CN203321676U - Offset crankshaft connecting rod mechanism of piston engine - Google Patents
Offset crankshaft connecting rod mechanism of piston engine Download PDFInfo
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- CN203321676U CN203321676U CN2013202306879U CN201320230687U CN203321676U CN 203321676 U CN203321676 U CN 203321676U CN 2013202306879 U CN2013202306879 U CN 2013202306879U CN 201320230687 U CN201320230687 U CN 201320230687U CN 203321676 U CN203321676 U CN 203321676U
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- offset
- connecting rod
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Abstract
The utility model discloses an offset crankshaft connecting rod mechanism of a piston engine, which comprises cylinders, pistons, connecting rods and crankshafts, wherein a center line of each crankshaft is deviated from a vertical center line of each cylinder, and the offset amount L is 9-12 mm; within the offset range, lateral force acting on the pistons can be effectively reduced during power stroke, and then lateral pressure of the pistons to the side surfaces of the cylinders is reduced, so that energy consumed by friction between the pistons and the cylinder walls is correspondingly reduced, not only is the heat efficiency of an internal combustion engine improved, but also the service lives of the cylinders and the pistons can be prolonged; and meanwhile, the crankshafts are arranged in an offset manner, so that the piston stroke is increased, the acting time of the pistons is prolonged, sufficient burning of a fuel is facilitated, more useful work can be obtained under the same burning condition, and accordingly, the fuel efficiency is improved.
Description
Technical field
The utility model relates to engine art, particularly a kind of reciprocating engine offset crankshaft linkage mechanism.
Background technique
Crankshaft & connecting is that motor is realized work cycle, completes the main movement part of transformation of energy, is the power-transmission system in reciprocating internal combustion engine.In expansion stroke, the heat energy reciprocating motion of the pistons that it produces fuel combustion, by the crankshaft rotating motion, change mechanical energy into, externally outputting power.
In prior art, the bent axle round dot central position of reciprocating engine is positioned on the vertical center line of cylinder, crankshaft rotating makes connecting rod produce flexible symmetrical swinging arc, piston promotes back and forth operation in cylinder by connecting rod, in the piston expansion stroke, when crankshaft crank forwards 90 to while spending, bent axle moment of torsion and connecting rod inclination angle are all in maximum value, the side direction horizontal component that piston produces is also maximum, now piston group and connecting rod bearing and cylinder wall can produce larger friction, thereby cause power loss, reduction fuel efficiency.
Therefore, need to the crankshaft & connecting of reciprocating engine be improved, act on lateral force and the frictional force of piston while making it effectively reduce expansion stroke, thereby improved the thermal efficiency of internal-combustion engine, and can extend the working life of cylinder and piston.
The model utility content
In view of this, the utility model provides a kind of reciprocating engine offset crankshaft linkage mechanism, act on lateral force and the frictional force of piston in the time of can effectively reducing expansion stroke, thereby improved the thermal efficiency of internal-combustion engine, and can extend the working life of cylinder and piston.
Reciprocating engine offset crankshaft linkage mechanism of the present utility model, comprise cylinder, piston, connecting rod and bent axle, and described crankshaft axis departs from the setting of described cylinder vertical center line, and Offset L is 9-12mm; Described piston center line departs from the setting of described cylinder vertical center line, and Offset d is 0.5-0.8mm.
Further, described Offset L is 10mm.
Further, described bent axle comprises main journal, connecting rod neck, crank and equilibrium block, the outside end face of described equilibrium block is the arc structure with the main journal coaxial line, between described arc structure radius R scope and petrol engine discharge capacity V, it is following corresponding relation, wherein arc structure radius R dimensional units is millimeter, and engine displacement V unit is for rising:
1.0≤V＜1.1,45≤R＜50;1.1≤V＜1.2,50≤R＜55;1.2≤V＜1.3,55≤R＜60;1.3≤V＜1.4,60≤R＜64;1.4≤V＜1.5,64≤R＜69;1.5≤V＜1.6,69≤R＜73；1.6≤V＜1.7，73≤R＜78；1.7≤V＜1.8，78≤R＜83；1.8≤V＜1.9，83≤R＜87；1.9≤V＜2.0，87≤R＜92；V=2.0，92≤R＜97。
Further, described bent axle is the four cylinder engine bent axle, and described crank quantity is set to eight, comprises crank I-crank VIII, described equilibrium block is set to four, and described four equilibrium blocks are corresponding and be integrally formed at crank I, crank IV, crank V and crank VIII one by one.
Further, the diameter proportion value scope of the Extreme breadth of described crank I, crank IV, crank V and crank VIII and described main journal is 1.4-1.55.
Further, the angle transition position of described bent axle is the fillet structure that round corner rolling process forms.
Further, described connecting rod comprises connecting rod small end, connnecting rod big end and connecting rod shank, at the transition position that is connected of described connnecting rod big end and described connecting rod shank, at least one is set radially gets rid of oil hole.
Further, described piston-top surface caves inward and is provided with a bowl type flare pit, and the end face of described piston and piston circumference side are the flat-tope structure transition.
Further, the pin-and-hole of described piston is noncircular pin hole.
The beneficial effects of the utility model: reciprocating engine offset crankshaft linkage mechanism of the present utility model, comprise cylinder, piston, connecting rod and bent axle, described crankshaft axis departs from the setting of described cylinder vertical center line, Offset is 9-12mm, in this biasing scope, act on the lateral force of piston in the time of can effectively reducing expansion stroke, and then reduce piston to cylinder side lateral pressure, thereby make the energy consumed because of friction between piston and cylinder wall also can correspondingly reduce, not only improved the thermal efficiency of internal-combustion engine, can also extend the working life of cylinder and piston, simultaneously, due to the biasing setting of bent axle, cause piston stroke to strengthen, the piston working application time extends, and is conducive to the abundant burning of fuel, can obtain more useful work under same combustion condition, thereby improve fuel economy, piston coordinates the biasing of the bent axle setting of setovering equally, act on the lateral force of piston in the time of can further reducing expansion stroke, and then reduce piston to cylinder side lateral pressure, make the energy consumed because of friction between piston and cylinder wall also can correspondingly reduce, obtain the effect that better reduces side pressure of piston.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is the utility model structural representation;
Fig. 2 is the crankshaft structure schematic diagram;
Fig. 3 is the bar linkage structure schematic diagram;
Fig. 4 is the piston structure schematic diagram;
Fig. 5 is Figure 1A regional structure enlarged view;
Fig. 6 is that Fig. 2 E is to view.
Embodiment
Fig. 1 is the utility model structural representation, Fig. 2 is the crankshaft structure schematic diagram, Fig. 3 is the bar linkage structure schematic diagram, Fig. 4 is the piston structure schematic diagram, and Fig. 5 is Figure 1A regional structure enlarged view, and Fig. 6 is that Fig. 2 E is to view, as shown in the figure: the reciprocating engine offset crankshaft linkage mechanism of the present embodiment, comprise cylinder 1, piston 2, connecting rod 3 and bent axle 4, described crankshaft axis b departs from described cylinder vertical center line a and arranges, and Offset L is 9-12mm; In the present embodiment, the desirable 9mm of described Offset L, 10mm, 11mm, 12mm, to obtain optimum effect; In the present embodiment, described piston center line c departs from described cylinder vertical center line a and arranges, Offset d is 0.5-0.8mm, Offset d is limited between 0.5-0.8mm, for example 0.5mm, 0.6mm, 0.7mm, 0.8mm, to obtain optimum effect, in the present embodiment, described Offset L is 0.65mm.
In the present embodiment, described bent axle 4 comprises main journal 5, connecting rod neck 6, crank and equilibrium block 7, described equilibrium block is set to four, the outside end face of described equilibrium block is the arc structure with main journal 5 coaxial lines, between described arc structure radius R scope and petrol engine discharge capacity V, it is following corresponding relation, wherein arc structure radius R dimensional units is millimeter, engine displacement V unit is for rising, in form, the crankshaft counter balance arc structure radius R of the corresponding different range of each engine displacement, wherein each scope is three embodiments:
Different displacements met motor in the situation that all can be used four equilibrium block bent axles, even the motor of 1.8l or 2.0l discharge capacity also only needs four equilibrium blocks just can guarantee dynamically balanced requirement, alleviate whole crank shaft weight, improved the motor mechanical efficiency.
In the present embodiment, described bent axle is the four cylinder engine bent axle, described crank quantity is set to eight, comprise crank I 8, crank II 9, crank III 10, crank IV 11, crank V 12, crank VI 13, crank VII 14 and crank VIII 15, described four equilibrium blocks are corresponding and be integrally formed at crank I, crank IV, crank V and crank VIII one by one; In the present embodiment, main journal is set to five, and the corresponding cylinder number of connecting rod neck is set to four; The Placement of equilibrium block and crank has multiple, both can connect by existing machinery Placements such as bolts, also can one-body moldedly arrange, and in the present embodiment, four equilibrium blocks and the one-body molded setting of corresponding crank; Certainly, the petrol engine four equilibrium block bent axles of the present embodiment also comprise timing sprocket axle journal 16 and flywheel flange plate 17.
In the present embodiment, the diameter proportion value scope of the Extreme breadth of described crank I, crank IV, crank V and crank VIII and described main journal is 1.4-1.55; Crank I, crank IV, crank V and crank VIII are under the prerequisite of satisfied and equilibrium block join strength, can control to greatest extent own wt, reduce whole crank shaft weight, and guarantee that whole crank shaft has good bending and torsion rigidity, the crankshaft counterbalance rate is good, improve engine luggine, reduce the bearing maximum load.
In the present embodiment, the angle transition position of described bent axle is the fillet structure that round corner rolling process forms; The fillet structure transition can reduce stress concentrates, and improves the ability that bent axle bears moment of flexure or external force, extends its working life; Adopt the roller rolling technology to process, guarantee that minimum stress is concentrated, the rolling pressure process, according to first being increased to gradually certain load, slowly is decreased to zero technique again after continuing for some time.
In the present embodiment, described connecting rod 3 comprises connecting rod small end 18, connnecting rod big end 19 and connecting rod shank 20, at the transition position that is connected of described connnecting rod big end 19 and described connecting rod shank 20, at least one is set radially gets rid of oil hole 21; In the present embodiment, at described connnecting rod big end, with the transition position both sides that are connected of described connecting rod shank, be provided with the described oil hole that radially gets rid of; The transition that is connected at connnecting rod big end and described connecting rod shank all arranges and radially gets rid of oil hole in bent axle direction of rotation and phase the same side, there is versatility during installation, can increase lubricant oil supplies with, realize between piston ring and cylinder body evenly lubricated, avoid partially rubbing, extend the working life of cylinder body and piston ring, improve lubrication effect.
In the present embodiment, described piston 2 end faces cave inward and are provided with a bowl type flare pit 22, and the end face of described piston 2 and piston 2 circumference sides are the flat-tope structure transition, the transition of indication flat-tope structure refers to that the circumference sagittal plane of piston-top surface from flare pit circumference top edge bead to piston circumference side is for the sharp edge structure without chamfering, and piston-top surface is also vertical flat-top setting with the joint of piston side, the end face of piston and piston circumference side are the flat-tope structure transition, chamfering not, can avoid, because of what chamfering structure caused, inflammable gas or high-temperature high-pressure fuel gas are produced to the guiding to the gap between piston and piston cylinder, can reduce inflammable gas in the gap between piston and piston cylinder and the concentration of high-temperature high-pressure fuel gas, reduce the radial load of compression ring, reduce the corrosion of high-temperature high-pressure fuel gas to compression ring, extend the working life of compression ring, reduce the maintenance cost of internal-combustion engine, firing chamber working surface and the piston-top surface working surface of cylinder head are complementary, the stability of guaranteed discharge product matter, the piston-top surface of flat-tope structure can coordinate with cylinder cap formation compression clearance simultaneously, the area of contact that is conducive to piston minimizing and high-temperature gas, make stress distribution even, guarantee the integrally-built stability of motions of connecting rod, and the piston-top surface of flat-tope structure, as the part of firing chamber, can produce and squeeze the stream effect, combustion gas in cylinder is mixed, contribute to in-cylinder combustion.
In the present embodiment, the pin-and-hole 23 of described piston 2 is noncircular pin hole; Noncircular pin hole is that the noncircular pin hole of the present embodiment can be set to ellipse or cone structure for existing right cylindrical pin-and-hole; Can make the contact of piston pin and piston hole more reasonable, the stress produced while effectively reducing the piston pin boss distortion, reduced the risk that key seat ftractures, performance and the working life of having improved piston.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (8)
1. a reciprocating engine offset crankshaft linkage mechanism, comprise cylinder, piston, connecting rod and bent axle, it is characterized in that: described crankshaft axis departs from the setting of described cylinder vertical center line, and Offset L is 9-12mm; Described piston center line departs from the setting of described cylinder vertical center line, and Offset d is 0.5-0.8mm.
2. reciprocating engine offset crankshaft linkage mechanism according to claim 1, it is characterized in that: described Offset L is 10mm.
3. reciprocating engine offset crankshaft linkage mechanism according to claim 2, it is characterized in that: described bent axle comprises main journal, connecting rod neck, crank and equilibrium block, the outside end face of described equilibrium block is the arc structure with the main journal coaxial line, between described arc structure radius R scope and petrol engine discharge capacity V, it is following corresponding relation, wherein arc structure radius R dimensional units is millimeter, and engine displacement V unit is for rising:
1.0≤V＜1.1,45≤R＜50;1.1≤V＜1.2,50≤R＜55;1.2≤V＜1.3,55≤R＜60;1.3≤V＜1.4,60≤R＜64;1.4≤V＜1.5,64≤R＜69;1.5≤V＜1.6,69≤R＜73；1.6≤V＜1.7，73≤R＜78；1.7≤V＜1.8，78≤R＜83；1.8≤V＜1.9，83≤R＜87；1.9≤V＜2.0，87≤R＜92；V=2.0，92≤R＜97。
4. reciprocating engine offset crankshaft linkage mechanism according to claim 3, it is characterized in that: described bent axle is the four cylinder engine bent axle, described crank quantity is set to eight, comprise crank I-crank VIII, described equilibrium block is set to four, and described four equilibrium blocks are corresponding and be integrally formed at crank I, crank IV, crank V and crank VIII one by one.
5. reciprocating engine offset crankshaft linkage mechanism according to claim 4, it is characterized in that: the diameter proportion value scope of the Extreme breadth of described crank I, crank IV, crank V and crank VIII and described main journal is 1.4-1.55.
6. reciprocating engine offset crankshaft linkage mechanism according to claim 5 is characterized in that: the angle transition position of described bent axle is the fillet structure that round corner rolling process forms.
7. reciprocating engine offset crankshaft linkage mechanism according to claim 6, it is characterized in that: described connecting rod comprises connecting rod small end, connnecting rod big end and connecting rod shank, at the transition position that is connected of described connnecting rod big end and described connecting rod shank, at least one is set radially gets rid of oil hole.
8. reciprocating engine offset crankshaft linkage mechanism according to claim 7, it is characterized in that: described piston-top surface caves inward and is provided with a bowl type flare pit, and the end face of described piston and piston circumference side are the flat-tope structure transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202306879U CN203321676U (en) | 2013-04-28 | 2013-04-28 | Offset crankshaft connecting rod mechanism of piston engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202306879U CN203321676U (en) | 2013-04-28 | 2013-04-28 | Offset crankshaft connecting rod mechanism of piston engine |
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| Publication Number | Publication Date |
|---|---|
| CN203321676U true CN203321676U (en) | 2013-12-04 |
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|---|---|---|---|
| CN2013202306879U Expired - Fee Related CN203321676U (en) | 2013-04-28 | 2013-04-28 | Offset crankshaft connecting rod mechanism of piston engine |
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| CN (1) | CN203321676U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268061A (en) * | 2020-10-20 | 2021-01-26 | 安庆中船柴油机有限公司 | Lubricating connecting rod for engine |
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2013
- 2013-04-28 CN CN2013202306879U patent/CN203321676U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268061A (en) * | 2020-10-20 | 2021-01-26 | 安庆中船柴油机有限公司 | Lubricating connecting rod for engine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 |