1288205 九、發明說明： 【發明所屬之技術領域】 本發明係提供一種裝置於小引擎設備之油箱口上的油 氣轉接器，尤其是涉及一種將油箱内揮發的油氣導引至小 引擎的揮發油氣控制系統(EEC)内的技術。 【先前技術】 一般所稱之小引擎，是指輸出馬力在25HP(19Kw)以下 的引擎發動機而言。構裝於此種小引擎周邊之油箱口上的 傳統油箱蓋，僅有開啟或關閉油箱口的簡易功能，並且只 在油箱蓋表面留設一逃氣孔，以避免油箱因為揮發油氣壓 力的變化過大而產生變形或爆裂的危險。且知，該等油箱 口的油箱蓋，會因為逃氣孔而使油氣不斷的揮發、逸散至 大氣中，除了嚴重污染空氣外，同時也造成油料的無謂浪 費，為其缺點所在。 為了克服上述傳統油箱蓋設計不良的問題，坊間也已 存在另一種可調整上述逃氣孔開闔時機的改良式油箱蓋， 它可以依據油箱内壓力的大或小而控制逃氣孔的開啟或閉 闔，以維持一定的油箱内壓力；惟，此款油箱蓋雖可減少 油氣揮發，但卻仍然是將揮發油氣直接引導逸散至大氣 中’故仍然造成危害環境及無謂耗損油氣的缺點。再者， 諸如此類利用壓差閥控制油氣開啟或閉闔通道的油箱蓋鈐 構，其組配構件的數量也相對的過於繁雜，故在降低產製 成本以及故障機率上已喪失了先決條件。 此外’在環保意識及其法規日漸嚴苛的要求丁，坊間 小引擎設備之油箱内揮發的油氣已不能夠再排放至大氣^ !2882〇5 影響環境空氣品質，因此在汽車上已普遍安裝使用的揮發 ’由氣控制系統(EEC)，也逐漸的被要求安裝使用在小引擎的 周邊設備上，使油箱必須改採密閉設計，並利用揮發油氣 控制系統(EEC)而將油箱内揮發的油氣回收導引至及引擎供 油系統内再利用。基於此因，坊間也有業者將小引擎設備 的油箱重新開模設計成具有油氣回收管道的構裝形式，以 利將油箱内的油氣導引至揮發油氣控制系統(EEC)内，並且 在油相口處鎖組密閉式油箱蓋，以避免油氣對外溢散。惟， 卻存在著必須重新開模或修改油箱模具的問題，且只能針 對新出廠的小引擎設備裝配此一具有油氣回收能力的新款 /由鈿，對於已使用於市面上且具既定規格的小引擎油箱， 將面臨非要更換整個油箱否則難以改裝的困境，同時也存 在著變更油箱設計後必須重新開模或修模的耗費成本問 題’故亦非絕佳的選擇。 【發明内容】 針對上述先前技術上的問題及困擾，本發明人特以其 多年專業從業經驗，在不變更油箱既有規格的前提下，改 良加油蓋的構裝設計，以克服上述問題及困擾。是以， 本發明之目的旨在不變更油箱既有規格的前提下，提 供一種可直接裝置於小引擎設備之油箱口上的油氣轉接 器’且可以依據相異油箱口孔徑與固接油箱蓋的規格模式 而設計成合適裝配使用的轉接器，故可避免變更油箱設計 等需耗資開模或修模的問題，也能夠立即裝配使用於市面 上現有既定規格的小引擎設備的油箱口上，以達經濟實惠 的換裝效益者。 6 1288205 為達上述目的，本發明之油氣轉接器上形成有利於旋 奴或塞組氣密式油箱蓋的加油孔，同時油氣轉接器上一體 延製形成至少一油氣接管，以便將油箱内的油氣導引至揮 發油氣控制系統(EEC)内，回收供應引擎再利用； 同時，本發明之油氣轉接器内至少形成有一副氣室， 使油箱内油液面以上的膨脹氣室能夠透過上述油氣接管而 與引擎的揮發油氣控制系統(EEC)之間構成順暢的油氣供 應通路。 此外，本發明之油氣轉接器底端並延製出具有一特定 高度的凸管部，係與加油孔相連通，且能探伸至油箱内， 此凸管部能與油箱内壁間圍繞形成一利於油氣揮發集結的 膨服氣室，特別是當油箱内注滿油料時，凸管部可以使膨 脹氣室内集結的油氣形成内壓，避免油箱内形成真空狀態。 再者，本發明除搭配使用的油箱、油箱蓋及銜接使用 的傳統揮發油氣控制系統(EEC)以外，其餘涉及油氣轉接器 上的各個特徵部位，均是一體延製成型，因此已將產製及 組裝成本降至最低，且浙祕新、舊款油箱規格裝配使 用’故已備具高度利用性。 實施圖例，請 為能再加詳述本創作，併予列舉出較佳 配合實施方式說明如后： 【實施方式】 =朗—所示，林發明提供利於裝設於既有油箱」 之油相口 31上的油氣轉接器2。其中： 3，=^33’市面上既有鱗規格補規格的油箱 且為相3上必定具有一油箱σ 31，在傳統用途上，該 1288205 筌:田疋作為加油孔使用，也用來塞設或旋組傳統油箱 因此油箱Π 31的外壁（内壁亦可)上延製形成有外 牙程36,利於傳統具内牙_油㈣相鎖接(如圖—所示）， 但^此之外’該油箱口 31上的外牙程％也可以是形成在 ^箱口内壁上的内牙程、内壁或外壁上的凸肋卡槽或卡 %等利於和傳統油箱蓋上固接部位相搭配鎖接或扣持的部 位。然而在本發明中，是利用該油箱口 31上的外牙程％ 來固接油氣轉接器2。 該油器轉接器2係為一體延製成型的器體，具有一内 筒體24,内筒體24中心作為加油孔29使用，足;;供加油 搶管植入孔内，將油料注入油箱3中，且該加油孔29頂端 周圍孔壁上形成有内牙28,用以鎖裝具外牙1〇的油箱蓋 1此一内牙28及外牙10也可以實施成其它利於相對扣接 的凸肋、卡槽或卡環等形態，使油箱蓋i能氣密封閉住加 油孔29 ; 上述内筒體24的頂部延製有一法蘭23,並在該法蘭 23的一端延製有至少一凸伸之接管22及另一内置相連的導 引孔21，且該法蘭23的外端部向下延製出一軸向的外筒體 25，使内筒體24與外筒體25之間形成一副氣室20 ; 上述外筒體25的内壁上延製形成有内牙程26，利於和 上述油箱口 31的外牙程36相固接，使油器轉接器2得以 便利的鎖組於上述油箱口 31上(如圖二所示）；此外，當油 箱口 31的外牙程36變更為凸肋、卡槽或卡環時，該内牙 程26也可以製成利於相對鎖接或扣持的形態，或者採用超 音波溶接、旋轉溶接、振動熔接、高週波炼接或熱板、熔接 1288205 等方式，將外筒體25的内壁固定在油箱口 μ上，亦是本 發明所思及的實施方案； 上述副氣至20可連通導引孔21與接管22，且上述接 管22可藉由導管連接至一揮發油氣控制系統(eec)内，使 油箱3内的油氣能透過導引孔21與接管22而與揮發油氣控 制系統(EEC)之間構成順暢的油氣供應通路； 上述内筒體24底端延製有一凸管部27，穿探至油箱3 内，凸管部27並在油箱3内與其頂壁33之間保有一特定 鬲度h(如圖二所示）’且與上述加油孔29相連通；凸管部 27可與油箱3内壁間圍繞形成一利於油氣揮發集結的膨脹 氣至30 ’特別是當油箱3内注滿油料時，油液面34上方即 被凸管部27與油箱3内壁框圍形成一膨脹氣室3〇(如圖三 所示）’在膨脹氣室30内的油氣便會集結而形成一膨脹内 壓，避免油箱内隨著油料之消耗而造成真空變形現象；因 此，油器轉接器2底端的凸管部27凸伸至油箱3内的特定 高度h距離，可以決定出膨脹氣室3〇的容積大小、油液面 的滿载高度、以及油箱内可裝填油量的容積。 據此，便可將油箱3内揮發至膨脹氣室3〇的及副氣室 ，32的油氣經.由導引孔21及接管22輸送至引擎的揮發油 ，控制系統(EEC)内，以維持油箱3内壓之穩並解決油 氣外洩所造成的環保問題，同時減少油料％浪費。 w ^合上述實施例之說明，相信已詳加揭示本發明的技 =架構及可供實施的高度利_，但本發明之技術並不局 =此，舉凡依據上述以及后述巾請專利範圍等内容而作 θ略修飾的等效技術均應隸屬於本發明用範•，並予陳 1288205 明。 【圖式簡單說明】 圖一：揭示本發明整體裝置環境之立體分解圖，說明 一油氣轉接器可鎖裝於油箱口上，且油箱蓋可裝設於油氣 轉接器的中心加油孔上。 圖二：揭示本發明之構造剖示圖，說明將油氣轉接器 組裝於油箱口上並塞組油箱蓋後的結構組置形態。 