CN203335266U - Right crankcase of motorcycle engine - Google Patents
Right crankcase of motorcycle engine Download PDFInfo
- Publication number
- CN203335266U CN203335266U CN2013203777376U CN201320377737U CN203335266U CN 203335266 U CN203335266 U CN 203335266U CN 2013203777376 U CN2013203777376 U CN 2013203777376U CN 201320377737 U CN201320377737 U CN 201320377737U CN 203335266 U CN203335266 U CN 203335266U
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- oil
- mounting hole
- gas separation
- casing
- crankcase
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Abstract
The utility model discloses a right crankcase of a motorcycle engine. A crankshaft installation hole (1) and a balance shaft installation hole (2) are formed in the crankcase body, and a partition cavity partially covering the right side of the balance shaft installation hole (2) is formed in the inner side of the crankcase body, and extends to the bottom of the crankcase body along the right lateral wall of the crankcase body from the top of the crankcase body; partition plates (4) are arranged in the partition cavity, the partition cavity is cut into a front oil-gas separation cavity (5), a rear oil-gas separation cavity (14) and an oil return cavity (6) through the partition plates (6), a gas inlet (8) communicated with the front oil-gas separation cavity is formed in the crankcase body, and the axis of the gas inlet (8) is parallel to the axis of the crankshaft installation hole (1); an air cylinder installation surface (13) is arranged on the top of the crankcase body, and the eccentric distance e between the crankshaft installation hole (1) and an air cylinder center line (9) is larger than 0. The right crankcase of the motorcycle engine is used in cooperation with a corresponding left crankcase to solve the problems that when the engine works, pressure inside the crankcase body is too high, oil and gas separation effect is not good, and pressure on the piston side is large.
Description
Technical field
The utility model relates to a kind of for the right crankcase structure on motor, belongs to the mechanical structure technical field.
Background technique
Right crankcase is one of requisite component on motor, and right crankcase and left crankcase are installed together the formation engine crankshaft box by the mould assembling bolt.Right crankcase is called inboard near a side of left crankcase, and a side of close right crankcase cover is called the outside.Be provided with crank mounting hole, trunnion shaft mounting hole and oil leab etc. on right crankcase, usually, the 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, simultaneously, Oil-gas Separation is bad, causes the engine motor oil consumption large, and exhaust emission is large; (2) there is not eccentric structure in the relative cylinder centerline of crank mounting hole, causes side pressure of piston large, and engine reliability is low; (3) after right crankcase and left crankcase mould assembling, rigidity is inadequate, causes engine noise large.
The model utility content
After the utility model is intended to solve right crankcase and left crankcase mould assembling, during engine operation, the problem that the casing internal pressure is too high, Oil-gas Separation is bad and side pressure of piston is large.
For this reason, the technological scheme that the utility model adopts is: a kind of right crankcase of motorcycle engine, be provided with crank mounting hole (1) and trunnion shaft mounting hole (2) on casing, described trunnion shaft mounting hole (2) is positioned at the right side of crank mounting hole (1), bearing hole mold insert (3) is housed in crank mounting hole (1), key is: be provided with the separate cavities that partly wraps in trunnion shaft mounting hole (2) right side in the inboard of described casing, described separate cavities, from the top of casing, extends downwardly into bottom half along the right side wall of casing; Be provided with dividing plate (4) in described separate cavities, separate cavities is divided into to Oil-gas Separation ante-chamber (5) Oil-gas Separation back cavity (14) and oil back chamber (6), have the inlet hole (8) communicated with Oil-gas Separation ante-chamber (5) on described casing, the axis of described inlet hole (8) is parallel with the axis of crank mounting hole (1); Be provided with cylinder attachment face (13) at described casing top, between described crank mounting hole (1) and cylinder centerline (9), have eccentric distance e, and e>0.
Set up Oil-gas Separation ante-chamber, Oil-gas Separation back cavity and oil back chamber and inlet hole on right crankcase.Be provided with Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber and exhaust nozzle on left crankcase.Oil-gas Separation ante-chamber on left crankcase, Oil-gas Separation back cavity, oil back chamber are corresponding one by one with Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber on right crankcase.Left and right crankcases snaps together and forms Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber totally three cavitys independently; Equally, on the dividing plate of crankcase, be 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.Formed a complete respiratory system 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, prevented the overpressure in crankcase body, machine oil after separation flows to oil back chamber through the Oil-gas Separation back cavity, the bottom of oil back chamber is provided with return opening (return opening is arranged on left crankcase), flow in the oil sump in crankcase body by return opening, machine oil is carried out to recycling.Simultaneously, crank is designed to eccentric structure, to reduce the side pressure of piston, mentions the reliability of engine operation.
