• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    EXTRACT The present invention relates to an agricultural coupling implement, for example in the form of a hay-collecting machine, with a machine frame which can be pivotally mounted on a tractor about an upright drawbar axle, as well as a carriage with at least one steerable wheel, which is bearably mounted on an axis leg about an upright steering axle relative to the machine frame, wherein a steering actuator for adjusting the wheel and an adjusting device for adjusting the steering angle transmission of the steering actuator are provided. According to the invention, the steering actuator for adjusting at least one carriage wheel comprises a double-acting steering cylinder, preferably under hydraulic bias, which is coupled to a steering lever of the axle's leg of the wheel, the adjusting device being an adjusting actuator for adjusting the distance. from the coupling point of said steering cylinder to the steering lever of the steering axle's axle leg.
    公开号:NL2015453A
    申请号:NL2015453
    申请日:2015-09-17
    公开日:2016-08-24
    发明作者:Jungwirth Michael
    申请人:Alois Pöttinger Maschf Gmbh；
    IPC主号:
    专利说明:

    P32521NLOO / KHO
    Short description: Agricultural coupling tool.
    The present invention relates to an agricultural coupling implement, for example in the form of a hay collection machine, with a machine frame which can be pivotally coupled to a tractor about an upright drawbar axle, as well as to a carriage with at least one steerable wheel attached to an axle leg is mounted about an upright control shaft with respect to the machine frame, a control actuator for adjusting the wheel and an adjusting device for adjusting the steering angle transmission of the control actuator being provided.
    With agricultural coupling implements such as hay-collecting machines, for example in the form of windrows, the carriage of the coupling attachment is often used both during operation and during transport by road, whereby different loads and requirements often act upon the carriage here. In circular rakes, for example, during road operation, the rake rolls are pivoted upwards in a transport position, while during operation, they are pivoted downwards by associated support tools under the rake rolls. As a result, but also due to different ground or road conditions, different requirements are imposed on the vehicle and its controls. While operating at higher speeds over the road, as smoothly as possible, trailing driving behavior is desired, higher operating maneuverability and smaller turning circles are required in operational operation at often lower speeds. In addition, during operation, the hitching tool may have little "track deviation" or must travel as far as possible in the middle of the track of the tractor, in order to fully utilize the working width of the hitching tool as much as possible, or to offset staggered edges or the tracks. from previous or subsequent work aggregates. Furthermore, different farm steering characteristics may also be desired in the farm on the land itself, for example the highest possible maneuverability in turns in cases with partially raised working units.
    So far, it has already been proposed that the steering aggressiveness, that is to say the transmission ratio of the steering actuators, be adjustable in the case of steerable carriages of coupling implements, in order to obtain, for example, a larger wheel deflection of the coupling coupling vehicle in the actual operating operation. The steering angle of the machine frame relative to the tractor, as well as the hinging of the machine frame about an upright drawbar axis with respect to the tractor can usually be taken into account, which is picked up directly, for example, by a coupling head pivotable with respect to the machine frame and can be converted into a mechanical adjusting movement.
    Such a mechanical provision of the steering movement of the hitch-carriage vehicle shows, for example, publication DE 103.17.812 A1, in which the hinging of the hitching frame relative to the machine frame is converted into a sliding movement of a steering rod, which in turn is a steering rod hinges. This hinged steering rod is connected by track rods to the steering levers of the axle legs of the coach wheels, such that a hinging of the steering rods is converted to a wheel movement. This steering aggressiveness or the transmission ratio of the steering device can be changed here, because the coupling point of the steering rod can be shifted over the aforementioned steering rod by a hydraulic cylinder, such that the steering rods selectively obtain a larger or a smaller lever arm on the steering rod and correspondingly sliding movements of the control rods can be converted once into a larger and once into a smaller pivotal movement of the control rods. Said adjusting cylinder must in this case be controlled by the pressure level of the pick-up, in the case of a lifted pick-up, that means, during preparation and operation by road, a greater steering aggressiveness and greater wheel deflection of the hitching-carriage and when the pick-up is lowered , that means a smaller steering aggressiveness and smaller steering results are achieved during a company that actually works.
