(1) 1276568 九、發明說明 【發明所屬的技術領域】 #發明是關於’在車體框架的前方搭載著油箱，該車 體框架在前端具有：可轉向地支承著前叉的頭管，該前叉 軸支承著前輪，在配置於較油箱更後方處的乘車用座墊、 與油箱之間，形成了從側面觀察爲略U字型的跨腳空間， 與搭載於車體框架的引擎相連之構成進氣系統的一部分的 Φ空氣濾清器，是配置於油箱的下方之機車。 【先前技術】 這種機車，例如在專利文獻〗所習知的構造。 [專利文獻1] 曰本特開2004 — 116423號公報 【發明內容】 φ [發明欲解決的課題] 在上述專利文獻1所揭示的機車，在油箱下方所配置 的空氣濾清器的濾清器殻體的右側面，是設置有：用來更 換在濾清器殻體內所收容的濾清器濾心的濾心更換窗部。 在這種機車，是一般的以車體外殼來覆蓋空氣濾清器的兩 側的構造，而在如上述的在濾清器殻體的一側面設置有濾 心更換窗部的構造，在濾清器殻體的側邊需要確保有可將 濾清器濾心進行拆卸的開口空間，所以對車體框架的佈置 就會產生限制，例如有時候想要在濾清器殻體的側邊配置 -4- 1276568(1) 1276568 IX. Description of the Invention [Technical Fields of the Invention] The invention relates to 'the fuel tank is mounted in front of the vehicle body frame, and the vehicle body frame has a head pipe that steerably supports the front fork at the front end, The front fork shaft supports the front wheel, and the seat cushion and the oil tank which are disposed behind the oil tank form a cross-foot space which is slightly U-shaped from the side, and an engine mounted on the vehicle body frame The Φ air cleaner that is connected to form part of the intake system is a locomotive that is disposed below the fuel tank. [Prior Art] This type of locomotive is, for example, a structure known in the patent literature. [Patent Document 1] JP-A-2004-116423 SUMMARY OF INVENTION [Problem to be Solved by the Invention] In the locomotive disclosed in Patent Document 1, the filter of the air cleaner disposed below the fuel tank The right side surface of the casing is provided with a filter center replacement window for replacing the filter element contained in the filter housing. In this type of locomotive, a structure in which the outer side of the air cleaner is covered by the outer casing of the vehicle body is generally provided, and in the above-described configuration in which a filter core replacement window portion is provided on one side of the filter housing, The side of the cleaner housing needs to ensure that there is an open space for the filter filter to be removed, so there is a limit to the arrangement of the body frame, for example, sometimes you want to configure the side of the filter housing. -4- 1276568
車體框架的補強構件卻沒有辦法配置，在車體側面的外觀 δ又S十就會受到限制。而且是從車體側邊更換濾清器濾心， 所以當停車而車體側邊沒有多餘的空間時，就會很難進行 濾清器濾心的更換作業。 本發明，鑑於這種情形，其目的要提供一種機車，能 夠提高：車體框架的佈置及車體側面的外觀設計的自由度 ’且不會受到停車場合的影響，而能容易地更換濾清器濾 [用以解決課題的手段] 爲了達成上述目的，第1發明，在車體框架的前部搭 載著油箱，該車體框架在前端具有：可轉向地支承著前叉 的頭管，該前叉軸支承著前輪，在配置於較油箱更後方處 的乘車用座墊、與上述油箱之間，形成了從側面觀察爲略 ϋ字型的跨腳空間，與搭載於上述車體框架的引擎相連之 φ構成進氣系統的一部分的空氣濾清器，是配置於油箱的下 方之機車，在上述空氣濾清器的濾清器殼體，是設置有： 面對於跨腳空間側，而用來更換在該濾清器殼體內所收容 的濾清器濾心的濾心更換窗部。 第2發明，是針對上述第1發明，上述濾清器殻體的頂 壁部，是形成爲··與上述油箱的底壁部相對向且朝前後大 致水平地延伸，上述濾清器濾心，是可從上述濾心更換窗 部大致水平地抽出地，以與上述頂壁部相對向的大致水平 的姿勢被配置於濾清器殻體內。 -5- (3) 1276568 第3發明，是針對上述第1或2發明，上述空氣濾清器 的濾清器殼體，是形成爲：其前後方向的長度大於其上下 方向的長度。 [發明效果] / 藉由第1發明，當要更換空氣濾清器的濾清器濾心時 /，由於是將面對於跨腳空間側的濾心更換窗部設置在濾清 φ 器殻體，所以即使停車在側邊沒有多餘空間的場合，在濾 心更換窗部開啓的狀態，就能容易地從跨腳空間側更換濾 清器濾心。而在濾清器殼體的側邊就不需要確保用來拆卸 濾清器濾心的開口空間，所以可以增加：車體框架的佈置 及車體側面的外觀設計的自由度。 藉由第2發明，能夠有效率地配置油箱及空氣濾清器 ，且能充分地確保其容量，並且能維持更換的容易性，而 能將濾心更換窗部的開口面積作得較小。 φ 藉由第3發明，能充分地確保空氣濾清器的容量，而 能有效率地配置濾清器濾心，並且能有效率地配置周邊的 組成構件。 【實施方式】 第1圖〜第11圖是顯示本發明的第一實施例，第1圖是 速克達型機車的側面圖，第2圖是將機車的前部放大顯示 的縱剖側面圖，第3圖是省略了進氣系統的狀態的動力單 元的俯視圖，第4圖是從第3圖的箭頭4方向觀察的圖面， -6 - (4) 1276568 第5圖是從第3圖的箭頭5方向觀察的圖面，第6圖是第1圖 的6-6線放大剖面圖，第7圖是空氣濾清器附近的放大縱剖 面圖，第8圖是在省略了油箱的狀態的沿著第7圖的8-8線 的剖面圖，第9圖是頭管附近的局部缺口側面圖，第1 〇圖 是將速克達型機車的後部放大顯示的縱剖側面圖，第Π圖 是第1 0圖的1 1 · 1 1線剖面圖。 首先在第1圖，該速克達型機車的車體框架F，是具備 φ 有：將軸支承著前輪WF的前叉15及連結於該前叉15的轉 向車把16可轉向地予以支承的頭管17、從該頭管17朝向斜 後下方延伸的左右的一對下管18.......在該下管18……的 下方連接設置於上述頭管17，並且相較於兩下管18……以 較陡的傾斜度朝斜後下方延伸的左右的一對低管1 9....... 以及連接設置於該低管1 9……的下端而朝後方延伸，並且 將上述兩下管18……的後端連接設置於中間部的左右的一 對主管2 0……。 φ 在上述低管19……的下端是接合著引擎托架19a…… ，該引擎托架19a……是朝向該低管19……的延長方向延 伸。上述主管20......，是從低管19......及引擎托架19a… …的接合部附近朝後方延伸，在該實施例，引擎托架19a ......是具有作爲主管2 0......的朝向低管1 9......的下端的連 結構件的機能。在左右成對的下管1 8……及低管1 9……的 中間部之間，設置有補強用連結板2 1……。 合倂參照第2圖，上述主管20，是將：從上述低管1 9 的下端朝向斜後上方延伸的前半傾斜部20a、朝斜後下方 (5) 1276568 延伸的後半傾斜部20b、以及朝上方膨脹般地彎曲而將前 半傾斜部20a的後端及後半傾斜部20b的前端間予以連結的 彎曲部20c，一體地相連所構成的，如後述的第4圖所揭示 ’是由其上下方向較左右方向更長的略直角四邊形的方筒 所構成。並且，在上述前半傾斜部20a的中間部，是藉由 焊接方式，連接設置著上述下管18的下端。 在上述後半傾斜部20b的前部，是藉由焊接方式，接 φ 合著連結板22，將朝向斜後上方延伸的座墊軌道23的前端 連結在上述連結板22，左右的一對座墊軌道23……的後部 是相互地連結成一體。並且在該實施例，上述連結板22的 前端側的一部分是配置成靠在彎曲部20c，藉此則可以有 效率地將連結板22及座墊軌道23結合在主管20的後半傾斜 部20b的前部。而在座墊軌道23……的後部，是分別藉由 焊接方式，接合著：將前端接合在後半傾斜部20b的後端 而朝斜後上方延伸的後管24……的後端。並且在左右成對 φ的座墊軌道23……及後管24……的中間部之間，是設置有 補強用連結板2 5....... 在第3圖〜第5圖，在車體框架F，爲了驅動後輪WR而 搭載著動力單元P，該動力單元P，是由：四行程引擎E、 及將該引擎E的輸出予以變速的無段變速機Μ所構成。上 述引擎Ε，是以例如水冷式雙氣缸的V形構造所構成，是 具有：曲軸箱28、具有稍微朝斜前上方前傾的氣缸軸線， 從曲軸箱28朝前方延伸的前排氣缸BF、以及與該前排氣 缸BF構成V形，而從上述曲軸箱28朝上方延伸的後排氣缸 1276568There is no way to configure the reinforcing members of the body frame, and the appearance of the side of the car body δ and S will be limited. Moreover, the filter filter is replaced from the side of the vehicle body, so when there is no extra space on the side of the vehicle body when parking, it is difficult to replace the filter filter. The present invention, in view of such a situation, aims to provide a locomotive that can improve the degree of freedom of the arrangement of the vehicle body frame and the design of the side of the vehicle body' without being affected by the parking lot, and can be easily replaced with the filter. In order to achieve the above object, in a first aspect of the invention, a fuel tank is mounted on a front portion of a vehicle body frame, and the vehicle body frame has a head pipe rotatably supporting a front fork at a front end thereof. The front fork shaft supports the front wheel, and a seat cushion that is disposed at a position further rearward of the oil tank and the fuel tank forms a cross-foot space that is slightly curved from the side, and is mounted on the vehicle body frame. The engine connected to the φ constitutes an air cleaner that is part of the intake system, and is a locomotive disposed below the fuel tank. The filter housing of the air cleaner is provided with: a surface for the side of the foot space, And a filter replacement window for replacing the filter cartridge housed in the filter housing. According to a second aspect of the invention, in the first aspect of the invention, the top wall portion of the filter case is formed to face the bottom wall portion of the oil tank and extend substantially horizontally forward and backward, and the filter element is The filter-replacement window portion is substantially horizontally extracted, and is disposed in the filter housing in a substantially horizontal posture facing the top wall portion. In the first or second aspect of the invention, the filter case of the air cleaner is formed such that the length in the front-rear direction is longer than the length in the vertical direction. [Effect of the Invention] According to the first aspect of the invention, when the filter element of the air cleaner is to be replaced, the filter replacement body is provided in the filter φ housing in the side of the space on the side of the foot. Therefore, even if there is no extra space on the side of the parking, the filter filter can be easily replaced from the side of the footrest space when the filter replacement window is opened. On the side of the filter housing, there is no need to ensure the opening space for disassembling the filter element, so that the arrangement of the body frame and the freedom of design of the side of the vehicle body can be increased. According to the second aspect of the invention, the fuel tank and the air cleaner can be efficiently disposed, and the capacity can be sufficiently ensured, and the ease of replacement can be maintained, and the opening area of the filter-replacement window portion can be made small. According to the third