EP4045715A1 - Assemblage articule de deux maillons et chaine d'excavation associee - Google Patents
Assemblage articule de deux maillons et chaine d'excavation associeeInfo
- Publication number
- EP4045715A1 EP4045715A1 EP20788829.8A EP20788829A EP4045715A1 EP 4045715 A1 EP4045715 A1 EP 4045715A1 EP 20788829 A EP20788829 A EP 20788829A EP 4045715 A1 EP4045715 A1 EP 4045715A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- links
- hinge
- assembly
- link
- hole
- 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.)
- Pending
Links
- 238000009412 basement excavation Methods 0.000 claims description 50
- 238000013519 translation Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 4
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 235000011837 pasties Nutrition 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 7
- 210000005069 ears Anatomy 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 229910000617 Mangalloy Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
- E01B27/06—Renewing or cleaning the ballast in situ, with or without concurrent work on the track
- E01B27/10—Renewing or cleaning the ballast in situ, with or without concurrent work on the track without taking-up track
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
- E01B27/04—Removing the ballast; Machines therefor, whether or not additionally adapted for taking-up ballast
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
- E01B27/06—Renewing or cleaning the ballast in situ, with or without concurrent work on the track
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
- B22D25/023—Casting chains or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
- E21C25/28—Chains or chain guides
Definitions
- the invention relates, in general, to the technical field of clearing or excavation chains.
- the invention relates more specifically to an articulated assembly of two links intended to equip an excavation chain for a ballast clearing device below a railway track, to an excavation chain comprising such a link assembly and a method of manufacturing such links.
- ballasts located under the sleepers of a railroad track, and sorting it for possible reuse by dumping it on the track.
- These machines are commonly called “stripping machines”.
- work trains generally further comprise a machine responsible for screening the ballast to keep, on the one hand, the healthy part of the ballast for its reuse, and on the other hand, to evacuate the worn part of the ballast in wagons provided for this purpose.
- the stripper-screener makes it possible to remove and sort the used ballast and replace the entire ballast layer with the sorted healthy ballast as well as a possible additional supply of new ballast.
- Such work trains are equipped with excavation chains consisting of a succession of articulated links, at least part of which is equipped with shovels intended to excavate the ballast.
- This chain is arranged in a movable or adjustable manner in height, on the chassis of the rail vehicle.
- the chain is endlessly moved by a driving mechanism.
- the chain path is configured so that it has a rectilinear excavation portion located under the railway sleepers, the chain working on this excavation portion transversely to the orientation of the rails of the railway track. by training and carrying the ballast with them.
- brackets On either side of this rectilinear excavation portion are arranged brackets forming return members for the excavation chain.
- brackets are located at the ends of the rectilinear excavation portion, the portion along which the ballast is withdrawn, and are generally formed of a fixed bent wall on which the chain links slide successively.
- the chain circulates along a longitudinal arrival path then circulates on the rectilinear excavation portion after having passed through a first bent portion formed by one of the brackets.
- the chain which continues on its way then leaves said rectilinear excavation portion to circulate on the longitudinal outlet portion after having passed through a second bent portion formed by the other of the brackets.
- the shovels arrive on this rectilinear excavation portion while being unloaded and come out loaded with ballast towards the longitudinal exit portion.
- the longitudinal inlet and outlet portions are connected, in an area located high above the rail vehicle, by a transverse discharge portion where the ballast is discharged onto conveyor belts.
- the shovels unloaded from the ballast then continue their way towards the arrival longitudinal portion, then repeating these operations.
- Document EP 2 848 735 A1 describes an example of shovels of the prior art.
- the excavation chain itself must also be strong enough to transport these excavators in order to ensure the excavation and the transport of ballast while requiring a minimum of maintenance.
- the assembly of links articulated between them must not constitute a point of weakness for the chain and must allow sufficient pivoting to be able to pass the return members arranged in its path and without constraint.
- the invention aims to remedy all or part of the drawbacks of the state of the art by proposing in particular an articulation between two links, configured to limit their wear so as to be able to reduce maintenance operations and guarantee a duration of greater life of the links and the associated chain.