    However, this previously known adjustability of the control aggressiveness is disadvantageous in several respects. On the one hand, the fixed dependence on the steering aggressiveness of the pick-up position and the corresponding driving ratio that can be achieved is not equally desirable for all operating situations, whereby, for example, too strong steering aggressiveness during transport by road is negative. On the other hand, the steering device as a whole is complex and consists of many parts, such that the drive train of the steering device is maintenance-sensitive and tends to knock out or play due to wear and hence inaccurate steering.
    The present invention has for its object to provide an improved agricultural coupling implement which avoids the disadvantages of the prior art and ultimately further builds on in an advantageous manner. In particular, with a simply constructed steering device, direct and accurate steering must be possible and a reliable driving behavior in road traffic must be obtained.
    According to the invention, the stated object is achieved by an agricultural coupling implement according to claim 1. Advantageous embodiments according to the invention are the subject of the dependent claims.
    Furthermore, it has also been proposed to abandon the purely mechanical acquisition of the steering movement and to hydraulically effect the steering of the axle legs carrying the wheels. According to the invention, the steering actuator for adjusting the at least one carriage wheel comprises a double-acting steering cylinder, preferably under hydraulic bias, which is coupled to a steering lever of the axle leg of the wheel, the adjusting device comprising an adjusting actuator for adjusting the distance of the coupling point of the said adjusting cylinder on a steering lever from the steering axis of the axle leg. By setting the operating distance of the steering cylinder coupling point from the steering shaft, the steering cylinder obtains a different lever arm for pivoting the steering lever, such that the steering transmission can be changed. To adjust the wheel, a hydraulic cylinder also acts directly on the steering lever, which is provided on the axle leg of the wheel to be steered. As a result, various parts of a mechanical control drive such as, for example, a central control rod, such as it is applied in DE 103.17.812 A1, or the control rods, which extend from the coupling stand on a front end of the machine frame to the control drive, which is mounted on a rear end of the machine frame is saved. Moreover, by hydraulically adjusting the axle legs by means of a hydraulic cylinder coupled to its steering lever, a greater degree of freedom can be obtained when setting up the steering module and a lighter energy source, because a mechanical steering train from the coupling stand to the carriage is no longer taken into account. need to be. In addition, the number of moving parts and the number of controls can be reduced, thereby reducing the occurrence of steering play and inaccurate steering behavior due to wear.
    Depending on the design of the steering cylinder, it can be coupled to the steering lever of the axle leg with a piston rod or a cylinder part, for example by coupling to a piston rod end or cylinder end or cylinder collar.
    In order to be able to adjust the distance from the steering cylinder's coupling point to the steering lever from the steering axle's axis, the said steering leg's steering lever can have a guide, for example in the form of slotted holes, along which the steering cylinder's coupling point can be mounted on the steering lever. be shifted so that the distance from the steering axle changes. Instead of a slotted hole or a nut, the said guide can also comprise, for example, a steering ball which can be slid on a rod, to which the steering cylinder is coupled. Other embodiments for the guidance are possible.
    The above-mentioned guide may in principle have a different contour, for example in the form of a straight transverse to the longitudinal direction of the steering cylinder. In a further advantageous embodiment according to the invention, the said guide, however, has a curved course which, viewed from the control cylinders, is concave curved. In particular, in the case of a wheel which is not set in the neutral position for a straight-ahead travel, the guide may lie against the machine frame in the area of the coupling point of the steering cylinders, in particular with said coupling point on the machine frame. As a result, when the steering characteristic is set, a sliding of the coupling point on the side of the steering lever of the steering cylinder along the guide can also prevent a steering deflection by shifting the coupling point, at least when the carriage or the steerable wheel moves in a neutral position for straight-ahead driving. The operation of the adjusting device has no influence on its steering angle at least at the straight-ahead position of the carriage wheels.
    The steering cylinder can in principle also have a sliding coupling point on the machine frame, whereby a corresponding guide can also be provided here. However, an adjustability of the steering cylinder's coupling point to the steering lever of the axle leg can provide a stronger adjustment of the steering aggressiveness and, if taken alone, is sufficient, because a larger change in the lever ratio can be obtained on the steering lever. . The coupling point of the steering cylinder on the machine frame can, in so far as it forms a fixed coupling point, which cannot be moved or shifted on the machine frame. In a further embodiment according to the invention, the said coupling point of the control cylinder on the side of the machine frame must not be provided against a structural part or bearing part of the machine frame itself, but a steering support part connected thereto may be, for example, in the form of a carrier or a flange be provided that may preferably be rigidly secured to the machine frame.
