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WO1997044995A1 - Self-cleaning rotary trash harrow - Google Patents

Self-cleaning rotary trash harrow Download PDF

Info

Publication number
WO1997044995A1
WO1997044995A1 PCT/AU1997/000315 AU9700315W WO9744995A1 WO 1997044995 A1 WO1997044995 A1 WO 1997044995A1 AU 9700315 W AU9700315 W AU 9700315W WO 9744995 A1 WO9744995 A1 WO 9744995A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
axis
travel
angle
harrows
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU1997/000315
Other languages
French (fr)
Inventor
Gary John Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BROWN ROBYN
Original Assignee
BROWN ROBYN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BROWN ROBYN filed Critical BROWN ROBYN
Priority to CA002256541A priority Critical patent/CA2256541A1/en
Priority to AU27577/97A priority patent/AU2757797A/en
Priority to EP97921531A priority patent/EP0909123A1/en
Priority to NZ333466A priority patent/NZ333466A/en
Publication of WO1997044995A1 publication Critical patent/WO1997044995A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B21/00—Harrows with rotary non-driven tools
    • A01B21/02—Harrows with rotary non-driven tools with tooth-like tools
    • A01B21/04—Harrows with rotary non-driven tools with tooth-like tools on horizontally-arranged axles

Definitions

  • cultivating members for example spikes, spring teeth or discs arranged to be drawn over the ground to pulverise and smooth the soil.
  • cultivating members for example spikes, spring teeth or discs arranged to be drawn over the ground to pulverise and smooth the soil.
  • the cultivating members become clogged so that it is necessary to cease cultivation and clear away the trash.
  • the present invention accordingly provides harrows comprising a main beam, means for attaching the main beam to a prime mover to be drawn at right angles to the direction of travel at least one sub-frame fixed to the main beam and extending rearwardly of the main beam, each sub-frame supporting a spiked roller at an angle of between 50° and 55° to the direction of travel.
  • the preferred angle between each roller and the direction of travel is 53°.
  • the spikes on each roller are preferably located on a helical line around the surface of the roller, with the helices on all rollers running in the same direction.
  • the angle of such a helix to the axis of the roller is between 50° and 55°, preferably 53°.
  • each spike extends from the surface of the roller so that the angle between the axis of the spike and the axis of the roller is between 50° and 55°.
  • the most preferred angle between the axis of the spike and the axis of the roller is 53°
  • angles: between the roller and the direction of travel; and between the axis of the spike and the axis of the roller, are chosen such that the axes of the spikes are substantially parallel to the direction of travel when the spikes at the trailing edge of the roller pass through a horizontal plane.
  • Fig. 1 is a schematic plan view of one embodiment of the harrows
  • Fig. 2 is an elevation on a larger scale of a roller in the direction 2-2 of Fig. 1;
  • Fig. 3 is an elevation on the direction 3-3 of Fig. 1 showing the matter of mounting a roller on a sub-frame.
  • the harrows comprise a main beam 10 having a tow-bar 11 fixed thereto centrally at right angles. Struts 12 maintain the members 10 and 11 at right angles when subjected to the stresses encountered in use.
  • the height of the beam 10 above the ground can be adjusted in known manner by raising or lowering the ground wheels 13.
  • Each sub-frame further comprises a carrier beam 16 fixed to the rearward ends of the beams 14 and 15.
  • the sub-frames are mounted in known spring-loaded manner (not shown in the drawings) to provide "stump jump" ability.
  • the relative lengths of the beams 14 and 15 are such that the angle 17 between the beam 16 and the direction of travel is 53°.
  • Check plates 18 extend below the beams 16 at each end thereof.
  • a roller 19 is journalled in the check plates 18 to extend between them.
  • Spikes 20 are fixed to the outer surface of the roller 19 at locations lying on a helix.
  • the helices on all the rollers run in the same direction.
  • the angle of the helix to the axis of the roller is 53°.
  • Each spike protrudes from the roller such that its axis is at an angle of 53° to the axis of the roller.
  • the spacing of the sub-frames is such that the areas of ground traversed by the rollers 19 overlap to a small extent.
  • the rollers 19 rotate as a result of engaging with the ground. Trash caught up in the spikes is pushed laterally towards the outer edges of the area traversed.
  • the disposition of the rollers with respect to the direction of travel is reversed, by arranging the shorter beams 14 nearer to the central axis of the harrows than the beams 15.
  • the angles 17, of 53°, would then be located on the opposite sides of the beams 14 and 15.
  • a further embodiment of the invention having only one roller is useful in confined areas such as between the rows of trees in an orchard. (This embodiment is not illustrated in the drawings.)
  • This embodiment is based on a single sub-frame similar to each of the four sub-frames illustrated in Figure 1.
  • This embodiment of the harrows includes a short main beam having only two rigid beams (similar to beams 14 and 15 of Figure 1) fixed at right angles to the main beam.
  • a carrier beam similar to 16 is fixed to the rearward ends of these rigid beams.
  • Check plates similar to check plates 18 extend below this carrier beam.
  • a spiked roller similar to spiked roller 19 is journalled in these check plates to extend between them.
  • Yet further embodiments of the invention incorporate a relatively smaller roller disposed centrally of the other rollers of the harrow.
  • Such an embodiment of the invention could be similar to the embodiment of Figure 1, but differing from that figure in that there is a fifth roller disposed between the innermost two rollers, and straddling the central axis of the machine.
  • the longitudinal axis of such a roller may be at an angle either clockwise or anti-clockwise from the direction of travel.
  • Such a roller covers the gap in ground coverage between the inner edges of the two inner rollers, and can also be used for spreading chemicals.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Soil Working Implements (AREA)

Abstract

A self-cleaning rotary trash harrow comprising a main beam with for attachment to a prime mover to be drawn at right angles to the direction of travel at least one sub-frame fixed to the main beam and extending rearwardly therefrom the or each sub-frame supporting a spiked roller at an angle of between 50° and 55° to the direction of travel. The spikes are affixed at locations lying on a helix around the roller, and the angle of the helix to the axis of the roller is between 50° and 55°. Additionally the angle between the axis of each spike and axis of the roller is between 50° and 5°, to enable the axis of each spike to be parallel to the direction of travel when the spike passes through the horizontal plane at the trailing edge of the roller.

Description

CT/AU97 0315
SELF-CLEANING ROTARY TRASH HARROW
Known harrows have cultivating members, for example spikes, spring teeth or discs arranged to be drawn over the ground to pulverise and smooth the soil. When the ground has stubble, weeds or other trash on its surface, the cultivating members become clogged so that it is necessary to cease cultivation and clear away the trash.
It is an object of the present invention to provide harrows which are less liable to clogging than those presently available.
The present invention accordingly provides harrows comprising a main beam, means for attaching the main beam to a prime mover to be drawn at right angles to the direction of travel at least one sub-frame fixed to the main beam and extending rearwardly of the main beam, each sub-frame supporting a spiked roller at an angle of between 50° and 55° to the direction of travel.
The preferred angle between each roller and the direction of travel is 53°.
The spikes on each roller are preferably located on a helical line around the surface of the roller, with the helices on all rollers running in the same direction. The angle of such a helix to the axis of the roller is between 50° and 55°, preferably 53°.
Preferably, each spike extends from the surface of the roller so that the angle between the axis of the spike and the axis of the roller is between 50° and 55°. The most preferred angle between the axis of the spike and the axis of the roller is 53°
It is also preferred that the angles: between the roller and the direction of travel; and between the axis of the spike and the axis of the roller, are chosen such that the axes of the spikes are substantially parallel to the direction of travel when the spikes at the trailing edge of the roller pass through a horizontal plane. Practical embodiments of harrows according to the present invention will now be described with reference to the accompanying drawings.
Fig. 1 is a schematic plan view of one embodiment of the harrows;
Fig. 2 is an elevation on a larger scale of a roller in the direction 2-2 of Fig. 1;
Fig. 3 is an elevation on the direction 3-3 of Fig. 1 showing the matter of mounting a roller on a sub-frame.
Referring now to figures 1 to 3 of the drawings, the harrows comprise a main beam 10 having a tow-bar 11 fixed thereto centrally at right angles. Struts 12 maintain the members 10 and 11 at right angles when subjected to the stresses encountered in use. The height of the beam 10 above the ground can be adjusted in known manner by raising or lowering the ground wheels 13.
Four sub-frames each comprising two rigid beams, of which the beams 14 are shorter than the beams 15 are fixed at right angles to the beam 10, ie. parallel to the direction of travel. Each sub- frame further comprises a carrier beam 16 fixed to the rearward ends of the beams 14 and 15. The sub-frames are mounted in known spring-loaded manner (not shown in the drawings) to provide "stump jump" ability. The relative lengths of the beams 14 and 15 are such that the angle 17 between the beam 16 and the direction of travel is 53°. Check plates 18 extend below the beams 16 at each end thereof.
A roller 19 is journalled in the check plates 18 to extend between them. Spikes 20 are fixed to the outer surface of the roller 19 at locations lying on a helix. The helices on all the rollers run in the same direction. The angle of the helix to the axis of the roller is 53°.
Each spike protrudes from the roller such that its axis is at an angle of 53° to the axis of the roller.
The spacing of the sub-frames is such that the areas of ground traversed by the rollers 19 overlap to a small extent. In use, as the harrows are drawn across the ground the rollers 19 rotate as a result of engaging with the ground. Trash caught up in the spikes is pushed laterally towards the outer edges of the area traversed.
If it is desired to concentrate the trash in a central pile, the disposition of the rollers with respect to the direction of travel is reversed, by arranging the shorter beams 14 nearer to the central axis of the harrows than the beams 15. The angles 17, of 53°, would then be located on the opposite sides of the beams 14 and 15.
A further embodiment of the invention having only one roller is useful in confined areas such as between the rows of trees in an orchard. (This embodiment is not illustrated in the drawings.) This embodiment is based on a single sub-frame similar to each of the four sub-frames illustrated in Figure 1. This embodiment of the harrows includes a short main beam having only two rigid beams (similar to beams 14 and 15 of Figure 1) fixed at right angles to the main beam. As with the embodiment of Figure 1, a carrier beam similar to 16 is fixed to the rearward ends of these rigid beams. Check plates similar to check plates 18 extend below this carrier beam. A spiked roller similar to spiked roller 19 is journalled in these check plates to extend between them.
Yet further embodiments of the invention incorporate a relatively smaller roller disposed centrally of the other rollers of the harrow. Such an embodiment of the invention could be similar to the embodiment of Figure 1, but differing from that figure in that there is a fifth roller disposed between the innermost two rollers, and straddling the central axis of the machine. The longitudinal axis of such a roller may be at an angle either clockwise or anti-clockwise from the direction of travel. Such a roller covers the gap in ground coverage between the inner edges of the two inner rollers, and can also be used for spreading chemicals.

Claims

We claim:
1. Harrows comprising a main beam, means for attaching the main beam to a prime mover to be drawn at right angles to the direction of travel, at feast one sub-frame fixed to the main beam and extending rearwardly of the main beam, each sub-frame supporting a spiked roller at an angle of between 50° and 55° to the direction of travel.
2. Harrows according to claim 1 wherein there are two or more sub-frames, at least one sub- frame supporting a spiked roller at an angle of between 50° and 55° clockwise from the direction of travel, and at least one sub-frame supporting a spiked roller at an angle of between 50° and 55° anti-clockwise from the direction of travel.
3. Harrows according to claim 2, wherein rollers on one side of a central, axis of the harrow are disposed clockwise from the direction of travel and rollers on the other side of said axis are disposed anti clockwise from the direction of travel.
4. Harrows according to any one of the preceding claims wherein the angle between the rollers and the direction of travel is 53°.
5. Harrows according to any one of the preceding claims, wherein the spikes on each roller are fixed to the roller at locations lying on a helix around the surface of the roller and wherein the helices on all rollers run in the same direction.
6. Harrows according to claim S. wherein the angle of the helix to the axis of the roller is between 50° and 55°.
7. Harrows according to claim 6, wherein the angle of the helix to the axis of the roller is
8. Harrows according to any one of the preceding claims, wherein each spike extends from the surface of the roller so that the angle between the axis of the spike and the axis of the roller is between 50° and 55°.
9. Harrows according to claim 8, wherein the angle between the axis of the spike and the axis of the roller is 53°.
10. Harrows according to any one of the preceding claims, wherein the axis of each spike is substantially parallel to the direction of travel when the spike passes through the horizontal plane at the trailing edge of the roller.
11. Harrows substantially as herein described with reference to and as illustrated by the accompanying drawings.
PCT/AU1997/000315 1996-05-27 1997-05-23 Self-cleaning rotary trash harrow Ceased WO1997044995A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002256541A CA2256541A1 (en) 1996-05-27 1997-05-23 Self-cleaning rotary trash harrow
AU27577/97A AU2757797A (en) 1996-05-27 1997-05-23 Self-cleaning rotary trash harrow
EP97921531A EP0909123A1 (en) 1996-05-27 1997-05-23 Self-cleaning rotary trash harrow
NZ333466A NZ333466A (en) 1996-05-27 1997-05-23 Self-cleaning rotary trash harrow with lateral main beam and sub-frame(s) extending rearwardly supporting a spiked roller with spikes on helical path around roller

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPO0081A AUPO008196A0 (en) 1996-05-27 1996-05-27 Rotary trash harrow
AUPO0081 1996-05-27

Publications (1)

Publication Number Publication Date
WO1997044995A1 true WO1997044995A1 (en) 1997-12-04

Family

ID=3794397

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1997/000315 Ceased WO1997044995A1 (en) 1996-05-27 1997-05-23 Self-cleaning rotary trash harrow

Country Status (6)

Country Link
EP (1) EP0909123A1 (en)
AU (1) AUPO008196A0 (en)
CA (1) CA2256541A1 (en)
HR (1) HRP970295A2 (en)
NZ (1) NZ333466A (en)
WO (1) WO1997044995A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041341A1 (en) * 1980-05-29 1981-12-09 Howard Machinery P.L.C. Cultivating machine rotor
AU4307485A (en) * 1984-05-28 1985-12-05 Adlox Pty. Ltd. Improvements in and relating to rotary harrows
AU7311487A (en) * 1986-05-15 1987-11-19 E.S. & M.J. Heard Pty. Ltd. Improvements relating to agricultural machinery
AU2898589A (en) * 1989-02-01 1989-08-03 Walter Oechsle Lawn comber attachment
AU3931189A (en) * 1988-08-05 1990-02-08 Walkers Merredin Pty Ltd Rotary soil working tool
AU6097490A (en) * 1989-08-21 1991-02-21 Lyell James Woolford Harrow frame
US5158145A (en) * 1991-07-30 1992-10-27 John Karchewski Cultivator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041341A1 (en) * 1980-05-29 1981-12-09 Howard Machinery P.L.C. Cultivating machine rotor
AU4307485A (en) * 1984-05-28 1985-12-05 Adlox Pty. Ltd. Improvements in and relating to rotary harrows
AU7311487A (en) * 1986-05-15 1987-11-19 E.S. & M.J. Heard Pty. Ltd. Improvements relating to agricultural machinery
AU3931189A (en) * 1988-08-05 1990-02-08 Walkers Merredin Pty Ltd Rotary soil working tool
AU2898589A (en) * 1989-02-01 1989-08-03 Walter Oechsle Lawn comber attachment
AU6097490A (en) * 1989-08-21 1991-02-21 Lyell James Woolford Harrow frame
US5158145A (en) * 1991-07-30 1992-10-27 John Karchewski Cultivator

Also Published As

Publication number Publication date
NZ333466A (en) 2000-06-23
AUPO008196A0 (en) 1996-06-20
CA2256541A1 (en) 1997-12-04
EP0909123A1 (en) 1999-04-21
HRP970295A2 (en) 1998-04-30

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