1374094 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種後搖臂裝置，特別是指一種機車 的後搖臂裝置。 【先前技術】 參閱圖1，現有搖臂支承構造丨是樞設在一機車1〇〇上 ，該機車100包括一個傳動箱101、一樞轉地穿設於該傳動 箱101的輸出軸丨02、一設置於該輸出軸上1〇2的帶動單元 103、一與該傳動箱1〇1相間隔樞設於該搖臂支承構造^上 的後輪軸104、一設置於該後輪軸1〇4上的後輪1〇9，及能 一驅動該輸出軸102轉動的引擎（圖未示），該帶動單元 103包括一設置於該輸出轴1〇2上且位於該搖臂支承構造1 之外側的主動鏈輪106、一設置於該後輪軸1〇4上的被動鏈 輪107，及一繞覆於該主動鏈輪1〇6與被動鏈輪上的鏈條 1〇8利用s又置於輸出轴1〇2上的主動鏈輪1〇6與鍵條⑽ ，將引擎動力傳遞至被動鏈輪1〇7上以驅動該後輪1〇9轉 動。 而該搖煮支承構造1包括一與該輸出轴102同軸設置 於該傳動箱101上且呈筒狀的第一柩支轴U、一框設於該 第枢支軸11上的後搖臂12、一與該第一樞支軸u相反 地穿設該後搖臂12的第二樞支軸13、-設置於該後搖臂 12中且樞設於該第一樞支軸11上的滾柱軸承丨4,及二交疊 設置於該後榣# 12巾並減於該第二樞支軸13上的滚珠 轴承15，該輸出軸102是穿設於該第一樞支轴u ^ 3 1374094 其中’該後搖臂π具有分別位於該傳動箱ι〇1相反兩 側的一第一支承部121，及一第二支承部122，其中，該第 一支承部121具有一個設置有該滾柱軸承14,且可相對該 第一極支軸11枢擺的第一結合段123、一供該後輪轴1〇4 之一端植設的第一樞設段124,及一連接該第一結合段123 與該第一樞設段124的第一連接段125 ;而該第二支承部 122具有一個設置有該等滾珠軸承15，並可相對該第二拖 支轴13樞擺的第二結合段126、一供該後輪軸1〇4之另一 端樞設的第二樞設段127，及一連接該第二結合段丨26與該 第一樞設段127的第二連接段128。 由於s玄主動鍵輪106是設置於該輸出軸1〇2上，且位 於該第一支承部121之第一結合段123的外側，造成與該 主動鏈輪106相互配合之該被動鏈輪1〇7與該後輪1〇9之 間的間距增大，同時也使得該後輪軸1〇4的長度增加，並 使該第一連接段125呈現朝該第一樞設段124方向傾斜彎 折的態樣，如此不但使得該機車1〇〇的體積與重量大增； 該後輪轴104更有可能因為長度過長造成結構強度下降， 進而影響了該機車100的使用壽命；而且由於該被動鏈輪 107與s玄後輪109之間的間距增大，造成該主動鏈輪丨〇6帶 動該被動鏈輪107的作用力於該後輪軸1〇4產生較大的力 矩，使得後輪109於運轉時容易偏移，影響該機車1〇〇的 穩定度。 因此’如何減少該機車1〇〇的體積與重量，並能提升 該機車1〇〇的使用壽命，成為相關業者亟欲改善的目標。 4 【發明内容】 因此:本發明之目的，即在提供一種可以縮小機車之 積^重里，且増加機車使用壽命之機車的後搖臂裝置。 於是，本發明機㈣後搖臂裝置是連接於—機車的動 一皁兀上’該機車的動力單元包括一個具有相間隔之一第 ::壁與-第二側壁的傳動箱、—樞轉地穿設於該傳動箱 一：則壁且末端樞設於該第二側壁内壁面上的傳動轴、 值：傳動轴相間隔且具有一後輪轴的後輪，及一設置於 軸上的帶動單元，該帶動單元包括-設置於該傳動 上的=該第一側壁外側的主動輪、-設置於該後輪軸 及—繞覆於該主動輪與被動輪的連動件，使 ==單元所傳遞之動力經由該傳動轴、主動輪、 Π置傳輸帶動該後輪轉動，該後搖臂裝置包 元上:::蝴箱上的結合單元，及-設置於該結合單 上的ί結包括—設置於該傳動箱之第—侧壁外壁面 ==構’及一相反於該第-結合機構設置於該 面上的第二結合機構，•中，該第 «又置於該第一側壁 主動輪的支撐架。 π坌囟上丑卓覆於6亥 該搖臂包括—嵌今右一埜 的第一支承部m第=承且框設於該支撐架上 合機構上的第二支承部：盆中支：部間隔枢設於該第二結 承部與該傳動箱的第一側壁之間：主動輪是位於該第-支 曰1 ’而該後輪軸的兩端是分 1374094 別框6又於該第一、一支承部相反於該傳動箱的一端上且 該後輪能以該第一、二支承部相對該傳動箱擺動。 本發明之功效是利用罩覆於該主動輪的支撐架，使得 該主動輪能位於該第一支承部與該傳動箱之第一側壁之間 ，有效縮減該主動輪與該第一側壁，及該被動輪與該後輪 之間的距離並減少該後輪轴的長度，進而減少機車的體積 與重量，並能提升機車的使用壽命。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之二個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中’類似的元件是以相同的編號來表示。 參閱圖2、3，本發明機車的後搖臂裝置2之第一較佳 實施例是連接於一機車（圖未示）的動力單元3上，該機 車的動力單元3包括一個具有相間隔之一第一側壁311與— 第一側壁312的傳動箱31、一樞轉地穿設於該傳動箱3ι之 第側壁311且末端樞設於該第二側壁3 12内壁面上的傳動 軸32 (僅顯示於圖3 )、一與該傳動軸32相間隔且具有一 後輪軸341的後輪34，及一設置於該傳動軸32上的帶動單 70 35,該帶動單元35包括一設置於該傳動軸32上且位於 °玄第一側壁311外側的主動輪351、一設置於該後輪軸34ι 上的被動輪352 ’及一繞覆於該主動輪351與被動輪352的 連動件353’使該動力單元3所傳遞的動力經由該傳動軸 6 32、主動輪351 輪34轉動。 連動件353、被動輪352而傳輪帶動該後 、肖佳實施例中’該主動輪351與被動輪352是皮 上W而該連動件353是繞覆於該主動輪351與被動輪352 ，'帶，當然，該主動輪351與被動輪352也可是鏈輪 。亥連動件353則是繞覆於該主動輪與被動輪352 的鏈條’依舊可以達成使該動力料3所傳遞的動力經 該傳動轴32、主動輪351、連動件353、被動輪352而傳 帶動該後輪34轉動的功效。該後搖臂裝置2包含一設置 ;z傳動相31上的結合單元21，及一設置於該結合單元 21上的搖臂24。 >閱圖3、4，在此需先說明的是，為方便說明圖4為 圖3的局部放大圖，該結合單元21包括一設置於該傳動箱 31之第一側壁311外壁面上的第一結合機構22，及一相反 於該第一結合機構22設置於該傳動箱31之第二側壁312 外2面上的第二結合機構23，其中，該第一結合機構22包 括—設置於該第一側壁311外壁面上且罩覆於該主動輪351 的支撐架221，其中，該支撐架221具有一與該主動輪351 相間隔的蓋板223、多數自該蓋板223朝該傳動箱31之第 側壁3 11方向沿伸並固設於該第一側壁3丨丨外壁面上的結 合柱224 ’及一自該蓋板223朝相反於傳動箱3!之第一側 壁3 11方向沿伸的凸柱225，其中，而且該凸柱225的直徑 小於該蓋板223的直徑。 該第二結合機構23包括一設置於該傳動箱31之第二 13.74094 側壁312外壁面上的第二軸承23i，及—極轉地穿置於該第 抽承231中的定位轴232，該第二細承231的外周面是嵌 认於該第—側| 312的外壁面上而該第二軸承⑶的内 周面則是壓抵於該定位軸232上。 。