• 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 feed assembly for a forage harvester (10) has two feed rollers (30, 34) which are oriented parallel to one another and can be driven in opposite directions, between which a crop flow can be passed. A metal detector (40) for detecting ferromagnetic foreign bodies in the crop flow is arranged in the interior of one of the intake rollers (30). At least one of the draw-in rollers (34) has a jacket made up of segments (44) made of non-magnetizable metal that follow one another in the circumferential direction. An intermediate element (58) made of an electrically insulating material is arranged between segments (44) following one another in the circumferential direction.
    公开号:BE1021657B1
    申请号:E2013/0058
    申请日:2013-01-30
    公开日:2015-12-22
    发明作者:
    申请人:Deere & Company；
    IPC主号:
    专利说明:

    One-to-one assembly for a forage harvester
    The invention relates to a collection assembly for a forage harvester, with at least two mutually parallel, oppositely driven feed rollers between which a Erntegutstrom is guided, a metal detector for detecting ferromagnetic foreign bodies in the crop is arranged in the interior of one of the feed rollers, at least one of the feed rollers one Having circumferentially successive and provided with outwardly extending portions provided segments of non-magnetizable metal shell and between adjacent segments each have an intermediate element is arranged.
    State of the art
    In agricultural emtemaschinen there is a risk that stale foreign bodies are absorbed. This is especially true when Emtegut is taken directly from the ground, for example, when a swath is picked up by means of a pick-up. In order to avoid damage to the Emtemaschine, detection devices for the detection of ferromagnetic Fremdkörpem are known. These so-called metal detectors are usually arranged in Feldschackle in a lower feed roller and comprise one or more permanent magnets which generate a magnetic field which extends into the gap between the lower feed roller and an overlying feed roller through which the recorded Emtegut is fed to a Hückseleinrichtung , In one or more side by side arranged, connected to a detection and stopping device induction coils, a voltage is induced, faits a ferromagnetic body is contained in the Emtegut and therefore the magnetic field changes. As soon as the voltage delivered by the induction coil exceeds a threshold, the feed conveyor is automatically stopped to prevent damage to the latch.
    The two mentioned feed rollers are usually made of non-magnetizable material, be it austenitic steel (EP 0 832 551 A2) or stainless steel (DE 31 29 693 C2). The feed rollers described there are one-piece cylinder with attached drivers for detecting and conveying the crop (EP 0 832 551 A2) or composed of axially extending strips having bent to the outside, the driver forming sections (DEJ31 29 693 C2). In the prospectus considered "Fendt Katana 65", note Katana / 1.1-DE / 11-11 / 20.0-E, a front, obéré pickup roller of a forage harvester is shown, their apparent stainless steel, toothed driver each between two about U -haped sheets are clamped, which in their entirety form the shell of the pre-press roller.
    In the case of the previous intake assemblies, in the immediate vicinity of the metal detector relatively large bodies made entirely of iron rotate, which due to the outwardly extending drivers are not exactly rotationally symmetrical. In addition, the obéré feed roller moves vertically, depending on the crop throughput. The rotating and also linearly moving feed rollers lead to a not inconsiderable interference signal in the induction coil and reduce the detection sensitivity of the metal detector.
    To solve this problem, it has been proposed in DE 298 02 648 U1 to produce the driver and stiffening rings of the feed roller made of material with poor conductivity and to avoid direct contact between the entrainment and stiffening rings. However, the body of the feed roller is still a tubular steel element.
    Aufqabe
    The problem underlying the invention is seen in providing a feeder assembly for a forage harvester whose feed roller causes a background signal of the induction coil (or possibly other detection means) of the metal detector which is less than the prior art. Lösunq
    This problem is inventively achieved by the teaching of claim 1, wherein in the other claims features are listed, which further develop the solution in an advantageous manner.
    An intake assembly for a forage harvester contains at least two intake rollers which are oriented parallel to one another and can be driven in opposite directions, between which a crop material flow can be passed in the harvesting operation. An equipped with a magnet and at least one induction coil or other magnetic field sensor metal detector for
    Detection possibly contained in Emtegutstrom ferromagnetic foreign body is arranged in the interior of one of the feed rollers, usually in the lower feed roller. At least one or both of the feed rollers (in particular the obéré feed roller, which is also linearly movable relative to the other feed roller) has a jacket, which is composed of individual segments. The non-magnetizable metal segments follow each other in the circumferential direction. Between successive segments, an intermediate element made of an electrically insulating material is arranged in each case.
    It is therefore proposed to divide the feed roller in the direction of rotation into smaller segments and to install between the segments electrically insulating intermediate elements, which may for example consist of plastic. Thus, under electromagnetic observation no longer a large, metallic body moves in the magnetic field of the metal detector, but several, smaller bodies, which leads to the fact that the eddy currents resulting from the movement of the body in the magnetic field and the resulting magnetic field changes are reduced. This also reduces the noise component of the induction voltages in the induction coil and improves the detection sensitivity of the metal detector.
    In a preferred embodiment, each segment at the leading and trailing ends each have an at least approximately radially extending portion. The intermediate elements are in each case arranged between the trailing portion of the rotationally leading segment and the leading portion of the trailing in the direction of rotation segment, i. sandwiched between the two sections. The sections thus serve in addition to forming a mounting option for a driver to promote the Emteguts or directly as a driver. However, other embodiments were conceivable in which the non-conductive intermediate element is located, for example, between a region of a segment bent more or less outward and a region of the adjacent segment extending parallel to this region but angled inward. The carriers for conveying the crop can then be attached to another part of the segment (welded or screwed on).
    To improve the conveyance of the crop, the intermediate elements and / or the trailing portions of the segments may comprise radially outwardly projecting serrations.
    In addition, the intermediate elements may have a trailing shoulder which rests on the rotationally leading portion of the respective subsequent segment to improve the stability of the intermediate element in conveying the crop.
    For Erntegutförderung can also be a front, provided with serrations entrainment or. Serve VerschleiBelement which is attached to the leading side of the trailing portion of the segments in the direction of rotation.
    For the mechanical connection between the segments and the intermediate element are preferably used fasteners of non-magnetizable material, which extend through openings in the sections and in the intermediate elements and, if present, in the driver or wear element.
    The adjoining teeth profiles of the intermediate elements, the teeth of the trailing portions and the driver or VerschleiBelements are preferably aligned with each other in the axial direction and radial direction.
    Ausführunasbeispiel
    In the drawings, a below-described embodiment of the invention is illustrated. It shows:
    1 shows a Feldhacksler in side view and in a schematic representation,
    2 is a perspective view of the front, upper feed roller of Feldhackslers,
    3 shows a section through the feed roller of Figure 2, and
    4 is a perspective view of the intermediate element of the feed roller of Figure 2.
    A self-propelled forage harvester shown in FIG. 1 builds on a frame 12 supported by front and rear wheels 14 and 16. The operation of the Feldhackslers 10 takes place from a driver's cab 18, from which a Erntegutaufnahmevorrichtung 20 in the form of a pick-up is visible. By means of
    Erntegutaufnahmevorrichtung 20 picked up from the ground Good, z. As grass or the like, is fed to a Hückselaggregat, which is constructed here of a Hobselmessern 48 occupied Hobeltrommel 22, which hacks it in cooperation with a counter-blade 38 into small pieces and it gives a conveyor 24. In other forage harvesters, in particular mounted or towed field hoppers, the hagging unit could also consist of a disc wheel chopper instead of a hauling drum 22. The estate leaves the Emtemaschine 10 to a moving trailer on a height-adjustable and rotatable about the vertical axis discharge shaft 26. Between the hacksaw drum 22 and the conveyor 24 is a Nachzerkleinerungsvorrichtung 28 through which the material to be conveyed of the conveyor 24 is fed tangentially.
    Between the Emtegutaufnahmevorrichtung 20 and the Hobeltrommel 22, the estate is transported by a feed conveyor with lower feed rollers 30, 32 and upper feed rollers 34, 36 which are mounted within a Einzugsgehâuses 50. The feed rollers 30 to 36 are also referred to as pre-press rollers, since the upper feed rollers 34, 36 are biased by hydraulic and / or spring force against the lower feed rollers 30,32 so that the Emtegut between the feed rollers 30 to 36 is pre-compressed and cut better can. In the following, directional details, such as rear and front, refer to the forward direction V of the forage harvester 10, which runs in the figure 1 from right to left.
    Within the front, lower feed roller 30, a metal detector 40 is arranged, which in a conventional manner adjacent juxtaposed permanent magnets and induction coils or other suitable sensors for detecting the respective magnetic field strength or their change includes. Reference may be made to the state of the art according to EP 0 702 248 A2, the disclosure of which is incorporated by reference into the available documents. The magnetic field sensor of the metal detector 40 is connected to an evaluation circuit 42, which in turn is coupled to an input and display device 100 in the cab 18 to indicate to the operator the presence of a ferromagnetic foreign body in the crop stream between the infeed rollers 30 and 34. In addition, the evaluation circuit 42 causes an immediate stop the feed rollers 30 to 36 in the case of a response. Reference is made to the prior art according to DE 10 2009 002 849 A1, the disclosure of which is incorporated by reference into the present documents.
    Figure 2 shows a perspective view of the upper, front feed roller 34, which cooperates with the lower, oppositely rotating, front feed roller 30, and Figure 3 shows a section through the feed roller 34. The feed roller 34 is set, as best with reference to the figure 3 can be seen, composed of a plurality of segments 44, each extending in the radial direction across the width of the feed roller 34, but only one part of the circumference in the circumferential direction, because in the present embodiment ten segments 44 are distributed around the circumference of the feed roller 34 , In other embodiments, however, the number of segments 44 could be smaller or larger.
    The segments 44 each include a central portion 46 that is flat or convex curved in itself or has an additional stiffening fold and extends in the circumferential direction, one in the direction of rotation in the harvesting operation, which is represented by the arrow 54, leading, compared to the middle Part 46 outwardly angled portion 52 which extends approximately radially and a trailing portion 56, which is also angled towards the middle part 46 to the outside and extends approximately radially. The trailing portion 56 extends further radially outward than the leading portion 52.
    Between the trailing portion 56 of each segment 44 and the leading portion 52 of each trailing in the direction of rotation segment 44, an intermediate element 58 is arranged, which is shown in perspective in Figure 4. The intermediate element 58 also extends in the axial direction across the width of the feed roller 34, although it would also be conceivable to subdivide it in the axial direction into smaller elements. It comprises a radially inner region 60 of rectangular cross-section which extends in the radial direction to the radially outer end of the leading section 52 of the adjacent segment 44. A radially outward portion 62 of the intermediate member 58 includes a rearward shoulder 64 that radially abuts and rests against the radially outward edge of the leading portion 52 of the adjacent segment 44. From the rearward end of the shoulder 64 in the direction of rotation, the radially outer region extends obliquely outwards and counter to the direction of rotation from. In the radial direction outside the material forming the shoulder 64, the outer region 62 of the intermediate element 58 is provided with tooth-shaped serrations 66. Coincident spikes are also formed in the radially outer region of the trailing portion 56 of each segment 44.
    At the leading in the direction of rotation surface of the trailing portion 56 of each segment 44 is located on a separate Mitnehmer- or VerschleiBelement 68, which also extends across the width of the feed roller 34, although it would also be conceivable to divide it in the axial direction into smaller elements , It is of rectangular cross-section and also provided with serrations in its radially outward direction, which are congruent with the serrations 66 of the intermediate element 58 and the radially outer region of the trailing section 56 of each segment 44, i. are aligned with each other in the axial direction and the radial direction. These prongs intervene in the Emtegut and transport it in the flow direction.
    In each case, a driver or wear element 66, a trailing portion 56, an intermediate element 58 and a leading portion 52 are interconnected by a fastener 70 in the form of a screw whose head rests on the Mitnehmer-VerschleiBelement 66 and the thread with a leading portion 52 adjacent mother 72 cooperates and whose shaft extends through openings or holes in the driver or wear element 66, in the sections 56,52 and the intermediate member 58. Of course, the head could also abut the leading portion 52 and the nut 72 on the driver or wear element 66. In each case a plurality of (in the illustrated embodiment, six) fasteners 70 are arranged in the axial direction next to each other, although this number could also be chosen larger or smaller.
    At the axially outer ends of the feed roller 34, side rakes 74, known per se, are mounted, which are welded to the middle parts 46 and the sections 52 and 56 of the segments 44. Since the sensitivity of the metal detector 40 to the outer edges of the conveyor channel is relatively low, this electrical connection between the side blanks 74 and the segments 44 does not interfere with the signal from the metal detector 40. Radially extending end plates 76 connect the side blanks 74 and the segments 44 to a drivable drive shaft 78 on one side of the feed roller 34 and to an axis 80 rotatable relative to the feed roller 34 on the other side of the feed roller 34.
    The intermediate elements 58 are made of electrically insulating material, preferably a plastic, such as ultra-high molecular weight (UHMW) polyethylene. The VerschleiBelemente 68 may consist of such plastic. The fasteners 70, nuts 72 and segments 44, as well as the side blanks 74 and end plates 76, are made of non-magnetic steel, e.g. Austenitic or stainless
    Stainless steel. It would still be possible as a refinement to electrically isolate the fasteners 70 by suitable sleeves from the trailing portion 56.
    After all, the feed roller 34 according to the invention is composed in the circumferential direction of a plurality of segments 44, which are electrically isolated from each other by the intermediate elements 58. As a result, only smaller, electrically interconnected elements move in the magnetic field of the metal detector 40, compared to large cylindrical shells previous feed rollers. Thus, during the linear and rotary movement of the feed roller 34 in the magnetic field less interference of the magnetic field caused by the movement of eddy currents than before, which reduces the noise component in the signal of the metal detector 40 and its sensitivity can be larger. At the same time, the feed roller 34 is mechanically relatively stable and durable due to the angled sections 52, 56, the intermediate elements 58 and the entrainment or VerschleiBelemente 68 despite low material usage and thus at low mass.
    权利要求:
    Claims (8)
    [1]
    claims
    1. collection assembly for a Feldhacksler (10), with at least two mutually parallel, counter-rotating feed rollers (30, 34), between which a Erntegutstrom is guided, wherein a metal detector (40) for detecting ferromagnetic foreign bodies in the crop in the interior of one of the feed rollers (30) is arranged, at least one of the feed rollers (34) comprises a circumferentially successive segments (44) constructed of non-magnetizable metal shell and between circumferentially successive segments (44) each have an intermediate element (58) is arranged, characterized in that the intermediate elements (58) are made of an electrically insulating material.
    [2]
    2. Feeder assembly according to claim 1, wherein each segment (44) at the leading and trailing ends each having an at least approximately radially extending portion (52, 56) and the intermediate elements (58) each between the trailing portion (56) in the direction of rotation leading segment (44) and the leading portion (52) of the rotationally trailing segment (44) are arranged.
    [3]
    3. A feeder assembly according to claim 2, wherein the intermediate members (58) and / or the trailing portions (56) of the segments comprise radially outwardly projecting serrations (66).
    [4]
    4. Feed assembly according to claim 2 or 3, wherein the intermediate elements (58) have a trailing shoulder (64), which is supported on the direction of rotation leading portion (52) of the respective subsequent segment (44).
    [5]
    5. Feeding assembly according to one of claims 2 to 4, wherein in each case a front, serrated Mitnehmer- or VerschleiBelement (68) on the leading side of the direction of rotation trailing portion (56) of the segments (44) is mounted.
    [6]
    6. Feeding assembly according to one of claims 2 to 5, wherein fastening elements (70) of non-magnetizable material through openings in the sections (52,56) and in the intermediate elements (58) and possibly in the driver or wear element (68 ).
    [7]
    7. intake assembly according to claim 5 or 6 with reference back to claim 3, characterized in that the abutting prongs (66) of the intermediate elements (58) and the prongs (66) of the trailing portions (56) and the tines of the driver or Wear element (68) are aligned with each other in the axial direction and the radial direction.
    [8]
    8. Feldhacksler (10) with a Hückselaggregat and the Hackselaggregat upstream feeder assembly according to one of the preceding claims.
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    同族专利:
    公开号 | 公开日
    DE102012201906B4|2017-03-30|
    DE102012201906A1|2013-08-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3129693A1|1980-10-01|1982-05-19|Sperry Corp., 17557 New Holland, Pa.|"INPUT ROLLER, ESPECIALLY FOR FIELD CHOPPER"|
    EP0064566A1|1981-05-09|1982-11-17|Klöckner-Humboldt-Deutz Aktiengesellschaft|Metal detector apparatus in crop harvesters|
    GB2103762A|1981-08-10|1983-02-23|Sperry Corp|Feed rolls|
    EP1498019A1|2003-07-17|2005-01-19|Maschinenfabrik Bernard Krone GmbH|Harvester with a metal detecting device|
    US5504428A|1994-09-16|1996-04-02|Deere & Company|Magnetic metal detector mounted in a feed roll of a harvisting machine|
    US5797250A|1996-09-27|1998-08-25|Deere & Company|Forage harvester feed roll assembly designed for minimizing false tripping of a metal detector system|
    DE29802648U1|1998-02-05|1998-04-09|Stopp Werner Dipl Ing|Feed roller for a field harvester|
    DE102009002849A1|2008-07-11|2010-01-14|Deere & Company, Moline|Drive system for a feed conveyor of a harvester|CN105684658A|2014-11-26|2016-06-22|成都锦汇科技有限公司|A rice and wheat thresher|
    DE102018003555B4|2018-05-03|2020-03-12|Maschinenfabrik Bernard Krone GmbH & Co. KG|Feed roller for a harvester|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102012201906.5A|DE102012201906B4|2012-02-09|2012-02-09|Feed assembly for a forage harvester|
    DE102012201906.5|2012-02-09|
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