1274679 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種車輛用燃料箱，其包含在一箱主體之 ，一上壁部分與一下壁部分之至少一部分上形成的一突出部 为，其以此一方式形成以便自此朝向該上壁部分及該下壁 部分的另一部分突出，藉以該上壁部分與該下壁部分在該 、突出部分之一末端處的一接合面彼此接合。 【先前技術】 • 當驅動一車輛時發生由於該車輛之加速或震動而在一燃 料箱中之燃料表面極大波動或較小動盪時，其導致燃料吸 入k得困難或由燃料與該燃料箱之一内表面碰撞產生碰撞 、 噪音之問題。為了解決該等問題，在日本實用新型公開案 第Hei· 7-47219號（下文稱作專利文獻第”虎）中已知下文之 ~ 一燃料箱，其中將一隔板焊接至其一下壁以限制其中之燃 料之移動。 另外5其&出一合成樹脂燃料箱，其中自該燃料箱之一 _上土及下壁以此一方式突出以便彼此接近之突出部分末 端被焊接在一起，因此不僅增加了該燃料箱之上壁及下壁 之硬度而且允許該等突出部分充當一隔板。 順便提及，專利文獻第丨號中所述之該隔板被固定於該燃 料箱之下壁且在該隔板之一上端與該燃料箱之上壁之間提 供有-間隙。然而，在其中藉由將該等突出部分之末端焊 接在起形成该隔板之狀況下，導致以下問題，其中該等 突出部分以此一彳式自該燃料箱之上壁及下壁突出以便彼 102057.doc 1274679 此接近。該問題亦即，由於該上壁與下壁被彼此接合在一 、不犯开y成4述間隙，當導致燃料在該燃料箱中移動 % ’燃料碰撞該隔板且接著強力回彈，導致減弱了該隔板 抑制在該燃料箱中之劇烈表面波動之效果及在該燃料箱内 無法平穩執行氣-液隔離之問題。 【發明内容】 本發明之-目的為改良—燃料箱之—箱主體之硬度，同 時可展現防止燃料表面波動之效果。1274679 IX. The invention relates to a fuel tank for a vehicle, which comprises a protrusion formed on at least a part of an upper wall portion and a lower wall portion of a box body, It is formed in such a manner as to protrude from the other part of the upper wall portion and the lower wall portion, whereby the upper wall portion and the lower wall portion are joined to each other at a joint surface at one end of the protruding portion. [Prior Art] • When a vehicle is driven, when the fuel surface in a fuel tank is greatly fluctuated or less turbulent due to acceleration or vibration of the vehicle, it causes difficulty in fuel intake or is caused by fuel and the fuel tank An internal surface collision creates a problem of collision and noise. In order to solve such problems, in the Japanese Utility Model Publication No. Hei. 7-47219 (hereinafter referred to as Patent Document No. "Tiger", the following fuel tank is known, in which a separator is welded to the lower wall thereof. Restricting the movement of the fuel therein. In addition, 5 & a synthetic resin fuel tank, wherein one of the fuel tanks, the upper and lower walls, protrudes in such a manner that the ends of the protruding portions that are close to each other are welded together, Not only the hardness of the upper and lower walls of the fuel tank is increased but also the protruding portions are allowed to serve as a partition. Incidentally, the partition described in the patent document No. 被 is fixed to the lower wall of the fuel tank. And a gap is provided between the upper end of one of the partitions and the upper wall of the fuel tank. However, in the case where the ends of the protruding portions are welded to form the partition, the following problems are caused. Wherein the protruding portions protrude from the upper wall and the lower wall of the fuel tank in a one-step manner so that the door 102057.doc 1274679 is close thereto. The problem is that the upper wall and the lower wall are joined to each other without breaking open. y into 4 The gap, when causing the fuel to move in the fuel tank, 'the fuel collides with the partition and then rebounds strongly, resulting in a weakening effect of the diaphragm suppressing severe surface fluctuations in the fuel tank and being unstable in the fuel tank The problem of performing gas-liquid isolating. SUMMARY OF THE INVENTION The object of the present invention is to improve the hardness of the fuel tank-box body while exhibiting the effect of preventing fluctuations in the fuel surface.