    By supporting the steering cylinder on the one hand against a machine frame fixed coupling point and on the other hand against the steering lever of the axle leg, a direct control of the steering can be obtained and the steering forces can be absorbed directly on the machine frame with a favorable force path. In the interaction with a hydraulic pre-tension of the steering cylinders, the pistons of which can be operated from both sides with a sufficient pre-tension pressure, an indirect, undesirable post-acting steering behavior is hereby avoided.
    The steering cylinder can in principle be of different designs, for example consist of a cylinder and a piston rod. In a further embodiment according to the invention, the control cylinder can also comprise two piston rods, each with a piston, which are slidably accommodated in a common cylinder and can be moved back and forth from or into the cylinder on opposite sides. With such a double-piston rod embodiment, a sufficient adjustment path can be realized with compact dimensions, wherein little space is required in particular for the coupling points due to the slim piston rod contour.
    In a further embodiment of the invention, the adjustment of the coupling points of the steering cylinders to the steering lever of the axle leg can be achieved by means of an adjusting cylinder which can also be hydraulically operated.
    The control of the said adjusting cylinders for adjusting the steering aggressiveness can in principle be provided in various ways and ways. If the coupling implement is designed, for example, as a hay-collecting machine with at least one liftable rake reel, then the control cylinder can be controlled in dependence on the position and / or the operating condition of the rake reel, for example such that when the rake reel is raised the preparation and / or transport position of the adjusting cylinder is brought into a different position than when the rake roll has been lowered into its working position. In this case, the control cylinder for the control characteristic can be coupled in dependence on the actual position of the reel roll, for example, because the oil forced out of a lifting cylinder for lifting the reel roll is delivered into the adjusting cylinder in the case of a master-slave control. But alternatively the control of the adjusting cylinder can also take place in dependence on the control and / or on the energy supply of the lifting device of the raking roll, for example such that a hydraulic cylinder provided for lifting the raking roll is also applied to the adjusting cylinder. delivered such that the adjusting cylinder already performs or begins its adjusting movement when pressure is exerted on the extension cylinder and the lifting movement of the rake roll is only started or initiated.
    Alternatively or additionally to such a coupling of the adjusting cylinder for adjusting the steering characteristic at the working and / or preparation and / or transport position of a working unit of the coupling tool, the control of the adjusting cylinder can also be of a different type of steering are provided. The adjusting device can be switched, for example, into a operating mode, whereby manual control of the steering tool from the tractor is possible. This is simply possible by the use of the hydraulic steering cylinder, because, for example, a pressure supply from the tractor can be provided by a suitable steering valve on the steering cylinder. Alternatively or additionally and such a manual and / or freely selectable operating mode with control capability from the tractor, however, an operating mode can also be provided, wherein the steering cylinder can be controlled depending on the other operating parameters of the tractor and / or the coupling tool , for example in dependence on a driving speed, for instance such that with increasing driving speed an increasingly softer steering characteristic with smaller steering results is provided.
    In order to enable, on the one hand, agile and sensitive operation on land, but on the other hand to enable tracking, reliable transport by road, in a further embodiment of the invention the adjusting device can be designed such that the steering cylinder or its coupling point for transport by road is driven into a position that provides for less aggressive steering or a softer steering with smaller steering results, and / or a more aggressive steering characteristic is set for the land and / or work operation, whereby larger insertion angles are provided on the coupling implement . The adjusting device can provide such a changeover semi-automatically or fully automatically and perform in dependence on different operating parameters, for example in dependence on the driving speed and / or in dependence on the position of a working unit of the coupling tool. An elevated position of the working unit can, for example, be a signal for a soft transport over the road - steering characteristic and a lowered working unit can serve as a signal for an application of more aggressive, highly steering steering characteristic.
    Said adjusting cylinder for adjusting the coupling point of the steering cylinder can, in a further advantageous embodiment according to the invention, be arranged integrally in the steering lever of the axle leg and / or of said axle legs, for example such that the adjusting cylinder on the one hand is connected to the coupling point of the steering cylinder. the steering cylinder or the steering cylinder itself is coupled and on the other hand is coupled to the steering lever and / or the axle leg. Advantageously, said adjusting cylinder can extend with its longitudinal axis approximately parallel to the longitudinal axis on the control lever, to which the control cylinder is coupled. A compact, space-saving arrangement of the adjusting cylinders can hereby be obtained.
