• 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:
    A knife (48) for the chopper drum (22) of a forage harvester (10) is provided with a body (82) having a cutting edge (66) and at least three axially spaced slots (66) extending transversely to the cutting edge (66). 64), which serve to receive screws (58) for fastening the knife (48) to a knife holder (54) of the chopper drum (22). The outer elongated holes (64) are provided with a bulge (84) extending parallel to the cutting edge (66) for receiving an eccentric tool (68) which can be inserted into the oblong hole (64) instead of the screw (58) for adjusting the position of the blade (48) with respect to Knife holder (54) provided.
    公开号:AT514532A2
    申请号:T523/2014
    申请日:2014-06-30
    公开日:2015-01-15
    发明作者:Joshua D Bacon
    申请人:Deere & Co；
    IPC主号:
    专利说明:

    Knife for a forage harvester and eccentric tool for position adjustment
    The invention relates to a knife for the chopper drum of a forage harvester, comprising a body having a cutting edge and at least three axially spaced slots extending transversely of the cutting edge for receiving screws for attaching the knife to a knife holder of the chopper drum.
    State of the art
    Forage harvesters are agricultural harvesters that pick up, chop, and dump the crop from a field on a transport vehicle. The crop may consist of field crops such as corn or grain, or already cut swathed plants, particularly grass is usually used as animal feed or for biogas production. The cutting operation is carried out by a rotating cutterhead with a number of circumferentially spaced knives which shred the crop in cooperation with a counter cutter.
    The knives are fastened by screw connections to knife holders of the cutterhead. Common blades have at least two transverse holes oriented transversely of the cutting edge through which the screws are inserted. Clamping plates are arranged between the screw heads and the knives (DE 199 18 553 A1). The knives, after replacement or excessive wear, are to be returned to a correct position relative to the counterknife, usually by loosening the screws, placing the knife in the correct position, and finally tightening the screws. It is tedious and time consuming to keep the knife in the correct position while tightening the screws.
    DE 22 09 672 A1 describes a forage harvester, the blades of which comprise transversely to the cutting edge-oriented elongated holes, into which screw connected to the holder. In this way, a guide of the knife is provided transversely to the adjustment direction. In addition, eccentric pieces are provided on both lateral ends of the knife, which engage in bores in the knife and can be rotationally adjusted. The eccentric pieces enable displacement of the knife in the direction of adjustment. After adjustment, the knives are finally fixed by centrally located in the eccentrics screws. This arrangement is relatively complex because the eccentric remain permanently on the knives.
    EP 2 386 200 A1 describes another forage harvester, in which the knives are likewise equipped with three oblong holes oriented transversely to the cutting edge, in which screws serving to fix the blade on the holder engage. Between the oblong holes, the knife each comprises an elongated aperture in which an eccentric tool cooperating with a bore in the knife holder, which serves to adjust the knife, engages. After adjustment, the screws are tightened. The elongated holes for the screws and the apertures for the eccentric tool are separated from each other and distributed over the length of the knife. As a result, the production is complex. Since the apertures for the eccentric tool are approximately one quarter of the length of the knife, relatively large moments are required to displace the eccentric tool and sufficient accuracy of adjustment is difficult to achieve. Finally, additional holes are required in the knife holder which can weaken the material and cause fatigue fractures.
    task
    The problem underlying the invention is seen in providing a knife for the chopper drum of a forage harvester and an arrangement for its positional adjustment, which does not have the disadvantages mentioned or to a lesser degree. solution
    This problem is solved according to the invention by the teaching of claim 1, wherein in the further claims features are listed, which further develop the solution in an advantageous manner.
    A knife for the chopper drum of a forage harvester comprises a body comprising a cutting edge and at least three axially spaced elongated holes extending transversely of the cutting edge for receiving screws for attaching the knife to a knife holder of the chopper drum. The outer longitudinal holes are provided with a parallel to the cutting edge extending recess for receiving a replaceable instead of the screw in the slot eccentric tool for position adjustment of the knife against the blade holder.
