JP2020070747A - Fuel supply device - Google Patents

Fuel supply device Download PDF

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JP2020070747A
JP2020070747A JP2018204928A JP2018204928A JP2020070747A JP 2020070747 A JP2020070747 A JP 2020070747A JP 2018204928 A JP2018204928 A JP 2018204928A JP 2018204928 A JP2018204928 A JP 2018204928A JP 2020070747 A JP2020070747 A JP 2020070747A
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fuel
supply device
fuel supply
main body
shape
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JP6605108B1 (en
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基生 清水
Motoki Shimizu
基生 清水
一之 山本
Kazuyuki Yamamoto
一之 山本
光藤 英雄
Hideo Koto
英雄 光藤
和久 栗田
Kazuhisa Kurita
和久 栗田
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

To provide a highly reliable fuel supply device for improving the strength of welded portions without greatly changing the shapes in the limited mounting range of a fuel tank even in consideration of fatigue strength degradation at the welded portions of a case body of the fuel supply device due to a pressure change in the fuel supply device and a load increase due to higher fuel pressure.SOLUTION: A fuel supply device 1 includes a case body 2 split into a cover part 22 on the top face side of a communication flow path 8t and a body part 21 on the bottom face side. In the fuel supply device 1, an abutment end of the outer periphery of the cover part 22 on the body part 21 and an abutment end of the outer periphery of the body part 21 on the cover part 22 are put in abutment to have face contact with each other, and welding is applied to an area where they are put in abutment. Both the face of the body part 21 having face contact with the cover part 22 and the face of the cover part having face contact with the body part have respective shapes (reinforced shape parts 21wm, 22wm) such that the faces having face contact with each other are enlarged to increase the strength of the welded portions.SELECTED DRAWING: Figure 8

Description

本願は、燃料タンクから燃料を吸上げ、吸い上げた燃料を加圧して、エンジン等の燃料消費機器に供給する燃料供給装置に関し、例えば、燃料タンク底面の開口部から挿入される型式の燃料供給装置等に適用可能である。   The present application relates to a fuel supply device that sucks fuel from a fuel tank, pressurizes the sucked fuel, and supplies the fuel to a fuel consuming device such as an engine. For example, a fuel supply device of a type inserted from an opening on a bottom surface of the fuel tank. Etc. can be applied.

例えば車両用の燃料供給装置の中でも、例えば自動二輪車用の燃料供給装置は、自動二輪車の燃料タンクの構造上、燃料タンク底面から燃料タンク内部に挿入され、燃料タンク底面から燃料タンク内に直立するように設置される。このような燃料供給装置では、燃料タンク底面の開口部に液密に固定されるフランジ上の蓋部材に対し、燃料ポンプ、フィルタ、等を収納したケース体を嵌め込むようにして構成されている。   For example, among fuel supply devices for vehicles, for example, a fuel supply device for motorcycles is inserted into the fuel tank from the bottom of the fuel tank and stands upright in the fuel tank from the bottom of the fuel tank due to the structure of the fuel tank of the motorcycle. Is installed. In such a fuel supply device, a case body accommodating a fuel pump, a filter, and the like is fitted into a lid member on a flange that is liquid-tightly fixed to an opening on the bottom surface of the fuel tank.

ケース体には、主に、燃料ポンプ、燃料ポンプが吸い上げる燃料をろ過する一次フィルタ、燃料ポンプによって加圧された燃料をろ過する高圧フィルタ、燃料ポンプが吐出した燃料のうち過剰な燃料を排出するための背圧弁、等の各種部材が収納される。その中でも、燃料ポンプと高圧フィルタは、何れも円筒状の形態を崩すことができない嵩の高い部材である。従って、燃料タンク高さの制約から、燃料ポンプと高圧フィルタとを垂直方向に直線状に並べて配置することはできない。   The case body mainly has a fuel pump, a primary filter for filtering fuel sucked up by the fuel pump, a high-pressure filter for filtering fuel pressurized by the fuel pump, and an excess fuel discharged from the fuel pump. Various members such as a back pressure valve for storing are stored. Among them, both the fuel pump and the high-pressure filter are bulky members that cannot collapse their cylindrical shapes. Therefore, the fuel pump and the high-pressure filter cannot be arranged in a straight line in the vertical direction due to the restriction on the height of the fuel tank.

そのため、燃料を下方から吸上げて上方に向けて吐出するように配置する必要がある燃料ポンプに対して、高圧フィルタを水平方向に並べて配置することになる。従って、燃料ポンプから吐出された高圧燃料が流入する高圧フィルタの高圧燃料流入側と燃料ポンプの高圧燃料吐出側とを連通する連通流路を、燃料供給装置のケース体の上方に形成する必要がある。
一方、ケース体には、燃料ポンプ、フィルタ、等を組み込む必要があり、連通流路を含めてケース体を一体成型することはできない。従って、ケース体を、燃料ポンプ、フィルタ、等を組み込む本体部と、連通流路が形成されたカバー部とで構成し、燃料ポンプ、フィルタ、等が組み込まれた本体部に、連通流路が形成されたカバー部を、溶着することによって、本体部とカバー部とが液密に一体化されたケース体が形成されている(例えば、特許文献1参照。)。
Therefore, the high-pressure filters are arranged side by side in the horizontal direction with respect to the fuel pump which needs to be arranged so as to suck up the fuel from below and discharge it upward. Therefore, it is necessary to form a communication passage, which communicates between the high-pressure fuel inflow side of the high-pressure filter into which the high-pressure fuel discharged from the fuel pump flows and the high-pressure fuel discharge side of the fuel pump, above the case body of the fuel supply device. is there.
On the other hand, it is necessary to incorporate a fuel pump, a filter, etc. in the case body, and the case body cannot be integrally molded including the communication passage. Therefore, the case body is composed of the main body part in which the fuel pump, the filter, etc. are incorporated, and the cover part in which the communication passage is formed, and the communication passage is formed in the main body part in which the fuel pump, the filter, etc. are incorporated. By welding the formed cover portion, a case body in which the main body portion and the cover portion are liquid-tightly integrated is formed (for example, refer to Patent Document 1).

特開201−117323号公報(段落0013から0027、図1から図4)JP 201-117323 A (paragraphs 0013 to 0027, FIGS. 1 to 4)

上述したような溶着による一体化では、連通流路を囲む外周部の肉厚を一定以上にすることで、溶着面積を確保し、数百kPaの内圧にも耐えられるようにしている。しかしながら、車両におけるエンジン等の燃料消費機器では、運転/停止の頻度が高く、それに応じて流路に掛る内圧が頻繁に変化することで、溶着部分に繰り返し荷重が掛かり、疲労強度低下により溶着部の破断が懸念される。加えて、近年は、燃料噴射装置の噴射燃料微細化を目的として高燃圧化の傾向にあり、燃料ポンプの発生圧力が高まっていることから、溶着部への負荷はより厳しくなりつつある。しかし、自動二輪車の燃料タンクは意匠性が高く、燃料供給装置の取付けスペースが限られていることから、安易に溶着部の肉厚を増やし、燃料供給装置の取付けスペースを拡大させることは困難である。   In the integration by welding as described above, the thickness of the outer peripheral portion surrounding the communication flow path is set to a certain value or more to secure a welding area and to withstand an internal pressure of several hundred kPa. However, in a fuel consuming device such as an engine in a vehicle, the frequency of operation / stop is high, and the internal pressure applied to the flow path is frequently changed accordingly. There is concern about breakage. In addition, in recent years, there has been a tendency toward higher fuel pressure for the purpose of refining the injected fuel of the fuel injection device, and since the pressure generated by the fuel pump is increasing, the load on the welded portion is becoming more severe. However, since the fuel tank of the motorcycle has a high design and the mounting space for the fuel supply device is limited, it is difficult to easily increase the thickness of the welded portion and expand the mounting space for the fuel supply device. is there.

本願は、上記のような課題を解決するためになされたものであり、燃料供給装置内の圧力変動による燃料供給装置のケース体の溶着部での疲労強度低下、および高燃圧化による負荷増大を考慮しても、燃料タンクの限られた搭載範囲の中で、大きく形状を変化させることなく、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることを目的とする。   The present application has been made in order to solve the above problems, and reduces the fatigue strength at the welded portion of the case body of the fuel supply device due to pressure fluctuations in the fuel supply device, and increases the load due to high fuel pressure. Even in consideration, it is an object of the present invention to improve the strength of the welded portion and to obtain a highly reliable fuel supply device without greatly changing the shape within a limited mounting range of the fuel tank.

本願に係る燃料供給装置は、軸方向の一方の側に燃料の吸込み口が、他方の側に加圧した前記燃料の吐出口がそれぞれ設けられた燃料ポンプと、前記燃料ポンプから吐出された燃料を吸入口から吸入して浄化する円筒状の高圧フィルタと、前記吐出口と前記吸入口とを連通する連通流路を形成するケース体と、を備え、前記燃料ポンプおよび高圧フィルタは、前記ケース体に、所定間隔を隔てて並列に内蔵され、前記ケース体は、前記連通流路の天面側のカバー部と底面側の本体部とに分割して構成され、前記カバー部の外周部の前記本体部との突合せ端と、前記本体部の外周部の前記カバー部との突合せ端とが面接触するように突き合わされて、この突き合わされた部分で、溶着される燃料供給装置において、前記本体部の前記カバー部と面接触する面および前記カバー部の前記本体部と面接触する面の双方に、前記溶着の部分の強度が上がるように前記面接触する面が拡大した形状が施されているものである。   The fuel supply device according to the present application includes a fuel pump having a fuel suction port on one side in the axial direction and a pressurized fuel discharge port on the other side, and a fuel discharged from the fuel pump. A high pressure filter having a cylindrical shape for inhaling and purifying the air from an intake port, and a case body forming a communication flow path for communicating the discharge port with the intake port, wherein the fuel pump and the high pressure filter are the case The case body is built in parallel to the body at a predetermined interval, and the case body is configured by being divided into a cover portion on the top surface side of the communication channel and a main body portion on the bottom surface side. In the fuel supply device, the abutting end with the main body portion and the abutting end with the cover portion of the outer peripheral portion of the main body portion are butted so as to come into surface contact with each other, and the welded portion is welded at the butted portion. With the cover portion of the main body To both the main body and the surface contact surfaces of the contact surfaces and the cover portion, said face contact surfaces so that the intensity is increased portion of the weld is that expanded shape is applied.

本願の燃料供給装置によれば、燃料供給装置内の圧力変動による燃料供給装置のケース体の溶着部での疲労強度低下、および高燃圧化による負荷増大を考慮しても、燃料タンクの限られた搭載範囲の中で、大きく形状を変化させることなく、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることができる。   According to the fuel supply device of the present application, the fuel tank is limited even if the fatigue strength of the welded portion of the case body of the fuel supply device is reduced due to pressure fluctuations in the fuel supply device and the load is increased due to higher fuel pressure. Within the mounting range, the strength of the welded portion can be improved without significantly changing the shape, and a highly reliable fuel supply device can be obtained.

本願の実施の形態1を例示する図で、燃料供給装置が取り付けられた燃料タンク内の燃料のフローを例示してある。FIG. 1 is a diagram illustrating Embodiment 1 of the present application, illustrating a flow of fuel in a fuel tank to which a fuel supply device is attached. 本願の実施の形態1を例示する図で、フランジ部上に搭載された支持部に、燃料供給装置が取り付けられた状態を例示する斜視図である。FIG. 3 is a diagram illustrating Embodiment 1 of the present application, and is a perspective view illustrating a state in which a fuel supply device is attached to a support portion mounted on a flange portion. 本願の実施の形態1を例示する図で、フランジ部上に搭載された支持部に、燃料供給装置が取り付けられた状態を例示する平面図である。FIG. 3 is a diagram illustrating Embodiment 1 of the present application, and is a plan view illustrating a state in which a fuel supply device is attached to a support portion mounted on a flange portion. 本願の実施の形態1を例示する図で、燃料供給装置におけるケース体を構成する本体部の断面図であって、図3におけるIV−IV線における断面を矢印方向に見た図である。FIG. 4 is a diagram illustrating the first embodiment of the present application and is a cross-sectional view of a main body part that forms a case body in the fuel supply device, and is a view of a cross-section taken along line IV-IV in FIG. 本願の実施の形態1を例示する図で、燃料供給装置の軸方向および連通流路に平行な断面の図であって、図3におけるV−V線における断面を矢印方向に見た図である。FIG. 4 is a diagram illustrating the first embodiment of the present application, and is a view of a cross section parallel to the axial direction and the communication flow path of the fuel supply device, and is a view of the cross section taken along the line VV in FIG. 3 as viewed in the arrow direction. .. 本願の実施の形態1を例示する図で、燃料供給装置の連通流路に垂直な断面の図であって、図3におけるVI−VI線における断面を矢印方向に見た図である。FIG. 4 is a diagram illustrating the first embodiment of the present application and is a diagram of a cross section perpendicular to the communication channel of the fuel supply device, taken along line VI-VI in FIG. 本願の実施の形態1を例示する図で、燃料供給装置のケース体に高圧フィルタを矢印のように組み込む様子を示す斜視図である。FIG. 3 is a diagram illustrating Embodiment 1 of the present application, and is a perspective view showing a state in which a high-pressure filter is incorporated into a case body of a fuel supply device as indicated by an arrow. 本願の実施の形態1を例示する図で、燃料供給装置におけるケース体を構成する2つの部材である本体部およびカバー部を、それらを矢印のように組み付ける様子を、それらを溶着する前(樹脂部品を溶かして接合する前)の状態で示す図であって、本体部は平面図で、カバー部は斜視図で、それぞれ溶着面側が例示されている。FIG. 1 is a diagram illustrating Embodiment 1 of the present application, showing a state in which a main body portion and a cover portion, which are two members constituting a case body in a fuel supply device, are assembled as shown by arrows before welding (resin) It is a figure shown in the state before melt | dissolving and joining components, a main body part is a top view, a cover part is a perspective view, and the welding surface side is illustrated respectively. 本願の実施の形態1を例示する図で、燃料供給装置のケース体の斜視図である。FIG. 3 is a diagram illustrating Embodiment 1 of the present application, and is a perspective view of a case body of the fuel supply device. 本願の実施の形態2を例示する図で、燃料供給装置におけるケース体を構成する2つの部材である本体部およびカバー部を、それらを矢印のように組み付ける様子を、それらを溶着する前(樹脂部品を溶かして接合する前)の状態で示す図であって、本体部は平面図で、カバー部は斜視図で、それぞれ溶着面側が例示されている。FIG. 4 is a diagram illustrating Embodiment 2 of the present application, showing a state in which a main body portion and a cover portion, which are two members constituting a case body in a fuel supply device, are assembled as indicated by arrows before welding (resin It is a figure shown in the state before melt | dissolving and joining components, a main body part is a top view, a cover part is a perspective view, and the welding surface side is illustrated respectively. 本願の実施の形態2を例示する図で、図10の事例についての補足説明を行うための平面図である。FIG. 11 is a diagram illustrating the second embodiment of the present application, and is a plan view for providing supplementary explanation about the case of FIG. 10. 本願の実施の形態3を例示する図で、燃料供給装置におけるケース体を構成する2つの部材である本体部およびカバー部を、それらを矢印のように組み付ける様子を、それらを溶着する前(樹脂部品を溶かして接合する前)の状態で示す図であって、本体部は平面図で、カバー部は斜視図で、それぞれ溶着面側が例示されている。FIG. 8 is a diagram illustrating a third embodiment of the present application, showing a state in which a main body portion and a cover portion, which are two members constituting a case body in a fuel supply device, are assembled as shown by arrows before welding (resin It is a figure shown in the state before melt | dissolving and joining components, a main body part is a top view, a cover part is a perspective view, and the welding surface side is illustrated respectively. 本願の実施の形態4を例示する図で、燃料供給装置におけるケース体を構成する2つの部材である本体部およびカバー部を、それらを矢印のように組み付ける様子を、それらを溶着する前(樹脂部品を溶かして接合する前)の状態で示す図であって、本体部は平面図で、カバー部は斜視図で、それぞれ溶着面側が例示されている。FIG. 8 is a diagram illustrating a fourth embodiment of the present application, showing a state in which a main body portion and a cover portion, which are two members forming a case body in a fuel supply device, are assembled as shown by arrows before welding (resin It is a figure shown in the state before melt | dissolving and joining components, a main body part is a top view, a cover part is a perspective view, and the welding surface side is illustrated respectively.

