CA1202529A - Track-marker for an agricultural machine - Google Patents
Track-marker for an agricultural machineInfo
- Publication number
- CA1202529A CA1202529A CA000441299A CA441299A CA1202529A CA 1202529 A CA1202529 A CA 1202529A CA 000441299 A CA000441299 A CA 000441299A CA 441299 A CA441299 A CA 441299A CA 1202529 A CA1202529 A CA 1202529A
- Authority
- CA
- Canada
- Prior art keywords
- track
- boom
- tension element
- frame
- marker
- 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
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
- A01B69/00—Steering of agricultural machines or implements; Guiding agricultural machines or implements on a desired track
- A01B69/02—Ridge-marking or like devices; Checkrow wires; Accessories therefor
- A01B69/024—Ridge-marking or like devices; Checkrow wires; Accessories therefor adapted to cut and form a ridge or forrow in the soil surface, e.g. with a disc
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Guiding Agricultural Machines (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A track marker for an agricultural machine, arranged upon a boom secured to the frame of the machine:
by means of a hinge and adapted to move in both the vertical and the horizontal plane. In order to make it possible for the said track-marker to deflect upon encountering obstacles, so that the marker is not damaged, a tension element is arranged between the boom and the frame, at the front side of the boom as seen in the direction of travel, the attachment point of the said tension element being located at a distance in front of the hinge , as seen in the said direction of travel. The attachment point of the tension element to the frame lies upon a straight line, ascending as seen in the direction of travel, passing through the hinge, and enclosing an angle .alpha. of about 35° to the horizontal.
A track marker for an agricultural machine, arranged upon a boom secured to the frame of the machine:
by means of a hinge and adapted to move in both the vertical and the horizontal plane. In order to make it possible for the said track-marker to deflect upon encountering obstacles, so that the marker is not damaged, a tension element is arranged between the boom and the frame, at the front side of the boom as seen in the direction of travel, the attachment point of the said tension element being located at a distance in front of the hinge , as seen in the said direction of travel. The attachment point of the tension element to the frame lies upon a straight line, ascending as seen in the direction of travel, passing through the hinge, and enclosing an angle .alpha. of about 35° to the horizontal.
Description
~Z~5~
The present invention relates to a track~marker ~or an agricultural machine arranged upon a boom secured to the ~rame o~ the machine by hinge means and adapted to move in both the vertical and the horizontal plane.
A track-marker of this kind is already known from German OS 24 20 323. The boom of this track-marker is arranged to move freely on the frame of the machine by means of a so-called universal joint. Fitted to the end of ~he boom remote from the universal joint is a hydraulic motor which drives the track-marker. The rotational velocity of the hydraulic motor, and thus that of the track-marker is regulated by a valve controlled by a mechanism arranged on the universal joint. This ensures that the track-marker advances at the same speed as the machine; i.e. the machine and the tr~ck-marker are synchronised. The latter design of track-marker involves considerable technical expense which in many cases is unacceptably high.
US Patent 2,722,168 discloses a fur~her ~rack-marker; the boom of which is fitted to the frame of the machine in such a manner as to be pivotable in a vertical plane about a hinge. A tension element is arranged 7 between the frame of the machine and the outer end of the boom, on the front side thereo~ t as seen in the direction of travel~
the tension elemen-t being secured to the frame at a distance in front o~ the hinge, as seen in the direction of travel.
This tension element is intended to ensure that no lateral fle-~ural forces act upon the hinge; i.eO that the boom pivots only about the axis passi~g through the hinge in the direction of travel. The disadvantage o~ this track-marker is that, upon en~ou~tering an obstac~e, it cannot deflect and is ~herefore inevitably damaged.
i2~D
It is an aim of the present invention to simplify substantially, the track-marker described at the beginning hereof and, a~ t~e same time9 to provide a simple means whereby the said marker can deflect upon encountering an obstacle, in order to avoid damage to the marker or the boom thereof.
According to ~he invention, the aim is achie~ed in that, in a manner known per se, at least one tension element is arranged between the boom and the ~rame, at 10 the ~ront side of the said boom, as seen in the direction of travel, the tension element being secured to the ~rame at a distance in front of the hinge, as seen in ~he direction of travel 7 ~he attachment point of the tension element to the ~rame lying upon a straight line ascending in the direction of travel, passing through the hinge, and enclosing an angle of approximately 25 to 45 to the horizontal; and in that a ~top is provided to limit the ~orward pivoting movement ~f the boom.
