• 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:
    Vehicle, preferably an agricultural vehicle, such as a spreader for application of dispersible materials, such as manure. The vehicle comprises a carriage box and a hydraulic system comprising means for connection with a hydraulic pump; the substantially linear displacement of at least one of the turning wheels, - one or more hydraulic cylinders forming part of the chain tensioner means. The hydraulic cylinders provide chain tensioning with piston movement in one direction. The vehicle has a first operating mode in which the bottom chain has a first operating direction and a second operating mode in which the bottom chain has a second operating direction. The hydraulic cylinders have a first effective piston area in the first operating mode and a second effective piston area in the second operating mode. The first and second effective piston areas are different from one another. Process for hydraulic tensioning of chain tensioning means in an agricultural vehicle.
    公开号:DK201870780A1
    申请号:DKP201870780
    申请日:2018-11-27
    公开日:2019-08-07
    发明作者:Nørlund Thomsen Carsten；Mejlstrup Jensen Søren
    申请人:Samson Agro A/S；
    IPC主号:
    专利说明:

    Vehicle with bottom chain tensioners
    FIELD OF THE INVENTION
    The present invention relates to a vehicle, preferably an agricultural vehicle, such as a spreader for dispensing spreadable materials, such as manure, comprising a trolley and a hydraulic system comprising
    - means for connection with a hydraulic pump,
    a hydraulic motor for driving a feeding device arranged at the bottom of the carriage comprising at least one bottom chain with associated turning wheels and chain tensioning means for tightening the bottom chain through a substantially linear displacement of at least one of the turning wheels,
    - one or more hydraulic cylinders which form part of the chain tensioning means and which provide piston movement in one direction with chain tensioning, the vehicle having a first operating mode, in which the bottom chain has a first operating direction and a second operating mode, in which the bottom chain has a second operating direction, which is opposite to the first operating direction.
    Furthermore, the present invention relates to a method for hydraulically tensioning chain tensioning agents in a vehicle, preferably an agricultural vehicle, such as a spreader for spreading spreadable materials, such as manure, comprising a trolley and a hydraulic system comprising
    - means for connection with a hydraulic pump,
    a hydraulic motor for driving a feeding device arranged at the bottom of the carriage comprising at least one bottom chain with associated turning wheels and chain tensioning means for tightening the bottom chain through a substantially linear displacement of at least one of the turning wheels,
    - one or more hydraulic cylinders which form part of the chain tensioning means and which provide piston movement in one direction with chain tensioning, the vehicle having a first operating mode, in which the bottom chain has a first operating direction and a second operating mode, in which the bottom chain has a second operating direction, which is opposite to the first operating direction.
    DK 2018 70780 A1
    BACKGROUND OF THE INVENTION
    Within agricultural machinery, among other things, it is widespread to use chainsaws for various purposes. In the case of spreaders for application of manure, compost, sludge or the like, it is known to use chains for conveying the material in that bottom chains are provided with bottom chains which are provided with transverse carrier elements for transporting the contents of the box, such as fertilizers. or the like, in the direction of movement of the bottom chains for reading the contents.
    The bottom chains are typically arranged along the long sides of the vehicle and thus are under heavy load, with the entire contents resting on top of the transverse drivers between the bottom chains.
    Since the bottom chains are subjected to wear and tear during operation, it is known to arrange an adjusting device for tightening the chains by adjusting the position of one of the turning wheels in connection with each bottom chain.
    This adjustment device works in that the turning wheel is mounted in a longitudinally slidable slide in a backrest. The sliding block is provided with a threaded rod with an adjusting nut which acts against a fixed stop, where at the position of the turning wheel relative to the other turning wheel (s) in the chain transmission can be adjusted by means of the nut. This is a relatively simple and robust construction, which also makes it easy to tighten and remove a bottom chain. The bottom chains can thus be manually tightened by tightening the nut in the adjusting device.
    Thus, a tightening of the bottom chains at regular intervals is desirable because unnecessary wear is avoided. In addition, the efficiency of the chain transmission is also negatively affected by a worn and slack bottom chain. If the bottom chain is too slack, there is also a great risk of the tow wheel tipping over with a standstill. Furthermore, a slack bottom chain is difficult to steer correctly and thus there is a high risk of the chain getting trapped and thus damaged. Agricultural vehicles, such as the aforementioned spreaders, generally operate in highly corrosive environments and often handle very aggressive materials, which also causes the bottom chains to be subjected to corrosion, which also contributes to wear and tear of the chains.
    DK 2018 70780 A1
    The bottom chains associated with agricultural vehicles, such as e.g. however, fertilizer spreaders, beet harvesters and unloading trailers are located at the bottom of the box, making them difficult to access, which can make it difficult to do this tightening. Furthermore, if there is a long delay between the adjustments, it is likely that the adjusting nut reaches a tightening, which further complicates the chain tightening.
    Typically, the vehicles are used intensively for shorter periods, after which they are stored for the following season. This means that in practice the tightening of the bottom chains is often only rarely or even never done. What typically happens is that the bottom chain is removed and one or more chain links removed when stretched to an unacceptable length.
    From DK172309 B1, it is known to extend the already existing hydraulic system for conveying the bottom chains with a hydraulically activatable means for chain tensioning. Thus, a self-regulating chain tensioning is provided which does not require regular manual alignment or adjustment of the spacing of the sprockets in the chain transmission, the chain tensioning means being able to sustain a given tension in the bottom chain by a hydraulic cylinder pushing or pulling one of the sprockets in the direction of the chain. from the other wheel (s). The chain tension is provided by controlling the pressure of the oil in the cylinder and thus the force by which the turning wheel is actuated to establish and maintain a desired tension in the chain transmission. This continuous regulation of the bottom chain maintains an approximately constant tension in it to achieve less wear and thus a longer life of the bottom chain.
    However, the vehicle has different modes of operation. For example, a mode for spreading the contents of the cart onto the field and a mode for reversing the contents of the cart.
    The load on the bottom chain can vary between these two operating modes. The known vehicles therefore have the disadvantage that they do not adapt the clamping force of the chain clamp to the operating mode. Thus, the bottom chain can be operated in an overvoltage state.
    DK 2018 70780 A1
    The object of the invention
    It is an object of the invention to provide a vehicle that alleviates these disadvantages.
    It is an object of the invention to provide a vehicle with a self-adjusting bottom chain tensioner system in a vehicle of the type mentioned in the preamble, wherein the bottom chain is tightened with different clamping forces in the various operating modes.
    Further, the object of the invention is to provide a vehicle where the wear of the bottom chain is minimized.
    Furthermore, the object of the invention is to eliminate unintentional shutdowns and repairs.
    Further, the object of the invention is to provide a vehicle where wear in the hydraulic cylinders is minimized.
    Further, the object of the invention is to provide a method for hydraulically tensioning chain tensioning means in a vehicle which reduces wear in the hydraulic cylinders and / or the bottom chain.
    Description of the Invention
    This is achieved in accordance with the present invention with a vehicle of the type initially specified, and as described in the preamble of claim 1, characterized in that the hydraulic cylinders have a first effective piston area in the first operating mode, that the hydraulic cylinders have a second effective piston area in the second operating mode and that the first and second effective piston areas are different from each other.
    In an operating mode where the material on the trolley is spread on, for example, a field, the load on the chain tensioner means will be moderate. The material is pulled directly against the hydraulic motor. Thus, only the load of the chain itself acts on the chain tensioner means.
    DK 2018 70780 A1
    In an operating mode where the operating direction of the bottom chain is opposite to the operating direction of spreading, there will be a significantly higher load on the chain tensioner means. The material is now pulled away from the hydraulic motor via the chain tensioner means which redirects the hydraulic motor's traction. Thus, the chain tensioner means are affected both by the load from the chain and the traction of the hydraulic motor.
    The various effective piston areas are a simple way to provide different clamping forces in the chain tensioner means in the first and second operating modes.
    The adapted and different clamping forces in the first and second operating modes reduce bottom chain wear and hydraulic cylinders compared to using the same clamping force in the first and second operating modes.
    No separate pressure control is required for the chain tensioner means. One pressure control can be used for both the chain pull and the chain tensioning means. Thus, a robust system is obtained that requires minimal service.
    Activation of first and second effective piston areas in the different operating modes is provided by changing the flow direction of the hydraulic system. A change of flow direction can be provided by a control valve.
    The pump in the hydraulic system may be located on the vehicle itself. In this case, for example, the pump may be driven by a drive shaft connected to a tractor.