実施の形態1.
以下、実施の形態1を、燃料供給装置が自動二輪車用の燃料タンク底面から燃料タンク内に直立するように設置される場合を例として、図1から図9を使って説明する。なお、実施の形態1は、自動二輪車以外の車両、乗り物、などに搭載されたエンジン等の燃料消費装置に燃料を供給する場合にも適用可能である。
図1は燃料供給装置が取り付けられた燃料タンク内の燃料のフローを例示してある図、図2はフランジ部上に搭載された支持部に燃料供給装置が取り付けられた状態を例示する斜視図、図3はフランジ部上に搭載された支持部に燃料供給装置が取り付けられた状態を例示する平面図、図4は燃料供給装置におけるケース体を構成する本体部の断面図であって図3におけるIV−IV線における断面を矢印方向に見た図、図5は燃料供給装置の軸方向および連通流路に平行な断面の図であって図3におけるV−V線における断面を矢印方向に見た図、図6は燃料供給装置の連通流路に垂直な断面の図であって、図3におけるVI−VI線における断面を矢印方向に見た図である
Embodiment 1.
Hereinafter, Embodiment 1 will be described with reference to FIGS. 1 to 9 by taking as an example a case where a fuel supply device is installed so as to stand upright in a fuel tank from a bottom surface of a fuel tank for a motorcycle. The first embodiment is also applicable to a case where fuel is supplied to a fuel consuming device such as an engine mounted on a vehicle other than a motorcycle, a vehicle, or the like.
FIG. 1 is a diagram illustrating a flow of fuel in a fuel tank to which a fuel supply device is attached, and FIG. 2 is a perspective view illustrating a state in which the fuel supply device is attached to a support portion mounted on a flange portion. 3 is a plan view illustrating a state in which a fuel supply device is attached to a support part mounted on a flange part, and FIG. 4 is a cross-sectional view of a main body part that constitutes a case body in the fuel supply device. 3 is a view of a cross section taken along line IV-IV in FIG. 5, and FIG. 5 is a view of a cross section parallel to the axial direction of the fuel supply device and the communication passage. FIG. 6 is a view of a cross section perpendicular to the communication passage of the fuel supply device, and is a view of the cross section taken along the line VI-VI in FIG.

また、図7は燃料供給装置のケース体に高圧フィルタを矢印のように組み込む様子を示す斜視図、図8は燃料供給装置におけるケース体を構成する2つの部材である本体部およびカバー部を、それらを矢印のように組み付ける様子を、それらを溶着する前(樹脂部品を溶かして接合する前)の状態で示す図であって、本体部は平面図で、カバー部は斜視図で、それぞれ溶着面側が例示されている。図9は、燃料ポンプおよび高圧フィルタが組み込まれた本体部に、カバー部を組み付けた後に、本体部とカバー部との継目の部分で本体部とカバー部とを溶着して形成された燃料供給装置のケース体の斜視図である。   FIG. 7 is a perspective view showing how the high-pressure filter is incorporated in the case body of the fuel supply device as shown by the arrow, and FIG. 8 shows the main body part and the cover part which are the two members constituting the case body of the fuel supply device. FIG. 3 is a view showing how to assemble them as shown by arrows in a state before welding them (before melting and joining the resin parts), in which the main body is a plan view and the cover is a perspective view. The surface side is illustrated. FIG. 9 shows a fuel supply formed by assembling a cover part to a main body part in which a fuel pump and a high-pressure filter are assembled, and then welding the main body part and the cover part together at a joint between the main body part and the cover part. It is a perspective view of the case body of an apparatus.

本願の実施の形態1にかかる燃料供給装置は、基本的な構成として、図1に例示されているように、燃料990中の夾雑物を除去するサクションフィルタ4と、サクションフィルタ4を介して燃料タンク920内の燃料990を吸引し、加圧して吐出する燃料ポンプ5とを備えている。
そして、燃料供給装置は、例えば、燃料ポンプ5内で発生した高圧燃料中の夾雑物等を除去するための高圧フィルタ6と、圧が保持されエンジン910等の燃料消費装置で消費されなかった燃料990を燃料タンク920に戻すための背圧弁7とを備えている。
The fuel supply device according to the first embodiment of the present application has, as a basic configuration, a suction filter 4 for removing impurities in the fuel 990, and a fuel via the suction filter 4 as illustrated in FIG. A fuel pump 5 for sucking, pressurizing and discharging the fuel 990 in the tank 920 is provided.
Then, the fuel supply device includes, for example, a high-pressure filter 6 for removing impurities and the like in the high-pressure fuel generated in the fuel pump 5, and a fuel whose pressure is maintained and which is not consumed by the fuel consumption device such as the engine 910. The back pressure valve 7 for returning the 990 to the fuel tank 920 is provided.

とくに、本実施の形態にかかる燃料供給装置は、自動二輪車用のように、燃料タンク920の底面側に設けられた開口部から燃料タンク920内部に挿入され、燃料タンク920の内底面から燃料タンク920内に直立するように設置されることを想定したものである。そのため、図2および図3に例示されているように、燃料タンク920の底面の図示しない開口部に固定するための蓋部材3と、蓋部材3に下方部分が固定され、上方に向かって直立するように配置されるケース体2とで、筐体10が形成されている。   Particularly, the fuel supply device according to the present embodiment is inserted into the inside of the fuel tank 920 through an opening provided on the bottom surface side of the fuel tank 920 and is used from the inner bottom surface of the fuel tank 920 as in the motorcycle. It is supposed to be installed upright in 920. Therefore, as illustrated in FIGS. 2 and 3, the lid member 3 for fixing to the opening (not shown) on the bottom surface of the fuel tank 920, and the lower portion of the lid member 3 are fixed so that the lid member 3 stands upright. A housing 10 is formed by the case body 2 that is arranged as described above.

蓋部材3は、有底円筒状をなし燃料タンク920の開口部の蓋として機能する円盤状のフランジ部3fと、フランジ部3fに対して垂直方向に直立するように形成され、ケース体2を支持するとともにサブタンクとしても機能する円筒状の支持部3sと、を有している。
そして、燃料990を燃料タンク920外の燃料消費装置に供給するための吐出配管3e、および符号を付さない電気コネクタを含め、フランジ部3fおよび支持部3sは、ポリアセタール(POM)等の樹脂により、蓋部材3として一体に形成されている。
The lid member 3 is formed in a cylindrical shape having a bottom and functions as a lid for the opening of the fuel tank 920, and a disk-shaped flange portion 3f, and stands upright in the vertical direction with respect to the flange portion 3f. It has a cylindrical support portion 3s that supports and also functions as a sub tank.
The flange portion 3f and the support portion 3s including the discharge pipe 3e for supplying the fuel 990 to the fuel consuming device outside the fuel tank 920, and the electrical connector without reference numeral are made of resin such as polyacetal (POM). The lid member 3 is integrally formed.

ケース体2は、蓋部材3に支持され、燃料ポンプ5としての主要機器を内部に収容する本体部21と、本体部21に溶着されることで、燃料ポンプ5の吐出口5xから高圧フィルタ6の吸入口6iに折り返す連通流路8t(図1)を形成するカバー部22とで構成されている。
本体部21およびカバー部22は、いずれも蓋部材3と同様に、POM等の樹脂を成形することにより形成されたものである。
本体部21およびカバー部22は、必ずしも同じ材料で形成する必要はないが、本体部21とカバー部22とを良好に溶着できるように、同様の熱的性質を有し、互いに親和性を有する材料の組み合わせになるように構成することが望ましい。
The case body 2 is supported by the lid member 3 and is welded to the main body portion 21 that accommodates the main equipment as the fuel pump 5 therein, so that the high pressure filter 6 is discharged from the discharge port 5x of the fuel pump 5. And a cover portion 22 that forms a communication flow path 8t (FIG. 1) that folds back to the suction port 6i.
Both the main body portion 21 and the cover portion 22 are formed by molding a resin such as POM, like the lid member 3.
The body portion 21 and the cover portion 22 do not necessarily have to be formed of the same material, but have the same thermal properties and have an affinity for each other so that the body portion 21 and the cover portion 22 can be welded well. It is desirable that the material be a combination of materials.

本体部21は、図4に例示してあるように、燃料ポンプ5を収容するため下方側に開口するポンプ用空間21spと、高圧フィルタ6を収容するため上方側に開口する高圧フィルタ用空間21sfとを有している。
ポンプ用空間21spの上部には燃料ポンプ5用の取付孔2jpが形成されている。
高圧フィルタ用空間21sfの下方部には、高圧フィルタ6用の取付孔2jfが形成されている。
燃料ポンプ5用の取付孔2jpに連なる上側の隔壁21wtより上方部分は開放されている。
高圧フィルタ6用の取付孔2jfの下方には、吐出流路8eとして、吐出配管21eに連通する連通孔が形成されている。
As illustrated in FIG. 4, the main body portion 21 has a pump space 21sp that opens downward to accommodate the fuel pump 5, and a high-pressure filter space 21sf that opens upward to accommodate the high-pressure filter 6. And have.
A mounting hole 2jp for the fuel pump 5 is formed in the upper part of the pump space 21sp.
A mounting hole 2jf for the high pressure filter 6 is formed in a lower portion of the high pressure filter space 21sf.
The upper part of the partition 21wt on the upper side, which is continuous with the mounting hole 2jp for the fuel pump 5, is open.
Below the mounting hole 2jf for the high-pressure filter 6, a communication hole communicating with the discharge pipe 21e is formed as the discharge flow path 8e.

高圧フィルタ用空間21sfを形成する円筒状の隔壁21wf、および隔壁21wfと上部で連なる平板状の隔壁21wtは、圧力差に対する強度を確保するため、ポンプ用空間21spを形成する略円筒状の隔壁21wpよりも厚みが厚く形成されている。そして、平板状の隔壁21wtの上方には、周囲を囲む隔壁(外周部21p)の端面が同一平面まで延伸して、溶着面(突き合わせ端21fpと称する。)が形成されている。   The cylindrical partition wall 21wf forming the high-pressure filter space 21sf and the plate-shaped partition wall 21wt connected to the partition wall 21wf at the upper part have a substantially cylindrical partition wall 21wp forming the pump space 21sp in order to secure the strength against the pressure difference. It is formed thicker than that. Then, above the plate-shaped partition wall 21wt, an end surface of the partition wall (outer peripheral portion 21p) surrounding the periphery extends to the same plane to form a welding surface (referred to as a butt end 21fp).

さらに、燃料ポンプ5用の取付孔2jpと高圧フィルタ用空間21sfの開口部とを結ぶ、隔壁21wtの表側の面(連通流路8tの底面8fb)は、カバー部22とともに、図5、図6に例示してあるように、連通流路8tを形成するための空間が形成されている。
そして、連通流路8tの両側壁に、本体部21側の補強形状部21wmおよびカバー部22側の22wmが、それぞれ形成されている。
なお、図5の切断面は図4の切断面よりも手前側(図3における左側)であり、図5には、背圧弁7を取付けるために下方側に開口する、背圧弁7取り付け用の取付孔2jrが図示されている。
Further, the front side surface of the partition wall 21wt (the bottom surface 8fb of the communication channel 8t), which connects the mounting hole 2jp for the fuel pump 5 and the opening of the high pressure filter space 21sf, together with the cover portion 22, is shown in FIGS. As illustrated in, a space for forming the communication channel 8t is formed.
Then, on both side walls of the communication channel 8t, a reinforcing shape portion 21wm on the main body portion 21 side and a 22wm on the cover portion 22 side are formed, respectively.
The cut surface of FIG. 5 is on the front side (left side in FIG. 3) of the cut surface of FIG. 4, and in FIG. 5, the back pressure valve 7 is attached to the back side for opening the back pressure valve 7 downward. The mounting hole 2jr is shown.

カバー部22は、溶着によって本体部21と接合されることによりケース体2を形成している。カバー部22は、連通流路8tを形成するためのもので、図8に示すように、本体部21の隔壁21wtより上側の部分と軸に垂直な面において同じ外径を有する有底の長小判形をなしている。
そして、カバー部22は、本体部21の突き合わせ端21fpに対応する突き合わせ端22fpと、本体部21に嵌め込んだ高圧フィルタ6の上側の環状の突起部6cuの突き合わせ端6fjに対応する円環状の突き合わせ端22fjが形成された円環状部22jと、を有している。
さらに、本体部21は、連通流路8tに設けられ、高圧フィルタ用空間21sfに外周部21pの内壁を連通流路8t内に突出するように延伸させた形状の補強形状部21wmを有し、カバー部22は、外周部22pの内壁を連通流路8t内に突出するように延伸させた補強形状部22wmを有している。
The cover portion 22 is joined to the main body portion 21 by welding to form the case body 2. The cover portion 22 is for forming the communication flow path 8t, and as shown in FIG. 8, has a bottomed long portion having the same outer diameter as the portion above the partition wall 21wt of the main body portion 21 in the plane perpendicular to the axis. It has an oval shape.
The cover portion 22 has an annular shape corresponding to the abutting end 22fp corresponding to the abutting end 21fp of the main body portion 21 and the abutting end 6fj of the upper annular protruding portion 6cu of the high-pressure filter 6 fitted in the main body portion 21. And an annular portion 22j in which a butt end 22fj is formed.
Further, the main body portion 21 is provided in the communication flow passage 8t, and has a reinforcing shape portion 21wm in a shape in which the inner wall of the outer peripheral portion 21p is extended so as to project into the communication flow passage 8t in the high pressure filter space 21sf, The cover part 22 has a reinforcing shape part 22wm in which the inner wall of the outer peripheral part 22p is extended so as to project into the communication channel 8t.

次に、上述した部品等により構成した燃料流路系統について説明する。
筐体10内には、図1、図5および図6に例示してあるように、燃料990中の夾雑物を除去するサクションフィルタ4と、サクションフィルタ4を介して燃料タンク920内の燃料990を吸引し、加圧して吐出する燃料ポンプ5とが、垂直方向に直線状に並んで配置されている。
そして、燃料ポンプ5から吐出された燃料の流れの向きを、上向きから水平にし、さらに下向きに変える連通流路8tが、ケース体2の上部に形成されている。
連通流路8tにより下向きに流れを変えられた燃料990に対しては、夾雑物を除去する高圧フィルタ6と、エンジン910等の燃料消費装置で消費されなかった燃料を、圧を保ちながら排出するための背圧弁7とが、直列に並んで配置され、且つ燃料ポンプ5と水平方向に並列して配置されている。
なお、筐体10の外側には、図示しない油面検出ゲージが設けられている。
Next, a fuel flow path system including the above-described components and the like will be described.
As illustrated in FIGS. 1, 5 and 6, a suction filter 4 for removing impurities in the fuel 990 and a fuel 990 in the fuel tank 920 via the suction filter 4 are provided in the housing 10. And a fuel pump 5 for sucking, pressurizing, and discharging are arranged in a straight line in the vertical direction.
A communication passage 8t that changes the direction of the flow of fuel discharged from the fuel pump 5 from upward to horizontal and downward is formed in the upper portion of the case body 2.
With respect to the fuel 990 whose flow is changed downward by the communication flow path 8t, the high-pressure filter 6 for removing impurities and the fuel not consumed by the fuel consumption device such as the engine 910 are discharged while maintaining the pressure. And a back pressure valve 7 for that are arranged side by side in series and are arranged in parallel with the fuel pump 5 in the horizontal direction.
An oil level detection gauge (not shown) is provided outside the housing 10.

一方、サブタンクとして機能する支持部3sの上端部近傍には、ケース体2との間に、燃料タンク920と通じる隙間8gが形成されており、燃料タンク920に貯蓄された燃料990が重力に逆らわない限り自由に出入りできるようになっている。これにより、筐体10内には、燃料タンク920からエンジン910(エンジンに燃料を噴射するためのインジェクタ等の燃料制御機器もまとめてエンジン910と称する。)に至る燃料流路系統が形成される。
具体的には、サブタンク内の燃料の夾雑物を除去するサクションフィルタ4と、サクションフィルタ4が浄化した燃料を吸上げ、加圧して吐出する燃料ポンプ5と、加圧した燃料を浄化する高圧フィルタ6とが設けられ、サクションフィルタ4からその下流の燃料消費装置であるエンジン910に至る燃料流路8が形成される。
On the other hand, a gap 8g communicating with the fuel tank 920 is formed between the case body 2 and the vicinity of the upper end of the support portion 3s functioning as a sub tank, and the fuel 990 stored in the fuel tank 920 is opposed to gravity. As long as you don't have access, you can come and go freely. As a result, a fuel flow path system is formed within the housing 10 from the fuel tank 920 to the engine 910 (fuel control devices such as injectors for injecting fuel into the engine are also collectively referred to as the engine 910). ..
Specifically, a suction filter 4 that removes fuel contaminants in the sub-tank, a fuel pump 5 that sucks up the fuel purified by the suction filter 4, pressurizes and discharges it, and a high-pressure filter that purifies the pressurized fuel. 6 are provided to form a fuel flow path 8 from the suction filter 4 to the engine 910 which is a fuel consuming device downstream thereof.

燃料流路8の途中部分である高圧フィルタ6の下流部分には、燃料ポンプ5が吐出した燃料のうち、エンジン910で消費されなかった余剰な燃料をサブタンク内に戻すためのリターン流路8rが形成されている。
燃料流路8のうち、リターン流路8rが背圧弁7に、もう一方の燃料消費装置に向かう部分(吐出流路8e)が吐出配管3eに通じている。
In the downstream portion of the high-pressure filter 6, which is an intermediate portion of the fuel flow passage 8, there is a return flow passage 8r for returning excess fuel, which has not been consumed by the engine 910, of the fuel discharged by the fuel pump 5 into the sub tank. Has been formed.
In the fuel flow passage 8, the return flow passage 8r communicates with the back pressure valve 7, and the other portion toward the fuel consuming device (the discharge flow passage 8e) communicates with the discharge pipe 3e.

燃料ポンプ5は、図示しないモータ部の回転軸にポンプ部が直結されたもので、回転軸に沿ってモータ部とポンプ部とが並び、軸方向の一端側から吸入し、他端側で吐出するように構成したものである。そのため、モータ部内を軸方向に沿って燃料が流れる流路が形成されている。また、全体として円筒形になり、軸方向に所定長さが必要となる。   The fuel pump 5 has a pump portion directly connected to a rotation shaft of a motor portion (not shown). The motor portion and the pump portion are arranged along the rotation shaft, and the fuel pump 5 sucks from one end side in the axial direction and discharges from the other end side. It is configured to do. Therefore, a flow path is formed through which the fuel flows in the motor section along the axial direction. In addition, it has a cylindrical shape as a whole and requires a predetermined length in the axial direction.

高圧フィルタ6は、筐体10の耐圧性を考慮して円筒状をなし、燃料が透過可能なフィルタリング部材6fが、例えば、折り曲げられながら円周上に配置されて菊花状をなし、径方向の外側から内側へ燃料が透過するように構成している。耐圧性、および水平方向に並ぶ燃料ポンプ5の径との兼ね合いから、径を極端に大きくすることができず、ろ過面積を確保するため、高圧フィルタ6についても、軸方向に所定長さが必要となる。   The high-pressure filter 6 has a cylindrical shape in consideration of the pressure resistance of the housing 10, and the fuel permeable filtering member 6f is arranged on the circumference while being bent, for example, to have a chrysanthemum shape, and a radial direction. The fuel is configured to permeate from the outside to the inside. Due to the pressure resistance and the diameter of the fuel pumps 5 arranged in the horizontal direction, the diameter cannot be extremely increased, and the high-pressure filter 6 also requires a predetermined length in the axial direction in order to secure a filtration area. Becomes

背圧弁7は、一次側の圧を一定に保つ弁であり、一次側の圧が所定値を越えると弁が開いて燃料990を筐体10のサブタンクとして機能する内部空間内に排出し、所定値以下になると閉じるように構成されている。   The back pressure valve 7 is a valve that keeps the pressure on the primary side constant, and when the pressure on the primary side exceeds a predetermined value, the valve opens and discharges the fuel 990 into the internal space that functions as a sub tank of the housing 10, It is configured to close when the value is less than or equal to the value.

一方、サクションフィルタ4は、燃料が透過可能な不織布等で形成されたフィルタ材で全面が覆われ、燃料990が内部に流入する際に夾雑物を除去し、清浄な燃料990を排出する。   On the other hand, the suction filter 4 is entirely covered with a filter material formed of a fuel-permeable nonwoven fabric or the like, removes impurities when the fuel 990 flows in, and discharges clean fuel 990.

これらの部材の筐体10内への組み込みについて説明する。
高圧フィルタ6は、ケース体2を構成する本体部21にカバー部22が溶着により密着される前に、図7に例示してあるように、本体部21の上方(連通流路8tの底面8fb側)に開口する挿入口21hから高圧フィルタ用空間21sf内に挿入される。
そして、高圧フィルタ6は、図5に示すように、取付孔2jfに嵌め込まれ、高圧フィルタ6の下端側の内周部に設けられた吐出口6xが本体部21に設けられた燃料流路8内に開口する。しかし、下側の環状の突起部6cdの外周面と、取付孔2jfとの間にOリング等のシール材6sを嵌め込むことにより、吐出口6x近傍での、外周側(一次側)から内周側(二次側)への透過前の燃料の抜けを防止している。
The incorporation of these members into the housing 10 will be described.
Before the cover part 22 is adhered to the main body part 21 constituting the case body 2 by welding, the high pressure filter 6 is located above the main body part 21 (bottom surface 8fb of the communication channel 8t, as illustrated in FIG. It is inserted into the high pressure filter space 21sf from the insertion port 21h opened to the side).
Then, as shown in FIG. 5, the high-pressure filter 6 is fitted into the attachment hole 2jf, and the fuel passage 8 is provided with the discharge port 6x provided in the inner peripheral portion on the lower end side of the high-pressure filter 6 in the main body portion 21. Open inside. However, by fitting the sealing material 6s such as an O-ring between the outer peripheral surface of the lower annular protrusion 6cd and the mounting hole 2jf, the inner side from the outer peripheral side (primary side) in the vicinity of the discharge port 6x can be obtained. It prevents the fuel from escaping before it permeates to the peripheral side (secondary side).

そして、図8に示すように、カバー部22と本体部21を溶着する。このとき、本体部21の外周部21pの突き合わせ端21fpとカバー部22の外周部22pの突き合わせ端22fpとを面接触させた後に、面接触した本体部21の外周部21pの突き合わせ端21fpとカバー部22の外周部22pの突き合わせ端22fpとを溶着することによって液密な連通流路8tが形成される。本体部21に嵌め込まれた高圧フィルタ6の上側の環状の突き合わせ端6fjとカバー部22の突き合わせ端22fjとの溶着によって、高圧フィルタ6の外周面と隔壁21wfの内面との隙間が固定され、高圧フィルタ6の吸入口6iとなり、さらに、吸入口6i近傍での、外周側(一次側)から内周側(二次側)への燃料抜けが防止されている。   Then, as shown in FIG. 8, the cover portion 22 and the main body portion 21 are welded. At this time, after the abutting end 21fp of the outer peripheral portion 21p of the main body portion 21 and the abutting end 22fp of the outer peripheral portion 22p of the cover portion 22 are brought into surface contact, the abutting end 21fp of the outer peripheral portion 21p of the main body portion 21 and the cover are brought into surface contact. A liquid-tight communication channel 8t is formed by welding the abutting end 22fp of the outer peripheral portion 22p of the portion 22. The gap between the outer peripheral surface of the high-pressure filter 6 and the inner surface of the partition wall 21wf is fixed by welding the upper annular abutting end 6fj of the high-pressure filter 6 fitted in the body portion 21 and the abutting end 22fj of the cover portion 22. It serves as the intake port 6i of the filter 6, and further prevents fuel leakage from the outer peripheral side (primary side) to the inner peripheral side (secondary side) in the vicinity of the intake port 6i.

さらに、本実施の形態1の特徴は、高圧フィルタ用空間21sfの外周部21pの内壁を、本体部21に内設された連通流路8tに突出するように延伸させた形状の補強形状部21wmと、外周部22pを、本体部21に内設された連通流路8tに突出するように延伸させた形状の補強形状部22wmとを有する。また、補強形状部21wm、22wmは連通流路8tを塞がず、燃料990を整流の状態で連通流路8t内に流すために、鈍角な形状を有している。   Further, the feature of the first embodiment is that a reinforcing shape portion 21wm having a shape in which the inner wall of the outer peripheral portion 21p of the high pressure filter space 21sf is extended so as to project to the communication channel 8t provided in the main body portion 21. And a reinforcing shape portion 22wm having a shape in which the outer peripheral portion 22p is extended so as to project into the communication channel 8t provided in the main body portion 21. Further, the reinforcing shape portions 21wm and 22wm do not block the communication passage 8t and have an obtuse shape in order to flow the fuel 990 into the communication passage 8t in a rectified state.