亥搖滹24包括一嵌設有一第一轴承249且枢設於該支 撐架221上的第一支承部241，及一與該第一支承部μ間 隔套設於該定位轴232上的第二支承部242，其中，該第一 支承部241具有-個嵌設有—第一轴承249而框設於該支 樓架221之凸柱225上的第一框擺段243、一連接該第一極 擺段243的第一連接段244，及一連接該第一連接段244的 第一結合段245 ;言亥第二支承# 242具有一拖設於該第二結 合機構23之定位軸232上的第二樞擺段246、一連接該第 二樞擺段246的第二連接段247，及一連接該第二連接段 247的第二結合段248，該第-轴承249外周面是嵌設於該 第一樞擺段243令，而該第一軸承249内周面是壓抵於該 凸柱225的外周緣上，該主動輪351是位於該第一支承部 241的第一樞擺段243與該傳動箱31的第一側壁311之間 ’而該後輪轴341的兩端是分別樞設於該第一、二結合段 245、248上，且該後輪能以該第一、二支承部241、242相 對該傳動箱3 1擺動。 承上所述，本發明機車的後搖臂裝置2,在實際使用上 ’會有以下所述之優點： 1.整體體積小；利用罩覆於該主動輪351之支樓架221 的所述結合枉224’使該主動輪351是位於該第一支承部 8 1374094 241 之第—· 抵 &擺段243與該傳動箱31之第一側壁311之間 ’有效縮短該傳動轴32的長度，同時，也使得設置於後輪 轴341上的被動輪352能更為接近該後輪34,縮短該後輪 軸341的長度’進而減少該後搖臂裝置2的體積有效使 該機車小型化輕量化。 、。構強度向：續上述，由於能有效縮短該傳動軸32 ”後輪軸341的長度，因此，在相同的材質與斷面情況下 ’此提以傳動軸32與後輪轴341的結構強度；也能有效1374094 VI. Description of the Invention: [Technical Field] The present invention relates to a rear rocker arm device, and more particularly to a rear rocker arm device of a locomotive. [Prior Art] Referring to Figure 1, the conventional rocker arm support structure is pivotally mounted on a locomotive 1 that includes a transmission case 101 and an output shaft 枢 02 pivotally disposed through the transmission case 101. a driving unit 103 disposed on the output shaft 1〇2, a rear wheel shaft 104 pivotally spaced from the transmission box 1〇1 on the rocker arm supporting structure, and a rear wheel axle 104 disposed on the rear wheel axle 1〇4 The upper rear wheel 1〇9 and an engine (not shown) capable of driving the output shaft 102 to rotate, the driving unit 103 includes a set on the output shaft 1〇2 and located outside the rocker arm support structure 1 a driving sprocket 106, a passive sprocket 107 disposed on the rear axle 1〇4, and a chain 1〇8 wound around the driving sprocket 1〇6 and the passive sprocket are again placed on the output The drive sprocket 1〇6 and the key bar (10) on the shaft 1〇2 transmit engine power to the driven sprocket 1〇7 to drive the rear wheel 1〇9 to rotate. The simmering support structure 1 includes a first ram shaft U disposed coaxially with the output shaft 102 on the transmission case 101, and a rear rocker arm 12 framed on the pivot shaft 11 a second pivot shaft 13 of the rear rocker arm 12 opposite to the first pivot shaft u, a roller disposed in the rear rocker arm 12 and pivoted on the first pivot shaft 11 The column bearing 丨4, and the two overlaps are disposed on the rear 榣#12 towel and are reduced to the ball bearing 15 on the second pivot shaft 13, and the output shaft 102 is disposed on the first pivot shaft u ^ 3 1374094 wherein the rear rocker arm π has a first support portion 121 respectively located on opposite sides of the transmission case ι, and a second support portion 122, wherein the first support portion 121 has a roller a column bearing 14 and a first joint section 123 pivotable relative to the first pole shaft 11 , a first pivot section 124 for one end of the rear axle 1〇4, and a first connection Combining the segment 123 with the first connecting portion 125 of the first pivoting portion 124; and the second supporting portion 122 has a second portion provided with the ball bearings 15 and pivotable relative to the second towing shaft 13 The second segment is pivoted joint segment 126, a rear wheel axle for the other end pivotally 1〇4 of 127, and a second coupling section connected to the second connection segment 26 Shu 127 pivotally mounted to the first section 128. The sinus active