為達到該目的，根據本發明之—第-方面，其提出一車 輛用燃料相’該燃料箱包含一在箱主體之上壁部分及下壁 部分之至少—部分上形成之突出部分，其以此-方式形成 以便自其朝向該上壁部分及該下壁部分之另—部分突出， 精此該上壁與該下壁在該突出部分—末端之—接合面處彼 此接合中一通道沿該接合面形成，其允許燃料通過於 其間。 根據本叙明之一第二方面，其提出一如在本發明之第一 方面中所陳述之車輛用燃料箱，其中該通道具有_平滑曲 壁部分。 根據本發明之一第三方面，其提出一如在本發明之第一 方面中所陳述之車輛用燃料箱，其中該通道之一側為打 根據本發明之第一方面，該上壁與該下壁在該突出部分 末端之接合面處彼此接合，該突出部分在該箱主體之該上 壁部分及該下壁部分之至少一部分上形成，其以此一^式 102057.doc 1274679 形成以便朝向該上壁部分及該下壁部分之另一部分突出。 因此、’不僅可使該突出部分增強該箱主體之硬度，而且使 其充當一防止該燃料箱中之燃料移動的隔板。另外，由於 該通道沿該突出部分末端之接合面形成’其允許燃料自其 通過，由此通道防止碰撞該突出部分之燃料之強力回彈， 藉此不僅可能進—步增強該隔板之效果，而且可能在該箱 主體内貝現-平滑氣液隔離。此外，由於沿該突出部分末 端之接合面形成該通道，所以可極易形成該通道。 根據本發明之第二方面，由於沿該接合面形成之該通道 具有該平滑曲壁部分，#中該箱主體之上壁與下壁被接合 在-起’所以能夠阻止由於在該通道之壁部分上之應力集 中導致在該接合面上產生之破裂及/或分離。 根據本發明之第三方面，由於沿該接合面形成之通道之 該側為打開的，其中該箱主體之上壁與下壁被接合在一 起，所以允許在橫向引起與該通道碰撞之燃料逸入該通道 内部’該通道在其該側為打開的，藉以抑制燃料回彈，藉 此能夠進一步增加防止燃料表面波動之效果（此在下文稱 作燃料表面波動預防效果）。 【實施方式】 下文將基於在p远附圖式中說明之本發明之具體實施例來 描述實現本發明之一模式。 圖1至圖3係用以展示第一具體實施例，其中圖1為一車輛 用L:料箱之透視目，圖2為沿圖i之線所截取之一别視 圖，圖3為沿圖1之線3_3所戴取之一剖視圖。 102057.doc 1274679 一車輛用燃料箱τ之箱主體丨丨具有一上壁12及一下壁13 亚由合成樹脂模製而成。一燃料泵單元17由位於一安裝凸 緣15之一下表面上之一支架16支撐。該安裝凸緣15可分離 地覆蓋於在該箱主體u之上壁12中形成之一開口 “上。一 自該燃料泵單元17延伸之供給管18穿過該安裝凸緣15藉此 以連接至-引擎（未圖示_自該引擎之回流管19穿過該安 裝凸緣15藉此以延伸進入該燃料箱τ。另外，在該安裝凸緣 15之下表面上提供一具有一浮標2〇之液體水平面感應器 ,21° 一啞鈐式突出部分12a自該上壁12朝向該箱主體U之下 壁13向下突出。一啞鈐式突出部分13a自該下壁13朝向該箱 主體11之上壁12向上突出。該啞鈴式突出部分12a、13&在 大體上矩形接合面22處熔融焊接在一起。一通道23在該接 合面22之一縱向中央部分處橫穿過該接合面22。該通道^ 之一壁部分23a形成為一平滑圓形或橢圓形以便避免應力 集中。藉由使用該等突出部分12a、13a之接合面22來形成 Φ 該通道23可便於該通道23之形成。 提供該等突出部分12a、13a以便在該箱主體^之一橫向 方向（由圖1之箭頭a-a指示之方向）延伸。一主隔室24及一次 隔室25以此一方式界定於該箱主體u内部以便在該箱主體 π之箱主體11縱向方向（由圖i之箭頭b_b指示之方向）橫過 4 4犬出邛为12a、13a彼此分隔開。然而，該主隔室24與 該次隔室25未以一完全形式彼此隔開，而係經由該箱主體 之内部部分使得其彼此連通，該等部分處於該等突出部分 102057.doc 1274679 12a、13a及通道23之縱向端部分橫向外部。當此情況發生 時，較佳地使該通道23之高度lx為該箱主體11之高度尽之 40%或更小（h/H$40〇/c〇。 接著，將描述依照上文描述之該第一具體實施例之功能。 當由於溫度變化而導致該箱主體i丨之内部壓力波動時， 在面積上扁平且寬闊之上壁12及下壁π沿垂直方向趨於變 形。然而，在本發明中，藉由將該上壁12之突出部分12&與 «亥下壁13之突出部分13a在該接合面22處溶融焊接在一 起，可賦予該箱主體11經受内部壓力波動之硬度。 另外，當在該箱主體11中之燃料試圖在與車輛加速或震 動（當驅動車輛時發生）相關聯之縱向（由圖丨之箭頭b_b指示 之方向）移動時，該等突出部分12a、13a (其被置於該主隔 室24與該次隔室25之間）充當隔板藉此防止燃料之移動。因 此，不僅可抑制燃料水平面之極大波動而且可防止產生噪 音，否則該噪音將由於燃料劇烈碰撞該箱主體丨丨之内表面 而產生。 當發生此情況時，由於該通道23以此一方式在該等突出 部分I2a、13a之中央部分形成以便建立該主隔室24與該次 隔室25之間之連通，所以碰撞該等突出部分i2a、i3a之部 分燃料穿過該通道23。因此，在該等突出部分12&、13&上 回彈之燃料量減少，使得可更有效地抑制 且進-步改良了該等突出部分—a用作隔板之功能。 另外，在由於燃料水平面之波動導致大量空氣穿入(例如) 該次隔室25之情況下’已如此穿入之空氣可經由該通道23 102057.doc 1274679 無延遲地返回至該主隔室24。因此，可增強該箱主體11之 氣-液隔離功能，使得在該主隔室及次隔室24、25中之燃料 水平面一致。 詳言之，藉由使該通道23之高度li為該箱主體11高度^之 40%或更小（h/H£40%)可充分展現出該等突出部分12a、na 作為隔板之效果。假設h/H>40%，則太多燃料易於通過該 通道2 3 ’從而將減弱燃料表面波動預防效果。 在該箱主體11之内部壓力增加或自外部施加一撞擊之情 φ 況下將導致之應力集中之發生可藉由該通道23之壁部分 23a的充分彎曲構造而抑制，藉此可防止在接合面以處發生 破裂及/或分離。 接著’將根據圖4描述本發明之第二具體實施例。