WO2019170282A1

WO2019170282A1 - Twin disc spreader with hydraulic drive of the distribution discs

Info

Publication number: WO2019170282A1
Application number: PCT/EP2019/000063
Authority: WO
Inventors: Franz Doll; Thomas Zeitvogel; Volker Stöcklin
Original assignee: Rauch Landmaschinenfabrik Gmbh
Priority date: 2018-03-08
Filing date: 2019-03-05
Publication date: 2019-09-12
Also published as: DE102018001875A1

Abstract

The invention proposes a twin disc spreader having two rotatably mounted distribution discs (5, 6) and a dosing element allocated to each of the distribution discs (5, 6). Each distribution disc (5, 6) is rotationally driven by a corresponding hydraulic motor (30, 31), and a flow control valve (34, 35) is allocated to each hydraulic motor for the open-loop or closed-loop control of the rotational speed of the distribution discs (5, 6) independently of one another. To minimise the risk of exciting oscillations of the hydraulic system during load changes, the invention proposes that the respective flow control valve (34, 35) of a corresponding hydraulic motor (30, 31) is connected to the hydraulic motor (30, 31) in the direct vicinity of same. The distribution discs (5, 6) can more particularly be mounted on or in a support console, wherein a respective hydraulic motor with the respective flow control valve preferably also can be arranged on or in the support console (13) and for example form a unit in the form of a hydraulic block (37).

Description

Two disc spreader with hydraulic

Drive the distributor discs

The invention relates to a two-disc spreader with two rotatably mounted distributor disks and one each, egg ner respective distributor disc associated dosing, wherein a respective distributor disc of each one on or in the support bracket arranged hydraulic motor is drehange- driven, which for controlling and / or regulating the speed of Manifolds independently associated with each one flow control valve.

As a two disc spreader ausgestaltet agricultural che distribution mesh find for the application of powdered and / or particulate Verteilgut, such as fertilizer or seed, widespread use, such as in pulled or by a three-point power lift a Zugma machine, such as a tractor, recorded type. Such Zweibenibenstreuer usually include a Ver the divisional receiving container with two approximately funnel-shaped downwardly tapering sections, at the bottom of each one or more outlet openings are arranged, where in each case a dosing is associated with the or each outlet opening (s) to remove the material in the ge desired amount - or more precisely: with the desired mass flow - the container. The dosing is by means of a suitable actuator, e.g. in the form of a hyd raulik- or electric cylinder, a servomotor or the like, up and steuste to division depending on the desired distribution width and application rate per unit area of the material to be spread on the ground, depending on speed and depending on the physical properties of the material to be spruced, such as its flowability to adjust the desired mass flow can. Below the dosing

1

CONFIRMATION COPY ne is ever a rotatably mounted and rotatably driven distributor disc, by means of which the distribution is well distributed over the desired working width. Some Zweischeibenstreuer are also equipped with a device for adjusting the Aufgabepunktes of the Verteilerut on a respective, usually provided with spreader Vertei lerscheibe, the task point with respect to the distributor disc radially (in particular to magnification tion / reduction of the spreading fan) and / or in the circumferential direction (Especially for rotating the scattering fan about the axis of rotation of the distributor disc) can be adjusted.

Such an agricultural distributor is known for example from DE 10 2005 015 228 Al. Wei tere fields of use of generic Zweipibenstreu ern, which are also referred to as a spreader, represent the winter service and road construction for distributing grit, road salt or other, powdered to granular distribution goods.

In order to put the distributor disks in rotation, usually in opposite directions, various types of drive are known, and in recent years the option of changing the speed of a respective distributor disk is always sought independently of one another, for example for the purpose of bordering or edge scattering in the area of the field border, near non-polluting areas, such as in the interior of the field existing tree islands, rocks, etc., when entering the headland or when driving out of the headland, which does not necessarily perpen- dicular to run on the field created lane to avoid local over- and under-supplies by making precise adjustments. Furthermore, can be by indivi duelle change in the speed of the distributor discs the Covering large working widths, a simple adjustability to different smaller working widths and - as already mentioned - achieve a suitable adaptation to ver different grit types and distribution types, such as a normal, border or border spreading, with part width circuits are possible, such as Outreach of field wedges and the like.

In the simplest case, the drive of the distributor discs in a purely mechanical manner by the Vertei lerscheiben bearing waves are connected to a drive train in conjunction, which has a central input shaft, which is connected to a PTO of a tractor, such as a tractor. The central input shaft of the drive train usually drives via a central gear Ge serving to drive a respective distributor disc transverse shaft, wherein the central transmission z. B. may include a bevel gear provided with corner gears, via which the central input shaft with the transverse shaft is in rotary connection. The transverse shaft is in turn via a respective gearing with a respective support shaft egg ner respective distributor disc in rotary connection. In order to provide a variable speed of the distributor plates largely independently, one of the distributor discs by means of a downstream of the central transmission to parent reduction gear with variable output speed with a respect to the other distribution discs different speed can be rotated. Such a ticket dispenser is known, for example, from WO 2017/045763 A1.