- an articulated assembly of two links for an excavation chain for a ballast excavating device a first of the two links comprising a one-piece body comprising two flanges parallel to each other and to a reference plane of the articulated assembly, each traversed by a through hole aligned with a geometric axis of articulation of the articulated assembly, perpendicular to the reference plane, a second of two links comprising a one-piece body comprising a guide flange inserted between the two parallel flanges of the first of the two links, the guide flange being traversed by a guide hole aligned with the geometric axis of articulation, the articulated assembly comprising in in addition to a hinge inserted in the guide hole and the through hole of each of the two parallel flanges, the articulated assembly being remarkable in that: - the guide hole is reinforced by u bush configured to receive the hinge and guide the hinge in rotation relative to the one-piece body of the
- Such a combination of characteristics is particularly advantageous in that it makes it possible to limit the wear of the hinge and of the two links of the assembly. Indeed, on the one hand, the assembly is locked in rotation with respect to the first of the two links comprising the two flanges parallel to each other limiting the friction between these two parts and, on the other hand, the assembly allows the rotation of the second of the two links at the level of its guide flange reinforced by a bush with the hinge of the hinge assembly. In addition, it allows particularly simple assembly and disassembly.
- one or the other of the two parallel flanges of the first of the two links comprises a translational locking interface configured to accommodate a locking means in translation of the hinge in at least one direction parallel to the geometric axis of articulation.
- the locking means is removable with respect to the locking interface. In this way, the maintenance operation consisting in removing the hinge from the assembly between the two links is facilitated.
- the translational locking interface and the translational locking means of the hinge do not block the hinge in rotation around the geometric axis of articulation.
- the locking interface is an annular groove inside the associated through hole of one of the two flanges of the first of the two links, the locking means preferably comprising an internal elastic ring .
- Such an annular groove is a relatively simple shape to be machined and allows the elastic ring to be accommodated therein so that the hinge is blocked in translation with respect to the geometric axis of articulation.
- the hinge is blocked in translation with respect to the geometric axis of articulation in a first direction by being in abutment against said elastic stop ring and, on the other hand, by being in abutment against a side surface of the dish.
- the inner elastic ring has a quadrilateral axial section, preferably rectangle, and more preferably a square section. Such a section of the elastic ring aims to increase its resistance to loads.
- the flange for blocking the hinge in translation is distinct from the flange for blocking the hinge in rotation.
- the first of the two links comprises a second distinct geometric axis of articulation, perpendicular to the reference plane.
- the flat of the through-hole is oriented so that it is contained in a plane.
- This plane is preferably perpendicular to a plane containing the two geometric axes of articulation and is preferably located between the two geometric axes of articulation.
- the body of each of the two links is made of cast steel, the flat of the through-hole of one of the two parallel flanges of the first of the two links being made with the body of the associated link so not to be machined.
- the one-piece link body can be made very easily and the flat is obtained at the same time.
- the hinge comprises, on one of its two ends, an anchoring interface, for example a tapped hole coaxial with the geometric axis of articulation, so as to allow its engagement with a tool for its manipulation.
- an anchoring interface for example a tapped hole coaxial with the geometric axis of articulation, so as to allow its engagement with a tool for its manipulation.
- the anchoring interface is a removable fixing interface to ensure cooperation of the tool with the hinge, the time only for a maintenance operation.
- an excavation chain having an excavation portion for a ballast excavating device below a railway track, the chain of excavation being remarkable in this that it comprises a succession of chain links connected in pairs by an assembly as described above to form an endless chain.
- the excavation chain is formed by an alternating succession of links forming the first link of an assembly with each of the two adjacent links and of links forming the second link of an assembly with its two adjacent links .
- Each link includes a body which extends longitudinally between a front end and a rear end.
- each of the two ends of the same first link forms a first of the two links for an assembly with an adjacent second link
- each of the two ends of the same second link forms a second of the two links for assembly with an adjacent first link.
- the same link has an interface such as a first link at one of its front and rear ends, and forms an interface such as a second link at the other of its front and rear ends.
- the invention also relates to a method of manufacturing a link intended to equip an excavation chain as described above, remarkable in that it comprises a molding step consisting in casting a metal or a liquid or pasty alloy, preferably steel, in a mold.
- a molding step consisting in casting a metal or a liquid or pasty alloy, preferably steel, in a mold.
- the flat of the through-hole of one of the two parallel flanges of the first of the two links is produced with the body of the associated link during the molding step, so as not to be machined .
- the manufacturing method comprises a machining step, on one or the other of the two flanges of the first of the two links, preferably separate from the flange for locking the hinge in rotation, d a locking interface configured to accommodate a means for locking the hinge in translation, for example an annular groove inside the associated through hole.
