US20080047393A1 - Split type connecting rod - Google Patents
Split type connecting rod Download PDFInfo
- Publication number
- US20080047393A1 US20080047393A1 US11/875,176 US87517607A US2008047393A1 US 20080047393 A1 US20080047393 A1 US 20080047393A1 US 87517607 A US87517607 A US 87517607A US 2008047393 A1 US2008047393 A1 US 2008047393A1
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- United States
- Prior art keywords
- bearing
- connecting rod
- crank
- pin hole
- locking
- 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
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Classifications
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- 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
- F16C9/045—Connecting-rod bearings; Attachments thereof the bearing cap of the connecting rod being split by fracturing
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- 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
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- 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
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer means
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- 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
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
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- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S384/00—Bearings
- Y10S384/90—Cooling or heating
- Y10S384/906—Antirotation key
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- 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
- Y10T74/2159—Section coupled
-
- 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
- Y10T74/216—Bearings, adjustable
Definitions
- the present invention relates to a split type connecting rod, and more particularly, to a split type connecting rod with a bearing located inside of a crank-pin hole.
- a split type connecting rod is formed such that a large end portion is fractured and divided into a rod portion and a cap portion along a splitting plane including the shaft center of a crank-pin hole, and the rod portion and the cap portion are coupled by coupling bolts, and a metal bearing is generally located on the inner circumferential surface of the crank-pin hole.
- this metal bearing has been split into a rod-side portion and a cap-side portion along the splitting plane and when such a split type metal bearing is disposed within the inner circumferential surface of the crank-pinhole, a bearing locking groove is formed in the inner circumferential surface so to extend in the circumferential direction so that a locking lug protruding from the rear surface (outer circumferential surface) of the metal bearing is locked by the bearing locking groove in order to determine a position of the metal bearing (e.g., see the Unexamined Japanese Patent Publication No. HEI 6-74237).
- the conventional split type connecting rod has a problem in that the metal bearing is easily rotated in the circumferential direction by an external force, and in order to prevent burning caused by this problem, a reliable lubrication structure is required.
- a motorcycle engine which tends to be used at high speed revolutions has a problem in that a large amount of deformation occurs at the large end portion and the amount of rotation of the metal bearing is likely to increase accordingly.
- preferred embodiments of the present invention provide a split type connecting rod with a simple structure that is capable of suppressing rotation of the metal bearing and reliably prevents problems such as burning.
- a split type connecting rod that holds a crank-pin through a bearing having a first protrusion and a second protrusion, includes a first locking groove that locks the first protrusion of the bearing when the bearing rotates forward in a circumferential direction of the crank-pin hole, and a second locking groove that locks the second protrusion of the bearing when the bearing rotates backward in the circumferential direction of the crank-pin hole, wherein the first locking groove and the second locking groove are deviated from each other in the circumferential direction.
- the split type connecting rod includes a small end portion and a large end portion, the large end portion includes a rod portion and a cap portion, wherein the first locking groove and the second locking groove are arranged to extend over both the rod portion and the cap portion when the large end portion is fractured and split into the rod portion and the cap portion.
- the first locking groove is preferably deviated to the rod portion side and the second locking groove is preferably deviated to the cap portion side.
- the first protrusion locked by the first locking groove and the second protrusion locked by the second locking groove are arranged separately on separate portions of the bearing that has been split.
- the bearing is substantially ring-shaped and disposed on an inner circumferential surface of the crank-pin hole.
- the first and second locking grooves are preferably substantially arc-shaped.
- first and second protrusions are preferably locking lugs.
- the first and second locking grooves are preferably arranged to prevent the bearing from moving in the circumferential direction.
- the bearing of the split type connecting rod includes a rod portion and a cap portion which are divided along a splitting line of the bearing, and at least two of the first locking grooves are provided on a first side of the splitting line and at least two of the second locking grooves are provided on a second side of the splitting line.
- a valley is formed on the inner circumferential surface of the crank-pin hole and that the valley includes a base portion.
- a fracture starting point groove is formed at the base portion of the valley, such that a width of the fracture starting point groove is less than a width of the valley.
- the split type connecting rod is a nut-less type of connecting rod that is made of one of a forged material, a cast material and a sintered material.
- the split type connecting rod includes a small end portion and a large end portion, and the large end portion includes the valley and the fracture starting point groove is formed in the large end portion.
- a pair of the fracture starting point grooves are formed on the inner circumferential surface of the crank-pin hole.
- the valley includes a pair of sloped portions which define chamfers for guiding the bearing and preferably have curved shapes or swelled, rounded shapes, or have a concave or rectilinear shape in an upper corner thereof.
- an engine includes a split type connecting rod according to any of the various preferred embodiments described above.
- a vehicle includes a split type connecting rod according to any of the various preferred embodiments described above.
- FIG. 1 is a front view of a split type connecting rod according to a first preferred embodiment of the present invention
- FIG. 2 is a cross-sectional view of a large end portion of the split type connecting rod of the first preferred embodiment of the present invention
- FIG. 3A is an enlarged view of a fracture starting point groove of the large end portion for illustrating the angle of a slope of the valley;
- FIG. 3B is an enlarged view of a fracture starting point groove of the large end portion for illustrating the width of an opening of the valley;
- FIG. 4 illustrates a method of fracturing and splitting the large end portion
- FIG. 5A is a front view of a split type connecting rod according to a second preferred embodiment of the present invention.
- FIG. 5B is a cross-sectional view of the split type connecting rod shown in FIG. 5A along a line V-V;
- FIG. 6 is a cross-sectional view of the split type connecting rod shown in FIG. 5B along a line VI-VI;
- FIG. 7 is a cross-sectional view of the split type connecting rod shown in FIG. 5B along a line VII-VII;
- FIG. 8 is a perspective view of an example of a cap-side metal bearing portion with a protruding locking lug provided at only one of the two ends;
- FIG. 9 is a perspective view of the split type connecting rod provided with the cap-side metal bearing portion shown in FIG. 8 .
