• 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 baler has a bale chamber 20 and a needle 40 movable through the bale chamber to transfer a strand of string from one side of the bale chamber to a knotter 24 positioned on the opposite side, the rope being gripped by a tip of the needle. In the invention, air is directed under pressure to the tip of the needle. The air flow prevents harvesting material from being caught in the knots formed by the button layer 24.
    公开号:BE1018204A3
    申请号:E2008/0362
    申请日:2008-06-30
    公开日:2010-07-06
    发明作者:
    申请人:Cnh Belgium Nv；
    IPC主号:
    专利说明:

    IMPROVEMENTS IN SQUARE BALL PRESSES
    Field of application of the invention
    This invention relates to square balers and more particularly concerns the mechanisms used to tie the bales together with pieces of string and to make knots in the rope.
    Background of the invention *
    Balers are machines that can have their own drive, but are more often towed and driven by a tractor's PTO. There are two main types, namely round balers and square balers. Round balers are used to produce cylindrical bales that are normally wrapped with a mesh or foil after they have been formed. Square balers produce bales with rectangular sides that are tied together with separate loops of rope at a certain distance from each other across the width of each bale.
    This invention only applies to square balers. In order to explain by way of background the way square balers are built, reference will be made to Figure 1 of the accompanying drawings. This drawing is based on patent US 5 347 920, which has been introduced here for reference, and will only be described here to the extent that it is necessary to understand this invention.
    The baler includes a main frame 10 equipped with a pair of ground contacting wheels 12 and a tow bar 14 arranged to be attached to a tractor (not shown). A pick-up mechanism 16 picks up harvesting material, typically this straw (or similar harvest residues) lying on the ground after being thrown in swaths on the ground by a combine harvester. The harvest material is supplied to a supply chamber 18 from where it is transferred to a bale chamber 20 in which a bale of harvest material is formed.
    A plunger 22 moves back and forth inside the bale chamber 20 to act on wadding crop material that was transferred from the feed chamber 18 to the bale chamber 20 and to compress it into a bale that gradually formed along the bale chamber 20 during forming. be moved from left to right, as shown in Figs. 1. A fully formed bale is tied with rope by means of a rope. a button pad 24 and falls out of the machine at the back.
    The bale chamber 20 contains a front part 30 with fixed dimensions and a rear part 32 the dimensions of which can vary by means of movable upper and lateral rails 34. A tension control mechanism 36 is provided to move the rails 34 to thereby cross-section the zone where the bale is formed to vary and thus control the density of the bales produced.
    Since several strands are to be wound around each bale, a plurality of individual knots 24 are arranged transversely and at a certain distance apart at the top of the bale chamber 20 and they all operate in the following identical manner. Tying a strand of rope around a bale starts with clamping the beginning of a piece of rope 30 in a rope holder from which it protrudes downwards over a knotter beak and a rope guide element through the bale chamber 20. The rope holder, the knotter beak and the guide element of the button fender should not be described in detail here since this invention does not immediately relate to the operation of the button pad. The method of button layers per se is well known and described in numerous published patent specifications.
    • j
    As the harvest material is compressed and gradually moved to the end of the bale chamber 20, the rope is taken along so that it extends along the top of the bale, back down along the front surface of the bale and below the bottom surface of the bale. bale runs. From there, each rope extends through an eye in the front end of a corresponding curved needle 40 that forms part of a hinged needle assembly 42.
    A star wheel 44 which is operatively coupled to the button layers 24 controls the length of the bale as it is gradually formed. When a bale has been formed to a desired extent, the binding operation is started by precisely moving the needle assembly 42 to raise the tip of each needle 40 through the bale chamber 20 and into the region of the knotter beak and the rope holder of the knot fodder. take a piece of rope on the tail along with the rope on the head into the rope holder. At that moment the head and tail of the rope are knotted together by the knotter's mouth of the knotter. To release the knotted loop from the knotter 24, both strands are cut off from the rope holder by moving the rope guide element, which supports a knife, across the knotter's jaw and, in the meantime, removes its knot.
    A person skilled in the art will readily appreciate that the cyclic movement of the needle assembly 36 not only provides for the start of a piece of string to the rope holder 32 to bind a fully formed bale, but at the same time causes the formation of a new bale by to supply a new piece of rope to the rope holder 32.
    A knotter that works that way pulls rope from a single feed roll and produces a loop of rope with a single knot. Other knotting systems are known in which two lengths of rope are pulled from separate rolls and knotted together at the beginning and the end of the formation of each bale. In such so-called double knots, after a first knot has been laid in the two lengths of rope, at the end of the formation of a bale, the two knotted strands are cut from their respective feed roll and a second knot is formed in the two strands from the two feed rollers to start the next bale. Such double knots have the advantage that the rope does not have to be held securely in the knotsayer during the bale formation phase and that the rope does not have to drag over the surface of the bale while the bale is being formed, simply moves with the bale as it grows larger. This invention is applicable to balers with single button layers and double button layers.
    A problem occurring in the knotting mechanisms of large balers, especially those with double knots, is caused by an accumulation of harvest material around the knot layer 24, which was raised by the needle 40, as well as by an accumulation of harvest material on and around the eye of the needle, which often contains a pair of guide rollers to gently guide the rope through the needle. When such harvesting material becomes trapped in a knot while it is being formed, the knot may become weakened and may later come off.
    In this context it should also be noted that the plunger 22 of the baler contains needle eyes. The needles cannot pass through the compressed material and therefore they are raised when the plunger is in its fully compacting position. The needles then pass through the slit in the front of the plunger. Harvest material can hang above the zone where the needles enter the bale forming chamber. It can also contain harvest material, the eyes of the needles. All this harvest material can be picked up with the top of the needle as it is not sharp, but contains two rolls. If there is crop hanging on the rollers, it may be difficult for the top rope to pick up the top rope, resulting in poor binding.
    Summary of the invention
    With the intention of limiting the aforementioned problem, a baler is provided that contains a bale chamber and a needle movable through the bale chamber to pass a strand of string from one side of the bale chamber to a button layer located on the opposite side, the rope is grasped by a tip of the needle, characterized in that means are provided on the needle to direct a jet of air under pressure to the tip of the needle.
    It may be advantageous to maintain the air flow while the needle is stationary and a bale is being formed. To save energy and avoid unnecessary noise, the supply of pressurized air is preferably discontinuous and timed to coincide only with certain phases of the needle operating cycle.
    i
    If the air pressure is timed to be present as the needle passes through the bale chamber to the button pad, the air causes crop material to be moved out of the needle path.
    If the pressurized air is timed to be present when the tip of the needle is near the button pad, the airflow will serve to keep the button pad free of crop material.
    The air under pressure can thereby be timed such that it is present during the return of the needle through the bale chamber away from the button layer to keep the tip of the needle free of harvesting material.
    It may be practical if a valve for controlling the supply of air under pressure is connected to or inserted in the axis about which the needle pivots.
    As an alternative to attaching pressure tubes to the outer surface of a needle ,. For example, a needle itself can be formed in one piece with a passage through which air can be directed to its point.
    Brief description of the drawings
    The invention will now be further described by way of example, with reference to the accompanying drawings, in which:
    Figure 1, as previously described, is a schematic side view of a rectangular baler,
    Figure 2 shows a side view of a needle assembly of a baler according to the invention, and
    Figure 3 is a section along the line III-III in Figure 2.
    i
    Detailed description of the preferred embodiment (s)
    With reference to Figures 2 and 3, a needle assembly 42 is shown which includes a needle 40 which, at its point, contains a pair of spaced apart rollers of which only the axes of the pivot points 44 are shown in Figure 2. The rope to be tied around a bale, and unwound from a feed roll by means of a tensioning device (neither of which is shown in Figure 1) passes between the two rollers attached to the tip of the needle 40, and then around three sides of the bale in formation. When the bale is to be tied, the needle moves through the bale chamber 20, as represented by the arrow in Figure 2, to complete the bale encircling and to offer the strand of string in the knotter 24.
    In this invention, compressed air is directed past the needle 40 and a jet of air is directed to the tip of the needle. The conduit into which the compressed air flows, in the case of the embodiment shown in Figures 2 and 3, is formed as an integral part of the needle 40. As shown in the cross-section of Figure 3, the needle more particularly comprises a central body portion 40a, a tubular member 40b along its upper edge to guide compressed air to the tip of the needle and a rope guide member 40c in the form of an inverted "U" along the lower edge of the needle.
    In this way it is not essential for the compressed air line that it forms one piece with the needle. It may also contain a separate pressure line that is appropriately held in place on the surface of the needle.
    The air jet at the tip of the needle serves to move crop material during the movement of the needle to the corresponding button pad and to prevent material from piling up at the edge of the needle as the needle moves through the openings provided in the front from the plunger. When the needle arrives at the button finder, the compressed air blows harvested material out of the button fuser and during the return movement of the needle, the air serves to keep the rope-gripping rollers of the needle clean.
    The supply of pressurized air can be discontinuous and timed to coincide only with certain phases of the operating cycle of the needle, such as during its upward movement through the bale chamber, when it is close to the button pad and / or during the return movement.
    A slide valve can be used to control the supply of air under pressure, in which case the slide can be coupled to or formed as a part of the shaft about which the entire needle assembly pivots.
    The needle assembly 42 includes a yoke 46 to which all needles 40 are connected. The yoke 46 is an axis extending therebetween and supported by two arms 43 arranged on either side of the bale chamber and capable of pivoting about pivot point 48. As shown in Figure 2, the yoke 46 is hollow and serves as compressed air buffer. The needles 40 are connected to the yoke 46 in such a way that air is led from the yoke 46 to each needle cartal 40b via a passage 47. Furthermore, air from the compressor of the tractor or from a reservoir on the baler can be led into the yoke 46 formed via at least one of the arms 43 via the pivot point 48 and via a passage 45, wherein stiff air tubes can be used to transport the compressed air.
    权利要求:
    Claims (10)
    [1]
    Claims 1. A baler with a bale chamber and a needle movable through the bale chamber for passing a strand of rope from one side of the bale chamber to a button layer located on the opposite side, wherein the rope is gripped by a point of the needle, characterized in that means be provided on the needle to direct a jet of air under pressure to the tip of the needle.
    [2]
    2. Baler according to claim 1, characterized in that the supply of the pressurized air is discontinuous and timed to coincide only with certain phases of the needle delivery cycle.
    [3]
    A baler according to claim 2, characterized in that the pressurized air is so timed to move harvesting material from the path of the needle while the needle passes through the bale chamber to the button layer.
    [4]
    4. Baler according to claim 2 or 3, characterized in that the air under pressure is timed such that it is present when the tip of the needle is in the vicinity of the button pad, wherein the air flow is effective to keep the button pad free of harvest material.
    [5]
    A baler according to claim 2, 3 or 4, characterized in that the pressurized air is so present that it is present during the return of the needle through the bale chamber away from the button layer to keep the tip of the needle free of harvesting material. .
    [6]
    Bale press according to one or more of claims 2 to 5, characterized in that a valve for controlling the supply of air under pressure is connected to or incorporated in the axis around which the needle pivots.
    [7]
    A baler according to one or more of the preceding claims, characterized in that a line along which the air flows under pressure to the tip of the needle forms a part of the needle.
    [8]
    A baler as claimed in claim 6 or 7, characterized in that the needles are connected together to a yoke which is arranged as an extension between and supporting by two pivotally mounted arms, and characterized in that the yoke is hollow and serves as compressed air buffer.
    [9]
    A baler according to claim 8, characterized in that the air from the yoke is led into a channel in each needle that directs air under pressure to the tip of the needle.
    [10]
    10. Baler as claimed in claim 8 or 9, characterized in that compressed air is guided into the yoke through a pivot point or at least one of the arms carrying the yoke.
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    同族专利:
    公开号 | 公开日
    DE602008002645D1|2010-11-04|
    EP2011385B1|2010-09-22|
    GB0712921D0|2007-08-15|
    AT481869T|2010-10-15|
    EP2011385A1|2009-01-07|
    US20090007805A1|2009-01-08|
    GB2450716A|2009-01-07|
    US7854195B2|2010-12-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3020829A|1961-04-27|1962-02-13|Pearson Fred|Blower for hay baler|
    AU606668B2|1987-04-03|1991-02-14|Ford New Holland Australia Limited|Improvements relating to hay balers|
    EP0561061A1|1992-03-16|1993-09-22|New Holland Belgium N.V.|Twine force sensing apparatus for use on a rectangular baler|
    FR2737385A1|1995-08-04|1997-02-07|Fortschritt Erntemaschinen|METHOD AND CIRCUIT FOR CONTROLLING A CLEANING FAN AND A CENTRAL LUBRICATION SYSTEM FOR A LARGE PARALLELEPIPEDIC BALE PRESS|
    EP1813788A1|2006-01-31|2007-08-01|Deere & Company|Agricultural machine|
    WO2008033597A1|2006-09-12|2008-03-20|Agco Corporation|Knotter blower for agricultural balers|US10947000B2|2015-12-17|2021-03-16|Octinion Bvba|Labeller and method for agricultural bale press|GB2033439B|1978-11-10|1982-10-13|Newroyd Ltd|Feed device and method for feeding yarn or other textile material|
    US4262944A|1979-01-30|1981-04-21|Johnson Associates, Inc.|Broccoli bunching and tying machine|
    DE3339331C2|1983-10-29|1988-12-29|Hacoba Textilmaschinen Gmbh & Co Kg, 5600 Wuppertal, De|
    US7458620B2|2007-02-09|2008-12-02|Deere & Company|Baler needle clamp arrangement for facilitating side-to-side adjustment of outer needle end|US9003750B2|2011-01-12|2015-04-14|Signode Industrial Group, LLC|Debris sweep and dry assist device for strap printing|
    BE1023141B1|2015-07-08|2016-11-29|Cnh Industrial Belgium Nv|BUTTON-LAYER SYSTEM FOR AGRICULTURAL BALL PRESS|
    US10588265B2|2016-10-31|2020-03-17|Deere & Company|Individual needle protection system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB0712921A|GB2450716A|2007-07-04|2007-07-04|Improvements in square balers|
    GB0712921|2007-07-04|
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