FR2789260A1 - Centrifugal spreader for connection to agricultural tractor has brackets which can be displaced parallel to transverse shaft - Google Patents

Abstract

The spreader has a container with two controllable outlets under which dispersing plates are arranged, driven by the power-takeoff shaft of a tractor. The dispersing plates can be displaced by means of a transverse shaft, to move the outlet point of the material to be spread. A gear train (4) connecting the power-takeoff shaft is arranged in a closed housing. The drive shaft (10) of each dispersing plate (11) is arranged with a corresponding corner gear (9) on a bracket (15) on the housing (5) and the bracket can be displaced on the housing parallel to the transverse shaft (7). Each bracket may be provided with an electrical or hydraulic actuator.

Description

i Centrifugal spreader with mounted drive shafts

each on a mobile console.

  The invention relates to a centrifugal spreader, equipped with a spreading product reservoir, provided with at least two controllable discharge openings and ejector discs arranged below, which are driven by the pick-up shaft. movement of the tractor, via an input transmission and a mechanical transmission train connected thereto. A transverse shaft, connected to the input transmission, transmits the torque to the drive shafts of the ejector discs by

  via a bevel gear transmission.

  The ejector discs and certain parts of the transmission train are mobile, so as to move the point

  feeding the spreading product.

  In today's agriculture, centrifugal spreaders, designed to distribute granular fertilizer and certain seeds, have proven themselves. Compared to arm spreaders, pneumatic spreaders for example, they however have the disadvantage that the different types of fertilizers exhibit friction behavior on the ejector disc and especially different flight properties. This results in the spreader having to be set differently for a certain width.

  depending on the type of fertilizer provided.

  Various adjustment systems are known for two-disc spreaders. For example, the ejector fins are made in two parts and can be adjusted as to their length to move the flight point outwards and thus increase the centrifugal acceleration. In addition, the ejector fins located on the ejector disc can be angularly adjustable to move the flight point in the peripheral direction. Another possibility, or additional arrangement, consists in modifying the speed of rotation of the ejector discs or else the inclination of the axis of the ejector disc relative to the vertical. Finally, the setting of the fertilizer supply point on the ejector disc is still to be mentioned. The earlier the fertilizer arrives on the ejector disc, the faster it leaves this ejector disc and the smaller the spreading width or, conversely, the wider the spreading width as the fertilizer is later supplied to the disc. The modification of the feed point makes it possible to have a particularly simple adjustment of the spreader according to the different types of fertilizer to be treated, because a single adjustment provision on each side of the spreader is sufficient. However, the prerequisite for obtaining a regular spreading image is that the feed point on the two ejector discs is

  absolutely identical.

  A known device (EP 0 496 285) makes it possible to adjust in the direction of travel the transmission casing arranged transversely with respect to the direction of travel, so that, the tank discharge openings being fixed, the supply point in fertilizer on the ejector disc will evolve. The relatively large technical cost, because the entire transmission must be housed in a guide frame in which it can be moved parallel to the driving direction, is disadvantageous. Each centrifugal spreader must also have an agitator mechanism to keep the product to be spread in a fluid state above the discharge openings and the agitator mechanism must also be driven by the PTO shaft of the tractor, this type of known construction requires, for the shaft of the agitator mechanism which is locally fixed, a particular transmission train which follows the movement of movement of the transmission casing. Another known device (EP 0 485 898) provides, for a centrifugal spreader equipped with four ejector discs, to effect a displacement of the ejector discs transversely with respect to the direction of travel, the drive of all the ejector discs taking place from the input transmission, by means of transverse shafts which are telescopic, the transverse shafts intended for the external ejector discs being further produced in the form of articulated shafts. Another embodiment provides for expensive couplings. The ejector discs or their drive shafts are guided in open sliding guides, which, with the harsh conditions of use of agricultural machines and the corrosive properties of fertilizer, necessarily leads to functional problems

  and very quickly deterioration.

  Training and guiding are very expensive,

  which involves high manufacturing costs.

