CN103306845B - Right crankcase of engine - Google Patents
Right crankcase of engine Download PDFInfo
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- CN103306845B CN103306845B CN201310264378.8A CN201310264378A CN103306845B CN 103306845 B CN103306845 B CN 103306845B CN 201310264378 A CN201310264378 A CN 201310264378A CN 103306845 B CN103306845 B CN 103306845B
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Abstract
The invention discloses a right crankcase of an engine, wherein a crank shaft mounting hole (1) and a counterbalance shaft mounting hole (2) are formed in the box body, wherein an isolating cavity wrapping the right side of the counterbalance shaft mounting hole (2) partially is arranged on the inner side of the box body, and the isolating cavity starts from the top of the box body and extends downwards to the bottom of the box body along the right side of the box body; a partition board (4) is arranged inside the isolating cavity, the isolating cavity is divided into an oil-gas separating front cavity (5), an oil-gas separating back cavity (14) and an oil return cavity (6), a air inlet hole (8) communicated with the oil-gas separating front cavity (5) is formed in the box body, and the axial line of the air inlet hole (8) is parallel to the axial line of the crank shaft mounting hole (1); an air cylinder mounting surface (13) is arranged at the top of the box body, an eccentric distance e exists between the crank shaft mounting hole (1) and an air cylinder center line (9), wherein e is greater than 0. With the coordination of the left crank case correspondingly arranged, the problems of over high pressure inside the box body, bad oil-gas separating effect, and over pressure piston side during the work of the engine can be solved.
Description
Technical field
The present invention relates to a kind of right crankcase structure on motor, belong to mechanical structure technical field.
Background technique
Right crankcase is one of requisite component on motor, and right crankcase and left crankcase are installed together formation engine crankshaft box by mould assembling bolt.Right crankcase is called inner side near the side of left crankcase, be called outside near the side of right crankcase cover.Right crankcase is provided with crank mounting hole, trunnion shaft mounting hole and oil leab etc., and usually, trunnion shaft mounting hole site is in the upper right side of crank mounting hole.The subject matter existed is: often occur overpressure, unbalanced phenomenon in (1) casing, meanwhile, Oil-gas Separation is bad, and cause engine oil consumption large, exhaust emission is large; (2) there is not eccentric structure in the relative cylinder centerline of crank mounting hole, and cause side pressure of piston large, engine reliability is low; (3) after right crankcase and left crankcase mould assembling, rigidity is inadequate, causes engine noise large.
Summary of the invention
After the present invention is intended to solve right crankcase and left crankcase mould assembling, during engine operation, the problem that casing internal pressure is too high, Oil-gas Separation is bad and side pressure of piston is large.
For this reason, the technical solution adopted in the present invention is: a kind of engine right crankcase, casing is provided with crank mounting hole (1) and trunnion shaft mounting hole (2), described trunnion shaft mounting hole (2) is positioned at the right side of crank mounting hole (1), at crank mounting hole (1) built with bearing hole mold insert (3), key is: be provided with the separate cavities partly wrapping in trunnion shaft mounting hole (2) right side in the inner side of described casing, described separate cavities is from the top of casing, and the right side wall along casing extends downwardly into bottom half; Dividing plate (4) is provided with in described separate cavities, separate cavities is divided into Oil-gas Separation ante-chamber (5) Oil-gas Separation back cavity (14) and oil back chamber (6), described casing has the inlet hole (8) communicated with Oil-gas Separation ante-chamber (5), the axis of described inlet hole (8) and the axis being parallel of crank mounting hole (1); Described casing top is provided with cylinder attachment face (13), between described crank mounting hole (1) and cylinder centerline (9), there is eccentric distance e, and e > 0.
