Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs

Definitions

• the invention relates to the production of aluminum by igneous electrolysis according to the Hall-Héroult process. More particularly, it relates to a device for collecting solid debris immersed or floating in the electrolysis bath and the liquid metal, in particular the sludge from the electrolytic bath and which accumulates on the bottom of the tank as well as the remains of carbon and crust debris from the various operations performed before and during the removal of spent anodes. It relates more particularly to a device comprising a bucket bucket articulated and provided with means for the rapid replacement of said bucket bucket articulated.
• Aluminum is produced indirectly by igneous electrolysis, according to the well-known Hall-Héroult process, in electrolysis cells.
• the plants contain a large number of electrolysis cells arranged in line, in buildings called halls. or electrolysis rooms, and connected electrically in series using connecting conductors, so as to optimize the ground occupation of the factories.
• the cells are generally arranged to form two or more parallel lines that are electrically bonded together by end conductors.
• the electrolyte bath and the liquid metal are contained in a tank, called an "electrolysis cell", comprising a steel box, which is lined internally with refractory and / or insulating materials, and a cathode assembly located at the bottom of the tank.
• Anodes typically of carbonaceous material, are partially immersed in the electrolyte bath.
• an electrolysis plant requires interventions on the electrolysis cells including, in particular, the replacement of worn anodes with new anodes, the removal of liquid metal cells and the samples or additions of electrolyte
• the most modern factories are equipped with one or more service units comprising a movable bridge that can be translated, above the electrolysis cells, along the series of cells and one or more service machines each comprising a carriage adapted to be moved on the moving bridge, and a service module provided with handling and intervention devices, such as shovels and hoists, commonly called “tools”.
• the service module generally comprises a tool turret, each tool being either fixed to the end of a cable operated by a winch attached to said tool turret, or fixed to the end of a mobile arm, typically telescopic or articulated whose other end is attached to said tool turret.
• an orifice is formed in the crust, which orifice is left vacant until the new anode is installed and which will be referred to as "anodic hole".
• the breaking of the crust and the manipulations of the spent anodic block inevitably lead to the formation of solid pieces or parts which supernatant or remain suspended in the liquid medium consisting of the electrolysis bath and the liquid metal, or else which fall to the bottom of the body. tank. It is necessary to collect these solid parts by means of a collection tool, commonly called "crust".
• sludge is gradually deposited at the bottom of the tank, that is to say on the cathode, forming a thicker and thicker layer, which increases the resistance and consequently reduces the efficiency of said tank. . So we use the passage of the crust in the anodic hole to also collect the sludge that has accumulated on the bottom of the tank.
• European patent application EP-A-0 440 488 describes an example of a crust scoop associated with a particular vehicle, distinct from a service machine.
• European patent EP AO 618 313 describes in very little detail an example of a service machine equipped with a device adapted to ensure the failure of the heat in the vicinity of a worn anode and the cleaning of the anode hole that is conveyed by a particular vehicle or by a service machine, the shovel commonly employed is in the form of a clamp consisting of two buckets arranged substantially symmetrically with respect to a substantially vertical plane and articulated, pivoting itself by two substantially horizontal axes, possibly confused Each bucket has a leading edge, also called “blade”, vis-à-vis the leading edge of the other bucket.
• the crust scoop is immersed in the open position in the bath and then the crust scoop is passed from an open position to a closed position, using at least one actuator that acts either directly on a bucket, or on a linkage designed to bring the cups in a rotational movement substantially symmetrical with respect to each other, the solid debris between the two cups being thus trapped, while the liquid medium bath mixture electrolyte and
• Patent application EP 1 178 004 describes such a bucket shovel with a particular split frame.