  In another known embodiment of a two-disc spreader (DE 197 01 610), included in the preamble of claim 1, the ejector discs are displaceable with their transmission with bevel gear, transversely with respect to the direction of travel . To this end, they are guided in two parallel carriages of an open frame, and capable of being blocked by means of screws. The transverse shaft is made in three parts and consists of a middle part, driven by the input transmission, and two end parts mounted in a telescopic manner which drive by transmissions with angle transmission at their ends. drive shaft of the ejector discs. This embodiment with telescopic shafts is also expensive and functionally sensitive. The same goes for guiding the bevel gearboxes and the shafts of the ejector discs. On the other hand, because of its open construction, this achievement has not spread in agriculture where the conditions of use are often harsh. Starting from this known centrifugal spreader mentioned in the introduction, the object of the invention is to propose a simple construction method which is insensitive to harsh conditions of use, allowing a

  simple adjustment of the feed point.

  This problem is solved according to the invention first of all by the fact that the transmission train is arranged in a practically closed casing and that the drive shaft of each ejector disc with the corresponding bevel gear transmission is arranged on a console supported by the housing, the console being guided on the housing so as to be able to perform

  displacement parallel to the transverse shaft.

  With this embodiment, the entire transmission train is housed in a housing which is practically closed. The necessarily movable parts, precisely the drive shaft of the ejector disc and the associated bevel gear, are arranged on a console which is movable on the casing. There are thus only very narrow guide interstices which can be closed in a leaktight manner or protected without problem against contamination.

and corrosion.

  The casing has, for example, on its upper face, recesses the extent of which in the direction of the transverse shaft corresponds to the maximum travel of the console. In the simplest case, it may be an elongated hole in the casing which is shaped so as to be completely

  covered by the console, in any adjustment position.

  Advantageously, to guide the console, threaded bolts which engage in the elongated holes of the console are placed on the casing. A surface seal, preferably in the form of a sliding seal, is

  disposed between the console and the housing.

  According to another preferred embodiment, it is provided that the gears of the bevel gear transmission of each ejector disc are mounted in the console and that the transverse shaft is a profiled shaft, on which the drive gear of the bevel transmission is arranged with a

way allowing displacement.

  This embodiment offers the possibility of moving the console with the drive shaft intended for the ejector disc, knowing that there is only the drive gear of the return transmission.

  angle which moves on the profiled shaft.

  Due to the closed housing of the transmission, the transverse shaft can also be produced in the form of a telescopic shaft. However, the embodiment cited above is preferred, because of its

robustness and simplicity.

  To allow adjustment of the feed point, there is provided for each console a linear adjustment member arranged parallel to the transverse shaft in the casing and engaging, or

  directly, or indirectly, on the console.

  In the case of a mechanical adjustment member, an external crank is advantageously

  provided for actuation.

  The adjusting member can however also be driven electrically or hydraulically. This makes it possible in particular to have a remote control from the tractor, the adjustment member then being equipped with a device for returning information concerning the

position.

  According to another advantageous embodiment, two preset positions are associated with the adjustment member, one of which is the normal spreading position and the other is the spreading position at the field boundary. The first position corresponds to a determined working width, for example the minimum working width, and the two discs are adjusted in this position. Starting from this basic position, the spreader can be adjusted by a single adjustment maneuver of the two ejector discs to adapt to other working widths and / or other kinds of fertilizer. In addition, in the event of spreading at the edge of a field, the ejector disc can be moved close to the field limit to bring it to the second preset position, while the ejector disc located on the side opposite the limit

  of the field remains in the normal spreading position.

  To obtain an axial fixing of the transverse shaft, it can press, by its ends, on blocks which are arranged on the covers

crankcase fronts.

  As already indicated, the two-disc spreaders include, in the spreading product reservoir, agitator mechanisms installed above each discharge opening, and driven by a shaft common to these agitator mechanisms. According to the invention, the shaft of the agitator mechanisms is driven by the input shaft of the transmission train, located outside the casing, therefore independently of the movement of the ejector discs. If the drive shaft of the agitator mechanisms is arranged parallel to the transverse shaft of the transmission train, it is then driven in an oscillating manner by means of an eccentric placed on the input shaft and a freewheel mounted downstream, like this

  is known, and for example, described in EP 0 496 285.