As a result of this arrangement, the boom of ~he track-marker deflects upwardly and, above all~ rearwardly upon encountering obstacles, pivoting about an axis passing through the hinge and the point at which the tension element is secured to the frame. After the obstacle has been passed, the boo~ returns by gravit~ to its starting, i.e. operative, position.
According to another configuration of the invention, at least one tension element is arranged, between the boom and the frame, at the front side o~ the boom, as seen in the direction o~ travel, the tension element being securPd to 3Q the frame at a distance in front of the hinge, as seen in ~2~
the direction of travel 9 the attachment point of the tension element to the frame lying upon a straight line ascending as seen in the direction o~ travelg passing through the hinge~ and enclosing an angle of approximately 25 to 45 to the horizontalg at least one tension element being also secured, between the frame and the boom, at the rear side of the said boom, as seen in the direction of travel, the attachment point of this tension element to -the frame lying upon a straight line ascending in a direction opposite to the direotion of travel, passing through the hinge, and enclosing an angle o~ approximately 25 to 45 to the horizontal.
As a result of this arrangement, the boom can deflect upon encountering obstacles 9 when travelling either in forward or in reverse. This is achieved by corresponding suspension o~ the boom at the rear side al50.
Having thus generally described the nature o~
the invention, reference will now be made to the accompanying drawings, shvwing by way o~ illustration, a pre~erred embodiment thereof, and in whicho Figure 1 is a plan view o~ a track-marker arrange-ment in accordanre with the present invention;
Figure 2 is a side elevation o~ the arrangement track-mar~er shown in Fig. l;
Figure 3 is a plan view o~ a fur~her track marker arrangement in accordance with the present invention;
Figure 4 is a side elevation of the arrangement shown in Fig. 3;
3 Figure 5 is a rear view of the arrangement shown in Fig. 3;
~ 3 -~ 5 2~
Figure 6 is a plan view of a device for shortening the tension element; and Figure 7 is a plan view of an overload fracture element arranged ~etween the tension element and ~he boom.
: Referring now in detail to the drawings ~ a track-marker 1 according to Figs. 1 and 2 is mounted rotatably ~pon a boom 2. By hinge means in the ~o~m of a universal joint 3, boom 2 is arranged on frame 4 of an agricultural machine, ~not shown in detail~5 in such a manner that i^t can mo~e in a vertical and a horizontal plane.
Tension element 5 is arranged, between boom 2 and frame 4, on front side 7 of boom 2, as seen in the direction o~
travel 6. Tension element 5 is secured to ~rame 4 at a distance A in front of universal joint 3, a~ seen in the direction of travel. Attachment point 8 o~ tension element 5 lies upon a dott~d straight line 9 ascending 9 as seen in the direction of travel, passing through universal joint ~ t and enclosing an angle~ of approximately 35 to the horizontal 10. Arranged on front side 7 of boom 2 and bearing against ~rame 4 is a stop 11 which limits the forward pivoting movement of the boom. In this connection it has been found desirable that distance C between hinge 3 and the attachment point o~ tension element 5 on boom 2 be greater than distance D between hinge 3 and attachment point 8 of tension element 5 on frame 4.
Arranged upon tension element 5 i5 a de~ice 12 by means of which tension element 5 may be shortened or lengthened. In this example of embodiment, device 12 comprises a cable 13, one end of which is secured to tension element 5 by mean~ of a cable clamp 14, while the other end ~L2~2~ZS~
is secured to a hydraulic cylinder 15 arranged on frame 4.
As already indicated, device 12 allows tension element 5 to be shortened, so that boom 2 bears against stop 11 and slides upwardly thereon and track-marker 1 is raised.
In the case o~ a sowing machine, for example, this allows the track-markers arranged on each side to be raised and lowered alternately.
Referring now to operation of the track-marker 1.
