JP2013540930A - Fuel, preferably a pump unit for supplying diesel fuel to an internal combustion engine, and associated assembly method - Google Patents

Fuel, preferably a pump unit for supplying diesel fuel to an internal combustion engine, and associated assembly method Download PDF

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JP2013540930A
JP2013540930A JP2013526410A JP2013526410A JP2013540930A JP 2013540930 A JP2013540930 A JP 2013540930A JP 2013526410 A JP2013526410 A JP 2013526410A JP 2013526410 A JP2013526410 A JP 2013526410A JP 2013540930 A JP2013540930 A JP 2013540930A
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piston
support plate
seat
pump unit
diameter
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JP5654682B2 (en
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リグリェッティ、ガエターノ
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48—Assembling; Disassembling; Replacing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0408—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

ポンプユニットのシリンダ（５）内へと燃料を引き込むために、ピストン（７）は、ばね（１０）によってシリンダ（５）に沿って移動させられ、ばね（１０）は、ポンプ本体（２）と支持板（１１）との間に配置され、支持板（１１）は、ピストン（７）上に装着され、かつ、支持板（１１）を通じてピストン（７）を挿入するための座部（１４）と、支持板（１１）にピストン（７）を嵌入するための座部（１５）と、ピストン（７）が挿入座部（１４）と嵌入座部（１５）との間を通れるようにするための連絡部（１６）と、を有し、連絡部（１６）には、自由端（１８）をそれぞれが有する弾性的に変形自在な２つのアーム部（１７）が側方に連接する。
【選択図】図３
In order to draw fuel into the cylinder (5) of the pump unit, the piston (7) is moved along the cylinder (5) by a spring (10), which is connected to the pump body (2). The support plate (11) is disposed between the support plate (11), the support plate (11) is mounted on the piston (7), and the seat (14) for inserting the piston (7) through the support plate (11). And a seat (15) for inserting the piston (7) into the support plate (11), and the piston (7) can pass between the insertion seat (14) and the insertion seat (15). And two elastically deformable arm portions (17) each having a free end (18) are connected laterally to the communication portion (16).
[Selection] Figure 3

Description

本発明は、燃料、好適にディーゼル燃料を内燃機関へと供給するポンプユニットに関する。
特に、本発明は、ポンプ本体と、内燃機関へと燃料を供給するよう設計されたピストンポンプと、ピストンポンプに燃料を供給するよう設計された歯車ポンプと、に関する。
ピストンポンプは、ポンプ本体内に形成された少なくとも１つのシリンダと、ピストンと、を備え、ポンプ本体とピストン上に装着された支持板との間に配置されたばねの推力が掛かった状態での、シリンダ内へと燃料を引き込むための吸引行程、及び、作動装置の推力が掛かった状態での、シリンダ内に入れられた燃料を圧縮するための圧縮行程が行われるように、ピストンはシリンダ内に摺動自在に嵌め込まれる。
支持板は、ピストンの縦軸に対して平行に支持板を貫いて形成された開口部であって、支持板を通してピストンを挿入するための座部と、ピストンを支持板に嵌入するための座部と、ピストンが挿入座部と嵌入座部との間を通れるようにするための連絡部と、を含む上記開口部を含む。 The present invention relates to a pump unit for supplying fuel, preferably diesel fuel, to an internal combustion engine.
In particular, the invention relates to a pump body, a piston pump designed to supply fuel to an internal combustion engine, and a gear pump designed to supply fuel to the piston pump.
The piston pump includes at least one cylinder formed in the pump main body and a piston, and a state in which a thrust of a spring disposed between the pump main body and a support plate mounted on the piston is applied. The piston is placed in the cylinder so that a suction stroke for drawing the fuel into the cylinder and a compression stroke for compressing the fuel put in the cylinder in a state where the thrust of the actuator is applied. Fits slidably.
The support plate is an opening formed through the support plate in parallel with the longitudinal axis of the piston, and a seat portion for inserting the piston through the support plate, and a seat for fitting the piston into the support plate. And an opening including the connecting portion for allowing the piston to pass between the insertion seat portion and the insertion seat portion.

