407114 at Β7 五、發明説明（/ ) [發明之詳細說明] [發明所屬之技術範疇] 本發明係有關一種單元擺動式引擎上之V皮帶冷卻構 造之改良。 [習知之技術] 以往，速克達型等之機車上所使用之將引擎、內藏有V 皮帶傳動裝置的傳動箱與安裝於此傳動箱後部之1個或2 個的後輪予以一體化所成之動力單元，其實行有藉由將V皮 帶傳動裝置予以冷卻，以提高動力傳達用之V皮帶之耐久性 之處理。 作爲上述V皮帶傳動裝置之冷卻方法，例如有於傳動 箱內設置冷卻風導入手段與冷卻風排氣手段，其係將外氣導 入傳動箱內，而將傳動箱內之氣氛之溫度予以降低之方法β [發明欲解決之課題] 經濟部中央標準局員工消費合作社印裝 !-'- I I »11— ..... I - - j I - - - I --1 IK m (請先聞讀背面之注意事項再填寫本頁) 如上述，在將外氣導入傳動箱內，而將傳動箱內之氣雰 溫度予以降低時，爲防止粉塵及泥水等隨外氣一同侵入傳動 箱內部，係對冷卻風導入手段例如於其入口設置一元件，並以 蓋體將之蓋蔽等，此爲以往之防塵對策。 惟，前述冷卻風排氣手段上，例如其出口係朝向車輛後 方，故於雨天時騎乘時，自其出口有泥水等會侵入之虞，故防 泥、防水及防塵之對策等尙有改良之餘地。 本發明係有鑑於上述習知之單元擺動式引擎上之V皮 帶冷卻構造之問題點，而以提供一種例如在雨天乘座時亦可 3_____ 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公楚） 經濟部中央標準局舅工消費合作社印製 4 0 7 j. 1 ^ a 7 B7 五、發明说明（-^) 防止泥水等侵入傳動箱內的具備V皮帶冷卻構造的單元擺 動式引擎，爲其目的者。 [解決課題之手段] 爲達成上述目的，本發明有關之具備V皮帶冷卻構造 之單元擺動式引擎，其係於內藏有v皮帶式動力傳達裝置的 傳動箱與引擎之曲柄箱所一體構成之單元擺動式引擎上，於 前述傳勘箱上設置冷卻風導入手段，而於傳動箱之前述冷卻 風導入手段之較後方處設置冷卻風排氣手段，並將前述冷卻 風排氣手段構成爲曲柄狀，使其入口及出口形成錯開之位置 關係者。 [發明之實施之型態] 以下，參照附圖所示之一實施例，說明有關本發明之具 備V皮帶冷卻構造之單元擺動式引擎之實施型態。 (速克達型機車全體之簡單說明） 第1圖爲採用本發明有關之具備V皮帶冷卻構造之單 元擺動式引擎的速克達型機車的槪略側視圖。 圖中，符號1爲速克達型機車，符號2爲車體骨架。此 車體骨架2係包括:頭管2a;自頭管2a朝車輛後方，朝斜下方 延伸後,則彎曲而略水平地延伸於後方的一根下管2b;自下 管2b之後方略水平地朝後方延伸後，則彎折而朝後方朝斜 上方延伸之左右一對的後管2c。 前述頭管2a係支持著可回動之轉向軸3,該轉向軸3 於其上端設有把手4,而下端則固設著支持前輪5之左右一 對之前叉6。 ____4__ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） —r ---1 _-_ - - - m —^- - I I— -- - - - --- ----丁 , , U3 、-11 r - (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 407114 at B7 五、發明説明（j ) 又，前述後管2c上，介以連桿手段9及緩衝單元10以 可上下搖動之方式支持著具備後輪7之動力單元8。此動 力單元8係於引擎之曲柄箱12上，一體設有內藏有將引擎 11之動力傳達至後輪7之V皮帶式動力傳達裝置13的傳 動箱14,亦即爲一單元擺動式引擎。 如上述般構成之車體骨架2其全體爲車體罩蓋15及 座墊17所覆蓋。車體罩蓋15係由前罩蓋15a、前腿擋板 15b、腳踏板15c、下罩蓋15d、座墊下罩蓋15e及左右一 對之側罩蓋15f所構成，以前述前罩蓋15a及前腿擋板15b 之上部，覆蓋頭管2a之周圍，而以前腿擋板15b之下部與腳 踏板15c及下罩蓋15d覆蓋下管2b與後管2c之前部，又，以 座墊下罩蓋15e與左右一對之側罩蓋15f及座墊16覆蓋後 管2c之後部，而以前述腳踏板15c與下罩蓋15d形成把手4 與座墊16之間之低平狀之載腳台17 〇 上述構成之速克達型機車1之前述動力單元8之前端， 以螺栓將空氣淨化器50固定成位於動力單元8之引擎11 之壓缸側方。此空氣淨化器50係自其周圍及後述之載腳台 17之內部所形成之防塵室80吸入外氣，而將吸入之外氣淨 化後，將自其周圍吸入之空氣供給至引擎11,又將自前述防 塵室80吸入之空氣供給至傳動箱。 以下，詳細說明有關空氣淨化器50及與空氣淨化器50 有關之動力單元8及前述防塵室60之構成。又，以下之說 明中，前後、左右及上下方向均是以車體1爲基準。 (有關動力單元之構成） 5 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -J -- -I I- - - I - - - I- ----- - 1 士衣 H— II - -- .....- - I— I, ----- - (請先閲讀背面之注意事項再填寫本頁) 407114 A7 B7 五、發明説明（+ ) 第2圖爲動力單元8之展開斷面圖。 其述引擎11爲於曲柄箱12之前面，朝車體前方連設以 壓缸之2行程之單氣筒之水平引擎。 前述曲柄箱12之左側，一體設有內藏有V皮帶式動力 傳達裝置13之傳動箱14。此傳動箱14係具備一體形成於 前述曲柄箱12之左側之箱本體14b與安裝於該箱本體14b 之外側仿之箱蓋14a，係自曲柄箱12之左方朝後方延伸》 前述引擎11之曲柄軸20,係被配設成軸端爲位於車體 左右方向，其左側部份突出延伸至傳動箱14之內部。曲柄 軸20之突出於傳動箱14之內部之部份上，設有前述v皮帶 式動力傳達裝置13之驅動側皮帶輪21。此驅動皮帶輪21 係由於曲柄軸20上安裝成可沿軸線方向滑動之可動皮帶輪 半體21a與固定於曲柄軸20上之固定皮帶輪半體21b所構 成。固定皮帶輪半體21b於其內面上設有多數個扇葉21c， 介以空氣淨化器50將導入傳動箱14內之冷卻風w送至傳 動箱14全體，而實現作爲離心風扇之功能。此驅動側皮帶 輪21之回轉係介以V皮帶22傳達至從動側皮帶輪23,介 以離心離合器24順序傳達至從動軸25、減速齒輪組26及 後輪驅動軸27,而將後輪7驅動。 又，傳動箱14之箱蓋14a上，軸支有回轉自如之起動用 腳踩軸28及起動用從動軸29。起動用腳踩軸28其兩端分 別突出於箱蓋14a之外側及內側，外側之端部上固定有腳踩 桿3〇,於內側之端部上則固定有扇形之驅動齒輪31。又，起 動用從動軸29係被支持成可自箱蓋Ma至傳動箱14之內 ______6___ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐) --I - -- I 1 - I I -i - - 士良- m - - - - -- I •-''• - ί ， (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局貝工消費合作社印製 A7 B7 407114 五、發明説明（f) (請先閱讀背面之注意事項再填寫本頁) 部，於軸方向可滑動,其中間部上固設有與前述驅動齒輪31 嚙合之從動齒輪32,又，其前端部上，固設著與前述曲柄軸20 之左側端部上所設之對接離合器半體20a嵌合成可拆可裝 之對接離合器半體33。 (有關箱蓋14a之構造） 於上述構成之箱蓋14a上設有自空氣淨化器50將冷 卻風％導入之冷卻風導入管35與將前述冷卻風w排出至 外部之冷卻風排氣手段90。 第3圖(a)爲自車體左側觀看之箱蓋14a之槪略側視圖 ，第3圖(b)爲第3圖(a)中之箱蓋14a之A-A斷面圖，第3圖 (c)爲第3圖(a)中之箱蓋14a之B視圖，第3圖(d)爲第3圖 (a)中之箱蓋14a之C-C斷面圖，又第4圖爲傳動箱之箱蓋 14a之後部圖之2上之D視圖，第5圖爲第4圖中之E-E斷 面圖，第6圖爲第2圖中之F-F斷面圖。 經濟部中央標隼局貝工消費合作社印製 如第3圖所示，於傳動箱14之箱蓋14a之前部一體形 成有冷卻風導入管35。前述空氣導入管35爲以傳動箱14 內部所設之前述離心風扇（固定皮帶輪半體)21b自下方將冷 卻風w吸入傳動箱14之內部,係在離心風扇21b之前下部 之位置處，使其開口端35a爲斜向前下方開口者。 又，如第2圖及第3圖(b)所示，箱蓋14a之側壁之前端 部附近(第3圖(a)上之施以陰影之弦月狀部份)係凹入至前 述離心風扇21b上所設之扇葉21c附近，於其內面形成有沿 順於離心風扇21b之前側之略半周部份之引導面：36。又，前 述起動用腳踩軸28上所固定之扇狀之驅動齒輪31亦鄰接 7 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） A7 407114 五、發明説明（L) 於前述離心風扇21b之扇葉附近，故其內面有作爲離心風扇 21b之後側之略半周部份之引導面之功能。 -Γ - mV - - - I...... I I i^i -I— in In 丁 > - (請先閱讀背面之注意事項再填寫本頁) 如此，藉由以傳動箱14與驅動齒輪31形成離心風扇 21b之引導面36(31)，可將離心風扇21b自空氣淨化器50介 以冷卻風導入管35吸入至傳動箱14內之冷卻風w，以不逃 竄至傳動箱14之箱蓋14a側之方式，有效率地送至傳動箱 14之後方，亦即沿V皮帶22達至從動側皮帶輪21側，而可 將V皮帶22有效地冷卻》 又，如第2圖至第6圖所示，於傳動箱14之箱蓋14a之 後部，設有冷卻風排氣手段90。 此冷卻風排氣手段90特別如第4圖及第5圖所示，係 由一體形成於箱蓋14a上之第1排氣管91與安裝於該第1 排氣管91上之第2排氣管92所構成。 前述第1排氣管91，其入口 91a係開口於傳動箱14之 上下方向略中間部份，又，其出口 91b係開口於傳動箱14之 底面，前述出口 91b係形成爲可連結第2排氣管92之二重 壁構造。 經濟部中央標準局員工消费合作社印製 第2排氣管92其入口 92a與其出口 92b係以錯開形 成之方式，於內部形成彎曲狀之排氣通路,其入口 92a側在插 入形成於傳動箱14之第1排氣管91之出口 91b上之二重 壁間後，在形成於傳動箱14之肋部位置被以螺栓94固定。 藉此，冷卻風排氣手段90其入口（亦即第1排氣管91 之入口 91a)與其出口（亦即第2排氣管92之出口 92b)係形 成爲錯開之位置關係，因於內部形成有全體爲彎曲狀之排氣 8 ^紙乐尺度適用中國國家標準( CNS ) A4規格（210x297公釐) 一 4^7 li 4 A7 ____^_B7____ 五、發明説明（1 ) 通路，故可有效地防止例如在行駛時輪胎所揚起之水所形成 的泥水的侵入等。 又,傳動箱14通常係爲朝後縮小之構造，而藉由使前述 出口(亦即第2排氣管92之出口 92b)朝後方偏移，可有效率 用後部之開敞之空間，特別是設置第2排氣管92時可不影 響到車輛的後部角。 又，如前述，使第1排氣管91之出口 91b爲二重壁構造, 而於此二重壁之間插入第2排氣管92之入口 92a，故於組裝 時，以構成第1排氣管91之出口 91b之二重壁與第2排氣 管92之入口 92a所畫定之壁，連結部份成爲曲路構造，可有 效防止水自第1排氣管91與第2排氣管92之連結部份侵 入》 經濟部中央標準局員工消費合作社印製 —ί - 11 - m In m "MX/, In - am ϋϋ «^^1 彳 . . (請先閱讀背面之注意事項再填寫本頁) 又，如第4圖所示，於傳動箱14之前述第1排氣管91 之前方上，爲將傳動箱14內之水排出，形成有朝向冷卻風排 氣手段90(第2排氣管92)開口之排水孔95,而如第6圖所 示，在安裝第2排氣管92之狀態下，冷卻風排氣手段90因在 較前述排水孔95更下方之位置上開口，故冷卻風排氣手段 9〇(亦即第2排氣管92)之壁面與前述排水孔95相對，而可 遮蔽排水孔95,於雨天行駛時，可防止自此排水孔95泥水等 倒侵入傳動箱14內。 (有關空氣淨化器之構造） 其次，說明有關傳動箱14之前方所設之空氣淨化器50 〇 第7圖(a)爲自車體左側觀看空氣淨化器50之槪略側 __9_ 本紙張尺度適用中國國家標隼（CNS ) A4規格（210X297公釐） 40711^ Λ7 B7 經濟部中央標準局員工消費合作社印製 五、發明説明（k) 視圖，第7圖(b)爲空氣淨化器50之槪略縱斷面圖，第8圖 (a)(b)爲構成空氣淨化器50之左右蓋片之自分割面觀看之 示意圖。 如第7圖及第8圖所示，空氣淨化器50係由左右分割 之二個蓋片51、52(以下爲說明之便，將車體右側之蓋片稱 爲右側蓋片51，而將車體左側之蓋片稱爲左側蓋片52)，與組 裝時夾穀於此兩蓋片51、52間之濕式元件53所構成，前述 兩蓋片51、52之外面之前側下部上設有多數片冷卻用及防 止石頭打擊用之葉片54 $ 如第8圖所示，於各蓋片51及52上，設有將空氣淨化 室50之內部區畫成將供給至引擎之空氣予以淨化用之第1 淸淨室55與將供給至傳動箱14之冷卻風w予以淨化的第 2淸淨室56之兩者用的間壁57。前述第2淸淨室56係形 成爲順沿於第1淸淨室55之周圍之細長通路狀，以覆蓋第1 淸淨室55之前方、下方及後方之下部。 又，如第8圖(a)所示，右側蓋片51之上壁51a上，設有 連通外部與第1淸淨室55的第1吸入管60,與連通外部與 第2淸淨室56的第2吸入管59,前述第1吸入管60係被引 導部件58所支持,而爲調整引擎Π之吸氣脈動，係延伸至第 1淸淨室55內部。 又，如第8圖(b)所示，左側蓋片52之上壁52a上，設有 連結於引擎11之吸氣系上所設之化油器Ua而自第1淸淨 室55對引擎11供給淸淨後之空氣的第1供給管61，又，左 側蓋片52之後壁52b上，設有連結於傳動箱14之冷卻風導 _10___ 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇X 297公釐) i I ----- III I ..... —n - - - - - - - - — 8i I - . . (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局貝工消費合作社印製 407114 λ7 Β7 五、發明説明（1 ) 入管35而自第2淸淨室56將淸淨後之冷卻風w供給至傳 動箱14內用之第2供給管62。此第2供給管62如第8圖 (b)所示，係以開口於第2淸淨室56之通過第1淸淨室55下 方之部份之較上方之位置上之方式，而於覆蓋第2淸淨室56 之第1淸淨室55之後方下部之部份上，形成朝向斜上方之 開口，藉此，第2淸淨室56自空氣淨化器50之上部前方吸入 空氣，而通過第1空氣淸淨室55之前方及下方，其後,以通過 第1淸淨室55之方式，於朝上方上昇若干後，將冷卻風w朝 斜上方供給至空氣淨化室50之後方上之傳動箱14,而構成 一通路。 如上述構成之右側蓋片51與左側蓋片52如第7圖(b) 所示，於其間，夾持有一個濕式元件53及與該濕式元件53略 同形狀之格子狀之支持骨架53，，並以螺栓65連結成密閉狀 。此元件53係爲板狀，其自側方觀之，係涵蓋空氣淨化器50 之全區。藉此，組立成之空氣淨化器50之內部，第1淸淨室 55及第2淸淨室56係被前述元件53區畫成空氣導入室 55a、56a及空氣供給室55b、56b，其結果，自設於右側蓋片 51之第1及第2吸入管60、59,導入至各淸淨室55、56之 空氣導入室55a、56a之空氣，通過前述濕式元件53而被淨 化後，通過各淸淨室55、56之空氣供給室55b、56b,介以左 側蓋片52上所設之第丨及第2供給管61及62,分別供給至 引擎11及傳動箱14。 又’油料過量侵入於濕式元件53時，於空氣通過濕式元 件53時，於空氣內將有油料飛散，但通過第1清淨室55而供 本紙張尺度適用中國( cNS) A4現格（^幻^公 h _·-- 1_ - -- -II - - - i i- I- - -I In - - 、v'e - - (請先閱讀背面之注意事項再填寫本頁) Λ7 B7 407114 五、發明説明（丨 給至引擎11之空氣中含有油料時，並無問題，又，第2淸淨室 56如前述，一度通過第1淸淨室55之下方後，復上昇，之後 朝斜上方將冷卻風w排出，故比重較高之油料，於冷卻風w 自下方朝上方流動時，以其自重而落下，而積存於第2淸淨室 56之底面，而不會侵入傳動箱14內。 第7圖及第8圖雖未揭示,但箱蓋52之底壁52c上則 形成有長孔，積存於第2淸淨室56之空氣供給室56b之油 料，將自連結於前述長孔之長管63排出至空氣淨化器50外 部。 上述構成之空氣淨化器50之第2吸入管59上，連結著 空氣導入管70,而僅供給至傳動箱14內部之冷卻風w(亦即 通過第2淸淨室56之空氣),係由介以前述空氣導入管70, 自車體罩蓋15之載腳台17之內部所形成之防塵室80所吸 入之外氣所形成。 前述空氣導入管70係由剛性之上流管71與可撓性之 下流管72所構成，前述上流管71係進入於前述防塵室80 內部。 (有關防塵室之構成） 第9圖及第10圖爲車體罩蓋15之防塵室80附近之 槪略縱斷面圖，及部份斷面之槪略上視圖。 如第9圖所示，於車體罩蓋15之載腳台17上之腳踏板 15c與下罩蓋15d所包圍之空間內，形成有以前後之分隔板 81及82所分隔出之防塵室80。 前述分隔板81及82係由可撓性之氯化乙烯板所構成， 12 本紙張尺度適用中國國家標準（〇叫八4規格（21以297公釐) " I? I . - J· — ·:· -II 1 -士义 I -II —^1 I - I I----I^i -° . ' , (请先閱讀背面之注意事項再填寫本頁) 經濟部中央橾準局貝工消費合作社印製 經濟部中央標準局貝工消費合作社印製 407114 五、發明説明（ι 1) 僅上部被以螺栓等適當之手段固定於腳踏板15c上所設之 肋部83、85上，而以懸吊之狀態支持於腳踏板15c上。 又，前述空氣導入管7〇之上流管71係在此防塵室80 之內部以托架73固定於後管2c上。 上述構成之防塵室80上，自前罩蓋15a上方所設之喇 叭用槽(圖未示)及轉向軸3之周圍之空隙進入車體罩蓋15 之內部的空氣，通過前罩蓋15a及前腿擋板15b所形成之轉 向軸3之周圍之空間，及前腿擋板15b及腳踏板15c及下罩 蓋15'd所形成之包圍下管2b及後管2c之空間，而自分隔板 82與後管2c等之間隙進入，故可自車體上方將空氣引入，而 於行駿時，可將不包含路面上所產生之砂石等的粉塵的比較 淸淨之空氣供給至空氣淨化室50之第2淸淨室56,亦即，傳 動箱14內。 (其他適用例） 上述之實施例中，冷卻風排氣手段90係以第1排氣管 91及第2排氣管92於內部形成彎曲狀之通路所構成，但冷 卻風排氣手段90之構成並不只限於本實施例，其出口，與形 成於內部之通路之任意之斷面(相當於本發明中之入口）,只 要爲錯開狀,可任意構成。 又，本實施例中，冷卻風排氣手段90係由第1排氣管91 與第2排氣管92之兩個元件所構成,但其並不只限於本實 施例，其用更多之部件構成亦可，又，與傳動箱14以一體之一 個部件構成亦可。 [發明之效果] ___13____ >紙張尺度適用中國國家標準（CNS ) A4規格Γ210Χ297公釐） "" -I - - I tn - --- I HI - . —1. --- ...... HI I m m3 、v5 . - (請先閲讀背面之注意事項再填寫本頁) A7 B7 407114 五、發明説明（丨Μ 如上述，本發明有關之具備ν皮帶冷卻構造之單元擺 動式引擎，係於將內藏有ν皮帶式動力傳達裝置的傳動箱與 引擎之曲柄箱予一體構成之單元擺動式引擎上，於前述傳動 箱上設置冷卻風導入手段，而於傳動箱之前述冷卻風導入手 段之較後方設置冷卻風排氣手段，而將前述冷卻風排氣手段 構成爲延伸於上下方向上之導管狀，而使其出口朝下方開口’ 同時使其入口與出口爲錯開之位置關係所構成，故可在不減 低傳動箱內之冷卻能力之情形下，以簡單的構成，有效地防止 雨天行駛時之來自輪胎之水花所形成之泥水等侵入傳動箱 內。 [圖示之簡單說明] 第1圖爲採用本發明之空氣淨化器之速克達型機車之槪 略側視圖。 第2圖爲動力單元8之展開斷面圖。 第3圖(a)爲自車體左側觀看之箱蓋14a之槪略側視圖； (b) 爲第3圖⑷之箱蓋14a之A-A斷面圖； (c) 爲第3圖(a)之箱蓋14a之部份B視圖； (d) 爲第3圖(a)之箱蓋14a之C-C斷面圖。 第4圖爲傳動箱之箱蓋片14a之後部之第2圖中之D視 圖。又，本圖中，冷卻風排氣手段90係被分解。 第5圖爲第4圖中之Ε-Ε線斷面圖。 第6圖爲第2圖中之F-F線斷面圖。 第7圖(a)爲空氣淨化器50之自車體左側觀看之槪略側 視圖，(b)爲空氣淨化器50之槪略縱斷面圖。 14 _ _ 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇X：W公麓） L---.------裝----I-訂 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央榡準局貝工消費合作衽印製 407114 五、發明説明（丨1 ) 第8圖(a)及(b)爲構成各空氣淨化器50之左右蓋片之自 分割面觀看之圖。 第9圖爲車體罩蓋15之防塵室80附近之槪略縱斷面圖 第10圖爲車體罩蓋15之防塵室80附近之部份斷面槪略 c 上視圖 0 [符號之說明] 1 速克達型車輛 2 車體骨架 2a 頭管 2b 下管 2c 後管 3 轉向軸 4 把手 5 前輪 6 前叉 7 後輪 8 動力單元 9 連桿手段 10 緩衝單元 11 引擎 11a 化油器 12 曲柄箱 13 V皮帶式動力傳達裝置 15 經濟部中央標準局貝工消費合作社印製 i IL-----裝-- (請先閱讀背面之注意事項再填寫本頁) 本紙浪尺度適用中國國家標準（CNS ) Α4規格（210 X 297公釐） 經濟部中央標準局員工消費合作社印製 407114 A7 B7 五、發明説明（，斗） 14 傳動箱 14a 箱蓋 14b 箱本體 15 車體罩蓋 15a 前罩蓋 15b 前腿擋板 15c 腳踏板 15d 下罩蓋 15e 座墊下罩蓋 15f 側罩蓋(左右一對) 16 座墊 17 載腳台 20 曲柄軸 20a 對接離合器半體 21 驅動皮帶輪 22 V皮帶 23 從動側皮帶輪 24 離心離合器 25 從動軸 26 減速齒輪組 27 後輪驅動軸 28 起動用驅動軸 29 起動用從動軸 30 起動用腳踩桿 l·— I IL* - I I— I I I - n n I T ' - 、1' - - (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（210X297公釐） A7 407114 B7 五、發明説明Οf) 經濟部中央標準局員工消費合作社印装 31 驅動齒輪(引導面） 32 固定齒輪 33 對接離合器半體 35 冷卻風導入管 36 引導面 50 空氣淨化器 51 右側蓋片 51a 上壁 52 左側蓋片 52a 上壁 52b 後壁 53 濕式元件 54 冷卻用及防止石頭打擊用扇葉 55 第1淸淨室(引擎用） 55a 空氣導入室 55b 空氣供給室 56 第2淸淨室(V皮帶用） 56a 空氣導入室 56b 空氣供給室 57 間壁 58 引導部件 59 第2吸入管(V皮帶用） 60 第1吸入管(引擎用） 61 第1供給管(引擎用） 17 -I —l· n - I - n - I I n n T - - U3 、T - (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（210X297公釐） 經濟部中央標準局員工消費合作社印製 407114 Λ7 Β7 五、發明説明（/L) 62 第2供給管(V皮帶用) 63 長管 65 螺栓 70 空氣導入管 71 上流管 72 下流管 80 防塵室 81 分隔板 82 分隔板 90 冷卻風排氣手段 91 第1排氣管 91a 入口 91b 出口 92 第2排氣管 92a 入口 92b 出口 95 排水孔 - 1- I - —ϊ— I— —II -1 . 