583108 玖、發晚說明 ..........,ϋ ..... - · - ' ' =- ..... , .·.. . ... _ 【發明所屬之技術領域】 本發明有關於二輪機車，在後輪之左右之一側配置動力 單元由用以將後輪連結到輸出軸之變速機構成，水平之樞 軸之兩端部連結到車體框架，該水平之樞軸用來支持形成 在該動力單元之殻體之吊架臂使其成爲可轉動之方式，本 發明特別有關於將引擎之排氣消音器設在動力單元之構 造。 【先前技術】 φ 上述方式之二輪機車習知者有如被揭示在日本國特開平 1 1-2 125號公報者。在習知之此種二輪機車中，引擎之排 氣消音器，與動力單元一起被設在後輪之左右一側，安裝 在動力單元之適當位置。 【發明內容】 (發明所欲解決之問題） 在習知之二輪機車之排氣消音器之配設構造中，利用動 力單元和排氣消音器之鄰接配置，可以進行將排氣消音器 · 強固支持在動力單元，其反面是包含排氣消音器之動力單 元之重量變成集中在後輪之左右之一側，另外連接在引擎 和排氣消音器間之排氣管之長度，不容易設定成具有充分 之長度。 本發明針對上述之問題，其目的是提供二輪機車之排氣 消音器之配設構造，可以將動力單元和排氣消音器之重量 分散到後輪之左右兩側，同時可以強固地進行將排氣消音 6 312/發明說明書(補伯)/92-06/92107260 583108 器支持到動力單元，同時可以將排氣管之長度設定成爲具 有充分之長度。 (解決問題之手段） 用來達成上述目的之本發明之第1特徵是一種二輪機車 之排氣消音器之配設構造，係在由引擎和用來使後輪連結 到輸出軸之變速機構成動力單元，將動力單元配置在後輪 之左右之一側，水平樞軸用來支持形成在該動力單元之殼 體之吊架臂使其成爲可轉動之方式，水平之樞軸之兩端部 連結到車體框架之二輪機車中，其第1特徵爲：在從引擎延鲁 伸出之迂迴後輪之排氣管之下游端，連接有排氣消音器被 配置在引擎之相反側成爲包夾後輪，經由消音器支架用來 將該排氣消音器支持在上述吊架臂之排氣消音器側端部。 另外，上述之殼體對應到後面所述之本發明之實施例中 之曲柄箱1 0，上述之連結部對應到連結軸轂3 1 ° 依照該第1特徵時，動力單元和排氣消音器被分開的配 置在後輪之左右兩側，可以獲得車體之左右之重量平衡。 另外，在排氣消音器連接有從動力單元之引擎延伸出之 ® 迁迴後輪前部之排氣管之下游端，所以該排氣管可以容易 的具有充分長度之管長，可以提高引擎之特別是低、中速 之輸出性能。 另外，不論排氣消音器是否被配置成遠離動力單元’經 由將用以支持該排氣消音器之消音器支架之前端部’緊固 到吊架臂之排氣消音器側端部，可以使用比較短之消音器 支架，用來提高排氣消音器之支持剛性。 312/發明說明書(補伯)/92-06/92107260 另外，本發明之第2特徵是除了第1特徵外，更將上述 之消音器支架之基端固定在排氣消音器，和在該消音器支 架之前端形成上下一對之連結部，該等之連結部經由緊固 構件緊固到上述之吊架臂成爲上下包夾上述之樞軸。 依照該第2特徵時，施加在吊架臂之排氣消音器之負載 被分散到樞軸之周圍，可以減輕負載集中到吊架臂，藉以 提高其耐久性。 另外，本發明之第3特徵是除了第1或第2特徵外，在 上述吊架臂之排氣消音器側端面，設置具有與上述樞軸平 行之軸線之螺絲孔，使從車體外側插穿上述連結部之上述 緊固構件之螺栓，以螺紋緊固在該螺絲孔，用來將連結部 緊固在上述之吊架臂。 依照該第3特徵時，上述螺栓之螺紋接著和緊固可以不 會與他物干涉的容易進行，可以提高消音器支架之組裝到 吊架臂之效率，而且被支持在樞軸之吊架臂之軸承孔，和 上述螺絲孔之下孔，可以利用多軸加工一舉形成，和可以 將上述之螺絲孔配置成接近樞軸，所以可以使吊架臂緊密 化。 【實施方式】 下面將根據附圖所示之本發明之一實施例用來說明本發 明之實施形態。 圖1爲具備有本發明之排氣消音器之配設構造之二輪機 車之側面圖，圖2爲圖1之主要部份擴大側面圖，圖3爲 沿著圖2中之3 - 3箭頭所作的箭視圖，圖4爲沿著圖2中 8 312/發明說明書(補伯)/92-〇6/921〇7260 583108 之4-4線所作的剖面圖。 首先在圖1中，二輪機車S之車體框架1之構成包含有： 前端框架If，用來支持前叉2成爲可操作方向，從頭管lh 延伸到下方’用來支持腳踏板3 ;和後部框架1 r，從該前 部框架1 f之後端延伸到斜上方，用來支持收納箱4，乘坐 人員用座位5和燃料箱7 ;在前叉2之下端支樞有前輪6f， 在後部框架1 r支樞後輪6r，和對其驅動之動力單元P吊掛 成可上下搖動，另外，在後部框架1 r和動力單元P之間， 安裝有後緩衝器8。另外，在前部框架if安裝有支架9用 · 來使車體自立。如此一來，二輪機車S被構建成爲小型機 車型。 如圖2和圖3所示，動力單元P是在引擎E之曲柄軸箱 10,收容曲柄軸和變速機構，被配置在後輪6r之左右之一 側，在圖中所示之實施例是被配置在右側。另外，在從曲 柄軸箱10之後部之一側壁突出之上述變速機構之輸出軸 12，安裝有後輪6r。 在引擎E之傾向車體前方之氣缸頭13之上面，經由吸 ® 氣管1 4連接到氣化器1 5，另外，在其下面結合有排氣管 1 6。該排氣管1 6彎曲成對後輪6r之前部進行大的迂迴， 在其下游端連接有排氣消音器17,被配置在動力單元P之 相反側，成爲包夾後輪^之方式。 下面將參照圖2〜圖4用來說明上述之動力單元P之吊 架裝置。 如圖3和圖4所示，在被固定於前部框架1 f之後端部之 9 312/發明說明書(補伯)/92-06/92107260 583108 左右側面之支持腕20、20之前端，熔接有左右一對之支架 21、21，在該等之支架21、21，經由水平之第1樞軸23 連結有懸架連桿22成爲可搖動之方式。懸架連桿22具備 有1根之前部臂22a，和左右一對之後部臂22b、22b，該 前部臂22a經由緩衝橡膠25***和被支承在前部框架If 之後端部內。 另外一方面，在引擎E之曲柄軸箱10,成爲一體的形成 有吊架臂26。該吊架臂26之構成包含有：臂部26a，從曲 柄軸箱1 〇之前面，朝向後輪6r之前方突出，和朝向後輪 φ 6ι:之旋轉中心面0傾斜的突出；和軸承軸轂26b，從該臂 部2 6a之前端延伸到左右，被配置成爲水平，在後輪6r之 前方橫切其旋轉中心面0(換言之車體之縱向中心面），從軸 承軸轂26b延伸到臂部26a的設置貫穿之孔28。 在軸承軸轂26b之軸承孔之兩端部分別壓入有橡膠襯套 27、27。該軸承軸轂26b被配置在懸架連桿22之左右兩後 部臂22b、2 2b之後端部間，經由左右之橡膠襯套27、27 將軸承軸轂26b支承成爲可轉動，水平之第2樞軸24之兩 ® 端結合到兩個後部臂22b、22b。因此，動力單元P可以在 第2樞軸24之周圍上下搖動，從該動力單元P對懸架連桿 22施加之搖動衝擊力被緩衝橡膠25吸收。 上述之排氣消音器17利用上述之動力單元P之吊架裝 置，以下面所述之方式被支持。 在排氣消音器17之上面，熔接有消音器支架30之基端。 該消音器支架30之前端部，分支成爲上下之二個股部 10 312/發明說明書(補伯)/92-06/92107260 583108 3 0a、3 0a，在該二個股部30a、30a之前端，固定有一對之 連結柱3 1、3 1，具有與上述之第2樞軸24平行之軸線。 另外一方面，在上述之吊架臂26之軸承軸轂26b之排氣消 音器音器17側端部，形成有消音器安裝部32、32(特別參 照圖2)，上下膨出的包夾第2樞軸24。因此，軸承軸轂 2 6b之排氣消音器1 7側端面，比動力單元P側端面大該消 音器安裝部32、32之部份。在該等之消音器安裝部32、 32之端面設有一對之螺絲孔33、33，上下包夾第2樞軸 24，而且具有與其平行之軸線。另外，從車體外側方插穿鲁 該消音器支架30之一對之連結柱31、31之螺栓34、34， 經由使其以螺紋結合緊固在消音器安裝部32、32之一對之 螺絲孔33、33，可以用來使連結柱31、31緊固在軸承軸 穀26b之端面。 下面將說明本實施例之作用。 在二輪機車S之行走中，假如後輪隨著路面之凹凸進 行升降時，因爲用以支持後輪6r而且具備有與吊架臂26 成爲一體之動力單元P，和經由消音器支架30被支持在吊 # 架臂26之排氣消音器17成爲一體，所以圍繞第2樞軸24 上下搖動，利用後緩衝器8可以緩衝其上下搖動。 因爲動力單元Ρ和排氣消音器17分別被配置在後輪6r 之左右兩側，所以可以極力的獲得車體之左右之重量平 衡。另外，動力單位P不只限於被配置在後輪6r之一側， 亦可以將支持後輪或動力單元p，排氣消音器丨7等之 重量物之吊架臂26 ’配置成爲橫切後輪6r之旋轉中心面 11 312/發明說明書(補伯)/92-06/92107260 583108 0，用來極力的避免對包含吊架臂26和第2樞軸24之吊架 裝置施加偏移負載，可以用來改良二輪機車S之乘坐舒適 感覺。 另外，在排氣消音器17因爲連接有從動力單元Ρ之引擎 Ε延伸而出之迂迴後輪6r之前部之排氣管1 6之下游端’ 所以在該排氣管16可以易於具有充分之長度之管長，可以 提高引擎E之特別是低、中速之輸出性能。 另外，不論排氣消音器17是否被配置成遠離動力單元 P，經由將對其支持之消音器支架30之前端部，緊固在吊參 架臂26之軸承軸轂26b之排氣消音器17側端部，可以使 用比較短之消音器支架30，可以提高排氣消音器17之支 持剛性，可以保證具有穩定之支持。 特別是因爲消音器支架30之二個股部30a、30a之連結 柱31、31，上下包夾第2樞軸24，被緊固在吊架臂26之 軸承軸轂26b之一對之消音器安裝部32、32，所以施加在 吊架臂26之排氣消音器17之負載被分散到第2樞軸24之 周圍，可以減輕負載之集中到吊架臂26，可以提高其耐久 ® 性。 另外，當將消音器支架30組裝到吊架臂26時，使從車 體外側方插穿連結柱31、31之螺栓34、34，以螺紋緊固 在螺絲孔33、33(開口在吊架臂26之軸承軸轂26b之消音 器安裝部32、32之端面），所以螺栓34、34之以螺紋緊固 可以容易的進行而不會與他物干擾，可以使消音器支架30 之組裝到吊架臂26之效率成爲非常良好。 12 312/發明說明書(補伯)/92-06/92107260 583108 另外，因爲該一對之螺絲孔33、33被設在軸承軸轂26b 之一對之消音器安裝部32、32之端面’成爲與第2樞軸 2 4平行，所以利用多軸加工可以一舉形成軸承軸轂2 6 b之 軸承孔和螺絲孔3 3、3 3之下孔’而且可以將螺絲孔3 3、 33配置成接近第2樞軸24 ’可以使軸承軸轂26b緊密化。 本發明並不只限於上述之實施例，在不脫離其主旨之範 圍內可以進行各種之設計變更。例如可以利用螺栓將消音 器之兩端部固定在排氣消音器和吊架臂。另外，亦可以與 上述之實施例相反的’使消音器成爲一體的形成在吊架鲁 臂，利用螺栓將其前端之消音器支柱固定在排氣消音器。 依照上述方式之本發明之第1特徵時’在由引擎和用來 使後輪連結到輸出軸之變速機構成動力單元’將動力單元 配置在後輪之左右之一側’水平樞軸用來支持形成在該動 力單元之殼體之吊架臂使其成爲可轉動之方式，水平之樞 軸之兩端部連結到車體框架之二輪機車中’在從引擎延伸 出之迂迴後輪之排氣管之下游端’連接有排氣消音器被配 置在引擎之相反側成爲包夾後輪’經由消音器支柱用來將 ® 該排氣消音器支持在上述吊架臂之排氣消音器側端部；所 以動力單元和排氣消音器變成被分開的配置在後輪之左右 兩側，可以極力的獲得車體之左右之重量平衡’另外’在 排氣消音器連接有從動力單元之引擎延伸出之迂迴後輪前 部之排氣管之下游端，所以該排氣管可以容易的具有充分 長度之管長，可以提高引擎之特別是低，中速之輸出性能。 另外，不論排氣消音器是否被配置成遠離動力單元，經由 13 312/發明說明書(補伯)/92-06/92107260 將對其支持之消音器支架之前端部緊固到吊架臂 音器側端部，可以使用比較短之消音器支架，用 氣消音器之支持剛性。 另外，本發明之第2特徵是除了第1特徵外， 之消音器支架之基端固定在排氣消音器，和在該 架之前端形成上下一對之連結部，該等之連結部 構件緊固到上述之吊架臂成爲上下包夾上述之樞 施加在吊架臂之排氣消音器之負載被分散到樞軸 可以減輕負載集中到吊架臂，藉以提高其耐久性 另外，本發明之第3特徵是除了第1或第2特 上述吊架臂之排氣消音器側端面，設置具有與上 行之軸線之螺絲孔，使從車體外側插穿上述連結 緊固構件之螺栓，以螺紋緊固在該螺絲孔，用來 緊固在上述之吊架臂，所以上述螺栓之螺紋接著 以不會與他物干涉的容易進行，可以提高消音器 裝到吊架臂之效率，而且被支持在樞軸之吊架 孔，和上述螺絲孔之下孔，可以利用多軸加工一 和可以將上述之螺絲孔配置成接近樞軸，所以可 臂緊密化。 【圖式簡單說明】 圖1爲具備有本發明之排氣消音器之配設構造 車之側面圖。 圖2爲圖1之主要部份之擴大側面圖。 圖3爲沿著圖2中之3 - 3箭頭所作的箭視圖。 312/發明說明書(補伯)/92-06/92107260 之排氣消 來提高排 更將上述 消音器支 經由緊固 軸，所以 之周圍， 〇 徵外，在 述樞軸平 部之上述 將連結部 和緊固可 支架之組 臂之軸承 舉形成， 以使吊架 之二輪機 14 583108 圖4爲沿著圖2中之4-4線所作的剖視圖。 (元件符號說明） E 引擎 P 動力單元 S 二輪機車 T 變速機 1 車體框架 If 前端框架 lh 頭管 lr 後部框架 2 前叉 3 腳踏板 4 收納箱 5 座位 6f 前輪 6 r 後輪 7 燃料箱 8 緩衝器 9 支架 10 殻體（曲柄軸箱） 12 輸出軸 13 氣缸頭 14 吸氣管 15 氣化器 312/發明說明書(補伯)/92-06/92107260 15 583108 16 排氣管 17 排氣消音器 20 支持腕 2 1 支架 22 懸架連桿 22a 前部臂 22b 後部臂 23 樞軸（第1樞軸） 2 4 樞軸（第2樞軸） 25 緩衝橡膠 26 吊架臂 26a 臂部 2 6b 軸承軸轂 27 襯套 28 貫穿孔 30 消音器支架 30a 股部 3 1 消音器支架之連結部（連結柱） 32 吊架臂之消音器安裝部 3 3 螺絲孔 34 緊固構件（螺栓） 16583108 说明, postponed explanation ........., ϋ .....---'' =-....., .... ... _ [Technology to which the invention belongs Field: The present invention relates to a two-wheeled locomotive. A power unit is disposed on one of the left and right sides of the rear wheel and is composed of a transmission for connecting the rear wheel to an output shaft. Both ends of a horizontal pivot shaft are connected to a vehicle body frame. The horizontal pivot is used to support the boom arm formed in the casing of the power unit to make it rotatable. The present invention is