一般に、ピストンには、当該ピストンの外表面上に形成された環状溝が設けられ、ピストンは、連絡部の幅よりも僅かに大きい直径を有し、挿入座部は、略円形の形状を有し、及び、ピストンの直径よりも僅かに大きい直径を有し、嵌入座部は、略円形の形状を有し、及び、環状溝の直径よりも僅かに大きい直径を有する。   Generally, the piston is provided with an annular groove formed on the outer surface of the piston, the piston has a diameter slightly larger than the width of the connecting portion, and the insertion seat portion has a substantially circular shape. And the fitting seat has a substantially circular shape and a diameter slightly larger than the diameter of the annular groove.

ピストンがいったん挿入座部に案内されてしまうと、最初に、ピストンと支持板とは、環状溝が半径方向に連絡部と一線上に揃うまで、互いに対して軸方向に移動させられ、その後、連絡部を経由して環状溝を動かすことによりピストンが挿入座部から嵌入座部へと移されるように、ピストンと支持板とが互いに対して半径方向に移動させられる。   Once the piston is guided to the insertion seat, first the piston and the support plate are moved axially relative to each other until the annular groove is aligned with the connecting portion in the radial direction, then The piston and the support plate are moved in the radial direction with respect to each other so that the piston is moved from the insertion seat portion to the fitting seat portion by moving the annular groove via the connecting portion.

連絡部の幅は環状溝の直径よりも小さいため、ピストンが挿入座部から嵌入座部へと移動させられる場合には、環状溝が連絡部に当たる。従って、主として、ピストン上への支持板の取り付けにより、環状溝への損傷、ピストンからの金属粒子の分離、従って、ピストンの疲労強度の低下、及び、シリンダ内部でピストンが動かなくなること（ｓｅｉｚｉｎｇ）が引き起こされるという事実により、上記タイプの公知のポンプユニットには複数の欠点がある。   Since the width of the connecting portion is smaller than the diameter of the annular groove, the annular groove hits the connecting portion when the piston is moved from the insertion seat portion to the fitting seat portion. Therefore, mainly due to the mounting of the support plate on the piston, damage to the annular groove, separation of the metal particles from the piston, thus reducing the fatigue strength of the piston and seizing the piston inside the cylinder. Due to the fact that this is caused, known pump units of the above type have several drawbacks.

本発明の目的は、上記の欠点が無く簡素で安価に製造される燃料、好適にディーゼル燃料を内燃機関へと供給するためのポンプユニットを提供することである。   It is an object of the present invention to provide a pump unit for supplying fuel, preferably diesel fuel, to an internal combustion engine that is simple and inexpensive to manufacture without the above drawbacks.

本発明によれば、請求項１〜１２において請求される燃料、好適にディーゼル燃料を内燃機関へと供給するポンプユニットが提供される。   According to the invention, there is provided a pump unit for supplying the fuel claimed in claims 1 to 12, preferably diesel fuel, to an internal combustion engine.

本発明はさらに、燃料、好適にディーゼル燃料を内燃機関へと供給するポンプユニットの組立方法に関する。   The invention further relates to a method for assembling a pump unit for supplying fuel, preferably diesel fuel, to an internal combustion engine.

本発明によれば、請求項１３〜１７において請求される燃料、好適にディーゼル燃料を内燃機関へと供給するポンプユニットの組立方法が提供される。   According to the present invention, there is provided a method for assembling a pump unit for supplying the fuel claimed in claims 13 to 17, preferably diesel fuel, to an internal combustion engine.

ここで、非限定的な実施例を示す添付の図面を参照しながら本発明を記載することにする。   The present invention will now be described with reference to the accompanying drawings, which illustrate non-limiting examples.

明確さのために一部が削除された、本発明に係るポンプユニットの好適な実施形態の概略的な断面図を示す。Fig. 2 shows a schematic cross-sectional view of a preferred embodiment of a pump unit according to the present invention, part removed for clarity. 図１の第１の細部の側面図を示す。FIG. 2 shows a side view of the first detail of FIG. 図１の第２の細部の平面図を示す。FIG. 2 shows a plan view of the second detail of FIG.

図１を参照すると、符号１は全体において、燃料、特にディーゼル燃料を内燃機関（図示せず）へと供給するポンプユニットを表している。   Referring to FIG. 1, reference numeral 1 generally represents a pump unit that supplies fuel, in particular diesel fuel, to an internal combustion engine (not shown).