    The knife comprises a body having a cutting edge and three axial holes of the chopper drum juxtaposed, extending transversely of the cutting edge, through which a screw normally extends, for fixing the knife to a knife holder of a chopper drum. When the position of the knife is to be adjusted, the two outer screws are removed and the middle screw is loosened. The outer slots are each provided with a parallel to the cutting edge extending bulge. An eccentric tool is applied in place of one or both of the removed outer screws and extends into the recess. The operator can move the relevant end of the knife with the eccentric tool across the cutting edge until it has reached a suitable position. Subsequently, the other end of the knife is moved with the eccentric tool across the cutting edge until it has reached a suitable position. During these adjustments, the middle screw holds the knife firmly on the knife holder. Once the final position of the knife has been reached, the center screw is tightened, the eccentric tool removed, and the outer screws inserted and tightened. Thus, the adjustment of the knife has been carried out in a simple and quick manner and can be repeated with the next knife.
    The knives are preferably arranged between the knife holders and clamping plates, which are provided with holes for receiving the screws. The holes in the clamp plates serve as an abutment for the eccentric tool. Alternatively or additionally, holes in the knife holder, which also serve to receive the screws, serve as a bearing for the eccentric tool.
    A suitable eccentric tool comprises two rotatable members rotatably mounted on a support plate and rotatably connected to a handleable handle and connected to coaxial pins which are replaceable in the bores of the clamps and / or the bores of the knife holders and respectively one opposite the axis of the eccentric rotary elements, in each case one of the bulges insertable element of the eccentric tool is attached.
    The element may be pivotable or radially displaceable relative to the rotation element about an axis oriented transversely to the axis of rotation of the rotation element
    Spring force to be biased outwards. This makes it easy to install and expand. Alternatively, or in addition to the biasing of the element by spring force, the element may be coupled to the support plate and the rotation element by a mechanical connection such that it is pivoted or radially displaced upon rotation of the rotation element relative to the support plate about the axis oriented transverse to the axis of rotation of the rotation element Knife penetrate into the bulge in the slot of the knife.
    embodiment
    In the drawings embodiments of the invention described in more detail below are illustrated. It shows:
    1 shows a forage harvester in side view and in a schematic representation,
    2 is a fragmentary vertical section through the cutterhead and the attachment of the knives thereto,
    3 is a perspective view of an eccentric tool,
    Fig. 4 is a plan view of the knife and the eccentric tool in adjusting the knife position, and
    Fig. 5 is a section analogous to Figure 2, but with an eccentric tool inserted instead of the screw.
    A self-propelled forage harvester 10 shown in Figure 1 builds on a frame 12 supported by front and rear wheels 14 and 16. The operation of the field chopper 10 is carried out by a driver's cab 18, from which a harvested goods receiving device 20 in the form of a pick-up can be viewed. Gut picked up from the ground by means of the harvested receiving device 20, e.g. As grass or the like, is fed to a chopping unit, which here is composed of a cutter 48 occupied with chopping drum 22, which chops it in cooperation with a counter-blade 38 into small pieces and gives it a conveyor 24. In other forage harvesters, in particular attached or towed forage harvesters, the chopping unit could instead consist of a disc harvester 22 instead of a chopper drum 22. The crop leaves the harvester 10 to a trailer traveling by way of a height-adjustable and rotatable about the vertical axis discharge shaft 26th
    Between the chopper drum 22 and the conveyor 24 is a Nachzerkleinerungsvorrichtung 28 through which the material to be conveyed of the conveyor 24 is supplied tangentially.
    Between the crop collecting device 20 and the chopper drum 22, the material is transported through a feed conveyor with lower feed rollers 30, 32 and upper feed rollers 34, 36 mounted within a feed housing 50. The feed rollers 30 to 36 are also referred to as pre-press rollers because the upper feed rollers 34, 36 are biased against the lower feed rollers 30, 32 by hydraulic and / or spring force to precompress and better cut the crop between the feed rollers 30 to 36. In the following, directional indications, such as in the back and in front, refer to the forward direction V of the forage harvester 10, which runs from right to left in FIG.
    FIG. 2 shows a section of the chopper drum 22 with the knife 48 fastened thereto. The chopper drum 22 comprises a cylindrical shell 52 around the circumference and meandering axis of which a number of angular blade holders 54 are welded. Indians shown in Figure 2 above, trailing wall 56 of the knife holder 54 three axially juxtaposed bores are mounted, through which each extends a screw 58 which is screwed to the underside of the wall 56 with a threaded strip 58. The screw 58 also extends through a bore 62 in a clamping strip 60 and a slot 64 extending transversely of the cutting edge 66 in the body 82 of the blade 48. A washer (not shown) may also be disposed between the clamping strip 60 and the head of the screw 58.
    FIG. 3 shows an eccentric tool 68, which comprises a holding plate 69, on which two substantially cylindrical rotary elements 70 are rotatably supported. The rotation elements 70 are provided at their tops with hexagonal heads 72 or any other features with which an extended handle 74, e.g. a wrench 76 (see Figure 4) can be applied in order to rotate the rotating elements 70 manually with sufficient torque can. On its side spaced from the hexagonal heads 72, the rotary elements 70 are connected to a substantially cylindrical pin 78 arranged centrally with respect to the axis of rotation of the rotary elements 70. The pins 78 comprise eccentric elements 80 which are pivotally mounted at its top end about an axis oriented transversely to the longitudinal axis of the pin 78 on the pin 78 and biased by spring force to the outside.
    These elements 80 penetrate when adjusting the blades 48 in bulges 84 of the Messer48, as shown in Figures 4 and 5. The wedge shape and pivotability of the elements 80 make it possible to pull the pins 78 upwardly with the eccentric elements 80 when the adjustment operation is completed, since the elements 80 can then inwardly deflect against the spring force due to their wedge shape and can be pulled through the bore 62. The insertion of the pin 78 into the bores in the clamping plate 60, the knife 48, the knife holder 54 and the threaded plate 58, follows in a rotational position in which the element 80 extends into the slot 64. By rotating the pin 78 by means of the hexagonal heads 72, the element 80 is then pivoted into the bulge 84.
    As mentioned above, the body 82 of the knife 48 comprises three elongated holes 62 extending transversely of the cutting edge 66. It can be seen in FIG. 4 that the outer elongated holes 62 are each provided with a bulge 84 extending parallel to the cutting edge 66. In the chopping mode, one screw 58 each extends through each of the three elongated holes 64 and secures the knife 48 to the knife holder 54. For precise position adjustment of the knife 48, e.g. after replacement due to wear, the outer screws 58 are removed and only the middle screw 58 remains, in a somewhat loosened position, in order to still be able to hold the knife 48, but to be able to move it. Instead of the outer screws 58 then enters the eccentric 68, as shown in Figures 4 and 5shows. The pins 78 connected to the rotation elements 70 are respectively inserted into the bore 62 in the clamping plate 60 and into the bore of the knife holder 54, which otherwise receives the screw 58, and the elements 80 penetrate into the protrusions 84. A central recess 86 in the Bracket 69 avoids collision with the on-the-ground center screw 58. By rotating the hex heads 72 with the open-end wrench 76, the knife 48 is displaced transversely of the cutting edge 66 in the vicinity of its two ends. In this case, the operator can orient himself on the counter-blade 38. Once the correct position is found, the center screw 58 is tightened and the eccentric tool 68 is removed. Finally, the two outer screws 58 are inserted into the holes 62 and tightened instead of the pins 78 of the eccentric tool.
    权利要求:
    Claims (10)
    [1]
    1. A knife (48) for the chopper drum (22) of a forage harvester (10), comprising a body (82) having a cutting edge (66) and at least three oblong holes (66) extending transversely to the cutting edge (66). 64) for receiving screws (58) for attaching the knife (48) to a knife holder (54) of the chopper drum (22), characterized in that the outer elongated holes (64) extend parallel to the cutting edge (66) Bump (84) for receiving an eccentric tool (68) insertable in place of the screw (58) in the slot (64) for adjusting the position of the blade (48) relative to the knife holder (54).
    [2]
    A chopper drum (22) having circumferentially distributed knife holders (54) to which knives (48) according to claim 1 are screwed.
    [3]
    A cutterhead (22) according to claim 2, wherein the knife holders (54) are provided with bores for the screws (58) which are useable as abutments for the eccentric tool (68).
    [4]
    A cutterhead (22) according to claim 2 or 3, wherein the knives (48) are clamped between clamping bars (60) and the knife holder (54) and the clamping bars (60) are provided with bores (62) for the screws (58). which are usable as abutments for the eccentric tool (68).