    Said adjusting cylinder can thereby be moved back and forth in a simple manner between two end positions, for example by the fact that the guidance of the coupling point of the steering cylinders comprises end stops against which the adjusting cylinder of the coupling part of the steering cylinder moves. In an alternative embodiment, however, the adjusting cylinder can also be moved to intermediate positions and be permanently arranged and / or infinitely adjustable, such that the steering characteristic can also be changed gradually or continuously by taking intermediate positions, for example on "half or" three-fourths ". This can be achieved, for example, by suitable switching, control and / or blocking valves, with the aid of which the supply and / or discharge of the adjusting cylinders can be opened and closed.
    In order to be able to adjust the steering movement of the carriage wheel to the steering movement of the coupling tool relative to the tractor, the angular position of the machine frame relative to the tractor with respect to pivotal movements about the drawbar axis can be engaged, e.g. by means of an angle sensor or other suitable recording device. An electronic control device such as, for example, a task calculator can control an electro-hydraulic control means, such as, for example, a valve arrangement, depending on the angular signal.
    Alternatively or additionally, the steering of the machine frame relative to the tractor can also be directly converted to a hydraulic adjusting movement or the supply of hydraulic pressure and quantity, for example, because said hinge movement is engaged with a hydraulic cylinder. To this end, the hydraulic cylinder can be coupled to the machine frame and to a coupling piece following the tractor movement such that pivotal movements of the machine frame relative to the tractor are converted in length changes to said hydraulic cylinder. The oil displaced by the said hydraulic cylinder can then be delivered to the steering cylinder as a quantity of adjusting oil. As a result, a hydraulic coupling, for example in the form of a direct hose connection or a replacement hydraulic connection with intermediate connection, can be provided with displacement cylinders.
    In a further advantageous embodiment according to the invention, said pilot cylinder, which engages the hinging of the machine frame relative to the tractor, can be integrated in a coupling stand or accommodated in the area of such a coupling stand, on which on the one hand the machine frame about the drawbar axis is hinged to the hinges and, on the other hand, can be coupled to the tractor itself. Advantageously, said pilot cylinder may be disposed transversely to the direction of travel against said coupling head, said pilot cylinder having on the one hand a coupling point on the coupling head and on the other hand having a coupling point on a lever connected to the machine frame, such that pivotal movements of the machine frame with respect to the coupling stand are converted into a change in the length of the pilot cylinder.
    The invention is explained in more detail below with reference to a preferred exemplary embodiment and associated drawings. Show in the drawings:
    Fig. 1: a top view of an agricultural coupling implement in the form of a hay-gathering machine designed as a swath rake and comprising two reels arranged to the right and left of a central machine frame and a carriage supporting the machine frame with steerable wheels
    Fig. 2: a top view, enlarged in cross-section, of the carriage of the coupling tool of Figs. 1 shows the steering cylinder directly connected to the steering lever of the axle leg of a wheel, the adjusting cylinder for adjusting the coupling point of the adjusting cylinder on the steering lever and the track rod between the two steering levers of the two wheels,
    FIG. 3: a further enlarged sectional top view on the steering lever of the axle leg of a wheel, the steering cylinder coupled to this steering lever and the adjusting cylinder coupled to the steering lever for adjusting the coupling point of the steering cylinder,
    FIG. 4: a perspective view of the arrangement of the steering cylinders and of the axle leg, to which the steering cylinder's steering lever is coupled, from an angle of incidence that is approximately backwards against the direction of travel, and
    FIG. 5: a schematic top view of the pilot cylinder mounted against the coupling head of the coupling tool of the preceding figures, which is rotated lengthwise during rotation of the machine frame about the drawbar axis with respect to the coupling head and a corresponding amount of adjusting oil for adjusting the steering cylinders.
    As Figure 1 shows, the hay-collecting machine 1 designed as a swath rake can be designed as a coupling tool, which can be attached to a tractor 2 on a rear side or, where appropriate, on a front side.
