CN103016191A - Piston skirt profile line structure - Google Patents
Piston skirt profile line structure Download PDFInfo
- Publication number
- CN103016191A CN103016191A CN2012104813435A CN201210481343A CN103016191A CN 103016191 A CN103016191 A CN 103016191A CN 2012104813435 A CN2012104813435 A CN 2012104813435A CN 201210481343 A CN201210481343 A CN 201210481343A CN 103016191 A CN103016191 A CN 103016191A
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- China
- Prior art keywords
- piston
- ellipse
- skirt
- supporting surface
- piston skirt
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- 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.)
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Abstract
The invention discloses a piston skirt profile line structure which comprises a sealing ring groove (1), an inner ring supporting surface (2), a piston pin hole (3), an outer ring supporting surface (4) and a middle-bulged varying ellipse profile line (5). The sealing ring groove (1) is arranged on a top skirt cylindrical fitting surface; the inner ring supporting surface (2) and the outer ring supporting surface (4) are arranged at the top of a piston skirt; the piston pin hole (3) is formed in the middle of the piston skirt; and the middle-bulged varying ellipse profile line (5) is arranged on the outer cylindrical surface of the piston skirt. The piston skirt profile line structure has the advantages that the excircle of a piston is designed into a special excircle (middle-bulged varying ellipse), so that a cross section perpendicular to the axis of the piston is an ellipse or a modified ellipse, the ellipticity changes in the axis direction according to certain rules, a convex ellipse of the piston shape is different from a common ellipse, the ellipse skirt adopts a structural mode of a convex reducing ellipse, the rules are that a long diameter becomes smaller, bigger and then smaller from the bottom end of the skirt part to the upper part and a short diameter becomes larger and smaller, and the gap between the piston and a cylinder is reduced.
Description
Technical field
The present invention relates to a kind of piston skirt shape line structure.
Background technique
In the prior art, piston skirt shape line structure can not guarantee that piston satisfies heat resistance, stably guidance quality and good sealing function.
Summary of the invention
The purpose of this invention is to provide a kind of piston skirt shape line structure.
The technological scheme that the present invention adopts for achieving the above object is: a kind of piston skirt shape line structure, comprise closure gasket groove (1), inner ring supporting surface (2), piston pin hole (3), outer ring supporting surface (4) and middle-convex and varying ellipse molded line (5), described closure gasket groove (1) is arranged on the skirt cylindrical fit face of top, inner ring supporting surface (2) and outer ring supporting surface (4) are arranged on the piston skirt top, piston pin hole (3) is arranged on the centre of piston skirt, and described middle-convex and varying ellipse molded line (5) is arranged on the external cylindrical surface of piston skirt.
A kind of piston skirt of the present invention shape line structure, the cylindrical of piston is designed to special-shaped cylindrical (middle-convex and varying ellipse), namely the cross section perpendicular to piston axis is oval or revises oval, and ovality changes according to certain rules along axial direction, the convexity ellipse of piston profile is different from again common ellipse, the piston skirt is the structure shape of convexity reducing ellipse, its rule diminishes for the major diameter that makes progress from the bottom, skirt section changes from small to big again, minor axis is for from large to small, and reduce cylinder prepareding gap, to guarantee the heat resistance of piston, wear resistance, guidance quality and good sealing function reduce the frictional work loss of motor stably, reduce oil consumption, noise and discharging.
Description of drawings
Fig. 1 is the structural representation of a kind of piston skirt of the present invention shape line structure.
Among the figure: 1, closure gasket groove; 2, inner ring supporting surface; 3, piston pin hole; 4, outer ring supporting surface; 5, middle-convex and varying ellipse molded line.
Embodiment
As shown in Figure 1, piston skirt shape line structure, comprise closure gasket groove 1, inner ring supporting surface 2, piston pin hole 3, outer ring supporting surface 4 and middle-convex and varying ellipse molded line 5, closure gasket groove 1 is arranged on the skirt cylindrical fit face of top, inner ring supporting surface 2 and outer ring supporting surface 4 are arranged on the piston skirt top, piston pin hole 3 is arranged on the centre of piston skirt, middle-convex and varying ellipse molded line 5 is arranged on the external cylindrical surface of piston skirt, a kind of piston skirt of the present invention shape line structure, the cylindrical of piston is designed to special-shaped cylindrical (middle-convex and varying ellipse), namely the cross section perpendicular to piston axis is oval or revises oval, and ovality changes according to certain rules along axial direction, the convexity ellipse of piston profile is different from again common ellipse, the piston skirt is the structure shape of convexity reducing ellipse, its rule diminishes for the major diameter that makes progress from the bottom, skirt section changes from small to big again, minor axis is for from large to small, and reduce cylinder prepareding gap, to guarantee the heat resistance of piston, wear resistance, stably guidance quality and good sealing function, reduce the frictional work loss of motor, reduce oil consumption, noise and discharging.
Claims (1)
1. piston skirt shape line structure, it is characterized in that: comprise closure gasket groove (1), inner ring supporting surface (2), piston pin hole (3), outer ring supporting surface (4) and middle-convex and varying ellipse molded line (5), described closure gasket groove (1) is arranged on the skirt cylindrical fit face of top, inner ring supporting surface (2) and outer ring supporting surface (4) are arranged on the piston skirt top, piston pin hole (3) is arranged on the centre of piston skirt, and described middle-convex and varying ellipse molded line (5) is arranged on the external cylindrical surface of piston skirt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104813435A CN103016191A (en) | 2012-11-23 | 2012-11-23 | Piston skirt profile line structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104813435A CN103016191A (en) | 2012-11-23 | 2012-11-23 | Piston skirt profile line structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103016191A true CN103016191A (en) | 2013-04-03 |
Family
ID=47965189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104813435A Pending CN103016191A (en) | 2012-11-23 | 2012-11-23 | Piston skirt profile line structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103016191A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101319B (en) * | 2013-04-12 | 2016-12-28 | 陕西柴油机重工有限公司 | The mapping method of the piston skirt variation ellipse cylindrical molded line of marine diesel cylinder diameter |
| CN110439706A (en) * | 2019-10-10 | 2019-11-12 | 潍柴动力股份有限公司 | A kind of piston skirt structure, piston and engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2100493U (en) * | 1991-05-13 | 1992-04-01 | 山东省栖霞活塞厂 | Projected elliptical piston of 95 series diesel engines |
| CN2210257Y (en) * | 1994-01-28 | 1995-10-18 | 山东活塞厂 | High load piston |
| WO2007025529A1 (en) * | 2005-09-01 | 2007-03-08 | Mahle International Gmbh | Two-piece piston for an internal combustion engine |
| US20110041684A1 (en) * | 2006-11-23 | 2011-02-24 | Jochen Kortas | Two-part piston for an internal combustion engine |
| CN202117788U (en) * | 2011-05-27 | 2012-01-18 | 大连滨城活塞制造有限公司 | Piston with steel top and aluminium skirt |
| CN202117789U (en) * | 2011-05-27 | 2012-01-18 | 大连滨城活塞制造有限公司 | Piston structure of steel head iron skirt |
-
2012
- 2012-11-23 CN CN2012104813435A patent/CN103016191A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2100493U (en) * | 1991-05-13 | 1992-04-01 | 山东省栖霞活塞厂 | Projected elliptical piston of 95 series diesel engines |
| CN2210257Y (en) * | 1994-01-28 | 1995-10-18 | 山东活塞厂 | High load piston |
| WO2007025529A1 (en) * | 2005-09-01 | 2007-03-08 | Mahle International Gmbh | Two-piece piston for an internal combustion engine |
| US20110041684A1 (en) * | 2006-11-23 | 2011-02-24 | Jochen Kortas | Two-part piston for an internal combustion engine |
| CN202117788U (en) * | 2011-05-27 | 2012-01-18 | 大连滨城活塞制造有限公司 | Piston with steel top and aluminium skirt |
| CN202117789U (en) * | 2011-05-27 | 2012-01-18 | 大连滨城活塞制造有限公司 | Piston structure of steel head iron skirt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101319B (en) * | 2013-04-12 | 2016-12-28 | 陕西柴油机重工有限公司 | The mapping method of the piston skirt variation ellipse cylindrical molded line of marine diesel cylinder diameter |
| CN110439706A (en) * | 2019-10-10 | 2019-11-12 | 潍柴动力股份有限公司 | A kind of piston skirt structure, piston and engine |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130403 |