CN109723566A - A kind of link assembly reducing piston heat load - Google Patents
A kind of link assembly reducing piston heat load Download PDFInfo
- Publication number
- CN109723566A CN109723566A CN201910150234.7A CN201910150234A CN109723566A CN 109723566 A CN109723566 A CN 109723566A CN 201910150234 A CN201910150234 A CN 201910150234A CN 109723566 A CN109723566 A CN 109723566A
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- Prior art keywords
- connecting rod
- guiding hole
- oil guiding
- piston
- small end
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Abstract
The present invention relates to a kind of link assemblies for reducing piston heat load, belong to technical field of engines.It solves in current engine piston use process the technical problems such as thermic load is high, service life is short.It includes connecting rod, the connecting rod bearing shell with oil guiding hole while the connecting rob bushing with oil guide groove and oil guiding hole of shaft, microcephaly's setting oil guiding hole.The oil guiding hole of connecting rod bearing shell of the invention, the oil guiding hole of connecting rod shank, the oil guide groove of connecting rob bushing and its oil guiding hole, small end of connecting rod oil guiding hole form complete lubricant passage way, the piston cavity assembled so as to the active cooling under the driving of pressure and connecting rod ASSY, the reduction for realizing piston heat load provides a kind of effective way for improving piston reliability and durability.
Description
Technical field
The present invention relates to a kind of link assemblies for reducing piston heat load, belong to technical field of engines.
Background technique
In piston-mode motor, the effect of connecting rod is the crankshaft and piston connected in engine, by the reciprocal fortune of piston
Turn turns to the rotary motion of crankshaft, and the gaseous-pressure that piston is born is transmitted to crankshaft, is done by the external output mechanical energy of crankshaft
Function.Piston subjects ignition temperature and explosion pressure is formed by thermic load and mechanical load when moving reciprocatingly.With hair
The continuous development of motivation technology, densification, integration degree are higher and higher, power per liter is also higher and higher.In this case,
Piston faces more harsh working environment, and piston is cooling and thermal failure becomes the emphasis in current plunger designs.
It joined the design for reducing piston heat load in the development process of piston at present, increase oil duct in piston and work
Cooling nozzles are filled in, but oil duct in piston is only capable of reducing the temperature of piston ring groove and aditus laryngis, to the temperature in combustion chamber center and bottom
It is little to spend cooling effect；In engine operation, piston cooling nozzle changes always at a distance from piston simultaneously, affects cooling
Effect.
With the increasingly raising of engine reinforcing degree, the explosion pressure in engine cylinder is increasing, and steel pistons make
With more and more extensively, steel pistons are low compared with thermal coefficient for aluminum piston, are much higher than aluminum piston so as to cause the thermic load of steel pistons, living
Plug coking trend significantly increases, while the high heat load of piston also results in the quickening of lubricant deterioration speed.
In summary, it is necessary to relevant integrated structure design is carried out, to reduce the thermic load of piston.
Summary of the invention
It is an object of the present invention to overcome the above deficiencies, provides a kind of connection rod set that piston heat load can be effectively reduced
Part and its engine.
The purpose of the present invention can be achieved through the following technical solutions: a kind of link assembly reducing piston heat load, packet
Include connecting rod, connecting rob bushing, connecting rod bearing shell, piston pin and piston, connecting rod includes small end of connecting rod and big end, small end of connecting rod and company
Bar major part is linked into an integrated entity by connecting rod shank, and oil guiding hole is provided in connecting rod shank, and small end of connecting rod is provided with oil guiding hole；Connecting rod
Bushing and small end of connecting rod carry out elastic conjunction, are provided with oil guide groove and oil guiding hole in connecting rob bushing；Connecting rod bearing shell and big end
Elastic conjunction is carried out, is provided with oil guiding hole in connecting rod bearing shell；The piston pin hole of left and right perforation is equipped in piston, the connecting rod of connecting rod is small
Head protrudes into piston, and piston pin is located in connecting rob bushing, and piston pin left and right ends are stretched out connecting rob bushing and protruded into piston pin hole,
It is characterized in that, the oil guide groove and its oil guiding hole of the oil guiding hole of the oil guiding hole of connecting rod bearing shell, connecting rod shank, connecting rob bushing, connecting rod
The oil guiding hole of microcephaly forms complete lubricant passage way, so as to the active cooling piston cavity under the driving of pressure, and then drops
The thermic load of low piston.