• the object of the invention is a fastening device for attaching a collector container pivoting about an axis at the end of a movable arm, said collecting container, typically a bucket, having an opening for harvesting during said pivoting solid debris, comprising: a at least one pivot member pivotally mounted about said axis on said end of the movable arm and comprising: KJ • at least a first transverse arm provided with a first medium of attachment and
• At least one second transverse arm provided with a first group of bores oriented in a direction parallel to the axis; b at least two fasteners attached to said container:
• the first fastener being provided with a second fastening means cooperating with said first fastening means of said pivot member, so that when they come into contact with one another, it serves as a fastener; guide then abutting said first hooking means when said pivot member rotates about its axis in a given direction of rotation;
• the second fastener provided with a second group of n bores oriented in a direction parallel to the axis, positioned so that when said pivot member pivots in said
• central which is conical and is surrounded by two bores of the other group, called
• peripheral which are cylindrical and have different diameters; f. said pin is a bi-cylindrical conical shoulder shaft comprising. fl) two cylindrical portions, each cylindrical portion having a substantially equal diameter, slightly smaller than the diameter of the peripheral bore in which it is intended to slide, f2) and a conical intermediate portion whose slope is close to that of said bore Central.
• the attachment device comprises a pivot member which is integral with the movable arm and which is provided with transverse arms These may comprise one or more flanges which extend in a substantially radial direction.
• the attachment device is also provided with means arranged on the one hand on the transverse arms of said pivot member, and on the other hand on fasteners attached to the collecting container. These means are complementary hooking and locking means.
• the complementary locking means are a pin and bores which, once aligned, cooperate with said pin to ensure the blocking of the connection between said container and
• the pivot member could be integral with the collecting container and the fasteners could be integral with the movable arm but such a configuration is not really desired, insofar as it is easier to control the movement and rotation of the movable arm.
• pivot member when the latter is associated with the movable arm.
• the second transverse arm and the second attachment are respectively provided with m and n bores oriented in a direction parallel to the pivot axis of the pivot member.
• m and n are integers equal to or greater than 1 According to the invention, it is required that the product (m n) be strictly greater than 1, that is to say that if m is equal to 1, n is necessarily greater than 1 or vice versa, so that there are at least two bores 1 of one group to surround a bore of the other group.
• the bores of the corresponding group are not only oriented but also aligned in a given direction parallel to the pivot axis
• central bore there is at least one bore of a group, called “central bore”, which is conical and which is surrounded by two bores of the other group, called “peripheral bores”
• peripheral bore there is at least one bore of a group, called “central bore”, which is conical and which is surrounded by two bores of the other group, called “peripheral bores”
• said second transverse shaft comprises two flanges parallel to each other, which each carry a peripheral bore and which are spaced a distance greater than the thickness of the second fastener which carries said central bore reciprocally, if it is a second fastener of the collecting container which carries said peripheral bores, said second fastener is split and comprises two walls, which we will call, for convenience, also flaccid, parallel to each other, distant a distance greater than the thickness of the second transverse arm which carries said central bore.
• connection between the collecting container and the movable arm is provided by locking means, in this case bores which, once aligned, cooperate with a pin which is characterized in that it comprises two cylindrical parts of different diameters, each part having a diameter slightly smaller than that of the peripheral bore within which it is intended to slide, separated by a conical intermediate portion whose slope is close to that of the central bore.
• the combination of these bores and this pin has a first advantage: it facilitates the mounting of the collecting container on the movable arm. According to preferred embodiments of the invention, it also makes it possible to center the collecting container with respect to its support and it makes it possible to minimize or even cancel the radial and axial clearances between the spindle and the bores.
• the combination of these bores and the pin according to the invention facilitates assembly, the positioning of the end of the movable arm relative to the collecting container is always difficult to achieve, especially because the visual access to the end of the movable arm from the cockpit is often limited. As a result, the central bore and the peripheral bores are never perfectly coaxial.
• the advantage of the paiticukère form of the spindle is to facilitate the introduction of the spindle into the alignment of the bores - it is introduced by the cylindrical portion of small diameter first by making it through the large-diameter peripheral bore and then the conical bore and finally the small-diameter peripheral bore.
• the combination of these bores and the spindle also makes it possible to center the collection container relative to its support
• the carrier flange of the small diameter peripheral bore is provided with a sleeve protruding towards the other flange, the bore of which constitutes the peripheral bore of small diameter and the projecting end of which serves as an axial abutment to the wall, belonging to said second transverse arm or to said second fastener, which carries said central bore. It is possible to define the axial height of this protruding part of the sleeve as a function of the axial offset aimed at.
• the target value for the axial height of this projection relative to the bearing flange of the small diameter peripheral bore corresponds to half the difference between the distance between the faces facing the flanges which carry said bores; peripherals and the thickness of the wall that carries said central bore.
• the central bore is not perfectly centered with respect to the plates which carry the peripheral bores, to cause the wall which carries the central bore j ntil it comes into abutment on the end of sleeve protrusion relative to the bearing flange of the peripheral bore may diameter, the axial height of this projection for a perfect centering of said wall relative to said flanges.
• said device with means taking vice said pin, on its transverse face located on the side of the cylindrical portion of large diameter and the wall carrying the peripheral bore of small diameter, on a transverse face situated on the opposite side to the large-diameter peripheral bore m
• These means may for example comprise a screw and a nut, the body of the screw being introduced inside said axial bore, the head of the screw and the nut being in abutment, directly or by means of washers, on the one hand on the end of said pin close to the large diameter cylindrical surface and on the other hand on a transverse face integral with said flange and located on the opposite side to the large diameter peripheral bore.
• said face may be the other end of the protruding sleeve or the outer wall of said flange
• said first attachment means and said second attachment means are a pin oriented parallel to said pivot axis and at least one light for receiving and guiding said pin until it arrives in abutment on the bottom of said light
• each of these means may be integral with the movable arm or the collecting container
• the pivot member When, owing to the movement of the movable arm, said tenon comes into contact with a first wall bordering said light, the pivot member is pivoted in a given direction of rotation, chosen so that the tenon leaves this first edge; and moves through said light until reaching the wall forming the other edge of said light. The rotation of the pivot member is continued and the tenon is guided by this second edge until it reaches the abutment on the bottom of said light.
• the edges of the light are of unequal lengths, that of the second edge is smaller so as to allow the tenon to pass before its end before it comes into contact with the first edge, but it has a length sufficient to trap the tenon, when it "goes up", moved by the rotation of the pivot-member.
• the second fastener which carries the second group of bores, is placed on the collecting container at a distance from the first fastener so that, when said first fastening means and second fastening means cooperate, said member
• the pivot is in a position where the bores of the first group of bores and those of the second group of bores are substantially aligned in a common axial direction.
• the distance between the first attachment means and the bores of the first group of bores is substantially equal to the spacing between the second attachment means and the bores of the second group of bores.
• the distance between the second attachment means and the bores of the second group of bores depends on the good performance in
• the spacing between said first attachment means and the bores of said first group of bores is slightly greater, typically a few tenths of a millimeter, for example between 0.4 and 1.6 mm for a center distance of 350 mm, at the spacing between said second hooking means and the bores of said second group of bores.
• the attachment device comprises only a limited number of pins (one or two) and the number (n + m) of bores associated with each pin is as small as possible, preferably three.