- FIGS. 1 to 4 illustrate a split type connecting rod according to a first preferred embodiment of the present invention.
- FIG. 1 is a front view of the split type connecting rod
- FIG. 2 is a cross-sectional view of a large end portion of the split type connecting rod
- FIG. 3A and FIG. 3B are enlarged views of a fracture starting point groove of the large end portion
- FIG. 4 illustrates a method of fracturing and splitting the large end portion.
- reference numeral 100 denotes a split type connecting rod of the present preferred embodiment, which is preferably a nut-less type of connecting rod formed by forging, casting or sintering, or other suitable process.
- This split type connecting rod 100 is provided with a small end 101 c having a piston-pin hole 101 b at one end of a rod body 101 a and a large end portion 101 e having a crank-pin hole 101 d at the other end.
- the large end portion 101 e is provided with shoulders 101 f which extend rightward and leftward from the connection with the rod body 101 a, and the crank-pin hole 101 d is formed at the central portion between both shoulders 101 f. Furthermore, bolt holes 101 g which extend from the underside to the vicinity of the topside of the large end portion 101 e are formed in the shoulders 101 f.
- a rod portion 102 and a cap portion 103 are preferably integral and define a single, unitary structure that is formed beforehand and the entire split type connecting rod 100 including the large end portion 101 e is subjected to surface hardening treatment such as carburization and tempering.
- the large end portion 101 e is fractured and split into a rod portion 102 and cap portion 103 along a predetermined fracture plane (straight line A in the figure).
- Fracturing and splitting into the rod portion 102 and cap portion 103 is performed as shown in FIG. 4 by placing the split type connecting rod 100 on a base 110 , inserting sliders 111 which are movable in the diameter direction into the crank-pinhole 101 d of the large end portion 101 e and driving a wedge 112 between both sliders 111 .
- a surface hardened layer having a predetermined carburization depth is formed on the outer surface of the split type connecting rod 100 .
- the surface hardening treatment not only carburization and tempering but also nitriding, thermal spraying, vapor deposition or high-frequency quenching, or other suitable process, can be used.
- a pair of fracture starting point grooves 105 which extend in the shaft center direction of the crank-pin hole 101 d are preferably formed.
- the fracture starting point grooves 105 are preferably formed by notching through cutting, wire cutting (wire cutting electric discharge machining) or machining using a laser, or other suitable process, and are formed along a line of intersection between the plane that will define a fracture plane (expressed by straight line A in the figure) between the rod portion 102 and cap portion 103 of the large end portion 101 e, and the inner circumferential surface. That is, in the case of forming the fracture starting point grooves 105 by, e.g.
- a conductive wire is placed near a predetermined position of the inner circumferential surface of the crank-pin hole 101 d and a pulsed high voltage is applied between this conductive wire and the inner circumferential surface of the crank-pin hole 101 d.
- a valley 106 is formed between the inner circumferential surface of the crank-pin hole 101 d and the fracture starting point grooves 105 .
- the valley 106 is formed by chamfering upper and lower corners which are formed by the fracture starting point grooves 105 and the inner circumferential surface of the crank-pin hole 101 d.
- the opening of the valley 106 is preferably wider than the opening of the fracture starting point grooves 105 .
- This valley 106 is preferably formed through machining such as wire cutting as with the fracture starting point grooves 105 or simultaneously with molding of the split type connecting rod 100 through forging, casting or sintering, or other suitable process.
- sloped portions 106 a making up the valley 106 are preferably formed by linear notching in such a way that an angle ⁇ formed with the straight line A (a plane that will define a fracture plane) passing from the shaft center a of the crank-pin hole 101 d through a bottom portion 105 a in a bottom surface 105 c of the fracture starting point grooves 105 is preferably about 45 degrees. This causes the interior angle of the valley 106 to be approximately 90 degrees. Furthermore, upper and lower inner surfaces 105 b of the fracture starting point groove 105 are formed in such a way that an angle ⁇ formed with the straight line A is approximately 0 degrees, that is, substantially parallel to the straight line A.
- the valley 106 preferably has a greater opening width L 4 than an opening width L 3 of the fracture starting point groove 105 . This causes the sloped portions 106 a making up the valley 106 to function as chamfers when a bi-partitioned metal bearing (not shown) is inserted into the crank-pin hole 101 d in the direction of the bolt hole 101 g.
- the chamfering function of the sloped portions 106 a will be explained.
- Metal plating such as Sn (tin) plating is applied to the surface of the metal bearing as an anti-corrosion layer.
- Sn (tin) plating is applied to the surface of the metal bearing as an anti-corrosion layer.
- the ratio of the depth L 2 of the fracture starting point groove 105 to a shortest distance L 1 from the base point of the fracture starting point groove 105 (that is, a boundary 107 between the inner surface 105 b and sloped portion 106 a ) to the edge of the bolt hole 101 g is preferably about 70% or above.
- a pair of fracture starting point grooves 105 which extend in the inner circumferential surface of the crank-pin hole 101 d in the shaft center direction are formed, sloped portions 106 a are formed in the upper and lower corners between the fracture starting point groove 105 and the inner circumferential surface of the crank-pin hole 101 d.
- the valley 106 preferably has an opening width L 4 that is wider than the opening width L 3 of the fracture starting point groove 105 .
- the angle ⁇ formed by the valley 106 and the straight line A is preferably greater than the angle ⁇ formed by the fracture starting point groove 105 .
- FIG. 5A , FIG. 5B , FIG. 6 and FIG. 7 illustrate a split type connecting rod according to a second preferred embodiment of the present invention.
- FIG. 5A is a front view of the split type connecting rod of this embodiment
- FIG. 5B is a cross-sectional view of the split type connecting rod shown in FIG. 5A along a line V-V
- FIG. 6 is a cross-sectional view of the split type connecting rod shown in FIG. 5B along a line VI-VI
- FIG. 7 is a cross-sectional view of the split type connecting rod shown in FIG. 5B a long a line VII-VII.
