CN101806246A - Piston connecting rod structure of internal-combustion engine - Google Patents
Piston connecting rod structure of internal-combustion engine Download PDFInfo
- Publication number
- CN101806246A CN101806246A CN201010154622A CN201010154622A CN101806246A CN 101806246 A CN101806246 A CN 101806246A CN 201010154622 A CN201010154622 A CN 201010154622A CN 201010154622 A CN201010154622 A CN 201010154622A CN 101806246 A CN101806246 A CN 101806246A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- piston
- small end
- wedge
- pin
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention relates to a piston connecting rod structure of an internal-combustion engine. A piston is hinged with a connecting rod small end through a piston pin. The piston connecting rod structure is characterized in that the left and right symmetrical sides of the connecting rod small end are provided with inclined planes so that the connecting rod small end forms a wedge-shaped head; the center of the inclined plane at the symmetrical side of the wedge-shaped head is provided with a through hole for assembling the piston pin; the part of the piston for assembling a connecting rod is provided with a wedge-shaped groove; and a pin hole formed on a piston pin seat of the piston passes through the wedge-shaped groove. The connecting rod small end adopts a wedge-shaped structure, so a reciprocating inertia force of the connecting rod is reduced by subtracting the residual mass of the connecting rod, and meanwhile the strength and rigidity of the piston connecting rod can be satisfied.
Description
Technical field
The present invention be more particularly directed to a kind of piston connecting rod structure of internal-combustion engine.
Background technique
The piston of Small Universal internal-combustion engine is connected with connecting rod small end by wrist pin, and connnecting rod big end is connected by crank pin with bent axle, and piston drives the bent axle rotation by connecting rod during internal combustion engine.Because connecting rod carries out periodically variable to-and-fro motion and self swing with it under the driving of reciprocating motion of the pistons, what therefore connecting rod was subjected to is compression, the intersection varying load that stretching and bending etc. are very complicated, this must have enough strength and stiffness to guarantee proper functioning and working life with regard to requiring connecting rod, therefore existing piston connecting rod small end bi-side symmetrical parallel normally, see Fig. 2,5 liang of symmetrical side end face 3a of connecting rod small end are parallel, and the fitting recess both sides of corresponding piston 1 also are parallel edges, though the notch both sides of fitting recess are provided with a bit of hypotenuse 2a for the ease of assembling, this hypotenuse 2a does not surpass the pin-and-hole center line 4 of wrist pin.Adopt this parallel symmetry plane microcephaly to make the thickness of connecting rod small end can satisfy the needs of strength and stiffness.Yet, because at present to satisfy the strength and stiffness of connecting rod by the mode that guarantees connecting rod thickness, the quality of connecting rod is increased, the big more inertial force of connecting rod when moving back and forth that just makes of quality is big more, and reciprocal inertia force is big more, influence to the piston rod exercise performance is big more, can cause service life of engine and performance to suffer adverse effect thus.At quality and the conflicting problem of inertial force that piston rod exists, how to solve under the prerequisite that guarantees connecting rod strength and rigidity, reduce the problem of piston rod reciprocal inertia force, be a difficult problem of internal-combustion engine manufacturing industry for a long time always.
Summary of the invention
The piston connecting rod structure that the purpose of this invention is to provide a kind of internal-combustion engine, it makes connecting rod small end adopt wedge-shaped structure, realizes reducing of connecting rod reciprocal inertia force by the quality more than needed that deducts connecting rod, can satisfy the strength and stiffness of piston rod simultaneously again.
The object of the present invention is achieved like this: piston is hinged by wrist pin and connecting rod small end, the bilateral symmetry side of described connecting rod small end is set to the inclined-plane, make connecting rod small end form the wedge shape head, the symmetrical skew back face center of wedge shape head is provided for assembling the through hole of wrist pin, the position that being used to of described piston assembled connecting rod is set to wedge slot, and the pin-and-hole that is provided with on the piston pin boss of piston passes from wedge slot.
The angle of the medial axis of described connecting rod small end inclined-plane and connecting rod is 5 °～20 °.
The hypotenuse height of the wedge slot on the described piston is greater than the height at piston pin hole center.
Owing to adopt technique scheme, the bilateral symmetry side of connecting rod small end is set to the inclined-plane, make connecting rod small end form the wedge shape head, can be under the prerequisite of the strength and stiffness that satisfy connecting rod, reduce the quality more than needed of connecting rod to greatest extent, should " more than needed quality " be meant satisfying whole workpiece intensity, but because structural restriction, make part a part safety coefficient too high (generally greater than 5) and cause this part mass excess; The position that being used to of described piston assembled connecting rod is set to wedge slot, reduces the quality more than needed of piston equally to greatest extent.The total quality of realizing piston rod thus alleviates, and realizes reducing of piston rod reciprocal inertia force, to guarantee the mechanical property and the working life of piston rod, improves the service behaviour of internal-combustion engine simultaneously.