このようにして、図9に例示されているように形成された筐体10に対し、燃料ポンプ5は、図5、図6に例示してあるようにその吸込み口5iが図中下方に向けて開口し、その吐出口5xが図中上方に向けて開口するように、回転軸が垂直に近い状態になるように開口2hから燃料タンク920内に挿入され、燃料タンク920内に設置されている。このとき、燃料ポンプ5は、Oリング等のシール材5sを介してケース体2の取付孔2jpに吐出口5xが嵌り、ケース体2の取付部2j5に液密に接続されている。一方、燃料ポンプ5の吸込み口5iは、符号を付さない中継部材を用いてサクションフィルタ4と連結されている。   In this way, with respect to the casing 10 formed as shown in FIG. 9, the fuel pump 5 has its suction port 5i directed downward as shown in FIGS. So that the discharge port 5x opens upward in the drawing, the rotary shaft is inserted into the fuel tank 920 through the opening 2h so that the rotation axis is almost vertical, and the discharge port 5x is installed in the fuel tank 920. There is. At this time, the fuel pump 5 is liquid-tightly connected to the mounting portion 2j5 of the case body 2 by fitting the discharge port 5x into the mounting hole 2jp of the case body 2 via the sealing material 5s such as an O-ring. On the other hand, the suction port 5i of the fuel pump 5 is connected to the suction filter 4 by using a relay member without reference numeral.

背圧弁7は、吐出口6x近傍でリターン流路8rとして分岐し、下方に開口するように本体部21に設けられた取付孔2jrに嵌め込まれ、Oリング等のシール材7sによって液密に保たれて高圧フィルタ6の吐出口6xと接続されている。   The back pressure valve 7 branches into a return flow path 8r near the discharge port 6x, is fitted into a mounting hole 2jr provided in the main body portion 21 so as to open downward, and is kept liquid-tight by a sealing material 7s such as an O-ring. It is connected to the discharge port 6x of the high-pressure filter 6 by leaning.

その後、ケース体2を蓋部材3に嵌め込むことで、燃料ポンプ5、サクションフィルタ4、および背圧弁7を固定する。このとき、高圧フィルタ6の吐出口6x近傍のうち、吐出流路8eとなる吐出配管21eは、図示しないシール部材を介して、蓋部材3に形成された吐出配管3eに接続される。これにより、図1で説明した燃料流路8が筐体10内に構築される。   Then, by fitting the case body 2 into the lid member 3, the fuel pump 5, the suction filter 4, and the back pressure valve 7 are fixed. At this time, in the vicinity of the discharge port 6x of the high-pressure filter 6, the discharge pipe 21e serving as the discharge flow path 8e is connected to the discharge pipe 3e formed on the lid member 3 via a seal member (not shown). As a result, the fuel flow path 8 described in FIG. 1 is built in the housing 10.

上述した構成を踏まえ、この燃料供給装置の動作について説明する。
例えば、図1において、燃料990の液面が隙間8gより上位にあるように、燃料タンク920内に燃料990が十分蓄えられている場合には、サブタンクとして機能する支持部3sの内部空間(図5、図6参照)には燃料990で満たされている。この状態で、燃料ポンプ5に電流が供給されると、燃料ポンプ5内の図示しないシャフトを回転軸として、図示しないインペラが内部のロータとともに回転する。この回転に伴い、サブタンク(支持部3sの内部空間)内の燃料990は、サクションフィルタ4で夾雑物が取り除かれ、燃料ポンプ5に導入された後、昇圧されて連通流路8tに吐出される。この吐出された昇圧燃料は、高圧フィルタ6の外周側からフィルタリング部材6fを通過して高圧フィルタ6の内周側に流入し、高圧フィルタ6の吐出口6xから吐出配管3eを経て、エンジン910に供給される。
Based on the configuration described above, the operation of this fuel supply device will be described.
For example, in FIG. 1, when the fuel 990 is sufficiently stored in the fuel tank 920 such that the liquid level of the fuel 990 is above the gap 8g, the internal space of the support portion 3s that functions as a sub tank (see FIG. 5, FIG. 6) is filled with fuel 990. When current is supplied to the fuel pump 5 in this state, the impeller (not shown) rotates together with the rotor therein with the shaft (not shown) in the fuel pump 5 as the rotation axis. With this rotation, the fuel 990 in the sub-tank (internal space of the support portion 3s) is cleaned of foreign matters by the suction filter 4, introduced into the fuel pump 5, and then pressurized and discharged into the communication passage 8t. .. The discharged boosted fuel passes through the filtering member 6f from the outer peripheral side of the high-pressure filter 6 and flows into the inner peripheral side of the high-pressure filter 6, and flows from the discharge port 6x of the high-pressure filter 6 through the discharge pipe 3e to the engine 910. Supplied.

一方、エンジン910で消費しきれない余剰となった燃料990は、燃料流路8から分岐するリターン流路8rを経て背圧弁7から、サブタンクとして機能する支持部3sの内部空間に戻される。そして、背圧弁7の背圧制御機能により、エンジン910への供給圧は所定値に保たれる。その結果、エンジン910での消費量が急変しても、エンジン910が必要とする量の燃料990を一定圧で供給することが可能となる。なお、背圧弁7内では、急激な圧力変動が生じるため、気泡が発生することがある。そのため、サブタンクとして機能する支持部3sの内部空間内には、液体燃料だけでなく、気泡も排出されるが、気泡は隙間8gから抜け出るため、気泡を含まない燃料をサクションフィルタ4から吸い込むことができる。   On the other hand, the surplus fuel 990 that cannot be consumed by the engine 910 is returned from the back pressure valve 7 to the internal space of the support portion 3s that functions as a sub-tank via the return flow passage 8r branched from the fuel flow passage 8. The back pressure control function of the back pressure valve 7 keeps the supply pressure to the engine 910 at a predetermined value. As a result, even if the consumption amount in the engine 910 suddenly changes, it is possible to supply the fuel 990 in an amount required by the engine 910 at a constant pressure. In the back pressure valve 7, bubbles may be generated due to abrupt pressure fluctuation. Therefore, not only the liquid fuel but also the bubbles are discharged into the inner space of the support portion 3s functioning as a sub tank, but the bubbles escape from the gap 8g, so that the fuel not containing the bubbles can be sucked from the suction filter 4. it can.

このとき、ケース体2内では、燃料ポンプ5の取付孔2jpより下流側から吐出配管21eより上流側の区間、および背圧弁7の取付孔2jrより上流側の区間において、内部に高圧の燃料が流れる。一方、ケース体2内において、燃料ポンプ5の取付孔2jpより上流側の部分、あるいは背圧弁7の取付孔2jrより下流側の部分は常圧である。つまり、連通流路8tを囲む壁面と、高圧フィルタ6を収納する壁面では、外部との間に圧力差が生じる。   At this time, in the case body 2, in the section from the downstream side of the mounting hole 2jp of the fuel pump 5 to the upstream side of the discharge pipe 21e and the section upstream of the mounting hole 2jr of the back pressure valve 7, high-pressure fuel is internally stored. Flowing. On the other hand, in the case body 2, a portion upstream of the mounting hole 2jp of the fuel pump 5 or a portion downstream of the mounting hole 2jr of the back pressure valve 7 is at normal pressure. That is, a pressure difference occurs between the wall surface surrounding the communication channel 8t and the wall surface housing the high-pressure filter 6 with the outside.

これに対して、本体部21およびカバー部22においては、上述したように、高圧フィルタ用空間21sfを囲む壁材の厚み、および隔壁21wtよりも上部に配置された壁材の厚みは、耐圧性を考慮して、他の部分よりも肉厚に形成している。そのため、エンジン910への供給に必要な圧力をかけただけで破損するようなことはない。また、外周部21p、22pの突き合わせ端21fp、22fpどうしの溶着面積だけでも、溶着強度は、想定される圧力が高くなったからといって、本体部21とカバー部22とが継目J2部分で、直ちに離れてしまうようなことが起こることはない。   On the other hand, in the main body portion 21 and the cover portion 22, as described above, the thickness of the wall material surrounding the high pressure filter space 21sf and the thickness of the wall material arranged above the partition wall 21wt are pressure resistant. Considering the above, it is formed to be thicker than other portions. Therefore, it will not be damaged just by applying the pressure necessary for supplying to the engine 910. Further, even if only the welding area between the abutting ends 21fp and 22fp of the outer peripheral portions 21p and 22p, the welding strength is that the main body portion 21 and the cover portion 22 are at the joint J2 portion because the assumed pressure is high. No immediate separation will occur.

しかしながら、車両用の燃料供給装置1においては、定常的に圧力がかかるものではく、エンジン910の起動・停止のたびに圧力が変化する。その際、高圧フィルタ6の部分においては、隔壁21wfが、円筒形をなし、断面が円形となるので、内圧がかかっても部材が均等に伸びるだけで、曲率が大きく変化することはない。また、高圧フィルタ6の円筒形の部分の両端は、仮に平坦であっても、隣接する曲線状の側面によって補強されているため、当該両端の部分においても曲率が大きく変化することはない。   However, in the fuel supply device 1 for a vehicle, the pressure is not constantly applied, and the pressure changes every time the engine 910 is started and stopped. At that time, in the portion of the high-pressure filter 6, the partition wall 21wf has a cylindrical shape and a circular cross section, so that even if internal pressure is applied, the member only extends uniformly and the curvature does not change significantly. Further, even if both ends of the cylindrical portion of the high-pressure filter 6 are flat, they are reinforced by the adjacent curved side surfaces, so that the curvature does not change greatly at the both end portions.

一方、連通流路8tとなる空間は、2つの樹脂製部材(本体部21およびカバー部)を溶着して形成するものであるが、溶着の際、軟化による変形が2つの樹脂製部材に生じないよう、それぞれの継目J2となる突き合わせ端21fp,22fpの接合面が、接合方向に沿って曲線とならないようにする必要がある。つまり、継目J2をまたぐ接合面の部分は面接触するように平坦に形成する必要がある。そして、外周部21p、22pの連通流路8tに沿った大部分が図示のように直線的に形成されるため、連通流路8tの両側面のうち、連通流路8t直線状の部分に沿った部分は扁平な平板状になる。   On the other hand, the space serving as the communication channel 8t is formed by welding two resin members (the main body portion 21 and the cover portion), but during welding, deformation due to softening occurs in the two resin members. It is necessary to prevent the joint surfaces of the butt ends 21fp and 22fp, which are the joints J2, from forming a curve along the joint direction so that the joints J2 do not exist. That is, the portion of the joint surface that crosses the joint J2 needs to be formed flat so as to make surface contact. Most of the outer peripheral portions 21p and 22p along the communication channel 8t are formed linearly as shown in the figure, and therefore, along the communication channel 8t linear portion of both side surfaces of the communication channel 8t. The flat part is flat.


そのため、連通流路8tの両側面に燃料による内圧がかかった際に、継目J2部分は、単に連通流路8tの長手方向に伸びるだけではなく、両側面の部分を、連通流路8tに垂直な方向に凹状、凸状に変形させる力が働くが、カバー部22の天面8ftには、図8で説明したように、突き合わせ端22fpに達しない所定高さの部分まで、流路幅方向に沿って延びる補強形状部が図示のように形成されており、天面8ftを形成する壁材の変形と、継目J2に連なる側面22s部分の壁材の変形を抑える働きがある。
Therefore, when the internal pressure due to the fuel is applied to both side surfaces of the communication passage 8t, the joint J2 portion does not simply extend in the longitudinal direction of the communication passage 8t, but the both side portions are connected to the communication passage 8t. Although a force that deforms in a vertical direction into a concave shape or a convex shape acts, the top surface 8ft of the cover portion 22 has a flow path width up to a predetermined height portion that does not reach the abutting end 22fp as described in FIG. A reinforcing shape portion extending along the direction is formed as shown in the drawing, and has a function of suppressing deformation of the wall material forming the top surface 8ft and deformation of the wall material of the side surface 22s portion connected to the joint J2.

しかし、補強形状部は流路を防ぐ方向に延びるため、突き合わせ端22fpより一定以上の距離を離して配置する必要があり、変形抑制効果は限定的である。また、高圧フィルタ6とカバー部22との溶着は、カバー部22と本体部21の一固定には寄与しない。そのため、単に外周部21pと22pのみでケース体2の溶着が行われていた場合、エンジンの起動停止に伴う燃料ポンプの起動・停止のたびに、内圧による変形と圧の解除による復元が、継目J2付近で繰り返されることになる。さらに、継目J2において、高圧フィルタ用空間21sfは高圧フィルタ6を収容するため径方向の大きさが他部より大きいため、他空間より燃料990の内圧による応力が大きくなる。   However, since the reinforcing shape portion extends in the direction that prevents the flow path, it is necessary to dispose the reinforcing shape portion at a distance of a certain distance or more from the abutting end 22fp, and the deformation suppressing effect is limited. The welding of the high-pressure filter 6 and the cover 22 does not contribute to the fixing of the cover 22 and the main body 21. Therefore, when the case body 2 is simply welded only at the outer peripheral portions 21p and 22p, the deformation due to the internal pressure and the restoration due to the release of the pressure are seamless when the fuel pump is started / stopped due to the start / stop of the engine. It will be repeated near J2. Further, in the joint J2, since the high pressure filter space 21sf accommodates the high pressure filter 6, the size in the radial direction is larger than the other portions, so that the stress due to the internal pressure of the fuel 990 is larger than the other space.

溶着時の過熱温度の制御、本体部21へのカバー部22の押し付け力の量等の条件により、継目J2での溶着強度を向上させることは可能ではあるが、仮に溶着強度を向上し得る条件を見出したとしても、物のばらつき、環境条件に左右され易く、安定して強度の向上を保つことは困難である。   Although it is possible to improve the welding strength at the joint J2 by controlling the superheat temperature during welding, the amount of pressing force of the cover portion 22 against the main body portion 21, and the like, it is assumed that the welding strength can be improved. Even if the above is found, it is difficult to stably maintain the strength improvement because it is easily influenced by the variation of the objects and the environmental conditions.

