EP1983824A2 - Spray bar for spraying products and product -spraying agricultural appliance - Google Patents

Spray bar for spraying products and product -spraying agricultural appliance

Info

Publication number
EP1983824A2
EP1983824A2 EP07731580A EP07731580A EP1983824A2 EP 1983824 A2 EP1983824 A2 EP 1983824A2 EP 07731580 A EP07731580 A EP 07731580A EP 07731580 A EP07731580 A EP 07731580A EP 1983824 A2 EP1983824 A2 EP 1983824A2
Authority
EP
European Patent Office
Prior art keywords
ramp
articulation
springs
connecting rod
pivoting
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.)
Withdrawn
Application number
EP07731580A
Other languages
German (de)
French (fr)
Inventor
Paulo Roberto Montagner
Sérgio BELLO DE CARVALHO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuhn SAS
Original Assignee
Kuhn SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kuhn SAS filed Critical Kuhn SAS
Publication of EP1983824A2 publication Critical patent/EP1983824A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A01M7/005—Special arrangements or adaptations of the spraying or distributing parts, e.g. adaptations or mounting of the spray booms, mounting of the nozzles, protection shields
    • A01M7/0053—Mounting of the spraybooms

Definitions

  • the present invention relates to the general technical field of spreading products and in particular to the field of spraying treatment products of the phytosanitary type.
  • the invention relates to a product spreading ramp (hereinafter: ramp) for an agricultural product spreading device (hereinafter: agricultural implement), equipped with a suspension device through which the ramp is intended to be linked to the frame of the agricultural apparatus, said suspension device comprising a connecting rod connecting said ramp to said frame, this connecting rod being connected to said frame via a first axis joint directed in the direction of advance during the work, and at the ramp by means of a second articulation axis also directed in the direction of advance during the work, said suspension device comprising springs intended to act against the pivoting of the ramp around the second articulation, and dampers for damping said pivoting of the ramp around said second articulation.
  • Such a suspension device fitted to a spray boom is known from document FR 2 813 212.
  • This prior document indeed describes a suspension device which comprises a connecting rod connecting the ramp to the frame of an agricultural spreading device. products of the agricultural sprayer type.
  • This connecting rod is connected to the chassis by means of a first articulation of axis directed in the direction of advance during the work, and to the ramp by means of a second articulation axis also directed in the direction of advance during work.
  • This known suspension device also comprises springs for acting against the pivoting of the ramp around the second articulation, and dampers for damping this movement of the ramp around this second articulation.
  • These springs and dampers extend between the ramp and a rudder which is secured to the connecting rod during work by means of a first hydraulic cylinder.
  • a second hydraulic cylinder is also provided between the frame and the connecting rod, which allows, during work, either to block the pivoting of the connecting rod around the first joint, or to dampen these pivoting movements.
  • the behavior of the ramp is not optimal on a rough terrain or slope.
  • the operator is obliged to correct Manually orienting the ramp with the first hydraulic cylinder called for this purpose "die cylinder", if the inclination of the ground under the wheels of the agricultural sprayer or its carrier does not match the slope of the ground.
  • the ramp under the effect of gravity, can not be oriented parallel to the inclination of the ground when the agricultural sprayer or its carrier vehicle works in the sloping slope.
  • the object of the present invention is to improve this known suspension device and to propose a suspension device which makes it possible to improve the behavior of the ramp, in particular to orient it appropriately, whatever the state and the configuration of the ground on which the farm implement or its carrier vehicle is moving.
  • said suspension device further comprises additional springs acting between the ramp and the frame of the agricultural machine and that the center of gravity of the ramp is substantially in the vicinity of the second joint, preferably somewhat below the second joint.
  • FIG. 1 represents a general view of an agricultural apparatus equipped with a ramp provided with a suspension device according to the invention
  • FIG. 2 shows a rear view of said suspension device and of the ramp when the agricultural apparatus is moving on flat ground
  • FIG. 1 represents an exemplary embodiment of a ramp (1) for an agricultural implement (2) equipped with a suspension device (3) according to the invention.
  • the purpose of the suspension device (3) is to suspend the ramp (1) from the frame (4) of the agricultural apparatus (2) such as a sprayer, for example by allowing the ramp ( 1) according to the configuration of the terrain on which the agricultural machine is moving (2).
  • This ramp (1) is intended in particular to spread, as uniformly as possible, fertilizers, treatment products of the phytosanitary type, or other types of products to be spread on the soil (S) or on crops.
  • the agricultural implement (2) is moved during the work in a direction and a direction of advance indicated by the arrow (A).
  • the ramp (1) is shown only partially in the figures.
  • the suspension device (3) has the particular role of absorbing and attenuating the movements of the tractor to prevent their direct and integral transmission to the ramp (1) so that it can have an optimal behavior in the field .
  • the suspension device (3) comprises a link rod (6) connecting the ramp (1) to the chassis (4) of the agricultural apparatus (2).
  • the connecting rod (6) is connected to the frame (4) by means of a first articulation (7) of substantially horizontal axis and substantially directed in the direction of advance (A) at work.
  • the ramp (1) is connected to the connecting rod (6) by means of a second articulation (8) of axis also substantially horizontal and also directed substantially in the direction of advance (A) at job.
  • the suspension device (3) according to the invention is thus of the "pendulum" type.
  • said ramp (1) has a central section (9) with, on either side, an arm (IA, IB) each made of one or more intermediate sections (10A, 10B) and a section external (not shown), these sections (10A, 10B) being, in known manner, respectively connected to each other by means of joints. Only a portion of the intermediate sections (10A, 10B) are shown in Figures 1 and 2. The outer sections are not shown in the figures. Each section (9, 10A, 10B) is intended to carry spreading means such as spray nozzles for example in the case of an agricultural sprayer, for spreading products on the soil (S) or crops.
  • the intermediate sections (10A, 10B) and the outer sections are arranged substantially symmetrically with respect to the median vertical plane (11) of the ramp (1).
  • the center of gravity (28) of the ramp (1) is substantially in the median vertical plane (11).
  • the arms (IA, IB) of the ramp (1) are deployed so as to cover a wide band of terrain: the ramp (1) thus extends transversely to the direction of advance (A) at work and substantially parallel to the ground (S).
  • the arms (IA, IB) are folded in a known manner so as to reduce the size of the ramp (1) and in particular to respect the size allowed to circulate on public roads.
  • the outer section and the intermediate section (s) (10A, 10B) of each arm (IA, IB) of the ramp (1) are folded substantially vertically, respectively unfolded substantially horizontally, via a respective actuator (13A, 13B) and a resilient system (14A, 14B) around the hinges connecting them to one another.
  • the actuators (13A, 13B) are for example hydraulic cylinders. Each actuator (13A, 13B) extends between the central section (9) and the respective adjacent intermediate section (10A, 10B). The corresponding outer section and, where appropriate, the additional intermediate section (s) (10A, 10B) are, for their part, folded, respectively unfolded thanks to the elastic system (14A, 14B). corresponding.
  • Each elastic system (14A, 14B) comprises for this purpose a traction member (15A, 15B) connected to a tension spring (16A, 16B).
  • the spring (16A, 16B) is connected at one of its ends to the connecting rod (6) at a corresponding attachment point (17A, 17B).
  • said spring (16A, 16B) is connected to a corresponding arm (IA, IB) of the ramp (1).
  • the spring (16A, 16B) is connected to the corresponding traction member (15A, 15B) acting on the additional intermediate section (s) (10A, 10B) and the respective outer section.
  • the first function of the springs (16A, 16B) is to unfold and refold this (these) intermediate section (s) (10A, 10B) additional (s) and the respective outer section.
  • the traction member (15A, 15B) is preferably a cable.
  • the tendency is to use agricultural implements (2) with an increasing working width and to work at ever higher speeds.
  • the faster we move the greater the risk of deforming or breaking parts of the agricultural machine (2) under the effect of high stresses that can then be generated.
  • the increase of the working speeds and the dimensions of the ramps (1) imposes a solid construction and an adequate suspension device (3).
  • the suspension device (3) of the ramp (1) of an agricultural implement (2) is therefore an essential component to ensure a good distribution of the product to be spread and to prevent deterioration which would cause wastes of time and costs. maintenance and repair that could be high.
  • the suspension device (3) uses the elastic systems (14A, 14B), and in particular their springs (16A, 16B), whose second function is to act on the against the pivoting of the ramp (1) around the second articulation (8) by absorbing and restoring the energy which gives an oscillatory movement to the ramp (1).
  • the suspension device (3) also comprises dampers (18A, 18B) which extend between the central section (9) and the connecting rod (6) and which make it possible to dampen the movements of the ramp (1) around of the second articulation (8).
  • the dampers (18A, 18B) reduce the duration of the oscillations by braking the amplitude of these oscillations, they dissipate the energy.
  • the dampers (18A, 18B) suppress the oscillation movement given by the springs (16A, 16B).
  • each spring (16A, 16B) is hooked on the connecting rod (6) by means of a hooking point (17A, 17B).
  • This attachment point (17A, 17B) is preferably in the vicinity of the second articulation (8) and substantially in the vicinity of the median vertical plane of the connecting rod (6), but does not coincide with said second articulation (8). ) so that the springs (16A, 16B) act with a certain lever arm on said second hinge (8).
  • the springs (16A, 16B) advantageously extend substantially horizontally and substantially perpendicular to the direction of advance (A).
  • the springs (16A, 16B) are advantageously positioned so that their respective line of action passes near the second articulation (8).
  • springs (16A, 16B) act with substantially equal and opposite forces on the connecting rod (6).
  • the position of the springs (16A, 16B) is symmetrical with respect to the median vertical plane (11) of the ramp (1). They allow the automatic refocusing of the ramp (1) relative to the second articulation (8) since they act against the pivoting of the ramp (1) around said second articulation (8).
  • These springs (16A, 16B) are relatively stiff, because they must also pull on the intermediate section (s) (10) additional (s) and the corresponding outer section to stiffen during work.
  • the degree of freedom, in pivoting, of the ramp (1) around the second articulation (8) is advantageously relatively limited, the springs (16A, 16B) allow displacements of small amplitude.
  • the dampers (18A, 18B) are arranged between the ramp (1), and more particularly the central section (9) thereof, and the connecting rod (6).
  • the connecting rod (6) comprises, on both sides, of its median plane a wing (19A, 19B) at the end of which is attached the shock absorber (18A, 18B) corresponding.
  • Said median plane of the connecting rod (6) being substantially coincident with the median plane (11) of the ramp (1), when the agricultural machine (2) is on a horizontal ground.
  • the two wings (19A, 19B) are symmetrical. In this way, the dampers (18A, 18B) are located substantially symmetrically with respect to the median plane (11) of the ramp (1).
  • each wing (19A, 19B) is intended to slide on a portion (4A, 4B) of the frame (4) with a certain friction during the pivoting of said connecting rod (6) around the first articulation (7).
  • the pivoting movements around the first articulation (7) are, in turn, dampened by friction of the connecting rod (6) on the frame (4).
  • each wing (19A, 19B) which is in contact with the frame (4), is equipped with friction pads (20A, 20B) via which said wing (19A, 19B) rubs on the corresponding part (4 A, 4B) of the frame (4).
  • the pivoting around the first articulation (7) is thus damped by the damping device (19A-4A, 19B-4B).
  • This damping device (19A-4A, 19B-4B) acts between the connecting rod (6) and the frame (4).
  • the suspension device (3) also comprises additional springs (21A, 21B) acting between the ramp (1) and the chassis (4).
  • the additional springs (21A, 21B) extend substantially symmetrically on either side of the median plane (11) of said ramp (1).
  • an additional spring (21A, 21B) extends on each side of said median plane (11).
  • the additional springs (2 IA, 21B) are two in number.
  • the springs (16A, 16B) also extend substantially symmetrically on either side of the median vertical plane (11).
  • Each spring (16A, 16B) is connected to one of the respective arms (IA, IB) of the ramp (1).
  • the center of gravity (28) of the ramp (1) is disposed substantially on the median vertical plane (11). In addition, it is substantially in the vicinity of the second articulation (8) and preferably somewhat below the latter.
  • the additional springs (2 IA, 21B) are advantageously arranged lower than the first articulation (7) and extend substantially symmetrically with respect to the first articulation (7) by acting with a certain lever relative to this first articulation (7).
  • the additional springs (2 AI, 21B) are essentially upright in the direction of advance (A) at work. In the example shown, they are arranged between the ramp (1) and a corresponding extension (22 A, 22B) of the chassis (4).
  • said additional springs (2 IA, 21B) are advantageously mounted so as to converge at a point (P2) (not shown) situated at a considerable distance below the surface of the ground (S).
  • These additional springs (2 IA, 21B) are advantageously traction springs. They also have great flexibility, that is to say that their characteristic is relatively flat. Their deformation in length is important because they have a low stiffness.
  • each additional spring (21A, 21B) to the corresponding extension (22A, 22B) of the frame (4) is carried out using a screw / nut system (25A, 25B). ) which allows the adjustment of said intensity.
  • This adjustment allows to modify the behavior of the ramp (1) if necessary, but is also necessary when the ramp (1) is replaced by a ramp of another length (for example when replacing a ramp of 12 meters by a ramp of 15 meters).
  • the force exerted by the additional springs (2 IA, 21B) is adjustable on the ramp (1).
  • connection points of the dampers (18A, 18B) is adjustable in order to adapt the damping to the working conditions.
  • the wings (19A, 19B) of the connecting rod (6) for this purpose also has several possible connection points for said dampers (18A, 18B). It is thus possible to act on the sensitivity of the suspension device (3) and, consequently, on the dynamic reaction of the ramp (1).
  • said agricultural implement (2) is of the sprayer type carried by a tractor.
  • the frame (4) of the agricultural implement (2) is designed to be connected to a three-point hitch of the tractor.
  • the agricultural apparatus (2) also comprises a tank (23) for containing a treatment liquid. In the light of Figure 1, we see that said tank (23) is carried by the frame (4).
  • the agricultural apparatus (2) further comprises pumping means (not shown) of the treatment liquid contained in said tank (23) to send it under pressure to said spray nozzles. Said treatment liquid is thus deposited in fine droplets on the plants or on the soil (S) to be treated.
  • Such nozzles being widely known, they have not been shown in the figures and they will not be described further.
  • the frame (4) is designed so that the ramp (1) can be moved in height relative to the ground (S).
  • the frame (4) is, in known manner, made in two parts (26, 27): a carriage (26) to which the ramp (1) is connected by means of the suspension device (3) , and a frame (27) intended to be connected to the tractor.
  • the carriage (26) can be moved in translation on the frame (27) under the action of actuator means also known but not shown: manual winch, hydraulic jack, etc.
  • the spray height can be chosen according to the working conditions, in particular to adapt it to the size of the plants to be treated.
  • the frame (4) is not subject to large oscillations and the ramp (1) is relatively stable and remains substantially parallel to the ground (S).
  • the elastic systems (14A, 14B) act with equal and opposite forces on the connecting rod (6) which is therefore substantially vertical.
  • the ramp (1) thus remains at a constant distance from the ground (S) and therefore the plants to be treated.
  • the agricultural apparatus (2) undergoes many movements and vibrations that could affect the ramp (1) in various movements likely to disturb the good distribution of the products to be spread: vertical movements that would change the height of the spreading means fixed on said ramp (1), and horizontal movements back and forth.
  • the vertical movements are the most troublesome because they modify the spreading surface of the products dispersed on the soil (S) and thus cause sometimes an underdosing, sometimes an overdosing.
  • the suspension device (3) of the invention must filter or at least greatly reduce the transmission of these harmful movements on the ramp (1).
  • the suspension device (3) comprises, for this purpose, in addition to the two dampers (18A, 18B), an additional damper (24) located between the frame (4) and the ramp (1). This additional damper (24) which damps the movements of the ramp (1) essentially around the first articulation (7).
  • FIG 3 shows the ramp (1) and the suspension device (3) when the agricultural machine (2) works on a sloping ground.
  • the ramp (1 ) automatically takes a position substantially parallel to the surface of the ground (S) and its behavior is similar to that described above if this terrain in slope also has irregularities (bumps, hollows, ruts, etc.).
  • the suspension device (3) according to the invention which has just been described, is suitable both for work on flat terrain and on sloping ground, and this regardless of the configuration of the ground surface (S ). Indeed, the ramp (1) is maintained substantially parallel to the ground (S) and the sudden oscillations that can be subjected to the frame (3) during work, are filtered and strongly attenuated, regardless of the conditions of use.
  • the invention also relates to an agricultural device for spreading products of the trailed or self-propelled type comprising a spreading ramp of products (1) according to the invention.
  • said tractor or said self-propelled vehicle is indicated by (4).
  • the agricultural implement (2) is dragged by a tractor and rolls on the ground (S) with its own rolling chassis, it is said rolling frame which is marked by (4).
  • the invention is more particularly applicable to agricultural sprayers, but can also be applied to fertilizer spreaders or the like.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Vehicle Body Suspensions (AREA)
  • Catching Or Destruction (AREA)
  • Fertilizing (AREA)
  • Soil Working Implements (AREA)
  • Agricultural Machines (AREA)

Abstract

The invention relates to a spray bar (1) for a product-spraying agricultural appliance (2) equipped with a suspension device (3) by which means the bar (1) is connected to the chassis (4) of the agricultural appliance (2), said suspension device (3) comprising: a connecting rod (6) which links the bar (1) to the chassis (4), said rod (6) being connected to the chassis (4) by means of a first articulated element (7) of an axle oriented in the direction of advancement, and to the bar (1) by means of a second articulated element (8) of an axle which is also oriented in the direction of advancement; springs (16A, 16B) which are used to act against the pivoting of the bar (1) about the second articulated element (8); and dampeners (18A, 18B) for damping the pivoting of the bar (1) about the second articulated element (8). Said bar (1) is characterised in that the suspension device (3) also comprises additional springs (21A, 21B) acting between the bar (1) and the chassis (4), and the centre of gravity (28) of the bar (1) is located essentially in the vicinity of the second articulated element (8), preferably slightly beneath the second articulated element (8). The invention also relates to a product spraying agricultural appliance (2) provided with one such bar (1).

Description

RAMPE D'EPANDAGE DE PRODUITS ET APPAREIL AGRICOLE D'EPANDAGE DE PRODUITSPRODUCT SPREADING RAMP AND AGRICULTURAL PRODUCT SPREADING APPARATUS
La présente invention se rapporte au domaine technique général de l'épandage de produits et notamment au domaine de la pulvérisation de produits de traitement du type phytosanitaires.The present invention relates to the general technical field of spreading products and in particular to the field of spraying treatment products of the phytosanitary type.
L'invention concerne une rampe d'épandage de produits (ci-après : rampe) pour un appareil agricole d'épandage de produits (ci-après : appareil agricole), équipée d'un dispositif de suspension par l'intermédiaire duquel la rampe est destinée à être liée au châssis de l'appareil agricole, ledit dispositif de suspension comportant une bielle de liaison qui relie ladite rampe audit châssis, cette bielle de liaison étant liée audit châssis par l'intermédiaire d'une première articulation d'axe dirigée dans la direction d'avance durant le travail, et à la rampe au moyen d'une deuxième articulation d'axe également dirigée dans la direction d'avance durant le travail, ledit dispositif de suspension comportant des ressorts destinés à agir à l' encontre du pivotement de la rampe autour de la deuxième articulation, et des amortisseurs destinés à amortir ledit pivotement de la rampe autour de ladite deuxième articulation.The invention relates to a product spreading ramp (hereinafter: ramp) for an agricultural product spreading device (hereinafter: agricultural implement), equipped with a suspension device through which the ramp is intended to be linked to the frame of the agricultural apparatus, said suspension device comprising a connecting rod connecting said ramp to said frame, this connecting rod being connected to said frame via a first axis joint directed in the direction of advance during the work, and at the ramp by means of a second articulation axis also directed in the direction of advance during the work, said suspension device comprising springs intended to act against the pivoting of the ramp around the second articulation, and dampers for damping said pivoting of the ramp around said second articulation.
Un tel dispositif de suspension équipant une rampe de pulvérisation est connu par le document FR 2 813 212. Ce document antérieur décrit en effet un dispositif de suspension qui comporte une bielle de liaison reliant la rampe au châssis d'un appareil agricole d'épandage de produits du type pulvérisateur agricole. Cette bielle de liaison est liée au châssis au moyen d'une première articulation d'axe dirigée dans le sens d'avance durant le travail, et à la rampe au moyen d'une deuxième articulation d'axe également dirigée dans le sens d'avance durant le travail. Ce dispositif de suspension connu comporte aussi des ressorts pour agir à l' encontre du pivotement de la rampe autour de la deuxième articulation, et des amortisseurs destinés à amortir ce mouvement de la rampe autour de cette deuxième articulation. Ces ressorts et ces amortisseurs s'étendent entre la rampe et un palonnier qui est rendu solidaire de la bielle de liaison durant le travail au moyen d'un premier vérin hydraulique. Un second vérin hydraulique est également prévu entre le châssis et la bielle de liaison, qui permet, durant le travail, soit de bloquer le pivotement de la bielle de liaison autour de la première articulation, soit d'amortir ces mouvements de pivotement.Such a suspension device fitted to a spray boom is known from document FR 2 813 212. This prior document indeed describes a suspension device which comprises a connecting rod connecting the ramp to the frame of an agricultural spreading device. products of the agricultural sprayer type. This connecting rod is connected to the chassis by means of a first articulation of axis directed in the direction of advance during the work, and to the ramp by means of a second articulation axis also directed in the direction of advance during work. This known suspension device also comprises springs for acting against the pivoting of the ramp around the second articulation, and dampers for damping this movement of the ramp around this second articulation. These springs and dampers extend between the ramp and a rudder which is secured to the connecting rod during work by means of a first hydraulic cylinder. A second hydraulic cylinder is also provided between the frame and the connecting rod, which allows, during work, either to block the pivoting of the connecting rod around the first joint, or to dampen these pivoting movements.
Avec un tel dispositif de suspension, le comportement de la rampe n'est pas optimal sur un terrain accidenté ou en pente. En effet, dans la configuration à un degré de liberté (pivotement autour de la première articulation bloqué par le second vérin hydraulique), lors d'un déplacement sur un terrain comportant beaucoup d'ornières et de bosses, l'opérateur est obligé de corriger manuellement l'orientation de la rampe avec le premier vérin hydraulique appelé à cet effet « vérin de dé vers », si l'inclinaison du terrain sous les roues du pulvérisateur agricole ou de son véhicule porteur ne correspond pas à l'inclinaison du terrain. Dans la configuration à deux degrés de liberté (pivotement possible autour de la première articulation), la rampe, sous l'effet de la gravité, ne peut pas s'orienter parallèlement à l'inclinaison du terrain lorsque le pulvérisateur agricole ou son véhicule porteur travaille dans la pente en dévers.With such a suspension device, the behavior of the ramp is not optimal on a rough terrain or slope. Indeed, in the configuration with a degree of freedom (pivoting around the first joint blocked by the second hydraulic cylinder), when moving on a terrain with many ruts and bumps, the operator is obliged to correct Manually orienting the ramp with the first hydraulic cylinder called for this purpose "die cylinder", if the inclination of the ground under the wheels of the agricultural sprayer or its carrier does not match the slope of the ground. In the configuration with two degrees of freedom (possible pivoting around the first articulation), the ramp, under the effect of gravity, can not be oriented parallel to the inclination of the ground when the agricultural sprayer or its carrier vehicle works in the sloping slope.
La présente invention a pour but d'améliorer ce dispositif de suspension connu et de proposer un dispositif de suspension qui permette d'améliorer le comportement de la rampe, notamment d'orienter celle-ci de manière appropriée, quels que soient l'état et la configuration du sol sur lequel roule l'appareil agricole ou son véhicule porteur.The object of the present invention is to improve this known suspension device and to propose a suspension device which makes it possible to improve the behavior of the ramp, in particular to orient it appropriately, whatever the state and the configuration of the ground on which the farm implement or its carrier vehicle is moving.
A cet effet, une importante caractéristique de l'invention consiste en ce que ledit dispositif de suspension comporte en sus des ressorts supplémentaires agissant entre la rampe et le châssis de l'appareil agricole et que le centre de gravité de la rampe se trouve sensiblement dans le voisinage de la deuxième articulation, de préférence quelque peu en dessous de la deuxième articulation.For this purpose, an important feature of the invention is that said suspension device further comprises additional springs acting between the ramp and the frame of the agricultural machine and that the center of gravity of the ramp is substantially in the vicinity of the second joint, preferably somewhat below the second joint.
Ces ressorts supplémentaires assurent une réorientation automatique de la rampe, quels que soient l'état et la configuration du sol sur lequel va évoluer l'appareil agricole ou son véhicule porteur et quelles que soient les conditions d'utilisation. Les oscillations résultant des ornières et bosses du terrain sont également rapidement amorties. D'autres caractéristiques et avantages de l'invention se dégageront des revendications et de la description qui va suivre d'un exemple de réalisation non limitatif de l'invention avec référence aux dessins annexés dans lesquels :These additional springs ensure automatic reorientation of the ramp, regardless of the state and configuration of the soil on which the farm vehicle or its carrier vehicle will evolve and whatever the conditions of use. The oscillations resulting from the ruts and bumps of the ground are also quickly amortized. Other characteristics and advantages of the invention will emerge from the claims and from the description which follows of a nonlimiting exemplary embodiment of the invention with reference to the appended drawings in which:
- la figure 1 représente une vue générale d'un appareil agricole équipé d'une rampe munie d'un dispositif de suspension selon l'invention,FIG. 1 represents a general view of an agricultural apparatus equipped with a ramp provided with a suspension device according to the invention,
- la figure 2 montre une vue arrière dudit dispositif de suspension et de la rampe lorsque l'appareil agricole évolue sur un terrain plat,FIG. 2 shows a rear view of said suspension device and of the ramp when the agricultural apparatus is moving on flat ground,
- la figure 3 montre une vue arrière dudit dispositif de suspension et de la rampe lorsque l'appareil agricole évolue sur un terrain en dévers. La figure 1 représente un exemple de réalisation d'une rampe (1) pour un appareil agricole (2) équipée d'un dispositif de suspension (3) conforme à l'invention. Le dispositif de suspension (3) a pour fonction de suspendre la rampe (1), au châssis (4) de l'appareil agricole (2) tel qu'un pulvérisateur par exemple, en permettant notamment l'orientation correcte de ladite rampe (1) en fonction de la configuration du terrain sur lequel évolue l'appareil agricole (2). Cette rampe (1) est notamment destinée à épandre, le plus uniformément possible, des engrais, des produits de traitement du type phytosanitaires, ou d'autres types de produits à épandre sur le sol (S) ou sur des cultures. Pour cela, l'appareil agricole (2) est déplacé durant le travail suivant une direction et un sens d'avance indiqué par la flèche (A). La rampe (1) n'est montrée que partiellement sur les figures.- Figure 3 shows a rear view of the suspension device and the ramp when the agricultural device is moving on a slope. FIG. 1 represents an exemplary embodiment of a ramp (1) for an agricultural implement (2) equipped with a suspension device (3) according to the invention. The purpose of the suspension device (3) is to suspend the ramp (1) from the frame (4) of the agricultural apparatus (2) such as a sprayer, for example by allowing the ramp ( 1) according to the configuration of the terrain on which the agricultural machine is moving (2). This ramp (1) is intended in particular to spread, as uniformly as possible, fertilizers, treatment products of the phytosanitary type, or other types of products to be spread on the soil (S) or on crops. For this, the agricultural implement (2) is moved during the work in a direction and a direction of advance indicated by the arrow (A). The ramp (1) is shown only partially in the figures.
Dans la suite de la description, les notions "avant" et "arrière", "devant" et "derrière" sont définies par rapport au sens d'avance (A) et les notions "droite" et "gauche" sont définies en regardant l'appareil agricole (2) de l'arrière dans ledit sens d'avance (A).In the remainder of the description, the notions "before" and "backward", "before" and "behind" are defined with respect to the direction of advance (A) and the notions "right" and "left" are defined by looking at the agricultural apparatus (2) from the rear in said direction of advance (A).
Lors des déplacements de l'appareil agricole (2) dans un champ, la rampe (1) est soumise à des mouvements et à des sollicitations. Le dispositif de suspension (3) a notamment pour rôle d'absorber et d'atténuer les mouvements du tracteur pour éviter leur transmission directe et intégrale à la rampe (1) de telle sorte que celle-ci puisse avoir un comportement optimal dans le champ.During movements of the agricultural apparatus (2) in a field, the ramp (1) is subjected to movements and stresses. The suspension device (3) has the particular role of absorbing and attenuating the movements of the tractor to prevent their direct and integral transmission to the ramp (1) so that it can have an optimal behavior in the field .
Comme visible sur la figure 2 notamment, le dispositif de suspension (3) comprend une bielle de liaison (6) qui relie la rampe (1) au châssis (4) de l'appareil agricole (2). La bielle de liaison (6) est liée au châssis (4) au moyen d'une première articulation (7) d'axe sensiblement horizontal et sensiblement dirigé dans la direction d'avance (A) au travail. La rampe (1), quant à elle, est liée à la bielle de liaison (6) au moyen d'une deuxième articulation (8) d'axe également sensiblement horizontal et également dirigé sensiblement dans la direction d'avance (A) au travail. Le dispositif de suspension (3) selon l'invention est ainsi du type « pendulaire ».As can be seen in FIG. 2 in particular, the suspension device (3) comprises a link rod (6) connecting the ramp (1) to the chassis (4) of the agricultural apparatus (2). The connecting rod (6) is connected to the frame (4) by means of a first articulation (7) of substantially horizontal axis and substantially directed in the direction of advance (A) at work. The ramp (1), in turn, is connected to the connecting rod (6) by means of a second articulation (8) of axis also substantially horizontal and also directed substantially in the direction of advance (A) at job. The suspension device (3) according to the invention is thus of the "pendulum" type.
D'une manière connue, ladite rampe (1) présente un tronçon central (9) avec, de part et d'autre, un bras (IA, IB) réalisé chacun en un ou plusieurs tronçons intermédiaires (10A, 10B) et un tronçon extérieur (non représenté), ces tronçons (10A, 10B) étant, de manière connue, liés respectivement les uns aux autres au moyen d'articulations. Seule une partie des tronçons intermédiaires (10A, 10B) sont représentés sur les figures 1 et 2. Les tronçons extérieurs ne sont pas représentés sur les figures. Chaque tronçon (9, 10A, 10B) est destiné à porter des moyens d'épandage tels que des buses de pulvérisation par exemple dans le cas d'un pulvérisateur agricole, pour épandre des produits sur le sol (S) ou sur les cultures. Les tronçons intermédiaires (10A, 10B) et les tronçons extérieurs sont disposés sensiblement symétriquement par rapport au plan vertical médian (11) de la rampe (1). Ainsi le centre de gravité (28) de la rampe (1) se trouve sensiblement dans le plan vertical médian (11).In known manner, said ramp (1) has a central section (9) with, on either side, an arm (IA, IB) each made of one or more intermediate sections (10A, 10B) and a section external (not shown), these sections (10A, 10B) being, in known manner, respectively connected to each other by means of joints. Only a portion of the intermediate sections (10A, 10B) are shown in Figures 1 and 2. The outer sections are not shown in the figures. Each section (9, 10A, 10B) is intended to carry spreading means such as spray nozzles for example in the case of an agricultural sprayer, for spreading products on the soil (S) or crops. The intermediate sections (10A, 10B) and the outer sections are arranged substantially symmetrically with respect to the median vertical plane (11) of the ramp (1). Thus the center of gravity (28) of the ramp (1) is substantially in the median vertical plane (11).
Lors des travaux d'épandage de produits, les bras (IA, IB) de la rampe (1) sont déployés de manière à couvrir une large bande de terrain : la rampe (1) s'étend ainsi transversalement à la direction d'avance (A) au travail et sensiblement parallèlement au sol (S). Pour le transport, les bras (IA, IB) sont repliés de manière connue de sorte à réduire l'encombrement de la rampe (1) et notamment à respecter le gabarit autorisé pour circuler sur la voie publique. Le tronçon extérieur et le(les) tronçon(s) intermédiaire(s) (10A, 10B) de chaque bras (IA, IB) de la rampe (1) sont repliés sensiblement à la verticale, respectivement dépliés sensiblement à l'horizontal, par l'intermédiaire d'un actionneur (13A, 13B) et d'un système élastique (14A, 14B) respectifs, autour des articulations les liant les uns aux autres. Les actionneurs (13 A, 13B) sont par exemple des vérins hydrauliques. Chaque actionneur (13 A, 13B) s'étend entre le tronçon central (9) et le tronçon intermédiaire (10A, 10B) adjacent respectif. Le tronçon extérieur correspondant et, le cas échéant, le(s) tronçon(s) intermédiaire(s) (10A, 10B) supplémentaire(s) sont, quant à eux, repliés, respectivement dépliés grâce au système élastique (14A, 14B) correspondant. Chaque système élastique (14A, 14B) comprend à cet effet un organe de traction (15 A, 15B) relié à un ressort de traction (16A, 16B). Le ressort (16A, 16B) est lié, à l'une de ses extrémités, à la bielle de liaison (6) en un point d'accrochage (17A, 17B) correspondant. A son autre extrémité, ledit ressort (16A, 16B) est lié à un bras (IA, IB) correspondant de la rampe (1). Le ressort (16A, 16B) est lié à l'organe de traction (15 A, 15B) correspondant qui agit, lui, sur le(s) tronçon(s) intermédiaire(s) (10A, 10B) supplémentaire(s) et le tronçon extérieur respectifs. La première fonction des ressorts (16A, 16B) est d'assurer le dépliage et le repliage de ce (ces) tronçon(s) intermédiaire(s) (10A, 10B) supplémentaire(s) et du tronçon extérieur respectifs. L'organe de traction (15A, 15B) est de préférence un câble.During the spreading of products, the arms (IA, IB) of the ramp (1) are deployed so as to cover a wide band of terrain: the ramp (1) thus extends transversely to the direction of advance (A) at work and substantially parallel to the ground (S). For transport, the arms (IA, IB) are folded in a known manner so as to reduce the size of the ramp (1) and in particular to respect the size allowed to circulate on public roads. The outer section and the intermediate section (s) (10A, 10B) of each arm (IA, IB) of the ramp (1) are folded substantially vertically, respectively unfolded substantially horizontally, via a respective actuator (13A, 13B) and a resilient system (14A, 14B) around the hinges connecting them to one another. The actuators (13A, 13B) are for example hydraulic cylinders. Each actuator (13A, 13B) extends between the central section (9) and the respective adjacent intermediate section (10A, 10B). The corresponding outer section and, where appropriate, the additional intermediate section (s) (10A, 10B) are, for their part, folded, respectively unfolded thanks to the elastic system (14A, 14B). corresponding. Each elastic system (14A, 14B) comprises for this purpose a traction member (15A, 15B) connected to a tension spring (16A, 16B). The spring (16A, 16B) is connected at one of its ends to the connecting rod (6) at a corresponding attachment point (17A, 17B). At its other end, said spring (16A, 16B) is connected to a corresponding arm (IA, IB) of the ramp (1). The spring (16A, 16B) is connected to the corresponding traction member (15A, 15B) acting on the additional intermediate section (s) (10A, 10B) and the respective outer section. The first function of the springs (16A, 16B) is to unfold and refold this (these) intermediate section (s) (10A, 10B) additional (s) and the respective outer section. The traction member (15A, 15B) is preferably a cable.
La tendance est d'utiliser des appareils agricoles (2) présentant une largeur de travail de plus en plus grande et de travailler à des vitesses toujours plus élevées. Plus on évolue vite, plus les risques sont grands de déformer ou de casser des pièces dudit appareil agricole (2) sous l'effet des contraintes élevées qui peuvent alors être engendrées. L'accroissement des vitesses de travail et des dimensions des rampes (1) impose une construction solide et un dispositif de suspension (3) adéquat. Le dispositif de suspension (3) de la rampe (1) d'un appareil agricole (2) est donc un composant primordial pour garantir une bonne répartition du produit à épandre et pour prévenir toute détérioration qui engendrerait des pertes de temps et des frais d'entretien et de réparation qui pourraient être élevés.The tendency is to use agricultural implements (2) with an increasing working width and to work at ever higher speeds. The faster we move, the greater the risk of deforming or breaking parts of the agricultural machine (2) under the effect of high stresses that can then be generated. The increase of the working speeds and the dimensions of the ramps (1) imposes a solid construction and an adequate suspension device (3). The suspension device (3) of the ramp (1) of an agricultural implement (2) is therefore an essential component to ensure a good distribution of the product to be spread and to prevent deterioration which would cause wastes of time and costs. maintenance and repair that could be high.
Pour maintenir la rampe (1) sensiblement parallèle au sol, le dispositif de suspension (3) utilise les systèmes élastiques (14A, 14B), et notamment leurs ressorts (16A, 16B), qui ont pour deuxième fonction d'agir à l' encontre du pivotement de la rampe (1) autour de la deuxième articulation (8) en absorbant et restituant l'énergie qui donne un mouvement oscillatoire à la rampe (1). Le dispositif de suspension (3) comprend également des amortisseurs (18A, 18B) qui s'étendent entre le tronçon central (9) et la bielle de liaison (6) et qui permettent d'amortir les mouvements de la rampe (1) autour de la deuxième articulation (8). Les amortisseurs (18A, 18B) diminuent la durée des oscillations en freinant l'amplitude de ces oscillations, ils dissipent l'énergie. Les amortisseurs (18A, 18B) suppriment le mouvement d'oscillation donné par les ressorts (16A, 16B).To maintain the ramp (1) substantially parallel to the ground, the suspension device (3) uses the elastic systems (14A, 14B), and in particular their springs (16A, 16B), whose second function is to act on the against the pivoting of the ramp (1) around the second articulation (8) by absorbing and restoring the energy which gives an oscillatory movement to the ramp (1). The suspension device (3) also comprises dampers (18A, 18B) which extend between the central section (9) and the connecting rod (6) and which make it possible to dampen the movements of the ramp (1) around of the second articulation (8). The dampers (18A, 18B) reduce the duration of the oscillations by braking the amplitude of these oscillations, they dissipate the energy. The dampers (18A, 18B) suppress the oscillation movement given by the springs (16A, 16B).
Comme dit plus haut, chaque ressort (16A, 16B) est accroché sur la bielle de liaison (6) au moyen d'un point d'accrochage (17A, 17B). Ce point d'accrochage (17A, 17B) se situe de préférence au voisinage de la deuxième articulation (8) et sensiblement dans le voisinage du plan vertical médian de la bielle de liaison (6), sans toutefois coïncider avec ladite deuxième articulation (8) de sorte que les ressorts (16A, 16B) agissent avec un certain bras de levier sur ladite deuxième articulation (8). Les ressorts (16A, 16B) s'étendent avantageusement sensiblement horizontalement et sensiblement perpendiculairement à la direction d'avance (A). Les ressorts (16A, 16B) sont avantageusement positionnés pour que leur ligne d'action respective passe près de la deuxième articulation (8). Ces ressorts (16A, 16B) agissent avec des forces sensiblement égales et opposées sur la bielle de liaison (6). La position des ressorts (16A, 16B) est symétrique par rapport au plan vertical médian (11) de la rampe (1). Ils permettent le recentrage automatique de la rampe (1) par rapport à la deuxième articulation (8) puisqu'ils agissent à l'encontre du pivotement de la rampe (1) autour de ladite deuxième articulation (8). Ces ressorts (16A, 16B) sont relativement raides, car ils doivent aussi tirer sur le(s) tronçon(s) intermédiaire(s) (10) supplémentaire(s) et le tronçon extérieur correspondants pour les rigidifier durant le travail. Ainsi, il en découle que le degré de liberté, en pivotement, de la rampe (1) autour de la deuxième articulation (8) est avantageusement relativement limité, les ressorts (16A, 16B) autorisent des déplacements de petite amplitude. Comme dit plus haut, les amortisseurs (18 A, 18B) sont disposés entre la rampe (1), et plus particulièrement le tronçon central (9) de celle-ci, et la bielle de liaison (6). A cet effet, la bielle de liaison (6) comporte, de part et d'autre, de son plan médian une aile (19A, 19B) à l'extrémité de laquelle est accrochée l'amortisseur (18 A, 18B) correspondant. Ledit plan médian de la bielle de liaison (6) étant sensiblement confondu avec le plan médian (11) de la rampe (1), lorsque l'appareil agricole (2) se trouve sur un terrain horizontal. Les deux ailes (19A, 19B) sont symétriques. De cette sorte, les amortisseurs (18 A, 18B) sont implantés sensiblement symétriquement par rapport au plan médian (11) de la rampe (1). En sus, ils sont implantés de sorte à converger vers le haut en un point (Pl) situé à une certaine distance au-dessus de la deuxième articulation (8), de préférence même au-dessus de la première articulation (7). Les ailes (19A, 19B) sont légèrement inclinées vers le haut de manière à ce que leur point de convergence soit sensiblement disposé dans ledit plan médian de la bielle de liaison (6). Chaque aile (19A, 19B) est destinée à glisser sur une partie (4A, 4B) du châssis (4) avec un certain frottement durant le pivotement de ladite bielle de liaison (6) autour de la première articulation (7). Les mouvements de pivotement autour de la première articulation (7) sont, quant à eux, amortis par frottement de la bielle de liaison (6) sur le châssis (4). A cet effet, l'extrémité de chaque aile (19A, 19B), qui est en contact avec le châssis (4), est équipé de patins de frottement (2OA, 20B) via lesquels ladite aile (19A, 19B) frotte sur la partie (4 A, 4B) correspondante du châssis (4). Le pivotement autour de la première articulation (7) est ainsi amorti par le dispositif amortisseur (19A-4A, 19B-4B). Ce dispositif amortisseur (19A-4A, 19B-4B) agit entre la bielle de liaison (6) et le châssis (4).As mentioned above, each spring (16A, 16B) is hooked on the connecting rod (6) by means of a hooking point (17A, 17B). This attachment point (17A, 17B) is preferably in the vicinity of the second articulation (8) and substantially in the vicinity of the median vertical plane of the connecting rod (6), but does not coincide with said second articulation (8). ) so that the springs (16A, 16B) act with a certain lever arm on said second hinge (8). The springs (16A, 16B) advantageously extend substantially horizontally and substantially perpendicular to the direction of advance (A). The springs (16A, 16B) are advantageously positioned so that their respective line of action passes near the second articulation (8). These springs (16A, 16B) act with substantially equal and opposite forces on the connecting rod (6). The position of the springs (16A, 16B) is symmetrical with respect to the median vertical plane (11) of the ramp (1). They allow the automatic refocusing of the ramp (1) relative to the second articulation (8) since they act against the pivoting of the ramp (1) around said second articulation (8). These springs (16A, 16B) are relatively stiff, because they must also pull on the intermediate section (s) (10) additional (s) and the corresponding outer section to stiffen during work. Thus, it follows that the degree of freedom, in pivoting, of the ramp (1) around the second articulation (8) is advantageously relatively limited, the springs (16A, 16B) allow displacements of small amplitude. As stated above, the dampers (18A, 18B) are arranged between the ramp (1), and more particularly the central section (9) thereof, and the connecting rod (6). For this purpose, the connecting rod (6) comprises, on both sides, of its median plane a wing (19A, 19B) at the end of which is attached the shock absorber (18A, 18B) corresponding. Said median plane of the connecting rod (6) being substantially coincident with the median plane (11) of the ramp (1), when the agricultural machine (2) is on a horizontal ground. The two wings (19A, 19B) are symmetrical. In this way, the dampers (18A, 18B) are located substantially symmetrically with respect to the median plane (11) of the ramp (1). In addition, they are implanted so as to converge upwardly at a point (P1) located at a distance above the second articulation (8), preferably even above the first articulation (7). The wings (19A, 19B) are slightly inclined upwards so that their point of convergence is substantially disposed in said median plane of the connecting rod (6). Each wing (19A, 19B) is intended to slide on a portion (4A, 4B) of the frame (4) with a certain friction during the pivoting of said connecting rod (6) around the first articulation (7). The pivoting movements around the first articulation (7) are, in turn, dampened by friction of the connecting rod (6) on the frame (4). For this purpose, the end of each wing (19A, 19B), which is in contact with the frame (4), is equipped with friction pads (20A, 20B) via which said wing (19A, 19B) rubs on the corresponding part (4 A, 4B) of the frame (4). The pivoting around the first articulation (7) is thus damped by the damping device (19A-4A, 19B-4B). This damping device (19A-4A, 19B-4B) acts between the connecting rod (6) and the frame (4).
Selon une importante caractéristique de l'invention, le dispositif de suspension (3) comporte également des ressorts supplémentaires (21A, 21B) agissant entre la rampe (1) et le châssis (4). Les ressorts supplémentaires (21A, 21B) s'étendent sensiblement symétriquement de part et d'autre du plan médian (11) de ladite rampe (1). A la lumière des figures, un ressort supplémentaire (21A, 21B) s'étend de chaque côté dudit plan médian (11). Les ressorts supplémentaires (2 IA, 21B) sont au nombre de deux. Les ressorts (16A, 16B) s'étendent également sensiblement symétriquement de part et d'autre du plan vertical médian (11). Chaque ressort (16A, 16B) est relié à l'un des bras (IA, IB) respectif de la rampe (1). Le centre de gravité (28) de la rampe (1) est disposé sensiblement sur le plan vertical médian (11). En outre, il se trouve sensiblement dans le voisinage de la deuxième articulation (8) et de préférence quelque peu en dessous de cette dernière.According to an important characteristic of the invention, the suspension device (3) also comprises additional springs (21A, 21B) acting between the ramp (1) and the chassis (4). The additional springs (21A, 21B) extend substantially symmetrically on either side of the median plane (11) of said ramp (1). In the light of the figures, an additional spring (21A, 21B) extends on each side of said median plane (11). The additional springs (2 IA, 21B) are two in number. The springs (16A, 16B) also extend substantially symmetrically on either side of the median vertical plane (11). Each spring (16A, 16B) is connected to one of the respective arms (IA, IB) of the ramp (1). The center of gravity (28) of the ramp (1) is disposed substantially on the median vertical plane (11). In addition, it is substantially in the vicinity of the second articulation (8) and preferably somewhat below the latter.
Par la présence de ces ressorts supplémentaires (2 IA, 21B), on améliore le comportement pendulaire de la rampe (1) qui s'oriente ainsi plus rapidement dans la pente et qui est encore mieux isolée des mouvements d'oscillations du tracteur, et ceci quelle que soit la configuration du sol (S) sur lequel évolue l'appareil agricole (2) et quelles que soient les conditions d'utilisation de celui-ci. On obtient ainsi un parallélisme sensiblement constant de la rampe (1) par rapport au sol (S), quelles que soient la configuration du terrain et la vitesse d'avancement. Pendant les travaux d'épandage, l'opérateur peut ainsi parcourir les terrains en dévers dans tous les sens sans intervenir sur le réglage de l'attitude de la rampe (1), même si ces terrains présentent de profondes ornières.By the presence of these additional springs (2 IA, 21B), it improves the pendulum behavior of the ramp (1) which is thus oriented more quickly in the slope and which is even better isolated from the movements of oscillations of the tractor, and this whatever the configuration of the soil (S) on which the agricultural apparatus (2) evolves and whatever the conditions of use thereof. This results in a substantially constant parallelism of the ramp (1) relative to the ground (S), regardless of the terrain configuration and the speed of travel. During the spreading work, the operator can browse the land in slopes in all directions without intervening on the adjustment of the attitude of the ramp (1), even if these lands have deep ruts.
Les ressorts supplémentaires (2 IA, 21B) sont avantageusement disposés plus bas que la première articulation (7) et s'étendent sensiblement symétriquement par rapport à la première articulation (7) en agissant avec un certain bras de levier par rapport à cette première articulation (7). Les ressorts supplémentaires (2 IA, 21B) sont essentiellement debout en vue suivant la direction d'avance (A) au travail. Dans l'exemple représenté, ils sont disposés entre la rampe (1) et une extension (22 A, 22B) correspondante du châssis (4). En fait, lesdits ressorts supplémentaires (2 IA, 21B) sont avantageusement montés de manière à converger en un point (P2) (non représenté) situé à une importante distance en dessous de la surface du sol (S). Ces ressorts supplémentaires (2 IA, 21B) sont avantageusement des ressorts de traction. Ils présentent en outre une grande souplesse, c'est-à-dire que leur caractéristique est relativement plate. Leur déformation en longueur est importante car ils présentent une faible raideur.The additional springs (2 IA, 21B) are advantageously arranged lower than the first articulation (7) and extend substantially symmetrically with respect to the first articulation (7) by acting with a certain lever relative to this first articulation (7). The additional springs (2 AI, 21B) are essentially upright in the direction of advance (A) at work. In the example shown, they are arranged between the ramp (1) and a corresponding extension (22 A, 22B) of the chassis (4). In fact, said additional springs (2 IA, 21B) are advantageously mounted so as to converge at a point (P2) (not shown) situated at a considerable distance below the surface of the ground (S). These additional springs (2 IA, 21B) are advantageously traction springs. They also have great flexibility, that is to say that their characteristic is relatively flat. Their deformation in length is important because they have a low stiffness.
Il est également prévu que l'utilisateur puisse modifier l'intensité de l'action de ces ressorts supplémentaires (2 IA, 21B) sur la rampe (1). Pour cela, il est prévu que la liaison entre chaque ressort supplémentaire (21A, 21B) à l'extension (22A, 22B) correspondant du châssis (4) soit réalisée à l'aide d'un système vis/écrou (25A, 25B) qui permet le réglage de ladite intensité. Ce réglage permet de modifier le comportement de la rampe (1) si nécessaire, mais est aussi nécessaire lorsque l'on remplace la rampe (1) par une rampe d'une autre longueur (par exemple lors du remplacement d'une rampe de 12 mètres par une rampe de 15 mètres). La force exercée par les ressorts supplémentaires (2 IA, 21B) est réglable sur la rampe (1).It is also expected that the user can change the intensity of the action of these additional springs (2 IA, 21B) on the ramp (1). For this, it is provided that the connection between each additional spring (21A, 21B) to the corresponding extension (22A, 22B) of the frame (4) is carried out using a screw / nut system (25A, 25B). ) which allows the adjustment of said intensity. This adjustment allows to modify the behavior of the ramp (1) if necessary, but is also necessary when the ramp (1) is replaced by a ramp of another length (for example when replacing a ramp of 12 meters by a ramp of 15 meters). The force exerted by the additional springs (2 IA, 21B) is adjustable on the ramp (1).
Il est aussi intéressant de pouvoir régler l'intensité de l'action des ressorts (16A, 16B). Ce réglage est réalisé en déplaçant le point d'accrochage (17A, 17B) de chaque ressort (16A, 16B)) sur la bielle de liaison (6). Cette dernière présente à cet effet plusieurs points d'accrochage possibles. Une variante possible serait de prévoir les points d'accrochage (17A, 17B) sur une pièce susceptible d'être translatée sur ladite bielle de liaison (6). Ainsi la distance entre le point d'accrochage (17A, 17B) de chaque ressort (16A, 16B) et la deuxième articulation (8) est réglable. Un tel réglage permet d'adapter le dispositif de suspension (3) en fonction du terrain, en présence de beaucoup d'ornières et de bosses, le point d'accrochage (17A, 17B) sera proche de la deuxième articulation (8). Il peut également être avantageusement prévu que la position des points de liaison des amortisseurs (18A, 18B) soit réglable afin d'adapter l'amortissement aux conditions de travail. Les ailes (19A, 19B) de la bielle de liaison (6) présente à cet effet également plusieurs points de liaison possibles pour lesdits amortisseurs (18 A, 18B). On peut ainsi agir sur la sensibilité du dispositif de suspension (3) et, par conséquent, sur la réaction dynamique de la rampe (1).It is also interesting to be able to adjust the intensity of the action of the springs (16A, 16B). This adjustment is made by moving the attachment point (17A, 17B) of each spring (16A, 16B)) on the connecting rod (6). The latter has for this purpose several possible attachment points. A possible variant would be to provide the attachment points (17A, 17B) on a part that can be translated on said connecting rod (6). Thus the distance between the attachment point (17A, 17B) of each spring (16A, 16B) and the second articulation (8) is adjustable. Such an adjustment makes it possible to adapt the suspension device (3) according to the terrain, in the presence of a lot of ruts and bumps, the point of attachment (17A, 17B) will be close to the second articulation (8). It can also be advantageously provided that the position of the connection points of the dampers (18A, 18B) is adjustable in order to adapt the damping to the working conditions. The wings (19A, 19B) of the connecting rod (6) for this purpose also has several possible connection points for said dampers (18A, 18B). It is thus possible to act on the sensitivity of the suspension device (3) and, consequently, on the dynamic reaction of the ramp (1).
Dans l'exemple de réalisation représenté, ledit appareil agricole (2) est du type pulvérisateur porté par un tracteur. Ainsi, l'intégralité du poids dudit appareil agricole (2) est portée par le tracteur. Le châssis (4) de l'appareil agricole (2) est réalisé de manière à être lié à un attelage trois points du tracteur. L'appareil agricole (2) comporte également une cuve (23) destinée à contenir un liquide de traitement. A la lumière de la figure 1, on voit que ladite cuve (23) est portée par le châssis (4). D'une manière connue, l'appareil agricole (2) comporte encore des moyens de pompage (non représentés) du liquide de traitement contenu dans ladite cuve (23) pour l'envoyer sous pression jusqu'auxdites buses de pulvérisation. Ledit liquide de traitement est ainsi déposé en fines gouttelettes sur les plantes ou sur le sol (S) à traiter. De telles buses étant largement connues, elles n'ont pas été représentées sur les figures et elles ne seront pas décrites davantage.In the exemplary embodiment shown, said agricultural implement (2) is of the sprayer type carried by a tractor. Thus, the entire weight of said agricultural machine (2) is carried by the tractor. The frame (4) of the agricultural implement (2) is designed to be connected to a three-point hitch of the tractor. The agricultural apparatus (2) also comprises a tank (23) for containing a treatment liquid. In the light of Figure 1, we see that said tank (23) is carried by the frame (4). In a known manner, the agricultural apparatus (2) further comprises pumping means (not shown) of the treatment liquid contained in said tank (23) to send it under pressure to said spray nozzles. Said treatment liquid is thus deposited in fine droplets on the plants or on the soil (S) to be treated. Such nozzles being widely known, they have not been shown in the figures and they will not be described further.
D'une manière également connue, le châssis (4) est réalisé de sorte que la rampe (1) puisse être déplacée en hauteur par rapport au sol (S). Dans l'exemple de réalisation, le châssis (4) est, de manière connue, réalisé en deux parties (26, 27) : un chariot (26) auquel est liée la rampe (1) au moyen du dispositif de suspension (3), et un bâti (27) destiné à être lié au tracteur. Le chariot (26) peut être déplacé en translation sur le bâti (27) sous l'action de moyens actionneurs également connus mais non représentés : treuil manuel, vérin hydraulique, etc. Ainsi, la hauteur de pulvérisation peut être choisie en fonction des conditions de travail, notamment pour l'adapter à la taille des plantes à traiter.In a manner also known, the frame (4) is designed so that the ramp (1) can be moved in height relative to the ground (S). In the exemplary embodiment, the frame (4) is, in known manner, made in two parts (26, 27): a carriage (26) to which the ramp (1) is connected by means of the suspension device (3) , and a frame (27) intended to be connected to the tractor. The carriage (26) can be moved in translation on the frame (27) under the action of actuator means also known but not shown: manual winch, hydraulic jack, etc. Thus, the spray height can be chosen according to the working conditions, in particular to adapt it to the size of the plants to be treated.
Si l'appareil agricole (2) se déplace sur un terrain plat et peu accidenté comme représenté sur la figure 2, le châssis (4) n'est pas soumis à de grands mouvements d'oscillations et la rampe (1) est relativement stable et reste sensiblement parallèle au sol (S). Les systèmes élastiques (14A, 14B) agissent avec des forces égales et opposées sur la bielle de liaison (6) qui est donc sensiblement verticale. Les ressorts supplémentaires (2 IA, 21B), quant à eux, agissent également avec des forces égales et opposées sur la rampe (1). La rampe (1) reste ainsi à une distance constante du sol (S) et donc des plantes à traiter.If the agricultural machine (2) moves on a flat and slightly uneven ground as shown in Figure 2, the frame (4) is not subject to large oscillations and the ramp (1) is relatively stable and remains substantially parallel to the ground (S). The elastic systems (14A, 14B) act with equal and opposite forces on the connecting rod (6) which is therefore substantially vertical. The additional springs (2 IA, 21B), meanwhile, also act with equal and opposite forces on the ramp (1). The ramp (1) thus remains at a constant distance from the ground (S) and therefore the plants to be treated.
Mais, en général, durant les travaux d'épandage, l'appareil agricole (2) subit de nombreux mouvements et vibrations qui pourraient se répercuter sur la rampe (1) en mouvements divers susceptibles de perturber la bonne répartition des produits à épandre : des mouvements verticaux qui modifieraient la hauteur des moyens d'épandage fixés sur ladite rampe (1), et des mouvements horizontaux d'avant en arrière. Les mouvements verticaux sont les plus gênants, car ils modifient la surface d'épandage des produits dispersés sur le sol (S) et entraînent ainsi tantôt un sous-dosage, tantôt un sur-dosage.But, in general, during the spreading operations, the agricultural apparatus (2) undergoes many movements and vibrations that could affect the ramp (1) in various movements likely to disturb the good distribution of the products to be spread: vertical movements that would change the height of the spreading means fixed on said ramp (1), and horizontal movements back and forth. The vertical movements are the most troublesome because they modify the spreading surface of the products dispersed on the soil (S) and thus cause sometimes an underdosing, sometimes an overdosing.
Le dispositif de suspension (3) de l'invention doit filtrer ou du moins fortement atténuer la transmission de ces mouvements néfastes sur la rampe (1). Lors des déplacements de l'appareil agricole (2) dans les champs pour épandre un produit, sa rampe (1) est presque toujours soumise à une combinaison des deux mouvements décrits ci-dessus. Lors des déplacements à des vitesses élevées, ces mouvements sont encore accentués. Le dispositif de suspension (3) comporte, à cet effet, outre les deux amortisseurs (18A, 18B), un amortisseur (24) supplémentaire implanté entre le châssis (4) et la rampe (1). Cet amortisseur supplémentaire (24) qui permet d'amortir les mouvements de la rampe (1) essentiellement autour de la première articulation (7).The suspension device (3) of the invention must filter or at least greatly reduce the transmission of these harmful movements on the ramp (1). When the agricultural apparatus (2) moves in the fields to spread a product, its ramp (1) is almost always subjected to a combination of two movements described above. When traveling at high speeds, these movements are accentuated. The suspension device (3) comprises, for this purpose, in addition to the two dampers (18A, 18B), an additional damper (24) located between the frame (4) and the ramp (1). This additional damper (24) which damps the movements of the ramp (1) essentially around the first articulation (7).
Lorsque l'appareil agricole (2) est amené à travailler sur un sol irrégulier et/ou accidenté, ce sont les roues (5) du tracteur qui rencontrent les irrégularités (bosses, trous, ornières, etc.) que présente le terrain. Le déplacement vertical brutal de l'une desdites roues (5) (vers le bas lorsque la roue (5) tombe dans un creux, ou vers le haut lorsque la roue passe sur une bosse) provoque un déplacement brutal et latéral du châssis (4). Ce déplacement vertical se traduit aussi par un déplacement brutal et latéral de la première articulation (6). Mais, grâce à la suspension pendulaire, aux divers ressorts (16A, 16B, 2 IA, 21B) et aux divers amortisseurs (18 A, 18B, 19A-4A, 19B-4B, 24), la rampe (1) qui perd momentanément quelque peu son horizontalité, retourne relativement rapidement dans sa position parallèle au sol (S).When the agricultural implement (2) is made to work on uneven and / or uneven ground, it is the wheels (5) of the tractor that encounter the irregularities (bumps, holes, ruts, etc.) that the field. The sudden vertical displacement of one of said wheels (5) (downwards when the wheel (5) falls into a hollow, or upwards when the wheel passes over a hump) causes a sudden and lateral displacement of the chassis (4). ). This vertical displacement also results in a sudden and lateral displacement of the first articulation (6). But, thanks to the pendulum suspension, the various springs (16A, 16B, 2 IA, 21B) and the various dampers (18A, 18B, 19A-4A, 19B-4B, 24), the ramp (1) which momentarily loses somewhat horizontally, returns relatively quickly to its position parallel to the ground (S).
La figure 3 représente la rampe (1) et le dispositif de suspension (3) lorsque l'appareil agricole (2) travaille sur un terrain en pente. Là aussi, sous l'effet conjugué de la suspension pendulaire, des divers ressorts (16A, 16B, 2 IA, 21B) et des divers amortisseurs (18A, 18B, 19A-4A, 19B-4B, 24), la rampe (1) prend automatiquement une position sensiblement parallèle à la surface du sol (S) et son comportement est similaire à celui décrit plus haut si ce terrain en dévers comporte en sus des irrégularités (bosses, creux, ornières, etc.). Le dispositif de suspension (3) selon l'invention qui vient d'être décrit, est adapté aussi bien pour les travaux sur un terrain plat que sur un terrain en dévers, et ceci quelle que soit la configuration de la surface du sol (S). En effet, la rampe (1) est maintenue sensiblement parallèle au sol (S) et les oscillations brusques auxquelles peut être soumis le châssis (3) durant le travail, sont filtrées et fortement atténuées, quelles que soient les conditions d'utilisation.Figure 3 shows the ramp (1) and the suspension device (3) when the agricultural machine (2) works on a sloping ground. Again, under the combined effect of the pendulum suspension, the various springs (16A, 16B, 2 IA, 21B) and the various dampers (18A, 18B, 19A-4A, 19B-4B, 24), the ramp (1 ) automatically takes a position substantially parallel to the surface of the ground (S) and its behavior is similar to that described above if this terrain in slope also has irregularities (bumps, hollows, ruts, etc.). The suspension device (3) according to the invention which has just been described, is suitable both for work on flat terrain and on sloping ground, and this regardless of the configuration of the ground surface (S ). Indeed, the ramp (1) is maintained substantially parallel to the ground (S) and the sudden oscillations that can be subjected to the frame (3) during work, are filtered and strongly attenuated, regardless of the conditions of use.
L'invention concerne également un appareil agricole d'épandage de produits du type traîné ou automoteur comportant une rampe d'épandage de produits (1) conforme à l'invention. Dans le cas où l'appareil agricole (2) est porté par un tracteur ou est du type automoteur, ledit tracteur ou ledit automoteur est repéré par (4). Dans le cas où l'appareil agricole (2) est traîné par un tracteur et roule sur le sol (S) à l'aide de son propre châssis roulant, c'est ledit châssis roulant qui est repéré par (4).The invention also relates to an agricultural device for spreading products of the trailed or self-propelled type comprising a spreading ramp of products (1) according to the invention. In the case where the agricultural apparatus (2) is carried by a tractor or is of the self-propelled type, said tractor or said self-propelled vehicle is indicated by (4). In the case where the agricultural implement (2) is dragged by a tractor and rolls on the ground (S) with its own rolling chassis, it is said rolling frame which is marked by (4).
L'invention s'applique plus particulièrement aux pulvérisateurs agricoles, mais peut également s'appliquer aux épandeurs d'engrais ou autres.The invention is more particularly applicable to agricultural sprayers, but can also be applied to fertilizer spreaders or the like.
Il est bien évident que l'invention n'est pas limitée au mode de réalisation décrit ci-dessus et représenté sur les dessins annexés. Des modifications restent possibles, notamment en ce qui concerne la constitution ou le nombre des divers éléments ou par substitution d'équivalents techniques, sans pour autant sortir du domaine de protection tel qu'il est défini par les revendications suivantes. It is obvious that the invention is not limited to the embodiment described above and shown in the accompanying drawings. Modifications remain possible, in particular as regards the constitution or the number of the various elements or by substitution of technical equivalents, without departing from the scope of protection as defined by the following claims.

Claims

REVENDICATIONS
1- Rampe d'épandage de produits (1) pour un appareil agricole d'épandage de produits (2) équipée d'un dispositif de suspension (3) par l'intermédiaire duquel la rampe (1) est destinée à être liée au châssis (4) de l'appareil agricole (2), ledit dispositif de suspension (3) comportant :A product spreading ramp (1) for an agricultural product spreader (2) equipped with a suspension device (3) through which the ramp (1) is intended to be linked to the frame (4) of the agricultural apparatus (2), said suspension device (3) comprising:
- une bielle de liaison (6) qui relie ladite rampe (1) audit châssis (4), cette bielle de liaison (6) étant liée audit châssis (4) par l'intermédiaire d'une première articulation (7) d'axe dirigée dans la direction d'avance (A) durant le travail, et à la rampe (1) au moyen d'une deuxième articulation- a link rod (6) which connects said ramp (1) to said frame (4), this connecting rod (6) being connected to said frame (4) via a first articulation (7) of axis directed in the direction of advance (A) during work, and at the ramp (1) by means of a second articulation
(8) d'axe également dirigée dans la direction d'avance (A) durant le travail,(8) with axis also directed in the direction of advance (A) during the work,
- des ressorts (16A, 16B) destinés à agir à l' encontre du pivotement de la rampe (1) autour de ladite deuxième articulation (8), et - des amortisseurs (18 A, 18B) destinés à amortir ledit pivotement de la rampe (1) autour de ladite deuxième articulation (8), caractérisée en ce que ledit dispositif de suspension (3) comporte en sus des ressorts supplémentaires (2 IA, 21B) agissant entre la rampe (1) et le châssis (4) et que le centre de gravité (28) de la rampe (1) se trouve sensiblement dans le voisinage de ladite deuxième articulation (8), et de préférence quelque peu en dessous de ladite deuxième articulation (8).- springs (16A, 16B) intended to act against the pivoting of the ramp (1) around said second articulation (8), and - dampers (18A, 18B) for damping said pivoting of the ramp (1) around said second articulation (8), characterized in that said suspension device (3) additionally comprises additional springs (2 IA, 21B) acting between the ramp (1) and the chassis (4) and that the center of gravity (28) of the ramp (1) is substantially in the vicinity of said second articulation (8), and preferably somewhat below said second articulation (8).
- Rampe selon la revendication 1, caractérisée en ce que les ressorts supplémentaires (2 IA, 21B) sont disposés sensiblement symétriquement par rapport à la première articulation (7) et agissent avec un certain bras de levier par rapport à cette première articulation (7).- Ramp according to claim 1, characterized in that the additional springs (2 IA, 21B) are disposed substantially symmetrically with respect to the first articulation (7) and act with a certain lever arm relative to this first articulation (7) .
- Rampe selon la revendication 1 ou 2, caractérisée en ce que les ressorts supplémentaires (2 IA, 21B) sont essentiellement debout en vue suivant la direction d'avance (A) au travail. 4- Rampe selon la revendication 3, caractérisée en ce que les ressorts supplémentaires (2 IA, 21B) sont montés de manière à converger en un point (P2) situé à une importante distance en dessous de la surface du sol (S).- Ramp according to claim 1 or 2, characterized in that the additional springs (2 IA, 21B) are essentially standing in view in the direction of advance (A) at work. 4. Ramp according to claim 3, characterized in that the additional springs (2 IA, 21B) are mounted so as to converge at a point (P2) located at a considerable distance below the surface of the ground (S).
5- Rampe selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les ressorts supplémentaires (2 IA, 21B) présentent une caractéristique relativement plate (déformation importante en longueur).5- ramp according to any one of claims 1 to 4, characterized in that the additional springs (2 IA, 21B) have a relatively flat characteristic (large deformation in length).
6- Rampe selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la force exercée par les ressorts supplémentaires (2 IA, 21B) est réglable.6. Ramp according to any one of claims 1 to 5, characterized in that the force exerted by the additional springs (2 IA, 21B) is adjustable.
7- Rampe selon l'une quelconque des revendications 1 à 6, caractérisée en ce que les ressorts supplémentaires (2 IA, 21B) sont au nombre de deux.7- ramp according to any one of claims 1 to 6, characterized in that the additional springs (2 IA, 21B) are two in number.
8- Rampe selon l'une quelconque des revendications 1 à 7, caractérisée en ce que le pivotement de la rampe (1) autour de la première articulation (7) est amorti par un dispositif amortisseur (19A-4A, 19B-4B).8- ramp according to any one of claims 1 to 7, characterized in that the pivoting of the ramp (1) around the first joint (7) is damped by a damping device (19A-4A, 19B-4B).
9- Rampe selon la revendication 8, caractérisée en ce que ledit dispositif amortisseur (19A-4A, 19B-4B) agit entre la bielle de liaison (6) et le châssis (4).9- ramp according to claim 8, characterized in that said damping device (19A-4A, 19B-4B) acts between the connecting rod (6) and the frame (4).
10- Rampe selon la revendication 9, caractérisée en ce que ladite bielle de liaison (6) présente deux ailes (19A, 19B), de préférence sensiblement symétriques, qui sont destinées chacun à glisser sur une partie (4A, 4B) du châssis (4) avec un certain frottement durant le pivotement de ladite bielle de liaison (6) autour de la première articulation (7), ces ailes symétriques (19A, 19B) et lesdites parties (4 A, 4B) correspondantes du châssis (4) constituant ledit dispositif amortisseur (19A-4A, 19B-4B). 11- Rampe selon la revendication 10, caractérisée en ce que chaque aile (19A, 19B) de la bielle de liaison (6) glisse sur la partie (4 A, 4B) correspondante du châssis (4) via un patin de frottement (2OA, 20B) respectif durant le pivotement de ladite bielle de liaison (6) autour de la première articulation (7).10- ramp according to claim 9, characterized in that said link rod (6) has two wings (19A, 19B), preferably substantially symmetrical, which are each intended to slide on a portion (4A, 4B) of the frame ( 4) with a certain friction during the pivoting of said connecting rod (6) around the first articulation (7), these symmetrical wings (19A, 19B) and said corresponding parts (4A, 4B) of the chassis (4) constituting said damping device (19A-4A, 19B-4B). 11- ramp according to claim 10, characterized in that each flange (19A, 19B) of the connecting rod (6) slides on the corresponding portion (4 A, 4B) of the frame (4) via a friction pad (2OA , 20B) during the pivoting of said connecting rod (6) around the first articulation (7).
12- Rampe selon l'une quelconque des revendications 1 à 11, caractérisée en ce que les ressorts (16A, 16B) destinés à agir à l' encontre du pivotement de la rampe (1) autour de la deuxième articulation (8), sont disposés sensiblement horizontalement.12- ramp according to any one of claims 1 to 11, characterized in that the springs (16A, 16B) intended to act against the pivoting of the ramp (1) around the second articulation (8), are arranged substantially horizontally.
13- Rampe selon l'une quelconque des revendications 1 à 12, caractérisée en ce que les ressorts (16A, 16B) destinés à agir à l' encontre du pivotement de la rampe (1) autour de la deuxième articulation (8), sont accrochés chacun sur la bielle de liaison (6) en un point d'accrochage (17A, 17B) situé dans le voisinage de la deuxième articulation (8) de sorte à agir avec un certain bras de levier sur ladite deuxième articulation (8).13- ramp according to any one of claims 1 to 12, characterized in that the springs (16A, 16B) intended to act against the pivoting of the ramp (1) around the second articulation (8), are each hooked on the connecting rod (6) at an attachment point (17A, 17B) located in the vicinity of the second articulation (8) so as to act with a certain lever arm on said second articulation (8).
14- Rampe selon la revendication 13, caractérisée en ce que la distance entre ledit point d'accrochage (17A, 17B) de chaque ressort (16A, 16B) et la deuxième articulation (8) est réglable de sorte à pouvoir régler l'intensité de l'action desdits ressorts (16A, 16B) par rapport à ladite deuxième articulation (8).14- ramp according to claim 13, characterized in that the distance between said attachment point (17A, 17B) of each spring (16A, 16B) and the second articulation (8) is adjustable so as to adjust the intensity the action of said springs (16A, 16B) relative to said second articulation (8).
15- Rampe selon l'une quelconque des revendications 1 à 14, caractérisée en ce que chaque ressort (16A, 16B) est lié à son autre extrémité à un bras (IA, IB) correspondant de la rampe (1).15- ramp according to any one of claims 1 to 14, characterized in that each spring (16A, 16B) is connected at its other end to a corresponding arm (IA, IB) of the ramp (1).
16- Rampe selon la revendication 15, caractérisée en ce que chaque ressort (16A, 16B) est lié au bras (IA, IB) correspondant de la rampe (1) via un organe de traction (15 A, 15B), de préférence du type câble. 17- Rampe selon l'une quelconque des revendications 1 à 16, caractérisée en ce que les ressorts (16A, 16B) présentent une caractéristique relativement raide.16- ramp according to claim 15, characterized in that each spring (16A, 16B) is connected to the arm (IA, IB) corresponding to the ramp (1) via a traction member (15 A, 15B), preferably cable type. 17- ramp according to any one of claims 1 to 16, characterized in that the springs (16A, 16B) have a relatively stiff feature.
18- Rampe selon l'une quelconque des revendications 1 à 17, caractérisée en ce que les ressorts (16A, 16B) et/ou les ressorts supplémentaires (2 IA, 21B) sont des ressorts de traction.18- ramp according to any one of claims 1 to 17, characterized in that the springs (16A, 16B) and / or the additional springs (2 IA, 21B) are traction springs.
19- Rampe selon l'une quelconque des revendications 1 à 18, caractérisée en ce que les amortisseurs (18 A, 18B) destinés à amortir les mouvements de la rampe (1) autour de la deuxième articulation (8), s'étendent entre la rampe (1) et la bielle de liaison (6) de manière à converger en un point (Pl) situé à une certaine distance au-dessus de la deuxième articulation (8), de préférence même au-dessus de la première articulation (7).19- ramp according to any one of claims 1 to 18, characterized in that the dampers (18 A, 18B) for damping the movements of the ramp (1) around the second articulation (8), extend between the ramp (1) and the connecting rod (6) so as to converge at a point (P1) situated at a distance above the second articulation (8), preferably even above the first articulation ( 7).
20- Rampe selon l'une quelconque des revendications 1 à 19, caractérisée en ce que la bielle de liaison (6) présente plusieurs points de liaison possibles pour lesdits amortisseurs (18 A, 18B) de sorte à pouvoir adapter l'amortissement aux conditions de travail.20- ramp according to any one of claims 1 to 19, characterized in that the connecting rod (6) has a plurality of possible connection points for said dampers (18 A, 18B) so as to adapt the damping conditions working.
21- Rampe selon l'une quelconque des revendications 1 à 20, caractérisée en ce qu'un amortisseur supplémentaire (24) est implanté entre la rampe (1) et le châssis (4).21- ramp according to any one of claims 1 to 20, characterized in that an additional damper (24) is located between the ramp (1) and the frame (4).
22- Appareil agricole d'épandage de produits (2), caractérisé en ce qu'il comporte une rampe d'épandage de produits (1) selon l'une quelconque des revendications 1 à 21.22- agricultural product spreading device (2), characterized in that it comprises a product spreading ramp (1) according to any one of claims 1 to 21.
23- Appareil agricole d'épandage de produits (2) selon la revendication 22, caractérisé en ce qu'il est du type porté ou traîné par un tracteur agricole, ou du type automoteur. 23- An agricultural product spreading device (2) according to claim 22, characterized in that it is of the type carried or dragged by an agricultural tractor, or of the self-propelled type.
EP07731580A 2006-02-08 2007-02-06 Spray bar for spraying products and product -spraying agricultural appliance Withdrawn EP1983824A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0650450A FR2896949B1 (en) 2006-02-08 2006-02-08 PRODUCT SPREADING RAMP AND AGRICULTURAL PRODUCT SPREADING APPARATUS
PCT/FR2007/050754 WO2007090989A2 (en) 2006-02-08 2007-02-06 Spray bar for spraying products and product -spraying agricultural appliance

Publications (1)

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EP1983824A2 true EP1983824A2 (en) 2008-10-29

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ID=37057938

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EP07731580A Withdrawn EP1983824A2 (en) 2006-02-08 2007-02-06 Spray bar for spraying products and product -spraying agricultural appliance

Country Status (5)

Country Link
EP (1) EP1983824A2 (en)
CN (1) CN101378654B (en)
BR (1) BRPI0707595B1 (en)
FR (1) FR2896949B1 (en)
WO (1) WO2007090989A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011050578A1 (en) * 2011-05-24 2012-11-29 Amazonen-Werke H. Dreyer Gmbh & Co.Kg Agricultural distributor with distributor rods
CZ2013326A3 (en) * 2013-05-02 2014-06-18 Farmet A.S. Agricultural machine
CN105660577A (en) * 2016-04-11 2016-06-15 常州机电职业技术学院 Spray rod spraying device matched with high-speed rice transplanter
US11980180B2 (en) 2020-03-04 2024-05-14 Deere & Company Pendulum boom suspension

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD91743A (en) *
FR2559685A1 (en) * 1984-02-16 1985-08-23 Tecnoma Movable apparatus for spraying a liquid for treating plants
GB2222755A (en) * 1988-09-19 1990-03-21 Agro Electronique France Mechanism for suspending spreading ramp
CN2127556Y (en) * 1991-04-16 1993-03-03 诸城市城关镇农机管理服务站 Boom-type spraying trailer
NL9200936A (en) * 1992-05-27 1993-12-16 Greenland Nieuw Vennep Bv DEVICE FOR SPRAYING OR SPRAYING A LIQUID OVER THE LAND.
FR2813212B1 (en) 2000-08-25 2003-05-02 Exel Ind IMPROVED SPRAY RAMP

Non-Patent Citations (1)

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Title
See references of WO2007090989A2 *

Also Published As

Publication number Publication date
CN101378654B (en) 2011-02-16
FR2896949B1 (en) 2010-02-26
WO2007090989A3 (en) 2007-11-01
BRPI0707595B1 (en) 2016-10-04
CN101378654A (en) 2009-03-04
BRPI0707595A2 (en) 2011-05-10
FR2896949A1 (en) 2007-08-10
WO2007090989A2 (en) 2007-08-16

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