CN103032196B - Combined piston with built-in piston pin - Google Patents
Combined piston with built-in piston pin Download PDFInfo
- Publication number
- CN103032196B CN103032196B CN201210558189.7A CN201210558189A CN103032196B CN 103032196 B CN103032196 B CN 103032196B CN 201210558189 A CN201210558189 A CN 201210558189A CN 103032196 B CN103032196 B CN 103032196B
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- piston
- key seat
- pin
- wrist pin
- skirt
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Abstract
The invention discloses a combined piston with a built-in piston pin. A piston head (1), an upper pin seat (2), a bushing (3), a piston pin (4) and a lower pin seat (5) are connected in sequence through four squarely and uniformly arranged tightening bolts (11); the upper pin seat (2), the bushing (3), the piston pin (4), the lower pin seat (5) and a bolt (6) are arranged from top to bottom in sequence and are positioned in a piston skirt (7) in a built-in manner; no pin holes are formed in the piston skirt (7); the outer circle of the skirt part forms a complete drum shape; and the piston skirt (7) is connected with the lower pin seat (5) through the bolt (6). The piston pin is attached to the piston in the entire length, so that the stress and the specific pressure of the piston are reduced; the volume of a cooling oil cavity formed by the upper pin seat and the piston head is extremely large, so that the cooling effect of the piston is enhanced; the connecting rod is connected with the piston pin by using the bolt, so that a friction pair is reduced; and the deflection size of the piston is increased, the attachment area of the connecting rod and the piston pin is increased, and the stress of the connecting rod is reduced.
Description
Technical field
The invention belongs to technical field of internal combustion engines, be specifically related to the built-in combined piston of a kind of wrist pin.
Background technique
The friction pair that partners in piston pin hole is filled at conventional piston pin two ends, and wrist pin intermediate portion inserts the friction pair that partners in connecting rod small end.
Between piston pin boss, the shelves of opening of installing connecting rods reduce piston pin boss and wrist pin laminating length, thereby increased piston pin boss specific pressure, cause piston pin hole distortion, cracking etc.
Summary of the invention
The present invention is exactly in order to solve the shelves of opening of installing connecting rods between conventional piston key seat, piston pin boss and wrist pin laminating length is reduced, thereby increased piston pin boss specific pressure, causes the problem of piston pin hole distortion, cracking etc.
Technological scheme of the present invention:
The combined piston that wrist pin is built-in, comprises piston head, piston skirt, upper key seat, lower key seat, lining, piston head, upper key seat, lining, wrist pin, lower key seat, and the bolt that tightens being evenly arranged by 4 quadrates connects successively; Wherein, upper key seat, lower key seat and piston head, locate by locating stud;
Wrist pin is positioned at combined piston with built-in form; Tapped hole is positioned on wrist pin, and wrist pin is connected by bolt with connecting rod; In upper key seat, be provided with semi-circular lining, lining and upper key seat are located by retention Hp; The diaphragm of piston head, upper key seat and upper key seat, forms cooling oil chamber; On diaphragm, be provided with oil outlet and the oil inlet hole of cooling oil chamber; In lining, be provided with wrist pin, wrist pin is connected with connecting rod by 2 tapped holes in its lower semi-circle;
Piston head upper surface is provided with a sphere depression, piston head cylindrical side is provided with 3 road ring grooves, bottom one ring groove is positioned at piston head cylindrical side bottom, seal ring is positioned at this ring groove outside, road with close-fitting form, piston skirt is positioned at again seal ring outside, and upper key seat is positioned at below seal ring and piston head;
Upper key seat, lining, wrist pin, lower key seat, bolt, be from top to bottom arranged in order, and with built-in form, is arranged in piston skirt, and piston skirt is positioned at their outside, do not establish pin-and-hole on piston skirt, and skirt section cylindrical is complete round barrel shape; Piston skirt and lower key seat, be bolted.
Beneficial effect of the present invention:
1. wrist pin is built-in, has formed pin embedding structure, has reduced piston pin hole stressed, has reduced crankcase abandonment pressure and the air leakage of two stroke engine, makes crankcase keep lower pressure;
2. wrist pin is built-in, has reduced from the enter oil level of piston cavity of pin-and-hole matching gap, has reduced engine oil consumption;
3. the mounting type of wrist pin, makes needn't arrange pin-and-hole on piston skirt, and guaranteed the integrity of piston skirt, skirt section cylindrical forms complete round barrel shape;
4. wrist pin is all fitted with piston in whole length, has increased the fitting area of piston and wrist pin, has reduced piston stress and specific pressure;
5. go up the cooling oil chamber volume that key seat and piston head form, be far longer than conventional aluminum piston or forging steel piston, strengthened cooling effect;
6. piston skirt can be that casting aluminium material can be also forged steel material, meets various engines demand;
7. compare with conventional linkage, connecting rod is connected with bolt with wrist pin, has reduced by a friction pair, has improved connecting rod stressed;
8. descend key seat not stress, piston is opened grade size and is increased, and connecting rod small end width increases, and to connecting rod, has abdicated enough spaces, has increased connecting rod and wrist pin fitting area, has reduced the suffered stress of connecting rod small end, has reduced connecting rod stressed.
Accompanying drawing explanation
The present invention has 4 width accompanying drawings,
Fig. 1 is elevation cross-sectional view of the present invention, is also structural representation of the present invention;
Fig. 2 is face upwarding section of the present invention;
Fig. 3 is cooling oil chamber structural representation of the present invention;
Fig. 4 is upper pin structure schematic diagram of the present invention.
Each mark of accompanying drawing represents respectively:
1-piston head
The upper key seat of 2-
3-lining
4-wrist pin
Key seat under 5-
6-bolt
7-piston skirt
8-seal ring
9-cooling oil chamber
10-tapped hole
11-tightens bolt
12-oil outlet
13-oil inlet hole
14-locating stud
15-diaphragm (upper key seat)
Embodiment
The combined piston that wrist pin is built-in, comprises piston head, piston skirt, upper key seat, lower key seat, lining, piston head, upper key seat, lining, wrist pin, lower key seat, and the bolt that tightens being evenly arranged by 4 quadrates connects successively; Wherein, upper key seat, lower key seat and piston head, locate by locating stud;
Wrist pin is positioned at combined piston with built-in form; Tapped hole is positioned on wrist pin, and wrist pin is connected by bolt with connecting rod; In upper key seat, be provided with semi-circular lining, lining and upper key seat are located by retention Hp; The diaphragm of piston head, upper key seat and upper key seat, forms cooling oil chamber; On diaphragm, be provided with oil outlet and the oil inlet hole of cooling oil chamber; In lining, be provided with wrist pin, wrist pin is connected with connecting rod by 2 tapped holes in its lower semi-circle;
Piston head upper surface is provided with a sphere depression, piston head cylindrical side is provided with 3 road ring grooves, bottom one ring groove is positioned at piston head cylindrical side bottom, seal ring is positioned at this ring groove outside, road with close-fitting form, piston skirt is positioned at again seal ring outside, and upper key seat is positioned at below seal ring and piston head;
Upper key seat, lining, wrist pin, lower key seat, bolt, be from top to bottom arranged in order, and with built-in form, is arranged in piston skirt, and piston skirt is positioned at their outside, do not establish pin-and-hole on piston skirt, and skirt section cylindrical is complete round barrel shape; Piston skirt and lower key seat, be bolted.
To specific works flow process of the present invention, be described further below.
When as installed, first with bolt, piston head, upper key seat, lining, pin, lower key seat are installed, finally with bolt, seal ring and piston skirt are installed.The mounting type of wrist pin makes needn't arrange pin-and-hole on piston skirt, and skirt section cylindrical forms complete round barrel shape.Wrist pin forms built-in form.
The built-in crankcase abandonment pressure that has reduced engine oil consumption and two stroke engine of wrist pin.Wrist pin is all fitted with piston in whole length, has reduced piston stress and specific pressure.It is very large that upper key seat and piston head have formed cooling oil chamber volume, strengthened piston cooling effect, and connecting rod is connected with bolt with wrist pin, reduced by a friction pair.Piston is opened grade size and is increased the increase of connecting rod small end width, has reduced connecting rod small end stressed.
Claims (1)
1. the combined piston that wrist pin is built-in, comprise piston head (1), piston skirt (7), upper key seat (2), lower key seat (5), lining (3), it is characterized in that, piston head (1), upper key seat (2), lining (3), wrist pin (4), lower key seat (5), the bolt (11) that tightens being evenly arranged by 4 quadrates connects successively; Wherein, upper key seat (2), lower key seat (5) and piston head (1), locate by locating stud (14); Wrist pin (4) is positioned at combined piston with built-in form; Tapped hole (10) is positioned at wrist pin (4), and wrist pin (4) is connected by bolt (6) with connecting rod; In upper key seat (2), be provided with semi-circular lining (3), lining (3) is located by retention Hp with upper key seat (2); The diaphragm (15) of piston head (1), upper key seat (2) and upper key seat (2), forms cooling oil chamber (9); Diaphragm (15) is upper, is provided with oil outlet (12) and the oil inlet hole (13) of cooling oil chamber (9); In lining (3), be provided with wrist pin (4), wrist pin (4) is connected with connecting rod by 2 tapped holes (10) in its lower semi-circle; Piston head (1) upper surface is provided with a sphere depression, piston head (1) cylindrical side is provided with 3 road ring grooves, bottom one ring groove is positioned at piston head (1) cylindrical side bottom, seal ring (8) is positioned at bottom one ring groove outside with close-fitting form, piston skirt (7) is positioned at again seal ring (8) outside, and upper key seat (2) is positioned at seal ring (8) and piston head (1) below; Upper key seat (2), lining (3), wrist pin (4), lower key seat (5), bolt (6), from top to bottom be arranged in order, with built-in form, be arranged in piston skirt (7), it is the outside that piston skirt (7) is positioned at key seat, lining, wrist pin, lower key seat, bolt, piston skirt is not established pin-and-hole on (7), and skirt section cylindrical is complete round barrel shape; Piston skirt (7) and lower key seat (5), connect by bolt (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210558189.7A CN103032196B (en) | 2012-12-21 | 2012-12-21 | Combined piston with built-in piston pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210558189.7A CN103032196B (en) | 2012-12-21 | 2012-12-21 | Combined piston with built-in piston pin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103032196A CN103032196A (en) | 2013-04-10 |
| CN103032196B true CN103032196B (en) | 2014-09-24 |
Family
ID=48019491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210558189.7A Active CN103032196B (en) | 2012-12-21 | 2012-12-21 | Combined piston with built-in piston pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103032196B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236486A (en) * | 2018-11-02 | 2019-01-18 | 滨州渤海活塞有限公司 | Internal combustion engine novel steel pistons and internal combustion engine |
| US11156186B2 (en) * | 2019-05-02 | 2021-10-26 | Woodward, Inc. | Multiple piece piston |
| CN112901365B (en) * | 2021-02-10 | 2022-06-21 | 李斯特技术中心（上海）有限公司 | Combined type piston and engine |
| CN114645798B (en) * | 2022-03-14 | 2023-02-28 | 北京理工大学 | Piston pin hole bush structure |
| CN115256286A (en) * | 2022-09-13 | 2022-11-01 | 成都银河动力有限公司 | Combined piston oil duct oil inlet hole positioning pin assembly and assembling method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2483521A1 (en) * | 1980-05-30 | 1981-12-04 | Semt | PISTON OF ALTERNATIVE PISTON MACHINE, ESPECIALLY OF INTERNAL COMBUSTION ENGINE |
| CN2138701Y (en) * | 1992-10-08 | 1993-07-21 | 铁道部大连机车车辆工厂 | Steel top iron skirt combined piston of diesel engine |
| CN2245127Y (en) * | 1995-06-06 | 1997-01-15 | 成都铁路局重庆配件厂 | Steel head iron skirt combined piston for diesel engine |
| DE19526449C1 (en) * | 1995-07-20 | 1997-02-27 | Daimler Benz Ag | Two=part piston for IC engine |
| DE19642109A1 (en) * | 1996-10-12 | 1998-04-16 | Mahle Gmbh | Built piston |
| CN2377402Y (en) * | 1999-06-01 | 2000-05-10 | 叶诚钧 | Ceramic and metal composite piston |
| DE102004057284A1 (en) * | 2004-11-26 | 2006-06-14 | Fev Motorentechnik Gmbh | Lightweight piston for thermally highly stressed pistons |
| CN202611913U (en) * | 2012-04-28 | 2012-12-19 | 中国北车集团大连机车研究所有限公司 | Combined piston connecting structure for diesel engine |
-
2012
- 2012-12-21 CN CN201210558189.7A patent/CN103032196B/en active Active
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| Publication number | Publication date |
|---|---|
| CN103032196A (en) | 2013-04-10 |
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