ポンプユニット１は、所与の縦軸３を有する中央孔（図示せず）が設けられたポンプ本体２と、内燃機関（図示せず）へと燃料を供給するよう設計されたピストンポンプ４と、ポンプ４に燃料を供給するよう設計された図示されない公知の歯車ポンプと、を備える。   The pump unit 1 comprises a pump body 2 provided with a central bore (not shown) having a given longitudinal axis 3, a piston pump 4 designed to supply fuel to an internal combustion engine (not shown), A known gear pump (not shown) designed to supply fuel to the pump 4.

ポンプ４は、ポンプ本体２内に形成され及び軸３の周りに均等に分散され及び軸３に対してほぼ垂直に交わる縦軸６をそれぞれが有する複数のシリンダ５（そのうちの１つが図１で示される）を備える。   The pump 4 is formed in the pump body 2 and is evenly distributed around the shaft 3 and has a plurality of cylinders 5 each of which has a longitudinal axis 6 (one of which is shown in FIG. Provided).

各シリンダ５内には、軸６と同軸上にシリンダ５内に装備された関連するピストン７が摺動自在に嵌め込まれ、各シリンダ５は直径Ｄ１を有し、各シリンダ５には、ピストン７自体の中間点にピストン７の外表面上に形成され直径Ｄ１よりも小さい直径Ｄ２を有する環状溝８（図２）が設けられる。   In each cylinder 5, an associated piston 7 mounted in the cylinder 5 coaxially with the shaft 6 is slidably fitted, and each cylinder 5 has a diameter D 1. An annular groove 8 (FIG. 2) formed on the outer surface of the piston 7 and having a diameter D2 smaller than the diameter D1 is provided at its midpoint.

ピストン７は、提案するケースでは駆動軸（図示せず）を備える作動装置９による関連するシリンダ５に沿った往復直線運動によって移動させられ、上記駆動軸は、軸３の同軸上にポンプ本体２を貫いて伸長し、及び、ポンプ本体２に関して軸３の周りを回転するように装備され、及び、スリーブ（図示せず）を通じて転がり軸受（図示せず）を介して回転自在に嵌め込まれた偏心部を有する。   The piston 7 is moved by a reciprocating linear movement along the associated cylinder 5 by means of an actuating device 9 with a drive shaft (not shown) in the proposed case, the drive shaft being coaxial with the shaft 3 on the pump body 2. An eccentric that extends through the shaft and is mounted to rotate about a shaft 3 with respect to the pump body 2 and is rotatably fitted through a rolling bearing (not shown) through a sleeve (not shown). Part.

スリーブ（図示せず）は、軸３に対して平行な縦軸を有し、及び、シリンダ５の数と等しい数の複数の平面が設けられた円柱面が外からスリーブに連結し、上記複数の平面はそれぞれ、関連するピストン７と平面自体との間に配置された各円板要素（図示せず）に対面している。   The sleeve (not shown) has a longitudinal axis parallel to the axis 3, and a cylindrical surface provided with a plurality of planes equal to the number of cylinders 5 is connected to the sleeve from the outside, and the plurality Each of the planes faces a respective disk element (not shown) arranged between the associated piston 7 and the plane itself.

作動装置９はさらに、各ピストン７のためにそれぞればね１０を含み、このばね１０は、関連する軸６と同軸上に装着され、及び、ポンプ本体２と、関連する軸６に対して直角にピストン７上に装備された略平坦な支持板１１と、の間に配置され、及び、関連する円板要素（図示せず）に接触させた状態でピストン７自体を移動させ及び正常に保持するように設計されている。   The actuating device 9 further includes a spring 10 for each piston 7, which is mounted coaxially with the associated shaft 6 and perpendicular to the pump body 2 and the associated shaft 6. The substantially flat support plate 11 mounted on the piston 7 is disposed between and moves and holds the piston 7 in a normal state in contact with an associated disk element (not shown). Designed to be

駆動軸（図示せず）の回転に従って、各ピストン７は、関連するシリンダ５内へと燃料を引き込むための行きの（ｏｕｔｗａｒｄ）吸引行程の間には関連するばね１０によって、及び、関連するシリンダ５内に入れられた燃料を圧縮するための戻りの（ｒｅｔｕｒｎ）圧縮行程の間には、駆動軸（図示せず）の偏心部によって、スリーブ（図示せず）によって、及び、関連する座金（図示せず）によって、移動させられる。   As the drive shaft (not shown) rotates, each piston 7 is moved by an associated spring 10 during the outbound suction stroke to draw fuel into the associated cylinder 5 and the associated cylinder. 5 during the return compression stroke to compress the fuel contained in 5 by the eccentric part of the drive shaft (not shown), by the sleeve (not shown) and the associated washer ( (Not shown).

