CN203925647U - A kind of internal combustion engine connection rod set and internal-combustion engine - Google Patents
A kind of internal combustion engine connection rod set and internal-combustion engine Download PDFInfo
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- CN203925647U CN203925647U CN201420317034.9U CN201420317034U CN203925647U CN 203925647 U CN203925647 U CN 203925647U CN 201420317034 U CN201420317034 U CN 201420317034U CN 203925647 U CN203925647 U CN 203925647U
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- piston
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- combustion engine
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- connecting rod
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Abstract
The utility model discloses a kind of internal combustion engine connection rod set, comprise piston and connecting rod and wrist pin, be provided with piston pin boss on piston, wrist pin is arranged in piston pin boss, and connecting rod is connected with piston by wrist pin; Piston comprises head and skirt section, is provided with at least twice compression oil ring groove together with at least on the outer round surface of head; At head, be provided with internal oil channel, on the inwall of head, be provided with arc surface, the import of internal oil channel is opened on arc surface, and the outlet of internal oil channel is arranged on the inwall of head; One end of connecting rod coordinates with arc surface, offers central oil passage on connecting rod, and central oil passage communicates with internal oil channel.The utility model also provides a kind of internal-combustion engine.The utility model piston crown temperature is low, and piston lubrication performance is good, and piston amount of deformation is little, efficiently solves the problem of piston cracking.
Description
Technical field
The utility model relates to field of internal combustion engine, particularly a kind of internal combustion engine connection rod set and the internal-combustion engine with this piston rod group.
Background technique
Piston rod group comprises piston and connecting rod, and piston slides in cylinder, and connecting rod is connected with piston by wrist pin, and connecting rod is connected with bent axle.Piston rod group is arranged in internal-combustion engine, makes the assembly of reciprocating motion in cylinder, and it is the harshest assembly of internal combustion engine condition, and the functional reliability of internal-combustion engine and useful life longevity are relevant with the working condition of piston rod group to a great extent.Piston guarantees the reliable sealing of internal-combustion engine working medium together with cylinder, otherwise internal-combustion engine just can not run well.The feature of pistons work situation is that operating temperature is very high, and very high under mechanical load high-speed slide, insufficient lubrication simultaneously, this has determined that they suffer strong wearing and tearing, and may produce the faults such as plucking, burn of slidingsurface.
When piston is worked in cylinder, piston-top surface bears the effect of transition high-temperature fuel gas, and the maximum temperature of combustion gas can reach 2000-2500 degree Celsius.Thereby the temperature of piston top is also very high, piston not only temperature is high, and temperature distribution is very inhomogeneous, has very large temperature gradient between each point, and this just becomes the root of thermal stress, and the cracking that this this thermal stress occurs piston head surface has just played important function.The piston heat load of diesel engine is even more serious.
During pistons work, very large atmospheric pressure is born at top, and they all pass to wrist pin by key seat, then passes to connecting rod.Thereby wrist pin and key seat must have enough intensity, enough bearing area and wear resistance.Wherein the rigidity of wrist pin has crucial meaning, if longitudinal rigidity is not enough, and causes load skewness, make key seat fatigue ruption, cause piston longitudinal cracking, lateral stiffness is not enough, make the mistake circle distortion of pin excessive, lubricant film wrecks, and causes that wrist pin bites.
Piston is generally manufactured by aluminum alloy, wrist pin is generally manufactured by steel, because wrist pin is different with piston material, wrist pin is stressed very inhomogeneous with contacting of wrist pin with the inharmonious key seat that makes of temperature distortion with piston, often in piston center, there is initial slight crack, then constantly expansion, even makes piston longitudinal cracking.
Summary of the invention
In view of this, the utility model proposes a kind of internal combustion engine connection rod set and internal-combustion engine, to solve the problem of piston longitudinal cracking.
On the one hand, the utility model provides a kind of internal combustion engine connection rod set, comprises piston and connecting rod and wrist pin, is provided with piston pin boss on piston, and wrist pin is arranged in piston pin boss, and connecting rod is connected with piston by wrist pin; Piston comprises head and skirt section, is provided with at least twice compression oil ring groove together with at least on the outer round surface of head; At head, be provided with internal oil channel, on the inwall of head, be provided with arc surface, the import of internal oil channel is opened on arc surface, and the outlet of internal oil channel is arranged on the inwall of head; One end of connecting rod coordinates with arc surface, offers central oil passage on connecting rod, and central oil passage communicates with internal oil channel.
Further, on the slip surface in skirt section, be provided with spiral groove.
Further, skirt section cross section is oval.
Further, the ovality in skirt section becomes large from bottom to top gradually.
Further, at the top of piston, pit is set.
Further, offer oil groove on arc surface, the import of internal oil channel communicates with oil groove.
Further, on wrist pin and connecting rod fitting surface, offering annular groove, annular groove communicates with central oil passage.
In addition, the utility model also provides a kind of internal-combustion engine, comprises above-mentioned internal combustion engine connection rod set.
A kind of internal combustion engine connection rod set and internal-combustion engine that the utility model provides by being provided with internal oil channel at head, offer central oil passage on connecting rod, central oil passage communicates with internal oil channel, solve head and forced cooling problem, prevented that head is because of thermal stress deformation, caused the problem of piston cracking.
In addition, on the inwall of head, be provided with arc surface, connecting rod coordinates with arc surface.During pistons work, very large atmospheric pressure is born at top, and a part is passed to wrist pin by piston pin boss, then passes to connecting rod; Another part is passed to connecting rod by arc surface, has improved piston and wrist pin stressing conditions, prevents that piston and wrist pin stress deformation from causing the problem of piston cracking.
In addition, on the slip surface in skirt section, be provided with helical groove, improved the bad problem of Skirt Lubrication, prevent that the slidingsurface in skirt section from producing the faults such as plucking, burn.
In addition, skirt section cross section is oval.It is large that the ovality in skirt section becomes from bottom to top gradually, after having improved piston distortion, and the sealability of piston.Top at piston arranges pit, has improved the combustion performance of fuel.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 the utility model internal combustion engine connection rod set schematic diagram;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is that the B of Fig. 2 is to zoomed-in view.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the utility model can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
As depicted in figs. 1 and 2, the internal combustion engine connection rod set that the utility model provides, comprises piston 1 and connecting rod 2 and wrist pin 3, is provided with piston pin boss 15 on piston 1, and wrist pin 3 is arranged in piston pin boss 15, and connecting rod 2 is connected with piston 1 by wrist pin 3.
Piston 1 comprises head 10 and skirt section 11, is provided with at least twice compression 13 oil ring groove 14 together with at least on the outer round surface of head 10; Compression 13 is for compression ring is installed, and compression ring is for the sealing between piston 1 and cylinder.Oil ring groove 14 is for oil ring is installed, and oil ring is for scraping the lubricant oil on cylinder wall, prevents the lubricant oil Indoor Combustion of burning.At head 10, be provided with internal oil channel 12, internal oil channel 12 is for cooling head 10.On the inwall of head 10, be provided with arc surface, the import 18 of internal oil channel is opened on arc surface, and the outlet 19 of internal oil channel is arranged on the inwall of head 10; One end of connecting rod 2 coordinates with arc surface, offers central oil passage 20 on connecting rod 2, and central oil passage 20 communicates with internal oil channel 12.
During piston 1 work, very large atmospheric pressure is born at top, and a part is passed to wrist pin 3 by piston pin boss 15, then passes to connecting rod 2; Another part is passed to connecting rod 2 by arc surface.Piston 1 and wrist pin 3 stressing conditions have been improved.Can not cause load skewness, make piston pin boss 15 fatigue ruptions, cause piston 1 longitudinal cracking, lateral stiffness is not enough, makes the mistake circle distortion of wrist pin 3 excessive, and lubricant film wrecks, the problem such as cause that wrist pin 3 is bitten.
In addition, the lubrication system of internal-combustion engine is to central oil passage 20 fuel feeding, and central oil passage 20 communicates with internal oil channel 12, piston 1 head 10 is forced cooling, prevents that head 10 is because of thermal stress deformation, causes the problem of piston 1 cracking.Can also improve the arc surface lubrication problem that piston 1 coordinates with connecting rod 2.
As shown in Figure 2, for the oil circuit improving between central oil passage 20 and internal oil channel 12 is unobstructed, offer oil groove 17 on arc surface, the import 18 of internal oil channel communicates with oil groove 17.Also can on arc surface, offer the import 18 of a plurality of internal oil channels.In addition, in order to improve connecting rod 2 and wrist pin 3 lubrication problems, on wrist pin 3 and connecting rod 2 fitting surfaces, offering annular groove 30, annular groove 30 communicates with central oil passage 20.Annular groove 30 can be opened on wrist pin 3 outer surfaces, also can be opened on connecting rod 2.
As shown in Figure 3, in order to solve the problem of insufficient lubrication between skirt section 11 and cylinder, be provided with helical groove 4 on the slip surface in skirt section 11, helical groove 4 degree of depth are very little, generally need to observe by magnifying glass.Prevent from altering to firing chamber on lubricant oil, prevent that the slidingsurface in skirt section 11 from producing the faults such as plucking, burn.
As shown in Figure 2, in order to ensure fuel oil fully burning in firing chamber, prevent piston 1 top carbon distribution, at the top of piston 1, pit 16 is set, fuel oil can be gone into eddy current after spraying into firing chamber, has improved the combustion performance of fuel.Skirt section 11 cross sections are oval, piston pin boss 15 directions are oval-shaped minor axis, and the Vertical direction of piston pin boss 15 is oval-shaped major axis, because skirt section 11 is stressed and be subject to thermal change to become gradually large from bottom to top, can cause skirt section 11 and cylinder seal area to reduce, the sealability of piston 1 declines.It is large that the ovality in skirt section 11 becomes from bottom to top gradually, increased skirt section 11 and cylinder seal area, improved the sealability of piston 1.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. an internal combustion engine connection rod set, comprise piston (1) and connecting rod (2) and wrist pin (3), on piston (1), be provided with piston pin boss (15), wrist pin (3) is arranged in piston pin boss (15), and connecting rod (2) is connected with piston (1) by wrist pin (3); Piston (1) comprises head (10) and skirt section (11), is provided with at least twice compression (13) and at least together oil ring groove (14) on the outer round surface of head (10); It is characterized in that, at head (10), be provided with internal oil channel (12), on the inwall of head (10), be provided with arc surface, the import of internal oil channel (18) is opened on arc surface, and the outlet of internal oil channel (19) is arranged on the inwall of head (10); One end of connecting rod (2) coordinates with arc surface, offers central oil passage (20) on connecting rod (2), and central oil passage (20) communicates with internal oil channel (12).
2. internal combustion engine connection rod set according to claim 1, is characterized in that, is provided with spiral groove (4) on the slip surface of skirt section (11).
3. internal combustion engine connection rod set according to claim 1, is characterized in that, skirt section (11) cross section is oval.
4. internal combustion engine connection rod set according to claim 3, is characterized in that, it is large that the ovality of skirt section (11) becomes from bottom to top gradually.
5. internal combustion engine connection rod set according to claim 1, is characterized in that, at the top of piston (1), pit (16) is set.
6. internal combustion engine connection rod set according to claim 1, is characterized in that, offers oil groove (17) on arc surface, and the import of internal oil channel (18) communicates with oil groove (17).
7. according to the internal combustion engine connection rod set described in claim 1 to 6 any one, it is characterized in that, on wrist pin (3) and connecting rod (2) fitting surface, offering annular groove (30), annular groove (30) communicates with central oil passage (20).
8. an internal-combustion engine, comprises the internal combustion engine connection rod set as described in claim 1 to 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420317034.9U CN203925647U (en) | 2014-06-15 | 2014-06-15 | A kind of internal combustion engine connection rod set and internal-combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420317034.9U CN203925647U (en) | 2014-06-15 | 2014-06-15 | A kind of internal combustion engine connection rod set and internal-combustion engine |
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| Publication Number | Publication Date |
|---|---|
| CN203925647U true CN203925647U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420317034.9U Expired - Fee Related CN203925647U (en) | 2014-06-15 | 2014-06-15 | A kind of internal combustion engine connection rod set and internal-combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088683A (en) * | 2014-06-15 | 2014-10-08 | 武汉嗨拓科技有限公司 | Piston connecting rod group for internal combustion engine and internal combustion engine |
-
2014
- 2014-06-15 CN CN201420317034.9U patent/CN203925647U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088683A (en) * | 2014-06-15 | 2014-10-08 | 武汉嗨拓科技有限公司 | Piston connecting rod group for internal combustion engine and internal combustion 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 |
Granted publication date: 20141105 Termination date: 20150615 |
|
| EXPY | Termination of patent right or utility model |