In order to achieve the object, in accordance with the first aspect of the present invention, a fuel phase for a vehicle includes a protruding portion formed on at least a portion of an upper wall portion and a lower wall portion of the tank body, This manner is formed so as to protrude from the other of the upper wall portion and the lower wall portion, wherein the upper wall and the lower wall are joined to each other at the joint portion-end joint surface A joint surface is formed that allows fuel to pass therethrough. According to a second aspect of the present invention, there is provided a fuel tank for a vehicle as set forth in the first aspect of the invention, wherein the passage has a smooth curved wall portion. According to a third aspect of the present invention, there is provided a fuel tank for a vehicle as set forth in the first aspect of the invention, wherein one side of the passage is in accordance with the first aspect of the invention, the upper wall and the The lower wall is joined to each other at a joint surface of the end of the protruding portion, the protruding portion being formed on the upper wall portion and at least a portion of the lower wall portion of the box body, which is formed by the method 102057.doc 1274679 so as to face The upper wall portion and the other portion of the lower wall portion protrude. Thus, 'not only can the protruding portion reinforce the hardness of the tank body, but also act as a partition that prevents fuel movement in the fuel tank. In addition, since the passage is formed along the joint surface of the end of the protruding portion, which allows fuel to pass therethrough, whereby the passage prevents strong rebound of the fuel colliding with the protruding portion, thereby not only enhancing the effect of the partition further And may be in the body of the box - smooth gas-liquid isolation. Further, since the passage is formed along the joint face of the end of the projecting portion, the passage can be easily formed. According to the second aspect of the present invention, since the passage formed along the joint surface has the smooth curved wall portion, the upper wall and the lower wall of the tank main body are engaged at - so that it can be blocked due to the wall at the passage The stress concentration on the portion results in cracking and/or separation occurring on the joint surface. According to a third aspect of the invention, since the side of the passage formed along the joint surface is open, wherein the upper wall and the lower wall of the tank body are joined together, the fuel escape in the lateral direction is caused to collide with the passage Into the inside of the passage, the passage is open on the side thereof, thereby suppressing fuel rebound, whereby the effect of preventing fluctuation of the fuel surface can be further increased (this is hereinafter referred to as fuel surface fluctuation prevention effect). [Embodiment] Hereinafter, one mode of the present invention will be described based on a specific embodiment of the present invention described in the far-reaching drawings. 1 to 3 are used to show a first embodiment, wherein FIG. 1 is a perspective view of a vehicle L: a bin, FIG. 2 is a view taken along line i of FIG. A cross-sectional view of the 1_3 line taken by 3_3. 