EP4000837B1 - Machine for construction site with offset vibration source - Google Patents
Machine for construction site with offset vibration source Download PDFInfo
- Publication number
- EP4000837B1 EP4000837B1 EP21208607.8A EP21208607A EP4000837B1 EP 4000837 B1 EP4000837 B1 EP 4000837B1 EP 21208607 A EP21208607 A EP 21208607A EP 4000837 B1 EP4000837 B1 EP 4000837B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- chassis
- machine according
- vibratory source
- detachable connector
- 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.)
- Active
Links
- 238000010276 construction Methods 0.000 title description 24
- 230000005540 biological transmission Effects 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 15
- 238000007667 floating Methods 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 235000011837 pasties Nutrition 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000003071 parasitic effect Effects 0.000 description 12
- 239000006096 absorbing agent Substances 0.000 description 11
- 230000035939 shock Effects 0.000 description 11
- 239000004033 plastic Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- -1 screeds Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0887—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing provided with sieves or filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/40—Resonant vibration screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0893—Mobile mixing devices, e.g. hanging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
- B28C5/1253—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with discharging devices
- B28C5/1261—Applying pressure for discharging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
- B28C5/1292—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with rotating stirring and feeding or discharging means fixed on the same axis, e.g. in an inclined container fed at its lower part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
- B28C7/064—Supply from sacks; Sack openers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
- B28C7/162—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure
- B28C7/167—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure by means of a screw conveyor
Definitions
- This presentation concerns a construction site machine configured for pumping and/or mixing pasty and viscous products such as mortars, concretes, fluid screeds, and more generally all fluid products used in the field of building and construction.
- construction machines are typically used to pump and/or mix fluid, pasty and/or viscous products, such as mortars, screeds, cements or even concretes, in order to supply the needs of the construction site for such products.
- Such a construction machine 81 takes the form of a trailer fitted with wheels 82 and a hitch system 83. It includes a chassis 84, a pumping device 85 and a distribution module 86. It also includes a hopper 87, mounted on the chassis 84, closed by a lifting cover 88 in which an opening 89 is made.
- This hopper 87 is intended to receive a fluid product to be distributed on a construction site, for example a screed.
- a mixer truck thus supplies this hopper 87 with product through the opening 89.
- a screen 90 is provided at the top of the hopper 87 in order to retain any large undesirable particles such as stones.
- Such a construction machine 81 also includes a drive device 91 mounted in the chassis 84, associating a thermal engine, for example of the diesel type, with a hydraulic machine.
- the output shaft 92 of this drive device is coupled to a transmission shaft 93 using a first coupling part 94.
- the transmission shaft 93 carries transmission means 93a intended to facilitate the transport of the fluid product towards the outlet orifice of the hopper 87.
- these means of transmission take the shape of an Archimedes screw 93a but it could also be pallets, to cite only these examples.
- a vibrator 94 is mounted on one of the sides of the frame 90a carrying the grid 90.
- Such a vibrator 94 makes it possible to animate the grid 90 with a vibratory movement allowing to facilitate the flow of the fluid product.
- the vibrator due to its position along the grid, the vibrator is exposed to possible projections of the fluid product, or of solid elements present in the latter, which can damage the vibrator or even an element providing the energy necessary for the operation of the vibrator, an electric cable for example.
- This presentation concerns a construction machine, configured for pumping and/or mixing fluid, pasty and/or viscous products such as mortars, concretes and fluid screeds, comprising a chassis, a receptacle, mounted on the chassis, defining a reception volume and an introduction opening opening into the reception volume, a screen, mounted in a removable or retractable manner relative to the chassis, having a working position in which the screen extends over the introduction opening , and a vibration source, in which the vibration source is mounted on the frame, remote from the screen, and in which the vibration source is configured to transmit to the screen, when the screen is in its working position, a vibratory movement via a vibratory transmission comprising a disengageable connector.
- this disengageable connector it is possible to deport the vibration source while preserving the removability or retractable nature of the screen in order, in particular, to be able to easily access the interior of the receiving volume without it being necessary to dismantle the screen or another element transmitting the vibratory movement.
- the vibration transmission and in particular the disengageable connector, is configured to maintain the connection between the vibration source and the screen under the sole effect of the weight of the screen. In other words, no tools or any manipulation of the disengageable connector are necessary to establish and maintain the connection once the screen is installed in the working position. This greatly facilitates the use of the machine, particularly when it is desired to remove or retract the screen.
- the vibration transmission and in particular the disengageable connector, comprises a quick fixing device making it possible to maintain the connection between the vibration source and the screen.
- This quick fixing device may in particular include a latch, a pin or even an eccentric handle. In such a case, establishing and breaking the connection can be done simply and easily, by simply manipulating the quick fixing device, without having to use any tool.
- the vibration transmission and in particular the disengageable connector, comprises a bolted fixing.
- the disengageable connector comprises a female part, secured to an element among the vibration source and the screen, and a male part, secured to the other element among the vibration source and the screen, configured to engage in the female part.
- the connection can be established simply and quickly by simply engaging the male part in the female part.
- the female part is attached to the vibration source and the male part is attached to the screen. In this way, it is easier to establish the connection of the disengageable connector when placing the screen in its working position.
- the female part and the male part of the disengageable connector each have a frustoconical portion.
- a frustoconical shape facilitates engagement of the male part in the female part and guarantees at least one point of contact between the female part and the male part.
- said frustoconical portions are frustoconical in revolution; in other words, they are truncated cones of revolution.
- said frustoconical portions are truncated pyramids, for example with 3 or 4 faces.
- the taper of the female part is substantially equal to the taper of the male part.
- the cone angle formed by the male part is between 3 and 50°, preferably between 15 and 35°, more preferably between 20 and 30°. These angle ranges make it possible to reduce, or even completely eliminate, the appearance of parasitic vertical movements of the screen. Indeed, the inventors noted that the frustoconical shape of the disengageable connector could cause, under the effect of vibrations, a vortex movement of the male part of the connector within the female part: the male part then tends to move up the along the female part before going back down, which generates a significant noise and high energy loss reducing the efficiency of the vibration source.
- the cone angle formed by the female part is between 3 and 50°, preferably between 15 and 35°, more preferably between 20 and 30°.
- the contact material of at least one element among the female part and the male part of the disengageable connector is softer than the contact material of the other element among the female part and the male part.
- Vickers hardness can for example be used. This makes it possible to reduce the wear of the disengageable connector or, at least, to favor the wear of one of the parts of the connector compared to the other.
- the softer material may be that of the female part.
- one may be a polymeric material, of the plastic type for example, that is to say non-elastomeric, while the other may be a metal, stainless steel for example.
