200528631 九、發明說明： 【發明所屬之技術領域】 本發明係關於-種具有氣門機構之 載四行程引擎為特徵之機車。 及以搭 【先前技術】 :前先：載:例如機車之四行程引擎中，有配 =導用於此種氣門機構之凸輪鏈，以 鏈“件扣住’將該鏈條導件收容於鍵條箱内，夢 右，出之-對定位部，使鏈條導件之—端部側可自曰由搖^ 地文支持於形成在鏈條箱之壁部之嵌合凹部，而將另 部嵌合於設置於鏈條箱之下部 υ。 又行凹^(例如專利文獻 [專利文獻1]日本專利特開平uqogus號公報 ,然而’鏈條導件之-對定位部係可自由搖動地受支持於 形成錢紅體之壁部之嵌合凹部，該後合凹部形成於將氣 缸體安裝於曲軸箱之安裝孔之附近。若該嵌合凹部過於接 近安裝孔則強度會降低，所以有必要在其與安裝孔之間確 保特定之壁厚。在確保該特定壁厚之情況下，需將鏈條箱 向侧方移動’所以會有引擎體積變大等問題。 本發明係赛於以上問題點開發而成，其目的在於提供一 行私引擎及機車，其不必將鍵條箱向外側移動，即可 在鏈條箱與安裝孔之間麵特定之壁厚，並得以支持鍵條 導件。 96479.doc 200528631 【發明内容】 為了解決前述問曰首、， ^, ,t 畸亚達成目的，本發明係如下構成。 ,^ 月係―種四行程引擎，其係包含以200528631 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a locomotive featuring a four-stroke engine with a valve mechanism. [Previous technology]: Previous: Load: For example, in a four-stroke engine of a locomotive, there is a cam chain equipped with a guide for this type of valve mechanism, and the chain guide is "locked" with the chain to receive the chain guide on the key. In the case, right of the dream, out of it-to the positioning part, so that the end of the chain guide can be shaken ^ Earthly support in the recessed recess formed in the wall of the chain box, and insert the other part It is installed at the lower part of the chain box. Also concave (for example, Patent Document [Patent Document 1] Japanese Patent Laid-Open Publication No. uqogus, however, 'the positioning guide of the chain guide can be freely shaken and supported by the formation of The fitting recess of the wall part of Qianhong body is formed near the mounting hole where the cylinder block is mounted on the crankcase. If the fitting recess is too close to the mounting hole, the strength will be reduced, so it is necessary to connect it with the recess. A specific wall thickness is ensured between the mounting holes. When the specific wall thickness is ensured, the chain box needs to be moved to the side, so there is a problem that the volume of the engine becomes large, etc. The present invention was developed based on the above problems , Its purpose is to provide a line of private engines and locomotives It does not need to move the key box to the outside, it can specify the wall thickness between the chain box and the mounting hole, and can support the key guide. 96479.doc 200528631 [Summary of the Invention] In order to solve the aforementioned problems, ^,, t To achieve the objective, the present invention is structured as follows. ^ month system-a four-stroke engine, which includes
缸脰、安裝於該氣知辦 > — 者·《L 、 氣叙蓋、將曲轴之迴轉力傳# $ 凸輪軸之凸輪鏈、抽 得刀傳遞至 及开彡成於二^ P制别述凸輪鏈之移動之鏈條導件，以 乂 ;則述虱缸體和前述氣缸蓋 件之鏈條箱，·苴特肩保持m返鏈條導 、 一寺铽在於，該四行程引擎中， 於鈿述鏈條導件形#古 成有自側部向側方突出之凸部； 杰别述鏈條箱形成有嵌人 於計凉山人 ϋ支持别述凸部之嵌合凹部；且 、别述敢5凹部處形成有逃離部 方向上看安裝有前述 免/…、自巩缸軸 生干擾。 〃 |之仏體之安裝孔在徑向上發 請求項2之發明係如請 _ 、之四行程引擎，：Μ:中前计、山 合凹部形成有··自氣紅軸方向看 〃中… 口P以及與前述安裝孔留有 重且 田另付疋間隔之逃離部。 請求項3之發明係如請求 山人 負或2之四行程引擎，苴中言r、+、 肷合凹部自氣紅軸方向看呈四角形 擎/、中則返 側之角部切成傾斜狀而形成前述逃離部裝孔 請求項4之發明係如請求項2或3之 述鏈條導件之凸部 矛引擎，、中在雨 U、山人, 虱缸軸方向看與前述鏈條箱之 刖述肷合凹部留有特定間隙之 之 ^ . xS . 相同形狀之重疊部及逃離部。 Μ未項5之發明係請求項丨 ,^ 甲任一項之四行程引肇，甘 中在前述鏈條導件之凸部之上 面抵接之面部。 冑人前述鏈條箱之頂 96479.doc 200528631 4項6之發明係—種機車，其特徵係搭載 该四行程引擎包含：氣缸體、安裝於 弓1擎 將曲軸之迴轉力傳遞至凸輪…缸盍、 輪鏈之移動之鏈條墓杜鍵、抑制前述凸 ,s 条¥#’以及形成於前述氣紅體和前述氣 盍、收納保持前述鏈條導件之鏈條箱，·且 於:述鏈條導件形成有自側部向側方突出之凸部； :::鏈條箱形成有嵌合支持前述凸部之嵌合：部 :=、凹部形成有逃離部，以避免其與自氣紅軸方向上 ^ 4歧盍之氣缸體之安裝孔在徑向上發生干擾； :a減前述凸輪軸設置於車體寬度 寬度方向側部包含蔣今、+、4體之 之前述凸輪鍵 述曲轴之迴轉力傳遞至前述凸輪轴 【發明效果】 藉由前述構成，本發明具有如下效果。 在明求項1之發明令，於鍵條 出之凸部；於嵌合支持凸部之：成有自側部向側方突 辛 邛之肷&凹部形成有逃離部，以 C免自乳缸軸方向看，盘— 在_向#^ +捍 /、有軋缸盍之氣缸體之安裝孔 外「鍵：ΐ:ιν:此’能夠使鏈條導件靠近氣叙側。此 卜鏈条相不必向外侧伸出，即可確保氣 嵌合凹部之間之壁Μ，I # 文衣札興 孔部之強度降低。 等鏠條導件而不致造成安裝 在請求項2之發明中 與安裝孔重疊之重叠部 逃離部，如此即可不必 '自氣缸軸方向看，嵌合凹部形成有 ，以及與安裝孔留有特定之間隔之 將鏈條箱向外側移動而得以確保特 96479.doc 200528631 定之壁厚。 在請求項3之發明中，自氣红轴方向看，嵌合凹部 四角形，並將該四角形之安裝孔側之角部切成傾斜狀= 成逃離部，如此即可不必將鏈條箱向外側移動^ 特定之壁厚。 萑保 在請求項4之發明中，自氣紅軸方向看，在鍵條導件之凸 部形成有與鏈條箱之喪合凹部留有特定間隙之相同 重疊部和逃離部，如此即可在確保特定之壁厚之同時 止鏈條導件下落。 、 f請求項5之發明中，在鏈條導件之凸部之上端設置與鍵 條相之頂面抵接之表面部分，則即使鏈條導件上下震動， 由於其與鏈條箱之頂面相抵故磨損程度小。 在明求項6之發明中，將曲軸及凸輪軸設置於車體 向，並在車體之寬度方向側部搭載具有將曲轴之迴轉:傳 遞至凸輪軸之凸輪鏈之四行程引擎，藉此使鍵條箱不必向 寬度方向之侧方伸出，即可在鏈條箱不與地面抵接之情況 下確保傾斜角。 【實施方式】 以下，對本發明之四行程引擎及機車之實施形態進行説 明’但本發明並不受本實施形態所限制。此外，本發明之 實施形態係表示發明之最佳狀態，本發明-詞並不僅限定 於此。 圖1為搭載四行程引擎之機車之側面圖，·圖2為機車之後 輪-側之平面圖；圖3為單元搖擺式動力單元之剖面圖；圖 96479.doc 200528631 4為以剖面表示鏈條箱並卸 P… P卜傳動相盍後之單元搖擺式動 力早兀之側面圖；圖5為將以剖面表示引攀部之一部分省略 後之單元搖擺式動力單元之側面圖；圖6為氣叙體之平面 圖，圖7為沿圖6之ViI_VIi線之剖面圖；則為鍵條導件之側 視圖，·圖9為鏈條導件之平面圖；圖1〇為沿圖8<χ_χ線之剖 面圖；圖U為沿圖8之ΧΙ·ΧΙ線之剖面圖；圖12為沿圖9之 ΧΠ-ΧΙΙ線之剖面圖；圖13為矣 山 ㈡U為表不肷合凹部之其他實施 之圖式。 在該等圖式中，以符號】表示者係搭載有四行程引擎之機 車，而在纟實施形態中係指小輪機車（scooter，速克達）。 如圖1及圖2所示，該機軔包含車體8、前輪2及後輪3,採 用藉由早70搖擺式動力單元4來驅動後輪3之構造。車體8 包含，車架8a及連接於主車架仏後部之左右成對之導件架 8b °單元搖擺式動力單元4包括水冷式四行程單缸引擎5以 及與該引擎5形成-體並於後輪3之左側向後方延伸之傳動 箱6 〇 單元搖擺式動力單元4藉由連桿機構7而可於上下方向搖 動自如地連結於左右之導件架8b，在傳動箱6之後端部支持 有後輪3。此外，在傳動箱6之後端部與導件架扑之間安裝 有避震單元9。傳動箱6位於後輪3之左側。 在引擎5之上侧連接有進氣管2〇，該進氣管2〇向後方延 長在°亥進氣管2 0上連接有化油器21，此外在化油器21上 ;丨以軟官22連接有空氣濾清器23。空氣濾清器23設置於單 疋搖擺式動力單元4之傳動箱6之上方。 96479.doc 200528631 在引擎5之下側連接有排氣管30，該排氣管30經由引擎5 之右側向後方延伸，該排氣管3〇連接有消音器3 i。該消音 器3 1设置於後輪3之右側。 下面，根據圖2至圖12來説明單元搖擺式動力單元4。引 擎5包含曲軸箱50、氣缸體51、氣缸蓋52及蓋體53 ;曲軸箱 50包含左右分割箱50a、5〇b。傳動箱6包含内側箱6〇a和外 側箱60b。内側箱60a與分割箱5〇b形成一體，在該内側箱6〇a 中设置有後輪支持箱61，藉由該後輪支持箱61與内側箱6〇a 之後部60a 1來支持後輪3之車軸4〇。 在傳動箱6之内侧箱60a與外侧箱6〇b之内部收容有將引 擎5之動力傳遞給後輪3之動力傳遞裝置“。該動力傳遞裝 置62包含V形皮帶式自動變速機〇、離心式離合器㈠、齒輪 式減速機65等。此外，在傳動箱6之外側箱60b處設置有腳 踩式之起動馬達66。 在引擎5之左右分割箱5〇a、5〇b處軸支有曲軸54，於其一 端认置有發電機55’而在另一端設置有v形皮帶式自動變速 機63之輸入側。該分割箱5〇b與内側箱6如形成一體。氣缸 蓋52與氣虹體51以及左右分割箱5〇a、鳩藉由安裝螺检w 形成-體設置於氣缸體51中可以往復運動之活塞Μ介以 連桿59而連結於曲軸54。 在活塞58之頭部與氣缸蓋52之間形成燃燒室川，在接近 該燃燒室7〇之氣知蓋52上設置火星塞71。在氣紅蓋52處， 形成有與燃燒室70相連通之進氣通路72和排氣通路Μ，而 進氣通路72藉由進氣閥74控制其開關，排氣通路73通過排 96479.doc 200528631 氣閥75控制其開關 該進氣閥74與排氣閥75藉由氣門機構叫驅動。氣門機 構80之凸輪軸81軸支在氣紅蓋52之上部，在該凸輪轴社 設置有凸輪82a、82b。藉由凸輪軸81之迴轉，凸輪82a介以 搖臂83a使進氣閥74作動’而凸輪82b介以搖臂8^吏排氣闕 7 5作動。 連接引擎5之分割箱5〇b、氣缸體5 1 氣紅蓋52及氣缸蓋 罩體99之間之孔狀鏈條箱83形成為與氣缸軸線平行；在 該鏈條箱83中之分割箱50b部分中，曲軸M之端部突出，而 在該突出部安裝有驅動鏈輪84。Cylinder 脰, installed in the Qi Zhi Office > — "L, air cover, transmission of the rotational force of the crankshaft # $ the cam chain of the camshaft, the pumping knife is passed to and opened in two ^ P system The moving chain guide of the cam chain is described by 乂; then the chain box of the lice cylinder body and the aforementioned cylinder head is described, and the special shoulder holds the m return chain guide. One temple is that in the four-stroke engine, the Mentioned chain guide shape # 古 成 has a convex portion protruding from the side to the side; a chain box formed with a fitting recessed portion embedded in the Jiliangshan people to support the other convex portion; The recess is formed with the above-mentioned free / ..., interference from the scleral cylinder shaft when viewed from the direction of the escape portion. 〃 | The installation hole of the carcass is sent in the radial direction of the invention of claim 2. The four-stroke engine: M: Middle-front meter, Shanhe concave part is formed .... Seeing from the direction of the red axis ... The mouth P and the escape portion which is heavy and is spaced apart from the aforementioned mounting hole. If the invention of claim 3 is for a four-stroke engine with a mountaineering or a two-stroke engine, the middle r, +, and the recessed part are quadrangular when viewed from the direction of the red axis of the gas, and the corners on the back side are cut into an inclined shape. The invention that forms the above-mentioned escape part mounting hole request item 4 is the convex spear engine of the chain guide as described in claim 2 or 3. It looks like the direction of the chain box is the same as the chain box. ^. XS. The overlapped portion and the escape portion of the same shape are described in the coupling recessed portion with a specific gap. The invention of item 5 is the four-stroke stroke of any one of items 丨, ^, and Gan Zhong's face abutting on the convex part of the aforementioned chain guide. The top of the aforementioned chain box was 96479.doc 200528631. The invention of 4 item 6 is a type of locomotive, which is equipped with a four-stroke engine including: a cylinder block, which is installed on the bow 1 engine and transmits the turning force of the crankshaft to the cam ... 、 Chain tomb keys for the movement of the wheel chain, suppress the aforementioned convexity, s ¥ # ', and a chain box formed in the aforementioned gas red body and the aforementioned air sac, which stores and holds the aforementioned chain guide, and described in the chain guide A convex part protruding from the side part to the side is formed; ::: The chain box is formed with a fitting for supporting the aforementioned convex part: part: =, the recess part is formed with an escape part to avoid it from the self-gas red axis direction ^ Radial interference of the mounting holes of the cylinder of 4 manifolds: a minus the aforementioned camshaft is provided on the side of the width and width of the vehicle body, and the side of the aforementioned cam key including Jiang Jin, +, and 4 transmits the rotational force of the crankshaft To the aforementioned camshaft [Effects of the invention] With the aforementioned configuration, the present invention has the following effects. In the invention order of Ming Qiu item 1, in the convex part of the key bar; in the fitting and supporting convex part: there is a escaping part from the side part to the side & the concave part is formed with an escape part, and C is free from Looking at the direction of the axis of the breast cylinder, the disk—outside of the mounting hole of the cylinder block with _ 向 # ^ + 保 /, with the rolling cylinder 「" key: ΐ: ιν: this' enables the chain guide to be closer to the gas-syringe side. This chain The strip phase does not need to protrude to the outside to ensure that the strength of the wall M between the air-fitting recessed portions and the hole portion of the I-clothing Zaxing hole is reduced. The strip guide is not caused to be installed in the invention of claim 2 and The overlapping part escape portion of the mounting hole overlaps, so that it is not necessary to see from the direction of the cylinder axis, the fitting recess is formed, and the chain box is moved to the outside with a certain distance from the mounting hole to ensure the special 96479.doc 200528631 In the invention of claim 3, when viewed from the direction of the air red axis, the recessed part is fitted into a quadrangle, and the corner of the mounting hole side of the quadrangle is cut into an oblique shape = it is an escape part, so that it is not necessary to chain The box moves outward ^ a specific wall thickness. In the invention of claim 4, it is self-defeating. Viewed in the axial direction, the same overlapped portion and escaped portion with a specific gap from the recessed portion of the chain box are formed in the convex portion of the key guide, so that the chain guide can be prevented from falling while ensuring a specific wall thickness. In the invention of claim 5, f is provided on the upper end of the convex portion of the chain guide with a surface portion abutting the top surface of the key phase, even if the chain guide vibrates up and down, because it abuts the top surface of the chain box The degree of wear is small. In the invention of Explicit Item 6, the crankshaft and camshaft are arranged in the direction of the vehicle body, and the side of the width direction of the vehicle body is equipped with the four strokes of the cam chain that rotates the crankshaft: transmitted to the camshaft The engine prevents the key box from protruding to the side in the width direction, so as to ensure the inclination angle without the chain box contacting the ground. [Embodiment] Hereinafter, the four-stroke engine and locomotive of the present