aspect of the invention, the capacity of the air cleaner can be sufficiently ensured, the filter filter can be efficiently disposed, and the peripheral component members can be efficiently disposed. [Embodiment] Figs. 1 to 11 are views showing a first embodiment of the present invention. Fig. 1 is a side view of a Scooter type locomotive, and Fig. 2 is a longitudinal sectional side view showing an enlarged front portion of the locomotive. Fig. 3 is a plan view of the power unit in which the state of the intake system is omitted, and Fig. 4 is a view of the plane viewed from the direction of arrow 4 in Fig. 3, -6 - (4) 1276568 Fig. 5 is from Fig. 3. Fig. 6 is an enlarged cross-sectional view taken along line 6-6 of Fig. 1, Fig. 7 is an enlarged longitudinal sectional view of the vicinity of the air cleaner, and Fig. 8 is a state in which the fuel tank is omitted. A cross-sectional view taken along line 8-8 of Fig. 7, Fig. 9 is a side view of a partial notch near the head pipe, and a first side view is a longitudinal sectional side view showing an enlarged rear portion of the skating type locomotive, The map is a 1 1 · 1 1 line cross-sectional view of Figure 10. First, in the first embodiment, the body frame F of the scooter type locomotive includes a front fork 15 that supports the front wheel WF and a steering handlebar 16 that is coupled to the front fork 15 to be steerably supported. The head pipe 17 and the pair of right and left lower pipes 18 extending from the head pipe 17 toward the lower rear side are connected to the head pipe 17 under the lower pipe 18, and are compared The left and right tubes 18 are arranged on the left and right sides of the lower tube 1 9 ... with a steep inclination toward the lower rear side and the lower end of the lower tube 1 9 ... Extending, and connecting the rear ends of the above-mentioned two lower tubes 18... to the left and right pair of main tubes 20 in the middle portion. φ is at the lower end of the lower pipe 19... joined to the engine bracket 19a, ... which extends in the direction in which the lower pipe 19... extends. The above-mentioned main pipe 20... extends rearward from the vicinity of the joint portion of the low pipe 19 and the engine bracket 19a, in this embodiment, the engine bracket 19a ..... It is a function of a joint member which is a lower end of the low pipe 1 9 ... as the main pipe 2 0 . Between the right and left pairs of the lower tubes 1 8 ... and the intermediate portions of the low tubes 1 9 ..., the reinforcing connecting plates 2 1 ... are provided. Referring to Fig. 2, the main pipe 20 is a front half inclined portion 20a extending obliquely rearward from the lower end of the lower pipe 19, a rear half inclined portion 20b extending obliquely rearward (5) 1276568, and The curved portion 20c that is bent in the upward direction and is connected to the front end of the front half inclined portion 20a and the front end of the rear half inclined portion 20b is integrally connected, as shown in FIG. 4 to be described later, It is composed of a square tube with a slightly right-angled quadrilateral longer than the left and right direction. Further, in the intermediate portion of the front half inclined portion 20a, the lower end of the lower tube 18 is connected by welding. In the front portion of the rear half inclined portion 20b, the connecting plate 22 is joined by φ, and the front end of the seat rail 23 extending obliquely upward and rearward is coupled to the connecting plate 22, and a pair of left and right seat cushions are provided. The rear portions of the rails 23 are integrally connected to each other. Further, in this embodiment, a part of the distal end side of the connecting plate 22 is disposed to lean against the curved portion 20c, whereby the connecting plate 22 and the seat cushion rail 23 can be efficiently coupled to the rear half inclined portion 20b of the main pipe 20. Front section. On the rear side of the seat cushion rails 23, respectively, the rear ends of the rear tubes 24, which are joined to the rear end of the rear half inclined portion 20b and which extend obliquely rearward and upward, are joined by welding. Further, between the seat cushion rails 23 of the right and left pairs φ and the intermediate portion of the rear tube 24, the reinforcing connecting plate 2 is provided. 5. In the third to fifth figures, In the vehicle body frame F, a power unit P is mounted to drive the rear wheel WR. The power unit P is composed of a four-stroke engine E and a stepless speed changer that shifts the output of the engine E. The engine block is configured by, for example, a V-shaped structure of a water-cooled two-cylinder, and has a crankcase 28, a cylinder axis having a cylinder axis that is slightly inclined forwardly toward the front, and a front bank BF extending forward from the crankcase 28, And a rear cylinder 1276568 which is formed in a V shape with the front exhaust cylinder BF and extends upward from the crankcase 28
B R ;上述各氣缸B F、B R，是分別具備有：結合於曲軸箱 28的氣缸體29F、29R、在曲軸箱28的相反側，與氣缸體 2 9F、2 9R結合的氣缸頭30F、30R、以及結合於氣缸頭30F 、3〇]1的頂部的氣缸頭罩蓋31?、3111。 在上述車體框架F的下管18......的下端附近且在上述 兩主管2 0......的前半傾斜部2 0 a......，設置有第一引擎懸 架32......，在上述引擎E的前排氣缸及後排氣缸BF、BR之 φ 間，是將曲軸箱2 8的上部支承在第—引擎懸架3 2......。後 排氣缸BR，是配置於兩主管20......的彎曲部20c……之間 。在與低管19......的下端相連的引擎托架19a......的下端 ，以一對螺栓43……安裝著第二引擎懸架33……，在前排 氣缸BF的下方的上述曲軸箱28的下部，是以螺栓44鎖裝 支承於第二引擎懸架33....... 以這種方式’可以在剛性較高的部分，將引擎E支承 在兩主管20......，藉由從兩側夾著上述下管18......的中心 φ線的延長線的一對螺栓26……的鎖裝，來將第一引擎懸架Each of the cylinders BF and BR is provided with cylinder blocks 29F and 29R coupled to the crankcase 28, cylinder heads 30F and 30R coupled to the cylinder blocks 2 9F and 29R on the opposite side of the crankcase 28, and And a cylinder head cover 31?, 3111 coupled to the top of the cylinder heads 30F, 3?]. In the vicinity of the lower end of the lower tube 18 of the above-described vehicle body frame F, and at the front half inclined portions 20a of the two main pipes 20... The engine suspension 32 ... is between the front row cylinders of the engine E and the rear cylinders BF, BR φ, the upper portion of the crankcase 28 is supported by the first engine suspension 3 2..... . . . The rear exhaust cylinders BR are disposed between the curved portions 20c of the two main pipes 20.... At the lower end of the engine bracket 19a... connected to the lower end of the low pipe 19, a second engine suspension 33 is mounted by a pair of bolts 43... in the front bank BF The lower portion of the crankcase 28 below is locked and supported by the second engine suspension 33 by bolts 44. In this way, the engine E can be supported by the two main engines in a relatively rigid portion. 20... The first engine suspension is locked by a pair of bolts 26 ... which are extended from the extension lines of the center φ line of the lower tube 18...