102057.doc 1274679 A tank body 丨丨 of a vehicle fuel tank τ has an upper wall 12 and a lower wall 13 which are molded of synthetic resin. A fuel pump unit 17 is supported by a bracket 16 on a lower surface of one of the mounting flanges 15. The mounting flange 15 is detachably covered with an opening formed in the upper wall 12 of the tank body u. A supply pipe 18 extending from the fuel pump unit 17 passes through the mounting flange 15 to thereby connect To the engine (not shown - the return pipe 19 from the engine passes through the mounting flange 15 thereby extending into the fuel tank τ. In addition, a buoy 2 is provided on the lower surface of the mounting flange 15 The liquid level sensor of the crucible, a 21° dumb protruding portion 12a projects downward from the upper wall 12 toward the lower wall 13 of the box main body U. A dumb protruding portion 13a faces the lower body 13 toward the box body The upper wall 12 projects upwardly. The dumbbell-shaped projections 12a, 13& are fusion welded together at a generally rectangular joint surface 22. A passage 23 traverses the joint surface at a longitudinal central portion of the joint surface 22 22. One of the passage walls 23a is formed in a smooth circular or elliptical shape to avoid stress concentration. By using the joint faces 22 of the projections 12a, 13a to form Φ, the passage 23 can facilitate the passage 23 Forming the protruding portions 12a, 13a to provide A lateral direction of the box body (in the direction indicated by the arrow aa of Fig. 1) extends. A main compartment 24 and a primary compartment 25 are defined in this manner in the interior of the box body u so as to be in the box body of the box body π 11 The longitudinal direction (the direction indicated by the arrow b_b in Fig. i) is separated from each other across the 4 4 dog exits 12a, 13a. However, the main compartment 24 and the secondary compartment 25 are not separated from each other in a complete form. Opening, and communicating with each other via the inner portion of the box body, the portions being laterally outward of the longitudinal end portions of the protruding portions 102057.doc 1274679 12a, 13a and the passage 23. When this occurs, preferably The height lx of the passage 23 is 40% or less of the height of the tank main body 11 (h/H$40〇/c〇. Next, the function of the first embodiment according to the above description will be described. When the internal pressure of the tank main body fluctuates due to a temperature change, the area is flat and the upper wall 12 and the lower wall π tend to be deformed in the vertical direction. However, in the present invention, by the upper wall The protruding portion 12 of 12 and the protruding portion 13 of the lower wall 13 a melt-welded together at the joint surface 22, which can impart rigidity to the tank body 11 subjected to internal pressure fluctuations. In addition, when the fuel in the tank main body 11 attempts to accelerate or vibrate with the vehicle (when the vehicle is driven) When the associated longitudinal direction (the direction indicated by the arrow b_b of the figure) is moved, the protruding portions 12a, 13a (which are placed between the main compartment 24 and the secondary compartment 25) act as a partition to prevent The movement of the fuel, therefore, not only can the maximum fluctuation of the fuel level be suppressed but also noise can be prevented, which would otherwise occur due to the fuel violently colliding with