US20050155451A1 - Connecting rod and method for manufacturing the same - Google Patents
Connecting rod and method for manufacturing the same Download PDFInfo
- Publication number
- US20050155451A1 US20050155451A1 US10/846,583 US84658304A US2005155451A1 US 20050155451 A1 US20050155451 A1 US 20050155451A1 US 84658304 A US84658304 A US 84658304A US 2005155451 A1 US2005155451 A1 US 2005155451A1
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- US
- United States
- Prior art keywords
- connecting rod
- rod eye
- bearing shell
- disposed
- eye
- 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.)
- Abandoned
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims 3
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/08—Attachment of brasses, bushes or linings to the bearing housing
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/1065—Grooves on a bearing surface for distributing or collecting the liquid
-
- 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
-
- 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
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
-
- 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
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/10—Force connections, e.g. clamping
-
- 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
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/50—Positive connections
-
- 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
- F16C2360/00—Engines or pumps
- F16C2360/22—Internal combustion engines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2142—Pitmans and connecting rods
Definitions
- the invention concerns a connecting rod and a method for producing a connecting rod in accordance with the independent claims.
- the structure may be a uniform pattern which can be adapted to the loads which occur and which can be reproduced during manufacture.
- the structure can be adapted to working loads in a simple manner by changing the depth of the depressions and the height of the elevations.
- the depressions with sideward elevations are suitably designed as furrows.
- the furrows may advantageously be straight or cross each other.
- the furrows may also be wavy.
- the depressions may advantageously be formed as closed pockets. As viewed from above, the pockets may advantageously have an elongated or round shape.
- the inner surface of a bearing shell and/or the surface of a component disposed in the bearing shell advantageously has/have a structure which is formed from depressions only.
- the depressions act as micro-pressure chambers which facilitate hydraulic lubrication to reduce friction between the sliding partners.
- the production of the connecting rod can be facilitated by structuring the surface of a connecting rod eye using a laser.
- the laser structuring simultaneously permits good adaptation of the structure to the working loads.
- the elevations are formed by displaced melt produced during processing at the structure edges, which is generated through thermal processing.
- the height of the elevations can be adjusted via the displaced melt volume.
- the melt volume can be varied by the processing parameters, i.e., for example, via the advance speed or via the laser parameters, i.e., for example, through adjustment of the power or the pulse duration.
- Laser processing facilitates changes to the design of the structure, such as the surface portion of pocket structures or the angles of intersection of crossing structures.
- the height and the width of the elevations influence the adhesion of the bearing shell in the connecting rod eye and can also be easily varied during laser processing.
- FIG. 1 shows a schematic perspective view of a connecting rod
- FIG. 2 shows a section through a large connecting rod eye with bearing shell disposed therein, and a crankshaft
- FIG. 3 shows the profile of a surface of a connecting rod eye along the line III-III in FIG. 4 ;
- FIG. 4 shows a top view onto a section of a surface of a connecting rod eye
- FIG. 5 shows the profile of the surface of a connecting rod eye along the line V-V in FIG. 6 ;
- FIG. 6 shows a section of a top view onto the surface of a connecting rod eye
- FIGS. 7 shows a schematic view from above of first surface structures
- FIGS. 8 shows a schematic view from above of second surface structures
- FIGS. 9 shows a schematic view from above of third surface structures
- FIGS. 10 shows a schematic view from above of fourth surface structures
- FIGS. 11 shows a schematic view from above of fifth surface structures
- FIGS. 12 shows a schematic view from above of sixth surface structures.
- the connecting rod 1 has a small connecting rod eye 2 and a large connecting rod eye 3 .
- a piston pin is conventionally disposed in the small connecting rod eye 2 and the crankshaft is disposed in the large connecting rod eye 3 .
- a bearing shell 4 is disposed in the small connecting rod eye 2
- a bearing shell 5 is disposed in the large connecting rod eye 3 .
- the bore surfaces 12 and 13 of the connecting rod eyes 2 and 3 have structures 6 and 7 .
