CN102410103B - Crankcase structure of motorcycle engine - Google Patents
Crankcase structure of motorcycle engine Download PDFInfo
- Publication number
- CN102410103B CN102410103B CN 201110307235 CN201110307235A CN102410103B CN 102410103 B CN102410103 B CN 102410103B CN 201110307235 CN201110307235 CN 201110307235 CN 201110307235 A CN201110307235 A CN 201110307235A CN 102410103 B CN102410103 B CN 102410103B
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- cavity
- crankcase
- crankshaft
- speed change
- spill port
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- Lubrication Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a structure design of a motorcycle engine, in particular to a crankcase structure of the motorcycle engine. A left crankshaft cavity (2) and a left variable speed cavity (6) in a left crankcase body are independent cavities; a right crankshaft cavity (10) and a right variable speed cavity (12) in a right crankcase body are independent cavities; a variable speed cavity and a crankshaft cavity independent from each other are formed in the crankcase of the motorcycle engine after the left crankcase body (1) and the right crankcase body (9) are combined; the lubricating oil in the crankshaft cavity is communicated to a clutch cavity (8) through a one-way oil return hole (4) and a one-way oil return valve (7); and the clutch cavity (8) is communicated with the variable speed cavity through the oil return hole to form a circulating oil pipe of the lubricating oil. The structure design can avoid damage to the crankshaft by the scrap iron in the lubricating oil, avoid damage to the other party in high-speed running by falling part fragments due to damage of main and auxiliary shafts or the crankshaft, and effectively reduce the consumption of the lubricating oil in the engine.
Description
Technical field
The present invention relates to a kind of structural design of motorcycle engine, particularly relate to a kind of crankcase structure of motorcycle engine.
Background technique
At present, what the crankshaft cavity in the domestic crankshaft box of motorcycle engine and speed change cavity adopted all is integral structure, that is: be designed with respectively independent left crankcase and the right crankcase of making, described left crankcase and right crankcase consist of the crankcase of motor through involutory connection; Crankshaft cavity of the prior art and speed change cavity all are arranged in the casing, and mutually penetrating.The defective that this structural design causes is: in engine operation process, lubricant oil can free-flow between crankshaft cavity and speed change cavity in the machine, so that the iron filings that produced by major-minor shaftgear engagement running in the speed change cavity enter into crankshaft cavity with lubricant oil easily, the bent axle that runs up is caused damage; And when major-minor shaftgear and bent axle have a side to occur damaging in the two, the component fragment that comes off causes damage to the opposing party who runs up easily, causes that secondary damages; In addition, because the crankshaft cavity working pressure is high, high pressure can be delivered in the speed change cavity, and the breathing pipe that lubricant oil is passed through in the speed change cavity runs off, and causes the minimizing of lubricant oil in the machine, needs continuous make-up oil.
Summary of the invention
The objective of the invention is to propose a kind of crankcase structure of motorcycle engine, to solve the existing problem of structural design of existing crankshaft box of motorcycle engine.
The present invention finishes the technological scheme that its invention task takes: a kind of crankcase structure of motorcycle engine, have respectively independent left crankcase and the right crankcase of making, and described left crankcase has left crankshaft cavity and left speed change cavity; The back side at left crankcase is provided with clutch cavity; Described right crankcase has right crankshaft cavity and right speed change cavity; Described left crankcase and right crankcase consist of the crankcase of motor through involutory connection; The described left crankshaft cavity that is positioned at left crankcase and left speed change cavity are served as reasons and are cut off the separate chamber that I is separated into; Be provided with spill port in described left speed change cavity, the spill port in the described left speed change cavity is communicated with clutch cavity; Be provided with the unidirectional spill port that is communicated with left crankshaft cavity and clutch cavity in the bottom of described left crankshaft cavity; The port of leading to clutch cavity at unidirectional spill port is provided with unidirectional scavenger valve; The described right crankshaft cavity that is positioned at right crankcase and right speed change cavity are served as reasons and are cut off the separate chamber that II is separated into; After left crankcase and right crankcase mould assembling are integrally togather, partition I in the described left crankcase and the partition II in the right crankcase cooperatively interact airtight, make described left crankshaft cavity and described right crankshaft cavity form the crankshaft cavity of a sealing, described left speed change cavity and described right speed change cavity form the speed change cavity of a sealing; In described crankshaft box of motorcycle engine, form separate speed change cavity and crankshaft cavity; Crankshaft cavity is communicated with clutch cavity by unidirectional spill port and unidirectional scavenger valve, and described clutch cavity is communicated with speed change cavity by spill port, consists of the circulating oil path of lubricant oil.
The crankcase structure of motorcycle engine that the present invention proposes, because speed change cavity and crankshaft cavity are independent of one another, the lubricant oil of crankshaft cavity and speed change cavity each other can not free-flow, the iron filings that speed change cavity middle gear engagement running produces just can not enter crankshaft cavity, thereby can the bent axle that run up not caused damage, and can avoid because of major-minor shaftgear or Crank shaft Damage, the component fragment that comes off causes secondary damage to the opposing party who runs up, and prolongs the working life of motor; Simultaneously, because crankshaft cavity and speed change cavity are independent of one another, the high pressure in the crankshaft cavity has seldom that a part can be delivered to speed change cavity, and flowing to extraneous lubricant oil by the speed change cavity Center Vent tube will reduce, and has reduced the consumption of lubricant oil in the machine.
Description of drawings
Fig. 1 is left crankcase structural representation among the present invention.
Fig. 2 is the rear view of Fig. 1.
Fig. 3 is right crankcase structural representation among the present invention.
Among the figure: 1, left crankcase, 2, left crankshaft cavity, 3, cut off I, 4, unidirectional spill port, 5-a, the first spill port, 5-b, the second spill port, 5-c, the 3rd spill port, 6, left speed change cavity, 7, unidirectional scavenger valve, 8, clutch cavity, 9, right crankcase, 10, right crankshaft cavity, 11, cut off II, 12, right speed change cavity.
Embodiment
The invention will be further described below in conjunction with drawings and Examples, but do not consist of any limitation of the invention.
Such as Fig. 1, Fig. 2, shown in Figure 3, a kind of crankcase structure of motorcycle engine has respectively independent left crankcase 1 and the right crankcase 9 of making, and described left crankcase 1 and right crankcase 9 consist of the crankcase of motor through involutory connection; Described left crankcase 1 has left crankshaft cavity 2 and left speed change cavity 6; Between left crankshaft cavity 2 and left speed change cavity 6, be provided with and cut off I3; In left speed change cavity 6, be provided with three spill port 5-a, 5-b, 5-c; Be provided with clutch cavity 8 at the back side of described left crankcase 1; Spill port in the described left speed change cavity is communicated with clutch cavity 8; Described spill port is three, that is: the first spill port 5-a, the second spill port 5-b, the 3rd spill port 5-c; Be provided with the unidirectional spill port 4 that is communicated with left crankshaft cavity 2 and clutch cavity 8 in the bottom of left crankshaft cavity 2; Described right crankcase 9 is provided with right crankshaft cavity 10 and right speed change cavity 12, the port that unidirectional spill port 4 leads to clutch cavity 8 is provided with unidirectional scavenger valve 7, in engine operation process, high pressure in the crankshaft cavity is opened unidirectional scavenger valve 7, make lubricant oil pass through unidirectional spill port 4, flow in the clutch cavity by crankshaft cavity; When engine shutdown, unidirectional scavenger valve 7 cuts out, and lubricant oil can not flow mutually in crankshaft cavity and the clutch cavity.Described right crankcase 9 has right crankshaft cavity 10 and right speed change cavity 12; Between right crankshaft cavity 10 and right speed change cavity 12, be provided with and cut off II11; After left crankcase 1 and right crankcase 9 mould assembling, cutting off I 3 cooperates airtight with partition II11, left crankshaft cavity 2 and right crankshaft cavity 10 form the crankshaft cavity of a sealing, and left speed change cavity 6 and right speed change cavity 12 form the speed change cavity of a sealing, make speed change cavity and crankshaft cavity independent of one another.Lubricant oil in the crankshaft cavity flows to clutch cavity 8 by unidirectional spill port 4, unidirectional scavenger valve 7, flows to speed change cavity through three spill port 5-a, 5-b, 5-c again, finishes the circulation of lubricant oil.
Claims (2)
1. a crankcase structure of motorcycle engine has respectively independent left crankcase (1) and the right crankcase (9) of making, and described left crankcase (1) has left crankshaft cavity (2) and left speed change cavity (6); Be provided with clutch cavity (8) at the back side of left crankcase (1); Described right crankcase (9) has right crankshaft cavity (10) and right speed change cavity (12); Described left crankcase (1) and right crankcase (9) consist of the crankcase of motor through involutory connection; It is characterized in that: the described left crankshaft cavity (2) that is positioned at left crankcase is served as reasons with left speed change cavity (6) and is cut off the separate chamber that I (3) is separated into; Be provided with spill port in described left speed change cavity, the spill port in the described left speed change cavity is communicated with clutch cavity (8); Has the unidirectional spill port (4) that is communicated with left crankshaft cavity (2) and clutch cavity (8) in the bottom of described left crankshaft cavity (2); The port of leading to clutch cavity (8) at unidirectional spill port (4) is provided with unidirectional scavenger valve (7); The described right crankshaft cavity (10) that is positioned at right crankcase is served as reasons with right speed change cavity (12) and is cut off the separate chamber that II (11) is separated into; After left crankcase (1) is integrally togather with right crankcase (9) mould assembling, partition I (3) in the described left crankcase and the partition II (11) in the right crankcase cooperatively interact airtight, make described left crankshaft cavity (2) and described right crankshaft cavity (10) form the crankshaft cavity of a sealing, described left speed change cavity (6) and described right speed change cavity (12) form the speed change cavity of a sealing; In described crankshaft box of motorcycle engine, form separate speed change cavity, crankshaft cavity; Lubricant oil in the crankshaft cavity is communicated with clutch cavity (8) by unidirectional spill port (4) and unidirectional scavenger valve (7), and described clutch cavity (8) is communicated with speed change cavity by spill port, consists of the circulating oil path of lubricant oil.
2. a kind of crankcase structure of motorcycle engine according to claim 1 is characterized in that: the spill port in the described left speed change cavity is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110307235 CN102410103B (en) | 2011-09-30 | 2011-09-30 | Crankcase structure of motorcycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110307235 CN102410103B (en) | 2011-09-30 | 2011-09-30 | Crankcase structure of motorcycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102410103A CN102410103A (en) | 2012-04-11 |
| CN102410103B true CN102410103B (en) | 2013-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110307235 Active CN102410103B (en) | 2011-09-30 | 2011-09-30 | Crankcase structure of motorcycle engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102410103B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4021068B2 (en) * | 1998-09-14 | 2007-12-12 | 本田技研工業株式会社 | V-type internal combustion engine for motorcycles |
| EP1523614B1 (en) * | 2002-06-07 | 2009-10-28 | Brumby Corporation Limited | Motorcycle engine |
| CN2740784Y (en) * | 2004-09-23 | 2005-11-16 | 重庆王冠摩托车工业有限公司 | Lubricating mechanism of speed variator for engine |
| CN202300698U (en) * | 2011-09-30 | 2012-07-04 | 洛阳北方企业集团有限公司 | Crankcase structure of motorcycle engine |
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2011
- 2011-09-30 CN CN 201110307235 patent/CN102410103B/en active Active
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| Publication number | Publication date |
|---|---|
| CN102410103A (en) | 2012-04-11 |
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