ES2509818T3 - Bucket comprising shovels equipped with retractable rakes - Google Patents

Abstract

Bucket (10) comprising a hopper delimited by a rounded bottom wall (20) along which extends a mixing and / or distribution element (100) mounted in rotation inside said hopper, said element comprising vanes (120) intended to move the material, the vanes being provided with a peripheral edge (143) forming a helical sector, the vanes (120) comprising rakes (170) retractable on said peripheral edge and intended to avoid, during rotation of the element (100), the retention of the material capable of being contained in the hopper between said peripheral edge (143) of the rakes (170) and said rounded bottom wall, each rake (170) being manufactured in a plate of elastomeric material , characterized in that each rake (170) is constituted by at least one plate (171) fixed on the periphery of said pallet by means of at least one hardware (180) and because each hardware (180) comprises a wall (18 1) provided with a rectilinear edge around which the projecting part of said rake (170) can rotate.

Description

DESCRIPTION

Bucket comprising shovels equipped with retractable rakes

The present invention relates to a bucket whose hopper incorporates a mixing and / or distribution element of a material.

The hopper of such a bucket is intended to contain the material to be mixed and distributed, as well as a rotating element 5 located along its rounded bottom wall, which forms a bucket, to mix the material and / or distribute it through a opening made in a side wall of the bucket and usually closed by a movable cover between an opening position and a closing position.

Such an element is described in French patent application No. 10 53000. According to Figs. 1 and 2, it is composed of an axis A capable of being mounted in rotation between the two side walls of a bucket, parallel to its wall 10 of bottom, and around which a plurality of means of displacement of the material are arranged and presented here in the form of pallets P. Each pallet P is constituted by a pair of continuous wings L1, L2 in both parts of a central core C integral With the shaft. In a frontal view, said central core has a flat plate structure with triangular geometry and whose width decreases in the direction of the periphery of the vane P, to receive from each side of its end-pointed part the pair of wings L1 and L2. The central core C is fixed in the shaft A 15 by welding. Viewed from the front, each wing L has a triangular geometry, whose peripheral edge is delimited by a radius O centered on the axis of the tree A. A recess recesses the free side edge to facilitate the reflux of the material between the blades, while its other lateral edge is fixed in the central core C by welding. A radial plate G crosses the central core in its middle part and is attached to it by welding to increase the lateral stiffness of the blade, necessary during its operation, due to its incidence. twenty

The axis of the tree A is centered on the axis of the rounded bottom wall of the bucket. When in operation, the peripheral edge of the vane moves a short distance from said bottom wall to limit wear of the vane or the bottom wall. The applicant has found that certain materials or mixtures of materials, and in particular those containing fibers, were retained between the pallet and this bottom wall of the bucket. The power necessary for the displacement of the mixing and / or distribution element 25 then increases in proportions ranging from single to double, even more. It is also possible that the displacement motor (s) of the mixing and / or distribution element is blocked (n).

An apparatus for mixing animal feed is also known from the reading of the GB-A-2 315 975 patent. It comes in the form of a traction trailer open at the top and bounded by a plurality of walls. A displacement tree, provided with mixing and distribution vanes, is located on its 30-round rounded wall. Some pallets are provided with a sweeping element comprising a tape of flexible rubber material intended to rub the rounded wall.

Thus, the applicant has sought a solution to avoid blocking the material between the vanes of the mixing and / or distribution element and the rounded bottom wall of the bucket hopper, thus trying to reduce the power needed to move in rotation and in service said mixing and / or distribution element. 35

For this purpose, a bucket is proposed comprising a hopper delimited by a rounded bottom wall, along which a mixing and / or distribution element mounted in rotation inside said hopper extends, said element comprising vanes intended to move the material, the vanes being provided with a peripheral edge in the form of a helical sector; according to the invention, the vanes comprise retractable rakes on said peripheral edge and intended to prevent, during the rotation of said element, the imprisonment of the material that may be contained in the hopper between such peripheral edge of the rakes and the rounded bottom wall .

The rakes can thus be separated to avoid blocking the material between the rounded bottom wall of the bucket and the vanes. The pressure exerted by the rakes on the rounded bottom wall is small. The power required for the displacement of the mixing and / or distribution element is significantly reduced. Four. Five

According to a further feature of the invention, each rake is constituted by at least one fixed plate on the periphery of said pallet by means of at least one hardware.

In this case, the plates can be replaced.

According to a further feature of the invention, each rake of a vane is constituted by two semi-parts whose active zones are separated at the level of a plane of symmetry of the vane that passes through the axis of the mixing and / or distribution element 50 .

Each shorter half-rake deforms independently. There is also a gap between the two semi-rakes, which allows to evacuate more easily the worked material that could be trapped between the two half-parts of the rake and the rounded bottom wall of the bucket.

According to a further feature of the invention, each hardware comprises a wall provided with a rectilinear edge around which a rake, a semi-rake, can rotate. 5

Being able to rotate around a generatrix, the deformation by folding of the rake, of the semi-rake, along a straight line is less damaging to its structure. Thus, the useful life of the rake is significantly increased.

According to a further feature of the invention, a second wall extends the first wall obliquely and outwardly, so that it serves as the basis for the rake, for the semi-rake, in order to limit its inclination during operation. 10

By limiting its inclination during concealment, the deformation of each rake, of each semi-rake, and, therefore, increases the amount of operating cycles that they can withstand.

According to an additional feature of the invention, the two walls are joined by a radial wall.

Said radial wall thus allows the rake, the semi-rake to be accompanied locally, during its inclination, forcing it to roll up at its base to reduce internal tensions in said part, of high mechanical requirement. This increases the number of rake deformation cycles, semi-rake.

According to a further feature of the invention, a pair of hardware is arranged symmetrically on both sides of each rake, of each semi-rake. The two fittings act identically on the two sides of the folding of each rake, of each semi-rake, regardless of the direction of rotation of the blades.

According to an additional feature of the invention, the two rake points are a few centimeters away from the rounded bottom wall of the bucket, so that one of them, according to the direction of rotation of the vanes, can progressively penetrate the material when It is located in the cuvette formed by said rounded bottom wall.

The rake better separates the material in the bucket. A smaller amount of material can be observed between the rakes and the bucket. There is also less wear on the tip. 25

According to a further feature of the invention, each rake, each semi-rake, is made of a less rigid material than that which constitutes the complementary part of the corresponding palette.

The material, for example an elastomer, deforms and passes the material that is processed in the hopper, between its rounded bottom wall and the periphery of the rake.

According to a further feature of the invention, each vane comprises two semi-blades turned face to face and 30 mutually assembled, each half-blade comprising a first face that forms an active area of the pallet, a second face that forms a joining wall with the other semi-shovel, the rake, slab two semi-rakes, solidary (s) with the two semi-shovels.

Built with two components, the manufacturing of the pallet of the invention is relatively economical.

The pallet has a greater rigidity due to the double thickness of the junction zone of the two semi-blades. Palette 35 does not need a card to reinforce its union with the tree.

According to a further feature of the invention, a semi-rake is fixed to one side of the active zone of a semi-blade and the other semi-rake fixed to the other side of the active zone of the other semi-blade.

Once again, identical operation of the vane is obtained in both directions of rotation of the mixing and / or distribution element. 40

According to an additional feature of the invention, the geometry of each face is flat.

It can be manufactured with a simple material plate.

According to a further feature of the invention, each semi-blade is constituted by a folded sheet plate.

Its manufacturing is relatively economical.

According to a further feature of the invention, the free side edge of the second face of a half blade is welded to the first face of the other half blade and vice versa.

The manufacturing of a pallet is carried out by a mutual welding operation of the two semi-blades placed opposite each other.

According to an additional feature of the invention, the angular offset between the vanes is such that only a single vane penetrates at the same time in the tray delimited by the bottom wall of the hopper.

The maximum coupling required to move the mixing and / or distribution element in rotation and in service is reduced.

According to a further feature of the invention, the rounded bottom wall of the hopper is secant with a front wall and / or a dorsal wall, the hopper being also delimited by two side walls, at least one of said side walls being crossed by an opening, where a closing lid can close or open said opening by operating a maneuvering element.

By making two openings respectively through the two side walls and by equipping the bucket with two closing covers, the bucket can dump its contents from the left side, from the right side or simultaneously from both sides, indifferently. fifteen

The features of the invention mentioned above as well as others will emerge more clearly from reading the following description of an exemplary embodiment, and in relation to the attached figures, in which:

Fig. 1: front view of a mixing and / or distribution element according to the prior art capable of being mounted on a bucket;

Fig. 2: side view of a mixing and / or distribution element according to the prior art capable of being mounted on a bucket,

Fig. 3: perspective view of a bucket that includes a mixing and / or distribution element according to the invention,

Fig. 4: an expanded perspective view of a vane according to the invention,

Fig. 5: top view of a semi-blade according to the invention, 25

Fig. 6: top view of a vane assembled and in welding position in a shaft of a mixing and / or distribution element according to the invention,

Fig. 7: side view of a variant embodiment of a vane according to the invention,

Fig. 8: perspective view of a vane according to the invention,

Fig. 9: cross-sectional view of the hopper of a bucket oriented in its mixing position, 30 including two material retention taps as well as a mixing and / or distribution element according to the invention,

Fig. 10: top view of the hopper of a bucket that includes two material retention plugs as well as a mixing and / or distribution element according to the invention,

Fig. 11: front view of a second variant embodiment of a paddle for a bucket according to the invention,

Fig. 12: side view of a second variant embodiment of a paddle for a bucket according to the invention,

Fig. 13: front view of a third variant embodiment of a paddle for a bucket according to the invention, 40

Fig. 14: sectional view of a third variant embodiment of a paddle for a bucket according to the invention,

Fig. 15: top view of a third variant embodiment of a paddle for a bucket according to the invention and,

Fig. 16: front view of two plates constituting a variant embodiment of a rake according to the invention.

In Fig. 3 a bucket 10 is shown which incorporates a mixing and / or distribution element 100 of a material or a mixture of materials. Bucket 10 can mix material, distribute it or carry out both operations consecutively.

This comprises a loading / unloading hopper 12 delimited by a rounded bottom wall 20, a front wall 50, a back wall 24, two side walls 26a and 26b. At least one of the side walls is crossed by an opening. A closing lid 28 can close or open said opening with a maneuvering element 30, such as a hydraulic jack.

The element 100 is composed of a shaft 110 around which a plurality of vanes 120 are fixed radially fixed to remove the material by moving it laterally to mix it, distribute it. Element 55

100 is mounted horizontally between the two side walls 26 of the bucket 10 and parallel to its rounded bottom wall 20. It can be rotated by at least one motor, a geared motor, so that it can mix the material contained in the bucket and distribute it, in this case, through the open opening.

Each vane 120 is constituted, in Fig. 4, by two half-blades 130a and 130b, rotated facing each other and assembling each other when they come into contact with each other. Advantageously they are identical. 5

Each semi-blade 130 is constituted, in Fig. 5, by a plate comprising a first face 140, a second face 160. The two faces 140 and 160 are formed by flat walls. The two faces are not parallel. They form an obtuse angle to each other. The angle α formed between the two faces 140 and 160 is between 110 ° and 150 °.

Advantageously, each half-blade 130 is made in one piece. The plate is made of a rigid material, such as steel. For its realization, the half-blade 130 is cut into a sheet and folded so that its two faces 140 and 160 are formed around a fold 131, constituted here by a rounded area.

According to a manufacturing mode, not shown, the two constituent faces 140 and 160 of each half-blade 130 are different parts and are assembled by welding at the level of two joint edges.

In a third mode of manufacture, not shown, the two faces are coplanar pieces together or are formed by a single and same coplanar piece, that is to say without fold. fifteen

In Figs. 4 and 8, the first face 140 of a half blade is intended to form half of the active part of the blade 120, while its second face 160 is intended to be integral with the second half blade, forming a particularly rigid and effective pallet structure. The second side of the second half-blade is also integral with the first half-blade.

Thus, the first face 140 comprises a vane 141 for displacing the material which is extended by a wall 142 with a reduced width intended to join it with the tree. The vanes 141 then constitute the active part of the vane, while the walls 142 constitute the connecting part of the blade to the shaft 110.

Said connecting wall 142, with a smaller width, facilitates the reflux of the material between the blades during the mixing stage, the mixing stages of the material. An advantageous mixing method is described in patent application No. 10 53000. 25

The vane 141 is delimited by a rounded peripheral edge 143 and whose radius O is centered on the shaft of the shaft 110 when viewed from its end, a side edge located on the other side of the fold 131 that delimits the two free faces 140, 160 and recessed by a recess 144 that delimits in this way said connecting wall. The peripheral edge 143 in practice forms a helical sector by the non-zero passage of the vane described below. 30

In operation, the rounded peripheral edge 143 rotates in the bucket at a very short distance from its bottom wall, so that the vanes can act on the material to mix it, but especially to unload it. The lack of contact reduces the wear of the peripheral edges of the back wall.

The second face 160 is constituted by a triangular wall and whose most acute vertex is located at the intersection of the fold 131 and the rounded peripheral edge 143. Its free lateral edge 162 also reaches said vertex.

A rounded wall 150 of radius r, equal to that of the shaft 110, is made in each half-blade 130, in the opposite part to the peripheral edge 143. The radius of said rounded wall is as a whole centered on the extension of the fold 131.

In Fig. 3, at least one end of the shaft 110 is extended by means of a sleeve 112, in which a container can be placed without touching it, to accommodate said displacement motor, to be fixed on a corresponding side wall. At least one pallet 120, shorter, is fixed around said sleeve, so that it can work on the entire internal width of the hopper. Said end of the shaft 110 is integral with a flange 114 that is fixed, preferably by bolts, to said sleeve 112, so that the placement of the mixing and / or distribution element 100 is facilitated or allows its disassembly, for example, in the framework of a maintenance operation.

The manufacture of the blade 120 and its attachment to the shaft 110 of the mixing and / or distribution element are presented as follows and in reference to Figs. 4, 5 and 7:

Semi-blades 130 are trimmed on a flat sheet plate. Each half-blade is folded on two faces 140 and 160 around the fold 131, forming an obtuse angle to each other. The two 50 are then joined together

semi-blades 130a and 130b facing each other, so that the free lateral edge 162 of each half-blade is against the first face 140 of the other half-blade and reciprocally. The sharpest vertices of the triangular faces 160 are placed together, at the level of the two peripheral means-edges 143, so that they constitute a continuity between these two peripheral means-edges 143. To this end, a gauge and a tube can be used of the same diameter as the tree. In assembly position, the two semi-blades 130a and 130b are oriented, preferably, perpendicular to the gauge tube, supported by their rounded walls 150.

The two half-blades are then assembled, and preferably by welding, to define the vane 120. To this end, the lateral edges 162 are welded on the first faces 140. In this way, a vane 120 prepared to be integral is obtained. with a tree 110.

In Fig. 6, the passage of the vane 120 is defined by the angle β formed between the peripheral edge 143 and a direction normal to the shaft of the shaft 110 when positioned through its rounded walls 150 in the cylindrical wall of the tree 110. The pitch of vane 120 is non-zero. Advantageously, it is between 10º and 70º.

In other words, the axis of the rounded walls 150 is offset with respect to the peripheral edge 143 an angle β greater than 90 °. In an interesting embodiment in terms of agitation and distribution efficiency, the value of said angle defining the pitch of the blade is between 110 ° and 170 °. fifteen

It is noted in Figs. 6 and 7 that the area of attachment of the vane 120 to the shaft 110 has a diamond geometry, which is reduced by the triangular geometry of the second faces from its base D to the proximity of its peripheral edge 143 Thus, in operation, the angled shape located on both parts of the vane and which is rotated in the direction of advance and / or reflux of the material in the hopper facilitates the penetration of the vane into said material. The performance of the mixing and / or distribution element increases with respect to that described in the introduction of the present application.

Built with identical semi-blades, the blade has a symmetrical structure, so that the operation of the mixing and / or distribution element remains identical in one or the other of its two directions of rotation.

On the other hand, the four faces of the palette form a pyramidal structure box, giving it a relatively high rigidity. In fact, the quadratic moment of such a hollow envelope is superior to that of a shovel of the type that comprises a flat central core on which two wings are fixed, and this for the same wall thickness. The use of a reinforcement plate is no longer required due to the widening of the base of the blade 120 at the level of its area of connection with the shaft 110.

In the third mode of manufacturing the semi-blades, whose faces are coplanar, the two half-blades are assembled at the level of an overlapping zone and which is relatively important at the level of the area of union of the blade with the tree . Said overlap increases, although to a lesser extent than that of the pallet with box, the quadratic moment of the palette.

The different vanes 120 are arranged successively on the shaft 110 so that they rest on it with their rounded walls 150, positioning them, for example, with a gauge. These rounded walls 150 are then welded to the shaft 110. The welding bead is represented by the symbol S. The width of the base D of the vane 120 is slightly equal to or greater than the diameter of the shaft 110. The thickness of the base of The palette is basically equal to half its width. The relative large contact surface between the blade and the shaft gives a particularly rigid connection between these two components, conducive to obtaining a satisfactory level of reliability over time of the mixing and / or distribution element.

In Fig. 7, the vane 120 shown has an arrangement also intended to reduce the power necessary to move a mixing and / or distribution element equipped with a plurality of said vanes in rotation and in load.

This improvement can be used with the vane of the invention described above or with all the vanes mounted on a tree and which are constitutive of a mixing and / or distribution element.

Indeed, the applicant has found that when a vane displaced in rotation penetrates the bucket formed by the rounded bottom wall of the hopper of a bucket, certain materials or mixtures of materials, particularly when they contain fibers, fit between the palette and said bottom wall. The power required for displacement then increases in proportions ranging from simple to double, even more. It may also happen that the displacement motor (s) of the mixing and / or distribution element is stopped.

Recall that, in the invention, the peripheral edge of each vane does not touch the bottom wall that forms the bucket 50 when it circulates in said part of the bucket in order to limit the wear of the vane or said bottom wall.

To alleviate this inconvenience, the vane 120 includes on its periphery a rake 170 with a particular structure and which is delimited at least locally by a peripheral edge 143. It is made of a less rigid material than that which constitutes the other part of the vane. It is delimited on its periphery by a radius O centered on the tree 110 that supports the vane 120 when said tree is viewed from its end. Due to the passage of the vane, the peripheral edge 143 has a partially helical geometry. 5

Therefore, said rake 170 can be deformed at the level of its periphery by the oblique position of the pallet due to its passage, during its trajectory, against the rounded bottom, avoiding retaining the material between the pallet and said bottom wall. The material that cannot be displaced deforms the rake 170 and exits below the pallet behind its path. The rake thus forms a retractable medium that separates laterally deforming by the pressure exerted by the material. 10

In Fig. 3, the deformation of the rake 170 is indicated by the arrow T during the loaded rotation of the mixing and / or distribution element 100, this indicated by the arrow R.

In Fig. 7, the rake 170 constitutes the entire length of the peripheral edges 143. Its height decreases to the level of the tips of the vanes 141. It is made of a plate of elastomeric material, for example of polyurethane, which preferably incorporates a reinforcement framework in its structure to prevent its breakage with use. It is arranged in a space 122 that recesses the periphery of the blade between the tips of the vanes 141. The rake 170 is fixed in that space by pinching, for example.

In Fig. 4, the rake 170 is constituted by two plates 171 whose active part has a rounded edge, whose radius O is centered on the shaft of the shaft 110. The two plates 171 are fixed respectively on both parts of the two vanes 141 Each plate is fixed by at least one hardware 180 attached to the vane by bolts 182, 20 through holes made between the plate and said hardware so that they hold the inner edge 172 of the rake 170 in a corresponding vane 141.

At least one first hardware 180 thus holds on one side a plate 141 on a vane 141 and at least a second hardware 180 holds on the other side the other plate 171 on the other vane 141.

It is noted, in reference to Fig. 3, that the angular offset between the vanes 120 is such that a single vane penetrates 25 at the same time into the cuvette bounded by the bottom wall 20 of the hopper 12 of the bucket 10. It is necessary less power to move the mixing and / or distribution element 100 in load.

On the other hand, by reducing the amount of pallets by one factor by two, the "barrel effect" is avoided, that is, the movement in a single block of some materials considered difficult to mix, distribute, by the element of mix and / or distribution. 30

The maximum value of the motor coupling necessary for the displacement of the mixing and / or distribution element 100 is reduced.

Equipped on its periphery with a retractable medium, the vanes of the mixing and / or distribution element of the invention reduce the power necessary to move such mixing and / or distribution element into operation.

Being a pallet, its construction from only two components that are also identical, its manufacture is relatively economical.

The number of references that must be used for its manufacture is markedly reduced. Thus, three references are passed to one for the same diameter of the mixing and / or distribution element.

Its rigidity is important in relation to the amount of material necessary for its manufacture.

Its effectiveness is enhanced by the better penetration into the material of its joining part with the vanes. A lower power is necessary to make it work, that is, to move in rotation the tree that supports at least said vane.

In Figs. 11 and 12, the rake 170 is constituted here by a single plate 171 whose active part has a circular segment geometry and whose periphery forms a helical zone. The plate is fixed in the extension of the two vanes 141 by means of at least one fixed hardware 180 with bolts 182, which pass through holes 45 made through the two vanes and the hardware, so that they hold the inner edge of the rake 170 in the two vanes 141. The rake 170 may be pierced by holes through which pegs from at least one hardware are attached for fastening.

In Fig. 12, a pair of hardware 180a and 180b border the rake 170 on each side. Each hardware 180a and 180b has a rectilinear fold around which the rake 170 can be folded normally and concealed. 50

Being able to rotate around a straight generatrix, the deformation of rake 170 is less problematic for its structure. This significantly increases the life of the rake.

Each hardware 180a, 180b comprises a first flat wall 181 that supports the rake 170 in a sandwich against an identical wall of the other hardware, a second wall 183 preferably flat, which extends the first wall 181 above and obliquely outward. second wall 183 thus serves as the basis for rake 170 to reduce its inclination in operation and, therefore, to reduce its deformation. The inner angle γ formed by the two walls 181 and 183 is preferably obtuse.

The two walls 181 and 183 are joined by a radial wall 184. Said radial wall thus allows the rake to be accompanied locally during its inclination, forcing it to be rolled up to its base to limit the internal tensions in said part, of greater mechanical requirement. The number of rake deformation cycles is thus increased. 10

The two fittings 180a, 180b are arranged symmetrically on each side of the rake 170, allowing identical operation of the blade in the two directions of rotation of the mixing and / or distribution element.

In Fig. 11, the outer tips of the two hardware 180 extend to the outer tips of the rake 170 to protect it from wear during the use of the blades.

In Fig. 3, bucket 10 incorporates a mixing and / or distribution element 100 equipped with a plurality of 15 vanes 120. Each vane 120 is provided, mainly, with a rake 170 formed by two semi-parts 170a and 170b. Preferably, these are separated at the level of a median secant plane with respect to axis 110 which includes the vanes.

When the active part of a rake is built in one piece, it deforms laterally while being hidden under the pressure of the material used. Its central zone suffers greater difficulties than the level of its two 20 extremes due to the fact that its height is greater. Thus, by separating the active part of the rake into two semi-parts with a length reduced by half, they deform independently.

It is also possible to provide, for each semi-rake, at least one hardware 180 provided with a rectilinear fold around which the semi-rake can normally be folded when concealed. The low relative length of the hardware allows to keep a height of the semi-rake essentially constant in approximately two thirds of its length. It can also be oriented, with the same objective, convexly each pair of hardware 180a and 180b that respectively holds the two half-parts of the rake, as shown in said Fig. 3.

Being able to revolve around a straight generatrix, the deformation of the rake is the least damaging to its structure. This significantly increases the lifespan of the rake.

In Fig. 13, the two half-parts of the rake also carry references 170a and 170b. 30

In Fig. 14, each half-part of the rake 170, only one 170a is visible in said sectional view, is sandwiched at its bottom between two elements 180a, 180b, constituting a pair of hardware 180. The pair of fittings 180, each corresponding half-rake, is fixed against the vane 141 of a half-blade 130, for example by bolts 182 that cross the clamped sandwich area.

Each hardware 180a, 180b comprises a first flat wall 181 that grips the semi-rake 170a 35 in a sandwich against an identical wall of the other hardware, a second wall 183, preferably flat, which extends the first and obliquely outward the first wall 181. This second wall 183 thus serves as the basis for the semi-rake 170a to limit its inclination in operation and, therefore, to limit its deformation. For this purpose, the interior angle γ formed by the two walls 181 and 183 is preferably obtuse.

The two walls 181 and 183 are joined by a radial wall 184. Said radial wall allows the semi-rake to be accompanied locally during its inclination, forcing it to be wound at its base to limit the internal tensions in said part, of greater mechanical requirement. Therefore, the number of rake deformation cycles increases.

The two hardware 180a, 180b of each pair are placed symmetrically on both sides of each semi-rake 170a, 170b to achieve identical operation of the blade in the two directions of rotation of the mixing and / or distribution element. Four. Five

In Fig. 13, the semi-rake 170a is fixed on one side of the vane 141 of a semi-blade and the other semi-rake 170b fixed on the other side of the vane 141 of the other semi-blade. The two semi-rakes are also placed symmetrically with respect to a median plane of the blade, secant with respect to their axis of rotation. In this way an identical operation of the blade in the two directions of rotation of the mixing and / or distribution element is also obtained here. fifty

In Fig. 15 the presence of an existing gap between the two half-rakes 170a and 170b is distinguished by being positioned in both parts of the pallet bearing structure. Thus, it is possible to evacuate more easily the material used that can be locked between the two semi-parts of the rake 170 and the rounded bottom wall of the bucket.

In Fig. 13, the outer tips of the two pairs of hardware 180 extend to the outer tips of the rake to protect it from wear during the use of the blades.

In Fig. 6, the rake 170 is constituted by two distinct plates 171a and 171b. The two tips 175 of the rake 170 are connected to the peripheral edge 143 rounded with a radius smaller than the radius O of said peripheral edge 143, to remain a few centimeters away from the rounded bottom wall 20 of the bucket. Thus, when operating, one of the tips 175 of the rake progressively penetrates the material when it is 10 in the bucket formed by the rounded bottom wall 20 of the bucket hopper. The rake better separates the material in the bucket. A smaller amount of material is observed between the rakes and the bucket. Likewise there is less wear on the tips of the rake.

Claims (13)

1. Bucket (10) comprising a hopper delimited by a rounded bottom wall (20) along which extends a mixing and / or distribution element (100) mounted in rotation inside said hopper, comprising said element vanes (120) intended to move the material, the vanes being provided with a peripheral edge (143) forming a helical sector, the vanes (120) comprising rakes (170) retractable on said peripheral edge and intended to avoid, during the rotation of the element (100), the retention of the material capable of being contained in the hopper between said peripheral edge (143) of the rakes (170) and said rounded bottom wall, each rake (170) being manufactured in a plate of elastomeric material, characterized in that each rake (170) is constituted by at least one plate (171) fixed on the periphery of said pallet by means of at least one hardware (180) and because every 10 hardware (180) comprises a p ared (181) provided with a rectilinear edge around which the projecting part of said rake (170) can rotate. 2. Bucket (10) according to claim 1, characterized in that each rake (170) of a vane (120) is constituted by two semi-parts (170a, 170b) whose active parts are separated at the level of a plane of symmetry of the paddle passing through the axis of the mixing and / or distribution element (100). fifteen 3. Bucket (10) according to claim 2, characterized in that a second wall (183) extends obliquely and outwardly the first wall (181) so that it serves as the basis for the rake (170), the semi-rake ( 170a, 170b), to reduce its inclination during operation. 4. Bucket (10) according to claim 3, characterized in that the two walls (181 and 183) are joined by a radial wall (184). twenty 5. Bucket (10) according to any of the preceding claims, characterized in that a pair of hardware (180a, 180b) is arranged symmetrically on both sides of each rake (170), of each semi-rake (170a, 170b). 6. Bucket (10) according to any of the preceding claims, characterized in that the two tips (175) of the rake (170) are a few centimeters away from the rounded bottom wall (20) of the bucket, so that one of them, according to the direction of rotation of the vanes (120), it can progressively penetrate the material when it is in the tray formed by said rounded bottom wall (20). 7. Bucket (10) according to any of the preceding claims, characterized in that each vane (120) comprises two half-blades (130a, 130b) rotated facing each other and assembled mutually, 30 each half-blade (130) comprising a first face (140) forming an area of an active part (141) of the pallet, with a second face (160) forming a junction wall with the other half-blade (130), the rake (170) being the two semi-rakes, solidarity (s) with the two semi-shovels. 8. Bucket (10) according to claim 7, characterized in that a semi-rake (170a) is fixed on one side of the active part (141) of a semi-blade (130a) and the other semi-rake (170b) fixed on the other side of the active part (141) of the other half-blade (130b). 9. Bucket (10) according to claim 7 or 8, characterized in that the geometry of each face (140, 160) is flat. 10. Bucket (10) according to any of claims 7, 8 or 9, characterized in that each semi-blade (130) is constituted by a folded sheet plate. 40 11. Bucket (10) according to any of claims 7 to 10, characterized in that the free side edge (162) of the second face (160) of a half-blade (130) is welded on the first face (140) of the another semi-shovel (130) and reciprocally. 12. Bucket (10) according to any of the preceding claims, characterized in that the angular offset between the vanes (120) is such that a single vane penetrates at the same time in the bucket delimited by the bottom wall (20) of said hopper (12). 13. Bucket (10) according to any of the preceding claims, characterized in that the rounded bottom wall (20) of the hopper is secant with a front wall (22) and / or a dorsal wall (24), the hopper also delimited by two side walls (26), at least one of said side walls (26) being crossed by an opening, with a closing lid (28) which can close or open said opening by operating a maneuvering element (30) .