- the structures 6 and 7 increase the adhesion of the bearing shells 4 and 5 .
- the outer surfaces of the bearing shells 4 , 5 which are in contact with the bore surfaces 12 , 13 may have corresponding structures.
- the friction between the inner side of the bearing shells 4 and 5 and the piston pin or the crankshaft should be minimized.
- the inner surface 21 of the bearing shell 4 has a structure 22 and the inner surface 18 of the bearing shell 5 has a structure 20 .
- a nose 15 may be disposed on the outer periphery of a bearing shell, in addition to the structure 6 , 7 , as exemplarily shown in the bearing shell 5 of FIG. 2 .
- the nose 15 extends radially outwardly at the outer periphery of the bearing shell 5 .
- the connecting rod eye 3 of the connecting rod 1 has a holding groove 14 into which the nose 15 projects.
- the surface 13 of the connecting rod eye 3 additionally has a structure (not shown in FIG. 2 ).
- the crankshaft 16 is disposed in the bearing shell 5 and rotates in the direction of the arrow 17 .
- the friction between bearing shell 5 and connecting rod eye 3 should be as large as possible to rigidly hold the bearing shell 5 in the connecting rod eye 3
- the friction between the bearing shell 5 and the crankshaft 16 should be as small as possible.
- the inner surface 18 of the bearing shell 5 has a structure 20 (shown in FIG. 1 ).
- a structure corresponding to the structure 20 may be provided on the outer surface 19 of the crankshaft 16 rather than on the inner surface 18 .
- FIGS. 3 and 4 show, in an enlarged scale, a structure 37 of a surface 39 which may be the surface 12 , 13 of a connecting rod eye 2 , 3 .
- the structure 37 may be provided in the small connecting rod eye 2 and/or in the large connecting rod eye 3 .
- the structure 37 is introduced into the surface 39 which has a basic structure 23 .
- the structure 37 is advantageously produced with a laser.
- the basic structure 23 may e.g. be a cross structure produced through honing.
- the basic structure 23 may also consist of peripheral furrows produced during spindling of the surface 39 .
- Elongated pockets 11 are introduced into the basic structure 23 at regular intervals which are formed by a depression 8 whose periphery is delimited by a circumferential elevation 9 .
- the depressions 8 have a depth a relative to the surface 39 while the elevations 9 extend beyond the surface 39 by a height b.
- the elevations 9 have a width c and the depressions 8 have a width d.
- the depth a and the height b advantageously are approximately up to 50 ⁇ m.
- the width c, d is advantageously selected to be ⁇ 50 ⁇ m.
- FIGS. 5 and 6 show an embodiment of a structure 38 of the large connecting rod eye 3 which may be introduced into the surface 12 , 13 of the connecting rod eye 2 , 3 and is formed by round pockets 10 .
- the round pockets 10 are suitably uniformly introduced into the surface 40 .
- the round pockets 10 have a circular depression 8 whose outer periphery is also surrounded by a circular elevation 9 .
- the round pockets 10 are also introduced into a surface 40 having a basic structure 23 .
- FIGS. 7 through 12 show examples of an arrangement of a structure on a surface.
- the double arrow 36 thereby designates the peripheral direction of the connecting rod eye or of the bearing shell.
- the pockets 25 are disposed in a regular pattern.
- the pockets 25 may have a depression 8 and an elevation 9 , in correspondence with the round pockets 10 shown in FIGS. 5 and 6 .
- the structure 24 is suitably introduced on the bore surface 12 of the small connecting rod eye 2 or the bore surface 13 of the large connecting rod eye 3 . It may also be appropriate to provide pockets 25 without elevations 9 .
- Such pockets reduce the friction between the sliding partners, since they are used as a lubricant reservoir thereby permitting full hydrodynamic lubrication.
- the pockets simultaneously act as micro-pressure chambers.
- Pockets 25 of such a design are suitably disposed on the inner surface 21 of the bearing shell 4 and/or on the outer periphery of a piston pin and on the inner surface 18 of the bearing shell 5 and/or the outer surface 19 of the crankshaft 16 .