  The transmission train housing can be mounted by screwing or also by welding, as a

  construction module, on the frame of the spreader.

  A particularly simple embodiment is distinguished by the fact that the casing of the transmission train is constituted by a tube with rectangular section, closed on its front faces by covers which can be screwed or welded. Compared to a molded casing, it is thus possible to use inexpensive rectangular section tubes,

Trade.

  The realization of the housing in the form of a tube with rectangular section offers, in particular, the possibility of integrating the housing as a load-bearing part in the construction of the frame. Thus, the casing can, for example, constitute the rear closure of the frame. As such, the tubular casing can also serve as a laying foot for the spreader and also constitute a bumper for maneuvering in reverse, for example when passing under a trailer to transfer of the spreading product in the spreading tank. Instead, the housing may also include mounting feet and / or

  bumpers for reverse maneuvering.

  Another embodiment of the invention is characterized in that the outer face of the casing has a graduated scale enabling the position of the axis of the ejector disc to be displayed relative to the discharge opening. This visual indication, provided in particular when dealing with a manually adjusted mechanical adjustment member, allows the farmer to obtain direct control of the adjustment of the spreader as to the predetermined values which are given in the table d spreading. The scale then carries numbers preferably going up in the direction of the position of the axis of the ejector disc closest to

the discharge opening.

  The closer the disc axis is to the discharge opening, the greater the working width. Quantification by a scale expresses this using numerical values of corresponding meaning. In the case of a centrifugal spreader produced according to the invention, the transmission train gives a transmission ratio corresponding to a drive of the ejector discs at a rotation speed between 850 and 900 rpm, different from the conventional rotation speeds which are 980 rpm or 720 rpm. Compared to a rotation speed of 980 rpm, a reduction in the suction effect in the area of the discharge opening is obtained, an effect by which the effective quantity of fertilizer is distorted compared to the quantity having been set. In addition, by having the same peripheral speed, it is possible to have longer ejector fins providing sufficiently long guiding of the fertilizer, which is important in particular in the case of an adjustment of the ejector disc axis distant from the discharge opening. Compared to the lower rotational speed of 720 rpm, a smaller quantity of fertilizer in the fin is advantageously obtained for a determined and regulated spreading quantity, and for an identical peripheral speed, a flight circle diameter inferior. Thus, for large ejector discs or long electrifying fins, the maximum transport width is respected and the protection of the ejector discs to be provided with respect to the tractor side can be maintained so

relatively small.

  According to yet another suitable embodiment, the ejector discs are mounted on their drive shaft with quick couplings, easily detachable, so that they can be replaced in a simple manner. This embodiment is particularly suitable if the spreader is used for working widths ranging from small widths to extremely large widths, which cannot be covered by a single adjustment of the feed point. In this case, it is planned to have several sets of ejector discs having to satisfy different ranges of working widths and / or types of fertilizer, these sets being able to be changed at will. The same goes for at least one interchangeable disc

spreading material at the edge of the field.

  According to another advantageous embodiment, the transmission train for at least one ejector disc has a transmission stage with the possibility of varying the speed of rotation, which again, advantageously, has a preset respectively for normal spreading and for l boundary spreading. Such an embodiment is, for example, the subject of the previous German patent application 198 30 722. The spreader can thus be converted in a simple and advantageous manner for a

boundary spreading.

  When the fertilizer comes out of the discharge opening, there are what are called impact effects, that is to say that part of the fertilizer particles, when the arrival on the ejector fins, is returned in a large number of directions and that only part of the quantity of fertilizer, even if this is the major part, is captured by the ejector fin and accelerated towards the exterior as desired. The homogeneity of the distribution

  of fertilizer suffers from this phenomenon. We avoid this

  ci, in the case of a known embodiment (EP 0 380 040) by the fact that a discharge well is connected to the discharge opening, a well whose lower edge is disposed immediately above of the upper edge of the ejector fin and parallel to it. As the ejector discs of the conventional centrifugal spreader are curved like a plate to increase ballistic performance, in the event of adjustment of the feed point according to the invention, it can no longer be satisfied

  the construction requirement presented above.