    The aforementioned hay-collecting machine 1 can herein comprise two work rotors 3 in the form of rake rolls 4, which in a manner known per se can in each case comprise several tools in the form of rake teeth 5, which are fixed to tooth-carrying arms 6, radially relative to a rotor hub. 7 protrude. Said tooth carrier arms 6 here extend over a rotary shaft 8 defined by the rotor hub 7 and standing up in the working position and are rotated by their circumference in a manner known per se cyclically about their longitudinal axes such that the rake teeth 5 attached to it walk around cyclically down to the ground and be hinged away from the ground.
    Said rollers 4 can be suspended from supporting arms 9, which can protrude through a central machine frame 10 transversely to the direction of travel. Said carrying arms 9 can advantageously be hingedly coupled to the machine frame extending substantially in the direction of travel and, for example, can be hinged upwards over horizontal bearing arm pivot axes 13, in the appropriate case also about a common bearing arm pivot axis 13. , to be able to bring the rake roll 4 into a preparation and / or transport position.
    The lifting of the rake arms 9 and hence the rake rollers 4 can be effected by a lifting device 11, which can comprise lifting actuators 12, for example in the form of hydraulic cylinders, which in each case can pivot up a bearing arm 9, preferably in a stepless manner. partially and / or obliquely raised preparation position and a substantially perpendicular or upright transport position, respectively.
    As shown in FIG. 1, the machine frame 10 can be supported by means of a carriage 14 on a bottom which, for example, can be arranged behind the rakes 4 in the direction of travel.
    Said carriage 14 can herein only comprise one wheel or two wheels 14 arranged transversely of the direction of travel to the right and left, which support the machine frame 10 and thus a part of the weight of the hay-collecting machine 1 on the ground. Said wheels 15 are in each case steerable about an upright steering axle 16 or collapsible with respect to the machine frame 10, wherein the wheels 15 can in each case be mounted on an axle leg 17 which is rotatable about said upright steering axle 16 on a transverse support 18 of the machine frame 10 is journalled. As shown in FIG. 4, the aforementioned axle leg 17 can deviate from the vertical, such that said steering shaft 16 does not have to be exactly vertical, but extends roughly upstanding.
    The said axle legs 17 each comprise a steering lever 19, which is rigidly connected to the axle leg 17 and rotatable therewith about the steering axle 16, such that by pivoting the steering levers 19 the rotation of the axle legs 17 and thereby the steering adjustment of the wheels 15 can be achieved.
    For adjusting the wheels 15, that is to say for steering, a steering cylinder 21 is provided as an adjusting actuator, which steering cylinder 21 is steerably coupled on one of the steering levers 19 and on the other steerably on the machine frame 10 or a rigidly connected structural part. As shown in FIG. 2, said control cylinder 21 can extend approximately transversely to the direction of travel and / or approximately to the longitudinal direction of the machine frame 10. The steering cylinder 21 can be designed in different ways, for example in the form of a double-piston cylinder unit, which can comprise two piston rods, each slidably accommodated in a common housing, which rods can be inserted and output on opposite sides of the cylinder, such as, for example, in Figure 3 is shown.
    To enable accurate, direct-acting steering, said steering cylinder 21 can preferably be of double-acting design and be under hydraulic bias, such that the effective length of the steering cylinders 21 can be accurately defined hydraulically. Advantageously, each of the two piston rods is thereby designed to be double-acting and prestressed. It will be clear, however, that otherwise as in principle shown in the figures, a steering cylinder with only a single piston rod can also be provided.
    The coupling point 22 lying on the side of the machine frame can be fixed or fixed to the machine frame, wherein the coupling point can of course be steerable to enable pivoting of the control cylinder 21.
    The coupling point 23 of the steering cylinder 21 on the control lever 19 can be slidable or adjustable, such that the distance of the coupling point 23 can be changed by the steering shaft 16 of the axle leg 17, in order to be able to vary the aggressiveness of the steering action of the steering cylinders 21. .
    As shown in FIG. 3, a guide 24 can be provided on the control lever 19, along which the coupling point 23 of the control cylinder 21 can be shifted relative to the control lever 19. Said guide 24 can be designed, for example, in the form of a slotted hole or slotted hole lining, in which a control bolt 25 forming the coupling point 23 can be shifted.
    Said guide 24 here extends transversely to the longitudinal direction of the steering cylinders 21 and / or at least approximately on the steering shaft 16 towards and away from the path and / or approximately parallel to the longitudinal direction of the steering lever 19 .
