200424425 Ο) 玖、發明說明 【發明所屬之技術領域】 本發明，係關於在內燃機的閥門裝置之搖臂軸的止轉 裝置。 【先前技術】 過去，被壓入搖臂軸孔的搖臂軸之防脫落用的止動器 已被揭示（例如參照專利文獻1。）。並且，也有如在第8 圖所示之搖臂軸的止轉裝置。此係，在2支搖臂軸〇 2 6間， 將標置板0 4 0之中央部在缸頭0 4以鎖緊螺栓0 2 3螺固，將在 其標置板0 4 0的左右臂部之兩端部下面對稱地被形成止轉 部040 a抵接在2支搖臂軸026之缺口部026a，而將此等搖臂 軸026止轉。再者，第8圖中的圖號〇18爲表示凸輪軸，〇19 係表示凸輪軸軸承。 〔專利文獻1〕 日本特開2000— 329002號公報（段落0041，第6圖、 第7圖） 【發明內容】 〔所要解決之課題〕 在前述過去的搖臂軸之止轉裝置，係將標置板〇 4 0以 鎖緊螺栓02 3鎖緊時，因標置板〇40會向其鎖緊方向旋轉， 將在鎖緊旋轉方向的後側（在第8圖爲左側）之一方的搖 臂軸026之缺口部026a和標置板〇40的止轉部040a之間產生 (2) (2)200424425 若干的空隙S。因此，在內燃機之運轉中，有在其空隙s起 因的以搖臂軸026之鬆動轉動而發生雜音的問題。 〔爲了解決課題之手段及效果〕 爲了解決前述過去的課題，申請專利範圍第1項之發 明，係在內燃機的缺頭內把1對搖臂軸互相隔著間隔倂設 ，將吸•排氣凸輪和吸·排氣閥分別連接之1對搖臂軸由 上述搖臂軸分別支持成能夠搖動的內燃機之閥門裝置，在 上述1對搖臂軸的各一部份，形成互相相對之缺口部，在 此等缺口部之間，把從凸輪軸方向觀察的斷面不平行之限 制構件插入，把該限制構件從缸頭蓋內面推壓爲特徵之搖 臂軸的止轉裝置。 申請專利範圍第1項之發明係如上述地被構成，在搖 臂軸的互相相對之缺口部間，把從凸輪軸方向觀察的斷面 不是平行之限制構件插入，因將該限制構件由缸頭蓋內面 堆壓，故能使搖臂軸和限制構件不搖幌地密接而固定。因 此，能夠防止由搖臂軸的鬆動轉動之雜音的發生和軸承之 磨損。並且，因以缸頭蓋將限制構件推壓而固定，將能省 略過去的搖臂軸止轉裝置所需要之限制構件的鎖緊螺栓， 螺孔加工工程，鎖緊工程，在成本面也將成爲有利。 接著申請專利範圍第2項之發明，係如前述申請專利 範圍第1項之發明，其特徵爲上述限制構件係成爲使缸頭 內的凸部向凸輪軸方向挾入之形狀者。 如此地在申請專利範圍第2項之發明，因係以將缸頭 -5- (3) (3)200424425 內的凸部挾入之形狀把限制構件的凸輪軸方向位置限制， 也能防止搖臂軸之軸方向的偏移所引起之磨損。並且，將 限制構件用既有的凸部固定，在缸頭側將不需要做特別之 加工，而能把位置固定。 接著申請專利範圍第3項之發明，係如前述申請專利 範圍第2項之發明，其特徵爲在上述限制構件和上述缸頭 蓋內面之間，及上述限制構件與上述凸部之間被配置彈性 構件。 ❿ 如此地在申請專利範圍第3項之發明，因挾著彈性構 件把限制構件固定，故能確實把限制構件固定。並且，缸 頭蓋的振動將由彈性構件被吸收，故由振動之噪音將被減 低。 並且申請專利範圍第4項之發明，係如前述申請專利 範圍第2項或第3項中的其中一項之發明，其中上述凸部爲 凸輪軸座，且上述限制構件係抵接在凸輪軸軸承的外側面 爲特徵。 Φ 如此地根據申請專利範圍第4項之發明時，將在凸輪 座位置將限制構件固定，同時也固定凸輪軸軸承的位置， 故凸輪軸軸承之幌蕩情形將會消失，而提高凸輪軸軸承的 耐久性。 【實施方式】 〔發明之實施形態〕 第1圖係將被適用本發明的一實施例之內燃機在略通 -6 - (4) (4)200424425 過曲柄軸線和缸軸線的平面切斷之縱斷面圖，第2圖爲同 樣地在略通過缸軸線而在與曲柄軸線正交的平面切斷之縱 斷面圖，第3圖係同樣地在凸輪鏈附近與曲柄軸線正交的 平面切斷之縱斷面圖，第4圖係將第1圖的上部擴大而顯示 之圖。 本內燃機1，係頭閥式4行程循環單氣缸內燃機，其本 體，係由：左右分割的左曲柄箱2a，右曲柄箱2b，和缸塊 3，和缸頭4，和缸頭蓋5，和左曲柄箱蓋6 a，及右曲柄箱 蓋6b而成。左曲柄箱2a和右曲柄箱2b將互相被合倂，在其 上方被依次重疊缸塊3，缸頭4，缸頭蓋5。並且，在左曲 柄箱2a的左側面有左曲柄箱蓋6a，在右曲柄箱2b之右側面 有右曲柄箱蓋6b，將被分別合倂。然後，此等左右的曲柄 箱2a、2b，缸塊3，缸頭4，缸頭蓋5，左曲柄箱蓋6a，右 曲柄箱蓋6b，將以螺栓等被互相一體地結合。 並且如在第1圖，第2圖所示，將在缸塊3所形成的缸 孔7，活塞8將自由滑動地被嵌裝，同時在左右的曲柄箱2a ，2b有曲柄軸9被軸支承爲能夠旋轉。然後，在活塞8和曲 柄軸9，分別經由活塞銷1 0和曲柄銷1 1，連桿1 2的兩端被 樞裝成能夠旋轉。如此地，由缸孔7頂部的燃燒室1 3內之 混合氣的燃燒，活塞8往復動時，成爲曲柄軸9將被旋轉驅 動。 而且，在缸孔7的頂部之燃燒室1 3連通的吸氣口 1 4及 排氣口，被形成在缸頭4，在此等吸氣口 1 4及排氣口 1 5， 分別有吸氣閥1 6及排氣閥1 7被設成自由開閉（參照第2圖 (5) (5)200424425 然後，鄰接在吸氣閥16及排氣閥17的頂端’被配置有 凸輪軸18。該凸輪軸18的一端部（在第1圖’第4圖爲左端 部）。係經由凸輪軸軸承1 9 a ’被缸頭4和凸輪軸座2 0挾住 自由旋轉地軸支，另一端部（在第1圖，第4圖爲右端）’ 係經由凸輪軸軸承1 9 b，在缸頭4被軸支成自由旋轉。在凸 輪軸18的上述一端部，有從動鏈輪21和磁鐵座22被依次重 疊而以螺栓23被一體地安裝。一方面在曲柄軸9有驅動鏈 輪24被一體地設置，在該驅動鏈輪24和上述從動鏈輪21被 架裝有循環式的凸輪鏈條2 5。 並且如第2圖所示，在吸氣閥1 6及排氣閥1 7的頂部和 凸輪軸1 8之上方的中間，分別有1對搖臂軸26，使軸線成 水平被配置，皆係兩端被嵌合在缸頭4和凸輪軸座20。在 此等1對搖臂軸2 6，分別有搖臂2 8被樞支成可自由搖動。 然後在其搖臂28的一端被樞支安裝有滾輪29而抵接在前述 凸輪軸1 8之凸輪山1 8 a，並且另一端係分別抵接在吸氣閥 1 6，排氣閥1 7的頂部。如此地在內燃機1之運轉時，將以 曲柄軸9的一半之旋轉速度。凸輪軸1 8被旋轉驅動，吸氣 閥1 6和排氣閥1 7。將在曲柄軸9每2轉時，成爲分別被各1 次地開閉驅動。 並且如在第1圖及第4圖所示，在凸輪軸18的一端（圖 之左端）被一體地安裝的前述磁鐵座2 2，在位於從動鏈輪 2 1之內徑側的位置處’係被形成小徑之圓筒狀，更且在其 外方處係被形成大徑的圓筒狀。然後在其大徑圓筒狀部之 -8- (6) (6)200424425 內周面，經周方向等間隔地多數的永久磁鐵35被一體地安 裝。 更且，在凸輪軸18之外方（在第1圖及第4圖的左方） 被配設有冷卻水泵3 0。