  This is why, in the case of another preferred embodiment, provision is made for the well to be produced in two parts and for its lower part to follow, by the lower edge, the inclination of the ejector fins, during the ejector disc adjustment. To avoid manual adjustment, it is preferably additionally provided that the position of the lower part of the drainage well can be modified by means of a connection to the console in

  function of its displacement.

  For example, the lower part can be mounted on the upper part of the evacuation well, on an axis parallel to the transverse axis and can be pivoted between a position with a horizontal lower edge, in the position of the disc axis. ejector furthest from the discharge opening, and a position with the lower edge inclined downward in the direction of rotation of the ejector discs, in the position of the disc axis

  ejector closest to the discharge opening.

  This pivoting embodiment offers the possibility that the connection between the console and the lower part consists of a simple stirrup, fixed to the console and engaging by its upper branch, which extends in the direction of the transverse shaft, but at an angle to it, in an elongated hole in a tab

fixed on the lower part.

  The caliper is therefore moved jointly with the console when adjusting the axis of the ejector disc, its angle of inclination allowing the adjustment stroke necessary for the pivoting movement of the lower part. The angle of inclination of the upper arm of the stirrup relative to the horizontal corresponds for example to the angle of inclination of

  the upper edge of the ejector fin.

  Instead, the lower part can be arranged on the upper part of the drainage well, in a manner also movable in height. Finally, it is advantageous for the evacuation well to be provided, on its underside, with a brush reaching the upper edge of the electrifying fins. Since the brush reaches the upper edge and can be kept away from it, the fertilizer is transferred to the ejector fin without

that there be loss by impact.

  It is finally advantageous that, when the area of the opening cross-section increases, the center of gravity of the surface of the evacuation opening which can be controlled is moved in the opposite direction to the direction of rotation of the ejector disc and / or outwards on it. We object to this

  does what is called the mass effect.

  The invention will now be described with the aid of some exemplary embodiments illustrated by the drawings, in which only part of the centrifugal spreader and its transmission has been shown: FIG. 1 is a sectional and elevation view from the rear of a two-disc spreader and its transmission housing; 30. Figure 2 is an elevational view corresponding to Figure 1; Figure 3 is a top view of the embodiment of Figures 1 and 2; Figure 4 is an elevational view of the front face of the housing for a position of the feed point remote from the axis; Figure 5 is a view corresponding to Figure 4 for a position of the feed point close to the axis; Figure 6 is a view corresponding to Figure 1 of another embodiment of the two-disc spreader; Figure 7 is a top view of another embodiment of a two-disc spreader; and Figure 8 is a perspective view from the rear

of the spreader.

  The two-disc spreader has a spreading tank comprising two hoppers,

  of which only one hopper 1 is illustrated in the drawing.

  Each hopper has a discharge opening 2, to which is connected a discharge well which is generally designated by 3. The discharge opening 2 can be controlled by means of a register.

not shown.

  The frame or chassis, not shown, of the two-disc spreader supports the storage tank and the transmission generally designated by 4, the casing 5 of which is formed by a tube with rectangular section, closed at its ends by covers 6. The transmission comprises a transverse shaft 7 which is driven by the input shaft 8, by means of a bevel gear transmission mounted in the center (Figure 3). The input shaft 8 is coupled to the power take-off shaft of the tractor by means of an articulated shaft. The transverse shaft 7 drives, via each of an angular transmission 9, the drive shafts 10 of the convex ejector discs 11 and on the upper face of which are arranged at least two electrifying fins 12. The ejector discs 11 can be fixed on the drive shafts 10 to the

  by means of quick couplings or the like.