key wheel 106 is disposed on the output shaft 1〇2 and located outside the first coupling section 123 of the first support portion 121, thereby causing the passive sprocket 1 to cooperate with the driving sprocket 106. The spacing between the crucible 7 and the rear wheel 1〇9 is increased, and the length of the rear axle 1〇4 is also increased, and the first connecting section 125 is inclined to bend toward the first pivoting section 124. In this way, not only does the volume and weight of the locomotive increase greatly; the rear axle 104 is more likely to have a decrease in structural strength due to the excessive length, thereby affecting the service life of the locomotive 100; The distance between the sprocket 107 and the stern rear wheel 109 is increased, causing the driving sprocket 6 to drive the passive sprocket 107 to generate a large torque on the rear axle 1 〇 4, so that the rear wheel 109 It is easy to shift during operation, which affects the stability of the locomotive. Therefore, how to reduce the size and weight of the locomotive and increase the service life of the locomotive has become the target of the related industry. 4 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a rear rocker arm device for a locomotive that can reduce the weight of the locomotive and increase the service life of the locomotive. Thus, the rear rocker device of the present invention is connected to the saponin of the locomotive. The power unit of the locomotive includes a gearbox having one of: a wall and a second side wall, pivoting The transmission shaft is disposed on the transmission case: a drive shaft having a wall and an end pivotally disposed on the inner wall surface of the second side wall, a value of the rear wheel of the transmission shaft spaced apart and having a rear axle, and a shaft disposed on the shaft a driving unit comprising: a driving wheel disposed on the outer side of the first side wall, a rear wheel axle disposed on the transmission, and a coupling member surrounding the driving wheel and the driven wheel, so that the == unit The transmitted power drives the rear wheel to rotate via the transmission shaft, the driving wheel, and the transmission. The rear rocker device includes: a binding unit on the butterfly box, and a ί knot disposed on the binding sheet includes - disposed on the first side wall of the gearbox - the outer wall surface = = structure and a second coupling mechanism opposite to the first coupling mechanism disposed on the surface, wherein the first side is placed on the first side wall The support frame of the drive wheel.坌囟 坌囟 丑 卓 6 6 6 6 6 6 6 6 6 6 该 该 该 该 该 该 该 该 该 该 该 该 该 该 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇The portion is spaced apart between the second bearing portion and the first side wall of the transmission case: the driving wheel is located at the first branch 曰 1 ' and the two ends of the rear wheel shaft are divided into 1374094, and the frame 6 is further 1. A support portion is opposite to one end of the transmission case and the rear wheel is swingable relative to the transmission case by the first and second support portions. The effect of the present invention is to cover the support frame of the driving wheel so that the driving wheel can be located between the first supporting portion and the first side wall of the transmission box, thereby effectively reducing the driving wheel and the first side wall, and The distance between the passive wheel and the rear wheel reduces the length of the rear axle, thereby reducing the volume and weight of the locomotive and improving the service life of the locomotive. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention. Before the present invention is described in detail, it is to be noted that in the following description, similar elements are denoted by the same reference numerals. Referring to Figures 2 and 3, a first preferred embodiment of the rear rocker assembly 2 of the locomotive of the present invention is coupled to a power unit 3 of a locomotive (not shown), the power unit 3 of the locomotive comprising a spaced apart a first side wall 311 and a transmission case 31 of the first side wall 312, a drive shaft 32 pivotally disposed on the side wall 311 of the transmission case 3 and pivoted on the inner wall surface of the second side wall 3 12 ( Only shown in FIG. 3), a rear wheel 34 spaced apart from the transmission shaft 32 and having a rear axle 341, and a driving unit 70 35 disposed on the transmission shaft 32, the driving unit 35 includes a a driving wheel 351 on the transmission shaft 32 and located outside the first side wall 311, a driven wheel 352' disposed on the rear wheel 34341, and a linking member 353' wound around the driving wheel 351 and the driven wheel 352 The power transmitted by the power unit 3 is rotated via the transmission shaft 6 32 and the driving wheel 351 wheel 34. After the linking member 353 and the driven wheel 352 are driven by the transmitting wheel, in the embodiment of the present invention, the driving wheel 351 and the driven wheel 352 are on the skin W, and the linking member 353 is wound around the driving wheel 351 and the driven wheel 352. 'Belt, of course, the drive wheel 351 and the driven wheel 352 may also be sprocket wheels. The chain link 353 is a chain that is wound around the driving wheel and the driven wheel 352. The power transmitted by the power material 3 can be achieved through the transmission shaft 32, the driving wheel 351, the linking member 353, and the driven wheel 352. The effect of rotating the rear wheel 34 is promoted. The rear rocker arm assembly 2 includes a mounting unit 21 on the z-transmission phase 31, and a rocker arm 24 disposed on the coupling unit 21. 3 and 4, it is to be noted that, for convenience of explanation, FIG. 4 is a partial enlarged view of FIG. 3, and the combining unit 21 includes a peripheral wall surface of the first side wall 311 of the transmission case 31. a first coupling mechanism 22, and a second coupling mechanism 23 disposed on the outer surface of the second side wall 312 of the transmission case 31 opposite to the first coupling mechanism 22, wherein the first coupling mechanism 22 includes The outer wall surface of the first side wall 311 covers the support frame 221 of the driving wheel 351. The support frame 221 has a cover plate 223 spaced apart from the driving wheel 351, and most of the driving plate 223 is driven from the cover plate 223. The side wall 3 11 of the box 31 