the inner surface of the tank body. When this occurs, since the passage 23 is formed in a central portion of the protruding portions I2a, 13a in such a manner as to establish communication between the main compartment 24 and the sub-compartment 25, the protruding portions are collided A portion of the fuel of i2a, i3a passes through the passage 23. Therefore, the amount of fuel rebounded on the projections 12 & 13 & 13 is reduced, so that the function of the projections, a, as a spacer, can be more effectively suppressed and further improved. In addition, in the event that a large amount of air penetrates, for example, the sub-chamber 25 due to fluctuations in the fuel level, the air that has been so penetrated can be returned to the main compartment 24 without delay via the passage 23 102057.doc 1274679 without delay. . Therefore, the gas-liquid separation function of the tank main body 11 can be enhanced so that the fuel level in the main compartment and the sub-compartments 24, 25 coincide. In detail, by making the height li of the passage 23 40% or less (h/H £40%) of the height of the tank main body 11, the effect of the projections 12a and na as the partition can be sufficiently exhibited. . Assuming h/H > 40%, too much fuel will easily pass through the channel 2 3 ' and thus will attenuate the fuel surface fluctuation prevention effect. The occurrence of stress concentration caused by an increase in internal pressure of the tank main body 11 or an impact from the outside can be suppressed by the sufficiently curved configuration of the wall portion 23a of the passage 23, thereby preventing engagement at the joint The surface is cracked and/or separated. Next, a second embodiment of the present invention will be described based on Fig. 4.
該第二具體實施例為一通道23之—壁部分23a之一側處 於打開狀態’且其他組成特徵與該第—具體實施例之特徵 保持相同。根據該第二具體實施例，當與驅動車輛時車輛 之加速或震動相關聯而致使—箱主體u中之燃料沿一箭頭 c指示之方向移動時，由於允許部分燃料經由該通道Μ自其 開口側逸入主隔室及次隔室24、25，所以減弱了燃料回彈， 從而可能更有效地抑制燃料表面波動。 二：，將根據圖5描述本發明之第三具體實施例。 '亥第二具體實施例為一通道23 ^成為具有一啞鈴截面之 /狀’其中可調整該通道 度。 戳面積而不增加通道23之高 接著，將根據圖6描述本發明之第四具體實施例 102057.doc -10- 1274679 該第四具體實施例為一通道23形成為具有一鞍狀截面之 形狀，其中相應於燃料水平面之升高來減弱燃料表面波動 預防效果。 因此’儘管上文已描述了本發明之該等具體實施例，但 是在不偏離本發明之精神及範嘴的情況下能以有關本發明 之设汁之各種方式修改本發明。 “舉例而言’儘管該等具體實施例之箱主㈣由合成樹脂 模製’但疋其亦可由一金屬形成。 . 另外’儘管在該等具體實施例中，該上㈣之突出部分 12a及该下壁13之突丨部分⑴在該接合面η處㈣焊接在 -起’但是可採用包括壓焊及其它類型焊接等其他接 法。 此外，儘官在該等具體實施例中，該等突出部分仏、⑴ 在該上壁12與該下壁13上形成，但是該突出部分亦可僅形 成在上壁與下壁之任何一者上。 、此外’儘官在該等具體實施例中，該箱主體^具有單一 _通道23，但是亦可提供複數個通道23。 另外’該通道23之形狀不限於該等具體實施例中所描述 之形狀而可對其進行適當修改。 【圖式簡單說明】 圖1為根據本發明之第—具體實施例之-車輛用燃料箱 的一透視圖。 圖2為沿圖1之線2-2所截取之剖視圖。 圖3為沿圖丨之線3_3所截取之剖視圖。 102057.doc 1274679 圖4為對應於圖3之視圖，其說明了根據第二具體實施例 之一車輛用燃料箱。 圖5為對應於圖3之視圖，其說明了根據第三具體實施例 之一車輛用燃料箱。 圖6為對應於圖3之視圖，其說明了根據第四具體實施例 之一車輛用燃料箱。 【主要元件符號說明】This second embodiment is a channel 23 - one side of the wall portion 23a is in the open state' and the other constituent features remain the same as those of the first embodiment. According to this second embodiment, when the fuel in the tank body u is moved in the direction indicated by an arrow c in association with the acceleration or vibration of the vehicle when the vehicle is driven, since a portion of the fuel is allowed to pass through the passage through the