EP2586522A1 - Bucket including blades provided with retractable scrapers - Google Patents

Bucket including blades provided with retractable scrapers Download PDF

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Publication number
EP2586522A1
EP2586522A1 EP12190211.8A EP12190211A EP2586522A1 EP 2586522 A1 EP2586522 A1 EP 2586522A1 EP 12190211 A EP12190211 A EP 12190211A EP 2586522 A1 EP2586522 A1 EP 2586522A1
Authority
EP
European Patent Office
Prior art keywords
bucket
blade
scraper
wall
blades
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.)
Granted
Application number
EP12190211.8A
Other languages
German (de)
French (fr)
Other versions
EP2586522B1 (en
Inventor
Arnaud Miossec
François Podeur
David Rungoat
Pierre Nedelec
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emily SAS
Original Assignee
Emily SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Emily SAS filed Critical Emily SAS
Priority to PL12190211T priority Critical patent/PL2586522T3/en
Publication of EP2586522A1 publication Critical patent/EP2586522A1/en
Application granted granted Critical
Publication of EP2586522B1 publication Critical patent/EP2586522B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/054—Deformable stirrers, e.g. deformed by a centrifugal force applied during operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/092—Stirrers characterised by the mounting of the stirrers with respect to the receptacle occupying substantially the whole interior space of the receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1122—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades anchor-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/502—Vehicle-mounted mixing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/60—Safety arrangements

Definitions

  • the present invention relates to a bucket whose bucket incorporates a mixing member and / or distribution of a material.
  • the bucket of such a bucket is intended to contain said material to be mixed, to be dispensed, and a rotary member disposed along its rounded bottom wall forming a bucket to mix the material and / or distribute it through a opening made in a side wall of the bucket and which is normally closed by a hatch movable between an open position and a closed position.
  • FIG. 1 and 2 A shaft A rotatable between the two side walls of a bucket, parallel to its bottom wall, and around which is mounted a plurality of means for driving the material and which are here in the form of blades P.
  • Each blade P consists of a pair of wings L1, L2 adjoining on either side of a central core C integral with the shaft. It has, in front view, a flat plate structure of triangular geometry and whose width decreases towards the periphery of the blade P, to receive on each side of its tip end portion, the pair of wings L1 and L2.
  • the central core C is fixed on the shaft A by welding.
  • Each wing L present in front view, a triangular geometry whose peripheral edge is delimited by a radius O centered on the axis of the shaft A.
  • a notch digs the free lateral edge to facilitate the reflux of the material between the blades, while its other lateral edge is fixed on the central core C by welding.
  • a radial gusset G traverses the central core in its middle part by being bonded thereto by welding to increase the lateral rigidity of the blade required during its operation, because of its incidence.
  • the axis of the shaft A is centered on that of the round bottom wall of the bucket.
  • the peripheral edge of the blade travels a short distance from this bottom wall to limit the wear of the blade or said bottom wall.
  • the applicant has found that certain materials or mixtures of materials and in particular containing fibers, managed to get caught between the blade and said bottom wall of the bucket.
  • the power required to drive the mixing and / or dispensing member then increases in proportions ranging from single to double or more. It even happens that the driving motor (s) of the mixing member and / or distribution wedge (s).
  • the applicant thus sought a solution to prevent jamming of the material between the blades of the mixing and / or dispensing member and the rounded bottom wall of the bucket of the bucket, and thus sought to reduce the power required to drive in rotation and in use this mixing and / or dispensing member.
  • a bucket comprising a bucket delimited by a rounded bottom wall, along which extends a mixing and / or distribution member rotatably mounted within said bucket, said member comprising blades for moving the material, the blades being provided with a peripheral edge forming a helical sector;
  • the blades comprise retractable scrapers bearing said peripheral edge and intended to avoid, during the rotation of said member, the jamming of the material likely to be contained in the bucket, between said peripheral edge of the scrapers and said wall of rounded bottom.
  • the scrapers can then move apart to prevent jamming of the material between the rounded bottom wall of the bucket and the blades.
  • the pressure exerted by the scrapers on the rounded bottom wall is reduced.
  • the power required to carry out the drive of the mixing and / or dispensing member is notoriously lowered.
  • each scraper consists of at least one plate fixed on the periphery of said blade, via at least one fitting.
  • the plates can be replaced if necessary.
  • each scraper of a blade consists of two half-parts whose active parts are separated at a plane of symmetry of the blade passing through the axis of the mixing member. and / or distribution.
  • Each shorter half-scraper deforms independently.
  • a gap also remains between the two half-scrapers to evacuate more easily the worked material that is likely to get caught between the two half-parts of the scraper and the rounded bottom wall of the bucket.
  • each fitting comprises a wall provided with a rectilinear rim around which can pivot a scraper, a half-scraper.
  • a second wall extends obliquely and outwardly the first wall, so as to serve as seat scraper, half-scraper, to limit its inclination in operation.
  • each scraper By limiting its inclination during its retraction, it limits the deformation of each scraper, each half-scraper, and therefore increases the number of theoretical cycles they can support.
  • the two walls are connected by a radiated wall.
  • This radiated wall then makes it possible to accompany locally the scraper, the half-scraper, during its inclination by forcing it to wind at its base in order to limit the internal tensions in this highly mechanically stressed part.
  • the number of deformation cycles of the scraper, half-scraper, is thus increased.
  • a pair of brackets is disposed symmetrically on either side of each scraper, each half-scraper.
  • the two fittings act identically in both sides of the folding of each scraper, each half-scraper, regardless of the direction of rotation of the blades.
  • the two points of the scraper are a few centimeters away from the rounded bottom wall of the scoop, so that one of them, depending on the direction of rotation of the blades, can penetrate progressively the material, when it fits into the trough formed by said rounded bottom wall.
  • the scraper separates the material better in the trough. A smaller amount of material creeps between the scrapers and the trough. This also results in reduced tip wear.
  • each scraper, each half-scraper is made of a less rigid material than that which constitutes the complementary part of the corresponding blade.
  • the material consisting for example of an elastomer, is deformed and passes the material that is worked in the bucket, between its rounded bottom wall and the periphery of the scraper.
  • each blade comprises two half-blades turned facing each other and assembled mutually, each half-blade comprising a first pan forming a portion of an active part of the blade, a second half forming a connecting wall with the other half-blade, the scraper, the two half-scrapers, being secured (s) of the two half-blades.
  • the blade of the invention is relatively economical to manufacture.
  • the blade has an increased level of rigidity due to the double thickness of the junction zone of the two half-blades.
  • the blade does not require a gusset to strengthen its connection with the shaft.
  • a half-scraper is fixed on one side of the active part of a half-blade and the other half-scraper is fixed on the other side of the active part of the other half-blade.
  • each pan is flat.
  • each half-blade consists of a folded sheet metal plate.
  • the free lateral edge of the second part of a half-blade is welded to the first part of the other half-blade and vice versa.
  • the manufacture of a blade is performed by a mutual welding operation of the two half-blades arranged vis-à-vis.
  • the angular offset between the blades is such that only one blade penetrates both into the trough delimited by the bottom wall of said bucket.
  • the rounded bottom wall of the bucket is secant with a front wall and / or a back wall, the bucket being also delimited by two side walls, at least one of these side walls being passage through an opening, a closure door that can close or release said opening under the effect of the operation of an actuator.
  • the bucket By making two openings respectively through the two side walls, and by equipping the bucket with two closing hatches, the bucket can indifferently pour its content on the left side, the right side or simultaneously on both sides.
  • Bucket 10 incorporating a mixing member and / or distribution 100 of a material or a mixture of materials. Bucket 10 is capable of mixing material, of dispensing it or of carrying out these two operations consecutively.
  • It comprises a loading / unloading bucket 12 delimited by a rounded bottom wall 20, a front wall 22, a back wall 24, two side walls 26a and 26b. At least one of the side walls is traversed by an opening.
  • a closure flap 28 can close or release this opening through an actuator 30, such as a hydraulic cylinder.
  • the member 100 consists of a shaft 110 and around which is fixed, radially, a plurality of blades 120 for stirring the material by moving laterally, to mix, distribute it.
  • the member 100 is mounted horizontally between the two side walls 26 of the bucket 10, and parallel to its bottom wall rounded 20. It can be rotated by means of at least one motor, a geared motor, so that it can mix the material contained in the bucket and distribute it, if necessary, through the open opening .
  • Each blade 120 is constituted on the Fig. 4 , two half-blades 130a and 130b, turned vis-à-vis so as to be able to assemble each other when they are brought into contact with each other. They are advantageously identical.
  • Each half-blade 130 is constituted, on the Fig. 5 , a plate comprising a first panel 140, a second panel 160.
  • the two panels 140 and 160 are formed of flat walls. The two sides are not parallel. They form between them an obtuse angle ⁇ .
  • the angle ⁇ formed between the two sides 140 and 160 is between 110 ° and 150 °.
  • Each half-blade 130 is advantageously manufactured in one piece.
  • the plate is made of a rigid material, such as steel.
  • the half-blade 130 is cut in a sheet, then it is folded to form its two sides 140 and 160 around a fold 131, here consisting of a rounded portion.
  • the two panels 140 and 160 constituting each half-blade 130 are separate parts and they are assembled by welding at two contiguous edges.
  • the two sides are coplanar pieces joined or are formed of a single coplanar piece, that is to say which is devoid of fold.
  • the first pan 140 of a half-blade is intended to form half of the active portion of the blade 120 while its second pan 160 is intended to be secured to the second half-blade to form a particularly rigid blade structure and effective.
  • the second section of the second half-blade is also secured in the same way with the first half-blade.
  • the first panel 140 thus comprises a pallet 141 driving the material which is extended by a wall 142 of thinned width intended to connect it with the shaft.
  • the pallets 141 thus constitute the active part of the blade while the walls 142 constitute the connecting part of the blade with the shaft 110.
  • This connecting wall 142 of smaller width facilitates the reflux of the material between the blades during the mixing phase, the mixing phases of the material.
  • the pallet 141 is delimited by a rounded peripheral edge 143 whose radius O is centered on the axis of the shaft 110 when viewed from its end, a side edge located on the other side of the fold 131 defining the two free sides 140, 160, and which is hollowed by a notch 144 thus defining said connecting wall.
  • the peripheral edge 143 forms in practice a helical sector, due to the non-zero pitch of the pad described hereinafter.
  • the rounded peripheral edge 143 rotates in the bucket at a short distance from its bottom wall, so that the blades can act on the material to mix it, but especially to discharge it.
  • the absence of contact limits the wear of the peripheral edges of the bottom wall.
  • the second panel 160 consists of a wall of triangular shape and whose sharpest peak is located at the intersection of the fold 131 and the peripheral edge 143 rounded. Its free lateral edge 162 also joins said vertex.
  • the radius of this rounded wall is generally centered in the extension of the fold 131 .
  • At least one end of the shaft 110 is extended by means of a sleeve 112 in which can take place, without touching, a receiving pot of said drive motor to be fixed on a corresponding side wall.
  • At least one blade 120 is fixed around said sleeve so that it can work over the entire internal width of the bucket.
  • Said end of the shaft 110 is integral with a flange 114 which is fixed, preferably by bolting, on said sleeve 112 so as to facilitate the installation of the mixing and / or dispensing member 100 or allow it to be dismantled, for example, as part of a maintenance operation.
  • the pitch of the blade 120 is defined by the angle ⁇ formed between the peripheral edge 143 and a direction normal to the axis of the shaft 110 when it is positioned by its rounded walls 150 on the cylindrical wall of the shaft 110.
  • the pitch of the blade 120 is non-zero. It is advantageously between 10 ° and 70 °.
  • the axis of the rounded walls 150 is offset from the peripheral edge 143, the angle ⁇ plus 90 °.
  • the value of this angle, defining the pitch of the blade is between 110 ° and 170 °.
  • the zone of junction of the blade 120 with the shaft 110 has a rhomboid geometry which diminishes, because of the triangular geometry of the second panels, from its foot D to the approach of its peripheral edge 143
  • the wedge shape located on either side of the blade, and which is turned in the direction of advance and / or reflux of the material in the bucket facilitates the penetration of the blade in said material .
  • the efficiency of the mixing and / or dispensing member is increased compared with that described in the introduction to the present application.
  • the blade has a symmetrical structure so that the operation of the mixing and / or distribution member remains identical in one or the other of its two directions of rotation.
  • the four sections of the blade form a box of pyramidal structure giving it a relatively high rigidity.
  • the quadratic moment of such a hollow envelope is greater than that of a blade of the type comprising a flat central core on which are fixed two wings, and this for the same wall thickness. It is no longer necessary to use a reinforcing gusset, because of the widening of the blade root 120 at its junction zone with the shaft 110.
  • the two half-blades are assembled at an overlapping zone, and which is relatively large at the junction zone of the blade with the tree. This overlap increases, although to a lesser extent than that of the boxed blade, the quadratic moment of the blade.
  • the different blades 120 are successively placed on the shaft 110 so that they rest on it by their rounded walls 150, positioning them, for example, using a template. These rounded walls 150 are then welded to the shaft 110.
  • the weld bead is indicated by the symbol S.
  • the width of the root D of the blade 120 is substantially equal to or greater than the diameter of the shaft 110.
  • the thickness of the foot of the blade is substantially equal to half of its width.
  • the relatively large contact area between the blade and the shaft provides a particularly rigid connection between these two components, conducive to achieving a level of reliability satisfactory in time of the mixing member and / or distribution.
  • the blade 120 which is presented benefits from an arrangement also intended to reduce the power required to rotate and drive, a mixing and / or distribution member equipped with a plurality of such blades.
  • This improvement can be used with the blade of the invention described above or with all the blades mounted on a shaft and which constitute a mixing member and / or distribution.
  • each blade does not touch the trough bottom wall as it flows in this portion of the bucket to limit the wear of the blade or said bottom wall.
  • the blade 120 includes at the periphery a scraper 170 of a particular structure and which is delimited at least locally by a peripheral edge 143. It is manufactured in a less rigid material than that which constitutes the other part of the blade. It is delimited at its periphery by a radius O centered on the tree 110 which supports the blade 120 when looking at said shaft by its end. Due to the pitch of the blade, the peripheral edge 143 has a helical portion geometry.
  • This scraper 170 is then capable of deforming at its periphery, because of the oblique position of the blade due to its pitch, during its trajectory against the rounded bottom to avoid jamming the material between the blade and said bottom wall .
  • the material that refuses to be displaced deforms the scraper 170 and escapes under the blade backward of its trajectory.
  • the scraper thus forms a means of retraction which laterally deviates by deforming under the effect of the pressure of the material.
  • the scraper 170 constitutes the entire length of the peripheral edges 143. Its height decreases at the tips of the pallets 141. It is manufactured in a plate of an elastomeric material, for example polyurethane, incorporating, preferably , a reinforcement mesh of its structure to avoid tearing with use. It is arranged in a clearance 122 excavating the periphery of the blade between the tips of the pallets 141. The scraper 170 is fixed in this clearance, for example by pinching.
  • the scraper 170 consists of two plates 171 whose active part has a rounded edge and whose radius O is centered on the axis of the shaft 110.
  • the two plates 171 are respectively fixed on either side of the two pallets 141.
  • Each plate is fixed by means of at least one fitting 180 retained on the pallet by bolts 182, passing through holes made through the plate and said fitting, so as to pinch the inner edge 172 scraper 170 on a corresponding pallet 141.
  • At least one first fitting 180 thus clamps on one side a plate 141 on a pallet 141, and at least one second fitting 180 clamps on the other side, the other plate 171 on the other pallet 141.
  • the angular offset between the blades 120 is such that only one blade penetrates both into the trough delimited by the bottom wall 20 of the bucket 12 of the bucket 10. Less power is required to drive the load. mixing member 100 and / or distribution.
  • the "barrel effect" is avoided, that is to say the training in a single block of certain materials deemed difficult to mix, to distribute, by the mixing and / or dispensing member.
  • the maximum value of the engine torque necessary for driving the mixing and / or dispensing member 100 is reduced.
  • the blades of the mixing and / or dispensing member of the invention reduce the power required to move such a mixing and / or dispensing member into service.
  • the scraper 170 is constituted by a single plate 171 whose active part has a geometry in a circle segment and whose periphery forms a portion of helicoid.
  • the plate is fixed in the extension of the two pallets 141 by means of at least one fitting 180 fixed by bolts 182, passing through holes formed through the two pallets and the fitting, so as to pinch the inner edge of the scraper 170 on the two pallets 141.
  • the scraper 170 can be traversed by holes through which pads from at least one fitting take place to hold it.
  • each bracket 180a and 180b is provided with a rectilinear fold around which the scraper 170 can fold normally retracting.
  • the deformation of the scraper 170 is the least constraining for its structure. This significantly increases the life of the scraper.
  • Each bracket 180a, 180b comprises a first flat wall 181 sandwiching the scraper 170 against an identical wall of the other fitting, a second wall 183 preferably flat, which extends from the top and obliquely outwards, the first wall 181.
  • This second wall 183 and serves as seat scraper 170 to limit its inclination in operation and therefore to limit its deformation.
  • the inside angle ⁇ formed by the two walls 181 and 183 is preferably obtuse for this purpose.
  • the two walls 181 and 183 are connected by a radially walled wall 184.
  • This radiated wall then makes it possible to accompany the scraper locally during its inclination by forcing it to wind up at its base in order to limit the internal stresses in this most mechanically solicited. The number of deformation cycles of the scraper is thus increased.
  • the two fittings 180a, 180b are arranged symmetrically on either side of the scraper 170, to provide identical operation of the blade in both directions of rotation of the mixing member and / or distribution.
  • the outer tips of the two fittings 180 extend to the outer ends of the scraper 170 to protect it from wear during blade work.
  • the bucket 10 incorporates a mixing member 100 and / or distribution which is equipped with a plurality of blades 120.
  • Each blade 120 is provided, in particular, with a scraper 170 which is formed of two half-parts 170a and 170b . They are preferably separated at a median plane intersecting with the axis 110 carrying the blades.
  • the active part of a scraper When the active part of a scraper is built in one piece, it deforms laterally as it retracts under the pressure of the material worked. Its central zone undergoes more stress than at its two ends because of its greater height. Also, by separating the active part of the scraper into two half-parts of length reduced by half, they deform independently.
  • each half-scraper at least one fitting 180 provided with a rectilinear fold around which the half-scraper can fold back normally retracting.
  • the relatively short length of the fitting makes it possible to maintain a substantially constant height of the half-scraper about two-thirds of its length.
  • each half-portion of the scraper 170 is sandwiched in its lower part between two elements 180a, 180b constituting a pair of fittings 180.
  • the pair 180, each half-scraper corresponding, are fixed against the pallet 141 of a half-blade 130, for example by means of bolts 182 through the sandwiched zone.
  • Each bracket 180a, 180b comprises a first flat wall 181 sandwiching the half-scraper 170a against an identical wall of the other fitting, a second wall 183 preferably flat, which extends from the top and obliquely outwards the first wall 181.
  • This second wall 183 and serves as a seat half-scraper 170a to limit its inclination in operation and therefore to limit its deformation.
  • the inside angle ⁇ formed by the two walls 181 and 183 is preferably obtuse for this purpose.
  • the two walls 181 and 183 are connected by a radially walled wall 184.
  • This radiated wall then makes it possible to locally accompany the half-scraper during its inclination by forcing it to wind at its base in order to limit the internal tensions in this part. the most mechanically stressed. The number of deformation cycles of the scraper is thus increased.
  • the two fittings 180a, 180b of each pair are arranged symmetrically on either side of each half-scraper 170a, 170b, to provide identical operation of the blade in both directions of rotation of the mixing member and / or of distribution.
  • the half-scraper 170a is fixed on one side of the pallet 141 of a half-blade and the other half-scraper 170b is fixed on the other side of the pallet 141 of the other half-blade.
  • the two half-scrapers are also arranged symmetrically with respect to a median plane of the secant blade at its axis of rotation. In this way, we obtain, again an identical operation of the blade in both directions of rotation of the mixing member and / or distribution.
  • the outer tips of the two pairs of fittings 180 extend to the outer ends of the scraper to protect it from wear during blade work.
  • the scraper 170 consists of two separate plates 171a and 171b.
  • the two tips 175 of the scraper 170 are connected to the peripheral edge 143 rounded by a radius smaller than the radius O of this peripheral edge 143, so as to be a few centimeters away from the rounded bottom wall 20 of the bucket.
  • one of the points 175 of the scraper gradually penetrates the material, when it fits into the trough formed by the rounded bottom wall 20 of the bucket of the bucket.
  • the scraper separates the material better in the trough. A smaller amount of material creeps between the scrapers and the trough. This also results in reduced wear of the scraper tips.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Shovels (AREA)
  • Accessories For Mixers (AREA)