- the female part of the disengageable connector comprises a contact pad made of polymeric material, of the plastic type for example, that is to say non-elastomeric.
- a trim makes it possible to attenuate the noise generated by possible parasitic movements of the connector.
- Such a trim can also be removable, which facilitates its replacement in the event of wear.
- At least one of the parts of the disengageable connector is provided on one of the side walls of the screen, preferably its rear surface.
- this part can be carried by a bracket projecting from the surface of the screen.
- the part of the disengageable connector secured to the screen is centered laterally in relation to the center of gravity of the screen. In this way, the transmission of the vibratory movement to the screen is facilitated. In particular, the appearance of parasitic moments which can cause parasitic movements and therefore additional noise and energy loss reducing the efficiency of the vibration source is reduced.
- the part of the disengageable connector secured to the screen is centered in elevation relative to the center of gravity of the screen. In this way, the transmission of the vibratory movement to the screen is facilitated. In particular, the appearance of parasitic moments which can cause parasitic movements and therefore additional noise is reduced.
- the vibration source is mounted floating relative to the chassis, preferably via shock absorbers.
- shock absorbers can in particular be of the silent block, spring or even rubber cylinder type.
- the vibration source is mounted on the chassis via a console mounted on the chassis in a floating manner, preferably via shock absorbers.
- shock absorbers can in particular be of the silent block, spring or even rubber cylinder type. In this way, we prevent the vibrations generated by the vibration source from propagating to the chassis.
- the vibration source can for its part be rigidly mounted on the console.
- the part of the disengageable connector secured to the vibration source is provided on the console. This part can for example be located at the end of an arm extending towards the front of the machine.
- the console is a substantially flat part extending in a horizontal plane.
- the console has at least three, and preferably exactly three, attachment points, not aligned, with the chassis.
- At least one console attachment point secures the console from below and at least one console attachment point secures the console from above. In this way, the shock absorbers of all the attachment points act in compression, which tends to perpetuate them.
- the center of gravity of the screen is positioned substantially in the horizontal plane of the console when the screen is in its working position. In this way, the transmission of vibratory movement in the sieve is facilitated. In particular, the appearance of parasitic moments which can cause parasitic movements and therefore additional noise is reduced.
- the vibration source is configured to generate vibrations in a horizontal plane.
- the vibration source is a pneumatic or electric vibrator.
- the center of gravity of the vibration source is positioned substantially in the horizontal plane of the console. In this way, the transmission of the vibratory movement to the screen is facilitated. In particular, the appearance of parasitic moments which can cause parasitic movements and therefore additional noise is reduced.
- the screen is pivotable relative to the frame. This allows easy access to the interior of the receiving volume.
- the screen is configured to pivot about a horizontal axis, preferably about the right-left direction of the machine.
- the screen may comprise bearings arranged at its side opposite the disengageable connector, preferably at its front side.
- each bearing includes a shock absorber: each bearing can also be carried by a support mounted on a shock absorber.
- the screen is removable and interchangeable. Beyond being able to provide access to the interior of the reception volume, this makes it possible to easily change the screen depending on the product used, for example.
- the screen is mounted floating relative to the frame, preferably via shock absorbers.
- shock absorbers can in particular be of the silent block, spring or even rubber cylinder type.
- the screen is carried by the chassis in its working position via at least three support points, and preferably exactly three support points.
- two support points of the screen are formed by bearings.
- a support point of the screen is formed by the disengageable connector.
- the screen rests on the disengageable connector when it is in its working position.
- the mass of the screen thus makes it possible to maintain the connection of the disengageable connector.
- the receptacle is a hopper allowing the flow of the product towards a discharge line.
- the delivery line comprises at least one spiral transmission shaft.
- the delivery line comprises at least one progressive cavity pump.
- FIG. 3 illustrates an example of construction machine 1 according to the presentation.
- This construction machine 1 takes the form of a trailer fitted with wheels 2 and a hitch system 3. It comprises a chassis 10, a pumping device 20 and a distribution module 30.
- the construction machine 1 also includes a hopper 11, mounted in the chassis 10 and intended to receive a fluid, viscous and/or pasty product brought by a mixer truck.
- a screen 40 is provided at the top of the hopper 11, allowing, in addition to its safety and protection function against rotating elements, to retain any large undesirable particles such as stones.
- This screen 40 comprises a rectangular frame 41, formed of four side walls 41a-41d, and a plurality of angles 42 extending between the left side walls 41b and right 41d of the frame 41. These angles 42 are rectilinear and extend all parallel in the same plane; they have a chevron shape with the edge pointing upwards.
- the screen 40 is pivotally mounted on the chassis 10 via bearings 43 provided at the front of the frame 41, more precisely at the front end of the left side walls 41b and right 41d.
- These bearings 43 have the particularity of being floating, that is to say they have a damping member making it possible to reduce the transmission of parasitic movements such as vibrations between the screen 40 and the chassis 10.
- the screen 40 can be pivoted between a horizontal working position, shown on the Figure 3 for example, in which it is interposed in front of the introduction opening of the hopper 11, and a raised position, shown on the figure 4 for example, in which it is raised in a vertical position, or beyond the vertical, and thus leaves free access to the interior volume of the hopper 11.
- the construction machine 1 also includes a vibration system 50 including a vibrator 51 forming a vibration source.
- the vibrator 51 is an electric vibrator having a vertical axis on which an eccentric flyweight is provided. It therefore produces a vibratory movement propagating essentially in the horizontal plane. This vibratory movement is transmitted to the screen 40 via a vibration transmission.
- the vibration system 50 also includes a console 52, forming part of this vibration transmission, allowing the fixing of the vibrator 51 on the chassis 10.
- This console 52 takes the form of a planar frame having three uprights, a front upright 53a and two uprights lateral 53b, 53c, organized in an isosceles triangle.
- the vibrator 51 is rigidly fixed on a fixing portion 54 of the console 52 provided at the intersection of the two side uprights 53b, 53c.
- the console 52 also includes three fixing points 55a, 55b, 55c, located at the three intersections of the three uprights 53a-53c.
- the two front fixing points 55a and 55b are fixed on a beam 12 of the chassis 10 extending horizontally in the left-right direction of the machine 1. This fixing is ensured in a floating manner by means of shock absorbers 56 of the type silent block.
- the rear attachment point 55c is fixed for its part on a structural arm 13 attached rigidly to the chassis 10 and extending substantially vertically; more precisely, the rear fixing point 55c is fixed under a bracket 13a extending horizontally from the structural arm 13.
- This fixing is also ensured in a floating manner by means of a shock absorber 56 of the silent block type.
- the vibrations produced by the vibrator 51 do not propagate, or practically not, to the chassis 10.
- the vibratory movement of the vibrator 51 is on the other hand transmitted to the screen 40, when it is in its working position, via a disengageable connector 60.
- This disengageable connector 60 forming part of the vibratory transmission, comprises a part male 61, carried by the screen 40, and a female part 66, carried by the console 52 of the vibratory system 50.
- the male part 61 takes the form of a finger 62 having a frustoconical profile.
- This finger 62 extends vertically downwards from a bracket 44 provided in the middle of the rear side wall 41a of the frame 41 of the screen 40.
- the finger 62 is removable in order to be able to replace it in the event of wear.
- this finger 62 is made of stainless steel; the angle formed by its conicity is equal to 25°.
- the female part 66 takes the form of a ring 67 having a frustoconical interior surface.
- the central axis of this interior surface extends vertically; the angle formed by its conicity is equal to that of finger 62, or 25° in this example.
- This ring 67 is a trim fitted into a cavity 57 of the console 52, this cavity 57 being provided at the end of an arm 58 extending forwards from the middle of the front upright 53a of the console 52.
- this ring 67 is made of hard plastic, more precisely PA6.
- the finger 62 engages in the ring 67, which connects the screen 40 to the vibratory system 50: the vibratory movement of vibrator 51 can thus propagate up to the screen 40 .
- the position of the finger 62 is designed to be located substantially on the front-rear axis passing through the center of gravity of the screen 40.
- the ring 67 and more generally the entire console 52, is designed to be located substantially in the horizontal plane passing through the center of gravity of the vibrator 51. In this way, when the screen 40 is in its working position, the vibratory movement of the vibrator can propagate to the screen while minimizing the losses of energy and the appearance of parasitic moments.
- the disengageable connector 60 then forms a third point of support for the screen 40 when it is in its position of work.
- the weight alone of the screen 40 makes it possible to effectively maintain the connection of the disengageable connector.
- the construction machine takes the form of a trailer mounted on wheels but it goes without saying that it could also be fitted with skids to simply be placed on the construction site or even that it could be mounted in a vehicle.
- the machine performs both a mixing function and a pumping function of the fluid product but it goes without saying that it could only perform one of these functions, for example only mixing. .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Road Paving Machines (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Description
Le présent exposé concerne une machine de chantier configurée pour le pompage et/ou le malaxage de produits pâteux et visqueux tels que les mortiers, bétons, chapes fluides, et plus généralement tous les produits fluides utilisés dans le domaine du bâtiment et de la construction.This presentation concerns a construction site machine configured for pumping and/or mixing pasty and viscous products such as mortars, concretes, fluid screeds, and more generally all fluid products used in the field of building and construction.
Dans le domaine du bâtiment, sur un chantier, on utilise classiquement des machines de chantier permettant de pomper et/ou de malaxer des produits fluides, pâteux et/ou visqueux, tels que mortiers, chapes, ciments ou encore bétons, afin d'alimenter les besoins du chantier en de tels produits.In the building sector, on a construction site, construction machines are typically used to pump and/or mix fluid, pasty and/or viscous products, such as mortars, screeds, cements or even concretes, in order to supply the needs of the construction site for such products.
Un exemple d'une telle machine de chantier selon l'état de la technique est représenté sur les
Une telle machine de chantier 81 comprend également un dispositif d'entraînement 91 monté dans le châssis 84, associant un moteur thermique, par exemple du type diesel, à une machine hydraulique. L'arbre de sortie 92 de ce dispositif d'entraînement est accouplé à un arbre de transmission 93 à l'aide d'une première pièce d'accouplement 94. L'arbre de transmission 93 porte des moyens de transmission 93a destinés à faciliter le transport du produit fluide vers l'orifice de sortie de la trémie 87. Ici, ces moyens de transmission prennent la forme d'une vis d'Archimède 93a mais il pourrait également s'agir de palettes, pour ne citer que ces exemples.Such a
Classiquement, dans une telle machine de l'état de la technique, un vibrateur 94 est monté sur l'un des côtés du cadre 90a portant la grille 90. Un tel vibrateur 94 permet d'animer la grille 90 d'un mouvement vibratoire permettant de faciliter l'écoulement du produit fluide.Conventionally, in such a machine of the state of the art, a
Toutefois, un tel vibrateur possède une masse importante, ce qui entraîne des problèmes de tenue mécanique. En particulier, puisque le vibrateur est monté directement sur l'organe recevant les vibrations, on constate généralement un desserrement progressif des éléments de fixation du vibrateur sous l'effet des vibrations.However, such a vibrator has a significant mass, which causes mechanical strength problems. In particular, since the vibrator is mounted directly on the member receiving the vibrations, there is generally a progressive loosening of the fixing elements of the vibrator under the effect of the vibrations.
De plus, du fait de sa position le long de la grille, le vibrateur est exposé à d'éventuelles projections du produit fluide, ou d'éléments solides présents dans ce dernier, ce qui peut endommager le vibrateur ou encore un élément fournissant l'énergie nécessaire au fonctionnement du vibrateur, un câble électrique par exemple.In addition, due to its position along the grid, the vibrator is exposed to possible projections of the fluid product, or of solid elements present in the latter, which can damage the vibrator or even an element providing the energy necessary for the operation of the vibrator, an electric cable for example.
Il existe donc un réel besoin pour une machine de chantier configurée pour le pompage et/ou le malaxage de produits fluides, pâteux et/ou visqueux tels que les mortiers, bétons et chapes fluides, et qui soit dépourvue, au moins en partie, des inconvénients inhérents à la configuration connue précitée. Il est à noter que la demande de brevet
Le présent exposé concerne une machine de chantier, configurée pour le pompage et/ou le malaxage de produits fluides, pâteux et/ou visqueux tels que les mortiers, bétons et chapes fluides, comprenant un châssis, un réceptacle, monté sur le châssis, définissant un volume de réception et une ouverture d'introduction débouchant dans le volume de réception, un crible, monté de manière amovible ou escamotable par rapport au châssis, possédant une position de travail dans laquelle le crible s'étend sur l'ouverture d'introduction, et une source vibratoire, dans laquelle la source vibratoire est montée sur le châssis, à distance du crible, et dans laquelle la source vibratoire est configurée pour transmettre au crible, lorsque le crible se trouve dans sa position de travail, un mouvement vibratoire par l'intermédiaire d'une transmission vibratoire comprenant un connecteur débrayable.This presentation concerns a construction machine, configured for pumping and/or mixing fluid, pasty and/or viscous products such as mortars, concretes and fluid screeds, comprising a chassis, a receptacle, mounted on the chassis, defining a reception volume and an introduction opening opening into the reception volume, a screen, mounted in a removable or retractable manner relative to the chassis, having a working position in which the screen extends over the introduction opening , and a vibration source, in which the vibration source is mounted on the frame, remote from the screen, and in which the vibration source is configured to transmit to the screen, when the screen is in its working position, a vibratory movement via a vibratory transmission comprising a disengageable connector.
Ainsi, grâce à une telle configuration, il est possible d'animer le crible d'un mouvement vibratoire tout en déportant la source vibratoire à distance du crible. De cette manière, il est possible de protéger la source vibratoire de l'environnement du crible, et donc d'empêcher une dégradation prématurée de la source vibratoire.Thus, thanks to such a configuration, it is possible to animate the screen with a vibratory movement while moving the vibration source away from the screen. In this way, it is possible to protect the vibration source from the environment of the screen, and therefore to prevent premature degradation of the vibration source.
De plus, puisque la source vibratoire est désormais montée sur le châssis, et non plus sur le crible, la tenue mécanique de l'ensemble est renforcée. En particulier, ceci permet de reporter la masse du vibrateur sur le châssis de la machine et donc d'alléger le crible.In addition, since the vibration source is now mounted on the chassis, and no longer on the screen, the mechanical strength of the assembly is reinforced. In particular, this makes it possible to transfer the mass of the vibrator to the frame of the machine and therefore to lighten the screen.
Par ailleurs, grâce à ce connecteur débrayable, il est possible de déporter la source vibratoire tout en préservant l'amovibilité ou le caractère escamotable du crible afin, notamment, de pouvoir accéder facilement à l'intérieur du volume de réception sans qu'il soit nécessaire de démonter le crible ou un autre élément de transmission du mouvement vibratoire.Furthermore, thanks to this disengageable connector, it is possible to deport the vibration source while preserving the removability or retractable nature of the screen in order, in particular, to be able to easily access the interior of the receiving volume without it being necessary to dismantle the screen or another element transmitting the vibratory movement.
Dans certains modes de réalisation, la transmission vibratoire, et en particulier le connecteur débrayable, est configurée pour maintenir la connexion entre la source vibratoire et le crible sous le seul effet du poids du crible. Autrement dit, aucun outil ni aucune manipulation du connecteur débrayable n'est nécessaire pour établir et maintenir la connexion dès lors que le crible est installé dans la position de travail. Ainsi, on facilite grandement la mise en oeuvre de la machine, notamment lorsque l'on souhaite retirer ou escamoter le crible.In certain embodiments, the vibration transmission, and in particular the disengageable connector, is configured to maintain the connection between the vibration source and the screen under the sole effect of the weight of the screen. In other words, no tools or any manipulation of the disengageable connector are necessary to establish and maintain the connection once the screen is installed in the working position. This greatly facilitates the use of the machine, particularly when it is desired to remove or retract the screen.
Dans d'autres modes de réalisation, la transmission vibratoire, et en particulier le connecteur débrayable, comprend un dispositif de fixation rapide permettant de maintenir la connexion entre la source vibratoire et le crible. Ce dispositif de fixation rapide peut notamment comprendre une grenouillère, une goupille ou encore une poignée à excentrique. Dans un tel cas, l'établissement et la rupture de la connexion peut se faire de manière simple et aisée, par une simple manipulation du dispositif de fixation rapide, sans devoir recourir à un quelconque outil.In other embodiments, the vibration transmission, and in particular the disengageable connector, comprises a quick fixing device making it possible to maintain the connection between the vibration source and the screen. This quick fixing device may in particular include a latch, a pin or even an eccentric handle. In such a case, establishing and breaking the connection can be done simply and easily, by simply manipulating the quick fixing device, without having to use any tool.
Dans d'autres modes de réalisation, la transmission vibratoire, et en particulier le connecteur débrayable, comprend une fixation boulonnée.In other embodiments, the vibration transmission, and in particular the disengageable connector, comprises a bolted fixing.
Dans certains modes de réalisation, le connecteur débrayable comprend une partie femelle, solidaire d'un élément parmi la source vibratoire et le crible, et une partie mâle, solidaire de l'autre élément parmi la source vibratoire et le crible, configurée pour s'engager dans la partie femelle. Ainsi, l'établissement de la connexion peut se faire simplement et rapidement par simple engagement de la partie male dans la partie femelle.In certain embodiments, the disengageable connector comprises a female part, secured to an element among the vibration source and the screen, and a male part, secured to the other element among the vibration source and the screen, configured to engage in the female part. Thus, the connection can be established simply and quickly by simply engaging the male part in the female part.
Dans certains modes de réalisation, la partie femelle est solidaire de la source vibratoire et la partie mâle est solidaire du crible. De cette manière, il est plus aisé d'établir la connexion du connecteur débrayable lors de la mise en place du crible dans sa position de travail.In certain embodiments, the female part is attached to the vibration source and the male part is attached to the screen. In this way, it is easier to establish the connection of the disengageable connector when placing the screen in its working position.
Dans certains modes de réalisation, la partie femelle et la partie mâle du connecteur débrayable possèdent chacune une portion tronconique. Une telle forme tronconique facilite l'engagement de la partie mâle dans la partie femelle et garantit au moins un point de contact entre la partie femelle et la partie mâle.In certain embodiments, the female part and the male part of the disengageable connector each have a frustoconical portion. Such a frustoconical shape facilitates engagement of the male part in the female part and guarantees at least one point of contact between the female part and the male part.
Dans certains modes de réalisation, lesdites portions tronconiques sont tronconiques de révolution ; autrement dit, il s'agit de troncs de cônes de révolution.In certain embodiments, said frustoconical portions are frustoconical in revolution; in other words, they are truncated cones of revolution.
Dans certains modes de réalisation, lesdites portions tronconiques sont des troncs de pyramides, par exemple à 3 ou 4 faces.In certain embodiments, said frustoconical portions are truncated pyramids, for example with 3 or 4 faces.
Dans certains modes de réalisation, la conicité de la partie femelle est sensiblement égale à la conicité de la partie mâle.In certain embodiments, the taper of the female part is substantially equal to the taper of the male part.
Dans certains modes de réalisation, l'angle de cône formé par la partie mâle est compris entre 3 et 50°, de préférence entre 15 et 35°, de préférence encore entre 20 et 30°. Ces plages d'angle permettent de réduire, voire de supprimer complètement, l'apparition de mouvements parasites verticaux du crible. En effet, les inventeurs ont constaté que la forme tronconique du connecteur débrayable pouvait entraîner, sous l'effet des vibrations, un mouvement de vortex de la partie male du connecteur au sein de la partie femelle : la partie mâle a alors tendance à remonter le long de la partie femelle avant de redescendre, ce qui génère un bruit important et une forte déperdition d'énergie réduisant le rendement de la source vibratoire.In certain embodiments, the cone angle formed by the male part is between 3 and 50°, preferably between 15 and 35°, more preferably between 20 and 30°. These angle ranges make it possible to reduce, or even completely eliminate, the appearance of parasitic vertical movements of the screen. Indeed, the inventors noted that the frustoconical shape of the disengageable connector could cause, under the effect of vibrations, a vortex movement of the male part of the connector within the female part: the male part then tends to move up the along the female part before going back down, which generates a significant noise and high energy loss reducing the efficiency of the vibration source.
Dans certains modes de réalisation, l'angle de cône formé par la partie femelle est compris entre 3 et 50°, de préférence entre 15 et 35°, de préférence encore entre 20 et 30°.In certain embodiments, the cone angle formed by the female part is between 3 and 50°, preferably between 15 and 35°, more preferably between 20 and 30°.
Dans certains modes de réalisation, le matériau de contact d'au moins un élément parmi la partie femelle et la partie mâle du connecteur débrayable est plus mou que le matériau de contact de l'autre élément parmi la partie femelle et la partie mâle. A cet égard, la dureté Vickers peut par exemple être utilisée. Ceci permet de réduire l'usure du connecteur débrayable ou, tout au moins, de privilégier l'usure de l'une des parties du connecteur par rapport à l'autre. En particulier, le matériau plus mou peut être celui de la partie femelle. Par exemple, l'un peut être un matériau polymérique, du type plastique par exemple, c'est-à-dire non élastomérique, tandis que l'autre peut être un métal, de l'acier inoxydable par exemple.In certain embodiments, the contact material of at least one element among the female part and the male part of the disengageable connector is softer than the contact material of the other element among the female part and the male part. In this regard, Vickers hardness can for example be used. This makes it possible to reduce the wear of the disengageable connector or, at least, to favor the wear of one of the parts of the connector compared to the other. In particular, the softer material may be that of the female part. For example, one may be a polymeric material, of the plastic type for example, that is to say non-elastomeric, while the other may be a metal, stainless steel for example.
Dans certains modes de réalisation, la partie femelle du connecteur débrayable comprend une garniture de contact en matériau polymérique, du type plastique par exemple, c'est-à-dire non élastomérique. En plus des avantages décrits ci-dessus, une telle garniture permet d'atténuer le bruit généré par les éventuels mouvements parasites du connecteur. Une telle garniture peut de plus être amovible, ce qui facilite son remplacement en cas d'usure.In certain embodiments, the female part of the disengageable connector comprises a contact pad made of polymeric material, of the plastic type for example, that is to say non-elastomeric. In addition to the advantages described above, such a trim makes it possible to attenuate the noise generated by possible parasitic movements of the connector. Such a trim can also be removable, which facilitates its replacement in the event of wear.
Dans certains modes de réalisation, au moins l'une des parties du connecteur débrayable est prévue sur l'une des parois latérales du crible, de préférence sa surface arrière. En particulier, cette partie peut être portée par une applique faisant saillie sur la surface du crible.In certain embodiments, at least one of the parts of the disengageable connector is provided on one of the side walls of the screen, preferably its rear surface. In particular, this part can be carried by a bracket projecting from the surface of the screen.
Dans certains modes de réalisation, la partie du connecteur débrayable solidaire du crible est centrée latéralement par rapport au centre de gravité du crible. De cette manière, la transmission du mouvement vibratoire au crible est facilitée. On réduit en particulier l'apparition de moments parasites pouvant engendrer des mouvements parasites et donc du bruit supplémentaire et une déperdition d'énergie réduisant le rendement de la source vibratoire.In certain embodiments, the part of the disengageable connector secured to the screen is centered laterally in relation to the center of gravity of the screen. In this way, the transmission of the vibratory movement to the screen is facilitated. In particular, the appearance of parasitic moments which can cause parasitic movements and therefore additional noise and energy loss reducing the efficiency of the vibration source is reduced.
Dans certains modes de réalisation, la partie du connecteur débrayable solidaire du crible est centrée en élévation par rapport au centre de gravité du crible. De cette manière, la transmission du mouvement vibratoire au crible est facilitée. On réduit en particulier l'apparition de moments parasites pouvant engendrer des mouvements parasites et donc du bruit supplémentaire.In certain embodiments, the part of the disengageable connector secured to the screen is centered in elevation relative to the center of gravity of the screen. In this way, the transmission of the vibratory movement to the screen is facilitated. In particular, the appearance of parasitic moments which can cause parasitic movements and therefore additional noise is reduced.
Dans certains modes de réalisation, la source vibratoire est montée flottante par rapport au châssis, de préférence par l'intermédiaire d'amortisseurs. De cette manière, les vibrations générées par la source vibratoire ne se propagent pas au châssis et, notamment, au volume de réception. Ces amortisseurs peuvent notamment être du type silent bloc, ressort ou bien encore cylindre en caoutchouc.In certain embodiments, the vibration source is mounted floating relative to the chassis, preferably via shock absorbers. In this way, the vibrations generated by the vibration source do not propagate to the chassis and, in particular, to the receiving volume. These shock absorbers can in particular be of the silent block, spring or even rubber cylinder type.
Dans certains modes de réalisation, la source vibratoire est montée sur le châssis par l'intermédiaire d'une console montée sur le châssis de manière flottante, de préférence par l'intermédiaire d'amortisseurs. Ces amortisseurs peuvent notamment être du type silent bloc, ressort ou bien encore cylindre en caoutchouc. De cette manière, on évite que les vibrations générées par la source vibratoire se propagent jusqu'au châssis. La source vibratoire peut pour sa part être montée de manière rigide sur la console.In some embodiments, the vibration source is mounted on the chassis via a console mounted on the chassis in a floating manner, preferably via shock absorbers. These shock absorbers can in particular be of the silent block, spring or even rubber cylinder type. In this way, we prevent the vibrations generated by the vibration source from propagating to the chassis. The vibration source can for its part be rigidly mounted on the console.
Dans certains modes de réalisation, la partie du connecteur débrayable solidaire de la source vibratoire est prévue sur la console. Cette partie peut par exemple se situer à l'extrémité d'un bras s'étendant vers l'avant de la machine.In certain embodiments, the part of the disengageable connector secured to the vibration source is provided on the console. This part can for example be located at the end of an arm extending towards the front of the machine.
Dans certains modes de réalisation, la console est une pièce sensiblement plane s'étendant dans un plan horizontal.In certain embodiments, the console is a substantially flat part extending in a horizontal plane.
Dans certains modes de réalisation, la console possède au moins trois, et de préférence exactement trois, points de fixation, non alignés, avec le châssis.In some embodiments, the console has at least three, and preferably exactly three, attachment points, not aligned, with the chassis.
Dans certains modes de réalisation, au moins un point de fixation de la console fixe la console par le dessous et au moins un point de fixation de la console fixe la console par le dessus. De cette manière, les amortisseurs de tous les points de fixation agissent en compression, ce qui tend à les pérenniser.In some embodiments, at least one console attachment point secures the console from below and at least one console attachment point secures the console from above. In this way, the shock absorbers of all the attachment points act in compression, which tends to perpetuate them.
Dans certains modes de réalisation, le centre de gravité du crible se positionne sensiblement dans le plan horizontal de la console lorsque le crible se trouve dans sa position de travail. De cette manière, la transmission du mouvement vibratoire au crible est facilitée. On réduit en particulier l'apparition de moments parasites pouvant engendrer des mouvements parasites et donc du bruit supplémentaire.In certain embodiments, the center of gravity of the screen is positioned substantially in the horizontal plane of the console when the screen is in its working position. In this way, the transmission of vibratory movement in the sieve is facilitated. In particular, the appearance of parasitic moments which can cause parasitic movements and therefore additional noise is reduced.
Dans certains modes de réalisation, la source vibratoire est configurée pour générer des vibrations dans un plan horizontal.In some embodiments, the vibration source is configured to generate vibrations in a horizontal plane.
Dans certains modes de réalisation, la source vibratoire est un vibrateur pneumatique ou électrique.In some embodiments, the vibration source is a pneumatic or electric vibrator.
Dans certains modes de réalisation, le centre de gravité de la source vibratoire se positionne sensiblement dans le plan horizontal de la console. De cette manière, la transmission du mouvement vibratoire au crible est facilitée. On réduit en particulier l'apparition de moments parasites pouvant engendrer des mouvements parasites et donc du bruit supplémentaire.In certain embodiments, the center of gravity of the vibration source is positioned substantially in the horizontal plane of the console. In this way, the transmission of the vibratory movement to the screen is facilitated. In particular, the appearance of parasitic moments which can cause parasitic movements and therefore additional noise is reduced.
Dans certains modes de réalisation, le crible est pivotant par rapport au châssis. Ceci permet d'accéder facilement à l'intérieur du volume de réception.In certain embodiments, the screen is pivotable relative to the frame. This allows easy access to the interior of the receiving volume.
Dans certains modes de réalisation, le crible est configuré pour pivoter autour d'un axe horizontal, de préférence autour de la direction droite-gauche de la machine. En particulier, le crible peut comprendre des paliers disposés au niveau de son côté opposé au connecteur débrayable, de préférence au niveau de son côté avant. De préférence, chaque palier comprend un amortisseur : chaque palier peut également être porté par un support monté sur un amortisseur.In some embodiments, the screen is configured to pivot about a horizontal axis, preferably about the right-left direction of the machine. In particular, the screen may comprise bearings arranged at its side opposite the disengageable connector, preferably at its front side. Preferably, each bearing includes a shock absorber: each bearing can also be carried by a support mounted on a shock absorber.
Dans certains modes de réalisation, le crible est amovible et interchangeable. Au-delà de pouvoir donner accès à l'intérieur du volume de réception, ceci permet de changer facilement le crible en fonction du produit utilisé par exemple.In some embodiments, the screen is removable and interchangeable. Beyond being able to provide access to the interior of the reception volume, this makes it possible to easily change the screen depending on the product used, for example.
Dans certains modes de réalisation, le crible est monté flottant par rapport au châssis, de préférence par l'intermédiaire d'amortisseurs. De cette manière, les vibrations générées par la source vibratoire ne se propagent pas au châssis et, notamment, au volume de réception. Ces amortisseurs peuvent notamment être du type silent bloc, ressort ou bien encore cylindre en caoutchouc.In certain embodiments, the screen is mounted floating relative to the frame, preferably via shock absorbers. In this way, the vibrations generated by the vibration source do not propagate to the chassis and, in particular, to the receiving volume. These shock absorbers can in particular be of the silent block, spring or even rubber cylinder type.
Dans certains modes de réalisation, le crible est porté par le châssis dans sa position de travail par l'intermédiaire d'au moins trois points d'appui, et de préférence exactement trois points d'appui.In certain embodiments, the screen is carried by the chassis in its working position via at least three support points, and preferably exactly three support points.
Dans certains modes de réalisation, deux points d'appui du crible sont formés par des paliers.In certain embodiments, two support points of the screen are formed by bearings.
Dans certains modes de réalisation, un point d'appui du crible est formé par le connecteur débrayable.In certain embodiments, a support point of the screen is formed by the disengageable connector.
Dans certains modes de réalisation, le crible repose sur le connecteur débrayable lorsqu'il se trouve dans sa position de travail. La masse du crible permet ainsi de maintenir la connexion du connecteur débrayable.In certain embodiments, the screen rests on the disengageable connector when it is in its working position. The mass of the screen thus makes it possible to maintain the connection of the disengageable connector.
Dans certains modes de réalisation, le réceptacle est une trémie permettant l'écoulement du produit vers une ligne de refoulement.In certain embodiments, the receptacle is a hopper allowing the flow of the product towards a discharge line.
Dans certains modes de réalisation, la ligne de refoulement comprend au moins un arbre de transmission à spires.In certain embodiments, the delivery line comprises at least one spiral transmission shaft.
Dans certains modes de réalisation, la ligne de refoulement comprend au moins une pompe à cavités progressantes.In certain embodiments, the delivery line comprises at least one progressive cavity pump.
Les caractéristiques et avantages précités, ainsi que d'autres, apparaîtront à la lecture de la description détaillée qui suit, d'un exemple de réalisation de la machine de chantier proposée. Cette description détaillée fait référence aux dessins annexés.The aforementioned characteristics and advantages, as well as others, will appear on reading the detailed description which follows, of an example of production of the proposed construction machine. This detailed description refers to the accompanying drawings.
Les dessins annexés sont schématiques et visent avant tout à illustrer les principes de l'exposé.The accompanying drawings are schematic and aim above all to illustrate the principles of the presentation.
Sur ces dessins, d'une figure à l'autre, des éléments (ou parties d'élément) identiques sont repérés par les mêmes signes de référence.
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Fig. 1 ] Lafigure 1 est une machine de chantier selon l'état de la technique. - [
Fig. 2 ] Lafigure 2 est une autre vue de la machine de chantier de lafigure 1 . - [
Fig. 3 ] Lafigure 3 est une vue en perspective d'une machine de chantier selon l'exposé. - [
Fig. 4 ] Lafigure 4 est une vue centrée sur le crible de la machine de lafigure 3 . - [
Fig. 5 ] Lafigure 5 est une vue éclatée du système vibratoire de la machine de lafigure 3 . - [
Fig. 6 ] Lafigure 6 est une vue en coupe du système vibratoire, crible relevé. - [
Fig. 7 ] Lafigure 7 est une vue en coupe du système vibratoire, crible dans sa position de travail.
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Fig. 1 ] Therefigure 1 is a construction machine according to the state of the art. - [
Fig. 2 ] Therefigure 2 is another view of the construction machine of thefigure 1 . - [
Fig. 3 ] ThereFigure 3 is a perspective view of a construction machine according to the presentation. - [
Fig. 4 ] ThereFigure 4 is a view centered on the machine screen of theFigure 3 . - [
Fig. 5 ] ThereFigure 5 is an exploded view of the vibration system of the machine of theFigure 3 . - [
Fig. 6 ] ThereFigure 6 is a sectional view of the vibratory system, screen raised. - [
Fig. 7 ] ThereFigure 7 is a sectional view of the vibratory system, screen in its working position.
Afin de rendre plus concret l'exposé, un exemple de machine de chantier est décrit en détail ci-après, en référence aux dessins annexés. Il est rappelé que l'invention ne se limite pas à cet exemple.In order to make the presentation more concrete, an example of a construction machine is described in detail below, with reference to the accompanying drawings. It is recalled that the invention is not limited to this example.
La
Comme cela est mieux visible sur la
Ce crible 40 comprend un cadre 41, rectangulaire, formés de quatre parois latérales 41a-41d, et une pluralité de cornières 42 s'étendant entre les parois latérales gauche 41b et droite 41d du cadre 41. Ces cornières 42 sont rectilignes et s'étendent toutes parallèlement dans un même plan ; elles possèdent une forme de chevron dont l'arête est dirigée vers le haut.This
Le crible 40 est monté en pivotement sur le châssis 10 par l'intermédiaire de paliers 43 prévus à l'avant du cadre 41, plus précisément à l'extrémité avant des parois latérales gauche 41b et droite 41d. Ces paliers 43 présentent la particularité d'être flottants, c'est-à-dire qu'ils possèdent un organe d'amortissement permettant de réduire la transmission des mouvements parasites tels que des vibrations entre le crible 40 et le châssis 10.The
Grâce à ces paliers 43, le crible 40 peut être pivoté entre une position de travail, horizontale, représentée sur la
La machine de chantier 1 comprend également un système vibratoire 50 incluant un vibrateur 51 formant une source vibratoire. Dans le présent exemple, le vibrateur 51 est un vibrateur électrique possédant un axe vertical sur lequel est prévue une masselotte excentrique. Il produit donc un mouvement vibratoire se propageant essentiellement dans le plan horizontal. Ce mouvement vibratoire est transmis au crible 40 par l'intermédiaire d'une transmission vibratoire.The construction machine 1 also includes a
Le système vibratoire 50 comprend également une console 52, faisant partie de cette transmission vibratoire, permettant la fixation du vibrateur 51 sur le châssis 10. Cette console 52 prend la forme d'une armature plane possédant trois montants, un montant avant 53a et deux montants latéraux 53b, 53c, organisés en triangle isocèle. Le vibrateur 51 est fixé rigidement sur une portion de fixation 54 de la console 52 prévue à l'intersection des deux montants latéraux 53b, 53c.The
La console 52 comprend également trois points de fixation 55a, 55b, 55c, situés aux trois intersections des trois montants 53a-53c. Les deux points de fixation avant 55a et 55b sont fixés sur une poutre 12 du châssis 10 s'étendant horizontalement dans la direction gauche-droite de la machine 1. Cette fixation est assurée de manière flottante par l'intermédiaire d'amortisseurs 56 du type silent bloc. Le point de fixation arrière 55c est fixé pour sa part sur un bras structural 13 rapporté rigidement sur le châssis 10 et s'étendant sensiblement verticalement ; plus précisément le point de fixation arrière 55c est fixé sous une applique 13a s'étendant horizontalement depuis le bras structural 13. Cette fixation est également assurée de manière flottante par l'intermédiaire d'un amortisseur 56 du type silent bloc. Ainsi, grâce à ces fixations flottantes, les vibrations produites par le vibrateur 51 ne se propagent pas, ou pratiquement pas, au châssis 10.The
Le mouvement vibratoire du vibrateur 51 est en revanche transmis au crible 40, lorsqu'il est dans sa position de travail, par l'intermédiaire d'un connecteur débrayable 60. Ce connecteur débrayable 60, faisant partie de la transmission vibratoire, comprend une partie male 61, portée par le crible 40, et une partie femelle 66, portée par la console 52 du système vibratoire 50.The vibratory movement of the
Plus précisément, la partie male 61 prend la forme d'un doigt 62 possédant un profil tronconique. Ce doigt 62 s'étend verticalement vers le bas à partir d'une applique 44 prévue au milieu de la paroi latérale arrière 41a du cadre 41 du crible 40. Le doigt 62 est amovible afin de pouvoir assurer son remplacement en cas d'usure. Dans le présent exemple, ce doigt 62 est réalisé en acier inoxydable ; l'angle formé par sa conicité est égal à 25°.More precisely, the
La partie femelle 66 prend pour sa part la forme d'une bague 67 possédant une surface intérieure tronconique. L'axe central de cette surface intérieure s'étend verticalement ; l'angle formé par sa conicité est égal à celui du doigt 62, soit 25° dans le présent exemple. Cette bague 67 est une garniture rapportée dans une cavité 57 de la console 52, cette cavité 57 étant prévue à l'extrémité d'un bras 58 s'étendant vers l'avant depuis le milieu du montant avant 53a de la console 52. Dans le présent exemple, cette bague 67 est réalisée en plastique dur, plus précisément en PA6.The
Ainsi, lorsque le crible 40 est dans sa position de travail, le doigt 62 s'engage dans la bague 67, ce qui connecte le crible 40 au système vibratoire 50 : le mouvement vibratoire de vibrateur 51 peut ainsi se propager jusqu'au crible 40.Thus, when the
A cet égard, la position du doigt 62 est prévue pour se situer sensiblement sur l'axe avant-arrière passant par le centre de gravité du crible 40. La bague 67, et plus généralement l'ensemble de la console 52, est prévue pour se situer sensiblement dans le plan horizontal passant par le centre de gravité du vibrateur 51. De cette manière, lorsque le crible 40 est dans sa position de travail, le mouvement vibratoire du vibrateur peut se propager jusqu'au crible en minimisant les déperditions d'énergie et l'apparition de moments parasites.In this regard, the position of the
On peut également noter que le connecteur débrayable 60 forme alors un troisième point d'appui pour le crible 40 lorsqu'il se trouve dans sa position de travail. En particulier, le poids seul du crible 40 permet de maintenir efficacement la connexion du connecteur débrayable.It can also be noted that the
A l'inverse, lorsqu'il est souhaité d'accéder au volume intérieur de la trémie 11, il suffit de pivoter le crible 40 autour des paliers 43 pour désengager le connecteur débrayable 60.Conversely, when it is desired to access the interior volume of the
Bien que la présente invention ait été décrite en se référant à des exemples de réalisation spécifiques, il est évident que des modifications et des changements peuvent être effectués sur ces exemples sans sortir de la portée générale de l'invention telle que définie par les revendications. Par conséquent, la description et les dessins doivent être considérés dans un sens illustratif plutôt que restrictif.Although the present invention has been described with reference to specific embodiments, it is evident that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. Therefore, the description and drawings should be considered in an illustrative rather than a restrictive sense.
En particulier, dans les exemples présentés, la machine de chantier prend la forme d'une remorque montée sur roues mais il va de soi qu'elle pourrait également être munis de patins pour être simplement posée sur le chantier ou bien encore qu'elle pourrait être montée dans un véhicule. De même, dans les exemples présentés, la machine exécute à la fois une fonction de malaxage et une fois de pompage du produit fluide mais il va de soi qu'elle pourrait ne réaliser que l'une de ces fonctions, par exemple uniquement un malaxage.In particular, in the examples presented, the construction machine takes the form of a trailer mounted on wheels but it goes without saying that it could also be fitted with skids to simply be placed on the construction site or even that it could be mounted in a vehicle. Likewise, in the examples presented, the machine performs both a mixing function and a pumping function of the fluid product but it goes without saying that it could only perform one of these functions, for example only mixing. .
Claims (9)
- A building site machine, configured for pumping and/or mixing fluid, pasty and/or viscous products such as mortars, concretes and fluid screeds, comprising:a chassis (10),a receptacle (11), mounted on the chassis (10), defining a receiving volume and an introduction aperture opening out into the receiving volume,a screen (40), mounted in a removable or retractable manner relative to the chassis (10), having a working position in which the screen (40) extends over the introduction aperture, anda vibratory source (51),wherein the vibratory source (51) is mounted away from the screen (40), andwherein the vibratory source (51) is configured to transmit to the screen, when the screen (40) is in its working position, a vibratory movement via a vibratory transmission comprising a detachable connector (60),characterized in that the vibratory source (13) is mounted on the chassis (10), andin that the detachable connector (60) is configured to maintain the connection between the vibratory source (51) and the screen (40) under the sole effect of the weight of the screen (40).
- The machine according to claim 1, wherein the detachable connector comprises a female portion (66), secured to one element (51) among the vibratory source and the screen, and a male portion (61), secured to the other element (40) among the vibratory source and the screen, configured to engage in the female portion (66), and
wherein the female portion (66) and the male portion (61) of the detachable connector each have a frustoconical section. - The machine according to claim 2, wherein the cone angle formed by the male portion (61) and/or by the female portion (66) is comprised between 3 and 50°, preferably between 15 and 35°, preferably between 20 and 30°.
- The machine according to claim 2 or 3, wherein the contact material of at least one element (66) among the female portion and the male portion of the detachable connector (60) is softer than the contact material of the other element (61) among the female portion and the male portion.
- The machine according to any one of claims 2 to 4, wherein at least one (61) of the portions of the detachable connector (60) is provided on one of the side walls (41a-41d) of the screen (40), preferably its rear surface (41a).
- The machine according to any one of claims 1 to 5, wherein the vibratory source (51) is mounted on the chassis (10) via a bracket (52) mounted on the chassis (10) in a floating manner, preferably via dampers (56), and
wherein the portion (66) of the detachable connector (60) secured to the vibratory source (51) is provided on the bracket (52). - The machine according to claim 6, wherein the center of gravity of the screen (40) is positioned substantially in the horizontal plane of the bracket (52) when the screen (40) is in its working position, and
wherein the center of gravity of the vibratory source (51) is positioned substantially in the horizontal plane of the bracket (52). - The machine according to any one of claims 1 to 7, wherein the screen (40) is mounted floating relative to the chassis (10), preferably via dampers.
- The machine according to any one of claims 1 to 8, wherein the screen (40) is carried by the chassis (10) in its working position via at least three bearing points,wherein two bearing points of the screen (40) are formed by bearings (43), andwherein a bearing point of the screen (40) is formed by the detachable connector (60).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2011847A FR3116226B1 (en) | 2020-11-18 | 2020-11-18 | Construction machine with remote vibration source |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4000837A1 EP4000837A1 (en) | 2022-05-25 |
EP4000837B1 true EP4000837B1 (en) | 2023-10-25 |
Family
ID=74125501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21208607.8A Active EP4000837B1 (en) | 2020-11-18 | 2021-11-16 | Machine for construction site with offset vibration source |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4000837B1 (en) |
ES (1) | ES2969940T3 (en) |
FR (1) | FR3116226B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115351907B (en) * | 2022-09-11 | 2023-11-21 | 南通铁建建设构件有限公司 | Special multifunctional concrete conveying system for prefabricated parts |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3664644A (en) * | 1970-07-06 | 1972-05-23 | Dale L Wicklund | Shaker screen apparatus for mortar mixers |
SU1276516A1 (en) * | 1985-05-06 | 1986-12-15 | Всесоюзный научно-исследовательский институт организации и механизации шахтного строительства | Mixing device |
EP1669180A3 (en) * | 2004-12-10 | 2006-12-13 | TURBOSOL PRODUZIONE S.p.A. | Machine for mixing and pumping mortar, plaster and cement mixes in general |
CA2870924C (en) * | 2013-11-14 | 2023-03-28 | Neil Anderson | Combined auger and screening apparatus for screening and conveyance of granular fertilizer or the like |
CN111152364A (en) * | 2020-03-03 | 2020-05-15 | 台州市椒江预提自动化设备有限公司 | Gravel and sand screening concrete mixing equipment |
-
2020
- 2020-11-18 FR FR2011847A patent/FR3116226B1/en active Active
-
2021
- 2021-11-16 EP EP21208607.8A patent/EP4000837B1/en active Active
- 2021-11-16 ES ES21208607T patent/ES2969940T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
FR3116226A1 (en) | 2022-05-20 |
EP4000837A1 (en) | 2022-05-25 |
FR3116226B1 (en) | 2023-02-24 |
ES2969940T3 (en) | 2024-05-23 |
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