該冷卻水栗3 〇之栗蓋3 1被嵌裝在缸 頭4的側壁所形成之開口’在該栗盍3 1有栗體3 2的基端被 緊密地嵌合。其泵體3 2之圓筒狀部’係被形成對磁鐵座2 2 的大徑圓筒狀部存有一定之間隔。並且在凸輪軸1 8的旋轉 軸線上被配置泵軸3 3，其兩端被自由旋轉地嵌合在泵蓋31 和泵體32。在該泵軸33被著嵌有轉子34’在其轉子34的圓 筒狀部，相對於在前述磁鐵座2 2被一體地安裝的永久磁鐵 3 5之位置，被一體地安裝有永久磁鐵3 6。並且位於比轉子 34的圓筒狀部外方（第4圖之左方），有葉片37被一體地 形成。如此地從動鏈輪2 1被旋轉驅動時’與此一體的磁鐵 座22將會旋轉，在冷卻水泵30之轉子34—體地被安裝的永 久磁鐵36，將由和磁鐵座22—起旋轉之永久磁鐵35的磁力 跟著旋轉，而冷卻水泵3 0將被旋轉驅動。 接著第5圖係把缸頭蓋5拆卸而將缸頭4從上方觀察之 圖，第6圖爲第5圖的VI— VI端視斷面圖，第7圖爲第4圖， 第6圖之VII— VII端視斷面圖。 在本實施例’係在1對搖臂軸26的一端部（在第5圖爲 左端’而在第7圖爲下端）被形成有互相對面之缺口部26a 。然後在此等缺口部2 6 a之間，如第6圖所示地，從凸輪軸 18方向觀察的斷面平平行（在第6圖係爲朝下方越來越窄 的錐狀體）之標置板4 0，做爲限制構件從上方被插入。該 (7) (7)200424425 標置板40，係如第4圖及第6圖所示，下端係抵接在凸輪軸 軸承1 9 a的外環外側面，並且上部係向水平折曲而向缸頭4 內之凸部的凸輪軸座20之上方延伸，再向下方折曲，成爲 挾入其凸輪軸座20的形狀。而且，在標置板40和凸輪軸座 20之間，及標置板40和缸頭蓋5內面之間，被配置有例如 橡膠的彈性構件42，而由缸頭蓋5被推壓。再者，第6圖中 之一點鏈線42A，係表示彈性構件42的自由時形狀，把缸 頭蓋5安裝時將會被推壓，而成爲第4圖所示之形狀。並且 ，第5圖及第7圖中的圖號27，係爲了使搖臂軸28之軸方向 位置不偏位而被配設的軸環。 在如此的內燃機1，在被供給燃燒室1 3之燃料。空氣 混合氣點火時，燃料將會燃燒而燃燒室1 3的壓力將上升， 而把活塞8壓低。由於使吸氣閥1 6及排氣閥1 7動作，而以 所定的順序、時序反覆進行供排氣和點火，活塞8將往復 動。活塞8之此運動將經由連桿i 2變成曲柄軸9的旋轉，更 被傳送至未圖示之車輪等。曲柄軸9的旋轉，將再經由驅 動鏈輪24，凸輪鏈條25，從動鏈輪21被傳送給凸輪軸18， 更經由凸輪山1 8 a，搖臂2 8，將前述吸氣閥1 6，排氣閥1 7 以所定的順序·時序開關。 在本實施例，將在1對搖臂軸26之一端部形成互相相 對的缺口部2 6 a，在此等缺口部2 6 a之間把從凸輪軸1 8方向 觀察的斷面不平行（爲錐狀體）之標置板4 0插入，同時將 該標置板4 0以缸頭蓋5兩面推壓故能使搖臂軸2 6和標置板 40互相不搖幌地密接而固定。因此能夠防止搖臂軸26的鬆 -10- (8) 200424425 動轉動之雜音的發生和軸承之磨損。並且將由缸頭蓋5把 標置板40推壓而固定，能夠省略在傳統之搖臂軸的止轉裝 置需要之標置板的鎖緊螺栓，螺孔加工工程，鎖緊工程， 在成本面也將成爲有利。200424425 0) 玖. Description of the invention [Technical field to which the invention belongs] The present invention relates to a non-rotation device for a rocker shaft of a valve device of an internal combustion engine. [Prior Art] In the past, a stopper for preventing the rocker shaft from being pressed into the rocker shaft hole has been disclosed (for example, refer to Patent Document 1). There is also a rotation stop device for the swing arm shaft as shown in FIG. 8. In this system, the central part of the standard plate 0 4 0 is fixed to the cylinder head 0 4 between the two rocker shafts 0 2 and 6 and the bolt 0 2 3 is screwed, and it will be around the standard plate 0 4 0 Rotary stop portions 040 a are symmetrically formed on the lower ends of the both end portions of the arm portions and abut on the notch portions 026 a of the two rocker arm shafts 026, and these rocker arm shafts 026 are stopped from rotating. It should be noted that the drawing number 〇18 in FIG. 8 indicates a camshaft, and 〇19 indicates a camshaft bearing. [Patent Document 1] Japanese Patent Laid-Open No. 2000-329002 (paragraph 0041, FIG. 6 and FIG. 7) [Summary of the Problem] [Problems to be Solved] In the past, the anti-rotation device of the rocker shaft is a standard Set plate 〇 4 0 with lock bolt 02 3 When tightening, because the standard plate 〇 40 will rotate in its locking direction, it will be shaken at one of the rear sides (left side in Figure 8) of the locking rotation direction. (2) (2) 200424425 Some gap S is generated between the