The angle of the medial axis of described connecting rod small end inclined-plane and connecting rod is 5 °～20 °, by this angle parameter, can guarantee that the intensity of connecting rod small end and rigidity can not weaken, and what deduct is quality more than needed.
The hypotenuse height of the wedge slot on the described piston is realized the minimizing of piston quality more than needed thus, and can not influenced piston self intensity greater than the height at piston pin hole center.
Of the present invention simple in structure, make easily, it is by being made into connecting rod small end the wedge shape microcephaly, the connecting rod fitting recess of piston is made into wedge slot, reduced the quality more than needed of piston rod to greatest extent, the to-and-fro motion inertial force of piston rod is reduced, solved existing piston rod and can't overcome contradiction between quality and the inertial force, thereby improve the performance of internal-combustion engine.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of existing connecting rod.
In the accompanying drawing, 1 is piston, 2,2a is hypotenuse, and 3 is the inclined-plane, and 3a is the side end face, and 4 is the pin-and-hole center, and 5 is connecting rod small end, and 6 is connnecting rod big end, and 7 is through hole.
Embodiment
With reference to Fig. 1, the piston 1 of internal-combustion engine is connected with connecting rod small end 5 by wrist pin, and connnecting rod big end 6 is connected by crank pin with bent axle, and piston drives the bent axle rotation by connecting rod during internal combustion engine.The bilateral symmetry side of described connecting rod small end 5 is set to inclined-plane 3, makes connecting rod small end 5 form the wedge shape head, can reduce the quality more than needed of connecting rod to greatest extent under the prerequisite of the strength and stiffness that satisfy connecting rod.Connecting rod small end inclined-plane 3 is 5 °～20 ° with the angle of the medial axis of connecting rod, by this angle parameter, the intensity and the rigidity that can guarantee connecting rod small end can not weaken, and what deduct is quality more than needed, and the angle of the medial axis of present embodiment connecting rod small end inclined-plane and connecting rod is 10 °.Symmetrical skew back face 3 centers of wedge shape head are provided for assembling the through hole 7 of wrist pin.The position that being used to of described piston 1 assembled connecting rod is set to wedge slot, and the pin-and-hole that is provided with on the piston pin boss of piston passes from wedge slot.Hypotenuse 2 height of the wedge slot on the described piston 1 are realized the minimizing of piston quality more than needed thus, and can not influenced piston self intensity greater than the height at piston pin hole center.
The connecting rod assembly process: the connecting rod small end 5 of connecting rod is inserted the wedge slot of pistons, and the through hole of connecting rod small end 5 is relative with piston pin hole, fixes from the piston pin hole one side wrist pin of packing into.By changing the structure of connecting rod small end, can not weaken in the intensity and the rigidity that guarantee connecting rod small end, and what deduct is quality more than needed.
Claims (3)
1. the piston connecting rod structure of an internal-combustion engine, piston is hinged by wrist pin and connecting rod small end, it is characterized in that: the bilateral symmetry side of described connecting rod small end is set to the inclined-plane, make connecting rod small end form the wedge shape head, the symmetrical skew back face center of wedge shape head is provided for assembling the through hole of wrist pin, the position that being used to of described piston assembled connecting rod is set to wedge slot, and the pin-and-hole that is provided with on the piston pin boss of piston passes from wedge slot.
2. according to the piston connecting rod structure of the described internal-combustion engine of claim 1, it is characterized in that: the angle of the medial axis of described connecting rod small end inclined-plane and connecting rod is 5 °～20 °.
3. according to the piston connecting rod structure of the described internal-combustion engine of claim 1, it is characterized in that: the hypotenuse height of the wedge slot on the described piston is greater than the height at piston pin hole center.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010154622A CN101806246A (en) | 2010-04-26 | 2010-04-26 | Piston connecting rod structure of internal-combustion engine |
| PCT/CN2011/073283 WO2011134379A1 (en) | 2010-04-26 | 2011-04-25 | Piston connecting rod structrue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010154622A CN101806246A (en) | 2010-04-26 | 2010-04-26 | Piston connecting rod structure of internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101806246A true CN101806246A (en) | 2010-08-18 |
Family
ID=42608176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010154622A Pending CN101806246A (en) | 2010-04-26 | 2010-04-26 | Piston connecting rod structure of internal-combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101806246A (en) |
| WO (1) | WO2011134379A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011134379A1 (en) * | 2010-04-26 | 2011-11-03 | 隆鑫通用动力股份有限公司 | Piston connecting rod structrue |
| CN103306815A (en) * | 2013-07-03 | 2013-09-18 | 湖南江滨机器（集团）有限责任公司 | Piston connection rod structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2585983Y (en) * | 2002-08-22 | 2003-11-12 | 江苏大学 | Crank-guide of single-cylinder diesel engine |
| CN201401242Y (en) * | 2009-05-12 | 2010-02-10 | 东风朝阳柴油机有限责任公司 | Piston combustion chamber of diesel motor |
| CN201705490U (en) * | 2010-04-26 | 2011-01-12 | 隆鑫工业有限公司 | Piston connecting rod structure of internal combustion engine |
| CN201705489U (en) * | 2010-03-30 | 2011-01-12 | 重庆长安汽车股份有限公司 | Piston with wedge-shaped piston pin structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4269083A (en) * | 1979-07-27 | 1981-05-26 | General Motors Corporation | Connecting rod |
| CN2859003Y (en) * | 2005-12-09 | 2007-01-17 | 徐州重型机械有限公司 | Detachable piston rod mechanism |
| CN2888159Y (en) * | 2006-02-06 | 2007-04-11 | 潍柴动力股份有限公司 | Improved engine connecting rod |
| CN2934720Y (en) * | 2006-07-26 | 2007-08-15 | 安徽江淮汽车股份有限公司 | 2.8L pressurized central-cooling diesel oil engine connection rod |
| CN101806246A (en) * | 2010-04-26 | 2010-08-18 | 隆鑫工业有限公司 | Piston connecting rod structure of internal-combustion engine |
-
2010
- 2010-04-26 CN CN201010154622A patent/CN101806246A/en active Pending
-
2011
- 2011-04-25 WO PCT/CN2011/073283 patent/WO2011134379A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2585983Y (en) * | 2002-08-22 | 2003-11-12 | 江苏大学 | Crank-guide of single-cylinder diesel engine |
| CN201401242Y (en) * | 2009-05-12 | 2010-02-10 | 东风朝阳柴油机有限责任公司 | Piston combustion chamber of diesel motor |
| CN201705489U (en) * | 2010-03-30 | 2011-01-12 | 重庆长安汽车股份有限公司 | Piston with wedge-shaped piston pin structure |
| CN201705490U (en) * | 2010-04-26 | 2011-01-12 | 隆鑫工业有限公司 | Piston connecting rod structure of internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011134379A1 (en) * | 2010-04-26 | 2011-11-03 | 隆鑫通用动力股份有限公司 | Piston connecting rod structrue |
| CN103306815A (en) * | 2013-07-03 | 2013-09-18 | 湖南江滨机器（集团）有限责任公司 | Piston connection rod structure |
| CN103306815B (en) * | 2013-07-03 | 2016-02-17 | 湖南江滨机器（集团）有限责任公司 | A kind of piston crank mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011134379A1 (en) | 2011-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10408093B2 (en) | Welded high-pressure fuel pump roller tappet | |
| CN103867060A (en) | Cam motion closer | |
| CN108999876A (en) | Freezer compressor link assembly | |
| CN101806246A (en) | Piston connecting rod structure of internal-combustion engine | |
| CN201705490U (en) | Piston connecting rod structure of internal combustion engine | |
| CN106090163A (en) | A kind of toggle of electromotor | |
| CN202326670U (en) | Crankshaft of glove crimper | |
| CN202091340U (en) | Automobile engine crankshaft | |
| CN208982471U (en) | Freezer compressor link assembly | |
| CN103032162A (en) | Reciprocating inertial force balance mechanism of internal-combustion engine | |
| CN105257423A (en) | Cylinder cover | |
| CN102330658A (en) | Connecting rod installation structure applied to opposed double-cylinder refrigeration compressor | |
| CN201802856U (en) | Constant-strength piston pin | |
| CN201827315U (en) | Combined type crankshaft connecting rod mechanism | |
| CN109630536A (en) | 20 cylinder diesel crankshaft of V-type | |
| CN113795656B (en) | Variable compression ratio mechanism, engine and automobile | |
| CN204267507U (en) | A kind of bent axle of diesel engine | |
| JP2012219629A (en) | Engine | |
| CN202391940U (en) | Engine connecting rod | |
| CN110657024A (en) | Variable compression ratio mechanism and engine | |
| CN110671199A (en) | Variable compression ratio mechanism and engine | |
| CN207393424U (en) | A kind of crosshead with bushing and oilhole | |
| CN2585983Y (en) | Crank-guide of single-cylinder diesel engine | |
| CN202391939U (en) | Connecting rod body of automobile engine | |
| CN203962672U (en) | A kind of wedge shape small end con rod |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100818 |