Agricultural harvesting machine

Abstract

Agricultural harvesting machine, in particular a forage wagon, with at least one working unit which can be driven by a drive train (14) from a tractor (5), wherein the drive train (14) comprises an input-side, central drive element (16) which can be driven by a cardan shaft (15) which can be coupled to the tractor (5), and at least one belt stage (17; 33) which bridges at least approximately half the machine width of the harvesting machine and extends transversely to the direction of travel (37) and transversely to the cardan shaft (15) from the said central drive element (16) to a transmission input element (20) of a transmission stage (21) arranged laterally on the harvesting machine, characterized in that the belt stage (17) comprises at least two driven pulleys (19, 31) which drive two separate, spaced-apart drive shafts (20;30), which extend parallel to each other and at least approximately parallel to the direction of travel, to drive two separate working units, wherein the two said driven pulleys (19, 31) are enclosed and driven by the same belt of the belt stage (17) or by two separate belts.;

Description

[0001] The present invention relates to an agricultural harvesting machine, in particular a loading wagon, with at least one working unit which can be driven by a tractor via a drive train, wherein the drive train comprises a cardan shaft which can be coupled to the tractor and which drives an input-side, central drive element of the drive train, and at least one belt stage.

[0002] In various harvesting machines, the working units are driven by a mechanical drivetrain from the tractor, to which a driveshaft is connected. This driveshaft powers a central, input-side drive element on the harvesting machine. This central drive element, which is connected to or driven by the harvesting machine end of the driveshaft, is usually located approximately in the middle of the harvesting machine frame or a connected support structure, so that the driveshaft can run at least approximately in the direction of travel towards the tractor.

[0003] To route the drivetrain from the central drive element, the driveshaft connection, to the working units, the drivetrain typically branches off laterally from the end of the driveshaft, continuing along the side of the harvesting machine to power the corresponding working units. In harvesting machines such as a forage wagon or a baler, the drivetrain can, on the one hand, power a collection device, which may include a pickup with a spiked roller and a downstream conveying rotor. By extending the drivetrain, further working units, such as a scraper floor or metering rollers at the rear of the harvesting machine, or elements of the bale forming chamber, can also be driven.

[0004] To route the drive train from the central drive element at the harvester-side end of the driveshaft to the side of the harvester and from there to the corresponding working units, angle gearboxes or T-gearboxes are typically used. For example, the aforementioned central drive element at the end of the driveshaft can be the input shaft of a T-gearbox or an angle gearbox, whose output shaft is then connected via another driveshaft to a lateral angle gearbox, from where the drive train is routed to the working units via further gear stages and driveshafts.

[0005] Such a forage wagon is shown, for example, in German patent DE 41 24 145 C2, where the laterally driven bevel gear drives a belt stage, which in turn drives the conveyor rotor between the pickup and the storage compartment of the forage wagon. A force sensor is attached to the belt tensioner of this belt stage, and its load signal is used by a control unit of the forage wagon to swing out the cutting unit and engage a scraper floor drive when the load is too heavy, and to disengage the tractor's power take-off drive if the load persists. The control unit also simultaneously takes into account pressure signals from the front wall and the rear door of the crop storage unit.

[0006] Similar loading wagons are also known from US 2014 0105710 A1 and DE 11 60 229 B, the former of which shows a combination of belt drive and chain drive to bridge the distance from the power take-off shaft to the lateral arrangement of the drive gearboxes.

[0007] Due to the various gear stages, such a drive train requires relatively complex maintenance with many lubrication points and bearings that are difficult to access. Furthermore, it results in relatively high manufacturing costs.

[0008] Another problem arises with such mechanical drive trains when different working units are driven, but these units are not always intended to run simultaneously. For example, the metering rollers of a forage wagon are not usually operated in sync with the rotor or spiked roller of the collection device. Similarly, the scraper floor drive is only engaged occasionally, while the collection rotor runs for extended periods. The resulting need to engage and disengage the clutches typically requires disengaging the tractor's power take-off (PTO) to allow for the use of simple, positive-locking clutches, as otherwise complex, friction-locking clutches would be necessary.