- the split type connecting rod which will be explained in this preferred embodiment preferably has a basic configuration similar to that of the split type connecting rod 100 explained in the first preferred embodiment and identical components or components corresponding to each other between the two preferred embodiments are assigned the same reference numerals and detailed explanations thereof will be omitted.
- a split type connecting rod 200 in this preferred embodiment is provided with a substantially ring-shaped metal bearing 213 on the inner circumferential surface of a crank-pin hole 101 d.
- This metal bearing 213 is split into two portions of a rod-side metal bearing portion 213 a and a cap-side metal bearing portion 213 b along splitting lines on which the fracture plane (straight line A) and the crank-pin hole 101 d cross each other. That is, fracture starting point grooves 105 and the rod-side metal bearing portion 213 a and the cap-side metal bearing portion 213 b each preferably have a substantially semicircular shape.
- bearing locking grooves 201 h and 201 i are provided on the one splitting line side of the inner circumferential surface of the crank-pin hole 101 d, while bearing locking grooves 201 h ′ and 201 i ′ are provided on the other splitting line side.
- the bearing locking grooves 201 h, 201 h ′, 201 i, 201 i ′ are preferably formed by revolving a grooving cutter T which is placed in such a way as to be inscribed in the crank-pin hole 101 d and cutting to a predetermined depth.
- the bearing locking grooves 201 h, 201 h ′, 201 i, 201 i ′ are preferably arc-shaped when viewed in the shaft center direction of the crank-pin hole 101 d (see FIG. 6 and FIG. 7 ).
- the bearing locking grooves 201 h, 201 h ′ 201 i, 201 i ′ are formed so as to extend over the splitting line in the circumferential direction and so as to deviate to either side of the splitting line in the circumferential direction (see FIG. 5B ). More specifically, the bearing locking grooves 201 h, 201 h ′ deviate to the rod portion 102 side, while the bearing locking grooves 201 i, 201 i ′ deviate to the cap portion 103 side.
- the bearing locking groove 201 h is formed so as to deviate to the rod portion 102 side, while the bearing locking groove 201 i is formed so as to deviate to the cap portion 103 side.
- the bearing locking groove 201 h ′, 201 i ′ juxtaposed to each other in the shaft center direction of the crank-pin hole 101 d is formed so as to deviate to the rod portion 102 side, while the bearing locking groove 201 i ′ is formed so as to deviate to the cap portion 103 side.
- locking lugs 213 c, 213 c ′ are provided on the back of both ends 213 a ′ of the substantially semi-circular rod-side metal bearing portion 213 a
- locking lugs 213 d, 213 d ′ are provided on the back of both ends 213 b ′ of the substantially semi-circular cap-side metal bearing portion 213 b.
- the locking lugs 213 c are locked by the bearing locking grooves 201 h, 201 i formed on the split type connecting rod 200 side, while the locking lugs 213 c ′ are locked by the bearing locking grooves 201 h ′, 201 i ′ formed on the split type connecting rod 200 side.
- the locking lugs 213 d are locked by the bearing locking grooves 201 h, 201 i formed on the split type connecting rod 200 side, while the locking lugs 213 d ′ are locked by the bearing locking grooves 201 h ′, 201 i ′ formed on the split type connecting rod 200 side.
- the bearing locking grooves 201 h, 201 h ′, 201 i, 201 i ′ are deviated to either side of the splitting line in the circumferential direction
- the locking lugs 213 c, 213 c ′ of the rod-side metal bearing portion 213 a are locked at the ends on the rod portion 102 side of the bearing locking grooves 201 i, 201 i ′ deviated to the cap portion 103 side.
- the locking lugs 213 d, 213 d ′ of the cap-side metal bearing portion 213 b are locked at the ends on the cap portion 103 of the bearing locking grooves 201 h, 201 h ′ deviated to the rod portion 102 side.
- the locking lugs 213 c. 213 c ′ of the rod-side metal bearing portion 213 a are locked at the end of the bearing locking grooves 201 i, 201 i ′ and the locking lugs 213 d, 213 d ′ of the cap-side metal bearing portion 213 b are locked at the end of the bearing locking grooves 201 h, 201 h ′, and therefore it is possible to prevent the rod-side metal bearing portion 213 a and cap-side metal bearing portion 213 b from moving in the circumferential direction.
- the bearing locking grooves 201 h, 201 h ′, 201 i, 201 i ′ are deviated in the circumferential direction, it is possible to lock the locking lugs 213 c, 213 c ′, 213 d, 213 d ′ at the end of the bearing locking grooves 201 h, 201 h ′, 201 i, 201 i ′ without reducing the diameter of the grooving cutter T, that is, the diameters of the bearing locking grooves 201 h, 201 h ′, 201 i, 201 i ′.
- this preferred embodiment can prevent this problem because the locking lugs 213 c, 213 c ′, 213 d, 213 d ′ are locked at the end of the bearing locking grooves 201 h, 201 h ′, 201 i, 201 i′.
- the bearing locking grooves are preferably formed on both splitting lines, but the bearing locking grooves of various preferred embodiments of the present invention may be formed only on one splitting line. That is, as shown in FIG. 6 and FIG. 7 , this preferred embodiment assumes that the locking lugs 213 c, 213 c ′ protrude from both ends 213 a ′ of the rod-side metal bearing portion 213 a and the locking lugs 213 d, 213 d ′ protrude from both ends 213 b ′ of the cap-side metal bearing portion 213 b.
- FIG. 8 is a perspective view of one example of the cap-side metal bearing portion 213 b from which one locking lug 213 d protrudes for only one of both ends 213 b ′. Furthermore, FIG.
- FIG. 9 is a perspective view of the split type connecting rod 200 when this cap-side metal bearing portion 213 b is attached.
