機械外文翻譯.doc

1Bale twine knotter with adjustable wiperBackground of the inventionThis invention relates to twine knotters for hay or straw baling machines and more particularly to an improved wiper arm for such knotters.In one conventional baler, the twine knotter includes a rotatably mounted billhook for forming a loop of twine thereabout. On one side of the billhook is a wiper arm which has a pair of finers defining a fork for receiving and guiding twine used to tie a bale. On one side of the billhook is a knife riveted to the fork for cutting the twine after a loop in the twine has been formed around the billhook. A wiper is formed integrally with the fork of the arm and strips or wipers the loop of twine form around the billhook as the severed end of the twine is held in the billhook jaw. Proper adjustment of the wiper arm relative to the billhook is critical to the operation of the nkotter as the wiper must strip or wipe the twine loop from the billhook to complete the formation of the knot. Wiper arm adjustment is performed initially at the point of manufacture and periodically thereafter when servicing the baler. It is accomplished by modeling or bending the arm in three areas with a special tool. By modeling, the wiper is centered with respect to the heel of the billhook and adjusted so theat it just clears the billhook jaw. For this reason, it is desirable that the wiper arm be relatively rigid and unyielding so that proper adjustment can be maintained and yet be sufficiently bendable to permit initial adjustmen. Also, in recent years , stronger twines are being used on such balers to tie bales of higher density. Such changes subject the wiper arm to higher forces during operation thus making it more difficult to maintain the arm in proper adjustmen, while at the same time, making the arm flexible enough to permit initial adjustment. Accordingly, it is an object of this invention to provide a knotter with an improved wiper arm having a strong and rigid construction to maintain an accurate adjustmen.Another object of this invention is to provide a knotter with a wiper arm which has a wiper which is easily and accurately adjustable with respect to the billhook of the knotter.SUMMARY OF THE INVENTION These and other objects of the invention are accomplished by knotter comprising a rotatably mounted billhook for forming a loop of twine thereabout and a wiper arm with an improved adjustably mounted wiper for sliding a twine loop form the billhook while the twine end is retained in a jaw of the billhook to complete the formation of a weine knot. In one embodiment, the wiper has slots formed teerein and is adjustably mounted on the arm and relative to the billhook by screws inserted through the slots and thereadably mounted in the arm. In a second embodiment, the wiper has first and second portions joined together at a right angle and is asjustably mounted relative to the arm and to the billhook of the knotter by the insertion and removal of shims between the second portion of the wiper and the arm.2Brief description of the drawings FIG. 1 is a fragmentary perpective view of a twine knotter in accordance with a preferred embodiment of this invention. FIG. 2 is an esploded view of a wiper arm of the kontter shown in FIG.1FIG. 3 is a view of the knotter of FIG.1 taken along line 33.FIG. 4 is a fragmentary perspective view of a knotter wiper arm in accordance with a second embodiment of this invention.FIG. 5-9 are fragmentary perspective views pf a knotter of FIG.1 showing progressive stages of knot tying.Description of the preferred embodimentsFIGS.13 show in fragmentary form a knotter 1 in accordance with the preferrde embodiment of this invention. Knotters of this general type are well knowen in the art and are widely used commercially, such as in the John Deere 466 Series balers sole by John Deere Company, a corporation of Delaware. Such balers are used for the baling of hay or straw into a rectangular parallelpiped shaped bale.Knotter 1 comprises a billhook 13 including (1) a center shaft 3on which billhook 13 is rotatably mounted in a knotter frame 5 and (2) a jaw 14 around which a loop of twine is formed as rotated and for retaining the twine end during knot formation. On one said of billhook 13 a twine disk 15 and a twine holder 16 are provided for holding a segment of twine 19. On the opposite side and below billhook 13, a wiper arm 17 is provided.Wiper arm 17 (FIGS.1,2) includes a twine guiding fork 20 preferably of cast iron,a knife blade 24 bolted to fork 20 cutting the twine and a wiper 21 for removing a loop of twine 19 from billhook 13.Fork 20 consists of a pair of fingers 22,23 between which twine 19 is received and guided and a vertex 25 at which fingers 22,23 are joined. One side of certex 25 has a boss 25 with a pair of threaded apertures 29,31 and th which wiper 21 is adjustably mounted. Fork 20 may be formed either by casting or forging and therefore is a strong, rigid component.Wiper 21, preferably of case hardened steel, is platelike and has a pair of slots 33, 35 corresponding in spacing to the threaded apertures 29,31 of boss 25. The profile of wiper 21 is conventional and has an arcuate recess or ledge 37. Wiper 21 is detachably mounted to fork 20 by a pair of screws 39,41 which pass through slots 33,35 and threadably engage apertues 29,31 so that fork 20 and wiper 21 are held tightly toghter. Wiper 21 is asjustable relative to fork 20 by moving wiper 21 back and forth in a plane parallel to the major planes of wiper 21 and in a direction parallel to the direction of elongation of slots 33,35 when screws 39,41 are loosened.Referring now to FIG. 3, wiper 21 is positioned closely to billhook 13 which ledge or recess 37 centered in relation to an outer surface or heel 43 of jaw 14. The maximum recommended clearance between a first portion 43 of jaw 14 and ledge 37 is 2.4.mm. at the closest distance which jaw portion 45 approaches during rotation of billhook 13 during the formation of a twine knot.In contrast to the conventional integral wiper arm described in the Background of the Invention which requires modeling or bending of the wiper arm at positions corresponding to positions A,B and C shown in FIG. 2 in order to adjust the wiper with respect to the billhook for proper stripping of a twine loop from the billhook, the present embodiment of the invention achieves alignment simply and easily by adjustment of wiper 21 by loosening of screws 39,41 and sliding platelike wiper 21 back and forth. This permits fork 20 and wiper 21 to be deformable in use.In accordance with the features of a second embodiment of this invention, FIG. 4 shows a vertex 51 of a wiper arm 53 identical to wiper arm 17 except for the portion shown and descrobed in FIG. 4. shows a vertex 51 of a wiper arm 53 identical to wiper arm 17 except for the portion shown and described in FIG. 4. Wper arm 53 portion shown and described in FIG. 4. Wper arm 53includes a wiper 55 having first and second portions 57, 59 joined together at a right angle.Wiper 55 is adjustably mounted to a major surface 61 of vertex 51 by an attachment means 63,here shown as a pair of bolts(only one of whichbolt 65is visble in FIG.4)inserted through aperture 67, 69 in wiper 55 and vertex 51, respectively. Adjustment pof the height of a ledge 71 of wiper 55 above surface 61 is accomplished by the insertion and removal of shim means 73 inserted on bolt 65 between surface 61 and second portion 59 of wiper 55. Shim means 73 is here shown as a plurality of washers.The functionng of knotter 1 for tying twine around a bale of hay is conventional and will be described herein only briefly. Particular reference is made to FIG.1 and FIGS.59 which show the progressive stages of knot formation.FIG.1 shows the condition when a needle 75 (showm in FIG.5) is threaded with twine 10 stored in a twine box (not shown) and from a prior cycle, one end of twine 19 is held in twine disk 15 by twine holder 16. Twine 19 is threaded through fork 20 between fingers 22,23 and ocer the top of bale 77. As bale 77 is formed and moves against twine 19,twine 19 is extended across the outer surface of bale 77 by pulling more twine from the twine box. As shown in FIG.5,when bale 77 reaches a predetermined length, a measuring wheel(not shown) activates kontter 1; and needle 75(with the help of a tucker finger, not shown) brings a second steand of twine 19 from below and around the trailing end of bale 77, through fork 20, across billhook 13 and into twine disk 15. In FIG.6, disk 15 is then turned (counterclockwise) sufficiently to permit twine holder 16 to secure both strands of twine 19 n disk 15 and billhook 13 starts to revolve. The turning of billhook 13(FIG.7) causes a loop 78 of twine 19 to be formde around the exteriof surface of billhook 13, and jaw 14 is opened to receive twine 19. wiper arm 17(FIG.7) is moved, thereby advancing knife 24 against twine 19 to cue twine 19 helld in disk 15 for the formation of the next knot in the next knotter cycle. Jaw 14 (FIG.8) is closed and holds the ends of twine 19 tighely. Further movement of wiper arm 17 causes wiper 21 to push or wipe the twine loop 78 from billhook 13 as jaw 14 holds the two cut1手臂可調式捆包打結器發(fā)明背景這項捆繩打結器的發(fā)明和割草機有關，更特別的是為打結機器改良了手臂裝置。傳統(tǒng)的打包機、捆繩打結器包括一個可旋轉地已安裝好的鉤鐮，用來形成一個纏繞線圈。鉤鐮的一邊是一個手柄臂，這個手柄臂有一對靈敏的叉子用來接放繩子捆包。在鉤鐮的另一邊是一個和叉子固定在一起的執(zhí)長刀，用來剪斷捆綁后在鉤鐮里面的線圈。一個手臂完整的形成是叉子臂和手臂線圈在鉤鐮外形成纏繞，最終放置在鉤鐮鉗口里。適當調整和鉤鐮相關的手柄臂來實現打包，手柄臂必須從鉤鐮里退掉打包線圈來完成一個打包循環(huán)。手柄臂的調節(jié)主要表現在最初的加工制造和打包后周期性的定時維修。它的完成是通過建?；蛘哂靡环N特殊的工具進行三個區(qū)域的手臂彎曲。通過建模，手柄臂被置于鉤鐮的跟部的中心，調整后就會出現清晰的鉤鐮鉗口。正式因為這個原因，手柄臂被定為相對嚴格不能彎曲為了可以適當的調整并且保持，然而適當的彎曲在可調節(jié)范圍內是允許的。在近幾年來，更粗的打包繩子應用于這種打包機來捆綁高強度的大包。這種改變以手柄臂在運行過程中提供更高的強度為條件的，因此適當調節(jié)來保持手柄臂就變得更難了，然而，使手柄臂的撓性更高就可以完成主要的調節(jié)。照此，這項發(fā)明的目標就是提供一種打包機能夠提高手柄臂的強度并且可以保持手柄臂調節(jié)的精確度。這項發(fā)明的另一個目標是提供一個容易并且精確調節(jié)的手柄臂給打結機?？偨Y的發(fā)明這些和其他物體的發(fā)明是由knotter包括安裝執(zhí)長刀(rotatably形成回路及雨刮器臂纏繞在其附近adjustably刮了滑動一個麻繩安裝時形成的執(zhí)長刀(回路中保留最終麻繩下顎執(zhí)長刀(形成一套完整的weine打結。在一個化身,鋁槽,形成具有teerein adjustably安裝到機架和相對的執(zhí)長刀(用螺絲插入通過槽和thereadably安裝的手臂。在第二個表現、刮雨器第一和第二部分有一起參加直角,asjustably安裝相對的手臂和對執(zhí)長刀(由插入的knotter之間的shims第二部分雨刮器、手臂。想的手臂較嚴格的刮不屈以便適當調整,還能維持足夠bendable允許初始adjustmen。同樣,最近幾年,強大的纏繞正被用于等5個系包密度高。這種變化的手臂,更高的力量在刮操作從而使它更難以保持手臂在適當的adjustmen,同時,使手臂足夠的靈活性,允許初始的調整。對發(fā)明的總結這項發(fā)明是通過打結器包括已放置好的執(zhí)長刀和用來形成打包線圈的鉤鐮來完成的，一個手柄臂有一個改良后可調節(jié)的手柄，用來滑行在鉤鐮里形成線圈，當線圈末端停留在鉤鐮鉗口里時就完成了一個打包循環(huán)。具體的一點是，手柄跟蹤形成纏繞，已放置的一個手柄臂的調節(jié)和鉤鐮是相關的通過在槽內放置螺絲釘和在手柄里形成纏繞。具體額第二點是，手柄有主次兩部分在一個正確的角度內結合在一起，這種調節(jié)相對于手柄和鉤鐮是通過嵌入和移動兩部分手柄和手臂之間的薄墊片來實現的。2簡潔的圖形描述圖1是一種部分圖和打包機的具體發(fā)明圖是一致的圖2是一個短臂角度的打包機圖片圖1已經給出圖3是一個圖1的到3-3線打包機圖。圖4是打包機的部分圖和具體第一點相一致。圖5 9是打包機的部分圖顯示了圖1打結機漸進式階段的打結過程。具體表現的描述圖1-3顯示了打包機一部