[0009] The present invention is therefore based on the objective of creating an improved agricultural harvesting machine of the aforementioned type, which avoids the disadvantages of the prior art and advantageously develops the latter further. In particular, a cost-effective, easy-to-maintain drive train is to be created that requires fewer parts and allows for simpler, more convenient switching on and off of the driven working units.

[0010] According to the invention, the aforementioned problem is solved by an agricultural harvesting machine according to claim 1. Preferred embodiments of the invention are the subject of the dependent claims.

[0011] It is therefore proposed to extend the drive train from the central drive element, which can form the PTO shaft connection of the harvester and is driven by the PTO shaft that can be coupled to the tractor, via a central belt stage that bridges the distance between the central drive element and the right or left side of the machine. According to the invention, the belt stage extends transversely to the direction of travel and transversely to the PTO shaft that can be coupled to the tractor, from the aforementioned input-side central drive element to a transmission input element of a gearbox arranged laterally on the harvester. Such a central belt stage, which can essentially still transmit the entire drive power of the PTO shaft before it is split to various working units, makes it possible not only to drive the angle or T-gear gearbox at the end of the PTO shaft, but also to drive the tractor's drive shaft.Not only can the drive shaft be saved, but overload protection for the entire drive train can also be achieved in a simple way, or, for example, the tractor can be prevented from stalling.

[0012] In particular, the aforementioned belt stage can rotate in an upright plane transverse to the direction of travel and have at least two pulleys with axes of rotation at least approximately parallel to the direction of travel, one of which can be arranged approximately centrally on a front section of the harvester and the other laterally on the harvester. Specifically, a pulley driving the belt stage can be mounted directly on a stub axle, which forms the aforementioned central drive element and can be directly coupled to the driveshaft leading to the tractor, so that the rotational speed of the driven pulley corresponds to the rotational speed of the driveshaft. The aforementioned driving pulley can be arranged coaxially with the output joint, more precisely with the output of the output-side joint half of the driveshaft, and / or coaxially with the driveshaft connection of the harvester.This eliminates the need for the usual angle or T-gear at the end of the driveshaft, requiring only a simple axle stub.

[0013] In principle, it would also be possible to provide a reducing or increasing gear stage between the aforementioned drive shaft and the belt stage, for example in the form of a spur gear pair.

[0014] The aforementioned belt stage can bridge at least approximately half the machine width of the harvesting machine.

[0015] Regardless of the aforementioned positioning and orientation of the belt stage, according to a further aspect of the present invention, it can also be used to easily decouple the drive train from the drive motion of the PTO shaft and / or to implement overload protection. Advantageously, the aforementioned belt stage can include an actively adjustable belt tensioner, which can be adjusted by a control device between a tensioned position, in which the belt stage is tensioned and the power flow is closed, and a disengaged position, in which the belt stage decouples the drive train from the transmission shaft leading to the tractor. If the belt tensioner is adjusted by the control device to the aforementioned disengaged position, the power flow between the driving pulley and the driven pulley is interrupted, so that even with the tractor's PTO shaft continuing to rotate, the drive train is not disengaged.Working units located downstream of the belt stage are shut down. The belt tensioner can be adjusted by means of a suitable actuator, for example in the form of a hydraulic cylinder, which can be controlled by the control device.

[0016] The aforementioned control device can, in principle, operate in different ways and / or implement overload protection in different ways.

[0017] In an advantageous embodiment of the invention, the control device can move the belt tensioner into the release position and thereby interrupt the power flow when a load on the drive train and / or a working unit driven by the drive train exceeds a predetermined threshold. Advantageously, a load sensing device can be provided for detecting a torque and / or a load on the drive train and / or a working unit, wherein the control device is configured to move the belt tensioner into the release position depending on a load signal from the load sensing device, which indicates that a load threshold has been reached and / or exceeded.

[0018] For example, the load detection device can detect a bearing support force and / or a bearing tilting moment with which a pulley of the belt drive is supported. This is based on the assumption that high loads on the drive train result in high loads on the pulley, and consequently, the bearing reaction forces and / or moments increase.

[0019] To facilitate measurement, one of the pulleys, particularly the driving pulley of the belt stage, can be movably mounted, for example, on a rocker arm or a swivel arm. The load sensing device can include a force sensor and / or a displacement sensor to measure the deflection force and / or displacement of the pulley, rocker arm, or swivel arm. The deflection of the pulley, or the corresponding movement of the rocker arm or swivel arm, increases with increasing load on the drive train, so that the deflection and / or deflection force can be used as a measure of the transmitted torque. For example, a force-measuring bolt can measure the force acting on the rocker arm.

[0020] Alternatively or additionally, the load detection device can also detect an actuating and / or reaction force on the adjustable belt tensioner and output a corresponding load signal, which can be used as a load and / or torque indicator.

[0021] If the corresponding load signal exceeds a predetermined threshold, the control unit can release the belt tensioner to prevent overloading.

[0022] Alternatively or in addition to such torque detection and torque-controlled belt tensioning, the control device can also be designed to operate depending on a slippage occurring at the belt stage.

[0023] Advantageously, a slip detection device can be provided for this purpose, which may have at least two speed sensors by means of which the speed of the driving pulley and the speed of the driven pulley of the belt stage can be detected. The control device mentioned can be designed to monitor a difference between the two speeds and / or compare it with a permissible threshold value. If the difference in speeds, and thus the slippage, becomes too large, the control device can release the belt tensioner mentioned.

[0024] In order to transmit the drive power from the drive shaft that can be coupled to the tractor, in particular from the aforementioned belt stage, to several working units, the further drive train can be designed in fundamentally different ways.

[0025] To drive a first working unit with a preferably horizontal drive shaft transverse to the direction of travel, an angle gear can advantageously be used. In order to simultaneously drive a second working unit spaced apart from the first, and to manage with as few parts as possible, an advantageous embodiment of the invention allows a pinion of the angle gear stage to comprise a continuous shaft which receives the drive power on the input side, drives an angle gear element, and then forms a drive element on the output side which serves to drive the second working unit.In particular, the said continuous shaft can have a drive pinion or wheel in a central section for driving the transversely extending bevel gear element and can have a torque-receiving section and a torque-emitting section at its opposite ends, wherein the said torque-receiving and torque-emitting sections can be formed, for example, by a splined shaft profile section or a rotationally fixed gear wheel or pinion.

[0026] When the harvesting machine is configured as a forage wagon, the aforementioned bevel gear can, in particular, drive a rotor of the collection device, which may be located downstream of a rotating spiked roller of the pickup. The through-shaft passing through the bevel gear stage can be driven on the input side by the previously described belt stage and, on the output side, for example, by metering rollers at the rear of the forage wagon or by another gear stage that is connected to the drive of said metering rollers.

[0027] By using such a bevel gear with through-drive, it can advantageously be sufficient if the aforementioned belt stage drives only one driven pulley and / or only one gear shaft is driven by the belt stage, thereby further simplifying the design of the belt stage. In particular, the belt stage can have only two pulleys and, optionally, the aforementioned belt tensioner.

[0028] Alternatively or in addition to such a side gearbox with through-drive, another working unit, in particular the metering rollers at the rear of a loading wagon, can also be driven by a separate branch of the drive train that does not pass through the side gearbox.

[0029] The aforementioned belt stage comprises two separate driven pulleys that drive two separate shafts, one of which can, for example, lead to an angle gear driving the rotor of the collecting device, and the other can lead to a further working unit or a gearbox connected thereto, in particular an angle gear, wherein the aforementioned further working unit can in particular be a rear-mounted metering device of a loading wagon.

[0030] Advantageously, the aforementioned belt stage comprises two driven pulleys, each of which can be arranged to rotate about approximately horizontal axes of rotation parallel to the direction of travel, with the two driven pulleys being positioned, in particular, on a right or left side of the harvesting machine. Advantageously, both driven pulleys can be positioned on the same side of the machine; however, it would also be conceivable to arrange the two driven pulleys of the belt stage on opposite sides.

[0031] For example, the two pulleys on the same side of the machine can be arranged approximately one above the other.

[0032] To achieve sufficient frictional engagement on both driven pulleys equally, a deflecting pulley can be provided between the two driven pulleys, which forces the belt on an S- or serpentine path around the two driven pulleys and the deflecting pulley in between.

[0033] To achieve a branching of the drive power and drive two separate drive shafts, the belt of the belt drive does not necessarily have to run sequentially around the two driving pulleys. According to one aspect of the invention, a second, separate belt stage is provided, which is driven by the first belt stage. In particular, the driven pulley of the first belt stage can drive a shaft on which the driving pulley of the second belt stage can be mounted, wherein said shaft, which drives the driving pulley of the second belt stage, can simultaneously be used as a transmission input shaft and / or as a driving shaft for the laterally positioned bevel gear for driving the first working unit.

[0034] When using such a second belt stage, the previously described belt tensioner, adjustable by a control device, can be located on either the first belt stage or the second belt stage. In the first case, a central shutdown or interruption of the power flow is achieved, allowing both working units to be switched off simultaneously, even while the tractor's PTO shaft is running. In the second case, i.e., with a belt tensioner on the second belt stage, the second working unit can be selectively switched off, even if the first working unit is still being driven by the first belt stage.

[0035] In an advantageous embodiment of the invention, both belt stages can also be switched between a power-transmitting and a non-power-transmitting position by means of such a belt tensioner, which is adjustable by a control device. This allows, on the one hand, a central shutdown of all working units and, in particular, also a central overload protection. On the other hand, for example, the metering drive of a loading wagon can be selectively switched on and off.

[0036] Alternatively or in addition to such a second belt stage, a further drive shaft leading to another working unit can also be driven by an additional angle gearbox.

[0037] The invention is explained in more detail below with reference to preferred embodiments and accompanying drawings. The drawings show: Fig. 1: A side view of an agricultural harvesting machine in the form of a loading wagon according to an advantageous embodiment of the invention, Fig. 2: A perspective view of the belt stage of the harvester's drive train made of Fig. 1, which is arranged between the cardan shaft connectable to the tractor and the angle gearbox for driving the rotor of the collecting device, Fig. 3: A front view of the belt stage of the drive train and its arrangement on a front of the harvesting machine from the preceding figures, Fig. 4: a sectional view along line AA in Fig. 3, Fig. 5: A partially cut-out side view of the harvesting machine from the preceding figures, showing the angle gear for driving the conveyor rotor and its through-drive for driving a rear-mounted metering unit, Fig. 6: a partially cut-out side view of the angle gear and its through-drive similar Fig. 5, wherein a clutch for switching the through-drive is arranged in one variant in the area of ​​the angular output, Fig. 7: a top view of the belt stage of the drive train similar to Fig. 3, wherein the belt stage comprises 2 driven pulleys for driving two separate shafts of the drive train, Fig. 8: A partial side view of the harvesting machine from the preceding figures, showing the two shafts of the drive train, which are driven by the belt stage according to Fig. 7 are powered, Fig. 9: A partial side view of the harvesting machine from the preceding figures, showing a branching of the drive train by means of a second belt stage, Fig. 10: A top view of the two belt stages on one front of the harvesting machine similar to Fig. 3, showing the two separate belt tensioners for the two belt stages, Fig. 11: a partial side view of the harvester showing a branching of the drive train by means of an additional spur gear drive, which is driven from the belt stage, and Fig. 12: A top view of the belt stage at the front of the harvester and the additional spur gear stage driven by it.

[0038] How Fig. Figure 1 shows that the agricultural harvesting machine 1 can be an implement that can be attached to a tractor 5 in order to be pulled or pushed by it. In particular, the harvesting machine 1 can be designed, for example, as a forage wagon or as a baler.

[0039] The harvesting machine 1 can comprise a machine frame 3, which is supported on the ground by a chassis 2, and can be coupled to the tractor 5 via an attachment device, in particular in the form of a drawbar 4.

[0040] The machine frame 3 mentioned above can, for example, support a crop storage unit 6, which may be bounded by side walls 9, a front wall 8 and a rear wall 10.

[0041] The harvesting machine 1 can include several working units that can be driven by a drive train from the tractor 5, as will be explained later.

