CN200999639Y - Crankshaft case air changing structure of four-stroke cycle engine - Google Patents
Crankshaft case air changing structure of four-stroke cycle engine Download PDFInfo
- Publication number
- CN200999639Y CN200999639Y CNU2006200699500U CN200620069950U CN200999639Y CN 200999639 Y CN200999639 Y CN 200999639Y CN U2006200699500 U CNU2006200699500 U CN U2006200699500U CN 200620069950 U CN200620069950 U CN 200620069950U CN 200999639 Y CN200999639 Y CN 200999639Y
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- oil
- valve
- gas separation
- crankcase
- cylinder head
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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to a crankcase air renewal mechanism for a four cycle engine, which belongs to the technical field of power set. The utility model is characterized in that: an oil-gas separation cavity is positioned at the top a cylinder cap and is communicated with an air door control room via a through passage; the oil-gas separation cavity is connected to a clapboard to form an oil-gas separation room; an one-way valve is arranged at the upper section of the oil-gas separation room; a cylinder cap passage is positioned at the upper section of the one-way valve; an inclined hole is arranged on the cylinder cap passage; another end of the inclined hole is communicated with the cylinder cap and enters an air inlet pipe via a cylinder cap passage; a back oil hole is arranged between the inclined hole and the oil-gas separation room. With simple, compact and feasible structure, the utility model can suck the residual air in the crankcase into the air inlet pipe via the communication passage during the operation of engine and the residual air then enters a combustion room for combustion, so as to realize the separation of oil mist, prevent the lubricant oil from entering the suction system and ensure excellent back oil effect. Besides, because the whole structure is arranged inside the engine, the utility model adds no size, realizes excellent space efficiency and ensures the light weight of engine.
Description
Technical field
The utility model relates to a kind of air-exchanging structure of crank case of four stroke engine, specifically when motor moves, can stop lubricant oil to enter suction system effectively, has played good mist of oil separating effect again simultaneously, belongs to field of power equipment technology.
Background technique
During engine operation, bleed in the crankcase in a part of mixed air in the cylinder and the gap of waste gas between piston ring and cylinder wall, to make machine oil thinning after wherein fuel-steam condenses, shorten the life time of machine oil, waste gas can play strong corrosive action to part, cause the wearing and tearing of part, pressure raises and causes engine oil leakage; In order to prolong the life time of machine oil, reduce the wearing and tearing of part, prevent engine oil leakage, must displacement gas mechanism be discharged by waste gas.Air-exchanging structure must be discharged waste gas effectively and can well mist of oil be separated again, prevents that lubricant oil from entering suction system; Lubricant oil will have good isolation effect when this structure present position and motor operation, ventilation mechanism does not often have good oil return effect in general motor, and one-way valve adopts sheet type, this one-way valve often weares and teares when long-term the use, and is aging, distortion, or follow the string, appearance is not opened, or does not reset, and causes engine oil leakage.
In prior art, in the common ventilation chamber structure, internal-combustion engine is installed subsidiary engine by the subsidiary engine carriage at the sidewall of cylinder block, forms ventilation chamber between the sidewall of cylinder block and subsidiary engine carriage.This structure need increase component, and complex structure is difficult for realizing lightweight.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, thereby provide a kind of and can provide a compactness to motor, reliable air-exchanging structure, when motor moves, can be with residual gas in the crankcase through communication passage, the suction suction tude enters the firing chamber and burns, and has played the mist of oil separation simultaneously again and has stoped lubricant oil to enter suction system and good oil return effect; Integral arrangement is at engine interior, and no virtually any size increases, and space efficiency is good, has guaranteed the air-exchanging structure of crank case of the light-weighted four stroke engine of motor.
Main solution of the present utility model is achieved in that
The body 1 of the utility model motor is combined by casing 7 and cylinder liner 8 and cylinder head 9, crankcase 6 is to be combined by casing 7 and crankcase cover 2, rotatable supported bent axle 4 is set in crankcase 6, lubricant oil 35 is housed in the crankcase 6, valve control cab 5 is to be combined by cylinder head 9 and valve mechanism cover 3, valve control cab 5 and crankcase 6 UNICOMs, piston 10 is connected on the crank pin that supports bent axle 4 by connecting rod 11, cylinder head 9 and firing chamber 19 UNICOMs, suction system 20 is bearing on the cylinder head 9 and suction port 17 UNICOMs, valve mechanism cover 3 is positioned at cylinder head 9 tops, feature is that valve mechanism cover 3 tops are provided with Oil-gas Separation chamber 23, Oil-gas Separation chamber 23 surrounds the labyrinth by three labyrinth shape wall-formings 36, by through channel 37 UNICOM's valve control cabs 5, Oil-gas Separation chamber 23 connects dividing plate 25, form Oil- gas Separation chamber 26,26 tops, Oil-gas Separation chamber are provided with one-way valve 27, valve mechanism cover passage 33 is positioned at the top of one-way valve 27, valve mechanism cover passage 33 is provided with slope hole 38, slope hole 38 is sealed its end by stopping up 39, the other end and cylinder head 9 UNICOMs, enter suction tude 14 by cylinder head communication passage 41,26 of slope hole 38 on the valve mechanism cover passage 33 and Oil-gas Separation chambers are provided with spill port 34.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; When motor moves, can be with residual gas in the crankcase through communication passage, the suction suction tude enters the firing chamber and burns, and has played the mist of oil separation simultaneously again and has stoped lubricant oil to advance people's suction system and good oil return effect; Integral arrangement is at engine interior, and no virtually any size increases, and space efficiency is good, has guaranteed the motor lightweight.
Description of drawings
Fig. 1 is the utility model structure longitudinal section.
Fig. 2 is the cross-sectional figure of the utility model structure.
Fig. 3 be the cross-sectional position A of the utility model structure to worm's eye view;
Fig. 4 is the utility model structure position A-A sectional view.
Embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
The utility model is mainly by the body 1 of motor, crankcase cover 2, valve mechanism cover 3, support bent axle 4, valve control cab 5, crankcase 6, engine housing 7, cylinder liner 8, cylinder head 9, piston 10, connecting rod 11, connnecting rod big end connecting rod cap 12, connecting rod gets rid of spindle 13, ball bearing 15, bearing support 16, suction port 17, relief opening 18, firing chamber 19, suction system 20, air-strainer 21, Carburetor 22, Oil-gas Separation chamber 23, screw 24, dividing plate 25, Oil-gas Separation chamber 26, one-way valve 27, unidirectional valve opening 28, valve seat 29, baton round 30, straight pin 31, seal ring 32, valve mechanism cover passage 33, spill port 34, lubricant oil 35, labyrinth shape wall-forming 36, through channel 37, slope hole 38, stop up 39, hollow locating stud 40, cylinder head communication passage 41, suction tude 14 compositions such as grade.
As shown in Figure 1: the utility model provides a kind of four stroke engine, and the body 1 of motor is combined by casing 7 and cylinder liner 8 and cylinder head 9.This crankcase 6 is to be combined by casing 7 and crankcase cover 2, and rotatable support bent axle 4 is set in crankcase 6, and lubricant oil 35 is housed in crankcase 6.When engine operation, this support bent axle 4 is in level, and valve control cab 5 is to be combined by cylinder head 9 and valve mechanism cover 3, this valve control cab 5 and crankcase 6 UNICOMs, and piston 10 is connected on the crank pin that supports bent axle 4 by connecting rod 11.Connecting rod gets rid of spindle 13 and is used in crankcase 6 disperseing lubricant oil 35 on the connnecting rod big end connecting rod cap 12, and it and connnecting rod big end connecting rod cap 12 integral body are made.Supporting the two ends of bent axle 4 supports by ball bearing 15 and bearing support 16.Cylinder head 9 comprises suction port 17 and relief opening 18, they can with firing chamber 19 UNICOMs.
As shown in Figure 2: suction system 20 comprises air-strainer 21 and Carburetor 22.Suction system 20 is supported on the cylinder head 9, in order to carry out UNICOM with suction port 17.
Shown in Fig. 3,4: valve mechanism cover 3 is positioned at cylinder head 9 tops, these valve mechanism cover 3 tops are provided with an Oil-gas Separation chamber 23, this chamber surrounds the labyrinth by three labyrinth shape wall-formings 36, and by through channel 37 UNICOM's valve control cabs 5, this Oil-gas Separation chamber 23 connects dividing plate 25 through screw 24, forms Oil-gas Separation chamber 26.One-way valve 27 is equipped with on these 26 tops, Oil-gas Separation chamber, and one-way valve 27 is by unidirectional valve opening 28, valve seat 29, baton round 30, and straight pin 31 and seal ring 32 are formed.Hole end surface is a valve seat 29 in the unidirectional valve opening 28, and baton round 30 is installed in valve seat 29, and garden pin 31 is installed in unidirectional valve opening 28 tops, places restrictions on the stroke of baton round 30, and seal ring 32 is contained in unidirectional valve opening 28 outer rings, seals.Valve mechanism cover passage 33 is positioned at the top of one-way valve 27, the valve mechanism cover passage is provided with slope hole 38 for 33 1 sections, these slope hole 38 1 ends are sealed its end by stopping up 39, the other end is by hollow locating stud 40 and cylinder head 9 UNICOMs, enter suction tude 14 by cylinder head communication passage 41, a spill port 34 is bored in 26 of valve mechanism cover passage 33 updip inclined holes 38 and Oil-gas Separation chambers, and these spill port 34 separable lubricant oil prevent that lubricant oil from entering suction system.This one-way valve 27 is installed in the unidirectional valve opening 28.
Working principle of the present utility model and working procedure:
When the utility model drives 4 rotations of support bent axle when engine piston 10, getting rid of spindle 13 by connecting rod splashes out parts of lubricating oil 35, arrive air door operation chamber 5 with the mist of oil form through crankcase 6, ventilation gas appears in the crankcase 6 simultaneously, this ventilation gas enters valve control cab 5 by crankcase 6, enter Oil-gas Separation chamber 26 through through channel 37, along with piston 10 to-and-fro motion, produce pressure pulse in the crankcase 6, the baton round 30 of one-way valve 27 is opened, ventilation gas enters valve mechanism cover passage 33, enters cylinder head communication passage 41 through valve mechanism cover passage 33 by hollow locating stud 40 and sucks suction tude 14, enters firing chamber 19 through intake valve.When the ventilation gas through the Oil-gas Separation chamber, labyrinth shape wall-forming 36 carries out the mist of oil separation with oil gas in it, again through through channel 37 to returning crankcase 6, ventilation gas enters and carries out a mist of oil behind the valve mechanism cover passage 33 again and separate and return Oil-gas Separation chamber 26 through spill port 34, thereby has strengthened the mist of oil separating property; One-way valve 27 is installed in the unidirectional valve opening in addition, seal ring 32 can stop mist of oil to enter valve mechanism cover passage 33 reliably when one-way valve 27 is closed, baton round 30 is the energy flexible motion in valve seat 29, and can prevent that sucking too much gas by suction system 20 enters crankcase 6 at self-return under the action of gravity.
In a word, this structural configuration is at engine interior, and no virtually any size increases, and residual gas in the crankcase can be sucked suction tude through communication passage on the one hand, enters the firing chamber and burns.Played simultaneously the mist of oil separation again and stoped lubricant oil to advance people's suction system and good oil return effect, space efficiency is good, can be applicable to any four stroke engine.
Claims (2)
1, a kind of air-exchanging structure of crank case of four stroke engine, engine body (1) comprises casing (7) and cylinder liner (8) and cylinder head (9), crankcase (6) is combined by casing (7) and crankcase cover (2), in crankcase (6), be provided with and support bent axle (4), lubricant oil (35) is housed in the crankcase (6), valve control cab (5) is made up of cylinder head (9) and valve mechanism cover (3), valve control cab (5) and crankcase (6) UNICOM, piston (10) is connected on the crank pin that supports bent axle (4) by connecting rod (11), cylinder head (9) and firing chamber (19) UNICOM, suction system (20) is bearing in cylinder head (9) and goes up and suction port (17) UNICOM, valve mechanism cover (3) is positioned at cylinder head (9) top, it is characterized in that valve mechanism cover (3) top is provided with Oil-gas Separation chamber (23), through channel (37) UNICOM's valve control cab (5), Oil-gas Separation chamber (23) connects dividing plate (25), form Oil-gas Separation chamber (26), top, Oil-gas Separation chamber (26) is provided with one-way valve (27), valve mechanism cover passage (33) is positioned at the top of one-way valve (27), valve mechanism cover passage (33) is provided with slope hole (38), slope hole (38) is sealed its end by stopping up (39), the other end and cylinder head (9) UNICOM, enter suction tude (14) by cylinder head channel (41), be provided with spill port (34) between the slope hole (38) on the valve mechanism cover passage (33) and Oil-gas Separation chamber (26).
2, the air-exchanging structure of crank case of four stroke engine according to claim 1, it is characterized in that described one-way valve (27) is made up of unidirectional valve opening (28), valve seat (29), baton round (30), straight pin (31) and seal ring (32), the interior hole end surface of unidirectional valve opening (28) is valve seat (29), baton round (30) is installed in valve seat (29), straight pin (31) is installed in unidirectional valve opening (28) top, and seal ring (32) is contained in unidirectional valve opening (28) outer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200699500U CN200999639Y (en) | 2006-03-08 | 2006-03-08 | Crankshaft case air changing structure of four-stroke cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200699500U CN200999639Y (en) | 2006-03-08 | 2006-03-08 | Crankshaft case air changing structure of four-stroke cycle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200999639Y true CN200999639Y (en) | 2008-01-02 |
Family
ID=39014046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200699500U Expired - Fee Related CN200999639Y (en) | 2006-03-08 | 2006-03-08 | Crankshaft case air changing structure of four-stroke cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200999639Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106795789A (en) * | 2014-10-07 | 2017-05-31 | 布鲁斯密封系统有限公司 | For the Vent Module of internal combustion engine |
-
2006
- 2006-03-08 CN CNU2006200699500U patent/CN200999639Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106795789A (en) * | 2014-10-07 | 2017-05-31 | 布鲁斯密封系统有限公司 | For the Vent Module of internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080102 |