外方。 連桿3 4連結使汽缸25之汽缸孔25a注復運動的活塞24和 曲柄軸36之曲柄銷36a。 參照圖3，為活塞24所開閉的排氣口 25b及掃氣口 25c設 於汽缸孔25a，利用因活塞24上升行程而在曲柄箱部16a內 產生的負壓，前述片閥26打開，混合氣從前述汽化器28被 吸入曲柄箱部16a内，為活塞24下降行程所壓縮，通過掃 氣通路25d *從掃氣口 25c供給汽缸孔25a。 片閥2b略配設於曲柄銷36a位置之左右方向的曲柄中心C ，因此連接同片閥26的吸氣管27如圖4圖示，從略曲柄中 心C延出上方斜左側而連接汽化器28。 本紙張尺度適用中國國家標準（CNS ) A4規格（2丨Ο X 297公釐） _ j j _ -------,γ I裝------訂-----線 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 S05012 Μ Β7 五、發明説明（9 ) 另一方面，發電機38及冷却扇39安装於曲柄軸36右端部 ，皮帶傳動機構22之主動輪40安裝於左端，同時起動單向 離合器41設於主動輪40右側。 起動單向離合器4瑞滾子式單向離合器，起動從動齒輪42 一體形成內輪42a，在一方和内輪42a透過軸承43相對地旋 轉，和曲柄軸36—體的外輪44在内II]面形成凸輪面，使滾子 45介於和内輪42a之間。 左側單體箱16L從曲柄箱部16a向後方*傳動箱壁16b延 伸，左側開放面透過襯塾46為傳動箱蓋47所覆蓋，皮帶傳 動機構22收容於其内部，曲柄軸36的旋轉經過主動輪40、 V皮帶48、從動皮帶輪49、離合器50傳到從動軸51*從動 袖51的旋轉再透過減速齒輪裝置52傳到後端的後車軸53。 如前述，在從曲柄箱部16a向後方，傳動箱壁16b延伸的 前後，長單體擺動箱16之左側單體箱16L如圖5及圖6 ®斤、； 外周壁16c包圍左側開口周圍，外周壁16c端面成為接合面 16d，在外周壁16c各處突出外方，形成螺栓突出部16e。 參照圖6，左側單體箱16L之曲柄箱部16a在以嵌合支持 曲柄軸36之主軸承37L的圓孔為中心而圓形展開的側壁60 和其圓周壁形成收容前达处動單向離合器41的圓形空間61， 在其t /3外周壁16c膨出成三角形狀，和三角形狀側壁62 失同形成收容後述起動馬達80的三角空間63。 又，前述左側懸掛支架17從形成三角空間63的外周壁 16c突出前方。 形成圓形空間61的側壁60從形成三角空間63的側壁62在 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） _ 1 9 _ --------(—裝------訂-----_ 線 11 (請先閲讀背面之注意事項再填寫本頁) A7 B7 經濟部中央標準局員工消費合作社印製 五、 發明説明 1〇) 1 1 内 側 (右側） 有 台 階 高差 9 沿 著此台階 高差 部 而 形 成 三 角空 « 1 1/ I 間 63的 側 壁 62上 形 成中 間 台 階高差的 大致 半 圓 形 側 壁 64， 1 1 將 其 周 圍 形 成 圓 筒 壁65 9 將 其内部形 成圓 孔 66 〇 /-—S 請 先 1 1 圖 孔 66 及 圓 筒 壁 65因 圓 形 空間6 1而 缺少 略 下 半 部 同時 閱 ik 1 背 1 形 成 將 上 方 一 部 分 缺成 半 圓 形的小圓 形部 67 〇 面 之 1 在 形 成 圓 孔 6 6的 側壁 64中 心形成軸 承孔 68 〇 意 事 1 項 此 外 三 角 空 間 63之 側 壁 62在圓孔 66的 前 方 斜 上 和 後方 再 填 1 裝 突 設 指 向 左 右 方 向 形成 螺 栓 孔 69a> 70a的 螺 栓 突 出 部 69、 馬 頁 1 70 〇 —^ 1 覆 蓋 一 方 左 側 單 體箱 1 6 L左側開口的傳動箱蓋4 7如圖2、 1 ! 圖 7及圖1 0 圖 7K， 具有與左側單體箱1 6L左 側 開 □ 對 應 的右 1 | 側 開 口 在 前 後 長 的側 壁 47 a周圍與左側單體箱1 6L 之 外周 訂 I 壁 16 c對應形成外周壁47c 與接合面 16d對向形成接合面 1 1 47d 與螺栓突出部1 6 e 對 向 形成螺栓 突出 部 47 e , 1 1 外 周 壁 47 c前部也膨出上方形成三角空間73， 該三角形 狀 的 前 後 兩 邊 之 中 ，在 後 邊 上部形成 切口 75 〇 k 1 形 成 三 角 空 間 73 的側 壁 中 央部圓形 地若 干 膨 出 外 方 ，形 1 成 圓 形 空 間 74 〇 1 1 而 且 傳 動 箱 蓋 47在 其 外 周壁47c前壁部Μ貫通的形式 1 I — 體 形 成 指 向 前 後 方向 的 圓 茼76，圓 筒76在 前 方 開 □ ，作 1 1 為 外 氣 導. 入 P 77 將傳 動 箱 蓋4 7前方 的空 氣 導 入 傳 動 箱内 1 1 部 0 1 I 此 外 從 側 壁 47 a中央若干靠後方 ，四角筒體7 8在内側 1 I 中 央 高 度 位 置 有 開 P ， 指 向 後方斜向 下， 貫 通 外 周 壁 47c 1 1 下 壁 部 t 形 成 向 下 的排 氣 P 7 9 - 1 1 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -13 - A7 B7 經濟部中央標準局員工消費合作社印製 五、 發明説明 ；11) 1 1 從 則 方 外 氣導 入 □ 77所導入的 空 氣 成 為 下 構 造：冷 却 ♦ r r 1 1/ I 傳 動 箱 内 的 V皮帶4 8傳動機構後從排氣口 7 9被排出。 1 1 配 設 於 左 側單 體 箱 1 6 L的曲柄箱部1 6 a 之 二 角 空 間63和 對 請 先 1 1 應 的 傳 動 箱 蓋47 之 -二 角 空間73的 起 動 馬 達 80如 圖 8至圖1 0 閲 讀 背 1 圖 示 係 内 轉子 82M 驅 動軸83為 中 心 > 旋 轉 白 如 地支持 於 面 之 注 1 圓 筒 狀 外 殼 8 1内 部 在 驅動軸83 突 出 的 外 部 開 □ 側馬達 支 意 % 1 項 架 85為 螺 钉 8 4所 一 體 緊 固於外凸 緣 部 8 1 a上l ) 再 填 1 裝 傳 動 齒 早冊 8 3 a形成於從驅動軸8 3之馬達支架8 5突出外方 寫 本 頁 1 的 部 分 〇 '—✓ 1 1 在 馬 達 支 架85之 驅 fCI, 動 軸83突出 的 側 面 85 a如圖9所示， 外 1 1 周 緣 落 在 驅 動軸 83上 般 地突出形 成 圓 柱 狀 嵌 合 部 8 6 1 I 嵌 合 部 86 係外 徑 大 致 等於設於 前 逑 左 側 單 體 箱 1 6L之三 訂 I 角 空 間 63的 圓孔 66 內 徑 ，與中心 的 軸 承 孔 68對 向 同樣在 中 1 1 心 形 成 軸 承 孔87 9 並 和 圓孔66同 樣 缺 少 下 方 的 一 部分， 同 1 1 時 與 小 圓 形 部6 7對 應 缺成半圓 形 形 成 作 為 驅 動軸83 通 路 的 小 圓 形 部88 〇 線 I 又 在 馬 達支 架 85 之 側面85a Μ驅動軸83為中心，在 1 大 致 對 稱 位 置穿 設 螺 栓 貫通孔89 90 同 螺 栓 貫 通孔89 > 1 I 90與 左 側 單 體箱 1 6 L的螺栓突出部6 9、 70之螺栓孔69a、 70a 1 I 對 應 〇 1 1 蓋 板 91 堵 塞形 成 於 馬 達支架85 周 面 一 部 分 的 開 口，同 時 1 1 從 起 動 馬 達 85延 出 的 電 線連接部 92 設 於 蓋 板 9 1 上 ，電線 93 1 1 從 連 接 部 92 向外 方 延 伸 〇 1 I 減 速 齒 輪 τηο 軸95 兩 端 分 別嵌入左 側 單 體 箱 16L之軸承孔68 1 1 和 對 向 的 馬 達支 架 85之 軸承孔87 内 » 減 速 齒 wnr TfrU 96 透過軸 承 1 1 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -14 經濟部中央標準局員工消費合作社印製 A7 ___B7 五、發明説明（12 ) 襯套97旋轉自如地支持於兩嵌入部間（參照圖10)。 減速齒輪96係大徑齒輪96a和小徑齒輪96b構成同輸一體。 因此，將一體緊固馬達支架85的起動馬達80安裝於左側單 體箱16L時，先透過袖承襯套97將嵌合減速 齒輪96的減速齒輪軸95右端嵌人左側單體箱16L之軸承孔 68，同時使小徑齒輪9 6 b嚙兮於嵌合於曲柄軸36的起動單向 離合器41之起動/從幼齒輪42。 然後，用以馬達支架85為右側，使驅動軸83指向左右水 平方向的姿勢*將起動馬達80從左側安裝於左側單體箱 16L之三角空間63內。 當時，使令一端嵌入袖承孔68內的減速齒輪軸95他端嵌 入馬達支架85之袖承孔87内，並將起動馬達80突出的驅動 軸83接合小圓形部67，將馬達支架85之圓柱狀嵌合部86嵌 入圓孔66內定位觸接，驅動軸83前端部之傳動齒輪83a就 與減4岛輪96之大徑齒輪96a嚙合。 Μ減速齒輪軸95為中心，將馬達支架85 —面若干轉動一 面調整，使螺栓貫通孔89、90與前後的螺栓孔69a、7〇3 — 致，分別貫通旋合螵栓98、99而將起動馬達80安裝於左側單 體箱16L上。 由於如此所安裝的起動馬達80的驅動軸83之傳動齒輪83a 與減速齒輪96之大徑齒輪96a哨合，和大徑齒輪96a—體的小 徑齒輪96b與起動單向離合器41之起動從動齒輪42嚙合（參 照圖10)，所Μ起動馬達80的驅動會透過減速齒輪96、起 動單向離合器41傳到曲柄軸36，供作内燃機20的起動。 本紙張尺度適用中國國家標準（CMS ) Α4規格（210X297公釐） _ 15 - ----------^ I 裝------訂-----^ I.線--- (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（13 ) 安裝於左側單體箱16L上的起動馬達80如圖10所示，接 近位於皮帶傳動機構22之主動輪40上方，左一半從左側單 體箱16L突出左側。 其次，在左側單體箱16L左側，在接合面16d、47d間夾 住襯墊46蓋上傳動箱蓋47。 襯螫46係截面呈3字狀，先嵌合於傳動箱蓋47之接合面 47d，再觴接左側單體箱16L之接合面16d。 使傳動箱蓋47側之螺栓突出部47e與多數設於左側單體 箱16L之外周壁16c周圍的螺栓突出部16e—致後>乂螺栓100 貫通旋合，對於左側單體箱16L，透過襯錾46將傳動箱蓋 47形成浮動支持構造而安裝。 又，襯墊46前部上方的一部分形成金羼孔眼46a，同金 雇孔眼46a嵌合於設於傳動箱蓋4 7乏外周壁47c的切口 75(參 照圖4)，連接起動馬達80的電線93從同金靥孔眼46a延出 外面。 由於在左側單體箱16及和起動馬達80 —體的馬達支架85 雙方具有支持減速齒輪袖95端部的軸承孔68、87，Μ同軸 承孔68、87為中心，在周圍使圓孔66和圓柱狀嵌合部86分 別互相對應而設置，随著減速齒輪96，使減速齒輪軸95支 持於軸承孔68、87，使圓柱狀嵌合部86嵌入圓孔66内而將 起動馬達80定位固定於左側單體箱16上，所以減速齒輪軸 95的組裝精度極高，並且組裝工數少，組裝作業佳。 再者，在左側單體箱16方面，由於圓孔66中心有軸承孔 68，所Μ軸承孔68加工時可同時加工圓孔66及圇筒壁65, 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） _ 16 _ .^—批衣 訂 ( 線 (請先聞讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 305012 A7 B7 五、發明説明（14 ) 可削減加工工數，同時可使加工對準精度提高。 同樣對於馬達支架85*也可同時進行其_承孔87和圓柱 狀嵌合部86的加工，可謀求加工工數削減和加工對準精度 提高。 由於將一端支持於左側單體箱16之軸承孔68的減速齒輪 軸95他端支持於和起動馬達80 —體的馬達支架85之軸承孔 87，不要專闲托架，並不使其支持於傳動箱蓋47，所以没 有因彳$馱箱蓋47偏移而使減速齒輪輸95軸線產生傾斜的情形 ，可用高精度固定減速齒輪軸95的位置。 再者*如本實施形態，可將傳動箱蓋47形成浮動支持構 造，可期待振動減低效果。 Μ上的實施形態是將起動馬達80配設於單體搌動箱16内 之例，其次將如圖11所示，說明將起動馬達外裝於一般曲 柄箱時之例。 圖11為起動馬達120安裝於曲柄箱110上的要部截面圖， 在和起動馬達120—體安裝的馬達支架125上形成和起動馬 達120之驅動軸121中心偏移的扁平圓柱狀嵌合部126，同 圓柱狀嵌合部126之中心部若干膨出，在這種圓柱狀嵌合 部126中心形成軸承孔127。 一方曲柄箱110之前壁，係左側®壁ll〇a膨出前方，將右 側開口，同開口的内緣一部分形成画孔嵌合部111，將起 動馬達120安裝成馬達支架125堵塞同開口，當ef偉馬達支架 1 2 5之圓枝狀嵌合部126嵌入曲柄箱110側的圓孔嵌合部111内 而定位。 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） _ ι 7 - —----«.--^ I 裝-- (請先聞讀背面之注意事項再填寫本頁)A7 305012 _ B7 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a structure of a starting system of an internal combustion engine, and more specifically, relates to a positional relationship which specifies that a starter motor is installed in a crank case And the starting system of the installation position relationship of the reduction gear between the starting motor and the crankshaft. [Conventional Technology] FIG. 12 and FIG. 13 show an example of the starting system structure of a conventional internal combustion engine (Japanese Patent Publication No. 5-6 8 3 9 8). This is an example of a two-wheeled locomotive equipped with a single swing internal combustion engine. FIG. 12 is a schematic side cross-sectional view of the internal combustion engine. FIG. 13 is a cross-sectional view taken along the line X m-x m in FIG. The crank shaft 02 is horizontally arranged at the center of the front part of the single swing box 01, which also serves as a part of the crank case, and the cylinder 04 is extended above to provide the internal combustion engine 03. Although not shown in the figure, the rear wheel shaft is supported at the rear of the single swing box 01, and the drive of the crank shaft is transmitted to the rear wheels through a belt transmission mechanism. From the front wall of the single swing box 01 * The suspension bracket 05 is protrudingly arranged in the front, the front end of which is supported by the pivot 06 on the frame of the car body, M is the same as the pivot 06, and the single swing box 01 can be shared with the rear wheel Shaking up and down, the Yuanchong mechanism is installed between the rear end of the single swing box 01 and the car body frame above it. The starter motor 07 is located at the front of the single swing box 01, in the same left-right position as the crank pin 02a of the crank sleeve 02 (crank center C), in front of the crank pin 02a, between the cylinder 04 and the support bracket 05, and drives the drive shaft 07a and the crank shaft 02 become parallel, and are mounted on the single swing box 01. The starter motor 07 is mounted on the front of the single swing box 01 from the crank center C side (right side), and the drive gear 010 formed on the drive sleeve 〇7a of the starter motor 07 meshes with this paper standard. It is applicable to the Chinese National Standard (CNS) A4 specification (210X297 Mm) -4 --------- ^ -installed ------ ordered ----- 4 line (please read the notes on the back before filling this page) Staff of Central Bureau of Standards, Ministry of Economic Affairs Printed by the consumer cooperative in the Ministry of Economic Affairs, Central Standards Bureau, Employee Consumption Cooperation, 305012 A7 B7 V. Description of the invention (2) The reduction gear shaft 09 is rotatably connected to the reduction gear shaft 09 installed between the single-acting box 01 and the left box cover 08 The large-diameter gear 〇lla of the reduction gear 011 fitted, and the small-diameter gear 011b of the reduction gear 011 mesh with the starter gear 0 on the crankshaft 02 side. The motor bracket 015 is embedded in the drive sleeve 07a side of the starter motor 07, same as the motor bracket 015 Form a cylindrical fitting portion 015a centered on the K drive shaft 073, and form a circular opening Ola corresponding to the cylindrical fitting portion 015a at the front of the other single-pulse box 01, and insert the cylindrical fitting portion 015a is embedded in the opening Ola of the same circle to position and fix the starter motor 07 to the single box 0 1 on. The sleeve shaft and the reduction gear shaft 09 of the reduction gear 011 of the drive gear 010_coupling of the drive shaft 07a of the starter motor 07, one end is supported on the bearing hole 01b on the side of the single-actuation box 01, and the other end is supported on the left side cover 08 The side sleeve bearing hole 08a penetrates the sleeve ring 016 midway to position the reduction gear 011. [Problem to be Solved by the Invention] The example contained in the above-mentioned publication forms the above-mentioned starting shovel structure. For the single pumping box 01, the starting motor 07 is fitted by the motor holder 015 by fitting the painting accommodating portion 015a with the round opening Ola. Fixed positioning. The reduction gear No.09 is installed between the single vibration box 01 and the bearing holes 01b and 08a of the left side cover 08. As a result, the sleeve bearing of the reduction gear sleeve 09 cannot be expected to have high assembly accuracy, and the assembly accuracy of the reduction gear 011 is also poor. In addition, with respect to the single-acting box 01, the circular opening Ola supporting the starter motor 07 and the sleeve bearing hole 01b supporting the reduction gear shaft 09 are individually processed, which requires a large number of processing steps, and it is difficult to improve the processing alignment accuracy. Especially for the reduction gear shaft 09, because one end supports the bearing on the left side cover 08, the paper size is applicable to China National Standard (CNS) Α4 specification (210 X 297 mm) -5 _ --------- Λ_ ----- Subscribe ----- (Line (please read the notes on the back before filling in this page) A7 B7 printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs V. Invention Instructions (3) Hole 08a, So If there is an offset between the single shock box 01 and the left side cover 08, the axis of the reduction gear shaft 09 is inclined. In addition, of course, the left side cover 08 cannot be formed into a floating support structure, and the vibration reduction effect cannot be expected. In this paper, we proposed an example in which a special bracket support for one end of the reduction gear shaft was prepared (No. 2-12306), but the number of parts increased, and the support for the starter motor and the support for the reduction gear were formed separately. Furthermore, as in M, the starter motor 07 is arranged at the center C of the crank, so that the intake and exhaust air mechanisms and other exhaust air mechanisms in the cylinder 04 or crank case valve type are the same in the left and right directions. Therefore, regarding this Mechanism for basic function of internal combustion engine in starting motor The configuration is limited and the degree of freedom of the configuration is limited. In addition, the starter motor 07 is installed outside the single swing box 01, so the mud water during driving needs a sufficient protection structure, O-ring or liner, oil in the motor The number of parts increases. The starter structure in this example has a structure in which the reduction gear shaft 09 is erected between the unit broadcast box 01 and the left side cover 08, so the left side cover 08 cannot be formed into a floating structure. If the starter motor 07 S3 is placed on the lower side of the single drive box 01, the waterproof structure must be formed more strictly, and it will also affect the tilt angle of the two-wheeled locomotive. Although it is also proposed to arrange the starter motor in the single vibration box Example (Japanese Patent Publication No. 1-31036), but the transmission system of the same example is a chain method, and there is ample space between the crankshaft and the rear deceleration mechanism, and it is arranged in this space, which is different from the belt transmission method. The drive shaft of the starter motor roughly points in the front-back direction, as this paper scale is applicable to the Chinese National Standard (CNS) Α4 specification (210X297mm) -6-------; --- ΛI ------ SET- ---- (line-^ (please read the back first (Notes to fill out this page) V. Description of the invention (4) This is a change and the subject cannot be changed. The internal combustion of this engine can make the installation structure of the department change the power, reduce the speed of the left side box. The first of the invention is easy to be printed on the inside of A7 B7. The Ministry of Economic Affairs, Central Standards Bureau, Employee Consumer Cooperative printed outside to form a special waterproof structure, and the number of parts is small [means to solve the problem] Integrally fastened to the fixed support on the crankcase, connecting the power train gear to the starter structure of the internal combustion engine. The fitting portion holding one end of the reduction gear shaft is formed on the fitting portion on the bracket side supporting the reduction gear sleeve. . Direction and the number of parts increases. The gear sleeve is erected between the single hip pumping box and the left side cover, and the cover is formed as a floating tarp, etc. The same as the above-mentioned conventional example is accomplished at this point, the first object of the present invention , To provide a special purpose without special bracket wheels, assembly accuracy and assembly work are improved, the bearing and the fitting of the starter motor and the reduction of the machining accuracy can be improved. The purpose is to improve the basic performance of the combustion engine in the structure of the starting system of the internal combustion engine The mechanism has a large degree of freedom in configuration * No need to create another. The mud water during driving can be fully protected and the internal combustion engine can be started. For the purpose, the crankshaft surface of the starter motor of the starter motor of the present invention is characterized by the bracket side sleeves and the box side sleeves at the bearing end of the bracket side. It is embedded in the engine box of his 3 boxes. The motor bracket will drive the drive shaft through the deceleration structure. The present invention lies in: the motor support, the motor bracket surrounding, the crank bearing, the side of the crank box will be fitted with a male front dynamic system structure, the fixed gear of the motor, and the internal combustion engine is provided with f support The side box is set to support the side axis of the box described above ------ r--A --installed ------ order ----- (line (please read the precautions on the back before filling this page) The paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) 7-7 305012 A7 B7 5. Invention description (5) Printed and enclosed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy The radial frame is combined with the wheel wheel. The wheel frame is embedded with M. The shaft is designed to support the combustion cylinder and the mover. The front part of the support box is floated by the main sleeve. Shaft shank part, may or may be combined, the horse with the dynamic configuration of the horse with the curved joint wheel sleeve, cover-shaped, embedded bearing and the upper structure drive the stubborn structure in the cogwheel part to form the column bearing side axle box In the same machine, the body is fixed to the two-speed tooth-shaped round shaft frame side shank. The outer box moves and the shape is fixed. The transmission part of the wheel handle of the Ming dynasty is ready for installation and reduction of work, and the description of the shape frame. The Rongfa with the moving curve belt and the horse fixed pair can be made before the rack support is added. .Tuohe is described in the configuration.,: The raised horse sleeve is the same height as the side. The front is built with a high working height and the double side can be lifted. Xin An Jia Ti Mu is in the machine and he starts the shaft and merges. The main effect when setting is to set up the middle wheel bearing plus the second move front cover handle is set into the general wheel, high support requires low support heart with hole tooth sleeve The second feature is to pass the curved bearing to fit the teeth, Tida adds precision, and does not reduce the speed of the Zhongcheng painting. The reduction of one of the cover parts and the wheel of the sleeve and shaft vibration frame are at the wheel Η. The surface f is in the box at the _ part of the assembly box, and it is to be fitted with the support *. , The shaft speed of the combined group shank reaches the side inlay hole during the shaft reduction period, which makes the machine run. The toothed square inlay group is high. The curved cutting wheel can be used. ^ The circular motion can reduce the speed of the internal combustion. Less, embedded teeth , Shito is used for box horse to reduce the box, the same number of the same number of times before the speed is built, the same side diameter is described, the same is moved into the handle, the handle is used, and the shape is reduced above the box, and then the fixed shaft is bent. The song is installed by the surrounding work, the handle becomes a double fixed handle at ---------- {— 装 ------ 訂 ----- (線 (please read the back first Please pay attention to this page and then fill out this page) This paper scale is applicable to the Chinese National Standard (CNS) Α4 specification (210X297 mm) 8 A7 B7 printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of invention (6) Outside location, so Μ will not interfere with the cylinders or suction mechanism of the internal combustion engine. Kan has a large degree of freedom in the configuration of the mechanism of the basic performance of this internal combustion engine. In addition, the starter motor is installed in the crankcase and is arranged in the crankcase to cover the lid. Therefore, even without a special waterproof structure, it can fully protect against muddy water during driving, and at the same time do not make the starter motor waterproof Special parts can reduce the number of parts. The starter motor makes its drive shaft and crank shaft parallel, so there is no need to change the power direction, and the number of transmission parts can be reduced. Even if the drive shaft is parallel to the crank sleeve and the starter motor is covered by the box cover, it will not increase the left and right widths. It is housed in the crank box and does not affect the tilt angle of the motorcycle. The starter motor sleeves the reduction gear between the crankcase and the crankcase, and the crankcase is mounted on the crankcase from the open side. The drive shaft of the starter motor passes through the reduction gear and is geared to start from the driving wheel. By forming the starter motor mounting and disposing structure of the internal combustion engine described above, it is not necessary to support the reduction gear sleeve on the left side cover, so the cover can be formed into a floating structure, and the assembly work of the starter structure is easy. [Physical Pickling Form of the Invention] Under M, a description will be given of an embodiment of the present invention illustrated in FIGS. 1 to 10 with M added. Fig. 1 is a side view of a scooter-type two-wheeled locomotive 1 equipped with a single-propelled internal combustion engine of the present invention. The car body frame 5 which forms the car body skeleton is branched into two branches after the car body skeleton is lowered through the low floor part 4 and the car body rear part 3 is formed, and extends under the floor part 4 to the rear, and then The rear part of the car body 3 extends upwards and extends backwards. The paper size is applicable to the Chinese national standard (CNS> 84 specifications (2 丨 0Χ297mm) -q---I ------- ^ 丨 ------ Order ----- (line-J__ (please read the precautions on the back before filling in this page) A7 B7 printed by Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of invention (7) Length 0 Seat 6 is set in the car At the upper part of the rear part 3 of the skull, a steering fork 8 with a handle 7 is provided at the upper part of the front part 2 of the front body. Through the front fork 9, the front wheel 10 is suspended from the front part 2 of the body and turned by the handle 7. Moreover, the bracket 11 is left and right Both are erected at a position above the inclined portion that rises obliquely upward toward the rear of the car body frame 5, and a pivot shaft 12 is erected between the two brackets 11, 11, and a link 13 supporting one end on the same pivot shaft 12 is connected to the other end through a pivot sleeve 18 A pair of left and right suspension brackets 17 above the front portion of the single-body moving box 16 provided with the moving unit 15, the swinging unit 15 supports the front on the connecting rod 13, It swings freely and at the same time from the link 13 to the rear, and the rear shock absorber 19 is interposed between the body frame 5. The internal combustion engine 20 is integrally provided at the front of the shaking unit 15, and the rear wheel 21 is supported at the rear. The power of the internal combustion engine 20 is transmitted to the rear wheels 21 by a belt transmission mechanism 2 2 with an automatic transmission function. The fuel tank 23 is fixedly mounted on the body frame 5 under the floor portion 4. The internal combustion engine 20 is a two-stroke internal combustion engine and a cylinder 25 Some of the front part of the single shaker box 16 protrudes upward, and the same cylinder 25 penetrates between the left and right vehicle body frames 5 from the aforementioned connecting rod 13 below. In addition, the internal combustion engine 20 uses a slice valve 26 provided in the crank case of the crank case In the valve mode, the suction pipe 27 extends from the upper part of the crank case portion of the cell agitator box 16, is connected to a carburetor 28, and introduces air into the vaporizer 28 from an air cleaner 29 mounted on the rear of the cell agitator box 16. The exhaust pipe 30 extending downward from the lower part of the cylinder 25 of the internal combustion engine 20 is detoured to the right behind the bottom of the crankcase, and connected to the muffler arranged on the right side of the car body. This paper standard applies to the Chinese National Standard (CNS) A4 specification ( 210X297mm) _ ι〇_ -------- {— 装 ------ 定 ----- (线 (Please read the precautions on the back and then fill out this page) A7 B7 printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs V. Description of the invention (8) 31 〇 In addition, at the rear of the floor portion 4 of the car body frame 5, the bracket 32 protrudes rearward, and the standing tripod 33 is supported at the front end of the bracket 32 located below the front of the movable unit 15. Fig. 2 shows the moving unit 15 is a cross-sectional view taken along line E-I of Fig. 1. The crank case also serves as a part of the single-pulse box 16 is divided into a left-side single-case 16L and a right-side single-case 16R at the front crank case 16a, Μ bolt 35 fastens two boxes of 16L '16R °. The front part of this single-swing box 16 corresponds to the crank box part 16a, and the cylinder 25 protrudes from its front part. In the crankcase portion 16a, the crankshaft 36 rotates & is supported by the main bearing 37R mounted on the right case 16R and the main sleeve bearing 37L mounted on the left single case 16L, extending in the left-right direction, both ends It protrudes outward from the crankcase portion 16a. The connecting rod 34 connects the piston 24 for reciprocating the cylinder hole 25a of the cylinder 25 and the crank pin 36a of the crank shaft 36. Referring to FIG. 3, the exhaust port 25b and the scavenging port 25c that are opened and closed by the piston 24 are provided in the cylinder hole 25a, and the negative pressure generated in the crankcase portion 16a due to the ascending stroke of the piston 24 causes the flap valve 26 to open to mix the air. The carburetor 28 is sucked into the crankcase portion 16a, compressed by the descending stroke of the piston 24, and supplied to the cylinder hole 25a from the scavenging port 25c through the scavenging passage 25d *. The leaf valve 2b is slightly arranged at the crank center C in the left-right direction of the position of the crank pin 36a. Therefore, as shown in FIG. 4, the suction pipe 27 connected to the same leaf valve 26 extends from the slightly crank center C to the upper oblique left side to connect the carburetor 28 . This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (2 丨 Ο X 297mm) _ jj _ -------, γ I installed ------ order ----- line (please Read the precautions on the back first and then fill out this page) S05012 Μ Β7 printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of the invention (9) On the other hand, the generator 38 and cooling fan 39 are installed on the right end of the crankshaft 36, The driving wheel 40 of the belt transmission mechanism 22 is installed at the left end, while the starting one-way clutch 41 is provided at the right side of the driving wheel 40. The starting one-way clutch 4 is a roller-type one-way clutch. The starting driven gear 42 integrally forms the inner wheel 42a. On one side, the inner wheel 42a relatively rotates through the bearing 43, and the outer wheel 44 of the crankshaft 36 is in the inner II] plane. The cam surface is formed so that the roller 45 is interposed between the inner wheel 42a. The left unit case 16L extends from the crank case portion 16a to the rear * the transmission case wall 16b, the left side open surface is covered by the transmission case cover 47 through the lining base 46, the belt transmission mechanism 22 is accommodated inside, and the rotation of the crank shaft 36 is actively driven The wheel 40, the V belt 48, the driven pulley 49, and the clutch 50 are transmitted to the driven shaft 51 * the rotation of the driven sleeve 51 and then transmitted to the rear axle 53 at the rear end through the reduction gear device 52. As mentioned above, before and after extending from the crank case portion 16a to the rear, the transmission case wall 16b, the left single case 16L of the long single swing box 16 is as shown in FIGS. 5 and 6; the outer peripheral wall 16c surrounds the left opening, The end surface of the outer peripheral wall 16c becomes a joint surface 16d, and protrudes outward at all places of the outer peripheral wall 16c to form a bolt protruding portion 16e. Referring to FIG. 6, the crank case portion 16a of the left single case 16L is circularly developed around the circular hole of the main bearing 37L of the crank shaft 36 to support the crank shaft 36, and the circumferential wall of the side wall 60 and the circumferential wall form a unidirectional movement before storage. The circular space 61 of the clutch 41 bulges into a triangular shape at the outer wall 16c of t / 3, and differs from the triangular side wall 62 to form a triangular space 63 for accommodating a starter motor 80 described later. The left-side suspension bracket 17 projects forward from the outer peripheral wall 16c forming the triangular space 63. The side wall 60 forming the circular space 61 and the side wall 62 forming the triangular space 63 are in accordance with the Chinese National Standard (CNS) A4 specifications (210 X 297 mm) at this paper scale _ 1 9 _ -------- (— Install ------ order -----_ line 11 (please read the precautions on the back before filling in this page) A7 B7 Printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy V. Description of Invention 1) 1 1 There is a step height difference 9 on the inner side (right side). A triangular space is formed along this step height difference part «1 1 / I. The side wall 62 of the middle 63 is formed with a semi-circular side wall 64 with a middle step height difference, 1 1 is formed around The cylindrical wall 65 9 forms a circular hole 66 in the inside. ○ / -— S Please first 1 1 The hole 66 and the cylindrical wall 65 are missing due to the circular space 6 1 and the lower half is read at the same time. The back 1 is formed above A part of the small round part 67 which is missing into a semicircle 67. One of the faces. A bearing hole 68 is formed in the center of the side wall 64 where the round hole 6 is formed. The side wall 62 of the space 63 is filled obliquely above and behind the round hole 66. A bolt protrusion 69 is formed to project the bolt hole 69a > 70a in the left-right direction. 1 6 L left side transmission box cover 4 7 as shown in Figure 2, 1! Figure 7 and Figure 1 0 Figure 7K, with the right 1 | side opening corresponding to the left side single box 16L left side opening a The periphery corresponds to the left side single box 16L and the outer peripheral wall 16c. The outer peripheral wall 47c is formed to face the joint surface 16d to form the joint surface 1 1 47d to the bolt protrusion 16 e to form the bolt protrusion 47 e, 1 1 The outer peripheral wall 47 c is also bulged at the front to form a triangular space 73 above, and the front and back sides of the triangular shape are formed with cutouts 75 ok at the upper part of the rear side 1 The central portion of the side wall forming the triangular space 73 is slightly bulged outward, Form 1 into a circular space 74 〇1 1 and drive The box cover 47 is formed in the front wall portion M of the outer peripheral wall 47c. The form 1 I — the body forms a circular rim 76 pointing in the front-rear direction, and the cylinder 76 is opened in the front □ for 1 1 as an external air guide. The air in front of the cover 4 7 is introduced into the transmission case 1 1 part 0 1 I. In addition, it is slightly behind from the center of the side wall 47 a. The square cylinder 7 8 has an opening P at the center height of the inside 1 I, pointing backward diagonally downward and penetrating the outer periphery Wall 47c 1 1 The lower wall part t forms downward exhaust P 7 9-1 1 This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) -13-A7 B7 Employee consumption of the Central Standards Bureau of the Ministry of Economic Affairs Printed by the cooperative. 5. Description of the invention; 11) 1 1 Introduce air from the outside of the square □ 77 The introduced air becomes the following structure: cooling rr 1 1 / I V belt in the transmission box 4 8 After the transmission mechanism, from the exhaust port 7 9 was discharged. 1 1 Two corner spaces 63 of the crankcase portion 16 a and the 6 a of the crankcase portion 16 a arranged on the left side single box and the corresponding first 1 1 transmission box cover 47-the starting motor 80 of the two corner space 73 are shown in FIGS. 8 to Figure 1 0 Reading back 1 The illustration shows the inner rotor 82M with the drive shaft 83 as the center> Rotation is supported on the surface as a note 1 Cylindrical housing 8 1 The inside of the drive shaft 83 protrudes outside the open side motor support% 1 Item holder 85 is screwed 8 4 and integrally fastened to the outer flange portion 8 1 a 1) Refill 1 Install the transmission tooth book 8 3 a is formed from the drive shaft 8 3 of the motor bracket 8 5 protruding outward Part 1 of this page 〇'—✓ 1 1 On the drive fCI of the motor bracket 85, the side surface 85 a of the moving shaft 83 protrudes as shown in FIG. 9, the outer edge 1 falls on the drive shaft 83 and protrudes to form a cylindrical shape. Joint part 8 6 1 I Fitting part 86 The outer diameter is approximately equal to the single unit on the left side of the front 1 6L third set I The inner diameter of the round hole 66 of the angular space 63 is opposite to the center bearing hole 68. The bearing hole 87 9 is formed in the center of the center 1 1 and the round hole 66 is also missing the lower part, the same as 1 1 Corresponding to the small circular portion 67, a small circular portion 88 formed as a passage for the drive shaft 83 is formed in a semicircle. The line I is formed on the side surface 85a of the motor holder 85. The drive shaft 83 is centered at a substantially symmetrical position. Bolt penetrating hole 89 90 Same as bolt penetrating hole 89 > 1 I 90 corresponds to the left side single box 1 6 L bolt protruding portion 6 9 and 70 bolt holes 69a, 70a 1 I correspondence 〇1 1 Cover plate 91 is clogged and formed in the motor An opening in a part of the peripheral surface of the bracket 85, and at the same time 1 1 a wire connecting portion 92 extending from the starter motor 85 is provided on the cover plate 9 1, and a wire 93 1 1 extends outward from the connecting portion 92. 1 Reduction gear τηο Shaft 95 Both ends are inserted into the bearing hole 68 1 1 of the left single box 16L and the opposite In the bearing hole 87 of the motor bracket 85 »Speed reducer wnn TfrU 96 through the bearing 1 1 The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -14 Printed by the Ministry of Economic Affairs Central Standards Bureau Employee Consumer Cooperative A7 ___B7 5 Description of the invention (12) The bush 97 is rotatably supported between the two insertion parts (refer to FIG. 10). The reduction gear 96 is composed of a large-diameter gear 96a and a small-diameter gear 96b. Therefore, when the starter motor 80 that integrally fastens the motor bracket 85 is installed in the left cell 16L, the right end of the reduction gear shaft 95 fitted with the reduction gear 96 is fitted into the bearing of the left cell 16L through the sleeve bushing 97 The hole 68 simultaneously engages the small-diameter gear 9 6 b with the starting / slave gear 42 of the starting one-way clutch 41 fitted to the crankshaft 36. Then, with the motor bracket 85 on the right side and the drive shaft 83 directed in the left-right horizontal direction *, the starter motor 80 is installed in the triangular space 63 of the left cell 16L from the left side. At that time, the other end of the reduction gear shaft 95 inserted into the sleeve bearing hole 68 is inserted into the sleeve bearing hole 87 of the motor bracket 85, and the drive shaft 83 protruding from the starter motor 80 is engaged with the small circular portion 67 to connect the motor bracket 85 The cylindrical fitting portion 86 is inserted into the circular hole 66 for positioning and contact, and the transmission gear 83a at the front end of the drive shaft 83 meshes with the large-diameter gear 96a of the island wheel 96. Μ reduction gear shaft 95 as the center, the motor bracket 85 is rotated a few sides to adjust, so that the bolt through holes 89 and 90 are aligned with the front and rear bolt holes 69a and 70. The starter motor 80 is mounted on the left cell 16L. Since the transmission gear 83a of the drive shaft 83 of the starter motor 80 thus mounted is engaged with the large-diameter gear 96a of the reduction gear 96, the small-diameter gear 96b of the large-diameter gear 96a and the starting one-way clutch 41 are driven to start When the gear 42 is meshed (refer to FIG. 10), the driving of the starter motor 80 is transmitted to the crankshaft 36 through the reduction gear 96 and the starting one-way clutch 41 for starting the internal combustion engine 20. The size of this paper is applicable to the Chinese National Standard (CMS) Α4 specification (210X297mm) _ 15----------- ^ I installed ------ ordered ----- ^ I. line- -(Please read the precautions on the back before filling out this page) A7 B7 printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (13) The starter motor 80 installed on the left single box 16L is shown in Figure 10 As shown, approaching is located above the driving wheel 40 of the belt transmission mechanism 22, the left half protrudes from the left cell 16L to the left. Next, on the left side of the left-hand unit case 16L, the transmission case cover 47 is covered with the gasket 46 sandwiched between the joint surfaces 16d and 47d. The liner 46 has a three-shaped cross-section, which is first fitted to the joint surface 47d of the transmission case cover 47, and then connected to the joint surface 16d of the left single case 16L. The bolt protrusion 47e on the side of the transmission case cover 47 and the bolt protrusions 16e provided around the outer peripheral wall 16c of the left cell 16L are aligned to the back > the bolt 100 is screwed through, for the left cell 16L, through The liner 46 forms a floating support structure for the transmission case cover 47 and is attached. In addition, a portion of the upper portion of the front portion of the gasket 46 is formed with a gold eyelet 46a, and the gold eyelet 46a is fitted into a cutout 75 (see FIG. 4) provided on the outer peripheral wall 47c of the transmission case cover 47 to connect the electric wires of the starter motor 80 93 extends from the hole 46a of Tongjin. Since the left side single case 16 and the motor bracket 85 integral with the starter motor 80 have bearing holes 68 and 87 for supporting the end of the reduction gear sleeve 95, and the bearing holes 68 and 87 are centered, round holes 66 are formed around The cylindrical fitting portion 86 is provided corresponding to each other. With the reduction gear 96, the reduction gear shaft 95 is supported by the bearing holes 68 and 87, and the cylindrical fitting portion 86 is fitted into the circular hole 66 to position the starter motor 80. It is fixed to the left side single box 16, so the assembly accuracy of the reduction gear shaft 95 is extremely high, and the number of assembly work is small, and the assembly work is good. In addition, on the left side of the single box 16, because the round hole 66 has a bearing hole 68 in the center, the round hole 66 and the wall 65 can be processed at the same time when the bearing hole 68 is processed. This paper size is applicable to the Chinese National Standard (CNS) Α4 specification (210X297 mm) _ 16 _. ^ — Approved clothing (line (please read the precautions on the back before filling in this page) Printed by the Ministry of Economic Affairs Central Standards Bureau employee consumer cooperatives 305012 A7 B7 V. Description of invention ( 14) Processing man-hours can be reduced, and processing alignment accuracy can be improved. Similarly, the motor holder 85 * can also be processed with its _ bearing hole 87 and cylindrical fitting 86, which can reduce processing man-hours and processing Alignment accuracy is improved. Since the other end of the reduction gear shaft 95 that supports one end in the bearing hole 68 of the left cell 16 is supported in the bearing hole 87 of the motor bracket 85 that is integrated with the starter motor 80, do not use the idle bracket, and It is not supported on the transmission case cover 47, so there is no case where the axis of the reduction gear 95 is tilted due to the offset of the cover case 47, and the position of the reduction gear shaft 95 can be fixed with high accuracy. Again * as in this embodiment The shape of the transmission box 47. The floating support structure is formed, and the vibration reduction effect can be expected. The embodiment on M is an example in which the starter motor 80 is disposed in the single-actuator box 16. Next, as shown in FIG. An example of a general crank case. FIG. 11 is a cross-sectional view of a main part where the starter motor 120 is mounted on the crank case 110, and is formed on a motor bracket 125 integrally mounted with the starter motor 120 and is offset from the center of the drive shaft 121 of the starter motor 120. The flat cylindrical fitting portion 126 is slightly bulged with the central portion of the cylindrical fitting portion 126, and a bearing hole 127 is formed at the center of the cylindrical fitting portion 126. The front wall of one crank case 110 is the left side wall ll 〇a bulging out the front, opening the right side with a part of the inner edge of the opening to form a painted hole fitting 111, installing the starter motor 120 so that the motor bracket 125 blocks the same opening, when the round branches of the efwei motor bracket 1 2 5 are embedded The joint portion 126 is inserted into the circular hole fitting portion 111 on the side of the crank case 110 for positioning. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) _ ι 7-—---- «.- -^ I install-(Please read the notes on the back first Write this page)
、1T J 線—— 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（15 ) 從曲柄稗110膨出的左側周壁110a起，内壁ll〇c延出內 側，在同内壁ll〇c之前述圓孔嵌合部111的中心位置形成袖 承孔112，嵌入支持袖支減速齒輪131的減速齒輪袖130— 端，满速齒輪袖130也端嵌入支持於前述馬達支架125之袖承 孔 127。 因此，使具備減速齒輪131的減速袅輪輪130—端嵌入支持 於曲柄箱110側的袖承孔112，同時使減速齒輪131之小徑 齒輪131b嘈合於起動單向鐮合器之起動從動齒輪135，安 裝起動馬達120時，使減速齒輪輸130他端嵌入馬達支架 125之袖承孔127内，使馬達支架125之圓柱狀嵌合部126嵌 入曲柄箱110側的圓孔嵌合部111內而定位固定。 又，襯墊115介装於曲柄箱110之開口緣和馬達支架125 的觴接面，以形成防水構造。 此外，曲柄箱110左側夾住襯墊117安装左側箱蓋116。 因前述起動馬達120組裝而形成於起動馬達120之驅動輪 121前端部的傳動齒輪121a嚙合於減速齒輪131之大徑齒輪 131a ° 如此一來，起動馬達120的驅動會透過減速齒輪131傳到 起動從動齒輪135及曲柄袖。 如U上，將起動馬達120外裝於曲柄箱110時，由於在曲 柄箱110和馬達支架125雙方形成圓孔嵌合部111和圓柱狀 嵌合部126，在兩嵌合部111、126中心有軸承孔112、127 ，一面袖承支持減速齒輪軸130，一面使圓柱狀與合部126嵌 入圓孔含部111内，將起動馬達120定位固定於曲柄箱110 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） _ i g _ I !--^ —裝------訂-----(-線--1 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（ιβ ) 上，所Μ減速齒輪軸130的組裝精度高，並且組裝工數也 少 〇 曲柄箱110和馬達支架125雙方都可和加工軸承孔112、 127同時加工圓孔嵌合部111、圓柱狀峩宕部126，可謀求加 工工數削減和加工對準精度提高。 支持減速齒輪軸130不要專用托架，可用高精度固定減 速齒輪軸的位置，左側箱蓋116也可Μ形成浮動喪#檐造。 另一方面，在皮帶傳動機構22之主動輪40上方位置，起 動馬達80配設於向左側離開曲柄中心C的主動輪40外周圍 位置，所Μ起動馬達80不會干擾位於曲柄中心C的汽缸25 或片閥26、吸氣管27及排氣管30，因此關於涉及這種内燃 機20基本性能的配置，可消除起動馬達80配置的限釗，使 自由度大幅提高。 由於起動禺達80®設於將傳動箱蓋47透遇襯墊46蓋在左 側單體箱16L上的單體擺動箱16内，所Μ為了安裝起動馬 達80本身，即使不特別構成防水構造，也可Μ充为保護避免 行駛時的泥水。 因此*不要防水的零件*可削減零件件數。 此外，由於使起動馬達80之驅動軸83和曲柄軸36成為平 行，所Μ可簡化使減速齒輪96介在的起動系構造，因此零 件件數也可Μ削減。 雖然起動馬達80使驅動軸83和曲柄袖36成為平行，但在 單體搌動箱16内配設於上方，不會給與當作二輪車的允I 斜角影響。 本紙張尺度適用中國國家標準（CNS ) Α4規格（2丨0X297公釐） _ 1 q _ ---^ —裝------訂-----(線^-- (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（17 ) 由於利用左側單體箱16L和馬達支架85支持減速齒輪軸 95，所以傳動箱蓋47無需支持減速齒輪軸95，如前述，可將 蹲動箱蓋47形成浮動支持構造，使其具有振動減低效果。 由於和傳動箱蓋47個別安裝起動馬達80，所以起動系機 構的組裝作業容易。 [發明之效果] 本發明將減速齒輪軸之軸承設於和起動馬達一體的馬達 支架及曲柄箱雙方，在同軸氺周圍形成一方嵌入他方的嵌合 部，利用兩嵌合部的嵌合將起動馬達定位固定於曲柄箱上 ，所以同時所組裝之減速齒輪袖的軸承對準因兩嵌合部的 嵌合而可期待高的組裝精度，並因同時組裝減速齒輪，所以 組裝工數少，組裝作業提高。 此外，曲柄箱及馬達支架雙方舒在減速齒輪軸之軸承周圃 形成嵌合部，軸承加工時可同時加工嵌合部，可謀求加工 工數削減和加X精度提高。 減速齒輪軸之軸承不要專 用托架，可形成蓋的浮動支 持構造*可期待振動減低效果。 將馬達支架側的支架側嵌合部形成圓柱狀或圓筒狀，在 同支架側嵌合部中心設置支架側軸承，將曲柄箱側的箱側 嵌合部形成具有略等於支架側嵌合部外徑之内徑的圓孔， 在同圓孔中心設置箱側軸承，所以曲柄箱及馬達支架雙方 都於減速齒輪軸之軸承加工時可容易同時加工嵌合部，同 時可減少加工工數，使加工精度更加提高。 由於起動馬達配設於離開曲柄中心的皮帶傳動機構之主 本紙張尺度適用中國國家標隼（CNS ) A4規格（210 X 297公釐） -2 〇 - ------,--VJ-V-裝------訂-----(線 (請先閱讀背面之注意事項再填寫本頁) A7 305012 B7 五、發明説明（is) 動輪外周圍位置，所Μ不會干播内燃櫬之汽缸或吸氣糸機 構，闞於這種内燃機基本性能的機構配置自由度大。 (請先閱讀背面之注意事項再填寫本頁) 此外，起動馬達安裝於左側單體箱内*為左側箱蓋所覆 蓋而配設於單體搌動箱内，所以即使不另外構成特別的防 水m造，也可μ充分保護避免行駛時的泥水，同時不要將 起動馬達防水的特別零件，可減少零件件數。 起動馬達使其驅動軸和曲柄軸成為平行，所κ無需改變 動力方向，可減少傳動的零件件數。 即使驅動袖和曲柄軸平行，起動馬達為左側箱蓋所覆蓋 ，也不會使左右寬度增加，收容於單體擺動箱内，不會給 與當作二輪車的傾斜角影響。 起動馬達一面將減速齒輪軸支於和左側單體箱之間，一 面從左側安装於左側單體箱上，起動馬達之驅動軸透過減 速齒輪而齒輪連接從主動輪起在内側有的起動系齒輪*所 Μ不必使減速齒輪軸支持於左側箱蓋，因此將左側箱蓋形 成浮動支持構造，可期待振動減低效果，同時起動機構的 組裝作業容易。 經濟部中央標準局員工消費合作社印製 [圖式之簡單說明] 圖1為闞於本發明實施一形態之速克達型二輪機車的側 面圖。 圖2為沿著速克達型二輪機車内燃機之圖1的π - Π線切 斷的截面圖。 圖3為在内燃機之曲柄中心切斷的側截面圖。 圖4為内燃機的一部分上面圖。 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） —21- 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（l9 ) 圖5為顯示卸下內燃機之傳動箱蓋的狀態 的側面圖。 圖6為左側單體箱之曲柄箱部的側面圖。 圖7為傳動箱蓋的右側面圖。 圖8為起動馬達的側面圖。 圖9為圖8的IX箭視圖。 圖10為沿著圖5的X-X線切斷的截面圖。 圖11為另外實施形態的要部截面圖。 圖12為顯示習知起動馬達之安裝配置構造的側截面圖。 圖13為沿著圖12的X ® -X H線切斷的截面圖。 1^—辦衣 訂 ( 線 (請先閱讀背面之注意事項再填寫本頁) [元件編號之說明] 1… 速 克 達 型 二輪機車， 2 車 體 前 部 9 3 . 車體後部， 4 … 板 部 1 5 . 車體骨架， 6 . 瞄給， 7 8 . 轉 向 節 叉， 9 ΐ / m 叉 ，10 前 輪 * 11 • * * « * 支 架 9 12 .樞 軸 f 13 連 桿， 15.. 搌 動 單 體 9 16... 單 體 搌 動 箱 ，1 7 . 懸 掛 支 架， 18 . 樞 軸 t 19... 後 減 振 器 9 20 .. 内 燃 機 * 21 後 輪 * 22 .皮 帶 傳 動 構 f 23 .. 燃 料 箱 9 24 活 塞 9 25 .汽 缸 9 26 片 閥， 27 . 吸 氣 管 ，28 . 汽 化 器 > 29 . 空 氣 濾 清 器， 30. 排 氣 管 ，31 ， 消 音 器 • 32. 支 架 9 33 .. 站 立 脚 架 9 34… 連 桿 » 35 螺 栓 » 36 .曲 柄 軸 9 37 …i 軸 承 * 38 .發 電 機 f 39 •冷 却 扇 » 40 …i 動 輪 9 41 .起 動 單 向 離 合 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） A7 B7 經濟部中央標準局員工消費合作社印製 五、發明説明（2〇) 器，42.....起動從動齒輪，43......軸承，44.....外輪 1 45 .. 滾子， 46 .. * * * 襯 墊 > 47 .傳動 箱 蓋 > 48 .V皮帶，49 ... ..從動皮帶輪， 50 . .離合器， 51 動軸， 52 .. 減 速 齒 輪 裝 置 > 53 . 後 車軸 60 .. 側壁， 6 1.. 圓 形 空 間 9 62 側 壁 9 63 — 角空間 ，64 側 壁 9 65 .圓 筒 壁 * 66 .圓 孔，6 7 .小 圓 形 部 9 68 .軸 承 孔 9 6 9 、Ί0 ..螺栓 突出 部、 73 .. 三角空 間， 74. 圓 形 空 間 9 75 . * ♦ ♦ * 切 口， 76 .圓 筒，77 •外 氣 導 入 α * 78 四 角 筒 體， 79 .排 氣口， 80 .. 起動馬 達， 81 . * * • * 外 殼 t 82 内 轉 子 1 83 .驅 動軸， 84.. 螺 釘 J 85 .馬達 支 架 f 86 .嵌 合部， 87 .. 軸 承 孔 t 88 .小 圓 形 部 > 89 '90 ..螺栓 貫通 孔， 91 . 蓋 板 * 92 . 連 接電 線 f 95 .. ... 減速齒 輪軸 > 96. 減 速 齒 輪 -97. 軸承 襯 套， 98 • 99 * 100.. 螺 栓 9 • 110. .曲柄箱，1 11. 圓 孔 嵌 合 部 ，112 .軸承 孔 * 11 5 .. ...襯墊，1 16 . .左側箱蓋， '117. 襯墊 120. .起動馬達， 12 1 . 驅 動 軸 9 125 .馬達支 架 ，126 .. ...圓柱狀嵌合 部 » 127 . Μ TO 承孔， 130. .減速齒輪軸， 13 1. 減 速 齒 輪 ， 135 ..起 -----r--—裝------訂-----(線 (請先閱讀背面之注意事項再填寫本頁) 動從動齒輪。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -23 -, 1T J line-A7 B7 printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of the invention (15) Starting from the left peripheral wall 110a of the crank barnyard 110 bulging, the inner wall ll〇c extends from the inner side, on the same inner wall ll〇 c The sleeve receiving hole 112 is formed at the center of the circular hole fitting portion 111, and is inserted into the reduction gear sleeve 130 end of the sleeve support reduction gear 131, and the full speed gear sleeve 130 is also inserted into the sleeve bearing supported by the motor bracket 125孔 127. Therefore, the one end of the reduction gear wheel 130 with the reduction gear 131 is fitted into the sleeve bearing hole 112 supported on the crankcase 110 side, and the small-diameter gear 131b of the reduction gear 131 is noisy when the one-way sickle is started. When the starter motor 120 is installed, the other end of the reduction gear 130 is fitted into the sleeve bearing hole 127 of the motor bracket 125, and the cylindrical fitting portion 126 of the motor bracket 125 is fitted into the round hole fitting portion on the crankcase 110 side. The position is fixed within 111. In addition, the gasket 115 is interposed between the opening edge of the crank case 110 and the contact surface of the motor bracket 125 to form a waterproof structure. In addition, the left side of the crank case 110 sandwiches the gasket 117 and installs the left side case cover 116. The transmission gear 121a formed at the front end portion of the driving wheel 121 of the starter motor 120 due to the assembly of the starter motor 120 meshes with the large-diameter gear 131a of the reduction gear 131. In this way, the drive of the starter motor 120 is transmitted to the starter through the reduction gear 131 Driven gear 135 and crank sleeve. As described above, when the starter motor 120 is externally mounted on the crank case 110, since the circular hole fitting part 111 and the cylindrical fitting part 126 are formed on both the crank case 110 and the motor bracket 125, the center of the two fitting parts 111, 126 is There are bearing holes 112, 127, on one side, the sleeve supports the reduction gear shaft 130, and on the other side, the cylindrical shape and the engaging part 126 are embedded in the round hole containing part 111, and the starter motor 120 is positioned and fixed to the crank case 110. The paper size is in accordance with Chinese national standards ( CNS) A4 specification (210 X 297 mm) _ ig _ I!-^ —Install ------ order ----- (-line--1 (Please read the notes on the back before filling in this Page) A7 B7 printed by the Employees ’Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5. On the invention description (ιβ), the assembly accuracy of the reduction gear shaft 130 is high, and the number of assembly work is also small. Both the crankcase 110 and the motor bracket 125 It can process the round hole fitting part 111 and the cylindrical bottom part 126 at the same time as the machining of the bearing holes 112 and 127, which can reduce the number of machining operations and improve the machining alignment accuracy. It supports the reduction gear shaft 130 without a special bracket, and can be used with high precision To fix the position of the reduction gear shaft, the left side cover 116 can also be formed Dynamic funeral. On the other hand, at the position above the driving wheel 40 of the belt transmission mechanism 22, the starter motor 80 is disposed at a position around the outside of the driving wheel 40 away from the crank center C to the left, so the starter motor 80 will not interfere Since the cylinder 25 or the flap valve 26, the intake pipe 27, and the exhaust pipe 30 at the center C of the crank, the configuration related to the basic performance of such an internal combustion engine 20 can eliminate the limitation of the configuration of the starter motor 80 and greatly increase the degree of freedom. Since the starter Yuda 80® is installed in the unit swing box 16 which covers the transmission case cover 47 and the gasket 46 on the left unit box 16L, in order to install the starter motor 80 itself, even if it does not specially constitute a waterproof structure, It can also be filled to protect against muddy water during driving. Therefore, * not waterproof parts * can reduce the number of parts. In addition, since the drive shaft 83 and crank shaft 36 of the starter motor 80 are parallel, the reduction gear can be simplified Since the starting system structure is interposed by 96, the number of parts can also be reduced. Although the starter motor 80 makes the drive shaft 83 and the crank sleeve 36 parallel, it is arranged above in the single-pulse box 16, and will not be given the wrong thing. Make two The impact of the car's allowable I bevel angle. This paper scale is applicable to the Chinese National Standard (CNS) Α4 specifications (2 丨 0X297mm) _ 1 q _ --- ^ —installation -------- order ----- ( Line ^-(please read the precautions on the back before filling in this page) A7 B7 printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy V. Description of the invention (17) Due to the use of the left single box 16L and the motor bracket 85 to support the reduction gear Because of the shaft 95, the transmission box cover 47 does not need to support the reduction gear shaft 95. As described above, the squatting box cover 47 can be formed into a floating support structure to have a vibration reduction effect. Since the starter motor 80 is separately installed with the transmission case cover 47, the assembly work of the starter mechanism is easy. [Effects of the invention] In the present invention, the bearing of the reduction gear shaft is provided on both the motor bracket and the crank case integrated with the starter motor, and a fitting part embedded in the other is formed around the coaxial shaft, and the start is started by the fitting of the two fitting parts. The motor is positioned and fixed on the