WO1995024575B1 - Wrist pin for a two-piece piston - Google Patents
Wrist pin for a two-piece pistonInfo
- Publication number
- WO1995024575B1 WO1995024575B1 PCT/BR1995/000016 BR9500016W WO9524575B1 WO 1995024575 B1 WO1995024575 B1 WO 1995024575B1 BR 9500016 W BR9500016 W BR 9500016W WO 9524575 B1 WO9524575 B1 WO 9524575B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pin
- piston
- end surface
- cylindrical surface
- skirt
- Prior art date
Links
- 210000000707 Wrist Anatomy 0.000 title claims abstract 7
- 238000005452 bending Methods 0.000 claims abstract 4
- 238000010008 shearing Methods 0.000 claims abstract 4
Abstract
Wrist pin for a two-piece piston, presenting a constant cylindrical external surface (41) and an internal surface with an internal diameter, varying throughout the length of the pin (40), in order to produce end portions of the pin having a reduced wall thickness between the outer half of the supporting face of the bosses (50), where there exclusively occur bending moment and shearing force applied by the inertia of the skirt (20) and of the moving assembly (100), the reduction in the wall thickness being obtained by the increase in the internal diameter of the pin (40) at said end portions, through end revolution surfaces (43, 44) with a generatrix being at least substantially straight.
Claims
AMENDED CLAIMS
[received by the International Bureau on 9 October 1995 (09.10.95);
original claim 2 cancelled; original claim 1 amended;
claims 3-6 renumbered as claims 2-5 (2 pages)] l. Wrist pin for a two-piece piston, presenting a tubular shape with a unique external cylindrical surface having end portions supported on respective holes of a skirt portion of the piston and onto which are applied bending and shearing forces produced during the piston operation by the hollow bosses of a piston top portion and by a connecting rod, which are mounted around the pin, and internal surfaces of different diameters, wherein the internal surfaces comprise: a median cylindrical surface (42), which extends radially, so to have its end edges spaced from the respective pin ends and axially external to the pin regions submitted to higher bending and shearing forces produced by the bosses (50) and connecting rod (30); a first and a second end revolution surface (43, 44), with a generatrix at least substantially rectilinear, defining the internal surface of the pin between each end edge of the median cylindrical surface (42) and the adjacent end of the pin (40), each end surface being radially aligned with the respective end portion of the external cylindrical surface (41) of the pin and with the axially outer half of the respective boss of the top portion and defining a respective pin end portion presenting a wall thickness that is reduced in relation to the pin portion presenting the median cylindrical surface (42) and dimensioned to support bending and shearing forces only, resulting from inertia and from lateral radial forces, each first end surface (43), extending from the adjacent end edge of the median cylindrical surface (42). causing an increase in the internal diameter of the pin (40) and having its opposite end edge matching with a second end surface (44) extending towards the adjacent end face (45) of the pin (40).
2. Wrist pin, as in claim 1, wherein each first end surface (43) is provided at a region of the pin (40) that is radially aligned with one of the parts defined by the outer half of the supporting face of the bosses (50) and by the gap between said supporting face and the internal wall (23) of the skirt ( 20 ) , each second end surface ( 44 ) being radially aligned with the supporting service area (E3) of the respective hole of the skirt (21).
3. Wrist pin, as in claim 2, wherein the first end surface (43) is inclined by an angle a that varies from 0 to 45 degrees, from the longitudinal axis of the piston and presents a longitudinal extension (E1) from 0.5 to 3.5 % of the piston diameter, the second end surface (44) being inclined by an angle b, varying from 45 to 90 degrees, from the longitudinal axis of the piston, and a longitudinal extension at least equal to the supporting service area (E3) of the skirt hole (21), and wherein, when a is maximum b is minimum and vice-versa.
4. Wrist pin, as in claim 3, wherein the angle a is approximately 15 degrees and the angle b is approximately 70 degrees.
5. Wrist pin, as in claim 3, wherein the end edge of each second end surface (44) substantially coincides with the external edge of the adjacent end face of the pin (40).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE69506386T DE69506386T2 (en) | 1994-03-08 | 1995-03-06 | AXLE FOR TWO-PIECE PISTON |
| EP95922367A EP0749543B1 (en) | 1994-03-08 | 1995-03-06 | Wrist pin for a two-piece piston |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR9400717A BR9400717A (en) | 1994-03-08 | 1994-03-08 | Articulating pin for two-piece plunger |
| BRPI9400717-9 | 1994-03-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1995024575A1 WO1995024575A1 (en) | 1995-09-14 |
| WO1995024575B1 true WO1995024575B1 (en) | 1995-11-02 |
Family
ID=4058370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BR1995/000016 WO1995024575A1 (en) | 1994-03-08 | 1995-03-06 | Wrist pin for a two-piece piston |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5628577A (en) |
| EP (1) | EP0749543B1 (en) |
| AT (1) | ATE174108T1 (en) |
| BR (1) | BR9400717A (en) |
| DE (1) | DE69506386T2 (en) |
| WO (1) | WO1995024575A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69938741D1 (en) | 1998-12-11 | 2008-06-26 | Cummins Inc | CONNECTED BORE PIPE FOR INCREASED LOADABILITY |
| US6364565B1 (en) * | 2000-02-01 | 2002-04-02 | Caterpillar Inc. | Piston pin assembly |
| US6249995B1 (en) * | 2000-02-15 | 2001-06-26 | David E. Bush | Linkage connector for excavator bucket |
| US6499387B2 (en) | 2001-03-06 | 2002-12-31 | Federal-Mogul World Wide, Inc. | Unified multi-piece piston and method of manufacture |
| EP2014935B2 (en) * | 2005-10-13 | 2016-01-20 | Schaeffler Technologies AG & Co. KG | Radial bearing |
| US7603944B2 (en) * | 2007-04-04 | 2009-10-20 | Federal-Mogul World Wide, Inc. | Piston assembly and wrist pin therefor providing a method of controlling rotation of the wrist pin within corresponding piston pin bores and connecting rod wrist pin bore |
| CN101376062B (en) * | 2007-08-31 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Arthrosis and connecting mechanism thereof |
| US8251543B2 (en) * | 2008-11-22 | 2012-08-28 | Innovative Lighting, Inc. | Interior corner mounting module for rope light system |
| US20100232870A1 (en) * | 2009-03-12 | 2010-09-16 | Delaware Capital Formation, Inc. | Selectively reinforced piston pin |
| EP2855907B1 (en) | 2012-06-04 | 2016-07-27 | Componenta Finland Oy | Piston for internal combustion engine |
| FR3024890B1 (en) * | 2014-08-13 | 2017-03-17 | Safran | PIVOT LINK TYPE ASSEMBLY |
| WO2017154375A1 (en) * | 2016-03-08 | 2017-09-14 | 日立オートモティブシステムズ株式会社 | Piston pin and method for manufacturing piston pin |
| CN107701561A (en) * | 2017-11-10 | 2018-02-16 | 徐州徐工环境技术有限公司 | A kind of refuse compaction equipment and its self-regulation bearing pin |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1772187A (en) * | 1929-03-23 | 1930-08-05 | Gen Motors Corp | Piston pin |
| GB528930A (en) * | 1938-05-20 | 1940-11-11 | Fried Krupp Germaniawerft Ag | Improvements in gudgeon pins |
| US2483674A (en) * | 1945-12-15 | 1949-10-04 | Caterpillar Tractor Co | Piston |
| GB680416A (en) * | 1950-05-31 | 1952-10-01 | Pitner Alfred | Improvements in piston engines |
| US2703264A (en) * | 1950-05-31 | 1955-03-01 | Roulements A Aiguilles Soc Sa | Piston engine |
| US2687930A (en) * | 1952-05-21 | 1954-08-31 | Fairbanks Morse & Co | Piston for internal-combustion engines |
| US4359913A (en) * | 1978-06-22 | 1982-11-23 | Amsted Industries Incorporated | Piston pin assembly |
| DE3210771A1 (en) * | 1982-03-24 | 1983-09-29 | Günter 8543 Hilpoltstein Elsbett | PISTON DRIVE FOR PISTON PISTON INTERNAL COMBUSTION ENGINES, LIKE DIESEL ENGINES AND OTHERS |
| DE3338419A1 (en) * | 1983-10-22 | 1985-05-02 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | PISTON FOR A PISTON PISTON COMBUSTION ENGINE |
| DE3521796A1 (en) * | 1985-06-19 | 1987-01-02 | Kolbenschmidt Ag | PISTON PIN |
| AT388973B (en) * | 1987-08-17 | 1989-09-25 | Avl Verbrennungskraft Messtech | PISTON FOR INTERNAL COMBUSTION ENGINES |
| BR9203180A (en) * | 1992-08-11 | 1994-03-01 | Brasil Compressores Sa | ARTICULATION-BELA-PISTON PIN SET FOR ALTERNATIVE HERMETIC COMPRESSORS AND PROCESS FOR ATTACHING ARTICULATION PIN IN ALTERNATIVE HERMETIC COMPRESSOR PISTON |
-
1994
- 1994-03-08 BR BR9400717A patent/BR9400717A/en not_active IP Right Cessation
- 1994-06-16 US US08/260,556 patent/US5628577A/en not_active Expired - Lifetime
-
1995
- 1995-03-06 WO PCT/BR1995/000016 patent/WO1995024575A1/en active IP Right Grant
- 1995-03-06 DE DE69506386T patent/DE69506386T2/en not_active Expired - Fee Related
- 1995-03-06 EP EP95922367A patent/EP0749543B1/en not_active Expired - Lifetime
- 1995-03-06 AT AT95922367T patent/ATE174108T1/en not_active IP Right Cessation
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