Further, small end of connecting rod oil guiding hole include the first side oil guiding hole and second side oil guiding hole, the first side oil guiding hole and
Second side oil guiding hole is symmetrical set on the upper semisection circular arc side wall of small end of connecting rod.
Further, connecting rob bushing includes the compression positioned at the tension portion of small end of connecting rod upper end and positioned at small end of connecting rod lower end
Portion, the thickness of the compression zone are greater than the thickness in tension portion.
Further, connecting rob bushing is provided with non-circle annular oil guide groove, and oil guide groove is communicated with connecting rob bushing oil guiding hole.
Further, the thickness of small end of connecting rod becomes larger from small end of connecting rod to big end direction.
The present invention also provides a kind of engine, the engine includes any one link assembly as described above.
Compared with the existing technology, the invention has the following advantages that
1, by the simple processing of part, complete lubricant passage way can be formed, the cooling piston cavity under the driving of pressure, from
And the temperature of piston combustion bowl center and bottom is reduced, the degradation speed of machine oil is slowed down, overall structure is simple, compact, raw
Production, application cost are lower.
2, connecting rod continues to swing in piston cavity, thereby may be ensured that in radial distance in engine operation process
Entire piston cavity is persistently cooled down in the case where constant.
Detailed description of the invention
The embodiment in attached drawing the present invention is described in detail will be passed through below, it will help understand the purpose of the present invention and excellent
Point, in which:
Fig. 1 is semi-cutaway of the invention.
Fig. 2 is link mechanism figure of the invention.
Fig. 3 is the installation diagram of connecting rod of the present invention, connecting rob bushing, piston, piston pin.
Fig. 4 is bilateral small end of connecting rod oil guiding hole implementation example figure of the present invention.
Fig. 5 is connecting rod tension of the present invention portion and compression zone structure chart.
Fig. 6 is the non-circle annular oil guide groove structure chart of connecting rob bushing of the invention.
Fig. 7 is the left view of Fig. 6 of the present invention.
Description of symbols: 1- connecting rod, 2- connecting rob bushing, 3- connecting rod bearing shell, 4- piston pin, 5- piston, 6- small end of connecting rod,
7- big end, 8- connecting rod shank, 9- connecting rod shank oil guiding hole, 10- small end of connecting rod oil guiding hole, 11- connecting rob bushing oil guide groove,
12- connecting rob bushing oil guiding hole, 13- connecting rod bearing shell oil guiding hole, 14- piston pin hole, 15- piston cavity, the first side 16- oil guiding hole,
17- second side oil guiding hole, 18- small end of connecting rod tension portion, 19- small end of connecting rod compression zone, 20, the non-circle annular of connecting rob bushing are led
Oil groove.
Specific embodiment
The present invention will be further described in conjunction with the embodiment in attached drawing below:
As shown in Figure 1-3, link assembly of the invention mainly includes connecting rod 1, connecting rob bushing 2, connecting rod bearing shell 3, piston pin 4 and lives
Plug 5；Connecting rod 1 includes small end of connecting rod 6 and big end 7, and small end of connecting rod 6 and big end 7 pass through connecting rod shank 8 and connect into one
Body is provided with oil guiding hole 9 in connecting rod shank 8, and small end of connecting rod 6 is provided with oil guiding hole 10；Connecting rob bushing 2 and small end of connecting rod 6 carry out
Elastic conjunction is provided with oil guide groove 11 and oil guiding hole 12 in connecting rob bushing 2；Connecting rod bearing shell 3 and big end 7 carry out interference dress
Match, oil guiding hole 13 is provided in connecting rod bearing shell 3；The piston pin hole 14 of left and right perforation, the small end of connecting rod 6 of connecting rod 1 are equipped in piston 5
It protrudes into piston 3, piston pin 4 is located in connecting rob bushing 2, and 4 left and right ends of piston pin stretch out connecting rob bushing 2 and protrude into piston pin hole
In 14.The structural advantage is, the oil guiding hole 13 of connecting rod bearing shell, the oil guiding hole 9 of connecting rod shank, connecting rob bushing oil guide groove 11 and
Its oil guiding hole 12, small end of connecting rod oil guiding hole 10 form complete lubricant passage way, so as under the driving of pressure actively it is cold
But piston cavity 15 slow down the degradation speed of machine oil to reduce the temperature of piston combustion bowl center and bottom, overall to tie
Structure is simple, compact, and production, application cost are lower；Simultaneously in the swing process of connecting rod, it is ensured that connecting rod and piston radial away from
From persistently cooling down entire piston cavity in the case where constant.
As shown in figure 4, the present invention can design the first side of bilateral connecting rod oil guiding hole according to the cooling capacity needed for piston cavity
Oil guiding hole 16, second side oil guiding hole 17, the adjusting of cooling capacity.
As shown in figure 5, the present invention can be according to relevant FEM calculation, the thickness for designing compression zone 19 is greater than tension portion
18 thickness to increase piston cavity space, and then increases film-cooled heat.Promote cooling capacity.
As shown in fig. 6, the present invention can design different bushing Oil Guides by the calculating of engine oil supplying amount and oil pressure variable quantity
Slot is illustrated as non-circle annular oil guide groove structure 20 to guarantee cooling requirement and reliability requirement.
Further, the relevant calculation according to connecting rod bearing shell than pressure can design the thickness of connecting rod 1 from small end of connecting rod
6 become larger to 7 direction of big end, control of the connecting rod bearing shell than pressure.
Finally, it should be noted that the above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (5)
1. a kind of link assembly for reducing piston heat load, including connecting rod (1), connecting rob bushing (2), connecting rod bearing shell (3), piston pin
(4) and piston (5), connecting rod (1) include small end of connecting rod (6) and big end (7), and small end of connecting rod (6) and big end (7) pass through
Connecting rod shank (8) links into an integrated entity, and is provided in connecting rod shank (8) oil guiding hole (9), and small end of connecting rod (6) is provided with oil guiding hole
(10)；Connecting rob bushing (2) and small end of connecting rod (6) carry out elastic conjunction, are provided with oil guide groove (11) and Oil Guide in connecting rob bushing (2)
Hole (12)；Connecting rod bearing shell (3) and big end (7) carry out elastic conjunction, are provided with oil guiding hole (13) in connecting rod bearing shell (3)；It is living
The piston pin hole (14) that left and right perforation is equipped in (3) is filled in, the small end of connecting rod (6) of connecting rod (1) protrudes into piston (3), piston pin (4)
In connecting rob bushing (2), piston pin (4) left and right ends are stretched out connecting rob bushing (2) and are protruded into piston pin hole (14), feature
It is, the oil guiding hole (13) of connecting rod bearing shell, the oil guiding hole (9) of connecting rod shank, the oil guide groove (11) of connecting rob bushing and its oil guiding hole
(12), the oil guiding hole (10) of small end of connecting rod forms complete lubricant passage way, the active cooling piston cavity under the driving of pressure
(15).
2. a kind of link assembly for reducing piston heat load as described in claim 1, which is characterized in that the small end of connecting rod is led
Oilhole includes the first side oil guiding hole (16) and second side oil guiding hole (17), the first side oil guiding hole (16) and second side oil guiding hole (17)
It is symmetrical set on the upper semisection circular arc side wall of small end of connecting rod (6).
3. a kind of link assembly for reducing piston heat load as described in claim 1, which is characterized in that connecting rob bushing (2) packet
The compression zone (19) positioned at the tension portion (18) of small end of connecting rod upper end and positioned at small end of connecting rod lower end is included, the compression zone (19)
Thickness is greater than the thickness of tension portion (18).
4. a kind of link assembly for reducing piston heat load as described in claim 1, which is characterized in that connecting rob bushing (2) is set
It is equipped with non-circle annular oil guide groove (20), oil guide groove (20) is communicated with connecting rob bushing oil guiding hole (12).
5. a kind of link assembly for reducing piston heat load as described in claim 1, which is characterized in that the connecting rod (1)
Thickness becomes larger along small end of connecting rod (6) to big end (7) direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910150234.7A CN109723566A (en) | 2019-02-28 | 2019-02-28 | A kind of link assembly reducing piston heat load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910150234.7A CN109723566A (en) | 2019-02-28 | 2019-02-28 | A kind of link assembly reducing piston heat load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109723566A true CN109723566A (en) | 2019-05-07 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910150234.7A Pending CN109723566A (en) | 2019-02-28 | 2019-02-28 | A kind of link assembly reducing piston heat load |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359995A (en) * | 2019-06-28 | 2019-10-22 | 广西玉柴机器股份有限公司 | A kind of linkage using the cooling piston of oil duct |
| CN113356991A (en) * | 2020-03-04 | 2021-09-07 | 一汽解放汽车有限公司 | Piston cooling system with pressure detection function and filtering function |
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| CN102330584A (en) * | 2011-08-05 | 2012-01-25 | 无锡开普动力有限公司 | Cooling lubricating structure used for piston connection rod of reciprocating piston internal combustion engine |
| JP2013011206A (en) * | 2011-06-29 | 2013-01-17 | Nissan Motor Co Ltd | Multiple linkage type piston-crank mechanism of internal combustion engine |
| CN104791069A (en) * | 2015-04-08 | 2015-07-22 | 广西玉柴机器股份有限公司 | Connecting rod lubrication oil delivery structure of diesel engine |
| CN105156171A (en) * | 2015-08-18 | 2015-12-16 | 河南柴油机重工有限责任公司 | Lubricating and cooling combined type structure of engine piston and connecting rod set |
| CN107120432A (en) * | 2017-05-08 | 2017-09-01 | 中国第汽车股份有限公司 | A kind of low friction end bushing connecting rod piston latch structure |
| JP2017166568A (en) * | 2016-03-16 | 2017-09-21 | 本田技研工業株式会社 | Internal combustion engine |
| CN209621486U (en) * | 2019-02-28 | 2019-11-12 | 一汽解放汽车有限公司 | A kind of link assembly reducing piston heat load |
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2019
- 2019-02-28 CN CN201910150234.7A patent/CN109723566A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020066423A1 (en) * | 2000-12-01 | 2002-06-06 | Moloney Kevin M. | Two-piece piston assembly with skirt having pin bore oil ducts |
| US20050076858A1 (en) * | 2003-10-09 | 2005-04-14 | Beardmore John M. | Connecting rod with lubricant tube |
| JP2013011206A (en) * | 2011-06-29 | 2013-01-17 | Nissan Motor Co Ltd | Multiple linkage type piston-crank mechanism of internal combustion engine |
| CN102330584A (en) * | 2011-08-05 | 2012-01-25 | 无锡开普动力有限公司 | Cooling lubricating structure used for piston connection rod of reciprocating piston internal combustion engine |
| CN104791069A (en) * | 2015-04-08 | 2015-07-22 | 广西玉柴机器股份有限公司 | Connecting rod lubrication oil delivery structure of diesel engine |
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| CN209621486U (en) * | 2019-02-28 | 2019-11-12 | 一汽解放汽车有限公司 | A kind of link assembly reducing piston heat load |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359995A (en) * | 2019-06-28 | 2019-10-22 | 广西玉柴机器股份有限公司 | A kind of linkage using the cooling piston of oil duct |
| CN113356991A (en) * | 2020-03-04 | 2021-09-07 | 一汽解放汽车有限公司 | Piston cooling system with pressure detection function and filtering function |
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