CN104421322A - Expansion fracture connecting rod assembly of engine piston - Google Patents
Expansion fracture connecting rod assembly of engine piston Download PDFInfo
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- CN104421322A CN104421322A CN201310407583.5A CN201310407583A CN104421322A CN 104421322 A CN104421322 A CN 104421322A CN 201310407583 A CN201310407583 A CN 201310407583A CN 104421322 A CN104421322 A CN 104421322A
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- connecting rod
- expansion fracture
- rises
- big end
- reduced
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Abstract
The invention relates to a connecting rod assembly of an engine piston. The connecting rod assembly of the engine piston comprises a connecting rod, a connecting rod big end connected with a crack shaft, an expansion fracture surface and a connecting rod small end connected with a piston, wherein the connecting rod big end and the connecting rod small end are respectively arranged at two ends of the connecting rod. The connecting rod assembly is technically characterized in that a workblank groove surface is formed on the outer edge of the connecting rod big end, close to the expansion fracture surface, and the expansion fracture surface is formed on a groove-shaped bottom, thus, the stressed area of the expansion fracture surface is reduced, the expansion fracture force is reduced, the size of a defect after expansion fracture is reduced, scraps are reduced and the qualified rate of the product is improved; the shape of a workblank at the expansion fracture position of the connecting rod is adjusted on the basis of the existing gasoline engine connecting rod, the expansion fracture of the connecting rod becomes more easily, the size of the defect on the outer surface can be less than or equal to 1.5*2.5mm after the expansion fracture of the connecting rod due to the optimized structure, the production of connecting rod scraps can be reduced, and the whole life and the practical value of the engine are greatly improved; the connecting rod assembly of the engine piston has the advantages of simple and reasonable structure, low cost, long service life, safety and reliability and the like.
Description
Technical field
The invention belongs to gasoline engine technology field, particularly a kind of cracking connecting rod assembly that rises of engine piston.
Background technique
Connecting rod is one of five large parts of motor, and its quality directly affects performance and the safety of motor.Connecting rod belongs to typical Irregular parts and required precision is relatively high, and therefore processing technology is complicated.The effect of connecting rod connects piston and bent axle, and transmit active force between the two.The to-and-fro motion of piston is made to be converted to the rotary motion of bent axle.Connecting rod is made up of microcephaly, shaft, major part three part.Connecting rod small end is connected with wrist pin, is pressed with anti-attrition bronze bushing in little head bore.Connnecting rod big end is connected with the rod journal of bent axle, and connecting rod bearing cover bolt is connected with upper half part of major part.In order to reduce friction, extending the life-span of rod journal, two semicircular thin-walled connecting rod bearing shells are housed in crank pin end pore.
All the time cannot accurately processing accessories be separated after surface and combination be the problem that people are difficult to overcome always, until invented the disconnected this technological method that rises, made accurate fit and bolt tightening two fracture surface become possibility.Traditional solid forging or cast connecting rod processing adopt parts processing technique: with milling, draw, junction plane that the method such as mill processes connecting rod shank and connecting rod cap respectively; Roughing and semi finishing connecting rod shank, big end hole, little head bore; The positioning pin hole of fine finishing connecting rod cap and the bolt hole of connecting rod shank; Assembling connecting rod shank and connecting rod cap, fine finishing big end hole and little head bore.The nineties in 20th century is connecting rod cracking technology (also claiming con-rod fracture splitting technology) manufacture new process at a kind of connecting rod that automotive industry developed country is full-fledged. be the major transformation to traditional Machining of Connecting Rod technique. and become the important symbol of a national engine link industry development level.Connecting rod cracking technique refers to connecting rod cap, body is separated by rupturing.Specifically processing two stress in advance at crank pin end pore breaking part concentrates groove to broach or laser grooving, then pressure head wedge shape, cone, gravity drop hammer or an easily extensible cylinder move down and enter big end hole, radial force is produced to crank pin end pore, there is crack in trough place, under the continuation effect of radial force, crack constantly expands, and finally connecting rod cap is separated from con-rod only fracture.