Abstract

The drive unit i.e. blade (120) has a scraper (170) intended to avoid jamming of a material, likely to be contained in a bucket, between a peripheral edge (143) of the blade and a material retaining wall during rotation of the blade. The scraper is manufactured of an elastomer material that is less rigid than that of a part complementary to the blade, where the peripheral edge of the blade is delimited by a radius (O) centered on an axis of a shaft of a mixing and/or distribution system. The scraper includes a plate fixed on the blade via fittings (180). An independent claim is also included for a bucket.

Description

La présente invention se rapporte à un godet dont la benne incorpore un organe de mélange et/ou de distribution d'une matière.The present invention relates to a bucket whose bucket incorporates a mixing member and / or distribution of a material.

La benne d'un tel godet est destinée à contenir ladite matière à mélanger, à distribuer, ainsi qu'un organe rotatif disposé le long de sa paroi de fond arrondie formant auget pour mélanger la matière et/ou la distribuer au travers d'une ouverture pratiquée dans une paroi latérale du godet et qui est fermée normalement par une trappe mobile entre une position d'ouverture et une position de fermeture.The bucket of such a bucket is intended to contain said material to be mixed, to be dispensed, and a rotary member disposed along its rounded bottom wall forming a bucket to mix the material and / or distribute it through a opening made in a side wall of the bucket and which is normally closed by a hatch movable between an open position and a closed position.

Un tel organe est décrit dans la demande de brevet français n° 10 53000 . Il se compose sur les Figs. 1 et 2, d'un arbre A susceptible d'être monté à rotation entre les deux parois latérales d'un godet, parallèlement à sa paroi de fond, et autour duquel est montée une pluralité de moyens d'entraînement de la matière et qui se présentent ici sous la forme de pales P. Chaque pale P est constituée d'une paire d'ailes L1, L2 attenantes de part et d'autre d'une âme centrale C solidaire de l'arbre. Celle-ci présente, en vue de face, une structure de plaque plane de géométrie triangulaire et dont la largeur s'amenuise en direction de la périphérie de la pale P, pour recevoir de chaque côté de sa partie terminale en pointe, la paire d'ailes L1 et L2. L'âme centrale C est fixée sur l'arbre A par soudage. Chaque aile L présente en vue de face, une géométrie triangulaire dont la bordure périphérique est délimitée par un rayon O centré sur l'axe de l'arbre A. Une échancrure creuse le bord latéral libre pour faciliter le reflux de la matière entre les pales, alors que son autre bord latéral est fixé sur l'âme centrale C par soudage. Un gousset G radial traverse l'âme centrale dans sa partie médiane en étant lié à celle-ci par soudage pour accroître la rigidité latérale de la pale nécessaire pendant son fonctionnement, du fait de son incidence.Such an organ is described in French patent application no. 10 53000 . It is composed on the Figs. 1 and 2 , A shaft A rotatable between the two side walls of a bucket, parallel to its bottom wall, and around which is mounted a plurality of means for driving the material and which are here in the form of blades P. Each blade P consists of a pair of wings L1, L2 adjoining on either side of a central core C integral with the shaft. It has, in front view, a flat plate structure of triangular geometry and whose width decreases towards the periphery of the blade P, to receive on each side of its tip end portion, the pair of wings L1 and L2. The central core C is fixed on the shaft A by welding. Each wing L present in front view, a triangular geometry whose peripheral edge is delimited by a radius O centered on the axis of the shaft A. A notch digs the free lateral edge to facilitate the reflux of the material between the blades, while its other lateral edge is fixed on the central core C by welding. A radial gusset G traverses the central core in its middle part by being bonded thereto by welding to increase the lateral rigidity of the blade required during its operation, because of its incidence.

L'axe de l'arbre A est centré sur celui de la paroi de fond arrondie du godet. En fonctionnement, la bordure périphérique de la pale circule à faible distance de cette paroi de fond pour limiter l'usure de la pale ou de ladite paroi de fond. Le demandeur a constaté que certaines matières ou mélanges de matières et en particulier contenant des fibres, parvenaient à se coincer entre la pale et ladite paroi de fond du godet. La puissance nécessaire à l'entraînement de l'organe de mélange et/ou de distribution augmente alors dans des proportions allant du simple au double, voire davantage. Il arrive même que le(s) moteur(s) d'entraînement de l'organe de mélange et/ou de distribution cale(nt).The axis of the shaft A is centered on that of the round bottom wall of the bucket. In operation, the peripheral edge of the blade travels a short distance from this bottom wall to limit the wear of the blade or said bottom wall. The applicant has found that certain materials or mixtures of materials and in particular containing fibers, managed to get caught between the blade and said bottom wall of the bucket. The power required to drive the mixing and / or dispensing member then increases in proportions ranging from single to double or more. It even happens that the driving motor (s) of the mixing member and / or distribution wedge (s).

Le demandeur a ainsi cherché une solution pour éviter le coincement de la matière entre les pales de l'organe de mélange et/ou de distribution et la paroi de fond arrondie de la benne du godet, et ainsi cherché à réduire la puissance nécessaire pour entraîner à rotation et en service cet organe de mélange et/ou de distribution.The applicant thus sought a solution to prevent jamming of the material between the blades of the mixing and / or dispensing member and the rounded bottom wall of the bucket of the bucket, and thus sought to reduce the power required to drive in rotation and in use this mixing and / or dispensing member.

A cet effet, est proposé un godet comprenant une benne délimitée par une paroi de fond arrondie, le long de laquelle s'étend un organe de mélange et/ou de distribution monté à rotation à l'intérieur de ladite benne, ledit organe comprenant des pales destinées à déplacer la matière, les pales étant pourvues d'un bord périphérique formant un secteur d'hélicoïde ; selon l'invention, les pales comportent des racloirs escamotables portant ledit bord périphérique et destinés à éviter, pendant la rotation dudit organe, le coincement de la matière susceptible d'être contenue dans la benne, entre ledit bord périphérique des racloirs et ladite paroi de fond arrondie.For this purpose, there is provided a bucket comprising a bucket delimited by a rounded bottom wall, along which extends a mixing and / or distribution member rotatably mounted within said bucket, said member comprising blades for moving the material, the blades being provided with a peripheral edge forming a helical sector; according to the invention, the blades comprise retractable scrapers bearing said peripheral edge and intended to avoid, during the rotation of said member, the jamming of the material likely to be contained in the bucket, between said peripheral edge of the scrapers and said wall of rounded bottom.

Les racloirs peuvent alors s'écarter pour éviter le coincement de la matière entre la paroi de fond arrondie du godet et les pales. La pression qu'exercent les racloirs sur la paroi de fond arrondie est réduite. La puissance nécessaire pour réaliser l'entraînement de l'organe de mélange et/ou de distribution est notoirement abaissée.The scrapers can then move apart to prevent jamming of the material between the rounded bottom wall of the bucket and the blades. The pressure exerted by the scrapers on the rounded bottom wall is reduced. The power required to carry out the drive of the mixing and / or dispensing member is notoriously lowered.

Selon une caractéristique additionnelle de l'invention, chaque racloir est constitué d'au moins une plaque fixée sur la périphérie de ladite pale, par l'intermédiaire d'au moins une ferrure.According to an additional feature of the invention, each scraper consists of at least one plate fixed on the periphery of said blade, via at least one fitting.

Les plaques peuvent être remplacées le cas échéant.The plates can be replaced if necessary.

Selon une caractéristique additionnelle de l'invention, chaque racloir d'une pale est constitué de deux demi-parties dont les parties actives sont séparées au niveau d'un plan de symétrie de la pale passant par l'axe de l'organe de mélange et/ou de distribution.According to an additional characteristic of the invention, each scraper of a blade consists of two half-parts whose active parts are separated at a plane of symmetry of the blade passing through the axis of the mixing member. and / or distribution.

Chaque demi-racloir plus court se déforme indépendamment. Un interstice subsiste également entre les deux demi-racloirs permettant d'évacuer plus facilement la matière travaillée qui est susceptible de se coincer entre les deux demi-parties du racloir et la paroi de fond arrondie du godet.Each shorter half-scraper deforms independently. A gap also remains between the two half-scrapers to evacuate more easily the worked material that is likely to get caught between the two half-parts of the scraper and the rounded bottom wall of the bucket.

Selon une caractéristique additionnelle de l'invention, chaque ferrure comprend une paroi pourvue d'un rebord rectiligne autour duquel peut pivoter un racloir, un demi-racloir.According to an additional characteristic of the invention, each fitting comprises a wall provided with a rectilinear rim around which can pivot a scraper, a half-scraper.

En pouvant pivoter autour d'une génératrice, la déformation par pliement du racloir, du demi-racloir, le long d'une droite, est moins contraignante pour sa structure. On augmente ainsi notablement la durée de vie du racloir.Being able to pivot around a generator, the deformation by folding of the scraper, the half-scraper, along a straight line, is less restrictive for its structure. This significantly increases the life of the scraper.

Selon une caractéristique additionnelle de l'invention, une seconde paroi prolonge de manière oblique et vers l'extérieur la première paroi, de sorte à servir d'assise au racloir, au demi-racloir, pour limiter son inclinaison en fonctionnement.According to an additional feature of the invention, a second wall extends obliquely and outwardly the first wall, so as to serve as seat scraper, half-scraper, to limit its inclination in operation.

En limitant son inclinaison pendant son escamotage, on limite la déformation de chaque racloir, de chaque demi-racloir, et par conséquent on accroît le nombre de cycles théoriques qu'ils peuvent supporter.By limiting its inclination during its retraction, it limits the deformation of each scraper, each half-scraper, and therefore increases the number of theoretical cycles they can support.

Selon une caractéristique additionnelle de l'invention, les deux parois sont raccordées par une paroi rayonnée.According to an additional feature of the invention, the two walls are connected by a radiated wall.

Cette paroi rayonnée permet alors d'accompagner localement le racloir, le demi-racloir, pendant son inclinaison en l'obligeant à s'enrouler à sa base afin de limiter les tensions internes dans cette partie très sollicitée mécaniquement. Le nombre de cycles de déformation du racloir, demi-racloir, est ainsi accru.This radiated wall then makes it possible to accompany locally the scraper, the half-scraper, during its inclination by forcing it to wind at its base in order to limit the internal tensions in this highly mechanically stressed part. The number of deformation cycles of the scraper, half-scraper, is thus increased.

Selon une caractéristique additionnelle de l'invention, une paire de ferrures est disposée symétriquement de part et d'autre de chaque racloir, de chaque demi- racloir.According to an additional feature of the invention, a pair of brackets is disposed symmetrically on either side of each scraper, each half-scraper.

Les deux ferrures agissent à l'identique dans les deux côtés du repliement de chaque racloir, de chaque demi-racloir, indifféremment du sens de rotation des pales.The two fittings act identically in both sides of the folding of each scraper, each half-scraper, regardless of the direction of rotation of the blades.

Selon une caractéristique additionnelle de l'invention, les deux pointes du racloir sont éloignées de quelques centimètres de la paroi de fond arrondie du godet, de sorte à ce que l'une d'elles, suivant le sens de rotation des pales, puisse pénétrer progressivement la matière, lorsqu'elle s'inscrit dans l'auge formée par ladite paroi de fond arrondie.According to an additional characteristic of the invention, the two points of the scraper are a few centimeters away from the rounded bottom wall of the scoop, so that one of them, depending on the direction of rotation of the blades, can penetrate progressively the material, when it fits into the trough formed by said rounded bottom wall.

Le racloir sépare mieux la matière dans l'auge. Une quantité moindre de matière s'insinue entre les racloirs et l'auge. Il en résulte également une usure réduite de la pointe.The scraper separates the material better in the trough. A smaller amount of material creeps between the scrapers and the trough. This also results in reduced tip wear.

Selon une caractéristique additionnelle de l'invention, chaque racloir, chaque demi-racloir est fabriqué dans un matériau moins rigide que celui qui constitue la partie complémentaire de la pale correspondante.According to an additional feature of the invention, each scraper, each half-scraper is made of a less rigid material than that which constitutes the complementary part of the corresponding blade.

Le matériau, constitué par exemple d'un élastomère, se déforme et laisse passer la matière qui est travaillée dans la benne, entre sa paroi de fond arrondie et la périphérie du racloir.The material, consisting for example of an elastomer, is deformed and passes the material that is worked in the bucket, between its rounded bottom wall and the periphery of the scraper.

Selon une caractéristique additionnelle de l'invention, chaque pale comprend deux demi-pales tournées en vis-à-vis et assemblées mutuellement, chaque demi-pale comprenant un premier pan formant une portion d'une partie active de la pale, un second pan formant une paroi de liaison avec l'autre demi-pale, le racloir, les deux demi-racloirs, étant solidaire(s) des deux demi-pales.According to an additional feature of the invention, each blade comprises two half-blades turned facing each other and assembled mutually, each half-blade comprising a first pan forming a portion of an active part of the blade, a second half forming a connecting wall with the other half-blade, the scraper, the two half-scrapers, being secured (s) of the two half-blades.

Construite avec deux composants, la pale de l'invention est relativement économique à fabriquer.Built with two components, the blade of the invention is relatively economical to manufacture.

La pale présente un niveau de rigidité accru grâce à la double épaisseur de la zone de jonction des deux demi-pales. La pale ne nécessite pas de gousset pour renforcer sa liaison avec l'arbre.The blade has an increased level of rigidity due to the double thickness of the junction zone of the two half-blades. The blade does not require a gusset to strengthen its connection with the shaft.

Selon une caractéristique additionnelle de l'invention, un demi-racloir est fixé d'un côté de la partie active d'une demi-pale et l'autre demi-racloir est fixé de l'autre côté de la partie active de l'autre demi-pale.According to an additional characteristic of the invention, a half-scraper is fixed on one side of the active part of a half-blade and the other half-scraper is fixed on the other side of the active part of the other half-blade.

On obtient, là encore un fonctionnement identique de la pale dans les deux sens de rotation de l'organe de mélange et/ou de distribution.Here again we obtain an identical operation of the blade in the two directions of rotation of the mixing and / or dispensing member.

Selon une caractéristique additionnelle de l'invention, la géométrie de chaque pan est plane.According to an additional feature of the invention, the geometry of each pan is flat.

Il peut être fabriqué dans une simple plaque de matière.It can be made in a simple plate of material.

Selon une caractéristique additionnelle de l'invention, chaque demi-pale est constituée d'une plaque de tôle pliée.According to an additional feature of the invention, each half-blade consists of a folded sheet metal plate.

Sa fabrication est relativement économique.Its manufacture is relatively economical.

Selon une caractéristique additionnelle de l'invention, le bord latéral libre du second pan d'une demi-pale est soudé sur le premier pan de l'autre demi-pale et réciproquement.According to an additional characteristic of the invention, the free lateral edge of the second part of a half-blade is welded to the first part of the other half-blade and vice versa.

La fabrication d'une pale est réalisée par une opération de soudage mutuel des deux demi-pales disposées en vis-à-vis.The manufacture of a blade is performed by a mutual welding operation of the two half-blades arranged vis-à-vis.

Selon une caractéristique additionnelle de l'invention, le décalage angulaire entre les pales est tel qu'une seule pale pénètre à la fois dans l'auge délimitée par la paroi de fond de ladite benne.According to an additional feature of the invention, the angular offset between the blades is such that only one blade penetrates both into the trough delimited by the bottom wall of said bucket.

Le couple maximum nécessaire pour entraîner à rotation et en service l'organe de mélange et/ou de distribution est réduit.The maximum torque required to rotate and operate the mixing and / or dispensing member is reduced.

Selon une caractéristique additionnelle de l'invention, la paroi de fond arrondie de la benne est sécante avec une paroi frontale et/ou une paroi dorsale, la benne étant délimitée également par deux parois latérales, au moins l'une de ces parois latérales étant traversée d'une ouverture, une trappe de fermeture pouvant refermer ou dégager ladite ouverture sous l'effet du fonctionnement d'un organe de manoeuvre.According to an additional feature of the invention, the rounded bottom wall of the bucket is secant with a front wall and / or a back wall, the bucket being also delimited by two side walls, at least one of these side walls being passage through an opening, a closure door that can close or release said opening under the effect of the operation of an actuator.

En réalisant deux ouvertures respectivement au travers des deux parois latérales, et en équipant le godet de deux trappes de fermeture, le godet peut indifféremment déverser son contenu du côté gauche, du côté droit ou simultanément des deux côtés.By making two openings respectively through the two side walls, and by equipping the bucket with two closing hatches, the bucket can indifferently pour its content on the left side, the right side or simultaneously on both sides.

Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'un exemple de réalisation, ladite description étant faite en relation avec les dessins joints, parmi lesquels:

  • la Fig. 1 représente une vue de face d'un organe de mélange et/ou de distribution d'un art antérieur susceptible d'être monté dans un godet,
  • la Fig. 2 représente une vue d'extrémité d'un organe de mélange et/ou de distribution d'un art antérieur susceptible d'être monté dans un godet,
  • la Fig. 3 représente une vue en perspective d'un godet incluant un organe de mélange et/ou de distribution selon l'invention,
  • la Fig. 4 représente une vue éclatée en perspective d'une pale selon l'invention,
  • la Fig. 5 représente une vue de dessus d'une demi-pale selon l'invention,
  • la Fig. 6 représente une vue de dessus d'une pale assemblée et en position de soudage sur un arbre d'un organe de mélange et/ou de distribution selon l'invention,
  • la Fig. 7 représente une vue latérale d'une variante de réalisation d'une pale selon l'invention,
  • la Fig. 8 représente une vue en perspective d'une pale selon l'invention,
  • la Fig. 9 représente une vue en coupe transversale de la benne d'un godet orienté dans sa position de mélange incluant deux talons de retenue de la matière ainsi qu'un organe de mélange et/ou de distribution selon l'invention,
  • la Fig. 10 représente une vue de dessus de la benne d'un godet incluant deux talons de retenue de la matière ainsi qu'un organe de mélange et/ou de distribution selon l'invention,
  • la Fig. 11 représente une vue de face d'une seconde variante de réalisation d'une pale pour un godet selon l'invention,
  • la Fig. 12 représente une vue latérale d'une seconde variante de réalisation d'une pale pour un godet selon l'invention
  • la Fig. 13 représente une vue de face d'une troisième variante de réalisation d'une pale pour un godet selon l'invention,
  • la Fig. 14 représente une vue en coupe d'une troisième variante de réalisation d'une pale pour un godet selon l'invention,
  • la Fig. 15 représente une vue de dessus d'une troisième variante de réalisation d'une pale pour un godet selon l'invention et,
  • la Fig. 16 représente une vue de face de deux plaques constitutives d'une variante de réalisation d'un racloir selon l'invention.
The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being given in relation to the attached drawings, among which:
  • the Fig. 1 represents a front view of a mixing and / or dispensing member of a prior art that can be mounted in a cup,
  • the Fig. 2 represents an end view of a mixing and / or dispensing member of a prior art that can be mounted in a cup,
  • the Fig. 3 represents a perspective view of a bucket including a mixing and / or dispensing member according to the invention,
  • the Fig. 4 represents an exploded perspective view of a blade according to the invention,
  • the Fig. 5 represents a view from above of a half-blade according to the invention,
  • the Fig. 6 represents a top view of an assembled blade and in welding position on a shaft of a mixing and / or dispensing member according to the invention,
  • the Fig. 7 represents a side view of an embodiment variant of a blade according to the invention,
  • the Fig. 8 represents a perspective view of a blade according to the invention,
  • the Fig. 9 represents a cross-sectional view of the bucket of a bucket oriented in its mixing position including two retaining heels of the material and a mixing and / or dispensing member according to the invention,
  • the Fig. 10 represents a top view of the bucket of a bucket including two retaining heels of the material and a mixing and / or dispensing member according to the invention,
  • the Fig. 11 represents a front view of a second embodiment of a blade for a bucket according to the invention,
  • the Fig. 12 represents a side view of a second embodiment of a blade for a bucket according to the invention
  • the Fig. 13 represents a front view of a third embodiment of a blade for a bucket according to the invention,
  • the Fig. 14 represents a sectional view of a third embodiment of a blade for a bucket according to the invention,
  • the Fig. 15 represents a view from above of a third embodiment of a blade for a bucket according to the invention and,
  • the Fig. 16 represents a front view of two plates constituting an embodiment variant of a scraper according to the invention.

Sur la Fig. 3, est présenté un godet 10 incorporant un organe de mélange et/ou de distribution 100 d'une matière ou d'un mélange de matières. Le godet 10 est susceptible de mélanger de la matière, de la distribuer ou de mener à bien consécutivement ces deux opérations.On the Fig. 3 , there is shown a bucket 10 incorporating a mixing member and / or distribution 100 of a material or a mixture of materials. Bucket 10 is capable of mixing material, of dispensing it or of carrying out these two operations consecutively.

Il comprend une benne de chargement/déchargement 12 délimitée par une paroi de fond arrondie 20, une paroi frontale 22, une paroi dorsale 24, deux parois latérales 26a et 26b. Au moins l'une des parois latérales est traversée d'une ouverture. Une trappe de fermeture 28 peut refermer ou dégager cette ouverture grâce à un organe de manoeuvre 30, tel qu'un vérin hydraulique.It comprises a loading / unloading bucket 12 delimited by a rounded bottom wall 20, a front wall 22, a back wall 24, two side walls 26a and 26b. At least one of the side walls is traversed by an opening. A closure flap 28 can close or release this opening through an actuator 30, such as a hydraulic cylinder.

L'organe 100 se compose d'un arbre 110 et autour duquel est fixée, de manière radiale, une pluralité de pales 120 destinées à brasser la matière en la déplaçant latéralement, pour la mélanger, la distribuer. L'organe 100 est monté horizontalement entre les deux parois latérales 26 du godet 10, et parallèlement à sa paroi de fond arrondie 20. Il peut être entraîné à rotation par l'intermédiaire d'au moins un moteur, un motoréducteur, afin qu'il puisse mélanger la matière contenue dans le godet et la distribuer, le cas échéant, au travers de l'ouverture dégagée.The member 100 consists of a shaft 110 and around which is fixed, radially, a plurality of blades 120 for stirring the material by moving laterally, to mix, distribute it. The member 100 is mounted horizontally between the two side walls 26 of the bucket 10, and parallel to its bottom wall rounded 20. It can be rotated by means of at least one motor, a geared motor, so that it can mix the material contained in the bucket and distribute it, if necessary, through the open opening .

Chaque pale 120 est constituée sur la Fig. 4, de deux demi-pales 130a et 130b, tournées en vis-à-vis afin de pouvoir les assembler mutuellement lorsqu'elles sont mises en contact l'une de l'autre. Elles sont avantageusement identiques.Each blade 120 is constituted on the Fig. 4 , two half-blades 130a and 130b, turned vis-à-vis so as to be able to assemble each other when they are brought into contact with each other. They are advantageously identical.

Chaque demi-pale 130 est constituée, sur la Fig. 5, d'une plaque comprenant un premier pan 140, un second pan 160. Les deux pans 140 et 160 sont formés de parois planes. Les deux pans ne sont pas parallèles. Ils forment entre eux un angle α obtus. L'angle α formé entre les deux pans 140 et 160 est compris entre 110° et 150°.Each half-blade 130 is constituted, on the Fig. 5 , a plate comprising a first panel 140, a second panel 160. The two panels 140 and 160 are formed of flat walls. The two sides are not parallel. They form between them an obtuse angle α. The angle α formed between the two sides 140 and 160 is between 110 ° and 150 °.

Chaque demi-pale 130 est avantageusement fabriquée en une seule pièce. La plaque est fabriquée dans une matière rigide, comme de l'acier. Pour sa réalisation, la demi-pale 130 est découpée dans une tôle, puis elle est pliée de façon à former ses deux pans 140 et 160 autour d'un pli 131, constitué ici d'une portion arrondie.Each half-blade 130 is advantageously manufactured in one piece. The plate is made of a rigid material, such as steel. For its implementation, the half-blade 130 is cut in a sheet, then it is folded to form its two sides 140 and 160 around a fold 131, here consisting of a rounded portion.

Dans un deuxième mode de fabrication, non représenté, les deux pans 140 et 160, constitutifs de chaque demi-pale 130, sont des pièces distinctes et ils sont assemblés par soudage au niveau de deux bords jointifs.In a second method of manufacture, not shown, the two panels 140 and 160 constituting each half-blade 130, are separate parts and they are assembled by welding at two contiguous edges.

Dans un troisième mode de fabrication, non représenté, les deux pans sont des pièces coplanaires jointes ou sont formés d'une seule et même pièce coplanaire, c'est-à-dire qui est dépourvue de pli.In a third method of manufacture, not shown, the two sides are coplanar pieces joined or are formed of a single coplanar piece, that is to say which is devoid of fold.

Sur les Figs. 4 et 8, le premier pan 140 d'une demi-pale est destiné à former la moitié de la partie active de la pale 120 alors que son second pan 160 est destiné à être solidarisé avec la seconde demi-pale pour former une structure de pale particulièrement rigide et efficace. Le second pan de la seconde demi-pale est aussi solidarisé de la même manière avec la première demi-pale.On the Figs. 4 and 8 , the first pan 140 of a half-blade is intended to form half of the active portion of the blade 120 while its second pan 160 is intended to be secured to the second half-blade to form a particularly rigid blade structure and effective. The second section of the second half-blade is also secured in the same way with the first half-blade.

Le premier pan 140 comprend ainsi une palette 141 d'entraînement de la matière qui est prolongée par une paroi 142 de largeur amincie destinée à la relier avec l'arbre. Les palettes 141 constituent ainsi la partie active de la pale alors que les parois 142 constituent la partie de liaison de la pale avec l'arbre 110.The first panel 140 thus comprises a pallet 141 driving the material which is extended by a wall 142 of thinned width intended to connect it with the shaft. The pallets 141 thus constitute the active part of the blade while the walls 142 constitute the connecting part of the blade with the shaft 110.

Cette paroi de liaison 142 de largeur plus réduite facilite le reflux de la matière entre les pales pendant la phase de mélange, les phases de mélange de la matière. Une méthode de mélange avantageuse est décrite dans la demande de brevet n° 10 53000 .This connecting wall 142 of smaller width facilitates the reflux of the material between the blades during the mixing phase, the mixing phases of the material. An advantageous mixing method is described in patent application no. 10 53000 .

La palette 141 est délimitée par un bord périphérique 143 arrondi et dont le rayon O est centré sur l'axe de l'arbre 110 lorsqu'on le regarde par son extrémité, un bord latéral situé de l'autre côté du pli 131 délimitant les deux pans libres 140, 160, et qui est creusé par une échancrure 144 délimitant de la sorte ladite paroi de liaison. Le bord périphérique 143 forme en pratique un secteur d'hélicoïde, dû au fait du pas non nul de la pale décrit ci-après.The pallet 141 is delimited by a rounded peripheral edge 143 whose radius O is centered on the axis of the shaft 110 when viewed from its end, a side edge located on the other side of the fold 131 defining the two free sides 140, 160, and which is hollowed by a notch 144 thus defining said connecting wall. The peripheral edge 143 forms in practice a helical sector, due to the non-zero pitch of the pad described hereinafter.

En fonctionnement, le bord périphérique 143 arrondi tourne dans le godet à faible distance de sa paroi de fond, de sorte que les pales puissent agir sur la matière pour la mélanger, mais surtout pour la décharger. L'absence de contact limite l'usure des bords périphériques, de la paroi de fond.In operation, the rounded peripheral edge 143 rotates in the bucket at a short distance from its bottom wall, so that the blades can act on the material to mix it, but especially to discharge it. The absence of contact limits the wear of the peripheral edges of the bottom wall.

Le second pan 160 est constitué d'une paroi de forme triangulaire et dont le sommet le plus aigu est situé à l'intersection du pli 131 et du bord périphérique 143 arrondi. Son bord latéral libre 162 rejoint également ledit sommet.The second panel 160 consists of a wall of triangular shape and whose sharpest peak is located at the intersection of the fold 131 and the peripheral edge 143 rounded. Its free lateral edge 162 also joins said vertex.

Une paroi arrondie 150 de rayon r, égale à celui de l'arbre 110, est réalisée dans chaque demi-pale 130, à l'opposé du bord périphérique 143. Le rayon de cette paroi arrondie est globalement centré dans le prolongement du pli 131.A rounded wall 150 of radius r, equal to that of the shaft 110, is formed in each half-blade 130, opposite the peripheral edge 143. The radius of this rounded wall is generally centered in the extension of the fold 131 .

Sur la Fig. 3, au moins une extrémité de l'arbre 110 est prolongée par l'intermédiaire d'un manchon 112 dans lequel peut prendre place, sans le toucher, un pot de réception dudit moteur d'entraînement destiné à être fixé sur une paroi latérale correspondante. Au moins une pale 120, plus courte, est fixée autour dudit manchon pour que celle-ci puisse travailler sur toute la largeur interne de la benne. Ladite extrémité de l'arbre 110 est solidaire d'un flasque 114 qui est fixé, de préférence par boulonnage, sur ledit manchon 112 de sorte à faciliter la pose de l'organe de mélange et/ou de distribution 100 ou permettre son démontage, par exemple, dans le cadre d'une opération de maintenance.On the Fig. 3 at least one end of the shaft 110 is extended by means of a sleeve 112 in which can take place, without touching, a receiving pot of said drive motor to be fixed on a corresponding side wall. At least one blade 120, shorter, is fixed around said sleeve so that it can work over the entire internal width of the bucket. Said end of the shaft 110 is integral with a flange 114 which is fixed, preferably by bolting, on said sleeve 112 so as to facilitate the installation of the mixing and / or dispensing member 100 or allow it to be dismantled, for example, as part of a maintenance operation.

La fabrication de la pale 120 et sa fixation sur l'arbre 110 de l'organe de mélange et/ou de distribution se présentent de la façon suivante et en référence aux Figs. 4, 5 et 7 :

  • On découpe les demi-pales 130 dans une plaque de tôle plane. On plie chaque demi-pale en deux pans 140 et 160 formant entre eux un angle α obtus autour du pli 131. On assemble ensuite mutuellement deux demi-pales 130a et 130b en les plaçant en vis-à-vis de sorte que le bord latéral libre 162 d'une demi-pale soit placé contre le premier pan 140 de l'autre demi-pale et réciproquement. Les sommets les plus aigus des pans triangulaire 160 sont disposés de manière jointive, au niveau des deux demi-bords périphériques 143 de sorte à former une continuité entre ces deux demi-bords périphériques 143. On peut s'aider pour cela d'un gabarit et d'un tube de même diamètre que l'arbre. En position d'assemblage, les deux demi-pales 130a et 130b sont orientées, de préférence, perpendiculairement au tube du gabarit, en reposant sur leurs parois arrondies 150.
  • On assemble ensuite, et de préférence par soudage, les deux demi-pales ensemble pour construire la pale 120. On soude pour cela les bords latéraux 162 sur les premiers pans 140. On obtient de la sorte une pale 120 qui est prête à être solidarisée sur un arbre 110.
The manufacture of the blade 120 and its attachment to the shaft 110 of the mixing and / or dispensing member is as follows and with reference to Figs. 4 , 5 and 7 :
  • The half-blades 130 are cut in a flat sheet metal plate. Each half-blade is folded into two sections 140 and 160 forming between them an angle α obtuse around the fold 131. Two half-blades 130a and 130b are then mutually assembled by placing them in facing relation so that the lateral edge free 162 of a half-blade is placed against the first panel 140 of the other half-blade and reciprocally. The sharpest peaks of the triangular flaps 160 are arranged contiguously, at the level of the two peripheral half-edges 143 so as to form a continuity between these two peripheral half-edges 143. It can be used for this purpose a jig and a tube of the same diameter as the tree. In the assembly position, the two half-blades 130a and 130b are oriented, preferably, perpendicularly to the tube of the template, resting on their rounded walls 150.
  • Next, and preferably by welding, the two half-blades together to build the blade 120. To do this is welded the side edges 162 on the first panels 140. In this way, a blade 120 is obtained which is ready to be secured. on a tree 110.

Sur la Fig. 6, le pas de la pale 120 est défini par l'angle β formé entre le bord périphérique 143 et une direction normale à l'axe de l'arbre 110 lorsqu'elle est positionnée par ses parois arrondies 150 sur la paroi cylindrique de l'arbre 110. Le pas de la pale 120 est non nul. Il est compris avantageusement entre 10° et 70°.On the Fig. 6 the pitch of the blade 120 is defined by the angle β formed between the peripheral edge 143 and a direction normal to the axis of the shaft 110 when it is positioned by its rounded walls 150 on the cylindrical wall of the shaft 110. The pitch of the blade 120 is non-zero. It is advantageously between 10 ° and 70 °.

Dit autrement, l'axe des parois arrondies 150 est décalé du bord périphérique 143, de l'angle β plus 90°. Dans un mode de réalisation intéressant en termes d'efficacité de brassage et de distribution, la valeur de cet angle, définissant le pas de la pale, est comprise entre 110° et 170°.In other words, the axis of the rounded walls 150 is offset from the peripheral edge 143, the angle β plus 90 °. In an interesting embodiment in terms of mixing efficiency and distribution, the value of this angle, defining the pitch of the blade, is between 110 ° and 170 °.

On remarque sur les Figs. 6 et 7, que la zone de jonction de la pale 120 avec l'arbre 110 présente une géométrie en losange qui s'amenuise, du fait de la géométrie triangulaire des seconds pans, depuis son pied D jusqu'à l'approche de son bord périphérique 143. Ainsi en fonctionnement, la forme en coin située de part et d'autre de la pale, et qui est tournée dans la direction d'avancement et/ou de reflux de la matière dans le godet facilite la pénétration de la pale dans ladite matière. Le rendement de l'organe de mélange et/ou de distribution est accru par rapport à celui décrit en introduction de la présente demande.We notice on Figs. 6 and 7 , that the zone of junction of the blade 120 with the shaft 110 has a rhomboid geometry which diminishes, because of the triangular geometry of the second panels, from its foot D to the approach of its peripheral edge 143 Thus, in operation, the wedge shape located on either side of the blade, and which is turned in the direction of advance and / or reflux of the material in the bucket facilitates the penetration of the blade in said material . The efficiency of the mixing and / or dispensing member is increased compared with that described in the introduction to the present application.

Construite avec des demi-pales identiques, la pale présente une structure symétrique de sorte que le fonctionnement de l'organe de mélange et/ou de distribution demeure identique dans l'un ou l'autre de ses deux sens de rotation.Built with identical half-blades, the blade has a symmetrical structure so that the operation of the mixing and / or distribution member remains identical in one or the other of its two directions of rotation.

Par ailleurs, les quatre pans de la pale forment un caisson de structure pyramidale lui procurant une rigidité relativement élevée. En effet, le moment quadratique d'une telle enveloppe creuse est supérieur à celui d'une pale du type comprenant une âme centrale plane sur laquelle sont fixées deux ailes, et ceci pour une même épaisseur de paroi. Il n'est plus utile d'utiliser de gousset de renfort, du fait de l'élargissement du pied de la pale 120 au niveau de sa zone de jonction avec l'arbre 110.In addition, the four sections of the blade form a box of pyramidal structure giving it a relatively high rigidity. Indeed, the quadratic moment of such a hollow envelope is greater than that of a blade of the type comprising a flat central core on which are fixed two wings, and this for the same wall thickness. It is no longer necessary to use a reinforcing gusset, because of the widening of the blade root 120 at its junction zone with the shaft 110.

Dans le troisième mode de fabrication des demi-pales, et dont les pans sont coplanaires, les deux demi-pales sont assemblées au niveau d'une zone de chevauchement, et qui est relativement importante au niveau de la zone de jonction de la pale avec l'arbre. Ce chevauchement accroît, bien que dans une proportion moindre que celui de la pale caissonnée, le moment quadratique de la pale.In the third embodiment of half-blades, whose sides are coplanar, the two half-blades are assembled at an overlapping zone, and which is relatively large at the junction zone of the blade with the tree. This overlap increases, although to a lesser extent than that of the boxed blade, the quadratic moment of the blade.

On place successivement les différentes pales 120 sur l'arbre 110 de sorte qu'elles prennent appui sur celui-ci par leurs parois arrondies 150, en les positionnant, par exemple, à l'aide d'un gabarit. On soude alors ces parois arrondies 150 sur l'arbre 110. Le cordon de soudure est matérialisé par le symbole S. La largeur du pied D de la pale 120 est sensiblement égale ou supérieure au diamètre de l'arbre 110. L'épaisseur du pied de la pale est sensiblement égale à la moitié de sa largeur. La relativement grande surface de contact entre la pale et l'arbre procure une liaison particulièrement rigide entre ces deux composants, propice à obtenir un niveau de fiabilité satisfaisant dans le temps de l'organe de mélange et/ou de distribution.The different blades 120 are successively placed on the shaft 110 so that they rest on it by their rounded walls 150, positioning them, for example, using a template. These rounded walls 150 are then welded to the shaft 110. The weld bead is indicated by the symbol S. The width of the root D of the blade 120 is substantially equal to or greater than the diameter of the shaft 110. The thickness of the foot of the blade is substantially equal to half of its width. The relatively large contact area between the blade and the shaft provides a particularly rigid connection between these two components, conducive to achieving a level of reliability satisfactory in time of the mixing member and / or distribution.

Sur la Fig. 7, la pale 120 qui est présentée bénéficie d'un aménagement destiné également à réduire la puissance nécessaire pour entraîner à rotation et en charge, un organe de mélange et/ou de distribution équipé d'une pluralité de telles pales.On the Fig. 7 , the blade 120 which is presented benefits from an arrangement also intended to reduce the power required to rotate and drive, a mixing and / or distribution member equipped with a plurality of such blades.

Ce perfectionnement peut être utilisé avec la pale de l'invention décrite précédemment ou avec toutes les pales montées sur un arbre et qui sont constitutives d'un organe de mélange et/ou de distribution.This improvement can be used with the blade of the invention described above or with all the blades mounted on a shaft and which constitute a mixing member and / or distribution.

Le demandeur a en effet constaté que lorsqu'une pale entraînée à rotation pénètre dans l'auge formée par la paroi de fond arrondie de la benne d'un godet, certaines matières ou certains mélanges de matières et en particulier contenant des fibres, parvenaient à se coincer entre la pale et ladite paroi de fond. La puissance nécessaire à l'entraînement augmente alors dans des proportions allant du simple au double, voire davantage. Il arrive même que le(s) moteur(s) d'entraînement de l'organe de mélange et/ou de distribution cale(nt).The applicant has indeed found that when a blade driven to rotate enters the trough formed by the rounded bottom wall of the bucket of a bucket, certain materials or mixtures of materials and in particular containing fibers, managed to get caught between the blade and said bottom wall. The power required for training then increases in proportions ranging from one to two or more. It even happens that the driving motor (s) of the mixing member and / or distribution wedge (s).

Rappelons que dans l'invention, le bord périphérique de chaque pale ne touche pas la paroi de fond formant auge lorsqu'il circule dans cette partie du godet pour limiter l'usure de la pale ou de ladite paroi de fond.Remember that in the invention, the peripheral edge of each blade does not touch the trough bottom wall as it flows in this portion of the bucket to limit the wear of the blade or said bottom wall.

Pour pallier cet inconvénient, la pale 120 inclut en périphérie un racloir 170 d'une structure particulière et qui est délimité au moins localement par un bord périphérique 143. Il est fabriqué dans une matière moins rigide que celle qui constitue l'autre partie de la pale. Il est délimité à sa périphérie par un rayon O centré sur l'arbre 110 qui supporte la pale 120 lorsque l'on regarde ledit arbre par son extrémité. Du fait du pas de la pale, le bord périphérique 143 présente une géométrie en portion d'hélicoïde.To overcome this drawback, the blade 120 includes at the periphery a scraper 170 of a particular structure and which is delimited at least locally by a peripheral edge 143. It is manufactured in a less rigid material than that which constitutes the other part of the blade. It is delimited at its periphery by a radius O centered on the tree 110 which supports the blade 120 when looking at said shaft by its end. Due to the pitch of the blade, the peripheral edge 143 has a helical portion geometry.

Ce racloir 170 est alors capable de se déformer au niveau de sa périphérie, du fait de la position oblique de la pale due à son pas, pendant sa trajectoire contre le fond arrondi pour éviter de coincer la matière entre la pale et ladite paroi de fond. La matière qui refuse d'être déplacée déforme le racloir 170 et s'échappe sous la pale en arrière de sa trajectoire. Le racloir forme de la sorte un moyen d'escamotage qui s'écarte latéralement en se déformant sous l'effet de la pression de la matière.This scraper 170 is then capable of deforming at its periphery, because of the oblique position of the blade due to its pitch, during its trajectory against the rounded bottom to avoid jamming the material between the blade and said bottom wall . The material that refuses to be displaced deforms the scraper 170 and escapes under the blade backward of its trajectory. The scraper thus forms a means of retraction which laterally deviates by deforming under the effect of the pressure of the material.

Sur la Fig. 3, la déformation du racloir 170 est symbolisée par la flèche T pendant la rotation sous charge de l'organe 100 de mélange et/ou de distribution, celle-ci étant symbolisée par la flèche R.On the Fig. 3 , the deformation of the scraper 170 is symbolized by the arrow T during the rotation under load of the mixing member 100 and / or distribution, the latter being symbolized by the arrow R.

Sur la Fig. 7, le racloir 170 constitue l'entièreté de la longueur des bords périphériques 143. Sa hauteur s'amenuise au niveau des pointes des palettes 141. Il est fabriqué dans une plaque d'une matière élastomère, par exemple en polyuréthane, incorporant, de préférence, un treillis de renfort de sa structure pour éviter son déchirement à l'usage. Il est disposé dans un dégagement 122 creusant la périphérie de la pale entre les pointes des palettes 141. Le racloir 170 est fixé dans ce dégagement, par exemple par pincement.On the Fig. 7 the scraper 170 constitutes the entire length of the peripheral edges 143. Its height decreases at the tips of the pallets 141. It is manufactured in a plate of an elastomeric material, for example polyurethane, incorporating, preferably , a reinforcement mesh of its structure to avoid tearing with use. It is arranged in a clearance 122 excavating the periphery of the blade between the tips of the pallets 141. The scraper 170 is fixed in this clearance, for example by pinching.

Sur la Fig. 4, le racloir 170 est constitué de deux plaques 171, dont la partie active présente un bord arrondi et dont le rayon O est centré sur l'axe de l'arbre 110. Les deux plaques 171 sont fixées respectivement de part et d'autre des deux palettes 141. Chaque plaque est fixée par l'intermédiaire d'au moins une ferrure 180 retenue sur la palette par des boulons 182, traversant des trous réalisés au travers de la plaque et de ladite ferrure, de sorte à pincer le bord intérieur 172 du racloir 170 sur une palette 141 correspondante.On the Fig. 4 the scraper 170 consists of two plates 171 whose active part has a rounded edge and whose radius O is centered on the axis of the shaft 110. The two plates 171 are respectively fixed on either side of the two pallets 141. Each plate is fixed by means of at least one fitting 180 retained on the pallet by bolts 182, passing through holes made through the plate and said fitting, so as to pinch the inner edge 172 scraper 170 on a corresponding pallet 141.

Au moins une première ferrure 180 pince ainsi d'un côté une plaque 141 sur une palette 141, et au moins une seconde ferrure 180 pince de l'autre côté, l'autre plaque 171 sur l'autre palette 141.At least one first fitting 180 thus clamps on one side a plate 141 on a pallet 141, and at least one second fitting 180 clamps on the other side, the other plate 171 on the other pallet 141.

On notera, en référence à la Fig. 3, que le décalage angulaire entre les pales 120 est tel qu'une seule pale pénètre à la fois dans l'auge délimitée par la paroi de fond 20 de la benne 12 du godet 10. Une puissance moindre est nécessaire pour entraîner en charge l'organe 100 de mélange et/ou de distribution.Note, with reference to the Fig. 3 , that the angular offset between the blades 120 is such that only one blade penetrates both into the trough delimited by the bottom wall 20 of the bucket 12 of the bucket 10. Less power is required to drive the load. mixing member 100 and / or distribution.

Par ailleurs, en réduisant d'un facteur de un à deux le nombre de pales, on évite « l'effet tonneau », c'est-à-dire l'entraînement en un seul bloc de certaines matières réputées difficiles à mélanger, à distribuer, par l'organe de mélange et/ou de distribution.Moreover, by reducing by a factor of one to two the number of blades, the "barrel effect" is avoided, that is to say the training in a single block of certain materials deemed difficult to mix, to distribute, by the mixing and / or dispensing member.

La valeur maximale du couple moteur nécessaire à l'entraînement de l'organe 100 de mélange et/ou de distribution est réduite.The maximum value of the engine torque necessary for driving the mixing and / or dispensing member 100 is reduced.

Equipées en leur périphérie d'un moyen d'escamotage, les pales de l'organe de mélange et/ou de distribution de l'invention, réduisent la puissance nécessaire pour mouvoir en service un tel organe de mélange et/ou de distribution.Equipped at their periphery with a means of retraction, the blades of the mixing and / or dispensing member of the invention reduce the power required to move such a mixing and / or dispensing member into service.

S'agissant d'une pale, sa construction à partir de seulement deux composants, et qui plus est sont identiques, elle est relativement économique à fabriquer.Being a blade, its construction from only two components, and what is more are identical, it is relatively economical to manufacture.

Le nombre de références à gérer pour sa fabrication est notoirement réduit. On passe ainsi de trois références à une pour un même diamètre d'organe de mélange et/ou de distribution.The number of references to be managed for its manufacture is notoriously reduced. We thus go from three references to one for the same diameter of mixing and / or distribution member.

Sa rigidité est importante au regard de la quantité de matière nécessaire à sa fabrication.Its rigidity is important in view of the amount of material needed for its manufacture.

Son efficacité est accrue du fait de la meilleure pénétration dans la matière de sa partie de liaison avec les palettes. Une moindre puissance est nécessaire pour la faire fonctionner, c'est-à-dire pour entraîner à rotation l'arbre qui supporte au moins une telle pale.Its efficiency is increased because of the better penetration into the material of its part of connection with the pallets. Less power is required to operate it, that is to say to rotate the shaft which supports at least one such blade.

Sur les Figs. 11 et 12, le racloir 170 est ici constitué d'une seule plaque 171 dont la partie active présente une géométrie en segment de cercle et dont la périphérie forme une portion d'hélicoïde. La plaque est fixée dans le prolongement des deux palettes 141 par l'intermédiaire d'au moins une ferrure 180 fixée par des boulons 182, traversant des trous réalisés au travers des deux palettes et de la ferrure, de sorte à pincer le bord intérieur du racloir 170 sur les deux palettes 141. Le racloir 170 peut être traversé de trous au travers desquels des plots issus d'au moins une ferrure prennent place pour le retenir.On the Figs. 11 and 12 , the scraper 170 is constituted by a single plate 171 whose active part has a geometry in a circle segment and whose periphery forms a portion of helicoid. The plate is fixed in the extension of the two pallets 141 by means of at least one fitting 180 fixed by bolts 182, passing through holes formed through the two pallets and the fitting, so as to pinch the inner edge of the scraper 170 on the two pallets 141. The scraper 170 can be traversed by holes through which pads from at least one fitting take place to hold it.

Sur la Fig. 12, une paire de ferrures 180a et 180b borde de chaque côté le racloir 170. Chaque ferrure 180a et 180b est pourvue d'un pli rectiligne autour duquel le racloir 170 peut se replier normalement en s'escamotant.On the Fig. 12 , a pair of fittings 180a and 180b edge on each side the scraper 170. Each bracket 180a and 180b is provided with a rectilinear fold around which the scraper 170 can fold normally retracting.

En pouvant pivoter autour d'une génératrice droite, la déformation du racloir 170 est la moins contraignante pour sa structure. On augmente ainsi notablement la durée de vie du racloir.Being able to pivot about a right generator, the deformation of the scraper 170 is the least constraining for its structure. This significantly increases the life of the scraper.

Chaque ferrure 180a, 180b comprend une première paroi 181 plane prenant en sandwich le racloir 170 contre une paroi identique de l'autre ferrure, une seconde paroi 183 de préférence plane, qui prolonge par le haut et de manière oblique vers l'extérieur, la première paroi 181. Cette seconde paroi 183 sert ainsi d'assise au racloir 170 pour limiter son inclinaison en fonctionnement et par conséquent pour limiter sa déformation. L'angle intérieur γ formé par les deux parois 181 et 183 est à cet effet de préférence obtus.Each bracket 180a, 180b comprises a first flat wall 181 sandwiching the scraper 170 against an identical wall of the other fitting, a second wall 183 preferably flat, which extends from the top and obliquely outwards, the first wall 181. This second wall 183 and serves as seat scraper 170 to limit its inclination in operation and therefore to limit its deformation. The inside angle γ formed by the two walls 181 and 183 is preferably obtuse for this purpose.

Les deux parois 181 et 183 sont raccordées par une paroi rayonnée 184. Cette paroi rayonnée permet alors d'accompagner localement le racloir pendant son inclinaison en l'obligeant à s'enrouler à sa base afin de limiter les tensions internes dans cette partie la plus sollicitée mécaniquement. Le nombre de cycles de déformation du racloir est ainsi accru.The two walls 181 and 183 are connected by a radially walled wall 184. This radiated wall then makes it possible to accompany the scraper locally during its inclination by forcing it to wind up at its base in order to limit the internal stresses in this most mechanically solicited. The number of deformation cycles of the scraper is thus increased.

Les deux ferrures 180a, 180b sont disposées symétriquement de part et d'autre du racloir 170, pour procurer un fonctionnement identique de la pale dans les deux sens de rotation de l'organe de mélange et/ou de distribution.The two fittings 180a, 180b are arranged symmetrically on either side of the scraper 170, to provide identical operation of the blade in both directions of rotation of the mixing member and / or distribution.

Sur la Fig. 11, les pointes extérieures des deux ferrures 180 se prolongent jusqu'aux pointes extérieures du racloir 170 pour le protéger de l'usure pendant le travail des pales.On the Fig. 11 , the outer tips of the two fittings 180 extend to the outer ends of the scraper 170 to protect it from wear during blade work.

Sur la Fig. 3, le godet 10 incorpore un organe 100 de mélange et/ou de distribution qui est équipé d'une pluralité de pales 120. Chaque pale 120 est pourvue, notamment, d'un racloir 170 qui est formé de deux demi-parties 170a et 170b. Elles sont de préférence séparées au niveau d'un plan médian sécant à l'axe 110 portant les pales.On the Fig. 3 , the bucket 10 incorporates a mixing member 100 and / or distribution which is equipped with a plurality of blades 120. Each blade 120 is provided, in particular, with a scraper 170 which is formed of two half-parts 170a and 170b . They are preferably separated at a median plane intersecting with the axis 110 carrying the blades.

Lorsque la partie active d'un racloir est construite d'un seul tenant, elle se déforme latéralement pendant qu'elle s'escamote sous la pression de la matière travaillée. Sa zone centrale subit davantage de contraintes qu'au niveau de ses deux extrémités du fait de sa hauteur plus grande. Aussi, en séparant la partie active du racloir en deux demi-parties de longueur réduite de moitié, celles-ci se déforment indépendamment.When the active part of a scraper is built in one piece, it deforms laterally as it retracts under the pressure of the material worked. Its central zone undergoes more stress than at its two ends because of its greater height. Also, by separating the active part of the scraper into two half-parts of length reduced by half, they deform independently.

Il est aussi possible de prévoir, pour chaque demi-racloir, au moins une ferrure 180 pourvue d'un pli rectiligne autour duquel le demi-racloir peut se replier normalement en s'escamotant. La relative faible longueur de la ferrure permet de conserver une hauteur du demi-racloir sensiblement constante sur environ les deux tiers de sa longueur. On peut encore, dans le même but, orienter de manière convexe chaque paire de ferrures 180a et 180b tenant respectivement les deux demi-parties du racloir, comme cela apparaît sur cette Fig. 3.It is also possible to provide, for each half-scraper, at least one fitting 180 provided with a rectilinear fold around which the half-scraper can fold back normally retracting. The relatively short length of the fitting makes it possible to maintain a substantially constant height of the half-scraper about two-thirds of its length. We can still, for the same purpose, orient convexly each pair of fittings 180a and 180b respectively holding the two half-parts of the scraper, as shown on this Fig. 3 .

En pouvant pivoter autour d'une génératrice droite, la déformation du racloir est la moins contraignante pour sa structure. On augmente ainsi notablement la durée de vie du racloir.Being able to pivot around a right generator, the deformation of the scraper is the least constraining for its structure. This significantly increases the life of the scraper.

Sur la Fig. 13, les deux demi-parties du racloir portent également les références 170a et 170b.On the Fig. 13 the two half-parts of the scraper are also referenced 170a and 170b.

Sur la Fig. 14, chaque demi-partie du racloir 170, et dont une seule, 170a, est visible sur cette vue en coupe, est prise en sandwich dans sa partie inférieure entre deux éléments 180a, 180b, constitutifs d'une paire de ferrures 180. La paire de ferrure 180, chaque demi-racloir correspondant, sont fixés contre la palette 141 d'une demi pale 130, par exemple à l'aide de boulons 182 traversant la zone prise en sandwich.On the Fig. 14 each half-portion of the scraper 170, of which only one, 170a, is visible in this sectional view, is sandwiched in its lower part between two elements 180a, 180b constituting a pair of fittings 180. The pair 180, each half-scraper corresponding, are fixed against the pallet 141 of a half-blade 130, for example by means of bolts 182 through the sandwiched zone.

Chaque ferrure 180a, 180b comprend une première paroi 181 plane prenant en sandwich le demi-racloir 170a contre une paroi identique de l'autre ferrure, une seconde paroi 183 de préférence plane, qui prolonge par le haut et de manière oblique vers l'extérieur la première paroi 181. Cette seconde paroi 183 sert ainsi d'assise au demi-racloir 170a pour limiter son inclinaison en fonctionnement et par conséquent pour limiter sa déformation. L'angle intérieur γ formé par les deux parois 181 et 183 est à cet effet de préférence obtus.Each bracket 180a, 180b comprises a first flat wall 181 sandwiching the half-scraper 170a against an identical wall of the other fitting, a second wall 183 preferably flat, which extends from the top and obliquely outwards the first wall 181. This second wall 183 and serves as a seat half-scraper 170a to limit its inclination in operation and therefore to limit its deformation. The inside angle γ formed by the two walls 181 and 183 is preferably obtuse for this purpose.

Les deux parois 181 et 183 sont raccordées par une paroi rayonnée 184. Cette paroi rayonnée permet alors d'accompagner localement le demi-racloir pendant son inclinaison en l'obligeant à s'enrouler à sa base afin de limiter les tensions internes dans cette partie la plus sollicitée mécaniquement. Le nombre de cycles de déformation du racloir est ainsi accru.The two walls 181 and 183 are connected by a radially walled wall 184. This radiated wall then makes it possible to locally accompany the half-scraper during its inclination by forcing it to wind at its base in order to limit the internal tensions in this part. the most mechanically stressed. The number of deformation cycles of the scraper is thus increased.

Les deux ferrures 180a, 180b de chaque paire sont disposées symétriquement de part et d'autre de chaque demi-racloir 170a, 170b, pour procurer un fonctionnement identique de la pale dans les deux sens de rotation de l'organe de mélange et/ou de distribution.The two fittings 180a, 180b of each pair are arranged symmetrically on either side of each half-scraper 170a, 170b, to provide identical operation of the blade in both directions of rotation of the mixing member and / or of distribution.

Sur la Fig. 13, le demi-racloir 170a est fixé d'un côté de la palette 141 d'une demi-pale et l'autre demi-racloir 170b est fixé de l'autre côté de la palette 141 de l'autre demi-pale. Les deux demi-racloirs sont également disposés de manière symétrique par rapport à un plan médian de la pale sécant à son axe de rotation. De cette façon, on obtient, là encore un fonctionnement identique de la pale dans les deux sens de rotation de l'organe de mélange et/ou de distribution.On the Fig. 13 , the half-scraper 170a is fixed on one side of the pallet 141 of a half-blade and the other half-scraper 170b is fixed on the other side of the pallet 141 of the other half-blade. The two half-scrapers are also arranged symmetrically with respect to a median plane of the secant blade at its axis of rotation. In this way, we obtain, again an identical operation of the blade in both directions of rotation of the mixing member and / or distribution.

Sur la Fig. 15, on distingue la présence d'un interstice I qui subsiste entre les deux demi- racloirs 170a et 170b, du fait notamment qu'ils sont positionnés de part et d'autre de la structure porteuse de la pale. Il permet d'évacuer plus facilement la matière travaillée qui est susceptible de se coincer entre les deux demi-parties du racloir 170 et la paroi de fond arrondie du godet.On the Fig. 15 , there is the presence of an interstice I which remains between the two half-scrapers 170a and 170b, in particular because they are positioned on either side of the bearing structure of the blade. It makes it easier to evacuate the worked material that is likely to get caught between the two half-parts of the scraper 170 and the rounded bottom wall of the bucket.

Sur la Fig. 13, les pointes extérieures des deux paires de ferrures 180 se prolongent jusqu'aux pointes extérieures du racloir pour le protéger de l'usure pendant le travail des pales.On the Fig. 13 , the outer tips of the two pairs of fittings 180 extend to the outer ends of the scraper to protect it from wear during blade work.

Sur la Fig. 16, le racloir 170 est constitué de deux plaques distinctes 171a et 171b. Les deux pointes 175 du racloir 170 sont raccordées au bord périphérique 143 arrondi par un rayon plus petit que le rayon O de ce bord périphérique 143, afin d'être éloignées de quelques centimètres de la paroi de fond arrondie 20 du godet. Ainsi, en fonctionnement, l'une des pointes 175 du racloir pénètre progressivement la matière, lorsqu'elle s'inscrit dans l'auge formée par la paroi de fond arrondie 20 de la benne du godet. Le racloir sépare mieux la matière dans l'auge. Une quantité moindre de matière s'insinue entre les racloirs et l'auge. Il en résulte également une usure réduite des pointes du racloir.On the Fig. 16 the scraper 170 consists of two separate plates 171a and 171b. The two tips 175 of the scraper 170 are connected to the peripheral edge 143 rounded by a radius smaller than the radius O of this peripheral edge 143, so as to be a few centimeters away from the rounded bottom wall 20 of the bucket. Thus, in operation, one of the points 175 of the scraper gradually penetrates the material, when it fits into the trough formed by the rounded bottom wall 20 of the bucket of the bucket. The scraper separates the material better in the trough. A smaller amount of material creeps between the scrapers and the trough. This also results in reduced wear of the scraper tips.

Claims (16)

Godet (10) comprenant une benne délimitée par une paroi de fond arrondie (20), le long de laquelle s'étend un organe (100) de mélange et/ou de distribution monté à rotation à l'intérieur de ladite benne, ledit organe comprenant des pales (120) destinées à déplacer la matière, les pales étant pourvues d'un bord périphérique (143) formant un secteur d'hélicoïde, caractérisé en ce que les pales (120) comportent des racloirs (170) escamotables portant ledit bord périphérique et destinés à éviter, pendant la rotation dudit organe (100), le coincement de la matière susceptible d'être contenue dans la benne, entre ledit bord périphérique (143) des racloirs (170) et ladite paroi de fond arrondie.Bucket (10) comprising a bucket delimited by a rounded bottom wall (20), along which extends a member (100) for mixing and / or distribution rotatably mounted within said bucket, said member comprising blades (120) for moving the material, the blades being provided with a peripheral edge (143) forming a helical sector, characterized in that the blades (120) comprise retractable scrapers (170) carrying said edge peripheral and intended to avoid, during the rotation of said member (100), jamming of the material likely to be contained in the bucket, between said peripheral edge (143) of the scrapers (170) and said rounded bottom wall. Godet (10) selon la revendication 1, caractérisé en ce que chaque racloir (170) est constitué d'au moins une plaque (171) fixée sur la périphérie de ladite pale, par l'intermédiaire d'au moins une ferrure (180).Bucket (10) according to claim 1, characterized in that each scraper (170) consists of at least one plate (171) fixed on the periphery of said blade, via at least one fitting (180) . Godet (10) selon la revendication 1 ou 2, caractérisé en ce que chaque racloir (170) d'une pale (120) est constitué de deux demi-parties (170a, 170b) dont les parties actives sont séparées au niveau d'un plan de symétrie de la pale passant par l'axe de l'organe (100) de mélange et/ou de distribution.Bucket (10) according to claim 1 or 2, characterized in that each scraper (170) of a blade (120) consists of two half-parts (170a, 170b) whose active parts are separated at a level of plane of symmetry of the blade passing through the axis of the member (100) of mixing and / or distribution. Godet (10) selon la revendication 2 ou 3, caractérisé en ce que chaque ferrure (180) comprend une paroi (181) pourvue d'un rebord rectiligne autour duquel peut pivoter un racloir (170), un demi-racloir (170a, 170b).Bucket (10) according to claim 2 or 3, characterized in that each bracket (180) comprises a wall (181) provided with a straight edge around which can rotate a scraper (170), a half-scraper (170a, 170b ). Godet (10) selon la revendication 4, caractérisé en ce qu'une seconde paroi (183) prolonge de manière oblique et vers l'extérieur la première paroi (181), de sorte à servir d'assise au racloir (170), au demi-racloir (170a, 170b), pour limiter son inclinaison en fonctionnement.Bucket (10) according to claim 4, characterized in that a second wall (183) extends obliquely and outwardly the first wall (181), so as to serve as seat for the scraper (170), the half-scraper (170a, 170b), to limit its inclination in operation. Godet (10) selon la revendication 5, caractérisé en ce que les deux parois (181 et 183) sont raccordées par une paroi rayonnée (184).Bucket (10) according to claim 5, characterized in that the two walls (181 and 183) are connected by a radiated wall (184). Godet (10) selon l'une quelconque des revendications 3 à 6, caractérisé en ce qu'une paire de ferrures (180a, 180b) est disposée symétriquement de part et d'autre de chaque racloir (170), de chaque demi- racloir (170a, 170b).Bucket (10) according to any one of claims 3 to 6, characterized in that a pair of brackets (180a, 180b) is disposed symmetrically on either side of each scraper (170), each half-scraper (170a, 170b). Godet (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux pointes (175) du racloir (170) sont éloignées de quelques centimètres de la paroi de fond arrondie (20) du godet, de sorte à ce que l'une d'elles, suivant le sens de rotation des pales (120), puisse pénétrer progressivement la matière, lorsqu'elle s'inscrit dans l'auge formée par ladite paroi de fond arrondie (20).Bucket (10) according to any one of the preceding claims, characterized in that the two points (175) of the scraper (170) are spaced a few centimeters from the rounded bottom wall (20) of the bucket, so that one of them, according to the direction of rotation of the blades (120), can penetrate progressively the material, when it fits into the trough formed by said rounded bottom wall (20). Godet (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque racloir (170), chaque demi-racloir (170a, 1701b) est fabriqué dans un matériau moins rigide que celui qui constitue la partie complémentaire de la pale (120) correspondante.Bucket (10) according to any one of the preceding claims, characterized in that each scraper (170), each half-scraper (170a, 1701b) is made of a less rigid material than that which constitutes the complementary part of the blade ( 120). Godet (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque pale (120) comprend deux demi-pales (130a, 130b) tournées en vis-à-vis et assemblées mutuellement, chaque demi-pale (130) comprenant un premier pan (140) formant une portion d'une partie active (141) de la pale, un second pan (160) formant une paroi de liaison avec l'autre demi-pale (130), le racloir (170), les deux demi-racloirs, étant solidaire(s) des deux demi-pales.Bucket (10) according to any one of the preceding claims, characterized in that each blade (120) comprises two half-blades (130a, 130b) facing each other and joined together, each half-blade (130). comprising a first panel (140) forming a portion of an active part (141) of the blade, a second panel (160) forming a connecting wall with the other half-blade (130), the scraper (170), the two half-scrapers, being secured (s) of the two half-blades. Godet (10) selon la revendication 10, caractérisé en ce qu'un demi-racloir (170a) est fixé d'un côté de la partie active (141) d'une demi-pale (130a) et l'autre demi-racloir (170b) est fixé de l'autre côté de la partie active (141) de l'autre demi-pale (130b).Bucket (10) according to claim 10, characterized in that a half-scraper (170a) is fixed on one side of the active part (141) of a half-blade (130a) and the other half-scraper (170b) is attached to the other side of the active portion (141) of the other half-blade (130b). Godet (10) selon la revendication 10 ou 11, caractérisé en ce que la géométrie de chaque pan (140, 160) est plane.Bucket (10) according to claim 10 or 11, characterized in that the geometry of each pan (140, 160) is flat. Godet (10) selon l'une quelconque des revendications 10, 11 ou 12, caractérisé en ce que chaque demi-pale (130) est constituée d'une plaque de tôle pliée.Bucket (10) according to any one of claims 10, 11 or 12, characterized in that each half-blade (130) consists of a folded sheet metal plate. Godet (10) selon l'une quelconque des revendications 10 à 13, caractérisé en ce que le bord latéral libre (162) du second pan (160) d'une demi-pale (130) est soudé sur le premier pan (140) de l'autre demi-pale (130) et réciproquement.Bucket (10) according to any one of claims 10 to 13, characterized in that the free lateral edge (162) of the second pan (160) of a half-blade (130) is welded to the first pan (140) the other half-blade (130) and vice versa. Godet (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le décalage angulaire entre les pales (120) est tel qu'une seule pale pénètre à la fois dans l'auge délimitée par la paroi de fond (20) de ladite benne (12).Bucket (10) according to any one of the preceding claims, characterized in that the angular offset between the blades (120) is such that only one blade penetrates both into the trough delimited by the bottom wall (20). said bucket (12). Godet (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la paroi de fond arrondie (20) de la benne est sécante avec une paroi frontale (22) et/ou une paroi dorsale (24), la benne étant délimitée également par deux parois latérales (26), au moins l'une de ces parois latérales (26) étant traversée d'une ouverture, une trappe de fermeture (28) pouvant refermer ou dégager ladite ouverture sous l'effet du fonctionnement d'un organe de manoeuvre (30).Bucket (10) according to any one of the preceding claims, characterized in that the rounded bottom wall (20) of the bucket is secant with a front wall (22) and / or a back wall (24), the bucket being also delimited by two side walls (26), at least one of these side walls (26) being traversed by an opening, a closure door (28) which can close or release said opening under the effect of the operation of an operating member (30).
EP12190211.8A 2011-10-27 2012-10-26 Bucket including blades provided with retractable scrapers Not-in-force EP2586522B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12190211T PL2586522T3 (en) 2011-10-27 2012-10-26 Bucket including blades provided with retractable scrapers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1159752A FR2981864B1 (en) 2011-10-27 2011-10-27 MEANS OF DRIVING MATERIAL INTENDED TO BE SOLIDARIZED ON A SHAFT OF A MIXING AND / OR DISTRIBUTION BODY

Publications (2)

Publication Number Publication Date
EP2586522A1 true EP2586522A1 (en) 2013-05-01
EP2586522B1 EP2586522B1 (en) 2014-07-02

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EP12190211.8A Not-in-force EP2586522B1 (en) 2011-10-27 2012-10-26 Bucket including blades provided with retractable scrapers

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EP (1) EP2586522B1 (en)
ES (1) ES2509818T3 (en)
FR (1) FR2981864B1 (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3225300A1 (en) * 2016-03-09 2017-10-04 Detlef Bauer Mixing tool, mixing device and mixing tool manufacturing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR797712A (en) * 1934-11-15 1936-05-02 Rotations Und Druckfarben G M Stirrer
FR1053000A (en) 1952-03-25 1954-01-29 Radio Ind Improvements to neutrodyne amplifiers
DE3102834A1 (en) * 1981-01-29 1982-09-02 Elba Werk Maschinen Gmbh & Co Mixing tool
GB2315975A (en) * 1996-08-09 1998-02-18 H & K Dev Limited A mixing and dispensing apparatus
EP1122047A1 (en) * 2000-01-31 2001-08-08 Rabaud Improvements on a bucket mixer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE475026A (en) *
JPS62149328A (en) * 1985-12-23 1987-07-03 Taiheiyo Kiko Kk Mixer
GB2470914B (en) * 2009-06-09 2014-04-09 Kenwood Ltd Beater assembly for a stand mixer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR797712A (en) * 1934-11-15 1936-05-02 Rotations Und Druckfarben G M Stirrer
FR1053000A (en) 1952-03-25 1954-01-29 Radio Ind Improvements to neutrodyne amplifiers
DE3102834A1 (en) * 1981-01-29 1982-09-02 Elba Werk Maschinen Gmbh & Co Mixing tool
GB2315975A (en) * 1996-08-09 1998-02-18 H & K Dev Limited A mixing and dispensing apparatus
EP1122047A1 (en) * 2000-01-31 2001-08-08 Rabaud Improvements on a bucket mixer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3225300A1 (en) * 2016-03-09 2017-10-04 Detlef Bauer Mixing tool, mixing device and mixing tool manufacturing method

Also Published As

Publication number Publication date
FR2981864B1 (en) 2020-09-25
ES2509818T3 (en) 2014-10-20
PL2586522T3 (en) 2014-11-28
FR2981864A1 (en) 2013-05-03
EP2586522B1 (en) 2014-07-02

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