圖三：揭示本發明之剖示狀態圖，說明油箱内之油液 面上方形成有一膨脹氣室，可連通另一副氣室並透過導引 孔及接管傳送至引擎的揮發油氣控制系統内的狀態。 【主要元件符號說明】 1… --油相蓋 10… …外牙 2… —轉接器 20— …副氣室 21- ---導引孔 22- …接管 23- —-法蘭 24- ---内筒體 25- —-外筒體 26— ·--内牙程 27- 凸管部 28— 内牙 29- ---力〇 ί由孑L h… —特疋南度 3… —油箱 31… --油箱口 30- …膨脹氣室 33… 頂壁 34— ---油液面 35— 油料 36— ---外牙程1288205 IX. Description of the Invention: [Technical Field] The present invention provides an oil and gas adapter installed on a fuel tank port of a small engine device, and more particularly to a volatile oil and gas that directs oil and gas volatilized in a fuel tank to a small engine Technology within the Control System (EEC). [Prior Art] The small engine generally referred to is an engine engine that outputs horsepower below 25 HP (19 Kw). The traditional fuel tank cap constructed on the port of the fuel tank around the small engine has only a simple function of opening or closing the tank port, and only an escape hole is left on the surface of the fuel tank cap to prevent the fuel tank from being excessively changed due to the volatile oil pressure. Risk of deformation or bursting. It is also known that the fuel tank caps of these tanks will cause the oil and gas to volatilize and escape into the atmosphere due to the escape holes. In addition to severely polluting the air, it also causes unnecessary waste of fuel, which is a disadvantage. In order to overcome the problem of poor design of the conventional fuel tank cap, there is another improved fuel tank cap that can adjust the timing of the above-mentioned escape hole opening, which can control the opening or closing of the escape hole according to the pressure in the fuel tank. In order to maintain a certain pressure in the fuel tank; however, although this fuel tank cap can reduce the evaporation of oil and gas, it still directly directs the volatile oil and gas to the atmosphere, which still causes the harm to the environment and the unnecessary consumption of oil and gas. Moreover, such a fuel tank cap structure that utilizes a differential pressure valve to control the opening or closing of the oil and gas, the number of assembly members is also relatively complicated, and thus the prerequisites for reducing the production cost and the probability of failure have been lost. In addition, 'the environmental awareness and the increasingly stringent requirements of the regulations, the oil and gas volatilized in the fuel tank of the small engine equipment can no longer be discharged to the atmosphere. ^ 2882 〇 5 affects the ambient air quality, so it has been widely installed and used in automobiles. The Volatile 'Gas Control System (EEC) is also gradually required to be installed on the peripheral equipment of the small engine, so that the fuel tank must be changed to a closed design, and the volatile oil and gas control system (EEC) is used to volatilize the oil and gas in the fuel tank. Recycling is directed to and reused in the engine fuel supply system. Based on this reason, some manufacturers have re-opened the fuel tank of the small engine equipment to have the structure of the oil and gas recovery pipeline to guide the oil and gas in the fuel tank to the volatile oil and gas control system (EEC), and in the oil phase. The closed tank cap is locked at the mouth to avoid oil spillage. However, there is a problem that the mold of the fuel tank must be re-opened or modified, and this new type of small engine equipment can only be equipped with this new type of oil/gas recovery capability, which is used in the market and has a predetermined specification. The small engine fuel tank will face the dilemma that it is necessary to replace the entire fuel tank or it is difficult to modify. At the same time, there is also a costly problem of having to re-open or repair the mold after changing the fuel tank design. Therefore, it is not an excellent choice. SUMMARY OF THE INVENTION In view of the above-mentioned problems and problems of the prior art, the inventors have improved their construction design of the fueling cap to overcome the above problems and problems without changing the existing specifications of the fuel tank. . Therefore, the object of the present invention is to provide an oil and gas adapter that can be directly mounted on the tank port of a small engine device without changing the existing specifications of the fuel tank, and can be based on the aperture of the dissimilar fuel tank port and the fixed fuel tank cap. The specification mode is designed as an adapter for proper assembly, so that it is possible to avoid the problem of costly opening or repairing the fuel tank design, and it can be immediately assembled on the fuel tank port of the small engine equipment of the existing specifications available on the market. In order to achieve economical replacement benefits. 6 1288205 In order to achieve the above object, the oil and gas adapter of the present invention forms a fueling hole for facilitating the spin-off or plug-in gas-tight fuel tank cap, and at the same time, the oil and gas adapter integrally extends to form at least one oil and gas nozzle for the fuel tank The internal oil and gas is guided into the volatile oil and gas control system (EEC), and the recovery supply engine is reused. Meanwhile, at least one auxiliary air chamber is formed in the oil and gas adapter of the present invention, so that the expansion chamber above the oil level in the oil tank can A smooth oil and gas supply path is formed between the above-mentioned oil and gas take-over and the engine's volatile oil and gas control system (EEC). In addition, the bottom end of the oil and gas adapter of the present invention extends a convex tube portion having a specific height, which is connected to the oiling hole and can be probed into the oil tank, and the convex tube portion can be formed around the inner wall of the oil tank. The expansion chamber for facilitating the accumulation of oil and gas, especially when the fuel tank is filled with oil, the convex tube portion can form an internal pressure of the oil and gas accumulated in the expansion gas chamber to avoid a vacuum state in the oil tank. Furthermore, in addition to the fuel tank, the fuel tank cap and the conventional volatile oil and gas control system (EEC) used in conjunction with the present invention, the various feature parts involved in the oil and gas