notch portion 026a of the arm shaft 026 and the rotation stop portion 040a of the standard plate 040. Therefore, during the operation of the internal combustion engine, there is a problem that noise occurs due to the loose rotation of the rocker shaft 026 in the gap s. [Means and Effects to Solve the Problems] In order to solve the above-mentioned problems in the past, the first invention in the scope of patent application is to arrange a pair of rocker shafts at a distance from each other in the head of an internal combustion engine, to suck and exhaust A pair of rocker shafts connected to the cam and the suction / exhaust valve are supported by the rocker shafts to form a valve device for an internal combustion engine capable of swinging, and a notch is formed in each part of the pair of rocker shafts. Between these notches, a restricting member with a non-parallel cross-section viewed from the direction of the camshaft is inserted, and a rotation stop device of the rocker shaft is characterized by pushing the restricting member from the inner surface of the cylinder head cover. The invention according to the first scope of the patent application is structured as described above. Between the notch portions of the rocker shaft facing each other, a restriction member whose cross-section viewed from the cam axis direction is not parallel is inserted. The inner surface of the head cover is piled up, so that the rocker arm shaft and the restricting member can be tightly fixed without being oscillated. Therefore, it is possible to prevent the occurrence of noise caused by the loose rotation of the rocker shaft and the wear of the bearing. In addition, since the restricting member is pushed and fixed by the cylinder head cover, the locking bolts, screw hole processing processes and locking processes of the restricting members required by the conventional rocker shaft anti-rotation device can be omitted. advantageous. Then, the invention of the second scope of the patent application is the invention of the first scope of the patent application, characterized in that the restricting member is formed into a shape in which the convex portion in the cylinder head is driven in the cam axis direction. In this way, the invention in item 2 of the scope of patent application restricts the camshaft position of the restricting member in the shape of the convex portion in the cylinder head -5- (3) (3) 200424425, and can prevent the rocking Wear caused by misalignment of the arm axis. In addition, since the restricting member is fixed with the existing convex portion, no special processing is required on the cylinder head side, and the position can be fixed. Then, the invention of the third scope of the patent application is the invention of the second scope of the patent application, which is characterized in that it is arranged between the restriction member and the inner surface of the cylinder head cover, and between the restriction member and the convex portion. Elastic member.