    In particular, the guide 24 can here define a slightly curved or curved guide path, which has the aforementioned embodiment over the longitudinal direction. The guide path defined by the guide 24 can in particular be curved in an arc of a circle, with a center of curvature at a neutral position of the wheels 15 for a straight configuration at least approximately with the coupling point 22 of the control cylinder 21 on the side of the control cylinder. machine frame can coincide. Due to such a curved design, the adjustment of the coupling point 23 of the steering cylinder 21 for adjusting the steering characteristic does not result in a direct steering adjustment, at least not at the moment that the adjustment in the non-steered neutral position of the wheels is straight ahead. lining.
    The adjustment of the coupling point 23 of the steering cylinders 21 can be effected by means of an adjusting cylinder 26 of an adjusting device 27, which can be designed as a double-acting hydraulic cylinder.
    Said adjusting cylinder 26 can herein be hydraulically coupled to the lifting device 11 for lifting the reel rolls 4, such that when operating said lifting device 11 or lifting the reel rolls 4 respectively, a set of the adjusting cylinders 26 and hence a set of the steering characteristic takes place. In particular, the attachment of the adjusting cylinder 26 to the lifting device 11 can be provided in such a way that when the reels 4 are lifted in the transport position, the coupling point 23 is moved further away from the steering shaft 16 in order to obtain a softer steering characteristic, and / or when the rake rolls 4 are lowered in the working position of the coupling point 23 towards the steering shafts 16, in order to make the steering more aggressive, that is to say that with a predetermined adjusting movement of the steering cylinders 21 a stronger steering deflection of the wheels 15 becomes provided.
    The adjusting cylinder 26 can advantageously be provided on the control lever 19, in particular have a coupling point 28 fixedly provided on the control lever, the adjusting cylinder 26 on the other hand being controlably connected to the coupling point 23 of the steering cylinder 21 and / or directly to the steering cylinder 21 could be.
    Instead of the coupling points 28 fixedly located on the steering lever and described above, it could also be conceivable to couple the adjusting cylinder 26 to the steering shaft 16 or to a part of the axle leg 17. Advantageously, however, the said adjusting cylinder 26 can also extend parallel to the longitudinal direction of the control lever 19 in a horizontal arrangement, so that an overall compact construction is obtained. When a coupling point 28 is provided on one of the coupling points 23 of the steering cylinder 21 opposite the part of the steering lever 19, the adjusting cylinder 26 can extend approximately over the steering shaft 16 or extend on both sides therefrom, such that the available building space is optimally utilized.
    As shown in FIG. 2 shows the pivotal movement of the steering lever 19 by a track rod 29 on the steering lever 19 of the other wheels. Said track rod 29 is steerably coupled to the two control levers 19 of the two axle legs 17 of the two wheels 15.
    The actual steering movement is provided by length adjustment of the steering cylinders 21. The supply and discharge of the hydraulic fluid required for this purpose in and from the control cylinder 21 can be controlled by means of a pre-control cylinder 30, which can be provided on a coupling stand 31, by means of which the machine frame 10 can be mounted on a tractor 2 coupled, for example by a conventional three-point coupling.
    The machine frame 10 is in this case steerably coupled against said coupling head 31 about an upright drawbar shaft 32, such that the machine frame 10 can pivot relative to the coupling head 31 and thus to the tractor 2.
    As shown in FIG. 5, the pilot cylinder 30 is built and / or arranged in such a way that, during pivotal movements of the machine frame 10 relative to the coupling head 31, it undergoes a change in length, as a result of which hydraulic fluid is displaced from the pilot cylinder 30 and is absorbed in reverse. These hydraulic volumes displaced during steering movements can be converted with corresponding adjustment movements of the steering cylinder 21. A hydraulic connection is provided between the front steering cylinder 30 and the steering cylinder 21, for example in the form of directly connected hydraulic lines.
    As shown in FIG. 5, the pre-steering cylinder can be arranged in an integrated manner transversely to the direction of travel in the coupling head 31, for example in an inner space enclosed by the components of the coupling head 31, such that the steering cylinder 30 is shielded and the construction space of the coupling head 31 is utilized. .
    The pre-steering cylinder 30 can on the one hand have a coupling point 33 on the coupling stand 31, which are fixedly mounted on the coupling stand and can be designed to be controllable. On the other hand, the pre-steering cylinder 30 can be coupled to a hinge lever and / or a rocker arm, which in turn is steerably mounted on the coupling stand 31. Finally, the said tumbler 31 is coupled to the machine frame 10 by a plate 35 or a suitable connecting coupling piece, for example in the form of a tensile pressure rod, wherein the plate 35 is coupled to the machine frame 10 in such a way that the tumbler 34 during pivotal movements of the machine frame 10 a pivotal movement is carried out about the drawbar shaft 32 relative to the coupling stand 31, as a result of which the forward steering cylinder 30 coupled thereto undergoes a change in length.
    In view of the hydraulic design of the coupling, in particular of the use of the hydraulic steering cylinders 21, finally, for the superimposed steering depending on the pivot angle of the machine frame 10 about the drawbar shaft 32, a steering mode independent of this can also be realized in a simple manner, wherein the wheels 15 can be steered independently of the pivot angle between coupling stand 31 and machine frame 10, for example for shunting when reversing. For this purpose, a suitable valve device may be connected, for example in the hydraulic circuit with which the steering cylinders 21 are operated, by means of which the pilot cylinder 30 is disconnected by the steering cylinder 21 and the latter can be connected to another pressure source, for example with a hydraulic connection to the tractor 2, which can be operated by a steering tool on the tractor.
    Similarly, the adjusting cylinder 26 for adjusting the steering characteristic can not only be controlled or coupled to the lifting device 11 in dependence on the lifting position of the reels 4, but can also be manually or in dependence on other operating parameters are controlled if the case arises. The adjusting cylinder 26 or its hydraulic circuits for operating the adjusting cylinder 26 can also be uncoupled from the lifting device 11 by means of a suitable valve device and, for example, can be coupled to a hydraulic supply on the tractor side, for example by means of a steering device being able to set the steering characteristic manually or as a function of another operating parameter on the tractor, for example a travel speed.
    权利要求:
    Claims (15)
    [1]
    An agricultural coupling implement, in particular a hay-collecting machine, with a machine frame (10) pivotable for coupling an upright drawbar shaft (32) to a tractor (2), as well as a carriage (14) with at least a steerable wheel (15) which is mounted on an axle leg (17) adjustable about an upright steering shaft (16) relative to the machine frame (10), a steering actuator for adjusting the wheel (15) and an adjusting device (27) is provided for adjusting the steering angle transmission of the steering actuator, characterized in that the steering actuator comprises a double-acting steering cylinder which is coupled to a steering lever (19) of the axle leg (17), the adjusting device (27) being an adjusting actuator (26) for adjusting the distance of the steering cylinder (21) from the steering cylinder (21) on the steering lever (19) relative to the steering axle (16) of the axle leg (17).
    [2]
    Agricultural coupling tool according to the preceding claim, wherein the steering lever (19) of the axle leg (17) has a guide (24), preferably in the form of a slotted hole, along which the coupling point (23) of the steering cylinder (21) ) is slidable on the control lever (19) of the actuator (26).
    [3]
    An agricultural coupling implement according to the preceding claim, wherein the guide (24) forms a circular arc-shaped guide track, the center of curvature of which is a wheel (15) with a coupling point (22) which is not set in a neutral position for straight-ahead travel. of the steering cylinder (21) on the machine frame (10) coincides.
    [4]
    Agricultural coupling implement according to one of the preceding claims, wherein a control device (36) for controlling the adjusting device (27) in dependence on a coupling implement operating parameter and / or in dependence on a tractor operating parameter is designed such that the coupling point (23) of the steering cylinder (21) for transporting the coupling tool over the road in a position moderately influencing the steering angle of the wheel (15) and for operating operation in a position more strongly influencing the steering angle of the wheel (15) being driven.
    [5]
    Agricultural coupling implement according to one of the preceding claims, wherein the adjusting device (27) is controlled by control means in dependence on the position and / or the operating status of a working unit and / or in dependence on the driving speed of the tractor (2) and / or the coupling tool can be controlled automatically.
    [6]
    Agricultural coupling implement according to the preceding claim, wherein the adjusting actuator (26) of the adjusting device (27) selectively by means of a valve device by a lifting device (11) for lifting the working unit or by a hydraulic supply of the tractor (2) ) can be supplied with hydraulic pressure.