In addition, on the other hand, much more comfortable drives of the distributor disks are known, with which the two-disc spreader itself is equipped. In addition to electrical drives, which each have one, a respective distribution Include lerscheibe associated electric motor whose rotational speed is independently controlled or regulated and which can be connected to their power supply to the electrical system of a train machine or a tractor, in particular hydraulic drives are used, wel che also each a respective distributor disc associated hydraulic motor, the speed of which is independent controllable or adjustable by means of flow control valves to independently control the speed of the distributor discs and / or to regulate and in this way, for example, even with relatively complex field geometries for a simple edge or wedge spreading to care. The hydraulic motors are either to the hydraulic system of a tractor, such as a tractor to be closed or the Zweischeibenstreuer is equipped with a eige NEN hydraulic system, the Hydraulikmoto ren usually in a direction approximately perpendicular to the direction extending support bracket are arranged, which also for storage serving the distributor discs Wel len serves.

A for supplying the hydraulic motors with hydraulic fluid and for controlling the hydraulic motors serve the hydraulic block, which in particular the respec conditions hydraulic motor associated flow control valves, is usually located in the direction of travel vorde ren, so the tractor or the tractor facing side of the two disc spreader and therefore requires a re relatively expensive guidance of the hydraulic lines from the hydraulic block to the hydraulic motors. EP 2 386 198 B1 addresses this problem by virtue of the fact that the hydraulic block is connected to a support bracket carrying the hydraulic motors via a mechanical support, which leads to a compact construction and a simple exchange of the Hydraulic motors, eg on the occasion of a maintenance, guaranteed, but nevertheless may be liable problembe in several respects. Thus, for example, the relatively long hydraulic lines which connect the flow control valves housed in the hydraulic block to the respective hydraulic motors, in particular at relatively high mass flows of material to be transported, are in danger of being set in vibration, with the result that the speeds of the distributor disks are not remain sufficiently stable. This is primarily due to the fact that the mass flow from the dosing exiting material is cut off during the operation of the spreader vanes of the distributor discs, which at regular intervals temporarily higher load on the turbulence equipped with the spreader discs shafts in the drive train to the distributor disks is transmitted. It ent thus are load peaks, which can put the entire system in vibration and causes the aforementioned rotational speed fluctuations of the hydraulic motors, so that it can lead to scattering errors. Since the hydraulic line is located between a jewei time hydraulic motor and its associated flow control valve of the hydraulic block, such load peaks or the ensuing th vibrations of electronic control systems can be very difficult compensated, which is particularly true when it comes to the hydraulic lines Conventional hydra likschläuche acts, which are due to their Elastizi expand both in scope and in length according to the pressure peaks or contract again. It should be added that both the hydraulic lines and in particular the special special hydraulic block are usually arranged more or less open under the spreader roof, so that they both the scattered Verteilgutpartikeln and Dirt and moisture are exposed, which is why the Hyd raulikblock including its connections must be coated in a complex manner thick-layered with special coatings to prevent corrosion. Critical are here also open the distribution (fine) particles exposed hydraulic fittings, which are very difficult to protect against corrosion. This arrangement also requires egg nen relatively complicated installation or removal of the hydraulic blocks, eg for maintenance purposes, because the operator must "crawl" under the spreader roof to block the hydraulic or to reach its connections for the hydraulic lines.

The US 2005/0173568 Al describes a designed as an attachment to a transport vehicle Zweischeibenstreuer with two rotatably mounted distributor discs, which are rotationally driven by a hydraulic motor. The hydra likmotoren communicate with a common flow control valve, so that the opposing speed of the distri lerscheiben not independent of each other, but only in common can be changed. The environment freely exposed ned flow control valve of the two hydraulic motors, wel Ches liksystem of the transport vehicle can be connected via appropriate hydraulic lines to a hydra, is fixed to one of the two outer sides of the support frame of the two disc spreader, so that here also the above with respect EP 2 386 198 Bl described problematic vibrational excitations results, which lead to unstable speeds of the distributor discs. Due to the asymmetrical arrangement of the flow control valve with respect to the two hydraulic motors in this case another problem is that the hydraulic motors can be excited to different vibrations, which can not be compensated practically, since the common flow control valve supplies both hydraulic motors and - as already mentioned - no unilateral change in speed allows.

The invention is therefore the object of a Zweischeibenstreuer of the type mentioned under at least most extensive avoid the disadvantages mentioned in a simple and cost-effective manner to further educate that with the simplest handling of the hydraulic system, the risk of vibration excitation of the same and thus consequent scattering error mi is minimized.

According to the invention this object is achieved in a Zweischei benstreuer of the type mentioned above in that the respective flow control valve of a respective hydraulic motor in the immediate vicinity of a respective Hydraulikmo sector is connected to this.

Due to the inventive design, according to which a respective hydraulic motor associated Stromregelven til directly, in particular without interposition of a Hyd raulikleitung is connected to the hydraulic motor, load peaks, as they are caused due to a truncation of the VerteilgutStromes through the spreader vanes of the rotating Ver, permanently adjusted without the risk of vibration excitation of the hydraulic system. Since between the respective hyd raulikmotor and its flow control valve in this way no "long" hydraulic line is arranged, which in turn can be put on the basis of their usually more or less pronounced elasticity in turn vibrating, as a result of which they occur in their extent and in length accordingly Pressure spikes expand or contract again, and therefore, for example, set by the flow control valve, about constant flow rate Hydraulic fluid de hydraulic motor can no longer be constantly supplied leads, corresponds to the hydraulic motor supplied volume flow of hydraulic fluid practically exactly the volume flow set by the associated flow control valve, without this being changed raulikleitungen due to interposed Hyd.