Track-marker 1~ shown in the operative position projects laterally outwards from frame 4 o~ ~he machine. Since, according to the invention9 front side 7 of the boom is suspended by tension element 5, boom 2 and track-marker 1 can deflect rearwardly and upwardly upon encountering ob~tacles in its pa-th, in ~hat the said boom pivots obliquely rearwardly ~nd upwardly about straight line 9 ascending in a direction opposite to the direction of travel. In this way~ the said boom and track-marker moYe out of the way of the obstacle and are there~ore not damaged. ~ter the obstacle has been passed, the boom and track-marker pivot back automatlclly into the starting or operative position, Finally, boom 2 and track-marker 1 may be piYoted rear~ardly about strai~ht line 9 to assume a transportation position, the said boom and track-marker being then located in an area de~ined by frame 4. In this connection 3 it is particularly advantageous that attachment point 8 of tension element 5 be located, as seen in the direction of travel, on frame 4 on the side cf hinge 3 remote from track-marker 1 when the latter is in its operative position. This is the simplest way o~ holding boom 2 in the transportation position, since boom 2 cannot move over the "dead point"
wi-thout as~i~tance.
~Z~; ~SZ5~
According to Figs. 3 to 5, track-marker 16 is mounted rotatably upon a boom 17, boom 17 being arranged to pivot, by means o~ a hinge in the ~orm of a universal joint 3, on ~rame 18 of an agricultural machine, (not shown in detail), in a vertical and horizontal plane. Between boom 17 and frame 18, tension element 19 is arranged on ~ront side 20 o~ boom 17, as seen in the direction o~ travel.
Tension element 19 is secured to an eye 21 on ~rame 18 at a distance A in ~ront of universal joint 3~ as seen in the direction of travel, the said eye lying upon a dotted straight line 22 a~cending in the direction of travel 6 9 passing ~hrough universal joint 3, and enclosing an angle~o~ approximately 35 to the horizontal. As a result of this 7 the said attachment point lies in a plane above universal joint 3.
Furthermore, tension element 25 is arranged on rear side 24 of boom 17, as seen in the direction of travel, and is secured to eye 26 o~ a device 27 arranged on frame 18, at a distance B behind universal ~oint 3, a~ seen in ~he direction o~ travel. This at~achment point, in the ~orm of ~n eye 267 o~ ten~ion element 5 lies upon a dotted straight line ascending~ as seen in the ~irection of travel, in a direction opposite the direction of travel, and enclosing an angle of appro~imately 35 to the horizontal 230 Referring to Figure 6, device 27 is provided ~or the purpose o~ shortening or lengthening rear tension element 25, so that, in the case of a sowing machine, laterally arranged track-markers 1 may be raised and lowered alternately. Device 27 comprises a mounting 29, arranged to pivot upon frame 18, carrying a hydraulic cylinder 30 3o and a pivotable lever 31. Lever 31 pivots upon mounting 29 by means of joint 32 located intermediate the two outer ~2~529 ends o~ the said lever, one end of which is connected to the hydraulic cylinder~ while the other end is connected to tension element 25 by means o~ eye 26 comprising a bore 33. Track-marker 16 is thus raised or lowered by pivoting lever 31~
~ urning to the operation o~ track-marker 16 shown in FigsO 3 to 5. Track-marker 16, shown in its operative position, projects laterally outwards f`rom frame 18 of the machine. The suspension of boom 17, according to the invention, by means of tension elements 19 and 25,-allows the marker and boom 17 to move out o~ the way of any obstacles encountered t when the maohine or the marker are travelling either forwardly or in reverse, when the track-marker is moving forwardly, boom 17 pivots raarwardly and upwardly about straight line 22 acting as a pivot axis. When the track-mar~er is mo~ing in reverse, boom 17 pivots forwardly and upwardly about straight line 28 acting as a pivot axisc Thus in either cas~, neither the track-marker nor the boom is damaged.
~0 In order to avoid dam~ge to the boom and track-marker, under the most extreme conditions, an overload ~racture element 34 is arranged between front tension element 19 and frame 18, element 34 being in the form o~ a tripping device 35 comprising a shear pin 3~0 A~ will be appreciated, if the track-marker digs under an obstacle and the boom cannot therefore deflect upwardly, damage could occur without the presence o~ overload fracture element 34~ Therefore 9 when the marker cannot deflect upwardly, pin 36 is sheared off and pawl 37 o~ the tripping device pivots about bolt ~8 in ~he direction of arrow 39, thus releasing tension element 19 and allowing boom 17 to pivot freely rearward. After the -obs tacle has been passed, tension element 19 is re-hooked into pawl 37 and a new shear pin 36 is fitted. Operatisn can thus begin again immediately.
