CA1113768A - Roll with annular disks - Google Patents
Roll with annular disksInfo
- Publication number
- CA1113768A CA1113768A CA333,704A CA333704A CA1113768A CA 1113768 A CA1113768 A CA 1113768A CA 333704 A CA333704 A CA 333704A CA 1113768 A CA1113768 A CA 1113768A
- Authority
- CA
- Canada
- Prior art keywords
- harrow
- adjustment device
- section
- pivots
- ground
- 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.)
- Expired
Links
Landscapes
- Soil Working Implements (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention relates to an adjustment device for a harrow of the kind intended to work soil said harrow consisting of external sections which can be folded away in the transportation position and a central section, each section comprising a first adjustment device for regulating the height of the frame as well as a second adjustment device for regulating the angular position of the pivots for the harrow tines. The invention is characterized by linking elements, for the effective connection of the first and/or the second adjustment device on one section to the corresponding adjustment device on at least one adjacent section, in order to give the for the harrow tines on the sections concerned the same height above the ground and/or the same angular position.
The invention relates to an adjustment device for a harrow of the kind intended to work soil said harrow consisting of external sections which can be folded away in the transportation position and a central section, each section comprising a first adjustment device for regulating the height of the frame as well as a second adjustment device for regulating the angular position of the pivots for the harrow tines. The invention is characterized by linking elements, for the effective connection of the first and/or the second adjustment device on one section to the corresponding adjustment device on at least one adjacent section, in order to give the for the harrow tines on the sections concerned the same height above the ground and/or the same angular position.
Description
11137~8 Harrows for working the soil, expecially ones for working in fields, are generally in several sections arranged adjacent to each other and linked together. Normally, the considerable width of the harrow - 5-15 metres in the working position - can be reduced to around 3 metres by folding inlthe external sections towards and onto the central section, thus allowlng transportation on the roads. The central section is then equipped with a coupling element for towing, and transportation wheels.
Each harrow section is composed of a frame formed by bars to which several parallel pivots are rotatably connected, being arranged in the transverse direction of the harrow and having fixed on them the harrow prongs or tines for working the soil. Each frame is held up by support elements which are generally in the form of skids or wheels, and which can be adjusted vertically by means of adjustment devices to regulate the working depth of the harrow tines. When the frame has been height-adjusted all the harrow tines arranged on the frame have the same working depth.
As already mentioned, the pivots for the harrow tines are rotatable.
; This means that the harrow tines can be adjusted so that the points of the tines which work the soil take up the desired effective angle in the ground.
Each harrow section has separate adjustment devices both for the working depth and for the effective angle. Adjustment is not very practical, due to the fact that the adjustment devices are sited at different points on the harrow and are frequently relatively far apart. The invention eliminates this problem and aims to produce a harrow with very easy manipulation.
The invention will now be described in more detail with reference to the attached drawings. Figure 1 is a plan view of a harrow. Figure 2 shows the harrow with certain parts sectioned along the line II-II in Figure 1.
Figure 3 shows the harrow viewed from the right-hand side of Figure 1.
In Figure 1, the numeral 1 designates the harrow as a whole. In the construction from shown, the harrow is composed of a central section 3 :,.
,.
- 1 -- ~
- . . .
.
.
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1113~68 with lateral sections 4a and 4b arranged on either side of it. By means of articulated connections 5a and 5b the central section is pivotably connected to the lateral sections disposed on either side externally to the central section. The lateral or external sections can thus be pivoted upwards and inwards relative to the central section to reduce the width of the harrow, preferably when being towed on the road. For this purpose the harrow is equipped with a tow-bar 2 which is attached to the front cross-bar 6 of the frame of the central section. The front cross-bars of the lateral sections are designated 7a and 7b respectively. The sections also have bars connected to the cross-bars 6, 7a and 7b, the bars of the central section being desig-nated lla and llb, while those of the left and right external sections are designated 12a and 12b respectively.
The rotatable pivots 15 for the harrow tines are arranged between the bars lla, llb on the central section, and the harrow tines 14 are set on these pivots in such a way that their points or tips dig into and work the soil, as will be described in more detail below. In the same way, the pivots 13 for the harrow tines extend between the bars 12a and 12b of the lateral sections and the fixed harrow tines 14 are arranged on these pivots as shown in the right-hand part of Figure 1. The arrangement for making the harrow tine pivots rotate is described and shown in more detail relative to Figure 3.
The frames of the sections are held up by support elements resting on the ground which are vertically movable relative to the frames, so that the latter and the rotatable pivots for the harrow tines may be ad~usted to differ-end distances above the ground. In this way, the points of the harrow tines may also be adjusted to penetrate to different depths in the ground, that is, so that they obtain different working depths.
In the embodiment shown, the support elements of the central section are formed by bogies 8a and 8b fitted with wheels and attached inside the frame of the central section. As the latter is supported by the towing eye of the
Each harrow section is composed of a frame formed by bars to which several parallel pivots are rotatably connected, being arranged in the transverse direction of the harrow and having fixed on them the harrow prongs or tines for working the soil. Each frame is held up by support elements which are generally in the form of skids or wheels, and which can be adjusted vertically by means of adjustment devices to regulate the working depth of the harrow tines. When the frame has been height-adjusted all the harrow tines arranged on the frame have the same working depth.
As already mentioned, the pivots for the harrow tines are rotatable.
; This means that the harrow tines can be adjusted so that the points of the tines which work the soil take up the desired effective angle in the ground.
Each harrow section has separate adjustment devices both for the working depth and for the effective angle. Adjustment is not very practical, due to the fact that the adjustment devices are sited at different points on the harrow and are frequently relatively far apart. The invention eliminates this problem and aims to produce a harrow with very easy manipulation.
The invention will now be described in more detail with reference to the attached drawings. Figure 1 is a plan view of a harrow. Figure 2 shows the harrow with certain parts sectioned along the line II-II in Figure 1.
Figure 3 shows the harrow viewed from the right-hand side of Figure 1.
In Figure 1, the numeral 1 designates the harrow as a whole. In the construction from shown, the harrow is composed of a central section 3 :,.
,.
- 1 -- ~
- . . .
.
.
, , - : ., : :: . : :
': , ' '. ~ ' ; ' .', ' :,: ' ' ' - :
1113~68 with lateral sections 4a and 4b arranged on either side of it. By means of articulated connections 5a and 5b the central section is pivotably connected to the lateral sections disposed on either side externally to the central section. The lateral or external sections can thus be pivoted upwards and inwards relative to the central section to reduce the width of the harrow, preferably when being towed on the road. For this purpose the harrow is equipped with a tow-bar 2 which is attached to the front cross-bar 6 of the frame of the central section. The front cross-bars of the lateral sections are designated 7a and 7b respectively. The sections also have bars connected to the cross-bars 6, 7a and 7b, the bars of the central section being desig-nated lla and llb, while those of the left and right external sections are designated 12a and 12b respectively.
The rotatable pivots 15 for the harrow tines are arranged between the bars lla, llb on the central section, and the harrow tines 14 are set on these pivots in such a way that their points or tips dig into and work the soil, as will be described in more detail below. In the same way, the pivots 13 for the harrow tines extend between the bars 12a and 12b of the lateral sections and the fixed harrow tines 14 are arranged on these pivots as shown in the right-hand part of Figure 1. The arrangement for making the harrow tine pivots rotate is described and shown in more detail relative to Figure 3.
The frames of the sections are held up by support elements resting on the ground which are vertically movable relative to the frames, so that the latter and the rotatable pivots for the harrow tines may be ad~usted to differ-end distances above the ground. In this way, the points of the harrow tines may also be adjusted to penetrate to different depths in the ground, that is, so that they obtain different working depths.
In the embodiment shown, the support elements of the central section are formed by bogies 8a and 8b fitted with wheels and attached inside the frame of the central section. As the latter is supported by the towing eye of the
- 2 -~11376~
tow-bar and by the four wheels, it travels very smoothly, even over very rough ground. The arrangement will be described in more detall relative to Figure 2.