  The transverse shaft 7 is produced in the form of a profiled shaft, for example a polygonal profile shaft, on which the bevel gears 13 for driving the bevel gear are guided in a movable manner. It is fixed axially by blocks 6 'mounted in the covers 6 of the casing 5. The drive shaft 10 and the bevel gear 9 with the bevel drive 13 and driven gears 14 are rotatably mounted in a console 15 covering the recess 16 formed in the upper face of the casing 5. The recess 16 is for example produced in the form of an elongated hole. A sliding seal, for example a flat seal, is arranged between the console 15 and the upper face of the casing. If necessary, the sealing gap may also be covered by an elastic sleeve or the like, which is fixed on

  the console 15 and / or on the casing 5.

  Each console 15 is associated with an adjusting member 17 produced in the form of a pin, which is mounted in the covers 16 on the front side of the casing 5 and provided on the outside of the casing 5 with a crank 18. In rotating the crank 18 the console 15 can be moved transversely with respect to the direction of travel, the drive gear 13 of the bevel gear 9

  being moved on the profiled transverse shaft 7.

  The drive shaft of the ejector disc 11 then changes position relative to the discharge well 3, so that the fertilizer supply point on the

ejector disc is moved.

  The amplitude of the movement or the adjustment of the feed point using the spreading table can be read on a graduated scale 19 (FIG. 2) which cooperates with an indicator or needle 29 fixed on the console 15. Figure 2 shows an average setting for an average working width. The scale is scaled so that the numerical values increase with the movement of the feed point inwards (greater spreading width) or decrease in the case of movement towards the outside. The brackets 15 have on their opposite narrow sides guide slots 21 by means of which they are guided by bolts 22 which are fixed, for example by welding, on the face

upper cover 5 (Figure 3).

  As seen in Figures 1 and 2, the ejector discs 11 are curved. Consequently, the upper edge 23 of the electrifying fins 12 has a corresponding inclination. The evacuation well 3 has a lower edge 24 of corresponding inclination, edge on which, in the example of embodiment shown, is still fixed a strip of bristles or bristles 25 which reach the upper edge 23 of the blades The fact that, during the displacement of the feed point, there is a modification of the position of the ejector fin 12 and, therefore, of its upper edge 23 relative to the lower edge 24 and / or the strip of bristles or bristles 25 from the evacuation well 3. The evacuation well 3 is made in two parts. It has a rigid upper part 26 which is connected directly to the discharge opening 2, and a movable lower part 27 which is connected to it. The lower part 27 is coupled to the movable console 15 by means of a link 28 produced in the form of a stirrup which is fixed to the console by one of its branches 29 and engages on the lower part 27, by its other branch 30. Details

  more precise are visible in Figures 4 and 5.

  In FIGS. 4 and 5, the electrifying fins 12 are shown in cross section, having a U-shape. FIG. 4 represents an adjustment of the console 15 for which the feed point is in its most furthest position. 'outside. In this position, the lower edge 24, respectively the brush 25 being fixed thereto, of the lower part 27 of the well 3 extends approximately horizontally. FIG. 5, on the other hand, represents a position in which the feed point is in its position closest to the axis of the ejector disc. The upper edge 23, respectively the upper branch of the ejector fin 12, is thus located lower. To ensure that, in this position, the fertilizer is also transferred to the ejector fin 12 without there being any impact losses, the lower part 27 of the well is pivotable around an axis 31 fixed on the upper part 26. In addition, on the lower part 27 is mounted a tab 32 having an elongated hole 33 in which the upper branch 30 of the stirrup 28 engages with play. When the console 15 and the ejector disc 11 are moved, from the position shown in FIG. 4 with a feed point distant towards the outside, in the position shown in FIG. 5, due to the inclination of the upper branch 30 of the stirrup 28 (FIG. 1), the tab 32 is raised and, thus, the lower part 27 of the well 3 is tilted, precisely, so that the lower edge 24, respectively the brush 25, is inclined downward in the direction of rotation of the ejector disc 11. The edge of the drainage well or the the lower part 7, located at the rear in the direction of rotation, thus follows the inclination of the upper branch 23 of the ejector fin 12 during the adjustment movement of the feed point. In the embodiment of Figure 6, the transmission 4 is not performed symmetrically. As in FIGS. 1 to 3, the input shaft 8 drives, by means of a centrally disposed angle transmission, the profiled shaft 7 which in the same way drives the ejector disc 11 shown at left, precisely by

  via a bevel gear 9.

  The ejector disc 11 shown on the right is, on the other hand, driven by a variation transmission 34 which, in the illustrated embodiment, is produced in the form of a V-belt transmission with variable transmission ratio (variator). The driving pulley 35 of the V-belt transmission 34 is driven via an angular transmission 9, from the profiled shaft 7, and transmits its torque via the V-belt 36 to the pulley 38 which is mounted on the drive shaft 10 of the ejector disc 11, below the latter. The drive shaft 10, in turn, is mounted in a bearing 39 of a console 15 which extends over the entire length of the V-belt 34. The casing 5 has, in the area of the shaft passage at the level of the bearing 39, a first recess 41 and, in the area of the bevel gear 9 at the level of the driven shaft 42 exiting upward, another recess 43. The console 15 rests for a large part of its surface on the upper face of the casing, and is guided, like the console 15 of the left ejector disc produced in the form already described, and is moved by means of

  the crank 18 and the adjusting member 17.

  For a predetermined speed of rotation of the driven part of the power take-off shaft of the tractor, the left ejector disc is driven by the bevel gear 9 according to a determined transmission ratio, leading to an increase in speed of rotation. In a basic setting of the variation transmission 34, the right ejector disc rotates at the same rotational speed. The variation transmission 34 makes it possible, however, to effect on one side a reduction in the speed of rotation which may, for example, be desired in order to carry out limit spreading. In addition, the adjustment of the feed point, in order to adjust different working widths or to adapt to different types of fertilizers, is carried out in the

  described, by a displacement of the consoles 15.

  In the embodiment which is shown in the top view of FIG. 7, the drive shaft 10 of the ejector disc arranged on the left, but not shown, is in turn driven by means of a transmission with bevel gear according to Figures 1 to 3 and 6, while the ejector disc disposed on the right is again driven by a V-belt transmission 34 with variable transmission ratio. The motor shaft 42 escapes from the transmission casing 5 in this case, towards the front and parallel to the input shaft 8. In the embodiment of FIG. 6, it is moved by a transmission with bevel gear, from the profiled shaft 7. The drive pulley 35 of the V-belt transmission 34 in turn drives a pulley 38 whose shaft 44 is arranged parallel to the shaft 42 and is mounted in a shaft passage 48 on the rear wall of the casing 5. The driven shaft 44 in turn drives, by an angular transmission, the drive shaft 10 of the right ejector disc, the passage of which d 'shaft, as for the left ejector disc, is mounted in a console 15, movable by means of the crank 18. In this embodiment, another console 46 is provided, which is used for mounting on the front wall of the casing 5 of the motor shaft 42 and of the transmission shaft 44 of the V-belt transmission 34 and which is connected to the console 15. When adjusting the feed point of the right ejector disc, it is therefore not this one, but the entire V-belt transmission 36 which is moved, the driving gear wheel of the bevel gear 9

sliding on the profiled shaft 7.

  Figure 8 shows the complete two-disc spreader seen from the rear. The spreading product reservoir, with the two hoppers 1, is mounted on a frame 50 which has two parallel horizontal beams 51, extending towards the rear, beams on which the rectangular section tube 4 of the casing 5 is mounted by welding. The rectangular section tube 4 therefore stiffens the frame in its rear area. On the rectangular section tube are mounted by welding, spaced from each other, sheet metal parts 52 in the form of U which, on the one hand, constitute laying feet for the spreader and, on the other hand , act as a bumper and impact protection for the

maneuver in reverse.