Except the periphery of casing is provided with outside mould assembling bolt hole (10), also be provided with interior mould assembling bolt hole (11) in casing, described interior mould assembling bolt hole (11) is arranged on the rib that casing extends internally.By increase interior mould assembling bolt around crankshaft cavity, thereby improve the rigidity of motor, reach the purpose that reduces engine noise.
Be provided with oil pump mounting hole (12) on described casing, 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 to be arranged on motor as independent parts, the pump housing, oil pump cover, internal rotor, external rotor, oil pump shaft, consists of, and oil pump need to arrange separately the pump housing, and offers oil inlet hole and oil outlet on the pump housing, and manufacture cost is high.This structure to right crankcase, is used the Function Integration Mechanism of oil pump right crankcase and is installed as the pump housing of oil pump, 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 separately the pump housing, are guaranteeing to have reduced the manufacture cost of oil pump under the prerequisite that the pump functional oil is realized.
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 the same level line with the axis of crank mounting hole (1), on 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 has taken the space of casing upper right quarter, the trunnion shaft mounting hole moves down layout, preferably and the crank mounting hole on the same level line.
The beneficial effects of the utility model:
(1) Oil-gas Separation ante-chamber, Oil-gas Separation back cavity and oil back chamber, inlet hole have been set up on right crankcase, correspondingly, Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber, exhaust nozzle are set on left crankcase, left and right crankcases snaps together and forms a complete engine breathing system, avoided occurring in the casing phenomenon of overpressure, simultaneously, the energy separation oil and gas, reduce the oil consumption of motor, reduce air pollution emission;
(2) there are eccentric distance in crank mounting hole and cylinder centerline, make the eccentric installation of crank, to reduce the side pressure of piston, improve engine reliability;
(3) by around crankshaft cavity, increasing interior mould assembling bolt, with outer mould assembling bolt, combine the rigidity that improves motor, reach the purpose that reduces engine noise;
(4) use crankcase body and installed as the pump housing of oil pump, make oil pump develop into split-type structural from traditional monolithic construction, reduced the manufacture cost of oil pump.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model (from a side of left crankcase).
The rear view that Fig. 2 is Fig. 1.
The A-A sectional view that Fig. 3 is Fig. 1.
The B that Fig. 4 is Fig. 1 is to revolved view.
The C-C revolved sectional view that Fig. 5 is Fig. 2.
The structural representation that Fig. 6 is the left crankcase supporting with the utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
The right crankcase of motorcycle engine as shown in Figure 1 and Figure 2 is provided with crank mounting hole 1 and trunnion shaft mounting hole 2 on casing.Trunnion shaft mounting hole 2 is positioned at the right side of crank mounting hole 1.Shown in Fig. 1, Fig. 3, bearing hole mold insert 3 is housed in crank mounting hole 1.Figure 1 shows that the inboard of right crankcase, i.e. a side of close left crankcase; Figure 2 shows that the outside of right crankcase, i.e. a side of close right crankcase cover.
Be provided with the separate cavities that partly wraps in trunnion shaft mounting hole 2 right sides in the inboard of casing.Separate cavities, from the top of casing, extends downwardly into bottom half along the right side wall of casing.For vacating space is arranged 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 is divided into to Oil-gas Separation ante-chamber 5, Oil-gas Separation back cavity 14, oil back chamber 6.Have the inlet hole 8 communicated with Oil-gas Separation ante-chamber 5 on casing, the axis of inlet hole 8 is parallel with the axis of crank mounting hole 1.Shown in Fig. 1, Fig. 4, also be provided with cylinder attachment face 13 on casing, there is eccentric distance e between crank mounting hole 1 and cylinder centerline 9, 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 the same level line with the axis of crank mounting hole 1, on the dividing plate 4 between Oil-gas Separation back cavity 14 and oil back chamber 6, is provided with breach 4a.
In conjunction with Fig. 1, Fig. 2, except the periphery of casing is provided with outside several mould assembling bolts hole 10, also be provided with interior mould assembling bolt hole 11 in casing, interior mould assembling bolt hole 11 is arranged on the rib that casing extends internally.The quantity of interior mould assembling bolt hole 11 arranges as required, is preferably three, is looped around the distribution triangular in shape on every side of crankshaft cavity.
Shown in Fig. 2, Fig. 5, be provided with oil pump mounting hole 12 on casing, oil pump mounting hole 12 be positioned at trunnion shaft mounting hole 2 below and with vertical the communicating of oil leab 16 of casing, be provided with the oil inlet hole 7 communicated with oil pump mounting hole 12 at bottom half.
Figure 6 shows that the left crankcase of setting corresponding to the utility model, on left crankcase, be 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 ' be corresponding one by one with Oil-gas Separation ante-chamber 5, Oil-gas Separation back cavity 14, oil back chamber 6 on right crankcase respectively; Oil-gas Separation ante-chamber 5 ' and Oil-gas Separation back cavity 6a ' between, between Oil-gas Separation back cavity 6a ' and oil back chamber 6b ', respectively by dividing plate 4 ' separate, every dividing plate 4 ' be provided with breach, make two adjacent individual cavity connections.
Left and right crankcases snaps together and forms Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber totally three cavitys independently.Formed a complete respiratory system 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, prevented the overpressure in crankcase body, machine oil after separation flows to oil back chamber through the Oil-gas Separation back cavity, the bottom of oil back chamber is provided with return opening E, by return opening E, flows in the oil sump in crankcase body.Inlet hole is communicated with crankcase, and exhaust nozzle is communicated with atmosphere, and oil back chamber directly is communicated with oil sump and return opening E is positioned at below the oil sump pasta, can effectively prevent that the oil gas in crankcase from reentering engine breathing system through return opening.
Claims (5)
1. the right crankcase of a motorcycle engine, be provided with crank mounting hole (1) and trunnion shaft mounting hole (2) on casing, described trunnion shaft mounting hole (2) is positioned at the right side of crank mounting hole (1), bearing hole mold insert (3) is housed in crank mounting hole (1), it is characterized in that: be provided with the separate cavities that partly wraps in trunnion shaft mounting hole (2) right side in the inboard of described casing, described separate cavities, from the top of casing, extends downwardly into bottom half along the right side wall of casing; Be provided with dividing plate (4) in described separate cavities, separate cavities is divided into to Oil-gas Separation ante-chamber (5), Oil-gas Separation back cavity (14) and oil back chamber (6), have the inlet hole (8) communicated with Oil-gas Separation ante-chamber (5) on described casing, the axis of described inlet hole (8) is parallel with the axis of crank mounting hole (1); Be provided with cylinder attachment face (13) at described casing top, between described crank mounting hole (1) and cylinder centerline (9), have eccentric distance e, and e>0.
2. according to the right crankcase of motorcycle engine claimed in claim 1, it is characterized in that: except the periphery of casing is provided with outside mould assembling bolt hole (10), also be provided with interior mould assembling bolt hole (11) in casing, described interior mould assembling bolt hole (11) is arranged on the rib that casing extends internally.
3. according to the right crankcase of claim 1 or 2 described motorcycle engine, it is characterized in that: be provided with oil pump mounting hole (12) on described casing, 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 the right crankcase of motorcycle engine claimed in 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 the right crankcase of motorcycle engine claimed in 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 the same level line with the axis of crank mounting hole (1), on the 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 |
|---|---|---|---|
| CN2013203777376U CN203335266U (en) | 2013-06-28 | 2013-06-28 | Right crankcase of motorcycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203777376U CN203335266U (en) | 2013-06-28 | 2013-06-28 | Right crankcase of motorcycle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203335266U true CN203335266U (en) | 2013-12-11 |
Family
ID=49703943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203777376U Expired - Lifetime CN203335266U (en) | 2013-06-28 | 2013-06-28 | Right crankcase of motorcycle engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203335266U (en) |
-
2013
- 2013-06-28 CN CN2013203777376U patent/CN203335266U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
|
| CX01 | Expiry of patent term |