CN102410103A - Crankcase structure of motorcycle engine - Google Patents
Crankcase structure of motorcycle engine Download PDFInfo
- Publication number
- CN102410103A CN102410103A CN2011103072351A CN201110307235A CN102410103A CN 102410103 A CN102410103 A CN 102410103A CN 2011103072351 A CN2011103072351 A CN 2011103072351A CN 201110307235 A CN201110307235 A CN 201110307235A CN 102410103 A CN102410103 A CN 102410103A
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- CN
- China
- Prior art keywords
- cavity
- crankcase
- crankshaft
- speed change
- change chamber
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- 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.)
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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 structural design of a motorcycle engine, in particular to a crankcase structure of the motorcycle engine, wherein a left crankshaft cavity (2) and a left speed changing cavity (6) which are positioned in a left crankshaft box body are mutually independent cavities; a right crank shaft cavity (10) and a right speed changing cavity (12) which are positioned in the right crank shaft box body are mutually independent cavities; after the left crankcase body (1) and the right crankcase body (9) are combined, a speed changing cavity and a crankshaft cavity which are mutually independent are formed in a crankcase of a motorcycle engine; lubricating oil in the crankshaft cavity is communicated with 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 a speed change cavity through an oil return hole to form a circulating oil path of the lubricating oil. The structural design provided by the invention can avoid the damage of scrap iron in lubricating oil to the crankshaft, avoid the damage of broken parts and fragments of main and auxiliary shafts or the crankshaft to the other side running at high speed, and effectively reduce the consumption of 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 crankshaft box of motorcycle engine structure.
Background technique
At present; What adopted in crankshaft cavity in the domestic crankshaft box of motorcycle engine and speed change chamber all is integral structure; That is: be designed with independent respectively left crankcase and the right crankcase of making, described left crankcase and right crankcase constitute the crankcase of motor through involutory connection; Crankshaft cavity of the prior art and speed change chamber all are arranged in the casing, and penetrating each other.The defective that this structural design caused is: in engine operation process; Lubricant oil can free-flow between crankshaft cavity and speed change chamber in the machine; Make the iron filings that produce by major-minor shaftgear engagement running in the speed change chamber 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 chamber, and the breathing pipe that lubricant oil is passed through in the speed change chamber 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 crankshaft box of motorcycle engine structure, to solve the existing problem of structural design of existing crankshaft box of motorcycle engine.
The present invention accomplishes the technological scheme that its invention task taked: a kind of crankshaft box of motorcycle engine structure, have independent respectively left crankcase and the right crankcase of making, and described left crankcase has left crankshaft cavity and left speed change chamber; The back side at left crankcase is provided with clutch cavity; Described right crankcase has right crankshaft cavity and right speed change chamber; Described left crankcase and right crankcase constitute the crankcase of motor through involutory connection; Serve as reasons and cut off the separate chamber that I is separated in described left crankshaft cavity that is positioned at left crankcase and left speed change chamber; In described left speed change chamber, be provided with spill port, the spill port in the described left speed change chamber 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; Serve as reasons and cut off the separate chamber that II is separated in described right crankshaft cavity that is positioned at right crankcase and right speed change chamber; Left crankcase is with after the right crankcase mould assembling connects one; 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 chamber and described right speed change chamber form the speed change chamber of a sealing; In described crankshaft box of motorcycle engine, form separate speed change chamber and crankshaft cavity; Crankshaft cavity is communicated with clutch cavity through unidirectional spill port and unidirectional scavenger valve, and described clutch cavity is communicated with the speed change chamber through spill port, constitutes the circulating oil path of lubricant oil.
The crankshaft box of motorcycle engine structure that the present invention proposes; Because speed change chamber and crankshaft cavity are independently of one another, the lubricant oil in crankshaft cavity and speed change chamber each other can not free-flow, and the turn round iron filings of generation of speed change chamber middle gear engagement 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 chamber are independently of one another, the high pressure in the crankshaft cavity has seldom that a part can be delivered to the speed change chamber, and flowing to extraneous lubricant oil through speed change chamber Center Vent tube will reduce, and has reduced the consumption of the interior lubricant oil of 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, first spill port, 5-b, second spill port, 5-c, the 3rd spill port, 6, left speed change chamber; 7, unidirectional scavenger valve, 8, clutch cavity, 9, right crankcase; 10, right crankshaft cavity, 11, cut off II, 12, right speed change chamber.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further, but does not constitute any restriction of the present invention.
Like Fig. 1, Fig. 2, shown in Figure 3, a kind of crankshaft box of motorcycle engine structure has independent respectively left crankcase of making 1 and right crankcase 9, and described left crankcase 1 and right crankcase 9 constitute the crankcase of motor through involutory connection; Described left crankcase 1 has left crankshaft cavity 2 and left speed change chamber 6; Between left crankshaft cavity 2 and left speed change chamber 6, be provided with and cut off I3; In left speed change chamber 6, be provided with three spill port 5-a, 5-b, 5-c; Be provided with clutch cavity 8 at the back side of said left crankcase 1; Spill port in the described left speed change chamber 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 chamber 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, makes lubricant oil pass through unidirectional spill port 4, is flow in the clutch cavity by crankshaft cavity; When engine shutdown, unidirectional scavenger valve 7 cuts out, and lubricant oil can not flow each other in crankshaft cavity and the clutch cavity.Described right crankcase 9 has right crankshaft cavity 10 and right speed change chamber 12; Between right crankshaft cavity 10 and right speed change chamber 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; The crankshaft cavity of a left side crankshaft cavity 2 and a sealing of right crankshaft cavity 10 formation, the speed change chamber of a left speed change chamber 6 and a sealing of right speed change chamber 12 formation makes speed change chamber and crankshaft cavity independently of one another.Lubricant oil in the crankshaft cavity flows to clutch cavity 8 through unidirectional spill port 4, unidirectional scavenger valve 7, flows to the speed change chamber through three spill port 5-a, 5-b, 5-c again, accomplishes the circulation of lubricant oil.
Claims (2)
1. a crankshaft box of motorcycle engine structure has independent respectively left crankcase (1) and the right crankcase of making (9), and described left crankcase (1) has left crankshaft cavity (2) and left speed change chamber (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 chamber (12); Described left crankcase (1) and right crankcase (9) constitute 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 chamber (6) and is cut off the separate chamber that I (3) is separated into; In described left speed change chamber, be provided with spill port, the spill port in the described left speed change chamber 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 chamber (12) and is cut off the separate chamber that II (11) is separated into; Left crankcase (1) is with after right crankcase (9) mould assembling connects one; Partition I (3) in the described left crankcase and the interior partition II (11) of 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 chamber (6) and described right speed change chamber (12) form the speed change chamber of a sealing; In described crankshaft box of motorcycle engine, form separate speed change chamber, crankshaft cavity; Lubricant oil in the crankshaft cavity is communicated with clutch cavity (8) through unidirectional spill port (4) and unidirectional scavenger valve (7), and described clutch cavity (8) is communicated with the speed change chamber through spill port, constitutes the circulating oil path of lubricant oil.
2. a kind of crankshaft box of motorcycle engine structure according to claim 1 is characterized in that: described spill port 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 true CN102410103A (en) | 2012-04-11 |
| CN102410103B CN102410103B (en) | 2013-05-01 |
Family
ID=45912391
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) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107158C (en) * | 1998-09-14 | 2003-04-30 | 本田技研工业株式会社 | V-shape internal combustion engine for motor bike |
| WO2003104627A1 (en) * | 2002-06-07 | 2003-12-18 | 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 |
-
2011
- 2011-09-30 CN CN 201110307235 patent/CN102410103B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107158C (en) * | 1998-09-14 | 2003-04-30 | 本田技研工业株式会社 | V-shape internal combustion engine for motor bike |
| WO2003104627A1 (en) * | 2002-06-07 | 2003-12-18 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102410103B (en) | 2013-05-01 |
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