particularly related to the structure in which the exhaust muffler of the engine is provided on the power unit. [Prior art] φ The two-wheeled locomotive learner of the above method is as disclosed in Japanese Patent Application Laid-Open No. 1 1-2 125. In the conventional two-wheeled locomotive, the exhaust muffler of the engine is provided on the left and right sides of the rear wheel together with the power unit, and is installed at an appropriate position of the power unit. [Summary of the Invention] (Problems to be Solved by the Invention) In the configuration of the exhaust muffler of the conventional two-wheeled locomotive, the exhaust muffler can be strongly supported by the adjacent arrangement of the power unit and the exhaust muffler. On the reverse side of the power unit, the weight of the power unit containing the exhaust muffler becomes concentrated on the left and right sides of the rear wheel, and the length of the exhaust pipe connected between the engine and the exhaust muffler is not easy to set. Full length. The present invention is directed to the above problems, and an object thereof is to provide an exhaust muffler structure of a two-wheeled locomotive, which can disperse the weight of the power unit and the exhaust muffler to the left and right sides of the rear wheel, and at the same time, the exhaust The gas muffler 6 312 / Invention Manual (Bubo) / 92-06 / 92107260 583108 supports the power unit, and the length of the exhaust pipe can be set to have a sufficient length. (Means for Solving the Problem) A first feature of the present invention for achieving the above-mentioned object is an arrangement structure of an exhaust muffler of a two-wheeled locomotive, which is composed of an engine and a transmission for connecting a rear wheel to an output shaft. The power unit is arranged on the left and right sides of the rear wheel. The horizontal pivot is used to support the hanger arm formed in the housing of the power unit to make it turnable. Both ends of the horizontal pivot The first feature of the two-wheeled locomotive connected to the body frame is that at the downstream end of the exhaust pipe of the detoured rear wheel extending from the engine, an exhaust muffler is connected on the opposite side of the engine to form a package. The rear wheel is clamped, and the exhaust muffler is used to support the exhaust muffler at the end of the exhaust muffler side of the hanger arm through the muffler bracket. In addition, the above-mentioned housing corresponds to the crank case 10 in the embodiment of the present invention described later, and the above-mentioned connecting portion corresponds to the connecting hub 3 1 °. According to the first feature, the power unit and the exhaust muffler Separately arranged on the left and right sides of the rear wheel, the right and left weight balance of the car body can be obtained. In addition, the exhaust muffler is connected to the downstream end of the exhaust pipe which is extended from the engine of the power unit and moved back to the front of the rear wheel, so the exhaust pipe can easily have a sufficient tube length, which can improve the engine Especially low and medium speed output performance. In addition, regardless of whether the exhaust muffler is disposed away from the power unit 'via the front end of the muffler bracket supporting the exhaust muffler' is fastened to the exhaust muffler side end of the hanger arm, it can be used The shorter muffler bracket is used to improve the support rigidity of the exhaust muffler. 312 / Invention Manual (Bubo) / 92-06 / 92107260 In addition, the second feature of the present invention is that in addition to the first feature, the base end of the above-mentioned muffler bracket is fixed to the exhaust muffler, and the muffler is A pair of upper and lower connecting portions are formed at the front end of the holder, and these connecting portions are fastened to the hanger arm through a fastening member to become the pivot pinching the above. According to this second feature, the load of the exhaust muffler applied to the hanger arm is distributed around the pivot, and the load can be reduced to the hanger arm to improve its durability. In addition, in a third feature of the present invention, in addition to the first or second feature, a screw hole having an axis parallel to the pivot axis is provided on the end face of the exhaust muffler side of the hanger arm, so as to be inserted from the outside of the vehicle body. The bolt passing through the fastening member of the connecting portion is fastened to the screw hole with a thread to fasten the connecting portion to the hanger arm. According to this third feature, the screwing and tightening of the above-mentioned bolts can be performed easily without interference with other objects, which can improve the efficiency of assembling the muffler bracket to the hanger arm, and is supported by the hanger arm of the pivot. The bearing holes and the holes below the screw holes can be formed in one stroke by multi-axis machining, and the screw holes can be arranged close to the pivot, so the hanger arm can be made compact. [Embodiment] An embodiment of the present invention will be described below according to an embodiment of the present invention shown in the accompanying drawings. FIG. 1 is a side view of a two-wheeled locomotive equipped with an exhaust muffler of the present invention, FIG. 2 is an enlarged side view of a main part of FIG. 1, and FIG. 3 is a view taken along arrows 3-3 in FIG. 2. FIG. 4 is a sectional view taken along line 4-4 of 8 312 / Invention Specification (Bubo) / 92-〇6 / 921〇7260 583108 in FIG. 2. First, in FIG. 1, the structure of the body frame 1 of the two-wheeled locomotive S includes: a front frame If to support the front fork 2 to become an operable direction, extending from the head pipe lh to the bottom 'to support the foot pedal 3; and The rear frame 1 r extends obliquely from the rear end of the front frame 1 f to support the storage box 4, the passenger seat 5 and the fuel tank 7; the front wheel 6f is pivoted under the front fork 2 at the rear The frame 1 r pivots the rear wheel 6r and the power unit P driven by the frame 1 r is swingable up and down. In addition, a rear bumper 8 is installed between the rear frame 1 r and the power unit P. In addition, a bracket 9 is attached to the front frame if so that the vehicle body can stand on its own. In this way, the two-wheeled locomotive S is constructed as a small-sized vehicle. As shown in FIGS. 2 and 3, the power unit P is a crankshaft box 10 of the engine E, which houses the crankshaft and the transmission mechanism, and is arranged on one of the left and right sides of the rear wheel 6r. The embodiment shown in the figure is Is configured on the right. Further, a rear wheel 6r is attached to the output shaft 12 of the above-mentioned transmission mechanism protruding from one side wall of the rear portion of the crankcase 10. The top of the cylinder head 13 in front of the body of the engine E is connected to the carburetor 15 through a suction pipe 14 and an exhaust pipe 16 is connected below it. The exhaust pipe 16 is bent to make a large detour to the front of the rear wheel 6r. An exhaust muffler 17 is connected to the downstream end of the exhaust pipe 16. The exhaust pipe 16 is arranged on the opposite side of the power unit P to form a way to enclose the rear wheels. The suspension device of the power unit P described above will be described below with reference to FIGS. 2 to 4. As shown in Fig. 3 and Fig. 4, after being fixed to the front frame 1 f, the end 9 312 / Invention Manual (Bubo) / 92-06 / 92107260 583108 The left and right side support wrists 20, 20 are welded to the front ends, and are welded. There is a pair of left and right brackets 21 and 21, and a suspension link 22 is connected to the brackets 21 and 21 via a horizontal first pivot shaft 23 so as to be able to swing. The suspension link 22 includes one front arm 22a and a pair of left and right rear arms 22b, 22b. The front arm 22a is inserted and supported in the rear end of the front frame If via a cushion rubber 25. On the other hand, the crankcase 10 of the engine E is integrally formed with a hanger arm 26. The structure of the hanger arm 26 includes an arm portion 26a, which protrudes from the front surface of the crank case 10, in front of the rear wheel 6r, and protrudes toward the rotation center plane 0 of the rear wheel φ 6ι :, and a bearing shaft. The hub 26b extends horizontally from the front end of the arm portion 26a to the left and right, and is arranged horizontally, in front of the rear wheel 6r, transversely to its rotation center plane 0 (in other words, the longitudinal center plane of the vehicle body), and extends from the bearing hub 26b to The arm portion 26 a is provided with a through hole 28. Rubber bushes 27 and 27 are respectively pressed into both ends of the bearing hole of the bearing hub 26b. The bearing hub 26b is disposed between the rear ends of the left and right rear arms 22b and 22b of the suspension link 22. The bearing hub 26b is rotatably supported by the left and right rubber bushes 27 and 27, and is a horizontal second pivot. Both ends of the shaft 24 are coupled to the two rear arms 22b, 22b. Therefore, the power unit P can swing up and down around the second pivot shaft 24, and the rocking impact force applied from the power unit P to the suspension link 22 is absorbed by the buffer rubber 25. The above-mentioned exhaust muffler 17 is supported by the above-mentioned hanger unit of the power unit P in the manner described below. A base end of the muffler holder 30 is fused to the exhaust muffler 17. The front end of the muffler bracket 30 is branched into two upper and lower thighs 10 312 / Invention Specification (Bubo) / 92-06 / 92107260 583108 3 0a, 3 0a, fixed at the front ends of the two thighs 30a, 30a, and fixed There are a pair of connecting posts 31, 31, which have an axis parallel to the second pivot 24 described above. On the other hand, at the end of the exhaust muffler 17 side of the bearing hub 26b of the hanger arm 26 described above, muffler mounting portions 32 and 32 (see FIG. 2 in particular) are formed, and the bag is bulged up and down. The second pivot 24. Therefore, the end face of the exhaust muffler 17 on the bearing hub 26b is larger than the end face of the power unit P on the side of the muffler mounting portion 32, 32. A pair of screw holes 33 and 33 are provided on the end faces of the muffler mounting portions 32 and 32, and the second pivot shaft 24 is sandwiched up and down, and has an axis parallel thereto. In addition, the bolts 34 and 34 of one of the pair of muffler brackets 30 and 31 of the muffler bracket 30 are inserted through the outer side of the vehicle body and fastened to one of the muffler mounting portions 32 and 32 by screwing. The screw holes 33 and 33 can be used to fasten the connecting posts 31 and 31 to the end face of the bearing shaft valley 26b. The effect of this embodiment will be described below. During the travel of the two-wheeled locomotive S, if the rear wheels are raised and lowered in accordance with the unevenness of the road surface, the rear wheel 6r is supported by the power unit P integrated with the hanger arm 26, and is supported by the muffler bracket 30. The exhaust muffler 17 in the suspension arm 26 is integrated, so it swings up and down about the second pivot 24, and the rear shock absorber 8 can be used to cushion the swinging up and down. Since the power unit P and the exhaust muffler 17 are respectively disposed on the left and right sides of the rear wheel 6r, the weight balance between the left and right sides of the vehicle body can be obtained as much as possible. In addition, the power unit P is not limited to being disposed on one side of the rear wheel 6r, and a hanger arm 26 'supporting the weight of the rear wheel or the power unit p, the exhaust muffler, and the like can also be disposed to cross the rear wheel. 6r's rotation center plane 11 312 / Invention Specification (Bubo) / 92-06 / 92107260 583108 0, is used to avoid the offset load on the hanger device including the hanger arm 26 and the second pivot 24 as much as possible. It is used to improve the riding comfort of motorcycle S. In addition, since the exhaust muffler 17 is connected to the downstream end of the exhaust pipe 16 extending in front of the detoured rear wheel 6r extending from the engine E of the power unit P, the exhaust pipe 16 can easily have sufficient The length of the tube length can improve the performance of the engine E, especially low and medium speed. In addition, regardless of whether the exhaust muffler 17 is arranged away from the power unit P, the exhaust muffler 17 is fastened to the bearing hub 26b of the suspension frame arm 26 via the front end of the muffler bracket 30 that will be supported by it. The side end can use a relatively short muffler bracket 30, which can improve the support rigidity of the exhaust muffler 17, and can ensure stable support. In particular, since the connecting posts 31, 31 of the two thighs 30a, 30a of the muffler bracket 30, the second pivot 24 is sandwiched up and down, and it is fastened to one of the bearing hubs 26b of the hanger arm 26 to install the muffler The parts 32, 32, so that the load of the exhaust muffler 17 applied to the hanger arm 26 is distributed around the second pivot 24, and the load can be reduced to the hanger arm 26, which can improve its durability. In addition, when the muffler bracket 30 is assembled to the hanger arm 26, the bolts 34 and 34 of the connecting pillars 31 and 31 are inserted from the outside of the vehicle body and fastened to the screw holes 33 and 33 (the opening is in the hanger). The bearing 26 of the arm 26, the end faces of the muffler mounting portions 32, 32), so the bolts 34, 34 can be easily tightened with threads without interference with other objects, so that the muffler bracket 30 can be assembled to The efficiency of the hanger arm 26 becomes very good. 12 312 / Invention specification (Bubo) / 92-06 / 92107260 583108 In addition, because the screw holes 33 and 33 of the pair are provided on the end faces of the muffler mounting portions 32 and 32 of one pair of the bearing hub 26b, it becomes Parallel to the second pivot 24, so multi-axis machining can be used to form bearing holes and screw holes 3 3, 3 3 of the bearing hub 2 6 b at one stroke, and the screw holes 3 3 and 33 can be arranged close to each other. The second pivot shaft 24 ′ can make the bearing hub 26 b compact. The present invention is not limited to the above-mentioned embodiments, and various design changes can be made without departing from the spirit thereof. For example, the both ends of the muffler can be fixed to the exhaust muffler and the hanger arm with bolts. Alternatively, the muffler may be formed integrally on the hanger arm and the muffler pillar at the front end thereof may be fixed to the exhaust muffler with a bolt, which is opposite to the above embodiment. According to the first feature of the present invention as described above, when the power unit is composed of an engine and a transmission for connecting the rear wheels to the output shaft, the power unit is disposed on one of the left and right sides of the rear wheels. The suspension arm formed in the housing of the power unit is supported to make it rotatable. The two ends of the horizontal pivot are connected to the two-wheeled locomotive of the body frame. At the downstream end of the air pipe, an exhaust muffler is connected to the opposite side of the engine, and it becomes a double-wheeled rear wheel. The muffler strut is used to support the exhaust muffler on the exhaust muffler side of the boom arm. The end; so the power unit and the exhaust muffler are separated and arranged on the left and right sides of the rear wheel, and the weight balance between the left and right sides of the car body can be obtained as much as possible. The downstream end of the exhaust pipe extending around the front of the rear wheel is round, so the exhaust pipe can easily have a sufficient pipe length, which can improve the performance of the engine, especially low and medium speed. In addition, regardless of whether the exhaust