CN219910974U - Direct-connection two-stroke engine - Google Patents
Direct-connection two-stroke engine Download PDFInfo
- Publication number
- CN219910974U CN219910974U CN202321278235.8U CN202321278235U CN219910974U CN 219910974 U CN219910974 U CN 219910974U CN 202321278235 U CN202321278235 U CN 202321278235U CN 219910974 U CN219910974 U CN 219910974U
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- Prior art keywords
- crankcase
- cylinder body
- scavenging
- direct
- stroke engine
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- 230000002000 scavenging effect Effects 0.000 claims abstract description 79
- 230000000670 limiting effect Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 239000000446 fuel Substances 0.000 abstract description 5
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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Abstract
The utility model relates to a direct-connection two-stroke engine, which comprises a cylinder body and a crankcase, wherein the crankcase is connected to the lower end of the cylinder body, a crankshaft is arranged in the crankcase, a piston is arranged in a cylinder hole of the cylinder body, the crankshaft and the piston are in transmission connection through a connecting rod, an air inlet, an air outlet and opposite scavenging passages are arranged on the cylinder body, the inlet of each scavenging passage is arranged on the end face of the cylinder body, which faces the crankcase, the crankcase is an integral box body which faces the opening of the cylinder body, one end of the cylinder body, which faces the crankcase, is provided with an upper half crankcase integrally formed with the cylinder body, the crankcase is a semicircular crankcase matched with the upper half crankcase, and the upper half crankcase is provided with a flow limiting structure communicated with the inlet of the scavenging passage, and the direct-connection two-stroke engine has the advantages that: through setting up the restriction structure and promoting scavenging duct air inlet pressure for scavenging effect is better, makes fuel combustion more abundant, reduces the oil consumption of engine.
Description
Technical Field
The utility model relates to the field of two-stroke engines, in particular to a direct-connection two-stroke engine.
Background
A two-stroke (or two-stroke cycle) engine is an internal combustion engine that completes a power cycle by two strokes (up-and-down movements) of a piston during a power cycle, and hand-held tools such as a brush cutter, hedge shears, chain saws, etc. all use the two-stroke engine as a power source;
the two-stroke engine of the type disclosed in the patent number CN 215057781U is a stratified charge passage mechanism, in which the air in the carburetor can be led into the crankcase in one direction through the central shaft of the crankshaft by rotating the crankshaft, the air is led into the upper part of the crankcase chamber through the air inlet, when the piston moves down, the air in the crankcase enters the cylinder through the scavenging passage to scavenge the exhaust gas, and the air above the crankcase enters the combustion chamber of the cylinder to burn, thus the cycle is completed;
however, in the prior art, because the structure design of the scavenging passage is unreasonable, a large amount of waste gas is not scavenged during scavenging, so that more waste gas is still contained in the combustion chamber during combustion, the fuel is insufficiently combusted, and then the fuel consumption is increased due to phase change, which is not beneficial to energy conservation.
Disclosure of Invention
The technical problem to be solved by the present utility model is to address the above-mentioned shortcomings of the prior art,
a direct-coupled two-stroke engine is provided.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a two-stroke engine of direct-connected, includes cylinder body, crankcase, the crankcase is connected in the lower extreme of cylinder body, is equipped with the bent axle in the crankcase, is equipped with the piston in the jar hole of cylinder body, is connected through the connecting rod transmission between bent axle and the piston, is equipped with air inlet, gas outlet and the scavenging path of relative setting on the cylinder body, and the import setting of each scavenging path is on the terminal surface of cylinder body towards the crankcase, its characterized in that: the crankcase is towards cylinder body open-ended integral type box, and cylinder body is equipped with the first half crankcase with cylinder body integrated into one piece towards crankcase one end, the crankcase be with the semicircle crankcase of first half crankcase adaptation, first half crankcase be equipped with the restriction structure of scavenging path import intercommunication.
According to the technical scheme, in the prior art, the crankcase of the two-stroke engine is arranged in a half way with the cylinder body, only the half crankcase and the crankcase body are required to be directly assembled when the engine is assembled with the cylinder body, the engine is more convenient and faster, the scavenging passage of the engine cylinder body is an open type channel which is arranged on the cylinder body and is directly communicated with the inside of the cylinder body, so that air is dispersed when entering the scavenging passage due to the arrangement, and the scavenging effect is poor.
The direct-coupled two-stroke engine may be further configured to: the flow limiting structure comprises a flow limiting inlet which is arranged on the inner wall of the upper half crankcase and communicated with the scavenging passage, and a separation baffle which divides the flow limiting inlet into two parts is arranged on the inner wall of the upper half crankcase.
By adopting the technical scheme, through setting up the restriction inlet in the first crankcase, this restriction inlet and scavenging path intercommunication for in the air gets into scavenging path through the restriction inlet, play the restriction effect, because air can only get into scavenging path through the restriction inlet when the bent axle moves, improved the air pressure who gets into scavenging path, improved scavenging effect.
The direct-coupled two-stroke engine may be further configured to: the scavenging passage is arranged on the inner wall of the cylinder body in an arc shape, and scavenging separation baffles which divide the scavenging passage into two parts are arranged in the scavenging passage.
By adopting the technical scheme, the flow-limiting inlet is divided into two halves, so that the pressure is higher when air enters, and the flow-limiting effect is improved.
The direct-coupled two-stroke engine may be further configured to: the cylinder body outer wall is arranged at the corresponding position of the scavenging passage in an opening way, and a sealing baffle is connected to the opening part.
By adopting the technical scheme, the scavenging passage comprises the scavenging inlet, the scavenging passage and the scavenging outlet, the scavenging inlet, the scavenging passage and the scavenging outlet are divided into two parts under the action of the scavenging separation baffle, and air enters into the two adjacent passages simultaneously for scavenging under the action of the scavenging separation baffle during scavenging, so that the intake pressure is increased by the scavenging passage divided into two parts, and the scavenging effect is further enhanced.
The beneficial effects of the utility model are as follows: through setting up the restriction structure and promoting scavenging duct air inlet pressure for scavenging effect is better, makes fuel combustion more abundant, reduces the oil consumption of engine.
The utility model is described in further detail below with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic diagram of the structure of an embodiment of the present utility model 1;
FIG. 2 is an exploded view of an embodiment of the present utility model;
FIG. 3 is a rear view of an embodiment of the present utility model;
FIG. 4 is a schematic view of the cross-sectional structure of the portion A-A of FIG. 3;
FIG. 5 is a schematic perspective view of a cylinder 1 according to an embodiment of the present utility model;
fig. 6 is a schematic perspective view of a cylinder body according to the present embodiment.
Detailed Description
The direct-connection two-stroke engine shown in fig. 1 to 6 comprises a cylinder body 1 and a crank case 2, wherein the crank case 2 is connected to the lower end of the cylinder body 1, a crank shaft (not shown in the figure) is arranged in the crank case 2, a piston is arranged in a cylinder hole of the cylinder body 1, the crank shaft 3 is in transmission connection with the piston through a connecting rod, an air inlet 11, an air outlet 12 and oppositely arranged scavenging ducts 13 are arranged on the cylinder body 1, the inlet of each scavenging duct 13 is arranged on the end face of the cylinder body 1, which faces the crank case 2, the crank case 2 is an integral box body which faces the opening of the cylinder body 1, one end of the cylinder body 1, which faces the crank case 2, is provided with an upper half crank case 14 which is integrally formed with the cylinder body 1, the crank case 2 is a semicircular crank case which is matched with the upper half crank case 14, and the upper half crank case 14 is provided with a flow limiting structure which is communicated with the inlet of the scavenging ducts 13;
in the prior art, a crank case of the two-stroke engine is arranged in a way of integrating a half of the crank case with a cylinder body, the crank case and the crank case body are only required to be directly assembled when the crank case is assembled with the cylinder body, the crank case is more convenient to use, the scavenging passage of the engine cylinder body is an open-type passage arranged on the cylinder body, the passage is directly communicated with the inside of the cylinder body, so that the pressure of air is dispersed when entering the scavenging passage due to the arrangement, and the scavenging effect is poor.
The flow limiting structure comprises a flow limiting inlet 15 which is arranged on the inner wall of the upper half crankcase 14 and communicated with the scavenging passage 13, and a separation baffle 16 which divides the flow limiting inlet 15 into two parts is arranged on the inner wall of the upper half crankcase 14;
the flow limiting inlet is arranged in the upper half crankcase and is communicated with the scavenging passage, so that air enters the scavenging passage through the flow limiting inlet, and a flow limiting effect is achieved;
the scavenging passage 13 is arranged on the inner wall of the cylinder body 1 in an arc shape, and a scavenging separation baffle 17 for dividing the scavenging passage 13 into two parts is arranged in the scavenging passage 13;
the flow-limiting inlet is divided into two halves, so that the pressure is higher when air enters, and the flow-limiting effect is improved;
the outer wall of the cylinder body 1 is provided with an opening at a position corresponding to the scavenging passage 13, and the opening is connected with a sealing baffle 4;
the scavenging passage comprises a scavenging inlet, a scavenging passage and a scavenging outlet, the scavenging inlet, the scavenging passage and the scavenging outlet are divided into two parts under the action of the scavenging separation baffle, and air enters into the two adjacent passages for scavenging under the action of the scavenging separation baffle during scavenging, so that the scavenging pressure is increased by the scavenging passage divided into two parts, and the scavenging effect is further enhanced.
The beneficial effects of the utility model are as follows: through setting up the restriction structure and promoting scavenging duct air inlet pressure for scavenging effect is better, makes fuel combustion more abundant, reduces the oil consumption of engine.
Claims (4)
1. The utility model provides a two-stroke engine of direct-connected, includes cylinder body, crankcase, the crankcase is connected in the lower extreme of cylinder body, is equipped with the bent axle in the crankcase, is equipped with the piston in the jar hole of cylinder body, is connected through the connecting rod transmission between bent axle and the piston, is equipped with air inlet, gas outlet and the scavenging path of relative setting on the cylinder body, and the import setting of each scavenging path is on the terminal surface of cylinder body towards the crankcase, its characterized in that: the crankcase is towards cylinder body open-ended integral type box, and cylinder body is equipped with the first half crankcase with cylinder body integrated into one piece towards crankcase one end, the crankcase be with the semicircle crankcase of first half crankcase adaptation, first half crankcase be equipped with the restriction structure of scavenging path import intercommunication.
2. A direct-coupled two-stroke engine as claimed in claim 1 wherein: the flow limiting structure comprises a flow limiting inlet which is arranged on the inner wall of the upper half crankcase and communicated with the scavenging passage, and a separation baffle which divides the flow limiting inlet into two parts is arranged on the inner wall of the working crankcase.
3. A direct-coupled two-stroke engine as claimed in claim 2, wherein: the scavenging passage is arranged on the inner wall of the cylinder body in an arc shape, and scavenging separation baffles which divide the scavenging passage into two parts are arranged in the scavenging passage.
4. A direct-coupled two-stroke engine according to claim 3, wherein: the cylinder body outer wall is arranged at the corresponding position of the scavenging passage in an opening way, and a sealing baffle is connected to the opening part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321278235.8U CN219910974U (en) | 2023-05-23 | 2023-05-23 | Direct-connection two-stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321278235.8U CN219910974U (en) | 2023-05-23 | 2023-05-23 | Direct-connection two-stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219910974U true CN219910974U (en) | 2023-10-27 |
Family
ID=88433942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321278235.8U Active CN219910974U (en) | 2023-05-23 | 2023-05-23 | Direct-connection two-stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219910974U (en) |
-
2023
- 2023-05-23 CN CN202321278235.8U patent/CN219910974U/en active Active
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