• the fixing device for the fixing device to withstand the effect of a moment oriented perpendicularly to the pivot axis, it is advantageous to double either said hooking means or the groups of bores associated with a spindle. , that is to say all of these attachment means and to place them at each axial end of said collecting container
• said collecting container is a cup delimited by an axial wall, that is to say a regulated surface generated by a generatrix parallel to the pivot axis and based on an open directional curve, and two transverse walls and in which
• said pivot member comprises, in the vicinity of each of its ends, a first transverse arm serving to support an axially oriented tenon and, in the vicinity of its center, a second transverse arm comprising a first bearing flange of a large bore; diameter and a second flange, arranged parallel to the first flange and carrying a bore of small diameter,
• said axial wall of said bucket comprises Two first fasteners each provided with a light, disposed axially and spaced apart from each other by a distance typically close to the length of said post, each slot of each first fastener being intended to receive and guide said tenon up to in that it abuts on the bottoms of said lumens, s • a second fastener provided with a conical bore, arranged such that the distance between the axis of the conical bore and the straight line connecting the centers of curvature said bottom of said lights is slightly smaller, typically a few tenths of a millimeter, preferably between 0.4 and 1.6 mm for a distance of about 350 mm, at the distance between the axis of said pin and the common direction of the bores of large diameter and small diameter.
• said pivot member is actuated by at least one actuator which is also used to actuate said collection container and which is mounted integral with said movable arm.
• said actuator is a cylinder and said pivot member comprises at least one transverse arm provided with a hinge pin on which can be pivotably mounted a connecting rod connected to said cylinder.
• said first transverse arm, second transverse arm or a third transverse arm can play this support role of the pivot connection with said connecting rod.
• the fastening device is designed so that the fastening occurs during a movement of the pivot-member corresponding to the closure of said collector-container, that is to say to the movement For the collection of solid debris
• the "given direction of rotation", in which the attachment means cooperate is preferably the rotational movement corresponding to the closure of the collecting container
• said first attachment is placed near the opening of said container and is provided with a light open towards the opposite side to said opening.
• said pivot member is rotated in the closing direction of the collecting container so that the pin is driven toward the other edge of the aperture, the latter serving to guide the pin j ntil that it arrives at the bottom of said Lights e.
• Another object according to the invention is a fixing device for the simultaneous attachment of two buckets placed vis-à-vis, substantially symmetrically with respect to a plane Pl, characterized in that it comprises , associated with each bucket, placed
• connecting rod a common connecting rod
• At least one second actuator integral with said movable arm At least one second actuator integral with said movable arm.
• the pivot connection can be provided by a hinge pin, on which said rod is pivotally mounted.
• the hinge pins are placed relative to the pivot members which support them so that a relative displacement of said connecting rod is translated, for each bucket, by a rotational movement substantially symmetrical with respect to said plane Pl.
• said transverse arm provided with a pivot connection with said connecting rod may be said first transverse arm, said second transverse arm or a third transverse arm.
• the attachment of the buckets corresponds to a closing movement of the buckets and, conversely, the detachment of the old buckets is done with an opening movement.
• the second actuator is immobilized so as to lock the pivot members in rotation, so that, when attaching the new buckets, the first means of hooking are immediately in the right position at the time of contact with5 second attachment means.
• the first attachment means are closer to the plane of symmetry P2 than the first group of bores and the second attachment means are more close to the plane of symmetry I ⁇ Pl than the second group of bores.
• Another object according to the invention is a collection unit comprising a movable arm, at least one collection container actuated by at least one actuator integral with the mobile arm and, associated with said collecting container, at least one attachment device as described above
• Another ob j and according to the invention is a collection unit comprising an arm
• a particular embodiment of said collection unit comprises a) a movable arm, b) a frame attached to said movable arm, hc) two buckets, each bucket having an axial wall and two transverse walls and being articulated, pivoting about a direction parallel to an axis, said buckets being arranged substantially symmetrically with respect to a substantially vertical plane P, each bucket having a leading edge opposite the leading edge of the another bucket, so that the solid debris between the two openings of said buckets are trapped by said bucket.
• Said collection unit also comprises, assigned to each of said buckets and arranged substantially symmetrically with respect to said substantially vertical plane P, fixing devices each comprising.
• a pivot member pivotally mounted on said frame, comprising at least a first transverse arm provided with a first attachment means and at least a second arm
• first fastener being provided with a second attachment means cooperating with said first coupling means of said pivot member, and the second fastener being provided with a second group of nozzles; bores
• V oriented in a direction parallel to said axis, provided that, when said first attachment means and second attachment means cooperate, said pivot member pivots to a position where the bores of said first group of bores and said second group of bores are substantially aligned in a common axial direction;
• a pin intended to be introduced and to slide in alignment with said first group of bores and second group of bores, so as to ensure the fixing of said
• bores of said first group of bores and of said second group of bores being arranged such that, when they are all substantially aligned in a common axial direction, there is at least one bore of a group, called “bore” central ", which is conical and which is surrounded by two bores of the other group, called” bores "
• peripherals " which are cylindrical and have different diameters
• said pin being a shaft comprising two cylindrical portions, each cylindrical portion having a diameter substantially equal to, slightly smaller than, the diameter of the peripheral bore in which it is intended to slide, and a conical intermediate portion whose slope is close to that of said central bore
• each pivot member comprises, in the vicinity of each of its ends, a first transverse arm serving as a support for an axially oriented pin and, in the vicinity of its center, a second transverse arm comprising a first bearing flange. a bore of large diameter and a second flask, disposed parallel to the first flange and carrying a bore of small diameter.
• each bucket comprises two first fasteners each provided with an open lumen towards the side opposite the opening of said bucket, arranged axially in the vicinity of said opening and distant from each other for a distance typically close to the length of said tenon, each light of each first fastener being intended to receive and guide said stud until it abuts on the bottoms of said apertures and a second fastener provided with a conical bore disposed far from said aperture such that the distance between the axis of the conical bore and the straight line connecting the centers of curvature of said bottoms of said lumens is substantially equal, preferably slightly smaller, typically a few tenths of a millimeter, to the distance between the axis of said post and the
• said movable arm is a mobile vertical mast actuated by a first actuator which displaces said mobile vertical mast along its vertical axis and the pivot members associated with the first bucket and the second bucket each have at least one transverse bias bearing a pivot connection with a connecting rod connected to at least one second actuator, integral with said movable arm, said pivot links being placed on each transverse arm of such that a relative displacement of said connecting rod s is reflected, for each of said pivot members, by a substantially symmetrical rotational movement with respect to said plane P2, which is substantially vertical.
• the vertical mobile mast typically carried by the carriage of a traveling crane, is placed above the set of buckets arranged substantially symmetrically with respect to a substantially vertical plane Pl and then is 10 descended with the first actuator until the first hooking means come into contact with the second attachment means.
• the second actuator is then actuated to move the connecting rod and simultaneously rotate the buckets, preferably in the closing direction.
• Another object according to the invention is a crust scoop intended to collect solid debris and sludge present in the liquid media of an aluminum production cell (electrolysis bath and metal), in particular for cleaning anodic holes, characterized in that it is a collection unit as described above
• the mobile vertical mast here called “shovel barrel”
• the spacing between the first attachment means and the bores of the first group of bores is slightly greater than the distance between the second attachment means and the bores of the second group of bores, which allows ensure a fixing without play of the buckets.
• Another object according to the invention is a service machine, usable in an aluminum production plant by igneous electrolysis, comprising a carriage adapted to be moved on a mobile bridge and a service module equipped with at least one a handling and intervention member, characterized in that said handling and intervention member is a crustal scoop as described above.
• Another object according to the invention is a bucket support intended to cooperate with the fixing device for the simultaneous attachment of buckets placed vis-à-vis as described above II is characterized in that it comprises means for supporting and holding in position two buckets substantially symmetrically disposed with respect to a vertical plane P1, in a geometric configuration where the buckets are open, the opening angle being such that, after removal of the pins, after a slight rotation in the opening direction which frees the first hooking means from the second hooking means, a vertical upward movement of the movable arm can be effected to move the pivot members away without driving said buckets.