adapter are integrally formed, and thus The production and assembly costs are minimized, and the new and old fuel tank specifications of Zhe Mi are assembled and used. For the implementation of the illustration, please elaborate on this creation, and give a description of the preferred implementation of the following: [Embodiment] =Lang-show, Lin invention provides oil phase for installation in the existing fuel tank" Oil and gas adapter 2 on port 31. Among them: 3,=^33' There are both fuel tanks with scale specifications and a tank σ 31 for phase 3. In traditional use, the 1288205 筌: 疋 is used as a fuel hole and is also used for plugging. The conventional fuel tank is set or rotated, so that the outer wall (the inner wall of the oil tank Π 31) can be extended to form an external tooth path 36, which facilitates the locking of the traditional internal tooth _ oil (four) (as shown in the figure), but 'The outer tooth path % on the tank port 31 may also be a rib groove or a card on the inner tooth path, the inner wall or the outer wall formed on the inner wall of the box mouth, which is suitable for matching with the fixed portion on the conventional fuel tank cap. The part that is locked or held. However, in the present invention, the oil and gas adapter 2 is fixed by the outer tooth % on the tank port 31. The oil aligner 2 is an integrally formed body, and has an inner cylinder 24, and the center of the inner cylinder 24 is used as a refueling hole 29, and the foot is used for filling the oil into the hole, and the oil is put into the hole. The inner tank 28 is formed on the wall of the hole around the top end of the oiling hole 29 for locking the fuel tank cap 1 with the outer teeth 1 The ribs, the card slots or the snap rings are fastened to seal the oil hole 29; the top of the inner cylinder 24 is extended with a flange 23 and extends at one end of the flange 23 There is formed at least one protruding connecting pipe 22 and another built-in connecting guiding hole 21, and an outer end portion of the flange 23 is extended downward to form an axial outer cylindrical body 25, so that the inner cylindrical body 24 and the outer cylinder A pair of air chambers 20 are formed between the bodies 25; an inner tooth path 26 is formed on the inner wall of the outer cylinder body 25 to facilitate the attachment to the outer tooth path 36 of the fuel tank port 31, so that the oil adapter 2 is A convenient lock is set on the above-mentioned tank port 31 (as shown in FIG. 2); in addition, when the outer tooth path 36 of the tank port 31 is changed to a rib, a card slot or a snap ring, the inner tooth path 26 It can be made into a form suitable for relative locking or holding, or ultrasonic wave welding, rotary welding, vibration welding, high-frequency refining or hot plate, welding 1288205, etc., the inner wall of the outer cylinder 25 is fixed at the tank mouth μ The above-mentioned secondary gas to 20 can communicate with the guiding hole 21 and the connecting pipe 22, and the connecting pipe 22 can be connected to a volatile oil and gas control system (eec) through a conduit to make the fuel tank The oil and gas in the 3 can pass through