- FIG. 8 shows elongated pockets 27 which extend approximately in a peripheral direction.
- the elongated pockets 27 are disposed at regular intervals and form a structure 26 .
- the structure 28 of FIG. 9 is formed by elongated pockets 29 which extend approximately transversely to the peripheral direction. It may also be suitable to provide elongated pockets which subtend an angle of between 0° and 90° with respect to the peripheral direction.
- the structures 26 and 28 may be disposed on the inner surface 18 of the bearing shell 5 or the outer surface 19 of the crankshaft 16 and/or the inner surface 21 of the bearing shell 4 or the outer surface of a piston pin.
- the pockets 27 and 29 are thereby suitably formed only as depressions.
- the pockets 27 and 29 may each be delimited at their outer periphery by an elevation 9 . Pockets 27 and 29 of this design increase friction and are preferably disposed on the surface 12 of the connecting rod eye 2 or the surface 13 of the connecting rod eye 3 .
- the structure 30 of FIG. 10 is formed by crossing furrows 31 which are each delimited by elevations 9 .
- the furrows 31 have an angle of intersection a.
- the structure 30 is suitably formed on a surface 12 , 13 of a connecting rod eye 2 , 3 .
- the adhesion of the structure 30 may be influenced by varying the angle of intersection ⁇ .
- FIG. 11 shows a structure 32 having wavy furrows 33 .
- the outer periphery of the furrows 33 also comprises elevations 9 .
- the furrows 33 are suitably disposed on the surfaces 12 and 13 of the connecting rod eyes 2 and 3 .
- FIG. 12 shows a structure 34 with furrows 35 which extend parallel to each other.
- the furrows 35 are disposed approximately perpendicularly to the peripheral direction in FIG.
- the furrows 35 may suitably subtend an angle of less than 90° with respect to the peripheral direction.
- the furrows 35 may also have elevations 9 at their outer periphery to increase the friction between connecting rod eye 2 , 3 and bearing shell 4 , 5 .
- a connecting rod 1 is advantageously produced by structuring the surface 12 , 13 of one or both connecting rod eyes 2 , 3 using a laser.
- the surface 12 , 13 is advantageously fine machined before laser structuring thereby producing a basic structure 23 into which the structure is introduced.
- the adhesion of a structure 6 , 7 on the surface 12 , 13 of a connecting rod eye 2 , 3 may be greatly influenced by the surface portion.
- the adhesion can be changed by varying the angle of intersection ⁇ .
- the height b of the elevations 9 and the width of the elevations 9 have an influence on the adhesion of all structures.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Joining Of Building Structures In Genera (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
A connecting rod (1) has a small connecting rod eye (2) and a large connecting rod eye (3). A bearing shell (4, 5) is disposed in at least one connecting rod eye (2, 3), wherein the bearing shell (4, 5) is held in the connecting rod eye (2, 3) for secure mutual rotation therewith. To obtain good adhesion of the bearing shell (4, 5) in the connecting rod eye (2, 3), the bore surface (12, 13) in one connecting rod eye (2, 3) and/or the outer surface of a bearing shell (4, 5) has/have a structure (6, 7, 24, 26, 28, 30, 32, 34, 37, 38), wherein the structure (6, 7, 24, 26, 28, 30, 32, 34, 37, 38) is formed by elevations (9), the elevations (9) delimiting the outer periphery of depressions (8). In a method for producing a connecting rod (1) comprising at least one connecting rod eye (2, 3) with a structured surface (12, 13), wherein a bearing shell (4, 5) is disposed in the connecting rod eye (2, 3) after structuring of the surface, the surface (12, 13) is structured with a laser.
Description
- This application is related to EP 02 025 788.7 filed Nov. 16, 2002, the entire disclosure of which is hereby incorporated by reference.
- The invention concerns a connecting rod and a method for producing a connecting rod in accordance with the independent claims.
