CN210799134U - Four-stroke gasoline engine - Google Patents
Four-stroke gasoline engine Download PDFInfo
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- CN210799134U CN210799134U CN201922104179.6U CN201922104179U CN210799134U CN 210799134 U CN210799134 U CN 210799134U CN 201922104179 U CN201922104179 U CN 201922104179U CN 210799134 U CN210799134 U CN 210799134U
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- cylinder body
- gasoline engine
- crankcase
- stroke gasoline
- crankshaft
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Abstract
The utility model discloses a four-stroke gasoline engine, it belongs to the gasoline engine field, and it has solved and has lacked a small gasoline engine among the prior art, light in weight, can invert the problem of the four-stroke gasoline engine of the long-time operation under the state of 90 degrees or upset 180 degrees in the use. The fuel tank mainly comprises a cylinder body, a piston combination, a fuel tank, a cooling system, a gas distribution mechanism, a crankcase and a carburetor, wherein the piston combination is fixed on the cylinder body, and an inlet valve, a flow guide hole and an exhaust valve are arranged on the cylinder body; the piston assembly is connected with a crankshaft, a magneto rotor is fixed at one end of the crankshaft, a magneto stator is arranged on a cylinder body and connected with a high-voltage wire, and the tail end of the high-voltage wire is connected with a spark plug; the cooling system comprises fan blades, a starter, a cylinder body shield and cooling blades on the cylinder body, wherein the fan blades are connected with a magneto rotor. The utility model discloses mainly used alleviates the weight of four-stroke gasoline engine and can be long-time operation under the state of inversion 90 degrees and slope 180 degrees.
Description
Technical Field
The utility model relates to a gasoline engine, specifically speaking especially relates to a four-stroke gasoline engine.
Background
In the fields of garden machinery, plant protection machinery, small agricultural machinery and the like, a small two-stroke gasoline engine is mostly matched. The four-stroke gasoline engine has a significant advantage in terms of emissions over the two-stroke gasoline engine. The emissions of NOx, CO and HC from four-stroke gasoline engines are significantly lower than those from two-stroke gasoline engines, so the use of four-stroke gasoline engines is of great importance in improving air quality. The small two-stroke gasoline engine matched with the fields of garden machinery, plant protection machinery, small agricultural machinery and the like currently dominates, and is mainly determined by the following two aspects:
the first and the second traditional small two-stroke gasoline engines adopt mixed lubrication, i.e. gasoline and engine oil are mixed according to a certain proportion and then stored in an oil tank for the gasoline engine to use, and the mixed oil enters a crankcase lubricating moving part after being atomized by a carburetor and enters a combustion chamber to participate in combustion. The structure of the two-stroke gasoline engine determines that the gasoline engine can be inclined or inverted randomly without influencing the operation of the gasoline engine. The structural advantage of the small two-stroke gasoline engine enables the small two-stroke gasoline engine to be widely applied to the fields of garden machinery, plant protection machinery, small agricultural machinery and the like, because the gasoline engine is required to be inclined or inverted to work arbitrarily in the fields.
The two-stroke gasoline engine is mainly used as the power matched with garden machinery, plant protection machinery, small agricultural machinery and other fields, and the machines are basically used in families. This requires a light weight and a compact construction.
At present, a small-sized four-stroke gasoline engine with small volume and light weight is lacking, and the four-stroke gasoline engine can run for a long time in a state of being inverted by 90 degrees or being turned by 180 degrees in the using process.
Disclosure of Invention
The utility model aims at providing a four-stroke gasoline engine to solve and lack a small-size four-stroke gasoline engine of small among the prior art, light in weight can invert the problem of the four-stroke gasoline engine of the long-time operation under the state of 90 degrees or upset 180 degrees in the use.
The utility model discloses a realize through following technical scheme:
a four-stroke gasoline engine comprises a cylinder body, a piston combination, a fuel tank, a cooling system, a gas distribution mechanism, a crankcase and a carburetor, wherein the piston combination is fixed on the cylinder body, and the cylinder body is provided with an inlet valve, a flow guide hole and an exhaust valve; the piston assembly is connected with the crankshaft, a magneto rotor is fixed at one end of the crankshaft, a magneto stator is arranged on the cylinder body and connected with a high-voltage wire, and the tail end of the high-voltage wire is connected with a spark plug; the cooling system comprises fan blades, a starter, a cylinder body shield and cooling blades on a cylinder body, wherein the fan blades are connected with a magneto rotor; the crankcase is provided with a reed valve and is connected with the cylinder body, and the crankcase is provided with a connecting hole which is connected with the vent hole of the cam chamber; the carburetor is connected with the cylinder body through the air inlet pipe, and the cylinder body is connected with the silencer; the valve timing mechanism comprises a timing gear, a cam gear, a lower rocker arm, a tappet and an upper rocker arm, wherein the timing gear is fixed on the crankshaft and is meshed with the cam gear.
Furthermore, the reed valve and a channel which is arranged on the crankcase and is connected with the cam chamber are positioned in the same chamber.
Further, the cam chamber vent hole is positioned on the left side of the axis, and the timing gear and the cam gear form a pressurizing mechanism when rotating.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses for the pollutant greatly reduced of two-stroke gasoline engine, do not have independent machine oil lubrication mechanism, so can invert 90 degrees or overturn long-time operation under the state of 180 degrees, it can provide power for portable or hand-held type garden machine, plant protection machinery, little agricultural machinery etc..
2. The utility model discloses do not have machine oil storage devices such as oil pan, weight ratio tradition is small-size four towards the light 20% of engine, convenient to use and transportation.
Drawings
FIG. 1 is a schematic structural diagram I of the present invention;
FIG. 2 is a schematic structural diagram II of the present invention;
fig. 3 is a schematic structural diagram iii of the present invention.
In the figure: 2. a magneto rotor; 3. a magneto stator; 4. a spark plug; 5. an intake valve; 6. an upper rocker arm; 7. a cylinder block shroud; 9. a flow guide hole; 10. a piston assembly; 11. a tappet; 12. a cylinder body; 13. a cam gear; 14. a crankshaft; 15. a timing gear; 16. a starter; 17. a tank vent; 18. a vent hole gasket; 19. a reed valve; 21. a crankcase; 22. a carburetor; 23. an air inlet pipe; 24. a muffler; 25. a fuel tank; 26. a cam chamber vent hole; 27. an exhaust valve; 28. an air intake passage; 29. a crankshaft chamber; 30. a cylinder head chamber.
Detailed Description
The invention will be further described and illustrated with reference to the accompanying drawings.
Embodiment 1, a four-stroke gasoline engine, including cylinder block 12, piston combination 10, fuel tank 25, cooling system, valve train, crankcase 21 and carburetor 22, the piston combination 10 is fixed on cylinder block 12, there are intake valve 5, diversion hole 9 and exhaust valve 27 on the said cylinder block 12; the piston assembly 10 is connected with a crankshaft 14, a magneto rotor 2 is fixed at one end of the crankshaft 14, a magneto stator 3 is arranged on a cylinder body 12, the magneto stator 3 is connected with a high-voltage wire, and the tail end of the high-voltage wire is connected with a spark plug 4; the cooling system comprises fan blades, a starter 16, a cylinder protective cover 7 and cooling blades on a cylinder 12, wherein the fan blades are connected with a magneto rotor 2; the crankcase 21 is provided with a reed valve 19, the crankcase 21 is connected with the cylinder body 12, and the crankcase 21 is provided with a connecting hole connected with a cam chamber vent hole 26; the carburetor 22 is connected with the cylinder body 12 through an air inlet pipe 23, and the cylinder body 12 is connected with a silencer 24; the valve timing mechanism comprises a timing gear 15 fixed on a crankshaft 14, a cam gear 13, a lower rocker arm, a tappet 11 and an upper rocker arm 6, wherein the timing gear 15 is meshed with the cam gear 13.
The piston combination 10 is connected with a crankshaft 14, and the crankshaft 14 can freely rotate relative to the center of a crankcase 21; an intake valve 5 provided in the cylinder 12 for opening and closing an intake port, and an exhaust valve 27 provided in the cylinder 12 for opening and closing an exhaust port; the carburetor 22 is connected to an intake port of the cylinder block 12 through an intake pipe 23, and the muffler 24 is connected to an exhaust port of the cylinder block 12. The lower part of the crankcase 21 is fixed with a fuel tank 25 by screws, and the fuel tank 25 is connected with the carburetor 22 through an oil inlet pipe and an oil return pipe; torque on the crankshaft 14 is transmitted to the intake valve 5 and the exhaust valve 27 via the timing gear 15, the rocker arm, the tappet 11, the upper rocker arm 6, and the like, and opens and closes the intake port and the exhaust port of the cylinder 12; the reed valve 19 controls the opening and closing of the box vent hole 17; the upper part of the crankcase 21 is connected to the cylinder block 12. When the piston assembly 10 moves towards the combustion chamber, negative pressure is formed in the crank chamber 29, the air inlet channel 28 on the cylinder body 12 opens the mixed gas of gasoline and engine oil to enter the crank chamber 29, when the piston assembly 10 moves downwards, the mixed gas of the fuel in the crank chamber 29 is compressed to enter the cam chamber through the vent hole sealing gasket 18, the reed valve 19 and the box vent hole 17 through the rotation pressurization of the timing gear 15 and the cam gear 13. Through the bore in the tappet 11 into the cylinder head chamber 30, lubricates the upper rocker arm 6 and finally through the pilot bore 9 into the combustion chamber. The utility model discloses do not have independent machine oil lubrication, consequently no matter the gasoline engine invert 90 degrees or overturn 180 degrees and can both run normally to do not have machine oil storage devices such as oil pan, weight ratio tradition is small-size four towards the light 20% of engine.
Claims (3)
1. The utility model provides a four-stroke gasoline engine, includes cylinder body (12), piston combination (10), fuel tank (25), cooling system, air distribution mechanism, crankcase (21) and carburetor (22), and piston combination (10) are fixed on cylinder body (12), its characterized in that: the cylinder body (12) is provided with an inlet valve (5), a diversion hole (9) and an exhaust valve (27); the piston assembly (10) is connected with a crankshaft (14), one end of the crankshaft (14) is fixed with a magneto rotor (2), a magneto stator (3) is arranged on a cylinder body (12), the magneto stator (3) is connected with a high-voltage wire, and the tail end of the high-voltage wire is connected with a spark plug (4); the cooling system comprises fan blades, a starter (16), a cylinder body shield (7) and cooling blades on a cylinder body (12), wherein the fan blades are connected with a magneto rotor (2); the crankcase (21) is provided with a reed valve (19), the crankcase (21) is connected with the cylinder body (12), and the crankcase (21) is provided with a connecting hole connected with a cam chamber vent hole (26); the carburetor (22) is connected with the cylinder body (12) through an air inlet pipe (23), and the cylinder body (12) is connected with the silencer (24); the valve timing mechanism comprises a timing gear (15) fixed on a crankshaft (14), a cam gear (13), a lower rocker arm, a tappet (11) and an upper rocker arm (6), wherein the timing gear (15) is meshed with the cam gear (13).
2. The four-stroke gasoline engine of claim 1 wherein: the reed valve (19) and a channel which is connected with the cam chamber on the crankcase (21) are positioned in the same chamber.
3. The four-stroke gasoline engine of claim 1 wherein: the cam chamber vent hole (26) is positioned on the left side of the axis, and the timing gear (15) and the cam gear (13) form a pressurizing mechanism when rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104179.6U CN210799134U (en) | 2019-11-29 | 2019-11-29 | Four-stroke gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104179.6U CN210799134U (en) | 2019-11-29 | 2019-11-29 | Four-stroke gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210799134U true CN210799134U (en) | 2020-06-19 |
Family
ID=71243128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922104179.6U Active CN210799134U (en) | 2019-11-29 | 2019-11-29 | Four-stroke gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210799134U (en) |
-
2019
- 2019-11-29 CN CN201922104179.6U patent/CN210799134U/en active Active
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