invention will be described. The embodiment will be described, but the present invention is not limited by this embodiment. In addition, the embodiment of the present invention indicates the best state of the invention, and the present invention is not limited to this. Figure 1 is equipped with a four-stroke guide Side view of Qingzhi locomotive, Figure 2 is a plan view of the rear wheel-side of the locomotive; Figure 3 is a cross-sectional view of the unit swing type power unit; Figure 96479.doc 200528631 4 is a cross-section showing the chain box and unloading P ... P The side view of the unit swing type power unit after the relative phase; Figure 5 is a side view of the unit swing type power unit after a part of the lead-in part is omitted in a cross section; FIG. 6 is a plan view of the gas type body, and FIG. 7 is A cross-sectional view taken along line ViI_VIi in FIG. 6; a side view of the key bar guide, FIG. 9 is a plan view of the chain guide; FIG. 10 is a cross-sectional view taken along line 8 <χ_χ; FIG. U is taken along FIG. 8 A cross-sectional view taken along the line XIX.XII; FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG. 9; and FIG. 13 is a diagram showing other implementations in which the recessed portion is not shown. In these drawings, the symbol [] represents a locomotive equipped with a four-stroke engine, and in the embodiment, it refers to a scooter (scooter). As shown in Figs. 1 and 2, the machine frame includes a vehicle body 8, a front wheel 2, and a rear wheel 3, and adopts a structure in which the rear wheel 3 is driven by an early 70 swinging power unit 4. The vehicle body 8 includes a vehicle frame 8a and a pair of left and right guide frames 8b connected to the rear of the main frame 单元. The unit swinging power unit 4 includes a water-cooled four-stroke single-cylinder engine 5 and a body united with the engine 5. The transmission case 6 extending rearward from the left side of the rear wheel 3. The unit swing type power unit 4 is swingably connected to the left and right guide frames 8b in the vertical direction by the link mechanism 7. The rear end of the transmission case 6 Support for rear wheel 3. Further, a shock absorbing unit 9 is installed between the rear end of the transmission case 6 and the guide frame flutter. The transmission case 6 is located on the left side of the rear wheel 3. An intake pipe 20 is connected to the upper side of the engine 5, and the intake pipe 20 is extended rearward. A carburetor 21 is connected to the intake pipe 20, and the carburetor 21 is connected to the carburetor 21; Air cleaner 23 is connected. The air cleaner 23 is disposed above the transmission case 6 of the single-swinging power unit 4. 96479.doc 200528631 An exhaust pipe 30 is connected to the lower side of the engine 5, the exhaust pipe 30 extends to the rear via the right side of the engine 5, and the muffler 3 i is connected to the exhaust pipe 30. The muffler 31 is provided on the right side of the rear wheel 3. Next, the unit swing type power unit 4 will be described with reference to FIGS. 2 to 12. The engine 5 includes a crankcase 50, a cylinder block 51, a cylinder head 52, and a head 53; the crankcase 50 includes left and right divided boxes 50a and 50b. The transmission case 6 includes an inner case 60a and an outer case 60b. The inner box 60a is integrated with the split box 50b, and a rear wheel support box 61 is provided in the inner box 60a. The rear wheel support box 61 and the rear portion 60a1 of the inner box 60a support the rear wheels. 