32......設置在兩主管20......的前半傾斜部20a，上述引擎E 的曲軸箱28，是藉由配置在上述下管......的中心線的延 長線上的螺栓27的鎖裝’而被支承在第一引擎懸架32...... ，能夠以更有效率且剛性更好的方式’將曲軸箱2 8支承在 第一引擎懸架32....... 在第6圖，可自由旋轉地被支承於曲軸箱28的曲軸34 ，是一體地具備有··一對曲軸臂34a、34a、以及連結於該 曲軸臂34a、34a之間的曲軸銷34b’可自由滑動地嵌合於 (7) 1276568 上述兩氣缸BF、BR的氣缸體29F、29R的活塞35...... ’是 經由連桿36……，而連結在上述兩曲軸臂34a、34a之間的 曲軸銷34b。 在沿著機車的行進方向的左側，曲軸3 4的其中一端部 是從曲軸箱28突出，是以：固定於該曲軸34的其中一端部 的轉子3 7、以及收容於該轉子3 7內的定子3 8，構成了 AC 發電機39，該AC發電機39，是以結合於曲軸箱28的左外 φ 殼40所覆蓋，上述定子38是被固定在左外殼40。 在上述兩氣缸BF、BR的氣缸頭30F、30R配設有進氣 閥及排氣閥（沒有圖示），在用來開閉驅動上述進氣閥及排 氣閥而構成閥門裝置的一部分，且可自由旋轉地被支承於 上述兩氣缸頭30?、3011的凸輪軸4卜"〜、以及上述曲軸 箱28及AC發電機間的曲軸34之間，是設置有定時傳動裝 置42，曲軸34的旋轉動力，會被上述定時傳動裝置42減速 1/2然後傳達到上述凸輪軸41……。 φ 在沿著機車的行進方向的右側的上述曲軸箱2 8，是連 結著··從該曲軸箱28朝後方延伸的曲軸箱主體45，是以： 鎖裝於該曲軸箱主體45的右側的右外殼46、鎖裝於上述曲 軸箱主體45的後部右側的齒輪箱47、以及上述曲軸箱主體 45，構成了變速機殼體48;在曲軸箱主體45及右外殼46之 間形成有變速室49 ’在曲軸箱主體45及齒輪箱47之間形成 了齒輪室50。 在上述變速機殼體48的變速室49，是收容著：將曲軸 34的旋轉動力無階段地變速然後傳達到後輪側的皮帶式的 -10- 127656832... disposed in the front half inclined portion 20a of the two main pipes 20..., the crankcase 28 of the engine E is disposed on the center line of the lower pipe... The locking of the bolts 27 on the extension cord is supported by the first engine suspension 32 ... to support the crankcase 28 in the first engine suspension 32 in a more efficient and rigid manner. In the sixth diagram, the crankshaft 34 rotatably supported by the crankcase 28 is integrally provided with a pair of crank arms 34a and 34a and coupled to the crank arms 34a and 34a. The crank pin 34b' is slidably fitted to the (7) 1276568. The pistons 35 of the cylinder blocks 29F and 29R of the two cylinders BF and BR are ... via the connecting rods 36... The crank pin 34b between the two crank arms 34a, 34a. On the left side of the traveling direction of the locomotive, one end portion of the crankshaft 34 protrudes from the crankcase 28, and is a rotor 37 fixed to one end portion of the crankshaft 34, and housed in the rotor 37. The stator 3 8 constitutes an AC generator 39 which is covered by a left outer φ shell 40 coupled to the crankcase 28, and the stator 38 is fixed to the left outer casing 40. An intake valve and an exhaust valve (not shown) are disposed in the cylinder heads 30F and 30R of the two cylinders BF and BR, and the intake valve and the exhaust valve are opened and closed to form a part of the valve device, and Between the camshaft 4 of the two cylinder heads 30?, 3011, and the crankshaft 34 between the crankcase 28 and the AC generator, the timing transmission 42 is provided freely rotatably. The rotational power is decelerated by 1/2 of the timing actuator 42 and then transmitted to the camshaft 41... φ The crankcase 2 8 on the right side of the traveling direction of the locomotive is a crankcase main body 45 connected to the rear of the crankcase 28, and is locked to the right side of the crankcase main body 45. The right outer casing 46, the gear case 47 locked to the right rear side of the crankcase main body 45, and the crankcase main body 45 constitute a transmission case 48; a shifting chamber is formed between the crank case main body 45 and the right outer casing 46. 49' A gear chamber 50 is formed between the crankcase main body 45 and the gear case 47. The shifting chamber 49 of the above-described transmission case 48 accommodates a belt type that shifts the rotational power of the crankshaft 34 steplessly and transmits it to the rear wheel side. -10- 1276568
無段變速機Μ。該無段變速機Μ，是具備有：面對於變速 室49內而安裝於曲軸34的另一端部的驅動皮帶輪51、具有 與曲軸34平行的軸線，在可自由旋轉地被支承於變速機殻 體4 8的後部的傳動軸5 4的面對於變速室4 9內的部分所安裝 的從動皮帶輪5 2、以及繞掛於驅動皮帶輪5 1及從動皮帶輪 52的循環式的皮帶53。 驅動皮帶輪51，是藉由沒有圖示的電動馬達等的作動 φ ，藉由可朝上述曲軸34的軸方向滑動的滑筒56的滑動動作 ，來使上述皮帶5 3的繞掛半徑變化。而從動皮帶輪5 2，是 因應於以驅動皮帶輪5 1讓皮帶5 3的繞掛半徑產生的變化， 來使繞掛半徑朝向驅動皮帶輪5 1的相反側變化，在該從動 皮帶輪52及傳動軸54之間是中介安裝著離心離合器55。 上述傳動軸54的另一端側，是配置面對於齒輪室50， 具有與該傳動軸54平行的軸線的輸出軸57，是可自由旋轉 地被支承在曲軸箱主體45及齒輪箱47，在齒輪室50，是收 φ容著：將上述傳動軸5 4的旋轉動力減速而傳達到上述輸出 軸5 7的減速齒輪組5 8。而上述輸出軸5 7的其中一端部，是 貫穿於齒輪箱47的後部，而從齒輪箱47的後部左側突出。 後輪WR的車軸59，是被軸支承在搖臂60的後部，在 該搖臂60的前端，是設置有一對支承腕部60a、60b，該支 承腕部60a、60b是相互地夾著··構成上述變速機殼體48的 一部分的曲軸箱主體45及齒輪箱47的後部之間。而其中一 個支承腕部60a，是可相對於上述輸出軸57自由轉動地被 支承著，另一個支承腕部60b，是與上述輸出軸57同軸， -11 - 1276568Stepless speed changer Μ. The stepless transmission Μ is provided with a drive pulley 51 that is attached to the other end of the crankshaft 34 in the shift chamber 49, and has an axis parallel to the crankshaft 34, and is rotatably supported by the transmission case. The driven shaft 51 of the rear portion of the body 48 has a driven pulley 52 mounted to a portion of the shifting chamber 49, and a circulating belt 53 wound around the driving pulley 51 and the driven pulley 52. The drive pulley 51 changes the winding radius of the belt 53 by the sliding operation of the slider 56 slidable in the axial direction of the crankshaft 34 by the operation φ of an electric motor or the like (not shown). The driven pulley 52 is adapted to change the winding radius of the belt 5 3 by the driving pulley 5 1 to change the winding radius toward the opposite side of the driving pulley 51, in the driven pulley 52 and the transmission. A centrifugal clutch 55 is interposed between the shafts 54. The other end side of the transmission shaft 54 is an output shaft 57 having an arrangement surface with respect to the gear chamber 50 and having an axis parallel to the transmission shaft 54, and is rotatably supported by the crankcase main body 45 and the gear case 47. The chamber 50 is a reduction gear group 58 that transmits the rotation power of the transmission shaft 54 to the output shaft 57. One end portion of the output shaft 57 is inserted through the rear portion of the gear case 47 and protrudes from the rear left side of the gear case 47. The axle 59 of the rear wheel WR is pivotally supported at the rear of the rocker arm 60. At the front end of the rocker arm 60, a pair of support arms 60a, 60b are provided, and the support arms 60a, 60b are interposed therebetween. The crankcase main body 45 constituting a part of the transmission case 48 and the rear portion of the gear case 47. One of the support arms 60a is rotatably supported relative to the output shaft 57, and the other support arm 60b is coaxial with the output shaft 57, -11 - 1276568
且可轉動地被支承在：上述曲軸箱主體45的後部所設置的 支軸61。也就是說，搖臂60的前端部，是可上下擺動地被 支承在上述變速機殼體48。 上述輸出軸57的其中一端，是從上述搖臂60所具備的 其中一個支承腕部60a突出，在上述輸出軸57從上述支承 腕部60a突出的突出部是固定著驅動鏈輪62。另一方面， 在沿著機車的行進方向的左側且在後輪WR的車軸5 9是固 φ定著從動鏈輪63，在驅動鏈輪62及從動鏈輪63是繞掛著循 環式的鏈條64。並且在上述支承腕部60a的前端外面側， 是安裝著：用來覆蓋驅動鏈輪62的鏈輪外殼65。 在上述變速機殻體48的後部，是設置有：朝上方延伸 的一對托架66……，該托架66……，是被支承在主管2(L··· …的後端部。而如第5圖所揭示，在變速機殼體4 8的後方 側下部，是同軸地設置有一對的主腳架軸67、67，在該主 腳架軸67……可轉動地軸支承著主腳架68。而在兩主管20 ^ ......的彎曲部20c......之間架設著橫管71，在該橫管71、 與上述搖臂60的前部所設置的避震器用的托架60c之間， 設置有具有朝前後延伸的軸線的後避震器72。 參照第7圖，引擎E的進氣系統73，是具備有··在前排 及後排氣缸BF、BR之間將下流端連接到該氣缸BF、BR的 氣缸頭30F、30R的一側面的油門主體74F、74R、分別連 接於兩油門主體74F、74R的上流端的進氣管75F、75R、 以及共通地連接該進氣管75 F、75R，且配置於前排氣缸 BF的上方的空氣濾清器76B ;在各油門主體74F、74R，是 -12- (10) 1276568 安裝著燃料噴射閥77F、77R。 空氣濾清器76，是在濾清器殼體78內收容有濾清器濾、 心7 9所構成的。濾清器殻體78，是以··將第二殼體構件81 的周緣部挾持在第一及第三殼體構件8〇、8 2的周緣部之間 的方式，來結合著：朝上方開啓的碗狀的第一殼體構件80 、一體地具有用來將濾清器殼體7 8內分隔爲上方的未淨化 室8 3及下方的淨化室8 4的分隔壁8 1 a的第二殼體構件8 1、 φ及朝下方開啓的碗狀的第三殼體構件82所構成；是從上方 側也就是未淨化室83側，將濾清器濾心79可裝卸地安裝到 ，上述分隔壁81a所設置的流通孔85。而上述進氣管75F、 75 R是以伸入於淨化室84的方式連接於濾清器殼體78。 合倂參照第8圖，在構成濾清器殼體78的一部分的第 三殼體構件82的頂壁部82a的右側上部，是設置有朝下方 凹入的凹部82b，將朝右側方開口的外端部配置於上述凹 部8 2b，將從俯視方向觀察彎曲成形爲略L字形的外氣導入 •管86貫穿第三殼體構件82的面對於上述凹部82b的側壁部 ，而被安裝於第三殼體構件82，則外氣導入管86的內端是 連通於未淨化室8 3。 在第二殼體構件81的分隔壁81a，是一體地設置有： 朝上方的未淨化室83側突出，形成有面對於下方的淨化室 84的安裝凹部87的突部88;可插合脫離地***於上述安裝 凹部8 7的共鳴器8 9，是可裝卸地被安裝於分隔壁8丨a。藉 由讓共鳴器89面對於淨化室84而安裝於濾清器殼體78，則 能有效地應用濾清器殼體7 8內的狹窄空間，而有助於減少 -13- (11) 1276568 進氣系統73的進氣聲音。 空氣濾清器76的濾清器殼體78，是形成爲··前後方向 的長度大於上下方向的長度，在該空氣濾清器76的上方跨 越兩下管1 8……而配置的油箱90，是被搭載支承於車體框 架F的前部也就是兩下管18……。 上述濾清器殼體78的頂壁部也就是第三殼體構件82的 頂壁部82a，是形成爲：與油箱90的底壁部90a相對向，且 φ 朝前後略水平地延伸，第二殻體構件8 1的分隔壁8 1 a也是 形成爲朝前後略水平地延伸。 在上述引擎E的前排氣缸BF的前方且在空氣濾清器76 的下方，是配置有：用來將水冷式引擎E所加熱的引擎冷 卻水予以冷卻的散熱器91。在該散熱器91的下部，是設置 有：朝向車體框架F所具備的第二引擎懸架33……側突出 的安裝腕部168……，該安裝腕部168......，是經由安裝橡 膠170……而被支承在第二引擎懸架33……上所設的托架 φ 169……。而在散熱器9 1的上部，是設置有：朝向其上方 的低管1 9......側突出的安裝腕部1 7 1......，在低管1 9...... 所設置的托架1 72……，是經由沒有圖示的安裝橡膠而支 承著上述安裝腕部171……。也就是說，散熱器91，是被 支承在：車體框架F的低管19……及第二引擎懸架33…… 〇 在上述空氣濾清器76的濾清器殼體78的下部的第一殼 體構件80，是一體地設置有：用來將來自於前方的行駛氣 流導引到散熱器9 1側的導流板92，該導流板92，是從濾清 -14- (12) 1276568 器殼體7 8的前端下部朝向散熱器9 1側而朝向斜後下方傾斜 延伸。 引擎E的排氣系統93，是具備有：將上流端連接在前 排氣缸BF的氣缸頭3 OF的下部側面，而於動力單元P的下 方朝後方延伸的排氣管94、將上流端連接於後排氣缸BR 的氣缸頭30R的後部側面的排氣管95、將這些排氣管94、 95的下流端共通地相連的集合排氣管96、以及配置於後輪 φ WR的右側，而連接於集合排氣管96的滅音器97。 