図３に示されるように、上記板１１は開口部１２を有し、この開口部１２は、軸６に対して平行に上記板１１を貫いて形成され、及び、軸６とほぼ同一平面上にある対称面Ｓを有し、成形された側壁１３が開口部１２に連接し、開口部１２は、上記板１１を通してピストンを挿入するための座部１４と、上記板１１にピストンを嵌入するための座部１５と、座部１４と座部１５との間の通過を可能にする連絡部１６と、を含む。   As shown in FIG. 3, the plate 11 has an opening 12, which is formed through the plate 11 in parallel to the shaft 6 and is substantially flush with the shaft 6. The molded side wall 13 is connected to the opening 12, and the opening 12 fits the piston into the plate 11 and the seat 14 for inserting the piston through the plate 11. And a communication portion 16 that allows passage between the seat portion 14 and the seat portion 15.

座部１４は、略円形の形状を有し、及び、軸６とは異なる湾曲部の中心Ｃ１を有し、及び、ピストン７の直径Ｄ１よりも僅かに大きい直径Ｄ３を有し、座部１５は、略円形の形状を有し、及び、軸６に沿ってほぼ配置された湾曲部の中心Ｃ２を有し、及び、ピストン７の直径Ｄ１よりも僅かに小さく上記溝８の直径Ｄ２よりも僅かに大きい直径Ｄ４を有する。   The seat portion 14 has a substantially circular shape, has a center C1 of a curved portion different from the axis 6, and has a diameter D3 slightly larger than the diameter D1 of the piston 7, and the seat portion 15 Has a substantially circular shape, has a center C2 of the curved portion substantially disposed along the axis 6, and is slightly smaller than the diameter D1 of the piston 7 and larger than the diameter D2 of the groove 8. It has a slightly larger diameter D4.

さらに、中心Ｃ１とＣ２との間の距離が、２つの座部１４及び１５の湾曲部の半径の和よりも小さいことが指摘される。   Furthermore, it is pointed out that the distance between the centers C1 and C2 is smaller than the sum of the radii of the curved portions of the two seats 14 and 15.

連絡部１６には、上記壁１３から開口部１２内へと突出した弾性的に変形自在な２つのアーム部１７が側方に連接し、この２つのアーム部１７は、上記面Ｓとは反対の側に伸びており、２つのアーム部１７はそれぞれ、提案するケースでは軸６に対して平行に上記板１１上に形成された穴１９がそれぞれ設けられた自由端１８を有する。   The connecting portion 16 has two elastically deformable arm portions 17 projecting from the wall 13 into the opening portion 12, and the two arm portions 17 are opposite to the surface S. Each of the two arm portions 17 has a free end 18 provided with a hole 19 formed on the plate 11 parallel to the shaft 6 in the proposed case.

アーム部１７は、通常では、狭い初期構成（図３）において配置され、この狭い初期構成では、上記部１６は、平面Ｓに対して直角に測定された、上記溝８の直径Ｄ２よりも僅かに小さい幅Ｌ１を有し、各アーム部１７は、略V字型の形状を有し、座部１４の部分と座部１５の部分とを画定するために、他方のアーム部１７と協働する。   The arm part 17 is normally arranged in a narrow initial configuration (FIG. 3), in which the part 16 is slightly smaller than the diameter D2 of the groove 8 measured perpendicular to the plane S. Each arm portion 17 has a substantially V-shaped shape and cooperates with the other arm portion 17 to define a seat 14 portion and a seat 15 portion. To do.

開口部１２はさらに２つの凹部２０を含み、この２つの凹部２０は平面Ｓとは反対の側に形成され、２つの凹部２０には、上記壁１３と、関連するアーム部１７と、が連接している。   The opening 12 further includes two recesses 20, which are formed on the side opposite to the plane S, and the two recesses 20 are connected to the wall 13 and the associated arm portion 17. doing.

上記板１１をピストン７上に取り付けるために、
ピストン７が挿入座部１４に挿入され、
上記溝８が半径方向に連絡部１６と一線上に揃うように、上記板１１がピストン７に沿って軸方向に移動させられ、
連絡部１６を広がった最終構成（図示せず）とするために、アーム部１７が、例えば穴１９内に嵌め込まれた拡張ツール（ｓｐｌａｙｉｎｇ ｔｏｏｌ）を用いて、関連する凹部２０内で外へ広げられ（ｓｐｌａｙ）、上記広がった最終構成では、上記部１６は、平面Ｓに対して直角に測定された、幅Ｌ１よりも大きく上記溝８の直径と少なくとも等しい幅Ｌ２を有し、
上記部１６を経由して上記溝８が動かすために、ピストン７が、座部１４から嵌入座部１５へと半径方向に移動させられ、
アーム部１７は、ピストン７を座部１５内で半径方向に固定するために解放される。 In order to mount the plate 11 on the piston 7,
The piston 7 is inserted into the insertion seat 14,
The plate 11 is moved in the axial direction along the piston 7 so that the groove 8 is aligned with the connecting portion 16 in the radial direction,
In order to provide a final configuration (not shown) in which the communication part 16 is widened, the arm part 17 is spread out in the relevant recess 20 using, for example, a spreading tool fitted in the hole 19. In the expanded final configuration, the part 16 has a width L2 measured at right angles to the plane S and greater than the width L1 and at least equal to the diameter of the groove 8;
In order to move the groove 8 via the part 16, the piston 7 is moved in the radial direction from the seat part 14 to the fitting seat part 15,
The arm part 17 is released to fix the piston 7 in the radial direction within the seat part 15.

上記溝８は、提案するケースでは、上記板１１の厚さよりも大きい高さＨを有し、上記板１１は、最終的に、ピストン７と接触した状態で移動させられる。   In the proposed case, the groove 8 has a height H greater than the thickness of the plate 11, and the plate 11 is finally moved in contact with the piston 7.

アーム部１７の上記広がった最終構成によって、ピストン７が、連絡部１６に当たることなく座部１４から座部１５へと半径方向に移動することが可能となり、従って、上記溝８への損傷、ピストン７からの金属粒子の分離、ピストン７の疲労強度の低下、及び、シリンダ５内部でピストン７が動かなくなることが防止される。   The widened final configuration of the arm part 17 allows the piston 7 to move radially from the seat part 14 to the seat part 15 without hitting the connecting part 16, thus damaging the groove 8, the piston It is possible to prevent the metal particles from separating from 7, lowering the fatigue strength of the piston 7, and preventing the piston 7 from moving inside the cylinder 5.

Claims (17)

燃料、好適にディーゼル燃料を内燃機関へと供給するポンプユニットであって、前記ポンプユニットは、ポンプ本体（２）と、前記ポンプ本体（２）内に形成された少なくとも１つのシリンダ（５）と、前記シリンダ（５）内に摺動自在に嵌め込まれた少なくとも１つの第１の直径（Ｄ２）を有するピストン（７）と、前記ピストン（７）上に装着された支持板（１１）と、前記燃料を前記シリンダ（５）内に引き込むための吸入行程の間に前記ピストン（７）を移動させるための、前記ポンプ本体（２）と前記支持板（１１）との間に配置されたばね（１０）と、前記シリンダ（５）内に入れられた前記燃料を圧縮するための圧縮行程の間に前記ピストン（７）を移動させるための作動装置と、を備え、前記支持板（１１）は、前記ピストン（７）の縦軸（６）と平行に当該支持板（１１）を貫いて形成された開口部（１２）であって、前記支持板（１１）を通じて前記ピストン（７）を挿入するための座部（１４）と、前記ピストン（７）を前記支持板（１１）に嵌入するための座部（１５）と、前記ピストン（７）が前記挿入座部（１４）と前記嵌入座部（１５）との間を通れるようにするための連絡部（１６）と、を含む上記開口部（１２）を有し、前記連絡部（１６）は、その狭い初期構成において、前記第１の直径（Ｄ２）よりも僅かに小さい第１の幅（Ｌ１）を有し、前記連絡部（１６）には、自由端（１８）をそれぞれが有する弾性的に変形自在な２つのアーム部（１７）が側方に連接することを特徴とする、燃料、好適にディーゼル燃料を内燃機関へと供給するポンプユニット。   A pump unit for supplying fuel, preferably diesel fuel, to an internal combustion engine, the pump unit comprising a pump body (2) and at least one cylinder (5) formed in the pump body (2) A piston (7) having at least one first diameter (D2) slidably fitted in the cylinder (5), and a support plate (11) mounted on the piston (7); A spring (2) disposed between the pump body (2) and the support plate (11) for moving the piston (7) during a suction stroke for drawing the fuel into the cylinder (5). 10) and an actuating device for moving the piston (7) during a compression stroke for compressing the fuel contained in the cylinder (5), the support plate (11) The fixie An opening (12) formed through the support plate (11) in parallel with the longitudinal axis (6) of (7) for inserting the piston (7) through the support plate (11) The seat (14), the seat (15) for fitting the piston (7) into the support plate (11), and the piston (7) are inserted into the insertion seat (14) and the fitting seat ( 15) and the opening (12) including a communication portion (16) for allowing passage between the first diameter in the narrow initial configuration. The first width (L1) slightly smaller than (D2), and the connecting portion (16) has two elastically deformable arm portions (17) each having a free end (18). Fuel is supplied to the internal combustion engine, preferably diesel fuel, characterized in that Pump unit. 前記連絡部（１６）は、前記２つのアーム部（１７）を広げた後の、その広がった最終構成において、前記第１の直径（Ｄ２）に少なくとも等しい第２の幅（Ｌ２）を有する、請求項１に記載のポンプユニット。   The connecting portion (16) has a second width (L2) at least equal to the first diameter (D2) in its expanded final configuration after expanding the two arm portions (17). The pump unit according to claim 1. 前記アーム部（１７）はそれぞれ、前記広がった最終構成への当該アーム部（１７）の移動を可能にするよう設計された掴持手段（１９）を有する、請求項２に記載のポンプユニット。   3. A pump unit according to claim 2, wherein each of the arm portions (17) has gripping means (19) designed to allow movement of the arm portion (17) to the expanded final configuration. 前記アーム部（１７）はそれぞれ、前記広がった最終構成へと当該アーム部（１７）を移動させるための少なくとも１つの拡張ツールが嵌め込まれるように設計された掴持座部（１９）を有する、請求項２又は３に記載のポンプユニット。   The arm portions (17) each have a gripping seat portion (19) designed to fit at least one expansion tool for moving the arm portion (17) to the expanded final configuration. The pump unit according to claim 2 or 3. 前記挿入座部（１４）と前記嵌入座部（１５）とは略円形である、請求項１〜４のいずれか１項に記載のポンプユニット。   The pump unit according to any one of claims 1 to 4, wherein the insertion seat (14) and the fitting seat (15) are substantially circular. 前記挿入座部及び前記嵌入座部（１４、１５）の湾曲部の中心（Ｃ１、Ｃ２）は、前記挿入座部及び前記嵌入座部（１４、１５）の湾曲部の半径の和よりも小さく互いに距離を置いて配置される、請求項５に記載のポンプユニット。   The center (C1, C2) of the curved portion of the insertion seat portion and the insertion seat portion (14, 15) is smaller than the sum of the radii of the curved portions of the insertion seat portion and the insertion seat portion (14, 15). The pump unit according to claim 5, which is arranged at a distance from each other. 前記開口部（１２）は、前記アーム（１７）の弾性的変形の後に当該アーム部（１７）を収容するための、前記連絡部（１６）とは反対の側に配置された２つの凹部（２０）をさらに有する、請求項１〜６のいずれか１項に記載のポンプユニット。   