Claims (38)

  1. Centrifugal spreader, equipped with a spreading product tank provided with at least two controllable discharge openings and ejector discs arranged below and driven by the power take-off shaft of the tractor by l via an input transmission and a mechanical transmission train connected thereto, a transverse shaft, connected to the input transmission, transmitting the torque to the drive shafts of the ejector discs, each via of an angular transmission, and the ejector discs, as well as certain parts of the transmission train being movable so as to move the feed point of the spreading product on the ejector disc, characterized in that the train transmission (4) is arranged in a substantially closed casing (5) and in that the drive shaft (10) of each ejector disc (11) with the associated bevel gear (9) is disposed on a console (15) supported by the housing (5), the console (15) being guided on the housing (5) so as to be able to move   parallel to the transverse shaft (7).   2. Centrifugal spreader according to claim 1, characterized in that the casing (5) has, on its upper face, recesses (16) whose extent in the direction of the transverse shaft (7) corresponds to the stroke of displacement maximum of consoles (15).   3. Centrifugal spreader according to claim 1 or 2, characterized in that the console (15) completely covers the recess (16), any adjustment position.   4. Centrifugal spreader according to claim 1 or 2, characterized in that the console (15) is guided, using elongated holes (22), cooperating with bolts (22) mounted on the housing (5). 5. Centrifugal spreader according to one   any of claims 1 to 4, characterized in   that between the console (15) and the casing (5) is arranged   a sliding seal. 6. Centrifugal spreader according to one   any one of claims 1 to 5, characterized in that   that the gears (13, 14) of the return transmission   angle (9) are mounted in the console (15). 7. Centrifugal spreader according to one   any one of claims 1 to 6, characterized in that   that the transverse shaft (7) is a profiled shaft on which the drive gear (13) of the bevel gear (9) is capable of moving. 8. Centrifugal spreader according to one   any one of claims 1 to 6, characterized in that   that the transverse shaft (7) is a telescopic shaft.   9. Centrifugal spreader according to one of the   Claims 1 to 8, characterized in that for each   console (15) is provided with a linear adjustment member (17), arranged parallel to the transverse shaft (7) in the casing (5) and engaging on the console (15).   10. Centrifugal spreader according to claim 9, characterized in that the adjustment member (17) has a crank (18) placed   externally, for actuation. 11. Centrifugal spreader according to one   any one of claims 1 to 9, characterized in that   that the adjusting member is driven electrically or hydraulically. 12. Centrifugal spreader according to claim 11, characterized in that the adjustment member is equipped with a position feedback device, for remote control actuation. 13. Centrifugal spreader according to one   any of claims 9 to 12, characterized in that   that two pre-adjustable positions, for normal spreading and boundary spreading, are associated with the adjusting member (17). 14. Centrifugal spreader according to one   any one of claims 1 to 13, characterized in that   that the transverse shaft (7) is fixed axially, at its ends, by blocks, provided on the   covers (6) located on the front side of the housing (5). 15. Centrifugal spreader according to one   any of claims 1 to 4, comprising a   agitator mechanism arranged in the tank above each discharge opening, driven by means of an agitator mechanism drive shaft, characterized in that the agitator mechanism drive shaft is driven by the input shaft (8), located outside the housing (5), transmission train (4).   16. Centrifugal spreader according to claim 15, characterized in that the agitator mechanism drive shaft is arranged parallel to the transverse shaft (7) of the transmission train (4) and is driven in an oscillating manner by the intermediate of an eccentric mounted on the shaft   drive (8) and a free wheel mounted downstream. 17. Centrifugal spreader according to one   any of claims 1 to 16, characterized in   that the casing (5), comprising the transmission train (4), is mounted by screwing as   construction module on the frame of the spreader. 18. Centrifugal spreader according to one   any of claims 1 to 16, characterized in   that the casing (5), comprising the transmission train (4), is mounted by welding as   construction module on the frame of the spreader. 19. Centrifugal spreader according to one   any of claims 1 to 18, characterized in that   that the casing (5) is constituted by a tube with rectangular section, closed at its front faces by covers (6). 