前排氣缸BF的排氣管94，是從氣缸頭30F朝下方彎曲 呈略C字型，通過上述動力單元P的下方朝後方延伸，在 動力單元P的後方朝向後輪WR的右側立起，在構成上述動 力單元P的殼體的一部分的變速機殼體48的底壁部48a的外 面部，是設置有：用來收容上述排氣管94的至少上部的收 容凹部98。 上述收容凹部98，如第6圖所示，是配置於：曲軸34 φ的驅動皮帶輪51側的曲軸臂34a、與驅動皮帶輪51之間， 藉此能夠避免與較大直徑的驅動皮帶輪5 1造成干涉，在變 速機殻體48的底壁部48a的外面部，能夠合適地形成收容 凹部9 8。 後排氣缸BR的排氣管95，是在較主腳架軸67更後方 處，以與前排氣缸BF的上述排氣管94並排的方式，彎曲 形成爲從曲軸箱28的左側穿入於變速機殼體48的後部。也 就是說，後排氣缸B R的排氣管9 5，是從氣缸頭3 0 R朝向曲 軸箱28及變速機殼體48的左側延伸，並且穿入於變速機殼 -15- (13) 1276568 體4 8的後部，在較上述主腳架軸6 7的更後方處，形成爲與 前排氣缸BF的上述排氣管94並排。 集合排氣管96，是共通地連接於··在動力單元p的後 方側所並排配置的的兩排氣管9 4、9 5的下流端，在該集合 排氣管96的下流端連接著滅音器97的上流端。 在第9圖，在車體框架F的前端的頭管17，是設置有： 可切換轉向車把1 6的鎖定狀態及解除鎖定狀態的鎖定機構 春 101，該鎖定機構101，是藉由被配置在遠離鎖定機構101 的位置的鑰匙圓筒鎖1 02的操作所切換作動。 鎖定機構1 〇 1，是具備有：藉由在以相連於轉向車把 16及前叉15的方式，而能插合脫離地卡合於轉向軸103的 鎖定銷104，而被配設於頭管17的前面側，上述轉向軸103 是可轉動地嵌合於頭管1 7，在頭管1 7的前面部所固定安裝 的支承框1 05，是能夠保持上述鎖定銷1 04在垂直相交於轉 向軸1 03的軸線的方向的動作。 φ 在中空圓筒狀的上述轉向軸103的側壁部，是設置有 卡合孔.106，當轉向軸103是在預定的轉動位置時是與上述 卡合孔106同軸相連的插通孔107，是設置在頭管17的前面 部。而上述支承框1 05，是具有從前方側朝向上述頭管1 7 的支承板部l〇5a，朝軸方向可自由移動地貫穿該支承板部 10 5 a的鎖定銷104的其中一端，是可朝向上述卡合孔1〇6卡 合地***通於上述插通孔107。 在鎖定銷1 04的另一端，是設置有朝半徑方向外伸出 的鍔部104a，藉由在上述支承框105的支承板部l〇5a及鍔 -16 - (14) 1276568 部104a之間所壓縮設置的彈簧108，則鎖定銷104會被彈壓 朝向使其一端部解除對上述卡合孔1 06的卡合狀態的方向 〇 在上述鎖定銷104的另一端，是抵接著：以銷栓109可 轉動地被支承於支承框1 0 5的凸輪1 1 0，該凸輪1 1 0，當位 於第9圖的實線所示的轉動位置時，上述鎖定銷104的軸方 向位置，是被設定在：其一端部解除對卡合孔106的卡合 φ狀態而位於插通孔1 07內的位置。 在頭管17是固定安裝有朝其斜前上方延伸的支架111 ，在該支架111的上端，是安裝著：配置於轉向車把16的 中央部前方的儀表1 1 2，而用來支承頭燈1 1 3的支承構件 1 1 4是安裝於該支架1 1 1的上部。 ' 鑰匙圓筒鎖102的筒體115，是在上述儀表112的附近 被安裝於支架111，因應於正規的鑰匙Η 6的***轉動操作 而轉動的轉子117，是可轉動地***於上述筒體115內，在 φ該轉子1 1 7的外面部，是突出設置有：在軸方向隔著間隔 的一對銷栓1 1 8、1 1 9。 在鎖定機構101及鑰匙圓筒鎖102之間，是配置有：其 中間部藉由銷栓120而可轉動地被支承於上述支架111的連 桿構件121，該連桿構件121的其中一端部，是被夾在上述 轉子1 1 7所具備的一對銷栓1 1 8、1 1 9之間。而在連桿構件 121的另一端部所設置的長孔部122，是插穿有連結銷123 ，該連結銷1 23，是在其偏心位置植設固定於上述鎖定機 構1 0 1的凸輪1 1 〇。 -17- (15) 1276568 當以鑰匙1 16操作鑰匙圓筒鎖102時，會因應於：藉由 轉子1 1 7的轉動而讓一對銷栓1 1 8、1 1 8朝圓周方向位移的 動作，而讓連桿構件1 2 1，在第9圖的實線所示的位置及虛 線所示的位置之間擺動，在鎖定機構1 0 1，會因應於上述 連桿構件1 2 1的擺動，而讓凸輪1 1 0在第9圖的實線所示的 位置及虛線所示的位置之間轉動，藉此讓鎖定銷1 04，在 解除其與轉向軸103的卡合的位置、及其與轉向軸1〇3卡合 φ的位置之間，朝向軸方向移動。也就是說，在鑰匙圓筒鎖 102的轉子117，是以因應於該轉子117的轉動而擺動的方 式，連結著連桿構件1 2 1的一端部，鎖定撵構1 〇 1，會因應 於連桿構件1 2 1的擺動而作動來切換鎖定狀態及解除鎖定 狀態，而連結於連桿構件1 2 1的另一端部。 接著來看第1圖，油箱90、空氣濾清器76、及動力單 元P、與車體框架F，是以由合成樹脂所構成的車體外殻 125所覆蓋的構造，該車體外殼125,是具備有：將頭管17 φ的前部及前輪WF的上部予以覆蓋，並且安裝著頭燈113的 前外殻126、從後方側覆蓋頭管17及油箱90，而與前外殻 126相連的中央外殻127、接合於上述前外殼126的左右兩 側而覆蓋搭乘者的腳部前方的左右的一對腿部護罩1 2 8… …、用來支承搭乘者的腳部，而與腿部護罩128......相連 的左右的一對置腳部129……（參照第4圖）、在該置腳部 129……之間朝上方***而與中央外殼127的後部相連的地 板管道部130、從上述兩置腳部129……的外緣分別朝下方 下垂的側裙部131……（參照第4圖）、以及覆蓋著車體框架 •18- (16) 1276568 F的後部的左右兩側，而與置腳部1 29……及地板管道部 130接合的後外殼132。 在後外殻132上，是可開閉地設置有：讓操作轉向車 把16的方向的車輛駕駛者乘坐，並且可讓車輛駕駛者後方 的共乘者乘坐的雙人乘坐型的乘車用座墊133。該乘車用 座墊133，是配置在較油箱90更後方處，是藉由以：車體 外殼125之中的從後方側覆蓋油箱90的中央外殼127、與該 φ中央外殻127的後部相連的地板管道部130、以及設置有上 述乘車用座墊133的後外殻132，來將從側面觀察爲略U字 型的跨腳空間135，形成爲配置於煎方側的油箱90及空氣 濾清器76、與後方側的乘車用座墊1 3 3之間，而散熱器9 1 、車體框架F的兩下管18……及兩低管19……，也是配置 在較上述跨腳空間135更前方處。 在空氣濾清器76的濾清器殻體78的第三殼體構件82的 後部，如第7圖所示，用來更換在該濾清器殼體78內所收 φ容的濾清器濾心79的濾心更換窗部136，是設置爲面對於 上述跨腳空間1 3 5側，該濾心更換窗部1 3 6，是以可開閉的 蓋子構件137所封閉。 濾清器殻體78的頂壁部82a，是形成爲：與油箱90的 底壁部90a相對向而朝向前後略水平地延伸，濾清器濾心 79，也可從上述濾心更換窗部136大致水平地抽出，以與 上述頂壁部82a相對向的大致水平的姿勢被配置於濾清器 殻體7 8內。而對應於上述濾心更換窗部1 3 6，在地板管道 部130及中央外殼127，是設置有：可進行蓋子構件137的 -19- (17) 1276568 開閉操作及濾清器濾心79的插卸動作的開口部1 3 8，該開 口部138是以可裝卸的蓋子構件13 9所封閉。 在第10圖及第11圖，在上述乘車用座墊133的下方， 是配置有置物箱140，該置物箱140是能以該乘車用座墊 133的底板141可開閉地封閉其上端開口部，該置物箱140 ，是以上述座墊軌道23……及後管24……所支承。 置物箱140，是被配置於：在車體框架F的橫管71及搖 φ 臂60之間所設置的後避震器72的上方，在置物箱140的底 壁部14 0a，是設置有：以讓上述後避震器72的軸線位在較 上述底壁部140a的外面部更上方的位置的方式，來收容上 •述後避震器72的收容凹部142。並且該收容凹部142，如第 1 1圖所揭示，是配置在置物箱1 40的寬度方向中央部，藉 由該收容凹部142的配置，可讓半罩式（含可掀罩的全罩式 )的安全帽143在其護目面鏡144打開而上揚的狀態，將該 安全帽143收容在置物箱140。 φ 接著針對該實施例的作用來加以說明，是以車體外殻 125形成了從側面觀察爲略U字型的跨腳空間135，該跨腳 空間135，是配置在：車體框架F的前端的頭管17、以及讓 用來操作該頭管17可轉向地所支承的轉向車把16的車輛駕 駛者所乘坐的乘車用座墊133之間；車體框架F，是具備有 :在跨腳空間1 3 5的前方從頭管1 7朝斜後下方延伸的左右 的一對下管18.......配置於該下管18……的下方並且從頭 管1 7朝向斜後下方延伸的左右的一對低管1 9.......以及從 該低管1 9......的下端朝後方延伸，並且將兩下管1 8......的 -20- (18) 1276568 下端連設於中間部的左右的一對主管20……；主管20，是 將：從低管19的下端朝向斜後上方延伸，並且將下管18的 下端連設於中間部的前半傾斜部20a、朝斜後下方延伸的 後半傾斜部20b、以及朝上方膨脹般地彎曲而將前半傾斜 部20a的後端及後半傾斜部20b的前端間予以連結的彎曲部 20c，一體地相連所構成的。 藉由這種車體框架F的構造，主管20，是形成爲：從 φ低管19的下端朝向斜後上方延伸，並且在上方彎曲之後， 再朝斜後下方延伸的形狀，所以可較增加主管20的下方空 間，而能夠增加引擎E的形狀的自由度，並且適當地作出 主管20的中間的彎曲部20c，而能達到最適當的操作性。 在下管18……的下端附近且在主管20……的前半傾斜 部20a……，是設置有：用來支承引擎E的第一引擎懸架32 ……，所以是以利用與下管1 8……連結而剛性較強的部分 ，來將引擎E支承於主管20……，而能夠將引擎E有效率 φ且確實地支承於車體框架F。 而V形引擎E，在其前排及後排氣缸BF、BR之間被支 承於第一引擎懸架32……，而被搭載於車體框架F，後排 氣缸BR是被配置於兩主管20……的彎曲部20c之間，所以 是在主管20……之中的剛性較高的部分，來支承著V形引 擎E的前排及後排氣缸BF、BR之間，而能將V形引擎E有 效率地搭載於車體框架F。 用來支承乘車用座墊1 3 3而朝斜後上方傾斜的左右的 一對座墊軌道23……的前端，是藉由分別接合在兩主管20 -21 - (19) 1276568 ......的後半傾斜部20b……的前部，則能讓主管20……及 座墊軌道23……所構成的角度合適化，而能夠提高座墊軌 道23......接合到主管20……的剛性，並且能夠使平衡性更 佳。 並且，主管20……，是由方筒所構成，該方筒的橫剖 面形狀是上下方向較左右方向更長的直角四邊形，所以主 管20......的上下方向的剛性較高，而在左右方向具有柔韌 φ 性，而能獲得更好的操縱性。 在後部用來軸支承後輪WR的搖臂60的前部，是以車 體框架F可上下擺動地被支承著，在設置於車體框架F及搖 臂6 0之間的後避震器72的上方，且在車輛駕駛者所乘坐的 乘車用座墊1 3 3的下方，是配置有置物箱1 40，而在置物箱 140的底壁部140a的下面部，是設置有收容凹部142，該收 容凹部142，是以讓後避震器72的中心軸線位在較上述底 壁部140a的下面部更上方的位置的方式，收容著上述後避 φ震器72，所以能避免其與後避震器72的干涉，且能夠將置 物箱140的底壁部140a設定在更低的位置，所以置物箱140 能確保有更大的容量。 與搭載於車體框架F的引擎E相連而構成進氣系統73的 一部分的空氣濾清器76，是配置於油箱90的下方，在空氣 濾清器76的濾清器殼體78 ’是以面對於跨腳空間135側的 方式，設置有：用來更換在該濾清器殼體78內所收容的濾 清器濾心7 9的濾心更換窗部1 3 6 ’所以當要更換空氣濾清 器76的濾清器濾心79時’即使例如停車在側邊空間很小的 -22- (20) 1276568 場合，在開啓了濾心更換窗部1 36的狀態，仍能從跨腳空 間135側容易地更換濾清器濾心79。而在濾清器殻體78的 側邊則不需要確保可用來拆卸濾清器濾心79的開口空間， 例如如該實施例，可在濾清器'殻體78的側邊配置車體框架 F的補強用連結板2 1，而能夠增加車體框架F佈置上的自由 度，並且能增加車體側面的外觀設計的自由度。 濾清器殼體78的頂壁部82a，是形成爲與油箱90的底 φ 壁部90a相對向且朝前後大致水平地延伸，則濾清器濾心 79，是以能夠從濾心更換窗部136大致水平地抽出的方式 ，以與頂壁部82a相對向的大致水平的姿勢，被配置於濾 清器殼體78內，而能有效率地配置油箱90及空氣濾清器76 且能確保有充分的容量，並且能維持容易更換的特性，且 能將濾心更換窗部1 36的開口面積作得較小。 空氣濾清器76的濾清器殼體78，是形成爲其前後方向 的長度大於其上下方向的長度，所以可以充分地確保空氣 φ濾清器76的容量，而能有效率地配置濾清器濾心79，並且 可有效率地配置周邊的組成構件。 在引擎E的前方配置著散熱器91，在該散熱器91的上 方配置著空氣濾清器76，而朝向散熱器9 1側延伸的導流板 92，是用來導引來自於前方的行駛氣流，且一體地連設於 空氣濾清器76的濾清器殼體78，所以可減少零件數量，能 有效地將行駛氣流導引到散熱器9 1側，而能夠將散熱器9 1 冷卻。 而跨腳空間135，是配置在：較油箱90、空氣濾清器 -23- (21) 1276568 76、及散熱器91的更後方處，所以在速克達型機車，能確 保油箱90及空氣濾清器76的容量，在散熱器91的後方不會 配置有較大的構件，而能讓導流板92的導流效果更好。 可將轉向車把1 6的鎖定狀態及解除鎖定狀態予以切換 的鎖定機構1 01、以及使切換操作力作用於該鎖定機構1 0 1 的鑰匙圓筒鎖102，是相互遠離配置，在鑰匙圓筒鎖1〇2的 轉子1 17是連結著：會因應於該轉子1 17的轉動而擺動的連 φ 桿構件121的其中一端部，上述鎖定機構101，是以：會因 應於上述連桿構件121的擺動而作動切換爲鎖定狀態及解 .除鎖定狀態的方式，被連結於連桿構件1 2 1的另一端部。 來自於鑰匙圓筒鎖102的操作力，會藉由連桿構件121 的擺動，而被傳達到鎖定機構101側，而能減少零件數量 ，簡單地構成鑰匙圓筒鎖102及鎖定機構101之間的操作力 傳達機構，並且可讓鑰匙圓筒鎖102的操作具有規則感， 而能提高其商品性。 φ 鑰匙圓筒鎖102，是配置在轉向車把16的前方且在儀 表1 I 2附近，所以車輛駕駛者能夠容易的操作鑰匙圓筒鎖 102。 在車體框架F所搭載的V形引擎E的前排氣缸BF，是具 有：其氣缸軸線前傾的氣缸體29F及氣缸頭30F，在該引擎 E的曲軸箱2 8的右側，是結合著變速機殼體4 8，該變速機 殻體48，是用來收容：與引擎E—起構成動力單元P的無段 變速機Μ，而上流端連接於軸線前傾的氣缸頭30F的排氣 管94，是通過動力單元Ρ的下方而朝後方延伸’而在變速 -24- (22) 1276568 機殼體48的底壁部48a的下面部，是設置有：收容著排氣 管94的至少上部的收容凹部98。 於是可將排氣管94以更接近動力單元P的方式，配置 於其上方，藉此可確保最低的離地高度，而能將引擎E配 置在更低的位置，而能將速克達型機車的重心降低。 在引擎E的後排氣缸BR所具備的氣缸頭30R的後部側 面所相連的排氣管95，是在可轉動地軸支承主腳架68且配 φ 置於對應於動力單元P的後部的位置的主腳架軸67的更後 方處，與前排氣缸BF的氣缸頭30F相連，而與通過上述動 力單元P的下方的排氣管94並排，是彎曲形成爲從曲軸箱 28的左側穿入於變速機殼體48的後部。藉此，能夠將位於 後排氣缸BR的後方的排氣管95的配置空間作得較小，而 能將後排氣缸BR後方的空間有效利用爲其他用途。而能 將排氣管95通到較引擎E的最低部更上方處，容易確保最 低離地高度，而能將速克達型機車的重心作得更低。 φ 以上說明著本發明的實施例，本發明並不限定於上述 實施例，只要不脫離本發明的申請專利範圍，則可進行種 種的設計變更。 【圖式簡單說明】 第1圖是第一實施例的速克達型機車的側面圖。 第2圖是將速克達型機車的前部放大顯示的縱剖側面 圖。 第3圖是省略了進氣系統的狀態的動力單元的俯視圖 -25- (23) 1276568 第4圖是從第3圖的箭頭4方向觀察的圖面。 第5圖是從第3圖的箭頭5方向觀察的圖面。 第6圖是第1.圖的6-6線放大剖面圖。 第7圖是空氣濾清器附近的放大縱剖面圖。 第8圖是在省略了油箱的狀態的沿著第7圖的8-8線的 剖面陶。 第9圖是頭管附近的局部缺口側面圖。 第1 〇圖是將速克達型機車的後部放大顯示的縱剖側面 築1 1圖是第1 0圖的1 1 -1 1線剖面圖。 