发明 In the invention described in the third item of the patent application, the restriction member is fixed by the elastic member, so the restriction member can be fixed surely. In addition, the vibration of the cylinder head cover is absorbed by the elastic member, so the noise caused by the vibration is reduced. In addition, the invention of the fourth scope of the patent application is the invention of one of the second or third scope of the aforementioned patent scope, wherein the convex portion is a camshaft seat, and the limiting member is abutted on the camshaft. Features the outer side of the bearing. Φ When the invention according to item 4 of the scope of patent application is applied in this way, the restricting member will be fixed at the cam seat position, and the position of the camshaft bearing will also be fixed, so the sloshing situation of the camshaft bearing will disappear, and the camshaft bearing will be improved Of durability. [Embodiment] [Embodiment of the invention] Fig. 1 is a longitudinal section of an internal combustion engine to which an embodiment of the present invention is applied, which is cut in a plane through the crank axis and the cylinder axis. A sectional view, FIG. 2 is a longitudinal sectional view cut along a plane orthogonal to the crank axis slightly passing through the cylinder axis, and FIG. 3 is a plane cut orthogonal to the crank axis near the cam chain. The longitudinal sectional view of FIG. 4 is a view in which the upper part of FIG. 1 is enlarged and displayed. The internal combustion engine 1, a head valve type 4-stroke cycle single-cylinder internal combustion engine, is composed of a left and right divided left crank case 2a, a right crank case 2b, and a cylinder block 3, and a cylinder head 4, and a cylinder head cover 5, and The left crank case cover 6 a and the right crank case cover 6 b are formed. The left crank case 2a and the right crank case 2b are combined with each other, and the cylinder block 3, the cylinder head 4, and the cylinder head cover 5 are sequentially superimposed thereon. A left crank case cover 6a is provided on the left side of the left crank case 2a, and a right crank case cover 6b is provided on the right side of the right crank case 2b. Then, the left and right crank cases 2a, 2b, the cylinder block 3, the cylinder head 4, the cylinder head cover 5, the left crank case cover 6a, and the right crank case cover 6b will be integrated with each other by bolts or the like. In addition, as shown in FIG. 1 and FIG. 2, the cylinder hole 7 formed in the cylinder block 3 and the piston 8 will be slidably fitted. At the same time, the crank shafts 2 a and 2 b on the left and right side will be cranked. The support is rotatable. Then, the piston 8 