そこで、本願の実施の形態1の燃料供給装置では、本体部21の連通流路8tに、高圧フィルタ用空間21sfの外周部21pが突出するように延伸させて形成された補強形状部21wmと、カバー部22の外周部22pを外周部21pと同様に延伸させて形成された補強形状部22wmを形成すると共に、補強形状部21wm、22wmを、突き合わせ端21fpと突き合わせ端22fpの高さまで延ばすように形成することにより、内圧による応力が集中している箇所にて、本体部21およびカバー部22のいずれお固体の壁材で強固に固定され、内圧による変形と圧の解除による復元とによる前述の凹凸いずれの方向に対しても、側面22sの変形を抑制することが可能となる。   Therefore, in the fuel supply device according to the first embodiment of the present application, a reinforcing shape portion 21wm formed by extending the communication passage 8t of the main body portion 21 so that the outer peripheral portion 21p of the high pressure filter space 21sf projects. The outer peripheral portion 22p of the cover portion 22 is extended in the same manner as the outer peripheral portion 21p to form the reinforcing shape portion 22wm, and the reinforcing shape portions 21wm and 22wm are extended to the height of the abutting end 21fp and the abutting end 22fp. By forming it, at a location where stress due to the internal pressure is concentrated, both the main body 21 and the cover 22 are firmly fixed by the solid wall material, and the deformation due to the internal pressure and the restoration due to the release of the pressure described above are performed. It is possible to suppress the deformation of the side surface 22s in any direction of the unevenness.

以上のように、本願の実施の形態1にかかる燃料供給装置は、軸方向に直結するモータ部とポンプ部、および前記モータ部を通る燃料流路を有し、前記軸方向の一方側に燃料の吸込み口5iが、他方側に加圧した燃料の吐出口5xが設けられた燃料ポンプ5と、円筒状をなし、燃料ポンプ5から吐出された燃料をろ材に対して径方向に透過させて浄化する円筒状の高圧フィルタ6と、燃料タンク920の底面側の開口部に固定される蓋部材3と、蓋部材3から立ち上がるように蓋部材3に保持され、吐出口5xが上方で開口するように、燃料ポンプ5に軸を立てて収容する第一収容空間(ポンプ用空間21sp)と、第一収容空間と水平方向に隣接し、燃料の吸入口6iが上方で開口するように高圧フィルタ6を軸を立てて収容する第二収容空間(高圧フィルタ用空間21sf)と、第一収容空間と第二収容空間の上方で水平方向に延び、吐出口5xと吸入口6iとを連通する連通流路8tを形成する樹脂製のケース体2とを備え、連通流路8tは、底面8fb側で高圧フィルタ6を挿入するための挿入口21hが開口し、ケース体2は、連通流路8tの天面8ft側と底面8fb側に分かれるように、水平な切断面で分割された2つの成形体(本体部21、カバー部22)の、外周部21p、22pの突き合わせ端21fp、22fpどうしの溶着による接合体であり、2つの成形体のそれぞれには、連通流路8tの底面8fbあるいは天面8ftにおいて、補強形状部21wm、22wmが形成され、補強形状部21wm、22wmの突き合わせ端21fm、22fmも、外周部の突き合わせ端の溶着の際に、互いに接合されるように構成されている。従って、燃料の圧力変動による疲労強度低下および高燃圧化による負荷増大を考慮しても、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることができる。   As described above, the fuel supply device according to the first embodiment of the present application has the motor part and the pump part that are directly connected in the axial direction, and the fuel flow path that passes through the motor part, and the fuel supply device is provided on one side in the axial direction. Has a cylindrical shape with the fuel pump 5 provided with a discharge port 5x for the pressurized fuel on the other side, and allows the fuel discharged from the fuel pump 5 to permeate the filter medium in the radial direction. The cylindrical high-pressure filter 6 to be purified, the lid member 3 fixed to the opening on the bottom side of the fuel tank 920, the lid member 3 so as to stand up from the lid member 3, and the discharge port 5x opens upward. As described above, the first accommodation space (pump space 21sp) for vertically accommodating the fuel pump 5 is adjacent to the first accommodation space in the horizontal direction, and the high-pressure filter is opened so that the fuel intake port 6i opens upward. Second housing for housing 6 upright A case body made of resin which extends horizontally in the space (high pressure filter space 21sf) and above the first storage space and the second storage space and forms a communication flow path 8t which connects the discharge port 5x and the suction port 6i. 2, the communication channel 8t has an opening 21h for inserting the high-pressure filter 6 on the bottom surface 8fb side, and the case body 2 is divided into a top surface 8ft side and a bottom surface 8fb side of the communication channel 8t. As described above, the two molded bodies (the main body portion 21 and the cover portion 22) divided by the horizontal cut surface are joined by welding the abutting ends 21fp and 22fp of the outer peripheral portions 21p and 22p. Reinforcing shape portions 21wm and 22wm are formed on the bottom surface 8fb or the top surface 8ft of the communication flow path 8t, and the abutting ends 21fm and 22fm of the reinforcing shape portions 21wm and 22wm are also formed on the outer circumference. During welding of the butted end, and is configured to be joined together. Therefore, the strength of the welded portion can be improved and a highly reliable fuel supply device can be obtained even in consideration of the decrease in fatigue strength due to fuel pressure fluctuations and the increase in load due to higher fuel pressure.

また、補強形状部21wm、22wmは、できるだけ燃料の流れを遮らないよう、鋭角な形状を持たず、鈍角としている。
なお、本実施の形態1の燃料供給装置は、概念的には、本体部21のカバー部22と面接触する面およびカバー部の本体部と面接触する面の双方に、溶着の部分の強度が上がるように面接触する面が拡大した形状が施され、当該形状が本体部21のカバー部22と面接触する面およびカバー部22の本体部21と面接触する面の双方から連通流路8tに突出した形状(補強形状部21wm,22wm)である。
Further, the reinforcing shape portions 21wm and 22wm do not have an acute angle shape and have an obtuse angle so as not to block the flow of fuel as much as possible.
Note that, conceptually, the fuel supply device according to the first embodiment has the strength of the welded portion on both the surface of the main body portion 21 in surface contact with the cover portion 22 and the surface of the cover portion in surface contact with the main body portion. Is formed such that the surface contacting surface of the main body 21 is in contact with the cover portion 22 and the cover 22 is in surface contact with the body portion 21. It is a shape (reinforcing shape portions 21wm, 22wm) protruding to 8t.

実施の形態2.
以下、実施の形態2を、燃料供給装置が自動二輪車用の燃料タンク底面から燃料タンク内に直立するように設置される場合を例として、図10および図11を使って説明する。
図10は、本願の実施の形態2の燃料供給装置におけるケース体を構成する2つの部材である本体部およびカバー部を、それらを矢印のように組み付ける様子を、それらを溶着する前(樹脂部品を溶かして接合する前)の状態で示す図であって、本体部は平面図で、カバー部は斜視図で、それぞれ溶着面側が例示されている。図11は図10の事例についての補足説明を行うための平面図である。
図10に例示のように、本体部21およびカバー部22の、高圧フィルタ6に対応する部分の突き合わせ端21fp、22fpの面に、補強形状部23wm、24wmが設けられており、補強形状部23wm、24wmは、図11に例示のように、ケース体2の長手方向頂点に接する最小円弧2cに対し、この最小円弧2cの枠を超えない範囲内で、任意の位置に1ヶ所、もしくは複数個所設けられる。
これにより、内圧による応力が集中している箇所にて、本体部21とカバー部22とが固体の壁材で強固に固定され、内圧による変形と圧の解除による復元とによる前述の凹凸いずれの方向に対しても、側面22sの変形を抑制することが可能となる。
Embodiment 2.
Hereinafter, the second embodiment will be described with reference to FIGS. 10 and 11 by taking as an example the case where the fuel supply device is installed so as to stand upright in the fuel tank from the bottom surface of the fuel tank for the motorcycle.
FIG. 10 shows a state in which the main body portion and the cover portion, which are the two members constituting the case body in the fuel supply device according to the second embodiment of the present application, are assembled as shown by the arrows before they are welded (resin component FIG. 4 is a view showing a state before melting and joining the main body portion is a plan view and a cover portion is a perspective view, each illustrating a welding surface side. FIG. 11 is a plan view for supplementary explanation of the case of FIG.
As illustrated in FIG. 10, the reinforcing shape portions 23wm and 24wm are provided on the surfaces of the abutting ends 21fp and 22fp of the main body portion 21 and the cover portion 22 corresponding to the high-pressure filter 6, and the reinforcing shape portion 23wm. , 24wm, as illustrated in FIG. 11, with respect to the minimum arc 2c contacting the apex in the longitudinal direction of the case body 2, within a range not exceeding the frame of this minimum arc 2c, one position or a plurality of positions at any position. It is provided.
As a result, at the location where the stress due to the internal pressure is concentrated, the main body portion 21 and the cover portion 22 are firmly fixed by the solid wall material, and any of the above-mentioned unevenness due to the deformation due to the internal pressure and the restoration due to the release of the pressure. Also in the direction, it is possible to suppress the deformation of the side surface 22s.

以上のように、本願の実施の形態2にかかる燃料供給装置は、軸方向に直結するモータ部とポンプ部、および前記モータ部を通り燃料流路を有し、前記軸方向の一方側に燃料の吸込み口5iが、他方側に加圧した燃料の吐出口5xが設けられた燃料ポンプ5と、円筒状をなし、燃料ポンプ5から吐出された燃料をろ材に対して径方向に透過させて浄化する円筒状の高圧フィルタ6と、燃料タンク920の底面側の開口部に固定される蓋部材3と、蓋部材3から立ち上がるように蓋部材3に保持され、吐出口5xが上方で開口するように、燃料ポンプ5に軸を立てて収容する第一収容空間(ポンプ用空間21sp)と、第一収容空間と水平方向に隣接し、燃料の吸入口6iが上方で開口するように高圧フィルタ6を軸を立てて収容する第二収容空間(高圧フィルタ用空間21sf)と、第一収容空間と第二収容空間の上方で水平方向に延び、吐出口5xと吸入口6iとを連通する連通流路8tを形成する樹脂製のケース体2とを備え、連通流路8tは、底面8fb側で高圧フィルタ6を挿入するための挿入口21hが開口し、ケース体2は、連通流路8tの天面8ft側と底面8fb側に分かれるように、水平な切断面で分割された2つの成形体(本体部21、カバー部22)の、外周部21p、22pの突き合わせ端21fp、22fpどうしの溶着による接合体であり、2つの成形体のそれぞれには、連通流路8tの底面8fbあるいは天面8ftにおいて、補強形状部23wm、24wmが形成され、補強形状部23wm、24wmの突き合わせ端23fm、24fmも、外周部の突き合わせ端の溶着の際に、互いに接合されるように構成されている。従って、燃料の圧力変動による疲労強度低下および高燃圧化による負荷増大を考慮しても、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることができる。   As described above, the fuel supply device according to the second embodiment of the present application has the motor portion and the pump portion that are directly connected in the axial direction, and the fuel flow path that passes through the motor portion, and the fuel is provided on one side in the axial direction. Has a cylindrical shape with the fuel pump 5 provided with a discharge port 5x for the pressurized fuel on the other side, and allows the fuel discharged from the fuel pump 5 to permeate the filter medium in the radial direction. The cylindrical high-pressure filter 6 to be purified, the lid member 3 fixed to the opening on the bottom side of the fuel tank 920, the lid member 3 so as to stand up from the lid member 3, and the discharge port 5x opens upward. As described above, the first accommodation space (pump space 21sp) for vertically accommodating the fuel pump 5 is adjacent to the first accommodation space in the horizontal direction, and the high-pressure filter is opened so that the fuel intake port 6i opens upward. Second housing for housing 6 upright A case body made of resin which extends horizontally in the space (high pressure filter space 21sf) and above the first storage space and the second storage space and forms a communication flow path 8t which connects the discharge port 5x and the suction port 6i. 2, the communication channel 8t has an opening 21h for inserting the high-pressure filter 6 on the bottom surface 8fb side, and the case body 2 is divided into a top surface 8ft side and a bottom surface 8fb side of the communication channel 8t. As described above, the two molded bodies (the main body portion 21 and the cover portion 22) divided by the horizontal cut surface are joined by welding the abutting ends 21fp and 22fp of the outer peripheral portions 21p and 22p. Reinforcing shape portions 23wm and 24wm are formed on the bottom surface 8fb or the top surface 8ft of the communication channel 8t, respectively, and the abutting ends 23fm and 24fm of the reinforcing shape portions 23wm and 24wm are also formed on the outer circumference. During welding of the butted end, and is configured to be joined together. Therefore, the strength of the welded portion can be improved and a highly reliable fuel supply device can be obtained even if the fatigue strength decrease due to fuel pressure fluctuation and the load increase due to high fuel pressure are taken into consideration.

また、補強形状部23wm、24wmは、ケース体2の長手方向頂点に接する最小円弧2cに対し、この最小円弧2cの枠を超えない範囲内で、任意の位置に1ヶ所、もしくは複数個所を有する。
なお、本実施の形態2の燃料供給装置は、概念的には、本体部21のカバー部22と面接触する面およびカバー部の本体部と面接触する面の双方に、溶着の部分の強度が上がるように面接触する面が拡大した形状が施され、当該形状が、連通流路8tと反対の側に突出した形状(補強形状部23wm,24wm)である。
Further, the reinforcing shape portions 23wm and 24wm have one or a plurality of positions at arbitrary positions within a range not exceeding the frame of the minimum arc 2c with respect to the minimum arc 2c contacting the apex in the longitudinal direction of the case body 2. ..
Note that, conceptually, the fuel supply device according to the second embodiment has the strength of the welded portion on both the surface of the main body portion 21 in surface contact with the cover portion 22 and the surface of the cover portion in surface contact with the main body portion. Is formed such that the surface contacting surface is enlarged so as to rise, and the shape is a shape (reinforcing shape portions 23wm, 24wm) protruding to the side opposite to the communication channel 8t.

実施の形態3.
以下、実施の形態3を、燃料供給装置が自動二輪車用の燃料タンク底面から燃料タンク内に直立するように設置される場合を例として、図12を使って説明する。
図12は、本願の実施の形態3の燃料供給装置におけるケース体を構成する2つの部材である本体部およびカバー部を、それらを矢印のように組み付ける様子を、それらを溶着する前(樹脂部品を溶かして接合する前)の状態で示す図であって、本体部は平面図で、カバー部は斜視図で、それぞれ溶着面側が例示されている。
図12に例示のように、突き合わせ端25fp、26fpの接合面は、長手方向の全域に亘って、内壁面側から外壁面側に傾斜した面となっており、かつ傾斜したそれぞれの接合面は、相互間に隙間なく平行をなした形状面に形成され、それぞれの接合面は面接触するように形成され、これら突き合わせ端25fp、26fpは溶着により固定されている。その結果、溶着面積が大きくなるため、溶着強度が向上し、圧力変動による疲労強度低下および高燃圧化による負荷増大を考慮しても、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることができる。
Embodiment 3.
Hereinafter, the third embodiment will be described with reference to FIG. 12, taking as an example the case where the fuel supply device is installed so as to stand upright in the fuel tank from the bottom surface of the fuel tank for the motorcycle.
FIG. 12 shows a state in which a main body portion and a cover portion, which are two members constituting a case body in the fuel supply device according to the third embodiment of the present application, are assembled as shown by an arrow before welding them (resin parts FIG. 4 is a view showing a state before melting and joining the main body portion is a plan view and a cover portion is a perspective view, each illustrating a welding surface side.
As illustrated in FIG. 12, the joint surfaces of the abutting ends 25fp and 26fp are inclined surfaces from the inner wall surface side to the outer wall surface side over the entire region in the longitudinal direction, and the respective inclined joint surfaces are , Are formed in parallel with each other with no gap between them, and their joint surfaces are formed so as to be in surface contact with each other, and these abutting ends 25fp and 26fp are fixed by welding. As a result, the welding area is increased, so that the welding strength is improved, and the strength of the welded portion is improved and the reliability of the fuel supply device is improved even if the fatigue strength decrease due to pressure fluctuation and the load increase due to high fuel pressure are taken into consideration. Can be obtained.

以上のように、本願の実施の形態3にかかる燃料供給装置は、軸方向に直結するモータ部とポンプ部、および前記モータ部を通り燃料流路を有し、前記軸方向の一方側に燃料の吸込み口5iが、他方側に加圧した燃料の吐出口5xが設けられた燃料ポンプ5と、円筒状をなし、燃料ポンプ5から吐出された燃料をろ材に対して径方向に透過させて浄化する円筒状の高圧フィルタ6と、燃料タンク920の底面側の開口部に固定される蓋部材3と、蓋部材3から立ち上がるように蓋部材3に保持され、吐出口5xが上方で開口するように、燃料ポンプ5に軸を立てて収容する第一収容空間(ポンプ用空間21sp)と、第一収容空間と水平方向に隣接し、燃料の吸入口6iが上方で開口するように高圧フィルタ6を軸を立てて収容する第二収容空間(高圧フィルタ用空間21sf)と、第一収容空間と第二収容空間の上方で水平方向に延び、吐出口5xと吸入口6iとを連通する連通流路8tを形成する樹脂製のケース体2とを備え、連通流路8tは、底面8fb側で高圧フィルタ6を挿入するための挿入口21hが開口し、ケース体2は、連通流路8tの天面8ft側と底面8fb側に分かれるように、水平な切断面で分割された2つの成形体(本体部21、カバー部22)の、外周部21p、22pの突き合わせ端25fp、26fpどうしの溶着による接合体であり、突き合わせ面25wm、26wmの溶着面全周に亘って、内壁面側から外壁面側に傾斜した面となっており、かつ傾斜したそれぞれの接合面は、相互間に隙間なく平行をなした形状面に形成され、それぞれの接合面は面接触するように形成され、これら突き合わせ端25fp、26fpは溶着により固定されている。その結果、溶着面積が大きくなるため、溶着強度が向上し、圧力変動による疲労強度低下および高燃圧化による負荷増大を考慮しても、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることができる。
なお、突き合わせ面25wm、26wmの傾斜方向は、前述の実施の形態3における傾斜方向と逆にしても同様な効果を奏する。
なお、本実施の形態3の燃料供給装置は、概念的には、本体部21のカバー部22と面接触する面およびカバー部の本体部と面接触する面の双方に、溶着の部分の強度が上がるように面接触する面25wm,26wmが拡大した形状が施され、前記形状が、本体部21のカバー部22と面接触する面25wmおよびカバー部22の本体部21と面接触する面26wmの双方が内壁面側から外壁面側にまたは外壁面側から内壁面側に傾斜した形状である。
As described above, the fuel supply device according to the third embodiment of the present application has the motor part and the pump part that are directly connected in the axial direction, the fuel flow path that passes through the motor part, and the fuel is provided on one side in the axial direction. Has a cylindrical shape with the fuel pump 5 provided with a discharge port 5x for the pressurized fuel on the other side, and allows the fuel discharged from the fuel pump 5 to permeate the filter medium in the radial direction. The cylindrical high-pressure filter 6 to be purified, the lid member 3 fixed to the opening on the bottom side of the fuel tank 920, the lid member 3 so as to stand up from the lid member 3, and the discharge port 5x opens upward. As described above, the first accommodation space (pump space 21sp) for vertically accommodating the fuel pump 5 is adjacent to the first accommodation space in the horizontal direction, and the high-pressure filter is opened so that the fuel intake port 6i opens upward. Second housing for housing 6 upright A case body made of resin which extends horizontally in the space (high pressure filter space 21sf) and above the first storage space and the second storage space and forms a communication flow path 8t which connects the discharge port 5x and the suction port 6i. 2, the communication channel 8t has an opening 21h for inserting the high-pressure filter 6 on the bottom surface 8fb side, and the case body 2 is divided into a top surface 8ft side and a bottom surface 8fb side of the communication channel 8t. As described above, the two molded bodies (the main body portion 21 and the cover portion 22) divided by the horizontal cut surface are joined by welding the abutting ends 25fp and 26fp of the outer peripheral portions 21p and 22p, and the abutting surface 25wm, Over the entire circumference of the welding surface of 26 wm, it is a surface that is inclined from the inner wall surface side to the outer wall surface side, and the respective inclined joint surfaces are formed into parallel shaped surfaces with no gaps between them. Each connection Surface is formed to be in surface contact, they butt end 25fp, 26fp is fixed by welding. As a result, the welding area is increased, so that the welding strength is improved, and the strength of the welded portion is improved and the reliability of the fuel supply device is improved even if the fatigue strength decrease due to pressure fluctuation and the load increase due to high fuel pressure are taken into consideration. Can be obtained.
The same effect can be obtained even if the inclination direction of the abutting surfaces 25wm and 26wm is opposite to the inclination direction in the third embodiment described above.
Note that, conceptually, the fuel supply device according to the third embodiment has the strength of the welded portion on both the surface of the body portion 21 in surface contact with the cover portion 22 and the surface of the cover portion in surface contact with the body portion. The surfaces 25wm and 26wm that come into surface contact with each other so as to rise are given an enlarged shape. Both have a shape inclined from the inner wall surface side to the outer wall surface side or from the outer wall surface side to the inner wall surface side.

実施の形態4.
以下、実施の形態4を、燃料供給装置が自動二輪車用の燃料タンク底面から燃料タンク内に直立するように設置される場合を例として、図13を使って説明する。
図13は、本願の実施の形態4の燃料供給装置におけるケース体を構成する2つの部材である本体部およびカバー部を、それらを矢印のように組み付ける様子を、それらを溶着する前(樹脂部品を溶かして接合する前)の状態で示す図であって、本体部は平面図で、カバー部は斜視図で、それぞれ溶着面側が例示されている。
図13に例示のように、突き合わせ端27fp、28fpの接合面の全面に亘って、くさび形の形状が連続して波状に設けられており、それぞれの接合面を突き合わせた際に、突き合わせ端27fp、28fpの接合面は相互間に隙間なく合致するよう配置されており、これら突き合わせ端25fp、26fpは溶着により固定されている。これにより、水平面どうしで溶着するより、溶着面積が大きくなるため、溶着強度が向上し、圧力変動による疲労強度低下および高燃圧化による負荷増大を考慮しても、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることができる。
Fourth Embodiment
Hereinafter, Embodiment 4 will be described with reference to FIG. 13 as an example in which the fuel supply device is installed upright in the fuel tank from the bottom surface of the fuel tank for the motorcycle.
FIG. 13 shows a state in which the main body portion and the cover portion, which are the two members constituting the case body in the fuel supply device according to the fourth embodiment of the present application, are assembled as shown by arrows before they are welded (resin component FIG. 4 is a view showing a state before melting and joining the main body portion is a plan view and a cover portion is a perspective view, each illustrating a welding surface side.
As illustrated in FIG. 13, a wedge-shaped shape is continuously provided in a wave shape over the entire joint surface of the abutting ends 27fp and 28fp, and when the abutting ends 27fp are abutted with each other. , 28 fp are arranged so that the joint surfaces thereof match each other without a gap, and the butted ends 25 fp, 26 fp are fixed by welding. As a result, since the welding area is larger than welding between horizontal surfaces, the welding strength is improved, and the strength of the welded portion is improved even if the fatigue strength decrease due to pressure fluctuation and the load increase due to high fuel pressure are taken into consideration. It is possible to obtain a highly reliable fuel supply device.

以上のように、本願の実施の形態4にかかる燃料供給装置は、軸方向に直結するモータ部とポンプ部、および前記モータ部を通る燃料流路を有し、前記軸方向の一方側に燃料の吸込み口5iが、他方側に加圧した燃料の吐出口5xが設けられた燃料ポンプ5と、円筒状をなし、燃料ポンプ5から吐出された燃料をろ材に対して径方向に透過させて浄化する円筒状の高圧フィルタ6と、燃料タンク920の底面側の開口部に固定される蓋部材3と、蓋部材3から立ち上がるように蓋部材3に保持され、吐出口5xが上方で開口するように、燃料ポンプ5に軸を立てて収容する第一収容空間(ポンプ用空間21sp)と、第一収容空間と水平方向に隣接し、燃料の吸入口6iが上方で開口するように高圧フィルタ6を軸を立てて収容する第二収容空間(高圧フィルタ用空間21sf)と、第一収容空間と第二収容空間の上方で水平方向に延び、吐出口5xと吸入口6iとを連通する連通流路8tを形成する樹脂製のケース体2とを備え、連通流路8tは、底面8fb側で高圧フィルタ6を挿入するための挿入口21hが開口し、ケース体2は、連通流路8tの天面8ft側と底面8fb側に分かれるように、水平な切断面で分割された2つの成形体(本体部21、カバー部22)の、外周部21p、22pの突き合わせ端27fp、28fpどうしの溶着による接合体であり、突き合わせ面27wm、28wmの溶着面全周に亘って、くさび形の形状が連続して波状に設けられており、それぞれの接合面を突き合わせた際に、突き合わせ端27fp、28fpの接合面は相互間に隙間なく合致するよう配置されており、これら突き合わせ端25fp、26fpは溶着により固定されている。その結果、圧力変動による疲労強度低下および高燃圧化による負荷増大を考慮しても、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることができる。   As described above, the fuel supply device according to the fourth embodiment of the present application has the motor portion and the pump portion that are directly connected in the axial direction, and the fuel flow path that passes through the motor portion, and the fuel is provided on one side in the axial direction. Has a cylindrical shape with the fuel pump 5 provided with a discharge port 5x for the pressurized fuel on the other side, and allows the fuel discharged from the fuel pump 5 to permeate the filter medium in the radial direction. The cylindrical high-pressure filter 6 to be purified, the lid member 3 fixed to the opening on the bottom side of the fuel tank 920, the lid member 3 so as to stand up from the lid member 3, and the discharge port 5x opens upward. As described above, the first accommodation space (pump space 21sp) for vertically accommodating the fuel pump 5 is adjacent to the first accommodation space in the horizontal direction, and the high-pressure filter is opened so that the fuel intake port 6i opens upward. Second housing for housing 6 upright A case body made of resin which extends horizontally in the space (high pressure filter space 21sf) and above the first storage space and the second storage space and forms a communication flow path 8t which connects the discharge port 5x and the suction port 6i. 2, the communication channel 8t has an opening 21h for inserting the high-pressure filter 6 on the bottom surface 8fb side, and the case body 2 is divided into a top surface 8ft side and a bottom surface 8fb side of the communication channel 8t. As described above, it is a joined body formed by welding the abutting ends 27fp and 28fp of the outer peripheral portions 21p and 22p of the two molded bodies (the main body portion 21 and the cover portion 22) divided by the horizontal cutting surface, and the abutting surface 27wm, A wedge-shaped shape is continuously provided in a wavy shape over the entire circumference of the 28 wm welded surface, and when the respective joint surfaces are butted, there is no gap between the butted ends 27fp and 28fp. Are arranged to meet, they butt end 25fp, 26fp is fixed by welding. As a result, the strength of the welded portion can be improved and a highly reliable fuel supply device can be obtained even in consideration of the decrease in fatigue strength due to pressure fluctuations and the increase in load due to higher fuel pressure.