The present invention relates to a track~marker ~or an agricultural machine arranged upon a boom secured to the ~rame o~ the machine by hinge means and adapted to move in both the vertical and the horizontal plane.
A track-marker of this kind is already known from German OS 24 20 323. The boom of this track-marker is arranged to move freely on the frame of the machine by means of a so-called universal joint. Fitted to the end of ~he boom remote from the universal joint is a hydraulic motor which drives the track-marker. The rotational velocity of the hydraulic motor, and thus that of the track-marker is regulated by a valve controlled by a mechanism arranged on the universal joint. This ensures that the track-marker advances at the same speed as the machine; i.e. the machine and the tr~ck-marker are synchronised. The latter design of track-marker involves considerable technical expense which in many cases is unacceptably high.
US Patent 2,722,168 discloses a fur~her ~rack-marker; the boom of which is fitted to the frame of the machine in such a manner as to be pivotable in a vertical plane about a hinge. A tension element is arranged 7 between the frame of the machine and the outer end of the boom, on the front side thereo~ t as seen in the direction of travel~
the tension elemen-t being secured to the frame at a distance in front o~ the hinge, as seen in the direction of travel.
This tension element is intended to ensure that no lateral fle-~ural forces act upon the hinge; i.eO that the boom pivots only about the axis passi~g through the hinge in the direction of travel. The disadvantage o~ this track-marker is that, upon en~ou~tering an obstac~e, it cannot deflect and is ~herefore inevitably damaged.
i2~D
It is an aim of the present invention to simplify substantially, the track-marker described at the beginning hereof and, a~ t~e same time9 to provide a simple means whereby the said marker can deflect upon encountering an obstacle, in order to avoid damage to the marker or the boom thereof.
According to ~he invention, the aim is achie~ed in that, in a manner known per se, at least one tension element is arranged between the boom and the ~rame, at 10 the ~ront side of the said boom, as seen in the direction of travel, the tension element being secured to the ~rame at a distance in front of the hinge, as seen in ~he direction of travel 7 ~he attachment point of the tension element to the ~rame lying upon a straight line ascending in the direction of travel, passing through the hinge, and enclosing an angle of approximately 25 to 45 to the horizontal; and in that a ~top is provided to limit the ~orward pivoting movement ~f the boom.
As a result of this arrangement, the boom of ~he track-marker deflects upwardly and, above all~ rearwardly upon encountering obstacles, pivoting about an axis passing through the hinge and the point at which the tension element is secured to the frame. After the obstacle has been passed, the boo~ returns by gravit~ to its starting, i.e. operative, position.
According to another configuration of the invention, at least one tension element is arranged, between the boom and the frame, at the front side o~ the boom, as seen in the direction o~ travel, the tension element being securPd to 3Q the frame at a distance in front of the hinge, as seen in ~2~
the direction of travel 9 the attachment point of the tension element to the frame lying upon a straight line ascending as seen in the direction o~ travelg passing through the hinge~ and enclosing an angle of approximately 25 to 45 to the horizontalg at least one tension element being also secured, between the frame and the boom, at the rear side of the said boom, as seen in the direction of travel, the attachment point of this tension element to -the frame lying upon a straight line ascending in a direction opposite to the direotion of travel, passing through the hinge, and enclosing an angle o~ approximately 25 to 45 to the horizontal.
As a result of this arrangement, the boom can deflect upon encountering obstacles 9 when travelling either in forward or in reverse. This is achieved by corresponding suspension o~ the boom at the rear side al50.
Having thus generally described the nature o~
the invention, reference will now be made to the accompanying drawings, shvwing by way o~ illustration, a pre~erred embodiment thereof, and in whicho Figure 1 is a plan view o~ a track-marker arrange-ment in accordanre with the present invention;
Figure 2 is a side elevation o~ the arrangement track-mar~er shown in Fig. l;
Figure 3 is a plan view o~ a fur~her track marker arrangement in accordance with the present invention;
Figure 4 is a side elevation of the arrangement shown in Fig. 3;
3 Figure 5 is a rear view of the arrangement shown in Fig. 3;
~ 3 -~ 5 2~
Figure 6 is a plan view of a device for shortening the tension element; and Figure 7 is a plan view of an overload fracture element arranged ~etween the tension element and ~he boom.
