Swath Lifter

Abstract

A swath lifter includes a rotor over which the crop is carried with the rotor driven in a direction so that an underside of the rotor adjacent the ground is driven opposite to the direction of movement. The rotor carries rows of tines at angularly spaced positions around the rotor each associated with a flexible strip of a resilient material located in front of the tines and covering an inner part of the tines with the outer part exposed. The rotor can be arranged with its axis inclined to a line at right angles to the forward direction thus tending to carry the crop to one side to direct the cop onto an adjustable swath guide board to cooperate to form the swath into a desired condition. The rotor can be used as a front member in a pickup for example for a baler.

Claims

1-32. (canceled)

33. Apparatus for lifting a swath comprising: a wheeled frame for movement over ground carrying a swath of harvested crop material; a support rotor mounted on the frame for rotation around a longitudinal axis of the support rotor with the axis of the rotor arranged generally transversely across the swath; a drive arrangement driving the support rotor in rotation in a direction so that an underside of the rotor adjacent the ground is driven opposite to the direction of movement of the ground relative to the support rotor as the support rotor moves forwardly; a plurality of rows of tines mounted on the support rotor for rotation therewith, each row extending longitudinally of the support rotor with the rows arranged at angularly spaced positions around the support rotor with the tines extending generally outwardly from the rotor; wherein each tine row is carried on an elongate support member mounted on the support rotor parallel to the longitudinal axis of the support rotor; wherein each elongate support member is rotatable about an axis longitudinal of the member so as to adjust an angle of the tines on the elongate support member relative to a radius of the longitudinal axis of the support rotor; and wherein the support rotor is arranged so that the lifted crop material in the swath is carried over a top of the support rotor.

34. The apparatus according to claim 33 wherein there is provided a plurality of flexible strips of a resilient material and wherein each flexible strip extends from the support rotor to an outer edge of the flexible strip spaced from the support rotor and spaced inward of an outer end of the tines so that an outer portion of each tine is exposed beyond the outer edge of the flexible strip and so that an inner portion of the tine is covered by the flexible strip.

35. The apparatus according to claim 34 wherein the flexible strip has an inner edge attached to the rotor.

36. The apparatus according to claim 33 wherein the tines are double spring tines.

37. The apparatus according to claim 33 wherein an angle of the axis of the rotor relative to a line at right angles to the direction of forward movement is adjustable.

38. The apparatus according to claim 33 wherein the frame includes a transverse main frame member carried on ground wheels adjacent respective ends thereof with a hitch member connected to the main frame member at location between the ends thereon and extending from the main frame member to a forward end for attachment to a tractor; wherein an angle of the hitch relative to the main frame member can be adjusted about a generally upright axis; wherein the wheels are steerable relative to the main frame member so that the angle of the main frame member to a line at right angles to the forward direction is changed; and wherein, as the wheel angle is adjusted, the hitch angle also needs adjustment to maintain the center position of the rotor relative to the windrow center line position so that a preferred position of operation allows the rotor to be centered over the windrow and be equidistant whilst not driving over an adjacent windrow with tractor tires.

39. The apparatus according to claim 33 wherein the rotor is mounted on respective float arms extending rearwardly from the main frame member and supported by float spring members to allow up and down floating action of the rotor relative to the main frame member.

40. The apparatus according to claim 39 wherein a height of the rotor relative to the ground wheels can be adjusted to change a height of the rotor relative to the ground.

41. The apparatus according to claim 33 wherein there is provided a cover over the rotor.

42. The apparatus according to claim 33 wherein the rotor is arranged at an angle that is not perpendicular to the direction of travel so that the swath is carried over the top of the rotor and moved to one side and there is provided a swath guide board arranged so that the swath when moved to one side is thrown against the guide board that guides the behavior of the swath as it drops to the ground.

43. Apparatus for lifting a swath comprising: a wheeled frame for movement over ground carrying a swath of harvested crop material; a support rotor mounted on the frame for rotation around a longitudinal axis of the support rotor with the axis of the rotor arranged generally transversely across the swath; a drive arrangement driving the support rotor in rotation in a direction so that an underside of the rotor adjacent the ground is driven opposite to the direction of movement of the ground relative to the drum as the rotor moves forwardly; a plurality of rows of tines mounted on the rotor for rotation therewith, each row extending longitudinally of the rotor with the rows arranged at angularly spaced positions around the rotor with the tines extending generally outwardly from the rotor; wherein the frame includes a transverse main frame member carried on ground wheels adjacent respective ends thereof with a hitch member connected to the main frame member at location between the ends thereon and extending from the main frame member to a forward end for attachment to a tractor; wherein an angle of the hitch relative to the main frame member can be adjusted about a generally upright axis. wherein the wheels are steerable relative to the main frame member so that the angle of the main frame member to a line at right angles to the forward direction is changed. wherein, as the wheel angle is adjusted, the hitch angle also needs adjustment to maintain the center position of the rotor relative to the windrow center line position so that a preferred position of operation allows the rotor to be centered over the windrow and be equidistant whilst not driving over an adjacent windrow with tractor tires.

44. The apparatus according to claim 43 wherein there is provided a guide board for receiving the crop material from the support rotor wherein the angle of the rotor and the angle of the guide board are arranged so that the swath is compressed rather than spread out.

45. The apparatus according to claim 44 wherein the angle of the rotor and the angle of the guide board are arranged to induce some twisting motion into the swath that brings material from the edge or bottom of the swath to the top or a different position.

46. The apparatus according to claim 44 wherein the rotor angle and the guide board position are adjustable.

47. The apparatus according to claim 43 wherein the support rotor is mounted on respective float arms extending rearwardly from the main frame member and supported by float spring members to allow up and down floating action of the support rotor relative to the main frame member.

48. The apparatus according to claim 47 wherein a height of the support rotor relative to the ground wheels can be adjusted to change a height of the support rotor relative to the ground.

49. The apparatus according to claim 43 wherein there is provided a cover over the rotor.

50. Apparatus comprising: a farm implement for collecting crop from a swath of harvested crop material; an apparatus for lifting the swath comprising: a wheeled frame for movement over ground carrying the swath; a support rotor mounted on the frame for rotation around a longitudinal axis of the support rotor with the axis of the support rotor arranged generally transversely across the swath; a drive arrangement driving the support rotor in rotation in a direction so that an underside of the support rotor adjacent the ground is driven opposite to the direction of movement of the ground relative to the support rotor as the support rotor moves forwardly; a plurality of rows of tines mounted on the support rotor for rotation therewith, each row extending longitudinally of the support rotor with the rows arranged at angularly spaced positions around the support rotor with the tines extending generally outwardly from the support rotor; wherein the rotor is arranged at an angle that is not perpendicular to the direction of travel so that the swath is carried over the top of the support rotor and moved to one side; where the rotor is mounted in front of the farm implement and it moves along the swath to convey the swath toward said implement.

51. The apparatus according to claim 50 wherein the rotor is carried on a separate machine from the implement.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0079] One embodiment of the invention will now be described in conjunction with the accompanying drawings in which:

[0080] FIG. 1 is a top plan view of an apparatus according to the present invention.

[0081] FIG. 2 is a view along the lines 2-2 of FIG. 1 showing the cross-section of the pick-up rotor.

[0082] FIG. 3 is a view along the lines 3-3 of FIG. 1 showing a top plan view of one portion of the pick-up rotor sowing the mounting of the pipe and the tines thereon.

[0083] FIG. 4 is an isometric view of a second embodiment of apparatus according to the present invention showing the same rotor arrangement but carried on an alternative frame arrangement where the frame has steerable end wheels and a steerable center hitch, the arrangement being shown with the cover and swath guide boards removed.

[0084] FIG. 5 is an isometric view of the second embodiment of FIG. 4 showing the covers and swath guide boards in place.

[0085] FIG. 6 is a schematic side elevational view of the second embodiment of FIG. 4 showing floating mounting of the cover and rotor on the frame.

[0086] FIG. 7 is a top plan view of the second embodiment of FIG. 4 showing the wheels and hitch in a turned position allowing a line at right angles to the axis of the rotor to run at an angle to the forward direction of the machine.

[0087] FIG. 8 is a plan view of the second embodiment of FIG. 4 showing the hitch and wheel steering arrangement.

[0088] FIG. 9 is a circuit diagram of the second embodiment of FIG. 4 showing control from the cab of the hitch angle cylinder, the rotor lift cylinders and the wheel steering cylinder.

[0089] FIG. 10 is a top plan view of the second embodiment of FIG. 4 showing the swath guide boards in place with the rotor at an angle to the forward direction so as to carry the swath sideways into engagement with one of the guide boards so that the sideways movement controlled by the rotor and the pressure on the swath by the guide board act to form the swath into a required construction.

[0090] FIG. 11 is a plan view of a fourth embodiment of apparatus according to the present invention showing the same rotor arrangement but carried on a farm implement as a lead component of a pickup for the implement.

[0091] FIG. 12 is a plan view of a seventh embodiment of apparatus according to the present invention showing the same rotor arrangement but carried on a self propelled implement to pickup and lift a swath but not perform any harvesting functions.

[0092] In the drawings like characters of reference indicate corresponding parts in the different figures.

DETAILED DESCRIPTION

[0093] The apparatus for lifting a swath for aeration includes a wheeled frame 10 including a hitch 11 pulling a subframe 12 mounted on ground wheels 13. The subframe carries a rotor frame 14 for movement over the ground. The rotor frame carries a cylindrical drum 15 with an end flange 16 and a peripheral wall 17. The drum is mounted on side arms 19 and 20 which are connected by a front beam 22 which holds the side arms fixed and parallel with the drum spanned therebetween on bearings 24. The arm 20 is carried on an outer wheel 21 and the arm 19 is attached to the side of the frame 10 by a mounting 10A to be carried thereby. The rotor frame is thus supported and pulled by the subframe so as to extend outwardly therefrom so that a tractor pulling the subframe runs along one side of a swath S with the rotor frame extending across the swath with the beam 22 in front of the rotor and above the swath so that the swath passes under the beam and can be lifted by the rotor acting as a pick-up as the rotor moves forwardly across the ground.

[0094] The rotor is thus mounted on the frame 14 for rotation around a longitudinal axis A of the rotor or drum 15 arranged generally transversely across the swath. A drive arrangement 25 including a motor 26 and a drive chain 27 acts for driving the drum in rotation. The drive chain can engage the rotor drum itself or the shaft on which the drum is mounted. The motor is suitably mounted on the frame 14 and is typically hydraulic so as to be driven by the hydraulic fluid from the tractor or a power take off driven hydraulic pump. The drum is driven in a direction so that an underside of the rotor adjacent the ground is driven forwardly or opposite to the direction of movement of the ground relative to the drum as the rotor moves forwardly. The rotor speed is greater than 50 rpm and more preferably in the range between 60-100 rpm. This causes the rotor to actively move against the crop and lift the crop so that it passes over the rotor. If a faster ground speed is desirable, the rotor speed must increase relatively. Care must be taken to not reach excessive speeds or crop damage may occur.

[0095] The rotor or drum 15 carries a plurality of rows 30 of tines 31 mounted on the rotor 15 for rotation therewith. The tines are conventional pickup tines with a pair of tine fingers 32 and 33 connected by a helical spring 34 where a mid point of the spring is bolted at 35 onto the tine support pipe 36. Thus each row 31 of the tines is mounted extending longitudinally of the rotor 15 with the rows 31 arranged at angularly spaced positions around the rotor 15 with the tines extending generally outwardly from the rotor 15.

[0096] Each tine row is carried on the support 36 in the form of an elongate cylindrical pipe 37 mounted on the rotor parallel to the axis of the rotor. The pipe has an outer surface 38 around which the helical spring 34 is wrapped. Each elongate pipe 37 is rotatable about an axis longitudinal of the pipe so as to adjust an angle of the tines on the pipe relative to a radius of the rotor axis A1. The elongate pipes are mounted on the rotor using flanges 39 welded to the pipe at one end and bolted to a bracket 40 for each pipe using bolts 41 mounted on slots in the bracket that allow for easy tine angle adjustment. Simple circular mounting brackets 44 are mounted at spaced positions along the pipe to hold the pipe axis A1 parallel to the drum axis A.

[0097] The rotor further carries a plurality of flexible strips 45 of a resilient material with each strip being located in front of a respective one of the rows of tines relative to the direction of rotation. Each strip extends from an inner end 46 bolted onto the outer face of the rotor by bolts 47 to an outer edge 48 of the strip spaced from the rotor surface 38 and spaced inward of an outer end 50 of the tines 32, 33. In this way an outer portion 51 of the tine 32, 33 is exposed beyond the outer edge 48 of the strip 45 and so that an inner portion 52 of the tine is covered by the strip.

[0098] Each strip extends fully along the length of the row so as to cover a portion of each tine of the respective row.

[0099] In this way so that, as the rotor rotates forwardly relative to the ground, the strip is presented to the swath on the ground in advance of the tines. The tines and strip are arranged such that the outer end portions 51 of the tines pass close to the ground, within 1 to 2 inches as the rotor rotates so as to pick up the crop material from the swath at a position immediately at the ground. The strip covers the inner portion 51 of the tines. As shown in FIG. 2, this causes the tines and the cooperating strip to operate so that the strip 45 engages the crop material at the inner ends of the tines to avoid contact of the inner portion 52 of the tines 32, 33 with the crop material at the top portion S1 of the swath S. in this way, the rotor is arranged so that the lifted crop material in the swath is carried over the top of the rotor and dropped onto the ground behind the rotor.

[0100] The strip thus protects the swath from wrapping on the drum and the coil of the inner portion of the tines while the wet material in the portion S2 of the swath is vigorously engaged and lifted by the tines. The rotor is arranged so that the swath is carried over the top of the rotor without contact with confining elements which direct side edges of the crop inwardly. The rotor thus acts to drive the crop up over the rotor and spread and fluff the crop up and as well as widening the swath S from an initial width W to a wider width W1 behind the rotor.

[0101] The length of the tines is in the range 5 to 8 inches and a width of the strip from the rotor to the outer edge is in the range 4 to 6 inches so that an amount of the tines exposed beyond the outer edge is in the range 4 to 5.5 inches. This length has been found to provide an effective lifting action from the exposed tines while protecting the top part of the swath. These dimensions are of course crop dependent so that suitable tines and strips can be selected to meet the expected height of the swath in the field.

[0102] In FIG. 1, the mounting 10A is arranged so that the axis A of the rotor is at right angles to the direction D of forward movement. However the wheel 21 and the mounting 10A can be adjusted so that the axis A takes up a position A2 at an angle to a line A3 at right angles to the direction of forward movement, where the angle is in the range 10 to 30 degrees and preferable of the order of 20 degrees. In this way the tines move in planes at an angle to the forward direction so that there is a component of movement of the tines from their forwardmost engagement with the crop across the crop toward the end of the rotor at the frame 10. This transverse movement is known to provide an improved pick-up action in cases where the swath is sufficiently compacted to make the pick-up action difficult. This transverse movement can also permit the swath to relocate beside the original position.

[0103] Turning now to the second embodiment shown in FIGS. 4 to 10, the same rotor or drum 15 as described above is mounted on a simpler frame construction where the rotor 15 is mounted between two support wheels rather than cantilevered outwardly from a support frame as in FIG. 1. Thus the rotor 15 is carried in a housing 60 with end walls 61 and 62 mounting respective ends of the rotor 15. On top of and bridging the end walls is provided a cover 63 under which the rotor is mounted and the swath passes. The housing 60 is mounted at each side on a castoring gauge wheel 64 adjustable in height to control the height of the housing from the ground and thus the height of the rotor and tines from the ground. The tines can be arranged to contact the ground or to terminate a short distance of perhaps 2 inches from the ground.

[0104] The housing is carried at each side on a float construction 65 which allows the housing to float up and down relative to a mounting frame 70. The float construction 65 comprises two parallel links 66 and 67 connected to the frame at the front and to the housing at the rear and are supported by a float spring 68. The housing carried on the gauge wheels is thus drawn across the ground and can float relative to the frame 70 and can be lifted away from the ground on lift cylinders 71 which allow the housing and rotor to be lifted out of engagement with obstacles and for transport.

[0105] The frame 70 comprises a cross-beam 72 with depending legs 73 and 74 on which are mounted ground wheels 75 for steering movement about respective vertical steering axes at the end of the beam 72.

[0106] A center mounted hitch 76 extends from a bracket 77 on the beam 72 to a forward hitch coupling 79 for attachment to a tractor. The angle of the hitch relative to the beam 72 is adjusted about a vertical axis by a hydraulic cylinder 78.

[0107] The wheels 75 are steered by a linkage 80 operated by a hydraulic cylinder 81 (FIG. 8) which drives a shaft along the beam 72 to operate respective steering linkages 83 of the respective wheels 75. In this way as shown in FIG. 7, the wheels 75 can be turned to define a forward travel direction FD travelled by the frame and the tractor pulling the frame which is at an angle to the line RA at right angles to the axis A of the rotor. As set out above this angle can be adjusted by steering the wheels 75. At the same time the angle of the hitch 76 to the beam 72 can be adjusted to locate the position of the tractor relative to the mouth of the machine so that the tractor does not run over the swath before it enters the mouth.