- The book “Jahrbuch Schleifen, Honen, Läppen und Polieren” (annual grinding, honing, lapping and polishing) by H.-W. Hoffmeister and H.-K. Tönshoff (publisher), Vulkan-Verlag Essen, 2002, pages 396 to 408 discloses a holding groove on a connecting rod eye into which a nose, formed on the bearing shell, projects. The surface of the connecting rod eye is conventionally honed to improve the tight fit of the bearing shell.
- It is the underlying purpose of the invention to produce a connecting rod of this type, which provides sufficient fixation of the bearing shell in the connecting rod eye even under high loads, and to propose a method for producing a connecting rod having a long service life.
- This object is achieved with a connecting rod having the features of the independent claims.
- Good fixation of a bearing shell in a connecting rod eye is ensured by providing a surface structure in a connecting rod eye with depressions whose outer periphery is delimited by elevations. The elevations on the structured edges of the structure anchor the bearing shell in the connecting rod eye. The structure may be a uniform pattern which can be adapted to the loads which occur and which can be reproduced during manufacture. The structure can be adapted to working loads in a simple manner by changing the depth of the depressions and the height of the elevations.
- The depressions with sideward elevations are suitably designed as furrows. The furrows may advantageously be straight or cross each other. The furrows may also be wavy. The depressions may advantageously be formed as closed pockets. As viewed from above, the pockets may advantageously have an elongated or round shape. The inner surface of a bearing shell and/or the surface of a component disposed in the bearing shell advantageously has/have a structure which is formed from depressions only. The depressions act as micro-pressure chambers which facilitate hydraulic lubrication to reduce friction between the sliding partners.
- The production of the connecting rod can be facilitated by structuring the surface of a connecting rod eye using a laser. The laser structuring simultaneously permits good adaptation of the structure to the working loads. The elevations are formed by displaced melt produced during processing at the structure edges, which is generated through thermal processing. The height of the elevations can be adjusted via the displaced melt volume. The melt volume can be varied by the processing parameters, i.e., for example, via the advance speed or via the laser parameters, i.e., for example, through adjustment of the power or the pulse duration. Laser processing facilitates changes to the design of the structure, such as the surface portion of pocket structures or the angles of intersection of crossing structures. The height and the width of the elevations influence the adhesion of the bearing shell in the connecting rod eye and can also be easily varied during laser processing.
- Embodiments of the invention are explained below with reference to the drawing.
-
FIG. 1 shows a schematic perspective view of a connecting rod; -
FIG. 2 shows a section through a large connecting rod eye with bearing shell disposed therein, and a crankshaft; -
FIG. 3 shows the profile of a surface of a connecting rod eye along the line III-III inFIG. 4 ; -
FIG. 4 shows a top view onto a section of a surface of a connecting rod eye; -
FIG. 5 shows the profile of the surface of a connecting rod eye along the line V-V inFIG. 6 ; -
FIG. 6 shows a section of a top view onto the surface of a connecting rod eye; - FIGS. 7 shows a schematic view from above of first surface structures;
- FIGS. 8 shows a schematic view from above of second surface structures;
- FIGS. 9 shows a schematic view from above of third surface structures;
- FIGS. 10 shows a schematic view from above of fourth surface structures;
- FIGS. 11 shows a schematic view from above of fifth surface structures; and
- FIGS. 12 shows a schematic view from above of sixth surface structures.