The support elements of the external sections are formed by skids 16 arranged vertically pivotable on the external bar of the relevant external section, and connected pivotably to the respective bars 12a and 12b by means of articulated parallel arms slanting downwards. 17 designates the front articulated arms and 18 designates the rear articulated arms. The skids are very long, so that the external sections also travel smoothly over rough ground.
The front articulated arms 17 are attached to the external ends by transverse torsion bars 19 extending along the cross-bars 7a and 7b. At their internal ends pointing towards the central section, the torsion bars are fitted with arms 20a and 20b pointing upwards and located directly above the articulat-ed connections 5a and 5b. The pivoting of the components 20b, l9b and 17b makes it possible to adjust the support element 16b in the form of a skid, by means of the rear skid arm 18b, to different heights relative to the frame of the central section, so that the rotatable pivots for the harrow discs thereof may be adjusted to different distances above the ground. The upper end of the adjustment arm 20b has articulated on it one of the ends of an adjustment bar 21b which is connected to the height-ad~ustment elements for the bogies 8a and 8b, as will be described in the following relative to Figures 2 and 3.
Figure 2 shows how the bogie is connected to the frame of the central section 3. Each bogie 8a, 8b is composed of two wheels, prefçrably wheels with pneumatic rubber tires, the axles of which are supported at each end by a double bogie girder 34 inside which the wheels are located. The bogie can pivot around a bogie axle 32 on an articulated adjustment arm or bogie arm 30, which is pivotably connected to a harrow tine axls 15 via an articulated coupling 31. During pivoting of the articulated bogie arm 30 around the pivot articulation 31 the bogie axle 32 is displaced vertically
tow-bar and by the four wheels, it travels very smoothly, even over very rough ground. The arrangement will be described in more detall relative to Figure 2.
The support elements of the external sections are formed by skids 16 arranged vertically pivotable on the external bar of the relevant external section, and connected pivotably to the respective bars 12a and 12b by means of articulated parallel arms slanting downwards. 17 designates the front articulated arms and 18 designates the rear articulated arms. The skids are very long, so that the external sections also travel smoothly over rough ground.
The front articulated arms 17 are attached to the external ends by transverse torsion bars 19 extending along the cross-bars 7a and 7b. At their internal ends pointing towards the central section, the torsion bars are fitted with arms 20a and 20b pointing upwards and located directly above the articulat-ed connections 5a and 5b. The pivoting of the components 20b, l9b and 17b makes it possible to adjust the support element 16b in the form of a skid, by means of the rear skid arm 18b, to different heights relative to the frame of the central section, so that the rotatable pivots for the harrow discs thereof may be adjusted to different distances above the ground. The upper end of the adjustment arm 20b has articulated on it one of the ends of an adjustment bar 21b which is connected to the height-ad~ustment elements for the bogies 8a and 8b, as will be described in the following relative to Figures 2 and 3.
Figure 2 shows how the bogie is connected to the frame of the central section 3. Each bogie 8a, 8b is composed of two wheels, prefçrably wheels with pneumatic rubber tires, the axles of which are supported at each end by a double bogie girder 34 inside which the wheels are located. The bogie can pivot around a bogie axle 32 on an articulated adjustment arm or bogie arm 30, which is pivotably connected to a harrow tine axls 15 via an articulated coupling 31. During pivoting of the articulated bogie arm 30 around the pivot articulation 31 the bogie axle 32 is displaced vertically
- 3 -~2~
..
' 1~13~68 and the working depth of the harrow tines can thus be adjusted in the manner described above.
The pivoting of the articulated bogie arm 30 is realised by means of a power source 36, such as a hydraulic jack, for example, which acts, by means of a pivoting arm 37 and an articulated arm 38, on a control shaft 35 on the articulated arm 30. When the latter pivots, the adjustment bar 21a, 21b is displaced so that the adjustment arms 20a and 20b co-acting with it rotate the torsion bars and the skid arms l9b and 17b, and l9a and 17a respec-tively. The said components are arranged so that the pivots 15, 13a and 13b respectively for the harrow tines on all the secticns 3, 4a and 4b are adjusted to the same height above the ground, that is to say, so that all the harrow tines 14 have the same working depth.
The movement elements 30, 35, 38, 37, 36 and 2 shown in Figure 2, together with the levers and the articulated arms (not designated) arranged on the cross-bar 6 are such that the frame of the central section supported by the wheel bogies 8a and 8b, together with the towing eye 39 on the tow-bar, are displaced parallel with the ground in a way which is known per se during adjust-ment in the height direction.
Figure 2 also shows the adjustment device for the angular position of the harrow pivots. The rear pivot 15 for the harrow tines is actuated by ;
an adjustment device 40 by means of an adjustment arm 26. All~the pivots for the harrow tines have similar adjusting arms, which are interconnected via an element 27 in such a way that all the pivots for the harrow tines are obliged to take up the same angular position within the secti`on.
; Figure 3 shows how displacement of the adjustment bar 21b causes the adjustment arm 20b, the torsion bar l9b and the arm 17b to rotate. The bar 12b of the external section, the skid 16b and the arms 17b and 18b form a parallelogram system such that the frame of the external section moves parallel vertically to the ground. In this way, all the pivots for the harrow
..
' 1~13~68 and the working depth of the harrow tines can thus be adjusted in the manner described above.
The pivoting of the articulated bogie arm 30 is realised by means of a power source 36, such as a hydraulic jack, for example, which acts, by means of a pivoting arm 37 and an articulated arm 38, on a control shaft 35 on the articulated arm 30. When the latter pivots, the adjustment bar 21a, 21b is displaced so that the adjustment arms 20a and 20b co-acting with it rotate the torsion bars and the skid arms l9b and 17b, and l9a and 17a respec-tively. The said components are arranged so that the pivots 15, 13a and 13b respectively for the harrow tines on all the secticns 3, 4a and 4b are adjusted to the same height above the ground, that is to say, so that all the harrow tines 14 have the same working depth.
The movement elements 30, 35, 38, 37, 36 and 2 shown in Figure 2, together with the levers and the articulated arms (not designated) arranged on the cross-bar 6 are such that the frame of the central section supported by the wheel bogies 8a and 8b, together with the towing eye 39 on the tow-bar, are displaced parallel with the ground in a way which is known per se during adjust-ment in the height direction.
Figure 2 also shows the adjustment device for the angular position of the harrow pivots. The rear pivot 15 for the harrow tines is actuated by ;
an adjustment device 40 by means of an adjustment arm 26. All~the pivots for the harrow tines have similar adjusting arms, which are interconnected via an element 27 in such a way that all the pivots for the harrow tines are obliged to take up the same angular position within the secti`on.
; Figure 3 shows how displacement of the adjustment bar 21b causes the adjustment arm 20b, the torsion bar l9b and the arm 17b to rotate. The bar 12b of the external section, the skid 16b and the arms 17b and 18b form a parallelogram system such that the frame of the external section moves parallel vertically to the ground. In this way, all the pivots for the harrow
- 4 -', ' :
' 1ll376~
tines are the same height above the ground. In addition, due to the connect-ing elements 17b, l9b, 20b, 21b, 33 and 30, the harrow pivots 15 of the central section 3 as well as the harrow pivots 13a and 13b of the external sections 4a and 4b are the same height above the ground, since the devices described above for one of the external sections are provided in an identical manner, but re-versed, on the other external section.
Figure 3 also shows how the ad~ustment device 40b makes it possible to adjust the angular position of the pivots 13b for the harrow tines on an external section 4b. Thearrangement corresponds exactly to the preceding one for the central section 3. Figure 3 also shows how the harrow tine 14 is arranged relative to the pivot 13b for the harrow tines, as well as its mounting on it. All the harrow tines 14 are fixed in the same way on their respective pivots, that is to say, on the pivots 15, 13a and 13b.
All the pivots for the harrow tines on all the sections have been described above as to the way in which they are ad~usted to the same height above the ground by the linking of the ad~ustment devices of the vari-ous sections by means of the appropriate devices, this being in the described embodiment the adjustment bars 21a and 21b arranged on the pivoting articula-tions 5a and 5b between the sections 3, 4a and 4b and thus the adjustment arms 20a and 20b co-acting with them. Figures 2 and 3 show how it is possible in a corresponding manner to connect by means of suitable components the elements 26, 27; 27a and 27b for the pivoting of the pivots for the harrow tines so that all the pivots for the harrow tines on all the sections of the harrow are ~-sdjusted to the same angle and so that therefore all the harrow discs are adjusted to the same effective angle in the ground.
To ad~ust the angular position of the pivots for the harrow tines, it is possible to use an arrangement corresponding to the arrangement 40 or ; 40b shown in the Figures. If necessary, this arrangement is located preferably at a suitable place on the central section from whence the adjustment movement causes the pivots for the harrow tines on the external section to take up the
' 1ll376~
tines are the same height above the ground. In addition, due to the connect-ing elements 17b, l9b, 20b, 21b, 33 and 30, the harrow pivots 15 of the central section 3 as well as the harrow pivots 13a and 13b of the external sections 4a and 4b are the same height above the ground, since the devices described above for one of the external sections are provided in an identical manner, but re-versed, on the other external section.
Figure 3 also shows how the ad~ustment device 40b makes it possible to adjust the angular position of the pivots 13b for the harrow tines on an external section 4b. Thearrangement corresponds exactly to the preceding one for the central section 3. Figure 3 also shows how the harrow tine 14 is arranged relative to the pivot 13b for the harrow tines, as well as its mounting on it. All the harrow tines 14 are fixed in the same way on their respective pivots, that is to say, on the pivots 15, 13a and 13b.
All the pivots for the harrow tines on all the sections have been described above as to the way in which they are ad~usted to the same height above the ground by the linking of the ad~ustment devices of the vari-ous sections by means of the appropriate devices, this being in the described embodiment the adjustment bars 21a and 21b arranged on the pivoting articula-tions 5a and 5b between the sections 3, 4a and 4b and thus the adjustment arms 20a and 20b co-acting with them. Figures 2 and 3 show how it is possible in a corresponding manner to connect by means of suitable components the elements 26, 27; 27a and 27b for the pivoting of the pivots for the harrow tines so that all the pivots for the harrow tines on all the sections of the harrow are ~-sdjusted to the same angle and so that therefore all the harrow discs are adjusted to the same effective angle in the ground.
To ad~ust the angular position of the pivots for the harrow tines, it is possible to use an arrangement corresponding to the arrangement 40 or ; 40b shown in the Figures. If necessary, this arrangement is located preferably at a suitable place on the central section from whence the adjustment movement causes the pivots for the harrow tines on the external section to take up the
- 5 -..
.
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- . . .: . ~ . : . . :
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1~68 desired angle by means of movement transmission elements. If the adjustment calls for considerable force, this adjustment movement may also be effected by means of a power arrangement corresponding to the hydraulic jack 36 for the height adjustment. If the power source for the two adjustment arrangements is hydraulic the vertical and angular adjustment of the pivots for the harrow tines may be effected from the cab of the tractor driver, which provides maximum convenience.
To regulate the adjustment devices on adjoining sections of the same unit relative to one another for example so that the pivots for the harrow tines of the two sections may be adjusted to the same height or to the same pivoting angle, it is possible to provide means for pre-adjustment in the elements which transmit the adjustment movement between the sections. Figure 3 shows how a turnbuckle 25b has been provided in the bar 21b for this purpose, to extend or shorten the latter, which makes it possible to modify the relative height of the pivots of harrow tines on adjacent sections.
.
.. :. . .. . :
- . . .: . ~ . : . . :
- . ~ . : . : . . . -. ' , :' - : ' , - -. :, ' ,, : ,. : ., ,,, . : ,.. ,: , ~ . , .
1~68 desired angle by means of movement transmission elements. If the adjustment calls for considerable force, this adjustment movement may also be effected by means of a power arrangement corresponding to the hydraulic jack 36 for the height adjustment. If the power source for the two adjustment arrangements is hydraulic the vertical and angular adjustment of the pivots for the harrow tines may be effected from the cab of the tractor driver, which provides maximum convenience.