- FIG. 1 a simplified side diagram of a work train equipped with a stripper-screen
- FIG. 2 a partial diagram of an excavation or clearing device, seen from the front without an excavation chain
- FIG. 3 a perspective view of a portion of an excavation chain according to one embodiment
- FIG. 4 a front view of a portion of an excavation chain according to this embodiment
- FIG. 5 a sectional view A-A of FIG. 4;
- FIG. 6A an exploded view of a succession of links assembled according to this embodiment
- FIG. 6B a detail of FIG. 6A illustrating a perspective view of an elastic ring according to one embodiment
- FIG. 7 a top view of a succession of assembled links intended to equip an excavation chain
- FIG. 8 a partial view of section B-B of FIG. 7
- FIG. 9 a partial view of section C-C of FIG. 8;
- FIG. 10 a side view of a first link according to one embodiment
- FIG. 11 a top view of FIG. 10
- FIG. 12 a DD section view of FIG. 10.
- identical or similar elements are identified by identical reference signs in all of the figures.
- FIG. 1 there is illustrated a railway vehicle 1 such as a stripper-screen equipped with a clearing or excavation device 4 for cleaning the ballast of a railway track 2.
- This clearing or excavation device 4 is arranged between two bogies 3 of train 1.
- the ballast clearing device 4 comprises an excavation chain 8 moved endlessly by a drive mechanism 9 and guided by conduits including a transverse conduit 5 located under the track 2 in the working position , along which the chain runs on a substantially rectilinear excavation portion 8A.
- the clearing device 4 also comprises upward and downward ducts 6, 7 connected on either side of the transverse duct 5 to which they are connected by bent portions forming angle references 40 also called “brackets" (see figure 2). It is understood that the excavation portion is generally rectilinear, even though the excavation is provided in a part of the curve of each of the angle transmitters.
- the drive device 9 is arranged in height relative to the railway vehicle 1, above the railroad track 2, on a side longitudinally opposite to the transverse duct 5, and between the ascending duct 6 and the duct descent 7.
- the drive device 9 is placed on the path of the excavation chain 8 and comprises a drive wheel 9 'locally engraining with links 100 of the excavation chain 8 so as to move it.
- An endless path is thus formed to guide the excavation chain 8.
- Arrows illustrated in FIG. 2 indicate the direction of movement of the chain 8.
- idle wheels 41 forming return members 40 are provided for ensure the correct movement of chain 8 at these bent areas.
- the vehicle 1 further comprises a lifting unit 13 of the railway track 2 which is connected to a frame 14 of the vehicle 1 and which is located upstream of the clearing or excavation device4 with respect to a working direction 12 of the vehicle 1.
- a height adjustment device 16 is also provided and connected to the frame 14 of the vehicle 1, which is configured to move the clearing device 4, by drive means 15, from an elevated position to a position. lowered under the railway track 2 and can be connected for example removably to the transverse duct 5 by a connector (not visible in the figures).
- FIGS 3 and 4 illustrate a portion of an excavation chain 8 according to one embodiment.
- the excavation chain 8 is formed by a succession of links 100 articulated in pairs until the two ends of the chain 8 are connected end to end to form a closed chain 8, of the endless chain type.
- Each of the links 100 are articulated in pairs at their respective ends. More precisely, each assembly of two articulated links is produced between a first link 101 and a second link 102. Each articulation between two links is produced by an assembly 10, details of which are illustrated in particular in FIGS. 5 and 9.
- the first 101 of the two links comprises a one-piece body 101 'comprising two flanges 110a, 110b parallel to each other and to a reference plane P of the articulated assembly 10.
- the two flanges 110a, 110b are each crossed by a through hole 111 aligned on a geometric axis of articulation X of the articulated assembly 10, perpendicular to the reference plane P.
- Figures 10, 11 and 12 illustrate views of a link having articulation means at each of its longitudinal ends, each end of the link of which is provided with two flanges 110a, 110b parallel to one another, that is to say that the link is a first link to both with respect to the assembly 10 which links it to the adjacent front link and also with respect to the assembly which links it to the adjacent rear link.
- the second 102 of the two links comprises a one-piece body 102 'comprising a guide flange 120, preferably single, inserted between the two parallel flanges 110a, 110b of the first 101 of the two links, the guide flange 120 being crossed by a guide hole 112 aligned with the geometric axis of articulation X.