In an advantageous embodiment, it can be provided that the distributor disks (5, 6) are rotatably mounted on or in a Tragkon sole (13), which is in particular set to egg nem frame of the distributor and extends for example approximately transverse to the direction of travel.

Furthermore, it can preferably be provided that

- The respective hydraulic motor and / or

- The respective flow control valve of a respective hydra likmotors,

In particular, both the respective hydraulic motor and its respective flow control valve, is or are arranged on or in such a support bracket. The arrangement of the hydraulic motors or their flow control valves on or before preferably in the support bracket ensures on the one hand easy accessibility both to the hydraulic motors and in particular to the flow control valves, so that there is a simpler installation and in particular a more convenient maintenance. On the other hand, the support bracket is largely protected due to their arrangement below the distributor discs from flying particles scattered, so that there is less Lackieraufwand to the hyd raulischen components receiving support bracket and in particular also special to preserve the fluidic contacting hydraulic lines to prevent corrosion. However, the hydraulic motors and / or their flow control valves can in principle of course also be arranged differently, such as, for example, on the frame of the two-disc diffuser. ers, at a serving for receiving the distribution goods Be container or the like.

In a further advantageous embodiment, it can be provided that a respective hydraulic motor together with egg nem respective flow control valve forms a structural unit in the form .ei nes hydraulic block. In such a common unit, the connected to the hydraulic motor flow control valve can be accommodated likmotors example in the housing of the hydra.

In a further advantageous embodiment may also be provided that both hydraulic motors with their respective flow control valve with

- a common pressure connection and / or

- a common return connection

are in communication, wherein the pressure and / or the return flow connection is arranged in particular on the support bracket or are. In this way, the serving to drive a respective distributor disc hydraulic motor Ren in the manner of a hydraulic parallel circuit can contact hy cially to be connected in particular in a simple manner to the hydraulic system of a tractor, such as a tractor or the like, or to its own hydraulic system the Zweischeibenstreuers to be closed, wherein the hydraulic motors can be controlled independently by means of ih res respective flow control valve independently of each other. The pressure and / or the return port is here before geous enough directly to the support bracket, so that easy accessibility is ensured. Unless the Zweischeibenstreuer ver does not have its own hydraulic system ver, the pressure and return connections zweckmäßi sarily each one arranged on the support bracket to include connecting piece, which, if necessary, simple and convenient manner to the hydraulic system of a tractor, such as a tractor or the like, can be connected by te only the connecting piece on the one hand for the Drucksei, on the other hand connected to the return to the corresponding terminals of the tractor.

In such a hydraulic parallel connection of the hydraulic motors including their associated Stromre gelventile may be provided in particular that

- One of the hydraulic motors with its respective flow control valve to the pressure port and the other hydra likmotor is connected with its respective flow control valve to the return port; or

- One of the hydraulic motors with its respective flow control valve is connected to both the pressure port and to the return port.

In both cases, a parallel connection of the Hyd raulikmotoren of the aforementioned type can be realized, in the former case, the pressure connection to a hydra likmotor, preferably at the hydraulic block, is arranged, while the return port to the other hydra likmotor, preferably at the hydraulic block arranged and both the pressure ports and the Rücklaufan connections of both hydraulic motors are in communication with each other, ie both hydraulic motors are in fluid communication both with the common pressure port (on the one hydraulic motor) and with the common return port (on the other hydraulic motor). In the last-mentioned case, both the pressure connection and the return connection are arranged on the one hydraulic motor, preferably on the hydraulic block thereof, while in turn both the pressure connections and the return connections of both hydraulic motors are in communication with one another, ie both hydraulic motors are connected both to the common men pressure connection (to the one hydraulic motor) and with the common return port (on the same hydra likmotor) in fluid communication.

In order to provide for a common fluidic contacting of both hydraulic motors and in particular a hyd raulische parallel circuit of the above type to ensure ge, are preferably - as already indicated - both hydraulic motors with their respective Stromregelven valve both on the pressure side and the return side by means of a connecting line with each other in Connection, wherein the connecting lines are arranged in particular in the interior of the support console and thus protected from external influences. In order to counteract an initially mentioned Schwingungsan movement of the connecting lines, they can be configured substantially rigid, wherein they may be formed in example of metal. However, the arrangement according to the invention of the flow control valves directly on a respective hydraulic motor admittedly also made it possible to carry out a customary design of the connecting lines in the manner of flexible hydraulic hoses, since any vibrations upstream of a respective flow control valve can be easily compensated or compensated for.

To the hydraulic motors even at temporarily insufficient input pressure, for example, if the distributor plates turn off immediately after switching off the hydraulic motors to a standstill, to protect from damage, in addition, each hydraulic motor with its respective flow control valve, a suction valve can be arranged in front of advantageous embodiment, which also in particular is integrated in the formed by a respective hydraulic motor together with a jewei time flow control valve assembly in the form of a hydraulic block. The expediently configured in the manner of a check valve Nachsaugventil is hydraulically connected in parallel to a respective hydraulic motor in parallel, so that it is ensured that a hydraulic fluid flow to the respective hydraulic likmotor is maintained when the input pressure drops to the hydraulic motor to a value below the return-side output pressure and opens the Nachsaugventil.

