EP0933523B1 - Structure et procede permettant d'assembler un bloc cylindres et un carter de vilebrequin - Google Patents
Structure et procede permettant d'assembler un bloc cylindres et un carter de vilebrequin Download PDFInfo
- Publication number
- EP0933523B1 EP0933523B1 EP98921802A EP98921802A EP0933523B1 EP 0933523 B1 EP0933523 B1 EP 0933523B1 EP 98921802 A EP98921802 A EP 98921802A EP 98921802 A EP98921802 A EP 98921802A EP 0933523 B1 EP0933523 B1 EP 0933523B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder block
- crankcase
- positioning
- rear end
- positioning member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0002—Cylinder arrangements
- F02F7/0007—Crankcases of engines with cylinders in line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0043—Arrangements of mechanical drive elements
- F02F7/0046—Shape of casings adapted to facilitate fitting or dismantling of engine parts
Definitions
- the present invention relates to a structure and method for assembling a cylinder block and crankcase of an engine.
- a general engine 21 has a crankcase 23 below a cylinder block 22, and rear end surfaces 24 and 25 of the crankcase and cylinder block are attached to a transmission casing 26.
- dowels 27 projecting from the cylinder block 22 are fitted in mating dowel holes 28 formed in the crankcase 23 for relative positioning between the cylinder block and crankcase. Then, the cylinder block and crankcase are firmly joined with each other by bolts.
- the crankcase 23 may have dowels and the cylinder block 22 may have the mating holes.
- reamer bolts or pins may be employed instead of the dowels for positioning (Japanese Utility Model Application, Laid-Open Publication No. 64-34448).
- a flywheel housing may be provided in the place of the transmission casing 26.
- a reference numeral 29 designates a cylinder head and 30 an oil pan.
- the rear end faces 24 and 25 of the cylinder block 22 and crankcase 23 form an interface to be joined with the transmission casing 26. Therefore, the rear end faces 24 and 25 should be coplanar after the cylinder block and crankcase are assembled. As illustrated in Figure 5 of the accompanying drawings, if a step or discrepancy ⁇ is created between the rear end surfaces 24 and 25, a gap may be left between the transmission casing 26 and the cylinder block and crankcase, and bolts and flanges extending through or near the transmission casing, cylinder block and crankcase may be damaged.
- the distance between the dowels 27 is X ⁇ ⁇ 1 and that between the dowel holes 28 is X ⁇ ⁇ 2.
- the distance from the rear dowel 27 to the rear end face 24 is Y ⁇ ⁇ 1 and that from the rear dowel hole 28 to the rear end face 25 is Y ⁇ ⁇ 2.
- An object of the present invention is to align the rear end surfaces of the cylinder block and crankcase by a relatively simple and easy structure and method, without using the cost-raising dowels or the like.
- a cylinder block-crankcase assembling structure includes a positioning member provided on at least one of rear end surfaces of cylinder block and crankcase, and the other rear end surface is caused to contact the positioning member when joining the cylinder block with the crankcase.
- the positioning member is a planar end plate.
- the positioning member has a portion projecting beyond a contact surface between the cylinder block and crankcase.
- the positioning member is attached by a bolt.
- a pair of positioning members are provided on the rear end surface on its right and left sides.
- the positioning member has a dust cover portion to close an opening of a transmission casing or flywheel housing.
- the rear end surfaces of the cylinder block and crankcase define surfaces to contact the transmission casing or flywheel housing.
- a second positioning projection is provided one of the contact surfaces of the cylinder block and crankcase, and a mating hole is provided on other contact surface.
- a cylinder block-crankcase assembling method includes providing a positioning member on at least one of rear end surfaces of cylinder block and crankcase, and causing the other rear end surface to abut against the positioning member when assembling the cylinder block and crankcase
- the cylinder block-crankcase assembling method includes providing a positioning projection on one of contact surfaces between the cylinder block and crankcase and a mating hole in the other contact surface to receive the projection, fitting the projection into the mating hole for rough positioning between the cylinder block and crankcase, moving the cylinder block and crankcase relative to each other until at least one of the rear end surfaces of the cylinder block and crankcase abuts the positioning member for final positioning between the cylinder block and crankcase, and then firmly uniting the cylinder block and crankcase by bolts.
- the positioning member is a planar end plate.
- the positioning member has a portion projecting beyond a contact surface between the cylinder block and crankcase.
- the positioning member is attached by a bolt.
- the positioning member is removed after the cylinder block and crankcase are assembled.
- a pair of positioning members are provided on the rear end surface on its right and left sides.
- the positioning member has a dust cover portion to close an opening of a transmission casing or flywheel housing.
- the rear end surfaces of the cylinder block and crankcase define surfaces to contact the transmission casing or flywheel housing.
- the cylinder block-crankcase assembling method includes providing end plates, as first positioning members, on the rear end surface of the crankcase on its right and left sides by bolts such that they project upward beyond a contact surface between the cylinder block and crankcase, providing a plurality of second positioning projections such as dowels on one of contact surfaces between the cylinder block and crankcase and a plurality of mating holes in the other contact surface to receive the projections, fitting the projections into the mating holes for rough positioning between the cylinder block and crankcase, moving the cylinder block and crankcase relative to each other until the rear end surface of the cylinder block abuts the end plates for final positioning between the cylinder block and crankcase, and then firmly uniting the cylinder block and crankcase by bolts.
- the above structure and method it is possible to align the rear end surfaces of the cylinder block and crankcase so that they become coplanar relative to each other. Therefore, unlike the conventional structure, it is unnecessary to perform a strict positioning by dowels or the like. Consequently, the dowels or the like may be dispensed with or the number of the dowels may be reduced so that cost reduction is realized.
- FIG. 1 is an illustration when viewed from the rear and Figure 2 is an illustration when viewed from the side.
- a crankcase 2 is assembled to a bottom of the cylinder block 1.
- the cylinder block and crankcase contact each other at their contact surfaces or interfaces 3 and 4, and firmly united together by bolts (not shown).
- a plurality of positioning projections such as dowels (not shown) are provided on one of the interfaces 3 and 4, and a plurality of mating holes such as dowel holes (not shown) to receive the projections are formed in the other interface.
- dowels and holes are utilized for merely rough positioning, and therefore strict accuracy is not required in dimensions and locations as compared with the conventional structure.
- the rear end surfaces 5 and 6 of the cylinder block and crankcase are surfaces which contact a transmission casing (not shown) or flywheel housing (not shown). These rear end surfaces 5 and 6 are precisely aligned with each other by a pair of end plates 7, which are positioning members, so that they are coplanar when the cylinder block and crankcase are assembled.
- the two end plates 7 are provided on the left and right sides. These end plates 7 are mounted on the rear end surface 6 of the crankcase 2 by bolts 8.
- Each of the end plates 7 has a portion 9 projecting upward beyond the contact surface 4 of the crankcase 2.
- Each of the end plates 7 has a small configuration so that it does not become an obstacle when a transmission casing and/or other parts are assembled. Locations, shapes and dimensions of the end plates 7 are determined under the same principle. It should be noted that the rear end surfaces 5 and 6 have a plurality of spacedly-arranged positioning and fixing members 10 such as bolt holes, dowels and dowel holes for positioning and fixing of a transmission casing and/or other parts.
- the cylinder block rear end surface 5 can contact the end plates 7, and fitting between the projections and holes does not affect the positioning by the end plates 7.
- the cylinder block and crankcase are tightened and firmly united by bolts (not shown). According to this assembling process, the cylinder block and crankcase are joined with each other with their rear end surfaces 5 and 6 being coplanar.
- the positioning between the rear end surfaces 5 and 6 is performed by the end plates 7 provided on one of the rear end surfaces 6, so that it is not necessary to carry out the positioning by the dowels or the like provided on the contact surfaces 3 and 4. Therefore, accuracy in dimensions and machining of the dowels and associated holes is substantially unnecessary. As a result, the dowels and mating holes may be dispensed with or the number of the dowels and associated holes may be reduced. In other words, by providing the end plates 7, the positioning of the rear end surfaces 5 and 6 is performed by a simple structure and method, without depending upon the dowels which entail high manufacturing cost.
- the positioning members are not limited to the planar end plates 7.
- they may be stay-like parts.
- the structure is also simple. Therefore, it is advantageous in terms of cost reduction.
- the positioning members may be attached onto the rear end surface 5 of the cylinder block 1, or they may be on both of the rear end surfaces 5 and 6.
- the number and locations of the positioning members are not limited to the illustrated ones, and the positioning members may be removed after the cylinder block 1 and crankcase 2 are joined by the bolts. If the positioning members do not interfere with a crankshaft and flywheel, the positioning members may not be removed after assembling since otherwise a step of removing the positioning members would be required.
- FIG 3 illustrates another embodiment of the present invention. Similar reference numerals are used to similar components in Figures 1 through 3.
- the right end plate 7A also includes a dust cover portion 11 to close a front opening of a transmission casing or flywheel housing. Conventionally, a separate dust cover is mounted on the transmission casing or the like to close the front opening thereof. In the second embodiment, however, the end plate 7A also serves as the dust cover so that a separate dust cover is not needed. This reduces the number of parts and in turn a manufacturing cost.