and the crankshaft 9 are pivotally mounted on both ends of the connecting rod 12 through the piston pin 10 and the crank pin 11 respectively so as to be rotatable. In this way, when the piston 8 is reciprocated by the combustion of the air-fuel mixture in the combustion chamber 13 at the top of the cylinder hole 7, the crank shaft 9 will be rotationally driven. In addition, an intake port 14 and an exhaust port which communicate with the combustion chamber 13 at the top of the cylinder hole 7 are formed in the cylinder head 4, and the intake port 14 and the exhaust port 15 respectively have suction ports. The air valve 16 and the exhaust valve 17 are opened and closed freely (refer to FIG. 2 (5) and (5) 200424425). Then, a camshaft 18 is disposed adjacent to the top ends of the intake valve 16 and the exhaust valve 17. One end of the camshaft 18 (the left end in FIG. 1 and FIG. 4). The camshaft 4 and the camshaft holder 20 hold the freely rotatable shaft support via a camshaft bearing 19a ', and the other end (The first end and the fourth end are at the right end.) 'It is supported by the cylinder head 4 through camshaft bearings 1 9 b for free rotation. At the one end of the camshaft 18, there is a driven sprocket 21 and a magnet. The seat 22 is sequentially overlapped and integrally mounted with bolts 23. On the one hand, a driving sprocket 24 is integrally provided on the crank shaft 9, and the driving sprocket 24 and the driven sprocket 21 are mounted in a circulating manner. The cam chain 25. As shown in FIG. 2, there are a pair of rocker shafts 26 at the top of the intake valve 16 and the exhaust valve 17 and above the cam shaft 18, respectively. They are arranged horizontally, and both ends are fitted to the cylinder head 4 and the camshaft seat 20. Here, a pair of rocker shafts 2 6 and a rocker arm 2 8 are pivoted to be freely swingable. One end of the rocker arm 28 is pivotally mounted with a roller 29 to abut the cam mountain 18 a of the aforementioned camshaft 18, and the other ends are respectively abutted on the top of the intake valve 16 and the exhaust valve 17. In this way, when the internal combustion engine 1 is running, it will be rotated at half the rotational speed of the crankshaft 9. The camshaft 18 is rotationally driven, and the intake valve 16 and the exhaust valve 17 will be rotated every two revolutions of the crankshaft 9, As shown in FIGS. 1 and 4, the magnet holder 22 is integrally mounted on one end (the left end in the figure) of the camshaft 18 and is located on the driven chain. The position of the inner diameter side of the wheel 21 is formed into a cylindrical shape with a small diameter, and is further formed into a cylindrical shape with a large diameter at its outer side. -(6) (6) 200424425 On the inner peripheral surface, a large number of permanent magnets 35 which are equally spaced in the circumferential