the guiding hole 21 and the connecting pipe 22 to form a smooth oil and gas supply passage with the volatile oil and gas control system (EEC); the bottom end of the inner cylindrical body 24 is extended with a convex pipe portion 27, and is penetrated to the fuel tank. 3, the convex tube portion 27 maintains a specific twist h (shown in FIG. 2) between the fuel tank 3 and its top wall 33 and communicates with the oil hole 29; the convex tube portion 27 can be connected to the inner wall of the oil tank 3. Between the formation of an expansion gas which is favorable for the accumulation of oil and gas to 30 ', especially when the oil tank 3 is filled with oil, the upper surface of the oil level 34 is surrounded by the convex portion 27 and the inner wall of the oil tank 3 to form an expansion chamber 3 ( As shown in Figure 3) 'The oil and gas in the expansion chamber 30 will Forming an expansion internal pressure to avoid vacuum deformation in the fuel tank due to consumption of the oil; therefore, the convex portion 27 at the bottom end of the oil adapter 2 protrudes to a specific height h in the oil tank 3, which can be determined. The volume of the expansion chamber 3〇, the full load height of the oil level, and the volume of oil that can be filled in the tank. According to this, the fuel tank 3 can be volatilized into the expansion chamber 3〇 and the auxiliary air chamber, and the oil and gas of 32 is transported to the engine volatile oil by the guide hole 21 and the nozzle 22, and is maintained in the control system (EEC) to maintain The internal pressure of the fuel tank 3 is stable and solves the environmental problems caused by oil and gas leakage, and at the same time reduces the waste of oil. </ RTI> </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> <RTIgt; Equivalent techniques for θ-slight modification, etc., shall be subject to the invention, and shall be given in 1288205. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view showing the overall device environment of the present invention, illustrating that an oil and gas adapter can be locked to the tank port, and the fuel tank cap can be mounted on the center oil hole of the oil and gas adapter. Fig. 2 is a cross-sectional view showing the structure of the present invention, showing a configuration in which the oil and gas adapter is assembled to the tank port and the fuel tank cap is plugged. Figure 3 is a cross-sectional view showing the state of the present invention, showing that an expansion chamber is formed above the oil level in the fuel tank, which can communicate with another auxiliary air chamber and is transmitted through the guide hole and the nozzle to the volatile oil and gas control system of the engine. status. [Main component symbol description] 1... - oil phase cover 10... outer teeth 2... - adapter 20 - ... sub air chamber 21 - --- guide hole 22 - ... connector 23 - - flange 24 - --- Inner cylinder 25---outer cylinder 26—·--inner tooth 27- convex tube 28—inner tooth 29- --- force 〇 孑 L h...- special south degree 3... - fuel tank 31... - tank port 30 - ... expansion chamber 33... top wall 34 - --- oil level 35 - oil 36 - --- outer teeth