なお、本実施の形態4の燃料供給装置は、概念的には、本体部21のカバー部22と面接触する面およびカバー部の本体部と面接触する面の双方に、溶着の部分の強度が上がるように面接触する面25wm,26wmが拡大した形状が施され、当該形状が、本体部21のカバー部22と面接触する面27wmおよびカバー部22の本体部21と面接触する面28wmの双方にくさび形の形状が連続して波状に形成された形状である。   Note that, conceptually, the fuel supply device according to the fourth embodiment has the strength of the welded portion on both the surface of the main body portion 21 in surface contact with the cover portion 22 and the surface of the cover portion in surface contact with the main body portion. The surfaces 25wm and 26wm that come into surface contact with each other are expanded so that the shape rises. Wedge shape is continuously formed on both sides of the same.

以下、本願の技術的な特徴点を列挙する。
特徴点1:本願は、軸方向に直結するモータ部とポンプ部、および前記モータ部を通る燃料流路とを有し、前記軸方向の一方側に燃料の吸込み口が、他方側に加圧した燃料の吐出口が設けられた燃料ポンプと、
円筒状を成し、前記燃料ポンプから吐出された燃料を濾材に対して径方向に透過させて浄化する円筒状の高圧フィルタと、燃料タンクの底面側の開口部に固定される蓋部材と、
前記蓋部材から立ち上がるように前記蓋部材に保持され、前記吐出口が上方で開口するように、前記燃料ポンプの軸を立てて収容する第一収容空間(ポンプ用空間)と、
前記第一収容空間(ポンプ用空間)と水平方向に隣接し、燃料の流入口が上方で開口するように前記高圧フィルタの軸を立てて収容する第二収容空間(高圧フィルタ用空間)と、
前記第一収容空間(ポンプ用空間)と前記第二収容空間(高圧フィルタ用空間)の上方で水平方向に延び、前記吐出口と前記流入口とを連通する連通流路を形成する樹脂製のケース体と、
を備え、
前記連通流路は、流れ方向に垂直な断面が矩形を成すとともに、底面側で前記高圧フィルタを挿入するための挿入口が開口し、前記ケース体は、前記連通流路の天面側と底面側とで分割して構成され、前記天面側と前記底面側の互いの外周部端面が突き合わされ、溶着により接合される成形体において、
前記連通流路の一部を形成している半円筒部の内壁を、前記連通流路の内側に延伸させた形状を有し、かつ延伸させた形状は、流路を塞がず、かつ整流となるよう鈍角な形状で形成している燃料供給装置である。
特徴点2:本願は、特徴点1において、前記延伸させた形状は、前記天面側と前記底面側の前記接合面に互いに対となるよう設けられており、前記外周部の突き合わせ端の溶着の際に、前記延伸させた部位同士も互いに接合される燃料供給装置である。
特徴点3:本願は、軸方向に直結するモータ部とポンプ部、および前記モータ部を通る燃料流路とを有し、前記軸方向の一方側に燃料の吸込み口が、他方側に加圧した燃料の吐出口が設けられた燃料ポンプと、
円筒状を成し、前記燃料ポンプから吐出された燃料を濾材に対して径方向に透過させて浄化する円筒状の高圧フィルタと、燃料タンクの底面側の開口部に固定される蓋部材と、
前記蓋部材から立ち上がるように前記蓋部材に保持され、前記吐出口が上方で開口するように、前記燃料ポンプの軸を立てて収容する第一収容空間(ポンプ用空間)と、
前記第一収容空間(ポンプ用空間)と水平方向に隣接し、燃料の流入口が上方で開口するように前記高圧フィルタの軸を立てて収容する第二収容空間(高圧フィルタ用空間)と、
前記第一収容空間(ポンプ用空間)と前記第二収容空間(高圧フィルタ用空間)の上方で水平方向に延び、前記吐出口と前記流入口とを連通する連通流路を形成する樹脂製のケース体と、
を備え、
前記連通流路は、流れ方向に垂直な断面が矩形を成すとともに、底面側で前記高圧フィルタを挿入するための挿入口が開口し、前記ケース体は、前記連通流路の天面側と底面側とで分割して構成され、前記天面側と前記底面側の互いの外周部端面が突き合わされ、溶着により接合される成形体において、
前記外周部端面には補強形状が設けられていると共に、前記補強形状は、前記ケース体の長手方向頂点に接する最小円弧に対し、この最小円弧の枠を超えない範囲内で、任意の位置に1ヶ所、もしくは複数個所設けられている燃料供給装置である。
特徴点4:本願は、特徴点1において、前記補強形状は、前記天面側と前記底面側の前記接合面に互いに対となるよう設けられており、前記外周部の突き合わせ端の溶着の際に、前記延伸させた部位同士も互いに接合される燃料供給装置である。
特徴点5:本願は、軸方向に直結するモータ部とポンプ部、および前記モータ部を通る燃料流路とを有し、前記軸方向の一方側に燃料の吸込み口が、他方側に加圧した燃料の吐出口が設けられた燃料ポンプと、
円筒状を成し、前記燃料ポンプから吐出された燃料を濾材に対して径方向に透過させて浄化する円筒状の高圧フィルタと、燃料タンクの底面側の開口部に固定される蓋部材と、
前記蓋部材から立ち上がるように前記蓋部材に保持され、前記吐出口が上方で開口するように、前記燃料ポンプの軸を立てて収容する第一収容空間(ポンプ用空間)と、
前記第一収容空間(ポンプ用空間)と水平方向に隣接し、燃料の流入口が上方で開口するように前記高圧フィルタの軸を立てて収容する第二収容空間(高圧フィルタ用空間)と、
前記第一収容空間(ポンプ用空間)と前記第二収容空間(高圧フィルタ用空間)の上方で水平方向に延び、前記吐出口と前記流入口とを連通する連通流路を形成する樹脂製のケース体と、
を備え、
前記連通流路は、流れ方向に垂直な断面が矩形を成すとともに、底面側で前記高圧フィルタを挿入するための挿入口が開口し、前記ケース体は、前記連通流路の天面側と底面側とで分割して構成され、前記天面側と前記底面側の互いの外周部端面が突き合わされ、溶着により接合される成形体において、
前記天面側と前記底面側の接合面全周にわたって互いに平行を成し、かつ隙間が無いよう傾斜面が設けられている燃料供給装置である。
特徴点6:本願は、特徴点5において、前記傾斜面は波状に複数設けられており、前記天面側と前記底面側の接合面全周にわたって互いに平行を成し、かつ隙間が無いよう設けられている燃料供給装置である。
The technical features of the present application will be listed below.
Characteristic point 1: The present application has a motor unit directly connected in the axial direction, a pump unit, and a fuel flow path that passes through the motor unit, and a fuel suction port is provided on one side in the axial direction and a pressure is applied on the other side. A fuel pump provided with a discharge port for the fuel,
A cylindrical high-pressure filter that has a cylindrical shape and that allows the fuel discharged from the fuel pump to permeate the filter medium in the radial direction to purify it; and a lid member fixed to the opening on the bottom side of the fuel tank,
A first accommodating space (pump space) that is held by the lid member so as to stand up from the lid member, and vertically accommodates the shaft of the fuel pump so that the discharge port opens upward;
A second accommodating space (high-pressure filter space) which is horizontally adjacent to the first accommodating space (pump space) and vertically accommodates the high-pressure filter so that the fuel inlet opens upward;
It is made of resin and extends in the horizontal direction above the first accommodation space (pump space) and the second accommodation space (high-pressure filter space) and forms a communication channel that connects the discharge port and the inflow port. Case body,
Equipped with
The communication channel has a rectangular cross section perpendicular to the flow direction, and an insertion port for inserting the high-pressure filter is opened on the bottom surface side, and the case body is a top surface side and a bottom surface of the communication channel. In the molded body, which is configured to be divided by the side, the outer peripheral end surfaces of the top surface side and the bottom surface side are abutted with each other, and joined by welding,
The inner wall of the semi-cylindrical portion forming a part of the communication channel has a shape extended to the inside of the communication channel, and the extended shape does not close the channel and rectifies the flow. The fuel supply device is formed to have an obtuse angle.
Characteristic point 2: In the present invention, in the characteristic point 1, the stretched shape is provided so as to be paired with each other on the joining surface on the top surface side and the bottom surface side, and welding of the abutting ends of the outer peripheral portion is performed. At this time, the stretched portions are also joined to each other.
Characteristic point 3: The present application has a motor portion and a pump portion that are directly connected in the axial direction, and a fuel flow path that passes through the motor portion. A fuel inlet is provided on one side in the axial direction and a pressure is applied on the other side. A fuel pump provided with a discharge port for the fuel,
A cylindrical high-pressure filter that has a cylindrical shape and that allows the fuel discharged from the fuel pump to permeate the filter medium in the radial direction to purify it; and a lid member fixed to the opening on the bottom side of the fuel tank,
A first accommodating space (pump space) that is held by the lid member so as to stand up from the lid member, and vertically accommodates the shaft of the fuel pump so that the discharge port opens upward;
A second accommodating space (high-pressure filter space) which is horizontally adjacent to the first accommodating space (pump space) and vertically accommodates the high-pressure filter so that the fuel inlet opens upward;
It is made of resin and extends in the horizontal direction above the first accommodation space (pump space) and the second accommodation space (high-pressure filter space) and forms a communication channel that connects the discharge port and the inflow port. Case body,
Equipped with
The communication channel has a rectangular cross section perpendicular to the flow direction, and an insertion port for inserting the high-pressure filter is opened on the bottom surface side, and the case body is a top surface side and a bottom surface of the communication channel. In the molded body, which is configured to be divided by the side, the outer peripheral end surfaces of the top surface side and the bottom surface side are abutted with each other, and joined by welding,
The outer peripheral end surface is provided with a reinforcing shape, and the reinforcing shape is at an arbitrary position within a range not exceeding the frame of the minimum arc with respect to the minimum arc that contacts the apex in the longitudinal direction of the case body. The fuel supply device is provided at one location or a plurality of locations.
Characteristic point 4: In the present invention, in the characteristic point 1, the reinforcing shapes are provided so as to be paired with each other on the joining surfaces on the top surface side and the bottom surface side, and at the time of welding the abutting ends of the outer peripheral portion. In addition, the stretched portions are also joined to each other in the fuel supply device.
Characteristic point 5: The present application has a motor portion and a pump portion that are directly connected to each other in the axial direction, and a fuel flow path that passes through the motor portion. A fuel pump provided with a discharge port for the fuel,
A cylindrical high-pressure filter that has a cylindrical shape and that allows the fuel discharged from the fuel pump to permeate the filter medium in the radial direction to purify it; and a lid member fixed to the opening on the bottom side of the fuel tank,
A first accommodating space (pump space) that is held by the lid member so as to stand up from the lid member, and vertically accommodates the shaft of the fuel pump so that the discharge port opens upward;
A second accommodating space (high-pressure filter space) which is horizontally adjacent to the first accommodating space (pump space) and vertically accommodates the high-pressure filter so that the fuel inlet opens upward;
It is made of resin and extends in the horizontal direction above the first accommodation space (pump space) and the second accommodation space (high-pressure filter space) and forms a communication channel that connects the discharge port and the inflow port. Case body,
Equipped with
The communication channel has a rectangular cross section perpendicular to the flow direction, and an insertion port for inserting the high-pressure filter is opened on the bottom surface side, and the case body is a top surface side and a bottom surface of the communication channel. In the molded body, which is configured to be divided by the side, the outer peripheral end surfaces of the top surface side and the bottom surface side are abutted with each other, and joined by welding,
In the fuel supply device, inclined surfaces are provided so as to be parallel to each other over the entire circumference of the joint surface on the top surface side and the bottom surface side and have no gap.
Characteristic point 6: In the characteristic point 5, in the present invention, the plurality of inclined surfaces are provided in a wavy shape, and are provided so as to be parallel to each other over the entire circumference of the joint surface on the top surface side and the bottom surface side and have no gaps. Fuel supply device.

なお、各図中、同一符合は同一または相当部分を示す。
なお、本願は、様々な例示的な実施の形態及び実施例が記載されているが、1つ、または複数の実施の形態に記載された様々な特徴、態様、及び機能は特定の実施の形態の適用に限られるのではなく、単独で、または様々な組み合わせで実施の形態に適用可能である。
従って、例示されていない無数の変形例が、本願に開示される技術の範囲内において想定される。例えば、少なくとも1つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも1つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。
In the drawings, the same reference numerals indicate the same or corresponding parts.
It should be noted that although the present application describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more of the embodiments are specific embodiments. The present invention is not limited to the application of the above, but can be applied to the embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and at least one component is extracted and combined with the components of other embodiments.