[0042] In particular, the harvesting machine 1 can include a collecting device 12 for collecting crop material from the ground, wherein said collector 12 can in particular have a pickup with rotating spikes or a spiked roller and a subordinate conveying rotor 11, which can extend horizontally transversely to the direction of travel in order to convey the collected crop material into the crop storage container 6.

[0043] If the harvesting machine 1 is designed as a loading wagon, a scraper floor 7 can be provided as an additional working unit, by means of which harvested material collected in the harvested crop storage 6 can be transported to a metering device 13 at the rear of the harvested crop storage 6.

[0044] The scraper floor 7 and the metering unit 13, as well as the collector 12 including its conveying rotor 11, can advantageously be driven by a power take-off shaft of the tractor 5 via a mechanical drive train 14.

[0045] The aforementioned drive train 14 can initially comprise a driveshaft 15 extending from the power take-off shaft of the tractor 5 to a central drive element 16, which can be mounted approximately centrally on the front of the harvester 1, either on the machine frame 3 or on a support connected thereto. The aforementioned central drive element 16 can, in particular, be a stub shaft which, on the one hand, can form a driveshaft connection and be rotationally fixed to the driveshaft 15, and, on the other hand, drives a pulley 18 of a belt stage 17.

[0046] As the Fig. 2 and Fig. As shown in Figure 3, the aforementioned central drive element 16 can be located approximately in the middle of one front of the harvesting machine 1, for example above the collector 12, with the axle stub extending approximately parallel to the direction of travel.

[0047] The subsequent belt stage 17 can comprise one or more parallel belts that rotate around at least two pulleys, one of which drives the belt stage 17 and the other of which acts as the driven element. The two pulleys 18 and 19 can advantageously rotate around horizontal axes of rotation approximately parallel to the direction of travel, so that the belt stage extends in an upright plane transverse to the direction of travel and / or transverse to the longitudinal axis of the drive shaft 15.

[0048] In particular, the aforementioned belt stage 17 extends in an approximately horizontal orientation transverse to the direction of travel from the central drive element 16 to a section of the drive train 14 on one of the two left or right sides of the harvesting machine 1.

[0049] The two pulleys 18 and 19 can be arranged at approximately the same height, although this is not mandatory.

[0050] The driving pulley 18 can be arranged coaxially to the output-side end of the cardan shaft 15, in particular on the aforementioned drive stub which forms the drive element 16, and rotate at the speed of the cardan shaft 15.

[0051] The driven pulley 19 can drive a drive shaft 20, which can serve as the input shaft of a side gearbox 21 and / or can be connected to such an input shaft of the side gearbox 21, for example by a cardan shaft.

[0052] How Fig. 2 and Fig. As illustrated in Figure 3, the belt stage 17 advantageously comprises a belt tensioner 22, which is adjustable and can be adjusted by a suitable actuator in order to move, on the one hand, into a belt-tensioning position in which the force flow via the belt stage 17 is established, and on the other hand, into a relaxed position in which the force flow via the belt stage 17 is interrupted.

[0053] The aforementioned belt tensioner 22 can, for example, include a deflection pulley mounted on a pivot lever. A suitable actuator, for example in the form of a hydraulic cylinder, can be provided for adjustment.

[0054] To adjust the belt tensioner 22 between its tension position and its relaxation position, a control device 23 can advantageously be provided which can respond to various control signals and actuate the actuator.

[0055] To enable manual shutdown of the working units driven by the drive train 14, the control unit 23 can include a control signal input. This input allows a machine operator to send a manual signal – which can also be entered via voice control or similar means – to interrupt the drive train 14 and disconnect the working units from the drive shaft 15. By arranging the belt stage 17 upstream of the driven working units, the belt stage 17 can serve as a central clutch, allowing all working units to be shut down even while the drive shaft 15 continues to rotate.

[0056] Alternatively or additionally, the control device 23 can also include at least one automatic operating mode in which the control device 23 can adjust the belt tensioner 22, for example, depending on a torque prevailing in the drive train 14 or generally depending on a load on the drive train and / or on one or more working units. In particular, the control device 23 can be configured to move the belt tensioner 22 into its untensioned position, in which the power flow is interrupted, when a load and / or a transmitted torque reaches or exceeds a threshold value.