夕^- 8- · . - -i ..... - I— I ^Ίψ - 、τ - ί (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）407114 at Β7 V. Description of the invention (/) [Detailed description of the invention] [Technical category to which the invention belongs] The present invention relates to the improvement of a V-belt cooling structure on a unit swing engine. [Knowledgeable technology] In the past, engines used in Scooters and other locomotives integrated the engine, the transmission case with the V belt transmission, and one or two rear wheels installed at the rear of the transmission case. The resulting power unit is cooled by a V-belt transmission to improve the durability of the V-belt for power transmission. As the cooling method of the above-mentioned V-belt transmission device, for example, cooling air introduction means and cooling air exhaust means are provided in the transmission box, which introduces outside air into the transmission box and reduces the temperature of the atmosphere in the transmission box. Method β [Problems to be solved by the invention] Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs! -'- II »11— ..... I--j I---I --1 IK m (Please read first Read the precautions on the back and fill in this page again.) As mentioned above, when introducing outside air into the transmission case and reducing the ambient temperature in the transmission case, in order to prevent dust and muddy water from entering the transmission case with the outside air, The means for introducing cooling air is, for example, installing a component at its inlet and covering it with a cover, which is a conventional dust-proof measure. However, in the above-mentioned means for exhausting the cooling air, for example, the exit is directed toward the rear of the vehicle, so when riding on a rainy day, there is a possibility that muddy water and the like may enter from the exit. Therefore, measures for preventing mud, water, and dust are improved Room. The present invention is based on the problem of the V-belt cooling structure on the conventional unit swing engine in order to provide a method that can also be used when riding on a rainy day. 3___ This paper size applies the Chinese National Standard (CNS) A4 specification (210X297). (Chu) Printed by the Masonry Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 4 0 7 j. 1 ^ a 7 B7 V. Description of the Invention (-^) A unit swing type engine with a V-belt cooling structure to prevent muddy water from entering the transmission case. For its purpose. [Means for Solving the Problems] In order to achieve the above-mentioned object, the unit swing type engine having a V-belt cooling structure according to the present invention is integrally formed by a transmission case with a V-belt type power transmission device and a crank case of the engine. On the unit swing type engine, a cooling air introduction means is provided on the aforementioned transmission box, and a cooling air exhaust means is provided at a position rearward of the cooling air introduction means of the transmission case, and the cooling air exhaust means is configured as a crank. Status, so that the entrance and the exit form a staggered relationship. [Implementation Mode of the Invention] Hereinafter, an embodiment mode of a unit swing engine having a V-belt cooling structure according to the present invention will be described with reference to an embodiment shown in the accompanying drawings. (Simplified description of the entire scooter type locomotive) Fig. 1 is a schematic side view of a scooter type locomotive employing a unit swing type engine having a V-belt cooling structure according to the present invention. In the figure, the symbol 1 is a Sukoda locomotive, and the symbol 2 is a car body skeleton. This car body frame 2 includes: a head pipe 2a; after extending from the head pipe 2a toward the rear of the vehicle and obliquely downward, a lower pipe 2b extending to the back slightly and horizontally; and slightly horizontally after the lower pipe 2b After extending backward, a pair of left and right rear pipes 2c that are bent and extend obliquely upward and rearward are bent. The aforementioned head pipe 2a supports a reversible steering shaft 3. The steering shaft 3 is provided with a handle 4 at an upper end thereof, and a pair of left and right front forks 6 supporting the front wheels 5 are fixed at the lower end. ____4__ This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) —r --- 1 _-_---m — ^--II—------- ---- Ding ,, U3, -11 r-(Please read the notes on the back before filling out this page) Printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 407114 at B7 V. Description of the invention (j) Also, on the aforementioned rear tube 2c, refer to The link unit 9 and the buffer unit 10 support the power unit 8 provided with the rear wheels 7 in a swingable manner. This power unit 8 is attached to the crank case 12 of the engine, and is integrally provided with a transmission case 14 containing a V-belt type power transmission device 13 for transmitting the power of the engine 11 to the rear wheels 7, which is also a unit swing engine. . The entire vehicle body frame 2 configured as described above is covered by the vehicle body cover 15 and the seat cushion 17. The vehicle body cover 15 is composed of a front cover 15a, a front leg