- the present invention is applicable to engine's cylinder block-crankcase assembling.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Claims (18)
- Structure d'assemblage de bloc-cylindres et de carter moteur, caractérisée en ce qu'un élément de positionnement (7, 7A) est prévu sur au moins une des surfaces d'extrémité arrière (6) du bloc-cylindres (1) et du carter moteur (2), et l'autre surface d'extrémité arrière (5) bute contre l'élément de positionnement (7, 7A) lorsque le bloc-cylindres (1) et le carter moteur (2) sont assemblés.
- Structure d'assemblage de bloc-cylindres et de carter moteur selon la revendication 1, caractérisée en ce que l'élément de positionnement (7) est une plaque plane d'extrémité.
- Structure d'assemblage de bloc-cylindres et de carter moteur selon la revendication 1 ou 2, caractérisée en ce que l'élément de positionnement (7, 7A) comporte une portion (9) dépassant au-delà d'une surface de Contact (4) entre le bloc-cylindres (1) et le carter moteur (2).
- Structure d'assemblage de bloc-cylindres et de carter moteur selon la revendication 1, 2 ou 3,
caractérisée en ce que l'élément de positionnement (7, 7A) est fixé à la surface d'extrémité arrière (6) par un boulon (8). - Structure d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'une paire d'éléments de positionnement (7, 7A) est prévue sur la surface d'extrémité arrière (6) sur ses côtés droit et gauche.
- Structure d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 1 à 5, caractérisée en ce que l'élément de positionnement (7, 7A) comporte une portion pare-poussières (11) pour fermer une ouverture d'une boîte d'engrenage ou d'un carter de volant.
- Structure d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 1 à 6, caractérisée en ce que les surfaces d'extrémité arrière (6, 7) du bloc-cylindres (1) et du carter moteur (2) sont des surfaces de contact avec une boîte d'engrenage ou un carter de volant.
- Structure d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 1 à 7, caractérisée en ce qu'une saillie est prévue sur une des surfaces de contact (3, 4), entre le bloc-cylindres (1) et le carter moteur (2), et un orifice est aménagé sur l'autre surface de contact pour recevoir la saillie à positionner entre le bloc-cylindres (1) et le carter moteur (2).
- Procédé d'assemblage de bloc-cylindres et de carter moteur, caractérisé en ce qu'un élément de positionnement (7, 7A) est prévu sur au moins une des surfaces d'extrémité arrière (6) du bloc-cylindres (1) et du carter moteur (2), et l'autre surface d'extrémité arrière (5) bute contre l'élément de positionnement (7, 7A) lorsque le bloc-cylindres (1) et le carter moteur (2) sont assemblés.
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon la revendication 9, caractérisé en ce qu'une saillie est prévue sur une des surfaces de contact (3, 4) entre le bloc-cylindres (1) et un carter moteur (2), et un orifice homologue est prévu sur l'autre surface de contact pour recevoir la saillie en vue d'un positionnement approximatif entre le bloc-cylindres (1) et le carter moteur (2), le bloc-cylindres (1) et le carter moteur (2) sont assemblés en logeant la saillie dans l'orifice homologue, le bloc-cylindres (1) et le carter moteur (2) sont déplacés l'un par rapport à l'autre jusqu'à ce qu'au moins une des surfaces d'extrémité arrière (5, 6) du bloc-cylindres (1) et du carter moteur (2) bute contre l'élément de positionnement (7, 7A) pour un positionnement final entre le bloc-cylindres (1) et le carter moteur (2), et le bloc-cylindres (1) et le carter moteur (2) sont solidement fixés par des boulons.
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon la revendication 9 ou 10, caractérisé en ce que l'élément de positionnement (7) est une plaque plane d'extrémité.
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon la revendication 9, 10 ou 11, caractérisé en ce que l'élément de positionnement (7, 7A) comporte une portion (9) dépassant au-delà d'une surface de contact (3, 4) entre le bloc-cylindres (1) et le carter moteur (2).
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 9 à 12, caractérisé en ce que l'élément de positionnement (7, 7A) est fixé à la surface d'extrémité arrière (6) par un boulon (8).
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 9 à 13, caractérisé en ce que l'élément de positionnement (7, 7A) est enlevé une fois que le bloc-cylindres (1) et le carter moteur (2) sont assemblés.
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 9 à 14, caractérisé en ce qu'une paire d'éléments de positionnement (7, 7A) est prévue sur la surface d'extrémité arrière (6) sur ses côtés droit et gauche.