: Referring now in detail to the drawings ~ a track-marker 1 according to Figs. 1 and 2 is mounted rotatably ~pon a boom 2. By hinge means in the ~o~m of a universal joint 3, boom 2 is arranged on frame 4 of an agricultural machine, ~not shown in detail~5 in such a manner that i^t can mo~e in a vertical and a horizontal plane.
Tension element 5 is arranged, between boom 2 and frame 4, on front side 7 of boom 2, as seen in the direction o~
travel 6. Tension element 5 is secured to ~rame 4 at a distance A in front of universal joint 3, a~ seen in the direction of travel. Attachment point 8 o~ tension element 5 lies upon a dott~d straight line 9 ascending 9 as seen in the direction of travel, passing through universal joint ~ t and enclosing an angle~ of approximately 35 to the horizontal 10. Arranged on front side 7 of boom 2 and bearing against ~rame 4 is a stop 11 which limits the forward pivoting movement of the boom. In this connection it has been found desirable that distance C between hinge 3 and the attachment point o~ tension element 5 on boom 2 be greater than distance D between hinge 3 and attachment point 8 of tension element 5 on frame 4.
Arranged upon tension element 5 i5 a de~ice 12 by means of which tension element 5 may be shortened or lengthened. In this example of embodiment, device 12 comprises a cable 13, one end of which is secured to tension element 5 by mean~ of a cable clamp 14, while the other end ~L2~2~ZS~
is secured to a hydraulic cylinder 15 arranged on frame 4.
As already indicated, device 12 allows tension element 5 to be shortened, so that boom 2 bears against stop 11 and slides upwardly thereon and track-marker 1 is raised.
In the case o~ a sowing machine, for example, this allows the track-markers arranged on each side to be raised and lowered alternately.
Referring now to operation of the track-marker 1.
Track-marker 1~ shown in the operative position projects laterally outwards from frame 4 o~ ~he machine. Since, according to the invention9 front side 7 of the boom is suspended by tension element 5, boom 2 and track-marker 1 can deflect rearwardly and upwardly upon encountering ob~tacles in its pa-th, in ~hat the said boom pivots obliquely rearwardly ~nd upwardly about straight line 9 ascending in a direction opposite to the direction of travel. In this way~ the said boom and track-marker moYe out of the way of the obstacle and are there~ore not damaged. ~ter the obstacle has been passed, the boom and track-marker pivot back automatlclly into the starting or operative position, Finally, boom 2 and track-marker 1 may be piYoted rear~ardly about strai~ht line 9 to assume a transportation position, the said boom and track-marker being then located in an area de~ined by frame 4. In this connection 3 it is particularly advantageous that attachment point 8 of tension element 5 be located, as seen in the direction of travel, on frame 4 on the side cf hinge 3 remote from track-marker 1 when the latter is in its operative position. This is the simplest way o~ holding boom 2 in the transportation position, since boom 2 cannot move over the "dead point"
wi-thout as~i~tance.
~Z~; ~SZ5~
According to Figs. 3 to 5, track-marker 16 is mounted rotatably upon a boom 17, boom 17 being arranged to pivot, by means o~ a hinge in the ~orm of a universal joint 3, on ~rame 18 of an agricultural machine, (not shown in detail), in a vertical and horizontal plane. Between boom 17 and frame 18, tension element 19 is arranged on ~ront side 20 o~ boom 17, as seen in the direction o~ travel.
Tension element 19 is secured to an eye 21 on ~rame 18 at a distance A in ~ront of universal joint 3~ as seen in the direction of travel, the said eye lying upon a dotted straight line 22 a~cending in the direction of travel 6 9 passing ~hrough universal joint 3, and enclosing an angle~o~ approximately 35 to the horizontal. As a result of this 7 the said attachment point lies in a plane above universal joint 3.
