M333469 八、新型說明： 【新型所屬之技術領域】 本創作涉及一種設於内燃引擎之消音器内的觸媒筒 體，特別是一種可限制筒體内之觸媒蕊板往廢氣導入^排 放方向滑動的裝置技術。 【先前技術】 為了迎合愈趨嚴格的廢氣排放標準，坊間業者皆合在 ，汽、機車或割草機等設有内燃引擎的廢氣排放通路^二置 • 金屬筒體，以内設用來披覆觸媒之金屬蕊板；該觸媒通常 含有Pd、Pt、Rh等貴金屬，據以淨化引擎廢氣，進而^輕 廢氣對外界空氣品質的影響。 / 且知，該金屬蕊板通常是由一平板式及波形式怒板相 互焊接結合並捲繞成渦捲狀，以植入於筒體内，再與筒體 之間焊結固定成一體，以便於筒體内形成可導引廢氣之複 數通孔。 & 然而，上述在蕊板之間及蕊板與筒體之間採用焊接固 籲定的方式並不利於降低其產製成本。為克服此問題 公告第38657!號專利已揭露有—種可將蕊板定位於筒 的技術，包括在容納有蕊板的筒體雙端各自設置若干固〜 =，並於各Μ孔之間設置固定架，以止播蕊板因高溫， 震動或廢氣吹襲而滑出筒豸，並防止蕊板上披覆之觸媒 ^察或碰撞而掉^。惟其問題在於必須另設蚊孔及固定 架丄已徒增加工程序，且當筒體欲設置於廢氣排放通路$ 消音器内時，亦需經由焊接方式將筒體固定於消音器内之 隔板上，仍有徒增加工程序而致耗費成本的問題，亟需力口 M333469 以改善。 【新型内容】 本創作之目的旨在提供一種設於消音器内以止擋觸媒 蕊板滑移的定位裝置，讓蕊板可不需固定的擺放於筒體 内。為達此目的，本創作包含： 一消音器，連接於一内燃引擎之一廢氣排放通路上， 器殼内設至少一隔板，將消音器内部間隔形成複數相連通 且足以導引廢氣排放的膨脹室； 一觸媒筒體，一體形成於隔板上，且筒體上具連通於 至少二膨脹室之間的一進氣端及一排氣端，進、排氣端之 間的筒體内設至少一披覆有觸媒的蕊板，且筒體具至少一 足以限制蕊板往排氣端方向滑動的擋部；及 一可限制蕊板往進氣端方向滑動的推抵部，設於進氣 端與消音器之一内壁面或進氣端與隔板之間。 除此之外，本創作也包含： 所述檔部為一體形成於筒體排氣端上之交叉狀、弧曲 狀或歧片狀的檔桿。 所述擋部呈現凹凸或波浪狀形體，而具備至少一足以 貼觸及制動蕊板滑動的凹部，及至少一足以和凹部間隔形 成一通氣孔的凸部。 所述設於進氣端與消音器之内壁面間的推抵部，係為 一焊設於進氣端與内壁面間之止擋片或一局部形成於内壁 面上且推抵進氣端的凸丘。 所述設於進氣端與隔板之間的推抵部，係為一焊設於 M333469 進氣端與隔板之間的止擋片。 所述擋部亦可形成於隔板上，且筒體亦可以結合方式 設置於隔板上。M333469 VIII. New description: [New technical field] The present invention relates to a catalyst cylinder provided in a silencer of an internal combustion engine, in particular, a method for restricting the introduction of the catalyst medium in the cylinder to the exhaust gas Sliding device technology. [Prior Art] In order to meet the increasingly stringent emission standards, the workshops are all in place. The exhaust gas exhaust passages of internal combustion engines, such as steam, locomotives or lawn mowers, are equipped with metal cylinders. The metal plate of the catalyst; the catalyst usually contains precious metals such as Pd, Pt, Rh, etc., in order to purify the exhaust gas of the engine, and then the effect of the light exhaust gas on the external air quality. / It is known that the metal plate is usually welded and combined with a flat plate and a wave-shaped anger plate and wound into a spiral shape to be implanted in the cylinder body, and then welded and fixed integrally with the cylinder body. In order to form a plurality of through holes in the cylinder that can guide the exhaust gas. & However, the above-mentioned method of welding between the core plates and the core plate and the cylinder body is not advantageous for reducing the cost of production. In order to overcome this problem, the patent No. 38657! has disclosed a technique for positioning a core plate in a cylinder, comprising setting a plurality of solids at each of the ends of the cylinder containing the core plate, and between the respective bores. Set the fixing frame to stop the bobbin plate from slipping out of the barrel due to high temperature, vibration or exhaust gas, and prevent the catalyst on the plate from being rubbed or collided. However, the problem is that it is necessary to set up a mosquito hole and a fixing frame. When the cylinder is to be placed in the exhaust gas passage muffler, it is also necessary to fix the cylinder to the partition in the muffler by welding. In addition, there is still the problem of increasing the cost of the work and the cost of the work, and it is urgent to improve the M333469. [New content] The purpose of this creation is to provide a positioning device that is arranged in the silencer to stop the sliding of the catalyst plate, so that the plate can be placed in the cylinder without being fixed. In order to achieve this goal, the present invention comprises: a muffler connected to an exhaust gas discharge path of an internal combustion engine, at least one partition plate in the casing, which forms a plurality of internal passages of the muffler and is sufficient to guide exhaust gas discharge An expansion chamber; a catalyst cylinder integrally formed on the partition, and the cylinder has an inlet end and an exhaust end connected between the at least two expansion chambers, and a cylinder between the inlet and the exhaust end Having at least one core plate coated with a catalyst, and the cylinder body has at least one blocking portion for restricting sliding of the core plate toward the exhaust end; and a pushing portion for restricting sliding of the core plate toward the intake end, It is disposed between the inlet end and an inner wall surface of the muffler or between the inlet end and the partition. In addition, the present invention also includes: the gear portion is a cross-shaped, arc-shaped or blade-shaped shift lever integrally formed on the exhaust end of the cylinder. The blocking portion has a concave or convex or wavy shape, and has at least one concave portion sufficient for sliding contact with the brake plate, and at least one convex portion sufficient to form a vent hole spaced apart from the concave portion. The pushing portion disposed between the air inlet end and the inner wall surface of the muffler is a stop piece welded between the air inlet end and the inner wall surface or partially formed on the inner wall surface and pushed against the air inlet end. Concave. The pushing portion disposed between the air inlet end and the partition plate is a stop piece welded between the air inlet end of the M333469 and the partition plate. The blocking portion may also be formed on the partition, and the cylindrical body may also be disposed on the partition in a combined manner.
依據上述，能簡化將蕊板定位於金屬筒體内之加工的 複雜度，且提升蕊板設置於筒體内的穩固性及耐久使用壽 =，亚將容置蕊板之筒體一體形成於消音器内，以簡化將 同體没置於消音器内之加卫程序，進而提升觸媒蕊板及筒 體之組裂及配置於消音器内的效率。 然，，為能再加詳述本創作，併予列舉出較佳實施例， 請配合芩照圖式而詳細說明如後述·· 【實施方式】 ‘ 杯閱圖1所示，揭示出本創作第一款實施例之剖示 本創作之觸媒蕊板之改良式定位裝置的必要結構 技術，包含： 路10 i肖曰二1接於機車之一内燃引擎的一廢氣排放通 將消立哭板2(配合圖2及圖6所示）， 第-室足以—導引廢，排放的- 氣排放通路10之一排氣管13盥文弟一膨脹室11經由廢 經由消音器1上之一尾管14與^弓丨擎相通，第二膨脹室12 一觸媒筒體3, 一體形成於卩5界大氣相通； 有連通於第一與第二膨脹室丨丨、阳板2上，且筒體3上形成 排氣端32，進、排氣端31、32 之間的一進氣端31及一 披覆有觸媒的蕊板4,在本實施$間的筒體3内設有至少一 板4、41為例（如圖2及圖3戶_ ^被數披覆有觸媒的滅 不）’說明本實施例係使用 M333469 -平板式蕊板4及-波形式蕊板41椿j；：·狀蕊板 40，且蕊板4及41之間卷繞形成 < 導引廢氣的複數通孔 42，各通孔42連通於筒體3的進、排氣端3卜32之間； 同時，筒體3上形成至少一足W艮制蕊板4〇往排氣端32 方向滑動的撞部5，且擋部5上形成有至少――連通各通孔 42與第二膨脹室12的排氣口 51 (如圖6所不），及According to the above, the processing complexity of positioning the core plate in the metal cylinder body can be simplified, and the stability and durability of the core plate disposed in the cylinder body can be improved. In the silencer, the edging program for simplifying the same body without being placed in the muffler is simplified, thereby improving the efficiency of the cracking of the catalyst plate and the cylinder and the arrangement in the muffler. In order to explain the present invention in detail, a preferred embodiment will be described in detail with reference to the drawings. [Embodiment] The cup is shown in Figure 1, revealing the creation. The first embodiment illustrates the necessary structural technology of the improved positioning device of the catalyst plate of the present invention, including: Road 10 i Xiaoyi 2 is connected to an exhaust gas of an internal combustion engine of the locomotive. Plate 2 (shown in Figures 2 and 6), the first chamber is sufficient to guide the waste, one of the exhaust gas discharge passages 10 is exhausted, and the expansion chamber 11 is passed through the muffler 1 a tail pipe 14 is connected to the 丨 丨 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , An exhaust end 32 is formed on the cylinder 3, an intake end 31 between the inlet and exhaust ends 31, 32 and a core plate 4 coated with a catalyst are disposed in the cylinder 3 of the present embodiment. There are at least one board 4, 41 as an example (as shown in Fig. 2 and Fig. 3, the number of households is overlaid with a catalyst). This embodiment uses M333469 - flat type core board 4 and - waveform The core plate 41椿j:: the shape plate 40, and the core plates 4 and 41 are wound to form a plurality of through holes 42 for guiding the exhaust gas, and the through holes 42 communicate with the inlet and exhaust ends of the barrel 3. At the same time, at least one of the legs 3 is formed on the cylinder 3, and the striker 5 is slid toward the exhaust end 32, and at least the through hole 42 is formed on the stop 5 An exhaust port 51 of the second expansion chamber 12 (not shown in FIG. 6), and
一可限制蕊板40往進氣端3!方向滑動的推抵部6(如 圖1、圖2及圖6所示），設於進氣端31與1^板2之間。 在更加具體的實施上，本創作也包含·· 所述觸媒係為鈀(Pd)、鉑(pt)、铑(Rh)等貴金屬元素。 所述擔部5為一體形成於筒體3排氣端义或 之交又狀、弧曲狀或歧片狀的擋椁 及圖5戶斤示)。 ㈠2 (如圖2、圖3、圖4 所述設於進氣端31與隔板2之 焊設於進氣端31與隔板2之間的^==6,係為一 藉由上述構件之組成，可供據以杂* 61。 在引擎啟動運轉後，引擎所產生的=^本創作’特別是 路10之排氣管13導入消音器χ的'::經由廢氣排放通 i所斧），並通過止擋片61而經由筒脹室11内（如圖 蕊板40的複數通孔42 (如圖6所示），^進氣端31導入 氣口 51及筒體3的排氣端32導入第_ 、、'里由擋部5之排 經由尾管14排放至外界大氣·，在此^"脹室12内，隨後 數通孔42軸蕊板4、41上，媒i行通過複 作，藉以淨化廢氣；同時，廢氣會吹丁礼化及逛原的運 排氣端W方向滑動，致使蕊板40接4〇往筒體3之 人检4 5之擋桿52的 M333469 止推’並藉由止擋片61止擋蕊板40於筒體3的進氣端31 以制動蕊板40於筒體3内；藉以限制蕊板4〇因高溫、 展動或廢氣吹襄而滑出甸體3 ’能防止蕊板40上披覆之觸 媒因磨擦或碰撞而掉落，進而提升蕊板40設置於筒體3内 的％固性，以進一步提升蕊板40之耐久使用壽命。依據上 述’能讓觸媒蕊板40不需固定的擺放於筒體3内，可簡化 將觸媒蕊板40定位於金屬筒體3内之加工的複雜度，並可 將各置蕊板40之筒體3 —體形成於消音器1内的隔板2 上’以簡化將筒體3設置於消音器1内之加工程序，進而 提升觸媒蕊板40及筒體3之組裝及配置於消音器1内的效 以降低其產製成本。 此外，上述擋部5之擋桿52亦可形成呈現凹凸或波浪 狀的形體（如圖7所示），而具備至少一足以貼觸及制動蕊 板4〇滑動的凹部53，及至少一足以和凹部53間隔形成一 通氣孔55的凸部54，在本實施上舉以複數凹部53及凸部 54為例，說明複數凹部53及凸部54間隔形成複數通氣孔 55 ’且蕊板40之通孔42與通氣孔55相連通；據此，通過 複數通孔42之廢氣亦能經由複數通氣孔55導入第二膨脹 至12内，進而提升蕊板40導引廢氣之順暢性。 另外，所述筒體3係在隔板2上進行冲壓而成，或將 隔板2與筒體3 —體製造成形，且筒體3内亦能設置使用 一平板式蕊板4捲繞成之渦捲狀蕊板。 請參閱圖8所示，揭示出本創作第二款實施例之立體 分解圖，說明於割草機之一内燃引擎的一廢氣排放通路l〇a 上連接一消音器la (如圖9所示）；該消音器ia係由一上 9 M333469 蓋16a及一下蓋15a組合而成，且消音器la内設至少一隔 板2a，將消音器la内部間隔形成相連通且足以導引廢氣排 放的一下層膨脹室lla及一上層膨脹室12a，並於隔板2a 上形成至少一擋部5a，並在隔板2a上設一觸媒筒體，具 連通於下層與上層膨脹室Ha、12&之間的一進氣端31&及 ，一排氣端32a，進、排氣端31a、32a之間的筒體3a内設至 少一彼覆有觸媒的蕊板4，在本實施上同樣舉以上述使用平 板式蕊板4及波形式蕊板41捲繞成之渦捲狀蕊板4〇為例 •(配合圖2及圖10所示）；同時，該擋部5a亦足以限制蕊 板40往排氣端32a方向滑動，且進氣端31a與消音器la 之一内壁面19a之間設一可限制蕊板4〇往進氣端3U方向 滑動的推抵部6a。 上述下層膨脹室lla藉由下蓋15a底部之一入氣口 17& 銜接廢氣排放通路l〇a而與引擎相通（如圖8及圖9所示）， ^層膨脹室12a藉由上蓋16a頂部之一出氣口 18a與外界大 氣相通；上述蕊板40之複數通孔42亦連通於筒體％的進、 排氣端31a、32a之間（如圖1〇所示）；上述擋部5a上亦形 成有至少一連通各通孔42與上層膨脹室12a的排氣口 51a，且撞部5a亦為一體形成於筒體3a排氣端仏或隔板 2a上之交叉狀、弧曲狀或歧片狀的擋桿52& (配合圖3、 4及圖5所示），同時設於進氣端3la與消音器之内 19a間的推抵部6a，係為一焊設於進氣端3u盥内壁面1 間之弧曲狀止擋片61a，其餘構件組成係等同於上 實施例。 ^ 藉由上述’在引擎啟動運轉後，引擎所產生之廢氣會 M333469 經由廢氣排放通$A pushing portion 6 (shown in Figs. 1, 2, and 6) that restricts the sliding of the core plate 40 toward the intake end 3! direction is provided between the intake end 31 and the plate 2. In a more specific implementation, the present invention also includes that the catalyst is a noble metal element such as palladium (Pd), platinum (pt) or rhodium (Rh). The shoulder portion 5 is integrally formed on the exhaust end of the tubular body 3, or in the shape of a cross, a curved or a lobed shape, and the damper of Fig. 5 is shown. (1) 2 (as shown in FIG. 2, FIG. 3, FIG. 4, the welding between the inlet end 31 and the partition 2 is set between the inlet end 31 and the partition 2, and the number is ^==6, which is The composition can be used according to the miscellaneous * 61. After the engine is started, the engine produces the =^ this creation 'especially the exhaust pipe 13 of the road 10 is introduced into the muffler χ':: through the exhaust pipe And passing through the stopper piece 61 through the inside of the inflation chamber 11 (such as the plurality of through holes 42 of the plate 40 (as shown in FIG. 6), the intake end 31 is introduced into the air port 51 and the exhaust end of the cylinder 3 32 is introduced into the _, ', and is discharged from the row of the blocking portion 5 through the tail pipe 14 to the outside atmosphere, and in this ^" expansion chamber 12, then the number of through holes 42 on the core plate 4, 41, medium i Through the re-production, the exhaust gas is purified; at the same time, the exhaust gas will be blown and slid in the W direction of the original exhaust and exhaust end, so that the core plate 40 is connected to the M333469 of the block 52 of the human body of the cylinder 3 Stopping and stopping the core plate 40 at the intake end 31 of the cylinder 3 by the stop piece 61 to brake the core plate 40 in the cylinder 3; thereby limiting the core plate 4 due to high temperature, spreading or exhausting And sliding out of the body 3 'can prevent the core 40 from covering The catalyst drops due to friction or collision, thereby improving the % solidity of the core plate 40 disposed in the cylinder 3 to further enhance the durable service life of the core plate 40. According to the above, the catalyst plate 40 can be fixed without fixing. The arrangement of the cylinders 3 in the cylinder 3 simplifies the processing of positioning the catalyst plates 40 in the metal cylinder 3, and the cylinders of the respective core plates 40 are formed in the silencer 1 . The upper part of the partition 2 is simplified to simplify the process of assembling the cylindrical body 3 and the cylindrical body 3 in the muffler 1 to reduce the cost of production. In addition, the blocking lever 52 of the blocking portion 5 may also form a concave or convex shape (as shown in FIG. 7), and at least one concave portion 53 sufficient for the sliding contact with the brake plate 4, and at least one sufficient The convex portion 54 of the vent hole 55 is formed at a distance from the concave portion 53. In the present embodiment, the plurality of concave portions 53 and the convex portion 54 are taken as an example to illustrate that the plurality of concave portions 53 and the convex portion 54 are spaced apart to form a plurality of vent holes 55' and the core plate 40 is opened. The hole 42 is in communication with the vent hole 55; accordingly, the exhaust gas passing through the plurality of through holes 42 can also pass through The number of vents 55 is introduced into the second expansion to 12, thereby improving the smoothness of the exhaust gas guided by the core plate 40. In addition, the cylinder 3 is stamped on the partition 2, or the partition 2 and the cylinder 3, the body is formed, and the cylindrical body 3 can also be provided with a scroll-shaped core plate wound by a flat plate 4. Referring to FIG. 8, the stereoscopic decomposition of the second embodiment of the present invention is disclosed. The figure shows that a muffler la (shown in FIG. 9) is connected to an exhaust gas discharge passage 10a of the internal combustion engine of one of the lawn mowers; the muffler ia is composed of an upper 9 M333469 cover 16a and a lower cover 15a. And the muffler 1a is provided with at least one partition 2a, and the inner portion of the muffler 1a is formed to be connected to the lower layer expansion chamber 11a and the upper layer expansion chamber 12a which are sufficient to guide the exhaust gas discharge, and is formed on the partition plate 2a. At least one stop portion 5a, and a catalyst cylinder body disposed on the partition plate 2a, having an intake end 31& and an exhaust end 32a connected between the lower layer and the upper expansion chambers Ha, 12& At least one of the core plates 4 covered with the catalyst is disposed in the cylinder 3a between the exhaust ends 31a and 32a. The above-mentioned scroll-shaped core plate 4 and the corrugated core plate 41 are wound into a scroll-shaped core plate 4 as an example (in conjunction with FIGS. 2 and 10); at the same time, the blocking portion 5a is also sufficient to limit the core plate 40. The sliding portion 32a is slid in the direction of the exhaust end 32a, and a pushing portion 6a for restricting the sliding of the core plate 4 toward the intake end 3U is provided between the intake end 31a and the inner wall surface 19a of the muffler la. The lower expansion chamber 11a communicates with the engine through an air inlet 17& connecting the exhaust gas discharge passage 10a (as shown in Figs. 8 and 9), and the layer expansion chamber 12a is supported by the top of the upper cover 16a. An air outlet 18a is open to the atmosphere; the plurality of through holes 42 of the core plate 40 are also communicated between the inlet and exhaust ends 31a, 32a of the cylinder body (as shown in FIG. 1A); The exhaust port 51a is formed with at least one of the through holes 42 and the upper expansion chamber 12a, and the collision portion 5a is also integrally formed on the exhaust end 仏 or the partition 2a of the cylindrical body 3a, and is curved, curved or dissimilar. a sheet-shaped stopper 52& (shown in Figs. 3, 4 and 5), and a pushing portion 6a provided between the intake end 31a and the inside of the silencer 19a, is welded to the intake end 3u The arc-shaped stopper piece 61a between the inner wall faces 1 and the remaining member components are equivalent to the above embodiment. ^ By the above mentioned, after the engine is started, the exhaust gas generated by the engine will pass through the exhaust gas.
l〇a及入氣口 17a導入消音器ia的下層 ，並通過止擋片61a而經由筒 體之進氣3la導入蕊板4〇的複數通孔42 (如圖所 不），再經由擋部5&之排氣口 51a及筒體3a的排氣端32a ，入上層膨脹室12a内，隨後經由出氣口 18a排放至外界大 氣，期間:廢氣可於通過複數通孔42時與蕊板4、41上的 ，媒進仃氧化及還原的運作；同時，廢氣會吹襲蕊板4〇往 筒體3a之排氣端32a方向滑動，致使蕊板40接受擋部5a 春之擋柃52a的止擋，並藉由止擋片61a推抵筒體3a之進氣 端31a及蕊板40底部，以制動蕊板4〇於筒體3a内，其餘 實施方式係等同於上述第一款實施例。 再者，上述設於進氣端31a與消音器la之内壁面19a 間的推抵部6a，亦可為一局部形成於内壁面19a上且推抵 進氣端31a的凸丘62a (如圖11所示），其餘構件組成及實 施方式係等同於上述第二款實施例。 然而，以上僅為本創作之較佳實施例而已，並非用以 鲁·限定本創作之申請專利範圍，凡其他未脫離本創作所揭示 之精神下而完成的等效修飾或置換，均應包含於後述之申 清專利範圍内。 【圖式簡單說明】 圖1 ·揭示本創作第一款實施例之剖示圖。 圖2 :揭示本創作第一款實施例之立體分解圖。 圖3 :揭示本創作第一款實施例之筒體的前視圖。 圖4 :揭示本創作第一款實施例之筒體的另一前視圖。 11 M333469 圖5 :揭示本創作第一款實施例之筒體的再一前視圖。 圖6 :揭示本創作第一款實施例之筒體的剖示圖。 圖7:揭示本創作第一款實施例之另一筒體的剖示圖。 圖8 :揭示本創作第二款實施例之立體分解圖。 圖9 :揭示本創作第二款實施例之剖示圖。 圖10:揭不圖9之局部放大圖。 圖11 :揭示本創作第二款實施例之另一剖示圖。 【主要元件符號說明】 1、 1 a -------消音器 10、10a -------廢氣排放通路 11 —--第一膨脹室 11a -------下層膨脹室 12 -------第二膨脹室 12a —--上層膨脹室 13 -------排氣管 14 -------尾管 15a ……一下蓋 16a -------上蓋 17a -------入氣口 18a -------出氣口 19a -------内壁面 2、 2a -......隔板 3、 3a -------筒體 31、31a .......進氣端 12 M333469 32、32a 排氣端 4、 4〇、41 -------蕊板 42 -------通孔 5、 5a -------擋部 51、 51a -排氣口 52、 52a -------擋桿 ， 53 -------凹部 54 —……凸部 φ 55 -------通氣孔 6、 6a -------推抵部 61、61a 止擂片 62a ....... 凸丘L〇a and the air inlet 17a are introduced into the lower layer of the muffler ia, and are introduced into the plurality of through holes 42 of the core plate 4 through the intake air 3la of the cylinder through the stopper piece 61a (as shown in the figure), and then through the stopper 5& The exhaust port 51a and the exhaust end 32a of the cylinder 3a are introduced into the upper expansion chamber 12a, and then discharged to the outside atmosphere via the air outlet 18a, during which the exhaust gas can pass through the plurality of through holes 42 and the core plates 4, 41 On the upper side, the operation of the medium is oxidized and reduced; at the same time, the exhaust gas will blow the core plate 4 to slide toward the exhaust end 32a of the cylinder 3a, so that the core plate 40 receives the stop of the spring block 52a of the blocking portion 5a. And the stopper piece 61a is pushed against the intake end 31a of the cylinder 3a and the bottom of the core plate 40, so that the brake plate 4 is placed in the cylindrical body 3a, and the other embodiments are equivalent to the above-mentioned first embodiment. Further, the pushing portion 6a provided between the intake end 31a and the inner wall surface 19a of the muffler 1a may be a humps 62a partially formed on the inner wall surface 19a and pushing against the intake end 31a (as shown in the figure). 11)), the remaining component composition and implementation are equivalent to the second embodiment above. However, the above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the patent application, and all other equivalent modifications or substitutions that have been made without departing from the spirit of the present invention should include It is within the scope of the Shenqing patent described later. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing the first embodiment of the present creation. Fig. 2 is a perspective exploded view showing the first embodiment of the present creation. Fig. 3 is a front elevational view showing the barrel of the first embodiment of the present invention. Figure 4: Another front view showing the barrel of the first embodiment of the present invention. 11 M333469 Figure 5: A further front view showing the barrel of the first embodiment of the present invention. Figure 6 is a cross-sectional view showing the barrel of the first embodiment of the present invention. Figure 7: is a cross-sectional view showing another cylinder of the first embodiment of the present creation. Figure 8 is a perspective exploded view showing the second embodiment of the present creation. Figure 9 is a cross-sectional view showing a second embodiment of the present creation. Figure 10: A partial enlarged view of Figure 9. Figure 11 is another cross-sectional view showing the second embodiment of the present creation. [Main component symbol description] 1, 1 a ------- muffler 10, 10a ------- exhaust gas discharge passage 11 --- first expansion chamber 11a ------- lower layer expansion Room 12 ------- second expansion chamber 12a - upper expansion chamber 13 ------- exhaust pipe 14 ------- tail pipe 15a ... next cover 16a --- ----Upper cover 17a ------- Air inlet 18a ------- Air outlet 19a ------- Inner wall surface 2, 2a - ... Partition 3, 3a -------Tube 31, 31a ....... Intake end 12 M333469 32, 32a Exhaust end 4, 4〇, 41 ------- Core plate 42 ---- ---through hole 5, 5a ------- block 51, 51a - exhaust port 52, 52a ------- bar, 53 ------- recess 54 -... The convex portion φ 55 ------- the vent hole 6, 6a ------- the pushing portion 61, 61a the gusset 62a ....
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