A respective flow control valve of a respective hydra likmotors may preferably on the one hand a pressure compensator, on the other hand, a throttle or expansion valve or Stetig valve, in particular in the form of a proportional, control and / or servo valve include, so that the flow of a hydraulic fluid even under changing load how un ferent speeds of the distributor disks and / or impacting on these mass flows of Verteilgut, wei kept constant as possible, but the speed of jewei time hydraulic motor independently controlled and / or can be controlled.

According to an advantageous development it can be provided that at least one, in particular exactly one, the two hydraulic motors with its respective flow control valve and preferably the Nachsaugventil further associated with a load pressure signaling system, which in particular also in the of this hydraulic motor together with its flow control valve formed unit is integrated in the form of a hydraulic block. Such, also referred to as "load-sensing systems" (LS systems) load pressure signaling systems are known as such and include a hy metallic control and / or regulation, the pressure and / or the flow rate of the hydraulic pump of the Hydrauliksys system the tractor or even the two-disc spreader itself, provided that it has its own hydraulic system, to which the hydraulic motors of the two-disc Spreader required operating conditions adjust assets, so that the hydraulic pump does not always have to work with maximum power, which otherwise caused high Leistungsver losses, which went hand in hand with an increased fuel consumption of the tractor. Consequently, due to the load-pressure-signaling system, the hydraulic pump of the towing vehicle must always provide only that volume flow of hydraulic fluid which is needed by the hydraulic motors of the two-disc spreader.

The load pressure signaling system is expediently connected to a separate, in particular likewise arranged on the Tragkonso le, load pressure signaling connection in connection, so that in this respect a simple and convenient connection of the load pressure reporting system of Zweischeibenstreuers is ensured to the tractor in that the load pressure signaling connection can be connected to a corresponding connection of the traction machine, provided that the tractor is equipped with such as is normally the case with modern tractors.

The load pressure signaling system expediently comprises, on the one hand, a circulation pressure compensator, on the other hand, an exchange valve which is effective between the pressure and return sides, in particular in the form of a proportional, regulating and / or servo valve, preferably in the form of a proportional pressure regulator. valve. The circulation pressure compensator is arranged on the pressure side of the hydraulic motor and the associated flow control valve and is in particular on the one hand to the pressure port, on the other hand with the return port in conjunction to be effective between the pressure and the return soap, either after hydraulic connection of the two disc spreader to the hydraulic system of a tractor or whether it is more or less permanent, provided that Double disc spreader has its own hydraulic system.

In order to avoid any vibration excitation of the hydraulic system in an effective manner, can be advantageously provided in this connexion that the changeover valve, e.g. in the form of a proportional pressure control valve, the load pressure signaling system with a control and / or regulating device is in communication, which in the case of occurrence of a vibration of the torque and / or the speed of at least one distributor disc controls the Wechselven valve such and / or regulates that the pressure of the load-signaling connection

- remains essentially constant; or

- oscillates with substantially the same frequency as the oscillation of the torque and / or the rotational speed of the at least one distributor disc, but with a phase shift of about 180 ° in contrast.

In this way, any pressure oscillations, wel che resulting in corresponding changes in the speed of Ver divisors, quickly dampen or compen Sieren by the control and / or regulating device of the two-disc spreader normal operation of the load pressure reporting system, which in the adjustment the pressure and / or the volumetric flow of the hydraulic pump of the hydraulic system to the operating conditions demanded by the hydraulic motors of the two-disc spreader interrupts, as soon as the control and / or regulating device has detected a vibration of the torque and / or the speed of the distributor disc (s), Instead, the shuttle valve, which is embodied, for example, as a proportional pressure regulating valve, activates or corrects the load pressure reporting system in such a way that the outlet pressure of the load pressure reporting terminal remains essentially constant or even with a pressure signal. Mean vibration of the torque and / or the speed of the distributor disc (s) has inverse vibration.

A respective distributor disk can be assigned therefore vorzugswei ^¬ se, a speed sensor and / or a torque sensor to detect the speed of a respective distributor disc independently. As speed sensors here are any known, preferably non-contact, sensors including those mentioned in the above cited EP 2 386 198 Bl in Be costume, which, for example, in an angle gear, wel Ches the output shaft of a respective hydraulic motor with a respective distributor disc bearing shaft verbin ^¬ det, NEN be used and Queen with an incremental sensor on at least one of the aforementioned wave interaction. The incremental encoder can have several re, eg up to 16 or more, increments on its circumference and can provide a high resolution. The sensors should preferably be on and off by means of a separate housing to exchange them without removing parts of the hydra liksystems and the drive train of the distribution discs easily and accurately positioned to use again. As torque sensors also come preferably before contact-free, sensors of any known type into consideration, such as magnetostriction sensors, as they are known as such, for example, from EP 2 625 945 Bl or EP 2 767 149 Bl.

The control and / or regulating device is expediently in connection with the speed sensor and / or with the rotational torque sensor of a respective distributor disk to detect the occurrence of vibration of the torque and / or the speed of a respective distributor disc and a such vibration, in particular by appropriate control and / or regulation of the selventils the load pressure signaling system in the above manner to compensate.

In addition, at least one of the two hydraulic ^¬ likmotoren with its respective flow control valve also be associated with a check valve, which in particular in the of this hydraulic motor together with his

Flow control valve and preferably the Nachsaugventil and possibly the load pressure signaling system Bauein formed unit in the form of a hydraulic block is integrated. The check valve is expediently the return side of the hydraulic motor and its flow control valve angeord net and in particular with the return port in connection to prevent hydraulic connection of Zweischei benstreuers to the hydraulic system of a tractor a return flow of hydraulic fluid from the return side to the pressure side.

As already indicated, the hydraulic motors are with their respective flow control valves and in particular the other hydraulic components, such as the Nachsaugventile, the load pressure message system, the check valve and the like, arranged inside the support bracket to protect it from external influences and before To prevent corrosion and mechanical damage.

The support bracket of the two-disc spreader can be designed preferably before preferably in the form of a U-profile, which at its open, e.g. lower side te, in particular by means of a protective grid, is closed.

Further features and advantages of the invention will become apparent from the following description of Ausführungsbeispie len with reference to the drawings. Showing:

Fig. 1 is a schematic perspective view of a Two-disc spreader without the drives of the splitter discs;

Fig. 2 is a schematic perspective view of

Supporting console of the two-disc spreader according to FIG. 1;

Fig. 3 is a schematic perspective view of the

Supporting console of Figure 2 from below with the herein housed drives the distributor disks according to a first embodiment.

FIG. 4 shows a schematic plan view of the support bracket according to FIG. 3 from below; FIG.

5 shows a schematic sectional view of the support bracket according to FIGS. 3 and 4 along the sectional plane V-V of FIG. 4;

Fig. 6 is a schematic view of a hydraulic circuit diagram of the hydraulic drive of the distributor discs of the two-disc spreader of FIG. 1 to 5;

Fig. 7 is a substantially corresponding to FIG. 3

schematic perspective view of a support bracket from below with the herein housed drives the distributor disks according to a two-th embodiment;

Fig. FIG. 8 shows a schematic top view of the carrying console according to FIG. 7 from below; FIG. and

9 is a schematic sectional view of the support bracket according to FIGS. 7 and 8 along the sectional plane IX-IX of FIG. 8th.

1 is an embodiment of a Zweischei benstreuers for spreading of powder or parti keiförmi- like distribution material, such as fertilizer, schematically as given, wherein the two-disc spreader is designed in the present case in the manner of an attachment, which can be picked up by the three-point linkage of a tractor, such as a tractor. The two-disc spreader comprises a frame 1, which receives a serving for storing the distribution goods container 2. The container 2 has, for example, two approximately funnel-shaped un th tapers sections 3, 4, which are equipped at its bottom with one, not visible in FIG. 1 metering, which, for example, one each, with a at the bottom of a respective funnel-shaped Section 3, 4 angeord Neten outlet opening co-operating metering slide to summarize, the metering independently STEU independently and are controllable. By means of the dosing, the distribution can be metered distributed to below the same arranged distributor discs 5, 6, sitting in each exchange bar on each approximately vertical and rotatably mounted shaft. The distributor discs 5, 6 are equipped with two or more spreader blades or blades 7, 8, which are also expediently interchangeable fixed to a jewei time distribution disc 5, 6 and the United divide on rotation of the distributor discs 5, 6 about zent rifugal drop. In order to change the spreading pattern as needed, can in the bottom area of each trichterförmi gene section 3, 4 each have a device for Ver position of the task point on a respective distributor disc 5, 6 may be provided, which on scales 9, 10 he is recognizable (see eg EP 2 057 876).

The frame 1, in the embodiment shown, two extending approximately in the direction of travel, outwardly swept C-profiles 11, 12, between which - again in

Viewed in the direction of travel - rear areas le 13 is used. The support bracket 13 is formed from a downwardly open U-profile, which at its lower side, for example by means of a protective grid (not shown), as well as at both ends by means of a flange 14, which at the same time for attachment of the support bracket 13 to the C Profiles 11, 12 serve the frame 1, is closed. In this way, interfaces can be formed, which allow the installation of support brackets 13 for any on types of operation for the distributor disks 5, 6. Thus, the distributor disks 5, 6 in the present case by a rotationally housed in the U-profile of the support bracket 13 hydraulic motor, which are connected to the Hydrauliksys system of a tractor, such as a tractor, and which number for controlling and / or regulating the speed the distributor discs 5, 6 are each independently assigned a flow control valve, as explained below in detail, wherein this hydraulic drive can be exchanged for example against an electric drive by the provided with the hydraulic motors support bracket 13 against a fitted with electric motors support bracket is replaced (not graphically Darge presents).

1, the inner walls 3a, 4a of the funnel-shaped sections 3, 4 of the container 2 facing one another form a roof 15 between them.