20. Centrifugal spreader according to one   any one of claims 1 to 19, characterized in that   that the casing (5) is a load-bearing part of the frame closing at the back of it. 21. Centrifugal spreader according to one   any of claims 17 to 20, characterized in   that the casing (5) constitutes at the same time the foot of spreader installation. 22. Centrifugal spreader according to one   any of claims 17 to 21, characterized in   that the housing (5) constitutes a bumper during the   reverse operation of the spreader. 23. Centrifugal spreader according to one   any of claims 17 to 20, characterized in   that the housing (5) has mounting feet and / or   bumpers for reverse maneuvering. 24. Centrifugal spreader according to one   any one of claims 1 to 23, characterized in that   that on an outer face of the casing (5), is arranged a reading scale (19), intended to visually indicate the positions of the ejector disc (11) by   relative to the discharge opening (2).   25. Centrifugal spreader according to claim 24, characterized in that the scale (19) has numbers which increase in the direction of the position of the ejector disc (11).   closer to the discharge opening (2). 26. Centrifugal spreader according to one   any one of claims 1 to 25, characterized in that   that the ejector discs (11) are driven at a   rotation speed between 850 and 900 rpm. 27. Centrifugal spreader according to one   any of claims 1 to 26, characterized in   that the ejector discs (11) are mounted on their drive shaft (10) using quick couplings that can easily be detached. 28. Centrifugal spreader according to one   any of claims 1 to 27, characterized in   that several sets of ejector discs are provided, for different ranges of working width and / or types of products to be spread. 29. Centrifugal spreader according to one   any of claims 1 to 28, characterized in   at least one interchangeable disc is provided for a boundary spreading. 30. Centrifugal spreader according to one   any of claims 1 to 28, characterized in   that the transmission train (4) has, for at least one ejector disc (11), a transmission stage (34) with variation of the speed of rotation.   31. Centrifugal spreader according to claim 30, characterized in that the transmission stage (34) with variation in rotational speed has a preset for normal spreading and boundary spreading.   32. Centrifugal spreader according to one of the   claims 1 to 31, the discharge opening (2)   being extended by a drainage well (3), of which   the lower edge (24) is disposed directly above   above the upper edge (23) of the ejector fin (12) mounted on the ejector disc (11) and parallel to it, characterized in that, in the case of domed ejector discs (11), the well (3) is made in two parts and in that its lower part (27) follows, by its lower edge (24), the inclination of the ejector fins (12) during ejector disc adjustment (11).   33. Centrifugal spreader according to claim 32, characterized in that the position of the lower part (27) of the evacuation well (3) is capable of being modified by means of a link (28) to the console. (15), while moving of it.   34. Centrifugal spreader according to claim 32 or 33, characterized in that the lower part (27) is mounted on the upper part (26) of the evacuation well (3), on an axis (31) parallel to the shaft transverse (7), and is capable of pivoting, between a position in which the lower edge (24) is horizontal corresponding to the position of the axis of the ejector disc (11) furthest from the discharge opening ( 2), and a position in which the lower edge (24) is inclined downward, in the direction of rotation of the ejector disc (11), corresponding to the position of the axis of the ejector disc (11) most   close to the discharge opening (2).   35. Centrifugal spreader according to claim 33 or 34, characterized in that the connection between the console (15) and the lower part (27) is produced by a stirrup (28) fixed to the console (15) and engaging by its upper branch (30), extending substantially in the direction of the transverse shaft (7) but inclined relative to the latter, in an elongated hole (33) formed   in a lug (32) fixed to the lower part (27).   36. Centrifugal spreader according to claim 32 or 33, characterized in that the lower part (27) is arranged in an adjustable manner in height on the upper part (26) of the well. evacuation (3). 37. Centrifugal spreader according to one   any of claims 32 to 36, characterized in   that the evacuation well (3) is equipped on its lower edge (35) with a brush (25) reaching the upper edge (23) of the fins ejectors (12). 38. Centrifugal spreader according to one   any of claims 1 to 37, characterized in that   that the center of gravity of the surface of the discharge opening (2) which can be controlled, moves in the opposite direction to the direction of rotation of the ejector disc (11) and / or outward thereon, when the area of the opening cross section increases.