To regulate the adjustment devices on adjoining sections of the same unit relative to one another for example so that the pivots for the harrow tines of the two sections may be adjusted to the same height or to the same pivoting angle, it is possible to provide means for pre-adjustment in the elements which transmit the adjustment movement between the sections. Figure 3 shows how a turnbuckle 25b has been provided in the bar 21b for this purpose, to extend or shorten the latter, which makes it possible to modify the relative height of the pivots of harrow tines on adjacent sections.
6 --'
Claims (8)
1. An adjustment device for a harrow of the kind intended to work soil and designed to be attached to a tractor, said harrow comprising external sections which can be folded away in the transporation position, and a central section, each section having a frame which is composed of at least one cross-bar and two bars, each frame bearing at least two transverse rotatable harrow tine pivots for the attachment of harrow tines, harrow prongs or the like for digging into and working the soil, said frames also having respective support elements which are adjustable in height and resting on the ground; in addition, each section comprises a first adjustment device for regulating the height of the frame and thus the height of the pivots for the harrow tines above the ground in order to adjust the working depth of the harrow tines, as well as a second adjustment device for adjusting the angular position of the pivots for the harrow tines, in order to adjust the effective angle of the latter in the ground, characterized by linking elements, for the effective connection of the first and/or the second adjustment device on one section to the corresponding adjustment device on at least one adjacent section, in order to give the pivots for the harrow tines on the sections concerned the same height above the ground and/or the same angular position.
2. An adjustment device according to claim 1, characterized in that the support elements of the central section are formed by two wheel bogies, the axle of the bogie being articulately mounted on one end of an arm by means of an angular lever pivotably connected to a pivot for harrow tines, the other end of the arm being connected to the first adjustment device for adjusting the height position of the wheel bogies relative to the frame of the section.
3. An adjustment device according to claim 2, characterized in that the lowest adjustment position of the wheel bogies is adapted so that, in the folded-away state, all the parts of the harrow are disengaged from the ground in order to allow the harrow to be towed by means of the wheel bogies, for example, on a road.
4. An adjustment device according to claim 2 or 3, characterized in that the bogie axle is arranged in the longitudinal direction approximately in the centre of gravity of the harrow when this is in its folded state.
5. An adjustment device according to claim 1 characterized in that the support elements of an external section are formed by at least one skid resting on the ground and arranged on the external bar of that section.
6. An adjustment device according to claim 5, characterized in that the skid is connected to a bar by means of pivotable arms, the front arm being mounted preferably at one end on a torsion bar arranged in the section frame, and having on the other end a lever effectively connected to a further lever arranged on the adjacent section, the said elements forming part of the first adjustment device for adjusting the pivots on the harrow tines on at least two adjacent sections of the harrow to the same height.
7. An adjustment device according to claim 1, 2 or 3, characterized in that the first adjustment device is designed so that the section frame is mainly displaced horizontally during the height movement.
8. An adjustment device according to claim 1, characterized in that the linking elements comprise an adjustment device which makes possible the relative displacement of the adjustment devices of the sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA333,704A CA1113768A (en) | 1979-08-14 | 1979-08-14 | Roll with annular disks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA333,704A CA1113768A (en) | 1979-08-14 | 1979-08-14 | Roll with annular disks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1113768A true CA1113768A (en) | 1981-12-08 |
Family
ID=4114922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA333,704A Expired CA1113768A (en) | 1979-08-14 | 1979-08-14 | Roll with annular disks |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1113768A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655296A (en) * | 1985-02-15 | 1987-04-07 | F. P. Bourgault Industries, Ltd. | Farming implement with wheel depth control |
| GB2465818A (en) * | 2008-12-02 | 2010-06-09 | Cousins Of Emneth Ltd | An agricultural cultivator having a plurality of soil working tools |
-
1979
- 1979-08-14 CA CA333,704A patent/CA1113768A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655296A (en) * | 1985-02-15 | 1987-04-07 | F. P. Bourgault Industries, Ltd. | Farming implement with wheel depth control |
| GB2465818A (en) * | 2008-12-02 | 2010-06-09 | Cousins Of Emneth Ltd | An agricultural cultivator having a plurality of soil working tools |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |