CN203035735U - Connecting rod for diesel engine - Google Patents
Connecting rod for diesel engine Download PDFInfo
- Publication number
- CN203035735U CN203035735U CN 201320028286 CN201320028286U CN203035735U CN 203035735 U CN203035735 U CN 203035735U CN 201320028286 CN201320028286 CN 201320028286 CN 201320028286 U CN201320028286 U CN 201320028286U CN 203035735 U CN203035735 U CN 203035735U
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- rod
- diesel engine
- con
- connecting bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims description 14
- 210000000707 wrist Anatomy 0.000 claims description 14
- 238000005461 lubrication Methods 0.000 abstract description 5
- 238000003698 laser cutting Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910001339 C alloy Inorganic materials 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 2
- 238000005242 forging Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a connecting rod for a diesel engine. The connecting rod for the diesel engine comprises a connecting rod body, wherein a connecting rod small head is arranged at one end of the connecting rod body; a piston pin connection hole is arranged on the connecting rod small head; a connecting rod large head is arranged at the other end of the connecting rod body; a bearing bush mounting hole is arranged on the connecting large head; a connecting rod cover is fixedly connected with the connecting rod large head; the combination face of the connecting rod large head and the connecting rod cover is a laser cutting coarse face; an internal lubrication oil path is arranged on the connecting rod body along an axial direction; the section face of the connecting rod small head along the axial direction of the connecting rod body is trapezoid; a lining is nested inside the piston pin connection hole; and the entire connecting rod is a forged steel piece. The connecting rod for the diesel engine provided by the utility model has the advantages of good lubrication effect, high strength and long fatigue life.
Description
Technical field
The utility model relates to Diesel Engine Technique Field, relates in particular to a kind of diesel engine connecting bar that is applicable to high-power diesel engine.
Background technique
At present, along with the raising of diesel engine strengthening degree, the intensity of common combined type diesel engine connecting bar can't satisfy the diesel engine designing requirement.Conventional linkage is used the design of combined type major part, easily causes stress to concentrate and the generation fatigue damage at the combinating face place, makes connecting rod can't reach the working life of expection; Do not have built-in oil leab, make lack of lubrication between connecting rod small end and the wrist pin, easily cause serious diesel engine faults such as scuffing of cylinder bore, tile kilning; The area of contact of cylindric connecting rod small end and piston thrust surface is less, and the piston thrust surface easily produces irreversible damages such as spot corrosion, cut, delamination; Traditional connecting rod blank is ironcasting or Cast Steel, and defectives such as the pore that produces in casting process, shrinkage porosite, slag inclusion can make the usability of connecting rod greatly reduce.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of diesel engine connecting bar is provided, avoids the combined type major part of connecting rod to cause stress to concentrate and the generation fatigue damage at the junction plane place, improve the working life of connecting rod.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of diesel engine connecting bar, comprise con-rod only, one end of described con-rod only is connecting rod small end, described connecting rod small end is provided with for the wrist pin attachment hole that is connected with diesel engine piston, the other end of described con-rod only is connnecting rod big end, described connnecting rod big end is provided with for the bearing shell mounting hole that crankshaft bearing liner is installed, described connnecting rod big end is fixedly connected with connecting rod cap, and the junction plane of described connnecting rod big end and described connecting rod cap is crude of laser beam cutting.
As preferably, described con-rod only is axially arranged with built-in oil leab along it, and described built-in oil leab connects described wrist pin attachment hole and described bearing shell mounting hole.
Preferred as another kind, described connecting rod small end is trapezoidal along the axial cutting plane of described con-rod only, and described trapezoidal long limit is near described con-rod only.
As further preferred, described wrist pin attachment hole is embedded with lining.
As further preferred, described diesel engine connecting bar is forged steel pieces.
Owing to adopted technique scheme, diesel engine connecting bar of the present utility model, the junction plane of its connnecting rod big end and connecting rod cap is crude of laser beam cutting, when making crude, utilize laser that the connnecting rod big end that is wholely set is cut along cutting surface earlier, the back uses hydraulic equipment that connecting rod is divided from cutting surface, and it is split into con-rod only and connecting rod cap, the macrostructure of division back fracture surface is irregular crude, and microstructure is the metallographic set of iron carbon alloy; When connnecting rod big end and crankshaft bearing liner assembling, two crude faces after the laser beam cutting are closed up, use high tension bolt that connecting rod cap and connnecting rod big end are fastenedly connected, when in conjunction with pressure more than or equal to intermolecular repulsive force the time, two complete merging of fracture surface are got up, and fracture surface unites two into one, thus the phenomenon of having avoided connnecting rod big end junction plane stress to concentrate, prevent fatigue damage, improved the working life of connecting rod.
When in con-rod only, being axially arranged with built-in oil leab along it, lubricant oil enters the mating face of connecting rod small end and wrist pin from oil duct, between forms effective lubricant film, compensate lubricated between connecting rod small end and the wrist pin, prevented from causing because of lack of lubrication serious diesel engine faults such as scuffing of cylinder bore, tile kilning.
When connecting rod small end is trapezoidal shape along the axial cutting plane of con-rod only, compare with the cylindric connecting rod small end of prior art, the area of contact of the connecting rod small end of trapezoidal shape and piston thrust surface is bigger, bearing capacity is strengthened, and can prevent that the piston thrust surface from producing irreversible damages such as spot corrosion, cut, delamination.
When whole diesel engine connecting bar is forged steel pieces, compare with traditional cast iron or the diesel engine connecting bar of Cast Steel, the densification of whole connecting rod microstructure and metallographic structure direction unanimity have been avoided the various defectives that cause in the casting technique, intensity and the fatigue life of greatly having improved connecting rod.
Description of drawings
Fig. 1 is the utility model embodiment's structural representation;
Fig. 2 is the A-A cross-sectional schematic among Fig. 1;
Among the figure: the 1-con-rod only; The built-in oil leab of 11-; The 2-connecting rod small end; 21-wrist pin attachment hole; The 3-connnecting rod big end; 31-bearing shell mounting hole; The 4-connecting rod cap; The 43-junction plane; The 5-high tension bolt; The 6-lining.
Embodiment
Below in conjunction with drawings and Examples the utility model is made further non-limitative illustration.
Shown in Fig. 1 and Fig. 2 are common, diesel engine connecting bar of the present utility model comprises: con-rod only 1, one end of con-rod only 1 is connecting rod small end 2, be provided with for the wrist pin attachment hole 21 that is connected with diesel engine piston at connecting rod small end 2, the other end of con-rod only 1 is connnecting rod big end 3, be provided with for the bearing shell mounting hole 31 that crankshaft bearing liner is installed at connnecting rod big end 3, connecting rod cap 4 is fixedlyed connected with connnecting rod big end 3 by high tension bolt 5, in the present embodiment, connnecting rod big end 3 is crude of laser beam cutting with the junction plane 43 of connecting rod cap 4.
When making crude, utilize laser that the connnecting rod big end that is wholely set is cut along cutting surface earlier, the back uses hydraulic equipment that connecting rod is divided from cutting surface, it is split into con-rod only and connecting rod cap, the macrostructure of division back fracture surface is irregular crude, and microstructure is the metallographic set of iron carbon alloy; When connnecting rod big end and crankshaft bearing liner assembling, two crude faces after the laser beam cutting are closed up, use high tension bolt that connecting rod cap and connnecting rod big end are fastenedly connected, when in conjunction with pressure more than or equal to intermolecular repulsive force the time, two complete merging of fracture surface are got up, and fracture surface unites two into one, thus the phenomenon of having avoided connnecting rod big end junction plane stress to concentrate, prevent fatigue damage, improved the working life of connecting rod.
Wherein, con-rod only 1 is axially arranged with built-in oil leab 11 along it, and this built-in oil leab 11 connects wrist pin attachment hole 21 and bearing shell mounting hole 31.Lubricant oil enters the mating face of connecting rod small end and wrist pin from built-in oil leab 11, between forms effective lubricant film, compensate lubricated between connecting rod small end and the wrist pin, prevented from causing because of lack of lubrication serious diesel engine faults such as scuffing of cylinder bore, tile kilning.
