Abstract:
A pickup for an agricultural implement, the pickup including dual floating windguards that pivot and float causing the tines to maintain contact with the crop at all times as it moves over the pickup and across the stuffer.

Description:
BACKGROUND OF THE INVENTION 
   The present invention relates generally to hay balers, and more particularly to an improved windguard system for the crop pickup and feeder assembly of a round baler. 
   For many years agricultural balers have been used to consolidate and package crop material so as to facilitate the storage and handling of the crop material for later use. Usually, a mower-conditioner cuts and conditions the crop material for windrow drying in the sun. When the cut crop material is properly dried, a baler, most likely a round baler, is pulled along the windrows to pick up the crop material and form it into cylindrically-shaped round bales. More specifically, the pickup of the baler gathers the cut and windrowed crop material from the ground then conveys the cut crop material with a conveyor, such as a rotating conveying rotor, into a bale-forming chamber within the baler. The pickup assembly has a drive mechanism that operates to activate both the pickup and the conveying rotor, and the pickup drive mechanism is operably connected to and driven by the main drive mechanism of the baler. The baling chamber consists of a pair of opposing sidewalls with a series of belts that rotate and compress the crop material into a cylindrical shape. When the bale has achieved a desired size and density, the operator wraps the bale to ensure that the bale maintains its shape and density. The operator raises the tailgate of the baler and ejects the bale onto the ground. The tailgate is then dosed and the cycle repeated as necessary and desired to manage the field of cut crop material. 
   The rotor conveyor mechanism (“rotor” or “rotor mechanism”) between the pickup and the bale-forming chamber is, itself, known in the prior art, as shown, for example, in U.S. Pat. Nos. 5,595,055 and 6,644,006. The rotor mechanism is usually referred to as the “stuffer”, because it stuffs the crop material into the gap between the floor roll and the starter roll into the bale-forming chamber. 
   It has been customary to provide the pickup mechanism with a lower windguard which pivots and floats to hold down the hay or other crop material as it is being fed rearwardly to prevent the crop material from being blown off the pickup floor and to ensure an adequate compaction of the crop material for good feeding into the stuffer mechanism. Additionally, a separate windguard is sometimes included above the stuffer assembly; however, this windguard pivots only, without floating. The pivot point of known upper windguards is positioned well above the stuffer assembly to allow large slugs of crop to pass underneath. With this high pivot position, the windguard often fails to keep the crop compressed when under normal crop flow. When the crop is not compressed as it enters the bale-forming chamber, difficulties in starting a bale can occur. 
   Conventional windguards are fairly simple structures, and include an elongated pipe-like member, often referred to as a windguard pipe, extending across the front of the pickup mechanism with a plurality of tines attached to the windguard pipe along its length extending rearwardly over the pickup mechanism. This type of windguard may be manually adjusted for different sizes of windrows of crop material by positioning the windguard pipe and the tines closer to the pickup mechanism for small windrows or farther away from the pickup mechanism for large windrows. If the windguard is adjusted for small windrows and a large windrow is encountered, the windguard pipe and tines may be too close to the pickup mechanism to accommodate the large windrow. This could cause plugging of the pickup mechanism. If the windguard is adjusted for large windrows and a small windrow is encountered, the windguard tines may be too far away from the pickup mechanism to protect the small windrow. This could result in wind loss of crop material, or, as mentioned above, difficulties in starting the bale core. 
   It would improve the operation of agricultural crop pickups if the problems identified above could be overcome. 
   SUMMARY OF THE INVENTION 
   Accordingly, it is an object of the present invention is to provide an improved windguard system for round balers; 
   It is another object of the instant invention to provide a windguard that provides increased versatility to a round baler; 
   It is another object of the instant invention to provide an agricultural implement pickup with upper and lower windguards, both of which rotate and float; 
   It is another object of this invention to provide and effective and efficient assembly to move crop material through and agricultural pickup and stuffer; 
   These and other objects are attained by providing dual floating windguards that pivot and float causing the tines to maintain contact with the crop at all times as it moves over the pickup and across the stuffer assembly. 

   
     DESCRIPTION OF THE DRAWINGS 
     The advantages of this invention will be apparent upon consideration of the following detailed disclosure of the invention, especially when taken in conjunction with the accompanying drawings wherein: 
       FIG. 1  is a representation of a partial side sectional view of a round baler pickup, stuffer and bale-forming chamber showing a windguard in place for normal operation; 
       FIG. 2  is a partial front perspective view of a basic round baler pickup with a combined upper and lower windguard; 
       FIG. 3  is a partial perspective view of a tine windguard extension; 
       FIG. 4  is a partial perspective view of a plate-type windguard extension; 
       FIG. 5  is partial perspective view of a basic low cost plate windguard; 
       FIG. 6  is a partial perspective view of a plate windguard extension; and 
       FIG. 7  is a partial perspective view of a roller windguard extension. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Many of the fastening, connection, processes and other means and components utilized in this invention are widely known and used in the field of the invention described, and their exact nature or type is not necessary for an understanding and use of the invention by a person skilled in the art, and they will not therefore be discussed in significant detail. Also, any reference herein to the terms “left” or “right” are used as a matter of mere convenience, and are determined by standing at the rear of the machine facing in its normal direction of travel. Furthermore, the various components shown or described herein for any specific application of this invention can be varied or altered as anticipated by this invention and the practice of a specific application of any element may already by widely known or used in the art by persons skilled in the art and each will likewise not therefore be discussed in significant detail. 
   Round balers are well known in the agricultural industry, and the instant invention can be used with substantially any of such machines. Reference is made, for example, to U.S. Pat. Nos. 6,688,092 and 6,295,797 that illustrate two such balers. 
     FIG. 1  depicts an agricultural round baler, generally designated  10 , as it would be pulled from right to left along a windrow of cut crop material by a tractor (not shown). Baler  10  is comprised of a wheel-supported bale-forming mechanism with a crop pickup  12  for moving the crop material from the field along and past the stuffer assembly  14  in the direction of arrow  16 . The stuffer assembly pushes the crop material into the gap between the floor roll  18  and the starter roll  20  and thence into the bale-forming chamber  22 . Pickup  12  is usually wider than the bale-forming chamber of the baler  10  and includes its own frame mounted to the main frame of the baler for pivoting about a horizontal transverse axis. 
   As alluded to previously, the crop in the field is usually arranged in a windrow as it is engaged by the pickup  12 . Depending upon the condition of the crop, i.e., the volume and length of crop, the flow of the crop material through the pickup and stuffer can range from fairly constant to irregular, and may contain frequent or infrequent slugs-a larger than normal volume of material. The issue addressed herein relates to the understanding that the core of a bale, and the starting of a new bale, is improved if the crop being fed into the gap between the floor roll and the starter roll is compressed rather than fluffed or feathery and when the crop is efficiently and effectively moved through the pickup and stuffer. 
   The prior art, as exhibited for instance in the &#39;092 patent identified above, recognizes that a windguard properly located above the pickup can promote a more continuous and even flow of crop material. The instant invention is to a significant improvement to the windguard concept. Some current round balers with stuffers use two windguards, one upper and one lower, to keep the crop compressed while being fed the pickup and stuffer into the bale-forming chamber. The lower windguard is situated above the pickup and is capable of floating and pivoting. The upper windguard is positioned above the stuffer assembly and pivots without floating. This upper windguard is positioned with the pivot well above the stuffer assembly to allow large slugs of crop material to pass underneath. With this high pivot position, the windguard fails to keep the crop material compressed when under normal crop flow. As indicated, when the crop is not compressed when entering the bale chamber, difficulties in starting a bale core can occur. 
   Still referring to  FIG. 1 , one embodiment of the invention is shown to include a pair of windguards  24  and  30  that provide the necessary crop compaction prior to being fed into the bale-forming chamber. The lower windguard  24  includes a float arm  25  rotatable about fixed pin  26 . The forward end of float arm  25  is rotatably affixed to a transverse cross member  28  that extends across the width of the pickup  12 . Transverse cross member  28  is populated with a plurality of spaced-apart tines  36 . The float arm  24  is positioned such that the tines  36  may be shaped as shown, extending forwardly of an above pickup  12  and extending rearwardly toward stuffer  14 . With a similar structural arrangement on the opposite side of the pickup, the transverse member  28  and the tines  36  are adequately supported and the rotation about pin  26  and the connection between arm  25  and transverse member  28  allow the tines  36  to float with the volume of crop moving through pickup  12  and to maintain an appropriate amount of compaction thereof. Upper windguard  30  Is supported by a structure quite similar to that just defined for the lower windguard. Float arm  32  rotates about pin  31  and transverse member  28 , similar to  28 , supports a plurality of spaced-apart tines  34  across the pickup  12 . Tines  34  extend rearwardly from the forward end of float arm  32  toward the transverse gap between floor roll  18  and starter roll  20 . Thus, both the upper and lower windguards both float and pivot (or rotate), providing the desires contact with and compaction of crop material. 
   The weight of each windguard is enough to maintain the crop in a compressed state while entering the bale-forming chamber. In operation, the crop is engaged by the pickup  12  and pushed toward the stuffer assembly  14 . The lower windguard  24 , if for instance a slug is fed, pivots upwardly about axis formed by pin  26  and floats about the axis of transverse member  28 . As the slug moves rearwardly through the stuffer assembly  14  the slug causes the upper windguard  30  to pivot upwardly about pin  31 . During this entire operation, the windguards are in contact with the crop material, or slug, and maintains it in a compressed condition to be fed into the bale-forming chamber. The maximum downward movement of transverse member  28  may be limited by a chain or other similar flexible connector between member  28  and another part of the pickup or baler structure. 
   It is well known that as crop conditions vary the performance of agricultural implements also varies. The variations in performance can be explained by the difficulties in designing a pickup assembly that consistently feeds the crop material no matter what the length or volume of crop material being handled. In a round baler crop conditions are encountered that run the full range of possibilities; however, there are modifications, such as structural alternatives (or the modularity of being able to choose different alternatives) to the pickup that can be made to more effectively handle the variations. Other embodiments of the instant invention directly address this issue. 
     FIG. 2  shows a basic low cost windguard on a round baler pickup assembly, generally depicted as  50 . Pickup assembly  12  includes a wheel-supported framed having generally vertical side members, or sheets  52  and  54  with a pickup reel  56  supported therebetween. Two support arms  58 ,  60  are rotatably affixed to respective side members  52 ,  54  and at the other end to transverse member  62 . Transverse member  62  is a pipe-like element with a plurality of tines  64  affixed thereto in a spaced-apart relationship. The length of support arms  58 ,  60  are such that transverse member  62  is generally above the pickup reel  56 . The transverse member  62  is rotatably mounted to the end of the respective support arms  58 ,  60  and rotatably pinned at the other end to respective end members  52 ,  54 . This arrangement allows both flotation and rotation of the windguard. This configuration is a general compromise regarding the effectiveness with a range of crop conditions. As previously stated, pickup assemblies have a wide variety of configurations. The pickup assembly depicted in  FIG. 2  employs consolidating augers on the outer ends of the transition between the pickup reel  56  and the stuffer  66 . The augers further consolidate the crop material to insure an effective and efficient bale formation. 
     FIG. 3  shows a modification to the windguard shown in FIG.  2 . Two extension arms  70 ,  72  are rotatably affixed to the respective forward ends of support arms  58 ,  60 . The forward ends of extension arms  70 ,  72  rotatably support a second transverse member  74 . Similarly, the transverse member  74  has a plurality of fines  76  affixed thereto and extending rearwardly and below transverse member  62 . Both the primary and extension windguards both float and rotate because of the way in which the transverse members are supported, and provide a fairly consistent compression of the crop material as it feeds through the pickup. This configuration works best with large windrowed crops. 
   In  FIG. 4  there is depicted an alternative to the extension shown in FIG.  3 . Extension arms  70 ,  72  are supported and connected as the embodiment of  FIG. 3 ; however, instead of having tines, the extension is formed of a transverse plate  80 . Plate  80  may be formed with a cylinder or partial cylinder at the leading edge through which a pipe-like member may fit (and to which the plate is affixed) for support of the plate and pivotable attachment to the forward ends of extension arms as roller  120 ,  72 . Thus, similarly to the structure of  FIG. 3 , the basic and the extension windguards both float and rotate. Depending upon the width of the plate (front to back) a stop may be advantageous to prevent over rotation thereof. Again, a chain or similar device may be used to adjust the maximum downward movement of the extension windguard. This configuration is best suited for short light crops. 
   Another alternative embodiment would be to employ a roller windguard on the same extension structure as described above for the plate extension. The roller would have the configuration shown more particularly as roller  120  on the front of the machine of FIG.  7 . 
   The pickup assembly shown in  FIGS. 5-7  employs a rotor feeder rather than what was described above as a stuffer, though the type of feeder is not particularly significant to the instant invention.  FIG. 5  depicts a general windguard arrangement, suitable for many, but not all crop conditions. Two support arms  92 ,  94  are rotatably pinned adjacent the rearward ends thereof to side members  96 ,  98  and extend downwardly and forwardly to a location above and forward of pickup reel  100 . A transverse plate  102  is rigidly affixed to the forward ends of support arms  92 ,  94  and may have a few tines, such as  104  affixed thereto and directed generally rearwardly to assist in the transport and confinement of crop material. This particular configuration is also best used with heavy, long crops. 
     FIG. 6  depicts a structure similar to that of  FIG. 5 , but with two extension arms  110 ,  112  and the transverse plate  114 . Plate  114  is rigidly affixed to extension arms  110 ,  112 , but adjustably rotatable about the connection between extension arms  110 ,  112  and support arms  92 ,  94 . This adjustment is made manually by the operator. 
   The windguard arrangement shown in  FIG. 7  is similar to that of  FIG. 6 ; however, instead of a plate, a roller  120  is affixed to the extension arms  110 ,  112  for rotation as it engages the crop materials. The roller preferably has a hexagonal peripheral surface in cross-section, rather than round. This configuration is used to compress large windrowed crops for better feeding. 
   It will be understood that changes in the details, materials, steps and arrangements of parts which have been described and illustrated to explain the nature of the invention will occur to and may be made by those skilled in the art upon a reading of this disclosure within the principles and scope of the invention. The foregoing description illustrates the preferred embodiment of the invention; however, concepts, as based upon the description, may be employed in other embodiments without departing from the scope of the inventions. Accordingly, the following claims are intended to protect the invention broadly as well as in the specific form shown.