3 of the axles 40. A power transmission device that transmits the power of the engine 5 to the rear wheels 3 is housed inside the inner case 60a and the outer case 60b of the transmission case 6. The power transmission device 62 includes a V-belt type automatic transmission, and centrifugal Type clutch ㈠, gear reducer 65, etc. In addition, a step-type starter motor 66 is provided at the outer side box 60b of the transmission case 6. The shafts are supported at the 50 and the division boxes 50a and 50b on the left and right sides of the engine 5. The crankshaft 54 is provided with a generator 55 'at one end and an input side of a v-belt type automatic transmission 63 at the other end. The division box 50b and the inner box 6 are integrally formed. The cylinder head 52 and the air The rainbow body 51 and the left and right division boxes 50a, and the dove are formed by mounting the screw inspection w. The piston M, which is provided in the cylinder block 51 and can reciprocate, is connected to the crankshaft 54 through a connecting rod 59. On the head of the piston 58 A combustion chamber channel is formed between the cylinder head 52 and a gas spark plug 71 on the gas sensing cover 52 close to the combustion chamber 70. At the gas red cover 52, an intake passage 72 and an air passage 72 communicating with the combustion chamber 70 are formed. The exhaust path M, and the intake path 72 is controlled by an intake valve 74, and the exhaust path 73 The row 96479.doc 200528631 controls the opening and closing of the valve 75. The intake valve 74 and the exhaust valve 75 are driven by a valve mechanism. The cam shaft 81 of the valve mechanism 80 is supported above the gas red cover 52. The company has cams 82a and 82b. When the camshaft 81 rotates, the cam 82a operates the intake valve 74 through the rocker arm 83a and the cam 82b operates through the rocker arm 8 and the exhaust valve 75. Connection engine 5 The hole-shaped chain box 83 between the divided box 50b, the cylinder block 5 1 gas red cover 52 and the cylinder head cover 99 is formed parallel to the cylinder axis; in the divided box 50b portion of the chain box 83, the crankshaft The end portion of M protrudes, and a drive sprocket 84 is attached to the protruded portion.
凸輪軸81之端部向鏈條箱83内突出，在該端部安裝有從 動鏈輪85。纟該從動鏈輪85與，驅動鍵輪84之間捲掛有、凸^ 鏈86，藉由該凸輪鏈86向與驅動鏈輪以之相同方向迴轉= 動。此外’在凸輪軸81上設置有冷卻系98,藉由凸輪軸8ι 對其進行驅動。 凸輪鏈86自鬆緊側之外側頂住緊鏈器87，以保持驅動鍵 輪84與從動鏈輪85間之鬆緊度。緊鏈器87之結構係：將— 端之支持部87a嵌合於形成於分割箱5〇b之壁部之凹部j 内而受到支點支持，並使另一端87b成為自由端，藉由調節 裔8 8將中間部向凸輪鏈8 6推壓。 ° 在作為凸輪鏈86之拉動側之緊鏈器87之相反側，裝附有 鏈條導件89。鏈條導件89如圖8及圖】2所示，其中間部之滑 動接觸面’向凸輪鏈％推壓而突出，且整體呈略弓形； 曲，其滑動接觸面89a之相反面為背部8外。 "弓 96479.doc 12 200528631 鏈條導件89之-端成為滑動端部伙，其嵌合支持在形成 於分割箱通之鏈條箱δ3内之支持凹部。鏈條導件Μ 之另一端_為自由端，在其附近設置有左右成對之凸部 89el、89e2，錯由設置於氣缸體”之左右成對之嵌合凹部 5 lal、5 la2予以固定。 如圖3、圖4所示，藉由向與凸輪鏈％之迴轉面略平行之 氣缸軸線U方向脫模之模具形成分割箱鳩之鏈條箱以，其 係在與氣缸體5 1之接合部表面側開口之袋狀，此時支持凹 部5〇b2亦同時成形，其係於脫模方向擴張開放之略。字形之 凹陷。 如圖4、圖6所示，氣缸體51在氣缸51b之側方平行形成有 鏈條箱83，在相對於該鏈條箱83之氣缸蓋以接合面5ic附 近之對向位置形成呈略u字狀刻入之一對嵌合凹部5ui、 51a2，並面向接合面51c和鏈條箱83開放。 該嵌合凹部51a2,如圖6所示，自氣缸軸方向看呈四角形 狀。一側之嵌合凹部51al包含逃離部51aU，其係將自氣缸 軸方向看呈四角形之氣缸體51之安裝孔51e側之角部切成 .傾斜狀。該嵌合凹部51al包含切成傾斜狀之逃離部5uu， 因此無需將鏈條箱83向外側移動，就可以在鏈條箱83與安 裝孔51e之間確保特定之壁厚51f。藉由該壁厚5if，即可支 持鏈條導件89之凸部89el而不致降低氣缸體51之安裝孔附 近之強度。 此外，嵌合凹部5lal，如圖13所示’亦可作為將自氣缸 軸方向看將呈四角形之氣缸體51之安裝孔51e側之角部切 96479.doc -13- 200528631 成凹曲面形狀之逃離部5 1 a 1 1。 再者，嵌合凹部51al，如圖6及圖13所示，其包含自氣缸 軸方向看與氣缸體51之安裝孔51e重疊之重疊部5;ui2 ;此 外並包含切成能夠形成自安裝孔51e保持特定壁厚5if之形 狀之逃離部51all。 夕 自該氣缸軸方向看形成於氣缸體51之安裝孔側之逃離部 5UU，並非受限於本實施形態者，其係不必將鏈條箱幻向 外側移動便能夠在鏈條箱83與安裝孔5丨e之間確保特定之 壁厚51f’並且不需要降低氣缸體51之安裝孔附近之強度即 可支持鏈條導件89之凸部89el者。 如此，在鏈條導件89上，如圖6及圖7所示，形成自側部 向側方突出之凸部89el，，並在鏈條箱83上形成嵌合 支持凸部89el、89e2之嵌合凹部51al、51a2，將該凸部_ 89e2嵌合支持於嵌合凹部51al、51a2。 在該傲合凹部5U1處形成有避免其與自氣缸軸方向看安 裝有氣缸蓋52之氣缸體51之安裝孔5U在徑向上發生干擾 之逃離部51all，藉此就能夠使鏈條導件的向氣紅側靠近。 此外，鏈條箱83不必向外側伸屮，47 ^ 甲出，就能夠確保氣缸體51之 安裝孔51e與嵌合凹部51al之間之辟卢、， ^ 间之壁厚51f，並且無需降低 安裝孔部之強度，就可以支持鏈條導件⑽。 此外，嵌合凹部51al形成有白±丄士丄< 虿自鐵^缸軸方向看與安裝孔51e 重疊之重疊部51al2以及與安萝πςι + 、 ，、女衣孔51e間留有特定之間隔之 逃離部5 1 a 11 ’藉此，不必將赫检从 竹鏈條相83向外側移動，便能夠 確保特定之壁厚5 1 f。 96479. doc 200528631 再者，嵌合凹部51al形成有自氣缸軸方向看呈四角形且 將該四角形之安裝孔側之角部切成傾斜狀之逃離部 51all，藉此，不必將鏈條箱83向外側移動便能夠確保特定 之壁厚51f。 