The opening (12) has two recesses (on the side opposite to the connecting portion (16)) for accommodating the arm (17) after elastic deformation of the arm (17). The pump unit according to any one of claims 1 to 6, further comprising 20). 前記ピストン（７）は、第２の直径（Ｄ１）を有し、前記ピストン（７）の外表面上に形成され前記第１の直径（Ｄ２）を有する少なくとも１つの環状溝（８）を含む、請求項１〜７のいずれか１項に記載のポンプユニット。   The piston (7) has a second diameter (D1) and includes at least one annular groove (8) formed on the outer surface of the piston (7) and having the first diameter (D2). The pump unit according to any one of claims 1 to 7. 前記挿入座部（１４）は、前記第２の直径（Ｄ１）よりも僅かに大きい第３の直径（Ｄ３）を有し、前記嵌入座部（１５）は、前記第１の直径（Ｄ２）よりも僅かに大きく前記第２の直径（Ｄ１）よりも僅かに小さい第４の直径（Ｄ４）を有する、請求項８に記載のポンプユニット。   The insertion seat part (14) has a third diameter (D3) slightly larger than the second diameter (D1), and the insertion seat part (15) has the first diameter (D2). Pump unit according to claim 8, having a fourth diameter (D4) slightly larger than and slightly smaller than the second diameter (D1). 前記環状溝（８）は、前記軸（６）と平行に測定された、前記支持板（１１）の厚さよりも大きい高さ（Ｈ）を有する、請求項８又は９に記載のポンプユニット。   The pump unit according to claim 8 or 9, wherein the annular groove (8) has a height (H), measured parallel to the axis (6), greater than the thickness of the support plate (11). 前記２つのアーム部（１７）は、前記開口部（１２）の側壁（１３）から当該開口部（１２）内へと突き出ている、請求項１〜１０のいずれか１項に記載のポンプユニット。   The pump unit according to any one of claims 1 to 10, wherein the two arm portions (17) protrude from the side wall (13) of the opening (12) into the opening (12). . 少なくとも前記アーム部（１７）がその狭い初期構成により配置される場合に、各アーム部（１７）は、略Ｖ字型の形状を有し、前記挿入座部（１４）の部分と前記嵌入座部（１５）の部分とを画定するために、他方のアーム部（１７）と協働する、請求項１１に記載のポンプユニット。   When at least the arm portions (17) are arranged by the narrow initial configuration, each arm portion (17) has a substantially V-shaped shape, and the insertion seat portion (14) and the fitting seat 12. A pump unit according to claim 11, cooperating with the other arm part (17) to define a part of the part (15). 燃料、好適にディーゼル燃料を内燃機関へと供給するポンプユニットの組立方法であって、前記ポンプユニットは、ポンプ本体（２）と、前記ポンプ本体（２）内に形成された少なくとも１つのシリンダ（５）と、前記シリンダ（５）内に摺動自在に嵌め込まれ及び支持板（１１）を貫いて伸長し及び少なくとも１つの第１の直径（Ｄ２）を有するピストン（７）と、前記燃料を前記シリンダ（５）内に引き込むための吸入行程の間に前記ピストン（７）を移動させるための、前記ポンプ本体（２）と前記支持板（１１）との間に配置されたばね（１０）と、前記シリンダ（５）内に入れられた前記燃料を圧縮するための圧縮行程の間に前記ピストン（７）を移動させるための作動装置と、を備え、前記支持板（１１）は、前記ピストン（７）の縦軸（６）と平行に当該支持板（１１）を貫いて形成された開口部（１２）であって、前記支持板（１１）を通じて前記ピストン（７）を挿入するための座部（１４）と、前記ピストン（７）を前記支持板（１１）に嵌入するための座部（１５）と、前記ピストン（７）が前記挿入座部（１４）と前記嵌入座部（１５）との間を通れるようにするための連絡部（１６）と、を含む上記開口部（１２）を有し、前記連絡部（１６）には、自由端（１８）をそれぞれが有する弾性的に変形自在な２つのアーム部（１７）が側方に連接し、前記連絡部（１６）は、その狭い初期構成において、前記第１の直径（Ｄ２）よりも僅かに小さい第１の幅（Ｌ１）を有し、
前記方法は、
前記挿入座部（１４）へと前記ピストン（７）を案内する工程と、
広がった最終構成を前記連絡部（１６）に対して与えるために、前記アーム部（１７）を広げる工程であって、前記広がった最終構成では、前記連絡部（１６）が前記第１の直径（Ｄ２）に少なくとも等しい第２の幅（Ｌ２）を有する、前記広げる行程と、
前記連絡部（１６）を通って前記挿入座部（１４）から前記嵌入座部（１５）へと前記ピストン（７）を移動させるために、前記軸（６）に対して前記ピストン（７）と前記支持板（１１）とを互いに対して横方向に移動させる工程と、
を含む、燃料、好適にディーゼル燃料を内燃機関へと供給するポンプユニットの組立方法。 A method for assembling a pump unit for supplying fuel, preferably diesel fuel, to an internal combustion engine, the pump unit comprising a pump body (2) and at least one cylinder (2) formed in the pump body (2). 5), a piston (7) slidably fitted into the cylinder (5) and extending through the support plate (11) and having at least one first diameter (D2), and the fuel A spring (10) disposed between the pump body (2) and the support plate (11) for moving the piston (7) during a suction stroke for drawing into the cylinder (5); And an operating device for moving the piston (7) during a compression stroke for compressing the fuel put in the cylinder (5), and the support plate (11) (7 An opening (12) formed through the support plate (11) in parallel with the longitudinal axis (6) of the seat (for inserting the piston (7) through the support plate (11)). 