[0057] The load and / or the specified torque can be detected by a suitable detection device 24, which may, for example, have a force meter capable of measuring bearing forces acting on the bearings of at least one of the pulleys 18, 19.

[0058] In particular, the driving pulley 18, and optionally also the driven pulley 19, can be movably mounted, for example on a pivotable rocker or a pivotable bearing arm 25, wherein the detection device 24 can measure a deflection or a deflection force on the pulley, for example by means of a force measuring bolt or generally by means of a force meter or a displacement meter.

[0059] If the torque measured in this way exceeds a predetermined threshold, the control device 23 can move the belt tensioner 22 into its relaxed position to prevent overloading.

[0060] Alternatively or additionally, the control device 23 can also operate in slip-controlled mode. The detection device 24 can, for example, include two speed sensors that detect the rotational speeds of the two pulleys 18 and 19. If the difference between the rotational speeds of the two pulleys 18 and 19 exceeds or reaches a predetermined threshold value, the control device 23 can also actuate the belt tensioner 22 and move it into its relaxed position.

[0061] In principle, the control device 23 and the adjustment of the belt tensioner 22 can also operate depending on other operating parameters. For example, the load on the collector 12 and / or the metering unit 13 can be detected and, if necessary, summed up in order to move the belt stage 17 into its non-power-transmitting position depending on the load on one or more working units.

[0062] As the Fig. 5 and Fig. As shown in Figure 6, the drive train 14, particularly after the belt stage 17, can have a branching transmission to drive several working units. In particular, the aforementioned side transmission 21 can be designed as a branching transmission, especially in the form of a bevel gear, whose input shaft can extend in an upright plane approximately parallel to the direction of travel and whose output shaft can extend horizontally transversely to the direction of travel. For example, such a bevel gear can include a bevel gear stage or similar device.

[0063] In order to be able to drive a further working unit in addition to the working unit directly connected to the angle gearbox or side gearbox 21, the side gearbox 21 can advantageously be, as shown in the Fig. 5 and Fig. Figure 6 shows a through-drive that can include a shaft which receives torque on the input side, then drives the bevel or side gear 21, passes through it, and delivers torque on the output side. For example, the aforementioned through-drive shaft 26 can extend laterally past a gear wheel 27, for example in the form of a ring gear, which rotates the gear wheel 27 about a horizontal axis oriented transversely to the direction of travel and can, for example, drive the conveying rotor 11 of the collector 12.

[0064] The aforementioned torque-receiving and torque-emitting sections of the drive shaft 26 can extend on opposite sides of the transmission 21 and may, for example, be formed by a splined shaft section or other torque-transmitting coupling or transmission elements.

[0065] The torque-generating end of the drive shaft 26 can, for example, drive another shaft via a further cardan shaft 28, which is connected to the metering unit 13 or a metering unit gearbox and can, for example, form the input shaft of said metering unit gearbox. The metering unit 13 can, for example, have metering rollers at the rear of the crop storage unit 6. Accordingly, the drive train 14 leads from the side gearbox 21, which is arranged on one side of the harvester 1 in the area of ​​the pickup 12, to the rear of the harvester 1.

[0066] It would also be conceivable, however, that the output-side end of the through-shaft 26 drives the aforementioned scraper floor 7.

[0067] In order to be able to disconnect the second working unit, in particular the aforementioned metering unit 13, separately while the first working unit, in particular the conveying rotor 11, continues to be driven, the drive train 14 can have a coupling 29, in particular in the area of ​​the through-shaft 26, wherein such a coupling 29 can be arranged, for example, in the area of ​​the output side of the through-shaft 26, cf. Fig. 5, or also in the area of ​​the side gearbox 21, cf. Fig. 6.

[0068] Alternatively or in addition to such a through-shaft 26, by means of which drive power can be transmitted past or through the first working unit to a second working unit, the drive train 14 can also include a branch before the said first working unit and / or have a second, separate drive shaft 30 which can be driven by the belt stage 17.

[0069] How Fig. As shown in Figure 7, the belt stage 17 can, in particular, comprise two driven pulleys around which the belts of the belt stage 17 successively rotate. The additional pulley 31 can drive a second output shaft 30, which can lead past the aforementioned side gearbox 21 and thus past the first working unit to the second working unit, in particular to the aforementioned metering unit 13.

