CN101761384B - Engine piston connecting rod structure - Google Patents
Engine piston connecting rod structure Download PDFInfo
- Publication number
- CN101761384B CN101761384B CN 200810235163 CN200810235163A CN101761384B CN 101761384 B CN101761384 B CN 101761384B CN 200810235163 CN200810235163 CN 200810235163 CN 200810235163 A CN200810235163 A CN 200810235163A CN 101761384 B CN101761384 B CN 101761384B
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- China
- Prior art keywords
- connecting rod
- piston
- bearing
- pin
- piston pin
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Abstract
The invention discloses an engine piston connecting rod structure. A combustion chamber is arranged on the top of the piston; a small head of a connecting rod under the combustion chamber is connected with a piston pin; two ends of the piston pin are supported in a piston pin hole; the improvement is that a support base which is passed through a fan-shaped notch on the small head of the connecting rod and is contacted with the piston pin is arranged right under the bottom of the combustion chamber; the contact surface is an arc surface; and a clearance is leaved between the support base and the fan-shaped notch. The structure of the invention is used as an important mechanism in an engine cylinder. Due to the arranged support base, the bottom of the combustion chamber and the piston pin are mutually supported and the stiffness thereof is enhanced, so the deformation during work is small, the sealing property of a piston ring is improved, the air loss and the oil consumption are decreased and the property index of the engine is efficiently improved. The support base is further limited, so no working resistance is increased, no influence is on the strength of the connecting rod and the use effect is excellent.
Description
Technical field
The present invention relates to a kind of piston connecting rod structure for cylinder.
Background technique
Piston connecting rod structure in the cylinder plays very important effect for the performance of motor.The linkage structure of piston and connecting rod is that connecting rod small end is enclosed within on the wrist pin in the cylinder at present, there is lining the cooperation place, wrist pin two is bearing in the piston pin hole of piston, nothing supports between bottom, firing chamber and the wrist pin, the gaseous-pressure that produces in the firing chamber like this passes to wrist pin two by piston head, is passed to the microcephaly of connecting rod by wrist pin again.Because the bottom, firing chamber is cavity, rigidity is relatively poor, and wrist pin only depends on two supporting, middle suffered moment of flexure is larger, thereby under huge gaseous-pressure, piston crown and wrist pin distortion are larger, cause the piston ring packing variation, piston and cylinder wear strengthen, and air leakage and oil consumption increase, and directly affect usability and the exhaust index of motor.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art part, provide a kind of and can reduce piston crown and wrist pin distortion, improve the piston ring packing performance, reduce air leakage and oil consumption, improve the engine piston connecting rod structure of engine performance index.
Technological scheme of the present invention is: the piston head combuster, the connecting rod small end of below, firing chamber is connected with wrist pin and lining, wrist pin two is bearing in the piston pin hole of piston, improvements are to be provided with sector notch and the contacted bearing of wrist pin that passes on connecting rod small end and the lining under the bottom of described firing chamber, the surface of contact of bearing and wrist pin is arc surface, this arc surface and piston pin hole inwall are positioned on the same cylndrical surface, and be gapped between described sector notch and the bearing.
Further scheme is: described bearing is tapered along straight pin cross section radially, and the end width in this cross section is less than the root width, and the end width is 3-6mm; Described bearing along cylindrical pin to thickness less than 1/3 of connecting rod small end thickness.
Among the present invention, owing to being provided with bearing in the bottom, firing chamber, bearing contacts with wrist pin, bottom, firing chamber and wrist pin middle part are supported mutually, strengthened both rigidity, thereby when work distortion is very little, and then improves the piston ring packing performance, reduce air leakage and oil consumption, Effective Raise engine performance index.In this structure, bearing and wrist pin surface of contact are less arc surface, and do not contact with connecting rod small end and lining, and the size of bearing is further defined, do not increase resistance when piston rod is worked like this, also can not affect the intensity of connecting rod small end, using effect is good.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is A-A place sectional drawing among Fig. 1.
Embodiment
Referring to accompanying drawing, the top combuster 1 of piston 2, the microcephaly who is positioned at the connecting rod 6 of below, firing chamber is sleeved on the wrist pin 5, there is lining 3 cooperation place, wrist pin two is bearing in the piston pin hole of piston, the firing chamber is provided with bearing 4 under the bottom, the sector notch 7 that this bearing passes on connecting rod small end and the lining contacts with wrist pin 5, surface of contact is arc surface, this arc surface and piston pin hole inwall are positioned on the same cylndrical surface, gapped between described breach 7 and the bearing 4, do not contact each other during work, bearing 4 is tapered along straight pin cross section radially, the wide 4mm in its end, the root width is greater than the end width, bearing 4 along cylindrical pin to thickness be 1/4 of connecting rod small end thickness.
Claims (3)
1. engine piston connecting rod structure, the piston head combuster, the connecting rod small end of below, firing chamber is connected with wrist pin and lining, wrist pin two is bearing in the piston pin hole of piston, it is characterized in that being provided with sector notch and the contacted bearing of wrist pin that passes on connecting rod small end and the lining under the bottom of described firing chamber, the surface of contact of bearing and wrist pin is arc surface, and this arc surface and piston pin hole inwall are positioned on the same cylndrical surface, and be gapped between described sector notch and the bearing.
2. by the described engine piston connecting rod structure of claim 1, it is characterized in that: described bearing is tapered along straight pin cross section radially, and the end width in this cross section is less than the root width, and the end width is 3-6mm.
3. by the described engine piston connecting rod structure of claim 1, it is characterized in that: described bearing along cylindrical pin to thickness less than 1/3 of connecting rod small end thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810235163 CN101761384B (en) | 2008-11-10 | 2008-11-10 | Engine piston connecting rod structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810235163 CN101761384B (en) | 2008-11-10 | 2008-11-10 | Engine piston connecting rod structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101761384A CN101761384A (en) | 2010-06-30 |
| CN101761384B true CN101761384B (en) | 2013-03-06 |
Family
ID=42492749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810235163 Active CN101761384B (en) | 2008-11-10 | 2008-11-10 | Engine piston connecting rod structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101761384B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2821645A1 (en) * | 1978-05-18 | 1979-11-22 | Paul Hilpert | Piston for internal combustion engine - has thrust pad under crown to transmit force directly to connecting rod |
| CN2137314Y (en) * | 1992-06-23 | 1993-06-30 | 唐为民 | Piston and connecting rod mechanism used for internal combustion engine |
| CN1122624A (en) * | 1993-05-04 | 1996-05-15 | 内维尔·托马斯·奥尔索普 | Piston and connecting rod assembly |
| CN1479839A (en) * | 2000-12-08 | 2004-03-03 | Lg电子株式会社 | Mounting structure of piston pin for hermetic compressor |
| CN1714232A (en) * | 2002-12-06 | 2005-12-28 | 玛勒有限公司 | Multipart cooled piston for an internal combustion engine |
| CN200958428Y (en) * | 2006-09-21 | 2007-10-10 | 东风汽车有限公司 | Combined piston of diesel engine for vehicle |
-
2008
- 2008-11-10 CN CN 200810235163 patent/CN101761384B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2821645A1 (en) * | 1978-05-18 | 1979-11-22 | Paul Hilpert | Piston for internal combustion engine - has thrust pad under crown to transmit force directly to connecting rod |
| CN2137314Y (en) * | 1992-06-23 | 1993-06-30 | 唐为民 | Piston and connecting rod mechanism used for internal combustion engine |
| CN1122624A (en) * | 1993-05-04 | 1996-05-15 | 内维尔·托马斯·奥尔索普 | Piston and connecting rod assembly |
| CN1479839A (en) * | 2000-12-08 | 2004-03-03 | Lg电子株式会社 | Mounting structure of piston pin for hermetic compressor |
| CN1714232A (en) * | 2002-12-06 | 2005-12-28 | 玛勒有限公司 | Multipart cooled piston for an internal combustion engine |
| CN200958428Y (en) * | 2006-09-21 | 2007-10-10 | 东风汽车有限公司 | Combined piston of diesel engine for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101761384A (en) | 2010-06-30 |
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