14), a seat (15) for fitting the piston (7) into the support plate (11), and the piston (7) comprising the insertion seat (14) and the fitting seat (15). A connecting portion (16) for allowing passage between the opening portion (12), and the connecting portion (16) is elastically deformed, each having a free end (18). Two flexible arm portions (17) are connected laterally, and the connecting portion (16) has a first width (L1) slightly smaller than the first diameter (D2) in its narrow initial configuration. Have
The method
Guiding the piston (7) to the insertion seat (14);
Expanding the arm portion (17) to give the expanded final configuration to the communication portion (16), wherein the communication portion (16) is the first diameter in the expanded final configuration; Said expanding step having a second width (L2) at least equal to (D2);
In order to move the piston (7) from the insertion seat (14) to the fitting seat (15) through the connecting part (16), the piston (7) relative to the shaft (6) And moving the support plate (11) laterally relative to each other;
A method for assembling a pump unit that supplies fuel, preferably diesel fuel, to an internal combustion engine. 前記ピストン（７）は、前記連絡部（１６）に当たることなく、前記挿入座部（１４）から前記嵌入座部（１５）へと移動させられる、請求項１３に記載の方法。   14. The method according to claim 13, wherein the piston (7) is moved from the insertion seat (14) to the fitting seat (15) without hitting the connecting part (16). 前記ピストン（７）を前記嵌入座部（１５）内で半径方向に固定するために、前記アーム部（１７）を解放する工程をさらに含む、請求項１３又は１４に記載の方法。   The method according to claim 13 or 14, further comprising releasing the arm portion (17) to radially fix the piston (7) within the fitting seat (15). 前記ピストン（７）は、第２の直径（Ｄ１）を有し、前記ピストン（７）の外表面上に形成され前記第１の直径（Ｄ２）を有する少なくとも１つの環状溝（８）を含み、
前記方法は、
前記環状溝（８）が前記連絡部（１６）と一線上に揃うように、前記挿入座部（１４）を通じて、前記ピストン（７）と前記支持板（１１）とを互いに対して軸方向に移動させる工程と、
前記連絡部（１６）を経由して前記環状溝（８）を動かすために、前記ピストン（７）と前記支持板（１１）とを互いに対して半径方向に移動させる工程と、
を更に含む、請求項１３〜１５のいずれか１項に記載の方法。 The piston (7) has a second diameter (D1) and includes at least one annular groove (8) formed on an outer surface of the piston (7) and having the first diameter (D2). ,
The method
Through the insertion seat (14), the piston (7) and the support plate (11) are axially moved relative to each other so that the annular groove (8) is aligned with the connecting portion (16). A process of moving;
Moving the piston (7) and the support plate (11) in a radial direction relative to each other to move the annular groove (8) via the connecting portion (16);
The method according to any one of claims 13 to 15, further comprising: 前記環状溝（８）は、前記ピストン（７）の中間点に形成され、前記軸（６）と平行に測定された、前記支持板（１１）の厚さよりも大きい高さ（Ｈ）を有し、
前記方法は、
前記ピストン（７）に対して前記支持板（１１）を軸方向に固定するために、前記嵌入座部（１５）を通じて、前記ピストン（７）と前記支持板（１１）とを互いに対して軸方向に移動させる工程をさらに含む、請求項１６に記載の方法。
The annular groove (8) is formed at the midpoint of the piston (7) and has a height (H) greater than the thickness of the support plate (11), measured parallel to the axis (6). And
The method
In order to fix the support plate (11) in the axial direction with respect to the piston (7), the piston (7) and the support plate (11) are pivoted with respect to each other through the fitting seat (15). The method of claim 16, further comprising moving in a direction.
JP2013526410A 2010-09-01 2011-08-24 Fuel, preferably a pump unit for supplying diesel fuel to an internal combustion engine, and associated assembly method Expired - Fee Related JP5654682B2 (en)

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RU2013114165A (en) 2014-10-10
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EP2612017B1 (en) 2014-12-10
KR20130103718A (en) 2013-09-24

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