Right crankcase is set up Oil-gas Separation ante-chamber, Oil-gas Separation back cavity and oil back chamber and inlet hole.Left crankcase is provided with Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber and exhaust nozzle.Oil-gas Separation ante-chamber on Oil-gas Separation ante-chamber on left crankcase, Oil-gas Separation back cavity, oil back chamber and right crankcase, Oil-gas Separation back cavity, oil back chamber one_to_one corresponding.Left and right crankcases snaps together and forms Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber totally three independently cavitys; Equally, the dividing plate of crankcase is provided with breach, make each independently cavity be interconnected again, breach both can be arranged on left crankcase, also can be arranged on right crankcase.A complete respiratory system is constituted by inlet hole, Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber, exhaust nozzle, dividing plate between Oil-gas Separation ante-chamber and Oil-gas Separation back cavity plays the effect of Oil-gas Separation, gas after separation is discharged through exhaust nozzle, prevent the overpressure in crankcase body, machine oil after separation flows to oil back chamber through Oil-gas Separation back cavity, the bottom of oil back chamber is provided with return opening (return opening is arranged on left crankcase), flowed in the oil sump in crankcase body by return opening, recycling is carried out to machine oil.Meanwhile, crank is designed to eccentric structure, to reduce the side pressure of piston, mentions the reliability of engine operation.
Periphery except casing is provided with outer mould assembling bolt hole (10) outward, is also provided with interior mould assembling bolt hole (11) in casing, and described interior mould assembling bolt hole (11) is arranged on the rib that casing extends internally.By increasing interior mould assembling bolt around crankshaft cavity, thus improving the rigidity of motor, reaching the object reducing engine noise.
Described casing is provided with oil pump mounting hole (12), described oil pump mounting hole (12) is positioned at the below of trunnion shaft mounting hole (2), is provided with the oil inlet hole (7) communicated with oil pump mounting hole (12) at bottom half.Usually, oil pump is installed on the engine as independent parts, and be made up of the pump housing, oil pump cover, internal rotor, external rotor, oil pump shaft, oil pump needs to arrange the pump housing separately, and on the pump housing, offer oil inlet hole and oil outlet, and manufacture cost is high.The Function Integration Mechanism of oil pump on right crankcase, is used right crankcase and is installed as the pump housing of oil pump by this structure, makes oil pump develop into split-type structural from traditional monolithic construction.Internal rotor in split type oil pump, external rotor, oil pump shaft and traditional oil pump part are general, and do not need to arrange the pump housing separately, are ensureing, under the prerequisite that pump functional oil realizes, to reduce the manufacture cost of oil pump.
Be preferably, the eccentric distance e=3mm between described crank mounting hole (1) and cylinder centerline (9).
Further, described Oil-gas Separation ante-chamber (5) and Oil-gas Separation back cavity (14) are positioned at the top of trunnion shaft mounting hole (2), oil back chamber (6) is from the downside of Oil-gas Separation back cavity (14), right side wall along casing extends downwardly into bottom half, described trunnion shaft mounting hole (2) is positioned on same level line with the axis of crank mounting hole (1), and the dividing plate (4) between described Oil-gas Separation back cavity (14) and oil back chamber (6) is provided with breach (4a).Because separate cavities occupies the space of casing upper right quarter, trunnion shaft mounting hole moves down layout, and best and crank mounting hole is on same level line.
Beneficial effect of the present invention:
(1) on right crankcase, Oil-gas Separation ante-chamber, Oil-gas Separation back cavity and oil back chamber, inlet hole have been set up, correspondingly, left crankcase arranges Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber, exhaust nozzle, left and right crankcases snaps together the complete engine breathing system of formation one, avoid in casing the phenomenon occurring overpressure, meanwhile, energy separation oil and gas, reduce the oil consumption of motor, reduce air pollution emission;
(2) there is eccentric distance in crank mounting hole and cylinder centerline, crank bias installed, to reduce the side pressure of piston, improves engine reliability;
(3) by increasing interior mould assembling bolt around crankshaft cavity, combining with outer mould assembling bolt the rigidity improving motor, reaching the object reducing engine noise;
(4) use crankcase body to install as the pump housing of oil pump, make oil pump develop into split-type structural from traditional monolithic construction, reduce the manufacture cost of oil pump.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention (side from left crankcase).
Fig. 2 is the rear view of Fig. 1.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is that the B of Fig. 1 is to revolved view.
Fig. 5 is the C-C revolved sectional view of Fig. 2.
Fig. 6 is the structural representation of the left crankcase supporting with the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Engine right crankcase as shown in Figure 1 and Figure 2, casing is provided with crank mounting hole 1 and trunnion shaft mounting hole 2.Trunnion shaft mounting hole 2 is positioned at the right side of crank mounting hole 1.Shown in composition graphs 1, Fig. 3, at crank mounting hole 1 built with bearing hole mold insert 3.Figure 1 shows that the inner side of right crankcase, namely near the side of left crankcase; Figure 2 shows that the outside of right crankcase, namely near the side of right crankcase cover.