- the articulated assembly 10 further comprises a hinge 160 inserted into the guide hole 112 and the through hole 111 of each of the two parallel flanges 110a, 110b.
- the hinge 160 allows the connection between the first and second links 101,102 so as to form a hinge between these two links.
- the first 101 of the two links forms a female interface with its two flanges 110a, 110b to receive between the two, the guide flange 120 of the second 102 of the two links 101, 102 forming a male interface coming to interlock and mate, with the hinge 160 with the associated female interface.
- the guide hole 112 is reinforced by a sleeve 113 configured to receive the hinge 160 and guide the hinge 160 in rotation relative to the body 102 'of the second link 102.
- the sleeve 113 is shrunk, for example cold shrunk, in the guide hole 112 of the body 102 'of the second link 102 made of manganese steel.
- the sleeve 113 is arranged coaxially with the geometric axis of articulation X and configured to be in a pivot connection with the hinge 160, said sleeve 113 being held fixed in the body 102 'of the second link, in particular in the guide hole. 112.
- the bush is housed entirely in the guide hole 112 of the guide flange 120, so as not to protrude, which makes it possible to limit the friction between the parts of the assembly10.
- the sleeve 113 is preferably either flush with or slightly set back from the laterally emerging ends of the guide flange 120, in the guide hole 112, to avoid such a projection.
- the through hole 111 of one 110b of the two parallel flanges comprises a flat 105 cooperating with a flat 161 of the hinge 160 to lock the hinge 160 in rotation relative to the one-piece body 101 'of the first link 101 (see for example Figures 8 and 9).
- the rotation around the geometric axis of articulation X being blocked, friction is limited.
- the pivot articulation between the first and second links 101, 102 of the assembly 10 is for its part always allowed by the degree of freedom in rotation of the second link 102 with the hinge 160.
- a link 100 of the chain 8 comprises a front end and a rear end.
- the first link 101 of the assembly comprises a second distinct geometric articulation axis, parallel to the first, and perpendicular to the reference plane P.
- the plate 105 of the through hole 111 is oriented so as to be contained in a perpendicular plane Pp to a plane containing the two geometric axes of articulation X and perpendicular to the reference plane P. Such an orientation promotes the resumption of forces as a function of the direction of advance of the chain 8 and of the direction of rotation of the links between them when they pass certain obstacles such as the return members40.
- the hinge 160 comprises a substantially cylindrical body, one end of which is provided with a flat 161.
- an intermediate part of the hinge 160 is cylindrical to ensure the pivot connection with the second link 102 in the guide hole. 112 of the guide flange 120.
- the cylindrical part is separated from the flat 161 along the axis of the hinge 160 by a step 163 extending in a plane perpendicular to the geometric axis of articulation X of the assembly 10.
- the recess 163 of the hinge 160 comes into contact and bears against an inner face 110b 'of the flange 110b on a side edge 105' of the plate 105 which allows locking of the hinge 160 in a first direction.
- un110a of the two parallel flanges of the first link 101 comprises a locking interface 103 configured to accommodate a locking means 104 in translation of the hinge 160.
- the locking interface 103 is a machined annular groove, here bored, inside the associated through hole 111.
- the locking means 104 comprises an internal elastic stop ring which is received in the annular groove 103 and a part of which is positioned on the path of the hinge 160 to obstruct it and block its translation.
- said elastic ring 104 has a quadrilateral section, preferably rectangle.
- each means for locking the hinge 160 in translation in a given direction is carried by two separate flanges of the two parallel flanges 110a, 110b, that is to say that the flange 110a of the first 101 of the two links comprising the annular groove 103 is distinct from the flange 110b of the first 101 of the two links comprising the plate 105.
- the elastic ring 104 comprises a body 104a extending annularly over a certain angular sector, preferably greater than 240 ° delimiting an interior space 104c.
- the body 104a has at each of its ends ears 104b which extend radially inwardly 104c of the body 104a and are configured to be taken by a tool such as a pliers.
- the elastic ring 104 is formed in one piece, that is to say in one piece.
- the elastic ring 104 is formed of a solid material, that is to say which does not have holes, either on its body 104a or its ears 104b.
- the elastic ring 104 is formed, for example, of steel.