• the support means that make it possible to orient and maintain the buckets in a precise angular position can be for example V-shaped notches provided on the support posts and on which> come to rest a portion of the buckets whose section matches the complementary shape .
• FIG. 1 illustrates a typical electrolysis room, seen in section, intended for the production of aluminum and comprising a particular embodiment of the service machine according to the invention, shown schematically.
• Figure 2 illustrates, in front view, a particular embodiment of a crustal scoop according to the invention, mounted on telescopic vertical guide mast h
• FIG. 3 illustrates, in perspective, the excavator frame and the bucket bucket of the embodiment of Figure 2.
• FIG. 4 illustrates, in section, a portion of the fastening device according to the invention, comprising the spindle and the first and second groups of bores.
• Figure 5 illustrates, in front view and in section relative to a median vertical plane, a fixing device for the simultaneous attachment of two buckets placed vis-à-vis.
• FIG. 6 illustrates, in front view and in section with respect to a median vertical plane, a bucket support adapted to cooperate with the device of FIG. 5.
• FIG 7 illustrates, in front view and in section with respect to a vertical plane) 0 mediator, the device of Figure 5 set up on the support of Figure 6 and being in the attachment configuration simultaneous buckets
• Electrolysis plants for the production of aluminum comprise a liquid aluminum production zone which comprises one or more electrolysis rooms.
• the electrolysis room (1) illustrated in Figure 1 comprises electrolysis cells (2) and a service unit (5).
• the electrolysis cells (2) are normally arranged in tongues or rows, each row or line typically comprising more than one hundred cells.
• the cells (2) are arranged in such a way as to clear a circulation aisle along the room.
• the cells (2) comprise a series of anodes (4) provided with a metal rod (7) for fixing and electrically connecting the anodes to a metal anode frame (not shown)
• the service unit (5) is used to perform operations on the cells (2) such as anode changes or the filling feed hoppers crushed bath and aluminum fluoride (A1F3). It can also be used to handle various fillers, such as tank members, liquid metal ladles that are used in castings ("ladles") or anodes. It can also be used to clean the anode hole after removing a worn anode and before installing a new anode.
• the service unit (5) comprises a movable bridge (6) which can be translated to another location.
• the mobile carriage (8) comprises a tool turret which is equipped with several handling and intervention devices (10), such as tools, among which may be the crust scoop
• FIGs 2 to 7 illustrate a particular collection unit (100), which is a crust scoop (100 ') whose fixing device corresponds to an embodiment according m invention.
• the crust scoop (100 ') is fixed on a movable arm (11), which is here a shovel shaft (12)
• the shovel shaft is a movable mobile mast (9 ") sliding in a vertical mast (9') fixed with respect to the tool turret of the mobile carriage (8) of a service machine (3)
• the illustrated fastening device makes it possible to attach and detach simultaneously two buckets (120a and 120b) placed facing each other, substantially symmetrically with respect to a plane Pl.
• each bucket placed substantially symmetrically with respect to a plane P2 to be coincident with P1 (in this case, the -> common plane is designated P), an "elementary" attachment device according to the invention, adapted to fixing a single collecting container (120).
• an "elementary" attachment device adapted to fixing a single collecting container (120).
• the structural elements of the elementary device are designated with a reference number but, when they are illustrated on only one of the devices associated with said buckets, they are designated with a reference number, followed by an a or a b following the bucket concerned
• the attachment device For each bucket (120), the attachment device comprises: a. a pivot member (115) pivotally mounted about the pivot axis (500) on the end of the shovel (9 ") and comprising:
• first transverse arm here split into two flanges (116b, 116'b) h serving as a support for a first attachment means (117), which here is a pin (117b);
• each fastener (121b, 121'b) of the pair of clips is provided with a second attachment means (122), here an opening (122b).
• the tenon (117b) and the lumen (122b) cooperate with each other so that, when said tenon comes into contact with a first wall (1221b) bordering said light, the pivot member (115b) is rotated by following the closing direction, so that the tenon leaves this first contact, moves to a second contact on the wall (1222b) which forms the other edge of said light This second edge guides the tenon during the rotation of the pivot member until it abuts the bottom (1220b) of said light;
• the other fastener (123) is provided with a second group (124) of bores comprising a conical bore (1240) oriented in a direction parallel to the axis of said fastener is placed on the cup so that when the pivot member (115b) pivots in said closing direction until the tenon (117b) abuts against the bottom (1220b) of the light (122b), the two bores (1190 and 1191) of the first group of bores and the conical bore (1240) are substantially aligned in a common axial direction; the conical bore (1240), placed in the middle of the two cylindrical bores (1190 and 1191) of the other group, is called “central", while the cylindrical bores are called “peripheral”;;> We therefore use either the ad j ective "conical” and "central” to describe the bore which is surrounded by the other bores and either the "cylindrical” and adjectives "Device” to describe the bores around the central bore ; c a pin (130) for
• each cylindrical portion having a substantially equal diameter, slightly smaller than the diameter of the peripheral bore (resp. 1191, 1190) in which it is intended to slide,
• the combination of these bores facilitates the mounting of each bucket on the pivot member (115) pivotally mounted on the frame (110) integral with the shovel (12). It also makes it possible to center the bucket with respect to its support and it makes it possible to minimize or even cancel the radial and axial clearances between the spindle and the bores.
• the particular shape of the spindle facilitates its insertion into the alignment of the bores, even if the latter is not perfect it is introduced by the cylindrical portion of small diameter (131) first by passing through the bore (1190) large diameter then the conical bore (1240) and finally the bore 5 (1191) of small diameter.
• the combination of these bores and the spindle also makes it possible to center the collecting container by means of a bearing on its support, the flange (1181) of the bore (1191) of small diameter is provided with a sleeve ( 1182) projecting towards the other flange (1180).
• the bore of this sleeve (1182) is the bore (1191) of small diameter. Its projecting end (1183) has a transverse surface (1184) which serves as an axial abutment to the paioi of the fastener (123) which carries said central bore (1240).
• This protrusion (1183) with respect to the flange (1181) of the bore (1191) of small diameter corresponds to half the difference between the distance (D) between the faces opposite the flanges (1180 and 1181) which carry said peripheral bores (1190 and 1191) and the thickness (E) of the fastener (123) which carries said central bore (1240).
• the conical fitting allows, when the fastener (123) which carries the central bore (124) is not perfectly centered with respect to the flanges (1180 and 1181), driving the fastener (123) until it reaches the axial abutment wall (1184) of the protruding end (1183) of the sleeve, the axial height of this projection allowing a perfect centering said wall relative to said flanges.
• said device With means taking vice said pin between its transverse face (1321) located on the side of the cylindrical portion (132) of large diameter and a wall integral with the wall (1181) which carries the bore (1191) of may diameter.
• These means may for example comprise a screw (1401) and a nut (1404), the body of the screw being inserted inside the axial bore (135) of the pin (130), the head of the screw and the nut being supported by means of the washers (1402) and (1403), on the one hand on the end (1321) of said pin close to the cylindrical portion of large diameter (132) and secondly on a transverse face (11821) secured to the flange end and located on the opposite side to the bore (1190) of large diameter
• the spacing between said pin (117b) and the axis of the bores (1190, 1191) of large diameter and small diameter is between 345.4 mm and 345.6 mm, while on the bucket, the spacing between the bottom (1220b) of the lumen (122b) and the conical bore (1240) is between 344 mm and 345 mm.
• the fastening device comprises only one pin (130a, 130b) per bucket (120a, 120b) and 3 bores associated with said spindle.
• the fastening means have been split (121b, 121 'b) which carry the lights cooperating with the pin (117b) have been placed at each axial end of the bucket (120b).
• two pins per bucket and 6 bores, i.e., 3 bores associated with each pin were used.
• each group of bores associated with a pin was placed at each axial end of the bucket. , in the vicinity of the attachment means, also split, as in the present example.
• a first transverse arm and a second transverse arm which are grouped in the form of two boomerang-shaped flanges, one of the ends of the boomerang carrying a cylindrical bore (small diameter for the first flange, u) large diameter for the second flange) and the other end for supporting a post.
• the pivot member therefore carries, at each of its ends, through the double flanges in the form of boomerang, a stud and a group of peripheral bores.
• each bucket there are two pairs of fasteners carrying lights and two fasteners carrying a conical bore, the lights of each pair of fasteners cooperating with a tenon, each conical bore being intended to be placed in the middle of a group of peripheral bores.
• pivot members (115), pivotally mounted on the blanks (111) of the frame (110) integral with the shovel (9 "), are actuated by two cylinders (200, 201) themselves integral with said frame and acting simultaneously, each of them being used to
• the fastening device is designed such that the fastener occurs during a closing movement of the buckets
• the pivot members (115a, 115b) are provided with a transverse arm (113a - third transverse arm, 113b confused with the first transverse arm 116b) carrying a pivot connection on which said link rod z> (300) is pivotally mounted.
• the fastening of the buckets corresponds to a closing movement of the buckets and, conversely, the detachment of the old buckets is done with an opening movement.
• the jacks (200, 201) are immobilized so as to lock the pivot members (115a, 115b) in rotation, so that, when attaching new buckets, the tenons (117a, 117b) are immediately in the right position relative to the lights (122a, 122b).
• the tenons (117a, 117b) are closer to the plane of symmetry P2 than the first groups of bores (119a, 119b) and the fasteners (121a, 121b) carrying the J lights (122a, 122b) are closer to the plane of symmetry P1 than the fasteners (123a, 123b) carrying the tapered bores.
• a bucket support (400) intended to cooperate with the fixing device described above. It is provided with means for supporting and maintaining in position the two buckets (120a and 120b) placed substantially symmetrically by means of relative to a vertical plane Pl, in a geometric configuration where the buckets are open, the opening angle being such that, after removal of the pins, after a slight rotation in the direction of the opening which releases the pins (117a, 117b) lights (122a, 122b), vertical movement of the shovel (9 ”) can be effected without driving the buckets, and the support means for orienting and maintaining the buckets in a precise angular position include V-shaped notches (410a, 410b) formed on the support posts and on which the portions (128a) and (128b) of the buckets (120a) and (120b) which have a cross section of complementary shape [0058]second support, equipped with the same means to support and maintain the bucket position, and which is provided with two new buckets is made available.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Load-Engaging Elements For Cranes (AREA)
• Electrolytic Production Of Metals (AREA)
• Connection Of Plates (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=41021046

Family Applications (1)

Country Status (9)

Families Citing this family (4)

Family Cites Families (12)

• 2009
  • 2009-01-08 FR FR0900048A patent/FR2940796B1/fr not_active Expired - Fee Related
  • 2009-12-08 WO PCT/FR2009/001395 patent/WO2010079266A1/fr active Application Filing
  • 2009-12-08 EP EP09801220A patent/EP2373567B1/de not_active Not-in-force
  • 2009-12-08 CN CN200980154116.8A patent/CN102272034B/zh not_active Expired - Fee Related
  • 2009-12-08 CA CA2748543A patent/CA2748543A1/fr not_active Abandoned
  • 2009-12-08 US US13/143,430 patent/US8756837B2/en not_active Expired - Fee Related
  • 2009-12-08 RU RU2011133051/11A patent/RU2508243C2/ru not_active IP Right Cessation
  • 2009-12-08 AU AU2009336620A patent/AU2009336620B2/en not_active Ceased
• 2011
  • 2011-06-10 ZA ZA2011/04351A patent/ZA201104351B/en unknown

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events