此外，如圖6所示，在鏈條導件89之凸部89el處形成有自 氣缸軸方向看與鏈條箱83之嵌合凹部5丨ai留有特定間隙c 之相同形狀之重疊部51al2及逃離部““丨，藉此，在確保 特定之壁厚5 1 f之同時，能夠防止鏈條導件89下落。 再者，如圖7及圖8所示，在鏈條導件89之凸部89el、8%2 之上端設有與形成於氣缸蓋52之與鏈條箱83之頂面52gl、 52g2相抵接之面部89gi、89g2，藉此，即使鏈條導件89上 下震動，由於其與鏈條箱83之頂面52gl、52g2相抵故磨損 度小。 此外’如圖3及圖4所示，在本實施形態之機車1中，曲軸 54及凸輪軸81配置於車體寬度方向，而於車體之寬度方向 側部彳合载具有將曲軸54之迴轉力傳遞至凸輪軸8丨之凸輪鏈 86之四行程引擎5，藉此，鏈條箱83不必向寬度方向之側方 伸出’就能夠在鏈條箱83不與地面抵接之情況下確保傾斜 角。 [產業上利用之可能性] t發明可以適用於將用來抑制使用於氣門機構之凸輪鏈 的移動之鏈條導件收容於鏈條箱内四行程引擎，及搭載該 四行程引擎之機車。 【圖式簡單說明】 96479.doc 200528631 圖1為搭載四行程引擎之機車之側面圖。 圖2為機車之後輪側之平面圖。 圖3為單元搖擺式動力單元之剖面圖。 圖4為以剖面表示鏈條箱並卸下傳動箱蓋後之單元 式動力單元之側面圖。 & 圖5為將以剖面表示引 式動力早元之側面圖。 圖6為氣缸體之平面圖。An end portion of the cam shaft 81 projects into the chain box 83, and a driven sprocket 85 is attached to the end portion.纟 The cam chain 86 is wound between the driven sprocket 85 and the driving key wheel 84, and the cam chain 86 rotates in the same direction as the driving sprocket = moving. In addition, a cooling system 98 is provided on the camshaft 81, and is driven by the camshaft 8m. The cam chain 86 bears against the chain tensioner 87 from the outside of the tensioning side to maintain the tightness between the driving key wheel 84 and the driven sprocket 85. The structure of the chain tightener 87 is: the support part 87a at the-end is fitted into the recess j formed in the wall part of the dividing box 50b and is supported by the fulcrum, and the other end 87b becomes a free end, and by adjusting the 8 8 Presses the middle portion toward the cam chain 8 6. ° On the opposite side of the chain tensioner 87 which is the pulling side of the cam chain 86, a chain guide 89 is attached. The chain guide 89 is shown in FIG. 8 and FIG. 2. The sliding contact surface of the middle portion of the chain guide 89 is pushed toward the cam chain and protrudes, and the overall shape is slightly bowed. The opposite side of the sliding contact surface 89 a is the back 8. outer. " Bow 96479.doc 12 200528631 The negative end of the chain guide 89 becomes a sliding end part, and the fitting support is provided in the support recess formed in the chain box δ3 of the split box passage. The other end of the chain guide M is a free end, and left and right paired convex portions 89el, 89e2 are provided in the vicinity of the chain guide M. The left and right paired fitting recesses 5lal and 5la2 are fixed in the cylinder block. As shown in Fig. 3 and Fig. 4, a mold box that is demoulded in the direction of the cylinder axis U that is slightly parallel to the cam chain's revolution surface is formed into a split box and a chain box. The chain box is connected to the cylinder block 51. The bag-shaped opening on the surface side, at this time, the supporting recessed portion 50b2 is also formed at the same time, which is slightly expanded and opened in the demolding direction. The shape is depressed. As shown in Figs. 4 and 6, the cylinder block 51 is on the side of the cylinder 51b. A chain box 83 is formed in parallel with each other, and a pair of fitting recesses 5ui and 51a2 are formed in a slightly u-shaped shape at opposite positions near the joint surface 5ic with respect to the cylinder head of the chain box 83, and face the joint surface 51c. The chain box 83 is opened. As shown in Fig. 6, the fitting recessed portion 51a2 has a quadrangular shape when viewed from the direction of the cylinder axis. The fitting recessed portion 51al on one side includes an escape portion 51aU, which is a quadrangular shape when viewed from the direction of the cylinder axis. The corner portion on the side of the mounting hole 51e of the cylinder block 51 is cut into an inclined shape. This fitting The portion 51al includes a sloped escape portion 5uu, so that a specific wall thickness 51f can be ensured between the chain box 83 and the mounting hole 51e without moving the chain box 83 to the outside. With the wall thickness 5if, the Supports the convex part 89el of the chain guide 89 without reducing the strength near the mounting hole of the cylinder block 51. In addition, the fitting recess 5lal, as shown in FIG. 13, can also be used as a cylinder block that will be square when viewed from the cylinder axis direction. The corners on the side of the mounting hole 51e of 51 are cut from 96479.doc -13- 200528631. The escaped portions 5 1 a 1 1 having a concave curved surface shape. Furthermore, as shown in FIG. 6 and FIG. 13, the fitting concave portion 51 The overlapping portion 5; ui2, which overlaps the mounting hole 51e of the cylinder block 51 when viewed in the direction of the cylinder axis, and includes an escape portion 51all cut into a shape capable of forming a self-mounting hole 51e to maintain a specific wall thickness 5if. Seen from the direction of the cylinder axis The escape portion 5UU formed on the mounting hole side of the cylinder block 51 is not limited to this embodiment, and it is possible to ensure the specificity between the chain box 83 and the mounting hole 5 丨 e without moving the chain box to the outside. Wall thickness 51f 'and no need to lower cylinder block 51 The strength near the mounting hole can support the convex portion 89el of the chain guide 89. Thus, as shown in Figs. 6 and 7, the chain guide 89 forms a convex portion 89el protruding from the side to the side, And the fitting recesses 51al, 51a2 of the fitting support protrusions 89el, 89e2 are formed on the chain box 83, and the protrusion _89e2 is fitted and supported on the fitting recesses 51al, 51a2. The avoidance recess 5U1 is formed The escape portion 51all that interferes with the mounting hole 5U of the cylinder block 51 on which the cylinder head 52 is mounted when viewed from the direction of the cylinder axis, so that the gas guide side of the chain guide can be approached. In addition, the chain box 83 does not need to protrude to the outside, and can be ensured between the mounting hole 51e of the cylinder block 51 and the fitting recess 51al, and the wall thickness 51f between the mounting hole 51e and the mounting hole need not be reduced. The strength of the part can support the chain guide ⑽. In addition, the fitting recessed portion 51al is formed with a white ± 丄 丄 lt from the iron axis direction of the cylinder axis, the overlapping portion 51al2 overlapping with the mounting hole 51e, and the Ann + +,, and women's clothing holes 51e are left with a specific The spaced escape portion 5 1 a 11 ′ can ensure a specific wall thickness 5 1 f without moving the checker from the bamboo chain phase 83 to the outside. 96479. doc 200528631 Furthermore, the fitting recessed portion 51al is formed with a escaping portion 51all which is rectangular when viewed from the cylinder axis direction and cuts the corner portion of the quadrangular mounting hole side into an inclined shape, thereby eliminating the need to move the chain box 83 to the outside The movement can ensure a specific wall thickness 51f. In addition, as shown in FIG. 6, an overlapped portion 51al2 and an escape having the same shape as the fitting recessed portion 5 of the chain box 83 viewed from the cylinder axis direction are formed at the convex portion 89el of the chain guide 89 as viewed from the cylinder axis direction. The section "" 丨 prevents the chain guide 89 from falling down while ensuring a specific wall thickness of 5 1 f. Furthermore, as shown in FIGS. 7 and 8, the upper ends of the convex portions 89el and 8% 2 of the chain guide 89 are provided with face portions that are formed on the cylinder head 52 and are in contact with the top surfaces 52 gl and 52 g 2 of the chain box 83. 89gi, 89g2, so that even if the chain guide 89 vibrates up and down, the abrasion degree is small because it is in contact with the top surfaces 52gl and 52g2 of the chain box 83. In addition, as shown in FIG. 3 and FIG. 4, in the locomotive 1 according to the present embodiment, the crankshaft 54 and the camshaft 81 are arranged in the width direction of the vehicle body, and the widthwise side of the vehicle body is loaded with the crankshaft 54. Rotating force is transmitted to the four-stroke engine 5 of the cam chain 86 of the camshaft 8, so that the chain box 83 does not need to be protruded to the side in the width direction, and the chain box 83 can be tilted without contacting the ground. angle. [Possibility of industrial use] The invention can be applied to a four-stroke engine in which a chain guide for suppressing the movement of a cam chain used in a valve mechanism is housed in a chain box, and a locomotive equipped with the four-stroke engine. [Brief description of the drawing] 96479.doc 200528631 Figure 1 is a side view of a locomotive equipped with a four-stroke engine. Fig. 2 is a plan view of the rear wheel side of the locomotive. Fig. 3 is a sectional view of a unit swing type power unit. Fig. 4 is a side view of the unit type power unit showing the chain case in a cross-section with the transmission case cover removed. & Fig. 5 is a side view showing a pull-type power early element in a cross section. Fig. 6 is a plan view of a cylinder block.
圖7為沿圖6之VII_VII線之剖面圖。 圖8為鏈條導件之側面圖。 圖9為鏈條導件之平面圖。 圖1〇為沿圖8之Χ-Χ線之剖面圖。 圖11為沿圖8之XI-XI線之剖面圖。 圖12為沿圖9之XII-ΧΠ線之剖面圖。 圖13為表示嵌合凹部之其他實施形態之圖式。 【主要元件符號說明】FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6. Fig. 8 is a side view of the chain guide. Fig. 9 is a plan view of a chain guide. FIG. 10 is a cross-sectional view taken along the line X-X in FIG. 8. FIG. 11 is a sectional view taken along the line XI-XI in FIG. 8. FIG. 12 is a sectional view taken along the line XII-XΠ in FIG. 9. FIG. 13 is a view showing another embodiment of the fitting recess. [Description of main component symbols]
1 機車 2 前輪 3 後輪 4 單元搖擺式動力單元 5 四行程單缸引擎 6 傳動箱 7 連桿機構 8 車體 96479.doc 200528631 8a 主車架 8b 導件架 9 避震單元 20 進氣管 21 4匕油器 22 軟管 23 空氣濾清器 30 排氣管 31 消音器 40 車軸 50a，50b 左右分割箱 50bl 箱壁之凹部 50b2 支持凹部 51 氣缸體 51al，5 1 a2 嵌合凹部 51all 逃離部 51al2 重疊部 51c 接合面 51e 安裝孔 51f 壁厚 52 氣缸蓋 53 蓋體 54 曲軸 55 發電機 96479.doc -17 200528631 57 螺栓 58 活塞 59 連桿 60a 内側箱 60al 内側箱之後部 60b 外側箱 61 後輪支持箱 62 動力傳遞裝置 63 自動變速機 64 離心式離合器 65 齒輪式減速機 66 起動機 70 燃燒室 71 火星塞 72 進氣通路 73 排氣通路 74 進氣閥 75 排氣閥 80 氣門機構 81 凸輪轴 82a，82b 凸輪 83 鏈條箱 83b 搖臂 84 驅動鏈輪1 Locomotive 2 Front wheel 3 Rear wheel 4 Unit rocking power unit 5 Four-stroke single-cylinder engine 6 Transmission case 7 Link mechanism 8 Body 96479.doc 200528631 8a Main frame 8b Guide frame 9 Suspension unit 20 Intake pipe 21 4 Dagger oiler 22 Hose 23 Air filter 30 Exhaust pipe 31 Muffler 40 Axle 50a, 50b Left and right split box 50bl Recessed part of the wall 50b2 Supported recessed part 51 Cylinder block 51al, 5 1 a2 Fitted recessed part 51all Escaped part 51al2 Overlap portion 51c Joint surface 51e Mounting hole 51f Wall thickness 52 Cylinder head 53 Cover body 54 Crankshaft 55 Generator 96479.doc -17 200528631 57 Bolt 58 Piston 59 Connecting rod 60a Inner box 60al Inner box rear 60b Outer box 61 Rear wheel support Box 62 Power transmission device 63 Automatic transmission 64 Centrifugal clutch 65 Gear reducer 66 Starter 70 Combustion chamber 71 Mars plug 72 Intake passage 73 Exhaust passage 74 Intake valve 75 Exhaust valve 80 Valve mechanism 81 Camshaft 82a , 82b cam 83 chain box 83b rocker arm 84 drive sprocket
96479.doc -18- 200528631 85 從動鏈輪 86 凸輪鏈 87 緊鏈器 88 調節器 89 鏈條導件 89a 滑動接觸面 89b 背部 89c 滑動端部 89d 鏈條導件另一端 89el， 89e2 凸部 96479.doc 19-96479.doc -18- 200528631 85 driven sprocket 86 cam chain 87 chain tensioner 88 adjuster 89 chain guide 89a sliding contact surface 89b back 89c sliding end 89d other end of the chain guide 89el, 89e2 convex portion 96479.doc 19-