extends along the connecting post 224 ′ which is fixed on the outer wall surface of the first side wall 3 and a direction from the cover 223 opposite to the first side wall 3 11 of the transmission case 3! The protruding post 225 extends, wherein the diameter of the stud 225 is smaller than the diameter of the cover plate 223. The second coupling mechanism 23 includes a second bearing 23i disposed on the outer wall surface of the second 13.74094 side wall 312 of the transmission case 31, and a positioning shaft 232 that is rotatably inserted into the first pumping member 231. The outer peripheral surface of the second support 231 is embedded on the outer wall surface of the first side 312, and the inner peripheral surface of the second bearing (3) is pressed against the positioning shaft 232. . The first rocking jaw 24 includes a first bearing portion 241 embedded with a first bearing 249 and pivoted on the support frame 221, and a second sleeve spaced apart from the first bearing portion 51 on the positioning shaft 232. The first supporting portion 241 has a first frame portion 243 that is embedded in the first column 249 and is disposed on the boss 225 of the branch frame 221, and connects the first portion a first connecting portion 244 of the pole pendulum portion 243, and a first joint portion 245 connected to the first connecting portion 244; the second support # 242 has a drag on the positioning shaft 232 of the second joint mechanism 23 a second pivoting section 246, a second connecting section 247 connecting the second pivoting section 246, and a second coupling section 248 connecting the second connecting section 247, the outer peripheral surface of the first bearing 249 is embedded In the first pivoting portion 243, the inner peripheral surface of the first bearing 249 is pressed against the outer circumference of the protruding post 225, and the driving wheel 351 is located at the first pivoting portion of the first supporting portion 241. 243 is between the first side wall 311 of the transmission case 31 and the two ends of the rear wheel shaft 341 are respectively pivoted on the first and second coupling sections 245, 248, and thereafter The wheel can swing with respect to the transmission case 31 by the first and second support portions 241, 242. As described above, the rear rocker device 2 of the locomotive of the present invention has the following advantages in practical use: 1. The overall volume is small; and the cover is used to cover the support frame 221 of the drive wheel 351. The driving wheel 351 is disposed between the first support portion 8 1374094 241 and the first side wall 311 of the transmission case 31 to effectively shorten the length of the transmission shaft 32. At the same time, the passive wheel 352 disposed on the rear wheel axle 341 can be closer to the rear wheel 34, and the length of the rear wheel axle 341 can be shortened, thereby reducing the volume of the rear rocker arm device 2, thereby effectively miniaturizing the locomotive. Quantify. ,. The strength of the structure is as follows: Since the length of the rear axle 341 of the transmission shaft 32" can be effectively shortened, the structural strength of the transmission shaft 32 and the rear axle 341 is raised in the case of the same material and section; Effective
