1302969 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種變速箱，特別是有關於一種可充 分潤滑變速齒輪的變速箱。 【先前技術】 在引擎變速箱裏設置有變速齒輪，用以改變引擎輸出 的扭力大小，以適合各種行駛狀況（快速、慢速、爬坡等）。 目前變速齒輪的潤滑方式，有利用供油通路以喷射方式向 _ 變速齒輪供油者，然而此種潤滑方式受限於喷射方向及喷 射範圍，使得傳動軸上變速齒輪無法充分潤滑。 【發明内容】 有鑑於此，本發明提供一種可充分潤滑變速齒輪的變 速箱以解決習知技術的缺點。 本發明之變速箱包括一變速箱體以及複數個變速齒 輪。變速箱體包括一儲油槽，用於容納機油。變速齒輪設 置在變速箱體内，變速齒輪的位置較儲油槽為低，當機油 Φ 由儲油槽溢流而出時，機油落至變速齒輪上。 儲油槽在變速齒輪的軸向上延伸而具有既定的長度尺 寸，使得溢流而下的機油係沿著變速齒輪的軸向分佈，因 而可以充分潤滑到變速齒輪，因此能解決習知技術受限於 喷射方向及喷射範圍而產生潤滑不充分的問題。 為使本發明之上述目的、特徵、和優點能更明顯易懂， 下文特舉較佳實施例並配合所附圖式做詳細說明。 【實施方式】 請同時參閱第1A圖以及第1B圖，第1A圖係依據本 0134-A21427TWF(N2)；94-TOP-29；itshen 1302969 發明之引擎汽缸體及變速箱體的立體分解圖，第1B圖係 從另一方向觀察引擎汽缸體及變速箱體的立體分解圖。變 速箱體20包括一右蓋21、一右殼體22、一左殼體23、以 及一左蓋（未圖示）。汽缸體10係安裝在變速箱體20的一 侧，並且與右殼體22及左殼體23所形成的腔體相連通， 而變速齒輪（第2圖中標號27、28所示者)設置在此腔體内。 如第1B圖所示，在右蓋21的左側面上設置有一第一 溝槽211以及一第一孔洞212，且第一溝槽211及第一孔 • 洞212相連通。 如第1A圖所示，在右殼體22的右側面上設置有一第 二溝槽221、一第二孔洞222、一第一流道223、以及一通 孔224,其中第二孔洞222、第一流道223及通孔224相連 通。須注意通孔224由右殼體22的右側面延伸至左侧面， 並與設置在左侧面上的儲油槽225相連通。在右殼體22 的左侧面上另外還設置一延伸部226，延伸部226的位置 較儲油槽225為低。 • 變速箱體20在組合後，右蓋21上的第一溝槽211及 第一孔洞212位置正對著右殼體21上的第二溝槽221及第 二孔洞222，而第一溝槽211及第二溝槽221組成一第二 流道。 在操作時，機油幫浦（未圖示）將機油送至第二流道 211、221，然後經由第一孔洞212、第二孔洞222進入第 一流道223，再經由通孔224而流入儲油槽225内。當儲 油槽225儲滿機油後，如第2圖所示，機油將溢出儲油槽 0134-A21427TWF(N2)；94-TOP-29；itshen 1302969 225,然後順著延伸部226的引導，流至下方的變速齒輪 27、28，並且加以潤滑。 本發明之儲油槽225在變速齒輪27、28的軸向（或者 垂直紙面的方向）上延伸而具有既定的長度尺寸，使得溢流 而下的機油係沿著變速齒輪27，28的軸向分佈，因而可以 充分潤滑到變速齒輪27、28,甚至可以將變速鼓及撥桿（未 圖示）也一併加以潤滑。此外，機油在機油幫浦（未圖示）的 壓力下由通孔224喷出，不會直接潤滑變速齒輪27、28， 鲁而是先進入儲油槽225，儲油槽225具有調節功能，將使 得溢流的機油量更為均句且穩定，因此能解決習知技術受 限於噴射方向及喷射範圍而產生潤滑不充分的問題。 在本實施例中，延伸部226為板片狀，延伸部226在 變速齒輪27、28的軸向（或者垂直紙面的方向）上的長度與 儲油槽225相同，用於承接溢流的機油，並引導機油向下 流至變速齒輪27、28。 雖然本發明已以較佳實施例揭露如上，然其並非用以限定 籲 本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍 内’當可作任意之更動與潤飾，因此本發明之保護範圍當視後 附之申請專利範圍所界定者為準。 0134-A21427TWF(N2)；94-TOP-29；itshen 7 1302969 【圖式簡單說明】 第1A圖係依據本發明之引擎汽缸體及變速箱體的立 體分解圖； 第1B圖係從另一方向觀察本發明之引擎汽缸體及變 速箱體的立體分解圖； 第2圖顯示本發明之變速齒輪的潤滑情形。 【主要元件符號說明】 10〜汽缸體 _ 20〜變速箱體 21〜右蓋 22〜右殼體 23〜左殼體 27〜變速齒輪 28〜變速齒輪 211〜第一溝槽 212〜第一孔洞 • 221〜第二溝槽 222〜第二孔洞 223〜第一流道 224〜通孔 225〜儲油槽 226〜延伸部 0134-八2142丌\^(似);94-丁〇卩-29;扣卜6111302969 IX. Description of the Invention: The present invention relates to a gearbox, and more particularly to a gearbox for fully lubricating a shifting gear. [Prior Art] A gear shifting gear is provided in the engine gearbox to change the torque of the engine output to suit various driving conditions (fast, slow, hill climbing, etc.). At present, the lubrication mode of the shifting gear is provided by the oil supply passage to the _ shifting gear by the injection method. However, this lubrication method is limited by the injection direction and the injection range, so that the shifting gear on the transmission shaft cannot be sufficiently lubricated. SUMMARY OF THE INVENTION In view of the above, the present invention provides a transmission case that can sufficiently lubricate a shifting gear to solve the disadvantages of the prior art. The gearbox of the present invention includes a gearbox body and a plurality of shifting gears. The gearbox body includes an oil reservoir for containing oil. The shifting gear is disposed in the transmission body, and the position of the shifting gear is lower than that of the oil reservoir. When the oil Φ overflows from the oil reservoir, the oil falls onto the shifting gear. The oil storage tank extends in the axial direction of the shift gear and has a predetermined length dimension, so that the oil flowing down is distributed along the axial direction of the shift gear, and thus can be sufficiently lubricated to the shift gear, so that the conventional technology can be solved by The injection direction and the injection range cause a problem of insufficient lubrication. The above described objects, features, and advantages of the present invention will be more apparent from the description of the preferred embodiments. [Embodiment] Please refer to FIG. 1A and FIG. 1B at the same time. FIG. 1A is an exploded perspective view of the engine block and the transmission body according to the invention of the present invention, which is in accordance with the present invention, which is based on the present invention. Fig. 1B is an exploded perspective view of the engine block and the transmission case viewed from the other direction. The speed change box 20 includes a right cover 21, a right housing 22, a left housing 23, and a left cover (not shown). The cylinder block 10 is mounted on one side of the transmission case 20 and communicates with a cavity formed by the right casing 22 and the left casing 23, and the shift gear (shown by reference numerals 27 and 28 in Fig. 2) is disposed. In this cavity. As shown in FIG. 1B, a first trench 211 and a first via 212 are disposed on the left side surface of the right cover 21, and the first trench 211 and the first hole 212 are in communication. As shown in FIG. 1A, a second groove 221, a second hole 222, a first flow path 223, and a through hole 224 are disposed on the right side surface of the right casing 22, wherein the second hole 222 and the first flow path are provided. 223 and the through hole 224 are in communication. It should be noted that the through hole 224 extends from the right side surface of the right housing 22 to the left side surface and communicates with the oil reservoir 225 provided on the left side surface. An extension portion 226 is further disposed on the left side surface of the right casing 22, and the extension portion 226 is positioned lower than the oil reservoir 225. After the transmission body 20 is assembled, the first groove 211 and the first hole 212 on the right cover 21 are positioned opposite to the second groove 221 and the second hole 222 on the right casing 21, and the first groove The second groove 221 and the second groove 221 form a second flow path. During operation, the oil pump (not shown) sends the oil to the second flow passages 211, 221, and then enters the first flow passage 223 through the first hole 212 and the second hole 222, and then flows into the oil storage tank through the through hole 224. Within 225. When the oil storage tank 225 is full of oil, as shown in Fig. 2, the oil will overflow the oil storage tank 0134-A21427TWF (N2); 94-TOP-29; itshen 1302969 225, and then follow the extension 226 to flow to the lower The shifting gears 27, 28 are lubricated. The oil reservoir 225 of the present invention extends in the axial direction (or the direction perpendicular to the paper surface) of the shift gears 27, 28 to have a predetermined length dimension such that the oil flowing down is distributed along the axial direction of the shift gears 27, 28. Therefore, the shift gears 27, 28 can be sufficiently lubricated, and even the shift drum and the lever (not shown) can be lubricated together. In addition, the oil is ejected from the through hole 224 under the pressure of the oil pump (not shown), and does not directly lubricate the shift gears 27, 28, but instead enters the oil storage tank 225 first, and the oil storage tank 225 has an adjustment function, which will make The amount of oil that overflows is more uniform and stable, so that the problem that the conventional technique is limited by the injection direction and the injection range and the lubrication is insufficient is solved. In the present embodiment, the extending portion 226 is in the form of a plate, and the extending portion 226 has the same length in the axial direction (or the direction perpendicular to the paper surface) of the shifting gears 27, 28 as the oil reservoir 225, and is used for receiving the overflowing oil. The oil is then directed downward to the shifting gears 27, 28. While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and it is to be understood that the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. 0134-A21427TWF(N2);94-TOP-29;itshen 7 1302969 [Simplified Schematic] FIG. 1A is an exploded perspective view of the engine block and the transmission case according to the present invention; FIG. 1B is from the other direction An exploded perspective view of the engine block and the transmission case of the present invention is observed; Fig. 2 shows the lubrication of the shift gear of the present invention. [Description of main component symbols] 10 to cylinder block _ 20 to gearbox 21 to right cover 22 to right casing 23 to left casing 27 to shifting gear 28 to shifting gear 211 to first groove 212 to first hole 221~2nd trench 222~2nd hole 223~1st flow channel 224~through hole 225~ oil storage tank 226~ extension part 0134-eight 2142丌\^(like); 94-丁〇卩-29; buckle 611