Wherein, connecting rod small end 2 roughly is trapezoidal along con-rod only 1 axial cutting plane, and trapezoidal long limit is embedded with lining 6 near con-rod only at wrist pin attachment hole 21.Compare with traditional cylindric connecting rod small end; under the trapezoidal minor face situation identical with cylindric length; area of contact between trapezoidal connecting rod small end and the piston thrust surface increases about 30%; under identical axial force situation; pressure reduces about 30%; because reducing of pressure, the wear extent of piston thrust surface will obtain excellent protection, thereby improve the working life of piston.
Wherein, diesel engine connecting bar of the present utility model is whole forged steel pieces.Compare with traditional cast iron or the diesel engine connecting bar of Cast Steel, Forging Technology has been avoided the various defectives that cause in the casting technique, make the densification of connecting rod microstructure and metallographic structure direction unanimity, improve the fatigue life of connecting rod approximately 15% that the strength ratio cast connecting rod of connecting rod improves about 20%.
In sum, diesel engine connecting bar of the present utility model is lubricated good, the intensity height, and fatigue life is long, and its performance can satisfy the reinforcement diesel engine requirement of power per liter≤38kw/L.
The above only is giving an example of the utility model preferred embodiments, and the part of wherein not addressing in detail is those of ordinary skills' common practise.Protection domain of the present utility model is as the criterion with the content of claim, and any equivalent transformation that carries out based on technology enlightenment of the present utility model is also within protection domain of the present utility model.
Claims (5)
1. diesel engine connecting bar, comprise con-rod only, one end of described con-rod only is connecting rod small end, described connecting rod small end is provided with for the wrist pin attachment hole that is connected with diesel engine piston, the other end of described con-rod only is connnecting rod big end, described connnecting rod big end is provided with for the bearing shell mounting hole that crankshaft bearing liner is installed, and described connnecting rod big end is fixedly connected with connecting rod cap, it is characterized in that: the junction plane of described connnecting rod big end and described connecting rod cap is crude of laser beam cutting.
2. a kind of diesel engine connecting bar as claimed in claim 1, it is characterized in that: described con-rod only is axially arranged with built-in oil leab along it, and described built-in oil leab connects described wrist pin attachment hole and described bearing shell mounting hole.
3. a kind of diesel engine connecting bar as claimed in claim 1, it is characterized in that: described connecting rod small end is trapezoidal along the axial cutting plane of described con-rod only, and described trapezoidal long limit is near described con-rod only.
4. a kind of diesel engine connecting bar as claimed in claim 3, it is characterized in that: described wrist pin attachment hole is embedded with lining.
5. as each described a kind of diesel engine connecting bar of claim 1 to 4, it is characterized in that: described diesel engine connecting bar is forged steel pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028286 CN203035735U (en) | 2013-01-19 | 2013-01-19 | Connecting rod for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028286 CN203035735U (en) | 2013-01-19 | 2013-01-19 | Connecting rod for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035735U true CN203035735U (en) | 2013-07-03 |
Family
ID=48687864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320028286 Expired - Lifetime CN203035735U (en) | 2013-01-19 | 2013-01-19 | Connecting rod for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035735U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989723A (en) * | 2015-06-29 | 2015-10-21 | 唐萍 | Automobile connecting rod |
| CN106224094A (en) * | 2016-08-31 | 2016-12-14 | 河北华北柴油机有限责任公司 | 12 cylinder water-cooled Diesel engines |
| CN108799317A (en) * | 2018-06-21 | 2018-11-13 | 力帆实业(集团)股份有限公司 | A kind of gasoline engine connecting rod |
-
2013
- 2013-01-19 CN CN 201320028286 patent/CN203035735U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989723A (en) * | 2015-06-29 | 2015-10-21 | 唐萍 | Automobile connecting rod |
| CN106224094A (en) * | 2016-08-31 | 2016-12-14 | 河北华北柴油机有限责任公司 | 12 cylinder water-cooled Diesel engines |
| CN108799317A (en) * | 2018-06-21 | 2018-11-13 | 力帆实业(集团)股份有限公司 | A kind of gasoline engine connecting rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |