經濟部智慧財產局員工消費合作社印製 發明背景 發明範圍： 本發明係關於一後部單位結構，其供如速克達摩托車 之摩托車使用。 相關技藝之描述： 如附圖第9、第1〇圖所示，如速克達摩托車之摩托車 的後部單位包括-引擎52，其設置在靠近_對橫向相隔的 旋臂51a，51B上，該旋臂懸掛一後輪；一消音器53和一空 氣清潔器54，其等連接至該引擎52而成為個別的零件並緊 密地設置在該引擎52上；和一蓋住該後輪5〇之一部分而成 為一個別零件之後擋泥板（未顯示出）。 由於該旋臂51&，5113、該消音器53、該空氣清潔器54 和該後擋泥板為個別的部件，所以該後部單位由包括這些 附屬至這些個別部件的許多零件組成。因此，組合該後部 單位是費力及費時的，且該後部占去一大的襞置空間，導 致该摩托車之一大的體積和重量。 因此本發明t 一目#為設置一供摩托車使用的一後部 單位結構，其由-減少數量的零件組成以減少製造和組合 該後部單位結構的成本並減少該摩托車的體積和重量 為達到上述的目的，根據本發明的一第一態樣，設置 -後部單位結構在-有—旋臂的摩托車上，其包括一被裝 入该摩托車之旋臂内的空氣清潔器裝置。 如果被裝入該旋臂之空氣清潔器提供清潔的空氣至一 -n ie / mm— tmmf I t ϋ I ϋ I ϋ 1 ammmm n n 一-«J n ϋ ϋ —m mmmt ϋ ϋ I (請先閱讀背面之注意事項再填寫本頁) -4- 經濟部智慧財產局員工消費合作社印製 509639 A7 B7 五、發明說明（、 引擎的汽化器，一元件就能夠同時完成一後部的懸掛功能 和一空氣清潔功能。因此，使用零件的數量可以被減少， 製造和組合該後部結構的成本可以被減少，且該摩托車的 體積和重量也可以被減少。 把該空氣清潔器裝置裝入該旋臂内，兩個被壓縮成形 以產生凸出部的鋼片可能彼此連接，且一進氣室可能被限 定在該凸出部。 根據本發明的第二態樣，設置一後部單位結構在一有 一旋臂的摩托車上，其包括一被裝入該摩托車之旋臂内的 消音器裝置。 如果被裝入該旋臂内的消音器裝置裝有一從一引擎放 出的廢氣’一元件就能夠同時完成一後部懸掛功能和一消 音功能。因此，使用零件的數量可以被減少，製造和組合 該後部單位結構的成本可以被減少，且該摩托車的體積和 重量也可以被減少。 把消音器裝置裝入該旋臂内，兩個被壓縮成形以產生 凸出腹板部的鋼片可能彼此連接以提供一氣體管道，且膨 脹室可能被限定在該氣體管道内。 根據本發明的第二態樣’設置一後部單位結構在一有 一旋臂的摩托車上，包括被裝入該摩托車之旋臂内的一空 氣清潔器裝置和一消音器裝置。 特別地，該空氣清潔器裝置被裝在一左邊的旋臂，而 該消音器裝置被裝在一右邊的旋臂。由於這種裝配，使用 零件的數量可以被減少，製造和組合該後部單位結構的成 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） l·--V-----------^---------------β (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 A7 ^--------B7____ 五、發明說明（、 本可以被減少，且該摩托車的體積和重量也可以被減少。 根據本發明的第四態樣，設置一後部單位結構在一有 一後擋泥板的摩托車上，包括被裝入該摩托車之後擋泥板 内的一空氣清潔器裝置。 如果該空氣清潔器裝置被裝入該後擋泥板，使用零件 的數量可以被減少，製造和組合該後部結構的成本可以被 減少，且該摩托車的體積和重量也可以被減少。 把空氣清潔器裝置裝入該後擋泥板内，兩個被壓縮成 形以產生凸出部的鋼片或纖維補強樹脂片可能彼此連接， 且一進氣室可能被限定在該凸出部内。 根據本發明的第五態樣，設置一後部單位結構在一有 一後擋泥板的摩托車上，包括被裝入該摩托車之後擋泥板 的一消音器裝置。 如果該消音器裝置被裝入該後擋泥板，使用零件的數 量可以被減少，製造和組合該後部單位結構的成本可以被 減少，且該摩托車的體積和重量也可以被減少。 把消音器裝置裝入該後擋泥板内，兩個被壓縮成形以 產生凸出腹板部的鋼片可能彼此連接以提供一氣體管道， 且膨脹室可能被限定在該氣體管道内。 根據本發明的第六態樣，設置一後部單位結構在一有 一旋臂的摩托車上，包括被裝入該摩托車之旋臂内的一空 氣清潔器裝置和一消音器裝置。 特別地’該後擋泥板完成一旋臂功能，該空氣清潔器 裝置被裝入一左邊的後擋泥板元件，而該消音器裝置被裝 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） I i d ϋ ϋ I Biv an tj 1 I ϋ n I n l ϋ in 一-口，· ϋ n I ϋ ϋ ϋ ϋ I (請先閱讀背面之注意事項再填寫本頁) -6- l· I III I I I I I I 11 I I I I I I I I — — — — — — — — — (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 509639 A7 _______B7___ 五、發明說明（5 入一右邊的後擋泥板元件《由於這種裝配，使用零件的數 量可以被減少，製造和組合該後部單位結構的成本可以被 減少，且該摩托車的體積和重量也可以被減少。 如果使用兩個旋臂或兩個後擋泥板元件，而該旋臂或 兩個後擂泥板元件之一可能被建構成一纖維補強的樹脂 片，而另一旋臂或擋泥板元件可能被建構成一鋼片。如果 這些旋臂或後擋泥板元件由不同的材料建構成，則被加熱 至一高溫的空氣清潔器裝置被安裝在該旋臂或由一纖維補 強樹脂片建構成的後擋泥板元件上，而被加熱至一高溫的 消音器裝置則被安裝在該旋臂或由一鋼片組成的後擋泥板 元件上。 當連同伴隨例示本發明之較佳具體實施例的圖示以作 為例子時，本發明之上述或其它目的、特徵和優點將會從 下列的描述中變得更顯著。 圖式簡要說明 第1圖為一根據本發明之一具體實施例的具有一後部 單位結構之一摩托車的側視圖，該後部單位結構包括各自 被裝入旋臂内之一空氣清潔器裝置和一消音器裝置·， 第2圖為一裝有該空氣清潔器裝置於其内之旋臂的透 視圖； 第3圖為一沿著第2圖之線的橫戴面商； 第4圖為-裝有該消音器裝置於其内之旋臂的透視 圖； 第5圖為一沿著第4圖之線v_v的橫戴面圖； 本紙張尺度適用中國國家標準（ϋ·Α4規格咖x 297公爱)—------ A7 A7 經 濟 部 智 慧 財 產 局 員 工 消 費 合 作 社 印 製 内 中 五、發明說明（5) 第6圖為一沿著第5圖之線VI-VI的橫截面圖； 第7圖為一根據本發明之另一具體實施例的具有一後 部單位結構之一摩托車的側視圖，該後部單位結構包括被 裝入一後擋泥板内之一空氣清潔器裝置和一消音器裝置； 第8圖為一沿著第7圖之線W-W的橫截面圖； 第9圖為一包括一消音器之一傳統後部單位的不完整 立體圖；且 第10圖為一包括一空氣清潔器之該傳統後部單位的不 完整立體圖。 較佳具體實施例的詳細說明 根據本發明之一具體實施例，第丨圖至第6圖顯示一後 部單元結構，該後部結構包括各自被裝入旋臂内之一空氣 /月潔器裝置和一消音器裝置。 、 如第1圖所示，一如一速克達型摩托車的摩托車丨有一 對橫向有間隔的旋臂3a、3b(也如第2和第4圖）在一被懸掛 地支標的後輪2間。該左邊的旋臂3a在其内裝有一空氣清 表器4置，而该右邊的旋臂3 b在其内裝有一消音器裝置。 因此，每一旋臂3a、3b完成數個功能。 如第2、第3圖所示，有一空氣清潔器裝置被襞入其 的旋臂3a包括鋼片的兩個被壓縮部分5、6，其具有凸出 央區域和彼此熔接在一起之周圍邊緣。該被壓縮部分5、 的凸出中央區域限定一進氣室Μ在其内中間。為一外部部 分之被壓縮部分6的凸出中央區域有一窗处，其被可分離 地連接至一具有進氣孔之空氣清潔蓋7。 --I--— — — — — HI ·1111111 ^«1 —-- (請先閱讀背面之注意事項再填寫本頁)Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economics Background of the Invention Scope of the Invention: The present invention relates to a rear unit structure, which is used for motorcycles such as Sukhoda motorcycles. Description of related skills: As shown in Figures 9 and 10 of the accompanying drawings, the rear unit of a motorcycle such as a Scooter motorcycle includes -engine 52, which is arranged near the pair of laterally spaced swing arms 51a, 51B. The swivel arm suspends a rear wheel; a muffler 53 and an air cleaner 54, which are connected to the engine 52 to become individual parts and are tightly arranged on the engine 52; and a cover 5 〇 part of the fender (not shown) after becoming a separate part. Since the swing arm 51 &, 5113, the muffler 53, the air cleaner 54, and the rear fender are separate parts, the rear unit is composed of many parts including these attached to these individual parts. Therefore, assembling the rear unit is laborious and time consuming, and the rear occupies a large space for installation, resulting in a large volume and weight of the motorcycle. Therefore, the present invention t 一 目 # is to provide a rear unit structure for motorcycles, which is composed of-reducing the number of parts to reduce the cost of manufacturing and combining the rear unit structure and reducing the volume and weight of the motorcycle to achieve the above According to a first aspect of the present invention, a rear unit structure is provided on a motorcycle with a swing arm, which includes an air cleaner device installed in a swing arm of the motorcycle. If the air cleaner installed in the arm provides clean air to -n ie / mm— tmmf I t ϋ I ϋ I ϋ 1 ammmm nn a- «J n ϋ ϋ —m mmmt ϋ ϋ I (please Read the notes on the back and fill out this page) -4- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 509639 A7 B7 V. Invention Description (, the carburettor of the engine, one component can simultaneously complete a rear suspension function and an air Cleaning function. Therefore, the number of parts used can be reduced, the cost of manufacturing and assembling the rear structure can be reduced, and the volume and weight of the motorcycle can be reduced. The air cleaner device is incorporated into the swing arm Two steel plates compressed to form a protrusion may be connected to each other, and an air intake chamber may be defined in the protrusion. According to a second aspect of the present invention, a rear unit structure is provided in a rotation. On a motorcycle with an arm, it includes a muffler device which is installed in the swing arm of the motorcycle. If the muffler device installed in the swing arm is equipped with an exhaust gas discharged from an engine, it can be A rear suspension function and a muffler function are completed at all times. Therefore, the number of used parts can be reduced, the cost of manufacturing and assembling the rear unit structure can be reduced, and the volume and weight of the motorcycle can be reduced. The device is installed in the spiral arm, two steel