crankcase, so the bearing alignment of the reduction gear sleeves assembled at the same time can be expected to achieve high assembly accuracy due to the fitting of the two fitting parts, and because the reduction gears are assembled at the same time, the number of assembly work is small and the assembly Homework improved. In addition, both the crankcase and the motor bracket form a fitting part on the bearing circumference of the reduction gear shaft. The fitting part can be processed at the same time during bearing processing, which can reduce the number of machining operations and increase X-precision accuracy. The bearing of the reduction gear shaft does not require a special bracket, and a floating support structure for the cover can be formed. * Vibration reduction effect can be expected. The bracket-side fitting portion of the motor bracket side is formed into a cylindrical shape or a cylindrical shape, a bracket-side bearing is provided at the center of the same bracket-side fitting portion, and the box-side fitting portion of the crankcase side is formed to have a shape slightly equal to the bracket-side fitting portion The round hole with the outer diameter and inner diameter is provided with a box-side bearing at the center of the same round hole, so both the crank case and the motor bracket can easily process the fitting part at the same time when the bearing of the reduction gear shaft is processed, and at the same time can reduce the number of processing operations. Make the processing accuracy more improved. Since the starter motor is equipped with the main paper of the belt drive mechanism away from the center of the crank, the standard paper size is applicable to the Chinese National Standard Falcon (CNS) A4 specification (210 X 297 mm) -2 〇- ------, --VJ- V-install ------ order ----- (line (please read the precautions on the back before filling in this page) A7 305012 B7 5. Description of the invention (is) The location around the outside of the moving wheel will not dry The internal combustion engine cylinder or the suction port mechanism has a large degree of freedom in the configuration of the engine's basic performance. (Please read the precautions on the back before filling in this page) In addition, the starter motor is installed in the left side single box * It is covered in the left side box cover and is arranged in the single-push box, so even if it is not separately constructed with special waterproofing, it can fully protect against mud and water during driving, and at the same time, do not waterproof the special parts of the starter motor. Reduce the number of parts. The starter motor makes its drive shaft and crank shaft parallel, so there is no need to change the power direction, which can reduce the number of transmission parts. Even if the drive sleeve is parallel to the crank shaft, the starter motor is covered by the left side cover. Will not increase the left and right width, contain In the unit swing box, it will not be affected by the inclination angle of the two-wheeled vehicle. The starter motor supports the reduction gear shaft between the left unit box and the left side is installed on the left unit box from the left to drive the starter motor. The shaft passes through the reduction gear and the gears are connected to the starting gear from the driving wheel. Therefore, it is not necessary to support the reduction gear shaft on the left side cover. Therefore, the left side cover is formed as a floating support structure, and the vibration reduction effect can be expected while starting. The assembly work of the organization is easy. Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs [Simple description of the drawings] Figure 1 is a side view of a Secco-type two-wheeled locomotive according to an embodiment of the present invention. The cross-sectional view of the Keda type two-wheeled locomotive internal combustion engine cut along the line π-Π in Figure 1. Figure 3 is a side sectional view cut at the center of the crank of the internal combustion engine. Figure 4 is a part of the internal combustion engine. Standard (CNS) A4 specification (210 X 297 mm) — 21- A7 B7 printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Invention description (l9) Figure 5 shows the display Side view of the state of the transmission case cover of the internal combustion engine. Fig. 6 is a side view of the crank case part of the left single case. Fig. 7 is a right side view of the transmission case cover. Fig. 8 is a side view of the starter motor. Fig. 9 is a view IX arrow view of Fig. 8. Fig. 10 is a cross-sectional view taken along line XX of Fig. 5. Fig. 11 is a cross-sectional view of a main part of another embodiment. Fig. 12 is a side cross-sectional view showing the mounting arrangement structure of a conventional starter motor Figure 13 is a cross-sectional view taken along the line X ® -XH in Figure 12. 1 ^ —Clothing (line (please read the precautions on the back before filling in this page) [Description of component number] 1… Speed Keda type two-wheeled locomotive, 2 front part of car body 9 3. rear part of car body, 4… plate part 1 5. car body frame, 6. aiming, 7 8. steering knuckle fork, 9 l / m fork, 10 front wheel * 11 • * * «* Bracket 9 12. Pivot shaft f 13 connecting rod, 15 .. single element 9 16 ... single element box, 1 7. Suspension bracket, 18. Pivot t 19 ... Rear shock absorber 9 20 .. internal combustion engine * 21 rear wheel * 22 .belt transmission Dynamic structure f 23. Fuel tank 9 24 Piston 9 25. Cylinder 9 26 valve, 27. Suction pipe, 28. Vaporizer> 29. Air filter, 30. Exhaust pipe, 31, Silencer • 32 . Bracket 9 33 .. Stand stand 9 34 ... connecting rod »35 bolt» 36. Crank shaft 9 37… i bearing * 38. Generator f 39 • cooling fan »40… i moving wheel 9 41. Starting one-way clutch The paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) A7 B7 Printed by the employee consumer cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Invention description (2〇), 42 ..... Starting driven gear, 43 ... bearing, 44 ..... outer wheel 1 45 .. roller, 46 .. * * * padding > 47. Transmission case cover > 48 .V belt, 49 ... .. Driven pulley, 50... Clutch, 51 moving shaft, 52 .. reduction gear unit > 53. Rear axle 60 .. side wall, 6 1 .. circular space 9 62 side wall 9 63 — angular space, 64 side wall 9 65 .Cylinder Wall * 66 .Round Hole 6 7 .Small circular part 9 68 .Bearing hole 9 6 9, Ί0 .. Bolt protrusion, 73 .. Triangular space, 74. Circular space 9 75. * ♦ ♦ * Notch, 76 .Cylinder, 77 • Outside air introduction α * 78 square cylinder, 79. Exhaust port, 80 .. starter motor, 81. * * • * housing t 82 inner rotor 1 83. Drive shaft, 84 .. screw J 85. Motor bracket f 86 .Fitting part, 87 .. bearing hole t 88 .small round part> 89 '90 .. bolt through hole, 91 .cover * 92 .connecting wire f 95 ..... reduction gear shaft > 96 Reduction gear-97. Bearing bush, 98 • 99 * 100 .. Bolt 9 • 110.. Crank case, 1 11. Round hole fitting, 112. Bearing hole * 11 5 .. ... pad, 1 16. Left side cover, '117. Gasket 120. Starter motor, 12 1. Drive shaft 9 125. Motor bracket, 126... Cylindrical fitting »127. Μ TO socket, 130 .. reduction gear shaft, 13 1. Reduction gear Wheels, from 135 .. ----- r --— installed ------ ordered ----- (line (please read the precautions on the back before filling in this page) driven gear. The paper size is applicable to China National Standard (CNS) A4 specification (210X297mm) -23-