[0070] How Fig. As shown in Figure 7, the two driven pulleys 19 and 31 can both be arranged on one side of the harvesting machine 1 and / or one above the other and rotate about parallel axes of rotation. Advantageously, a deflecting pulley 32 can be provided between the two driven pulleys 31 to ensure a sufficient wrap angle and thus sufficient belt tension around the pulleys 19 and 31.

[0071] How Fig. As shown in Figure 8, the additional drive shaft 30 can, for example, be guided along the machine frame 3 above the side gearbox 21 to the metering unit 13.

[0072] Such an additional drive shaft 30 for driving another working unit can also be driven by means of an additional second belt stage 33, which can be directly connected to the cardan shaft 15 or the drive element 16 driven by it, but in particular can also be driven by the first belt stage 17.

[0073] As the Fig. 9 and Fig. As shown in Figure 10, the second belt stage 33 can include a driving pulley 34, which is driven by the driven pulley 19 of the first belt stage 17. For example, the two pulleys 34 and 19 mentioned can be mounted coaxially on the output shaft, which is driven by the pulley 19 and leads to the side gearbox 21.

[0074] The aforementioned second belt stage 33 can extend in particular on a left or right side of the harvesting machine 21, wherein the two pulleys of the second belt stage 33 can, for example, extend over each other - at least approximately - and wherein the second belt stage 33 can, for example, lead upwards from the driving end of the first belt stage 17.

[0075] How Fig. As shown in Figure 10, the second belt stage 33 can also include a belt tensioner 35, which can be adjusted in a similar or corresponding manner to the belt tensioner of the first belt stage 17, in particular depending on a torque and / or a load and / or a slip. The belt tensioner 35 allows the second belt stage 33, and thus the additional working unit connected to it, to be stopped independently of the operation of the first working unit.

[0076] As the Fig. 11 and Fig.As shown in Figure 12, the aforementioned additional drive shaft 30 for driving the additional working unit can also be driven via an additional spur gear stage or an additional spur gear transmission 36, wherein such a spur gear transmission 36 can be provided between the driven pulley 19 or the output shaft driven by it and the aforementioned additional drive shaft 30. For example, the aforementioned spur gear transmission 36 can comprise a set of meshing or rolling spur gears to bridge the distance between the two shafts.

Claims

[1] Agricultural harvesting machine, in particular a forage wagon, with at least one working unit which can be driven by a drive train (14) from a tractor (5), wherein the drive train (14) comprises an input-side central drive element (16) which can be driven by a cardan shaft (15) which can be coupled to the tractor (5), and at least one belt stage (17; 33) which bridges at least approximately half the width of the harvesting machine and extends transversely to the direction of travel (37) and transversely to the cardan shaft (15) from the said central drive element (16) to a transmission input element (20) of a transmission stage (21) arranged laterally on the harvesting machine, characterized by, that the belt stage (17) comprises at least two driven pulleys (19, 31) which drive two separate, spaced-apart drive shafts (20; 30) which extend parallel to each other and at least approximately parallel to the direction of travel, for driving two separate working units, wherein the two said driven pulleys (19, 31) are enclosed and driven by the same belt of the belt stage (17) or by two separate belts. [2] Agricultural harvesting machine according to the preceding claim, wherein the belt stage (17) extends in an upright plane transverse to the direction of travel (37) and rotates around at least two pulleys (18, 19) with axes of rotation at least approximately parallel to the direction of travel, one of which is arranged approximately centrally and the other laterally on the harvesting machine (1). [3] Agricultural harvesting machine according to one of the preceding claims, wherein a speed of the driving pulley (18) of the belt stage (17) corresponds to the speed of the cardan shaft (15), wherein said driving pulley (18) is arranged coaxially to the end end piece of the cardan shaft (15) and is fixed to rotation on the drive element (16). [4] Agricultural harvesting machine according to one of the preceding claims, wherein a connecting axis is aligned lying between the two pulleys (18, 19) of the belt stage (17) and / or the two pulleys (18, 19) are arranged approximately at the same height. [5] Agricultural harvesting machine according to one of the preceding claims, wherein the belt stage (17) comprises an actively adjustable belt tensioner (22) which is adjustable by a control device (23) between a tension position in which the belt stage (17) transmits torque and a disengagement position in which the belt stage (17) decouples the drive train (14) from the cardan shaft (15). [6] Agricultural harvesting machine according to the preceding claim, wherein a load detection device (24) is provided for detecting a torque and / or a load of the drive train (14) and / or a working unit driven thereby, and the control device (23) is designed to adjust the belt tensioner (22) to its untensioned position depending on a load signal from the load detection device (24) indicating that a load threshold has been reached and / or exceeded. [7] Agricultural harvesting machine according to the preceding claim, wherein the load detection device (24) is configured to detect a bearing support force and / or a bearing support moment on at least one of the pulleys (18, 19) of the belt stage (17). [8] Agricultural harvesting machine according to one of the two preceding claims, wherein at least one of the pulleys (18, 19), in particular a driving pulley (18), is movably mounted, in particular on a rocker or a pivot arm, and the load detection device (24) has a force sensor and / or displacement sensor for measuring a deflection force and / or a deflection distance acting on the movably mounted pulley, in particular the rocker and / or the pivot arm. [9] Agricultural harvesting machine according to one of the preceding claims, wherein a slip detection device (24) is provided for detecting slippage of the belt stage (17) and the control device (23) is designed to move the belt tensioner (22) into its untensioned position depending on a slippage signal from the slip detection device (38) indicating that a slippage threshold has been reached and / or exceeded. [10] Agricultural harvesting machine according to the preceding claim, wherein the slip detection device (38) has two speed sensors for detecting the speeds of the driving pulley (18) and the driven pulley (19) of the belt stage (17), wherein the control device (23) is configured to move the belt tensioner (22) into its untensioned position when a predetermined speed difference is exceeded. [11] Agricultural harvesting machine according to one of the preceding claims, wherein the two driving pulleys (19, 31) are arranged on the same side of the harvesting machine, in particular stacked one above the other and each rotate about axes of rotation that are at least approximately parallel to the direction of travel. [12] Agricultural harvesting machine according to one of the preceding claims, wherein at least one deflecting pulley (32) is arranged between the two driving pulleys (19, 31) such that the belt of the belt stage (17) runs in an S-shape or serpentine shape around the two driving pulleys (19, 31) and the deflecting pulley (32) arranged between them. [13] Agricultural harvesting machine according to one of the preceding claims, wherein in addition to the aforementioned belt stage (17) a second belt stage (33) is provided which can be driven by the first aforementioned belt stage (17), wherein a driving pulley (34) of the additional second belt stage (33) is connected in a rotationally fixed manner, in particular coaxially, to the driven pulley (19) of the first belt stage (17). [14] Agricultural harvesting machine according to the preceding claim, wherein the pulleys (34, 35) of the additional second belt stage (33) are arranged one above the other on the same side of the harvesting machine. [15] Agricultural harvesting machine according to one of the preceding claims, wherein the drive train (14) has at least one angle gear (21) which is driven on the input side by the at least one belt stage (17) and drives on the output side a working unit, in particular a conveying rotor of a collecting device (12), wherein said angle gear (21) has a through-drive shaft (26) which passes through the angle gear and can be driven on the input side by the belt stage (17) and is designed on the output side to drive a further working unit, in particular a metering device. [16] Agricultural harvesting machine according to one of the preceding claims, wherein the drive train (14) comprises at least one bevel gear (21) which can be driven on the input side by the at least one belt stage (17) and drives on the output side a working unit, in particular a conveying rotor (11) of a collecting device (12), wherein the bevel gear has a through-drive formed by a separate input shaft and a separate output shaft, each of which is in drive engagement with a gear element (27), in particular a bevel gear, which rotates about an axis of rotation transverse to the two shafts and drives the said working unit. [17] Agricultural harvesting machine according to one of the preceding claims, wherein at least a collecting device (12) with a conveying rotor (11) rotating about a horizontal axis oriented transversely to the direction of travel and a metering device (13) are provided as working units, both of which can be driven via the aforementioned at least one belt stage (17).

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