- the locking lug 213 d of the cap-side metal 213 b is locked by the bearing locking groove 201 h provided on the inner circumferential surface of the crank-pin hole 101 d.
- the rod-side metal bearing portion 213 a where one locking lug 213 c is provided on one of the two ends 213 a ′ so as to be locked by the bearing locking groove 201 i is also attached together. Therefore, it is possible to stop rotation in the circumferential direction of the rod-side metal bearing portion 213 a and cap-side metal bearing portion 213 b.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
A split type connecting rod has a simple structure that is capable of suppressing rotation of a metal bearing, and avoiding problems such as burning. The split type connecting rod holds a crank-pin through a metal bearing which has locking lugs. A bearing locking groove locks at least one of the locking lugs when the metal bearing rotates forward in the circumferential direction of a crank-pin hole. A bearing locking groove locks at least one of the locking lugs when the metal bearing rotates backward. The bearing locking grooves are deviated from each other in the circumferential direction.
Description
- This application is a Divisional Application of U.S. patent application Ser. No. 10/743,457 filed Dec. 23, 2003, currently pending.
- 1. Field of the Invention
- The present invention relates to a split type connecting rod, and more particularly, to a split type connecting rod with a bearing located inside of a crank-pin hole.
- 2. Description of the Related Art
- A split type connecting rod is formed such that a large end portion is fractured and divided into a rod portion and a cap portion along a splitting plane including the shaft center of a crank-pin hole, and the rod portion and the cap portion are coupled by coupling bolts, and a metal bearing is generally located on the inner circumferential surface of the crank-pin hole.
- In general, this metal bearing has been split into a rod-side portion and a cap-side portion along the splitting plane and when such a split type metal bearing is disposed within the inner circumferential surface of the crank-pinhole, a bearing locking groove is formed in the inner circumferential surface so to extend in the circumferential direction so that a locking lug protruding from the rear surface (outer circumferential surface) of the metal bearing is locked by the bearing locking groove in order to determine a position of the metal bearing (e.g., see the Unexamined Japanese Patent Publication No. HEI 6-74237).
- However, the conventional split type connecting rod has a problem in that the metal bearing is easily rotated in the circumferential direction by an external force, and in order to prevent burning caused by this problem, a reliable lubrication structure is required. In particular, a motorcycle engine which tends to be used at high speed revolutions has a problem in that a large amount of deformation occurs at the large end portion and the amount of rotation of the metal bearing is likely to increase accordingly.
- In order to overcome the problems described above, preferred embodiments of the present invention provide a split type connecting rod with a simple structure that is capable of suppressing rotation of the metal bearing and reliably prevents problems such as burning.
- According to a preferred embodiment of the present invention, a split type connecting rod that holds a crank-pin through a bearing having a first protrusion and a second protrusion, includes a first locking groove that locks the first protrusion of the bearing when the bearing rotates forward in a circumferential direction of the crank-pin hole, and a second locking groove that locks the second protrusion of the bearing when the bearing rotates backward in the circumferential direction of the crank-pin hole, wherein the first locking groove and the second locking groove are deviated from each other in the circumferential direction.
- The split type connecting rod includes a small end portion and a large end portion, the large end portion includes a rod portion and a cap portion, wherein the first locking groove and the second locking groove are arranged to extend over both the rod portion and the cap portion when the large end portion is fractured and split into the rod portion and the cap portion. When this happens, the first locking groove is preferably deviated to the rod portion side and the second locking groove is preferably deviated to the cap portion side.
- When the bearing is split as described above, the first protrusion locked by the first locking groove and the second protrusion locked by the second locking groove are arranged separately on separate portions of the bearing that has been split.
- It is preferred that the bearing is substantially ring-shaped and disposed on an inner circumferential surface of the crank-pin hole.
- The first and second locking grooves are preferably substantially arc-shaped.
- In addition, the first and second protrusions are preferably locking lugs.
- The first and second locking grooves are preferably arranged to prevent the bearing from moving in the circumferential direction.
- In one preferred embodiment of the present invention, the bearing of the split type connecting rod includes a rod portion and a cap portion which are divided along a splitting line of the bearing, and at least two of the first locking grooves are provided on a first side of the splitting line and at least two of the second locking grooves are provided on a second side of the splitting line.
- It is also preferred that a valley is formed on the inner circumferential surface of the crank-pin hole and that the valley includes a base portion.
- It is also preferred that a fracture starting point groove is formed at the base portion of the valley, such that a width of the fracture starting point groove is less than a width of the valley.
- It is further preferred that the split type connecting rod is a nut-less type of connecting rod that is made of one of a forged material, a cast material and a sintered material.
- As described above, the split type connecting rod includes a small end portion and a large end portion, and the large end portion includes the valley and the fracture starting point groove is formed in the large end portion.
- In another preferred embodiment of the present invention, a pair of the fracture starting point grooves are formed on the inner circumferential surface of the crank-pin hole.
- It is also preferred that the valley includes a pair of sloped portions which define chamfers for guiding the bearing and preferably have curved shapes or swelled, rounded shapes, or have a concave or rectilinear shape in an upper corner thereof.
- According to yet another preferred embodiment of the present invention, an engine includes a split type connecting rod according to any of the various preferred embodiments described above.
- According to a further preferred embodiment of the present invention, a vehicle includes a split type connecting rod according to any of the various preferred embodiments described above.
- Other features, elements, characteristics and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the present invention.
- Other features, elements, steps, characteristics and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments thereof with reference to the attached drawings.