[0108] In one convenient arrangement for operating the adjustment of the wheel angle and the hitch angle, a hydraulic control arrangement has two circuits, one for operating the cylinder 78 to change the hitch angle during passage across a field and a second circuit for controlling the lift cylinders 71 which also need to be actuated regularly during passage across the field. In order to change the wheel steering angle by operating the cylinder 81, the second circuit operating the lift cylinders is triggered at an end of the movement of the lift cylinders by a sequencing valve so that the second circuit then operates the movement of the cylinder 81 to change the steering angle. Alternatively, if the tractor has three hydraulic circuits the sequencing valve is not required.

[0109] Thus as shown in FIG. 10, the rotor is arranged at an angle that is not perpendicular to the direction of travel so that the swath is carried over the top of the rotor and moved to one side as indicated at 85 and there is provided a swath guide board 86 arranged so that the swath when moved to one side is thrown against the guide board 86 that guides the behavior of the swath as it drops to the ground.

[0110] The rotor is arranged so that the swath is carried over the top of the rotor which can then make contact with adjustable swath guide boards 86 or confining elements which deflect the crop material upwardly or downwardly or direct side edges of the crop inwardly or without direction depending on the level of adjustment of the confining elements or boards 86.

[0111] The rotor can be arranged at an angle that is not perpendicular to the direction of travel so that the swath is carried over the top of the rotor, with the angle then causing the swath to land in a position that is beside its original position, either rightward or leftward of for example between 1 and 4 feet of distance. The rotor operates to drive the crop up over the rotor and spread and fluff the crop up and as well as, in some cases, narrowing the swath. The rotor speed is adjustable by way of modulating the flow of hydraulic oil to the motor driving the rotor. The position of the swath guide board is adjustable by an electric powered actuator or hydraulic cylinder 87.

[0112] The rotor and its accompanying frame elements may be lifted relative to the ground by the hydraulic actuator 71 operable by the second circuit circuit controlled within the tractor operator station.

[0113] In the above cases the rotor is positioned at an angle other than perpendicular to the direction of travel. This can be a “left” or “right” angle and the angle can vary from 0 to 45 degrees. The more the angle, the more aggressive the outcome but the user can adjust this to suit the field conditions or specific application. In this way the windrow material is thrown by the rotor against a deflector plate or curved sheet 86 that manipulates the windrows behavior as it drops to the ground.

[0114] The more aggressive the angle combined with an adjusted position of the deflector sheet 86 will compress the windrow inwardly rather than spread it out. It also can simultaneously induce some twisting motion that brings material from the edge or bottom of the windrow to the top or a different position. This introduces some gentle mixing which aids in drying.

[0115] If the rotor angle is zero so that the rotor operates perpendicular to direction of travel, a second deflector plate can be adjusted to push the windrow in a manner which causes it to widen. This adjustable feature can also be combined with an adjustment to rotational speed to affect the behavior and physical nature of the windrow as it travels over the rotor 15 and deflects off the plate 86. A higher rotational speed induces greater velocity and airflow to the windrow material, affecting its behavior as it is deflected or not.

[0116] The same deflector plate 86 and speed can be adjusted when the rotor angle is not zero and these adjustments can be made in combination with the sheet deflector adjustments and therefore more fine tuning of the manipulation of the windrow is possible.

[0117] Another feature provides that the entire rotor assembly and housing 60 lift by way of hydraulic cylinders 71 and be suspended on the frame. This allows the rotor to avoid contact with windrows if so desired when turning in the field or for transport. It also allows the operator to avoid obstacles such as rocks.

[0118] The rotor, including the rotor pipe with radial pipes and tines along with belting strip, can be used in other situations rather than just in the swath lifter machine.

[0119] For example, as shown in FIG. 11, the rotor 15 can be used on a crop harvesting machine such as balers such as round or square baler 88 where the rotor 15 replaces what is commonly referred to as a pickup. The rotor 15 can pickup a windrow and feed the hay or straw into the baler in the same way as a conventional pickup can perform using a feed belt 89.

[0120] In a combine harvester, the rotor can be installed to replace a conventional belt pickup. It is not typically used in combination with the conventional pickup but instead replaces it. In this application the benefits and advantages are the same as the baler.

[0121] In a vegetable, bean, vine or other plant material harvester, the rotor can be installed on a self-propelled or pull-type apparatus to rip and gather plant materials and convey them into storage, as shown in FIG. 12.

[0122] Since various modifications can be made in the invention as herein above described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without department from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.