The separate cavities partly wrapped on the right side of trunnion shaft mounting hole 2 is provided with in the inner side of casing.Separate cavities is from the top of casing, and the right side wall along casing extends downwardly into bottom half.For vacating space arranges separate cavities, trunnion shaft mounting hole 2 relative conventional construction when arranging moves down.Be provided with a dividing plate 4 in separate cavities, separate cavities be divided into Oil-gas Separation ante-chamber 5, Oil-gas Separation back cavity 14, oil back chamber 6.Casing has the inlet hole 8 communicated with Oil-gas Separation ante-chamber 5, the axis of inlet hole 8 and the axis being parallel of crank mounting hole 1.Shown in composition graphs 1, Fig. 4, casing is also provided with cylinder attachment face 13, between crank mounting hole 1 and cylinder centerline 9, there is eccentric distance e, and e > 0.Preferably, the eccentric distance e=3mm between crank mounting hole 1 and cylinder centerline 9.
Oil-gas Separation ante-chamber 5 and Oil-gas Separation back cavity 14 are positioned at the top of trunnion shaft mounting hole 2, oil back chamber 6 is from the downside of Oil-gas Separation back cavity 14, right side wall along casing extends downwardly into bottom half, described trunnion shaft mounting hole 2 is positioned on same level line with the axis of crank mounting hole 1, and the dividing plate 4 between Oil-gas Separation back cavity 14 and oil back chamber 6 is provided with breach 4a.
Composition graphs 1, Fig. 2, except the periphery of casing is provided with outside several outer mould assembling bolts hole 10, be also provided with interior mould assembling bolt hole 11 in casing, and interior mould assembling bolt hole 11 is arranged on the rib that casing extends internally.The quantity of interior mould assembling bolt hole 11 is arranged as required, is preferably three, is looped around surrounding's distribution triangular in shape of crankshaft cavity.
Shown in composition graphs 2, Fig. 5, casing is provided with oil pump mounting hole 12, oil pump mounting hole 12 is positioned at the below of trunnion shaft mounting hole 2 and communicates with the oil leab 16 of casing is vertical, is provided with the oil inlet hole 7 communicated with oil pump mounting hole 12 at bottom half.
Figure 6 shows that the left crankcase that arrange corresponding to the present invention, left crankcase is provided with Oil-gas Separation ante-chamber 5 ', Oil-gas Separation back cavity 6a ', oil back chamber 6b ' and exhaust nozzle 15.Oil-gas Separation ante-chamber 5 ', Oil-gas Separation back cavity 6a ', oil back chamber 6b ' respectively with the Oil-gas Separation ante-chamber 5 on right crankcase, Oil-gas Separation back cavity 14, oil back chamber 6 one_to_one corresponding; Between Oil-gas Separation ante-chamber 5 ' and Oil-gas Separation back cavity 6a ', separate between Oil-gas Separation back cavity 6a ' and oil back chamber 6b ' respectively by dividing plate 4 ', every block dividing plate 4 ' is provided with breach, and two adjacent individual cavity are communicated with.
Left and right crankcases snaps together and forms Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber totally three independently cavitys.A complete respiratory system is constituted by inlet hole, Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber, exhaust nozzle, dividing plate between Oil-gas Separation ante-chamber and Oil-gas Separation back cavity plays the effect of Oil-gas Separation, gas after separation is discharged through exhaust nozzle, prevent the overpressure in crankcase body, machine oil after separation flows to oil back chamber through Oil-gas Separation back cavity, the bottom of oil back chamber is provided with return opening E, is flowed in the oil sump in crankcase body by return opening E.Inlet hole is communicated with crankcase, and exhaust nozzle is communicated with air, and oil back chamber is directly communicated with oil sump and return opening E is positioned at below oil sump pasta, can effectively prevent the oil gas in crankcase from reentering engine breathing system through return opening.
