CN202659300U - Small four-stroke gasoline engine - Google Patents
Small four-stroke gasoline engine Download PDFInfo
- Publication number
- CN202659300U CN202659300U CN 201220372357 CN201220372357U CN202659300U CN 202659300 U CN202659300 U CN 202659300U CN 201220372357 CN201220372357 CN 201220372357 CN 201220372357 U CN201220372357 U CN 201220372357U CN 202659300 U CN202659300 U CN 202659300U
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- CN
- China
- Prior art keywords
- oil
- gasoline engine
- crankcase
- crankshaft
- stroke gasoline
- Prior art date
- 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.)
- Expired - Fee Related
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- Lubrication Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a small four-stroke gasoline engine, and relates to the technical field of internal-combustion engines. The gasoline engine comprises a cylinder body, a piston assembly, a combustion chamber, a crankshaft and a crankshaft box. The gasoline engine is characterized in that the upper part of the crankshaft box is connected with the cylinder body; the crankshaft is provided with a crankshaft oil passage hole; the crankshaft box is provided with a crankshaft box oil passage hole; the crankshaft box oil passage hole is connected with the upper part of an engine oil hose; and the lower part of the engine oil hose is soaked into lubricating oil in a lubricating oil chamber formed by an oil bottom shell, the crankshaft box and an engine oil ruler cover. Compared with a two-stroke gasoline engine, the small four-stroke gasoline engine has the advantage that pollutants are greatly reduced; and the small four-stroke gasoline engine also has the advantages of light weight and convenience in carrying and transportation, can run for long time in inverted and inclined states and can be widely applied to small agricultural machinery, garden machinery and the like.
Description
Technical field
The utility model relates to technical field of internal combustion engines, is specifically related to a kind of mini four-stroke gasoline engine.
Background technique
At the fields such as graden machine, equipment for plant protection, peasant's machine, mostly supporting small two stroke gasoline.Four-stroke gasoline engine has obvious superiority than two-stroke gasoline engine aspect discharging, the effulent of four-stroke gasoline engine NOx, CO and HC obviously reduces with respect to two-stroke gasoline engine.Therefore, when four-stroke gasoline engine is applied to graden machine, equipment for plant protection, peasant's machine, have the discharging of obvious reduction pollutant, have great significance to preventing atmospheric pollution.
At present, small two stroke gasoline is at field dominates such as graden machine, equipment for plant protection, peasant's machines, and mainly the reason by following two aspects is determined:
1, traditional small two stroke gasoline adopts Mixed lubrication, be to be stored in after gasoline and machine oil mix by a certain percentage to supply with the petrol engine use in the fuel tank, miscella enters the crankcase lubrication moving element and enters into the firing chamber and participates in burning after the Carburetor atomizing.This of two-stroke gasoline engine kind of structures shape petrol engine can tilt arbitrarily or be inverted, and do not affect its operation.This of small two stroke gasoline kind of structural advantage makes it be used widely in fields such as graden machine, equipment for plant protection, peasant's machines.
2, small two stroke gasoline is mostly as supporting power in field such as graden machine, equipment for plant protection, peasant's machines, and these facility substantially all are that family uses.This just requires must be lightweight, compact structure.
At present, the mini four-stroke gasoline engine volume on the market is large, weight is large, and especially lubrication system adopts splash lubrication mostly, this just so that this type of petrol engine can not be under the state of being inverted and tilting long-play.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of volume little, lightweight, can be under the state of being inverted and tilting long playing mini four-stroke gasoline engine.
The utility model mini four-stroke gasoline engine comprises cylinder body, piston in combination, firing chamber, bent axle, crankcase, described crankcase top is connected with cylinder body, described bent axle is provided with crankshaft oil hole, described crankcase is provided with crankcase oil duct hole, described crankcase oil duct hole is connected with the top of a machine oil flexible pipe, and the bottom of described machine oil flexible pipe is immersed in the lubricant oil in the oil chamber that is made of oil sump, crankcase, oil rule lid.
Described bent axle one end is flywheel fixedly, and described flywheel is provided with tightening piece.
Compared with prior art, the beneficial effects of the utility model are: the pollutant with respect to two-stroke gasoline engine reduces greatly, also have lightweight, the characteristics of the transportation that is easy to carry, and the lubrication system of its uniqueness can be under the state of being inverted and tilting long-play.It can provide power for the graden machine of packaged type or hand-held, equipment for plant protection, peasant's machine etc.
Description of drawings
Fig. 1 is that the utility model mini four-stroke gasoline engine is along the sectional drawing of bent axle center of rotation and cylinder centerline;
Fig. 2 is that mini four-stroke gasoline engine shown in Figure 1 is along the sectional drawing of intake duct and cylinder centerline;
Fig. 3 is that mini four-stroke gasoline engine shown in Figure 1 is along the sectional drawing of bent axle and cylinder centerline.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
Such as Fig. 1, Fig. 2, shown in Figure 3, among the figure: 1, cylinder body, 2, piston in combination, 3, intake valve, 4, spark plug, 5, connecting rod, 6, bent axle, 7, crankshaft oil hole, 8, crankcase, 9, crankcase oil duct hole, 10, the machine oil flexible pipe, 11, oil sump, 12, oil rule, 13, fuel tank, 14, flywheel, 15, spark coil, 16, high voltage wire, 17, cavity cap, 18, fan guard, 19, the cylinder body guard shield, 20, exhaust valve, 21, diaphragm carburetor, 22, suction tude, 23, silencing apparatus, 24, oil inlet pipe, 25, return tube, 26, output shaft, 27, rolling bearing, 28, tightening piece, 29, timing gear, 30, cam wheel, 31, lower shake-changing arm, 32, tappet, 33, upper rocker arm.
It comprises cylinder body, piston in combination, firing chamber, bent axle, crankcase, crankcase top is connected with cylinder body, described bent axle is provided with crankshaft oil hole, described crankcase is provided with crankcase oil duct hole, described crankcase oil duct hole is connected with the top of a machine oil flexible pipe, and the bottom of described machine oil flexible pipe is immersed in the lubricant oil in the oil chamber that is made of oil sump, crankcase, oil rule lid.
Described bent axle one end is flywheel fixedly, and described flywheel is provided with tightening piece.Described crankcase pit bottom section is fixed with fuel tank, and fuel tank is connected by oil inlet pipe, return tube with diaphragm carburetor.Be furnished with magnet on the described flywheel, spark coil is fixed on the cylinder body, and spark coil is connected with high voltage wire, and the end of high voltage wire is fixed with cavity cap, and cavity cap is connected with spark plug, has consisted of the mini four-stroke gasoline engine ignition system.Described flywheel bottom is provided with fan blade, and fan guard is fixed on cylinder body, and the cylinder body guard shield covers on the petrol engine, and fan blade, fan guard, cylinder body guard shield and the cooled blade above the cylinder body have consisted of the cooling system of mini four-stroke gasoline engine.Described intake valve is located at the cylinder body suction port and is opened and closed, and exhaust valve is located at the cylinder body relief opening and is opened and closed.Described diaphragm carburetor is connected with the cylinder body suction port by suction tude, and silencing apparatus is connected with the cylinder body relief opening.Described output shaft is fixed on the flywheel, and rolling bearing is assemblied on the fan guard, and rolling bearing is played a supporting role to output shaft.Described distribution device comprises the timing gear that are fixed on the bent axle, the cam wheel that is engaged with, lower shake-changing arm, tappet, upper rocker arm.
Piston in combination is connected with bent axle by connecting rod, and bent axle can be done free rotation with respect to the crankcase center; Crankcase top is connected with cylinder body; Bent axle is provided with crankshaft oil hole; Crankcase is provided with crankcase oil duct hole, and the machine oil flexible pipe is connected with oil channel hole; Oil sump, crankcase, oil rule consist of an engine oil chamber that stores lubricant oil, and the bottom of machine oil flexible pipe is immersed in the interior lubricant oil of engine oil chamber; Crankcase pit bottom section is fixed with fuel tank, and fuel tank is connected by oil inlet pipe, return tube with diaphragm carburetor.
Crankshaft oil hole lubricant oil when crankcase oil duct hole on the crankcase overlaps passed through machine oil flexible pipe, crankcase oil duct hole, crankshaft oil hole by in the suction of the negative pressure in the crankcase crankcase from engine oil chamber when bent axle rotated, and played the effect of lubricating movement part.
Claims (2)
1. mini four-stroke gasoline engine, comprise cylinder body, piston in combination, firing chamber, bent axle, crankcase, it is characterized in that: described crankcase top is connected with cylinder body, described bent axle is provided with crankshaft oil hole, described crankcase is provided with crankcase oil duct hole, described crankcase oil duct hole is connected with the top of a machine oil flexible pipe, and the bottom of described machine oil flexible pipe is immersed in the lubricant oil in the oil chamber that is made of oil sump, crankcase, oil rule lid.
2. mini four-stroke gasoline engine according to claim 1, it is characterized in that: described bent axle one end is flywheel fixedly, and described flywheel is provided with tightening piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372357 CN202659300U (en) | 2012-07-30 | 2012-07-30 | Small four-stroke gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372357 CN202659300U (en) | 2012-07-30 | 2012-07-30 | Small four-stroke gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659300U true CN202659300U (en) | 2013-01-09 |
Family
ID=47454209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220372357 Expired - Fee Related CN202659300U (en) | 2012-07-30 | 2012-07-30 | Small four-stroke gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202659300U (en) |
-
2012
- 2012-07-30 CN CN 201220372357 patent/CN202659300U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20150730 |
|
| EXPY | Termination of patent right or utility model |