direction are integrally mounted. Furthermore, outside the camshaft 18 (in Figs. 1 and 4) (Left) A cooling water pump 30 is provided. The cooling water pump 30 has a pump cap 3 1 which is embedded in the side wall of the cylinder head 4 and has a pump body 3 2 at the base. The ends are tightly fitted. The cylindrical portion 'of the pump body 32 is formed to have a certain distance from the large-diameter cylindrical portion of the magnet holder 22, and is arranged on the rotation axis of the camshaft 18. A pump shaft 33 is arranged, and both ends of the pump shaft 33 are rotatably fitted to the pump cover 31 and the pump body 32. A rotor 34 'is fitted in the pump shaft 33 to a cylindrical portion of the rotor 34, as compared with the above. The permanent magnets 35 are integrally attached to the magnet holder 22, and the permanent magnets 36 are integrally attached. Further, the blade 37 is formed outside the cylindrical portion of the rotor 34 (to the left of Fig. 4), and the blade 37 is integrally formed. When the driven sprocket 21 is rotated in this way, the integrated magnet holder 22 will rotate, and the permanent magnet 36 installed integrally with the rotor 34 of the cooling water pump 30 will rotate from the magnet holder 22. The magnetic force of the permanent magnet 35 is rotated, and the cooling water pump 30 is rotationally driven. Next, FIG. 5 is a view in which the cylinder head cover 5 is removed and the cylinder head 4 is viewed from above. FIG. 6 is a cross-sectional view of the VI-VI end of FIG. 5, and FIG. 7 is a view of FIG. 4 and FIG. VII—Section VII end view. In this embodiment, a pair of rocker shafts 26 (left end in FIG. 5 and lower end in FIG. 7) are formed at one end portion of each pair of rocker shafts 26, and a notch portion 26a facing each other is formed. Between these notches 2 6 a, as shown in FIG. 6, the cross section viewed from the direction of the camshaft 18 is parallel to each other (in FIG. 6, it is a tapered body that is narrowing downwards). The setting plate 40 is inserted as a restriction member from above. The (7) (7) 200424425 standard plate 40 is shown in Fig. 4 and Fig. 6. The lower end is in contact with the outer surface of the outer ring of the camshaft bearing 19a, and the upper part is bent horizontally. The camshaft base 20 extends upward above the convex portion in the cylinder head 4 and is bent downward to form a shape that is inserted into the camshaft base 20. Further, between the setting plate 40 and the camshaft seat 20, and between the setting plate 40 and the inner surface of the cylinder head cover 5, an elastic member 42 such as rubber is arranged, and the cylinder head cover 5 is pressed. In addition, a point chain line 42A in FIG. 6 indicates the free-time shape of the elastic member 42. When the cylinder head cover 5 is mounted, it will be pushed into the shape shown