Claims (5)
1. an engine right crankcase, casing is provided with crank mounting hole (1) and trunnion shaft mounting hole (2), described trunnion shaft mounting hole (2) is positioned at the right side of crank mounting hole (1), at crank mounting hole (1) built with bearing hole mold insert (3), it is characterized in that: be provided with the separate cavities partly wrapping in trunnion shaft mounting hole (2) right side in the inner side of described casing, described separate cavities is from the top of casing, and the right side wall along casing extends downwardly into bottom half; Dividing plate (4) is provided with in described separate cavities, separate cavities is divided into Oil-gas Separation ante-chamber (5), Oil-gas Separation back cavity (14) and oil back chamber (6), dividing plate (4) between described Oil-gas Separation back cavity (14) and oil back chamber (6) is provided with breach (4a), described casing has the inlet hole (8) communicated with Oil-gas Separation ante-chamber (5), the axis of described inlet hole (8) and the axis being parallel of crank mounting hole (1); Described casing top is provided with cylinder attachment face (13), between described crank mounting hole (1) and cylinder centerline (9), there is eccentric distance e, and e > 0.
2. according to engine right crankcase according to claim 1, it is characterized in that: the periphery except casing is provided with outer mould assembling bolt hole (10) outward, in casing, be also provided with interior mould assembling bolt hole (11), described interior mould assembling bolt hole (11) is arranged on the rib that casing extends internally.
3. according to the engine right crankcase described in claim 1 or 2, it is characterized in that: described casing is provided with oil pump mounting hole (12), described oil pump mounting hole (12) is positioned at the below of trunnion shaft mounting hole (2), is provided with the oil inlet hole (7) communicated with oil pump mounting hole (12) at bottom half.
4. according to engine right crankcase according to claim 1, it is characterized in that: the eccentric distance e=3mm between described crank mounting hole (1) and cylinder centerline (9).
5. according to engine right crankcase according to claim 1, it is characterized in that: described Oil-gas Separation ante-chamber (5) and Oil-gas Separation back cavity (14) are positioned at the top of trunnion shaft mounting hole (2), oil back chamber (6) is from the downside of Oil-gas Separation back cavity (14), right side wall along casing extends downwardly into bottom half, described trunnion shaft mounting hole (2) is positioned on same level line with the axis of crank mounting hole (1), dividing plate (4) between described Oil-gas Separation back cavity (14) and oil back chamber (6) is provided with breach (4a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264378.8A CN103306845B (en) | 2013-06-28 | 2013-06-28 | Right crankcase of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264378.8A CN103306845B (en) | 2013-06-28 | 2013-06-28 | Right crankcase of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103306845A CN103306845A (en) | 2013-09-18 |
| CN103306845B true CN103306845B (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310264378.8A Active CN103306845B (en) | 2013-06-28 | 2013-06-28 | Right crankcase of engine |
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| CN (1) | CN103306845B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA202092391A1 (en) * | 2020-07-13 | 2022-01-31 | Пауэрхаус Энджин Солюшнз Свитселанд АйПи Холдинг ГмбХ | INTERNAL COMBUSTION ENGINE SYSTEM |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4229867B2 (en) * | 2004-03-31 | 2009-02-25 | 本田技研工業株式会社 | Power unit including an internal combustion engine including a variable compression ratio mechanism |
| JP2007064011A (en) * | 2005-08-29 | 2007-03-15 | Honda Motor Co Ltd | Stroke variable engine |
| JP4512011B2 (en) * | 2005-08-30 | 2010-07-28 | 本田技研工業株式会社 | Internal combustion engine |
| JP2007291950A (en) * | 2006-04-25 | 2007-11-08 | Honda Motor Co Ltd | Crankcase |
| JP4850096B2 (en) * | 2007-03-13 | 2012-01-11 | ヤマハ発動機株式会社 | Internal combustion engine and vehicle equipped with the same |
| CN202125370U (en) * | 2011-06-30 | 2012-01-25 | 三阳工业股份有限公司 | Vehicle engine |
| CN102979643B (en) * | 2012-12-07 | 2015-11-25 | 力帆实业(集团)股份有限公司 | A kind of crankcase combination reducing machine oil loss |
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2013
- 2013-06-28 CN CN201310264378.8A patent/CN103306845B/en active Active
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| Publication number | Publication date |
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| CN103306845A (en) | 2013-09-18 |
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