    [5]
    5. eccentric tool (68) for use with a chopper drum (22) according to claim 3 or 4, comprising two rotatably about an axis rotatably mounted on a holding plate (69), with a handle handle (74) connected or connectable Rotationselemente (70) with coaxial pins (78) which are in the holes (62) of the clamping plates (60) and / or the holes of the knife holder (54) are replaceable and on each one with respect to the axis of the rotary elements (70) eccentrically arranged, in each case one the bulge (84) insertable element (80) of the eccentric tool (66) is mounted.
    [6]
    6. eccentric tool (68) according to claim 5, wherein the element (80) about an axis transverse to the rotational axis of the rotary member (70) oriented axis relative to the rotary member (70) is pivotable or displaceable in the radial direction.
    [7]
    7. eccentric tool (68) according to claim 6, wherein the element (80) is biased by spring force to the outside.
    [8]
    The eccentric tool (68) of claim 6, wherein the member (80) is coupled to the retaining plate (69) and the rotary member (70) such that upon rotation of the rotary member (70) relative to the retaining plate (69) about the axis of rotation pivoted axis of the rotary member (70) to penetrate the indentation (84) in the slot (64) of the knife (48) to make the knife (48).
    [9]
    9. Forage harvester (10) with a chopper drum (22) according to one of claims 2 to 4 and / or an eccentric tool (68) according to claim 5 or 6.
    [10]
    A method for positional adjustment of a knife (48) of a cutterhead (22), the knife comprising a body (82) having a cutting edge (66) and at least three elongated holes (64) extending transversely to the cutting edge (66). characterized in that for adjusting the position of the knife (48) only the middle screw (58) serves to receive the screw (58) for fastening the knife (48) to a knife holder (54) of the chopper drum (22) A knife (48) slidably engages the knife holder (54) while removing the outer screws (58) and inserting an eccentric tool (68) in place of an outer screw (58) in the elongated hole (64) comprising an eccentric member (80) in that a bulge (84) of the associated oblong hole (64) extending parallel to the cutting edge (66) engages.
    类似技术:
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    DE3439226A1|1986-04-30|MOWING DEVICE
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    EP3354126A1|2018-08-01|Cutter and shredding drum for a chaff cutter
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    DE102013006719A1|2014-10-23|Shredder and picking device for clippings
    DE102016222167A1|2017-12-14|Adjustment aid for assembling chopping knives on a chopper drum of a forage harvester, forage harvester equipped with it and associated method
    EP2011383B1|2018-04-25|Harvesting machine with cutting tool
    同族专利:
    公开号 | 公开日
    DE102013011088B4|2016-01-07|
    AT514532B1|2016-08-15|
    AT514532A3|2016-05-15|
    DE102013011088A1|2015-01-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE7143407U|1971-11-18|1972-02-17|Gebr Hagedorn & Co|COUNTER KNIFE ADJUSTMENT IN DRUM HEAD MACHINES|
    DE3138416C2|1981-09-26|1989-10-12|Claas Saulgau Gmbh, 7968 Saulgau, De|
    DE3408354A1|1984-03-07|1985-10-17|Gebr. Leitz Gmbh & Co, 7082 Oberkochen|Profiled cutter head|
    DE19918553A1|1999-04-23|2000-10-26|Deere & Co|Mincing drum for agricultural and industrial produce, with throwing scoop surface on leading edge of cutter holder|
    DE202010006714U1|2010-05-12|2010-08-05|Maschinenfabrik Bernard Krone Gmbh|Forage|DE102016222167A1|2016-06-10|2017-12-14|Deere & Company|Adjustment aid for assembling chopping knives on a chopper drum of a forage harvester, forage harvester equipped with it and associated method|
    DE102016214758A1|2016-08-09|2018-02-15|Deere & Company|Chopper drum for a forage harvester with knife holders adjustable into an inoperative position|
    DE102016123174A1|2016-11-30|2018-05-30|Claas Saulgau Gmbh|Chopping knife of a chopper drum of a forage harvester|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102013011088.2A|DE102013011088B4|2013-07-03|2013-07-03|Knife for a forage harvester and eccentric tool for position adjustment|
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