Furthermore, tension element 25 is arranged on rear side 24 of boom 17, as seen in the direction of travel, and is secured to eye 26 o~ a device 27 arranged on frame 18, at a distance B behind universal ~oint 3, a~ seen in ~he direction o~ travel. This at~achment point, in the ~orm of ~n eye 267 o~ ten~ion element 5 lies upon a dotted straight line ascending~ as seen in the ~irection of travel, in a direction opposite the direction of travel, and enclosing an angle of appro~imately 35 to the horizontal 230 Referring to Figure 6, device 27 is provided ~or the purpose o~ shortening or lengthening rear tension element 25, so that, in the case of a sowing machine, laterally arranged track-markers 1 may be raised and lowered alternately. Device 27 comprises a mounting 29, arranged to pivot upon frame 18, carrying a hydraulic cylinder 30 3o and a pivotable lever 31. Lever 31 pivots upon mounting 29 by means of joint 32 located intermediate the two outer ~2~529 ends o~ the said lever, one end of which is connected to the hydraulic cylinder~ while the other end is connected to tension element 25 by means o~ eye 26 comprising a bore 33. Track-marker 16 is thus raised or lowered by pivoting lever 31~
~ urning to the operation o~ track-marker 16 shown in FigsO 3 to 5. Track-marker 16, shown in its operative position, projects laterally outwards f`rom frame 18 of the machine. The suspension of boom 17, according to the invention, by means of tension elements 19 and 25,-allows the marker and boom 17 to move out o~ the way of any obstacles encountered t when the maohine or the marker are travelling either forwardly or in reverse, when the track-marker is moving forwardly, boom 17 pivots raarwardly and upwardly about straight line 22 acting as a pivot axis. When the track-mar~er is mo~ing in reverse, boom 17 pivots forwardly and upwardly about straight line 28 acting as a pivot axisc Thus in either cas~, neither the track-marker nor the boom is damaged.
~0 In order to avoid dam~ge to the boom and track-marker, under the most extreme conditions, an overload ~racture element 34 is arranged between front tension element 19 and frame 18, element 34 being in the form o~ a tripping device 35 comprising a shear pin 3~0 A~ will be appreciated, if the track-marker digs under an obstacle and the boom cannot therefore deflect upwardly, damage could occur without the presence o~ overload fracture element 34~ Therefore 9 when the marker cannot deflect upwardly, pin 36 is sheared off and pawl 37 o~ the tripping device pivots about bolt ~8 in ~he direction of arrow 39, thus releasing tension element 19 and allowing boom 17 to pivot freely rearward. After the -obs tacle has been passed, tension element 19 is re-hooked into pawl 37 and a new shear pin 36 is fitted. Operatisn can thus begin again immediately.
Claims (18)
1. A track-marker for an agricultural machine, arranged upon a boom secured to the frame of the machine by hinge means and adapted to move in both the vertical and the horizontal plane, characterized in that, in a manner known per se, at least one tension element is arranged between the boom and the frame, at the front side of the said boom, as seen in the direction of travel, said tension element being secured to the said frame at a distance (A), as seen in the direction of travel, in front of the hinge, the attachment point of said tension element to said frame lying upon a straight line, ascending as seen in the direction of travel, passing through the said hinge, and enclosing an angle (.alpha.) of approximately 25 to 45° to the horizontal, and in that a stop is provided to restrict the forward pivoting movement of the boom.
2. A track-marker for an agricultural machine, arranged upon a boom secured to the frame of the machine by hinge means and adapted to move in both the vertical and the horizontal plane, more particularly in a manner according to claim 1, characterized in that the stop is in the form of a tension element secured, between the frame and the boom, to the rear side of the said boom, as seen in the direction of travel.
3. A track-marker for an agricultural machine, arranged upon a boom secured to the frame of the machine by hinge means and adapted to move in both the vertical and the horizontal plane, characterized in that, in a manner known per se, at least one tension element is arranged between the boom and the frame, on the front side of the said boom as seen in the direction of travel, the said tension element being secured to the said frame at a distance, as seen in the direction of travel, in front of the hinge, in that the attachment point of said tension element to said frame lies upon a straight line, ascending as seen in the direction of travel and enclosing an angle (.alpha.) of about 25 to 45° to the horizontal; in that at least one tension element is also secured, between the frame and the boom, to the rear side of said boom, as seen in the direction of travel, and in that the attachment point of this tension element to the frame lies upon a straight line ascending in a direction opposite to the direction of travel, passing through the hinge, and enclosing an angle (.beta.) of approximately 25 to 45° to the horizontal.