減該緩主動輪351以連動件353帶動該被動輪352時於該 後輪轴341所產生的力矩，進而提升機車的操控穩定性與 使用哥命。 3·外觀佳：由於該主動輪351是位於該第-支承部241 之第梅擺I又243與該傳動箱3】之第一側壁3 j i之間，使 該連動件353也能位於該第_支承部241與該第一側壁川 之間，避免該連動# 353夕卜露於該第-支承部241之第一 樞擺段243外，使機車的外觀更加簡潔美觀。The torque generated by the slow drive wheel 351 when the driven wheel 352 drives the driven wheel 352 is increased by the linkage 353, thereby improving the steering stability and the use of the locomotive. 3. Appearance is good: since the driving wheel 351 is located between the first pendulum I 243 of the first supporting portion 241 and the first side wall 3 ji of the transmission case 3, the linking member 353 can also be located at the first Between the support portion 241 and the first side wall, the linkage # 353 is prevented from being exposed outside the first pivoting portion 243 of the first support portion 241, so that the appearance of the locomotive is more simple and beautiful.
參閱圖5，本發明機車的後搖臂裝置2之第二較佳實施 例大致是與該第-較佳實施例相同，相同的地方不再贅士 ’不相同的地方在於：該傳動軸32面向該蓋板223的一： 形成有-定位孔32!，而該第一結合機構22更具有一設置 於該定位孔321中的第三轴承以，而該支揮架221則更具 有-自該蓋板223朝該傳動箱31方向沿伸並穿設於該第三 轴承226中的定位柱227，並中，哕筮一仏j。 ' r这第二軸承220的外周面 則是罪抵於該疋位孔321 ’而第r:勒是” Α从如成 矛一釉承226的内周面是嵌設 9 1374094 於該定位柱227上，使得該傳動軸32可利用該第三軸承 226而相對該定位柱227轉動。 因為本實施例之整體結構大致皆與前述第一較佳實施 例相同，因此上述所提及的各種功效，本實施例亦確實能 達成’在此不再贅述’除此之外’本實施例更可利用該定 位柱227以支撐該傳動軸32突出該第一侧壁311的一端， 一方面提高該傳動軸32的轉動穩定性，另一方面也可防止 該傳動軸32因主動輪351的重量而產生變形。 综上所述’本發明機車的後搖臂裝置2利用罩覆於該 主動輪351上的第一結合機構22，使得該主動輪351能位 ；第支承。卩241的第一樞擺段243與該傳動箱31的第 側壁3 11之間，有效縮減該主動輪35 1與該第一側壁3 i j .之間的距離，及該被動輪352與該後輪34間的距離，進而 減玄傳動轴32與後輪軸341的長度，以減少機車的體積 與重虿，並能提升機車的結構強度與穩定性進而提高使用 壽命’故確實能達成本發明之目的。 ^惟以上所述者，僅為本發明之較佳實施例而已，當不 々乂此限疋本發明實施之範圍，即大凡依本發明申請專利 ★圍及發明5兒明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 .圖1是一局部剖視圖，說明現有搖臂支承構造的態樣 9 圖2疋側視圖，說明本發明機車的後搖臂裝置之第 10 1374094 一較佳實施例 圖3是一局部剖視圖，輔助說明圖2 ; 圖4是一局部放大剖視圖，輔助說明圖3中的細部構 件；及 圖5是一局部放大剖視圖，說明本發明機車的後搖臂 裝置之第二較佳實施例。 1374094 【主要元件符號說明】 2…… …後搖臂裝置 245… •…第一結合段 21 •.… •…結合單元 246… …·第二樞擺段 22…- •…第一結合機構 247… …第二連接段 221 ·· •…支撐架 248… •…第二結合段 223… —蓋板 249… …第一軸承 224… •…結合柱 3…… •…動力單元 225… …·凸柱 31 ••… •…傳動箱 226… —第轴承 311 ··· …第一側壁 227… •…定位柱 312… …·第二側壁 23…… …第二結合機構 32…… •…傳動轴 231 ··· …第二軸承 321… …·定位孔 232 ··· …定位軸 34…… …後輪 24…… …搖臂 341 ·· …後輪轴 241 ···· …第一支承部 35…… …帶動單元 242 ··_ …第二支承部 351 ··· …主動輪 243 ·.·_ …第一枢擺段 352 ··. …被動輪 244 ··· …第一連接段 353 ···· …連動件Referring to Figure 5, the second preferred embodiment of the rear rocker assembly 2 of the locomotive of the present invention is substantially the same as the first preferred embodiment. The same place is no longer a gentleman's difference: the drive shaft 32 One of the cover plates 223 is formed with a positioning hole 32!, and the first coupling mechanism 22 further has a third bearing disposed in the positioning hole 321, and the support frame 221 has a self-self The cover plate 223 extends toward the transmission case 31 and passes through the positioning post 227 in the third bearing 226, and is in the middle. ' r the outer peripheral surface of the second bearing 220 is the sin against the clamping hole 321 ' and the r: Le is "" from the inner peripheral surface of the glaze 226 is embedded 9 1374094 in the positioning column 227, the drive shaft 32 can be rotated relative to the positioning post 227 by using the third bearing 226. Since the overall structure of the embodiment is substantially the same as the foregoing first preferred embodiment, the various functions mentioned above are In this embodiment, it is also possible to achieve the above description. In addition, the positioning post 227 can be used to support the end of the first side wall 311 of the transmission shaft 32. The rotational stability of the drive shaft 32, on the other hand, also prevents the drive shaft 32 from being deformed by the weight of the drive wheel 351. In summary, the rear rocker assembly 2 of the locomotive of the present invention utilizes a cover over the drive wheel 351. The upper coupling mechanism 22 is configured to enable the driving wheel 351 to be in position; between the first pivoting section 243 of the second support 241 and the third side wall 31 of the transmission case 31, the driving wheel 35 1 is effectively reduced a distance between the first side wall 3 ij . and the passive wheel 352 and the rear wheel 34 The distance, in turn, reduces the length of the Xuan transmission shaft 32 and the rear axle 341 to reduce the volume and weight of the locomotive, and can improve the structural strength and stability of the locomotive and thereby improve the service life. Therefore, the object of the present invention can be achieved. However, the above is only the preferred embodiment of the present invention, and is not limited to the scope of the present invention, that is, the simple application of the patent application according to the present invention and the content of the invention. The effect changes and modifications are still within the scope of the present invention. [Simplified illustration of the drawings] Fig. 1 is a partial cross-sectional view showing the state of the prior rocker arm support structure. Fig. 2 is a side view showing the locomotive of the present invention. FIG. 3 is a partial cross-sectional view for assistance in explaining FIG. 2; FIG. 4 is a partially enlarged cross-sectional view for explaining the detailed member of FIG. 3; and FIG. 5 is a partial enlarged view A cross-sectional view showing a second preferred embodiment of the rear rocker device of the locomotive of the present invention. 1374094 [Remarks of main component symbols] 2... Rear rocker device 245... • First joint section 21 • .......integration unit 246...the second pivoting section 22...-...the first coupling mechanism 247...the second connection section 221...the support frame 248...the second joint section 223...the cover 249... The first bearing 224... • The binding column 3... • The power unit 225... The boss 31 ••... • The gearbox 226... The first bearing 311 ···...the first side wall 227... Positioning post 312...the second side wall 23...the second coupling mechanism 32...the...the transmission shaft 231 ···...the second bearing 321...the positioning hole 232 ···...the positioning shaft 34... Wheel 24.........rocker arm 341 ··...rear axle 241 ·····the first support part 35...the drive unit 242··_...the second support part 351 ···...the drive wheel 243 ·.· _ ...first pivoting section 352 ··....passive wheel 244 ···...first connecting section 353 ···· ... linkage
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