• 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:
    Infeed unit (1) of a forage harvester, with a first pair of feed rollers from an upper feed roller and a lower feed roller, and with a seen in Gutflussrichtung behind the first pair of feed roller pair second feed roller pair of an upper feed roller and a lower feed roller, wherein in the range of at least one feed roller pair (2 ) the respective upper feed roller (3) can be pressed against the respective lower feed roller (4) via at least one double-acting differential cylinder (10) in order to provide a pressing force therebetween, and wherein a piston rod side (13) and a piston side (14 ) of the or each differential cylinder (10) to form a rapid traverse circuit for the respective differential cylinder (10) are connected such that the pressure chambers of the piston rod side (13) and the piston side (14) are interconnected so that a pressure medium flow from one to the other pressure - room is conductive, so that zus in addition to a pressure medium flow provided via a feed line (15), an outlet pressure medium flow on the piston rod side (14) can be conducted into an inlet (16) of the piston side (13).
    公开号:BE1025893B1
    申请号:E2018/5596
    申请日:2018-08-27
    公开日:2019-10-01
    发明作者:Martin Lehmann；Florian Wiest
    申请人:Claas Saulgau Gmbh；
    IPC主号:
    专利说明:

    Infeed unit of a forage harvester
    The invention relates to a feed mechanism of a forage harvester.
    DE 196 51 694 A1 discloses the basic structure of a forage harvester in a forage harvester. When viewed in the direction of crop flow, the feed mechanism is positioned in front of a chopper drum, the feed mechanism comprising a first pair of feed rollers consisting of two feed rollers arranged one above the other and a second pair of feed rollers comprising two further feed rollers arranged one above the other. The second pair of feed rollers, which is arranged directly adjacent to the chopper drum, is called the pair of pre-press rollers and the feed rollers of the same are referred to as pre-press rollers.
    Another feed mechanism of a forage harvester is known from EP 2 123 146 B1. There, too, two pairs of feed rollers are shown, each consisting of two feed rollers arranged one above the other. From EP 2 123 146 B1 it is also known to press the upper feed rollers of the feed roller pairs against the lower feed rollers of the feed roller pairs hydraulically using double-acting differential cylinders. According to EP 2 123 146 B1, depending on the switching position of switching valves, the respective differential cylinder can also be used to move the upper feed rollers of the feed roller pairs away from the lower feed rollers of the feed roller pairs.
    DE 10 2013 4 274 B1 and US 6 584 755 B2 each disclose infeed units of forage harvesters in which a single-acting pressure medium cylinder interacts with an upper infeed roller of a pair of infeed rollers. A restoring force provided by a spring element acts counter to the force provided by the single-acting pressure medium cylinder.
    There is a need to simplify the construction of a feed mechanism while maintaining high functionality.
    Proceeding from this, the present invention is based on the object of creating a novel feed mechanism of a forage harvester.
    BE2018 / 5596
    This object is achieved by a feed mechanism of a forage harvester according to claim 1.
    A piston rod side and a piston side of the or each differential cylinder are connected to form a rapid traverse for the respective differential cylinder in such a way that the pressure chambers of the piston rod side (13) and the piston side (14) are connected to one another in such a way that a pressure medium flow can be conducted from one pressure chamber to the other , and in addition to a pressure medium flow provided via a feed line, an outlet pressure medium flow on the piston rod side can be conducted into an inlet on the piston side.
    In some publications, the piston rod side is also referred to as the ring side because the effective area reduced by the piston rod is annular.
    The feed mechanism according to the invention has a simple structure. When using double-acting differential cylinders, the number of hydraulic lines required can be reduced. A pressing force for compressing or compressing the crop can be provided safely and reliably with a simple structure.
    According to an advantageous development, two differential cylinders act on the respective upper feed roller, preferably symmetrically. In particular, the two differential cylinders of the respective upper feed roller can be supplied with pressure medium in parallel from a common feed line.
    The symmetrical arrangement of two differential cylinders prevents a tilting moment from acting on the upper press roller. The parallel application of the differential cylinder via a common supply line again reduces the number of pressure medium lines required.
    According to an advantageous development, a shut-off device interacts with the inlet of the piston side of the respective differential cylinder. Preferably, a vent line branches off downstream of the shut-off element and depends on the switching position of a switching valve
    BE2018 / 5596 is neither closed nor connected to a pressure medium tank for emptying the piston side of the respective differential cylinder.
    With this, the piston side of the respective differential cylinder can be reliably emptied from the pressure medium with a simple construction, for example for maintenance purposes, in order to move the upper feed roller of the respective feed roller pair away from the lower feed roller.
    According to an advantageous development, a pressure medium reservoir and / or pressure control valve interacts with the supply line of the respective differential cylinder. A particularly preferred operation of the feed mechanism can be ensured via the pressure medium accumulator and / or the pressure control valve.
    According to an advantageous development, a sensor for stroke detection of the respective piston and / or a sensor for pressure detection interacts with the respective differential cylinder. The sensor for stroke detection and / or the sensor for pressure detection can be used to set up a control loop that adjusts the pressing force depending on the stroke.
    Preferred developments of the invention result from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being restricted to this. It shows:
    Figure 1 is a schematic section of a feeder of a forage harvester.
    FIG. 2 shows a development of the feed mechanism of FIG. 1; and
    3 shows a further development of the feed mechanism of FIG. 1.
    The present invention relates to a feed mechanism of a forage harvester.
    1 shows a schematic section of a feed mechanism 1 of a self-propelled forage harvester in the area of a pair of feed rollers 2, which comprises an upper feed roller 3 and a lower feed roller 4.
    BE2018 / 5596
    An axis 5, about which the lower feed roller 4 of the feed roller pair 2 is rotatable, is stationary. 1 shows corresponding fixed bearings 6 for the axis 5 of the lower feed roller 4.
    The upper feed roller 3 is also rotatably mounted about an axis 7, but the upper feed roller 3, in contrast to the lower feed roller 4, is not designed to be stationary, but rather can be displaced relative to the lower feed roller 4. Bearings 8 for the axis 7 of the upper feed roller 3 are accordingly displaceable via links 9 which engage at one end on the respective axle bearing 8 and at an opposite end on a housing.
    At least one double-acting differential cylinder 10 interacts with the upper feed roller 3 of the pair of feed rollers 2 in order to exert a pressing force with the upper feed roller 3 relative to the lower feed roller 4. In the preferred exemplary embodiment shown, two differential cylinders 10 cooperate with the upper feed roller 3 of the pair of feed rollers 2.
    Depending on the pressing force exerted and the amount of harvested crop, a corresponding stroke is set on the upper feed rollers.
    The two differential cylinders 10 preferably act symmetrically on the upper feed roller 3 in order to avoid tilting of the upper feed roller 3.
    Each of the double-acting differential cylinders 10 shown comprises a piston 11 with a piston rod 12. In the area of each differential cylinder 10, a so-called piston rod side 14 is interconnected with a so-called piston side 13 to form a rapid traverse circuit for the respective differential cylinder in such a way that, in addition to one provided via a feed line 15 An outlet pressure medium flow on the piston rod side 14 can be passed into an inlet 16 on the piston side 13.
    In the exemplary embodiment in FIG. 1, the two differential cylinders 10 shown, which act on the upper feed roller 3, are formed in parallel
    BE2018 / 5596 tet, ie it can be supplied with pressure medium from a common supply line 15, branches 15a, 15b branching off from the common supply line 15, each of which leads to a differential cylinder 10.
    These branches 15a, 15b lead to the respective inlet 16 of the respective differential cylinder 10, an outlet line 17 on the piston rod side 14 of the respective differential cylinder 10 being linked at a node 18 to the branch 15a, 15b of the respective differential cylinder 10, in order to thus discharge the pressure medium from the respective one Guide the piston rod side 14 of the respective differential cylinder 10 into the inlet 16 of the respective differential cylinder 10 and thus onto the piston side 13 of the same.
    1, the piston rods 12 engage at one end on the bearing 8 of the respective axis 7 of the upper feed roller 3 of the pair of feed rollers 2. Such an articulation of the piston rods 12 of the differential cylinders 10 close to the axis is preferred in order to implement direct power transmission.
    1, the two differential cylinders 10 are connected in parallel and can be supplied with pressure medium via a common supply line 15, it is also possible to provide separate supply lines 15 for the two differential cylinders 10. If separate supply lines 15 are provided for the two differential cylinders 10, a tilting of the upper feed roller can be counteracted.
    Fig. 2 shows a development of the feed mechanism 1 of Fig. 1, wherein in the embodiment of Fig. 2 cooperates with the inlet 16 of the piston side 13 of each differential cylinder 10, a shut-off element 19, via which the piston side 13 of the respective differential cylinder 10 can be shut off.
    Between the respective shut-off device 19 of the respective differential cylinder 10 and the respective inlet 16 of the respective differential cylinder 10 branches off a vent line 20 which, depending on the switching position of a switching valve 21, is either closed in the switching position of the switching valve 21 shown in FIG. 2, or in anBE2018 / 5596 whose switching position of the switching valve 21 is connected to a pressure medium tank 22.
    If the piston sides 13 of the differential cylinders 10 are to be emptied from the pressure medium, the shut-off elements 19 shown in FIG. 2 are closed and the switching valve 21 is transferred to the second switching position, in which the ventilation lines 20 are coupled to the pressure medium tank 22.
    Via the common supply line 15, pressure medium is guided in the direction of the differential cylinder 10, which then enters the piston rod side 14, moves the respective piston rod 12 upward in FIG. 2, and in this case pushes the pressure medium out of the piston side 13 via the ventilation lines 20 in the direction of promotes the pressure medium tank 22. This can be used for maintenance purposes.
    FIG. 2 also shows a pressure medium reservoir 23 and a pressure control valve 24. In the switch position in FIG. 2, the supply line 15 is coupled to the pressure medium tank 22. In a second switching position of the pressure control valve 24, the common supply line 15 can be coupled to a pump 25.
    The pressure control valve 24 serves to provide a defined pressure within the supply line 15. The pressure control valve 24 works in a manner familiar to the person skilled in the art here in order to set a predetermined pressure constantly.
    Instead of a pressure regulating valve 24, other hydraulic valves or valve arrangements familiar to the person skilled in the art can of course also be provided. A correspondingly selected valve or a valve arrangement only has to be suitable for setting a predetermined pressure in the supply line 15 or the associated hydraulic circuit. A corresponding valve arrangement could, for example, consist of a so-called seat-sealing 2/2-way valve and a seat-sealing 3/2-way valve, the 2/2-way valve closing or opening the supply line 15 depending on the switching position
    BE2018 / 5596 net and the 3/2-way valve connects the supply line to a pump or a tank via the 2/2-way valve.
    The pressure medium accumulator 23, which branches off from the supply line 15 between the differential cylinders 10 and the pressure control valve 24, serves to damp pressure peaks.
    Optionally, a further pressure medium reservoir can be provided, which is connected between the pressure control valve 24 and the pump 25, if a sufficient volume flow cannot be provided via the pressure medium pump 25.
    A modification of the hydraulic system 1 in FIG. 2 is shown in FIG. 3. 3, the shut-off devices 19, the ventilation lines 20 and the switching valve 21 can be used, but these assemblies are not shown in FIG. 3 for the sake of simplicity.
    In Fig. 3, several chokes 26, 28 are shown which can be used. In this case, not all of the chokes shown in FIG. 3 are used at the same time, rather only some of these chokes are used in combination with one another. The chokes are preferably used to minimize vibration.
    Damping via a throttle speed-dependent pressure drop for the upper feed roller 3 can be provided via the throttles 26. Such damping can also be done by coordinating the line diameter.
    3 shows a first throttle 26 which is assigned to the common feed line 15. 3 shows throttles 26, which are assigned to branches 15a, 15b. Then, when the throttle 26 assigned to the feed line 15 is used, the throttles 26 assigned to the branches 15a, 15b can be dispensed with. Either the throttle 26 assigned to the common feed line 15 is used, or alternatively the throttle 26 assigned to the branches 15a, 15b are used. Check valves 27 are connected in parallel with throttles 26.
    BE2018 / 5596
    In the exemplary embodiment in FIG. 3, further restrictors 28 are assigned to the outlet lines 17, to which non-return valves 29 are also connected in parallel.
    The direction of action of the check valves 27, 29 connected in parallel with the throttles 26, 28 results from FIG. 3.
    Then, if pressure medium is to be fed from the piston rod sides 14 of the differential cylinder 10 via the respective outlet line 17 to the inlet 16 of the respective differential cylinder 10, this pressure medium must flow via the restrictors 28 shown in FIG. 3. The check valves 29 are closed in this flow direction. Then, when the piston sides 13 of the differential cylinders 10 are to be emptied using the shut-off elements 19 and ventilation lines 20 shown in FIG. 2, pressure medium can be supplied to the respective piston rod side 14 of the respective differential cylinder 10 via the check valves 29.
    The differential cylinders 10 can be supplied with pressure medium, starting from the pressure medium accumulator 23 or starting from the pump 25, bypassing the throttles 26 via the check valves 27. The check valves 27 are closed in the reverse flow direction.
    The present invention accordingly proposes a feed mechanism 1 of a self-propelled forage harvester in which an upper feed roller 3 of a pair of feed rollers 2 can be pressed against the lower feed roller 4 via preferably two double-acting differential cylinders 10, the piston rod side 14 and the piston side being in the region of each differential cylinder 10 13 are connected to form a rapid traverse circuit. The differential cylinders 10 preferably engage axially and symmetrically on the upper feed roller 3 or the axis 7 of the same or the axle bearings 8 thereof. The pressure control valve 24 is used to provide a defined, constant pressure in the supply line 15. Pressure peaks can be buffered via at least one pressure storage medium 23 via BE2018 / 5596. Chokes 26, 28 can be used for damping.
    It can be provided that each of the differential cylinders 10 is assigned a sensor for stroke detection of the respective piston 11 and / or a sensor for pressure detection. If necessary, a tilting of the upper feed roller 3 can be detected via these sensors, namely when the measurement signals provided by the sensors differ from one another. In this case, the tilting can then be counteracted if the two differential cylinders 10 are controlled separately or independently of one another.
    The embodiment according to the invention is structurally simple. It is insensitive to the effects of ambient temperature. A desired pressing force between the feed rollers 3, 4 of the pair of feed rollers 2 can be provided simply and reliably. The differential cylinders 10 serve as an actuator for providing the pressing force. The differential cylinders 10 also provide end stops for the movement of the upper feed roller 3, preferably with end position damping.
    In the exemplary embodiment shown, the connection of the piston rod side 14 and the piston side 13 to provide the rapid traverse circuit is implemented via the lines 17, which are linked in the respective node 18 to the respective branch 15a, 15b of the respective differential cylinder 10. Alternatively, this can also be done via openings in the piston 11 of the respective differential cylinder 10.
    The exemplary embodiment described comprises two pairs of feed rollers, but it is also possible to provide three or more pairs of feed rollers on a feed mechanism designed according to the invention.
    BE2018 / 5596
    LIST OF REFERENCE NUMBERS
    infeed
    Feed roller pair upper feed roller lower feed roller
    axis
    camp
    axis
    camp
    handlebars
    differential cylinder
    piston
    piston rod
    piston side
    Piston rod side
    supply
    15a junction
    15b junction
    inlet
    outlet pipe
    junction
    shutoff
    vent line
    switching valve
    Pressure tank
    Accumulator
    Pressure control valve
    pump
    throttle
    check valve
    throttle
    check valve
    权利要求:
    Claims (10)
    [1]
    claims
    1. Infeed unit (1) of a forage harvester, with a first pair of infeed rollers consisting of an upper infeed roller and a lower infeed roller, and with a second pair of infeed rollers consisting of an upper infeed roller and a lower infeed roller positioned behind the first infeed roller pair, viewed in the flow direction, with at least one pair of infeed rollers in the area (2) the respective upper feed roller (3) can be pressed against the respective lower feed roller (4) via at least one double-acting differential cylinder (10) in order to provide a pressing force between them, characterized in that a piston rod side (13) and a piston side (14 ) of the or each differential cylinder (10) with the formation of a rapid traverse for the respective differential cylinder (10) are connected such that the pressure chambers of the piston rod side (13) and the piston side (14) are connected to each other so that a pressure medium flow from one to the other pressure chamber be conducted so that in addition to a pressure medium flow provided via a feed line (15), an outlet pressure medium flow on the piston rod side (14) can be conducted into an inlet (16) on the piston side (13).
    [2]
    2. Infeed mechanism according to claim 1, characterized in that two differential cylinders 10) act on the respective upper infeed roller (3).
    [3]
    3. Feed mechanism according to claim 2, characterized in that the two differential cylinders (10) of the respective upper feed roller (3) act symmetrically on the respective upper feed roller (3).
    [4]
    4. Infeed unit according to claim 2 or 3, characterized in that the two differential cylinders (10) of the respective upper feed roller (3) can be supplied with pressure medium in parallel, starting from a common supply line (15).
    BE2018 / 5596
    [5]
    5. Infeed mechanism according to one of claims 1 to 4, characterized in that a piston rod (12) of the respective differential cylinder (10) acts on an axle bearing (8) of the respective upper feed roller (3).
    [6]
    6. Intake mechanism according to one of claims 1 to 5, characterized in that with the inlet (16) of the piston side (13) of the respective differential cylinder (10) cooperates with a shut-off device (19).
    [7]
    7. Infeed mechanism according to claim 6, characterized in that between the inlet (16) and the shut-off element (19) branches off a ventilation line (20) which, depending on the switching position of a switching valve (21), either completed or for emptying the piston side (13) of the respective differential cylinder (10) is connected to a pressure medium tank (22).
    [8]
    8. Infeed mechanism according to one of claims 1 to 7, characterized in that a pressure medium reservoir (23) and / or pressure control valve (24) cooperates with the feed line (15) of the respective differential cylinder (10).
    [9]
    9. Infeed mechanism according to one of claims 1 to 8, characterized in that a sensor for stroke detection of the respective piston (11) or the respective piston rod (12) cooperates with the respective differential cylinder (10).
    [10]
    10. Infeed mechanism according to one of claims 1 to 9, characterized in that a sensor for pressure detection cooperates with the respective differential cylinder (10).
    类似技术:
    公开号 | 公开日 | 专利标题
    DE3820974C3|1996-03-21|Sealing member or roller
    BE1022156B1|2016-02-19|FEEDING DEVICE FOR A CHOPPING DEVICE OF A FIELD CHOPPER
    DE10303201A1|2004-08-12|Round baler for agricultural stalks
    EP3468340B1|2020-05-20|Control device, agricultural vehicle and method for operating an agricultural vehicle
    DE112012001075T5|2013-12-12|Clutch Actuator
    EP1008292B1|2003-11-19|Process and device for manufacturing highly compacted round bales of agricultural harvest produce
    BE1023350B1|2017-02-10|spring means
    DE2623492B2|1980-10-02|Pressure control device for rolling equipment
    DE2634530C3|1978-06-01|Draft control
    EP0387529A2|1990-09-19|Hydraulic circuit with control valve
    BE1025893B1|2019-10-01|Feed-in of a forage harvester
    DE2712878C2|1982-02-18|Roll baler for agricultural stalks with hydraulic locking
    AT203253B|1959-05-11|Control device for tractors
    EP1595439B1|2008-07-02|Device for picking up and pressing of harvested agricultural crop
    DE1482917C3|1979-08-30|Control device for maintaining a constant pressure of a fluid in an actuating cylinder of an agricultural machine
    EP2163149B1|2012-07-04|Intake device for a shredder device of a chaff cutter
    EP0918946B1|2000-03-08|Calender
    EP3459343A1|2019-03-27|Belt tensioning system for a round baler and agricultural round baler
    DE1703957C3|1976-08-26|Hydraulic pressure control device
    WO2021037517A1|2021-03-04|Agricultural machine having improved suspension
    DE102008039863A1|2010-03-04|Feed device for a forage harvester
    EP1595440B1|2008-03-26|Device for picking up and pressing of harvested agricultural crop
    DE2660078C2|1986-05-22|Load-dependent brake force regulator
    DE2814976A1|1979-10-04|DEVICE WITH HYDRAULIC PISTON-CYLINDER UNITS
    DE3113163A1|1982-10-28|Trailer hydraulic brake, especially for agricultural and forestry trailers
    同族专利:
    公开号 | 公开日
    BE1025893A1|2019-08-01|
    DE102017121941A1|2019-03-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US6584755B2|2001-08-14|2003-07-01|Deere & Company|Apparatus for adjusting the spacing and/or the contact pressure between two rollers of a kernel processor|
    EP1790210A2|2005-11-24|2007-05-30|Deere & Company|Feeding device for a forage harvester|
    EP2108248A1|2008-04-07|2009-10-14|CLAAS Selbstfahrende Erntemaschinen GmbH|Chaff cutter and intake device for same|
    EP2123146A1|2008-05-20|2009-11-25|CNH Belgium N.V.|Feed roll control system for a forage harvester|
    EP2481276A1|2011-02-01|2012-08-01|CLAAS Saulgau GmbH|Chopping device for self-propelled harvesters|
    DE19651694A1|1996-12-12|1998-06-25|Claas Ohg|Cutter for agricultural crop chopper with drum and counter-blade|
    DE102013004274B4|2013-03-13|2015-08-20|Claas Saulgau Gmbh|Feed device for a chopper of a forage harvester|
    法律状态:
    2019-10-02| FG| Patent granted|Effective date: 20191001 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017121941.2|2017-09-21|
    DE102017121941.2A|DE102017121941A1|2017-09-21|2017-09-21|Feed-in of a forage harvester|
    [返回顶部]