4. A track-marker according to claim 3, characterized in that the magnitude of the angle (.alpha.) is approximately 33 to 38°
5. A track-marker according to claim 4, characterized in that the magnitude of the angle (.alpha.) is approximately 35°.
6. A track-marker according to claim 3, characterized in that the angle (.beta.) is of almost the same magnitude as the angle (.alpha.).
7. A track-marker according to claims 1 or 3, character-ized in that the distance (C) between the hinge and the attach-ment point of the tension element on the boom is greater than the distance (D) between the hinge and the attachment point of the tension element on the frame.
8. A track-marker according to claims 1 or 3, character-ized in that the attachment point of the front tension element to the frame is located, as seen in the direction of travel, on the side of the hinge remote from the track-marker, when the latter is in the operative position.
9. A track marker according to claim 1, characterized in that at least one tension element is adapted to be shortened or lengthened by means of a device.
10. A track-marker according to claim 3, characterized in that at least one tension element is adapted to be shortened or lengthened by means of a device.
11. A track-marker according to claims 9 or 10, character-ized in that said device is arranged in the rear tension element.
12. A track-marker according to claims 9 or 10, character-ized in that said device is in the form of a cable, one end of which is secured to one of the tension elements, while the other end is attached to a hydraulic cylinder.
13. A track-marker according to claim 9, characterized in that said device is in the form of a pivot lever adapted to be pivoted by a hydraulic lever, the tension element being secured to said lever.
14. A track marker according to claim 10, characterized in that said device is in the form of a pivot lever adapted to be pivoted by a hydraulic lever, the tension element being secured to said lever.
15. A track-marker according to claim 13 or 14, character-ized in that the pivot lever, with the hydraulic cylinder, is arranged in a mounting, said mounting being arranged to pivot upon the frame at least in an upright plane.
16. A track-marker according to claim 1, characterized in that an overload fracture means is arranged at least between the front tension element and the frame or the boom.
17. A track-marker according to claim 3, characterized in that an overload fracture means is arranged at least between the front tension element and the frame or boom.
18. A track-marker according to claims 16 or 17, characterized in that said overload fracture means is in the form of a tripping device having at least one shear pin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3242932.0 | 1982-11-20 | ||
| DE19823242932 DE3242932C2 (en) | 1982-11-20 | 1982-11-20 | Markers for an agricultural machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1202529A true CA1202529A (en) | 1986-04-01 |
Family
ID=6178559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000441299A Expired CA1202529A (en) | 1982-11-20 | 1983-11-16 | Track-marker for an agricultural machine |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1202529A (en) |
| DE (1) | DE3242932C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785128A (en) * | 1996-03-18 | 1998-07-28 | Redekop; John K. | Field marker |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3576635D1 (en) * | 1984-09-25 | 1990-04-26 | Amazonen Werke Dreyer H | MACHINE FOR SIDE PUTTING IN PARTICULAR GRAINY MATERIAL. |
| DE3504906A1 (en) * | 1985-02-13 | 1986-08-14 | Amazonen-Werke H. Dreyer Gmbh & Co Kg, 4507 Hasbergen | TRACK MARKER FOR AN AGRICULTURAL MACHINE |
| NL1000920C2 (en) * | 1995-08-03 | 1997-02-04 | Maasland Nv | Seed drill. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1403908A (en) * | 1920-02-18 | 1922-01-17 | Mineart Christ | Corn-planter marker |
| US2722168A (en) * | 1951-03-23 | 1955-11-01 | Martin G Aljets | Lift for grain drill markers |
| US3537533A (en) * | 1968-03-28 | 1970-11-03 | Deere & Co | Automatic marker changers for farm implements |
| FR2227813B1 (en) * | 1973-05-02 | 1978-06-23 | Nodet Gougis |
-
1982
- 1982-11-20 DE DE19823242932 patent/DE3242932C2/en not_active Expired
-
1983
- 1983-11-16 CA CA000441299A patent/CA1202529A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785128A (en) * | 1996-03-18 | 1998-07-28 | Redekop; John K. | Field marker |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3242932A1 (en) | 1984-05-24 |
| DE3242932C2 (en) | 1985-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |