CN208564760U - Crankshaft overhead two stroke engine - Google Patents
Crankshaft overhead two stroke engine Download PDFInfo
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- CN208564760U CN208564760U CN201821044608.4U CN201821044608U CN208564760U CN 208564760 U CN208564760 U CN 208564760U CN 201821044608 U CN201821044608 U CN 201821044608U CN 208564760 U CN208564760 U CN 208564760U
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- oil
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- scavenging
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Abstract
The utility model discloses a kind of crankshaft overhead two stroke engines, it is related to technical field of engines, lubricating oil and fuel oil mixed mode of operation are used for existing two stroke engine, it is bad to cause engine lubrication, fuel consumption is big, it is small to pollute larger and scavenging pressure, the problems such as scavenging is not clean, using offering oil duct in piston, piston outer periphery wall offers closure gasket groove, closure gasket groove can be connected to oil duct, the scheme of sealing ring is detachably provided in closure gasket groove, by offering the oil duct that can be connected with closure gasket groove in piston, piston can obtain lubricating oil when running from oil duct, therefore it is bad because lubricating caused by using lubricating oil and fuel oil hybrid mode to efficiently solve the prior art, fuel consumption is big, pollute larger problem.
Description
Technical field
The utility model relates to technical field of engines, in particular to a kind of crankshaft overhead two stroke engine.
Background technique
In piston engine, two stroke engine structure is simple, and ride comfort is good, and power ratio is higher than four-stroke engine,
But since the lubricating system of two stroke engine mainly realizes that this has resulted in two by the way of lubricating oil and fuel oil mixing
Stroke Engine lubrication is bad, and fuel consumption is big, pollutes larger problem.This is also that two stroke engine is sent out relative to four strokes
The problem of motivation cannot be widely applied.
Since traditional two stroke engine crankshaft is arranged in cylinder bottom, and it is effective without space and position
The lubricating structure of piston, therefore the problem of the lubrication of two stroke engine piston and cooling always industry is arranged in ground.In addition, two
The scavenging of Stroke Engine is realized by way of crankcase air inlet precompressed air, and engine blow-through air pressure is also resulted in
Small, scavenging is not clean, the complicated problem of Multi-cylinder engine crankcase sealing.
Utility model content
To solve the above problems, two stroke engine provided by the utility model is arranged crankshaft in cylinder head, and
Scavenging cylinder is arranged in cylinder bottom, and grease conduits mechanism is arranged in the position of former crankcase.It will be lubricated by lubricating oil pump pressure
Oil is transported to the conduit, forces to lubricate piston and cylinder to fuel feeding at internal piston and oil ring and can take away a part
Heat reduces the temperature of piston, and it is small and need lubricating oil and fuel oil to mix to realize to solve two stroke engine scavenging pressure
Heavy-polluted problem that lubricant burning leads to that energy consumption is high, improved scheme can significantly improve engine efficiency, and extension is started
Machine service life reduces pollution of the discharge to environment.
The utility model belongs to row reciprocating piston engine (using uniflow scavenging, in-cylinder direct-jet mode), and crankshaft setting exists
Cylinder head, exhaust valve setting are arranged in cylinder head, scavenging door and inlet valve in cylinder lower part, and cylinder bottom is provided with sealing
The features such as next door has scavenging pressure big, and scavenging is clean.
The utility model adopts the following technical solution realizes:
A kind of crankshaft overhead two stroke engine, including crank mechanism, cylinder are slidably provided in the cylinder
Piston offers oil duct in the piston；
The piston outer periphery wall offers closure gasket groove, and closure gasket groove can be connected to oil duct；
Sealing ring is detachably provided in the closure gasket groove.
By offering the oil duct that can be connected with closure gasket groove in piston, piston can be from oil duct when running
Lubricating oil is obtained, therefore efficiently solves the prior art because lubricating bad, fuel oil caused by using lubricating oil and fuel oil hybrid mode
The problem that consumption is big, pollution is larger.
Preferably, the cylinder head offers exhaust outlet, movable in exhaust outlet to be provided with exhaust valve；
The bottom of the cylinder is further fixedly arranged on scavenging cylinder, and the internal cavities of both cylinder and scavenging cylinder are interconnected；
It is fixedly installed piston slideway in the scavenging cylinder, the inner cavity of the piston slideway and the cylinder matches pair
Answer, piston can along cylinder inner cavity slide downward and slide into the piston slideway；
Scavenging channel is set between the piston slideway and the scavenging cylinder upper and lower ends；
The side of the scavenging cylinder offers air inlet, is fixedly installed breather cheek valve in air inlet.
Exhaust outlet is offered in cylinder head, is further fixedly arranged on scavenging cylinder in the bottom of the cylinder, by air inlet and is gone out
Gas separation, can be avoided existing two stroke engine and realizes scavenging by way of crankcase air inlet precompressed air, cause to sweep
Atmospheric pressure is small, and scavenging is not clean, the complicated problem of Multi-cylinder engine crankcase sealing.
Preferably, the bottom of the piston is fixedly connected with connecting rod, and the connecting rod is inverted " t " character form structure.
Preferably, the connecting rod includes sliding sleeve and link arm, and the link arm is symmetrically fixed at the sliding
Casing one end；
The sliding sleeve upper end is fixedly connected with the bottom of the piston, and the link arm is turned by outside connecting rod and crankshaft
Dynamic connection.
Preferably, it is equipped with grease conduits in the sliding sleeve, offers oil inlet pipe in the grease conduits
And oil outlet pipe, the oil inlet pipe and oil outlet pipe are connected with the oil duct；
Described grease conduits one end is respectively arranged with oil fuel tube and oil exit pipe, and the oil fuel tube and the oil inlet pipe connect
Logical, the oil exit pipe is connected to the oil outlet pipe；
One end of the oil fuel tube is connect with oil pump.
Lubricating oil indentation cylinder is realized into the lubrication to piston using grease conduits, and is taken away by the discharge of lubricating oil
A part of heat not only reduces the maintenance period of engine, moreover it is possible to considerably increase the service life of engine.
Preferably, the cylinder head is further fixedly arranged on fuel injector and spark plug.
Preferably, cam, the top of the exhaust valve and cam are fixedly installed on the crankshaft of the crank mechanism
It is slidably connected, drives exhaust valve to realize the operation opened or closed to exhaust outlet by the rotation of cam.
Preferably, the scavenging channel includes upper scavenging channel and lower scavenging channel.
Preferably, the cylinder bottom of sweeping offers connecting rod movable span, the movable company of being equipped in the connecting rod movable span
Bar.
Preferably, the sealing ring includes first gas ring, oil ring, second gas ring, the oil ring be set to first gas ring and
Between second gas ring, the closure gasket groove of oil ring is connected to oil duct.
The beneficial effects of the utility model include:
Clever structure, rationally, high-efficient, stability is good for design, can significantly improve engine efficiency, and extending engine makes
With the service life, pollution of the discharge to environment is reduced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of a piston-cylinder unit in embodiment provided by the utility model；
Fig. 2 is the cross-sectional view of Fig. 1；
Fig. 3 is the axis sectional view of Fig. 1；
Fig. 4 is the partial enlarged view of Fig. 3；
Fig. 5 is status diagram when piston is moved to cylinder head.
In figure, each label is respectively indicated: crank mechanism 1, outside connecting rod 2, connecting rod 3, piston 4, cylinder 5, scavenging cylinder
6, grease conduits 7, oil pump 8, exhaust valve 9, cam 10, oil duct 40, first gas ring 41, oil ring 42, second gas ring 43, exhaust outlet
50, fuel injector 51, spark plug 52, piston slideway 60, scavenging pressure room 61, air inlet 62, breather cheek valve 63, upper scavenging channel
64, lower scavenging channel 65, oil inlet pipe 70, oil outlet pipe 71, oil fuel tube 72, oil exit pipe 73.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, implement below in conjunction with the utility model
Fig. 1 ~ 5 in example, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described reality
Applying example is the utility model a part of the embodiment, instead of all the embodiments.Usually it is described and illustrated herein in the accompanying drawings
The detailed description of the embodiments of the present invention is not intended to limit the range of claimed invention, but only table
Show the selected embodiment of the utility model.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, fall within the protection scope of the utility model.
As shown in Figs. 1-5, a kind of crankshaft overhead two stroke engine, including crank mechanism 1, cylinder 5, transmission of crankshaft
Mechanism 1 is located at the top of cylinder 5, and crank mechanism 1 is connect by outside connecting rod 2, connecting rod 3 with piston 4.
Offer exhaust outlet 50 at the top of cylinder 5, it is movable in exhaust outlet 50 to be provided with exhaust valve 9；Crank mechanism 1
Cam 10 is fixedly installed on crankshaft, top and the cam 10 of exhaust valve 9 are slidably connected, and drive exhaust by the rotation of cam 10
9 pairs of exhaust outlets 50 of door realize the operation opened or closed.Fuel injector 51 and spark plug are further fixedly arranged in 9 two sides of exhaust valve
52。
The bottom of cylinder 5 is further fixedly arranged on scavenging cylinder 6, and scavenging cylinder 6 can be round tube knot corresponding with 5 shape of cylinder
The internal cavities of both structure, cylinder 5 and scavenging cylinder 6 are interconnected.Piston slideway 60 is fixedly installed in scavenging cylinder 6, piston is sliding
Road 60 be tubular structure, match with the inner cavity of cylinder 5 corresponding, i.e., piston 4 can along cylinder 5 inner cavity slide downward simultaneously
It slides into piston slideway 60.Scavenging channel is set between 6 upper and lower ends of piston slideway 60 and scavenging cylinder, and scavenging channel includes above sweeping
Gas channel 64 and lower scavenging channel 65.The side of scavenging cylinder 6 offers air inlet 62, be fixedly installed in air inlet 62 unidirectionally into
Air valve 63,6 bottom of scavenging cylinder offer connecting rod movable span, movable in connecting rod movable span to be equipped with connecting rod 3.
It is slidably provided with piston 4 in cylinder 5, oil duct 40 is offered in piston 4,4 periphery wall of piston offers sealing ring
Slot is detachably provided with sealing ring in closure gasket groove, and sealing ring includes first gas ring 41, oil ring 42, second gas ring 43, oil ring 42
It is set between first gas ring 41 and second gas ring 43, the closure gasket groove of oil ring 42 is connected to oil duct 40.The bottom of piston 4 and company
Bar 3 is fixedly connected, and connecting rod 3 is inverted " t " character form structure, and connecting rod 3 includes sliding sleeve 30 and link arm 31, and link arm 31 is symmetrically solid
Fixed to be arranged in 30 one end of sliding sleeve, 30 upper end of sliding sleeve is fixedly connected with the bottom of piston 4, and link arm 31 passes through outside connecting rod
2 connect with crank rotation.It is equipped with grease conduits 7 in sliding sleeve 30,70 He of oil inlet pipe is offered in grease conduits 7
Oil outlet pipe 71, oil inlet pipe 70 and oil outlet pipe 71 are connected with oil duct 40.7 one end of grease conduits is respectively arranged with oiling
Pipe 72 and oil exit pipe 73, oil fuel tube 72 are connected to oil inlet pipe 70, and oil exit pipe 73 is connected to oil outlet pipe 71, and the one of oil fuel tube 72
End is connect with oil pump 8.
When work, it is assumed that the original state of one of piston-cylinder unit is as shown in figure 5, piston 4 is located at 5 upper half of cylinder at this time
In partial work by combustion room, because cam 3 rotate upward so that exhaust valve 9 under the action of acting force of the spring or cam pulling force to
Upper movement simultaneously seals exhaust outlet 50, and then fuel injector 51 sprays into mist of oil in cylinder 5, through 52 ignition of spark plug.Mist of oil
The thrust that moment generates after burning pushes down on piston 4, when piston 4 moves down, passes through two link arms 31 on connecting rod 3
Outside connecting rod 2 is driven to move down, so that also band dynamic crankshaft realizes rotation to outside connecting rod 2.Simultaneously, since piston 4 is downward
Movement, the breather cheek valve 63 of 6 side of scavenging cylinder are closed because pressure increases, and piston 4 is by 5 lower half of cylinder and scavenging pressure
Fresh air in room 61 is compressed, when piston 4 moves down and enters in the piston slideway 60 in scavenging cylinder 6, such as
Shown in Fig. 2, exhaust valve 9 is in an open state at this time, and 6 inner space of scavenging cylinder passes through upper scavenging channel 64 and 5 internal cavities of cylinder
(work by combustion room) connection, fresh air enter 5 internal cavities (work by combustion of cylinder because pressure is acted on from upper scavenging channel 64
Room) in, and the exhaust gas after burning is scanned out from exhaust outlet 50, piston 4 continues to move down, and is pressed further by scavenging pressure room 61
Interior fresh air makes it enter 5 internal cavities of cylinder (work by combustion room) from lower scavenging channel 65, upper scavenging channel 64.?
During piston 4 moves down, since crankshaft band moving cam 10 rotates, cam is pressed downward exhaust valve 9 so that exhaust outlet 50
It is communicated with the atmosphere, after piston 4 is moved to bottommost, since the turning effort of crankshaft moves backward, piston 4 is moved up gas
The exhaust gas that lefts in cylinder 5 is extruded from exhaust outlet 50.Simultaneously because piston 4 moves up, so that scavenging cylinder 6 becomes negative pressure state,
Breather cheek valve 63 automatically turns on, and fresh air is inhaled into the compression scavenging waited in scavenging cylinder 6 next time.When piston 4 to
On when being moved to scavenging channel 64, exhaust outlet 50 is closed, and piston 4 continues to move up the fresh air in compression cylinder 5, then
Secondary oil spout, igniting repeat the acting process.During piston 4 moves, lubricating oil is passed through oil fuel tube 72, oil inlet by oil pump 8
Pipeline 70 is pumped into oil duct 40, and since oil duct 40 is connected to closure gasket groove, the lubricating oil in oil duct 4 passes through closure gasket groove stream
Enter the inner wall of cylinder 5, provides lubrication for piston 4.During oil pump 8 provides lubricating oil, lubricating oil absorbs piston 4 and cylinder
Heat on 5 is discharged from oil outlet pipe 71, oil exit pipe 73, to realize the effect that can be lubricated but also radiate.
The utility model in piston 4 by offering the oil duct 40 that can be connected with closure gasket groove, when piston is run
Lubricating oil can be obtained from oil duct 40, and a part of heat is taken away by the discharge of lubricating oil, not only reduce engine
Maintenance period, moreover it is possible to considerably increase the service life of engine, therefore efficiently solve the prior art because using lubricating oil
It causes to lubricate the problem that bad, fuel consumption is big, pollution is larger with fuel oil hybrid mode.
Claims (10)
1. a kind of crankshaft overhead two stroke engine, including crank mechanism (1), cylinder (5), it is characterised in that:
It is slidably provided with piston (4) in the cylinder (5), offers oil duct (40) in the piston (4)；
Piston (4) periphery wall offers closure gasket groove, and closure gasket groove can be connected to oil duct (40)；
Sealing ring is detachably provided in the closure gasket groove.
2. engine according to claim 1, it is characterised in that:
It is offered exhaust outlet (50) at the top of the cylinder (5), it is movable in exhaust outlet (50) to be provided with exhaust valve (9)；
The bottom of the cylinder (5) is further fixedly arranged on scavenging cylinder (6), the internal cavities phase of cylinder (5) and scavenging cylinder (6) the two
It is intercommunicated；
It is fixedly installed piston slideway (60) in the scavenging cylinder (6), the inner cavity of the piston slideway (60) and the cylinder (5)
Match correspondence, piston (4) can along cylinder (5) inner cavity slide downward and slide into the piston slideway (60)；
Scavenging channel is set between the piston slideway (60) and the scavenging cylinder (6) upper and lower ends；
The side of the scavenging cylinder (6) offers air inlet (62), is fixedly installed breather cheek valve (63) in air inlet (62).
3. engine according to claim 1 or 2, it is characterised in that:
The bottom of the piston (4) is fixedly connected with connecting rod (3), and the connecting rod (3) is inverted " t " character form structure.
4. engine according to claim 3, it is characterised in that:
The connecting rod (3) includes sliding sleeve (30) and link arm (31), and the link arm (31) is symmetrically fixed at described
Sliding sleeve (30) one end；
Sliding sleeve (30) upper end is fixedly connected with the bottom of the piston (4), and the link arm (31) passes through outside connecting rod
(2) it is connect with crank rotation.
5. engine according to claim 4, it is characterised in that:
It is equipped with grease conduits (7) in the sliding sleeve (30), offers oil inlet pipe in the grease conduits (7)
(70) it is connected with oil outlet pipe (71), the oil inlet pipe (70) and oil outlet pipe (71) with the oil duct (40)；
Described grease conduits (7) one end is respectively arranged with oil fuel tube (72) and oil exit pipe (73), the oil fuel tube (72) and institute
Oil inlet pipe (70) connection is stated, the oil exit pipe (73) is connected to the oil outlet pipe (71)；
One end of the oil fuel tube (72) is connect with oil pump (8).
6. engine according to claim 1, it is characterised in that:
Fuel injector (51) and spark plug (52) are further fixedly arranged at the top of the cylinder (5).
7. engine according to claim 2, it is characterised in that:
It is fixedly installed cam (10) on the crankshaft of the crank mechanism (1), the top of the exhaust valve (9) and cam
(10) it is slidably connected, drives exhaust valve (9) to realize the operation opened or closed to exhaust outlet (50) by the rotation of cam (10).
8. engine according to claim 2, it is characterised in that:
The scavenging channel includes upper scavenging channel (64) and lower scavenging channel (65).
9. engine according to claim 2, it is characterised in that:
Scavenging cylinder (6) bottom offers connecting rod movable span, movable in the connecting rod movable span to be equipped with connecting rod (3).
10. engine according to claim 1, it is characterised in that:
The sealing ring includes first gas ring (41), oil ring (42), second gas ring (43), and the oil ring (42) is set to the first gas
Between ring (41) and second gas ring (43), the closure gasket groove of oil ring (42) is connected to oil duct (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821044608.4U CN208564760U (en) | 2018-07-03 | 2018-07-03 | Crankshaft overhead two stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821044608.4U CN208564760U (en) | 2018-07-03 | 2018-07-03 | Crankshaft overhead two stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208564760U true CN208564760U (en) | 2019-03-01 |
Family
ID=65490591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821044608.4U Active CN208564760U (en) | 2018-07-03 | 2018-07-03 | Crankshaft overhead two stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208564760U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590847A (en) * | 2018-07-03 | 2018-09-28 | 甘立武 | Bent axle overhead two stroke engine |
-
2018
- 2018-07-03 CN CN201821044608.4U patent/CN208564760U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590847A (en) * | 2018-07-03 | 2018-09-28 | 甘立武 | Bent axle overhead two stroke engine |
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