    [7]
    Agricultural coupling implement according to one of the preceding claims, wherein the steering cylinder (21) is under hydraulic bias.
    [8]
    Agricultural coupling implement according to one of the preceding claims, wherein the steering cylinder (21) supports and fixes the steering lever (19) of the axle leg (17) directly relative to the machine frame (10) in a relevant steering position.
    [9]
    Agricultural coupling implement according to one of the preceding claims, wherein the steering cylinder (21) comprises two separate piston rods, which are movable from opposite sides of a common cylinder and are each designed to be double-acting and hydraulically prestressed.
    [10]
    An agricultural coupling implement according to any one of the preceding claims, wherein the adjusting actuator (26) is arranged on the control lever (19), the adjusting actuator (26) being coupled on the one hand to said control lever (19) and on the other hand to the coupling point (23) ) of the steering cylinder (21) or directly to the steering cylinder (21).
    [11]
    An agricultural coupling implement according to any one of the preceding claims, wherein the carriage (14) comprises two wheels (15), each of which is rotatably mounted with an axle leg (17) about a steering axle (16), wherein only one of the steering levers ( 19) is connected to said steering cylinder (21) and a track rod (23) is steerably coupled to the two steering levers (19) and couples the two steering levers (19) together.
    [12]
    An agricultural coupling implement according to any one of the preceding claims, wherein the steering cylinder (21) is operable by a steering cylinder (30), which is hydraulically coupled to the steering cylinder (21) and is built in such a way that a hinging of the machine frame (10) causes a change in the length of the steering cylinder (30) about the drawbar axis (32) relative to the tractor (2).
    [13]
    An agricultural coupling implement according to the preceding claim, wherein the propulsion cylinder (30) is integrated in a coupling stand (31) which is pivotally connected to the machine frame (10) about the drawbar axis (32) and to the tractor (2) ), wherein the pilot cylinder (30) is arranged in a space surrounded by structural parts of the coupling stand (31) and / or lying on the coupling stand (31).
    [14]
    An agricultural coupling implement according to the preceding claim, wherein the front steering cylinder (30) has a fixed coupling point (33) on the coupling stand (31) and on the other hand is coupled to a hinge lever (34) which is pivotable on the coupling stand (31) is coupled, wherein furthermore a connecting coupling piece (35) is provided, which connects the machine frame (10) to the pilot cylinder (31) and / or the hinge coupling piece (34).
    [15]
    Agricultural coupling implement according to one of the preceding claims, wherein the steering device for the at least one wheel (13) is designed freely from a central steering rod and the steering cylinder (21) can only be operated hydraulically.
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    同族专利:
    公开号 | 公开日
    NL2015453B1|2020-04-30|
    DE102014013888A1|2016-03-24|
    FR3025969A1|2016-03-25|
    FR3025969B1|2019-04-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2600016A|1950-07-27|1952-06-10|Davis J Parker|Hydraulic drawbar control|
    US2982363A|1958-05-01|1961-05-02|Sweet Ralph|Land wheel steering for one way plows and the like|
    FR2376606B1|1977-01-06|1980-09-12|Bonnel Charrues|
    DE3421178A1|1984-06-07|1985-12-12|Silo-Wolff KG, 3471 Lauenförde|Device for an implement combination for ground working|
    DE20321819U1|2003-04-16|2010-10-07|Claas Saulgau Gmbh|Chassis steering for an agricultural machine|
    DE202004019793U1|2004-12-23|2005-03-24|Stoll Maschf Gmbh Wilhelm|Wind rower has two rotating rakes, rear rake being mounted on separate pivoting tow bar and control comprising two bars with cooperating pin and slot allowing rear rake to be swiveled so that wind rower deals with two swathes|
    FR2881019B1|2005-01-21|2008-07-11|Sarl Thievin Et Fils Sarl|SOIL WORKING KIT|
    NL1031873C1|2006-05-02|2007-11-05|Maasland Nv|Haymaking machine.|
    法律状态:
    2021-05-12| MM| Lapsed because of non-payment of the annual fee|Effective date: 20201001 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014013888.7A|DE102014013888A1|2014-09-18|2014-09-18|Agricultural implement|
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