muffler is configured away from the power unit, the front end of the muffler bracket supported by it is fastened to the hanger arm sounder via 13 312 / Invention Specification (Bubo) / 92-06 / 92107260 Side end, you can use a shorter muffler bracket, rigid with the support of gas muffler. In addition, the second feature of the present invention is that in addition to the first feature, the base end of the muffler bracket is fixed to the exhaust muffler, and a pair of upper and lower connection portions are formed at the front end of the frame, and the connection portion components are tight. The hanger arm fixed to the above becomes the upper and lower envelopes. The load of the exhaust muffler applied to the hanger arm is distributed to the pivot, which can reduce the load and concentrate on the hanger arm, thereby improving its durability. In addition, the invention A third feature is that in addition to the exhaust muffler side end face of the suspension arm of the first or second special feature, a screw hole having an axis with the upward movement is provided, so that the bolt of the connection fastening member is inserted from the outside of the vehicle body, and the thread is threaded. It is fastened in the screw hole to fasten the hanger arm, so the screw thread of the bolt can be easily carried out without interfering with other objects, which can improve the efficiency of the muffler mounted on the hanger arm, and is supported. The hanger hole of the pivot and the hole below the screw hole can be processed by multi-axis and the screw hole can be arranged close to the pivot, so the arm can be compacted. [Brief Description of the Drawings] Fig. 1 is a side view of a vehicle equipped with an exhaust muffler equipped with the present invention. FIG. 2 is an enlarged side view of a main part of FIG. 1. FIG. FIG. 3 is an arrow view taken along arrows 3-3 in FIG. 2. 312 / Invention Specification (Bubo) / 92-06 / 92107260 The exhaust muffler is used to improve the exhaust. The muffler is supported through the fastening shaft. Therefore, the surroundings are not connected. The above will be connected in the flat part of the pivot. The bearing of the upper part and the group arm for fastening the bracket can be formed so that the two turbines of the hanger 14 583108 FIG. 4 is a sectional view taken along line 4-4 in FIG. 2. (Description of component symbols) E Engine P Power unit S Two-wheeled locomotive T Speed changer 1 Body frame If Front frame lh Head tube lr Rear frame 2 Front fork 3 Foot pedal 4 Storage box 5 Seat 6f Front wheel 6 r Rear wheel 7 Fuel tank 8 Bumper 9 Bracket 10 Housing (Crankshaft box) 12 Output shaft 13 Cylinder head 14 Suction tube 15 Vaporizer 312 / Invention manual (Bubo) / 92-06 / 92107260 15 583108 16 Exhaust pipe 17 Exhaust Muffler 20 Support wrist 2 1 Bracket 22 Suspension link 22a Front arm 22b Rear arm 23 Pivot (first pivot) 2 4 Pivot (second pivot) 25 Cushion rubber 26 Hanger arm 26a Arm part 2 6b Bearing hub 27 Bushing 28 Through-hole 30 Silencer bracket 30a Strand 3 1 Silencer bracket connecting portion (connecting post) 32 Silencer mounting portion of hanger arm 3 3 Screw hole 34 Fastening member (bolt) 16
312/發明說明書(襯白)/92-06/92107260312 / Invention Manual (lining white) / 92-06 / 92107260