    The hydraulic system includes means for connecting to the hydraulic pump. These will be means in the form of a hydraulic line on the pressure side and a hydraulic line on the return side. Generally, there will also be provided an oil reservoir to which the return oil is supplied and from which the hydraulic oil is supplied to the suction side of the hydraulic pump.
    The hydraulic pump and oil reservoir will generally be located on a tractor towing the vehicle but may alternatively be mounted on the vehicle and driven by a PTO axle or on a off-road truck.
    DK 2018 70780 A1
    For example, in an operating mode, the clamping force may be between 30 and 200 bar, preferably between 50 and 180 bar, more preferably 135 bar.
    This avoids the high pressures that could be experienced in known systems where the clamping force could be over 200 bar and typically could be between 300 and 400 bar.
    The vehicle can be a tadpole.
    According to a further embodiment, the vehicle according to the invention is characterized in that the hydraulic cylinders are double-acting cylinders.
    The double-acting cylinders enable a space-saving provision of the chain tensioner means on the vehicle. Thus, the chain tensioning means can be used in vehicles of compact construction.
    The double-acting cylinders may be double-acting cylinders with two chambers. One of the chambers can be operated as a single-acting cylinder.
    According to a further embodiment, the vehicle according to the invention is characterized in that the first and second effective piston areas are provided by activating a different number of single-acting hydraulic cylinders.
    According to a further embodiment, the vehicle according to the invention is characterized in that the hydraulic cylinders are arranged in parallel.
    According to a further embodiment, the vehicle according to the invention is characterized in that a control valve is provided between the hydraulic cylinders and the hydraulic pump which reverses the flow direction in the hydraulic system.
    The bypass valve provides activation of the first and second effective piston areas by reversing the flow direction of the hydraulic system. At the same time, the operating direction is controlled by the bottom chain with the control valve. Thus, it is always ensured that the chain tensioning pressure is adapted to the operating direction of the bottom chain and thus the operating mode of the vehicle.
    DK 2018 70780 A1
    According to a further embodiment, the vehicle according to the invention is characterized in that a switching valve is arranged between the switch valve and the overpressure valve.
    The switch valve includes two inputs and one outlet. The inlet of the changeover valve is connected to the switching valve and the output of the changeover valve is connected to the overpressure valve.
    The shift valve cooperates with the control valve and provides activation of the first and second effective piston areas.
    According to a further embodiment, the vehicle according to the invention is characterized in that between a hydraulic cylinders and the hydraulic pump, a check valve and an overpressure valve are arranged in parallel between at least part of the hydraulic cylinders and the hydraulic pump.
    Check valve and overpressure valve maintain a minimum pressure on the chain tensioner means. Thus, a minimum pressure will always be maintained between the relevant hydraulic cylinders and the hydraulic pump.
    During the start of reversing, the pressure in the vehicle's hydraulic system may increase briefly. Thus, the clamping force in the chain tensioning means will increase. If the vehicle comprises only a non-return valve, the chain tensioning pressure will be maintained afterwards with excessive pressure. The overpressure valve causes the pressure on the hydraulic cylinders to decrease again. Thus, the overpressure valve eliminates over tightening of the chain tensioner means which may occur at pressure peaks at the start of reversal. Thus, wear on the bottom chain and on the hydraulic cylinders is reduced.
    A further aspect of the invention is a method of hydraulically tensioning the chain tensioning means in a vehicle, preferably an agricultural vehicle, such as a spreader for dispensing spreadable materials, such as manure, including a carriage box and a hydraulic system comprising
    -a hydraulic pump,
    a hydraulic motor for driving a feeding device arranged at the bottom of the carriage comprising at least one bottom chain with associated turning wheels and chain
    DK 2018 70780 A1 tightening means for tightening the bottom chain through a substantially linear displacement of at least one of the turning wheels,
    - one or more hydraulic cylinders which form part of the chain tensioning means and which provide piston movement in one direction with chain tensioning, the vehicle having a first operating mode, in which the bottom chain has a first operating direction and a second operating mode, in which the bottom chain has a second operating direction, opposite to the first operating direction, which is characterized in that the method comprises the steps of:
    - a first clamping force is provided in the chain tensioner means with a first effective piston area of the hydraulic cylinders in the first operating mode,
    - a different clamping force is provided in the chain tensioner means with a second effective piston area, different from the first effective piston area, in the second operating mode.
    The method can be used with any embodiment of the vehicle described in the present application.
    In a further aspect of the invention, the method is characterized in that it further comprises the following steps wherein:
    - the flow direction of the hydraulic system is reversed.
    Reversing the flow direction may provide activation of the first and / or second effective piston area.
    Reversing the flow direction can provide shifts in the operating direction of the bottom chain.
    Reversal of the flow direction can be provided with a bypass valve.
    In a further aspect of the invention, the method is characterized in that the first and second piston areas are provided by one or more double-acting hydraulic cylinders.
    DK 2018 70780 A1
    The double-acting hydraulic cylinders are space-saving. Thus, the method can be utilized in vehicles where there are space limitations for the hydraulic cylinders and / or the chain tensioner means.
    In a further aspect of the invention, the method is characterized in that it further comprises the following steps wherein:
    - a minimum pressure is maintained on the chain tensioner means in all operating modes.
    Maintaining the minimum pressure on the chain tensioning means precludes the possibility of operating the bottom chain with too low chain tension pressure if the pressure in the hydraulic system during operation should fall below the minimum pressure. Thus, wear on the bottom chain is reduced.
    The minimum pressure can be provided with the parallel connected check valve and overpressure valve between the pump and at least part of the hydraulic cylinders.
    drawing Description
    The invention will now be explained in more detail with reference to the accompanying drawings, in which
    FIG. 1 shows a side view of a prior art vehicle, FIG. 1a is a section of FIG. 1, showing the chain tensioner means of the vehicle as shown in FIG. 1 is provided with, FIG. 2 shows a hydraulic diagram of an embodiment of a hydraulic system according to the invention, FIG. 2a shows a schematic representation of the first effective piston area for Figure 2; FIG. 3 shows a hydraulic diagram of the hydraulic system shown in FIG. 2 with reversed flow, FIG. 3a shows a schematic representation of the second effective piston area for Figure 3; FIG. 4 shows a hydraulic diagram of a further embodiment of a hydraulic system according to the invention,
    DK 2018 70780 A1
    FIG. 4a shows a schematic representation of the first effective piston area for Figure 4; FIG. 5 shows a hydraulic diagram of the hydraulic system shown in FIG. 4 with reversed flow, FIG. 5a shows a schematic representation of the second effective piston area for Figure 5; FIG. 6 shows a hydraulic diagram of a further embodiment of a hydraulic system according to the invention, FIG. 6a shows a schematic representation of the first effective piston area for Figure 6; FIG. 7 shows a hydraulic diagram of the hydraulic system shown in FIG. 6 with reversed flow, FIG. 7a shows a schematic representation of the second effective piston area for Figure 7; FIG. 8 shows a hydraulic diagram of a further embodiment of a hydraulic system according to the invention, FIG. 8a shows a schematic representation of the first effective piston area for Figure 8; FIG. 9 shows a hydraulic diagram of the hydraulic system shown in FIG. 8 with reversed flow, and FIG. 9a shows a schematic representation of the second effective piston area for Figure 9.
    In the following description, identical or similar elements will be denoted by the same reference numerals in the various figures. Thus, no explanation will be given for all the details of each figure / embodiment.
    Detailed description of the invention
    FIG. 1 shows a vehicle 24 according to the invention in the form of a spreader for spreading spreadable materials, such as manure and the like, wherein the bottom chains 1 are arranged side by side at the bottom of the carriage and are provided with transverse carrier elements 9. The bottom chains 1 are further provided with chain tensioner
    DK 2018 70780 A1 means 2 for tightening the bottom chains 1. The bottom chains 1 are driven by a hydraulic motor 5, which is coupled to sprockets not shown, with which the bottom chains 1 in one of the feeding device engage, which sprocket is mounted in the bottom of the carriage or in the vehicle chassis 7. At the other end of the feed device, each of the bottom chains 1 is engaged around a turning wheel 3 mounted on the chain tensioner means 2, which in turn is attached to the car body or in the vehicle chassis 7.
    The bottom chain 1 has a first operating direction 21 and a second operating direction 22. The first operating direction 21 is used for unloading / spreading the material on the carriage. The second operating direction 22 is used for reversing the material on the carriage.
    The chain tensioner means 2, shown in more detail in FIG. 1a, it can displace the turning wheel 3 in a backstop guide 6 in a direction parallel to the forward chain of the bottom chain. As shown in FIG. 1a, the chain tensioner means 2 comprises a plurality of hydraulic cylinders 4 which are attached to the chassis 7 or the bottom plate of the carriage at the cylinder housing.
    The hydraulic cylinders 4 are arranged in a cylinder guide 8 which exhibits individual guides for the pistons of the hydraulic cylinders so that the cylinders 4 will push the guide 8 away from the suspension in the chassis / base plate 7, thereby turning the turning wheels 3 arranged on the cylinder guide 8 linearly in their backdrop 6.
    FIG. 2 and 3 show a diagram of an embodiment of a hydraulic system 11 according to the invention, which is built into a vehicle according to figure 1.
    The pressure side of the hydraulic system 11 is marked by a thicker line.
    A hydraulic pump 12 drives one or more hydraulic motors 5 and hydraulic cylinders 4 in the chain tensioner means 2.
    The hydraulic system 11 is connected to the hydraulic pump 12 via a hydraulic line 25 on the pressure side and a hydraulic line 26 on the return side. Generally, there will also be provided an oil reservoir 27 to which the return oil is supplied and from which the hydraulic oil is supplied to the suction side of the hydraulic pump 12.
    DK 2018 70780 A1
    The hydraulic pump and oil reservoir will generally be located on a tractor pulling the vehicle but may alternatively be mounted on vehicle 24 and driven by a PTO shaft 28 (see Fig. 1).
    The hydraulic cylinders 4 are double acting cylinders 13.
    The hydraulic cylinders 4 are arranged in parallel.
    Between the hydraulic cylinders 4 and the hydraulic pump 12 is arranged a bypass valve 14. The bypass valve 14 can reverse the flow direction 15 of the hydraulic system 11.
    Between the hydraulic cylinders 4 and the hydraulic pump 12, a check valve 16 and a pressure relief valve 17 are arranged in parallel. That is, the valves 16, 17 are disposed between the hydraulic pump 12 and one side of the double-acting cylinders 13.
    Between the switch valve 14 and the overpressure valve 17, a switch valve 20 is arranged. The switch valve 20 comprises two inputs and one outlet. The inlet valve inlets are connected to the switch valve 14 and the outlet valve outlet is connected to the overpressure valve 17.
    In Figure 2, the control valve is in a position where flow direction 15 is not reversed. Thus, the vehicle is in a first mode of operation, with the bottom chain (not shown) in a first direction of operation. For example, for spreading the material on the trolley.
    Both sides of the double-acting cylinders are pressurized. Figure 2a schematically shows the first effective piston area 18 which is the total shaded surface of the four hydraulic cylinders in the system.
    In Figure 3, the control valve is in a position where the flow direction 15 is reversed. Thus, the vehicle is in a different mode of operation where the bottom chain (not shown) is in a different mode of operation. For example, for reversing the material on the trolley.
    DK 2018 70780 A1
    One side of the double-acting cylinders 13 is pressurized. Figure 3a schematically shows the second effective piston area 19, which is the total shaded surface of the four hydraulic cylinders 4 in the system.
    The method of hydraulically tensioning the chain tensioning means in the vehicle 24 comprises the following steps where:
    - a first clamping force is provided in the chain tensioner means 2 with a first effective piston area of the hydraulic cylinders in the first operating mode. This is shown in Figure
    2nd
    - a different clamping force is provided in the chain tensioner means with a second effective piston area, different from the first effective piston area, in the second operating mode. This is shown in Figure 3.
    The method can be used with any embodiment of the vehicle described in the present application.
    The method may further comprise:
    - the flow direction of the hydraulic system is reversed.
    Reversing the flow direction may provide activation of the first and / or second effective piston area. Figure 3 shows a reversed flow direction relative to Figure
    2. Figure 2 shows the system in a first operating mode in which the first effective piston area is activated and Figure 3 shows a second operating mode in which the second effective piston area is activated.
    Reversing the flow direction provides shifts in the operating direction of the bottom chain.
    Reversing the flow direction is provided with a bypass valve 14.
    In a further aspect of the invention, the method is characterized in that the first and second piston areas are provided by one or more double-acting hydraulic cylinders.
    DK 2018 70780 A1
    The double-acting hydraulic cylinders are space-saving. Thus, the method can be utilized in vehicles where there are space limitations for the hydraulic cylinders and / or the chain tensioner means.
    In a further aspect of the invention, the method is characterized in that it further comprises the following steps wherein:
    - a minimum pressure is maintained on the chain tensioner means in all operating modes.
    Maintaining the minimum pressure on the chain tensioning means precludes the possibility of operating the bottom chain with too low chain tension pressure if the pressure in the hydraulic system during operation should fall below the minimum pressure. Thus, wear on the bottom chain is reduced.
    The minimum pressure can be provided with the parallel connected check valve and overpressure valve between the pump and at least part of the hydraulic cylinders.
    FIG. 4 and 5 show a diagram of a further embodiment of a hydraulic system 11 according to the invention, which is built into a vehicle according to figure 1.
    The pressure side of the hydraulic system 11 is marked by a thicker line.
    A hydraulic pump 12 drives one or more hydraulic motors 5 and hydraulic cylinders 4 in the chain tensioner means 2.
    The hydraulic cylinders 4 are arranged in parallel.
    The hydraulic cylinders 4 are double-acting cylinders 13 with two chambers. A chamber is driven double acting and a chamber is operated single acting.
    Between the hydraulic cylinders 4 and the hydraulic pump 12 is arranged a bypass valve 14. The bypass valve 14 can reverse the flow direction 15 of the hydraulic system 11.
    DK 2018 70780 A1
    Between the hydraulic cylinders 4 and the hydraulic pump 12, a check valve 16 and a pressure relief valve 17 are arranged in parallel. That is, the valves 16, 17 are disposed between the hydraulic pump 12 and a side of the first chamber of the double-acting cylinders 13.
    Between the switch valve 14 and the overpressure valve 17, a switch valve 20 is arranged. The switch valve 20 comprises two inputs and one outlet. The inlet valve inlets are connected to the switch valve 14 and the outlet valve outlet is connected to the overpressure valve 17.
    In Figure 4, the control valve is in a position where the flow direction 15 is not reversed. Thus, the vehicle is in a first mode of operation, with the bottom chain (not shown) in a first direction of operation. For example, for spreading the material on the trolley.
    Both sides of the first chamber of the double-acting cylinders 13 are pressurized. The second chamber is not pressurized. Figure 4a schematically shows the first effective piston area 18, which is the total shaded surface of the four hydraulic cylinders in the system.
    In Figure 5, the control valve is in a position where the flow direction 15 is reversed. Thus, the vehicle is in a different mode of operation where the bottom chain (not shown) is in a different mode of operation. For example, for reversing the material on the trolley.
    One side of the first and second chambers of the double-acting cylinders 13 is pressurized. Figure 5a schematically shows the second effective piston area 19, which is the total shaded surface of the four hydraulic cylinders 4 in the system.
    FIG. 6 and 7 show a diagram of a further embodiment of a hydraulic system 11 according to the invention, which is built into a vehicle according to figure 1.
    The pressure side of the hydraulic system 11 is marked by a thicker line.
    A hydraulic pump 12 drives one or more hydraulic motors 5 and hydraulic cylinders 4 in the chain tensioner means 2.
    DK 2018 70780 A1
    The hydraulic cylinders 4 are arranged in parallel.
    The hydraulic cylinders 4 are single acting cylinders 23.
    Between the hydraulic cylinders 4 and the hydraulic pump 12 is arranged a bypass valve 14. The bypass valve 14 can reverse the flow direction 15 of the hydraulic system 11.
    Between a portion of the hydraulic cylinders 4 and the hydraulic pump 12, a check valve 16 and a pressure relief valve 17 are arranged in parallel.
    Between the switch valve 14 and the overpressure valve 17, a switch valve 20 is arranged. The switch valve 20 comprises two inputs and one outlet. The inlet valve inlets are connected to the switch valve 14 and the outlet valve outlet is connected to the overpressure valve 17.
    In Figure 6, the control valve is in a position where flow direction 15 is not reversed. Thus, the vehicle is in a first mode of operation, with the bottom chain (not shown) in a first direction of operation. For example, for spreading the material on the trolley.
    Some of the hydraulic cylinders are pressurized. Figure 6a schematically shows the first effective piston area 18, which is the total shaded surface of the four hydraulic cylinders 4 in the system which is pressurized.
    In Figure 7, the control valve is in a position where the flow direction 15 is reversed. Thus, the vehicle is in a different mode of operation where the bottom chain (not shown) is in a different mode of operation. For example, for reversing the material on the trolley.
    All hydraulic cylinders 4 are pressurized. Figure 7a schematically shows the second effective piston area 19, which is the total shaded surface of the 8 pressurized hydraulic cylinders 4 in the system.
    FIG. Figures 8 and 9 show a diagram of a further embodiment of a hydraulic system 11 according to the invention, which is built into a vehicle according to Figure 1.
    DK 2018 70780 A1
    The pressure side of the hydraulic system 11 is marked by a thicker line.
    A hydraulic pump 12 drives one or more hydraulic motors 5 and hydraulic cylinders 4 in the chain tensioner means 2.
    The hydraulic cylinders 4 are arranged in parallel.
    Part of the hydraulic cylinders 4 are double acting cylinders 13.
    Between the hydraulic cylinders 4 and the hydraulic pump 12 is arranged a bypass valve 14. The bypass valve 14 can reverse the flow direction 15 of the hydraulic system 11.
    Between a portion of the hydraulic cylinders 4 and the hydraulic pump 12, a check valve 16 and a pressure relief valve 17 are arranged in parallel.
    Between the switch valve 14 and the overpressure valve 17, a switch valve 20 is arranged. The switch valve 20 comprises two inputs and one outlet. The inlet valve inlets are connected to the switch valve 14 and the outlet valve outlet is connected to the overpressure valve 17.
    In Figure 8, the control valve is in a position where flow direction 15 is not reversed. Thus, the vehicle is in a first mode of operation, with the bottom chain (not shown) in a first direction of operation. For example, for spreading the material on the trolley.
    Part of the hydraulic cylinders is pressurized. Both sides of the double-acting cylinders 13 are pressurized. Figure 8a schematically shows the first effective piston area 18, which is the total shaded surface of the four hydraulic cylinders 4 in the system which is pressurized.
    In Figure 9, the control valve is in a position where the flow direction 15 is reversed. Thus, the vehicle is in a different mode of operation where the bottom chain (not shown) is in a different mode of operation. For example, for reversing the material on the trolley.
    DK 2018 70780 A1
    All hydraulic cylinders 4 are pressurized. Figure 9a schematically shows the second effective piston area 19, which is the total shaded surface of the 8 pressurized hydraulic cylinders 4 in the system.
    DK 2018 70780 A1
    List of referral names
    Scraper
    Chain tensioning means
    Turning Wheel
    Hydraulic cylinders
    Hydraulic Motor
    backdrop Control
    chassis
    Cylinder Control
    Conveyor Components
    Coach body
    Hydraulic system
    Hydraulic pump
    Double acting cylinder
    reversing valve
    flow Direction
    Check valve
    Pressure relief valve
    First effective stamp area
    Other effective stamp area
    switching valve
    First operating direction
    Other operating direction
    Single acting hydraulic cylinder
    Vehicle
    Hydraulic pressure on the pressure side
    Hydraulic return pipe
    oil Reservoir
    PTO shaft
    权利要求:
    Claims (10)
    [1]
    patent claims
    A vehicle, preferably an agricultural vehicle, such as a spreader for application of spreadable materials, such as manure, comprising a carriage box and a hydraulic system comprising
    means for connection with a hydraulic pump,
    a hydraulic motor for driving a feeding device arranged at the bottom of the carriage comprising at least one bottom chain with associated turning wheels and chain tensioning means for tightening the bottom chain through a substantially linear displacement of at least one of the turning wheels,
    - one or more hydraulic cylinders which form part of the chain tensioning means and which provide piston movement in one direction with chain tensioning, the vehicle having a first operating mode, in which the bottom chain has a first operating direction and a second operating mode, in which the bottom chain has a second operating direction, there is opposite to the first operating direction, characterized in that the hydraulic cylinders have a first effective piston area in the first operating mode, that the hydraulic cylinders have a second effective piston area in the second operating mode, and that the first and second effective piston areas are different from one another.
    [2]
    Vehicle according to claim 1, characterized in that the hydraulic cylinders are double-acting cylinders.
    [3]
    Vehicle according to claim 1, characterized in that the first and second effective piston areas are provided by activating a different number of single-acting hydraulic cylinders.
    [4]
    Vehicle according to any one of the preceding claims, characterized in that the hydraulic cylinders are arranged in parallel.
    [5]
    Vehicle according to any one of the preceding claims, characterized in that a control valve is arranged between the hydraulic cylinders and the hydraulic pump which reverses the flow direction in the hydraulic system.
    DK 2018 70780 A1
    [6]
    Vehicle according to any one of the preceding claims, characterized in that a check valve and an overpressure valve are arranged in parallel between at least part of the hydraulic cylinders and the hydraulic pump between the hydraulic cylinders and the hydraulic pump.
    [7]
    A method of hydraulically tensioning a chain tensioner in a vehicle, preferably an agricultural vehicle, such as a spreader for dispensing dispersible materials, such as manure, including a trolley and a hydraulic system comprising
    - means for connection with a hydraulic pump,
    a hydraulic motor for driving a feeding device arranged at the bottom of the carriage comprising at least one bottom chain with associated turning wheels and chain tensioning means for tightening the bottom chain through a substantially linear displacement of at least one of the turning wheels,
    - one or more hydraulic cylinders which form part of the chain tensioning means and which provide piston movement in one direction with chain tensioning, the vehicle having a first operating mode, in which the bottom chain has a first operating direction and a second operating mode, in which the bottom chain has a second operating direction, which is opposite to the first operating direction, characterized in that the method comprises the steps of:
    - a first clamping force is provided in the chain tensioner means with a first effective piston area of the hydraulic cylinders in the first operating mode,
    - a different clamping force is provided in the chain tensioner with a second effective piston area, different from the first effective piston area, in the second operating mode.
    [8]
    Method according to claim 7, characterized in that it further comprises the following steps wherein:
    - the flow direction of the hydraulic system is reversed.
    [9]
    Method according to any one of claims 7 to 8, characterized in that the first and second piston areas are provided by one or more double-acting hydraulic cylinders.
    DK 2018 70780 A1
    [10]
    Method according to any one of claims 7 to 9, characterized in that it further comprises the following steps wherein:
    - a minimum pressure is maintained on the chain tensioner means in all operating modes.
    类似技术:
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    US4681376A|1987-07-21|Apparatus for tensioning a track chain of a tracklaying vehicle
    DE2420367A1|1974-11-07|HYDRAULIC DEVICE FOR TENSIONING THE TRACKS OF TRACKED VEHICLES
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    US3700288A|1972-10-24|Paving machine
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    EP2688791B1|2015-09-02|Automatic tensioning system of tracks of a paver finisher
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    US4653634A|1987-03-31|Conveyor belt assembly with self-adjusting tension
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    同族专利:
    公开号 | 公开日
    ES2866182T3|2021-10-19|
    DK179870B1|2019-08-07|
    EP3659415A1|2020-06-03|
    EP3659415B1|2020-12-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    AT368469B|1980-07-08|1982-10-11|Voest Alpine Ag|DEVICE FOR ADJUSTING THE TAPE TENSION OF A BAND CONVEYOR AND METHOD FOR OPERATING THIS DEVICE|
    DE8902422U1|1989-03-01|1989-04-27|Ludwig Bergmann Gmbh & Co Kg, 2849 Goldenstedt, De|
    DK172309B1|1996-09-27|1998-03-16|Maskinfabriken Samson Tange A|Vehicle with bottom chains and means for tightening them|
    US20150024888A1|2013-07-18|2015-01-22|Robert M. Curfman|Displacement equalizing hydraulic tensioner for multi-strand endless chain|KR102185483B1|2019-12-09|2020-12-02|농업회사법인 희망농업기계 주식회사|Auto Tensioner for Chain of Traction type Compost Sprayer|
    法律状态:
    2019-08-07| PAT| Application published|Effective date: 20190807 |
    2019-08-07| PME| Patent granted|Effective date: 20190807 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201870780A|DK179870B1|2018-11-27|2018-11-27|Vehicle with bottom chain tensioners|DKPA201870780A| DK179870B1|2018-11-27|2018-11-27|Vehicle with bottom chain tensioners|
    EP19207698.2A| EP3659415B1|2018-11-27|2019-11-07|Vehicle with scraper floor chain tensioner|
    ES19207698T| ES2866182T3|2018-11-27|2019-11-07|Vehicle with scraper floor chain tensioner|
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