in FIG. In addition, reference numeral 27 in Figs. 5 and 7 is a collar provided to prevent the position of the rocker shaft 28 in the axial direction from being deviated. In such an internal combustion engine 1, fuel is supplied to a combustion chamber 13. When the air mixture is ignited, the fuel will burn and the pressure in the combustion chamber 13 will rise, pushing the piston 8 down. Since the intake valve 16 and the exhaust valve 17 are operated, the supply and exhaust and ignition are repeatedly performed in a predetermined sequence and timing, and the piston 8 reciprocates. This movement of the piston 8 becomes a rotation of the crank shaft 9 via the connecting rod i 2 and is transmitted to a wheel or the like (not shown). The rotation of the crank shaft 9 will be transmitted to the cam shaft 18 via the driving sprocket 24, the cam chain 25, and the driven sprocket 21, and further via the cam mountain 1 8a, the rocker arm 2 8 and the aforementioned suction valve 1 6 The exhaust valve 17 opens and closes in a predetermined sequence and timing. In this embodiment, a pair of rocker shafts 26 at one end portion is formed with a notch portion 2 6 a opposite to each other, and the cross-sections viewed from the cam shaft 18 direction are not parallel between the notch portions 2 6 a ( It is a cone-shaped body) and inserts the target plate 40, and simultaneously pushes the target plate 40 on both sides of the cylinder head cover 5, so that the rocker shaft 26 and the target plate 40 can be tightly fixed to each other without swinging. Therefore, it is possible to prevent the looseness of the rocker shaft 26 -10- (8) 200424425 from the occurrence of moving noise and bearing wear. In addition, the cylinder head cover 5 pushes and fixes the setting plate 40, which can omit the locking bolts, screw hole processing works, and locking works of the setting plate required in the conventional anti-rotation device of the rocker shaft. Will become favorable.
在本實施例，並且標置板40成爲挾入凸輪軸座20之狀 ，將限制標置板40的凸輪軸18方向位置，由搖臂軸26的軸 方向之偏位的磨損也將被防止。而且，將標置板40用已有 之凸輪軸座20固定，能夠不需要在缸頭4側施以特別的加 工，而將位置固定。 並且在本實施例，因在標置板40與凸輪軸座20之及， 及標置板4 0與缸頭蓋5內面之間，配置有如橡膠的彈性構 件42，故能確實固定標置板40。而且，缸頭蓋5之振動將 由彈性構件42將被吸收，振動所產生的噪音將被減低。In this embodiment, the positioning plate 40 is inserted into the camshaft seat 20, which will limit the position of the camshaft 18 in the positioning plate 40, and the wear caused by the deflection in the axial direction of the rocker shaft 26 will be prevented. . Furthermore, the positioning plate 40 can be fixed by the existing camshaft base 20, and the position can be fixed without performing special processing on the cylinder head 4 side. And in this embodiment, since the elastic plate 42 such as rubber is arranged between the standard plate 40 and the camshaft seat 20, and between the standard plate 40 and the inner surface of the cylinder head cover 5, the standard plate can be reliably fixed. 40. Moreover, the vibration of the cylinder head 5 will be absorbed by the elastic member 42, and the noise generated by the vibration will be reduced.