sheets compressed to form a protruding web portion may be connected to each other to provide a gas pipe, and an expansion chamber may be confined in the gas pipe. Aspect 'is provided with a rear unit structure on a motorcycle with a swing arm, including an air cleaner device and a muffler device which are installed in the swing arm of the motorcycle. In particular, the air cleaner device is The left arm is installed on the left, and the muffler device is installed on the right arm. Because of this assembly, the number of parts used can be reduced. The cost of manufacturing and combining the rear unit structure is based on Chinese national standards. (CNS) A4 specifications (210 X 297 mm) l · --V ----------- ^ --------------- β (Please read the back first (Please fill in this page again) A7 printed by the Consumer Cooperative of the Property Bureau ^ -------- B7____ V. Description of the invention (, could have been reduced, and the volume and weight of the motorcycle could also be reduced. According to the fourth aspect of the present invention A rear unit structure is provided on a motorcycle with a rear fender, including an air cleaner device installed in the fender after the motorcycle. If the air cleaner device is installed in the rear fender Plate, the number of parts used can be reduced, the cost of manufacturing and assembling the rear structure can be reduced, and the volume and weight of the motorcycle can be reduced. The air cleaner device is installed in the rear fender, two Two steel sheets or fiber-reinforced resin sheets that are compression-molded to produce a protrusion may be connected to each other, and an air intake chamber may be defined within the protrusion. According to a fifth aspect of the present invention, a rear unit structure is provided on a motorcycle having a rear fender, including a muffler device after the fender is installed in the motorcycle. If the muffler device is incorporated in the rear fender, the number of parts used can be reduced, the cost of manufacturing and assembling the rear unit structure can be reduced, and the volume and weight of the motorcycle can be reduced. When a muffler device is installed in the rear fender, two steel sheets compressed to form a protruding web portion may be connected to each other to provide a gas pipe, and an expansion chamber may be confined within the gas pipe. According to a sixth aspect of the present invention, a rear unit structure is provided on a motorcycle having a swing arm, including an air cleaner device and a muffler device which are housed in the swing arm of the motorcycle. In particular, 'the rear fender performs a swing arm function, the air cleaner device is installed in a left rear fender element, and the muffler device is installed in this paper. The size of the paper is applicable to China National Standard (CNS) A4 specifications. (210 X 297 mm) I id ϋ ϋ I Biv an tj 1 I ϋ n I nl ϋ in one-mouth, · ϋ n I ϋ ϋ ϋ ϋ I (Please read the precautions on the back before filling this page)- 6- l · I III IIIIII 11 IIIIIIII — — — — — — — — (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 509639 A7 _______B7___ V. Description of the Invention (5 Into the right rear