【主襄元件符號說明】 15 :前叉 17 :頭管 73 :進氣系統 76 :空氣濾清器 78 :濾清器殼體 79 :濾清器濾心 82a :濾清器殼體的頂壁部 90 :油箱 90a :油箱的底壁部 1 3 3 :乘車用座墊 1 3 5 :跨腳空間 -26- (24) (24)1276568Further, it is rotatably supported by a support shaft 61 provided at a rear portion of the crankcase main body 45. That is, the front end portion of the rocker arm 60 is supported by the transmission case 48 so as to be swingable up and down. One end of the output shaft 57 protrudes from one of the support arm portions 60a provided in the rocker arm 60, and the drive sprocket 62 is fixed to the projecting portion of the output shaft 57 projecting from the support arm portion 60a. On the other hand, in the left side of the traveling direction of the locomotive and on the axle 59 of the rear wheel WR, the driven sprocket 63 is fixed, and the drive sprocket 62 and the driven sprocket 63 are wound around the circulating type. Chain 64. Further, on the outer surface side of the front end of the support arm portion 60a, a sprocket housing 65 for covering the drive sprocket 62 is attached. In the rear portion of the above-described transmission case 48, a pair of brackets 66 extending upward are provided, and the brackets 66 are supported by the rear end portions of the main pipe 2 (L···. Further, as disclosed in Fig. 5, a pair of main leg shafts 67, 67 are coaxially provided at a lower portion of the rear side of the transmission case 48, and the main leg shafts 67 are rotatably supported by the main shafts 67. a tripod 68. A cross tube 71 is disposed between the curved portions 20c of the two main tubes 20, ..., and is disposed at the front portion of the cross tube 71 and the rocker arm 60 A rear shock absorber 72 having an axis extending forward and backward is provided between the brackets 60c for the shock absorbers. Referring to Fig. 7, the intake system 73 of the engine E is provided with front and rear rows. The throttle bodies BF, BR connect the lower end to the throttle bodies 74F, 74R on one side of the cylinder heads 30F, 30R of the cylinders BF, BR, and the intake pipes 75F, 75R respectively connected to the upstream ends of the two throttle bodies 74F, 74R. And the air cleaner 76B that is connected to the intake pipe 75 F, 75R in common and disposed above the front exhaust cylinder BF; in each of the throttle bodies 74F, 74R, is -12- (10) 1276568 Fuel injection valves 77F and 77R are attached. The air cleaner 76 is configured by accommodating a filter filter and a core 79 in the filter case 78. The filter case 78 is The peripheral portion of the second case member 81 is sandwiched between the peripheral portions of the first and third case members 8A, 8 2 to join the bowl-shaped first case member 80 that is opened upward, Integrally provided with a second housing member 8 1 , φ for separating the inside of the filter housing 7 8 into the upper clean chamber 8 3 and the lower cleaning chamber 8 1 a, and opening downward The bowl-shaped third case member 82 is formed; the filter element 79 is detachably attached to the flow hole 85 provided in the partition wall 81a from the upper side, that is, the side of the clean room 83. The intake pipes 75F and 75 R are connected to the filter case 78 so as to protrude into the clean room 84. Referring to Fig. 8, the third case member constituting a part of the filter case 78 is incorporated. The upper right portion of the top wall portion 82a of the 82 is provided with a concave portion 82b that is recessed downward, and the outer end portion that is open to the right side is disposed in the concave portion 8 2b. The outer air introduction tube 86 that is bent and formed into a substantially L shape in a plan view is inserted into the third housing member 82 on the side wall portion of the recessed portion 82b through the surface of the third housing member 82, and the outside air is introduced. The inner end of the pipe 86 is connected to the uncleaning chamber 83. The partition wall 81a of the second casing member 81 is integrally provided with: an upwardly facing clean room 83 side, and a surface cleansing chamber is formed. A projection 88 of the mounting recess 87 of the 84; a resonator 88 which is insertably and detachably inserted into the mounting recess 87 is detachably attached to the partition wall 8a. By mounting the resonator 89 to the filter housing 78 with respect to the clean room 84, the narrow space in the filter housing 78 can be effectively applied, which helps to reduce -13-(11) 1276568 The intake sound of the intake system 73. The filter case 78 of the air cleaner 76 is formed such that the length in the front-rear direction is longer than the vertical direction, and the oil tank 90 disposed across the lower tubes 1 8 ... above the air cleaner 76 It is mounted on the front part of the body frame F, that is, the two lower tubes 18... The top wall portion of the filter housing 78, that is, the top wall portion 82a of the third housing member 82, is formed to face the bottom wall portion 90a of the oil tank 90, and φ extends slightly horizontally forward and backward. The partition wall 8 1 a of the second casing member 8 1 is also formed to extend slightly horizontally forward and backward. In front of the front exhaust cylinder BF of the engine E and below the air cleaner 76, a radiator 91 for cooling the engine cooling water heated by the water-cooled engine E is disposed. In the lower portion of the radiator 91, a mounting arm portion 168 ... that protrudes toward the second engine suspension 33 included in the vehicle body frame F is provided, and the mounting arm portion 168 ... is The bracket φ 169 ... provided on the second engine suspension 33 ... is supported by the mounting rubber 170 . On the upper part of the radiator 9, there is provided a mounting arm 1 7 1 ... which protrudes toward the upper side of the lower tube 1 9 ..., in the low tube 1 9. The brackets 1 72 ... which are provided are supported by the mounting arm 171 ... via a mounting rubber (not shown). That is, the radiator 91 is supported by the low pipe 19 of the vehicle body frame F... and the second engine suspension 33... 〇 at the lower portion of the filter casing 78 of the air cleaner 76 A housing member 80 is integrally provided with a deflector 92 for guiding the traveling airflow from the front to the side of the radiator 91, and the deflector 92 is from the filter-14- (12 1276568 The lower end of the front end of the housing 7 8 extends obliquely toward the rear side and toward the lower side toward the side of the heat sink 9 1 . The exhaust system 93 of the engine E is provided with an exhaust pipe 94 that connects the upstream end to the lower side surface of the cylinder head 3 OF of the front bank BF, and extends rearward of the power unit P, and connects the upstream end. An exhaust pipe 95 on the rear side surface of the cylinder head 30R of the rear exhaust cylinder BR, a collecting exhaust pipe 96 that commonly connects the downstream ends of the exhaust pipes 94 and 95, and a right exhaust pipe 96 disposed on the right side of the rear wheel φ WR A silencer 97 is connected to the collection exhaust pipe 96. The exhaust pipe 94 of the front bank BF is bent downward from the cylinder head 30F to have a slightly C-shape, and extends rearward from the lower side of the power unit P, and rises toward the right side of the rear wheel WR behind the power unit P. The outer surface portion of the bottom wall portion 48a of the transmission case 48 constituting a part of the casing of the power unit P is provided with a housing recess 98 for accommodating at least an upper portion of the exhaust pipe 94. As shown in Fig. 6, the accommodation recessed portion 98 is disposed between the crank arm 34a on the drive pulley 51 side of the crankshaft 34φ and the drive pulley 51, thereby avoiding the drive pulley 51 with a larger diameter. The interference concave portion 9 can be appropriately formed in the outer surface portion of the bottom wall portion 48a of the