baffle 15b, a foot pedal 15c, a lower cover 15d, a seat cushion lower cover 15e, and a pair of left and right side covers 15f. The upper part of the cover 15a and the front leg baffle 15b covers the periphery of the head tube 2a, and the lower part of the front leg baffle 15b and the foot pedal 15c and the lower cover 15d cover the front part of the lower tube 2b and the rear tube 2c. The lower cover 15e of the seat cushion, the side covers 15f of the left and right pair, and the seat cushion 16 cover the rear part of the rear tube 2c, and the footrest 15c and the lower cover 15d form the low level between the handle 4 and the seat cushion 16. The shaped foot support 17 〇 The front end of the power unit 8 of the speed locomotive 1 configured as described above is fixed with bolts to the air cleaner 50 so as to be located on the side of the cylinder of the engine 11 of the power unit 8. The air purifier 50 sucks outside air from a dustproof chamber 80 formed around the air cleaner 50 and inside the footrest 17 described later, and after purifying the sucked outside air, it supplies the air sucked from its surroundings to the engine 11, and The air sucked from the dust-proof room 80 is supplied to the transmission case. Hereinafter, the configuration of the air cleaner 50 and the power unit 8 related to the air cleaner 50 and the dust-proof chamber 60 will be described in detail. In the following description, the front-back, left-right, and up-down directions are based on the vehicle body 1. (The composition of the power unit) 5 This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -J--I I---I---I- ------1 Shiyi H— II--.....--I— I, ------(Please read the notes on the back before filling this page) 407114 A7 B7 V. Description of the invention (+) The second picture is Expanded sectional view of the power unit 8. The engine 11 is a horizontal engine with a single cylinder with a two-stroke cylinder connected in front of the crank case 12 and facing the front of the vehicle body. On the left side of the aforementioned crank case 12, a transmission case 14 in which a V-belt type power transmission device 13 is incorporated is integrally provided. This transmission case 14 is provided with a case body 14b integrally formed on the left side of the crank case 12 and a case cover 14a mounted on the outside of the case body 14b. The transmission case 14 extends from the left side of the crank case 12 to the rear. The crank shaft 20 is arranged such that the shaft ends are located in the left-right direction of the vehicle body, and the left side portion thereof protrudes to the inside of the transmission case 14. A portion of the crank shaft 20 protruding from the inside of the transmission case 14 is provided with the drive-side pulley 21 of the aforementioned v-belt type power transmission device 13. The driving pulley 21 is composed of a movable pulley half 21a which is mounted on the crank shaft 20 so as to be slidable in the axial direction, and a fixed pulley half 21b fixed to the crank shaft 20. The fixed pulley half body 21b is provided with a plurality of fan blades 21c on its inner surface, and the cooling air w introduced into the transmission case 14 is sent to the entire transmission case 14 through the air purifier 50, thereby realizing the function as a centrifugal fan. The turning system of the drive-side pulley 21 is transmitted to the driven-side pulley 23 via the V-belt 22, and sequentially transmitted to the driven shaft 25, the reduction gear set 26, and the rear-wheel drive shaft 27 via the centrifugal clutch 24, and the rear wheel 7 drive. A cover 14a of the transmission case 14 is rotatably supported by a starter foot shaft 28 and a starter driven shaft 29 which are free to rotate. Both ends of the starting foot shaft 28 protrude from the outer side and the inner side of the box cover 14a, a foot lever 30 is fixed to the outer end portion, and a fan-shaped driving gear 31 is fixed to the inner end portion. In addition, the starting driven shaft 29 series is supported from the cover Ma to the transmission box 14 ______6___ This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) --I--I 1 -II -i--Shiliang-m-----I •-'' •-ί, (Please read the notes on the back before filling out this page) Printed by A7, Shellfish Consumer Cooperative, Central Bureau of Standards, Ministry of Economic Affairs B7 407114 V. Description of the invention (f) (please read the precautions on the back before filling this page), it can slide in the axial direction, and the driven gear 32 meshing with the driving gear 31 is fixed on the middle part. On the front end portion, a docking clutch half 20a which is detachably fitted with the docking clutch half 20a provided on the left end of the crankshaft 20 is fixed. (Structure of Box Cover 14a) The box cover 14a configured as described above is provided with a cooling air introduction pipe 35 that introduces cooling air from the air purifier 50 and a cooling air exhaust means 90 that discharges the aforementioned cooling air w to the outside. . Fig. 3 (a) is a schematic side view of the box cover 14a viewed from the left side of the vehicle body, and Fig. 3 (b) is an AA cross-sectional