passage The side escapes into the main compartment and the secondary compartments 24, 25, so the fuel rebound is weakened, so that fuel surface fluctuations may be more effectively suppressed. Two: A third embodiment of the present invention will be described based on FIG. The second embodiment of the invention is a channel 23 ^ which has a / dumbbell shape of a dumbbell section in which the channel degree can be adjusted. Placing the area without increasing the height of the channel 23 Next, a fourth embodiment of the invention will be described in accordance with Figure 6 102057.doc -10- 1274679. The fourth embodiment is such that a channel 23 is formed to have a shape of a saddle section Wherein the fuel surface fluctuation prevention effect is attenuated corresponding to an increase in the fuel level. Accordingly, the present invention may be modified in various ways in accordance with the present invention without departing from the spirit and scope of the invention. "For example, although the tank main (4) of the specific embodiments is molded from a synthetic resin, it may be formed of a metal. Further 'although in the specific embodiments, the upper portion (4) of the upper portion (4) The abrupt portion (1) of the lower wall 13 is welded at the joint surface η (4) but other connections including pressure welding and other types of welding may be employed. Further, in these specific embodiments, such a protruding portion 仏, (1) is formed on the upper wall 12 and the lower wall 13, but the protruding portion may also be formed only on either of the upper wall and the lower wall. Further, in the specific embodiment The box body ^ has a single channel 23, but a plurality of channels 23 may also be provided. Further, the shape of the channel 23 is not limited to the shape described in the specific embodiments, and may be appropriately modified. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a fuel tank for a vehicle according to a first embodiment of the present invention. Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1. Fig. 3 is a line along the line Sectional view taken at 3_3. 102057.doc 1274679 Figure 4 Corresponding to the view of Fig. 3, a fuel tank for a vehicle according to a second embodiment is illustrated. Fig. 5 is a view corresponding to Fig. 3, illustrating a fuel tank for a vehicle according to a third embodiment. 6 is a view corresponding to FIG. 3, which illustrates a fuel tank for a vehicle according to a fourth embodiment. [Description of Main Components]
Η 箱主體高度 h 通道高度 T 車輛用燃料箱 2 線 3 線 11 箱主體 12 上壁 12a 上壁之突出部分 13 下壁 13a 下壁之突出部分 14 開口 15 安裝凸緣 16 支架 17 燃料泵裝置 18 供給管 19 回流管 20 浮標 102057.doc -12 1274679 21 22 23 23a 24 25 液體水平面感應器 接合面 通道 壁部分 主隔室 次隔室Η Box body height h Channel height T Vehicle fuel tank 2 Line 3 Line 11 Box body 12 Upper wall 12a Projection of upper wall 13 Lower wall 13a Projection of lower wall 14 Opening 15 Mounting flange 16 Bracket 17 Fuel pump unit 18 Supply pipe 19 return pipe 20 buoy 102057.doc -12 1274679 21 22 23 23a 24 25 liquid level sensor joint surface channel wall part main compartment secondary compartment
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