transmission case 48. The exhaust pipe 95 of the rear exhaust cylinder BR is formed to be inserted from the left side of the crankcase 28 so as to be parallel to the exhaust pipe 94 of the front exhaust cylinder BF at a position further rearward than the main leg shaft 67. The rear of the shifter housing 48. That is, the exhaust pipe 96 of the rear exhaust cylinder BR extends from the cylinder head 30R toward the left side of the crankcase 28 and the transmission case 48, and penetrates the transmission case -15-(13) 1276568 The rear portion of the body 48 is formed to be juxtaposed with the exhaust pipe 94 of the front bank BF at a position further rearward than the main leg shaft 67. The collection exhaust pipe 96 is connected in common to the downstream ends of the two exhaust pipes 194 and 915 arranged side by side on the rear side of the power unit p, and is connected to the downstream end of the collection exhaust pipe 96. The upstream end of the silencer 97. In the ninth diagram, the head pipe 17 at the front end of the vehicle body frame F is provided with a locking mechanism spring 101 that can switch the locked state of the steering handlebar 16 and the unlocked state, and the locking mechanism 101 is The operation of the key cylinder lock 102 disposed at a position away from the lock mechanism 101 is switched. The lock mechanism 1 〇1 is provided with a lock pin 104 that is detachably engaged with the steering shaft 103 so as to be coupled to the steering handlebar 16 and the front fork 15, and is disposed on the head. The front side of the tube 17, the steering shaft 103 is rotatably fitted to the head tube 17, and the support frame 105 fixedly mounted on the front surface of the head tube 17 is capable of maintaining the above-mentioned locking pin 104 in vertical intersection. The action in the direction of the axis of the steering shaft 103. Φ is provided with an engaging hole 106 in the side wall portion of the hollow cylindrical shape of the steering shaft 103, and is an insertion hole 107 coaxially connected to the engaging hole 106 when the steering shaft 103 is at a predetermined rotational position. It is disposed at the front of the head pipe 17. Further, the support frame 050 has one end portion of the lock pin 104 that penetrates the support plate portion 105a from the front side toward the head pipe 17 and is movably inserted in the axial direction. The insertion hole 107 can be inserted into the engagement hole 1〇6 so as to be engaged. At the other end of the lock pin 104, a flange portion 104a projecting outward in the radial direction is provided, between the support plate portion 10a and the 锷-16 - (14) 1276568 portion 104a of the support frame 105. When the spring 108 is compressed, the locking pin 104 is biased toward the direction in which the one end portion is disengaged from the engaging hole 106, and the other end of the locking pin 104 is abutted: 109 is rotatably supported by the cam 1 1 0 of the support frame 105, and the cam 1 1 0, when in the rotational position shown by the solid line in FIG. 9, the axial position of the lock pin 104 is It is set such that one end portion thereof is released from the engagement φ state of the engagement hole 106 and is located at the position inside the insertion hole 107. The head pipe 17 is fixedly attached with a bracket 111 extending obliquely upward and upward, and at the upper end of the bracket 111 is attached: a meter 1 1 2 disposed in front of the center portion of the steering handlebar 16 for supporting the head The support member 1 1 4 of the lamp 1 13 is attached to the upper portion of the bracket 1 1 1 . The cylinder 115 of the key cylinder lock 102 is attached to the bracket 111 in the vicinity of the meter 112, and the rotor 117 that rotates in response to the insertion rotation operation of the regular key cylinder 6 is rotatably inserted into the cylinder. In the outer portion of the rotor 117, the pair of pins 1 1 8 and 1 19 are spaced apart from each other in the axial direction. Between the lock mechanism 101 and the key cylinder lock 102, a link member 121 in which the intermediate portion is rotatably supported by the bracket 111 by a pin 120 is disposed, and one end portion of the link member 121 It is sandwiched between a pair of pins 1 1 8 and 1 1 9 provided in the rotor 1 17 described above. The long hole portion 122 provided at the other end portion of the link member 121 is inserted through a coupling pin 123 which is a cam 1 which is fixed to the lock mechanism 1 0 1 at an eccentric position thereof. 1 〇. -17- (15) 1276568 When the key cylinder lock 102 is operated with the key 1 16 , it will be caused by the rotation of the rotor 1 17 to displace the pair of pins 1 18 and 1 18 in the circumferential direction. Actuating, the link member 1 2 1 is swung between the position indicated by the solid line in FIG. 9 and the position indicated by the broken line, and the locking mechanism 1 0 1 is adapted to the above-mentioned link member 1 2 1 Swinging, the cam 110 is rotated between a position indicated by a solid line in FIG. 9 and a position indicated by a broken line, thereby causing the locking pin 104 to be disengaged from the steering shaft 103, It moves in the axial direction between the position where it is engaged with the steering shaft 1〇3. In other words, the rotor 117 of the key cylinder lock 102 is coupled to the one end portion of the link member 1 2 1 so as to swing in response to the rotation of the rotor 117, and the locking mechanism 1 〇 1 is adapted to The link member 112 is oscillated to switch between the locked state and the unlocked state, and is coupled to the other end of the link member 112. Next, referring to Fig. 1, the oil tank 90, the air cleaner 76, the power unit P, and the vehicle body frame F are covered by a vehicle body casing 125 made of synthetic resin, and the vehicle body casing 125 is covered. The front portion of the head pipe 17 φ and the upper portion of the front wheel WF are covered, and the front outer casing 126 of the headlight 113 is attached, and the head pipe 17 and the oil tank 90 are covered from the rear side, and the front casing 126 is attached. The connected central casing 127 is coupled to the right and left sides of the front casing 126 to cover the left and right pair of leg shields 1 2 8 in front of the passenger's foot, and is used to support the rider's foot. The left and right pair of leg portions 129 (refer to FIG. 4) connected to the leg shields 128 are raised upward between the leg portions 129 and the center housing 127 The floor duct portion 130 connected to the rear portion, the side skirt portion 131 that hangs downward from the outer edges of the two leg portions 129, ... (see Fig. 4), and the body frame 18-(16) The left and right sides of the rear portion of 1276568 F, and the rear outer casing 132 joined to the leg portion 1 29 and the floor duct portion 130. The rear outer casing 132 is provided with an openable and detachable seat cushion for a two-seat passenger seat that allows the vehicle driver to operate in the direction of the handlebar 16 and allows the rider behind the vehicle to ride. 133. The passenger seat cushion 133 is disposed further rearward than the oil tank 90 by: a central casing 127 covering the oil tank 90 from the rear side of the vehicle body casing 125, and a rear portion of the φ center casing 127 The connected floor duct portion 130 and the rear outer casing 132 provided with the above-described passenger seat cushion 133 are formed as a slightly U-shaped