- the ears of the elastic ring 104 each have an elbow 104d so that the end part is directed in the direction of a distance from the other ear. This makes it possible to stiffen and strengthen the resistance to loads.
- the elastic ring 104 is designed to fit and cooperate in a groove 103 to stop the hinge 160 in a direction of translation along the geometric axis of articulation X.
- the elastic ring 104 is dimensioned so that it is in contact and in support radially with respect to the geometric axis of articulation X against a bottom of the circular groove when it is positioned in said groove 103.
- the hinge 160 comprises an anchoring interface 162 such as a threaded hole coaxial with the geometric axis of articulationX, so as to allow its engagement with a tool for its handling.
- This anchoring interface 162 is located on the side of the assembly where the elastic ring 104 is mounted in one 110a of the two parallel flanges of the first link 101, namely the side where the operator must access to proceed with the assembly and disassembly of the assembly 10.
- the anchoring interface 162 is located at one of its ends, opposite to the one with the flat161.
- the operator can act on the same side of the chain 8, using pliers to remove the elastic ring on the one hand, and using a suitable tool, for example a hammer. inertia, to cooperate with the threaded hole 162 opening onto one face of the end of the hinge 160 on the other hand.
- a suitable tool for example a hammer. inertia
- Each of the links 100, 101, 102 comprises a body 101 ', 102' which extends longitudinally between a front end and a rear end.
- the longitudinal direction is understood here as the direction of movement of the link 100.
- Each link 100, 101, 102 is hingedly connected to two other adjacent links of the chain 8 at each of its front and rear ends.
- Each link is articulated at its two front and rear ends with an adjacent link so that the same link is articulated by two separate assemblies 10 on either side of its body.
- Each articulation between two links is formed by an assembly 10 as described in detail above. It emerges from this that each end of the link is here configured either as a first 101 of the two links of the assembly considered, or as a second 102 of the two links of the assembly considered.
- each link body 101 ', 102' has symmetry with respect to a plane of symmetry perpendicular to its longitudinal axis and perpendicular to the reference plane P, but also perpendicular to a plane containing the two geometric axes d 'X joint.
- the front end is substantially symmetrical with respect to the rear end.
- each link body has the same similar interface, female or male, at its two ends, hence the simplified name of the link which can be given to it in chain 8, i.e. female chain link or male chain link.
- the arrangement of the assemblies in the chain 8 can be different.
- the same link may have, on one side, a first end forming a first link 101 of a first assembly and, on the other hand, a second end, opposite to the first, forming a second link 102 d 'another assembly.
- the excavation chain 8 is composed of a succession of links 100 among which the links are of three different types although they each have a configured body either as a male link 102 or as a female link 101.
- the excavation chain comprises links 100 of the type comprising a shovel 130, the links 100 of the type comprising a counter-stop 140 and links 100 of the type without protruding part, that is to say formed essentially from their body 101.
- each of the links 100 of the type comprising a shovel 130 is disposed between two links 100 of the type comprising a counter-stop 140.
- each link 100 of the type without protruding part is also disposed between two Links of the type comprising a counter-stop 140. Every other link is therefore provided with a counter-stop 140, the other links being alternately a link of the type comprising a shovel 130 and a link of the type without protruding part.
- a pattern of the chain 8 is therefore formed by a link 100 of the type without protruding part interposed between two links of the type comprising a counter-stop 140, and a link 100 of the type comprising a shovel 130 at a front end or back of this set of three links: these four links 100 together form, in this order, a pattern which is repeated successively along the chain 8.
- the links 100 of the type comprising a shovel 130 and of the type without projecting part are female links and the links 100 of the type comprising a counter-stop 140 are male links.
- Each link 100 comprising a shovel 130 comes directly in front of a link comprising a counter-stop 140 so, as already described, to limit a relative rotation of the link carrying the shovel 130.
- Such a configuration makes it possible, on the one hand, to guarantee a sufficiently small space between the links comprising a shovel 130 to ensure the excavation and the transport of ballast in an efficient manner, and on the other hand, to guarantee a space large enough to ensure the correct movement of the chain with the necessary flexibility to pass the return bodies 40.
- the front and rear ends of the bodies 101 ', 102' of the links 100, 101, 102 each have a curved convex portion, for example a rounded longitudinal end in the form of an arc of a circle, so as to be free of stops.
- Each curved portion preferably extends over an envelope having a generatrix parallel to the associated geometric axis of articulation X.