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 9 à 15, caractérisé en ce que l'élément de positionnement (7A) comporte une portion pare-poussières (11) pour fermer une ouverture d'une boîte d'engrenage ou d'un carter de volant.
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon l'une quelconque des revendications 9 à 16, caractérisé en ce que les surfaces d'extrémité arrière (6, 7) du bloc-cylindres (1) et du carter moteur (2) sont des surfaces de contact avec une boîte d'engrenage ou un carter de volant.
- Procédé d'assemblage de bloc-cylindres et de carter moteur selon la revendication 9, caractérisé en ce que les plaques d'extrémité, en tant que premiers éléments de positionnement (7, 7A), sont fixées sur la surface d'extrémité arrière (6) du carter moteur (2) sur ses côtés droit et gauche par des boulons (8), de sorte que les plaques d'extrémité dépassent vers le haut à partir de sa surface de contact (4) jusqu'au bloc-cylindres (1) lorsqu'il est assemblé, une pluralité de secondes saillies de positionnement, telles que des goujons, est prévue sur une des surfaces de contact (3, 4) du bloc-cylindres (1) et du carter moteur (2), et une pluralité d'orifices homologues tels que des alésages est prévue sur l'autre surface de contact (3, 4) pour recevoir les secondes saillies de positionnement, le bloc-cylindres (1) et le carter moteur (2) sont positionnés approximativement l'un par rapport à l'autre en logeant les secondes saillies de positionnement dans les orifices homologues, le bloc-cylindres (1) et le carter moteur (2) sont déplacés l'un par rapport à l'autre jusqu'à ce que la surface d'extrémité arrière (5) du bloc-cylindres (1) bute contre les plaques d'extrémité pour un positionnement final entre le bloc-cylindres (1) et le carter moteur (2), et le bloc-cylindres (1) et le carter moteur (2) sont solidement fixés par des boulons.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13547197 | 1997-05-26 | ||
JP13547197A JPH10325358A (ja) | 1997-05-26 | 1997-05-26 | シリンダブロックとクランクケースの組付構造及び組付方法 |
PCT/JP1998/002292 WO1998054456A1 (fr) | 1997-05-26 | 1998-05-26 | Structure et procede permettant d'assembler un bloc cylindres et un carter de vilebrequin |
Publications (4)
Publication Number | Publication Date |
---|---|
EP0933523A1 EP0933523A1 (fr) | 1999-08-04 |
EP0933523A4 EP0933523A4 (fr) | 2004-03-31 |
EP0933523B1 true EP0933523B1 (fr) | 2007-04-11 |
EP0933523B8 EP0933523B8 (fr) | 2007-07-11 |
Family
ID=15152500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98921802A Expired - Lifetime EP0933523B8 (fr) | 1997-05-26 | 1998-05-26 | Structure et procede permettant d'assembler un bloc cylindres et un carter de vilebrequin |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0933523B8 (fr) |
JP (1) | JPH10325358A (fr) |
DE (1) | DE69837523T2 (fr) |
WO (1) | WO1998054456A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3994926B2 (ja) * | 2003-06-04 | 2007-10-24 | 日産自動車株式会社 | スタータ取付構造 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2002211A (en) * | 1934-10-05 | 1935-05-21 | Franklin L Torney | Motor crank case or the like |
US3817354A (en) * | 1972-06-01 | 1974-06-18 | Gear Co M W | Oil pan for tractors |
JPH071026B2 (ja) * | 1986-05-27 | 1995-01-11 | マツダ株式会社 | エンジンのブロツク構造 |
JPS634356U (fr) * | 1986-06-26 | 1988-01-12 | ||
JPH0626677B2 (ja) | 1987-07-31 | 1994-04-13 | 宇部興産株式会社 | 竪型ロ−ラミルの運転制御方法 |
JPH02139348U (fr) * | 1989-04-24 | 1990-11-21 |
-
1997
- 1997-05-26 JP JP13547197A patent/JPH10325358A/ja active Pending
-
1998
- 1998-05-26 WO PCT/JP1998/002292 patent/WO1998054456A1/fr active IP Right Grant
- 1998-05-26 EP EP98921802A patent/EP0933523B8/fr not_active Expired - Lifetime
- 1998-05-26 DE DE69837523T patent/DE69837523T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69837523T2 (de) | 2007-12-27 |
DE69837523D1 (de) | 2007-05-24 |
EP0933523A4 (fr) | 2004-03-31 |
EP0933523B8 (fr) | 2007-07-11 |
JPH10325358A (ja) | 1998-12-08 |
EP0933523A1 (fr) | 1999-08-04 |
WO1998054456A1 (fr) | 1998-12-03 |
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