cross-foot space 135 as viewed from the side, and are formed as a fuel tank 90 disposed on the frying side and The air cleaner 76 is disposed between the air cushion 76 and the rear seat cushion 1 3 3 , and the radiator 9 1 , the two lower tubes 18 of the vehicle body frame F, and the two lower tubes 19 are also disposed. The above-mentioned footrest space 135 is further forward. At the rear of the third housing member 82 of the filter housing 78 of the air cleaner 76, as shown in Fig. 7, the filter for replacing the volume contained in the filter housing 78 is replaced. The filter center replacement window portion 136 of the filter core 79 is provided so as to face the side of the footrest space 135, and the filter center replacement window portion 136 is closed by the openable and closable cover member 137. The top wall portion 82a of the filter housing 78 is formed to extend horizontally toward the front and rear with respect to the bottom wall portion 90a of the oil tank 90, and the filter cartridge 79 may be replaced from the filter core. The 136 is drawn substantially horizontally, and is disposed in the filter case 78 in a substantially horizontal posture facing the top wall portion 82a. Corresponding to the filter center replacement window portion 136, the floor duct portion 130 and the center housing 127 are provided with a -19-(17) 1276568 opening and closing operation of the cover member 137 and a filter filter core 79. The opening portion 138 of the insertion and removal operation is closed by a detachable cover member 13 9 . In the figure 10 and the figure 11, a storage box 140 is disposed below the passenger seat cushion 133, and the storage box 140 can open and close the upper end of the board 141 of the boarding seat 133. The opening portion, the storage box 140 is supported by the seat rails 23 and the rear tubes 24, . The storage box 140 is disposed above the rear shock absorber 72 provided between the horizontal pipe 71 and the rocker arm 60 of the vehicle body frame F, and is provided in the bottom wall portion 140a of the storage box 140. The accommodation recessed portion 142 of the rear shock absorber 72 is accommodated so that the axis of the rear shock absorber 72 is positioned above the outer surface of the bottom wall portion 140a. Further, as shown in FIG. 1, the housing recessed portion 142 is disposed at the center portion in the width direction of the storage box 1400. By the arrangement of the housing recess portion 142, the half-cover type (full cover type including the hood can be used) The helmet 143 is in a state in which the goggles 144 is opened and raised, and the helmet 143 is housed in the storage box 140. φ. Next, the action of the embodiment will be described. The vehicle body casing 125 is formed with a slightly U-shaped cross-foot space 135 as viewed from the side, and the footrest space 135 is disposed in the vehicle body frame F. The head pipe 17 at the front end and the passenger seat cushion 133 for the vehicle driver who is used to operate the steering handlebar 16 steerably supported by the head pipe 17; the body frame F is provided with: A pair of left and right lower tubes 18 extending from the head pipe 17 toward the lower rear side of the footrest space 1 3 5 are disposed below the lower tube 18 and are inclined from the head tube 17 a pair of left and right lower tubes 1 . . . extending from the lower rear and extending rearward from the lower end of the lower tubes 1 9 ..., and the two lower tubes 1 8..... -20- (18) 1276568 A pair of left and right main tubes 20 connected at the lower end of the intermediate portion; the main tube 20 is to extend from the lower end of the lower tube 19 toward the obliquely rear upper side, and the lower end of the lower tube 18 The front half inclined portion 20a connected to the intermediate portion, the rear half inclined portion 20b extending obliquely rearward and downward, and the upper and lower half inclined of the front half inclined portion 20a are bent like the upward expansion Between the bent portion 20b of the distal end portion to be coupled to 20c, connected integrally constituted. With the configuration of the body frame F, the main pipe 20 is formed to extend from the lower end of the φ low pipe 19 toward the obliquely rear upper portion, and after being bent upward, and then extending obliquely rearward and downward, so that it can be increased. The space below the main pipe 20 can increase the degree of freedom of the shape of the engine E, and appropriately make the intermediate bent portion 20c of the main pipe 20, and the most appropriate operability can be attained. In the vicinity of the lower end of the lower tube 18, and in the front half inclined portion 20a of the main pipe 20, ... is provided with: the first engine suspension 32 for supporting the engine E, so the utilization and the lower tube 1 8 are used... The portion that is connected and has a strong rigidity supports the engine E to the main pipe 20, and the engine E can be φ and reliably supported by the vehicle body frame F. The V-shaped engine E is supported by the first engine suspension 32... between the front and rear exhaust cylinders BF and BR, and is mounted on the vehicle body frame F, and the rear exhaust cylinder BR is disposed in the two main pipes 20 Between the curved portions 20c, the rigid portion of the main pipe 20... supports the front and rear cylinders BF and BR of the V-shaped engine E, and can be V-shaped. The engine E is efficiently mounted on the vehicle body frame F. The front ends of the pair of left and right seat cushion rails 23, which are used to support the seat cushions 1 3 3 and are inclined obliquely upward and upward, are respectively joined by the two main bodies 20 - 21 - (19) 1276568 ... The front portion of the rear half inclined portion 20b... can be adapted to the angle formed by the main pipe 20 and the seat cushion rails ..., and the seat cushion rail 23 can be improved to be joined to The rigidity of the main pipe 20... can make the balance better. Further, the main pipe 20 is formed by a rectangular tube having a cross-sectional shape that is a rectangular parallelepiped that is longer in the vertical direction than the horizontal direction. Therefore, the rigidity of the main pipe 20 is high in the vertical direction. In the left and right direction, it is flexible and can achieve better maneuverability. The front portion of the rocker arm 60 for supporting the rear wheel WR at the rear portion is supported by the vehicle body frame F so as to be vertically oscillating, and is disposed between the vehicle body frame F and the rocker arm 60. Above the 72, a storage box 340 is disposed below the passenger seat cushion 133 that the driver of the vehicle rides, and a housing recess is provided in the lower portion of the bottom wall portion 140a of the storage box 140. 