In each funnel-shaped section 3, 4 above the bottom provided with the outlet opening further circulates a not graphically reproduced agitator with approximately vertical agitator axis, the agitators can also be driven by means housed in the support bracket 13 hydraulic motors, for example in a rotary step movement, in the present case but also have an electric drive, also not shown. In Fig. 2 is a detail view of the support bracket 13 with its terminal flanges 14 schematically Darge presents, wherein the support bracket 13 at the top in Be rich their ends by a respective shaft 16, 17 interspersed, which is mounted inside the support bracket 13 and for rotationally fixed placement of the distributor disks 5, 6 is used. To the support bracket 13, for example, via one each in Fig. 2 unrecognizable and arranged on its front side in the direction of travel and thus easily accessible connecting pieces, corresponding hydraulic lines 20a, 21a connected, on the one hand to the pressure port, on the other hand to the return port of the hydraulic system a tractor, such as a tractor can be connected. While provided for connection to the pressure connection of the tractor hydraulic line 20a is connected to a common pressure port P of the support bracket 13, which is provided for connection to the return port of the tractor hydraulic line 21a with a common return port R of the support bracket 13 is connected (see further below with reference to Figs. 3 ff). The lines 20a, 21a can be substantially rigid, for example made of metal, or be formed by conventional hose lines. On the - viewed in the direction of travel - front side of the support bracket 13 may be mounted approximately centrally a mounting bracket 22, which receives a - here electric - drive 23 with an eccentric drive 24 for the agitators, so that on pa rallele tabs 25, 26th of the eccentric drive 24 each have the inner end of a pull or push rod of a Hebelgetrie bes (not shown) can connect.

As can be seen from FIGS. 3 to 5, inside the U-profile of the support bracket 13, the hydraulic motors 30, 31 associated with a respective distributor disk 5, 6 are arranged. accommodated, which can be configured eg as external gear motors or in any other known design NEN. The hydraulic motors 30, 31 are, for example hori zontal ^¬ and arranged transversely to the direction of travel in the region of opposite ends of the support bracket. 13 The torque of each hydraulic motor 30, 31 is transmitted via a respective angular gear 32, 33 on the respective distributor disc 5, 6 supporting shaft 16, 17, wherein Be rich in each angular gear 32, 33 for speed detection one or more speed sensors ( not ge shows) may be provided, which cooperates, for example with an incremental encoder with distributed on the circumference of the shafts 16, 17 increments, as it is known as such from the above-cited EP 2 386 198 Bl.

Further, at a respective angle gear 32, 33 a

Torque sensor may be provided (also not shown), such as a Magnetostriktionssensors, e.g. a fluxgate magnetometer. The speed and torque sensors are connected to a control and / or regulating device of the two-disc dispenser, wherein the signals taken by the sensors can also be transmitted to an operating terminal.

Each hydraulic motor 30, 31 is a further below with reference to FIG. 6 explained in detail Stromre gel valve 34, 35 associated, which is also in communication with the control and / or regulating device to the speed of the distributor discs 5, 6 regardless of egg being able to control or regulate one another. To periodic

Vibration excitations of the hydraulic system, as they can teilgutstromes during operation due to the cutting of the metered Ver through the spreader vanes 7, 8 of the distributor discs 5, 6 occur, is a depending Weil flow control valve · 34, 35 thereby in the immediate vicinity He associated hydraulic motor 30, 31 connected to this, in the present case, a respective hydraulic motor together with a respective flow control valve 34, 35 each form a unit in the form of a hydraulic blocks 36, 37 forms. The hydraulic blocks 36, 37, which each have the hydraulic motor 30 and its flow control valve

34 and the hydraulic motor 31 and its flow control valve

35, on the one hand with a common pressure port P, on the other hand with a common Rücklaufan connection R in combination, both of which are arranged on the support bracket 13 and by means of the pressure-side line 20a and the return-side line 21a (see also Fig. 2 ) on the one hand to the pressure port, on the other hand connected to the return port of the tractor hydraulics.

In order to fluidically contact both hydraulic blocks 35, 36 with the respective hydraulic motors 30, 31 and their flow control valves 34, 35 via the common pressure P or return connections R, these are each on the pressure side via a connecting line 38 as well as on the return side via a connecting line 39 to each other in Ver bond, the pressure and return side connecting lines 38, 39 disposed inside the U-profile of the support bracket 13 and in turn substantially rigid, eg made of Me tall, manufactured or can be formed by conventional hydraulic hoses.

In addition, in Figs. 3 to 5 a - in vorlie ing case in the immediate vicinity of the Rücklaufan circuit R arranged - load pressure reporting port LS of the support bracket 13 can be seen, which with a load pressure reporting system 40 (see 6), which is inte grated into a 37 of the two hydraulic blocks 36, 37 and serves the pressure or the flow rate of the hydraulic pump of the hydraulic system of a tractor to adapt to the requirements of the hydraulic motors 30, 31 of the two-disc stirrer operating conditions, so that the hydraulic pump of the tractor does not always have to work with ma ximaler performance. The load pressure reporting port LS may conveniently also be arranged on the Tragkon sole 13 and be connected via a load pressure message line 41 to a corresponding LS port of the hydraulic system of the tractor.

6 shows a schematic view of the hydra likschaltplans from which the fluidic contacts of the two each have a hydraulic motor 30, 31 and one flow control valve 34, 35 comprehensive hydraulic blocks 36, 37 are shown in detail. All are shown in FIG.

6 reproduced hydraulic components protected from external Einwir effects housed inside the U-profile of the support bracket 13.