view of the box cover 14a in Fig. 3 (a), and Fig. 3 ( c) is a B view of the box cover 14a in FIG. 3 (a), FIG. 3 (d) is a CC sectional view of the box cover 14a in FIG. 3 (a), and FIG. 4 is a transmission box The D view on the second part of the rear view of the box cover 14a, the 5th figure is the EE sectional view in the 4th figure, and the 6th figure is the FF sectional view in the 2nd figure. Printed by the Shellfish Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs As shown in Fig. 3, a cooling air introduction pipe 35 is integrally formed in front of the cover 14a of the transmission case 14. The aforementioned air introduction pipe 35 is the aforementioned centrifugal fan (fixed pulley half) 21b provided inside the transmission box 14 and draws cooling air w into the inside of the transmission box 14 from below, and is located at a lower position before the centrifugal fan 21b, so that The open end 35a is one opened diagonally forward and downward. In addition, as shown in Figs. 2 and 3 (b), the vicinity of the front end of the side wall of the box cover 14a (the shaded moon-shaped portion on Fig. 3 (a)) is recessed into the centrifugation. In the vicinity of the fan blade 21c provided on the fan 21b, a guide surface is formed on the inner surface of the fan blade 21b along a half-circle portion that follows the front side of the centrifugal fan 21b: 36. In addition, the fan-shaped driving gear 31 fixed on the starter foot shaft 28 is also adjacent to 7 paper sizes applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 407114 5. Description of the invention (L) Near the blades of the centrifugal fan 21b, its inner surface functions as a guide surface for a half-circumferential portion on the rear side of the centrifugal fan 21b. -Γ-mV---I ...... II i ^ i -I— in In Ding>-(Please read the precautions on the back before filling this page) So, by using the transmission box 14 and the drive The gear 31 forms the guide surface 36 (31) of the centrifugal fan 21b, and can suck the centrifugal fan 21b from the air cleaner 50 through the cooling air introduction pipe 35 into the cooling air w in the transmission box 14 so as not to escape to the transmission box 14 The method of the box cover 14a side is efficiently sent to the rear of the transmission box 14, that is, along the V belt 22 to the driven side pulley 21 side, and the V belt 22 can be effectively cooled. Again, as shown in Figure 2 to As shown in FIG. 6, a cooling air exhaust means 90 is provided at the rear of the cover 14 a of the transmission case 14. This cooling air exhausting means 90 is particularly shown in Figs. 4 and 5 by a first exhaust pipe 91 integrally formed on the tank cover 14a and a second row attached to the first exhaust pipe 91. The trachea 92 is formed. The inlet 91a of the first exhaust pipe 91 is opened at the middle part of the transmission box 14 in the upper and lower directions, and the outlet 91b is opened at the bottom surface of the transmission box 14. The outlet 91b is formed to connect the second row The double wall structure of the trachea 92. The second exhaust pipe 92 printed by the Employees' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs has an inlet 92a and an outlet 92b that are staggered to form a curved exhaust passage. The inlet 92a is inserted into the transmission case 14 The second exhaust wall of the first exhaust pipe 91 is fixed between the two heavy walls by bolts 94 at the position of the ribs formed in the transmission case 14. With this, the inlet of the cooling air exhaust means 90 (ie, the inlet 91a of the first exhaust pipe 91) and its outlet (ie, the outlet 92b of the second exhaust pipe 92) are formed in a staggered positional relationship because of the internal Formed with a curved exhaust 8 ^ Paper music scale is applicable to Chinese National Standard (CNS) A4 specifications (210x297 mm)-4 ^ 7 li 4 A7 ____ ^ _ B7____ 5. Description of the invention (1), it can be effective The ground prevents, for example, the intrusion of muddy water formed by the water raised by the tire during driving. In addition, the transmission box 14 is generally a structure that is reduced in the rearward direction, and by shifting the aforementioned outlet (that is, the outlet 92b of the second exhaust pipe 92) toward the rear, the open space at the rear can be efficiently used. The second exhaust pipe 92 is provided without affecting the rear corners of the vehicle. As described above, the outlet 91b of the first exhaust pipe 91 has a double wall structure, and the inlet 92a of the second exhaust pipe 92 is inserted between the double walls. Therefore, the first row is formed during assembly. The wall drawn between the double wall of the outlet 91b of the air pipe 91 and the inlet 92a of the second exhaust pipe 92 has a curved structure, which can effectively prevent water from flowing from the first exhaust pipe 91 and the second exhaust pipe. 92 link part invasion "Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs-ί-11-m In m " MX /, In-am ϋϋ« ^^ 1 彳. (Please read the precautions on the back before (Fill in this page) As shown in FIG. 4, a cooling air exhaust means 90 (No. 2 exhaust pipe 92), as shown in FIG. 6, when the second exhaust pipe 92 is installed, the cooling air exhaust means 90 is located at a position lower than the aforementioned drainage hole 95. The opening of the cooling air exhaust means 90 (that is, the second exhaust pipe 92) is opposite to the aforementioned drainage hole 95, and the drainage hole 95 can be shielded. Since the drain hole 95 of muddy water intrusion down gear box 14. (The structure of the air purifier) Next, the air purifier 50 provided in front of the transmission case 14 will be described. Figure 7 (a) is a simplified side of the air purifier 50 viewed from the left side of the vehicle body. __9_ This paper size Applicable to China National Standard (CNS) A4 specification (210X297 mm) 40711 ^ Λ7 B7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. View of the invention (k), Figure 7 (b) shows the air purifier 50 (A) A longitudinal sectional view. FIG. 8 (a) (b) is a schematic view of the left and right cover sheets constituting the air purifier 50 viewed from a divided surface. As shown in FIG. 7 and FIG. 8, the air cleaner 50 is divided into two cover pieces 51 and 52 divided into right and left (hereinafter, for convenience of explanation, the cover piece on the right side of the vehicle body is referred to as the right cover piece 51, and The cover sheet on the left side of the car body is called the left cover sheet 52), and is composed of a wet element 53 sandwiched between the two cover sheets 51 and 52 during assembly. The two cover sheets 51 and 52 are provided on the lower front side of the outer surface. There are many blades for cooling and preventing the impact of stones. 54 $ As shown in FIG. 8, each of the cover pieces 51 and 52 is provided with an inner area of the air purification chamber 50 drawn to purify the air supplied to the engine. A partition wall 57 for both the first cleaning chamber 55 for use and the second cleaning chamber 56 for purifying the cooling air w supplied to the transmission case 14. The second second clean room 56 is formed into an elongated path that runs along the periphery of the first second clean room 55 to cover the front, lower, and lower rear portions of the first second clean room 55. In addition, as shown in FIG. 8 (a), the upper cover 51a of the right side cover 51 is provided with a first suction pipe 60 that communicates the exterior with the first clean room 55, and an exterior that communicates with the second clean room 56 The second suction pipe 59 and the first suction pipe 60 are supported by the guide member 58 and extend to the inside of the first clean room 55 in order to adjust the suction pulsation of the engine Π. In addition, as shown in FIG. 8 (b), the upper wall 52a of the left cover 52 is provided with a carburetor Ua provided on the suction system of the engine 11, and the engine is paired from the first clean room 55 11 The first supply pipe 61 that supplies the cleaned air, and the rear wall 52b of the left cover 52 is provided with a cooling air guide connected to the transmission box _10___ This paper size applies the Chinese National Standard (CNS) A4 specification (21〇X 297 mm) i I ----- III I ..... —n---------8i I-.. (Please read the notes on the back before filling this page ) Printed by Shellfish Consumer Cooperative of Central Standards Bureau of the Ministry of Economic Affairs 407114 λ7 B7 V. Description of the invention (1) Enter the pipe 35 and supply the cleaned cooling air w from the second clean room 56 to the second used in the transmission box 14 Supply pipe 62. As shown in FIG. 8 (b), the second supply pipe 62 covers the upper part of the second clean room 56 and passes through the lower part of the first clean room 55 and covers the upper part. The second clean room 56 has an opening facing obliquely above the first lower clean room 55 behind the first clean room 55. As a result, the second clean room 56 draws in air from the front of the upper part of the air cleaner 50 and passes through it. The first air purifying chamber 55 is positioned forward and downward, and then passes through the first air purging chamber 55. After rising a few upwards, the cooling air w is supplied to the air purifying chamber 50 obliquely upward. The transmission case 14 constitutes a passage. As shown in FIG. 7 (b), the right cover sheet 51 and the left cover sheet 52 configured as described above are sandwiched between a wet element 53 and a grid-shaped supporting frame having a shape substantially the same as the wet element 53. 