- each of the parallel 110a, 110b and guide flanges 112 traversed by the same hinge 160 have a substantially identical radius of curvature so that when the joint passes a return member, the contact of the joint on the return member is distributed over the first and second links 101, 102 articulated together.
- the guide flange 120 has play with the other two parallel flanges 110a, 110b between which it is placed which is sufficient for avoid friction during their relative rotation and but low enough to avoid allowing the ballast to get lodged in the joint.
- the links 100 run transversely with respect to the railway track 2 which corresponds to the longitudinal direction of the bodies 101 of the links 100 on this portion.
- the links 100 are oriented so that the geometric axes X of each of the joints 10 are substantially vertical with respect to the ground, the reference plane P then being horizontal, and the shovel 130 or the counter-stop 140 extending substantially radially towards the outside of the body of the associated link 100.
- the outer side of the links is the side where the ballast is excavated and transported.
- An inner side of the bodies 101 ′, 102 ′ of the links is for its part configured to come into contact and bear against the return members 40 on the path traveled by the chain 8.
- the links 100 are made for example of manganese steel and made in one piece.
- An example of a method of manufacturing this link 100 obtained by foundry comprises at least one metal injection step, and in particular a molding step in a mold formed for example of a form and an associated counter-form.
- the body 101 ', 102' of each of the links 100,101,102 is made of cast steel, the flat 105 of the through hole 111 of one 110b of the two parallel flanges of the first 101 of the two links being made with the body 101 of the associated link so as not to be machined.
- the only machining required on the bodies of the links 100 participating in the assembly concerns the bore 103 configured to receive the elastic ring 104.
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Electric Cable Arrangement Between Relatively Moving Parts (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1911423A FR3101892B1 (fr) | 2019-10-14 | 2019-10-14 | Assemblage articulé de deux maillons et chaîne d’excavation associée |
PCT/EP2020/078950 WO2021074247A1 (fr) | 2019-10-14 | 2020-10-14 | Assemblage articule de deux maillons et chaine d'excavation associee |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4045715A1 true EP4045715A1 (fr) | 2022-08-24 |
Family
ID=69630392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20788829.8A Pending EP4045715A1 (fr) | 2019-10-14 | 2020-10-14 | Assemblage articule de deux maillons et chaine d'excavation associee |
Country Status (8)
Country | Link |
---|---|
US (1) | US20230167612A1 (fr) |
EP (1) | EP4045715A1 (fr) |
CN (1) | CN114599837A (fr) |
AU (1) | AU2020368637A1 (fr) |
BR (1) | BR112022006937A2 (fr) |
CA (1) | CA3153973A1 (fr) |
FR (1) | FR3101892B1 (fr) |
WO (1) | WO2021074247A1 (fr) |
Family Cites Families (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE22380E (en) * | 1943-09-28 | Link chain | ||
US1046124A (en) * | 1911-03-13 | 1912-12-03 | John F Wagner | Drive-chain. |
US2168794A (en) * | 1933-07-01 | 1939-08-08 | Frank Prox Company | Mining chain cutter |
US2068802A (en) * | 1934-06-07 | 1937-01-26 | Jeffrey Mfg Co | Cutter chain |
US2090329A (en) * | 1936-01-03 | 1937-08-17 | Jeffrey Mfg Co | Cutter chain |
US2199292A (en) * | 1938-11-17 | 1940-04-30 | Link Belt Co | Heavy duty drive chain |
US2280502A (en) * | 1939-05-31 | 1942-04-21 | Cincinnati Mine Machinery Co | Cutter chain |
US2325792A (en) * | 1941-01-15 | 1943-08-03 | Bowdil Company | Method of making mining machine chain lugs |
US2332408A (en) * | 1942-05-28 | 1943-10-19 | Cincinnati Mine Machinery Co | Mine machine |
US2365229A (en) * | 1942-12-04 | 1944-12-19 | Sullivan Machinery Co | Pivoted link chain |
US2612056A (en) * | 1951-06-06 | 1952-09-30 | Frank Prox Company Inc | Cutter chain structure |
US2914867A (en) * | 1953-08-10 | 1959-12-01 | Scheuchzer Fredy | Track ballast machine |
US3807803A (en) * | 1971-06-29 | 1974-04-30 | L Rollins | Cutter chain having bits sets cutting different advance levels |
US3742863A (en) * | 1971-11-09 | 1973-07-03 | Fmc Corp | Telescopic tow chain |
US3856358A (en) * | 1973-04-27 | 1974-12-24 | Cincinnati Mine Machinery Co | Wear-resistant inserts for in surfaces of the links of cutter chains and the like to retard wear thereof |
DE2554690C3 (de) * | 1975-12-05 | 1980-11-13 | Gewerkschaft Eisenhuette Westfalia, 4670 Luenen | Anker-Abspannvorrichtung für eine Förder- und/oder Gewinnungsanlage in Bergbau-Gewinnungsbetrieben |
US4060978A (en) * | 1977-02-24 | 1977-12-06 | Columbia Steel Casting Co. Inc. | Drag chain |
US4134255A (en) * | 1977-02-24 | 1979-01-16 | Columbia Steel Casting Co., Inc. | Drag chain |
CZ286498B6 (en) * | 1995-04-12 | 2000-04-12 | Plasser Bahnbaumasch Franz | Pull-through and transportation chain for transporting gravel of track ballastway |
US6014826A (en) * | 1997-06-24 | 2000-01-18 | Walgren; Craig B. | Chain for trencher apparatus |
AT4370U3 (de) * | 2001-04-02 | 2002-03-25 | Plasser Bahnbaumasch Franz | Räumkette für eine gleisbaumaschine |
AT5766U3 (de) * | 2002-08-02 | 2003-09-25 | Plasser Bahnbaumasch Franz | Räumkette zum entfernen von schotter |
JP2004301239A (ja) * | 2003-03-31 | 2004-10-28 | Tsubakimoto Chain Co | ローラチェーン伝動装置 |
AT6488U3 (de) * | 2003-07-18 | 2004-10-25 | Plasser Bahnbaumasch Franz | Räumkette mit abgesenktem gelenk |
EA014893B1 (ru) * | 2008-10-03 | 2011-02-28 | Ооо "Вест-Тер" | Способ изготовления выгребающего звена рабочей цепи щебнеочистительной машины |
WO2010070741A1 (fr) * | 2008-12-17 | 2010-06-24 | 株式会社水谷組 | Chaîne sans fin et dispositif de retrait de ballast la comportant |
GB201107334D0 (en) * | 2011-05-04 | 2011-06-15 | Hydra Mining Tools Internat Ltd | Cutting chain etc |
AU2013204957A1 (en) * | 2012-07-31 | 2014-02-20 | Lazidis Rail Products Pty Ltd | Ballast Undercutter |
EP2848735B1 (fr) * | 2013-09-17 | 2016-11-09 | System7-Railsupport GmbH | Chaîne de rangement et de transport pour une machine de construction de voie ferrée |
CN203878427U (zh) * | 2014-05-04 | 2014-10-15 | 四川广正科技有限公司 | 一种用于铁道清筛机车用的新型耐磨防松扒齿 |
CN106592348B (zh) * | 2016-12-30 | 2018-09-21 | 常州市瑞泰工程机械有限公司 | 道砟清筛车用挖掘链 |
CN109554970B (zh) * | 2019-01-18 | 2024-05-07 | 唐山昆铁科技有限公司 | 扒板装置 |
-
2019
- 2019-10-14 FR FR1911423A patent/FR3101892B1/fr active Active
-
2020
- 2020-10-14 BR BR112022006937A patent/BR112022006937A2/pt unknown
- 2020-10-14 AU AU2020368637A patent/AU2020368637A1/en active Pending
- 2020-10-14 EP EP20788829.8A patent/EP4045715A1/fr active Pending
- 2020-10-14 WO PCT/EP2020/078950 patent/WO2021074247A1/fr active Application Filing
- 2020-10-14 CA CA3153973A patent/CA3153973A1/fr active Pending
- 2020-10-14 CN CN202080072089.6A patent/CN114599837A/zh active Pending
- 2020-10-14 US US17/754,806 patent/US20230167612A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2021074247A1 (fr) | 2021-04-22 |
CA3153973A1 (fr) | 2021-04-22 |
FR3101892B1 (fr) | 2021-09-10 |
FR3101892A1 (fr) | 2021-04-16 |
BR112022006937A2 (pt) | 2022-07-19 |
US20230167612A1 (en) | 2023-06-01 |
AU2020368637A1 (en) | 2022-05-12 |
CN114599837A (zh) | 2022-06-07 |
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