142. The accommodating recess 142 accommodates the rear damper 72 so that the central axis of the rear shock absorber 72 is located above the lower surface of the bottom wall portion 140a. Interference with the rear shock absorber 72 and the bottom wall portion 140a of the storage box 140 can be set at a lower position, so that the storage box 140 can ensure a larger capacity. The air cleaner 76 that is connected to the engine E mounted on the vehicle body frame F to constitute a part of the intake system 73 is disposed below the oil tank 90, and the filter housing 78' of the air cleaner 76 is In the manner of the side of the footrest space 135, there is provided a filter center replacement window portion 1 3 6 ' for replacing the filter cartridge 7 contained in the filter housing 78. Therefore, when the air is to be replaced When the filter element of the filter 76 is 79, 'even if, for example, the parking space is small in the side space -22-(20) 1276568, the state of the filter replacement window portion 1 36 can be opened from the foot. The filter cartridge 79 is easily replaced on the space 135 side. On the side of the filter housing 78, there is no need to ensure an open space that can be used to remove the filter cartridge 79. For example, as in this embodiment, the body frame can be placed on the side of the filter 'housing 78. The reinforcing connecting plate 21 of F can increase the degree of freedom in the arrangement of the body frame F, and can increase the degree of freedom in designing the side of the vehicle body. The top wall portion 82a of the filter housing 78 is formed to face the bottom φ wall portion 90a of the oil tank 90 and extends substantially horizontally forward and backward, and the filter cartridge 79 is capable of replacing the window from the filter core. The portion 136 is substantially horizontally drawn, and is disposed in the filter case 78 in a substantially horizontal posture facing the top wall portion 82a, so that the oil tank 90 and the air cleaner 76 can be efficiently disposed and can be disposed. It is ensured that there is sufficient capacity, and the characteristics of easy replacement are maintained, and the opening area of the filter replacement window portion 136 can be made small. The filter case 78 of the air cleaner 76 is formed such that the length in the front-rear direction is longer than the vertical direction. Therefore, the capacity of the air φ filter 76 can be sufficiently ensured, and the filter can be efficiently disposed. The filter core 79 is provided, and the peripheral constituent members can be efficiently arranged. A radiator 91 is disposed in front of the engine E, and an air cleaner 76 is disposed above the radiator 91, and a deflector 92 extending toward the radiator 91 is used to guide the vehicle from the front. The air flow is integrally connected to the filter housing 78 of the air cleaner 76, so that the number of parts can be reduced, and the traveling airflow can be efficiently guided to the radiator 91 side, and the radiator 9 1 can be cooled. . The cross-foot space 135 is disposed at a position further than the oil tank 90, the air filter -23-(21) 1276568 76, and the radiator 91, so that the tank 90 and the air can be ensured in the skating type locomotive. The capacity of the filter 76 is such that a large member is not disposed behind the radiator 91, and the flow guiding effect of the deflector 92 can be made better. The lock mechanism 101 that can switch the locked state and the unlocked state of the steering handlebar 16 and the key cylinder lock 102 that causes the switching operation force to act on the lock mechanism 1 0 1 are disposed away from each other in the key circle. The rotor 1 17 of the cylinder lock 1〇2 is connected to one end portion of the φ rod member 121 which is oscillated in response to the rotation of the rotor 1 17, and the locking mechanism 101 is adapted to the above-mentioned link member. The swinging operation of 121 is switched to the locked state and the solution is locked to the other end portion of the link member 1 21. The operating force from the key cylinder lock 102 is transmitted to the side of the lock mechanism 101 by the swing of the link member 121, and the number of parts can be reduced, and the key cylinder lock 102 and the lock mechanism 101 are simply formed. The operation force transmission mechanism can make the operation of the key cylinder lock 102 have a regular feeling, and can improve its commerciality. Since the φ key cylinder lock 102 is disposed in front of the steering handlebar 16 and in the vicinity of the instrument 1 I 2 , the vehicle driver can easily operate the key cylinder lock 102. The front bank BF of the V-shaped engine E mounted on the vehicle body frame F has a cylinder block 29F and a cylinder head 30F whose cylinder axis is inclined forward, and is coupled to the right side of the crankcase 28 of the engine E. The transmission case 48 8 is for accommodating a stepless transmission Μ which constitutes the power unit P together with the engine E, and the exhaust end is connected to the exhaust of the cylinder head 30F which is inclined forward by the axis. The tube 94 extends rearward through the lower portion of the power unit ', and is provided at least in the lower surface portion of the bottom wall portion 48a of the shifting gear-24- (22) 1276568 casing 48, and is provided with at least the exhaust pipe 94. The upper receiving recess 98. Thus, the exhaust pipe 94 can be disposed above the power unit P, thereby ensuring the lowest ground clearance, and the engine E can be placed at a lower position, and the speed can be set. The center of gravity of the locomotive is reduced. The exhaust pipe 95 connected to the rear side surface of the cylinder head 30R provided in the rear exhaust cylinder BR of the engine E is rotatably pivotally supported by the main leg 68 and is disposed at a position corresponding to the rear portion of the power unit P. Further to the rear of the main leg shaft 67, it is connected to the cylinder head 30F of the front bank BF, and is arranged side by side with the exhaust pipe 94 passing through the lower portion of the power unit P, and is bent so as to penetrate from the left side of the crankcase 28. The rear of the shifter housing 48. Thereby, the arrangement space of the exhaust pipe 95 located behind the rear exhaust cylinder BR can be made small, and the space behind the rear exhaust cylinder BR can be effectively utilized for other purposes. The exhaust pipe 95 can be passed above the lowest part of the engine E, and it is easy to ensure the lowest ground clearance, and the center of gravity of the Scooter type locomotive can be made lower. The embodiment of the present invention has been described above, and the present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of a scooter type locomotive of the first embodiment. Fig. 2 is a longitudinal sectional side view showing the front portion of the Scooter type locomotive in an enlarged manner. Fig. 3 is a plan view of the power unit in which the state of the intake system is omitted. -25- (23) 1276568 Fig. 4 is a view as seen from the direction of arrow 4 in Fig. 3. Fig. 5 is a plan view seen from the direction of arrow 5 in Fig. 3. Fig. 6 is an enlarged cross-sectional view taken along line 6-6 of Fig. 1. Figure 7 is an enlarged longitudinal sectional view of the vicinity of the air cleaner. Fig. 8 is a cross-sectional view taken along line 8-8 of Fig. 7 in a state in which the fuel tank is omitted. Figure 9 is a side view of a partial notch near the head tube. The first drawing is a vertical sectional side view showing the rear part of the Scooter type locomotive. Fig. 1 is a cross-sectional view taken along the line 1 1 -1 1 of Fig. 10. [Main Unit Symbol Description] 15: Front fork 17: Head tube 73: Intake system 76: Air filter 78: Filter housing 79: Filter element 82a: Top wall of the filter housing Part 90: Fuel tank 90a: bottom wall portion of fuel tank 1 3 3 : seat cushion for passenger car 1 3 5 : space for footrest -26- (24) (24) 1276568
1 3 6 :濾心更換窗部 E :引擎 F :車體框架 WF :前輪 -27-1 3 6 : Filter replacement window E : Engine F : Body frame WF : Front wheel -27-