更且在本實施例，因標置板40之下抵接在凸輪軸軸承 19 a的外環外側面，凸輪軸軸承19a將無搖幌，而會提高耐 久性。 【圖式簡單說明】 〔第1圖〕第1圖係將適用本發明的一實施例之內燃機 在略通過曲柄線與缸軸線的平面切斷之縱斷面圖。 〔第2圖〕第2圖係同樣地在略通過缸軸線和曲柄軸線 正交的平面切斷之縱斷面圖。 〔第3圖〕係同樣地在凸輪鏈附近與曲柄軸線正交的 平面切斷之縱斷面圖。 -11 - (9)200424425 〔第4圖〕第4圖係將第1圖的上部擴大顯示之圖。 之圖 〔第5圖〕第5圖係將缸頭蓋拆卸而把缸頭從上方觀察 〇 〔第6圖〕第6圖係第5圖之VI — VI端視斷面圖。 〔第7圖〕第7圖係第4圖，第6圖之VII — VII端視斷面 圖。 第8圖〕第8圖係顯示過去的搖臂軸之止轉裝置的一 例之圖 主要元件對照表〕 1 內 燃 機 2 a 左 曲 柄 箱 2b 右 曲 柄 箱 3 氣 缸 塊 4 氣 缸 頭 5 氣 缸 頭 蓋 6a 左 曲 柄 箱 6b 右 曲 柄 箱 7 氣 缸 孔 8 活 塞 9 曲 柄 軸 10 活 塞 銷 11 曲柄 銷 12 連 桿 -12- (10)200424425 13 燃燒室 14 吸氣口 15 排氣口 16 吸氣閥 17 排氣閥 18 凸輪軸 1 8 a凸輪山Furthermore, in this embodiment, since the underside of the standard plate 40 abuts on the outer side surface of the outer ring of the camshaft bearing 19a, the camshaft bearing 19a has no wobble, and durability is improved. [Brief description of the drawings] [Fig. 1] Fig. 1 is a longitudinal sectional view of an internal combustion engine to which an embodiment of the present invention is applied, which is cut along a plane slightly passing through a crank line and a cylinder axis. [Fig. 2] Fig. 2 is a longitudinal sectional view similarly cut along a plane slightly passing through a cylinder axis and a crank axis orthogonal to each other. [Fig. 3] It is a longitudinal cross-sectional view of a plane cut in the vicinity of the cam chain, which is orthogonal to the crank axis. -11-(9) 200424425 [Fig. 4] Fig. 4 is an enlarged view of the upper part of Fig. 1. [Fig. 5] Fig. 5 is a sectional view of the VI-VI end of Fig. 5 when the cylinder head is removed and the cylinder head is viewed from above. [Fig. 6] [Fig. 7] Fig. 7 is a sectional view of Fig. 4 and Fig. 6 taken along the line VII-VII. Fig. 8] Fig. 8 is a diagram showing an example of a conventional anti-rotation device of a rocker shaft. A comparison table of main components] 1 Internal combustion engine 2 a Left crank case 2b Right crank case 3 Cylinder block 4 Cylinder head 5 Cylinder head cover 6a Left crank Box 6b Right crank box 7 Cylinder bore 8 Piston 9 Crankshaft 10 Piston pin 11 Crank pin 12 Connecting rod -12- (10) 200424425 13 Combustion chamber 14 Suction port 15 Exhaust port 16 Suction valve 17 Exhaust valve 18 Cam Shaft 1 8 a cam mountain
1 9 a、1 9 b 凸輪軸軸承 2 0 凸輪軸座 21 從動鏈輪 22 磁鐵座 23 螺栓 2 4 驅動鍵輪 25 凸輪鏈 26 搖臂軸1 9 a, 1 9 b Camshaft bearing 2 0 Camshaft seat 21 Driven sprocket 22 Magnet seat 23 Bolt 2 4 Drive key wheel 25 Cam chain 26 Rocker shaft
2 6a缺口部 28 搖臂 29 滾輪 30 冷卻水泵 3 1 泵蓋 32 泵體 3 3 泵軸 34 轉子 3 5、3 6 永久磁鐵 -13- (11)200424425 37 葉片 40 標置板 42 彈性構件2 6a Notch 28 Rocker 29 Roller 30 Cooling water pump 3 1 Pump cover 32 Pump body 3 3 Pump shaft 34 Rotor 3 5, 3 6 Permanent magnet -13- (11) 200424425 37 Blade 40 Standard plate 42 Elastic member
-14--14-