-
FIG. 1 is a front view of a split type connecting rod according to a first preferred embodiment of the present invention; -
FIG. 2 is a cross-sectional view of a large end portion of the split type connecting rod of the first preferred embodiment of the present invention; -
FIG. 3A is an enlarged view of a fracture starting point groove of the large end portion for illustrating the angle of a slope of the valley; -
FIG. 3B is an enlarged view of a fracture starting point groove of the large end portion for illustrating the width of an opening of the valley; -
FIG. 4 illustrates a method of fracturing and splitting the large end portion; -
FIG. 5A is a front view of a split type connecting rod according to a second preferred embodiment of the present invention; -
FIG. 5B is a cross-sectional view of the split type connecting rod shown inFIG. 5A along a line V-V; -
FIG. 6 is a cross-sectional view of the split type connecting rod shown inFIG. 5B along a line VI-VI; -
FIG. 7 is a cross-sectional view of the split type connecting rod shown inFIG. 5B along a line VII-VII; -
FIG. 8 is a perspective view of an example of a cap-side metal bearing portion with a protruding locking lug provided at only one of the two ends; and -
FIG. 9 is a perspective view of the split type connecting rod provided with the cap-side metal bearing portion shown inFIG. 8 . - With reference now to the attached drawings, embodiments of the present invention will be explained below.
- FIGS. 1 to 4 illustrate a split type connecting rod according to a first preferred embodiment of the present invention.
FIG. 1 is a front view of the split type connecting rod,FIG. 2 is a cross-sectional view of a large end portion of the split type connecting rod,FIG. 3A andFIG. 3B are enlarged views of a fracture starting point groove of the large end portion andFIG. 4 illustrates a method of fracturing and splitting the large end portion. - In these figures,
reference numeral 100 denotes a split type connecting rod of the present preferred embodiment, which is preferably a nut-less type of connecting rod formed by forging, casting or sintering, or other suitable process. This splittype connecting rod 100 is provided with asmall end 101 c having a piston-pin hole 101 b at one end of arod body 101 a and alarge end portion 101 e having a crank-pin hole 101 d at the other end. - The
large end portion 101 e is provided withshoulders 101 f which extend rightward and leftward from the connection with therod body 101 a, and the crank-pin hole 101 d is formed at the central portion between bothshoulders 101 f. Furthermore,bolt holes 101 g which extend from the underside to the vicinity of the topside of thelarge end portion 101 e are formed in theshoulders 101 f. - In the
large end portion 101 e, arod portion 102 and acap portion 103 are preferably integral and define a single, unitary structure that is formed beforehand and the entire splittype connecting rod 100 including thelarge end portion 101 e is subjected to surface hardening treatment such as carburization and tempering. Thelarge end portion 101 e is fractured and split into arod portion 102 andcap portion 103 along a predetermined fracture plane (straight line A in the figure). Fracturing and splitting into therod portion 102 andcap portion 103 is performed as shown inFIG. 4 by placing the splittype connecting rod 100 on abase 110, insertingsliders 111 which are movable in the diameter direction into the crank-pinhole 101 d of thelarge end portion 101 e and driving awedge 112 between bothsliders 111. - Then, these fractured and split
rod portion 102 andcap portion 103 are aligned with each other by contacting both fractured and split surfaces with each other and coupled by couplingbolts 104 fitted in therespective bolt holes 101 g. - Through the surface hardening treatment, a surface hardened layer having a predetermined carburization depth is formed on the outer surface of the split
type connecting rod 100. For the surface hardening treatment, not only carburization and tempering but also nitriding, thermal spraying, vapor deposition or high-frequency quenching, or other suitable process, can be used. - On the inner circumferential surface of the crank-
pin hole 101 d, a pair of fracturestarting point grooves 105 which extend in the shaft center direction of the crank-pin hole 101 d are preferably formed. The fracturestarting point grooves 105 are preferably formed by notching through cutting, wire cutting (wire cutting electric discharge machining) or machining using a laser, or other suitable process, and are formed along a line of intersection between the plane that will define a fracture plane (expressed by straight line A in the figure) between therod portion 102 andcap portion 103 of thelarge end portion 101 e, and the inner circumferential surface. That is, in the case of forming the fracturestarting point grooves 105 by, e.g. wire cutting, a conductive wire is placed near a predetermined position of the inner circumferential surface of the crank-pin hole 101 d and a pulsed high voltage is applied between this conductive wire and the inner circumferential surface of the crank-pin hole 101 d. This produces a corona discharge between the conductive wire and the inner circumferential surface of the crank-pin hole 101 d and this discharge causes a portion of the inner circumferential surface of the crank-pin hole 101 d to be shaved, thereby forming the fracturestarting point grooves 105. - Between the inner circumferential surface of the crank-
pin hole 101 d and the fracturestarting point grooves 105, avalley 106 is formed. Thevalley 106 is formed by chamfering upper and lower corners which are formed by the fracturestarting point grooves 105 and the inner circumferential surface of the crank-pin hole 101 d. Furthermore, the opening of thevalley 106 is preferably wider than the opening of the fracturestarting point grooves 105. Thisvalley 106 is preferably formed through machining such as wire cutting as with the fracturestarting point grooves 105 or simultaneously with molding of the splittype connecting rod 100 through forging, casting or sintering, or other suitable process. - As shown in
FIG. 2 ,FIG. 3A andFIG. 3B , slopedportions 106 a making up thevalley 106 are preferably formed by linear notching in such a way that an angle β formed with the straight line A (a plane that will define a fracture plane) passing from the shaft center a of the crank-pin hole 101 d through abottom portion 105 a in abottom surface 105 c of the fracturestarting point grooves 105 is preferably about 45 degrees. This causes the interior angle of thevalley 106 to be approximately 90 degrees. Furthermore, upper and lowerinner surfaces 105 b of the fracturestarting point groove 105 are formed in such a way that an angle α formed with the straight line A is approximately 0 degrees, that is, substantially parallel to the straight line A. - Furthermore, the