- The connecting
rod 1, schematically shown inFIG. 1 , has a small connectingrod eye 2 and a large connectingrod eye 3. For use in a combustion engine, a piston pin is conventionally disposed in the smallconnecting rod eye 2 and the crankshaft is disposed in the large connectingrod eye 3. Abearing shell 4 is disposed in the small connectingrod eye 2, and abearing shell 5 is disposed in the large connectingrod eye 3. To rigidly fix thebearing shells rod eyes bore surfaces rod eyes bearing shells bore surfaces bearing shells bore surfaces bearing shells inner surface 21 of thebearing shell 4 has astructure 22 and theinner surface 18 of thebearing shell 5 has astructure 20. - To fix a
bearing shell rod eye nose 15 may be disposed on the outer periphery of a bearing shell, in addition to the structure 6, 7, as exemplarily shown in thebearing shell 5 ofFIG. 2 . Thenose 15 extends radially outwardly at the outer periphery of thebearing shell 5. In the region of thenose 15, the connectingrod eye 3 of the connectingrod 1 has aholding groove 14 into which thenose 15 projects. Thesurface 13 of the connectingrod eye 3 additionally has a structure (not shown inFIG. 2 ). The crankshaft 16 is disposed in thebearing shell 5 and rotates in the direction of thearrow 17. While the friction betweenbearing shell 5 and connectingrod eye 3 should be as large as possible to rigidly hold thebearing shell 5 in the connectingrod eye 3, the friction between thebearing shell 5 and the crankshaft 16 should be as small as possible. Towards this end, theinner surface 18 of thebearing shell 5 has a structure 20 (shown inFIG. 1 ). A structure corresponding to thestructure 20 may be provided on theouter surface 19 of the crankshaft 16 rather than on theinner surface 18. -
FIGS. 3 and 4 show, in an enlarged scale, astructure 37 of asurface 39 which may be thesurface rod eye structure 37 may be provided in the small connectingrod eye 2 and/or in the large connectingrod eye 3. Thestructure 37 is introduced into thesurface 39 which has abasic structure 23. Thestructure 37 is advantageously produced with a laser. Thebasic structure 23 may e.g. be a cross structure produced through honing. Thebasic structure 23 may also consist of peripheral furrows produced during spindling of thesurface 39. Elongatedpockets 11 are introduced into thebasic structure 23 at regular intervals which are formed by adepression 8 whose periphery is delimited by acircumferential elevation 9. Thedepressions 8 have a depth a relative to thesurface 39 while theelevations 9 extend beyond thesurface 39 by a height b. Theelevations 9 have a width c and thedepressions 8 have a width d. The depth a and the height b advantageously are approximately up to 50 μm. The width c, d is advantageously selected to be ≦50 μm. -
FIGS. 5 and 6 show an embodiment of astructure 38 of the large connectingrod eye 3 which may be introduced into thesurface rod eye surface 40. The round pockets 10 have acircular depression 8 whose outer periphery is also surrounded by acircular elevation 9. The round pockets 10 are also introduced into asurface 40 having abasic structure 23. -
FIGS. 7 through 12 show examples of an arrangement of a structure on a surface. Thedouble arrow 36 thereby designates the peripheral direction of the connecting rod eye or of the bearing shell. In thestructure 24 shown inFIG. 7 , thepockets 25 are disposed in a regular pattern. Thepockets 25 may have adepression 8 and anelevation 9, in correspondence with the round pockets 10 shown inFIGS. 5 and 6 . Thestructure 24 is suitably introduced on thebore surface 12 of the small connectingrod eye 2 or thebore surface 13 of the large connectingrod eye 3. It may also be appropriate to providepockets 25 withoutelevations 9. Such pockets reduce the friction between the sliding partners, since they are used as a lubricant reservoir thereby permitting full hydrodynamic lubrication. The pockets simultaneously act as micro-pressure chambers.Pockets 25 of such a design are suitably disposed on theinner surface 21 of the bearingshell 4 and/or on the outer periphery of a piston pin and on theinner surface 18 of the bearingshell 5 and/or theouter surface 19 of the crankshaft 16. -
FIG. 8 shows elongatedpockets 27 which extend approximately in a peripheral direction. The elongated pockets 27 are disposed at regular intervals and form astructure 26. Thestructure 28 ofFIG. 9 is formed byelongated pockets 29 which extend approximately transversely to the peripheral direction. It may also be suitable to provide elongated pockets which subtend an angle of between 0° and 90° with respect to the peripheral direction. Thestructures inner surface 18 of the bearingshell 5 or theouter surface 19 of the crankshaft 16 and/or theinner surface 21 of the bearingshell 4 or the outer surface of a piston pin. Thepockets pockets elevation 9.Pockets surface 12 of the connectingrod eye 2 or thesurface 13 of the connectingrod eye 3. - The
structure 30 ofFIG. 10 is formed by crossingfurrows 31 which are each delimited byelevations 9. Thefurrows 31 have an angle of intersection a. Thestructure 30 is suitably formed on asurface rod eye structure 30 may be influenced by varying the angle of intersection α.FIG. 11 shows astructure 32 having wavy furrows 33. The outer periphery of thefurrows 33 also compriseselevations 9. Thefurrows 33 are suitably disposed on thesurfaces rod eyes FIG. 12 shows astructure 34 withfurrows 35 which extend parallel to each other. Thefurrows 35 are disposed approximately perpendicularly to the peripheral direction inFIG. 12 . Thefurrows 35 may suitably subtend an angle of less than 90° with respect to the peripheral direction. Thefurrows 35 may also haveelevations 9 at their outer periphery to increase the friction between connectingrod eye shell - A connecting
rod 1 is advantageously produced by structuring thesurface rod eyes surface basic structure 23 into which the structure is introduced. Forpocket structures surface rod eye cross structures 30, the adhesion can be changed by varying the angle of intersection α. The height b of theelevations 9 and the width of theelevations 9 have an influence on the adhesion of all structures.
Claims (10)
1. A connecting rod comprising:
a first end having a small connecting rod eye;
a second end cooperating with and spaced apart from said first end, said second end having a large connecting rod eye; and
at least one bearing shell disposed in said small and/or said large connecting rod eye for secure mutual rotation therewith, wherein at least one of an inner surface of said small and/or said large connecting rod eye and an outer surface of said at least one bearing shell has a structure, said structure having elevations adjacent to and delimiting depressions.
2. The connecting rod of claim 1 , wherein said depressions are formed as furrows.
3. The connecting rod of claim 2 , wherein said furrows are disposed in straight lines.
4. The connecting rod of claim 2 , wherein said furrows are disposed to cross.
5. The connecting rod of claim 2 , wherein said furrows are wavy.
6. The connecting rod of claim 1 , wherein said depressions are formed as closed pockets.
7. The connecting rod of claim 6 , wherein, as viewed from above, said pockets have an elongated or round shape.
8. The connecting rod of claim 1 , wherein an inner surface of said bearing shell and/or an outer surface of a component disposed in said bearing shell has a structure which is only formed from depressions.
9. A method for producing a connecting rod, the connecting rod having a first end defining a small connecting rod eye, a second end cooperating with and spaced apart from said first end, said second end defining a large connecting rod eye, and at least one bearing shell disposed in said small and/or said large connecting rod eye for secure mutual rotation therewith, the method comprising the step of:
structuring at least one of an inner surface of said small and/or said large connecting rod eye and an outer surface of said at least one bearing shell, said structuring having elevations adjacent to and delimiting depressions.
10. The method of claim 9 , wherein said inner surface is structured by a laser.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02025788A EP1420177B1 (en) | 2002-11-16 | 2002-11-16 | Connecting rod and method for manufacturing the same |
EP02025788.7 | 2002-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050155451A1 true US20050155451A1 (en) | 2005-07-21 |
Family
ID=32116276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/846,583 Abandoned US20050155451A1 (en) | 2002-11-16 | 2004-05-17 | Connecting rod and method for manufacturing the same |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050155451A1 (en) |
EP (1) | EP1420177B1 (en) |
AT (1) | ATE299562T1 (en) |
DE (1) | DE50203628D1 (en) |
ES (1) | ES2241944T3 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090126191A1 (en) * | 2004-11-16 | 2009-05-21 | Mcewan Alan Stephen | Method of manufacturing a connecting rod assembly for an internal combustion engine |
US20100300244A1 (en) * | 2009-05-29 | 2010-12-02 | Cummins Intellectual Properties, Inc. | Anti-rotation bearing assembly and bearing |
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ES2615464A1 (en) * | 2013-06-06 | 2017-06-07 | Mauser-Werke Oberndorf Maschinenbau Gmbh | Bearing assembly and method for producing a bearing assembly |
US20170284454A1 (en) * | 2016-03-31 | 2017-10-05 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for machining a surface of a metal component, and metal component |
CN108240398A (en) * | 2018-03-21 | 2018-07-03 | 济南大学 | A kind of compound Surface Texture friction is secondary |
JP2019027524A (en) * | 2017-07-31 | 2019-02-21 | 大同メタル工業株式会社 | Half-split bearing and sliding bearing |
JP2019218915A (en) * | 2018-06-21 | 2019-12-26 | 日産自動車株式会社 | Double-link type piston crank mechanism of internal combustion engine |
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DE20321769U1 (en) * | 2002-08-02 | 2009-11-26 | Mauser-Werke Oberndorf Maschinenbau Gmbh | surface structuring |
DE102005062522C5 (en) * | 2005-12-19 | 2019-04-04 | Gehring Technologies Gmbh | Method for non-positive connection of the end faces of two machine components for transmitting high torques or shear forces |
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DE102007015958B4 (en) * | 2007-04-03 | 2012-01-12 | Daimler Ag | Force and / or frictional connection |
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JP5621513B2 (en) * | 2010-11-02 | 2014-11-12 | 大豊工業株式会社 | Plain bearing |
DE102011006498A1 (en) * | 2011-03-31 | 2012-10-04 | Federal-Mogul Nürnberg GmbH | Defined oil holding holes in bolt holes |
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JP6577003B2 (en) * | 2017-11-17 | 2019-09-18 | 大同メタル工業株式会社 | Half bearing and plain bearing |
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Cited By (19)
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US8079145B2 (en) * | 2004-11-16 | 2011-12-20 | Mahle Technology, Inc. | Method of manufacturing a connecting rod assembly for an internal combustion engine |
US8484844B2 (en) | 2004-11-16 | 2013-07-16 | Mahle Industries, Incorporated | Method of manufacturing a connecting rod assembly for an internal combustion engine |
US8613137B2 (en) | 2004-11-16 | 2013-12-24 | Mahle International Gmbh | Connecting rod lubrication recess |
US20090126191A1 (en) * | 2004-11-16 | 2009-05-21 | Mcewan Alan Stephen | Method of manufacturing a connecting rod assembly for an internal combustion engine |
US20100300244A1 (en) * | 2009-05-29 | 2010-12-02 | Cummins Intellectual Properties, Inc. | Anti-rotation bearing assembly and bearing |
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JP2016089991A (en) * | 2014-11-07 | 2016-05-23 | 大同メタル工業株式会社 | Bearing device and half-split bearing for use in bearing device |
US9862069B2 (en) * | 2014-11-27 | 2018-01-09 | Thielenhaus Technologies Gmbh | Method for producing grooves on a camshaft |
US20160153540A1 (en) * | 2014-11-27 | 2016-06-02 | Thielenhaus Technologies Gmbh | Method for Producing Grooves on a Camshaft |
US20170284454A1 (en) * | 2016-03-31 | 2017-10-05 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for machining a surface of a metal component, and metal component |
US10309447B2 (en) * | 2016-03-31 | 2019-06-04 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for machining a surface of a metal component, and metal component |
JP2019027524A (en) * | 2017-07-31 | 2019-02-21 | 大同メタル工業株式会社 | Half-split bearing and sliding bearing |
CN108240398A (en) * | 2018-03-21 | 2018-07-03 | 济南大学 | A kind of compound Surface Texture friction is secondary |
JP2019218915A (en) * | 2018-06-21 | 2019-12-26 | 日産自動車株式会社 | Double-link type piston crank mechanism of internal combustion engine |
JP7127380B2 (en) | 2018-06-21 | 2022-08-30 | 日産自動車株式会社 | Multi-link piston crank mechanism for internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
DE50203628D1 (en) | 2005-08-18 |
ATE299562T1 (en) | 2005-07-15 |
EP1420177B1 (en) | 2005-07-13 |
EP1420177A1 (en) | 2004-05-19 |
ES2241944T3 (en) | 2005-11-01 |
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