fender element "due to this assembly, the number of parts used can be reduced, the cost of manufacturing and assembling the rear unit structure can be reduced, and the volume and weight of the motorcycle can be reduced. If Using two swing arms or two rear fender elements, and one of the swing arms or two rear fender elements may be constructed as a fiber-reinforced resin sheet, while the other swing arm or fender element may Built A steel sheet. If these swivel arms or rear fender elements are constructed of different materials, an air cleaner device heated to a high temperature is installed on the swivel arm or the rear baffle constructed of a fiber-reinforced resin sheet. The mudguard element, and the muffler device heated to a high temperature is mounted on the spiral arm or the rear fender element composed of a steel sheet. When accompanied by a diagram illustrating a preferred embodiment of the present invention The above and other objects, features and advantages of the present invention will become more apparent from the following description when shown as an example. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a rear portion according to a specific embodiment of the present invention. A side view of a motorcycle with one unit structure. The rear unit structure includes an air cleaner unit and a muffler unit that are each installed in a swing arm. Figure 2 shows an air cleaner unit installed therein. Perspective view of the spiral arm; Figure 3 is a cross-section noodle quotient along the line of Figure 2; Figure 4 is a perspective view of the spiral arm with the muffler device installed therein; Figure 5 is A cross-section along the line v_v of Figure 4 Figure; This paper size applies to Chinese national standards (ϋ · A4 size coffee x 297 public love) ------- A7 A7 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives, Middle 5th, Invention Description (5) No. 6 FIG. 7 is a cross-sectional view taken along line VI-VI of FIG. 5; FIG. 7 is a side view of a motorcycle having a rear unit structure according to another embodiment of the present invention, the rear unit structure Including an air cleaner device and a muffler device installed in a rear fender; FIG. 8 is a cross-sectional view taken along the line WW of FIG. 7; FIG. 9 is a view including a muffler An incomplete perspective view of a conventional rear unit; and FIG. 10 is an incomplete perspective view of the traditional rear unit including an air cleaner. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a specific embodiment of the present invention, FIGS. 1-6 show a rear unit structure including an air / monthly cleaner device and A silencer device. As shown in Figure 1, a motorcycle like a one-speed Keda motorcycle 丨 has a pair of laterally spaced swing arms 3a, 3b (also shown in Figures 2 and 4) on a rear wheel 2 suspended from the ground between. The left arm 3a is provided with an air cleaner 4 therein, and the right arm 3b is provided with a muffler device therein. Therefore, each of the rotary arms 3a, 3b performs several functions. As shown in Figs. 2 and 3, a swivel arm 3a into which an air cleaner device is inserted includes two compressed portions 5, 6 of a steel sheet, which have a protruding central area and peripheral edges welded to each other. . The convex central region of the compressed portion 5 ′ defines an intake chamber M in the middle thereof. There is a window at the protruding central area of the compressed portion 6 of an outer portion, which is detachably connected to an air cleaning cover 7 having an air inlet hole. --I --— — — — — HI · 1111111 ^ «1 —-- (Please read the precautions on the back before filling this page)
A7 A7 經濟部智慧財產局員工消費合作社印製 五、發明說明（3 一漏斗8被容置在進氣室Μ中，該進氣室Μ被固持與 一被安裝在為一内部部分之被壓縮部分5之上的連接管9相 連。經由在空氣清潔蓋7内之進氣孔注入的空氣藉由在該 進氣室Μ内的漏斗8濾過，然後經由連接管9供應至一引擎 汽化器（未顯示出）。 該旋臂3a有兩個引擎接口 e在其被耦合至一引擎（未顯 示出）的前端以致於提供一可懸掛的結構。該旋臂3&有一 後、被建構以致於能夠拉一鏈子環繞被連接至該引擎和該 後輪2的滑輪運行。 如第4圖至第6圖所示，裝入一消音器裝置於其内的旋 臂3a包括鋼片的兩個被壓縮部分^、I〗，其有邊緣彼此溶 接在一起之呈波狀的凸出中央腹板區域。該被壓縮部分 11、12的凸出中央腹板區域限定一呈波狀的氣體管道，其 包括數個膨脹室以降低噪音，如第6圖所示。 該旋臂3b有兩個引擎接口6在其被耦合至一引擎（未顯 示出）的前端以致於提供一.可懸掛的結構。該旋臂扑有一 後端被建構以致於能夠拉一鏈子環繞被連接至該引擎和該 後輪2的滑輪運行。 該旋臂3a、3b提供一空氣清潔功能和一消音功能且對 於後輪2提供一懸掛功能。該旋臂3a、孙有效地減少該後 部單位結構之零件的數量，製造和組合該後部單位結構的 成本’以及該摩托車的體積和重量。 根據本發明之另一具體實施例，具有一後部單位結構 的一摩托車將參照第7圖和第8圖描述如下，該摩托車有一 本紙張尺度適用中國國家標準（dv^)A4規格（210_·χ 297公釐）----- -9- 1 n ϋ n ϋ 1 1_ f: :n R i ft— ·1 —m n I^^· 1- a— ϋ tm§ A— 1 ϋ I (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作杜印製 509639 A7 一· ----------B7 丨 - 五、發明說明（、 空氣清潔器裝置和一消音器裝置被裝入至一後擋泥板。 如第7圖和第8圖所示，一速克達型的摩托車1有一引 擎（未顯示出）、一後擋泥板13和一後輪2，其等一起被耦 合至一單位，該單位的前部藉由一橡膠座墊元件連接至一 摩托車體，因此提供一後部座墊結構。 該後擋泥板13包括一對擋泥板元件13a、13b，其支標 後輪2的一水平軸4，如第8圖所示。 该左邊後擋泥板元件13a裝入一空氣清潔器裝置於其 内，且該右邊後擋泥板元件13b裝入一消音器裝置於其内。 該左邊後擋泥板13a由纖維補強的樹脂片製成，而該 右邊後擋泥板元件13b由鋼片製成。 在左邊後擋泥板元件13a中的空氣清潔器裝置包括一 樹脂的一分層薄片和長的玻璃纖維，該元件被預熱至一高 於樹脂熔點的溫度並藉由一模具被壓縮成形。該空氣清潔 器裝置有一凸出部向外伸出和一凹口向内打開。一包括一 樹脂的一分層薄片和一長的玻璃纖維之内部的蓋子14藉由 如兩頻率的焊接之類而連接至該凸出部的後邊，限定一進 氣室Μ於其内的中央區域。該進氣室M是大體上和第3圖 所示之進氣室Μ的結構相同。該左邊後擋泥板元件13&有 一被限疋在凸出部之内的窗h，且一漏斗（未顯示出）被容 置在該進氣室Μ内。 被裝入在違右邊後擋泥板元件13b的消音器包括一鋼 片的内罩15橫向地伸出至一輪子2&的内部空間以限定一氣 體管道和一膨脹室。該内罩15有周圍邊緣藉由鉚合之類來 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公餐） -----^ ----It---------f (請先閱讀背面之注意事項再填寫本頁) -10- 509639 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明（$ 連接至已被壓縮成形之鋼片的右邊後擋泥板元件1 3b後 邊。該内罩15之被連接的周圍邊緣藉由如密封膠般之類似 物密封。 该後擒泥板13不僅結構如一汽車擔泥板和一用於該後 輪的保護蓋，而且完成一空氣清潔功能和一消音功能。該 後擋泥板1 3能有效地減少該後部單位結構之零件數量、製 造和組合該後部單位結構的成本，和該摩托車的體積和重 量。 一空氣清潔器裝置和/或一消音器裝置可能被裝入在 該旋臂3a、3b之一或該後擋泥板元件13a、13b内。 該旋臂3a、3b和該後擋泥板元件13a、13b可能由任何 適宜的材料製成。 根據本發明，如上所述，因為該旋臂或該擂泥板裝入 一空氣清潔器裝置或一消音器裝置於其内，一元件能完成 多個功能，所以該後部單位結構之零件的數量可以被減 少’製造和組合該後部單位結構的成本可以被減少，且該 摩托車的體積和重量也可以被減少。 雖然本發明之特定較佳具體實施例已在本文中顯示及 描述’應該要了解的是在其中可在未偏離後附申請專利範 圍之範圍之下，進行不同的變化或改良。 元件標號對照表 1 摩托車 2 3a、3b旋臂 4 本紙張尺度適用中國國豕標準（CNS)A4規格（210 X 297公爱） 後輪 水平軸 I.--.----------- I i — — — — — in — — — ! (請先閱讀背面之注意事項再填寫本頁) -11 - 509639 A7 B7 五、發明說明（9) 經濟部智慧財產局員工消費合作社印製 5、6 被壓縮部分 6h 窗 7 空氣清潔蓋 8 漏斗 9 連接管 11、12 被壓縮部分 13 後擋泥板 13a 左邊後擋泥板元件 13b 右邊後擋泥板元件 14 内部的蓋子 15 内罩 50 後輪 51a 、 51b 旋臂 52 引擎 53 消音器 54 空氣清潔器 e 引擎接口 Μ 進氣室 ------ I--II--I ---I---—訂---— II-- (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（210 X 297公釐） -12-A7 A7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (3-A funnel 8 is housed in the air intake chamber M. The air intake chamber M is held and compressed by an internal part installed as The connection pipe 9 above the part 5 is connected. The air injected through the air inlet hole in the air cleaning cover 7 is filtered by the funnel 8 in the air inlet chamber M, and then supplied to an engine carburetor (not (Shown). The swivel arm 3a has two engine interfaces e at which it is coupled to the front end of an engine (not shown) so as to provide a suspension structure. The swivel arm 3 & Pull a chain around the pulley connected to the engine and the rear wheel 2. As shown in Fig. 4 to Fig. 6, the rotary arm 3a containing a muffler device is composed of two compressed steel plates. Part ^, I] has a wavy convex central web region where the edges are fused to each other. The bulged central web region of the compressed portions 11, 12 defines a wavy gas pipe, which includes Several expansion chambers to reduce noise, as shown in Figure 6 The swing arm 3b has two engine interfaces 6 at which it is coupled to the front end of an engine (not shown) so as to provide a suspendable structure. The swing arm flap has a rear end constructed so that it can be pulled around by a chain The pulleys connected to the engine and the rear wheel 2 operate. The swing arms 3a, 3b provide an air cleaning function and a muffler function and provide a suspension function for the rear wheel 2. The swing arm 3a, Sun effectively reduces the rear The number of parts of the unit structure, the cost of manufacturing and combining the rear unit structure, and the volume and weight of the motorcycle. According to another specific embodiment of the present invention, a motorcycle with a rear unit structure will refer to FIG. 7 And Figure 8 is described as follows. The motorcycle has a paper size applicable to the Chinese national standard (dv ^) A4 specification (210_ · χ 297 mm) ----- -9- 1 n ϋ n ϋ 1 1_ f:: n R i ft— · 1 —mn I ^^ · 1- a— ϋ tm§ A— 1 ϋ I (Please read the precautions on the back before filling this page) Intellectual Property Bureau, Ministry of Economic Affairs, Consumer Consumption Du Printed 509639 A7 I ---------- B7 丨-V. Description of the invention (, air A cleaner device and a muffler device are incorporated into a rear fender. As shown in FIGS. 7 and 8, a one-speed Keda motorcycle 1 has an engine (not shown) and a rear fender. The plate 13 and a rear wheel 2 are coupled together to a unit whose front is connected to a motorcycle body by a rubber seat cushion element, thus providing a rear seat cushion structure. The rear fender 13 It includes a pair of fender elements 13a, 13b, which support a horizontal axis 4 of the rear wheel 2, as shown in Figure 8. The left rear fender element 13a is housed in an air cleaner device, and The right rear fender element 13b is fitted with a muffler device therein. The left rear fender 13a is made of a fiber-reinforced resin sheet, and the right rear fender element 13b is made of a steel sheet. The air cleaner device in the left rear fender element 13a includes a layered sheet of resin and long glass fibers, the element is preheated to a temperature higher than the melting point of the resin and is compression-molded by a mold. The air cleaner unit has a projection protruding outward and a recess opening inward. A layered sheet including a resin and a long glass fiber inner cover 14 are connected to the rear of the projection by two-frequency welding or the like, defining an air inlet chamber M in the center thereof. region. This intake chamber M has substantially the same structure as the intake chamber M shown in FIG. The left rear fender element 13 & has a window h confined within the projection, and a funnel (not shown) is housed in the intake chamber M. The muffler incorporated in the rear right fender element 13b includes a steel sheet inner cover 15 which projects laterally to the inner space of a wheel 2 & to define a gas duct and an expansion chamber. The inner cover 15 has surrounding edges and is riveted or the like. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 meals) ----- ^ ---- It ------ --- f (Please read the precautions on the back before filling this page) -10- 509639 Printed by A7 B7, Consumer Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs V. Invention Description ($ Connected to the right side of the steel sheet that has been compression-molded The rear side of the rear fender element 1 3b. The connected peripheral edges of the inner cover 15 are sealed by a sealant-like or the like. The rear fender 13 is not only structured as an automobile mudguard and a rear wheel. The protective cover also completes an air cleaning function and a muffler function. The rear fender 13 can effectively reduce the number of parts of the rear unit structure, the cost of manufacturing and combining the rear unit structure, and the volume of the motorcycle And weight. An air cleaner device and / or a muffler device may be installed in one of the swing arms 3a, 3b or the rear fender element 13a, 13b. The swing arms 3a, 3b and the rear stop The tablet elements 13a, 13b may be made of any suitable material. According to the invention, as above It is stated that because the spiral arm or the mud board is incorporated into an air cleaner device or a muffler device, a component can perform multiple functions, so the number of parts of the rear unit structure can be reduced. The cost of combining the rear unit structure can be reduced, and the volume and weight of the motorcycle can also be reduced. Although certain preferred embodiments of the present invention have been shown and described herein, 'it should be understood that Different changes or improvements are made without departing from the scope of the attached patent application. Component reference table 1 Motorcycle 2 3a, 3b swing arm 4 This paper size applies to China National Standard (CNS) A4 (210 X 297 public love) horizontal axis of the rear wheel I .--.----------- I i — — — — — in — — —! (Please read the precautions on the back before filling this page)- 11-509639 A7 B7 V. Description of the invention (9) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5, 6 Compressed part 6h Window 7 Air cleaning cover 8 Funnel 9 Connection pipe 11, 12 Compressed part 13 Rear fender 13a Left back Plate element 13b Right rear fender element 14 Internal cover 15 Inner cover 50 Rear wheels 51a, 51b Swing arm 52 Engine 53 Muffler 54 Air cleaner e Engine connection M Intake chamber ------ I--II --I --- I ----- Order ---- II-- (Please read the notes on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) ) -12-