valley 106 preferably has a greater opening width L4 than an opening width L3 of the fracturestarting point groove 105. This causes thesloped portions 106 a making up thevalley 106 to function as chamfers when a bi-partitioned metal bearing (not shown) is inserted into the crank-pin hole 101 d in the direction of thebolt hole 101 g. - Here, the chamfering function of the sloped
portions 106 a will be explained. When no chamfering is applied to the corners, the metal bearing contacts the corners when the metal bearing is fitted into the crank-pin hole. Metal plating such as Sn (tin) plating is applied to the surface of the metal bearing as an anti-corrosion layer. When this plated layer comes into contact with the sharp corners formed by fracturing and splitting, a portion of the plated layer is shaved into particles and these particles are stuck to the fracture surface. The stuck particles hamper high-precision recoupling of the split type connecting rod. In contrast, when chamfering is applied to the corners, that is, when thevalley 106 is formed, a portion of the plated layer is hardly shaved, making it possible to suppress generation of particles which is a factor in the hampering of high-precision recoupling of the split type connecting rod. - The ratio of the depth L2 of the fracture
starting point groove 105 to a shortest distance L1 from the base point of the fracture starting point groove 105 (that is, aboundary 107 between theinner surface 105 b and slopedportion 106 a) to the edge of thebolt hole 101 g is preferably about 70% or above. - Thus, according to this preferred embodiment, a pair of fracture
starting point grooves 105 which extend in the inner circumferential surface of the crank-pin hole 101 d in the shaft center direction are formed, slopedportions 106 a are formed in the upper and lower corners between the fracturestarting point groove 105 and the inner circumferential surface of the crank-pin hole 101 d. Thevalley 106 preferably has an opening width L4 that is wider than the opening width L3 of the fracturestarting point groove 105. In other words, the angle β formed by thevalley 106 and the straight line A is preferably greater than the angle α formed by the fracturestarting point groove 105. As a result, it is possible to set a greater ratio of the depth L2 of the fracturestarting point groove 105 to the shortest distance L1 from the base point of the fracturestarting point groove 105 to the edge of thebolt hole 101 g with respect to the inner circumferential surface of the crank-pin hole 101 d as the base point and reliably form a hardened layer through surface hardening treatment up to thebottom portion 105 a of the fracturestarting point groove 105. This makes it possible to increase a stress expansion coefficient at thebottom portion 105 a of the fracturestarting point groove 105, to prevent peeling or falling at the time of fracturing and splitting, and to avoid problems such as damage or burning due to falling when the engine is running. -
FIG. 5A ,FIG. 5B ,FIG. 6 andFIG. 7 illustrate a split type connecting rod according to a second preferred embodiment of the present invention.FIG. 5A is a front view of the split type connecting rod of this embodiment,FIG. 5B is a cross-sectional view of the split type connecting rod shown inFIG. 5A along a line V-V,FIG. 6 is a cross-sectional view of the split type connecting rod shown inFIG. 5B along a line VI-VI andFIG. 7 is a cross-sectional view of the split type connecting rod shown inFIG. 5B a long a line VII-VII. The split type connecting rod which will be explained in this preferred embodiment preferably has a basic configuration similar to that of the splittype connecting rod 100 explained in the first preferred embodiment and identical components or components corresponding to each other between the two preferred embodiments are assigned the same reference numerals and detailed explanations thereof will be omitted. - A split
type connecting rod 200 in this preferred embodiment is provided with a substantially ring-shapedmetal bearing 213 on the inner circumferential surface of a crank-pin hole 101 d. Thismetal bearing 213 is split into two portions of a rod-sidemetal bearing portion 213 a and a cap-sidemetal bearing portion 213 b along splitting lines on which the fracture plane (straight line A) and the crank-pin hole 101 d cross each other. That is, fracturestarting point grooves 105 and the rod-sidemetal bearing portion 213 a and the cap-sidemetal bearing portion 213 b each preferably have a substantially semicircular shape. - Furthermore, bearing locking
grooves pin hole 101 d, while bearing lockinggrooves 201 h′ and 201 i′ are provided on the other splitting line side. As shown inFIG. 6 , thebearing locking grooves pin hole 101 d and cutting to a predetermined depth. Thebearing locking grooves pin hole 101 d (seeFIG. 6 andFIG. 7 ). - Furthermore, when viewed in the direction that is substantially perpendicular to the shaft center of the crank-
pin hole 101 d, thebearing locking grooves FIG. 5B ). More specifically, thebearing locking grooves rod portion 102 side, while thebearing locking grooves cap portion 103 side. In other words, of thebearing locking grooves pin hole 101 d, thebearing locking groove 201 h is formed so as to deviate to therod portion 102 side, while thebearing locking groove 201 i is formed so as to deviate to thecap portion 103 side. On the other hand, of thebearing locking grooves 201 h′, 201 i′ juxtaposed to each other in the shaft center direction of the crank-pin hole 101 d, thebearing locking groove 201 h′ is formed so as to deviate to therod portion 102 side, while thebearing locking groove 201 i′ is formed so as to deviate to thecap portion 103 side. - Furthermore, as shown in
FIG. 6 , locking lugs 213 c, 213 c′, preferably two lugs each, are provided on the back of both ends 213 a′ of the substantially semi-circular rod-sidemetal bearing portion 213 a, and lockinglugs metal bearing portion 213 b. The locking lugs 213 c are locked by thebearing locking grooves type connecting rod 200 side, while the locking lugs 213 c′ are locked by thebearing locking grooves 201 h′, 201 i′ formed on the splittype connecting rod 200 side. The locking lugs 213 d are locked by thebearing locking grooves type connecting rod 200 side, while the locking lugs 213 d′ are locked by thebearing locking grooves 201 h′, 201 i′ formed on the splittype connecting rod 200 side. - More specifically, since the
bearing locking grooves metal bearing portion 213 a are locked at the ends on therod portion 102 side of thebearing locking grooves cap portion 103 side. The locking lugs 213 d, 213 d′ of the cap-sidemetal bearing portion 213 b are locked at the ends on thecap portion 103 of thebearing locking grooves rod portion 102 side. - The operations and effects of the preferred embodiment of the present invention will be explained.
- According to the bearing structure of this preferred embodiment, the locking lugs 213 c. 213 c′ of the rod-side
metal bearing portion 213 a are locked at the end of thebearing locking grooves metal bearing portion 213 b are locked at the end of thebearing locking grooves metal bearing portion 213 a and cap-sidemetal bearing portion 213 b from moving in the circumferential direction. - Here, since the
bearing locking grooves bearing locking grooves bearing locking grooves bearing locking grooves bearing locking grooves pin hole 101 d and the problem of stress concentration is likely to occur. On the other hand, when the diameters of thebearing locking grooves bearing locking grooves metal bearing 213 to move in the circumferential direction. However, this preferred embodiment can prevent this problem because the locking lugs 213 c, 213 c′, 213 d, 213 d′ are locked at the end of thebearing locking grooves - In this preferred embodiment, the bearing locking grooves are preferably formed on both splitting lines, but the bearing locking grooves of various preferred embodiments of the present invention may be formed only on one splitting line. That is, as shown in
FIG. 6 andFIG. 7 , this preferred embodiment assumes that the locking lugs 213 c, 213 c′ protrude from both ends 213 a′ of the rod-sidemetal bearing portion 213 a and the locking lugs 213 d, 213 d′ protrude from both ends 213 b′ of the cap-sidemetal bearing portion 213 b. However, it is also possible to use the rod-sidemetal bearing portion 213 a from which a locking lug (e.g., lockinglug 213 c) protrudes for only one of both ends 213 a′ and use the cap-sidemetal bearing portion 213 b from which a locking lug (lockinglug 213 d when only the lockinglug 213 c protrudes from the rod-sidemetal bearing portion 213 a) protrudes for only one of both ends 213 b′.FIG. 8 is a perspective view of one example of the cap-sidemetal bearing portion 213 b from which onelocking lug 213 d protrudes for only one of both ends 213 b′. Furthermore,FIG. 9 is a perspective view of the splittype connecting rod 200 when this cap-sidemetal bearing portion 213 b is attached. As shown inFIG. 9 , the lockinglug 213 d of the cap-side metal 213 b is locked by thebearing locking groove 201 h provided on the inner circumferential surface of the crank-pin hole 101 d. In actual use of such a cap-sidemetal bearing portion 213 b, the rod-sidemetal bearing portion 213 a where one lockinglug 213 c is provided on one of the two ends 213 a′ so as to be locked by thebearing locking groove 201 i is also attached together. Therefore, it is possible to stop rotation in the circumferential direction of the rod-sidemetal bearing portion 213 a and cap-sidemetal bearing portion 213 b. Thus, it is possible to realize the operations and effects similar to those of the splittype connecting rod 200 explained in this preferred embodiment without providing thebearing locking grooves 201 h′, 201 i′. - In the above-described case, it is also possible to introduce the features of the split
type connecting rod 100 explained in the first preferred embodiment into the splittype connecting rod 200 of this preferred embodiment. More specifically, it is possible to form thevalley 106 explained in the first preferred embodiment at positions where thebearing locking grooves 201 h′, 201 i′ are not provided, that is, at the positions on the predetermined fracture plane facing thebearing locking grooves pin hole 101 d. - The present invention is not limited to the above described preferred embodiments, and various variations and modifications may be possible without departing from the scope of the present invention.
- This application is based on the Japanese Patent Application No. 2002-378020 filed on Dec. 26, 2002 and the Japanese Patent Application No. 2003-315615 filed on Sep. 8, 2003, the entire contents of which are expressly incorporated by reference herein.
- While preferred embodiments of the present invention have been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing the scope and spirit of the present invention. The scope of the present invention, therefore, is to be determined solely by the following claims.
Claims (9)
1. A split connecting rod that holds a crank-pin through a bearing having a first protrusion and a second protrusion, comprising:
a first locking groove that locks the first protrusion of said bearing when said bearing rotates forward in a circumferential direction of a crank-pin hole;
a second locking groove that locks the second protrusion of said bearing when said bearing rotates backward in the circumferential direction of the crank-pin hole; wherein
the split connecting rod includes only the first locking groove and the second locking groove on a first side of the crank-pin hole and no locking grooves on a second side of the crank-pin hole.
2. The split connecting rod according to claim 1 , further comprising a large end portion including a rod portion and a cap portion, wherein said first locking groove and said second locking groove are arranged to extend over both of the rod portion and the cap portion when a large end portion is fractured and split into said rod portion and said cap portion, said first locking groove being deviated to said rod portion side and said second locking groove is deviated to said cap portion side.
3. The split connecting rod according to claim 1 , wherein when said bearing is split, said first protrusion locked by said first locking groove and said second protrusion locked by said second locking groove are arranged separately on separate portions of said bearing that has been split.
4. The split connecting rod according to claim 1 , wherein the bearing is substantially ring-shaped and disposed on an inner circumferential surface of the crank-pin hole.
5. The split connecting rod according to claim 1 , wherein the bearing includes a rod portion and a cap portion which are divided along a splitting line of said bearing.
6. The split connecting rod according to claim 1 , wherein the first and second locking grooves are substantially arc-shaped.
7. The split connecting rod according to claim 1 , wherein the first and second locking grooves are arranged to prevent the bearing from moving in said circumferential direction.
8. The split connecting rod according to claim 1 , wherein the first locking groove and the second locking groove are arranged inwardly from an edge of the crank-pin hole in an axial direction of the crank-pin hole.
9. The split connecting rod according to claim 1 , wherein the first and second locking grooves are arranged to prevent the bearing from moving in an axial direction of the crank-pin hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/875,176 US20080047393A1 (en) | 2002-12-26 | 2007-10-19 | Split type connecting rod |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002378020 | 2002-12-26 | ||
JP2002-378020 | 2002-12-26 | ||
JP2003315615 | 2003-09-08 | ||
JP2003-315615 | 2003-09-08 | ||
US10/743,457 US7299716B2 (en) | 2002-12-26 | 2003-12-23 | Split type connecting rod |
US11/875,176 US20080047393A1 (en) | 2002-12-26 | 2007-10-19 | Split type connecting rod |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/743,457 Division US7299716B2 (en) | 2002-12-26 | 2003-12-23 | Split type connecting rod |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080047393A1 true US20080047393A1 (en) | 2008-02-28 |
Family
ID=32473741
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US10/743,457 Active 2025-07-12 US7299716B2 (en) | 2002-12-26 | 2003-12-23 | Split type connecting rod |
US11/875,176 Abandoned US20080047393A1 (en) | 2002-12-26 | 2007-10-19 | Split type connecting rod |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/743,457 Active 2025-07-12 US7299716B2 (en) | 2002-12-26 | 2003-12-23 | Split type connecting rod |
Country Status (6)
Country | Link |
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US (2) | US7299716B2 (en) |
EP (1) | EP1433965B1 (en) |
CN (1) | CN100373061C (en) |
AT (1) | ATE445787T1 (en) |
DE (1) | DE60329652D1 (en) |
TW (1) | TWI235208B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120325883A1 (en) * | 2011-06-24 | 2012-12-27 | Suzuki Motor Corporation | Connecting rod fracture splitting method and apparatus therefor |
US20130004110A1 (en) * | 2010-03-24 | 2013-01-03 | Schaeffler Technologies AG & Co. KG | Bearing ring |
USD801151S1 (en) | 2016-07-08 | 2017-10-31 | Race Winning Brands, Inc. | I-beam connecting rod |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005308189A (en) * | 2004-04-26 | 2005-11-04 | Honda Motor Co Ltd | Connecting rod, and method for manufacturing the same |
JP2006300081A (en) * | 2005-04-15 | 2006-11-02 | Honda Motor Co Ltd | Method of manufacturing connecting rod |
US7757584B2 (en) * | 2005-05-20 | 2010-07-20 | Yamaha Hatsudoki Kabushiki Kaisha | Connecting rod and internal combustion engine and automotive vehicle incorporating the same |
US20120066888A1 (en) * | 2009-03-16 | 2012-03-22 | Alfing Kessler Sondermaschinen Gmbh | Method for joining two components of a unit |
JP2011183529A (en) * | 2010-03-10 | 2011-09-22 | Suzuki Motor Corp | Connecting rod rupture dividing device and rupture dividing method |
JP6145301B2 (en) * | 2013-05-14 | 2017-06-07 | 株式会社安永 | Method and apparatus for forming fracture start portion of connecting rod |
WO2015176649A1 (en) * | 2014-05-20 | 2015-11-26 | Neo Mechanics Limited | A reciprocating internal combustion engine piston-cylinder-connecting rod assembly |
CN104196872A (en) * | 2014-07-28 | 2014-12-10 | 朱德仲 | Swinging rod mechanism for closed container device |
US10618103B2 (en) * | 2015-11-20 | 2020-04-14 | Caterpillar Inc. | Method for non-linear fracture splitting |
EP3173637B1 (en) * | 2015-11-24 | 2018-11-14 | BRP-Rotax GmbH & Co. KG | Fracture-separated engine component and method for manufacturing same |
USD904754S1 (en) * | 2018-11-30 | 2020-12-15 | William Prym Gmbh & Co. Kg | Pompon maker |
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JPH10128481A (en) | 1996-10-25 | 1998-05-19 | Honda Motor Co Ltd | Manufacture of connecting rod |
-
2003
- 2003-12-23 US US10/743,457 patent/US7299716B2/en active Active
- 2003-12-25 TW TW092136883A patent/TWI235208B/en not_active IP Right Cessation
- 2003-12-26 CN CNB2003101244753A patent/CN100373061C/en not_active Expired - Lifetime
- 2003-12-29 DE DE60329652T patent/DE60329652D1/en not_active Expired - Lifetime
- 2003-12-29 EP EP03029941A patent/EP1433965B1/en not_active Expired - Lifetime
- 2003-12-29 AT AT03029941T patent/ATE445787T1/en not_active IP Right Cessation
-
2007
- 2007-10-19 US US11/875,176 patent/US20080047393A1/en not_active Abandoned
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US3390925A (en) * | 1966-04-19 | 1968-07-02 | Caterpillar Tractor Co | Connecting rod with strap type cap |
US3679244A (en) * | 1970-09-21 | 1972-07-25 | Robert R Reddy | Releasable shaft lock |
US4014596A (en) * | 1975-01-29 | 1977-03-29 | Kabushikikaisha Ochiai Seisakusho | Self-centerable bearing |
US4693139A (en) * | 1984-09-14 | 1987-09-15 | Honda Giken Kogyo Kabushiki Kaisha | Connecting rod of reciprocating motion system and method for producing the same |
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US6312159B1 (en) * | 1998-12-16 | 2001-11-06 | Honda Giken Kogyo Kabushiki Kaisha | Bearing metal positioning structure in a split connecting rod |
Cited By (3)
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US20130004110A1 (en) * | 2010-03-24 | 2013-01-03 | Schaeffler Technologies AG & Co. KG | Bearing ring |
US20120325883A1 (en) * | 2011-06-24 | 2012-12-27 | Suzuki Motor Corporation | Connecting rod fracture splitting method and apparatus therefor |
USD801151S1 (en) | 2016-07-08 | 2017-10-31 | Race Winning Brands, Inc. | I-beam connecting rod |
Also Published As
Publication number | Publication date |
---|---|
TWI235208B (en) | 2005-07-01 |
US7299716B2 (en) | 2007-11-27 |
CN100373061C (en) | 2008-03-05 |
US20040159178A1 (en) | 2004-08-19 |
DE60329652D1 (en) | 2009-11-26 |
TW200424449A (en) | 2004-11-16 |
ATE445787T1 (en) | 2009-10-15 |
EP1433965A2 (en) | 2004-06-30 |
CN1512083A (en) | 2004-07-14 |
EP1433965A3 (en) | 2006-05-17 |
EP1433965B1 (en) | 2009-10-14 |
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