53, and connected in a closed shape by bolts 65. This element 53 is plate-shaped, and as viewed from the side, it covers the entire area of the air cleaner 50. With this, inside the assembled air cleaner 50, the first clean room 55 and the second clean room 56 are drawn into the air introduction chambers 55a and 56a and the air supply chambers 55b and 56b by the area of the aforementioned element 53. As a result, The air introduced from the first and second suction pipes 60 and 59 provided on the right cover sheet 51 into the air introduction chambers 55a and 56a of the clean rooms 55 and 56 is purified by the wet element 53. The air is supplied to the engine 11 and the transmission case 14 through the air supply chambers 55b and 56b of the cleaning chambers 55 and 56 through the first and second supply pipes 61 and 62 provided on the left cover sheet 52, respectively. Also, when the oil intrudes excessively into the wet element 53, when the air passes through the wet element 53, oil will be scattered in the air, but it will be supplied to this paper through the first clean room 55. China (cNS) A4 is applicable ( ^ 幻 ^ 公 h _ ·-1_---II---i i- I---I In--, v'e--(Please read the notes on the back before filling this page) Λ7 B7 407114 V. Description of the invention (丨 There is no problem when the air to the engine 11 contains oil, and the second clean room 56 is as described above, once it passes below the first clean room 55, then rises again, and then faces The cooling air w is discharged obliquely upward, so the oil with a higher specific gravity will fall under its own weight when the cooling air w flows from below to above, and will accumulate on the bottom surface of the second clean room 56 without invading the transmission case. Inside 14. Although not shown in Figures 7 and 8, long holes are formed in the bottom wall 52c of the box cover 52, and the oil stored in the air supply chamber 56b of the second clean room 56 will be self-connected to the aforementioned The long pipe 63 with a long hole is discharged to the outside of the air cleaner 50. The second suction pipe 59 of the air cleaner 50 configured as described above is connected to the air introduction pipe 7 0, and only the cooling air w supplied to the inside of the transmission box 14 (that is, the air passing through the second clean room 56) is from the inside of the footrest 17 of the vehicle body cover 15 through the aforementioned air introduction pipe 70 The formed dust-proof room 80 is formed by drawing in outside air. The air introduction pipe 70 is composed of a rigid upflow tube 71 and a flexible downflow tube 72, and the upflow tube 71 is entered into the dust-proof room 80. (Construction of the dustproof room) Figures 9 and 10 are a schematic longitudinal sectional view of the vicinity of the dustproof room 80 of the vehicle body cover 15 and a schematic top view of a partial cross section. As shown in Figure 9 In the space surrounded by the footrest 15c and the lower cover 15d on the footrest 17 of the vehicle body cover 15, a dustproof room 80 formed by front and rear partition plates 81 and 82 is formed. The partitions 81 and 82 are made of flexible vinyl chloride sheet. 12 paper sizes are applicable to the Chinese national standard (〇 called 8 4 specifications (21 to 297 mm) " I? I.-J · — · · : · -II 1 -Shiyi I -II — ^ 1 I-I I ---- I ^ i-°. ', (Please read the notes on the back before filling this page) Work Printed by a fee cooperative, printed by the Central Standards Bureau of the Ministry of Economics, printed by the Shellfish Consumer Cooperative, 407114 V. Description of the invention (ι 1) Only the upper part is fixed to the ribs 83, 85 provided on the foot pedal 15c by appropriate means such as bolts, The suspension is supported on the footrest 15c. The above-mentioned air introduction pipe 70 upstream pipe 71 is fixed inside the dustproof room 80 by a bracket 73 and fixed to the rear pipe 2c. In the dustproof room 80 configured as above, the air entering the interior of the vehicle body cover 15 from the horn groove (not shown) provided above the front cover 15a and the space around the steering shaft 3 passes through the front cover 15a and the front The space around the steering shaft 3 formed by the leg baffle 15b, and the space surrounding the lower tube 2b and the rear tube 2c formed by the front leg baffle 15b, the foot pedal 15c, and the lower cover 15'd are self-separated. The gap between the plate 82 and the rear pipe 2c enters, so that air can be introduced from above the vehicle body, and when traveling, it can supply relatively clean air that does not include dust and other dust generated on the road to the air. The second clean room 56 of the clean room 50, that is, the inside of the transmission case 14. (Other application examples) In the above-mentioned embodiment, the cooling air exhausting means 90 is constituted by the first exhaust pipe 91 and the second exhaust pipe 92 forming a curved passage inside, but the cooling air exhausting means 90 The configuration is not limited to this embodiment, and the exit and any cross section of the passage formed in the interior (equivalent to the entrance in the present invention) can be arbitrarily configured as long as they are staggered. Also, in this embodiment, the cooling air exhausting means 90 is composed of two elements of the first exhaust pipe 91 and the second exhaust pipe 92, but it is not limited to this embodiment, and it uses more components It may be configured as a single component integral with the transmission case 14. [Effect of the invention] ___13____ > Paper size applies Chinese National Standard (CNS) A4 specification Γ210 × 297 mm) " " -I--I tn---- I HI-. —1. ---... ... HI I m m3, v5.-(Please read the precautions on the back before filling this page) A7 B7 407114 V. Description of the invention (丨 M As mentioned above, the unit with ν belt cooling structure related to the present invention has a swinging type The engine is a unit swing type engine in which a transmission case with a ν belt-type power transmission device and a crank case of the engine are integrated. A cooling air introduction means is provided on the transmission case, and the aforementioned cooling of the transmission case is provided. The cooling air exhausting means is provided at the rear of the wind introduction means, and the cooling air exhausting means is configured in a duct shape extending in the up-down direction so that the outlet thereof opens downwards, and the inlet and outlet thereof are staggered. Due to the relationship, the simple structure can effectively prevent muddy water formed by water splashes from tires and the like from entering the transmission case without reducing the cooling capacity in the transmission case. [Ming] Figure 1 is a schematic side view of a speed locomotive using the air purifier of the present invention. Figure 2 is a developed sectional view of the power unit 8. Figure 3 (a) is viewed from the left side of the vehicle body (B) is a cross-sectional view of the box cover 14a of FIG. 3 (a); (c) is a view of part B of the box cover 14a of FIG. 3 (a); (d) ) Is a CC sectional view of the box cover 14a in Fig. 3 (a). Fig. 4 is a D view in the second view of the rear part of the box cover piece 14a of the transmission box. Also, in this figure, the cooling air exhaust Means 90 is disassembled. Fig. 5 is a cross-sectional view taken along the line E-E in Fig. 4. Fig. 6 is a cross-sectional view taken along the line FF in Fig. 2. Fig. 7 (a) is an air purifier 50. A side view of the vehicle viewed from the left side of the vehicle body, (b) is a schematic longitudinal sectional view of the air purifier 50. 14 _ _ This paper size applies to China National Standard (CNS) A4 (21〇X: W) ) L ---.------ Installation ---- I-Order (please read the notes on the back before filling this page) Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Shellfish Consumer Cooperation, printed 407114 V. Invention Explanation (丨 1) Figures 8 (a) and (b) show the left and right covers of each air purifier 50. The figure viewed from the split plane. FIG. 9 is a schematic longitudinal cross-sectional view of the vicinity of the dustproof room 80 of the vehicle body cover 15 and FIG. 10 is a partial cross-sectional view of the vicinity of the dustproof room 80 of the vehicle body cover 15 Top view 0 [Explanation of symbols] 1 Sukhtar vehicle 2 Body frame 2a Head tube 2b Down tube 2c Rear tube 3 Steering shaft 4 Handle 5 Front wheel 6 Front fork 7 Rear wheel 8 Power unit 9 Link means 10 Buffer unit 11 Engine 11a Carburetor 12 Crankbox 13 V Belt-type power transmission device 15 Printed by IL Engineering Co., Ltd. of the Central Standards Bureau of the Ministry of Economic Affairs i ----- install-(Please read the precautions on the back before filling this page ) This paper scale is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm). Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. 407114 A7 B7 V. Description of the invention (, bucket) 15 Body cover 15a Front cover 15b Front leg bezel 15c Foot pedal 15d Lower cover 15e Seat cushion lower cover 15f Side cover (a pair of left and right) 16 Seat cushion 17 Footrest 20 Crankshaft 20a Docking clutch Half body 21 drive pulley 22 V Belt 23 Driven side pulley 24 Centrifugal clutch 25 Driven shaft 26 Reducer gear set 27 Rear wheel drive shaft 28 Starter drive shaft 29 Starter driven shaft 30 Starter foot lever l · — I IL *-II— III- nn IT '-, 1'--(Please read the notes on the back before filling in this page) This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) A7 407114 B7 V. Description of the invention 〇f) Ministry of Economy Printed by the Consumer Standards Cooperative of the Central Bureau of Standards 31 Drive gear (guide surface) 32 Fixed gear 33 Docking clutch half 35 Cooling air introduction pipe 36 Guide surface 50 Air purifier 51 Right side cover piece 51a Upper wall 52 Left side cover piece 52a Upper wall 52b Rear wall 53 Wet element 54 Fan blades for cooling and preventing stone blow 55 First clean room (for engine) 55a Air introduction room 55b Air supply room 56 Second clean room (for V belt) 56a Air introduction room 56b Air supply chamber 57 Partition wall 58 Guide member 59 Second suction pipe (for V-belt) 60 First suction pipe (for engine) 61 First supply pipe (for engine) 17 -I —l · n-I-n-II nn T--U3, T-(Please read the notes on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 (210X297 mm) Printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 407114 Λ7 Β7 V. Description of the invention (/ L) 62 Second supply pipe (for V belt) 63 Long pipe 65 Bolt 70 Air introduction pipe 71 Upstream pipe 72 Downstream pipe 80 Dustproof room 81 Sub-partition 82 Sub-partition 90 Cooling air exhaust means 91 1st exhaust pipe 91a inlet 91b outlet 92 2nd exhaust pipe 92a inlet 92b outlet 95 drainage hole-1- I--ϊ- I- -II -1. Xi ^-8- ·.--I .. ...-I— I ^ Ίψ-, τ-ί (Please read the notes on the back before filling this page) This paper size applies to China National Standard (CNS) Α4 size (210X297 mm)