Laser scored and the disconnected power that rises accurately, makes meticulous fracture surface to be perfectly assembled into together.The disconnected technology that rises greatly reduces cost and decreases the manufacturing procedure of 50%, compared with conventional method: machine tool investment is low, and the cost of material is low (only 1 blank), and the leading time of whole technique is short.The maximum advantage of laser is not need contact material surface to process, and compared with broaching, laser need not contact workpiece just can carve required line of fracture for the breaking process that rises, and so there is no the wearing and tearing of any stage property.The repeatability of production technology and stability are very high.In addition, laser is very flexible, thus uses same laser can carry out best otch processing to various connecting rod.The life-span of broaching tool is approximately 400, and the life-span of laser optics lens can up to 1000000.
Different from tratitional technology, the cracking connecting rod splitter that rises processing rises by the core of disconnected technology with crucial, plays a decisive role to the quality of processing of connecting rod.
Summary of the invention
The object of this invention is to provide and be a kind ofly convenient to cut the cracking connecting rod assembly that rises of engine piston of section of rising, improve engine link further and to rise disconnected effect.
The object of the present invention is achieved like this, it includes connecting rod, and the connnecting rod big end that connecting rod two ends are connected with bent axle respectively, the section that rises on connnecting rod big end, the connecting rod small end be connected with piston, connecting-rod bolts, is characterized in that: the outer place of the connnecting rod big end near the section that rises is provided with a recessed nest face of blank, is the section that rises bottom described groove-like.
In order to improve the cutting effect of section of rising further, then the Nei Yanchu of the connnecting rod big end of the section that rises is provided with one and rises fault trough.
Advantage of the present invention is:
1, by optimizing structure, being adjusted by connecting rod cracking place blank shape, connecting rod cracking being become and is more prone to, the structure after optimization makes connecting rod cracking split rear outer surface defect size≤1.5mm × 2.5mm; Decrease the generation of connecting rod waste product.2, the processing of the junction plane of connecting rod cap and connecting rod shank is saved; 3, the processing of bolt positioning hole is saved; 4, the independent conveying of connecting rod cap is saved; 5, the rough section that rises increases the area of the junction plane of connecting rod cap and connecting rod shank, this enhances the bearing capacity of connecting rod ASSY after installation and anti-shear ability; 6, connecting rod shank and connecting rod cap are by the section combination assembling of rising of self-assembling formation, not only repeatability and positioning precision good, the precision (circularity, cylindricity) of the figure tolerance of crank pin end pore also keeps well.7, by adding up and calculating: compared with conventional linkage processing method, the laser disconnected technology that rises can save machine tool investment 5%, reduce engine manufacturing procedure 50%-60%, reduces cost of production 5%-20%.
The present invention makes connecting rod blank face into groove shapes by original facing directly, which reduces the section lifting surface area that rises, and makes disconnected power reduction of rising, and make to rise defect size minimizing of having no progeny, and decreases the generation of waste product, add conforming product rate.
Accompanying drawing explanation
Fig. 1 is link assembly structural representation sketch of the present invention;
Fig. 2 is installment state schematic diagram of the present invention.
The symbol description of accompanying drawing major component
1 is piston; 2 is link assembly, and 2-1 is connecting rod small end, and 2-2 is connnecting rod big end, and 2-3 is connecting rod, and 2-4 is connecting rod cap, and 2-5 is connecting-rod bolts, and 2-6 is the recessed nest face of blank, and 2-7 is the fault trough that rises, and 2-8 is the section that rises, and 3 is bent axle.
Be described in further detail the present invention by example below in conjunction with accompanying drawing, but following example is only the present invention's example wherein, do not represent the rights protection scope that the present invention limits, the scope of the present invention is as the criterion with claims.
Embodiment
example 1
Shown in Fig. 1 ~ 2, in figure 2 is link assembly, this link assembly 2 comprises connecting rod 2-3, and the connnecting rod big end 2-2 that connecting rod 2-3 two ends are connected with bent axle 3 respectively, the connecting rod small end 2-1 be connected with piston 1, connnecting rod big end 2-2 symmetrical position is respectively arranged with a connecting-rod bolts 2-5 be connected with bent axle 3, and 2-4 is connecting rod cap; The outer place of the connnecting rod big end 2-2 near the section 2-8 that rises is provided with a recessed nest face of blank, is the section that rises bottom described groove-like; The Nei Yanchu of the connnecting rod big end 2-2 of the section that rises is provided with one to rise fault trough.
This structure is adjusted by connecting rod cracking place blank shape, connecting rod cracking become and is more prone to, after the structure after optimization makes connecting rod cracking split, and outer surface defect size≤1.5mm × 2.5mm;
Connection rod of automobile engine is along the reciprocating mechanical parts of cylinder body axis in stroke piston combustion engine cylinder body.Piston work done under the promotion of high-temperature high-pressure fuel gas, the Closed End of piston bears the pressure of working fluid, and forms firing chamber or minimum cylinder volume with cylinder cap, casing wall, and namely connecting rod promotes the strength member of piston.Make fluted body shape by disconnected place of being gone up by connecting rod by original facing directly and decrease the section lifting surface area that rises, make disconnected power reduction of rising, make to rise defect size minimizing of having no progeny, and decreases the generation of waste product, add conforming product rate.
Claims (2)
1. the cracking connecting rod assembly that rises of an engine piston, it includes connecting rod, and the connnecting rod big end that connecting rod two ends are connected with bent axle respectively, the section that rises on connnecting rod big end, the connecting rod small end be connected with piston, connecting-rod bolts, is characterized in that: the outer place of the connnecting rod big end near the section that rises is provided with a recessed nest face of blank, is the section that rises bottom described groove-like.
2. the cracking connecting rod assembly that rises of engine piston according to claim 1, is characterized in that: the Nei Yanchu of the connnecting rod big end of the section that rises is provided with one and rises fault trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407583.5A CN104421322A (en) | 2013-09-10 | 2013-09-10 | Expansion fracture connecting rod assembly of engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407583.5A CN104421322A (en) | 2013-09-10 | 2013-09-10 | Expansion fracture connecting rod assembly of engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104421322A true CN104421322A (en) | 2015-03-18 |
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ID=52971177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310407583.5A Pending CN104421322A (en) | 2013-09-10 | 2013-09-10 | Expansion fracture connecting rod assembly of engine piston |
Country Status (1)
| Country | Link |
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| CN (1) | CN104421322A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167315A (en) * | 2017-11-22 | 2018-06-15 | 中国北方发动机研究所(天津) | A kind of the connecting rod blank structure and connecting rod method for processing fractured of the swollen disconnected position of controls connecting rod |
| CN108661793A (en) * | 2018-07-16 | 2018-10-16 | 西安爱生技术集团公司 | A kind of horizontally-opposed aero-engine of four cylinder of small two-stroke |
| CN109058280A (en) * | 2018-09-29 | 2018-12-21 | 西安爱生技术集团公司 | A kind of quenched steel alloy of small-sized piston engine rises cracking connecting rod and process for making |
-
2013
- 2013-09-10 CN CN201310407583.5A patent/CN104421322A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167315A (en) * | 2017-11-22 | 2018-06-15 | 中国北方发动机研究所(天津) | A kind of the connecting rod blank structure and connecting rod method for processing fractured of the swollen disconnected position of controls connecting rod |
| CN108661793A (en) * | 2018-07-16 | 2018-10-16 | 西安爱生技术集团公司 | A kind of horizontally-opposed aero-engine of four cylinder of small two-stroke |
| CN109058280A (en) * | 2018-09-29 | 2018-12-21 | 西安爱生技术集团公司 | A kind of quenched steel alloy of small-sized piston engine rises cracking connecting rod and process for making |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150318 |
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| WD01 | Invention patent application deemed withdrawn after publication |