1 燃料供給装置、2 ケース体、2c 最小円弧、2h 開口、2j5 取付部、2jf 取付孔、2jp 取付孔、2jr 取付孔、3 蓋部材、3e 吐出配管、3f フランジ部、3s 支持部、4 サクションフィルタ、5 燃料ポンプ、5i 吸込み口、5s シール材、5x 吐出口、6 高圧フィルタ、6cd 突起部、6cu 突起部、6f フィルタリング部材、6fj 突き合わせ端、6i 吸入口、6s シール材、6x 吐出口、7 背圧弁、7s シール材、8 燃料流路、8e 吐出流路、8fb 底面、8ft 天面、8g 隙間、8r リターン流路、8t 連通流路、10 筐体、21 本体部、21e 吐出配管、21fm 突き合わせ端、21fp 突き合わせ端、21h 挿入口、21p 外周部、21sf 高圧フィルタ用空間、21sp ポンプ用空間、21wf 隔壁、21wm 補強形状部、21wp 隔壁、21wt 隔壁、22 カバー部、22fj 突き合わせ端、22fm 突き合わせ端、22fp 突き合わせ端、22j 円環状部、22p 外周部、22s 側面、22wm 補強形状部、23fm 突き合わせ端、23wm 補強形状部、24fm 突き合わせ端、24wm 補強形状部、25fp 突き合わせ端、25wm 突き合わせ面、26fp 突き合わせ端、26wm 突き合わせ面、27fp 突き合わせ端、27wm 突き合わせ面、28fp 突き合わせ端、28wm 突き合わせ面、910 エンジン、920 燃料タンク、990 燃料、J2 継目   1 fuel supply device, 2 case body, 2c minimum arc, 2h opening, 2j5 mounting portion, 2jf mounting hole, 2jp mounting hole, 2jr mounting hole, 3 lid member, 3e discharge pipe, 3f flange portion, 3s supporting portion, 4 suction Filter, 5 Fuel pump, 5i Suction port, 5s Seal material, 5x Discharge port, 6 High-pressure filter, 6cd protrusion, 6cu protrusion, 6f Filtering member, 6fj Butt end, 6i suction port, 6s Seal material, 6x discharge port, 7 back pressure valve, 7s sealing material, 8 fuel flow path, 8e discharge flow path, 8fb bottom surface, 8ft top surface, 8g gap, 8r return flow path, 8t communication flow path, 10 housing, 21 main body section, 21e discharge pipe, 21fm butt end, 21fp butt end, 21h insertion opening, 21p outer peripheral part, 21sf for high pressure filter , 21sp pump space, 21wf partition wall, 21wm reinforced shape part, 21wp partition wall, 21wt partition wall, 22 cover part, 22fj butt end, 22fm butt end, 22fp butt end, 22j annular part, 22p outer peripheral part, 22s side face, 22wm Reinforced shape part, 23fm butt end, 23wm reinforced shape part, 24fm butt end, 24wm reinforced shape part, 25fp butt end, 25wm butt face, 26fp butt end, 26wm butt face, 27fp butt end, 27wm butt face, 28fp butt end, 28wm butt face, 910 engine, 920 fuel tank, 990 fuel, J2 joint

本願に係る燃料供給装置は、軸方向の一方の側に燃料の吸込み口が、他方の側に加圧した前記燃料の吐出口がそれぞれ設けられた燃料ポンプと、
前記燃料ポンプから吐出された燃料を吸入口から吸入して浄化する円筒状の高圧フィルタと、
前記吐出口と前記吸入口とを連通する連通流路を形成するケース体と、
を備え、
前記連通流路は前記吐出口に対応する部分と前記吸入口に対応する部分との間の中間部分が直線状であり、
前記ケース体は、前記連通流路の天面側のカバー部と前記連通流路の底面側の本体部とに分割して構成され、
前記燃料ポンプおよび前記高圧フィルタは、前記本体部に、所定間隔を隔てて並列に内蔵され、
前記カバー部は有底の長小判形であり且つ天面部に補強構造部を有する構造であり、
前記カバー部の外周部の前記本体部の外周部との突合せ端と、前記本体部の前記外周部の前記カバー部の前記外周部との突合せ端とが面接触するように突き合わされて、この突き合わされた部分で、溶着される燃料供給装置であって
前記連通流路の前記直線状の部分は、前記カバー部の天面部と前記カバー部の前記外周部と前記本体部の底面部と前記本体部の前記外周部とで形成され、
前記本体部の前記カバー部と面接触する面および前記カバー部の前記本体部と面接触する面の双方に、前記直線状の部分より前記吸入口の側の同じ位置において前記溶着の部分の強度が上がり且つ前記連通流路を流れる燃料の流れが整流の状態になるように、前記面接触する面が拡大した形状が施されている
ものである。
The fuel supply device according to the present application is a fuel pump in which a fuel inlet is provided on one side in the axial direction and a pressurized fuel outlet is provided on the other side,
A cylindrical high-pressure filter that purifies the fuel discharged from the fuel pump by suction from the suction port,
A case body that forms a communication channel that connects the discharge port and the suction port;
Equipped with
The communication flow path has a linear intermediate portion between a portion corresponding to the discharge port and a portion corresponding to the suction port,
The case body is configured to be divided into a cover portion on the top surface side of the communication channel and a main body portion on the bottom surface side of the communication channel ,
The fuel pump and the high-pressure filter are built in the main body in parallel at a predetermined interval,
The cover portion has a bottomed oval shape and has a structure having a reinforcing structure portion on the top surface portion,
And butt end of the outer peripheral portion of the main body portion of the outer peripheral portion of the cover portion, and the butt end of the outer peripheral portion of the cover portion of the outer peripheral portion of the main body portion is abutted to surface contact, this A fuel supply device that is welded at butted portions,
The linear portion of the communication channel is formed by the top surface portion of the cover portion, the outer peripheral portion of the cover portion, the bottom surface portion of the main body portion, and the outer peripheral portion of the main body portion,
Strength of the welded portion at the same position on the suction port side with respect to the linear portion on both the surface of the main body portion in surface contact with the cover portion and the surface of the cover portion in surface contact with the main body portion. There are those in which the flow of the fuel flowing over rising and the communication flow path is such that the state of the commutation, the shape of the surface which contacts the surface has expanded is applied.

本願の燃料供給装置によれば、軸方向の一方の側に燃料の吸込み口が、他方の側に加圧した前記燃料の吐出口がそれぞれ設けられた燃料ポンプと、前記燃料ポンプから吐出された燃料を吸入口から吸入して浄化する円筒状の高圧フィルタと、前記吐出口と前記吸入口とを連通する連通流路を形成するケース体と、を備え、前記連通流路は前記吐出口に対応する部分と前記吸入口に対応する部分との間の中間部分が直線状であり、前記ケース体は、前記連通流路の天面側のカバー部と前記連通流路の底面側の本体部とに分割して構成され、 前記燃料ポンプおよび前記高圧フィルタは、前記本体部に、所定間隔を隔てて並列に内蔵され、前記カバー部は有底の長小判形であり且つ天面部に補強構造部を有する構造であり、 前記カバー部の外周部の前記本体部の外周部との突合せ端と、前記本体部の前記外周部の前記カバー部の前記外周部との突合せ端とが面接触するように突き合わされて、この突き合わされた部分で、溶着される燃料供給装置であって、前記連通流路の前記直線状の部分は、前記カバー部の天面部と前記カバー部の前記外周部と前記本体部の底面部と前記本体部の前記外周部とで形成され、前記本体部の前記カバー部と面接触する面および前記カバー部の前記本体部と面接触する面の双方に、前記直線状の部分より前記吸入口の側の同じ位置において前記溶着の部分の強度が上がり且つ前記連通流路を流れる燃料の流れが整流の状態になるように、前記面接触する面が拡大した形状が施されているので、燃料供給装置内の圧力変動による燃料供給装置のケース体の溶着部での疲労強度低下、および高燃圧化による負荷増大を考慮しても、燃料タンクの限られた搭載範囲の中で、大きく形状を変化させることなく、溶着部分の強度を向上させ、信頼性の高い燃料供給装置を得ることができる。




According to the fuel supply device of the present application, a fuel pump in which a fuel suction port is provided on one side in the axial direction and a pressurized fuel discharge port is provided on the other side, and the fuel is discharged from the fuel pump. A cylindrical high-pressure filter for sucking and purifying fuel from an intake port, and a case body for forming a communication flow path that connects the discharge port and the suction port are provided, and the communication flow path is connected to the discharge port. An intermediate portion between a corresponding portion and a portion corresponding to the suction port is linear, and the case body includes a cover portion on a top surface side of the communication passage and a main body portion on a bottom surface side of the communication passage. The fuel pump and the high-pressure filter are built in the main body portion in parallel at a predetermined interval, and the cover portion has an oval shape with a bottom and a reinforcing structure on the top surface portion. And a peripheral portion of the cover portion. The abutting end of the main body portion with the outer peripheral portion and the abutting end of the outer peripheral portion of the main body portion with the outer peripheral portion of the cover portion are butted so as to make surface contact, and the welding is performed at the butted portion. In the fuel supply device, the linear portion of the communication channel includes a top surface portion of the cover portion, the outer peripheral portion of the cover portion, a bottom surface portion of the main body portion, and the outer peripheral portion of the main body portion. And at the same position on the suction port side of the linear portion on both the surface of the main body portion that makes surface contact with the cover portion and the surface of the cover portion that makes surface contact with the main body portion. Since the surface contacting surface is enlarged so that the strength of the welded portion is increased and the flow of fuel flowing through the communication channel is in a rectified state, pressure fluctuations in the fuel supply device may occur. Welding the case body of the fuel supply system Even if the fatigue strength of the welded part is reduced and the load is increased due to higher fuel pressure, the strength of the welded part is improved and the reliability is improved without significantly changing the shape within the limited mounting range of the fuel tank. It is possible to obtain a high fuel supply device.




Claims (8)

軸方向の一方の側に燃料の吸込み口が、他方の側に加圧した前記燃料の吐出口がそれぞれ設けられた燃料ポンプと、
前記燃料ポンプから吐出された燃料を吸入口から吸入して浄化する円筒状の高圧フィルタと、
前記吐出口と前記吸入口とを連通する連通流路を形成するケース体と、
を備え、
前記燃料ポンプおよび前記高圧フィルタは、前記ケース体に、所定間隔を隔てて並列に内蔵され、
前記ケース体は、前記連通流路の天面側のカバー部と底面側の本体部とに分割して構成され、
前記カバー部の外周部の前記本体部との突合せ端と、前記本体部の外周部の前記カバー部との突合せ端とが面接触するように突き合わされて、この突き合わされた部分で、溶着される燃料供給装置において、
前記本体部の前記カバー部と面接触する面および前記カバー部の前記本体部と面接触する面の双方に、前記溶着の部分の強度が上がるように前記面接触する面が拡大した形状が施されている
ことを特徴とする燃料供給装置。
A fuel pump in which a fuel inlet is provided on one side in the axial direction and a pressurized fuel outlet is provided on the other side;
A cylindrical high-pressure filter that purifies the fuel discharged from the fuel pump by suction from the suction port,
A case body that forms a communication channel that connects the discharge port and the suction port;
Equipped with
The fuel pump and the high-pressure filter are built in the case body in parallel at predetermined intervals,
The case body is configured by being divided into a cover portion on the top surface side of the communication channel and a main body portion on the bottom surface side,
The abutting end of the outer peripheral portion of the cover portion with the main body portion and the abutting end of the outer peripheral portion of the main body portion with the cover portion are butted so as to make surface contact with each other, and welded at the butted portion. In the fuel supply device
Both the surface of the main body portion that makes surface contact with the cover portion and the surface of the cover portion that makes surface contact with the main body portion have a shape in which the surface contact surface is enlarged so as to increase the strength of the welded portion. Fuel supply device characterized by being provided.
前記形状が、前記本体部の前記カバー部と前記面接触する面および前記カバー部の前記本体部と面接触する面の双方から前記連通流路に突出した形状であることを特徴とする請求項1に記載の燃料供給装置。   The shape is a shape protruding into the communication channel from both a surface of the main body portion that makes surface contact with the cover portion and a surface of the cover portion that makes surface contact with the main body portion. 1. The fuel supply device according to 1. 前記形状が、前記連通流路と反対の側に突出した形状であることを特徴とする請求項1または請求項2に記載の燃料供給装置。   The fuel supply device according to claim 1 or 2, wherein the shape is a shape protruding toward a side opposite to the communication channel. 前記形状が、前記本体部の前記カバー部と前記面接触する面および前記カバー部の前記本体部と面接触する面の双方が内壁面側から外壁面側にまたは外壁面側から内壁面側に傾斜した形状であることを特徴とする請求項1から請求項3のいずれか一項に記載の燃料供給装置。   The shape is such that both a surface of the main body portion in surface contact with the cover portion and a surface of the cover portion in surface contact with the main body portion are from the inner wall surface side to the outer wall surface side or from the outer wall surface side to the inner wall surface side. The fuel supply device according to any one of claims 1 to 3, wherein the fuel supply device has an inclined shape. 前記形状が、前記本体部の前記カバー部と前記面接触する面および前記カバー部の前記本体部と面接触する面の双方にくさび形の形状が連続して波状に形成された形状であることを特徴とする請求項1から請求項4のいずれか一項に記載の燃料供給装置。   The shape is a shape in which a wedge-shaped shape is continuously formed in a wavy shape on both a surface of the main body portion in surface contact with the cover portion and a surface of the cover portion in surface contact with the main body portion. The fuel supply device according to any one of claims 1 to 4, characterized in that. 前記カバー部および前記本体部がいずれも樹脂製であることを特徴とする請求項1から請求項5のいずれか一項に記載の燃料供給装置。   The fuel supply device according to any one of claims 1 to 5, wherein both the cover portion and the body portion are made of resin. 請求項1から請求項6のいずれか一項に記載の前記燃料供給装置が、車両の燃料タンク内に搭載されることを特徴とする燃料供給装置。   A fuel supply device, wherein the fuel supply device according to any one of claims 1 to 6 is mounted in a fuel tank of a vehicle. 前記車両が自動二輪車であることを特徴とする請求項7に記載の燃料供給装置。   The fuel supply device according to claim 7, wherein the vehicle is a motorcycle.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999025975A1 (en) * 1997-11-19 1999-05-27 Mitsubishi Denki Kabushiki Kaisha Fuel feeder for vehicles
JP2007270821A (en) * 2006-03-08 2007-10-18 Aisan Ind Co Ltd Fuel pump module and set member
JP2011117323A (en) * 2009-12-01 2011-06-16 Mitsubishi Electric Corp Fuel supply equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999025975A1 (en) * 1997-11-19 1999-05-27 Mitsubishi Denki Kabushiki Kaisha Fuel feeder for vehicles
JP2007270821A (en) * 2006-03-08 2007-10-18 Aisan Ind Co Ltd Fuel pump module and set member
JP2011117323A (en) * 2009-12-01 2011-06-16 Mitsubishi Electric Corp Fuel supply equipment

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