As shown in Fig. 6 again in detail, the left in Fig. 6, dashed lines shown hydrau likblock 36 is connected via the common pressure port P to the pressure-side line 20 a, while the right in Fig. 6, also shown in phantom hydraulic block 37th via the pressure-side connecting line 38 is in communication with the same inlet pressure. Further, the right in Fig. 6 hydraulic block 37 is closed via the common return port R to the return side line 21 a, while the left in Fig. 6 hydraulic block 36 via the return-side connecting line 39 with demsel ben (low) return pressure is in communication. Each hydraulic block 36, 37 each includes one of the hydraulic motors

30, 31, which in the present embodiment, a respective Nachsaugventil 42, 43 is assigned, which is designed We sentlichen in the manner of a biased in the direction of the return side check valve. The after- Mouth valve 42, 43 is hydraulically connected in parallel to the hydraulic motor 30, 31 and arranged in a bridging bypass line 44, 45 this. It serves for

Protection of the hydraulic motor 30, 31 in the event of a temporarily insufficient inlet pressure, e.g. if the distributor discs 5, 6 after switching off the hydraulic motors 30,

31 to a stop to ensure that a hydraulic fluid flow to the respective hydraulic motor 30, 31 is maintained when the pressure-side A input pressure to the hydraulic motor 30, 31 drops to a value un below the return-side output pressure and the Nachsaugventil 42, 43 opens.

As can further be seen from FIG. 6, this comprises - on the pressure side of a respective hydraulic motor 30,

31 arranged - flow control valve 34, 35 of each Hyd raulikblockes 36, 37 in known manner each have a pressure compensator 46, 47, on the other hand throttle or Expansi onsventil or a Stetigventil 48, 49, which designed in vorlie lowing case in the form of a proportional valve is to the volume flow of the hydraulic fluid even with changing load, such as different speeds of the United divider discs 5, 6 and / or on these impinging Mas senströmen on Verteilgut, keep constant, but the rotational speed of each hydraulic motor 30, 31 and consequently each distributor disc 5, 6 nevertheless independently voneinan the taxes or be able to regulate.

The right in Fig. 6 hydraulic block 37 comprises an addition on the one hand via the pressure-side connec tion line 38 to the common pressure port P, on the other hand to the common return port R and further connected to the load pressure signal port LS, as "load -Sensing system "designated load pressure reporting system 40, which on the pressure side of the flow control valve 35 and the hydraulic motor 31 is arranged and has the Aufga ^¬ be, the pressure and / or flow of the connected via lines 20a, 21a and communicating with the load pressure signaling port hydraulic pump of the hydraulic liksystems a tractor to the current Betriebszu stood the hydraulic motors 30, 31 adapt. The load-sensing system 40 has for this purpose, on the one hand a circulating pressure compensator 50, on the other hand, designed in the present case in the form of a proportional pressure control valve shuttle valve 51, which are so hydraulically interconnected that between the pressure side and the Rücklaufsei ^¬ te effective circulation pressure compensator 50 via a load pressure line 52, which is ruled out at the load pressure reporting port LS sen, with the equally effective between the pressure side and return side shuttle valve 51 is connected. Last ^¬ res is also connected to the control and / or regulating device (not shown) in communication, which the shuttle valve 51 in the event of the occurrence of a detected by means of the above-mentioned sensors vibration of the torque and / or the speed of at least one distributor disc 5, 6 such controls and / or regulates that the pressure of the load-signaling terminal LS remains substantially constant or at substantially the same frequency as the oscillation of the torque and / or the rotational speed of the distributor disc (s)

5, 6, but oscillates with a phase shift of about 180 ° to the opposite, the LS-pressure consequently no longer adjusted accordingly in the case of speed and / or torque oscillations, but is compensated.

In addition, the right in Fig. 6, provided with the load-pressure-signaling system 40 hydraulic block 37 is equipped with a check valve 53, which is downstream of the hyd raulikmotors 31, that is arranged on the return soap, even in the case of a pressure side pressure drop always a return flow of the hydraulic fluid from the return side to prevent the pressure side.

While in the Ausfüh approximate shape shown in Fig. 3 to 6 each one of the hydraulic motors 30 via the respective hydraulic block 36 to the pressure port P and the other hydraulic motor 31 via the respective hydraulic block 37 is connected to the return port R, where in the hydraulic blocks 36th , 37 with their respective hydra likmotoren 30, 31 both the pressure side via the connecting line 38 and the return side via the Verbindungslei device 39 communicate with each other, the embodiment differs according to FIGS. 7 to 9 thereof essentially only in that the one Hydraulic block 37 with its respective hydraulic motor 31 both to the

Pressure port P as well as to the return port R is closed, but again the hydraulic blocks 36, 37 with their respective hydraulic motors 30, 31 both pressure side via the connecting line 38 and the return side via the connecting line 39 are in communication. The fluidic contacting is done in this case, success Lich on one and the same hydraulic block 37, which does not change the function.

A corresponding, not shown again hydraulic circuit diagram of the embodiment of FIGS. 7 to 9 un therefore differ from that of FIG. 6 only in that the pressure port P not on the left in Fig. 6, but as the return port R to the right in Fig. 6, provided with the load pressure signaling system 40 Hyd raulikblock 37 and connected via the connecting line 38 with the left in Fig. 6 hydraulic block 36 wä re. Incidentally, in FIGS. 7 to 9 identical and functionally identical components with the same reference numerals see ver and require no further discussion.

Claims

Patent Proverbs

1. Zweischeibenstreuer with two rotatably mounted distri lerscheiben (5, 6) and one, a respective Ver divider disc (5, 6) associated metering, wherein a respective distributor disc (5, 6) of a hydraulic motor (30, 31) is rotationally driven which

, For controlling and / or regulating the rotational speed of the Ver divider discs (5, 6) each independently

Flow control valve (34, 35) is associated, characterized in that the respective flow control valve (34, 35) of a respective hydraulic motor (30, 31) in immedi ately near a respective hydraulic motor (30, 31) is connected to this.

2. Zweischeibenstreuer according to claim 1, characterized marked

shows that the distributor disks (5, 6) are rotatably mounted on or in a support bracket (13).

3. Zweischeibenstreuer according to claim 1 or 2, characterized in that

- The respective hydraulic motor (30, 31) and / or

- The respective flow control valve (34, 35) of a respective respective hydraulic motor (30, 31)

is arranged on or in a support bracket (13) or are.

4. Zweischeibenstreuer according to one of claims 1 to 3, characterized in that a respective hydraulic motor (30, 31) together with a respective Stromre gelventil (34, 35) a structural unit in the form of a hydraulic raulikblocks (36, 37) forms.

5. Zweischeibenstreuer according to one of claims 1 to 4, characterized in that both hydraulic motors (30, 31) with their respective flow control valve (35, 36) with

- A common pressure port (P) and / or

- a common return connection (R)

are in communication, wherein the pressure (P) and / or the return port (R) is arranged in particular on the support bracket (13) or are.

6. Zweischeibenstreuer according to claim 5, characterized

draws that

- One (30) of the hydraulic motors (30, 31) with its respective flow control valve (31) to the Druckan circuit (P) and the other hydraulic motor (31) with its respective flow control valve (32) to the return flow port (R) is connected; or

- One (31) of the hydraulic motors (30, 31) with its respective flow control valve (37) to both the pressure connection (P) and to the return port (R) is connected.

7. Zweischeibenstreuer according to one of claims 1 to 6, characterized in that both hydraulic motors (30, 31) with their respective flow control valve (34, 35) on both the pressure side and the return side by means of a connecting line (38, 39) with each other in United bond , wherein the connecting lines (38, 39) are arranged in particular in the interior of the support bracket (13).

8. Zweischeibenstreuer according to one of claims 1 to 7, characterized in that each hydraulic motor (30, 31) further comprises a Nachsaugventil (42, 43), which in particular in the of a respective Hyd raulikmotor (30, 31) together with a respective flow control valve (34, 35) formed unit in the form of a hydraulic block (36, 37) is integrated.

9. Zweischeibenstreuer according to one of claims 1 to 8, characterized in that a respective flow control valve (34, 35) of a respective hydraulic motor (30, 31) on the one hand a pressure compensator (46, 47), on the other hand, a throttle or Stetigventil (47, 49), in particular in the form of a proportional, regulating and / or servo valve.

10. Zweischeibenstreuer according to one of claims 1 to 9, characterized in that at least one (31) of the two hydraulic motors (30, 31) further comprises a load pressure

Signaling system (40) is associated, which in particular in the of this hydraulic motor (31) together with its flow control valve (35) formed unit in the form of a hydraulic block (37) is integrated.

11. Zweischeibenstreuer according to claim 10, characterized in that the load pressure signaling system (40) with egg nem separate, in particular on the support bracket (13) to parent, load pressure signaling connection (LS) is in connec tion.

12. Zweischeibenstreuer according to claim 10 or 11, characterized in that the load pressure signaling system (40) on the one hand a circulation pressure compensator (50), on the other hand a between the pressure and return side effective exchange valve (51), in particular in the form of a Proportio nal, control and / or servo valve comprises.

13. Double disc spreader according to claim 12, characterized in that the shuttle valve (51) of the load pressure signaling system (40) is in communication with a control and / or regulating device which, in the event of occurrence of an oscillation of the torque and / or the speed of at least one distributor disc (5, 6) the

Shuttle valve (51) controls and / or regulates such that the pressure of the load-signaling connection (LS)

- remains essentially constant; or

- with essentially the same frequency as the

Oscillation of the torque and / or the speed of the at least one distributor disc (5, 6), but with a phase shift of about 180 ° in contrast, oscillates.

14. Zweischeibenstreuer according to one of claims 1 to 13, characterized in that a respective distri lerscheibe (5, 6) is associated with a speed sensor and / or a rotational torque sensor to the speed of each respective distributor disc (5, 6) independently to capture.

15. Zweischeibenstreuer according to claim 13 and 14, characterized in that the control and / or Regeleinrich device with the speed sensor and / or with the torque management element of a respective distributor disc (5, 6) in

Connection is to the occurrence of a vibration of the torque and / or the rotational speed of a respective Distributor disc (5, 6) to capture.

16. Zweischeibenstreuer according to one of claims 1 to 15, characterized in that at least one (31) of the two hydraulic motors (30, 31) further comprises a check valve (53), which in particular in the of this hydraulic motor (31) together with its flow control valve (35) formed unit in the form of egg nes hydraulic block (37) is integrated.

17. Zweischeibenstreuer according to one of claims 2 to 16, characterized in that the hydraulic motors (30, 31) with their respective flow control valves (34, 35) and in particular the other hydraulic components in the interior of the support bracket (13) are arranged.

18. Zweischeibenstreuer according to one of claims 2 to 17, characterized in that the support bracket (13) is designed substantially in the form of a U-profile, which is closed at its open side, in particular by means of a protective grid.